Toilet seat device

Abstract

To smoothly perform closing operation of a toilet seat.SOLUTION: A toilet seat device 100 comprises: a toilet seat 110 which is rotated around a first shaft 111 for opening and closing; toilet seat driving means 120 for driving the toilet seat 110 so as to open / close: toilet seat angle detecting means 161 for detecting an angle of the toilet seat 110 to a first reference angle; and control means 170 for controlling the toilet seat driving means 120. The control means 170 includes: an angle acquisition unit 171 for acquiring an angle of the toilet seat 110 from the toilet seat angle detecting means 161; an angular speed deriving unit 172 for deriving the angular speed of the toilet seat 110; and a driving control unit 173 for controlling operation of the toilet seat driving means 120. The driving control unit 173 causes the toilet seat driving means 120 to generate first torque according to the angular speed of the toilet seat 110 when the toilet seat 110 passes through a prescribed first angle in a closing direction, and controls the toilet seat driving means 120 so as to maintain the closing operation of the toilet seat 110 until the toilet seat 110 is brought into the closed state.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a toilet seat device capable of electrically closing the toilet seat. [Background technology]

[0002] Conventionally, in toilet seat devices that can electrically open and close a toilet seat, the angle of the toilet seat is detected using the position of the toilet seat in a closed state as a reference angle, and when the angle of the toilet seat, which has been manually operated, reaches a specified angle, a motor is started and the toilet seat is automatically rotated in the closing direction (see, for example, Patent Document 1).

[0003] In order to reduce the noise and impact that occurs when the toilet seat is closed or opened, such electric toilet seat devices are controlled to brake the motor or stop the motor drive just before the seat is closed or opened. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-201646 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in recent years, the motors that open and close toilet seats have changed from DC motors to synchronous motors, including servo motors, and the detent torque of the motor can cause the toilet seat to stop at an abnormal angle, resulting in an action that the user does not intend.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a toilet seat device that operates as intended by the user, even when a synchronous motor with high detent torque or a synchronous motor with variation in motor characteristics is used. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, a toilet seat device of the present invention comprises a toilet seat that rotates around a first axis to open and close, a toilet seat drive means that drives the toilet seat to open and close, a toilet seat angle detection means that detects the angle of the toilet seat relative to a first reference angle, and a control means that controls the toilet seat drive means, wherein the control means comprises an angle acquisition unit that acquires the angle of the toilet seat from the angle detection means, an angular velocity derivation unit that derives the angular velocity of the toilet seat based on the output from the angle acquisition unit, and a drive control unit that controls the operation of the toilet seat drive means, and the drive control unit controls the toilet seat drive means to generate a first torque corresponding to the angular velocity of the toilet seat when the toilet seat passes a predetermined first angle in the closing direction, and to maintain the closing operation of the toilet seat until the toilet seat is in a closed state. Effect of the Invention

[0008] According to the present invention, even if there is variation in motor characteristics such as detent torque, the toilet seat can be closed smoothly as intended by the user. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side view showing a toilet seat device attached to a toilet bowl according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram illustrating a functional configuration of the toilet seat device. [Diagram 3] FIG. 2 is a block diagram showing a functional configuration of a control means. [Figure 4] FIG. 2 is a side view showing a schematic view of the toilet seat in an open state. [Diagram 5] FIG. 11 is a side view showing a schematic state of the toilet seat after passing a first angle. [Figure 6] FIG. 2 is a side view showing a schematic diagram of the toilet lid in an open state. [Figure 7] A side view showing the state of the toilet lid after passing the second angle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the toilet seat device according to the present invention will be described with reference to the drawings. Note that the following embodiment is an example for explaining the present invention, and is not intended to limit the present invention. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical expressions, the contents of each step in the method, and the order of each step shown in the following embodiment are examples, and may include contents not described below. In addition, geometric expressions such as parallel and orthogonal may be used, but these expressions do not indicate mathematical strictness, and include errors, deviations, etc. that are substantially acceptable. In addition, expressions such as simultaneous and identical also include a substantially acceptable range.

[0011] In addition, the drawings are schematic diagrams in which emphasis, omissions, or ratios have been appropriately adjusted in order to explain the present invention, and the shapes, positional relationships, and ratios are different from the actual ones.

[0012] In addition, in the following, a plurality of inventions may be collectively described as one embodiment, and some of the contents described below are described as optional components related to the present invention.

[0013] 1 is a side view showing a toilet seat device 100 attached to a toilet bowl 200 according to this embodiment. The toilet seat device 100 is attached to the upper surface of the toilet bowl 200 and forms a seat surface for a person to sit on, and comprises a toilet seat 110 and a toilet seat drive means 120. In this embodiment, the toilet seat device 100 comprises a toilet lid 130, a occupancy detection means 140, and a sanitary washing device 150.

[0014] The toilet 200 is a so-called Western-style toilet on which a user can sit to relieve themselves, with a flush water tank 220 fixed to the rear of the toilet bowl 210 and the toilet seat device 100 mounted on top of the toilet bowl 210.

[0015] The sanitary washing device 150 is a device that can heat water to create hot water and spray the created hot water from a nozzle. The nozzle is usually placed in a predetermined location behind the toilet seat device 100, and can be caused to protrude to a predetermined position according to instructions input by the user.

[0016] Toilet seat 110 is a member that forms a U-shaped or O-shaped seating surface above toilet bowl 210, and rotates about a first axis 111 to open and close relative to toilet bowl 210.

[0017] Toilet lid 130 is a member that covers and conceals toilet seat 110 above toilet seat 110, and rotates around second shaft 132 to open and close relative to toilet bowl 210. In this embodiment, first shaft 111 and second shaft 132 are arranged parallel to each other, however, first shaft 111 and second shaft 132 may be arranged on the same axis.

[0018] 2 is a diagram showing a schematic functional configuration of the toilet seat device 100, including the toilet seat drive means 120. The toilet seat drive means 120 is a device that drives the toilet seat 110 to open and close, and includes a motor 121. In this embodiment, the toilet seat drive means 120 includes the motor 121 and a first transmission mechanism 122.

[0019] A motor that generates a detent torque is adopted as the motor 121. For example, the motor 121 is a synchronous motor, and examples of the motor 121 include a servo motor and a stepping motor.

[0020] The first transmission mechanism 122 transmits the output of the motor 121 to the toilet seat 110 by a combination of mechanical elements. For example, the first transmission mechanism 122 is a reduction mechanism, and specific examples thereof include a combination of gears and a belt drive.

[0021] In this embodiment, the toilet seat drive means 120 also functions as a toilet lid drive means. Specifically, the toilet seat drive means 120 includes a second transmission mechanism 124 that transmits the output of the motor 121 to the toilet lid 130, and a switching mechanism 123 that transmits the output of the motor 121 to either the first transmission mechanism 122 or the second transmission mechanism 124. In other words, the toilet seat drive means 120 can open and close the toilet seat 110, and can open and close the toilet lid 130 as a toilet lid drive means by switching. Alternatively, the toilet seat drive means 120 may include a first motor and a second motor, and the first motor may drive the toilet seat via the first transmission mechanism, and the second motor may drive the toilet lid via the second transmission mechanism.

[0022] As shown in FIG. 2, the toilet seat device 100 includes a toilet seat angle detection means 161, a toilet lid angle detection means 162, and a control means 170.

[0023] The toilet seat angle detection means 161 is a sensor that is attached around the first axis 111 of the toilet seat 110 and detects the angle of the toilet seat 110 relative to a first reference angle. The type of toilet seat angle detection means 161 is not particularly limited, but in the present embodiment, a potentiometer is used. The toilet seat angle detection means 161 may also be a rotary encoder or the like. The first reference angle is an angle (position) that serves as a reference for detecting the opening and closing angle of the toilet seat 110. In the present embodiment, the output value of the toilet seat angle detection means 161 when the toilet seat 110 is in a closed state, that is, when the toilet seat 110 is in contact with the upper end surface of the toilet bowl 210, is used as the first reference angle.

[0024] The toilet lid angle detection means 162 is a sensor attached around the second axis 132 of the toilet lid 130, and detects the angle of the toilet lid 130 relative to the second reference angle. The type of toilet seat angle detection means 161 is not particularly limited, but in this embodiment, the same potentiometer as the toilet seat angle detection means 161 is used. The second reference angle is the angle (position) that serves as the reference for detecting the opening and closing angle of the toilet lid 130. In this embodiment, the second reference angle is the output value of the toilet lid angle detection means 162 when the toilet lid 130 is in a closed state, that is, when the toilet lid 130 is in contact with the toilet seat 110 that is in contact with the upper end surface of the toilet bowl 210.

[0025] The human detection means 140 is a so-called human presence sensor that detects the presence of a person around the toilet seat device 100, particularly in front of the toilet seat device 100, and detects operation information, seating information, etc., and the human presence sensor is separate from the main body and is installed in the toilet space. There are no particular limitations on the type of human detection means 140, but in this embodiment, a pyroelectric sensor is used as the human presence sensor.

[0026] 3 is a block diagram showing the functional configuration of control means 170. Control means 170 includes a processor, and includes, as processing units realized by causing the processor to execute a program, an angle acquisition unit 171, an angular velocity derivation unit 172, and a drive control unit 173. In this embodiment, control means 170 includes a presence acquisition unit 174, a timing unit 175, and a reference angle update unit 176.

[0027] The angle acquisition unit 171 acquires the angle of the toilet seat 110 from the first reference angle from the toilet seat angle detection means 161. In the case of this embodiment, the angle acquisition unit 171 acquires the angle of the toilet lid 130 from the second reference angle from the toilet lid angle detection means 162. The angle acquisition unit 171 stores the output value of the toilet seat angle detection means 161 at the first reference angle as a first reference value, and acquires the difference from the first reference value as the angle of the toilet seat 110. The angle acquisition unit 171 also stores the output value of the toilet lid angle detection means 162 at the second reference angle as a second reference value, and acquires the difference from the second reference value as the angle of the toilet lid 130. Note that the angle acquisition unit 171 does not grasp the actual angles of the toilet seat 110 and the toilet lid 130, but grasps the angle by a value that can be linearly converted into an angle. In other words, the angle in this specification and the claims includes the angle and a value that can be converted into an angle.

[0028] Angular velocity derivation unit 172 derives the angular velocity of toilet seat 110 based on the output from angle acquisition unit 171. For example, angular velocity derivation unit 172 may acquire angles from angle acquisition unit 171 at a predetermined time interval and derive the difference between the two angles (strictly speaking, the value obtained by dividing the difference between the two angles by the predetermined time angle) as the angular velocity. In addition, the timing for acquiring angles sequentially may be acquired from clock unit 175, and the angular velocity may be derived using the difference between the two angles acquired at different times and the difference in timing. Angular velocity derivation unit 172 similarly derives the angular velocity of toilet lid 130 based on the output from angle acquisition unit 171. Note that, in this specification and the claims, angular velocity also includes a value that can be converted to a correct angular velocity, just like an angle.

[0029] The drive control unit 173 controls the toilet seat drive means 120 to generate a first torque corresponding to the angular velocity of the toilet seat 110 derived by the angular velocity derivation unit 172 when the toilet seat 110 passes a predetermined first angle in the closing direction, and to maintain the closing operation of the toilet seat 110 until the toilet seat 110 is in the closed state. The drive control unit 173 also controls the toilet seat drive means 120, which functions as the toilet lid drive means, to generate a second torque corresponding to the angular velocity of the toilet lid 130 when the toilet seat 110 is in the closed state and the toilet lid 130 passes a predetermined second angle in the closing direction, and to maintain the closing operation of the toilet lid 130 until the toilet lid 130 is in the closed state. A specific example of the operation will be described later.

[0030] In the present embodiment, since the toilet seat 110 and the toilet lid 130 cannot be driven simultaneously, when performing this operation, the drive control unit 173 controls the operation of the toilet lid 130 after the toilet seat 110 is closed.

[0031] The presence acquisition unit 174 acquires the presence of a person around the toilet seat 110 from the person detection means 140. For example, the presence acquisition unit 174 outputs a value according to the output of the person detection means 140, such as setting an on flag while the person detection means 140 is detecting a person, and setting an off flag while the person detection means 140 is not detecting a person.

[0032] Drive control section 173 causes toilet seat drive means 120, which also functions as toilet lid drive means, to generate a third torque for driving toilet lid 130 in the closing direction after a predetermined first time from the timing when presence acquisition section 174 changes from an on flag to an off flag based on the timing information of timer section 175. The first time is not particularly limited, but is selected from a range of 1 minute or more and 10 minutes or less (for example, 5 minutes).

[0033] By executing this operation, the control means 170 can reliably bring the toilet seat 110 together with the toilet lid 130 into a closed state even if the toilet seat 110 or toilet lid 130 stops at an abnormal angle without being closed.

[0034] The reference angle update unit 176 updates the first reference angle stored in the angle acquisition unit 171 based on the angle acquired by the angle acquisition unit 171 from the toilet seat angle detection means 161 when the toilet seat 110 is in the closed state. In the case of this embodiment, the reference angle update unit 176 updates the second reference angle stored in the angle acquisition unit 171 based on the angle acquired by the angle acquisition unit 171 from the toilet lid angle detection means 162 when the toilet lid 130 is in the closed state. The timing of updating the first reference angle and the second reference angle is not particularly limited, but an example is a case where the angle is updated after the closing operation of the toilet seat 110 and the toilet lid 130, which is executed after the first time has elapsed since people left the vicinity of the toilet seat device 100. This makes it possible to update the respective reference angles when it is highly likely that the toilet seat 110 and the toilet lid 130 are in the closed state. In addition, even if the toilets are attached to toilets 200 of different shapes, the respective reference angles can be flexibly determined.

[0035] Next, the flow of processing from the open state to the closed state of the toilet seat 110 will be described. FIG. 4 is a side view that shows a schematic of the toilet seat 110 in the open state. Here, the first reference angle is the angle in the closed state, and is, for example, a position of 0 degrees (horizontal). The toilet seat 110 in the open state stops at a position that is greater than 90 degrees with respect to the first reference angle. For example, the open state of the toilet seat 110 is, for example, 108 degrees. Note that the first reference angle may not be constant since it is updated by the reference angle update unit 176.

[0036] Next, the user moves only the toilet seat 110, or the toilet seat 110 and the toilet lid 130, with their hands until the toilet seat 110 reaches a first angle, as shown in Figure 5. The first angle is, for example, 70 degrees.

[0037] At this stage, the angle acquisition unit 171 determines from the toilet seat angle detection means 161 that the toilet seat 110 has passed the first angle in the closing direction, and the angular velocity derivation unit 172 derives the angular velocity ω1.

[0038] The drive control unit 173, which has acquired the angular velocity ω1, causes the toilet seat drive means 120 to generate a first torque corresponding to the angular velocity ω1 of the toilet seat 110, and moves the toilet seat 110 in the closing direction.

[0039] Here, the control means 170 determines a target angular velocity when the toilet seat driving means 120 moves the toilet seat 110 in the closing direction. There may be one or more target angular velocities. In the present embodiment, three areas, Area A, Area B, and Area C, are provided from the open state to the closed state, and a first target angular velocity is set for Area A, a second target angular velocity for Area B, and a third target angular velocity for Area C. The relationship between these magnitudes is first target angular velocity>second target angular velocity>third target angular velocity. The drive control unit 173 controls the toilet seat driving means 120 to follow each target angular velocity even when the toilet seat 110 automatically changes from the open state to the closed state.

[0040] When the user moves the toilet seat 110 through the first angle at angular velocity ω1, the drive control unit 173 generates a first torque in the toilet seat drive means 120 such that the first target angular velocity of the area A including the first angle is reached. When the angular velocity ω1 is equal to or greater than the first target angular velocity, the drive control unit 173 generates a braking first torque in the toilet seat drive means 120, and when the angular velocity ω1 is less than the first target angular velocity, the drive control unit 173 generates an assisting first torque in the toilet seat drive means 120.

[0041] Angle acquisition unit 171 sequentially acquires the angle of toilet seat 110 until toilet seat 110 is in a closed state, and angular velocity derivation unit 172 derives angular velocity ω1 each time. Drive control unit 173 generates a first torque to achieve a first target angular velocity while toilet seat 110 is operating in area A, generates a fourth torque to achieve a second target angular velocity while toilet seat 110 is operating in area B, and generates a fifth torque to achieve a third target angular velocity while toilet seat 110 is operating in area C.

[0042] As a result, even when the user places his / her hand on the toilet seat 110, or when the toilet seat 110 is closed automatically, it is possible to close the toilet seat 110 smoothly. When the user operates the toilet seat 110, the range from the open state to the first angle is within area A, but the drive control unit 173 does not perform control to generate torque.

[0043] Next, the process flow from when the toilet lid 130 is opened to when it is closed will be described. FIG. 6 is a side view showing the toilet lid 130 in an open state. Here, the second reference angle is the angle in the closed state, which is the 0 degree position (horizontal). When the toilet lid 130 is open, it stops at a position greater than 90 degrees relative to the second reference angle. For example, the open state of the toilet lid 130 is 102 degrees. The second reference angle depends on the first reference angle and is updated by the reference angle update unit, so it may not be constant.

[0044] Next, the user manually moves the toilet lid 130 alone, or the toilet lid 130 and the toilet seat 110 together, until the toilet lid 130 reaches a second angle, as shown in Figure 7. The second angle is, for example, 70 degrees.

[0045] At this stage, the angle acquisition unit 171 determines from the toilet lid angle detection means 162 that the toilet lid 130 has passed the second angle in the closing direction, and the angular velocity derivation unit 172 derives the angular velocity ω2.

[0046] Having acquired the angular velocity ω2 and confirmed that the toilet seat 110 is in the closed state, the drive control unit 173 generates a second torque corresponding to the angular velocity ω2 of the toilet lid 130 in the toilet seat drive means 120, causing the toilet lid 130 to move in the closing direction. Note that when the user moves the toilet lid 130 and the toilet seat 110 simultaneously, the toilet lid 130 may move in the closing direction due to its own weight while the toilet seat 110 is moving in the closing direction.

[0047] Here, the control means 170 determines a target angular velocity when the toilet seat driving means 120, which also functions as the toilet lid driving means, moves the toilet lid 130 in the closing direction. There may be one or more target angular velocities. In the present embodiment, three areas, Area D, Area E, and Area F, are provided from the open state to the closed state, and a fourth target angular velocity is set for Area D, a fifth target angular velocity for Area E, and a sixth target angular velocity for Area F. The relationship between these magnitudes is fourth target angular velocity>fifth target angular velocity>sixth target angular velocity. The drive control unit 173 controls the toilet seat driving means 120 to follow each target angular velocity even when the toilet lid 130 automatically changes from the open state to the closed state.

[0048] For example, when the toilet seat 110 is in the closed state and the user moves the toilet lid 130 through the second angle at angular velocity ω2, the drive control unit 173 causes the toilet seat drive means 120 to generate a second torque that results in a fourth target angular velocity of area D that includes the second angle. When the angular velocity ω2 is equal to or greater than the fourth target angular velocity, the drive control unit 173 generates a braking second torque, and when the angular velocity ω2 is less than the fourth target angular velocity, the drive control unit 173 generates an assisting second torque.

[0049] Angle acquisition unit 171 sequentially acquires the angle of toilet lid 130 until toilet lid 130 is closed, and angular velocity derivation unit 172 derives angular velocity ω2 each time. Drive control unit 173 generates a second torque to achieve a fourth target angular velocity while toilet lid 130 is operating in area D, generates a sixth torque to achieve a fifth target angular velocity while toilet lid 130 is operating in area E, and generates a seventh torque to achieve the sixth target angular velocity while toilet lid 130 is operating in area F.

[0050] As a result, the toilet lid 130 can be closed smoothly even when the user places their hand on the toilet lid 130 or when the toilet lid 130 is closed automatically. When the user operates the toilet lid 130, the range from the open state to the second angle is within area D, but the drive control unit 173 does not perform control to generate torque.

[0051] Furthermore, if the user uses force to stop the movement of the toilet seat 110 when the toilet seat 110 enters area C, or if the toilet lid 130 is lifted slightly from the closed state, the toilet seat 110 or the toilet lid 130 may not be in the closed state due to an unforeseen event. In this case, the drive control unit 173 controls the toilet seat drive means 120 to cause the toilet lid 130 to perform a closing operation a predetermined time (e.g., 5 minutes) after the user leaves the toilet and there are no more people around the toilet seat device 100. This ensures that the toilet seat 110 and the toilet lid 130 are closed.

[0052] By performing the above-described control, it is possible to realize simple control when the user closes the toilet seat 110 and the toilet lid 130, and control when the toilet seat 110 and the toilet lid 130 close automatically.

[0053] The present invention is not limited to the above-described embodiment. For example, the components described in this specification may be combined in any manner, or some of the components may be removed to create another embodiment of the present invention. In addition, the present invention also includes modifications that are made to the above-described embodiment by those skilled in the art without departing from the spirit of the present invention, i.e., the meaning of the words in the claims.

[0054] For example, the case has been described in which the open state, the closed state and the closed state are divided into three areas and different controls are performed for each area, but the number of areas may be one, two, or even four or more.

[0055] Also, in the above description, the toilet lid 130 is operated to close together with the toilet seat 110 a predetermined time after the person leaves the room, but the toilet lid 130 may be closed after the toilet seat 110 is closed. If the toilet seat 110 and the toilet lid 130 can be driven simultaneously, they may be controlled to close simultaneously.

[0056] Furthermore, the toilet seat opening / closing means 120 and the toilet lid opening / closing means may each be provided with a motor, and may be capable of driving the toilet seat 110 and the toilet lid 130 simultaneously. [Industrial Applicability]

[0057] INDUSTRIAL APPLICABILITY The present invention can be applied to a toilet seat device that can automatically close the toilet seat and toilet lid. [Explanation of symbols]

[0058] 100 Toilet seat device 110 Toilet seat 111 First axis 120 Toilet seat drive means 121 Motor 122 First transmission mechanism 123 Switching Method 124 Second transmission mechanism 130 Toilet lid 132 Second axis 140 Person Detection Methods 150 Sanitary cleaning equipment 161 Toilet seat angle detection means 162 Toilet lid angle detection means 170 Control Means 171 Angle acquisition part 172 Angular velocity derivation part 173 Drive control unit 174 Existence acquisition part 175 Timing section 176 Reference angle update section 200 Toilet 210 Toilet Bowl 220 Cleaning water tank

Claims

1. A toilet seat that rotates around a first axis to open and close; A toilet seat driving means for driving the toilet seat to open and close; a toilet seat angle detection means for detecting an angle of the toilet seat relative to a first reference angle; A control means for controlling the toilet seat driving means, The control means an angle acquisition unit that acquires the angle of the toilet seat from the toilet seat angle detection means; an angular velocity derivation unit that derives an angular velocity of the toilet seat based on an output from the angle acquisition unit; A drive control unit that controls the operation of the toilet seat drive means, The drive control unit is When the toilet seat passes through a predetermined first angle in the closing direction, if the angular velocity of the toilet seat is equal to or greater than a first target angular velocity, the drive control unit generates a brake-like first torque in the toilet seat drive means, and if the angular velocity of the toilet seat is less than the first target angular velocity, the drive control unit generates an assist-like first torque in the toilet seat drive means, thereby controlling the toilet seat drive means to maintain the closing operation of the toilet seat until the toilet seat is in a closed state. Toilet seat device.

2. A toilet lid that rotates around a second axis parallel to the first axis to open and close; A toilet lid driving means for driving the toilet lid to open and close; a toilet lid angle detection means for detecting an angle of the toilet lid relative to a second reference angle, The angle acquisition unit is The toilet lid angle is obtained from the toilet lid angle detection means; The angular velocity derivation unit is Deriving an angular velocity of the toilet lid based on an output from the angle acquisition unit; The drive control unit is When the toilet seat is in a closed state and the toilet lid passes a predetermined second angle in the closing direction, a second torque corresponding to the angular velocity of the toilet lid is generated in the toilet lid drive means, and the toilet lid drive means is controlled to maintain the closing operation of the toilet lid until the toilet lid is in a closed state.

2. A toilet seat apparatus as claimed in claim 1.

3. A person detection means for detecting the presence of a person around the toilet seat is provided, The control means a presence acquisition unit that acquires the presence of a person around the toilet seat from the person detection means, The drive control unit is A third torque in the closing direction is generated in the toilet lid driving means after a first predetermined time has elapsed since the state in which a person is present changes to a state in which no person is present.

3. A toilet seat apparatus as claimed in claim 2.

4. The control means A reference angle update unit updates the first reference angle based on the angle acquired from the toilet seat angle detection means when the toilet seat is in a closed state. A toilet seat apparatus according to any one of claims 1 to 3.

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