| 摘要 |
<p>With a bicycle lock of the type having a blocking bar or a locking arm (10) mounted in a holding part (17) which is secured to the one leg (1) of the fork, the arm (10) can swing from a locked position, in which the arm is secured in an engagement part (18) secured to the opposite leg (2) of the fork, to a disengaged position. The locking arm (10) is mounted on a bush (8) which can turn and thus swing the locking arm for engagement with the engagement part (18)'s locking breech (16), wherein the latch (12) can engage with a groove (11) in the outer part of the locking arm (10). The lock can consist of a pair of metal canisters welded to each its fork leg and forming a housing for the remaining parts of the lock, and in the housing there can be provided a notch in which a ring of impenetrable material can be bedded. The actual locking arm (10) is free to rotate around its axis (20) in any position, which means that the arm can be turned without causing any damage, neither to the holding parts nor the locking parts. Moreover, since the lockingbreech (16) is completely enclosed within the locking block (13) in the engagement part (18), it is not possible to force or knock the locking arm out of the engagement part, in that the arm can be releaed only by an axial movement of the locking arm, and after the latch (12) has been turned out by means of the key (15). A possible housing will protect the internal parts of the lock, which can thus be made of moulding materials if desired, in that neither will the housing be capable of being sawn through, for example with a hack-saw.</p> |
