Abstract: An adjustable armrest includes a post and an armrest body. A sliding member is coupled to the post and has a non-circular contour on a horizontal plane. The armrest body receives a sliding seat. The sliding seat includes a track extending in a length direction. The sliding member is received in the track. The armrest body is movable relative to the post. The track includes a first section and a second section interconnected to the first section. The first and second sections are arranged in the length direction. The first section extends along a rectilinear line. The second section extends along a non-rectilinear line.

Abstract: A rotary positioning device for an armrest includes a positioning member, a base, a sliding member, and a detent member. The positioning member includes a plurality of first engaging recesses formed at a side edge thereof. The base is rotatably connected to the positioning member. The sliding member is slidably arranged in base and is selectively switchable between a locked position and an unlocked position. The detent member is movably arranged in the base and is selectively engaged with one of the plurality of first engaging recesses to correspond to the locked position or the unlocked position of the sliding member.

Abstract: A quick assembly armrest connecting device includes a connecting head and a receiving seat. The connecting head includes a body extending along a first axis. The receiving seat includes a groove extending along a second axis. The armrest connecting device is movable between an assembled position and a separated position in which the connecting head is separated from the receiving seat. When the armrest connecting device moves from the separated position towards the assembled position, the first axis is parallel to the second axis, and the connecting head moves rectilinearly along the second axis towards the receiving seat and inserts the body into the groove. After the connecting head abuts the bottom side of the groove, the connecting head moves rectilinearly in a radial direction of the second axis relative to the receiving seat, moving the armrest connecting device to the assembled position.

Abstract: An armrest assembly includes a base, an arm support, and a connector. The base includes a connecting portion and an installing portion formed at two opposite ends thereof. The installing portion is adapted for installing to a chair. A first surface at one end of the connecting portion is opposite to the installing portion. The arm support is supported on the base and includes a second surface faced to the first surface of the base. A cavity is defined in one of the first and second surfaces. An engaging member is formed on the other of the first and second surfaces and pivotably received in the cavity between an unlocked position and a locked position. A connector is received in the cavity of the arm support and engaged with the engaging member. The arm support is fixed to the base in the locked position.

Abstract: An armrest assembly includes a base, an arm support, and a connector. The base includes a connecting portion and an installing portion formed at two opposite ends thereof. The installing portion is adapted for installing to a chair. A first surface at one end of the connecting portion is opposite to the installing portion. The arm support is supported on the base and includes a second surface faced to the first surface of the base. A cavity is defined in one of the first and second surfaces. An engaging member is formed on the other of the first and second surfaces and pivotably received in the cavity between an unlocked position and a locked position. A connector is received in the cavity of the arm support and engaged with the engaging member. The arm support is fixed to the base in the locked position.

Abstract: An armrest includes a base and an arm support. The base has a connecting portion and an installing portion. A first surface at an end of the connecting portion is opposite to the installing portion. The arm support is adapted to assemble with the base, and the arm support is pivotable with respect to the base. The arm support includes a second surface abutting the first surface, with a cavity defined in one of the first and second surfaces. An engaging member is pivotally received in the cavity in a single pivoting direction from an unlocked position to a locked position. The arm support is fixed to the base in the locked position.

Abstract: An armrest assembly includes a stationary tube for attachment to a chair. The stationary tube includes recesses in an internal face. A movable tube is inserted in the stationary tube. The movable tube includes an aperture. An armrest is installed on the movable tube. A detent can be inserted into one of the recesses of the stationary tube through the aperture of the movable tube. A rod is inserted in the movable tube. The rod defines a recess for receiving the detent. The recess of the rod includes a shallow portion and a deep portion. A lever is connected with the rod and installed on the armrest in order to move the rod so as to control the detent.

Abstract: An armrest assembly includes a stationary tube for attachment to a chair. The stationary tube includes recesses in an internal face. A movable tube is inserted in the stationary tube. The movable tube includes an aperture. An armrest is installed on the movable tube. A detent can be inserted into one of the recesses of the stationary tube through the aperture of the movable tube. A rod is inserted in the movable tube. The rod defines a recess for receiving the detent. The recess of the rod includes a shallow portion and a deep portion. A lever is connected with the rod and installed on the armrest in order to move the rod so as to control the detent.