| 摘要 |
The device according to the invention is characterised in that it comprises a reinforcing bush 25 made of treated steel and designed to enclose the outer cylinder 16 and to be joined to a backplate 27 intended to be retained between the inner face of the leaf B and the closing plate 20 of the case 10 of the lock, and in that a fixed control lug 29 penetrating into the case is capable of retaining in the stand-by position a first blocking means L carried by the case and of releasing this blocking means L as a result of its breakage or its retraction towards a position, in which it is in engagement and immobilises a second blocking means L1 in an active position preventing the actuation of the locking mechanism 12. The invention is used for locks surface-mounted on a leaf, comprising at least one locking means. <IMAGE>
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