JPH0252229U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a conceptual cross-sectional view of the main parts of an illuminated keyboard switch in which the main body of the membrane keyboard switch is provided with a click function and a structure in which the entire operation panel is illuminated is constructed according to an embodiment of the present invention.
FIG. 2 is a similar cross-sectional view of the main parts in the case where a membrane type keyboard switch body without a click function is provided with a structure for illuminating the entire surface of the operation panel. 1: Insulating base sheet, 1A: Fixed contact pattern, 2: Flexible switch sheet, 2A: Movable contact pattern, 2B: White reflective printing layer, 3: Insulating spacer, 3A: Switch operation gap, 4: Metal plate for click , 5: Light-transmitting plate for light guide, 5A: Light-reflecting layer, 5
B: Through hole for attaching push button, 6: Switch push button, 6A:
Working projection, 7: Operation display sheet, 7A: Operation display section, 7B: White printed layer or sheet, 8: Light source for end irradiation.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An insulating base sheet 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 fixed contact patterns. In a membrane type keyboard switch that is arranged facing each other with a required switch operation gap, the switch sheet is made of a non-transparent material, and a light-guiding light-transmitting layer is disposed on the switch sheet with a light-reflecting layer interposed therebetween. A transparent switch push button attached to a through hole formed in a position corresponding to the switch operation gap of the light transmitting plate; and an operation display sheet disposed on the switch push button and the upper surface of the light transmitting plate. An illuminated keyboard switch characterized by being configured as follows. (2) The illuminated keyboard switch according to claim 1, wherein the light reflecting layer is formed by constructing the flexible insulating switch sheet from a white material. (3) The illuminated keyboard switch according to claim 1, wherein the light reflecting layer is comprised of a white printed layer formed on the upper surface of the flexible insulating switch sheet. (4) The illumination device according to claim 1, wherein the light-reflecting layer is comprised of a light-reflecting ink layer or sheet provided on a surface of the light-guiding transparent plate that is in contact with the flexible insulating switch sheet. type keyboard switch. (5) The illuminated keyboard switch according to any one of the preceding claims, wherein a white printed layer is provided on the lower surface of the operation display sheet. (6) The illuminated keyboard switch according to any one of claims (1) to (4), wherein a non-transparent white flexible sheet is disposed on the lower surface of the operation display sheet. (7) The illuminated keyboard according to any one of the preceding claims, wherein a central portion of the lower surface of the switch push button is provided with an operating protrusion that applies an operation pressing force to the membrane keyboard switch and has a function of condensing diffusely reflected light. Switch. (8) According to any one of the preceding claims, further comprising a click metal plate disposed within the switch operation gap so as to sense the opening/closing operation of the switch by reversing and returning in response to application and release of operating force. illuminated keyboard switch.