| 摘要 |
PURPOSE:To easily attain replacement with a mirror part which differ in size and shape by providing an easy attaching and detaching means for the mirror part to a housing which contains circuit blocks of an infrared detection part, human body decision part, etc., and the mirror part. CONSTITUTION:A mirror receiving part 25 is held rotatably on the body 21 of the housing 24 which contains the circuit block 5 and mirror part 1. Namely, axial projections 29 projecting inwardly from both ends of a semiarcuate fitting piece 26 for fitting the mirror receiving part 25 are engaged with bearing recessed parts 30 bored in the flank of the receiving body 25a of the mirror receiving part 25, and the mirror receiving part 25 is held rotatably around the axial projections 29. A spring 28 for pressing the outer circumferential surface of the mirror receiving part body 25a against the inner circumferential edge of a through hole 27 bored in the body 21 is interposed between the body 21 and fitting piece 26, and the fitting piece 26 is held rotatably around the part fitted in a cut 27a. The circuit block 5, on the other hand, has nearly the same front sur face shape with the mirror part 6 and is arranged behind the mirror part 1. |
