| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus equipped with a door, which reduces its tendency to cause a malfunction, dispenses with relay members such as a cable and a connector, and is easy to assemble. SOLUTION: A lightproof plate 9 is arranged on the rear side of a front panel 2, and an optical sensor 10 is mounted on a printed circuit board 3. When the front panel 2 is closed, an opening 9-1 of the lightproof plate 9 is positioned at an optical path between a light emitting portion 10-1 and a light receiving portion 10-2 of the optical sensor 10, and light from the light emitting portion 10-1 is made incident to the light receiving portion 10-2. When the front panel 2 is wrenched to be opened, the opening 9-1 of the lightproof plate 9 is deviated from the optical path between the light emitting portion 10-1 and the light receiving portion 10-2 of the optical sensor 10, and therefore light made incident from the light emitting portion 10-1 to the light receiving portion 10-2 is shielded until a lightproof surface 9-2 passes the optical path. |
