| 摘要 |
PROBLEM TO BE SOLVED: To allow an incident light to reach deep into an appliance main body by forming a shape of a face of a light receiving sensor of a light receiving lens placed in front of the light receiving sensor to have a proper curved face, refracting the incident light to the light receiving lens at a proper angle in the curved face of the light receiving lens and collecting the light by the light receiving sensor. SOLUTION: The light receiving lens 10 fitted to a lens mount section 2 of an appliance main body 1 consists of a lens section 12 having a concaved curved face 11, a circumferential wall main body section 13 that is formed around the lens section 12 and is inserted to an elliptic through-hole section 4 of the lens mount section 2, a mount guard section 15 that is projected horizontally to both sides at an inner edge of the circumferential wall main body section 13 and has a machine screw hole 14, and a position purpose projection that is projected outward nearly in the middle of the circumferential wall main body section 13 longitudinally. A concaved outer circumferential face 18 that is inserted to the elliptic through-hole 4 of the circumferential wall section 3 of the lens mount section 2 is formed to a lower outer circumference of the circumferential wall main body section 13.
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