JPS59194235U - push button switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the housing of the push button switch of the present invention, Fig. 2 is a cross-sectional view taken along the line I-I showing only the essential parts, and Fig. 3 is an example of the spring holding member used in this. FIG. 1: Housing, 2: Housing bottom plate, 21: Projection, 3
: Key stem, 31: Recess, 32: Locking step, 35 Nislit, 4: Key top, 5: First contact spring assembly, 6:
Second contact spring set, 7: spring holding member, 71: bottom surface, 72: through hole, 73: support arm, 74: notch, 8: internal spring, 9: external spring.

Claims (1)

[Scope of utility model registration request] Two coil springs are built in concentrically, and in the first stage when the key top is pressed, the key stem descends while compressing its internal spring, operating the first contact spring set, and the following In the second stage, the key stem descends while also compressing the external spring to operate the second contact spring set.The push button switch has a through hole in the center of the bottom through which the internal spring passes, and its periphery An external spring holding member, on which four supporting arms with hook-shaped tips are erected, is locked to a locking step provided on the key stem, and an external spring holding member is secured between the bottom surface and the key stem. A notch is provided on the bottom surface of the external spring holding member to expose the end surface of the external spring, and the external spring is inserted into the notch on the top surface of the bottom plate of the housing of the push button switch so that the external spring is inserted as the key stem is lowered. A push button switch characterized by having a protrusion that compresses the air.