| 摘要 |
<p>PURPOSE: To obtain an object detector being excellent in both of an assembling property and the replaceability of a condenser lens while the lens is fixed firmly. CONSTITUTION: A condenser lens 2 is provided with two elastically-displaceable leg parts 2b projecting from the edge part 2a of the lens, and the leg parts 2b are provided with engagement pawls 2c projecting outward, respectively. In the edge part of the inner wall part 3b of a hole part 3e of a housing 5, notch-shaped pawl receiving parts 3a with which the engagement pawls 2c of the condenser lens 2 engage and four projecting parts 3c with which the edge part 2a of the condenser lens 2 comes into contact are provided, and the condenser lens 2 is fitted from the front side of the housing 5 removably.</p> |
