FOLDABLE CHAIR AND REINFORCEMENT STRUCTURE FOR LEG PIPE

Abstract

A foldable chair comprises two front leg pipes, two rear leg pipes, and a seat plate. Each of the two front leg pipes is sleeved with an outer sleeve, and an insert member moves in a radial direction to connect a corresponding one of the two front leg pipes and the outer sleeve in series. An inner end of the insert member extends inward and toward a corresponding one of two sides of the seat plate, and the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate, or the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate through a sliding sleeve. Part of weight is transmitted to the corresponding one of the two front leg pipes and the outer sleeve through the outer sleeve.

Description

RELATED APPLICATIONS

This application claims priority to Chinese patent application number 202222963390.5, filed on Nov. 3, 2022. Chinese patent application number 202222963390.5 is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to a foldable chair and a reinforcement structure for a leg pipe.

BACKGROUND OF THE DISCLOSURE

A front leg pipe and a rear leg pipe of a foldable chair are hinged in a herringbone shape. When the foldable chair is opened and used, an angle of inclination of the front leg pipe is larger than that of the rear leg pipe. Therefore, when a human body sits on the foldable chair, a weight of the human body applied on the front leg pipe in a vertical direction is greater than on the rear leg pipe. That is, a torsion value borne by the front leg pipe is greater than on the rear leg pipe. In other words, a position on the front leg pipe that is hinged with a seat plate is more likely to be broken.

The foldable chair is a necessary piece of furniture for ordinary families After decades of improvement in structure, a production cost has dropped again and again, and the profit margin is very limited. The leg pipes are all hollow tubes. For increasing a torsion limit of the front leg pipe, a wall thickness of the front leg pipe is increased. In this way, an overall weight of the foldable chair will increase by a large proportion, resulting in a large increase in the cost of the foldable chair, which is an unacceptable method for the manufacturer. Therefore, under a premise of strictly controlling the production cost, improving the structure to increase a load-bearing capacity of the foldable chair has always been a major problem for manufacturers.

BRIEF SUMMARY OF THE DISCLOSURE

The present disclosure provides a foldable chair and a reinforcement structure for a leg pipe, which can strictly control a production cost while improving a load-bearing capacity and overcomes the deficiencies in the background.

In order to solve the technical problem, a first technical solution of the present disclosure is as follows.

A foldable chair comprises two front leg pipes symmetrically arranged in a left and right direction, two rear leg pipes symmetrically arranged in the left and right direction, and a seat plate. Two sides of the seat plate are connected to the two front leg pipes and the two rear leg pipes, and the two front leg pipes are arranged obliquely when the foldable chair is in an open use state. Each of the two front leg pipes is sleeved with an outer sleeve located at a position at which a corresponding one of the two front leg pipes is connected to the seat plate, and an insert member is configured to move in a radial direction to connect the corresponding one of the two front leg pipes and the outer sleeve in series. An inner end of the insert member extends inward and toward a corresponding one of the two sides of the seat plate, and the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate, or the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate through a sliding sleeve. Part of weight borne by the seat plate is transmitted to the corresponding one of the two front leg pipes and the outer sleeve through the outer sleeve.

In a preferred embodiment, the insert member is a rivet, and the seat plate is configured to be rotated around the insert member.

In a preferred embodiment, the insert member is configured to enable the corresponding one of the two front leg pipes, the outer sleeve, and the corresponding one of the two sides of the seat plate to be connected together in series.

In a preferred embodiment, a gasket is disposed between the outer sleeve and the corresponding one of the two sides of the seat plate, and the insert member is configured to pass through the gasket.

In a preferred embodiment, the gasket is a special-shaped gasket.

In a preferred embodiment, the inner end of the insert member is slidably connected to the corresponding one of the two sides of the seat plate through the sliding sleeve.

In a preferred embodiment, a length from an upper opening of the outer sleeve to the insert member is shorter than a length from a lower opening of the outer sleeve to the insert member.

A reinforcement structure for a leg pipe is provided. The leg pipe is arranged obliquely, and an insert member is inserted radially on the leg pipe. An outer sleeve is sleeved at a position of the insert member on the leg pipe, and the leg pipe and the outer sleeve are connected in series by the insert member. An inner end of the insert member is directly or indirectly connected to an object-bearing member, and part of weight of the object-bearing member is transmitted to the leg pipe and the outer sleeve through the insert member.

In a preferred embodiment, the insert member is a rivet.

In a preferred embodiment, the insert member is configured to enable the leg pipe, the outer sleeve, and the object-bearing member to be connected together in series.

Compared with the existing techniques, the technical solution has the following advantages.

The leg pipe or the two front leg pipes add an outer sleeve at a position where the insert member is located, which enhances the strength of the leg pipe or the two front leg pipes at a stressed position, thereby improving the support capacity of the leg pipe or the two front leg pipes, and the outer sleeve only needs to reinforce a force-bearing position. A length of the outer sleeve is very small compared to the leg pipe or the two front leg pipes, so that the outer sleeve is a very small addition to the weight of the leg pipe, the two front leg pipes, or the consumables, thereby effectively controlling the production cost of the product. In other words, in the case of achieving the same ultimate load-bearing capacity, the reinforcement structure for the leg pipe requires less consumables and costs, and the overall weight of the product is also smaller.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a perspective view of a foldable chair.

FIG. 2 illustrates an exploded view of the foldable chair shown in FIG. 1.

FIG. 3 illustrates an enlarged perspective view of a circled part in FIG. 1.

FIG. 4 illustrates a cross-sectional view of the part shown in FIG. 3.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present disclosure will be further described below in combination with the accompanying drawings and embodiments.

Referring to FIG. 1 to FIG. 4, a foldable chair comprises two front leg pipes 10 symmetrically arranged in a left and right direction, two rear leg pipes 20 symmetrically arranged in the left and right direction, and a seat plate 30. Two sides of the seat plate 30 are connected to the two front leg pipes 10 and the two rear leg pipes 20. The two front leg pipes 10 and the two rear leg pipes 20 are arranged obliquely when the foldable chair is in an open use state. Of course, an angle of inclination of the two front leg pipes 10 is greater than that of the two rear leg pipes 20, so that the two front leg pipes 10 are more easily deformed or damaged. A general structure of the foldable chair is very diverse, and the products are also very common, so a positional connection relationship between the two front leg pipes 10, the two rear leg pipes 20, and the seat plate 30 will not be further discussed, and the present disclosure is not limited to this embodiment. Each of the two front leg pipes 10 is sleeved with an outer sleeve 40 located at a position at which a corresponding one of the two front leg pipes 10 is connected to the seat plate 30, and an insert member 50 is configured to move in a radial direction (i.e., a radial direction of the corresponding one of the two front leg pipes 10) to connect the corresponding one of the two front leg pipes 10 and the outer sleeve 40. An inner end of the insert member 50 extends inward and toward a corresponding one of the two sides of the seat plate 30, and the inner end of the insert member 50 is connected to the corresponding one of the two sides of the seat plate 30. Of course, the inner end of the insert member 50 can also be connected to the corresponding one of the two sides of the seat plate 30 through a sliding sleeve, so that when the seat plate 30 bears weight, part of the weight borne by the seat plate 30 is transmitted to the corresponding one of the two front leg pipes 10 and the outer sleeve 40 through the insert member 50.

Although the two front leg pipes 10 of the foldable chair are more likely to be deformed or damaged, the two front leg pipes 10 and the two rear leg pipes 20 still need to have a same diameter. The main reason the diameters of the two front leg pipes 10 and the rear leg pipes 20 of the foldable chair are the same is for consideration of packaging and stacking of the foldable chair and simplifying a production and assembly process of leg pipes. Therefore, when it is necessary to increase a carrying capacity of the foldable chair, the two front leg pipes 10 and the two rear leg pipes 20 must be thickened at the same time. Taking a step back, even if a thickness of the two front leg pipes 10 is only theoretically increased, an increase of the cost is also great. As a contrast in the present disclosure, a small piece (i.e., the outer sleeve 40) is added to a preset position of the two front leg pipes 10 to increase strength of the two front leg pipes 10, and the foldable chair can also be produced and assembled with the original accessories, effectively controlling the production cost of the product.

Preferably, the insert member 50 is a rivet, and the seat plate 30 can be rotated around the insert member 50. The rivet can directly enable the outer sleeve 40 to be pressed on the corresponding one of the two front leg pipes 10, so that the outer sleeve 40 and the corresponding one of the two front leg pipes 10 are integrated and have stronger strength.

Preferably, the insert member 50 is configured to enable the corresponding one of the two front leg pipes 10, the outer sleeve 40, and the corresponding one of the two sides of the seat plate 30 to be connected together in series. That is, the rivet is directly inserted into the seat plate 30, which has a simple structure. Of course, the inner end of the insert member 50 can also be slidably connected to the corresponding one of the two sides of the seat plate 30 through the sliding sleeve.

Preferably, a gasket 60 is disposed between the outer sleeve 40 and the corresponding one of the two sides of the seat plate 30, and the insert member 50 is configured to pass through the gasket 60. The gasket 60 can better clamp the seat plate 30, preventing the seat plate 30 from shaking, and improving firmness of the foldable chair. Further preferably, the gasket 60 is a special-shaped gasket, and the gasket 60 has a shape other than flat.

Preferably, a length from an upper opening of the outer sleeve 40 to the insert member 50 is shorter than a length from a lower opening of the outer sleeve 40 to the insert member 50. Since a lower end of the two front leg pipes 10 is supported on ground, a weakest position of the two front leg pipes 10 is below the insert member 50, so that the length from the upper opening of the outer sleeve 40 to the insert member 50 can be saved, effectively controlling the cost.

It can be understood that the present disclosure can also be applied to other products by adding the outer sleeve 40 to the two front leg pipes 10 at the position where the two front leg pipes 10 bears the weight (i.e., the position of the insert member 50 to improve support strength of the two front leg pipes 10). Therefore, in fact, the present disclosure also provides a reinforcement structure for strengthening an inclined support leg pipe. Specifically, when the reinforcement structure is provided, a leg pipe (such as the two front leg pipes 10) is arranged obliquely, an insert member (such as the insert member 50) is inserted radially on the leg pipe, an outer sleeve (such as the outer sleeve 40) is sleeved at a position of the insert member on the leg pipe, and the leg pipe and the outer sleeve are connected in series by the insert member. An inner end of the insert member is directly or indirectly connected to an object-bearing member (such as the seat plate 30), and part of gravity of the object-bearing member is transmitted to the leg pipe and the outer sleeve through the insert member.

The aforementioned embodiments are merely some embodiments of the present disclosure, and the scope of the disclosure is not limited thereto. Thus, it is intended that the present disclosure cover any modifications and variations of the presently presented embodiments provided they are made without departing from the appended claims and the specification of the present disclosure.

Claims

1. A foldable chair, comprising:

two front leg pipes symmetrically arranged in a left and right direction,

two rear leg pipes symmetrically arranged in the left and right direction, and

a seat plate, wherein: two sides of the seat plate are connected to the two front leg pipes and the two rear leg pipes, the two front leg pipes are arranged obliquely when the foldable chair is in an open use state, each of the two front leg pipes is sleeved with an outer sleeve located at a position at which a corresponding one of the two front leg pipes is connected to the seat plate, an insert member is configured to move in a radial direction to connect the corresponding one of the two front leg pipes and the outer sleeve in series, an inner end of the insert member extends inward and toward a corresponding one of the two sides of the seat plate, the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate, or the inner end of the insert member is connected to the corresponding one of the two sides of the seat plate through a sliding sleeve, and part of weight borne by the seat plate is transmitted to the corresponding one of the two front leg pipes and the outer sleeve through the outer sleeve.

2. The foldable chair according to claim 1, wherein:

the insert member is a rivet, and

the seat plate is configured to be rotated around the insert member.

3. The foldable chair according to claim 2, wherein:

the insert member is configured to enable the corresponding one of the two front leg pipes, the outer sleeve, and the corresponding one of the two sides of the seat plate to be connected together in series.

4. The foldable chair according to claim 3, wherein:

a gasket is disposed between the outer sleeve and the corresponding one of the two sides of the seat plate, and

the insert member is configured to pass through the gasket.

5. The foldable chair according to claim 4, wherein:

the gasket has a shape other than flat.

6. The foldable chair according to claim 2, wherein:

the inner end of the insert member is slidably connected to the corresponding one of the two sides of the seat plate through the sliding sleeve.

7. The foldable chair according to claim 1, wherein:

a length from an upper opening of the outer sleeve to the insert member is shorter than a length from a lower opening of the outer sleeve to the insert member.

8. A reinforcement structure for a leg pipe, wherein:

the leg pipe is arranged obliquely,

an insert member is inserted radially on the leg pipe,

an outer sleeve is sleeved at a position of the insert member on the leg pipe,

the leg pipe and the outer sleeve are connected in series by the insert member,

an inner end of the insert member is directly or indirectly connected to an object-bearing member, and

part of weight of the object-bearing member is transmitted to the leg pipe and the outer sleeve through the insert member.

9. The reinforcement structure for a leg pipe according to claim 8, wherein:

the insert member is a rivet.

10. The reinforcement structure for a leg pipe according to claim 9, wherein:

the insert member is configured to enable the leg pipe, the outer sleeve, and the object-bearing member to be connected together in series.