| 摘要 |
PROBLEM TO BE SOLVED: To provide a locating detector for the installing stage of a video/ acoustic equipment in which the installing state in four directions can be exactly distinguished and detected in simple configuration. SOLUTION: The device is provided with two sets of photo-detection switches each composed of a light emitting element, light shielding piece for shielding the light of the light emitting element, attaching stand for rotating the light shielding piece, rotation regulating wall for regulating the rotational movement of the light shielding piece and photo-detector for detecting the light passing through the light shielding piece, and one photo-detection switch is located while making an attaching angle different from that of the other photo-detection switch. Further, by providing a projection in the portion of the light shielding piece in contact with the rotation regulating wall, the light shielding piece can be smoothly moved to the next state without being neutrally stopped and the installing state of the video/acoustic equipment in four directions can be exactly detected. |
