A variable height platform system comprises a frame assembly, at least two leg assemblies, a drive mechanism, and a sensor. The frame assembly is configured to support and be removably connected to a tabletop. The drive mechanism is configured to either extend or retract each leg assembly in a direction substantially perpendicular to the longitudinal axis to set a height of the frame assembly in an elevated position for use. The sensor is configured to sense position and movement of a user in a predetermined area including an area of the variable height platform system and an area proximate the variable height platform system. The controller is operatively connected to the sensor and drive mechanism. The controller is configured to operate the drive mechanism in response to the sensor sensing the position and movement of the user in the predetermined area.

A lifting device includes a guide unit, a support unit and a lifting unit. The guide unit is extendable and retractable along a direction. The support unit is disposed in the guide unit and includes a securing connector fixed to a seat body and made of elastic material, a support tube connected to the securing connector, and a support member disposed on the support tube. The lifting unit includes a first rod-actuating screw member disposed on the support member and having a first threaded hole, and a threaded rod unit including a first threaded rod extending into the support tube and being threadedly engaged with the first threaded hole, such that the first threaded rod is rotatable by an external force and movable in the direction.

A power-driven table stand with combining mechanotronics includes: a horizontal bar structure (10); a pair of supporters (20), connected at two sides of the horizontal bar structure (10); a pair of vertical post structures (30), connected to each of the supporters (20) and having a motor (31); and an electrical device (40), having a controller (41) and a guide wiring (45), wherein the controller (40) is disposed on the horizontal bar structure (10), the guide wiring (45) is stored and hidden in the horizontal bar structure (10) and each of the supporters (20), and electrically connected to the controller (41) and the motor (31). Accordingly, power wires and signal wires can be effectively and properly stored and hidden.

A power-driven table stand with combining mechanotronics includes: a horizontal bar structure (10); a pair of supporters (20), connected at two sides of the horizontal bar structure (10); a pair of vertical post structures (30), connected to each of the supporters (20) and having a motor (31); and an electrical device (40), having a controller (41) and a guide wiring (45), wherein the controller (40) is disposed on the horizontal bar structure (10), the guide wiring (45) is stored and hidden in the horizontal bar structure (10) and each of the supporters (20), and electrically connected to the controller (41) and the motor (31). Accordingly, power wires and signal wires can be effectively and properly stored and hidden.

An electric table stand for simple assembly and adjustment includes a beam structure (10), support bars (20), and upright structures (30). Each of the support bars (20) includes a base (21) and a plurality of arms (211, 212, 213) extended from the base (21), wherein an accommodating space (A) is defined by the base (21) and the arms (211, 212, 213). One arm (213) of each of the support bars (20) supports one end of the beam structure (10), and the beam structure (10) is operatively moved in or out of the accommodating space (A). The upright structures (30) are connected to the support bars (20). Accordingly, it is easy to adjust and position each support bar (20) and each upright structure (30) on the beam structure (10).

An electric table stand for simple assembly and adjustment includes a beam structure (10), support bars (20), and upright structures (30). Each of the support bars (20) includes a base (21) and a plurality of arms (211, 212, 213) extended from the base (21), wherein an accommodating space (A) is defined by the base (21) and the arms (211, 212, 213). One arm (213) of each of the support bars (20) supports one end of the beam structure (10), and the beam structure (10) is operatively moved in or out of the accommodating space (A). The upright structures (30) are connected to the support bars (20). Accordingly, it is easy to adjust and position each support bar (20) and each upright structure (30) on the beam structure (10).

A modularized fast assembly lift desk includes a preassembled module, a matched module and a clamping member. The preassembled module includes a combined body formed by connection between a desktop platform and a transverse beam. The matched module includes a lift column including a motor housing. The clamping member includes a fixed connecting end and a movable squeezing end. When a user assembles the lift desk, the fixed connecting end of the clamping member is engaged with the preassembled module. The movable squeezing end of the clamping member is pressed to generate a squeezing force between the movable squeezing end and the motor housing. The motor housing and the preassembled module are fixedly connected to implement locking between the preassembled module and the matched module.

A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

Telescopable column, in particular for items of furniture, such as desks, comprising: at least two telescopic elements which can be displaced axially in one another in a telescope-like manner, and a sliding support between the at least two telescopic elements, wherein the sliding support comprises support bodies only in the region of a longitudinal end of an inner one of the two telescopic elements, the support bodies in each case having an abutment zone which forms a sliding surface and having an opposite abutment zone for fastening to the telescopic element, and being fastened to the outer side of the inner telescopic element without tools, and desk having same.