| 摘要 |
PURPOSE:To improve hooking ability of a hooker, by a method wherein a ring spring is set in a hole of the female hooking device in which the spring can freely work. CONSTITUTION:A magnetic plate 2 is stuck on the end surface of a pole of a permanent magnet 1 so that a hole 1a of the permanent magnet 1 is blocked. The strong magnetic plate 2 is fixed by stoppers 3b-3b of a cylinder cover 3 that has a smaller hole 3a than that of the hole 1a. At the same time, stopper elements 4a-4a of a fixing plate 4 are folded and fixed into the hole 1a, and they are further fixed into a supporting cylinder frame 6 so that the play is formed between the edge of the hole 3a and a ring spring 5. Thus, the capacity of the hooker is extremely improved. |
