| 摘要 |
<p>Lock comprising a spring-latch (9) and a bolt (10), the spring-latch being actuatable against the biasing action of elastic return means (12) by means of an external lever (knob) or an internal lever (handle), the levers being rotationally rigidly coupled to respective coaxial hubs (22,23) rotatably supported at the sides of an element (17) for opening the spring-latch (9) which is pivoted coaxially to the hubs (22,23) and is intermediate thereto; the lock further comprises teeth for pulling the element (17) defined on the hubs (22,23), the teeth being able to pull the element (17) only in the direction for opening the spring-latch (9) by actuating one of the levers, means for the elastic return of the hubs (22,23) when the levers are released which are composed of a spring (45) which acts on tabs (39,40) of the hubs (22,23) with the interposition of a block (46) guided tangentially to the hubs; the block (46) can be orientated and is shaped so as to provide abutment only to the tab of the hub to which the inner lever is rigidly coupled. <IMAGE></p> |
