| 摘要 |
<p>An adjustment mechanism includes a first plate, a second plate having first teeth, and a locking mechanism including a pawl having a post and second teeth. The pawl is movable between a locked position, an unlocked position, and an intermediate position between the locked position and the unlocked position. The second teeth are in engagement with the first teeth when the pawl is in the locked position and are disengaged from the first teeth in the unlocked position and in the intermediate position. A cam is rotatably supported between the plates and moves the pawl between the locked position, the unlocked position, and the intermediate position. A control ring has an inner surface that slidably receives the post when the pawl is in the unlocked position and a recess that receives the post when the pawl is in the locked position or the intermediate position.</p> |
