A rotating armrest apparatus includes a handle, a rotating device disposed at one end of the handle, an elevation adjustment device disposed at another end of the handle, and a rotatable armrest disposed on top of the elevation adjustment device.

A salon treatment assembly (10) for use by a user during a salon treatment, comprises a foot bath (16), a salon chair (14), and an adjuster assembly (20). The salon chair (14) supports the user during the salon treatment and is coupled to the foot bath (16). The salon chair (14) can have a chair body (31) including a seat support (28), and an arm rest (32A) that is movably coupled to the seat support (28). The adjuster assembly (20) selectively moves the arm rest (32A) relative to the seat support (28) such that the salon chair (14) is alternatively positioned in a closed configuration, wherein the arm rest (32A) is positioned directly adjacent to a forward portion (28A) of the seat support (28), and an open configuration, wherein the arm rest (32A) is not positioned directly adjacent to the forward portion (28A) of the seat support (28).

An armrest device for a chair includes a lower support rod that rises at a side of a chair seat and has a tubular upper end portion; and an upper support cylinder that has an armrest provided in an upper end thereof, is externally fitted to the lower support rod so as to be slidable in an up-down direction, and has a plurality of engaging portions therein. The armrest is made height-adjustable with respect to the lower support rod by disposing the locking member and a biasing member at an upper end portion of the lower support rod and providing the rotating rod inside the lower support rod.

An omnidirectional adjustment-oriented positioning device of an office chair armrest includes two parallel inner links pivotally connected between an armrest rotation fixing unit and a rotation base. The inner links are enclosed in outer links to form a parallel four-link swing link component. The rotation base is axially disposed at a pad. An armrest component capable of horizontal rotation and displacement is disposed at the armrest rotation fixing unit. Inner and external wheel components with bevel gears meshing with each other are disposed between upper ends of the outer links and the armrest rotation fixing unit. Positioning gears which mesh with each other are disposed at the armrest rotation fixing unit. A positioning wheel is mounted at the armrest rotation fixing unit and rotatable such that a rotation component for rotating the inner wheel component abuts against the inner wheel component and thus drives the positioning wheel to move outward.

An armrest that includes a mounting plate, a block member, and a link member. The link member has a first end and a second end that opposes the first end. The link member is engaged with the mounting plate at a first pivot toward the first end to pivot the link member at the first pivot and laterally move the second end. The link member is engaged with the block member at a second pivot toward the second end to pivot the block member at the second pivot and laterally move an end of the block member that faces the first end.

A foldable armrest, a sofa and a single chair are provided. The foldable armrest includes an armrest body. The armrest body includes an outer side plate and an inner side plate which may draw close to each other in a width direction of the armrest body. A width adjusting mechanism is connected between the outer side plate and the inner side plate. The width adjusting mechanism includes locking kits and at least one adjusting rod. The locking kits are connected with the inner side plate, the adjusting rods are connected with the outer side plate, and the locking kits and the adjusting rods are interlocked in the width direction of the armrest body.

A mechanism fixed under a cushion for adjusting an interval of two armrests is disclosed. The invention includes a base, an armrest support and a handle set. The base is a hollow body with a channel and has an elastic block with a central through hole. The armrest support has a connecting section slidably penetrating the channel. The connecting section is formed with a longitudinal through hole corresponding to the central through hole in position. The handle set is fixed under the base and includes a handle with a fixing bar and an opening; a presser received in the opening and has a fixing hole corresponding to the central through hole in position and an engagement trench for engaging with the fixing bar; and a bolt passing through the fixing hole, longitudinal hole and central through hole, and screwed with a nut to fasten the handle to the base.

The invention includes a connecting seat having a sleeve. A height adjustment rod is disposed in the sleeve and has two symmetric boards. Each of the boards is formed with recesses. A receiving room is formed between the two boards. An elevation rod is disposed in the sleeve. An end of the elevation rod has a projection received in the receiving room. Another end of the elevation rod has a connecting seat with a cylinder and a spring. An armrest set has a tube and an armrest connected atop the tube. The tube is received in the sleeve and sheathes the height adjustment rod and elevation rod. A top of the tube is formed with a channel for receiving a trigger. A fixing bar passes through the projection and is embedded into one of the recesses.

A mechanism fixed under a cushion for adjusting an interval of two armrests is disclosed. The invention includes a base, an armrest support and a handle set. The base is a hollow body with a channel and has an elastic block with a central through hole. The armrest support has a connecting section slidably penetrating the channel. The connecting section is formed with a longitudinal through hole corresponding to the central through hole in position. The handle set is fixed under the base and includes a handle with a fixing bar and an opening; a presser received in the opening and has a fixing hole corresponding to the central through hole in position and an engagement trench for engaging with the fixing bar; and a bolt passing through the fixing hole, longitudinal hole and central through hole, and screwed with a nut to fasten the handle to the base.

A chair assembly includes a seat support structure, a back support structure, a back tensioning assembly adjustable between low and high tension positions, an actuator assembly adapted to adjust the back tensioning assembly between the low and high tension positions, a control input assembly actuable by rotating the portion of the control input assembly, and a control link assembly operably coupling the control input assembly with the actuator assembly to adjust the back tensioning assembly between the low and high tension positions upon rotation of the portion of the control assembly by a seated user, wherein a number of rotations of the portion of the control input assembly is not limited by the control link.