| 摘要 |
A vertically adjustable, armrest includes a tubular support constructed for attachment to a chair, an armrest assembly telescopingly positioned in the tubular support, and a height adjustment mechanism slidably received in the armrest assembly. The armrest assembly includes a sleeve and a post. The sleeve includes an opening adapted to receive an operative member on one side. The post includes positional detents extending down the length of a first vertical surface. The height adjustment mechanism includes an actuator rod, an operative member, a locking member, and a resilient member. The actuator rod includes an angled ramp, an inclined surface, and a pair of angled surfaces and the locking member includes teeth which selectively mate with the post detents, an inclined surface, and at least one pair of lateral followers. The actuator rod operatively engages the locking member with the inclined wedge mateably engaged with the inclined surface and the angled surfaces slideably engaged with the lateral followers. To vertically adjust the armrest, the operative member is lifted upward, causing the resilient member to compress and the teeth of the locking member to disengage from the detents. To reengage the teeth with the positional detents, the operative member is released.
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