| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device capable of uniformly lighting over wide range even if a light source with high directivity is mounted only at central part. SOLUTION: The lighting device is constituted by a circuit board 1, a light source 2 mounted on the circuit board 1, a push knob 5 having a letter display part 3 and an arrow mark display part 4, lighted from back face side by the light emitted from the light source, a light leakage prevention ring 6 mounted on the push knob, a light volume distribution adjusting member 7 arranged between the light source 2 and the push knob 5, and a resin holder 8 serving concurrently as a reflection body of which, lower end part is put on the circuit board 1, having the push knob 5 mounted on its upper end part. The light volume distribution adjusting member 7 has a translucent diffusion reflection part 7a at its central area, and a transparent part 7b at its peripheral area. COPYRIGHT: (C)2006,JPO&NCIPI
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