JP7783569B2 - cabinet - Google Patents

Description

Aspects of the present invention generally relate to cabinets.

Technology has been proposed in the past in which a human body detection sensor installed in the toilet equipment inside a toilet room automatically turns on and off lighting devices installed in the toilet fixtures, creating a dramatic lighting effect inside the toilet room (Patent Document 1).

The above-mentioned lighting system is realized by using a dedicated toilet device equipped with a human body detection sensor. Therefore, for example, in order to introduce such a lighting system, it is necessary to use a dedicated toilet device, which poses the problem of limiting consumer choices.

In response to this, a technology has been proposed in which a human body detection sensor is installed on the front panel of a toilet cabinet located at the rear of the toilet device to detect a human body entering the toilet room (Patent Document 2).

JP 2017-169901 A JP 2017-000572 A

However, with this type of conventional technology, when a radio wave sensor is used as a human body detection sensor, the radio waves emitted from inside the cabinet body can penetrate not only the cabinet body but also the walls of the toilet room, resulting in the detection of not only a human body inside the toilet room, but also a human body outside the toilet room. If a human body outside the toilet room is detected, lighting equipment may automatically turn on when the toilet room is not in use, which could cause problems such as increased power consumption.

The present invention was made in recognition of this issue, and aims to provide a cabinet that enables detection of a human body inside the toilet room while suppressing detection of a human body outside the toilet room.

The first invention is a cabinet placed to the side of a toilet bowl inside a toilet room, comprising: a cabinet main body having a storage compartment capable of storing items inside; and a radio wave sensor provided inside the storage compartment that detects a human body in the toilet room using radio waves, wherein the radio wave sensor is provided so that a first reflectance of the radio waves when incident on the cabinet main body is smaller than a second reflectance of the radio waves when incident on a wall of the toilet room.

With this cabinet, the radio wave sensor is installed so that the first reflectivity of radio waves when they enter the cabinet body is smaller than the second reflectivity of radio waves when they enter the wall of the toilet room. This makes it easier for radio waves to penetrate the cabinet body when they enter, and makes it harder for radio waves to penetrate the wall of the toilet room. This makes it possible to detect a human body inside the toilet room while suppressing detection of a human body outside the toilet room.

The second invention is a cabinet according to the first invention, characterized in that the first reflectivity is adjustable by a first angle of incidence of the radio waves relative to the cabinet body, and the second reflectivity is adjustable by a second angle of incidence of the radio waves relative to the wall of the toilet room.

With this cabinet, the first reflectance and second reflectance can be easily adjusted by adjusting the first incident angle of the radio waves to the cabinet body and the second incident angle of the radio waves to the wall of the toilet room. This makes it easier to both improve the accuracy of detecting human bodies inside the toilet room and suppress the detection of human bodies outside the toilet room.

The third invention is a cabinet according to the first or second invention, characterized in that the radio wave sensor is installed so that, when viewed from above, the toilet seat and the wall of the toilet room located in front of the toilet bowl are in the maximum directivity direction of the radio waves emitted from the radio wave sensor.

With this cabinet, by positioning the radio wave sensor so that the toilet seat is in the direction of maximum directivity of the radio waves emitted from the radio wave sensor, it is possible to detect a user sitting on the toilet seat. Furthermore, by positioning the radio wave sensor so that the wall of the toilet room located in front of the toilet bowl is in the direction of maximum directivity of the radio waves emitted from the radio wave sensor, it is possible to suppress detection of a human body outside the wall of the toilet room located in front of the toilet bowl.

A fourth invention is a cabinet according to any one of the first to third inventions, characterized in that the first reflectivity and the second reflectivity are reflectivities of p-waves of the radio waves.

With this cabinet, the first reflectivity and second reflectivity are set to the reflectivity of p-waves of radio waves, thereby increasing the selectivity ratio between the first reflectivity and the second reflectivity. This makes it easier to both improve the accuracy of detecting people inside the toilet and suppress the detection of people outside the toilet.

A fifth invention is a cabinet according to any one of the first to fourth inventions, characterized in that the storage section has a first section accessible to the user and a second section inaccessible to the user, and the radio wave sensor is provided inside the second section.

With this cabinet, the radio wave sensor is located inside the second section, which is inaccessible to users, preventing users from accidentally changing the installation angle of the radio wave sensor. This prevents a deterioration in the accuracy of detecting human bodies in the toilet room due to changes in the installation angle of the radio wave sensor.

According to one aspect of the present invention, a cabinet is provided that enables detection of a human body inside the toilet room while suppressing detection of a human body outside the toilet room.

1 is a perspective view schematically illustrating a toilet system including a cabinet according to an embodiment. FIG. 1 is a perspective view schematically illustrating a cabinet according to an embodiment. FIG. 2 is a cross-sectional view schematically illustrating a part of a cabinet according to the embodiment. FIG. 2 is a block diagram schematically illustrating a part of a cabinet according to an embodiment. FIG. 1 is an explanatory diagram showing s-waves and p-waves of radio waves. 1 is a graph showing an example of changes in reflectivity with respect to the angle of incidence of s-waves and p-waves. 1 is a plan view schematically illustrating a toilet system including a cabinet according to an embodiment. FIG. 10 is a plan view schematically illustrating a modified example of a toilet system including a cabinet according to the embodiment. FIG. 10 is a plan view schematically illustrating a modified example of a toilet system including a cabinet according to the embodiment. FIG. 10 is a plan view schematically illustrating a modified example of a toilet system including a cabinet according to the embodiment. FIG. 10 is a plan view schematically illustrating a modified example of a toilet system including a cabinet according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, like components are designated by like reference numerals and detailed descriptions thereof will be omitted where appropriate.
FIG. 1 is a perspective view schematically illustrating a toilet system including a cabinet according to an embodiment.
1, the toilet system 500 includes a cabinet 100 and a toilet device 200. The cabinet 100 and the toilet device 200 are provided inside a toilet room TR.

The toilet room TR has a front wall FW, a rear wall BW, a right wall RW, a left wall LW, and a floor FS. The toilet device 200 is attached to the floor FS, for example. The toilet device 200 may also be attached to the rear wall BW. The toilet device 200 may also be attached to a position away from the floor FS, for example.

The toilet device 200 comprises, for example, a toilet bowl 210, a toilet seat 220, and a toilet lid 230. The toilet seat 220 is provided on top of the toilet bowl 210. The toilet lid 230 is provided on top of the toilet bowl 210 so as to cover the toilet seat 220. The toilet seat 220 and the toilet lid 230 are pivotally supported relative to the toilet bowl 210. Figure 1 shows the toilet seat 220 in the lowered position and the toilet lid 230 in the raised position.

In this specification, the above, below, front, rear, right side, and left side as seen from a user sitting on the toilet seat 220 with their back to the toilet lid 230 will be referred to as "above," "below," "front," "rear," "right side," and "left side," respectively.

The toilet device 200 may also have a heated toilet seat function that warms the toilet seat 220, or a private parts washing function that cleans the private parts of a user seated on the toilet seat 220.

The cabinet 100 is positioned to the side of the toilet bowl 210. The cabinet 100 is attached, for example, to the right wall RW or the left wall LW. In this example, the cabinet 100 is attached to the right wall RW. The cabinet 100 may also be attached to the left wall LW.

The toilet room TR is provided with a door TD for entering and exiting the toilet room TR. In this example, the door TD is provided on the front wall FW. The door TD may also be provided, for example, on a wall (e.g., the left-side wall LW) opposite the wall on which the toilet room TR's cabinet 100 is provided. In this case, the door TD is provided, for example, in a position that does not overlap with the toilet bowl 210 in the left-right direction.

FIG. 2 is a perspective view schematically illustrating a cabinet according to the embodiment.
FIG. 3 is a cross-sectional view schematically illustrating a part of the cabinet according to the embodiment.
FIG. 4 is a block diagram schematically illustrating a part of the cabinet according to the embodiment.
2 to 4, the cabinet 100 includes a cabinet body 10 and a radio wave sensor 20. In this example, the cabinet 100 further includes an illumination unit 30, a control unit 40, a hand washing basin 50, and a toilet paper holder 60.

The cabinet body 10 is a roughly rectangular box-shaped body having a storage section 11 inside which items can be stored. In this example, the cabinet body 10 extends forward of the toilet bowl 210. In other words, in this example, the front end of the cabinet body 10 is located forward of the front end of the toilet bowl 210. However, the front end of the cabinet body 10 may also be located rearward of the front end of the toilet bowl 210.

The cabinet body 10 is attached, for example, to the right wall RW or left wall LW of the toilet room TR. In this example, the cabinet body 10 is attached at a position away from the floor surface FS of the toilet room TR. In other words, in this example, a space is formed between the cabinet body 10 and the floor surface FS. The cabinet body 10 is a so-called half cabinet. The cabinet body 10 may be placed, for example, on the floor surface FS of the toilet room TR.

In this example, the cabinet body 10 extends to the rear wall BW. In other words, the rear end of the cabinet body 10 is in contact with the rear wall BW. The rear end of the cabinet body 10 may be located forward of the rear wall BW, or may be located rearward of the rear wall BW. In other words, the cabinet body 10 may be separated from the rear wall BW, or may be embedded in the rear wall BW.

The storage section 11 has a first section 11a that is accessible to the user and a second section 11b that is inaccessible to the user. In other words, the first section 11a is a section where the user can put items in and take them out, and the second section 11b is a section where the user cannot put items in and take them out.

The first part 11a has, for example, a door DR that can be opened and closed on the surface facing the toilet bowl 210. In this example, the door DR is approximately parallel to the right wall RW or the left wall LW of the toilet room TR, and approximately perpendicular to the floor surface FS of the toilet room TR. The door DR may also be inclined with respect to the right wall RW, left wall LW, and floor surface FS of the toilet room TR.

The door DR is, for example, a push-type door without a handle, and the user can open the door DR by pushing the door DR. In this example, a paper roll holder 60 is provided in the center of the front-to-rear direction of the cabinet body 10, and two doors DR are provided in front of the paper roll holder 60 and one door DR is provided behind the paper roll holder 60. In other words, in this example, two first parts 11a are provided in front of the paper roll holder 60 and one door DR is provided behind the paper roll holder 60.

The second portion 11b is located behind the first portion 11a, which is located behind the paper roll holder 60. In other words, the second portion 11b is located at the rearmost part of the storage section 11. The second portion 11b has, for example, a side panel that covers the surface facing the toilet bowl 210. In other words, the surface of the second portion 11b facing the toilet bowl 210 is covered by the side panel. For ease of explanation, the side panel that is located on the surface of the second portion 11b facing the toilet bowl 210 is omitted from Figure 2. The second portion 11b is provided as needed and can be omitted. In other words, the storage section 11 does not have to have the second portion 11b.

For example, if the cabinet body 10 is embedded in the rear wall BW, the second portion 11b of the cabinet body 10 is embedded in the rear wall BW. By embedding the second portion 11b of the cabinet body 10 in the rear wall BW in this way, the position of the cabinet body 10 in the front-to-rear direction can be adjusted.

The radio wave sensor 20 detects a human body within the toilet room TR. The radio wave sensor 20 is, for example, a microwave sensor. The radio wave sensor 20 detects, for example, a human body entering and exiting the toilet room TR, and a human body sitting on the toilet seat 220. In this embodiment, the radio waves emitted from the radio wave sensor 20 can penetrate the cabinet main body 10 and the walls of the toilet room TR. In other words, the cabinet main body 10 and the walls of the toilet room TR are made of a material that can penetrate the radio waves emitted from the radio wave sensor 20.

The radio wave sensor 20 is provided, for example, inside the storage section 11 of the cabinet main body 10. The radio wave sensor 20 is provided inside the first section 11a or the second section 11b of the storage section 11 of the cabinet main body 10. In this example, the radio wave sensor 20 is provided inside the second section 11b.

In this way, by providing the radio wave sensor 20 in the second portion 11b, which is inaccessible to the user, it is possible to prevent the user from accidentally changing the installation angle of the radio wave sensor 10. This prevents a deterioration in the accuracy of detecting a human body in the toilet room TR due to a change in the installation angle of the radio wave sensor 10.

The lighting unit 30 illuminates the interior of the toilet room TR. As shown in Figures 2 and 3, in this example, the lighting unit 30 is provided at the bottom of the cabinet main body 10 and emits light downward from the cabinet main body 10. This illuminates the floor surface FS, creating a dramatic light effect within the toilet room TR. In this example, the lighting unit 30 is provided in the center of the cabinet main body 10 in the front-to-back direction, and is located below the toilet paper holder 60.

The location where the lighting unit 30 is provided is not limited to this. The lighting unit 30 may be provided, for example, on the top of the cabinet main body 10. By providing the lighting unit 30 on the top of the cabinet main body 10, the top plate (counter) of the cabinet main body 10 can be illuminated. The lighting unit 30 may also be provided, for example, below the hand wash basin 50. By providing the lighting unit 30 below the hand wash basin 50, the area around the hand wash basin 50 can be illuminated.

The light source of the illumination unit 30 is, for example, an LED (light emitting diode). The light source of the illumination unit 30 is not limited to an LED and may be any light source that is capable of emitting visible light.

The control unit 40 controls the lighting unit 30 based on the detection results of the radio wave sensor 20. As shown in FIG. 4, the radio wave sensor 20 transmits the detection results to the control unit 40. The control unit 40 controls the operation of the lighting unit 30 based on the detection results transmitted from the radio wave sensor 20. In other words, the control unit 40 transmits a control signal to the lighting unit 30 to control the operation of the lighting unit 30.

In this example, the control unit 40 is provided separately from the radio wave sensor 20, but the control unit 40 may also be provided inside the radio wave sensor 20. The control unit 40 may also send a control signal to the radio wave sensor 20 to control the operation of the radio wave sensor 20. For example, the control unit 40 may send a signal to the radio wave sensor 20 to forcibly turn off the radio wave sensor 20. In this way, the control unit 40 may not only receive detection results from the radio wave sensor 20, but may also communicate bidirectionally with the radio wave sensor 20.

For example, when the radio wave sensor 20 detects a human body entering the toilet room TR, the control unit 40 turns on the lighting unit 30. For example, when the radio wave sensor 20 detects human body movement in the toilet room TR, the control unit 40 turns on the lighting unit 30. For example, when the radio wave sensor 20 detects a human body leaving the toilet room TR, the control unit 40 turns off the lighting unit 30. In this case, when the radio wave sensor 20 detects a human body leaving the toilet room TR, the control unit 40 may immediately turn off the lighting unit 30, or the control unit 40 may set a delay time (for example, 90 seconds) and turn off the lighting unit 30 after the delay time.

For example, the cabinet 100 may further include an operation unit (e.g., a switch or remote control) for operating the lighting unit 30. In addition to control based on the detection results of the radio wave sensor 20 described above, the control unit 40 may also control the operation of the lighting unit 30 based on, for example, operation of the operation unit by the user.

In this way, by providing the lighting unit 30 and the control unit 40, the lighting unit 30 can be controlled by the control unit 40 in the cabinet 100 based on the detection results of the radio wave sensor 20. Therefore, a lighting effect can be created in the toilet room TR without using a dedicated toilet device. The control unit 40 may also control the operation of other devices provided in the toilet room TR based on the detection results of the radio wave sensor 20.

The hand wash basin 50 is provided, for example, on the countertop of the cabinet main body 10. The hand wash basin 50 has a faucet device 51 and a bowl 52. The bowl 52 is provided below the water outlet of the faucet device 51 and receives the water discharged from the faucet device 51. Water drained from the bowl 52 is discharged, for example, via a drain pipe (not shown) housed inside the cabinet main body 10 to a discharge section (not shown) provided on the wall surface. The hand wash basin 50 is provided as needed and can be omitted.

The toilet paper holder 60 holds the toilet paper TP. The toilet paper holder 60 is provided so that the toilet paper TP can be removed toward the toilet bowl 210. The toilet paper holder 60 is provided as needed and can be omitted.

FIG. 5 is an explanatory diagram showing s-waves and p-waves of radio waves.
5, radio waves include s-waves and p-waves. The s-waves are components that vibrate in a direction perpendicular to a plane that includes the normal NV to the reflecting surface RS and the maximum directivity direction AX of the radio waves. The p-waves are components that vibrate in a direction parallel to the plane that includes the normal NV and the maximum directivity direction AX of the radio waves. The maximum directivity direction AX of the radio waves is the direction in which the strength of the radio waves is greatest within the detection area of the radio wave sensor 20.

When the radio waves emitted from the radio wave sensor 20 hit an object (for example, the cabinet main body 10 or the wall of the toilet room TR), they are incident at an incident angle θ. At this time, part of the radio waves that hit the object are reflected. The incident angle θ is the angle between the normal NV and the maximum directivity direction AX of the radio waves.

FIG. 6 is a graph showing an example of changes in reflectance with respect to the incident angle of s-waves and p-waves.
As shown in Fig. 6, the reflectance Rf changes depending on the incident angle θ of the radio wave. Note that the reflectance Rf with respect to the incident angle θ of the radio wave differs depending on the material of the object that reflects it. Furthermore, the tendency of the change in reflectance Rf with respect to the incident angle θ differs between s-waves and p-waves.

The reflectivity Rfs of s-waves increases as the incident angle θ increases, and decreases as the incident angle θ decreases. In other words, the larger the incident angle θ, the more difficult it is for s-waves to transmit, and the smaller the incident angle θ, the more easily they transmit.

The tendency for the reflectivity Rfp of p-waves to change with the incident angle θ changes at the Brewster angle. The Brewster angle is the angle at which the reflectivity Rfp of p-waves becomes 0. In this example, the Brewster angle is approximately 72 degrees.

At angles less than the Brewster angle, the reflectivity Rfp of p-waves decreases as the incident angle θ increases and increases as the incident angle θ decreases. In other words, at angles less than the Brewster angle, the larger the incident angle θ, the more easily p-waves are transmitted, and the smaller the incident angle θ, the less easily they are transmitted. On the other hand, at angles greater than the Brewster angle, the reflectivity Rfp of p-waves increases as the incident angle θ increases and decreases as the incident angle θ decreases. In other words, at angles greater than the Brewster angle, the larger the incident angle θ, the more easily p-waves are transmitted, and the smaller the incident angle θ, the more easily they are transmitted.

In this embodiment, the radio wave sensor 20 is arranged so that the first reflectance Rf1 of radio waves incident on the cabinet main body 10 is smaller than the second reflectance Rf2 of radio waves incident on the wall of the toilet room TR.

In this way, by arranging the radio wave sensor 20 so that the first reflectivity Rf1 of radio waves when they enter the cabinet main body 10 is smaller than the second reflectivity Rf2 of radio waves when they enter the wall of the toilet room TR, it is possible to make it easier for radio waves to penetrate when they enter the cabinet main body 10, and to make it more difficult for radio waves to penetrate when they enter the wall of the toilet room TR. This makes it possible to detect a human body inside the toilet room TR, while suppressing the detection of a human body outside the toilet room TR.

The first reflectivity Rf1 can be adjusted, for example, by adjusting the first incident angle θ1 of the radio waves relative to the cabinet body 10. The first incident angle θ1 is the angle between the first normal NV1 to the first reflecting surface RS1 of the cabinet body 10 and the maximum directivity direction AX of the radio waves emitted from the radio wave sensor 20 (see Figure 7). The first incident angle θ1 can be adjusted, for example, by changing the mounting angle of the radio wave sensor 20.

The second reflectivity Rf2 can be adjusted, for example, by adjusting the second incident angle θ2 of the radio waves with respect to the wall of the toilet room TR. The second incident angle θ2 is the angle between the second normal NV2 to the second reflecting surface RS2 of the wall of the toilet room TR and the maximum directivity direction AX of the radio waves emitted from the radio wave sensor 20 (see Figure 7). The second incident angle θ2 can be adjusted, for example, by changing the installation angle of the radio wave sensor 20.

In this way, by adjusting the incident angle θ1 of the radio waves with respect to the cabinet body 10 and the second incident angle θ2 of the radio waves with respect to the wall of the toilet room, the first reflectance Rf1 and the second reflectance Rf2 can be easily adjusted. This makes it easier to both improve the accuracy of detecting human bodies inside the toilet room TR and suppress the detection of human bodies outside the toilet room TR.

For the sake of convenience, the material of the cabinet body 10 and the material of the toilet room TR are assumed to be the same. Therefore, the dielectric constant of the cabinet body 10 and the dielectric constant of the walls of the toilet room TR can be assumed to be the same. In other words, the graph shown in Figure 6 can be applied to both the first reflectance Rf1 and the second reflectance Rf2. In the embodiment, the material of the cabinet body 10 and the material of the toilet room TR may be the same or different.

In this embodiment, the first reflectance Rf1 and the second reflectance Rf2 are preferably the p-wave reflectance Rfp. In this way, by setting the first reflectance Rf1 and the second reflectance Rf2 to the p-wave reflectance Rfp, the selectivity ratio between the first reflectance Rf1 and the second reflectance Rf2 can be increased. This makes it easier to both improve the detection accuracy of human bodies inside the toilet room TR and suppress the detection of human bodies outside the toilet room TR.

FIG. 7 is a plan view schematically illustrating a toilet system including a cabinet according to the embodiment.
7, in this example, the front wall FW of the toilet room TR is approximately parallel to the rear wall BW, and the right wall RW of the toilet room TR is approximately parallel to the left wall LW. That is, in this example, the toilet room TR is approximately rectangular in top view. Also, in this example, the cabinet main body 10 is approximately rectangular in top view.

The radio wave sensor 20 is located on the rear side of the cabinet main body 10 and emits radio waves toward the door TD located on the front wall FW of the toilet room TR. The radio waves emitted from the radio wave sensor 20 are incident on the first reflecting surface RS1 of the cabinet main body 10 at a first incident angle θ1, and then incident on the second reflecting surface RS2 of the wall of the toilet room TR, which is part of the front wall FW, at a second incident angle θ2.

The first reflective surface RS1 is approximately parallel to the right wall RW and left wall LW of the toilet room TR. The second reflective surface RS2 is approximately parallel to the front wall FW of the toilet room TR.

In this example, the first incident angle θ1 is 60 degrees, and the second incident angle θ2 is 30 degrees. As shown in Figure 6, if the first reflectivity Rf1 and the second reflectivity Rf2 are the p-wave reflectivity Rfp, the first reflectivity Rf1 when θ = 60° is smaller than the second reflectivity Rf2 when θ = 30°.

In this way, by positioning the radio wave sensor 20 so that the first reflectance Rf1 is smaller than the second reflectance Rf2, the radio waves emitted from the radio wave sensor 20 are more likely to pass through the reflective surface RS1 of the cabinet main body 10 and less likely to pass through the reflective surface RS2 of the wall of the toilet room TR. This makes it easier to detect a human body inside the toilet room TR and more difficult to detect a human body outside the toilet room TR.

In addition, in this example, the radio wave sensor 20 is positioned so that, when viewed from above, the toilet seat 220 and the wall of the toilet room located in front of the toilet bowl 210 (i.e., the front wall FW) are located in the maximum directivity direction AX of the radio waves emitted from the radio wave sensor 20.

In this way, by positioning the radio wave sensor 20 so that the toilet seat 220 is in the maximum directivity direction AX of the radio waves emitted from the radio wave sensor 20, it is possible to detect a user sitting on the toilet seat 220. Furthermore, by positioning the radio wave sensor 20 so that the toilet room wall FW located in front of the toilet bowl 210 is in the maximum directivity direction AX of the radio waves emitted from the radio wave sensor 20, it is possible to suppress detection of a human body outside the toilet room wall FW located in front of the toilet bowl 210.

In this embodiment, the radio wave sensor 20 is preferably installed so that its maximum directivity direction AX is located above the toilet seat 220. By installing the radio wave sensor 20 in this position, it is possible to prevent the radio waves emitted from the radio wave sensor 20 from being blocked by the toilet seat 220. This makes it easier to detect a human body in the toilet room TR.

FIG. 8 is a plan view schematically illustrating a modification of the toilet system including the cabinet according to the embodiment.
As shown in Figure 8, in this example, the front wall FW of the toilet room TR is approximately parallel to the rear wall BW, and the right wall RW of the toilet room TR is not parallel to the left wall LW. The left wall LW of the toilet room TR is inclined to the right from the rear to the front. That is, in this example, the toilet room TR is approximately trapezoidal in top view. Also, in this example, the cabinet main body 10 is approximately rectangular in top view.

The radio wave sensor 20 is located on the rear side of the cabinet main body 10 and emits radio waves toward the door TD located on the left wall LW of the toilet room TR. The radio waves emitted from the radio wave sensor 20 are incident on the first reflecting surface RS1 of the cabinet main body 10 at a first incident angle θ1, and then incident on the second reflecting surface RS2 of the wall of the toilet room TR, which is part of the left wall LW, at a second incident angle θ2.

The first reflective surface RS1 is approximately parallel to the right wall RW of the toilet room TR, but not parallel to the left wall LW. The second reflective surface RS2 is approximately parallel to the left wall LW of the toilet room TR, but not parallel to the right wall RW.

In this example, the first incident angle θ1 is 60 degrees, and the second incident angle θ2 is 40 degrees. As shown in Figure 6, if the first reflectivity Rf1 and the second reflectivity Rf2 are the p-wave reflectivity Rfp, the first reflectivity Rf1 when θ = 60° is smaller than the second reflectivity Rf2 when θ = 40°.

FIG. 9 is a plan view schematically illustrating a modification of the toilet system including the cabinet according to the embodiment.
9, in this example, the toilet room TR has a substantially rectangular shape when viewed from above, and the cabinet main body 10 has a substantially trapezoidal shape when viewed from above.

The radio wave sensor 20 is located on the rear side of the cabinet main body 10 and emits radio waves toward the door TD located on the left wall LW of the toilet room TR. The radio waves emitted from the radio wave sensor 20 are incident on the first reflecting surface RS1 of the cabinet main body 10 at a first incident angle θ1, and then incident on the second reflecting surface RS2 of the wall of the toilet room TR, which is part of the left wall LW, at a second incident angle θ2.

The first reflective surface RS1 is not parallel to the right wall RW and the left wall LW of the toilet room TR. The first reflective surface RS1 is inclined to the left as it moves from the rear to the front. The second reflective surface RS2 is approximately parallel to the left wall LW and the right wall RW of the toilet room TR.

In this example, the first incident angle θ1 is 60 degrees, and the second incident angle θ2 is 40 degrees. As shown in Figure 6, if the first reflectivity Rf1 and the second reflectivity Rf2 are the p-wave reflectivity Rfp, the first reflectivity Rf1 when θ = 60° is smaller than the second reflectivity Rf2 when θ = 40°.

As shown in FIG. 8, in the embodiment, the toilet room TR does not have to be rectangular when viewed from above. Also, as shown in FIG. 9, in the embodiment, the reflective surface RS1 of the cabinet main body 10 does not have to be parallel to the right wall RW and the left wall LW of the toilet room TR. Even in these examples, by arranging the radio wave sensor 20 so that the first reflectivity Rf1 is smaller than the second reflectivity Rf2, it is possible to make it easier to detect a human body inside the toilet room TR and harder to detect a human body outside the toilet room TR.

FIG. 10 is a plan view schematically illustrating a modification of the toilet system including the cabinet according to the embodiment.
10, in this example, the toilet room TR has a substantially rectangular shape when viewed from above, and the cabinet main body 10 has a substantially trapezoidal shape when viewed from above.

The radio wave sensor 20 is located on the rear side of the cabinet main body 10 and emits radio waves toward the door TD located on the left wall LW of the toilet room TR. The radio waves emitted from the radio wave sensor 20 are incident on the first reflecting surface RS1 of the cabinet main body 10 at a first incident angle θ1, and then incident on the second reflecting surface RS2 of the wall of the toilet room TR, which is part of the left wall LW, at a second incident angle θ2.

The first reflective surface RS1 is not parallel to the right wall RW and the left wall LW of the toilet room TR. The first reflective surface RS1 is inclined to the right as it moves from the rear to the front. The second reflective surface RS2 is approximately parallel to the left wall LW and the right wall RW of the toilet room TR.

In this example, the first incident angle θ1 is 20 degrees, and the second incident angle θ2 is 40 degrees. As shown in Figure 6, if the first reflectivity Rf1 and the second reflectivity Rf2 are the s-wave reflectivity Rfs, the first reflectivity Rf1 when θ = 20° is smaller than the second reflectivity Rf2 when θ = 40°.

FIG. 11 is a plan view schematically illustrating a modification of the toilet system including the cabinet according to the embodiment.
11, in this example, the toilet room TR has a substantially rectangular shape when viewed from above, and the cabinet main body 10 has a substantially trapezoidal shape when viewed from above.

The radio wave sensor 20 is located on the rear side of the cabinet main body 10 and emits radio waves toward the door TD located on the front wall FW of the toilet room TR. The radio waves emitted from the radio wave sensor 20 are incident on the first reflecting surface RS1 of the cabinet main body 10 at a first incident angle θ1, and then incident on the second reflecting surface RS2 of the wall of the toilet room TR, which is part of the front wall FW, at a second incident angle θ2.

The first reflective surface RS1 is not parallel to the right wall RW and the left wall LW of the toilet room TR. The first reflective surface RS1 is inclined to the right from the rear to the front. The second reflective surface RS2 is approximately parallel to the front wall FW of the toilet room TR.

In this example, the first incident angle θ1 is 20 degrees, and the second incident angle θ2 is 40 degrees. As shown in Figure 6, if the first reflectivity Rf1 and the second reflectivity Rf2 are the s-wave reflectivity Rfs, the first reflectivity Rf1 when θ = 20° is smaller than the second reflectivity Rf2 when θ = 40°.

As shown in Figures 10 and 11, in the embodiment, the first reflectance Rf1 and the second reflectance Rf2 may be the s-wave reflectance Rfs. Even in these examples, by arranging the radio wave sensor 20 so that the first reflectance Rf1 is smaller than the second reflectance Rf2, it is possible to make it easier to detect a human body inside the toilet room TR and harder to detect a human body outside the toilet room TR.

The above describes the embodiments of the present invention. However, the present invention is not limited to these descriptions. Design modifications made by a person skilled in the art to the above-described embodiments are also included within the scope of the present invention as long as they incorporate the features of the present invention. For example, the shape, dimensions, materials, and arrangement of each element of the cabinet are not limited to those illustrated and can be modified as appropriate.
Furthermore, the elements of each of the above-described embodiments can be combined to the extent technically possible, and such combinations are also included within the scope of the present invention as long as they include the features of the present invention.

10 Cabinet body, 20 Radio wave sensor, 30 Lighting unit, 40 Control unit, 50 Hand wash basin, 51 Faucet device, 52 Bowl, 60 Toilet paper holder, 100 Cabinet, 200 Toilet device, 210 Toilet bowl, 220 Toilet seat, 230 Toilet lid, 500 Toilet system, AX Maximum directivity direction, BW Rear wall, DR Door, FS Floor, FW Front wall, LW Left side wall, NV Normal, NV1, NV2 First and second normals, Rf Reflectance, Rf1, Rf2 First and second reflectances, Rfs Reflectance of s waves, Rfp Reflectance of p waves, RS Reflecting surface, RS1, RS2 First and second reflecting surfaces, RW Right side wall, TD door, TP toilet paper, TR toilet room, θ incident angle, θ1, θ2 first and second incident angles

Claims (4)

A cabinet disposed on the side of a toilet bowl inside a toilet room,
The cabinet body,
a radio wave sensor provided inside the cabinet body for detecting a human body in the toilet room;
Equipped with
A cabinet characterized in that the radio wave sensor is installed so that a first incident angle of the P wave of the radio wave when it enters the cabinet body and a second incident angle of the P wave of the radio wave when it enters the wall of the toilet room each exceed the Brewster's angle, and the first incident angle is smaller than the second incident angle , thereby suppressing detection of a human body outside the toilet room more than detecting a human body inside the toilet room. A cabinet disposed on the side of a toilet bowl inside a toilet room,
The cabinet body,
a radio wave sensor provided inside the cabinet body for detecting a human body in the toilet room;
Equipped with
A cabinet characterized in that the radio wave sensor is installed so that a first incident angle of the P wave of the radio wave when it enters the cabinet body and a second incident angle of the P wave of the radio wave when it enters the wall of the toilet room are each less than Brewster's angle, and the first incident angle is greater than the second incident angle , thereby suppressing detection of a human body outside the toilet room in preference to detection of a human body inside the toilet room. The cabinet of claim 1 or 2 further comprises a lighting unit provided at the bottom of the cabinet body that indirectly illuminates the interior of the toilet room based on the detection results of the radio wave sensor. A cabinet as described in claim 1 or 2, characterized in that the radio wave sensor is installed inside the cabinet body other than the area below the hand wash basin.