| 摘要 |
PROBLEM TO BE SOLVED: To surely fix a half mirror at a specified position of a casing with a simple constitution. SOLUTION: A pocket 10 is formed on the bottom surface 2a of a groove part 2 so as to confront with the back surface 3a of a half mirror 3, and a recessed path 11 for injecting an adhesive which, extends to an opening end of the groove part 2 from the pocket 10 is formed, and the bottom of the pocket 10 is blocked by a positioning table 12 which is formed on the bottom surface 2a of the groove part 2 to abut on the back surface 3a of the half mirror 3, and a pair of projected line parts 14 extended to the positioning table 12 from the opening end of the groove part 2 along both side edges of the recessed path 11 for injecting the adhesive is formed. Then, a UV curing adhesive 8 is injected to two points that are the one between another end part 3c of the half mirror 3 and a positioning receptacle 7, and the one in the above pocket 10, so that the half mirror 3 is bonded to the casing 1.
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