| 摘要 |
PROBLEM TO BE SOLVED: To provide a light guide structure of a push-button switch capable of illuminating a push button without luminance irregularity. SOLUTION: This light guide structure is used for illuminating the push button 10 from the lower side by making LEDs 7 emit light by a switch 4 operated by the push button 10. A light guide member 9 formed so as to have a flat upper surface and a bottom surface curved in a circular form is installed under the push button 10; the LEDs 7 are installed in a slit-like light guide part 9a formed by being directed toward the upper surface side from the bottom part of the guide member 9; and light emitted from the LEDs 7 is totally reflected in the guide member 9 and directed to the push button 10, so that the push button 10 can be illuminated by effectively using total luminous energy emitted from the LEDs 7. COPYRIGHT: (C)2004,JPO&NCIPI
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