| 摘要 |
PROBLEM TO BE SOLVED: To provide a photosensor unit capable of preventing malfunction caused by unnecessary reflected light. SOLUTION: This photosensor unit has a light emitting part 10, a movable body 4 arranged relatively movably to the light emitting part, a reflection part 14 provided on the movable body, a light receiving part 12 for detecting the position of the movable body depending on whether light reflected by the reflection part is received or not, and deflecting reflection parts 16, 18 provided on the movable body. When the movable body is positioned on a position where light is to be received by the light receiving part, the light emitted from the light emitting part is reflected by the reflection part and received by the light receiving part. When the movable body is positioned on a position where the light is not to be received by the light receiving part, the light emitted from the light emitting part is reflected in the different direction from the direction wherein the light receiving part exists by the deflecting reflection part. COPYRIGHT: (C)2005,JPO&NCIPI |
