| 摘要 |
<p>A latch of the pull-up type for a cabinet door is latched and unlatched by turning the latch handle in one direction or the other. When the door is in latched position, rotating the latch handle in the unlatching direction initially causes a spring-biased shaft, which carries a latching pawl, to move axially inwardly. This inward movement of the shaft is permitted because a cam in the handle is moved rotationally to present downwardly sloping cam surfaces to opposite ends of a cam-follower pin which is mounted on the shaft near its outer end. The shaft is prevented from rotating on its own axis until a motion-control cross pin, which is also mounted on the shaft, is moved inwardly a sufficient distance to escape from axial motion-control slots in a support sleeve which is mounted on the door at an opening therein and through which the shaft passes. As soon as the motion-control pin emerges from the motion-control slots, it is able to move laterally into lateral arcuate motion-control recesses in the support sleeve, thereby to allow the shaft and the latch pawl to turn out of the way of the cabinet frame. To latch the door, the action described takes place in reverse order.</p> |
