| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting switch which equalizes the luminance of a light emitting area, especially, even when the light emitting area is wide and thin, which is manufactured at a low cost. <P>SOLUTION: A light source 25 is mounted on an upper surface of a switch substrate 12. A light control plate 31 and a push button 14 are disposed above the light source 25 so as to overlap with each other. A first contact 22a and a second contact 22b are embedded on an upper surface of the switch substrate 12 and a reverse spring 26 for establishing electrical continuity between the contacts 22a and 22b is placed over the contacts. The light control plate 31 has: a rear surface side recess part 32 located at a center part of the rear surface; a refraction acting surface 35 refracting light toward an outer periphery direction and located at an outer peripheral part; and a total reflection acting surface 28 for totally reflecting the light toward the outer peripheral direction and located at a center part of a front surface. The light control plate 31 further includes a light guide region 37, gradually reducing the thickness, at the outer peripheral side relative to the refraction acting surface 35 and the total reflection acting surface 28. <P>COPYRIGHT: (C)2013,JPO&INPIT |
