Button switches

Abstract

The present invention provides a push-button switch with high contact reliability, which provides a desired operation feeling, and prevents the invasion of dusts and the like to stabilize the contact state between a movable contact and a fixed contact when a rubber spring is pushed to perform the verse operation. The push-button switch is characterized in having: a housing having a housing part, fixed contacts fixed in the housing part, a movable contact arranged opposed to the fixed contacts, and a rubber spring having a lower end peripheral edge part in the holding part bendable skirt part provided in a space formed together with an upper end pressing surface part, and contacts / disconnects the movable contact to / from the fixed contact due to the bending of this skirt part. The lower end peripheral edge part of the rubber spring and opposed faces of a housing wall part of the housing 1 having this lower end peripheral edge part held therein are formed of inclined faces or arc faces each opening from the under face side toward the top face side.

Description

technical field [0001] The present invention relates to the structure of a push button switch used as an operation switch of various electronic devices, and particularly relates to the structure of a push button switch using a rubber spring as a flip spring. Background technique [0002] The structure of the conventional push button switch is known in which a movable contact facing the fixed contact and a rubber spring pressing the movable contact to the fixed contact side are arranged in the housing portion of the housing on which the fixed contact is mounted. , using the ejection force of the rubber spring to reset the operating stem (for example, refer to Patent Document 1). [0003] The structure of the conventional push button switch will be described in detail below with reference to the accompanying drawings. [0004] Fig. 11 is a plan view showing a conventional push button switch. Figure 12 It is a cross-sectional view showing a conventional push button switch. ...

AI Technical Summary

Problems solved by technology

[0012] Therefore, there is a problem that the position of the rubber spring 35 in the housing wall portion 31b is shifted, which may cause the end of the rubber spring 35 to be pressed, which affects the operating feeling (operation snapping), or dust enters the contact from the gap G. internal, resulting in poor contact

In addition, when the outer peripheral edge portion 35c of the rubber spring 35 expands to overlap with the housing wall portion 31b when it is pressed in the gap G, the peak position of the driving force (the point where the rubber spring 35c bends and turns over) is added. ) is shifted to the rear (on the conduction position side of the contact), so the stroke after turning over is shortened, and a good operating feeling cannot be obtained

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