| 摘要 |
PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a photosensor holding device and to obtain the device having the superior efficiency in the assembly work by providing a shield piece attachably/detachably against a casing so as to cover the opened part at a side wall corresponding to a photodetecting part of the photosensor and mounting this casing on a substrate. SOLUTION: The photodetecting part 11 of the photosensor is arranged for insertion at the upper part of an opening groove part 15 of the casing 14 in the state evading the shield piece 20 from the opening groove part 15. After an opening hole 16 is mounted and fixed so as to position at a center of the photodetecting surface, a lever part 19 of a tip part of an elastic piece 18 is slid along the upper side part 17 of the casing 14 to engage a restraining piece 19a with a protrusion 17a. Then the lever part 19 is laminated to the upper side surface 17, and the shield piece 20 is moved to the position covering the opening groove part 15 in accordance with the sliding movement of the lever part 19, then the position of the shield piece 20 for covering the opening groove part 15 is maintained by the engagement between the restraining piece 19a and the protrusion 17a. When the engagement between the restraining piece 19a and the protrusion 17a is released, the shield piece 20 is returned to the position evaded from the groove part 15 by the elasticity of the elastic piece 18. |
