A frame for sit- stand-tables comprising a longitudinal member, two height-adjustable legs with at least two telescopic profiles, namely an outer and an inner profile, and with a driving mechanism, driven by a motor unit, comprising an electric motor and a gear. According to the invention the motor unit is arranged in the longitudinal member and connected to the driving mechanism in the height-adjustable legs. Thus, a frame with a simplified construction is achieved. The construction of the legs can be simplified and at the same time the dimensions can be reduced, as it is not necessary to take the building-in of a motor into the legs into consideration. As both legs are driven by a joint motor unit, the electric control can also be simplified as it will not have to drive the two legs synchronously.

A linkage mechanism acting in opposite directions synchronously disclosed in the invention comprises a driving part with an internal space and driven by an external power source; a first actuating part disposed in the internal space; and a second actuating part disposed in the internal space. When the first actuating part and the second actuating part are synchronously driven by the driving part, the first actuating part and the second actuating part are relatively displaced close to each other in opposite directions or away from each other in opposite directions. Thereby, with a linkage relationship between the first actuating part and the second actuating part that act in opposite directions, an efficacy of rapid displacement and actions can be achieved.

A height adjustable desk includes a work surface, a first telescoping leg, a second telescoping leg, a driving device, and a switch device. The first telescoping leg and the second telescoping leg are connected to the work surface, and are driven by the driving device to lift or low the work surface to any desired height. The switch device is mounted on the first telescoping leg to be activated when the work surface is moved to a predetermined position. The switch device will turn the motor off to stop the work surface when the switch device is activated.

A frame for sit-stand-tables comprising a longitudinal member (3), two height-adjustable legs (6, 7) with at least two telescopic profiles, namely an outer and an inner profile, and with a driving mechanism, driven by a motor unit (39), comprising an electric motor (46) and a gear. According to the invention the motor unit (39) is arranged in the longitudinal member (3) and connected to the driving mechanism in the height-adjustable legs (6, 7). Thus, a frame with a simplified construction is achieved. The construction of the legs (6, 7) can be simplified and at the same time the dimensions can be reduced, as it is not necessary to take the building-in of a motor into the legs into consideration. As both legs (6, 7) are driven by a joint motor unit (39), the electric control can also be simplified as it will not have to drive the two legs synchronously.

Height adjustable angled desks are disclosed herein. An example height adjustable table includes three legs, each of the three legs including an upper section, a lower section, and an actuator; a connection system to couple the three legs; a height adjust system including drive system; a first gearbox coupled to the drive system; second gearboxes coupled to respective ones of the actuators, the first gearbox and the second gearboxes to change a transmission direction; and transmission shafts connected to the drive system and to the first and second gearboxes; and wherein the drive system is configured to drive the transmission shafts to drive the legs together to rise and fall, and wherein the drive system includes a motor, a worm connected to the motor, and a worm wheel engaged with the worm.

An adjustable platform having an upper platform surface, at least two leg assemblies supporting the upper platform surface, and a drive mechanism that is configured to extend or retract the leg assemblies between a first position, in which each leg assembly is retracted to lower the platform toward ground, and a second position, in which each leg assembly is extended to raise the platform away from the ground. The drive mechanism includes a single motor that is drivingly coupled to each of the at least two leg assemblies, in which the drive mechanism is configured to simultaneously extend or retract both of the at least two leg assemblies between the first position and second position to thereby lower or raise the upper platform surface relative to the ground.

A workstation includes a partition unit to form a workspace, in which a desk board, two lifting apparatuses and a driving device are provided. Each of the lifting apparatuses has a first tubular member connected to a bottom of the desk board, a second tubular member fixed to the partition unit, and a lifting device to move the first tubular member relative to the second tubular member. The driving device is connected to the lifting devices to drive the lifting devices to move the first tubular members so as to lift and lower the desk board.

An adjustable platform having an upper platform surface, at least two leg assemblies supporting the upper platform surface, and a drive mechanism that is configured to extend or retract the leg assemblies between a first position, in which each leg assembly is retracted to lower the platform toward ground, and a second position, in which each leg assembly is extended to raise the platform away from the ground. The drive mechanism includes a single motor that is drivingly coupled to each of the at least two leg assemblies, in which the drive mechanism is configured to simultaneously extend or retract both of the at least two leg assemblies between the first position and second position to thereby lower or raise the upper platform surface relative to the ground.

A height-adjustable frame for furniture, such as a worktable or desk, is disclosed. The frame includes first and second height-adjustable leg elements pivotable about first and second pivot axes between folded-out and folded-in positions. A rotatable shaft is arranged between the first and second leg elements to synchronously drive first and second height adjustment arrangements. The shaft includes a middle section and first and second end sections pivotable towards the middle section about respective first and second joint axes. A locking structure is included that locks the first and second leg elements in a folded-out position, when the first and second joint axes do not run approximately parallel to the first and second pivot axes, and that unlocks when the first and second joint axes run approximately parallel to the first and second pivot axes to permit the first and second leg elements to pivot into a folded-in position.

A welding table with elevation system, powered with cordless drill, gear reducer, chain, sprockets and, ultimately turning screw posts synchronously, lifting four telescoping legs. Maximum elevated height exceeds most work benches for height matching, and a minimum height goes lower than most low tables. Folding wheel system is independent, lever operated, and works in conjunction with the elevation system. Once table rolls into position, drill is activated, braking is instant, the table lifts itself from the wheels. Wheels are then folded up, a position necessary during minimum height, as the frame gets closer to the ground. This low height enables sitting roll stool usage, and knees and legs enter the rear frame opening. Two drawers above conceal the wheels, have a lever locking system, and necessary when rolling the table. The table top is heavy, one piece removable with normal modular patterned holes throughout, and the addition of large oval holes, and top side overhang, both establishing C-Clamp usage.