Patent ID: 7387341

Claim:
An armrest, comprising: a fixing board having a first face formed with a plurality of positioning holes; a first movable board movably mounted on the first face of the fixing board; two limit plates secured on the fixing board to limit and guide movement of the first movable board; a second movable board movably mounted on the first movable board and having a receiving chamber; a positioning body movably mounted in the receiving chamber of the second movable board and detachably positioned in one of the positioning holes of the fixing board; a restoring spring mounted in the receiving chamber of the second movable board and biased between the positioning body and the first movable board to push the positioning body away from the fixing board; a lining secured on the second movable board to move the second movable board; a foam body secured on the lining to move the lining; a push button movably mounted between the lining and the second movable board and movable between a first position where a bottom face of the push button is rested on the positioning body to push the positioning body toward the fixing board so that the positioning body is closely positioned in one of the positioning holes of the fixing board and a second position where the positioning body is retracted into a receiving hole of the push button by a restoring force of the restoring spring and is detached from one of the positioning holes of the fixing board; a bottom cap secured on a bottom of the lining to move with the lining; two shading plates mounted between a second face of the fixing board and the bottom cap to move with the bottom cap.