Patent ID: 7188907

Claim:
An armrest assembly, comprising: an upright armrest support; a support member mounted on the armrest support; a slide member movably mounted on the support member and movable relative to the support member in a first direction; and an armrest movably mounted on the slide member and movable relative to the slide member in a second direction perpendicular to the first direction; wherein: the support member has a top face formed with a plurality of longitudinally arranged upwardly extending guide posts and provided with at least one hollow elastic plate formed with an arc-shaped slot to receive a roller which is partially protruded outward from the arc-shaped slot of the support member; the slide member is formed with a plurality of longitudinally arranged elongated guide slots, and the guide posts of the support member are slidably mounted in the guide slots of the slide member so that the slide member is movably mounted on the support member; the slide member has a bottom face formed with a plurality of longitudinally arranged arc-shaped positioning grooves each parallel with the guide slots, and the roller of the elastic plate of the support member is detachably positioned in any one of the positioning grooves of the slide member so that the slide member is detachably positioned on the support member; the slide member has a top face formed with a plurality of transversely arranged upwardly extending slide posts and provided with at least one hollow elastic plate formed with an arc-shaped slot to receive a roller which is partially protruded outward from the arc-shaped slot of the slide member; the armrest includes a lower armrest plate movably mounted on the slide member, and an upper armrest plate secured on the lower armrest plate; the lower armrest plate of the armrest is formed with a plurality of transversely arranged elongated slide slots each perpendicular to the guide slots of the slide member, and the slide posts of the slide member are slidably mounted in the slide slots of the armrest so that the armrest is movably mounted on the slide member; the lower armrest plate of the armrest has a bottom face formed with a plurality of transversely arranged arc-shaped positioning grooves each parallel with the slide slots, and the roller of the elastic plate of the slide member is detachably positioned in any one of the positioning grooves of the lower armrest plate of the armrest so that the armrest is detachably positioned on the slide member.