JPS58133221U - key switch mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is an illustrative cross-sectional view showing an example of a switch mechanism that is the background of this invention. FIG. 2 is an illustrative cross-sectional view showing a conductive part covered with a carbon film, which is the background of this invention. FIGS. 3 to 5 are illustrative cross-sectional views showing embodiments of this invention, respectively. FIG. 6 is a plan view illustrating that the deformation prevention member is formed over the entire length between two conductive parts. FIGS. 7A and 7B are illustrative views showing other embodiments of this invention. In the figure, 3 is an insulating substrate, 51 and 52 are conductive members, 71a and 72a are carbon coatings, 9 is a conductive comb contact, 13. 13a, 13b 3C indicates a deformation prevention member.

Claims (9)

[Scope of utility model registration request] (1) an insulating substrate; two conductive parts formed at a predetermined interval on the insulating substrate and having a thickness; and a part that is normally located above the two conductive parts and pressed. A key switch mechanism including a switch contact made of a soft conductive material that causes electrical continuity between the two conductive parts by being brought into contact with the two conductive parts simultaneously, a deformation prevention member arranged to have a thickness that corresponds to at least a part of the distance between the two conductive parts, thereby alleviating deformation when the switch contact made of the soft conductive material is pressed against the two conductive parts. A key switch mechanism characterized by: (2) The key switch mechanism according to claim 1, wherein the deformation prevention member includes an insulating material. (3) The key switch mechanism according to claim 2, wherein the deformation prevention member is provided over the entire width of the interval between the two conductive parts. (4) The deformation prevention member includes a third conductive part arranged in a space between the two conductive parts so as not to come into contact with them, and a third conductive part arranged between the two conductive parts and the third conductive part. A key switch mechanism according to any one of claims 1 to 3, which includes an insulating material covering the gap. (5) The key switch mechanism according to claim 4, wherein the third conductive part and the two conductive parts are formed of the same material and in the same process. (6) The two conductive parts are opposite each other and have lengths of 1 to 5, and the deformation prevention member is formed over the entire length of the deformation prevention member. A key switch mechanism according to any of paragraphs. (7) The key switch mechanism according to any one of claims 1 to 6, wherein the two conductive parts each contain carbon. (8) The two conductive parts each include a conductive pattern made of copper or the like, and a carbon printing pattern formed on the conductive pattern made of copper or the like so as to cover it, a utility model registration request. The key switch mechanism according to item 7. (9) The insulating substrate and the conductive pattern made of copper or the like are made of a printed wiring board, and the deformation prevention member includes a solder resist formed on the printed wiring board. The key switch mechanism according to item 8.