| 摘要 |
<p>PURPOSE: To stabilize a contact state by forming a contact means of a fixed contact portion fixed in a key and a moving contact portion received withdrawably by a key switch while spring-urged radially inwardly by a spring means. CONSTITUTION: An inner cap 19 is fitted to the outer cylinder body 16 of a key switch 2, and an auxiliary switch 21 is fitted to the inner cap 19. A conductive supporting plate 25 is provided in a recess 24, a part of which is fastened to the auxiliary cap 21. The base of a terminal 10 is supported rotatably by a pivot erected in the plate 25 and a contact portion 27 is formed on the idle end side of the terminal 10. In addition, a compression coil spring 28 is provided in a groove 29 so that the contact portion 27 may be projected toward the center from the inside periphery of a hole 24, and the base end of the spring 28 is engaged with a terminal portion 31 connected electrically to a control unit.</p> |
