Push switch

Abstract

PROBLEM TO BE SOLVED: To provide a push switch having a two-step operation capable of stably providing operation feeling.SOLUTION: This push switch has: a casing 11 having a housing part 11S; a center stationary contact part 12, a first peripheral contact part 13, and a second peripheral stationary contact 14 which are disposed in the housing part; a first movable contact 17 which can be inversely operated by pressing operation, has a plurality of leg parts 17f and a dome part 17d having a hole 17h in the center thereof, and is brought into contact with the first peripheral stationary contact part and the second peripheral stationary contact part; and a second movable contact 18 which can be inversely operated by pressing operation, has a dome part 18, is placed on the first movable contact so as to cover the hole part, and can be brought into contact with and separated from the center stationary contact part. The first peripheral stationary contact part has at least two or more contact parts 15, the second peripheral stationary contact part has at least one or more contact parts 25, and a plurality of contact parts 15, 25 are disposed at three locations where the first movable contact can be supported by almost three points and are disposed face to face so as to be able to come into contact with the first movable contact when the first movable contact inversely operates.

Description

technical field [0001] The present invention relates to a push switch in which a movable contact is turned over by a push operation to connect and disconnect the contact, and particularly relates to a push switch with a two-stage operation. Background technique [0002] Conventionally, the push switch used in the shutter portion of a mobile phone or a camera is desired to have a structure capable of performing a second-stage operation in addition to the first-stage operation. In order to realize this two-stage operation, a reed contact is used at two positions, or a method of overlapping two arch-shaped contacts. [0003] In Patent Document 1, such as Figure 11 As shown, a push switch in which two arcuate contacts are overlapped is proposed. figure 1 The shown push switch includes: a switch box 921, a central fixed contact 922 in the center of the recess of the switch box 921, mutually independent peripheral fixed contacts 923 arranged at two points symmetrical positions ...

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the peripheral fixed contacts 923 and 924 are arranged only at two symmetrical positions, so when the second movable contact 931 is turned over, the first movable contact 930 is pressed unevenly. In this case, the first movable contact 930 is out of balance, the flipping action of the second movable contact 931 becomes unstable, and the tactile feeling of operation becomes poor.

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