JPS61107122U

JPS61107122U -

Info

Publication number: JPS61107122U
Application number: JP19242784U
Authority: JP
Priority date: 1984-12-18
Filing date: 1984-12-18
Publication date: 1986-07-07
Also published as: JPH035057Y2

Description

[Brief explanation of the drawing]

第１図はこの考案に係るメンブレンスイツチの
接点部を示す概略断面図、第２図は同じく他の実
施例を示す接点部の概略断面図、第３図は従来例
を示す接点部の概略断面図である。３…上層シート、３ａ…可動接点、４…スペー
サシート、５…下層シート、５ａ…固定接点、６
…スペーサ基材、７…上層シート、７ａ…固定接
点、８…スペーサシート、９…下層シート、９ａ
…可動接点、１２…押動子、１２ａ…上部鍔部、
１２ｂ…軸部、１２ｃ…下部鍔部、１３…反転ば
ね。 Fig. 1 is a schematic sectional view showing a contact part of a membrane switch according to this invention, Fig. 2 is a schematic sectional view of a contact part showing another embodiment, and Fig. 3 is a schematic sectional view of a contact part showing a conventional example. It is a diagram. 3... Upper layer sheet, 3a... Movable contact, 4... Spacer sheet, 5... Lower layer sheet, 5a... Fixed contact, 6
...Spacer base material, 7...Upper layer sheet, 7a...Fixed contact, 8...Spacer sheet, 9...Lower layer sheet, 9a
...Movable contact, 12...Pusher, 12a...Upper flange,
12b...Shaft portion, 12c...Lower flange portion, 13...Reversal spring.

Claims

[Scope of Claim for Utility Model Registration] (1) A first upper layer sheet and a first lower layer sheet each having a movable contact and a fixed contact constituting a make contact portion formed in opposing parts on the surfaces of two flexible wiring sheets. The two contacts are laminated with a first spacer sheet that can maintain a predetermined distance between them, and a fixed contact and a movable contact forming a break contact portion are respectively formed at opposing portions on the surfaces of the two flexible wiring sheets. and a second upper layer sheet and a second lower layer sheet, which are laminated with a second spacer sheet that can maintain a predetermined distance between both the contacts, are laminated below the first lower sheet with a spacer base material interposed therebetween. It further has a shaft part inserted into a space near the make contact part and the break contact part, and an upper flange part formed at an upper peripheral edge of the shaft part can be brought into contact with the upper surface of the first upper layer sheet. and a pusher is inserted into the lower flange formed on the lower peripheral edge of the shaft that can be brought into contact with the lower surface of the second lower sheet, and further a base base below the shaft of the pusher is inserted. 1. A membrane switch characterized in that a reversal spring is inserted into a member, and the pusher is pressed upward by the reversal spring. (2) The membrane switch according to claim 1, wherein the pusher has an upper flange portion and a lower flange portion integrally formed on a shaft portion. (3) The membrane switch according to claim 1, wherein the pusher is divided into a shaft portion having an upper flange portion and a shaft portion having a lower flange portion. (4) The membrane switch according to any one of claims 1 to 3, wherein the reversing spring is a dome-shaped spring. (5) The membrane switch according to any one of claims 1 to 3, wherein the reversing spring is a plate spring having a substantially square cross section.