JPH0218228U

JPH0218228U -

Info

Publication number: JPH0218228U
Application number: JP9669988U
Authority: JP
Priority date: 1988-07-21
Filing date: 1988-07-21
Publication date: 1990-02-06
Anticipated expiration: 2003-07-21
Also published as: JPH0723858Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係わる二段階スイツチ機構を
内蔵する膜型キーボードスイツチの概念的な要部
断面構成図、第２図は固定接点パターンの一例に
よる平面構成図、そして、第３図は内部可動接点
として機能するクリツク用導電板の一例による断
面構成図である。１……可撓性絶縁ベース材、１Ａ……内方の固
定接点パターン、１Ｂ……外側の固定接点パター
ン、２……下部スペーサ、２Ａ……下部スペーサ
の透孔、３……クリツク用導電板、４……保持シ
ート、５……上部スペーサ、５Ａ……上部スペー
サの透孔、６……スイツチシート、６Ａ……上部
接点パターン。 Fig. 1 is a conceptual cross-sectional view of the main parts of a membrane keyboard switch incorporating a two-stage switch mechanism according to the present invention, Fig. 2 is a plan view showing an example of a fixed contact pattern, and Fig. 3 is an internal view of the membrane keyboard switch. FIG. 3 is a cross-sectional configuration diagram of an example of a click conductive plate that functions as a movable contact. 1... Flexible insulating base material, 1A... Inner fixed contact pattern, 1B... Outer fixed contact pattern, 2... Lower spacer, 2A... Through hole in lower spacer, 3... Conductive for click Plate, 4... Holding sheet, 5... Upper spacer, 5A... Through hole of upper spacer, 6... Switch sheet, 6A... Upper contact pattern.

Claims

[Scope of Claim for Utility Model Registration] (1) A flexible insulating base material on which a required number of fixed contact patterns are formed, and a flexible insulating switch sheet on which movable contact patterns are formed at positions corresponding to each of the above contact patterns. In a membrane keyboard switch configured such that they are arranged facing each other with a required switch operation gap in between, the opposing fixed and movable switches are arranged in response to application and release of pressing force to the key operation area of the switch sheet. 1. A membrane type keyboard switch characterized in that internal movable contacts that open and close separately between contact patterns are disposed within the switch operation gap to constitute a two-stage switch mechanism. (2) The membrane type keyboard switch according to claim 1, wherein the internal movable contact is constituted by a conductive plate for clicking that reverses and returns in response to application and release of the pressing force. (3) The switch operation gap is formed by a lower spacer provided with a through hole for accommodating the click conductive plate, and an upper spacer provided above the lower spacer and provided with a through hole larger than the through hole. configure,
3. The membrane type keyboard switch according to claim 2, wherein a holding sheet for the click conductive plate is interposed between the upper and lower spacers and extends to a side of the click conductive plate.