Patent ID: 7568766

Claim:
An armrest device comprising: an armrest mount including a parallel pair of first limiting plates, and an aligned pair of non-circular first latch holes formed through said first limiting plates, respectively; an armrest member extending between said first limiting plates and rotatable relative to said armrest mount about a pivot point; a pair of latch members, each of which extends through said armrest member and into a respective one of said first latch holes, said latch members being movable toward each other from a locking position, where each of said latch members engages a hole periphery of the respective one of said first latch holes to arrest movement of said armrest member relative to said armrest mount, to an unlocking position, where each of said latch members is disengaged from said hole periphery of the respective one of said first latch holes to permit movement of said armrest member relative to said armrest mount; an urging unit disposed between said latch members for biasing said latch members away from each other to the locking position; and an armrest button mounted movably on said armrest member, and operable to move along a button axis transverse to the pivot axis for driving movement of said latch members from the locking position to the unlocking position against an urging action of said urging unit.