| 摘要 |
PURPOSE: To stabilize a contact state by providing a fixed contact portion over a prescribed angle range on the circumferential side of a key portion and providing a moving contact portion received withdrawably while spring- urged radially inwardly. CONSTITUTION: An inner cap 19 is fitted to the outer cylinder member 16 of a key switch 2 and an auxiliary cap 21 is fitted to the inner cap 19. A conductive supporting plate 25 is stored in a recess 24, a terminal 10 is stored through a coil spring 28, and a concave contact portion 27 is formed at the idle end of the terminal 10. A terminal holder 33 made of a synthetic resin is fastened to the base of a key body 6. In addition, a pair of terminals 9 forming arcs in symmetrical positions at an equal pitch is fastened to the peripheral side of the holder 33 in a manner that allows them to contact the contact portions 27. |
