| 摘要 |
A latch of the pull-up type for a cabinet door is latched and unlatched by turning the latch in one direction or the other. When the door is in latched position, rotating the latch 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 sleeve cam having cam slots is moved rotationally to present inwardly sloping cam surfaces to opposite ends of a cross pin which is mounted on the shaft and which functions as a cam follower. The shaft is prevented from rotating on its own axis until the cross pin, which also functions as a motion-control pin, is moved axially inwardly a sufficient distance to escape from axial motion-control slots provided in a motion-control sleeve which is mounted coaxially on the shaft. When the motion-control pin reaches the inward ends of the axial motion-control slots, the opposite ends of the cross pin are able to move laterally into lateral motion-control slots provided in the motion-control sleeve, thereby to allow the shaft and the latch pawl to move pivotally out of the way of the cabinet frame. To latch the door, the action described takes place in reverse order.
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