Pushbutton switch

Abstract

A small and thin pushbutton switch is described. The outer periphery of an annular elastic plate (7) for covering the outer periphery of a metal contact (6) is caulked by a caulking wall (1b) of a housing (1), whereby the entire inner periphery of the annular elastic plate (7) is held in elastic contact with the outer periphery of the metal contact. Moreover, the tight contact between the metal contact (6) and the annular elastic plate (7) is maintained even when the metal contact (6) is pressed, and a high resistance to dust can be obtained. Still furthermore, the number of components is small and the reduction in size and thickness is not hindered.

Description

technical field [0001] The present invention relates to a thin-shaped small push button switch for connecting and disconnecting a metal contact (movable contact) in the shape of a substantially circular thin disk and a fixed contact. Background technique [0002] The existing such Figure 6 The structure push button switch shown is widely used. This existing push button switch is by using the insert molding technology, the inner bottom surface of the opening 10a on the housing 10 is exposed and formed with fixed contacts 11, 12 arranged in pairs, and these fixed contacts 11, 12 are formed. The external connection terminals 13 and 14 led out from 12 are exposed and formed on the outer wall surface of the housing 10 . The aforementioned opening portion 10a accommodates a metal contact 15 in the shape of a substantially circular thin disk, which is usually in contact with one fixed contact 11 and is opposite to the other fixed contact 12 so that it can be turned on and off. A...

AI Technical Summary

Problems solved by technology

[0006] However, if Image 6 In the previous prior art shown, since the end surface of the adhesive layer on the inner surface of the flexible thin plate 16 may be exposed around the housing 10, it is difficult to store and store this pushbutton switch on a carrier belt. When placing on the board, there is often a problem that the ultra-light pushbutton switch sticks to the carrier tape board, which in turn makes it difficult to carry out the actual installation work smoothly

In order not to adversely affect the action of the metal contact 15 when the flexible thin plate 16 is bonded to the top surface, this existing push button switch does not provide an adhesive on the inner surface of the flexible thin plate 16, but coats the inner surface of the flexible thin plate 16. When attaching an adhesive, the problem that the flexible thin plate 16 will be peeled off from the upper end surface of the housing 10 will occur due to the insufficient bonding strength of the adhesive.

[0007] Also, for Image 6 The button switch shown by the dotted line with two dots, the metal sheet 17 with the opening 17a is riveted on the flexible sheet 16 and the outer peripheral part of the housing 10, because it is attached with this metal sheet 17, and the parts The number and assembly process increase, which in turn increases the thickness of the product, so it cannot be considered as a good solution for making the product smaller and thinner and reducing the cost

[0008] Regarding the latter prior art of riveting the outer periphery of the metal contact on the riveted wall of the housing, since only the riveting conditions are different, the operating characteristics of the metal contact will change considerably, so it is necessary to The riveting operation is strictly controlled, which will inevitably complicate the riveting process and make it difficult to improve production efficiency.

Moreover, this existing push button switch cannot seal the opening on the housing with metal contacts, so foreign matter such as dust will invade the opening from the gap formed around the metal contacts when the extrusion operation is performed. part of the interior, it is difficult to achieve dustproof

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