Abstract: A modular platform system utilizing a number of components including a platform. The platform is configured so that each of the components may interchangeably connect to any side of the platform. The components include, for example, handrails and stairways, as well as other platforms. The platform and most of the components are formed from single, continuous pieces of metal.

Abstract: A method and apparatus for holding a book or other hand-held object is disclosed. The book holder comprises an encasement portion and a book holder support platform attached thereto. The book holder support platform may be vertically lowered or raised to fit the needs of the user. The encasement portion comprises material that easily stretches over or around a seatback or other substantially vertically upright support structure.

Abstract: The present invention discloses a multi-stage height-adjustable table, including an operation control member and a table leg assembly arranged on the table board. The inner leg of the table leg assembly is sleeved in the hollow outer leg, and the inner leg has a containing groove for accommodating the elastic element. Operate the control element and move the table board according to the manipulation to drive the operation of the actuation unit of the operating wire linked to the table leg assembly. When the wire is operated on the wire, the inner leg can be lifted and lowered in the hollow outer leg. Then manipulate the operating control to make the operating wire in the pay-off state, and the actuation unit will abut one of the positioning parts of the inner leg post to form a position-fixed state, and adjust the height of the table accordingly.

Abstract: A multi-lift point elevator includes a lifting frame for elevating a plane. The lifting frame includes lift stanchions with telescoping tubes controlled by bias connectors extending into the telescoping tubes from leaf springs connected to the lifting frame. The leaf springs are activated by a connector extension, which urges the leaf springs away from the lift stanchions to release the bias connectors from the telescoping tubes to cause the telescoping tubes to extend or retract as a jack elevates or lowers the plane.

Abstract: A table includes a tabletop and a leg assembly to support the tabletop. The leg assembly includes first and second supports each movably connected with the table top. The leg assembly also includes an adjustable bar disposed substantially perpendicular to a height direction of the leg assembly. The adjustable bar has a first end connected with the first support and a second end connected with the second support such that changing a length of the adjustable bar changes a height of the leg assembly.

Abstract: An height-adjustment apparatus for a structure (e.g., a workstation, a work table, shelf system and/or a rack system) is disclosed including a release mechanism, a pawl coupled to the release mechanism and a sleeve including a plurality of slots. The plurality of slots is configured to receive a locking portion of the pawl, the sleeve is configured to be coupled to a support element (e.g., a leg or post) of the structure and while the release mechanism is activated the locking portion is configured to disengage from one of the plurality of slots and a height of a surface of the structure is configured to be adjusted. The surface of the structure is coupled to the apparatus via an end cap adapter.

Abstract: A telescopic module includes a first tube having a passageway therein; a second tube received in the passageway of the first tube for reciprocation; a hub connected to the second tube; a roller pivoted on the hub to touch the inner side of the first tube; and an adjusting member. The hub is provided with an expanding hole and flexible portions. The roller is pivoted on the flexible portion, and the adjusting member is inserted into the expanding hole and abuts against the flexible portions to move the roller outwardly.

Abstract: A stable lifting structure of a lifting desk contains: a first tube and a second tube movably fitted with the first tube so as to form a movable desk leg. The first tube includes a base, and the second tube includes a limitation sleeve. A movable cylinder is accommodated in the movable desk leg so that a body of the movable cylinder is locked on the first tube, and a column of the movable cylinder is connected on the second tube and is driven to expend or retract by an abutting plate and a pull cable. The first tube includes a slidable sleeve, and an inner diameter of the slidable sleeve corresponds to an outer diameter of the second tube. The slidable sleeve includes multiple recesses, a roll peg is accommodated in each recess, and each roll peg partially exposes outside the second tube via each recess.

Abstract: The assembly chair includes a pair of frames, a plurality of coupling rods, a plurality of pairs of depressed portions, at least one support member, and a sheet. The sheet is removably installed between the support member and the coupling rod. At least at one end portion of the sheet, the sheet includes a plurality of inserted portions along a width direction of the sheet. A flat plate is passed through at least one of the inserted portions. The support member with a flat intermediate portion is passed through another one of the inserted portions. The sheet is wound around outer peripheries of the inserted portion through which the plate is passed and the inserted portion through which the support member is passed to adjust a length of the sheet. In such state, the support member has both end portions fitted to the depressed portions on the frames.

Abstract: A movable adaptive structure for external devices has a main body and a movable element. The main body has an adapting window, an adapting terminal and a stationary portion. The adapting window is disposed on one side of the main body. The adapting terminal is disposed in the main body. The adapting terminal corresponds in position to the adapting window and thus is in communication with the outside, to adapt to an external device. The stationary portion is positioned proximate to the adapting window. The movable element has at least two positioning portions spaced apart and moves relative to the adapting window such that any one of the positioning portions is positioned at the stationary portion to change area of the adapting window. Therefore, the adaptive structure operates flexibly enough to adapt to the external device of variable dimensions.

Abstract: A modular desk system may include a plurality of configurable components including, for example, a top panel, an all-purpose hook, a cup hook, a storage shelf, a connecting shelf, a connecting planter box, a connecting divider, a connecting platform, a desktop organization member, a channel, a kickstand base, and/or a support frame. The components may be configured and/or reconfigured to create a desk. The configuration assemblies of the modular desk system may be paired with and coupled to other desk units and/or furniture.

Abstract: An apparatus for adjusting the assistive lifting force capacity of a height adjustable work surface. The apparatus includes a couple of plates which are mounted to a system for providing a system for adjusting the height of the work surface. The plates include a set of connection points for connecting the apparatus to a gas spring. The geometry of the holes and the positioning of the gas spring provide for a more consistent lifting force throughout a range of motion of the work surface.

Abstract: A gas cylinder quick release device has a cylindrical upper assembly, a cylindrical lower assembly arranged below the upper assembly on a common axis, and a handle which is mounted to move between a first position and a second position. Movement of the handle from the first position to the second position imparts axial displacement of the upper and lower assemblies away from each other along the axis, thereby breaking a press-fit engagement of a wheelbase otherwise secured on the gas cylinder.

Abstract: The present invention relates to a portable storage and locking apparatus that permits towing hitches and hitch-mountable accessories to be stored and locked to trailers, vehicles, buildings and other locations having exposed frames, beams, channels or other structures and storage locations. The apparatus does not require tools or hardware to mount and uses a pair of spaced-apart side plates joined to form a u-shaped mount that slides over a frame. The side plates have at least one pair of square-shaped aligned holes near the open ends, which extend past the frame and are configured to insert a towing hitch or accessory. With the apparatus over a frame, and a towing hitch or accessory inserted in the square holes, the apparatus is effectively secured to the frame and cannot be removed. A trailer hitch locking pin may be used to lock the hitch or accessory to the apparatus, and therefore to the frame.

Abstract: A height adjusting device for a bicycle includes a mounting tube, a seat post, and a ratchet member. The mounting tube is configured to be inserted into a seat tube of the bicycle, and defines therein an inner tube space. The seat post is telescopically received in the inner tubular space through an upper open end of the mounting tube, and has a rack region with a plurality of rack teeth. The ratchet member has a ratchet end which is rotatable about a ratchet axis among a forward position, a normal position, and a rearward position, and which is coupled to a selected one of rack teeth so as to permit said selected one of the rack teeth to be kept engaged relative to the ratchet end.

Abstract: A leg unit an outer tube with a fixing rod having several rod sections, each has two interconnected curved and straight sides, two curved sides along an axis defining a fixing channel; an inner tube inserted into the outer tube; and a carrier seat fixed to the inner tube, and a limiting seat seated within the carrier set such that the carrier and limiting seats can rotate together, the carrier seat has an axial hole, two stems extending transversely through the hole to restrict one rod section therebetween, the limit seat has a slide hole complementing with and permitting extension of the fixing rod; the inner tube is rotatable relative to the outer tube between an unlocked position, where movement between the inner and outer tubes is permitted and a locked position, where the stems are confined within the channels, thereby preventing movement between the inner and outer tubes.

Abstract: A height-adjustable table includes a frame supporting a work surface; a pair of lower legs supporting the frame; a pulley mechanism coupling the frame and the lower legs for vertically moving the frame relative to the lower legs; and a spring located within a passage extending through the frame. The spring has a fixed end secured to the frame and a movable end movable relative to the frame over a first distance for exerting a force over the first distance. The table further includes a block-and-tackle assembly located within the passage. The block-and-tackle assembly couples the movable end of the spring to the pulley mechanism for transferring the force exerted by the spring over the first distance to vertical movement of the frame relative to the lower legs over a second distance greater than the first distance.

Abstract: Systems and methods for adjustable telescopic support rods are provided. Specifically, the telescopic support rods in accordance with some embodiments comprise selectably modifiable indexed lengths having no externally visible indication of the indexing means. Methods for modulating the length of the support rod and its use in, for example, vertical support for scaffolding and shelving units are also provided.

Abstract: A movable stage system is configured to support an object subjected to a lithography process. A short stroke part (SS) is configured to support the object (W) and a long stroke part (LS) is configured to support the short stroke part. The short stroke part is movable over a relative small range of movement with respect to the long stroke part. The long stroke part is movable over a relative large range of movement with respect to a base support arranged to support the long stroke part. A shielding element (SE) is arranged between the short and long stroke parts. A position control system (PCS) maintains a substantially constant distance between the shielding element and the short stroke part.

Abstract: The invention discloses a pedestal apparatus for an article of furniture. The pedestal apparatus has an elongate post formation defining a first end and a second end and having a longitudinal axis. The post formation immovably supports a fixed foot arrangement and also movably supports a variable foot arrangement. The variable foot arrangement is selectively movable along and around the longitudinal axis for varying a longitudinal and angular proximity between the variable foot arrangement and the fixed foot arrangement. Biasing means are provided for controlling movement of the variable foot arrangement whereby, in use, the biasing means causes both the fixed foot arrangement and the variable foot arrangement to abut an underlying surface and thereby provide a substantial stabilization of the pedestal apparatus.

Abstract: A bicycle seat post assembly includes first and second tubes, which are telescopically arranged, a fluid chamber, which includes a compressible fluid to generate a force to expand the first and second tubes relative to each other, and a positioning structure. The positioning structure includes a support member on one of the first tube and the second tube, a positioning member that pivots about an axis between a first position and a second position, a control unit, which is connected to the positioning member to move the positioning member between the first position and the second position, and a position maintaining member, which is provided on the other of the first tube and the second tube. The position maintaining member includes an engaging portion that engages with the positioning member to maintain a positional relationship between the first and second tubes.

Abstract: A locking device includes an operating lever, a base and a repulsion generating member, wherein the operating lever has a releasing position and a locking position relative to the base, and the repulsion generating member is arranged between the base and the operating lever and generates a repulsion force for application to the operating lever during movement from the releasing position to the locking position. When the operating lever does not completely reach the locking position due to abnormal operation, the repulsion generating member will cause the operating lever to return to the releasing position thereby provide an indication. The locking device can thus provide an indication when the locking operation does not reach the correct position, thereby avoiding user confusion and abnormal operation.

Abstract: A hitch pin assembly for securing a shank member to a hitch receiver tube to minimize relative motion between the shank member and receiver tube, comprising an elongated pin having a threaded portion, a threaded nut, an elastomer piece, and a shank member which are mated for tightened engagement compressing the elastomer piece so as to firmly engage the receiver tube. The shank member may include a slot for a corresponding threaded nut and elastomer piece so when the pin is tightened, the nut compresses the elastomer against the interior wall of the shank surface and upwardly, thereby restraining movement of the threaded nut and dampening movement of the shank inside the hitch receiver tube.

Abstract: A height adjustable seatpost assembly is provided with first and second tubes, a ratchet mechanism and a drive source. The first and second tubes are telescopically arranged. The ratchet mechanism includes a ratchet tooth structure and a pawl structure. The pawl structure is engaged with the ratchet tooth structure in a lock position. The pawl structure is movably coupled with respect to the ratchet tooth structure in a movable position such that the first and second tubes are movably arranged relative to each other in at least one axial direction of the first and second tubes. The drive source moves the pawl structure between the lock position and the movable position in response to operation of the drive source. The drive source further axially moves the first and second tubes relative to each other in response to operation of the drive source.

Abstract: A carriage assembly includes a cart with a bottom wall and a peripheral wall. A top side of the cart is open. The peripheral wall has a front side, a back side, a first lateral side and a second lateral side. The cart may contain a plurality of objects. A handle is attached to the cart. A rolling apparatus is coupled to the cart to facilitate the cart is rolled along a support surface. The rolling apparatus is positionable in a deployed position to elevate the cart a maximum distance above the support surface. The rolling apparatus is positionable in a retracted position to lower the cart to a minimum distance above the support surface. A lock coupled to the cart and is in mechanical communication with the rolling apparatus. The lock releases the rolling apparatus to facilitate positioning the rolling apparatus between the deployed position and the retracted position.

Abstract: Provided is an adjustable attachment apparatus, system and method, including in various example embodiments a block adapted to rotatably engage a ball portion of an arm, where the arm may be connected with a base that connects with a helical rotatable member. In various example embodiments the ball portion of the arm may “pop” in and out of the block when compressing fasteners in the block are loosened, and the ball portion of the arm may be locked in place by tightening the compressing fasteners, to position the arm and attached structures in any of a variety of positions. In various example embodiments the block may be rotatably mounted to a surface, and the base may be rotatably mounted to the arm, and the helical rotatable member may be pivotally mounted to the base. A plurality of arms may be connected together using one or more double-ended blocks.

Abstract: A modular desk system may include, a plurality of configurable components including a top panel, an all-purpose hook, a cup hook, a storage shelf, a connecting shelf, a connecting planter box, a connecting divider, a connecting platform, a desktop organization member, a channel, a kickstand base, a support frame, and methods of forming configuration assemblies from such components. The configuration assemblies of the modular desk system may be paired with and coupled to other desk units and/or furniture.

Abstract: The retractable shelf system allows for the compartmentalization of storage container. The system is integrated into the interior space of the storage container and includes a plurality of shelving units distributed along the length of the storage container. Each of the plurality of shelving units includes a platform, a storage shelf, a first pulley support assembly, and a second pulley support assembly. The storage shelf and the platform are positioned coincident and parallel to each other. Each of the pulley support assemblies includes a retraction mechanism and a cable through which the storage shelf is tethered to the platform; the retraction mechanisms are adjacently mounted to the platform while the cables are tethered to the storage shelf. Additionally, a first stopper and a second stopper are attached to the walls of the storage container and provide vertical structural support. The system may be positioned in a functional or retracted configuration.

Abstract: A locking equipment rack for a backpack blower is presented. The locking equipment rack is adjustable to store a variety of blower models. The equipment rack securely stores the blowers, preventing vibrational damage and theft.

Abstract: The present application relate to an item of furniture, in particular a table, having at least one length-adjustable leg (15, 15.1, 15.2). The length-adjustable leg (15, 15.1, 15.2) includes a first telescopic element (2, 2.1, 2.2) which is realized as a hollow body, as well as a second telescopic element (3, 3.1, 3.2) which is mounted inside the first telescopic element (2, 2.1, 2.2) so as to linearly displaceable along a first axis (A). A locking device (16) which is arranged on the second telescopic element (3, 3.1, 3.2) comprises at least one first pin (17) which is movable by means of an actuating device (28) from a first position, in which the at least one first pin (17) prevents the movement of the first telescopic element (2, 2.1, 2.2) relative to the second telescopic element (3, 3.1, 3.2) as a result of a force-fitting connection or form-fitting connection, into a second position in which the displacement is not prevented.

Abstract: The disclosed article of furniture comprises a table with an adjustable base, a support, and a worksurface. The table can be deployed in a generally upright position for use and can be folded into a compact form for storage. The worksurface is mounted on an arm coupled to the base and is rotatable relative to the arm. The arm may be folded into the support. The support may be folded into the base. The worksurface may fit within a cavity between the legs of the base when the table is in the stowed position. The worksurface may have a height adjustment mechanism for the worksurface. The height adjustment mechanism may be configured to adjust to a predetermined “home” position when the support is folded into the base for the stowing position.

Abstract: A height adjustable work surface is provided, which includes an L-shaped frame supporting a cantilevered platform adapted to support computer and work space items thereon. The frame includes an upstanding rail portion and a horizontal base support, whereby the rail portion slidably supports a work surface platform above the base support. The rail portion and base support are U-shaped members, whereby a first and second rail is provided to support the work space platform. Cam locks are provided to lockably secure the platform in a given position, whereby the platform will not freely slide until unlocked and will support load thereon. An internal spring mechanism biases the platform to reduce lifting load requirements during adjustment of the platform. Overall, the device provides a means to adjust the elevation of work surface for a seated or standing user.

Abstract: Disclosed is an engagement assembly for releasably engaging a rigid member, including a rotating member that releasably engages the rigid member to prevent movement of the rigid member in at least one direction by friction. The rotating member is forced by a biasing element to selectively engage the rigid member, preventing retraction of the leg and inhibiting extension of the leg. A control release interacts with the biasing element, providing a releasable engagement of the rotating member with the rigid member.

Abstract: A booster structure of legs contains a support plate including four posts disposed at four corners of a bottom end thereof respectively. Each post includes a plurality of recesses having a vertical sliding section and a number of horizontal retaining sections perpendicular to the vertical sliding section. Each of a plurality of vertical moving units, including includes an inner stem and an outer stem, with the outer stem including a bottom cover. A bolt element is inserted and slides between the inner and outer stems. The bolt element includes a straight sliding section and a number of engaging sections perpendicular to the straight sliding section and includes a resilient element, a button, and a lip. The button is disposed on one side of the outer stem so that the bolt element is forced by the button to slide horizontally and return to its original position.

Abstract: Disclosed is an engagement assembly for releasably engaging a rigid member, including a rotating member that releasably engages the rigid member to prevent movement of the rigid member in at least one direction by friction. The rotating member is forced by a biasing element to selectively engage the rigid member, preventing retraction of the leg and inhibiting extension of the leg. A control release interacts with the biasing element, providing a releasable engagement of the rotating member with the rigid member.

Abstract: Disclosed is an engagement assembly for releasably engaging a rigid member, including a rotating member that releasably engages the rigid member to prevent movement of the rigid member in at least one direction by friction. The rotating member is forced by a biasing element to selectively engage the rigid member, preventing retraction of the leg and inhibiting extension of the leg. A control release interacts with the biasing element, providing a releasable engagement of the rotating member with the rigid member.

Abstract: An adjustable display board system comprises a display board, first and second grippers, first and second racks, and a handle. The first and second grippers are coupled to the display and include a plurality of teeth. The first and second racks are mounted to a rigid structure and include a plurality of teeth generally greater than the number of teeth of the first and second grippers. The teeth of the first and second grippers mesh with the teeth of the first and second racks to maintain the vertical position of the display board. The handle is pushed to disengage the grippers from the racks and allow vertical motion of the display board. The adjustable display board system also comprises a display board, a linear actuator unit, and one or more pivot arms. The linear actuator unit includes a movable actuator rod and is coupled to the one or more pivot arms, which in turn is coupled to the display board. Motion of the actuator rod is converted to raising and lowering of the display board.

Abstract: A work bench. The work bench includes a table top, a plurality of legs connected to the table top, and a leg length adjustment mechanism positioned on at least one of the plurality of legs. The leg length adjustment mechanism includes a threaded rod configured to rotate about a rod axis, and a leg adjustment member moveable between a first position where the leg adjustment member threadedly engages the threaded rod and a second position where the leg adjustment member is removed from the threaded rod. Rotation of the threaded rod about the rod axis results in axial movement of the threaded rod when the leg adjustment member is in the first position. The threaded rod is freely moveable along the rod axis when the leg adjustment member is in the second position.

Abstract: A table in accordance with the present disclosure includes a table top and first and second leg units. Each leg unit is mounted for movement relative to the table top from a closed position alongside the table top to an opened position extending away from the table top.

Abstract: Proposed is a length-adjustable, in particular, height-adjustable support 1 with a tube profile 4 preferably designed as cylinder profile, a telescopic support column 8 guided in the tube profile 4, and a spindle rod 11 which is guided in the support column 8 via a motion thread and mounted in a rotatable manner in the tube profile 4 in a free end area of the spindle rod 11, projecting out of the support column 8, and secured against axial displacement relative to the tube profile 4 via locking means. Locking means 25 are designed to block the radial rotatability of the spindle rod relative to the tube profile 4.

Abstract: Apparatus for adjusting the longitudinal and angular position of a work surface support leg is disclosed. The leg passes through a channel in a cap held via a spring and pin to a base. The leg's angular position is adjusted by rotating the cap, moving a tooth through a series of mating depressions, while the longitudinal position is adjusted by moving the leg with a series of notches that mate with a locking tooth in the cap. A knob interfaces with the cap via a rotary cam having high and low steps and a matching cam rider. The low step allows separation between the cap and base and the high step locks the cap to the base, thereby locking in the adjustment setting for the leg. The invention affords superior convenience when making angular and longitudinal leg adjustments, especially for people with physical handicaps.

Abstract: An adjustable lectern includes a base portion having a tubular upstanding base member and a tubular upstanding tower member that is mounted in a telescoping arrangement with respect to the base member. The base member and the tower member are each respectively formed as rigid tubes or channels by a single, unitary piece of material such as sheet metal. The lectern further includes a work platform that is positioned at an upper end of the tower portion. The work platform is both vertically and horizontally adjustable with respect to the base portion, so that both users who will be standing behind the lectern making a presentation and users who will be sitting behind the adjustable lectern in a wheelchair when making a presentation may be accommodated. Both the work platform and the base member include industry-standard rackmount structure for facilitating integration of electronic components.

Abstract: An elevating mechanism is mounted on a woodworking bench for adjusting a cutting depth of a milling cutter. In the elevating mechanism, two curved arms are pivotally turnably connected at proximal ends to and between two frame members. When it is desired to clamp or release the milling cutter via the two curved arms, a compression spring provided between two distal ends of the two curved arms allows the two curved arms to be pushed against or pulled from the milling cutter via an adjusting lever at reduced force.

Abstract: A mounting device includes a vertically movable mounting table for mounting thereon a target object and a rotational driving mechanism for rotating the mounting table within a predetermined angle. The mounting table is vertically raised and rotated by the rotational driving mechanism. The rotational driving mechanism includes a driving shaft extending in a tangential direction of the mounting table and a moving body moving in the tangential direction via the driving shaft. A first cam follower is attached in perpendicular to the moving body and a second cam follower is extending horizontally from an outer circumferential surface of the mounting table so as to be in contact with the first cam follower. Also, a resilient member connecting the mounting table and the moving body brings the first cam follower and the second cam follower into elastic contact with each other.

Abstract: Apparatus and system for leveling a playing surface on a table, such as a billiards or pool table, which utilizes a plate which supports the playing surface and which is tiltable about an x and y-axis for maintaining contact with the playing surface regardless the angle of the surface relative to the frame. Further, the apparatus is height adjustable to assist with leveling the playing surface in engagement with the plate of the leveling apparatus. Leveling apparatus are also provided between the legs of the table and the frame and which can be pre-leveled before positioning the playing surface to minimize the amount of leveling required to level the playing surface relative to the frame.

Abstract: An angularly adjustable keyboard support bracket includes a mounting rack attached to a desktop, a movable arm coupled with the mounting rack through a pin, and a bracing rack coupled with another end of the movable arm through another pin for holding a tray. A rotary mechanism is located between the bracing rack and the tray to enable the tray to swivel to the left side and the right side for a selected angle relative to the bracing rack to provide users with a desired operating angle.

Abstract: A table has an adjustable support wherein the ratchet mechanism that locks the position of the tray with respect to the base may be moved to the unlocked position with the user's leg while the tray of the table is held by the user's hands. The table may also have a locking detent that extends entirely across the width of the support leg attached to the tray of the table to provide a strong, secure, and stable support when the table is used with heavy objects.

Abstract: A shelf stores items and provides for organized and attractive display with ease of item access. Conforming to a defined physical environment or variable storage space optimally requires the shelf to provide for both vertical and horizontal adjustment. Here this is accomplished by a pair of legs that are telescopic (to reduce size) and can be locked at a height (vertical adjustment) by use of a pawl, pin, screw or other fastener known in the art. The shelf includes a planar surface that is comprised of a shelf portion, which is supported on each distal end by a leg extension. The leg extensions are mounted to the upper area of the legs. The leg extensions are received by the shelf portion, being movably mounted thereto. This allows for horizontal (width) adjustment. An end cover can be used to provide a flat surface that is consistent with the upper surface of the shelf portion.

Abstract: A height adjustable table, preferably with a circular tabletop which includes a vertically telescoping column to support the tabletop and with the column telescoping between extended and retracted positions. A base supports lower end of the column vertically upright. A locking mechanism is provided within the telescoping column adapted to lock the column against telescoping when the tabletop is rotated in one direction relative the base and to unlock the column when rotated in the other direction. When the table is unlocked, a user may adjust the height of the table either by manually lifting alone or assisted by a lifting mechanism to bias the tabletop upwardly and at least partially bear the weight of the tabletop. A stop mechanism is preferably provided to ensure the table is not extended so far as to disengage the tabletop structure. The base of the table is adapted to be engaged by a user's feet to prevent rotation relative to the tabletop when locking or unlocking.

Abstract: A supporting assembly includes a mounting seat secured to an object, an inner connecting member having a first end pivotally connected to the mounting seat, an outer connecting member having a first end pivotally connected to the mounting seat by an axle, a wrist member pivotally connected to a second end of the inner connecting member and a second end of the outer connecting member, and a supporting plate pivotally connected to the second end of the outer connecting member and the wrist member. A spring is mounted around the axle and includes a first end attached to the mounting seat and a second end attached to the outer connecting member. A pressing portion of the inner connecting member presses against a stop of the inner connecting portion.