JPH06101260A - Infrared reflecting type sensor for human body private-part washer - Google Patents

Abstract

PURPOSE:To prevent detection in error from being generated when water drops are attached to a filter and light reflects to be diffused, and improve the exactness of a sensor by setting an elastic member to be brought in close contact with a parting plate and the filter. CONSTITUTION:In a sensor unit 10, a light emitting section 11, a light receiving section 12, and a parting plate 13 are integrally formed, and an elastic member 14 is set between a filter 4 and the parting plate 13 and is brought in close contact with the filter 4 and the parting plate 13. When water drops are generated on the internal surface of the filter, then even if light from the light emitting section 11 reflects to be diffused, there is no gap between the parting plate 13 and the filter 4, and so the light reflected to be diffused is not brought in contact with the light receiving section 12. Also, when the water drops of water, urine, and the like are attached to the external surface 4c of the filter 4, then the light of component to be brought in no contact with the elastic member 14 among the light reflected to be diffused to the water drops is brought in contact with the light receiving section 12, but the light quantity of component to be brought in contact with the elastic section 14 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a man sensor (human sensor) which is installed in a human body local cleaning device and which sends a signal to a control device of an automatic toilet lid opening / closing device when it detects that a user has entered a toilet. ) Or an infrared reflective sensor of a human body local cleaning device used as a seating sensor that detects the presence or absence of a toilet seat user and prevents water from spouting when the toilet seat is not used.

[0002]

2. Description of the Related Art FIG. 3 shows an infrared reflection type sensor of a conventional human body part cleaning apparatus. Since the seat sensor and the man sensor have the same structure, only the seat sensor will be described. In the figure, the cover plate 3 is a human body local cleaning device 1
It is the cover plate 3 (FIG. 1) of FIG. The filter 4 is fixed by hooking the catch portion 4A on the cover plate 2. Further, the light emitting unit 11, the light receiving unit 12, and the partition plate 13 are formed integrally with the sensor unit 10.
This sensor unit 10 has a base plate 2 (FIG. 1).
It is installed inside. Filter 4 and partition plate 1
Since 3 is made of a hard substance having a poor elastic force, such as resin, there is a slight gap between the two.

[0003]

As described above, when there is a gap between the filter and the partition plate, the light from the light emitting portion will not be emitted when the inner surface of the filter (the side where the sensor is located) has water droplets due to dew condensation on the filter. Diffuse reflection was caused by hitting water droplets, and light was emitted through the gap between the partition plate and the filter, and light from the light emitting portion was applied to the light receiving portion. Also, when water and urine are attached to the outer surface of the filter (the side where there is no sensor), and when water droplets are present on the outer surface of the filter, the light from the light emitting part hits the water drop, causing diffuse reflection, and the light that is diffusely reflected hits the light receiving part. Was happening. The light receiving unit detects the object by detecting the amount of light reflected from the light emitting unit and returned to the light receiving unit, but since the light due to the irregular reflection as described above strikes the light receiving unit, the object is detected. Even if there was no, it would have been detected, which could result in false detection.

Here, it is considered that the filter is formed integrally with the sensor unit to eliminate the gap between the filter and the partition plate and prevent erroneous detection caused by water droplets on the inner surface of the filter. However, according to the above-mentioned configuration, since the filter is integrated with the sensor unit, a large window for the cover plate to which the filter is attached is provided so that the filter and the cover plate can be attached even if there is an error in the finished dimension. There is a problem that a step and a gap are formed between the two, the appearance is poor, and the cost is high.

Therefore, it is a technical aspect of the present invention that erroneous detection that occurs when water drops are attached to a filter and light is diffusely reflected to improve the accuracy of the sensor, and that erroneous detection is prevented at low cost. It is an issue.

[0006]

[Constitution of the invention]

[0007]

[Means for Solving the Problems] Technical means taken to solve the above-mentioned technical problems are as follows: a sensor unit provided in a human body local cleaning apparatus; Between the light emitting unit and the light receiving unit, a light receiving unit that is provided in the light receiving unit for detecting the light returning from the object and returning, and a control circuit that reads the amount of light received by the light receiving unit and detects the presence or absence of an object Infrared of a human body local cleaning device provided with a partition plate that is provided to prevent light emitted from the light emitting unit from directly entering the light receiving unit and a filter that is provided in front of the light emitting unit and the light receiving unit and covers the light emitting unit and the light receiving unit. The reflective sensor is provided with an elastic member provided between the partition plate and the filter and in close contact with the partition plate and the filter.

[0008]

The operation of the above technical means will be described. By providing an elastic member that is provided between the partition plate and the filter and is in close contact with the partition plate and the filter, the gap between the partition plate and the filter can be filled even if there is some deviation in the finished dimensions. Even if the light from the light emitting portion hits the water droplet and is irregularly reflected by the water droplet on the inner surface of the filter, since there is no gap between the partition plate and the filter, the diffusely reflected light is prevented from passing through the gap and hitting the light receiving portion. Further, since a part of the light diffusely reflected by the water droplets attached to the outer surface of the filter hits the elastic member, the false detection caused by the light hitting the light receiving portion due to the diffused reflection is reduced. In this way, since the amount of light diffusely reflected by the water droplets that hits the light receiving portion can be greatly reduced, erroneous detection is prevented and the accuracy of the sensor is improved. Moreover, since the elastic member is provided, erroneous detection can be prevented, so that the cost is low.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the external appearance of a human body local cleaning apparatus according to the present invention. In the figure, reference numeral 1 denotes a body part of a human body part cleaning device. The cover plate 3 is mounted on the base plate 2, the sensor main body is disposed in the base plate 2 and the cover plate 3, and the seating sensor unit 10 (FIG. 2) and the filters 4 and 5 of the man sensor (not shown) are mounted. Has been.

FIG. 2 shows a seating sensor diagram. Since the seating sensor and the man sensor are the same infrared reflective sensor, only the seating sensor will be described. In the figure, the filter 4 is fixed to the cover plate 3 by hooking the catch portion 4A on the cover plate 3. The sensor unit 10 has a light emitting portion 11, a light receiving portion 12, and a partition plate 13 which are integrally formed, and is attached to the base plate 2 among the base plate 2 (FIG. 1) and the cover plate 3. or,
An elastic member 14 is provided between the filter 4 and the partition plate 13 and is in close contact with the filter 4 and the partition plate 13.

When water drops are generated on the inner surface 4B of the filter, even if the light from the light emitting section 11 is diffusely reflected, there is no gap between the partition plate 13 and the filter 4, so that the light reflected irregularly is received by the light receiving section 1.
It won't hit 2. Further, when water droplets such as water and urine are attached to the outer surface 4C of the filter, the light emitted from the light emitting unit 11 is diffused and reflected by the water droplets. Of this irregularly reflected light, the light that does not hit the elastic member 14 hits the light receiving portion 12,
Since the light that hits the elastic member 14 does not hit the light receiving unit 12, the amount of light that hits the elastic member 14 in the diffusely reflected light is reduced.

Therefore, as a whole, all the light reflected by the water droplets on the filter inner surface 4B and hitting the light receiving portion 12 can be eliminated, and the light reflected by the water droplets on the filter outer surface 4C and hitting the light receiving portion 12 is elastic member 14. The amount of light that hits is reduced.

By increasing the width of the elastic member 14 as long as the function of the optical sensor is not hindered, the amount of light diffusely reflected by the water droplets that hits the light receiving portion 12 is reduced and the accuracy of the sensor is improved.

[0015]

EFFECTS OF THE INVENTION A light emitting portion provided in a sensor unit provided in a human body part cleaning apparatus and emitting light, and a light receiving portion provided in the sensor unit for detecting light reflected by an object and returned. A control circuit that reads the amount of light received by the light receiving unit and detects the presence or absence of an object, and a partition plate that is arranged between the light emitting units and prevents the light emitted from the light emitting units from directly entering the light receiving units. In an infrared reflective sensor of a human body part cleaning device provided with a filter provided in front of the light emitting part and the light receiving part and covering the light emitting part and the light receiving part, it is provided between the partition plate and the filter and is in close contact with the partition plate and the filter. An infrared reflection type sensor for a human body part cleaning device having an elastic member,
The accuracy of the sensor is improved by preventing false detections that occur when light is diffusely reflected due to water drops on the filter. Further, since the elastic member is provided, erroneous detection can be prevented, so that the cost is low. By widening the width of the elastic member as long as it does not interfere with the function of the optical sensor,

[Brief description of drawings]

FIG. 1 is a perspective view of a body part of a human body cleaning apparatus.

FIG. 2 is a light emitting portion, a light receiving portion of a filter and a seating sensor,
The figure of a partition board is shown.

FIG. 3 shows diagrams of a light emitting portion, a light receiving portion, and a partition plate of a conventional filter and a seating sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Human body part cleaning apparatus main body 2 ... Base plate 3 ... Cover plate 4 ... Filter (seating sensor) 5 ... Filter (man sensor) 10 ... Sensor unit 11 ... Light emitting part 12 ... Light receiving part 13 ... Partition plate 14 ... Elastic member

Claims (1)

[Claims] 1. A light emitting portion provided in a sensor unit provided in a human body local area cleaning device and emitting light, and a light receiving portion provided in the sensor unit for detecting the light reflected and returned to an object. Section, a control circuit that detects the presence or absence of an object by reading the amount of light received by the light receiving section, and the light emitted from the light emitting section that is disposed between the light emitting section and the light receiving section directly receives the light. In the infrared reflection type sensor of the human body local cleaning apparatus, which is provided with a partition plate that prevents the light emitting unit and the light receiving unit from being provided in front of the light emitting unit and the light receiving unit, the partition plate And an elastic member provided between the filter and the partition plate and in close contact with the filter.