Patent ID: 7980632

Claim:
An armrest for a chair, comprising: a lower bushing with an engaging portion being formed on an end thereof, a side surface of the lower bushing defining a toothed rack hole, a plurality of teeth being formed at two opposite sides of the toothed rack hole; a upper bushing nesting the lower bushing therein and defining a through hole corresponding to the toothed rack hole, a supporting member being formed on an end of the upper bushing differing from an end of the upper bushing adjacent to the engaging portion; and a resilient ring shaped part received in the lower bushing, a button opposite to a through hole in the upper bushing being formed on the resilient ring shaped part, protruding out of the upper bushing from the toothed rack bole and the through hole, an H shaped latching portion being formed on the button and engaging with the teeth of the lower bushing.