JP5989359B2 - Sensor device and toilet seat device - Google Patents

Description

  The present invention relates to a sensor device in which an optical human body detection sensor is disposed behind a window plate, and more particularly to a sensor device including a plurality of sensors. Moreover, this invention relates to the toilet seat apparatus provided with this sensor apparatus.

  In a toilet seat device installed in a Western-style toilet, a human body detection sensor for detecting a human body in a toilet room by infrared rays and a seating sensor for detecting the seating on the toilet seat by a sensor may be installed (for example, patents) Reference 1).

  4 to 6 of Patent Document 1 show a structure in which a human body detection sensor and a seating sensor are arranged behind an infrared transmission plate (referred to as a front panel in Patent Document 1). In FIG. 4 of Patent Document 1, the optical axis of each sensor is oblique to the infrared transmission plate. 5 and 6, the optical axis of each sensor is shown substantially perpendicular to the planar infrared transmission plate. However, in paragraph 0025 of Patent Document 1, the signal transmission direction of the human body detection sensor is planar. If it sees, it is described that it shifted by a predetermined angle to either the left or right, and the optical axis of the human body detection sensor is oblique to the infrared transmission plate.

JP 2004-275268 A

  When the optical axis of the optical human body detection sensor is obliquely crossed with respect to the infrared transmission plate as in Patent Document 1, a part of the light projected from the sensor is reflected on the surface of the infrared transmission plate, and the human body detection distance is Shorter. In addition, the human body detection accuracy may be reduced by this reflection or stray light propagating in the plate.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sensor device that can prevent a detection distance of an optical sensor from being lowered and that can also increase detection accuracy, and a toilet seat device including the sensor device.

  The sensor device of the present invention is a sensor device in which a window plate is provided in a window opening of a housing, and a plurality of optical human body sensors are provided behind the window plate. The optical axis of projection is perpendicular to the window plate.

In this onset bright, the window plate has a shape that is bent in a concave top and a bottom as viewed from the front obliquely intersect, the respectively to the rear behind the lower portion of the upper of the window plate A sensor is provided.

  In this case, it is preferable that the left and right half sides and the other half side of the window plate are translucent plate portions, and the light-shielding portion is formed between the translucent plate portions.

  The toilet seat device of the present invention is such that the sensor device of the present invention is provided in a toilet seat box.

  In this toilet seat device, the sensor device has a seating sensor and a human body detection sensor, and the human body detection sensor is disposed below the seating sensor, and the sensor device is in the left-right direction of the toilet seat box. It may be installed in the center of the.

  In the sensor device of the present invention, since the optical axis of each sensor is perpendicular to the window plate, the amount of light reflected and reflected by each sensor is small, the detection distance is reduced, and noise due to reflection and stray light is suppressed. Components are reduced and detection accuracy is improved.

  In the present invention, by providing a light-shielding portion between the left and right light-transmitting plate portions, stray light does not propagate from the light-transmitting side light-transmitting plate portion to the light-receiving portion-side light transmitting plate portion, and erroneous detection due to stray light is prevented. Is done.

  In the present invention, when the window plate is bent in a concave shape when viewed from the front, the depth from the front surface to the deepest part of the window plate is relatively small.

  When this sensor device has a seating sensor on the upper side and a human body detection sensor on the lower side, the sensor device is placed in the center of the toilet seat box in the left-right direction, in front of the seated person on the toilet seat and the toilet bowl. It is possible to improve the accuracy of sitting and detecting the human body by projecting infrared rays toward the center of the standing human body in the lateral direction.

It is a perspective view of the sensor apparatus concerning an embodiment. It is a longitudinal cross-sectional view of the sensor apparatus of FIG. It is the III-III sectional view taken on the line of FIG. It is a perspective view of the toilet seat device concerning an embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. As shown in FIG. 4, the toilet seat device 1 includes a toilet seat box 2 installed on a rear upper surface of a Western-style toilet, a toilet lid 3 and a toilet seat 4 that are attached to the toilet seat box 2 so as to be able to turn up and down, and a toilet seat box 2. And a sensor device 5 provided on the upper edge of the front portion.

  As shown in FIGS. 1 to 3, the sensor device 5 includes a housing 6, a window plate 9, a seating sensor 7 and a human body detection sensor 8. The housing 6 is provided integrally with the front plate portion 10 disposed flush with the outer surface of the toilet seat box 2, the window opening 11 provided in the front plate portion 10, and the rear side of the front plate portion 10. The sensor holding part 12 is provided.

  A window plate 9 is provided on the back bottom surface of the window opening 11. The window plate 9 includes translucent plates 13 and 14 made of an infrared transmitting material, and a light shielding unit 15 provided between the translucent plates 13 and 14. In this embodiment, the translucent plates 13 and 14 are made of an infrared transmitting synthetic resin material such as PMMA (polymethyl methacrylate), and the light shielding unit 15 is made of ABS resin. The window plate 9 is smoked to make it difficult to see the inside. The translucent plate parts 13 and 14 and the light shielding part 15 are integrally formed by insert molding. Each resin material is an example, and is not limited to the above.

The window plate 9 is bent to concave as viewed from the front, and has a top side S ₁ and the lower surface side S ₂ and is integral intersect at an angle θ bent plate shape. The angle θ is preferably about 128.5 to 134.5 °, particularly about 131.5 °. The window plate 9, the upper surface S ₁ is becomes obliquely downward, the lower surface S ₂ is provided so as to be obliquely upward.

The seating sensor 7 is disposed behind the upper surface side S ₁ , the human body detection sensor 8 is disposed behind the lower surface side S ₂ , and the sensor 8 is disposed below the sensor 7. Each of the sensors 7 and 8 includes an infrared light projecting unit A and a light receiving unit B that reflects infrared rays from the human body. The optical axis L ₁ of the light projected from the light projecting part A of the seating sensor 7 is perpendicular to the upper surface side S ₁ of the translucent plate part 13, and the optical axis of the light projected from the light projecting part A of the human body detection sensor 8. L ₂ is perpendicular to the lower surface _{S 2} of the transparent plate 13. In this embodiment, the vertical is in the range of 90 ° ± 3 °. The optical axes of the light receiving portions B of the sensors 7 and 8 are also perpendicular to the upper surface side S ₁ and the lower surface side S _{2 of the} translucent plate portion 14, respectively.

In the sensor device 5 thus configured, since the optical axis of the sensor 7 is perpendicular to the upper surface S ₁ of the window plate 9, the optical axis of the sensor 8 is perpendicular to the lower surface side S _2, each The amount of light projected and received by the sensors 7 and 8 is small, and a decrease in detection distance is suppressed, noise components due to reflection are reduced, and detection accuracy is improved.

  In this embodiment, since the two sensors 7 and 8 are arranged up and down, each sensor 7 and 8 can be arranged in the center of the toilet seat box 2 in the left-right direction (the toilet bowl width direction). For this reason, infrared rays are projected toward the center in the left-right direction of the human body (for example, male urine user) standing in front of the toilet seat and in the toilet bowl, and the detection accuracy of the seating and the human body is improved.

  In this embodiment, since the light shielding portion 15 is provided between the light transmitting plate portions 13 and 14, there is no propagation of stray light from the light transmitting side light transmitting plate portion 13 to the light receiving portion side light transmitting plate portion 14. Misdetection is prevented.

In this embodiment, the light shielding portion 15 is inserted into the mold, and the window plate 9 is integrally formed as a whole by insert molding in which the light transmitting plate portions 13 and 14 are injection-molded. It extends continuously from the upper end of the side S ₁ to the lower end of the lower surface S _2. For this reason, while being able to manufacture the window plate 9 which consists of the translucent board part 13 and 14 with the light-shielding part 15 at low cost, a sink mark and a weld can also be suppressed.

  In this embodiment, as shown in FIG. 2, since the window plate 9 has an inverted “<”-shaped vertical cross-sectional shape that is bent concavely when viewed from the front, the depth from the front plate portion 10 to the deepest portion of the window plate 9 is obtained. Is relatively small.

  The above-described embodiment is an example of the present invention, and the present invention may be configured other than illustrated. In the sensor device of the present invention, three or more sensors may be installed.

DESCRIPTION OF SYMBOLS 1 Toilet seat apparatus 2 Toilet seat box 4 Toilet seat 5 Sensor apparatus 6 Housing | casing 7 Seating sensor 8 Human body detection sensor 9 Window plate 10 Front plate 11 Window opening 12 Sensor holding part 13, 14 Light transmission board part 15 Light-shielding part

Claims (4)

In a sensor device in which a window plate is provided in the window opening of the housing, and a plurality of optical human body sensors are provided on the back side of the window plate,
The window plate has a shape bent concavely when viewed from the front so that the upper part and the lower part cross each other.
The upper part of the window plate is diagonally downward, the lower part of the window plate is diagonally upward,
The sensors are respectively provided behind the upper part and the lower part of the window plate,
The optical axis of the sensor projection behind the top of the window plate is perpendicular to the top of the window plate;
The sensor device according to claim 1, wherein an optical axis of light emitted from a rear sensor under the window plate is perpendicular to a lower part of the window plate . 2. The sensor according to claim 1 , wherein the left and right half sides and the other half side of the window plate are light-transmitting plate portions, and the light-transmitting plate portions are light-shielding portions. apparatus. A toilet seat device in which the sensor device according to claim 1 or 2 is provided in a toilet seat box. In Claim 3 , the sensor device has a seating sensor and a human body detection sensor, and the human body detection sensor is disposed below the seating sensor,
The toilet seat device, wherein the sensor device is installed at a central portion in the left-right direction of the toilet seat box.

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