Patent ID: 9748056
Date: 2017-08-29
CPC Classifications: H01H

Claim:
1. An illuminated push-button switch adapted such that, once a user presses an operation button, a switch body performs an operation, and light from at least one light source passes through a transmission plate and then illuminates the operation button, the illuminated push-button switch comprising: a first structure, provided on one side of the transmission plate which side faces the light source, operative to refract the light from the light source so that the refracted light is reflected within the transmission plate and then guided to a circumferential part of the transmission plate, wherein the first structure comprises uneven parts, and an area which is not the uneven parts is provided between each adjacent ones of the uneven parts, the uneven parts being at least one of inclined protrusions and inclined recesses, and wherein the uneven parts are such that a pitch interval average inclination angle, which is an average value of magnitudes of inclination angles at an interval between the uneven parts adjacent to each other, decreases with increasing distance from a center of light directed into the transmission plate from the light source.