| 摘要 |
PURPOSE:To hook and release a knob and a shaft by positioning automatically these knob and shaft in the prescribed directions. CONSTITUTION:A projection 4 is provided inside a knob main body 2. For a core 5, a female screw 6 is set from the lower side and at the same time a hole 7 for projection is formed at the side part. The projection 4 is put through the hole 7, and the main body 2 and the core 5 are set in a body. Thus a knob 1 is obtained. A male screw 9 is set at the tip of a shaft 8, and a hooking recess 10 is formed at the side of the screw 9. The knob 1 is screwed into the tip part of the shaft 8 and fixed with a screw, and at the same time the projection 4 of the knob 1 is hooked into the recess 10 of the shaft 8 in the direction where the shaft 8 is coincident with a pattern 3 of characters on the upper surface of the knob 1. |
