| 摘要 |
An adjustment mechanism mounted in a chair for releasably locking one chair component in one of positions relative to a seat. The mechanism comprises a tube-like brace secured to underside of seat; a sliding member slideable in brace secured to one chair component and having lengthwise recesses; a guide member coupled to sliding member; a hook member having a lower end coupled to guide member and an upper bent end; a first member secured in brace including a notched member having curved members and a channel; and a second member secured in brace together with first member for receiving sliding member and hook member, a spring-loaded detent of second member being secured in a hole and having a portion projected from hole into one recess for engagement in an unused state. One chair component is operative to push down to cause bent end to move through channel in response to a disengagement of detent from one recess and pull up to lock in one of curved members with detent engaged with the other recess.
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