| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk player capable of performing stable detection by a simple structure even when plural reflective type optical device are used, and preventing erroneous operations. SOLUTION: Sensors 11a and 11b are formed by a single reflective type photointerruptor 7 having a light receiving/emitting surface 7a provided on a printed wiring board, and a silver reflection sheet 9 stuck to its opposing portion. The sensors 11a and 11b are provided back and forth holding a loading roller 13 therebetween in a disk player when seen from a plane. The positions of the sensors 11a and 11b are set on a straight line X or in the vicinity thereof in a disk carrying direction and through the middle of the loading roller 13 when seen from the plane. The reflective type photointerruptor 7 and the reflection sheet 9 are disposed in the sensors 11a and 11b such that the optical paths of the sensors 11a and 11b and the straight line X are nearly orthogonal to each other when seen from a plane.
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