| 摘要 |
The device has a first lower substantially flat body (1), which has in its upper part a flexible post (11) with a narrowed or weakened portion (16) and a second upper body (2) with the passage (23) for receiving and securing said post (11). The flexible post (11), which has a rectangular cross section, has in its main surfaces respective mutually opposed toothings, which teeth (14a, 14b) are offset in the lengthwise direction and the passage (23) of the second body (2) has two latching pawls (21) mutually opposed, so that in the operative position of the devices, the teeth (14a, 14b) of the flexible post (11) engage in an alternate form with said latching pawls (21). The second body (2) has a bell like hollow form with a lower widened contact mouth or border (22). |
