A height-adjustable frame comprises a first leg element with a first support section, a first foot section and a first adjustment arrangement and a second leg element with a second support section, a second foot section and a second adjustment arrangement. The first support section and the first foot section can be moved relative to each other by means of the first adjustment arrangement. The second support section and the second foot section can be moved relative to each other by means of the second adjustment arrangement. The first leg element can be pivoted about a first pivot axis and the second leg element can be pivoted about a second pivot axis. The frame also has a locking structure and a rotatable shaft arranged between the first leg element and the second leg element to synchronously drive the first adjustment arrangement and the second adjustment arrangement. The shaft comprises a middle section, a first end section pivotable towards the middle section about a first joint axis and a second end section pivotable towards the middle section about a second joint axis. The locking structure locks the first leg element and the second leg element in a folded-out position when the joint axes do not run at least approximately parallel to the pivot axes or, in particular, at least approximately coincide. The locking structure can be unlocked when the joint axes run at least approximately parallel to the pivot axes and, in particular, at least approximately coincide so that the first leg element and the second leg element can be pivoted into a folded-in position.

A height-adjustable desk with a single motor and extending cross beam, comprises a desktop board, hollow tube components and a single motor; the hollow tube components and the single motor are provided below the desktop board, ends of the hollow tube components are connected with hexagonal screws; one end of the hexagonal screws is connected with the single motor, and the other end of the hexagonal screws is connected with a drive gear; retaining mechanisms with threaded sleeves are provided at both ends of the hollow tube components. The invention controls the motor to rotate through power, to drive the hexagonal screws and gears inside the supporting legs on both sides through the hexagonal screws, driving threaded lifting rods and realizing electric height adjustment. The unlocking of hollow tube components and hexagonal screws realize the supporting legs to move inwardly or outwards, controlling the desktop board's length.

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 electric table stand, a coupling thereof, and an electric table with the electric table stand; the electric table stand includes a holder, two support legs, and a transmission apparatus. The two support legs are detachably connected to two ends of the holder and parallel to each other. Each of the support legs includes a screw rod and a first transmission shaft driving the screw rod to rotate. The transmission apparatus is assembled in the holder, and includes a motor, a second transmission shaft driven by the motor and at least one coupling. The coupling includes a first joint connected to the first transmission shaft, a second joint connected to the second transmission shaft, and a flexible body flexibly pushing the second joint to be correspondingly connected to the first joint.

A lifting desk is related to fields of lifting desks. The lifting desk includes a drive device, a gearbox, a desktop, a crossbeam, and a lifting column, the crossbeam being connected to the desktop, the lifting column being connected to the crossbeam, the gearbox including a gear assembly, the drive device being in driving engagement with the gear assembly, the gear assembly being in driving engagement with the lifting column; the lifting desk further includes a retaining plate, the retaining plate being securely connected to the desktop, the gearbox being connected to the retaining plate. The desk offers an advantage that the structure disclosed may enhance assembly precision of the lifting desk and enables lifting control of the desktop.

A lifting holder structure contains a base and a moving rod, and the base includes plural fitting sleeves which are fitted together, the moving rod includes a first screwing post arranged on a bottom end thereof and fitted into a second screwing post via a lowermost of the plural fitting sleeves. The second screwing post and the plural fitting sleeves are fixed via an interstitial connecting structure, and a top of the second screwing post is limited by a driving post within an angle range and is driven by an angular coupling structure, such that the driving post rotates to drive the second screwing post and a first screwing post to change a pitch stroke, thus moving a lifting holder vertically.

Height adjustable angled desks are disclosed herein. An example height adjustment system includes a drive system including: a worm gearbox; a motor operatively coupled to the worm gearbox to drive the worm gearbox; and an output shaft operatively coupled to the worm gearbox, the output shaft extending in a first horizontal direction; and an interconnection gearbox coupled to the drive system, the interconnection gearbox to convert rotation of the output shaft to rotation of an interconnection shaft in a second horizontal direction different than the first horizontal direction, the interconnection gearbox including a first cover coupled to a second cover of the worm gearbox, the output shaft extending through the interconnection gearbox.

Example height adjustable desks are disclosed herein. An example height adjustable desk includes telescoping legs, each telescoping leg including an upper section, a lower section, and an actuator, each telescoping leg having a first end and a second end; a drive system having a motor and a worm gear assembly having a worm and a worm wheel; gearboxes, each gearbox coupled to a respective telescoping leg; transmission shafts connected to the drive system and to the gearboxes wherein the drive system is configured to drive the transmission shafts to drive the telescoping legs together to raise and lower; and a desktop having work surfaces including a first work surface, a second work surface, and a third work surface, the first ends of the telescoping legs to interface with and support the desktop, wherein the desktop is formed by coupling two or more of the work surfaces.

Height adjustable angled desks are disclosed herein. An example height adjustment system includes a drive system including: a worm gearbox; a motor operatively coupled to the worm gearbox to drive the worm gearbox; and an output shaft operatively coupled to the worm gearbox, the output shaft extending in a first horizontal direction; and an interconnection gearbox coupled to the drive system, the interconnection gearbox to convert rotation of the output shaft to rotation of an interconnection shaft in a second horizontal direction different than the first horizontal direction, the interconnection gearbox including a first cover coupled to a second cover of the worm gearbox, the output shaft extending through the interconnection gearbox.