Faucet sensor unit

Abstract

To provide a faucet sensor unit that is less prone to false detections even if dirt or water droplets adhere to the sensor cover. [Solution] The faucet sensor unit 10 includes a reflective photoelectric sensor 11 that detects the outstretching of a user's hand, and a light-transmitting sensor cover 12 that covers the photoelectric sensor 11. The photoelectric sensor 11 includes a light-emitting section 11B that emits light to the outside through the sensor cover 12, and a light-receiving section 11C that receives reflected light from the light-emitting section 11B through the sensor cover 12. The faucet sensor unit 10 further includes a light-shielding section 12C that suppresses the inward reflected light from the cover surface AS of the sensor cover 12, which is reflected inward from the light-emitting section 11B, from reaching the light-receiving section 11C. The light-shielding section 12C is positioned in a recess A4 formed on the cover surface AS of the sensor cover 12 at the boundary region A3 between the light-emitting area A1 facing the light-emitting section 11B and the light-receiving area A2 facing the light-receiving section 11C.

Claims

1. A faucet sensor unit comprising a reflective photoelectric sensor for detecting the protrusion of an object to be detected, and a light-transmitting sensor cover that covers the photoelectric sensor, The photoelectric sensor comprises a light-emitting unit that emits light to the outside through the sensor cover, and a light-receiving unit that receives reflected light emitted from the light-emitting unit through the sensor cover. The faucet sensor unit further includes a light-shielding section that suppresses the inward reflection of light from the light-emitting section, which is reflected inward from the surface of the sensor cover, from reaching the light-receiving section. A faucet sensor unit in which the light-shielding portion is disposed in a recess formed on the surface and / or back surface of the cover at the boundary area between the light-emitting area of ​​the sensor cover facing the light-emitting portion and the light-receiving area facing the light-receiving portion.

2. A faucet sensor unit according to claim 1, A sensor unit for a faucet in which the light-shielding portion is integrally molded with the sensor cover.

3. A faucet sensor unit according to claim 1 or claim 2, The recess is formed on the cover surface of the boundary region, A sensor unit for a faucet in which the light-shielding portion is provided so as to be flush with the cover surface of the sensor cover.

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