SINGLE-POWER LIFTING AND FOLDING MECHANISMS AND FURNITURE

Abstract

The present disclosure relates to a single-power lifting and folding mechanism and a piece of furniture. The single-power lifting and folding mechanism includes a first lifting mechanism, a second lifting mechanism, a first flexible rope, and a driving device, wherein the first lifting mechanism includes a first movable component and a first fixed component, the second lifting mechanism includes a second movable component and a second fixed component, one end of the first flexible rope is fixedly connected to the first fixed component, the other end of the first flexible rope is fixedly connected to the second fixed component, the second fixed component is provided with the driving device, and the driving device abuts against a rotating shaft of the third movable pulley directly or indirectly and subsequently tensions the first flexible rope.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of International Application No. PCT/CN2024/082008, filed on Mar. 15, 2024, which claims priority to Chinese Patent Application No. 202310276834.4, filed on Mar. 21, 2023, the entire contents of each of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of mechanical structure, and in particular relates to a single-power lifting and folding mechanism and a piece of furniture.

BACKGROUND

As a common household item, a conventional table is formed by fixedly connecting a tabletop to table legs. The height of the table legs is fixed, resulting in a non-adjustable height of the entire tabletop. However, with different application environments and diverse application demands of different user groups, there is an increasingly higher demand for tables with adjustable height, improved automation, and enhanced comfort.

The current lifting table includes a plurality of support columns, and the plurality of support columns form a lifting and folding mechanism. The plurality of support columns need to be controlled to lift and lower synchronously. If the lifting and lowering of the plurality of support columns are not synchronized, the tabletop may tilt or fail to maintain a specific inclined angle. Moreover, when each of the plurality of support columns requires independent lifting and lowering control, it becomes particularly challenging to achieve synchronization.

Therefore, it is necessary to provide an improved lifting and folding mechanism and a piece of furniture.

SUMMARY

One or more embodiments of the present disclosure provide a single-power lifting and folding mechanism. The single-power lifting and folding mechanism includes a first lifting mechanism, a second lifting mechanism, a first flexible rope, and a driving device. The first lifting mechanism includes a first movable component and a first fixed component. The first movable component is disposed on the first fixed component. The first movable component is configured to move relative to the first fixed component. An upper portion of the first movable component is provided with a first movable pulley, and a lower portion of the first movable component is provided with a second movable pulley. The second lifting mechanism includes a second movable component and a second fixed component. The second movable component is slidably disposed on the second fixed component. An upper portion of the second movable component is provided with a third movable pulley. One end of the first flexible rope is fixedly connected to the first fixed component, the other end of the first flexible rope is fixedly connected to the second fixed component after passing around the second movable pulley, the first movable pulley, and the third movable pulley. The second fixed component is provided with the driving device, and the driving device abuts against a rotating shaft of the third movable pulley directly or indirectly and subsequently tensions the first flexible rope.

In some embodiments, the single-power lifting and folding mechanism further includes a third lifting mechanism and a second flexible rope. The third lifting mechanism includes a third movable component and a third fixed component. The third movable component is slidably disposed on the third fixed component. An upper portion of the third movable component is provided with a fourth movable pulley, and a lower portion of the third movable component is provided with a fifth movable pulley. The upper portion of the first movable component or the upper portion of the second movable component is provided with a sixth movable pulley. One end of the second flexible rope is fixedly connected to the third fixed component, the other end of the second flexible rope is fixedly connected to the first fixed component or the second fixed component after passing around the fifth movable pulley, the fourth movable pulley, and the sixth movable pulley, and the second flexible rope is in the tensioned state.

In some embodiments, the upper portion of the first movable component is provided with a pulley mounting base. The pulley mounting base moves synchronously with a movement of the first movable component, and both the first movable pulley and the sixth movable pulley are mounted on the pulley mounting base.

In some embodiments, the single-power lifting and folding mechanism further includes at least one fourth lifting mechanism and at least one third flexible rope. Each fourth lifting mechanism includes a fourth movable component and a fourth fixed component. The fourth movable component is slidably disposed on the fourth fixed component. An upper portion of the fourth movable component is provided with a seventh movable pulley, and a lower portion of the fourth movable component is provided with an eighth movable pulley. A ninth movable pulley is disposed on the upper portion of the first movable component or the upper portion of the second movable component or the upper portion of the third movable component. One end of the at least one third flexible rope is fixedly connected to the fourth fixed component, the other end of the at least one third flexible rope is fixedly connected to the first fixed component or the second fixed component or the third fixed component after passing around the eighth movable pulley, the seventh movable pulley, and the ninth movable pulley. The at least one third flexible rope is in the tensioned state. The fourth movable component is configured to lift and lower synchronously with the first movable component, the second movable component, and the third movable component.

In some embodiments, the first movable component and the first fixed component are both tubular. The first fixed component is sleeved on the first movable component, a sliding guide assembly is disposed on the first movable component, and the sliding guide assembly is configured to guide sliding of the first movable component within the first fixed component.

In some embodiments, the sliding guide assembly includes a fixed sleeve and a sliding member, the fixed sleeve is fixedly disposed on the first movable component, and the sliding member is rotatably disposed on the fixed sleeve.

In some embodiments, the first fixed component includes a first fixed member body and a first fixed rod. The first movable component is slidably connected to the first fixed member body. The first fixed rod extends into the first movable component, a top end of the first fixed rod is higher than the second movable pulley, and one end of the first flexible rope is fixedly connected to an upper portion of the first fixed rod.

In some embodiments, the first fixed rod is made of a metal profile or a bar stock or a tube.

In some embodiments, the first fixed component includes a first fixed member body and a first support plate. A bottom end of the first fixed member body is fixedly connected to the first support plate; the first movable component is disposed on the first fixed member body, and the first movable component is configured to move relative to the first fixed member body.

In some embodiments, the first lifting mechanism and the second lifting mechanism are strip-shaped, the first lifting mechanism is parallel to the second lifting mechanism, and the first lifting mechanism and the second lifting mechanism form an angle with a vertical direction, respectively.

In some embodiments, the single-power lifting and folding mechanism further includes a first crossbeam. The first crossbeam connects the first movable component and the second movable component.

In some embodiments, the driving device is a gas spring. The gas spring includes a pressure cylinder and a piston rod. The pressure cylinder is disposed on the second fixed component, and the piston rod is connected to the second movable component or the first crossbeam.

In some embodiments, the driving device is a gas spring. The gas spring includes a pressure cylinder and a piston rod. The piston rod is connected to the second fixed component, and the pressure cylinder is connected to the second movable component or the first crossbeam.

In some embodiments, the driving device includes at least one of a gas spring, a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

One or more embodiments of the present disclosure provide a piece of furniture. The piece of furniture includes a single-power lifting and folding mechanism and a tabletop. The single-power lifting and folding mechanism includes a first lifting mechanism, a second lifting mechanism, a first flexible rope, and a driving device. The first lifting mechanism includes a first movable component and a first fixed component. The first movable component is disposed on the first fixed component. The first movable component is configured to move relative to the first fixed component. An upper portion of the first movable component is provided with a first movable pulley, and a lower portion of the first movable component is provided with a second movable pulley. The second lifting mechanism includes a second movable component and a second fixed component. The second movable component is slidably disposed on the second fixed component. An upper portion of the second movable component is provided with a third movable pulley. One end of the first flexible rope is fixedly connected to the first fixed component, and the other end of the first flexible rope is fixedly connected to the second fixed component after passing around the second movable pulley, the first movable pulley, and the third movable pulley. The second fixed component is provided with the driving device, and the driving device abuts against a rotating shaft of the third movable pulley directly or indirectly and subsequently tensions the first flexible rope. The tabletop is fixedly connected to a top portion of the single-power lifting and folding mechanism, and the single-power lifting and folding mechanism is configured to adjust a height of the tabletop.

In some embodiments, the single-power lifting and folding mechanism further includes a third lifting mechanism and a second flexible rope. The third lifting mechanism includes a third movable component and a third fixed component. The third movable component is slidably disposed on the third fixed component. An upper portion of the third movable component is provided with a fourth movable pulley, and a lower portion of the third movable component is provided with a fifth movable pulley. The upper portion of the first movable component or the upper portion of the second movable component is provided with a sixth movable pulley. One end of the second flexible rope is fixedly connected to the third fixed component, the other end of the second flexible rope is fixedly connected to the first fixed component or the second fixed component after passing around the fifth movable pulley, the fourth movable pulley, and the sixth movable pulley, and the second flexible rope is in the tensioned state.

In some embodiments, the upper portion of the first movable component is provided with a pulley mounting base. The pulley mounting base moves synchronously with a movement of the first movable component, and both the first movable pulley and the sixth movable pulley are mounted on the pulley mounting base.

In some embodiments, the single-power lifting and folding mechanism includes at least one fourth lifting mechanism and at least one third flexible rope. Each fourth lifting mechanism includes a fourth movable component and a fourth fixed component. The fourth movable component is slidably disposed on the fourth fixed component, an upper portion of the fourth movable component is provided with a seventh movable pulley, and a lower portion of the fourth movable component is provided with an eighth movable pulley. A ninth movable pulley is disposed on the upper portion of the first movable component or the upper portion of the second movable component or the upper portion of the third movable component. One end of the at least one third flexible rope is fixedly connected to the fourth fixed component, and the other end of the at least one third flexible rope is fixedly connected to the first fixed component or the second fixed component or the third fixed component after passing around the eighth movable pulley, the seventh movable pulley, and the ninth movable pulley. The at least one third flexible rope is in the tensioned state, and the fourth movable component is configured to lift and lower synchronously with the first movable component, the second movable component, and the third movable component.

In some embodiments, a bottom portion of the tabletop is provided with at least one fixed pulley. The first flexible rope passes around the at least one fixed pulley, and/or the second flexible rope passes around the at least one fixed pulley, and/or the at least one third flexible rope passes around the at least one fixed pulley, and at least one of the first flexible rope, the second flexible rope, or the at least one third flexible rope is located below the tabletop.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will be further illustrated by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. The embodiments are not limiting, and in the embodiments, the same numbering denotes the same structure, wherein:

FIG. 1 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some embodiments of the present disclosure;

FIG. 2 is a schematic diagram illustrating a longitudinal sectional view of a lifting and folding mechanism according to some embodiments of the present disclosure;

FIG. 3 is a schematic diagram illustrating a three-dimensional structure of a movable pulley and a first flexible rope according to some embodiments of the present disclosure;

FIG. 4 is a schematic diagram illustrating a winding configuration of a first flexible rope around a first movable pulley and a second movable pulley according to some embodiments of the present disclosure;

FIG. 5 is a schematic diagram illustrating a driving device mounted on a side of a second fixed component close to a first lifting mechanism according to some embodiments of the present disclosure;

FIG. 6 is a schematic diagram illustrating force-induced tilt of a driving device mounted on a side close to a first lifting mechanism according to some embodiments of the present disclosure;

FIG. 7 is a schematic diagram illustrating a driving device connected with a second movable component and abutting against a rotating shaft of a third movable pulley according to some embodiments of the present disclosure;

FIG. 8 is a schematic diagram illustrating a driving device connected to a tabletop and abutting against a rotating shaft of a third movable pulley according to some embodiments of the present disclosure;

FIG. 9 is an analysis diagram illustrating a moving displacement of a second movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure;

FIG. 10 is an analysis diagram illustrating a moving displacement of a first movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure;

FIG. 11 is an analysis diagram illustrating a moving displacement of a movable pulley group consisting of a first movable pulley and a second movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure;

FIG. 12 is an analysis diagram illustrating a moving displacement of a third movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure;

FIG. 13 is a schematic diagram illustrating a connection of a movable pulley with a first flexible rope according to some embodiments of the present disclosure;

FIG. 14 is an analysis diagram illustrating a moving displacement of a first movable pulley, a second movable pulley, and a third movable pulley according to some embodiments of the present disclosure;

FIG. 15 is another schematic diagram illustrating a movable pulley and a first flexible rope according to some embodiments of the present disclosure;

FIG. 16 is a schematic diagram illustrating a movable component sleeved on a fixed component according to some embodiments of the present disclosure;

FIG. 17 is a schematic diagram illustrating a three-dimensional sectional view of a movable component sleeved on a fixed component according to some embodiments of the present disclosure;

FIG. 18 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure;

FIG. 19 is a schematic diagram illustrating a winding configuration of a flexible rope around a movable pulley according to some other embodiments of the present disclosure;

FIG. 20 is a schematic diagram illustrating a structure of a pulley mounting base installed with a first movable pulley and a sixth movable pulley according to some other embodiments of the present disclosure;

FIG. 21 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure;

FIG. 22 is a schematic diagram illustrating a winding configuration of a flexible rope around a movable pulley according to some more embodiments of the present disclosure;

FIG. 23 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure;

FIG. 24 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism after being lifted according to some other embodiments of the present disclosure; and

FIG. 25 is a schematic diagram illustrating a winding configuration of a flexible rope around a fixed pulley according to some embodiments of the present disclosure.

DETAILED DESCRIPTION

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings required to be used in the description of the embodiments will be briefly described below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present disclosure, and it is possible for a person of ordinary skill in the art to apply the present disclosure to other similar scenarios in accordance with these drawings without creative labor. Unless obviously obtained from the context or the context illustrates otherwise, the same numeral in the drawings refers to the same structure or operation.

A lifting and folding mechanism can lift and lower, so as to drive a tabletop of a piece of furniture to lift and lower accordingly. When lowering, the lifting and folding mechanism enables certain components to fold and contract, which can reduce an overall volume of the furniture and realize folding.

FIG. 1 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some embodiments of the present disclosure; FIG. 2 is a schematic diagram illustrating a longitudinal sectional view of a lifting and folding mechanism according to some embodiments of the present disclosure; FIG. 3 is a schematic diagram illustrating a three-dimensional structure of a movable pulley and a first flexible rope according to some embodiments of the present disclosure; and FIG. 4 is a schematic diagram illustrating a winding configuration of a first flexible rope around a first movable pulley and a second movable pulley according to some embodiments of the present disclosure.

As shown in FIG. 1 to FIG. 4, some embodiments of the present disclosure provide a single-power lifting and folding mechanism, and the single-power lifting and folding mechanism includes a first lifting mechanism 1, a second lifting mechanism 2, a first flexible rope 3, and a driving device 4.

The first lifting mechanism 1 includes a first movable component 5 and a first fixed component 6. The first movable component 5 is disposed on the first fixed component 6, and the first movable component 5 is configured to move relative to the first fixed component 6. An upper portion of the first movable component 5 is provided with a first movable pulley 7, and a lower portion of the first movable component 5 is provided with a second movable pulley 8. The second lifting mechanism 2 includes a second movable component 9 and a second fixed component 10, the second movable component 9 is slidably disposed on the second fixed component 10, and an upper portion of the second movable component 9 is provided with a third movable pulley 11. One end of the first flexible rope 3 is fixedly connected to the first fixed component 6, and the other end of the first flexible rope 3 is fixedly connected to the second fixed component 10 after passing around the second movable pulley 8, the first movable pulley 7, and the third movable pulley 11. The second fixed component 10 is provided with the driving device 4, and the driving device 4 abuts against a rotating shaft 111 of the third movable pulley 11 directly or indirectly and subsequently tensions the first flexible rope 3.

The first lifting mechanism 1 refers to a mechanical device capable of realizing a position change of the single-power lifting and folding mechanism in a vertical direction or an approximate vertical direction (e.g., at an angle in a range of 5° to 10° from the vertical direction).

The first movable component 5 refers to a part of the first lifting mechanism 1 that moves during a lifting and lowering process of the single-power lifting and folding mechanism.

The first fixed component 6 refers to a part of the first lifting mechanism 1 that remains relatively stationary during the lifting and lowering process of the single-power lifting and folding mechanism.

In some embodiments, the first movable component 5 is disposed on the first fixed component 6, and the first movable component 5 may move relative to the first fixed component 6.

In some embodiments, the first fixed component 6 may include a first fixed member body 61 and a first fixed rod 24. The first movable component 5 is slidably connected to the first fixed member body 61. The first fixed rod 24 extends into the first movable component 5, and a top end of the first fixed rod 24 is higher than the second movable pulley 8. One end of the first flexible rope 3 is fixedly connected to an upper portion of the first fixed rod 24.

The first fixed member body 61 refers to a main part of the first fixed component 6.

The first fixed rod 24 refers to a part that moves relative to the first fixed member body 61.

In some embodiments of the present disclosure, by providing the first fixed rod to extend into the first movable component, the first flexible rope can be fixedly connected to the first fixed component from within the first movable component. This eliminates the need to create a slot on the first movable component for the first flexible rope to pass through before connecting to the first fixed component, thereby facilitating assembly.

In some embodiments, the first fixed rod 24 may be made of a metal profile or a bar stock or a tube.

In some embodiments of the present disclosure, the use of metal profiles such as channel steel, angle steel, and square steel can ensure the strength of the first fixed rod, preventing deformation such as bending during operating, thereby reducing the risk of desynchronization in the movement of the components.

In some embodiments, the first fixed component 6 may include the first fixed member body 61 and a first support plate 27, a bottom end of the first fixed member body 61 is fixedly connected to the first support plate 27, the first movable component 5 is disposed on the first fixed member body 61 to form a moving pair with the first fixed member body 61, and the first movable component 5 is configured to move relative to the first fixed member body 61.

The first support plate 27 refers to a part that supports the first lifting mechanism 1 on the ground.

In some embodiments, the first support plate 27 is in an overall inverted T shape with the first fixed member body 61. Referring to FIG. 1, a length direction of the first support plate 27 may be an x-axis direction, and a length direction of the first fixed member body 61 may be a z-axis direction.

In some embodiments of the present disclosure, using the first support plate can increase the contact area between the first lifting mechanism and the ground, which improves the stability.

In some embodiments, the first movable component 5 and the first fixed component 6 are tubular, and a cross-sectional shape of the first movable component 5 perpendicular to a length direction of the first movable component 5 and a cross-sectional shape of the first fixed component 6 perpendicular to a length direction of the first fixed component 6 may be the same.

In some embodiments, the cross-sectional shape of the first movable component 5 perpendicular to the length direction of the first movable component 5 and the cross-sectional shape of the first fixed component 6 perpendicular to the length direction of the first fixed component 6 may be regular shapes such as triangles, quadrilaterals, pentagons, or other irregular shapes.

In some embodiments, the first fixed component 6 is sleeved on the first movable component 5, and a sliding guide assembly 23 is disposed on the first movable component 5.

The sliding guide assembly 23 refers to a mechanical structure that guides and constrains a movement of the first movable component 5.

In some embodiments, the sliding guide assembly 23 is configured to guide sliding of the first movable component 5 within the first fixed component 6.

In some embodiments of the present disclosure, tubular movable and fixed components are adopted, which facilitates easier sliding installation between the movable and fixed components, and the sliding of the movable component relative to the fixed component is smoother by providing the sliding guide assembly.

In some embodiments, the sliding guide assembly 23 includes a fixed sleeve 231 and a sliding member 232, the fixed sleeve 231 is fixedly disposed on the first movable component 5, and the sliding member 232 is rotatably disposed on the fixed sleeve 231.

The fixed sleeve 231 refers to a base and a support body of the sliding guide assembly 23, which provides a mounting position and support for the sliding member 232.

The sliding member 232 refers to a part that moves relative to the first fixed member body 61.

In some embodiments, the sliding member 232 may be a ball, a roller, a wheel, etc.

In some embodiments of the present disclosure, it is more convenient for the first movable component to slide relative to the first fixed component through the sliding member.

In some embodiments, the upper portion of the first movable component 5 is provided with the first movable pulley 7, the lower portion of the first movable component 5 is provided with the second movable pulley 8. The first movable pulley 7 and the second movable pulley 8 are rotationally mounted on the first movable component 5 through a rotating shaft, respectively. As shown in FIG. 1, the upper portion may be considered to be an end portion of the first movable component 5 along a positive direction of the z-axis, and the lower portion may be considered to be an end portion of the first movable component 5 along a negative direction of the z-axis.

In some embodiments, the first movable pulley 7 may be disposed at a top portion of the first movable component 5, i.e., at an uppermost end along the positive direction of the z-axis, and the second movable pulley 8 may be disposed at a bottom portion of the first movable component 5, i.e., at a lowermost end of the first movable component 5 along the negative direction of the z-axis.

In some embodiments, similar to the first lifting mechanism 1, the second lifting mechanism 2 includes the second movable component 9 and the second fixed component 10.

In some embodiments, similar to the first fixed component 6, the second fixed component 10 includes a second fixed member body 101 and a second support plate 28, wherein a bottom end of the second fixed member body 101 is fixedly connected to the second support plate 28, and the second movable component 9 is slidably mounted on the second fixed member body 101.

In some embodiments, a shape and a height of the second movable component 9 are same as a shape and a height of the first movable component 5, and a shape and a height of the second fixed member body 101 are same as a shape and a height of the first fixed member body 61.

In some embodiments, the upper portion of the second movable component 9 is provided with the third movable pulley 11, and the third movable pulley 11 may be rotationally mounted on the second movable component 9 through the rotating shaft of the third movable pulley 11.

In some embodiments, a height of the third movable pulley 11 is equal to a height of the first movable pulley 7.

In some embodiments, the third movable pulley 11 is mounted on a top portion of the second movable component 9.

In some embodiments, the second movable component 9 is slidably disposed within the second fixed member body 101 through the sliding guide assembly 23. The second movable component 9 is disposed in a similar manner as the first movable component 5, which may be found in previous description.

In some embodiments, the single-power lifting and folding mechanism further includes a first crossbeam 12, wherein the first crossbeam 12 connects the first movable component 5 and the second movable component 9.

In some embodiments of the present disclosure, the stability of the single-power lifting and folding mechanism can be increased by providing the first crossbeam.

In some embodiments, as shown in FIG. 3, one end of the first flexible rope 3 is fixedly connected to the first fixed component 6, and the other end of the first flexible rope 3 is fixedly connected to the second fixed component 10 after passing around the second movable pulley 8, the first movable pulley 7, and the third movable pulley 11.

Merely by way of example, the first movable component 5 and the second movable component 9 are connected to the first crossbeam 12 or a tabletop 13 in an operating state; and one end of the first flexible rope 3 is fixedly connected to the first fixed component 6 above the second movable pulley 8 (i.e., in the positive direction of the z-axis), and the other end of the first flexible rope 3 is fixedly connected to the second fixed component 10 downward (i.e. in the negative direction towards the z-axis) after passing around the second movable pulley 8 downward (i.e., in the negative direction of the z-axis), then passing around the first movable pulley 7 upward (i.e., in the positive direction of the z-axis), and passing around the third movable pulley 11 along a horizontal direction toward the second movable component 9. The tabletop 13 refers to a platform-like structure of furniture equipped with a single-power lifting and folding mechanism, and more descriptions regarding the tabletop 13 may be found in related descriptions below.

In some embodiments, the first flexible rope 3 may be fixedly connected to the first fixed component 6 and the second fixed component 10 through welding, screwing, adhesive bonding, snap-fit connection, etc.

The driving device 4 refers to a device that provides power for the single-power lifting and folding mechanism.

In some embodiments, the driving device 4 is configured to drive the second movable component 9 to lift and lower.

In some embodiments, the driving device 4 is disposed on the second fixed component 10.

In some embodiments, the driving device 4 is disposed on the second support plate 28 of the second fixed component 10 and is connected to the second movable component 9, the first crossbeam 12, or the tabletop 13. The driving device 4 abuts against the rotating shaft 111 of the third movable pulley 11 and subsequently tensions the first flexible rope 3 through the second movable component 9, the first crossbeam 12, or the tabletop 13. The driving device 4 drives the first crossbeam 12, a side of the tabletop 13 connected to the second movable component 9, or the second movable component 9 to lift and lower, which causes the first flexible rope 3 to transmit a tension force and a limiting pull effect to the first lifting mechanism 1, so as to drive the first crossbeam 12 or the other side of the tabletop 13 and the second movable component 9 to lift and lower synchronously. The driving device 4 directly abuts against the rotating shaft 111 of the third movable pulley 11, which may be considered as the driving device 4 directly contacting and abutting against the rotating shaft 111 of the third movable pulley 11 to provide a rigid support. The driving device 4 indirectly abuts against the rotating shaft 111 of the third movable pulley 11, which may be considered as the driving device 4 abutting against the rotating shaft 111 of the third pulley 11 through the second movable component 9 or the first crossbeam 12 or the tabletop 13 to provide the rigid support.

The limiting pull effect refers to an effect of limiting a moving range of an object by a tension force of a flexible rope.

In some embodiments, as shown in FIG. 3, the driving device 4 is a gas spring, and the gas spring includes a pressure cylinder 25 and a piston rod 26.

In some embodiments, the pressure cylinder 25 is disposed on the second support plate 28 of the second fixed component 10, the piston rod 26 extends and contracts along a direction of the z-axis, the piston rod 26 is connected to the second movable component 9, the first crossbeam 12, or the tabletop 13, and extension and retraction of the piston rod 26 may drive the second movable component 9, the first crossbeam 12, or the tabletop 13 to lift and lower.

In some embodiments of the present disclosure, the gas spring drives the overall lifting and lowering, which facilitates not only the control of the lifting and lowering process but also the installation of the driving device, while reducing the space occupied by the driving device; the piston rod drives components such as the second movable component and the first crossbeam to move, which is conductive to the operation stability and prolonging the service life of the piston rod.

In some embodiments, the piston rod 26 of the gas spring may also be connected to the second support plate 28 of the second fixed component 10, and the pressure cylinder 25 of the gas spring is connected to the second movable component 9, the first crossbeam 12, or the tabletop 13.

In some embodiments of the present disclosure, the gas spring drives components such as the second movable component and the first crossbeam to move, which is conductive to save space.

In some embodiments, the driving device 4 includes at least one of the gas spring, a hydraulic cylinder, a pneumatic cylinder, an electric push rod, or a manually-powered push rod.

In some embodiments of the present disclosure, a suitable drive can be selected based on different costs, accuracy requirements, etc.

FIG. 5 is a schematic diagram illustrating a driving device mounted on a side close to a first lifting mechanism according to some embodiments of the present disclosure; FIG. 6 is a schematic diagram illustrating force-induced tilt of a driving device mounted on a side close to a first lifting mechanism according to some embodiments of the present disclosure; FIG. 7 is a schematic diagram illustrating a driving device connected with a second movable component and abutting against a rotating shaft of a third movable pulley according to some embodiments of the present disclosure; and FIG. 8 is a schematic diagram illustrating a driving device connected to a tabletop and abutting against a rotating shaft of a third movable pulley according to some embodiments of the present disclosure.

Merely by way of example, as shown in FIG. 5, the driving device 4 is not within a supporting range of the second lifting mechanism 2, i.e., the driving device 4 does not directly or indirectly abut against the rotating shaft 111 of the third movable pulley 11 and tension the first flexible rope 3 (e.g., the driving device 4 is disposed on a side of the second lifting mechanism 2 and close to the first lifting mechanism 1). At this time, as shown in FIG. 6, when an external force F is applied on a side that is beyond the supporting range of the second lifting mechanism 2 and away from the first lifting mechanism 1, a side of the tabletop 13 away from the first lifting mechanism 1 may move downward firstly, which causes the tabletop 13 to become destabilized and unbalanced, thus preventing all parts of the tabletop 13 from synchronous lifting and lowering.

In some embodiments, the driving device 4 is disposed within the supporting range of the second lifting mechanism 2 to achieve that the driving device 4 directly or indirectly abuts against the rotating shaft 111 of the third movable pully 11 and tensions the first flexible rope 3. As shown in FIG. 7, the driving device 4 is disposed in the second lifting mechanism 2 and directly connected to the second movable component 9, and the driving device 4 abuts against the rotating shaft 111 of the third movable pully 11 and tensions the first flexible rope 3 through the second movable component 9.

In some embodiments, as shown in FIG. 8, the driving device 4 is disposed on a side away from the first lifting mechanism 1 and away from the second lifting mechanism 2, and supports the tabletop 13; the first flexible rope 3 is in a tensioned state after the driving device 4 abuts against the rotating shaft 111 of the third movable pulley 11; and when the tabletop 13 is pressed downward, the driving device 4 abuts against the rotating shaft 111 of the third movable pulley 11, and the first flexible rope 3 is still in the tensioned state.

In some embodiments, the first lifting mechanism 1 and the second lifting mechanism 2 are driven to lift and lower synchronously by providing a gas spring. When the gas spring drives the second movable component 9, the first crossbeam 12, or the tabletop 13 to lift, the first flexible rope 3 pulls the first movable component 5 to lift by an equal distance synchronously, thereby achieving simultaneous lifting of the first lifting mechanism 1 and the second lifting mechanism 2. When the second movable component 9, the first crossbeam 12, or the tabletop 13 moves downward (e.g., when the first crossbeam 12 or the tabletop 13 is pressed downward), the first flexible rope 3 performs a limiting pull effect on the first movable pulley 7 and the second movable pulley 8, to drive the first crossbeam 12 or the tabletop 13 and the first movable component 5 to lower synchronously, thereby achieving simultaneous lowering of the first lifting mechanism 1 and the second lifting mechanism 2.

In some embodiments, the first flexible rope 3 may include any one of various rubber bands, ropes, steel wires, steel bands, fiber bands, fiber wires, chains, etc.

In some embodiments, the first movable pulley 7, the second movable pulley 8, and the third movable pulley 11 include a pulley, a sprocket, etc., that fits with the first flexible rope 3.

The following provides an exemplary explanation of the principle by which the first flexible rope 3 moves in cooperation with the first movable pulley 7, the second movable pulley 8, and the third movable pulley 11.

It is understood that a pulley whose shaft moves with a pulled object is called a movable pulley. In some embodiments of the present disclosure, the first movable pulley 7 and the second movable pulley 8 are both disposed on the first movable component 5, and when the first movable component 5 moves upward and downward, a rotating shaft of the first movable pulley 7 and a rotating shaft of the second movable pulley 8 move upward and downward with the first movable component 5, so the first movable pulley 7 and the second movable pulley 8 arc movable pulley. The third movable pulley 11 is disposed on the second movable component 9, and when the second movable component 9 moves upward and downward, the third movable pulley 11 also moves upward and downward, so the third movable pulley 11 is also the movable pulley.

Typically, a plurality of movable pulleys may not effectively form an independent movable pulley group that is fully functioned without the participation of a fixed pulley. However, in some embodiments of the present disclosure, since the first movable component 5 slides relative to the first fixed component 6, and the second movable component 9 slides relative to the second fixed component 10, the independent movable pulley group is formed and fully functioned.

Within a conventional parallel two-rope system with a single movable pullcy, a magnitude of an extension displacement of a free end of a flexible rope is twice that of a moving displacement of the movable pulley. In some embodiments of the present disclosure, the relative sliding of the first movable component 5 and the first fixed component 6 is utilized to enable that a magnitude of a displacement of the free end of the flexible rope connected to a hard-connected movable pulley group (i.e., the first movable pulley 7, the second movable pulley 8, and the first movable component 5) becomes equal to a magnitude of a displacement of movable pulleys (i.e., the first movable pulley 7 and the second movable pulley 8) of the hard-connected movable pulley group. Meanwhile, within a movable pulley system that cooperatively connects the second movable component 9 and the second fixed component 10, a magnitude of a contraction displacement of the free end of the first flexible rope 3 is equal to a magnitude of the moving displacement of the movable pulley group. Two free ends of the first flexible rope 3, which connects the first lifting mechanism 1 and the second lifting mechanism 2, undergo equal but opposite displacements: one extends while the other retracts by exactly the same magnitude. Therefore, when the two free ends of the first flexible rope 3 are connected overlappingly, the first movable pulley 7, the second movable pulley 8, and the third movable pulley 11 arc combined to form a single movable pulley group. The single movable pulley group, the first flexible rope 3, two parallel lifting mechanisms (i.e., the first lifting mechanism 1 and the second lifting mechanism 2), and the first crossbeam 12 or the tabletop 13, cooperating with the driving device 4, collectively solve the synchronous lifting and folding problem of the single-power lifting and folding mechanism.

FIG. 9 is an analysis diagram illustrating a moving displacement of a second movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure.

As shown in FIG. 9, the first movable component 5 moves upward, and the second movable pulley 8 is mounted at a bottom end of the first movable component 5 only. Two portions of the first flexible rope 3 on both sides of the single second movable pulley 8 arc parallel to each other and parallel to a sliding direction of the first movable component 5. A free end LF of the first flexible rope 3 extends and moves, and a magnitude of an extension displacement LE1 is twice that of a moving displacement LD1 of the second movable pulley 8, and directions of the extension displacement LE1 and the moving displacement LD1 are also the same, i.e., LE1=2*LD1.

FIG. 10 is an analysis diagram illustrating a moving displacement of a first movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure.

As shown in FIG. 10, a single first movable pulley 7 is disposed on a top end of the first movable component 5 only. Two portions of the first flexible rope 3 on both sides of the single first movable pulley 7 are non-parallel, and only the portion of the first flexible rope 3 on one side of the single first movable pulley 7 is parallel to a movement direction of the first movable component 5. The free end LF of the portion of the first flexible rope 3 on the other side of the single first movable pulley 7 slides along a direction that forms an angle BL with a horizontal direction, the free end LF of the first flexible rope 3 contracts and moves in a direction toward the first movable pulley 7, and a magnitude of a contraction displacement LE2 is equal to that of an upward displacement LD2 of the first movable pulley 7. Since the first movable pulley 7 moves upward and the free end LF of the first flexible rope 3 contracts, LE2=−LD2.

FIG. 11 is an analysis diagram illustrating a moving displacement of a movable pulley group consisting of a first movable pulley and a second movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure.

As shown in FIG. 11, the first movable pulley 7, the second movable pulley 8, the first movable component 5, and the first flexible rope 3 are combined. The first movable pulley 7 and the second movable pulley 8 are mounted on a top end and a bottom end of the first movable component 5, respectively, to form a hard-connected movable pulley group, and a sliding direction of the movable pulleys is parallel to a sliding direction of the first movable component 5. At this time, an extension displacement of the first flexible rope 3 is LE3, and a moving displacement of the movable pulley group consisting of the first movable pulley 7, the second movable pulley 8, and the first movable component 5 moving upward is LD3, at this time: LE3=LE1+LE2; since: LE1=2*LD1, LE2=−LD2, LE3=2*LD1+ (−LD2). When trajectories of the first movable component 5 in the above FIG. 9, FIG. 10, and FIG. 11 are the same, magnitudes of the displacement of the second movable pulley 8 in the above FIG. 9, FIG. 10, and FIG. 11 are the same, i.e., LD1=LD2=LD3, since LE3=2*LD3+(−LD3), LE3=LD3.

Therefore, the magnitude of the extension displacement LE3 of the free end LF of the first flexible rope 3 is equal to that of the moving displacement LD3 of movable pulleys of the hard-connected movable pulley group.

FIG. 12 is an analysis diagram illustrating a moving displacement of a third movable pulley and a moving displacement of a first flexible rope according to some embodiments of the present disclosure.

As shown in FIG. 12, the second movable component 9 moves upward, and a third movable pulley 11 is mounted on a top end of the second movable component 9 only. Two portions of the first flexible rope 3 on both sides of the single third movable pulley 11 are non-parallel, and only one portion of the first flexible rope 3 on a side of the single third movable pulley 11 is parallel to a sliding direction of the second movable component 9, and a free end of the first flexible rope 3 on the other side of the single third movable pulley 11 slides along a direction which forms an angle BR with a horizontal direction. At this time, the free end RF of the first flexible rope 3 contracts, and a magnitude of a contraction displacement RE1 is equal to a magnitude of a moving displacement RD1 of the third movable pulley 11. Since the third movable pulley 11 moves upward and the first flexible rope 3 contracts, RE1=−RD1. The free end LF and the free end RF of the first flexible rope 3 overlap and connect with each other and the first flexible rope 3 contracts, i.e., LE3+RE1=0, since LD3+(−RD1)=0, LD3=RD1.

Therefore, at this time, the first movable component 5 and the second movable component 9 have the same magnitude of displacements and the same displacement direction.

FIG. 13 is a schematic diagram illustrating a connection of a movable pulley with a first flexible rope according to some embodiments of the present disclosure; FIG. 14 is an analysis diagram illustrating a moving displacement of a first movable pulley, a second movable pulley, and a third movable pulley according to some embodiments of the present disclosure; and FIG. 15 is another schematic diagram illustrating a movable pulley and a first flexible rope according to some embodiments of the present disclosure.

As shown in FIG. 13, FIG. 14, and FIG. 15, the free end LF and the free end RF of the first flexible rope 3 overlap and connect with each other and the first flexible rope 3 contracts. At this time, the first movable pulley 7 and the second movable pulley 8 on the first movable component 5 form a small hard-connected movable pulley group, and the small hard-connected movable pulley group forms a large hard-connected movable pulley group with the third movable pulley 11 on the second movable component 9, i.e., the first movable pulley 7, the second movable pulley 8, and the third movable pulley 11 are combined to form a large single movable pulley group. At this time, the first movable component 5 forms a synchronous lifting frame by using the first crossbeam 12 or the tabletop 13 alone and using the first crossbeam 12 or the tabletop 13 to connect the second movable component 9, the first movable component 5 slidingly cooperates with the first fixed component 6, and the second movable component 9 slidingly cooperates with the second fixed component 10. One end of the first flexible rope 3 is connected to the first movable pulley 7 and the second movable pulley 8 of the first movable component 5 after being fixed to the first fixed component 6, and the other end of the first flexible rope 3 is fixed to the second fixed component 10 after being connected to the third movable pulley 11 on the second movable component 9. A single driving device 4 maintains support and is rigidly fixedly connected to the synchronous lifting frame and the second fixed component 10, and the driving device 4 drives the first movable component 5 to move with a displacement E1 having the same magnitude as a displacement E2 of the second movable component 9, and the directions of displacements E1 and E2 are also the same, so that a synchronous lifting and folding mechanism that may be lifted synchronously is formed.

FIG. 16 is a schematic diagram illustrating a movable component sleeved on a fixed component according to some embodiments of the present disclosure; and FIG. 17 is a schematic diagram illustrating a three-dimensional sectional view of a movable component sleeved on a fixed component according to some embodiments of the present disclosure.

As shown in FIG. 16 and FIG. 17, in some embodiments, the first movable component 5 may be sleeved on the first fixed member body 61, and relative sliding between the first fixed member body 61 and the first movable component 5 is maintained. The second movable component 9 is sleeved on the second fixed member body 101, which is in the same structure as the first movable component 5 sleeved on the first fixed member body 61, and will not be repeated further.

Taking the first movable component 5 as an example, the first movable component 5 includes an inner movable member body 5-1 and an outer movable member body 5-2. The inner movable member body 5-1 extends from a top portion of the first fixed member body 61 into the first fixed member body 61, and the outer movable member body 5-2 is sleeved on the first fixed member body 61. The first movable pulley 7 and the second movable pulley 8 are disposed on the inner movable member body 5-1, respectively. A rotating shaft of the first movable pulley 7 is connected to the outer movable member body 5-2 after passing through the inner movable member body 5-1. A rotating shaft of the second movable pulley 8 is connected to the inner movable member body 5-1 only and does not contact with the first fixed member body 61. In some embodiments, the inner movable member body 5-1 may be made of channel steel.

FIG. 18 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure; FIG. 19 is a schematic diagram illustrating a winding configuration of a flexible rope around a movable pulley according to some other embodiments of the present disclosure; and FIG. 20 is a schematic diagram illustrating a structure of a pulley mounting base installed with a first movable pulley and a sixth movable pulley according to some other embodiments of the present disclosure.

As shown in FIG. 18 to FIG. 20, in some embodiments, the single-power lifting and folding mechanism is further provided with a third lifting mechanism 14 and a second flexible rope 15.

In some embodiments, similar to the first lifting mechanism 1, the third lifting mechanism 14 includes a third movable component 16 and a third fixed component 17.

In some embodiments, similar to the first fixed component 6, the third fixed component 17 includes a third fixed member body 171 and a third support plate.

In some embodiments, a shape and a height of the third movable component 16 are same as a shape and a height of the second movable component 9, and a shape and a height of the third fixed member body 171 are same as a shape and a height of the second fixed member body 101.

In some embodiments, similar to the second movable component 9, the third movable component 16 is slidably mounted to the third fixed member body 171 using the sliding guide assembly 23.

In some embodiments, an upper portion of the third movable component 16 is provided with a fourth movable pulley 18, a lower portion of the third movable component 16 is provided with a fifth movable pulley 19.

In some embodiments, the fourth movable pulley 18 and the fifth movable pulley 19 are disposed on a top end and a bottom end of the third movable component 16, respectively.

In some embodiments, the upper portion of the first movable component 5 or the upper portion of the second movable component 9 is provided with a sixth movable pulley 20. One end of the second flexible rope 3 is fixedly connected to the third fixed component 17, and the other end of the second flexible rope 3 is fixedly connected to the first fixed component 6 or the second fixed component 10 after passing around the fifth movable pulley 19, the fourth movable pulley 18, and the sixth movable pulley 20. The second flexible rope 15 is in a tensioned state.

Merely by way of example, the top end of the third movable component 16 is connected to the tabletop 13 in an operating state, or to the first movable component 5 or the second movable component 9 via a second crossbeam 21. One end of the second flexible rope 15 is fixedly connected to the third movable component 17 above the fifth movable pulley 19, and the other end of the second flexible rope 15 is fixedly connected to the first fixed component 6 or the second fixed component 10 after passing around the fifth movable pulley 19, the fourth movable pulley 18 and the sixth movable pulley 20, respectively. The second flexible rope 15 is in the tensioned state, and the third movable component 16 lifts and lowers synchronously with the first movable component 5 and the second movable component 9.

In some embodiments, the first movable component 5, the first fixed member body 61, the second movable component 9, the second fixed member body 101, the third movable component 16, and the third fixed member body 171 are all in a form of a cylinder structure with a triangular cross section.

The sixth movable pulley 20 is disposed on a top end of the first movable component 5, facilitating the installation of the sixth movable pulley 20 and the first movable pulley 7 on the first movable component 5.

In some embodiments of the present disclosure, the first lifting mechanism, the second lifting mechanism, and the third lifting mechanism lift and lower synchronously by providing the third lifting mechanism and the second flexible rope and transmitting the tension force and limiting pull effect by the second flexible rope. When the single-power lifting and folding mechanism supports a larger tabletop, more support points are provided for the tabletop to improve the stability of the tabletop in the operating state while maintaining various portions of the tabletop to lift and lower synchronously.

In some embodiments, as shown in FIG. 20, an upper portion of the first movable component 5 is provided with a pulley mounting base 22, the pulley mounting base 22 moves synchronously with a movement of the first movable component 5, and both the first movable pulley 7 and the sixth movable pulley 20 are mounted on the pulley mounting base 22. The first movable pulley 7 and the sixth movable pulley 20 may be rotatably mounted on the pulley mounting base 22 by a rotating shaft, respectively.

The pulley mounting base 22 refers to a base for mounting the pulley.

In some embodiments, the second movable pulley 8, the third movable pulley 11, the fourth movable pulley 18, and the fifth movable pulley 19 may be mounted using a corresponding pulley mounting base 22, respectively.

In some embodiments, when the first movable component 5 moves upward, the second flexible rope 15 pulls the third movable component 16 to move upward on the third fixed member body 171 by a distance equal to a distance that the first movable component 5 moves upward, thereby enabling the first movable component 5, the second movable component 9, and the third movable component 16 to moves upward synchronously. When the first movable component 5 moves downward, the second flexible rope 15 transmits the limiting pull effect to the fourth movable pulley 18 and the fifth movable pulley 19, and drives the second crossbeam 21 or the tabletop 13 and the third movable component 16 to lower synchronously, thereby realizing the synchronous lowering of the first lifting mechanism 1, the second lifting mechanism 2, and the third lifting mechanism 14.

In some embodiments, the first lifting mechanism 1, the second lifting mechanism 2, and the third lifting mechanism 14 may be distributed in a zigzag shape or in a triangular shape.

In some embodiments of the present disclosure, the pulley mounting base is provided for convenient for the installation of the first movable pulley and the fourth movable pulley, and ensuring that the first movable pulley and the fourth movable pulley do not interfere with each other.

FIG. 21 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure; and FIG. 22 is a schematic diagram illustrating a winding configuration of a flexible rope around a movable pulley according to some more embodiments of the present disclosure.

In some embodiments, as shown in FIG. 21 and FIG. 22, a single-power lifting and folding mechanism further includes at least one fourth lifting mechanism 30 and at least one third flexible rope 31, wherein each fourth lifting mechanism 30 includes a fourth movable component 32 and a fourth fixed component 33.

In some embodiments, a count of the fourth lifting mechanisms 30 is equal to a count of the third flexible ropes 31.

As shown in FIG. 21, in some embodiments, similar to the first fixed component 6, the fourth fixed component 33 includes a fourth fixed member body 331 and a fourth support plate.

In some embodiments, a bottom end of the fourth fixed member body 331 is fixedly connected to the fourth support plate in an inverted T shape, the fourth movable component 32 is slidably disposed on the fourth fixed member body 331, an upper portion of the fourth movable component 32 is provided with a seventh movable pulley 34, and a lower portion of the fourth movable component 32 is provided with an eighth movable pulley 35. As shown in FIG. 22, a ninth movable pulley 36 is disposed on an upper portion of the first movable component 5 or an upper portion of the second movable component 9 or an upper portion of the third movable component 16.

In some embodiments, one end of the at least one third flexible rope 31 is fixedly connected to the fourth fixed component 33, and the other end of the at least one third flexible rope 31 is fixedly connected to the first fixed component 6 or the second fixed component 10 or the third fixed component 17 after passing around the eighth movable pulley 35, the seventh movable pulley 34, and the ninth movable pulley 36. The at least one third flexible rope 31 is in a tensioned state, and the fourth movable component 32 lifts and lowers synchronously with the first movable component 5, the second movable component 9, and the third movable component 16.

Merely by way of example, a top portion of the fourth movable component 32 is connected to the tabletop 13 in an operating state, or is connected to the first movable component 5, the second movable component 9, or the third movable component 16 through a third crossbeam 37. One end of the third flexible rope 31 is connected to the fourth movable component 16 above the eighth movable pulley 35, and the other end of the third flexible rope 31 is fixedly connected to the first fixed component 6, the second fixed component 10, or the third fixed component 17 after passing around the eighth movable pulley 35, the seventh movable pulley 34, and the ninth movable pulley 36, respectively. The third flexible rope 31 is in the tensioned state to enable the fourth movable component 32, the first movable component 5, and the second movable component 9 to lift and lower synchronously. The structure of the fourth lifting mechanism 30 is the same as the structure of the first lifting mechanism 1.

In some embodiments, when the first movable component 5 moves upward, the third flexible rope 31 pulls the fourth movable component 32 to move upward on the fourth fixed member body 311 by a distance equal to a distance that the first movable component 5 moves upward, thereby enabling the first movable component 5, the second movable component 9, the third movable component 16, and the fourth movable component 32 to moves upward. When the first movable component 5 moves downward, the third flexible rope 31 transmits the limiting pull effect and drives the tabletop 13 or the third crossbeam 37 and the fourth movable component 32 to lower synchronously, thereby realizing the synchronous lowering of the first movable component 5, the second movable component 9, the third movable component 16, and the fourth movable component 32.

In some embodiments, one or more fourth lifting mechanisms 30 may be provided.

In some embodiments, where one fourth lifting mechanism 30 is provided, one end of the third flexible rope 31 away from the fourth lifting mechanism 30 may be fixedly connected to any one of the first fixed component 6, the second fixed component 10, or the third fixed component 17.

In some embodiments, when two or more fourth lifting mechanisms 30 are provided, for one of two or more third flexible ropes 31, one end of the third flexible rope 31 is fixedly connected to the fourth fixed component 33, and the other end of the third flexible rope 31 is fixedly connected to the first fixed component 6, the second fixed component 10, or the third fixed component 17. For each of the remaining two or more third flexible ropes 31, one end of the third flexible rope 31 is connected to the fourth fixed component 33, while the other end of the third flexible rope 31 may be fixedly connected not only to the first fixed component 6, the second fixed component 10, or the third fixed component 17, but also to the fourth fixed component 33. The tension force and the limiting pull effect are transmitted through the two or more third flexible ropes 31 to enable all of the two or more fourth lifting mechanisms 30 to lift and lower synchronously with the first lifting mechanism 1, the second lifting mechanism 2, and the third lifting mechanism 14.

In some embodiments, the first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14, and the fourth lifting mechanism 30 may be arranged along a zigzag shape, a triangle shape, a polygonal shape, or any other irregular shape.

In some embodiments, a suitable count of the fourth lifting mechanisms 30 may be provided in the operating state based on a size of the tabletop 13 to be supported, and an arranged manner of the first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14, and the fourth lifting mechanism 30 may be provided based on the shape of the tabletop 13 to be supported.

In some embodiments of the present disclosure, by providing one or more fourth lifting mechanisms and transmitting the tension force and the limiting pull effect by each third flexible rope, the fourth movable component of each fourth lifting mechanism lifts and lowers synchronously with the first movable component, the second movable component, and the third movable component without increasing the count of driving devices, which ensure that the single-power lifting and folding mechanism supports the tabletop in the operating state and provides more support for the tabletop, thereby further improving the stability of the tabletop.

FIG. 23 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism according to some other embodiments of the present disclosure; and FIG. 24 is a schematic diagram illustrating a three-dimensional structure of a lifting and folding mechanism after being lifted according to some other embodiments of the present disclosure.

In some embodiments, as shown in FIG. 23 and FIG. 24, the first lifting mechanism 1 and the second lifting mechanism 2 are strip-shaped, the first lifting mechanism 1 and the second lifting mechanism 2 are parallel with each other, and the first lifting mechanism 1 and the second lifting mechanism 2 form an angle with a vertical direction (i.e., a direction of a z-axis).

In some embodiments, the first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14, and all the fourth lifting mechanisms 30 are strip-shaped, parallel to each other, and form an angle with the vertical direction.

In some embodiments of the present disclosure, the single-power lifting and folding mechanism can be arranged appropriately according to the space in the operating state, so that the tabletop supported by the single-power lifting and folding mechanism satisfies the space requirements.

In some embodiments of the present disclosure, only one driving device is provided, and when the driving device drives the second movable component, the first crossbeam connected to the first movable component and the second movable component, or a side connected to the first movable component of the tabletop supported by the single-power lifting and folding mechanism to lift, the third movable pulley lifts with the second movable component and pulls the first movable component to lift synchronously, thus driving the other side of the tabletop or the crossbeam to lift synchronously. Therefore, the single-power lifting and folding mechanism can realize the synchronous lifting of the first lifting mechanism and the second lifting mechanism through only one driving device by providing the movable pulley and the first flexible rope and transmitting the tension force through the first flexible rope.

When the tabletop needs to be lowered, as shown in FIG. 7, under a sufficiently large external force F applied on a side close to the second movable component 9, the second movable component 9 lowers and drives the same side of the tabletop 13 to lower at the same time, the first flexible rope does not transmit a propulsive force at this time, the first movable component 5 may rely on a combined force G of a gravity of the first movable component 5 and a portion of gravity of the tabletop 13 and the first crossbeam 12 close to the first movable component 5 to overcome a frictional resistance f between the first movable component 5 and the first fixed component 6, thereby realizing the lowering of the first movable component 5. Since the driving device 4 directly or indirectly abuts against the rotating shaft of the third movable pulley 11 and always tensions the first flexible rope 3 to perform the limiting pull effect, the second movable component 9 and the first movable component 5 lower synchronously. The single-power lifting and folding mechanism used for furniture to adjust the height of the furniture may ensure that a tabletop of the furniture does not tilt or ensure that the tabletop of the furniture maintains a specific tilt angle of the furniture itself when adjusting the height of the furniture. The single-power lifting and folding mechanism is only provided one driving device, which makes the structure simple, the operation reliable, and the cost low.

Some embodiments of the present disclosure provide a piece of furniture including a single-power lifting and folding mechanism and the tabletop 13.

The single-power lifting and folding mechanism may be any single-power lifting and folding mechanism of the preceding embodiments. Merely by way of example, the single-power lifting and folding mechanism includes the first lifting mechanism 1, the second lifting mechanism 2, the first flexible rope 3, and the driving device 4. The first lifting mechanism 1 includes the first movable component 5 and the first fixed component 6. The first movable component 5 is disposed on the first fixed component 6, and the first movable component 5 is configured to move relative to the first fixed component 6. The upper portion of the first movable component 5 is provided with the first movable pulley 7, and the lower portion of the first movable component 5 is provided with the second movable pulley 8. The second lifting mechanism 2 includes the second movable component 9 and the second fixed component 10. The second movable component 9 is slidably disposed on the second fixed component 10, and the upper portion of the second movable component 9 is provided with the third movable pulley 11. One end of the first flexible rope 3 is fixedly connected to the first fixed component 6, and the other end of the first flexible rope 3 is fixedly connected to the second fixed component 10 after passing around the second movable pulley 8, the first movable pulley 7, and the third movable pulley 11. The second fixed component 10 is provided with the driving device 4, the driving device 4 abuts against the rotating shaft of the third movable pulley 11 directly or indirectly and subsequently tensions the first flexible rope 3.

In some embodiments, the tabletop 13 of the furniture is fixedly connected to a top portion of the single-power lifting and folding mechanism, and the single-power lifting and folding mechanism is configured to adjust a height of the tabletop 13. In some embodiments, the furniture may be a table, and the tabletop 13 may be a desktop of the furniture.

In some embodiments, a cross-sectional shape of the tabletop 13 may be a triangular, a quadrangular, or other polygonal shapes, or shapes with outwardly protruding edges such as circular, oval, or L-shaped, as well as shapes with slightly inwardly recessed edges such as a floral (e.g., plum blossom) pattern.

In some embodiments, the single-power lifting and folding mechanism is arranged based on the shape of the tabletop 13 to keep the first flexible rope 3, the second flexible rope 15, and the third flexible rope 31 all located below the tabletop 13.

In some embodiments of the present disclosure, owing to the excellent lifting synchronization of the lifting and folding mechanism, all parts of the tabletop move synchronously during operation. In any state, the tabletop remains fully synchronized during lifting, preventing tilting. Even if the tabletop starts from an initially tilted state, it maintains the same tilt angle throughout the lifting process.

Taking the furniture being a table as example, the tabletop 13 serves as a desktop, and the desktop is an irregular shape with significant inward recesses along the edges, such as a U-shaped desktop. The tabletop 13 of the furniture is fixedly connected to the top portion of the single-power lifting and folding mechanism, and the lifting and lowering of the single-power lifting and folding mechanism is used to adjust the height of the tabletop 13 of the furniture.

FIG. 25 is a schematic diagram illustrating a winding configuration of a flexible rope around a fixed pulley according to some embodiments of the present disclosure.

As shown in FIG. 25, in some embodiments, a bottom portion of the tabletop 13 is provided with at least one fixed pulley 38.

In some embodiments, the first flexible rope 3 passes around the at least one fixed pulley 38.

In some embodiments, the second flexible rope 15 passes around the at least one fixed pulley 38.

In some embodiments, at least one third flexible rope 31 passes around the least one fixed pulley 38.

In some embodiments, at least one of the first flexible rope 3, the second flexible rope 15, or the at least one third flexible rope 31 is located below the tabletop 13.

In some embodiments of the present disclosure, the synchronous lifting and lowering of the tabletop of the furniture can be ensured while keeping the tabletop of the furniture from tilting, the fixed pulleys can be provided appropriately based on the shape of the tabletop. The positions of the first flexible rope, the second flexible rope, and/or the third flexible rope can be limited to enable that the first flexible rope, the second flexible rope, and/or the third flexible rope not partially extend beyond the outside of the tabletop, thereby enhancing the aesthetic appearance.

Some embodiments of the present disclosure provide a single-power lifting and folding mechanism and a piece of furniture, which can transmit the tension force and the limiting pull effect during the lifting and lowering process by the cooperation of flexible ropes and movable pulleys. Therefore, the synchronous lifting of all the lifting mechanisms can be realized by providing a driving device only, which can avoid the issue of tilt in the supported tabletop caused by the difficulty in controlling the synchronized operation of a plurality of driving devices.

Any part of the above present disclosure that is not specifically described in the above present disclosure is prior art, or can be realized by prior art. The embodiments described in the present disclosure are only examples of better embodiments of the present disclosure, and are not intended to limit the scope of the present disclosure. That is, any equivalent changes and modifications made in accordance with the patent scope of the present disclosure shall be considered as the technical scope of the present disclosure.

Claims

1. A single-power lifting and folding mechanism, comprising: a first lifting mechanism, a second lifting mechanism, a first flexible rope, and a driving device, wherein:

the first lifting mechanism includes a first movable component and a first fixed component, the first movable component is disposed on the first fixed component, the first movable component is configured to move relative to the first fixed component, an upper portion of the first movable component is provided with a first movable pulley, a lower portion of the first movable component is provided with a second movable pulley, the second lifting mechanism includes a second movable component and a second fixed component, the second movable component is slidably disposed on the second fixed component, an upper portion of the second movable component is provided with a third movable pulley, one end of the first flexible rope is fixedly connected to the first fixed component, the other end of the first flexible rope is fixedly connected to the second fixed component after passing around the second movable pulley, the first movable pulley, and the third movable pulley, the second fixed component is provided with the driving device, and the driving device abuts against a rotating shaft of the third movable pulley directly or indirectly and subsequently tensions the first flexible rope.

2. The single-power lifting and folding mechanism according to claim 1, further comprising a third lifting mechanism and a second flexible rope, wherein:

the third lifting mechanism includes a third movable component and a third fixed component, the third movable component is slidably disposed on the third fixed component, an upper portion of the third movable component is provided with a fourth movable pulley, a lower portion of the third movable component is provided with a fifth movable pulley, the upper portion of the first movable component or the upper portion of the second movable component is provided with a sixth movable pulley, one end of the second flexible rope is fixedly connected to the third fixed component, the other end of the second flexible rope is fixedly connected to the first fixed component or the second fixed component after passing around the fifth movable pulley, the fourth movable pulley, and the sixth movable pulley, and the second flexible rope is in a tensioned state.

3. The single-power lifting and folding mechanism according to claim 2, wherein the upper portion of the first movable component is provided with a pulley mounting base, the pulley mounting base moves synchronously with a movement of the first movable component, and both the first movable pulley and the sixth movable pulley are mounted on the pulley mounting base.

4. The single-power lifting and folding mechanism according to claim 2, further comprising at least one fourth lifting mechanism and at least one third flexible rope, wherein:

each fourth lifting mechanism includes a fourth movable component and a fourth fixed component, the fourth movable component is slidably disposed on the fourth fixed component, an upper portion of the fourth movable component is provided with a seventh movable pulley, a lower portion of the fourth movable component is provided with an eighth movable pulley, a ninth movable pulley is disposed on the upper portion of the first movable component or the upper portion of the second movable component or the upper portion of the third movable component, one end of the at least one third flexible rope is fixedly connected to the fourth fixed component, the other end of the at least one third flexible rope is fixedly connected to the first fixed component or the second fixed component or the third fixed component after passing around the eighth movable pulley, the seventh movable pulley, and the ninth movable pulley, the at least one third flexible rope is in the tensioned state, and the fourth movable component is configured to lift and lower synchronously with the first movable component, the second movable component, and the third movable component.

5. The single-power lifting and folding mechanism according to claim 1, wherein the first movable component and the first fixed component are both tubular, the first fixed component is sleeved on the first movable component, a sliding guide assembly is disposed on the first movable component, and the sliding guide assembly is configured to guide sliding of the first movable component within the first fixed component.

6. The single-power lifting and folding mechanism according to claim 5, wherein the sliding guide assembly includes a fixed sleeve and a sliding member, the fixed sleeve is fixedly disposed on the first movable component, and the sliding member is rotatably disposed on the fixed sleeve.

7. The single-power lifting and folding mechanism according to claim 5, wherein the first fixed component includes a first fixed member body and a first fixed rod, the first movable component is slidably connected to the first fixed member body, the first fixed rod extends into the first movable component, a top end of the first fixed rod is higher than the second movable pulley, and one end of the first flexible rope is fixedly connected to an upper portion of the first fixed rod.

8. The single-power lifting and folding mechanism according to claim 7, wherein the first fixed rod is made of a metal profile or a bar stock or a tube.

9. The single-power lifting and folding mechanism according to claim 5, wherein the first fixed component includes a first fixed member body and a first support plate, a bottom end of the first fixed member body is fixedly connected to the first support plate; the first movable component is disposed on the first fixed member body, and the first movable component is configured to move relative to the first fixed member body.

10. The single-power lifting and folding mechanism according to claim 1, wherein the first lifting mechanism and the second lifting mechanism are strip-shaped, the first lifting mechanism is parallel to the second lifting mechanism, and the first lifting mechanism and the second lifting mechanism form an angle with a vertical direction, respectively.

11. The single-power lifting and folding mechanism according to claim 1, further comprising a first crossbeam, wherein the first crossbeam connects the first movable component and the second movable component.

12. The single-power lifting and folding mechanism according to claim 11, wherein the driving device is a gas spring, the gas spring includes a pressure cylinder and a piston rod; the pressure cylinder is disposed on the second fixed component, and the piston rod is connected to the second movable component or the first crossbeam.

13. The single-power lifting and folding mechanism according to claim 11, wherein the driving device is a gas spring, the gas spring includes a pressure cylinder and a piston rod; the piston rod is connected to the second fixed component, and the pressure cylinder is connected to the second movable component or the first crossbeam.

14. The single-power lifting and folding mechanism according to claim 1, wherein the driving device includes at least one of a gas spring, a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

15. A piece of furniture, comprising a single-power lifting and folding mechanism and a tabletop, wherein the single-power lifting and folding mechanism includes a first lifting mechanism, a second lifting mechanism, a first flexible rope, and a driving device, wherein the first lifting mechanism includes a first movable component and a first fixed component, the first movable component is disposed on the first fixed component, the first movable component is configured to move relative to the first fixed component, an upper portion of the first movable component is provided with a first movable pulley, a lower portion of the first movable component is provided with a second movable pulley, the second lifting mechanism includes a second movable component and a second fixed component, the second movable component is slidably disposed on the second fixed component, an upper portion of the second movable component is provided with a third movable pulley, one end of the first flexible rope is fixedly connected to the first fixed component, the other end of the first flexible rope is fixedly connected to the second fixed component after passing around the second movable pulley, the first movable pulley, and the third movable pulley, the second fixed component is provided with the driving device, and the driving device abuts against a rotating shaft of the third movable pulley directly or indirectly and subsequently tensions the first flexible rope; and

the tabletop is fixedly connected to a top portion of the single-power lifting and folding mechanism, and the single-power lifting and folding mechanism is configured to adjust a height of the tabletop.

16. The piece of furniture according to claim 15, wherein the single-power lifting and folding mechanism includes a third lifting mechanism and a second flexible rope, the third lifting mechanism includes a third movable component and a third fixed component, the third movable component is slidably disposed on the third fixed component, an upper portion of the third movable component is provided with a fourth movable pulley, a lower portion of the third movable component is provided with a fifth movable pulley, the upper portion of the first movable component or the upper portion of the second movable component is provided with a sixth movable pulley, one end of the second flexible rope is fixedly connected to the third fixed component, the other end of the second flexible rope is fixedly connected to the first fixed component or the second fixed component after passing around the fifth movable pulley, the fourth movable pulley, and the sixth movable pulley, and the second flexible rope is in a tensioned state.

17. The piece of furniture according to claim 16, wherein the upper portion of the first movable component is provided with a pulley mounting base, the pulley mounting base moves synchronously with a movement of the first movable component, and both the first movable pulley and the sixth movable pulley are mounted on the pulley mounting base.

18. The piece of furniture according to claim 17, wherein the single-power lifting and folding mechanism includes at least one fourth lifting mechanism and at least one third flexible rope, wherein each fourth lifting mechanism includes a fourth movable component and a fourth fixed component, the fourth movable component is slidably disposed on the fourth fixed component, an upper portion of the fourth movable component is provided with a seventh movable pulley, a lower portion of the fourth movable component is provided with an eighth movable pulley, a ninth movable pulley is disposed on the upper portion of the first movable component or the upper portion of the second movable component or the upper portion of the third movable component, one end of the at least one third flexible rope is fixedly connected to the fourth fixed component, the other end of the at least one third flexible rope is fixedly connected to the first fixed component or the second fixed component or the third fixed component after passing around the eighth movable pulley, the seventh movable pulley, and the ninth movable pulley, the at least one third flexible rope is in the tensioned state, and the fourth movable component is configured to lift and lower synchronously with the first movable component, the second movable component, and the third movable component.

19. The piece of furniture according to claim 18, wherein a bottom portion of the tabletop is provided with at least one fixed pulley; the first flexible rope passes around the at least one fixed pulley, and/or the second flexible rope passes around the at least one fixed pulley, and/or the at least one third flexible rope passes around the at least one fixed pulley, and at least one of the first flexible rope, the second flexible rope, or the at least one third flexible rope is located below the tabletop.