Abstract: A chair assembly includes a main body including an adjusting base, a support frame, and a backrest support rack. The support frame has two opposite sides each formed with a slide slot having a wall formed with a plurality of fixing holes and each having a first end formed with an arcuate positioning recess. The backrest support rack has a horizontal section provided with an adjusting rod slidably mounted in the slide slot and detachably locked in either one of the fixing holes and provided with a fixing rod detachably locked in the positioning recess. Thus, the chair assembly can function as the office chair and the computer chair, thereby enhancing the versatility of the chair assembly.

Abstract: A reclining chair has a control switch and a control device. The control device has a tube connected to a support frame, a joint disposed on a seat, a rod inserted through the tube and connected to the joint, a control thread connected to the control switch and a cylindrical block, an inner threaded socket disposed on the tube, a hollow cylinder disposed on a positioning mount, a compression spring inserted in the hollow cylinder, a positioning pin passing through the compression spring and the hollow cylinder, the hollow cylinder engaging with the inner threaded socket, a connector clamping a tail of the positioning pin, the control thread passing through an angle plate of the positioning mount, and the cylindrical block inserted in the connector.

Abstract: A chair includes a seat portion with legs and a backrest frame and a footrest are respectively pivotally connected to two opposite ends of the seat portion. Two rods are pivotally connected between the backrest and the footrest. A cylinder is connected to an underside of the seat portion and a piston rod of the cylinder is connected to an end of the backrest. A control lever is connected to the cylinder and controls the movement of the piston rod of the cylinder to pivot the backrest and the footrest.