Patent ID: 7556316

Claim:
An elevating structure for armrests comprising: an adjusting member; a rail member for slideably receiving said adjusting member therein, wherein both of the adjusting and rail members are assembled together in an armrest, with said adjusting member including a main part and an auxiliary part moveable relative to each other; with said main part having an engaging slot formed therein with a plurality of recesses, with a groove formed in said auxiliary part with a plurality of grooves corresponding to the plurality of recesses, wherein said auxiliary part includes a push button attached on a top end thereof and extending therefrom; a first spring received in the push button and abutting against said main part to push the auxiliary part downward, with each groove of said auxiliary part provided with an inclined pushing surface; said rail member slideably receiving said adjusting member and including a lock member pivotally mounted thereon about an axis; and a second spring pressing the lock member, wherein said lock member includes a lock projection parallel to and spaced from the axis and inserted into said rail member such that said lock projection is biased to engage with one of said locking recesses and be received in one of said plurality of grooves.