CN118401727A - Western-style toilet device and toilet seat device - Google Patents

Abstract

A western-style toilet device (1) is provided with a toilet bowl part (44) for receiving excrement, a toilet seat (43), a sitting sensor (23), a human sensor (22), an optical sensor (21), and a foreign matter mixing judgment part (11) for judging that foreign matter (E) is mixed into the toilet bowl part (44), wherein the optical sensor (21) is configured to shoot a falling object into the toilet bowl part (44), and when the human sensor (22) detects a human state and the sitting sensor (23) does not detect a sitting state, the foreign matter mixing judgment part (11) judges whether the falling object is the foreign matter (E) based on an imaging image shot by the optical sensor (21), and when the falling object is judged to be the foreign matter (E), the foreign matter mixing judgment part reports the foreign matter mixing.

Description

Western-style toilet device and toilet seat device

Technical Field

The present invention relates to a western-style toilet device and a toilet seat device.

Background technique

Conventionally, a Western-style toilet device has been proposed that uses a water level sensor to detect abnormal water level in a toilet bowl and outputs an alarm to prompt prompt removal of foreign matter (for example, see Patent Document 1).

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application Publication No. 2000-282538

Summary of the invention

Problems to be solved by the invention

But, water level abnormality means that clogging or a sign of clogging has occurred, so in the detection of this water level abnormality, clogging may not be prevented in advance. In addition, if the detection report of water level abnormality is missed, more serious abnormalities such as water leakage caused by clogging may also occur.

The present disclosure has been made in consideration of such a situation, and an object of the present disclosure is to provide a Western-style toilet device and a toilet seat device that can detect the mixing of foreign matter in the accumulated water earlier and prevent clogging before it occurs.

Means used to solve problems

In order to achieve the above-mentioned purpose, the Western-style toilet device disclosed in the present invention is characterized in that it comprises: a toilet bowl portion for receiving excrement; a toilet seat; a seat sensor; a human sensing sensor; an optical sensor; and a foreign object mixing judgment portion for judging whether a foreign object has mixed into the above-mentioned toilet bowl portion, the above-mentioned optical sensor being a structure for photographing objects falling into the above-mentioned toilet bowl portion, and when the above-mentioned human sensing sensor detects a human state and the above-mentioned seat sensor does not detect a seated state, the above-mentioned foreign object mixing judgment portion judges whether the falling object is a foreign object based on the camera image taken by the above-mentioned optical sensor, and reports the foreign object mixing when it is judged to be a foreign object.

The toilet seat device disclosed in the present invention is a toilet seat device that is assembled into a toilet unit to form a Western-style toilet device. The toilet unit has a toilet bowl portion that receives excrement and a human sensor. The toilet seat device is characterized in that it comprises: an optical sensor; a seat sensor; and a foreign matter mixing judgment unit that judges whether a foreign matter has mixed into the toilet bowl portion. The optical sensor is a structure that captures objects falling into the toilet bowl portion. When the human sensor detects a human state and the seat sensor does not detect a seated state, the foreign matter mixing judgment unit judges whether the falling object is a foreign matter based on the camera image captured by the optical sensor, and reports the foreign matter mixing when it is judged to be a foreign matter.

Effects of the Invention

Since the Western-style toilet device and toilet seat device of the present disclosure have the above-mentioned structure, it is possible to detect the mixing of foreign matter in the accumulated water at an earlier stage and prevent clogging before it occurs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a basic block diagram of a Western-style toilet device according to an embodiment of the present disclosure.

FIG. 2 is a schematic longitudinal sectional view of the western-style toilet device.

FIG. 3 (a) is a schematic three-dimensional view of the western-style toilet device, and (b) is a partial side view of the cleaning nozzle of the local cleaning portion.

4 (a) and (b) are diagrams showing two examples of the installation positions of the optical sensor and the lighting unit in the Western-style toilet device, (a) is a schematic plan view, and (b) is a schematic longitudinal sectional view.

FIG. 5 is a basic flow chart showing the flow of the operation of excrement imaging of the Western-style toilet apparatus.

FIG. 6 is a flow chart showing an operation mode (foreign matter mixing judgment) of the Western-style toilet device.

FIG. 7 is a flow chart showing an operation mode (nozzle contamination determination) of the western-style toilet apparatus.

FIG. 8 is a flow chart showing an operation mode (determination of exhaustion of detergent) of the western-style toilet apparatus.

FIG. 9 is a flow chart showing an operation mode (blockage determination) of the Western-style toilet apparatus.

FIG. 10 is a basic block diagram of a Western-style toilet apparatus and a toilet seat apparatus used therein according to another embodiment of the present disclosure.

FIG. 11 is a schematic longitudinal sectional view of the Western-style toilet apparatus.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

First, a schematic basic structure of the Western-style toilet apparatus 1 according to the present embodiment will be described.

The Western-style toilet device 1 includes a toilet bowl 44 for receiving excrement, a toilet seat 43, a seat sensor 23, a human sensor 22, an optical sensor 21, and a foreign matter mixing judgment unit 11 for judging whether a foreign matter E has mixed into the toilet bowl 44. The optical sensor 21 is a structure for photographing a falling object into the toilet bowl 44. When the human sensor 22 is in a state where a person is detected and the seat sensor 23 is in a state where no seat is detected, the foreign matter mixing judgment unit 11 judges whether the falling object is a foreign matter E based on the camera image photographed by the optical sensor 21, and reports the foreign matter mixing when it is judged to be a foreign matter E.

In addition to the above-mentioned foreign matter mixing judgment function, the Western-style toilet device 1 may also have a function of photographing the excrement received by the toilet bowl 44, and may also have the following three functions. The three functions are a function of judging whether the cleaning nozzle 32a of the local cleaning part 32 is dirty, a function of judging whether the detergent in the detergent tank 55a is exhausted, and a function of judging whether the toilet bowl 44 is blocked.

The Western-style toilet device 1 having the function of photographing excrement may be provided with a toilet bowl portion 44 for receiving excrement, an optical sensor 21, and an excrement image control unit 10. The optical sensor 21 may be configured to photograph excrement falling into the toilet bowl portion 44. The excrement image control unit 10 may be configured to store photographed excrement images, transfer excrement images to other terminals, or perform various analyses based on excrement images.

The Western-style toilet device 1 having a dirt determination function of the cleaning nozzle 32a may be provided with a toilet bowl portion 44 for receiving excrement, a local cleaning portion 32 having a cleaning nozzle 32a, an optical sensor 21, and a dirt determination portion 12 for detecting dirt on the cleaning nozzle 32a. In addition, the imaging range of the optical sensor 21 may include the spraying state of the sprayed water of the cleaning nozzle 32a. The dirt determination portion 12 may be configured to measure the spraying amount based on an image of the spraying state captured by the optical sensor 21, and to determine that the nozzle is dirty when the detected spraying amount does not reach a reference amount, and report that the nozzle is dirty.

As a Western-style toilet device 1 having a detergent exhaustion judgment function, it is sufficient to have a toilet bowl portion 44 for receiving excrement, a detergent tank 55a for storing detergent for supplying bubbles to the accumulated water surface A of the toilet bowl portion 44, and an optical sensor 21. As a Western-style toilet device 1, it is sufficient to also have a detergent exhaustion judgment unit 13 for judging that the detergent in the detergent tank 55a is exhausted. The accumulated water surface in the toilet bowl portion 44 can be included in the imaging range of the optical sensor 21. The detergent exhaustion judgment unit 13 can be configured as follows: based on the image of the accumulated water surface captured by the optical sensor 21 in a water-sealed state, the amount of bubbles on the accumulated water surface is detected, and when the detected amount of bubbles does not reach a reference amount, it is judged that the detergent is exhausted, and the detergent exhaustion is reported.

As a Western-style toilet device 1 with a blockage judgment function, it is sufficient to have a toilet bowl 44 for receiving excrement, an optical sensor 21, and a blockage judgment unit 14 for detecting blockage of the toilet bowl 44. In addition, the accumulated water surface A in the toilet bowl 44 may be included in the imaging range of the optical sensor 21. The blockage judgment unit 14 may be configured to detect the water level of the accumulated water surface A based on an image of the accumulated water surface A captured by the optical sensor 21 in a water-sealed state, and to judge blockage when the detected water level is higher than a reference level, and report the blockage.

The Western-style toilet device 1 according to this embodiment has all the above five functions. As the optical sensor 21 used to realize these functions, a common structure for all the functions can be used.

Next, the detailed structure of the Western-style toilet device 1 will be described.

As shown in Fig. 1, the Western-style toilet device 1 has a CPU 5 constituting the core of computer processing. The CPU 5 performs execution control of various programs, and controls and monitors the operations of the following parts through the execution of the programs. In addition, the Western-style toilet device 1 has a timing unit 7 responsible for various timer processing (periodic processing, delay processing).

The Western-style toilet device 1 includes a waste image control unit 10, a foreign matter mixing determination unit 11, a dirt determination unit 12, a detergent exhaustion determination unit 13, and a clogging determination unit 14 in order to perform the above five functions. Each unit is composed of a program or the like, and performs each function in cooperation with the CPU 5. In addition, the waste image control unit 10 includes an analysis unit 10a that generates waste analysis information based on the waste image captured by the optical sensor 21.

The Western-style toilet device 1 includes various detection units such as an optical sensor 21, a human sensor 22, and a seat sensor 23. The optical sensor 21 is provided as an image sensor (electronic camera) for photographing various objects in order to perform the above five functions. In addition, in the present embodiment, the optical sensor 21 uses a common structure for the above five functions, but it can also be provided separately.

The human sensor 22 is, for example, an infrared sensor, and can detect the presence of a person in the toilet, detect the entry timing to the toilet by changing the sensor state from closed to open, and detect the exit timing by changing the sensor state from open to closed.

As the seat sensor 23, for example, a load sensor for detecting sitting/leaving a seat built into the toilet seat 43, an infrared sensor for detecting sitting/leaving a seat from near the rotation axis of the toilet seat 43, etc., can be cited. The sitting detected by the seat sensor 23 functions as a trigger event for cleaning the toilet cleaning part 31 described later. The trigger event based on the sitting constitutes a cleaning indication mechanism together with the cleaning button for defecation and the cleaning button for urine described later.

The details of the optical sensor 21 will be described later together with the description of Fig. 4. Although the optical sensor 21 is used for excrement analysis, various sensors such as an odor sensor and an electric wave sensor may be provided.

The various detection units 20 include a toilet lid opening/closing detection unit 24 for detecting a stop of the toilet lid 42 at an open/closed position, and a toilet seat opening/closing detection unit 25 for detecting a stop of the toilet seat at an open/closed position.

The Western-style toilet apparatus 1 includes a lighting unit 26 that illuminates the inside of the toilet bowl 44 captured by the optical sensor 21 .

The Western-style toilet device 1 is provided with a reporting unit 27 for reporting various matters to the user. As a form of reporting, for example, a buzzer sounding, a synthesized voice output, an LED display, etc. may be used. In addition, a structure for reporting by sending to a portable terminal (not shown) via a communication unit 28 may also be used. As the communication unit 28, one or both of a short-distance communication unit capable of communication based on, for example, infrared rays, Bluetooth (registered trademark), Wi-Fi, and a long-distance communication unit via the Internet may be used.

The Western-style toilet device 1 includes a storage unit 29. In the storage unit 29, in addition to storing various data such as image data and analysis data captured by the optical sensor 21, a reference image 29a for comparison with the captured image is also stored. The reference image 29a includes, for example, a comparison image for nozzle contamination judgment, a comparison image for detergent exhaustion judgment, and a comparison image for clogging judgment.

The Western-style toilet device 1 includes an operating unit 30. The operating unit 30 includes a defecation cleaning button and a urine cleaning button (both not shown) that output a cleaning instruction to the toilet cleaning unit 31 via the CPU 5 and the program. In addition, as the operating unit 30, a toilet seat operating unit for electrically opening and closing the toilet seat 43 and a toilet cover operating unit for electrically opening and closing the toilet cover 42 are provided (both not shown).

The operation unit 30 is provided with operation switches and operation buttons that can perform various other operations and settings. In addition, it is preferable to configure the operation unit 30 on both the main operation unit (not shown) and the remote controller (not shown). As the remote controller, an infrared communication remote controller is preferably used.

The Western-style toilet apparatus 1 further includes a toilet washing unit 31 and a private washing unit 32. These and other structural units will be described with reference to Figs. 2 and 3 .

The western-style toilet device 1 is a sitting toilet device fixed to the floor or wall in the toilet space. The main body 40 of the western-style toilet device 1 is surrounded by a skirt 41 and contains a toilet bowl portion that opens upward. On the upper side of the toilet bowl portion 44, there are a toilet lid 42 and a toilet seat 43 that are set to the same rotation axis and can be freely erected and laid down relative to the opening surface of the toilet bowl portion 44. The toilet lid 42 and the toilet seat 43 are opened and closed electrically or manually. The operation performed electrically is the operation of each drive unit (not shown) based on the instruction signal from each opening and closing operation unit (not shown) provided on the operation unit 30.

A mechanism portion for supplying cleansing water from the water supply port 46 into the toilet bowl 44 to clean the toilet washing portion 31 in the toilet bowl 44 is arranged in the internal space of the skirt portion 41. The mechanism portion includes a water supply mechanism and a drainage mechanism.

The water supply mechanism comprises: a water supply port 46; a cleaning water supply path 47, which supplies cleaning water supplied from the tap water pipe to the toilet bowl 44 via the water supply port 46; and a water supply valve 48, which is arranged in the middle of the cleaning water supply path 47 to supply or cut off the cleaning water to the toilet bowl 44.

The drainage mechanism of the western-style toilet device 1 of this embodiment is a structure having a movable water return bend 49. The water return bend 49 is rotated by a driving mechanism 50 to form a drainage state or a water sealing state. The water return bend 49 in the figure is in a position where the accumulated water is in a water sealing state, and in the drainage state, it is in a position where the drainage port 49a on the open end side of the water return bend 49 is rotated so that the drainage port 49a is facing the drainage port 52.

In addition, the return bend 49 is surrounded by the return bend housing 51, so that sewage or odor does not leak to the outside. Alternatively, the drainage mechanism may be a siphon type, a jet siphon type, a vortex siphon type, a flushing type, or the like.

In the example of the drawings, the Western-style toilet apparatus 1 is shown as a tankless type without a flush tank (low tank) and directly connected to a water pipe, but a structure with a flush tank may also be adopted.

Furthermore, in the washing water supply path 47, on the downstream side of the water supply valve 48 (on the water supply port 46 side), a bubble forming section 54 is provided for mixing detergent and air bubbles into washing water to form bubbles B. In the present Western-style toilet apparatus 1, the bubble forming section 54 is composed of an air bubble mixing section 56 for mixing air bubbles into washing water and a detergent mixing section 55 for taking detergent out of a detergent tank 55a and mixing it into washing water.

In this Western-style toilet device 1, when a cleaning instruction is given by the cleaning instruction mechanism, the bubble forming unit 54 mixes bubbles B into the cleaning water and supplies the mixed cleaning water to the toilet bowl 44 to form a water storage (water seal) state.

The bubble mixing section 56 includes a sudden pressure change section 56 a having a venturi structure and a gas supply valve 56 b , and has a washing water flow path (not shown) formed therein through which washing water from the washing water supply path 47 flows.

By this, shear force is generated on the boundary surface between the gas and the washing water of the jet flow, and bubbles are generated. Furthermore, in the bubble mixing section 56, negative pressure is generated by the washing water flowing through the washing water flow path, and the gas supplied from the gas supply valve 56b can be effectively mixed into the washing water flowing in the washing water flow path through the ejector effect.

The detergent mixing unit 55 mixes a predetermined amount of detergent into the washing water supply path 47. The detergent mixing unit 55 includes a detergent tank 55a for storing detergent, a detergent supply path 55c connected to the washing water supply path 47, and a detergent supply valve 55b disposed in the middle of the detergent supply path 55c and supplying or shutting off detergent to the washing water supply path 47.

In the present embodiment, the detergent is a surfactant. In addition, a fragrance may be mixed in the detergent so that the fragrance is also mixed in the washing water. In the present embodiment, the detergent mixing section 55 is arranged on the downstream side of the bubble mixing section 56, but it may also be arranged on the upstream side of the bubble mixing section 56. The washing water mixed with the detergent and the bubbles is sprayed into the toilet bowl section 44 from the water supply port 46 of the washing water supply path 47.

In this way, when washing water mixed with detergent and bubbles is supplied to the toilet bowl 44, the bubbles hit the inner surface of the toilet bowl 44. At this time, the dirt in the toilet bowl 44 falls off due to the ultrasonic wave generated by the bursting of the bubbles. Furthermore, since detergent is supplied to the washing water, the inner surface of the toilet bowl 44 is further cleaned.

The bubbles B formed by the detergent and bubbles supplied to the toilet bowl 44 remain on the water-sealed water surface A. The amount of the bubbles B gradually decreases over time. While the bubbles B remain on the water surface A, they clean and protect the inner surface of the toilet bowl 44.

Next, details of the local cleaning unit 32 will be described with reference to FIGS. 2 and 3( a ) and 3 ( b ).

The local washing part 32 has a nozzle housing 32b and a washing nozzle 32a accommodated in the nozzle housing 32b. The nozzle housing 32b is arranged at the rear of the rim portion 45 of the toilet bowl portion 44 (near the shaft portion of the toilet seat 43), and a nozzle cover 45a supported rotatably is provided on the rim portion 45 so as to be openable and closable. The washing nozzle 32a can freely appear and disappear from the nozzle housing 32b, and the nozzle cover 45a is pushed open from the inside and protrudes, and moves to the central side of the toilet bowl portion 44 and stops, and sprays the spray water C from the nozzle opening 32c.

As the washing water used in private washing section 32 , tap water is used, and the water is supplied through a private washing water supply path (not shown) branched from washing water supply path 47 , for example.

The forward and backward movement of the cleaning nozzle 32a of the local cleaning part 32 is performed by the local cleaning operation of the operating part 30. Specifically, if the user performs the local cleaning operation after defecation, the cleaning nozzle 32a advances to the central side of the toilet bowl 44, stops at a predetermined position, and performs the cleaning operation based on the spray water C until the cleaning stop operation is performed. In addition, the local cleaning part 32 of this embodiment performs the nozzle cleaning operation for cleaning the cleaning nozzle 32a itself at regular intervals before and after the cleaning operation.

Next, the structure and mounting position of the optical sensor 21 will be described with reference to (a) and (b) of FIG. 4 .

The optical sensor 21 has an image sensor (electronic camera) and a control circuit (not shown) for controlling the electronic camera. The control circuit is configured to control the light receiving element (not shown) to open an electronic shutter at intervals of 20 to 120 times per second, preferably 20 to 240 times per second, to perform photography.

The optical sensor 21 can be set at various positions such as the toilet bowl 44, for example, as shown in (a) and (b) of Figure 4, it can be configured at various positions such as in the cavity of the rim portion 45 (refer to Figure 2) on the lower surface side of the toilet seat 43.

In this embodiment, as shown in FIG. 4( a), the optical sensor 21 is provided, for example, near the rotation axis of the toilet seat 43 in the rim portion 45 and adjacent to the local cleaning portion 32. The lighting portion 26 is provided adjacent to the optical sensor 21 on the opposite side of the local cleaning portion 32. The lighting portion 26 is used to illuminate the inside of the toilet bowl 44 for photographing. As described later, the lighting timing varies depending on the photographed object, and for example, the lighting can be controlled to be performed in a state such as when the seat is seated or the toilet lid 42 is closed.

As described above, the optical sensors 21 include the accumulated water surface A in the toilet bowl 44, especially the accumulated water surface A in the water-sealed state, as their imaging range. Furthermore, the imaging range may be such that objects falling into the toilet bowl 44, especially objects falling below the ring edge 45 and above the accumulated water surface A, can be captured. Furthermore, the imaging range may include the spraying state of the spray water C of the cleaning nozzle 32a (see FIG. 3 ) (see FIG. 4 (b) above).

In short, the imaging objects of the optical sensor 21 include falling excrement (feces D), foreign matter E mixed into the toilet bowl 44, the spraying state of the sprayed water C of the cleaning nozzle 32a, the state of the bubbles B on the accumulated water surface A, and the water level of the accumulated water surface A in the water-sealed state.

In addition, the excrement to be imaged may include feces D excreted on the inner bottom of the toilet bowl 44 and urine excreted by a man in a standing position. Therefore, the optical sensor 21 may be configured to have an image range from the upper position of the rim 45 to the inner bottom of the toilet bowl 44, or a plurality of optical sensors 21 may be combined to cover such an image range.

Next, the functions of (1) capturing an excrement image, (2) determining foreign matter inclusion, (3) determining nozzle contamination, (4) determining that detergent has run out, and (5) determining clogging will be described with reference to FIGS. 5 to 9 .

Here, the function of (1) is a function of making the object of imaging the excrement (feces D) received by the toilet bowl 44. The function of (2) is a function of making the object of imaging received by the toilet bowl 44 a foreign body E. The function of (3) is a function of making the object of imaging the sprayed water C of the cleaning nozzle 32a. The function of (4) is a function of making the object of imaging the bubbles B on the accumulated water surface A in the toilet bowl 44. The function of (5) is a function of making the object of imaging the water level of the accumulated water surface A.

FIG. 5 is a flowchart showing an example of the execution timing of each function (1) to (5) in time series (steps S1 to S9).

If a person enters the toilet room when the human sensor 22 changes from the closed state to the open state, the optical sensor 21 starts to continuously shoot images of excrement (steps S1 and S2 in FIG. 5 ). The continuous shooting is performed until the person leaves the toilet room (the human sensor 22 changes from the open state to the closed state) (step 6 in FIG. 5 ).

In the Western-style toilet device 1 of this embodiment, during the period from entering the room to leaving the room, the functions of (1) photographing the excrement image (excrement image control) (step S3 of FIG. 5 ), (2) judging the mixing of foreign matter (step S4 of FIG. 5 ), and (3) judging the contamination of the nozzle (step S5 of FIG. 5 ) are performed. In addition, the timings of these functions are different from each other, which will be described later in the description of each part.

(4) The function of judging the exhaustion of detergent (step S7 of FIG. 5 ) detects the state (amount of bubbles) of bubbles B supplied to the toilet bowl 44 in the water-sealed state when the toilet is cleaned. Therefore, considering that bubbles B gradually decrease, it is preferable to perform the function in the initial state of the input of bubbles B. In addition, (5) The function of judging the blockage (step S8 of FIG. 5 ) detects the water level of the cleaning water supplied to the toilet bowl 44 in the water-sealed state when the toilet is cleaned. Therefore, it is preferable to perform the function in the initial state after cleaning.

In this embodiment, these functions are executed at the time of leaving the room (step S6 of FIG. 5 ) when continuous shooting stops, at the same time as the time of leaving the seat, or after a predetermined time (e.g., several seconds). In a structure where the lid 42 is closed at the time of leaving the seat, these functions can also be executed so that the closing of the lid 42 is a trigger event.

In addition, the continuous shooting of the optical sensor 21 may be performed not until the time of leaving the room, but until the later of (4) detergent exhaustion judgment and (5) clogging judgment is completed. That is, since the present western-style toilet device 1 uses the same optical sensor 21 in the execution of the above five functions, it is preferable to use the optical sensor 21 in all functions in a manner that does not repeat the driving/stopping of the continuous shooting more than necessary.

The following describes the operation of each function.

(1) Excrement image control

First, when a person enters the toilet room and the human sensor 22 detects the person entering the toilet room, the optical sensor 21 starts to continuously photograph the inside of the toilet bowl 44. During the period from the time when the human sensor 22 detects the person leaving the toilet room, the excrement images photographed by the optical sensor 21 are taken in a predetermined cycle such as a 100 msec cycle, and the excrement images are sequentially stored in the storage unit 29 together with the date and time. Alternatively, only the images in which excrement is photographed may be stored.

The photographing of the toilet bowl 44 by the optical sensor 21 may be started at the timing when the seat sensor 23 is turned on, instead of the timing of entering/leaving the room, and stopped at the timing when the seat sensor 23 is turned off.

If the occupant excretes, the analysis unit 10a generates excrement analysis information based on the excrement image, and stores the information in association with the excrement image in the storage unit 29. The excrement analysis information may include information generated based on information detected by the odor sensor or the radio wave sensor.

Excrement analysis information may include properties and amount in the case of stool D, and may include amount and urination time in the case of urine. As properties of stool D, it is preferable to detect properties classified by the Bristol stool property classification (hard ball stool, hard stool, slightly hard stool, normal stool, slightly soft stool, muddy stool, and watery stool). The amount of stool, urine, and urination time can be calculated based on excrement images, the number of images, and the like.

Such excrement analysis information may then be transmitted to a management server (not shown) via the communication unit 28 at the timing of the person leaving the room detected by the human sensor 22 .

In addition, the excrement image and excrement analysis information can also be stored in a portable terminal (not shown) via the communication unit 28, or in a USB (not shown) via a USB connection unit (not shown). In addition, since the excrement image involves the privacy of the user, it is of course necessary to obtain permission based on the identification information when sending it to the portable terminal.

If the excrement image and excrement analysis information are associated with each user and stored in this way, the health status can be grasped based on this information. In addition, if this information is stored in a management server (not shown) of a medical institution, it can also be used for diagnosis and treatment.

(2) Judgment of foreign matter mixing

As described above, the foreign matter mixing judgment can be performed during the continuous shooting from entering the room to leaving the room, and the foreign matter mixing judgment unit 11 can operate at a predetermined cycle such as a 100 msec cycle to monitor the mixing of foreign matter into the toilet bowl 44. The following is explained along the flowchart of FIG. 6 (steps S100 to S110).

First, the most recent image continuously taken by the optical sensor 21 is taken in, and the presence or absence of falling objects is determined based on the image data (steps S100 to S102). If there is no falling object, the operation is terminated (No in step S102, S110). If there is falling object, it is determined whether the state of a person is detected by the human sensing sensor 22, and then the seat sensor 23 determines whether the person is sitting on the toilet seat 43 (Yes in step S102, S103, S104). If it is not in the case of human sensing detection, the operation is terminated if the person is sitting (No in step S103, Yes in S104, S110). In addition, as an image for determining whether there is a falling object, a plurality of recent images of the execution timing of the foreign object mixing judgment unit 11 can also be used for judgment.

If the person is being detected and not sitting, that is, if a person enters the room and is not sitting on the toilet seat 43, it is determined that the dropped object is an object (foreign object candidate) other than excrement (stool D or urine under the seat) during sitting (Yes in step S103, No in S104). In this case, a detailed judgment is performed (Yes in step S103, No in S104, S105).

The detailed judgment is to exclude toilet paper and urine from the male standing position from the foreign matter E, and the judgment can be made by at least one of the color, size, and shape of the falling object recognized in the camera image. For toilet paper, for example, it can be judged by color (light color such as white), size (width is larger than stool D), etc. For urine, for example, it can be judged by shape (longer and thinner than stool D) and color (translucent).

If the falling object is determined to be toilet paper or urine in a standing position, it is determined that the falling object is not a foreign body E, and the operation ends (No in step S106, S110). In the case where the falling object is a foreign body E, it is determined that a foreign body E is mixed in the toilet bowl 44, and the situation is reported via the reporting unit 27, and the cleaning prohibition mode is set, and the operation ends (No in step S107, S108-S110).

In addition, as an object that is not a foreign body E, an object other than toilet paper and urine in a standing position can also be considered. The object can also be judged by at least one of color, size, and shape. In addition, an object that is not a foreign body E can also be registered as a comparison image, and the foreign body E can be determined by comparing the camera image with the comparison image.

As a reporting method, buzzer ringing and light flashing can be listed. It can also be a reporting method of notifying the portable terminal via the communication unit 28, and these methods can also be combined. The notification to the portable terminal can be performed by one or both of the short-distance communication unit and the long-distance communication unit.

The flushing prohibition mode is a mode in which the toilet is not flushed even when there is a flushing instruction, that is, the supply of flushing water to the toilet bowl 44 and the drainage from the toilet bowl 44 based on the action of the return bend 49 are not performed. In addition, the action structure may not be set to the flushing prohibition mode.

In addition, with regard to the cleaning prohibition mode, it is preferred that a mode reset button (not shown) is provided on the operating unit 30, and the cleaning prohibition mode is released by operating the mode reset button after the foreign matter is removed. With regard to the buzzer sounding and the light flashing, it is also preferred that the operation is continued until the mode reset button is operated.

By such a foreign matter mixed judgment action, if a foreign matter E is mixed into the toilet bowl 44, the foreign matter mixed will be reported immediately after the foreign matter is mixed, so the user can immediately know that a foreign matter has been mixed. As a result, the user can deal with the foreign matter mixed in early, and the blockage of the toilet bowl 44 caused by the foreign matter E can be prevented before it happens.

In the present embodiment, since the foreign matter mixing determination is an operation started during the period from entering the room to leaving the room (see FIG. 5 ), it is not necessary to determine whether or not human detection is being performed in the predetermined cycle processing of FIG. 6 .

In addition, as a condition for detecting a foreign object candidate, the open state of the toilet lid 42 detected by the toilet lid opening and closing detection unit 24 may be added. In addition, in a structure in which the imaging range of the optical sensor 21 is limited to below the ring edge portion 45, if the toilet lid 42 is closed, the falling object will not be included in the camera image, so the open state of the toilet lid 42 may not be used as a condition.

(3) Nozzle contamination judgment

The nozzle contamination determination may be performed during continuous imaging from entering the chamber to leaving the chamber as described above, and the contamination determination unit 12 may be operated at the start timing of the local cleaning.

First, when a person sits on the toilet seat 43 and performs a cleaning operation, the cleaning nozzle 32a moves toward the center of the toilet bowl 44, and starts to spray cleaning water from the cleaning nozzle 32a toward the local area (steps S200 to S202). During the predetermined time of the spraying, an image captured by the optical sensor 21 that is capturing the inside of the toilet bowl 44 is taken in, and compared with the reference image 29a stored in the storage unit 29 to determine whether there is dirt (steps S203 to S205).

In addition, since the nozzle contamination judgment uses the camera image of the local cleaning unit 32 during cleaning, that is, the inside of the toilet bowl 44 is photographed when the toilet seat 43 is seated, it is preferred that the lighting unit 26 illuminates the inside of the toilet bowl 44 when the toilet seat 43 is seated.

The reference image 29a is image data that captures the appropriate spray state (spray amount) during local cleaning. By comparing the captured image with the spray state of the reference image 29a, it is determined whether the spray amount at the time has reached the appropriate spray amount. For example, by comparing the spray height and spray width of the sprayed water, it can be determined whether the reference amount has been reached or not. In addition, the reference image 29a may not be image data that is actually captured, and may be image data generated by synthesis, for example.

The optical sensor 21 continuously captures images at a rate of about 20 to 240 times per second during the process of spraying water C from the cleaning nozzle 32a. Therefore, it is preferable to extract a plurality of data from the continuously captured images in the predetermined time and compare each of these data with the reference image 29a.

If the spraying amount of the spray water C does not reach the reference spraying amount, it is determined that there is dirt (Yes in step S205). In this case, the dirt is reported via the reporting unit 27, and the cleaning of the special cleaning mode of the cleaning nozzle 32a is performed. If the special cleaning is completed, the local cleaning is restarted and the operation is completed (steps S206 to S210). If it is determined that there is no dirt, the local cleaning is continued and the operation is completed (No in step S205, S209, S210).

If it is determined from the captured image that the area is dirty to the point where water is hardly ejected, the cleaning nozzle 32a may be retracted after special cleaning is performed or without performing special cleaning.

As a reporting method, buzzer ringing and light flashing can be listed. It can also be a reporting method of notifying the portable terminal via the communication unit 28, and these methods can also be combined. The notification to the portable terminal can be carried out via one or both of the short-distance communication unit and the long-distance communication unit.

The special cleaning mode is a cleaning mode that cleans the cleaning nozzle itself, similar to the nozzle cleaning performed before and after the partial cleaning, and is preferably performed at a position behind the partial cleaning position (e.g., the nozzle cleaning position). Examples of the special cleaning mode include cleaning performed for a longer time than the normal nozzle cleaning, cleaning with a larger amount of water per unit time, and cleaning using a detergent.

Thereby, when being judged as having dirt and carrying out special cleaning, cleaning nozzle 32a retreats temporarily, and after special cleaning finishes, advances to a predetermined position for local cleaning. In addition, also can after special cleaning finishes, shoot with optical sensor 21 again, confirm whether dirt has been removed.

In this embodiment, the nozzle contamination judgment is performed during the local cleaning by the user as described above, but it can also be performed during the nozzle cleaning performed before or after the local cleaning. That is, it is also possible to judge whether the discharge amount is appropriate based on the camera image of the discharge state of the nozzle cleaning. In this case, the reference image used as the comparison object is of course an image of the appropriate discharge amount of the nozzle cleaning.

By such nozzle dirt judgment action, the user can find dirt on the cleaning nozzle 32a when actually performing local cleaning. In addition, since the presence or absence of dirt is judged based on the image of the ejection state, the user can quickly know the dirt that causes the ejection abnormality and can deal with it early.

In addition, in order to determine the dirt on the cleaning nozzle 32a, if an image of the dirt on the surface of the cleaning nozzle 32a is used, sometimes the dirt that causes abnormal ejection cannot be detected or the dirt that does not cause abnormal ejection cannot be detected. However, according to the present embodiment, the dirt that directly causes abnormal ejection can be detected.

Furthermore, when it is determined that there is contamination, in addition to the notification, special cleaning is performed to take measures to remove the contamination. Therefore, if the cleaning nozzle can be cleaned by the special cleaning, the local cleaning can be restarted immediately.

(4) Determination of the exhaustion of lotion

The determination of the depletion of lotion can be performed after the person leaves the room or leaves the seat as described above. In addition, the operation of this example is based on the premise that the continuous shooting of the optical sensor has stopped at the leaving room timing. The following is explained along the flowchart of Figure 8 (steps S300 to S307).

First, the lighting unit 26 is turned on, and the optical sensor 21 takes a picture of the inside of the toilet bowl 44, and then the lighting is turned off (steps S300 to S303). The pictures in this case are taken continuously for a predetermined time. By comparing the camera image taken from the optical sensor 21 at this time with the reference image 29a stored in the storage unit 29, it is determined whether the bubbles B have reached the reference amount (step S304).

As a key to judging the appropriate amount of bubbles B, the presence or absence of discontinuity of bubbles B on the water surface A, the surface area of bubbles B, the area of the portion without bubbles B, the thickness of bubbles B at the discontinuity of bubbles B, etc. can be listed as judgment materials, and a reference image 29a based on them can be prepared. In addition, instead of comparing with the reference image 29a, the bubble amount can be numerically calculated based on the presence or absence of discontinuity of bubbles B on the water surface A, the surface area of bubbles B, the area of the portion without bubbles B, the thickness of bubbles B at the discontinuity of bubbles B, etc., and compared with the reference value.

If it is determined that the amount of bubbles has not reached the reference amount, it is determined that the detergent in the detergent box 55a has run out, and the report unit 27 reports this situation, and the operation ends (step S305: Yes, S306, S307). If it is not determined that the detergent has run out, the operation ends (step S305: No, S307).

Regarding the notification method, if it is considered that the user has left the room, preferably, a buzzer is sounded, a notification is made to a portable terminal via the communication unit 28 (preferably a long-distance communication unit), or a combination thereof.

By such detergent exhausting judging action, people need not directly confirm detergent box 55a to exhaust and just can know the replenishment timing of detergent.In addition, owing to be the structure that device itself automatically judges that detergent exhausts, so can reduce the time that people directly confirm detergent box 55a, can replenish detergent to detergent box 55a in time.

The action in this example is a sequence of restarting the optical sensor 21, but it can also be performed during the continuous shooting of the optical sensor 21. In this case, it is sufficient to take in the image data at the execution timing of this judgment. For example, the bubble amount can also be detected based on the latest multiple image data.

(5) Blockage judgment

As described above, the blockage determination may be started after the person leaves the room or leaves the seat. The operation of this example is based on the premise that the continuous imaging of the optical sensor 21 has stopped at the leaving room timing. The following is explained along the flowchart of FIG. 9 (steps S400 to S411).

First, the lighting unit 26 is turned on, and the optical sensor 21 takes a picture of the inside of the toilet bowl 44, and then the lighting is turned off (steps S400 to S403). The shooting in this case is set as continuous shooting for a predetermined time. By comparing the camera image data taken from the optical sensor 21 at this time with the reference image 29a stored in the storage unit 29, it is determined whether the water level in the toilet bowl 44 exceeds the reference level (step S404).

As the reference image 29a, an image of an appropriate water level captured in advance by the optical sensor 21 installed on the toilet bowl 44 may be used, and the reference level may be set to a threshold value above the appropriate level.

If it is determined that the water level exceeds the reference level, it is determined that a blockage has occurred in the toilet bowl 44 or the return bend 49, etc., and the situation is notified from the reporting unit 27, and the cleaning prohibition mode is set, and the action ends (step S405, S406, S407, S411).

About the mode of reporting, if considering that the user has left the room, preferably a buzzer rings, a notification to a portable terminal via a communication unit 28 (preferably a long-distance communication unit), or a combination thereof. In addition, the report based on the flashing of the light can also be continued so that the person knows the abnormality when entering the room.

The flushing prohibition mode is a mode in which the toilet is not flushed even when there is a flushing instruction, that is, the supply of flushing water to the toilet bowl 44 and the drainage from the toilet bowl 44 based on the operation of the return water trap 49. In addition, an operation structure that does not change the setting to the flushing prohibition mode may be used.

In addition, it is preferable that a mode reset button (not shown) is provided on the operating unit 30 for the cleaning prohibition mode, and the cleaning prohibition mode is released by operating the mode reset button after the blockage is eliminated. It is also preferable that the buzzer sounds and the light flashes, and the operation is continued until the mode reset button is operated.

If it is not judged as a blockage, the camera image data is then compared with other reference images 29a (images representing the water seal damage level) to determine whether the water level in the toilet bowl 44 has reached the water seal damage level (lower limit level) (step S408).

As the reference image 29a in this case, an image of the water level at the water seal breaking level may be used, which is pre-photographed by the optical sensor 21 mounted on the toilet bowl 44. Here, the water seal breaking level may be set to a level slightly higher than the water level that actually breaks the water seal.

If it is determined that the water level has not reached the water seal damage level, it is determined to be a water seal damage, and at least one of additional water supply and water seal damage notification is performed, and the action ends (step S409 is yes, S410, S411). If it is not determined to be a water seal damage, the action ends (step S409 is no, S411).

By such a clogging judgment operation, it is possible to easily judge that the water level is abnormal, so it is possible to quickly judge the clogging. In addition, if a plurality of past image data are stored in the storage unit 29, the cause of the water level rise can also be investigated based on these.

Furthermore, in the present embodiment, since the water seal breach level is also checked using images, not only can a response be taken when a blockage occurs, but also the water seal breach can be promptly handled.

The actions of (4) lotion exhaustion judgment and (5) clogging judgment in this example are performed in the order of first restarting the optical sensor 21, but they can also be performed during the continuous shooting of the optical sensor 21. For example, the continuous shooting of the optical sensor 21 can be stopped without stopping at the time of leaving the room, and the continuous shooting can be stopped after the camera images are captured in the actions (4) and (5) after leaving the room.

The Western-style toilet device 1 uses the image obtained by the optical sensor 21 in the above operations (1) to (5), and is configured to use the image obtained by the same optical sensor 21. Therefore, the optical sensor 21 can be effectively utilized. For example, by using the optical sensor 21 provided for photographing excrement to determine the end of detergent, the manufacturing cost of a multifunctional toilet seat having a health management function and a foreign matter mixing monitoring (clogging prevention) function can be reduced.

The Western-style toilet device 1 shown above is a structure in which the toilet cover 42 and the toilet seat 43 are integrated, but it can also be a Western-style toilet device 1A in which the toilet cover 42 and the toilet seat 43 are integrated and can be retrofitted into the toilet unit 61 (see FIGS. 10 and 11 ). The following is explained based on FIGS. 10 and 11 .

The Western-style toilet device 1A has substantially the same components as those of the device of FIG. 1. In addition, in the present embodiment, among these components, the human sensor 22, the operation unit 30, the toilet cleaning unit 31, and the local cleaning unit 32 are provided in the toilet unit 61 (see FIG. 10). In addition, since the detailed structure and operation of the Western-style toilet device 1A are the same as those of FIG. 2 to FIG. 9, the description thereof will be omitted.

The basic structure of the toilet seat device 60 will be described below.

The toilet seat device 60 is assembled to a toilet unit 61 having a toilet bowl 44 for receiving excrement and a human sensor 22, thereby forming a Western-style toilet device 1A. The toilet seat device 60 includes an optical sensor 21, a seat sensor 23, and a foreign matter mixing determination unit 11 for determining whether a foreign matter E has mixed into the toilet bowl 44. The optical sensor 21 is a structure for photographing a falling object into the toilet bowl 44. When the human sensor 22 detects a human state and the seat sensor 23 does not detect a seated state, the foreign matter mixing determination unit 11 determines whether the falling object is a foreign matter E based on the camera image taken by the optical sensor 21, and reports the foreign matter mixing when it is determined to be a foreign matter E.

In addition, one of the optical sensor 21 and the foreign matter mixing determination unit 11 may be provided in the toilet unit 61 instead of being provided in the toilet seat device 60 .

In addition to the above-mentioned foreign matter mixing judgment function, the present Western-style toilet device 1A may also have a function of photographing the excrement received by the toilet bowl 44, and may also have the following three functions. The three functions are a function of judging whether the cleaning nozzle 32a of the local cleaning part 32 is dirty, a function of judging whether the detergent in the detergent tank 55a is exhausted, and a function of judging whether the toilet bowl 44 is blocked.

The Western-style toilet device 1A having the function of photographing excrement may be configured to include a toilet bowl 44 for receiving excrement, an optical sensor 21, and an excrement image control unit 10. The optical sensor 21 may be configured to photograph excrement falling into the toilet bowl 44. The excrement image control unit 10 may be configured to store or transfer the excrement image to another terminal, or to perform various analyses based on the excrement image.

The toilet unit 61 of the Western-style toilet apparatus 1A having the dirt determination function of the cleaning nozzle 32a may be configured to include a toilet bowl 44 for receiving excrement and a local cleaning section 32 having the cleaning nozzle 32a. The toilet seat apparatus 60 described below may be assembled to the toilet unit 61.

The toilet seat device 60 as the Western-style toilet device 1A having the function of judging the contamination of the cleaning nozzle 32a may be configured to include the optical sensor 21 and the contamination judging unit 12 for detecting the contamination of the cleaning nozzle 32a. In addition, the imaging range of the optical sensor 21 may include the spraying state of the sprayed water of the cleaning nozzle 32a. The contamination judging unit 12 may detect the spraying amount based on the image of the spraying state captured by the optical sensor 21, and may judge that the nozzle is contaminated when the detected spraying amount does not reach the reference amount, and report that the nozzle is contaminated.

In addition, in order to achieve this function, one of the optical sensor 21 and the dirt judgment unit 12 can also be set in the toilet unit 61 instead of being set in the toilet seat device 60, and the local cleaning unit 32 can also be set in the toilet seat device 60 instead of being set in the toilet unit 61.

The toilet unit 61 of the Western-style toilet device 1A having the function of judging whether the detergent has run out is a structure having a toilet bowl portion 44 for receiving excrement and a detergent tank 55a for storing detergent for supplying bubbles to the accumulated water surface A of the toilet bowl portion 44. The toilet seat device 60 described below can be assembled on the toilet unit 61.

The toilet seat device 60 of the Western-style toilet device 1A having a detergent exhaustion judgment function may be a structure including an optical sensor 21 and a detergent exhaustion judgment unit 13 for judging that the detergent box 55a is exhausted. The accumulated water surface A in the toilet bowl 44 may be included in the imaging range of the optical sensor 21. The detergent exhaustion judgment unit 13 may be a structure that detects the amount of bubbles on the accumulated water surface A based on the image of the accumulated water surface A photographed by the optical sensor 21 in the water-sealed state, judges that the detergent is exhausted when the detected amount of bubbles does not reach a predetermined amount, and reports that the detergent is exhausted.

In order to realize this function, one of the optical sensor 21 and the detergent end determination unit 13 may be provided in the toilet unit 61 instead of being provided in the toilet seat device 60 .

The toilet unit 61 of the Western-style toilet apparatus 1A having a clogging judgment function may be a structure including a toilet bowl portion 44 for receiving excrement, and the toilet seat apparatus 60 described below may be assembled to the toilet unit 61 .

The toilet seat device 60 as the Western-style toilet device 1A having a blockage judgment function may be a structure including an optical sensor 21 and a blockage judgment unit 14 for detecting blockage of the toilet bowl 44. In addition, the accumulated water surface A in the toilet bowl 44 may be included in the imaging range of the optical sensor 21. The blockage judgment unit 14 may be a structure that detects the water level of the accumulated water surface A based on the image of the accumulated water surface A captured by the optical sensor 21 in a water-sealed state, judges blockage when the detected water level is higher than a predetermined level, and reports the blockage.

In order to realize this function, one of the optical sensor 21 and the clogging determination unit 14 may be provided in the toilet unit 61 instead of being provided in the toilet seat device 60 .

The Western-style toilet apparatus 1A according to the present embodiment has four other functions in addition to the foreign matter mixing determination function. As the optical sensor 21 used to realize these functions, an optical sensor common to all the functions can be used.

Since the operations and effects of the above five functions are the same as those of the Western-style toilet device 1 shown in FIG. 1 , the description thereof will be omitted.

Description of symbols

1. 1A Western-style toilet installation

3 Floor

5 CPU

7 Timing Department

10 Excrement image control unit

10a Analysis Department

11 Foreign matter mixed judgment unit

12 Nozzle contamination detection unit

13 Detergent exhaustion judgment unit

14. Congestion determination unit

20 Various testing departments

21 Optical Sensor

22 Human sensor

23 Seat sensor

24 Toilet cover opening and closing detection unit

25 Toilet seat opening and closing detection unit

26 Lighting Department

27 Reporting Department

28 Communications Department

29 Storage

29a Baseline Image

30 Operation Department

31 Toilet cleaning department

32 Local cleaning department

32a Cleaning nozzle

32b Nozzle housing

32c Nozzle

40 Main body

41 Skirt

42 Toilet lid

43 Toilet seat

44 Potty Department

45 circle edge

45a Nozzle cover

46 Water supply port

47 Cleaning water supply line

48 Water supply valve

49 Backwater

49a Drain

50 Driving mechanism

51 Return bend housing

52 Exhaust

54 Bubble forming part

55 Detergent mixing unit

55a Detergent tank

55b Detergent supply valve

55c Detergent supply line

56 Bubble mixing section

56a Rapid pressure change

56b Gas supply valve

60 Toilet seat device

61 Toilet Unit

A. Water storage

B Bubble

C Spray water

D. Defecation

E Foreign matter

Claims (13)

1. A Western-style toilet device, characterized by comprising: The potty part, which receives excrement; Toilet seat; Seat sensor; Human presence sensor; Optical sensors; and A foreign matter mixing judgment unit judges that a foreign matter has mixed into the above-mentioned toilet bowl unit, The optical sensor is a structure for photographing objects falling into the toilet bowl. When the human sensing sensor detects a person and the seat sensor does not detect a seat, the foreign object mixing judgment unit judges whether the falling object is a foreign object based on the camera image taken by the optical sensor, and reports the foreign object mixing if it is judged to be a foreign object. 2. The Western-style toilet device according to claim 1, characterized in that: The foreign matter mixed determination unit uses at least one of the color, size, and shape of the falling object included in the captured image of the optical sensor as a foreign matter determination criterion. 3. The Western-style toilet device according to claim 2, characterized in that: The foreign matter mixing determination unit detects that the falling object is toilet paper based on the camera image and does not determine the falling object as a foreign matter. 4. The Western-style toilet device according to claim 2 or 3, characterized in that: The foreign matter mixing determination unit detects that the falling object is urine based on the captured image and does not determine the falling object as a foreign matter. 5. The Western-style toilet device according to any one of claims 1 to 4, characterized in that: The foreign matter mixing determination unit prohibits supplying flushing water to the toilet bowl unit when determining that foreign matter is mixed. 6. The Western-style toilet device according to any one of claims 1 to 5, characterized in that: The above-mentioned optical sensor is also used to photograph excrement. 7. A toilet seat device, which is assembled into a toilet unit to form a Western-style toilet device, wherein the toilet unit has a toilet bowl for receiving excrement and a human sensor, wherein the toilet seat device is characterized by comprising: Optical sensors; Seat occupancy sensor; and A foreign matter mixing judgment unit judges that a foreign matter has mixed into the above-mentioned toilet bowl unit, The optical sensor is a structure for photographing objects falling into the toilet bowl. When the human sensing sensor detects a person and the seat sensor does not detect a seat, the foreign object mixing judgment unit judges whether the falling object is a foreign object based on the camera image taken by the optical sensor, and reports the foreign object mixing if it is judged to be a foreign object. 8. The toilet seat device according to claim 7, characterized in that: The foreign matter mixed determination unit uses at least one of the color, size, and shape of the falling object included in the captured image of the optical sensor as a foreign matter determination criterion. 9. The toilet seat device according to claim 8, characterized in that: The foreign matter mixing determination unit detects that the falling object is toilet paper based on the camera image and does not determine the falling object as a foreign matter. 10. The toilet seat device according to claim 8 or 9, characterized in that: The foreign matter mixing determination unit detects that the falling object is urine based on the captured image and does not determine the falling object as a foreign matter. 11. The toilet seat device according to any one of claims 7 to 10, characterized in that: The foreign matter mixing determination unit prohibits supplying flushing water to the toilet bowl unit when determining that foreign matter is mixed. 12. The toilet seat device according to any one of claims 7 to 11, characterized in that: The above-mentioned optical sensor is also used to photograph excrement. 13. The toilet seat device according to any one of claims 7 to 12, characterized in that: One of the optical sensor and the foreign matter mixing determination unit is provided in the toilet unit instead of the one provided in the toilet seat device.