JP2006101933A - Electric opening/closing device for toilet seat or toilet lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric opening/closing device for a toilet seat or a toilet lid which suppresses a torque by inertia occurring right after the start of an opening action of the toilet seat or the toilet lid, and at the same time, can perform a smooth opening action. <P>SOLUTION: This electric opening/closing device for the toilet seat or the toilet lid comprises a rotary shaft which rotates together with the toilet seat or the toilet lid, a DC motor which rotates the rotary shaft respectively in the normal and reverse directions, and a driving circuit for driving the motor. The electric opening/closing device for the toilet seat or the toilet lid opens/closes the toilet seat or the toilet lid by transmitting the driving force of the motor to the rotary shaft through a speed reduction gear train. In the electric opening/closing device for the toilet seat or the toilet lid, a motor driving control is performed in such a manner that when the toilet lid is driven in the opening direction, the driving motor is driven at a low Duty rate for a specified period of time until the toilet seat or the toilet lid starts opening, and then, the Duty rate is increased in steps, and the Duty rate is made 100% in a next specified period of time. By performing this kind of control, the inertia torque occurring right after the opening motion of the toilet seat or the toilet lid can be suppressed, and at the same time, the smooth opening action without a feeling of incongruity to a user can be performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric opening / closing device for a toilet seat or toilet lid in a Western-style toilet, and more particularly to a device for electrically opening / closing an toilet seat and a toilet lid individually.

  Conventionally, an electric opening / closing device of a toilet seat or toilet lid performs high acceleration rotation from the start of opening operation when the toilet seat or toilet lid is opened, and then low acceleration rotation, deceleration rotation, etc. according to the opening angle of the toilet seat or toilet lid, etc. Control has been performed such that the drive torque is set to a high value after the opening operation starts, and then gradually reduced, such as high-speed rotation (see, for example, Patent Document 1). Immediately after the toilet seat or toilet lid opening operation starts, the torque applied to the transmission means from the drive motor to the transmission shaft is originally the load torque depending on the weight and center of gravity of the toilet seat or toilet lid, the reduction gear train, the rotating shaft, etc. The torque generated by the distortion of the transmission means and the inertia torque generated when the stopped state starts to move are combined, and the torque generated when the toilet seat or toilet lid opens is the maximum torque.

  In the electric opening / closing device of the toilet seat or toilet lid, since the driving torque is set high immediately after the opening operation starts, the angular acceleration at the moment when the toilet seat or / and the toilet lid starts to open increases, and the inertia torque becomes maximum. For this reason, the maximum torque is larger, and each opening operation of the toilet seat or toilet lid causes excessive stress on the transmission means such as the drive unit and the reduction gear train, causing damage and wear. In addition, as a countermeasure, it has been necessary to select a transmission means having a more robust material and structure that can withstand excessive stress, and has become expensive.

JP 2003-265359 A

  The present invention has been made to solve the above problems, the problem of the present invention is to reduce the maximum torque applied to the transmission means by suppressing the inertia torque generated at the moment when the toilet seat or toilet lid starts to open, Provided is an electric opening / closing device for a toilet seat or a toilet lid, which can provide a smooth opening feeling without causing a sense of incongruity for a user.

  To achieve the above object, according to the first aspect of the present invention, a rotating shaft that rotates together with a toilet seat or a toilet lid, a DC motor that rotates the rotating shaft in forward and reverse directions, and the motor are driven. A toilet seat or a toilet lid electric opening and closing device that opens and closes the toilet seat or toilet lid by transmitting the driving force of the motor to the rotary shaft via a reduction gear train. When driving in the opening direction, control is performed so that the driving motor operates at a first driving torque lower than the maximum driving torque of the driving motor until the first predetermined time after the opening operation is started. The angular acceleration at the moment when the toilet lid starts to open is reduced, and the inertia torque can be suppressed, and the maximum torque applied to the transmission means can be reduced. Therefore, the stress applied to the transmission means such as the reduction gear train can be reduced by the opening operation of the toilet seat or the toilet lid, and the life can be extended.

  According to a second aspect of the present invention, after the first predetermined time has elapsed, the driving torque is increased stepwise from the first driving torque, and reaches the second driving torque in the second predetermined time. By performing this control, the opening speed of the toilet seat or toilet lid gradually increases until the second driving torque is reached in the second predetermined time. Even if the first driving torque is set low with respect to the delay of the operation time, there is almost no influence, and it is possible to obtain a smooth opening operation feeling without giving the user a sense of incongruity.

  According to a third aspect of the present invention, the first drive torque is controlled so that the toilet seat or the toilet lid can be driven as a first drive torque that can be opened from the closed state to the opening direction. By doing so, the toilet seat or the toilet lid can be reliably opened even with the first driving torque. Therefore, if the first driving torque is the minimum torque that can open the toilet seat or the toilet lid, the inertia torque can be suppressed to the minimum, and the first predetermined time can be reduced with the backlash and the transmission shaft of the transmission means. Even if the length of the fitting part of the toilet seat and the variation in the speed of the drive motor are taken into consideration, the phenomenon that the toilet seat or the toilet lid does not open for the first predetermined time can be eliminated, and the user feels uncomfortable. No more giving.

  According to a fourth aspect of the present invention, the first predetermined time is added to the transmission means via the reduction gear train that is generated until the toilet seat or toilet lid starts to open from the closed state to the opening direction side. By controlling the time longer than the time when the torque is maximized as the first predetermined time, the moment when the toilet seat or the toilet lid, which is the point at which the inertia torque becomes the largest, starts to open from the closed state is surely ensured. It is possible to operate with driving torque.

  According to a fifth aspect of the present invention, the second predetermined time is applied to the transmission means while the drive torque is gradually increased from the first drive torque to the second drive torque. The first predetermined time is defined as the second predetermined time, which is the amount of change in the drive torque that does not exceed the maximum torque applied to the transmission means generated within the first predetermined time. Even after the lapse, the opening speed of the toilet seat or the toilet lid increases stepwise, so that there is no sudden speed fluctuation during the second predetermined time, and the inertia torque can be suppressed.

  According to the invention described in claim 6, the rotating shaft that rotates together with the toilet seat or the toilet lid, the DC motor that rotates the rotating shaft in the forward and reverse directions, and the drive circuit for driving the motor, The toilet seat or toilet lid is electrically driven by an angle detecting means for detecting an opening / closing angle of the toilet seat or the toilet lid, and the driving force of the motor is transmitted to the rotating shaft via a reduction gear train to open and close the toilet seat or the toilet lid. In the opening / closing device, when the toilet seat or the toilet lid is driven in the opening direction, the driving motor operates at a first driving torque lower than the maximum driving torque of the driving motor up to a first predetermined angle after the opening operation starts. By performing the control as described above, the angular acceleration at the moment when the toilet seat or the toilet lid starts to open can be reduced, the inertia torque can be suppressed, and the maximum torque applied to the transmission means can be reduced. Therefore, the opening operation of the toilet seat or the toilet lid can reduce the stress applied to the driving means such as the reduction gear train, thereby extending the life.

  According to a seventh aspect of the present invention, after reaching the first predetermined angle, the drive torque is increased stepwise from the first drive torque, and reaches the second drive torque at the second predetermined angle. By performing the control, the opening speed of the toilet seat or the toilet lid gradually increases until the second driving torque is reached at the second predetermined angle, so that the toilet seat or the toilet lid is opened to the open end position. Even if the first driving torque is set to be low with respect to the delay of the operation time, there is almost no influence, and it is possible to obtain a smooth opening operation feeling without giving the user a sense of incongruity.

  According to an eighth aspect of the present invention, the first drive torque is controlled so that the toilet seat or the toilet lid can be opened from the closed state to the opening direction side as a first drive torque. By doing so, the toilet seat or the toilet lid can be reliably opened even with the first driving torque. Therefore, if the first driving torque is the minimum torque that can open the toilet seat or the toilet lid, the inertia torque can be suppressed to the minimum, and the toilet seat or the toilet lid can be securely attached to the first predetermined angle. Can be opened.

  According to the ninth aspect of the present invention, the first predetermined angle is added to the transmission means via the reduction gear train that is generated until the toilet seat or the toilet lid starts to open from the closed state to the opening direction side. By controlling the angle that is larger than the angle at which the torque is maximum as the first predetermined angle, the moment when the toilet seat or the toilet lid, which is the point at which the inertia torque becomes the largest, starts to open from the closed state is surely ensured. It is possible to operate with driving torque.

  According to a tenth aspect of the present invention, the second predetermined angle is applied to the transmission means while the driving torque is gradually increased from the first driving torque to the second driving torque. The first predetermined angle is defined as the second predetermined angle, which is the amount of change in driving torque that does not exceed the maximum torque applied to the transmission means generated within the first predetermined angle. Thereafter, the opening speed of the toilet seat or the toilet lid increases stepwise, so that there is no sudden speed fluctuation until the second predetermined angle, and the inertia torque can be suppressed.

  According to an eleventh aspect of the invention, the drive motor is configured to perform PWM control with a duty ratio, thereby controlling the first drive torque with a duty ratio smaller than 100%. When increasing the torque stepwise from the first drive torque to the second drive torque, the torque control of the drive motor can be performed by amplifying the duty ratio stepwise.

  As described above, according to the present invention, the predetermined time after the start of the operation when the toilet seat or the toilet lid is opened is controlled by outputting the drive motor that opens and closes the toilet seat or the toilet lid with a low driving torque. Reduce the load on the transmission means from the motor to the rotating shaft via the reduction gear train, and after a predetermined time has elapsed, increase the drive torque in stages to increase the opening speed of the toilet seat or toilet lid. It is possible to obtain a smooth opening feeling that is comfortable for the person.

  An electric opening / closing device for a toilet seat or toilet lid includes a rotating shaft that rotates together with the toilet seat or the toilet lid, a DC motor that rotates the rotating shaft in forward and reverse directions, and a drive circuit for driving the motor. Then, the driving force of the motor is transmitted to the rotating shaft through a reduction gear train to open and close the toilet seat or the toilet lid. The drive motor is a PWM control that controls the output by changing the duty ratio.

  Here, the electric opening operation of the toilet seat will be mainly described, but the same applies to the opening operation of the toilet lid.

  When the toilet seat is opened, PWM control is performed at a duty ratio that outputs the first driving torque until a first predetermined time after the opening operation is requested, as shown in FIG. The first predetermined time is longer than the time until the maximum torque is generated when the toilet seat opens in the opening direction, and the backlash of the transmission means from the drive motor to the rotating shaft, the fitting of the transmission shaft and the toilet seat The time is set in consideration of the backlash of the part and the speed variation of the drive motor itself. The first driving torque outputs the minimum driving torque that can open the toilet seat even when the toilet seat is heaviest, taking into account the weight variation when the toilet seat weight is changed and the toilet seat cover is attached. Ratio. After the first predetermined time elapses, the duty ratio is amplified stepwise over the second predetermined time until the second driving torque is reached. The second drive torque is set to a duty ratio of 100% at which the maximum output of the drive motor is exhibited, and the second predetermined time is set as long as the toilet seat opening feeling allows. By performing such PWM control, the angular acceleration when the toilet seat starts to be opened is suppressed to the minimum necessary, and the inertia torque generated at the moment when the toilet seat is opened is suppressed, so that the stress applied to the driving means such as the reduction gear train is reduced. After that, the toilet seat opening operation speed increases step by step, so that the user feels comfortable and a good opening operation feeling can be obtained.

  In the above embodiment, each of the time range controlled by the first drive torque and the time range controlled while amplifying the duty ratio in stages from the first drive torque to the second drive torque are The predetermined time is set as one predetermined time and the second predetermined time. However, when the electric opening / closing device has an angle detection means for detecting the opening / closing angle of the toilet seat or the toilet lid, as shown in FIG. This can be realized by controlling the duty ratio of the drive motor based on the detected opening angle of the toilet seat or toilet lid.

  In these embodiments, the first driving torque is set to a constant value. However, the first driving torque is not limited to this, and the first predetermined time elapses as the elapsed time or the opening angle increases, or the first driving torque increases. Until the predetermined angle is exceeded, the drive torque may be controlled to be slightly increased. Note that even if the driving torque is slightly increased, it will be referred to as the first driving torque in the present application.

  Further, during the second predetermined time or from the first predetermined angle to the second predetermined angle, the duty ratio is increased in steps to increase the driving torque, but the driving torque suddenly increases. You can also control it.

  The present invention is not limited to the PWM control of the drive motor, and the drive torque may be adjusted by controlling the applied voltage to the drive motor to be raised or lowered.

  Next, in order to clarify the characteristics of the present invention, (1) the case where the duty ratio is controlled at a constant 100% after a request for opening operation (comparative example), and (2) the first predetermined time is 180 msec, When the duty ratio for outputting the first drive torque is 60%, the second predetermined time is 300 msec, and the duty ratio for outputting the second drive torque is 100%, the torque applied to each transmission means is actually The measurement results will be described with reference to FIGS. 23 and 24 show the torque for only 500 msec from the opening operation request, and do not show the torque applied to the transmission means when the toilet seat is opened to the full opening angle.

  FIG. 23 shows the torque waveform and the drive duty ratio on the vertical axis for a comparative example in which the torque applied to the transmission means when the duty ratio of the drive is 100% immediately after the toilet seat opening operation request is taken, The elapsed time is taken on the horizontal axis. Between the point A after the toilet seat open request and the point A, the transmission means is not backed by the backlash of the transmission means from the drive motor to the rotating shaft or the backlash of the fitting part between the transmission shaft and the toilet seat. At the point A, the fitting part of the transmission shaft and the toilet seat collide and a load is applied. From point A to point B, the load torque due to the weight of the toilet seat, the torque generated by distortion of the transmission means such as the reduction gear train and the rotating shaft, and the total inertia torque generated at the moment when the stopped state starts moving are added to the transmission means. The toilet seat begins to open at point B (top of the mountain) where the maximum torque is reached. From point B to point C, the drive motor accelerates until the load torque of the toilet seat is balanced with the drive torque at a duty ratio of 100%. From point C onwards, the load torque according to the weight, center of gravity position, and opening angle of the toilet seat Enters a stable torque range applied to the drive motor.

  24, according to the present invention, the first predetermined time is 180 msec, the duty ratio for outputting the first driving torque is 60%, the second predetermined time is 300 msec, and the duty ratio for outputting the second driving torque is 100%. %, The torque waveform and the drive duty ratio when the torque applied to the transmission unit is measured are plotted on the vertical axis, and the elapsed time after the opening operation request is plotted on the horizontal axis. The first predetermined time is set to 180 msec, which is the maximum time when the variation of the backlash of the transmission means from the drive motor to the rotating shaft and the backlash of the fitting portion of the transmission shaft and the toilet seat is taken into consideration. The duty ratio for outputting the driving torque is set to 60% because the minimum duty ratio at which the toilet seat can be opened from the closed state even when the toilet seat weight varies and the maximum weight when the toilet seat cover is attached is set. In addition, the second predetermined time is set to 300 msec in order to make the opening operation speed of the toilet seat smooth without causing a sense of incongruity to the user when the duty ratio for outputting the second driving torque is 100%. The longest time is set. The waveform of the torque is the same as that of the comparative example described in FIG. 23, but the maximum torque (peak height) at point B is set by setting the duty ratio for outputting the first drive torque to 60%. It can be seen that there is a reduction of 0.7 N · m from 2.8 N · m to 2.1 N · m in the comparative example. This is the maximum effect in the present invention, and the maximum torque at point B is always generated when the toilet seat is electrically opened from the closed state. By reducing this maximum torque, the reduction gear train or the like is driven. The stress applied to the means can be reduced and the life can be extended. Further, since the duty ratio for outputting the first driving torque is set to 60%, the rotational speed of the driving motor becomes slower than when the duty ratio is set to 100%, and the output torque also decreases. As a result, points A, B, C Although there is a delay in the elapsed time after each point opening operation request and the time until the toilet seat is fully opened thereafter, the delay is about 200 to 300 msec, and the user does not feel uncomfortable.

Embodiments will be described below with reference to the drawings.
FIG. 1 is a perspective view of a toilet seat device 10 incorporating a toilet seat or toilet lid electric opening and closing device of the present invention, FIG. 2 is an exploded perspective view for explaining the mounting position of the toilet seat or toilet lid electric opening and closing device, and FIG. 4 is a cross-sectional view of the toilet seat apparatus 10 incorporating the toilet seat electric opening / closing device 30, and FIG. In the figure, the casing 11 of the heating toilet seat device 10 is fixed using the upper surface of the rim on the back side of the toilet body 1, and a convex storage portion 11a is formed at the front center of the casing 11, and the side wall 11b of the storage portion 11a is formed. The toilet seat electric opening / closing unit 30 and the toilet lid electric opening / closing unit 130 are attached, and the toilet seat 12 and the toilet lid 13 are attached to the electric opening / closing units 30, 130, respectively.

  The toilet seat 12 and the toilet lid 13 are provided with connecting portions 12a, 13a and rotating portions 12b, 13b at their respective base ends, and the connecting portion 12a is an electric opening / closing unit 30 for the toilet seat via an assist unit 80 described later. The connecting portion 13a is non-rotatably connected to the rotary shaft 50 connected to the output shaft 140 of the toilet lid electric opening / closing unit 130. The rotating parts 12b and 13b are provided with support shafts 50a (formed in the middle of the rotary shaft 50) and 81a (connected to the rotary shaft 40) for supporting the toilet seat 12 and the toilet lid 13 so that they can be opened and closed. Respectively connected to the tip 81a). Reference numeral 150 in FIG. 4 denotes a drive circuit for driving the electric opening / closing units 30 and 130 and a potting case for protecting the circuits.

Next, the structure of the electric opening / closing unit will be described with reference to FIGS.
5 is an exploded perspective view of the toilet seat electric opening / closing unit 30, FIG. 6 is an exploded perspective view of the drive motor assembly A, FIG. 7 is an exploded perspective view of the planetary gear assembly B, and FIG. 8 is a casing of the toilet seat electric opening / closing unit. FIG. 9 is an exploded perspective view of the assist unit 80. FIG. The number of teeth and the tooth shape of each gear in FIG. 8 are different from the actual ones (for example, the small gears 32b and 34b are actually 7 teeth, but are described as 8 teeth in the figure).

  As shown in FIG. 5, the toilet seat electric opening / closing unit 30 meshes with a casing 31 (comprising a main case 31a and a lid case 31b) that forms an outer shell, a drive motor assembly A, and a small gear 34b in the drive motor assembly. A third gear 38 having a large gear 37a and a second gear 37 having a small gear 37b for transmitting power to the next stage, a large gear 38a meshing with the small gear 37b, and a sun gear 38b for transmitting power to the next stage. , Planetary gear assembly B (as shown in FIG. 7, the planetary gear assembly B has a rotating shaft 40, a ring-shaped magnet 61 that is fixed to the rotating shaft 40 and detects the rotational position of the toilet seat 12, A tolerance ring 62 that functions as a torque limiter so as not to transmit a load to the carrier 63 when it hits the rotation shaft 40, and a key connected to the rotation shaft 40 via the tolerance ring 62. A planetary gear 64 that is rotatably attached to a planetary shaft 63a provided on the rear 63, a carrier 63, a bearing 65 that restricts the movement of the planetary gear 64 in the thrust direction, an internal gear 66 that meshes with the planetary gear 64, and a planet 31 on the casing 31a. It is comprised with the attachment spacer 67 for fixing a gear mechanism so that rotation is impossible.

  As shown in FIG. 6, the drive motor assembly A includes a drive motor 32 constituted by a DC motor such as a DC brush motor, a small gear 32 b press-fitted to an output shaft 32 a of the drive motor 32, and a drive motor 32. Of the first gear 34 and the first gear 34 having a first gear fixing spacer 33 fixed to the first gear 34 using a screw, a large gear 34a meshing with the small gear 32b, and a small gear 34b for transmitting power to the next stage. The rotary shaft 35 and the bearing 36 of the first gear 34 fixed to the spacer 33 are configured. A ring-shaped magnet 34c is integrated on the surface of the large gear 34a (drive motor side) by bonding or caulking.

The small gear 32b, the small gear 34b, and the small gear 37b are made of metal, the large gear 34a and the large gear 37a are made of resin, and the small gear 32b and the large gear 34a, and the small gear 34b and the large gear 37a are helical gears. . The large gear 38a and the sun gear 38b of the third gear 38 are integrally formed of metal, and the small gear 37b and the large gear 38a are spur gears. Further, the planetary gear 64 is made of metal, and the internal gear 66 is made of resin. The metal gear can be formed by metal sintering such as press sintering or injection sintering, cold forging, or the like. Moreover, as integral molding with a resin gear, it can shape | mold by insert molding etc.
Thus, by using a helical gear that can secure a contact area even if it is thinner than a flat tooth, even if the gear itself is thinned, the gear strength can be ensured and the reduction gear train can be made compact. Further, by using a helical gear with a large contact area for the first and second reduction gear trains that rotate at a relatively high speed, it is possible to reduce backlash and increase transmission efficiency. Further, by making the meshing of the helical gear portion metal (small gear) and resin (large gear), generation of heat due to wear, noise, and the like can be suppressed. Further, by making the third and fourth rows of reduction gears, which are relatively low speed and high torque, made of metal, the destruction of the gears can be suppressed.

Next, an assembly procedure of the toilet seat electric opening / closing unit 30 will be described with reference to the drawings.
As shown in FIG. 6, the assembly of the drive motor assembly A is performed according to the following procedure. First, one end of the shaft 35 is inserted into the bearing hole 33a of the spacer 33, the first gear 34 is inserted into the shaft 35, the other end of the shaft 35 is inserted into the shaft hole 36a of the bearing 36, and the positioning boss 33b is inserted into the positioning hole 36b. A self-tapping screw (not shown) is inserted and fixed in the fixing holes 36c and 36c and screwed into a lower hole 33c provided in the spacer 33, whereby the spacer 33, the first gear 34, the shaft 35 and the bearing 36 are integrated and further driven. The output shaft 32a and the small gear 32b of the motor 32 are inserted through the insertion hole 33e of the spacer 33 while paying attention to the meshing between the first gear 34 and the small gear 32b, and the screw insertion hole 36d (bearing 36) and the fixing hole 33d ( The assembly is completed by inserting a screw from the spacer 33) and screwing it into a screw hole 32 c provided in the drive motor 32. The screw insertion hole 36d has a diameter larger than that of the screw head, and the fixing hole 33d on the screw insertion hole 36d side has a diameter larger than that of the screw head until halfway (position where the thickness is the same as the other fixing hole 33d). By setting the diameter so that the screw portion penetrates from the middle, two screws for fixing to the drive motor 32 can be shared.
By integrating the first stage of the reduction gear train into the drive motor 32 in this manner, shaft blurring can be suppressed and transmission efficiency can be increased.

As shown in FIG. 7, the planetary gear assembly B is assembled in the following procedure.
First, the planetary gear 64 is mounted on the planetary shaft 63 a provided on the carrier 63, and the internal gear 66 is mounted while paying attention to the engagement with the planetary gear 64. Next, the end portion of the shaft 63 a is mounted in the bearing recess 65 a provided in the bearing 65, and the small diameter cylindrical portion 63 c of the fastening spacer 63 b provided in the carrier 63 is provided in the bearing 65 in order to secure the operation region of the planetary gear 64. The carrier 63, the planetary gear 64, the bearing 65, and the internal gear 66 are integrated by being inserted into the through hole 65b and crimped (hereinafter, this integrated unit is referred to as a “planetary gear mechanism”). A tolerance ring 62 is fitted on the outer periphery of the output shaft 63d of the planetary gear mechanism, and a convex portion 67e having substantially the same shape as a plurality of concave grooves 66a for preventing rotation formed at a predetermined interval on the outer periphery of the internal gear 66. A spacer 67 (see FIG. 8) is mounted on the internal gear 66, and the tolerance ring is inserted into the connecting hole 40a provided at the rear end of the rotating shaft 40 in a state where the output shaft 63d protrudes from the opening 67b of the spacer 67. By assembling the outer periphery of 62, the assembly of the planetary gear assembly B is completed. In addition, a ring-shaped magnet 61 (having two NS) formed in advance on the flange 40b of the rotary shaft 40 is integrated using a retaining ring or the like. A protective block 67c that protects an area detection circuit 71, which will be described later, is integrally provided on the back side of the spacer 67, and a wiring processing rib 67d is provided on the surface of the 67c.

Next, an assembly procedure of the toilet seat electric opening / closing unit 30 will be described with reference to FIG.
A self-tapping screw (not shown) is inserted into the mounting hole 70b of the rotation detection circuit 70 on which the Hall IC 70a for detecting the magnetic force of the magnet 34c is mounted, and fixed to the lower hole 31e of the mounting boss provided in the casing 31a. 31a and the rotation detection circuit 70 are integrated. Next, a self-tapping screw (not shown) is inserted into the mounting hole 71c of the area detection circuit 71 on which the Hall ICs 71a and 71b for detecting the magnetic force of the magnet 61 are mounted, and the screw is inserted into the lower hole 31f of the mounting boss provided in the casing 31a. The casing 31a and the area detection circuit 71 are integrated by fixing. The area detection circuit 71 is soldered with an energization wiring (not shown) to the drive motor 32, and a positive temperature coefficient thermistor 71d connected in series with one of the energization wirings is further soldered. . This positive characteristic thermistor is provided to prevent an overcurrent from flowing to the drive motor 32. Next, the drive motor assembly A is stored in the motor storage portion 31c provided at the lower end of the casing 31a, and a self-tapping screw (not shown) is inserted into the mounting hole 33f formed in the spacer 33 to provide the casing 31a. The casing 31a and the drive motor assembly A are integrated by screwing in the lower hole 31d of the mounting boss.

  Next, the projection 31r (see FIG. 8) provided on the cylindrical portion 31g of the planetary gear assembly B with the planetary gear assembly B is aligned with the concave groove 67a provided on the outer periphery of the spacer 67, and the protective block 67c of the spacer 67 is provided. Is inserted and fixed in the cylindrical portion 31g so that the outer shape of the casing and the inner wall of the casing 31a come into contact with each other. A through hole 31i is provided in the inner wall of the cylindrical portion 31g, and water intrusion from the through hole 31i is caused by the peripheral wall 31j of the through hole 31i and the O-ring 40c accommodated in the O-ring groove 40 provided in the rotating shaft 40. It is configured to prevent. Here, the reason why the casing 31a is attached using the spacer 67 is that the planetary gear mechanism itself needs to have roundness in terms of its function, and in order to attach this directly to the casing 31a, the roundness of the cylindrical portion 31g of the casing 31a is also required. Since the dimensional tolerance is severe and the yield is deteriorated, the cylindrical portion 31g of the casing 31a has a structure in which the manufacturing tolerance can be absorbed by the elastic deformation of the spacer 67 as a substantially point contact with the convex portion 67e of the spacer 67 and the convex line 31r of the casing 31a. It is for making manufacture of this easy.

Next, paying attention to the meshing between the planetary gear 64 and the sun gear 38b, the third gear 38 is inserted into the planetary gear mechanism, and the meshing between the small gear 37b and the large gear 38a and the meshing between the large gear 37a and the small gear 34b are performed. Carefully insert and fix the second gear on the shaft 31k. Finally, the shaft 31l provided in the casing 31b is inserted into the shaft hole 38c of the third gear 38, the tip of the shaft 31k is inserted into the bearing 31m, and a self-tapping screw is inserted into the mounting hole 31n provided in the casing 31a. Then, the toilet seat electric opening / closing unit 30 is assembled by screwing into the lower hole 31p of the mounting boss provided in the casing 31b.
As shown in FIG. 8, two circles (Ca, Cb) formed by projection surfaces of the outer shape of the drive motor 32 and the outer shape of the planetary gear mechanism are arranged adjacent to each other, and further, two circles (Ca, Cb) and two circles are arranged. By arranging the shafts of the first gear 34 and the second gear 37 in the projection plane surrounded by the outer tangent lines (Lc, Ld), the electric opening / closing unit 30 can be designed compactly. Furthermore, in the present embodiment, the axes of the first gear 34 and the second gear 37 are within the projection plane surrounded by the horizontal lines (La, Lb) passing through the center of the two circles (Ca, Cb) and the circumscribed lines (Lc, Ld). Can be designed to be more compact. Instead of the horizontal lines (La, Lb), a perpendicular line passing through the center of each circle may be used with respect to a line connecting the centers of the two circles (Ca, Cb). In the present embodiment, this perpendicular line is also substantially horizontal, so it is not so different, but such a design is desirable when the reduction gear train is arranged in the horizontal direction.

  The toilet lid electric opening / closing unit 130 also has the same component configuration and assembly procedure as the toilet seat electric opening / closing unit 30, and therefore the description thereof is omitted except for the differences. The differences will be described below. The toilet seat electric opening / closing unit 30 and the toilet lid electric opening / closing unit 130 have a symmetrical configuration. As shown in FIGS. 2, 4, and 8, the output shaft 140 of the toilet lid electric opening / closing unit 130 is provided with a substantially rectangular connecting hole 141 into which the rotating shaft 50 is inserted and fixed in a non-rotatable manner. The casing 131a of the toilet lid electric opening / closing unit 130 is integrally provided with a boss 131b for keeping a predetermined distance from the side wall 11b of the casing 11 and a receiving projection 131c of the cap member 11d.

Next, the assist unit 80 will be described with reference to FIGS.
The assist unit 80 includes a connecting shaft 81 that is non-rotatably connected to the rotating shaft 40 of the electric opening / closing unit 30, an assist spring 82 having one end 82 a fixed to the connecting shaft 81 in order to bias the toilet seat 12 in the opening direction, and an assist A connecting cover 83 fixed to the other end 82 b of the spring 82 and non-rotatably connected to the casing 11, a lid cover 84 surrounding the assist spring 82 together with the connecting cover 83, and an attaching / detaching lever for attaching / detaching the toilet seat 12 from the casing 11. 85, and a fixing member 86 for fixing the assist unit 80 to the toilet seat 12.

  A serration is formed at the distal end portion 81a of the connecting shaft 81 (support shaft of the toilet lid 13), and a large-diameter portion 81b for restricting the movement of the connecting shaft 81 in the thrust direction is formed at a substantially central portion. In addition, an O-ring groove 81c for sealing between the inner cylinder portion 84a of the lid cover 84 is formed, and an insertion for inserting one end into the assist spring 82 between the large-diameter portion 81b and the O-ring groove 81c. A hole 81d is formed. Further, an O-ring groove 81e for sealing between the inner cylinder portion 83a of the cover 83 is formed, and a groove 81f having substantially the same shape as the outer shape of the rotary shaft 40 is formed at the end portion.

One end 82a of the assist spring 82 is bent toward the center and inserted into the insertion hole 81d, and the other end 82b is bent toward the center and fixed to a support groove 83b formed on the outer periphery of the inner cylinder portion 83a of the connection cover 83. The The base portion of the support groove 83b forms a prevention wall 83d that slightly increases the thickness of the bottom 83c and prevents the other end 82b of the assist spring 82 from rotating. In addition, a restriction protrusion 83e that is engaged with an engagement protrusion 31q formed integrally with the outer casing 31a of the toilet seat electric opening / closing unit 30 to restrict the rotation is formed at the rear end of the connection cover 83. A stopper 83f that restricts the rotation of the detachable lever is formed at one place on the peripheral edge of 83e. Further, a thin diameter portion 83h having a slightly narrowed diameter is formed in the outer cylinder portion 83g.
A welding rib 83i is formed on the entire periphery of the opening end of the connection cover 83, and the lid cover 84 is integrated by ultrasonic welding or the like.

The detachable lever 85 is formed of a support cylinder 85a with the upper part cut out and a detachable cylinder 85b with the lower part cut out, and a ring-shaped rib 85c with a slightly increased thickness on the inside and outside is formed therebetween. The inner diameter of the ring-shaped rib 85c is set to be substantially the same as the small diameter portion 83h and smaller than the outer cylindrical portion 83g. In addition, a gripping projection 85d is formed on the detachable cylinder 85b.
The fixing member 86 has a connection opening 86a having substantially the same shape as the outer shape of the connection shaft 81, protrusions 86b provided at predetermined intervals along the outer periphery in order to be non-rotatably fixed to the toilet seat 12, and a substantially L-shaped connection. A crank 86c is formed. Further, the connecting crank 86c is formed with a lower hole 86d for fastening screws and a stopper 86e for restricting the movement of the assist unit 80 (excluding the fixing member 86) in the thrust direction.

  Next, the assembly procedure of the assist unit 80 will be described. O-rings are collected in the O-ring grooves 81 c and 81 e of the connecting shaft 81, one end 82 a of the assist spring 82 is inserted into the insertion hole 81 d of the connecting shaft 81, and the other end 82 b is engaged with the support groove 83 b of the connecting cover 83. Thus, the connecting shaft 81 is inserted into the inner cylindrical portion 83a of the connecting cover 83 until the end of the inner cylindrical portion 83a and the large diameter portion 81b of the connecting shaft 81 come into contact with each other. Thereby, the other end 82b of the assist spring 82 is accommodated in the prevention wall 83d. Next, the distal end portion 81a of the connecting shaft 81 is inserted into the inner cylindrical portion 84a of the cover cover 84, and the cover cover is moved with the back side of the cover cover 84 and the welding rib 83i of the connection cover 83 in contact with each other. The connecting shaft 81, the assist spring 82, the connecting cover 83, and the lid cover 84 are integrated by sonic vibration. Next, the detachable lever 85 is inserted into the outer cylindrical portion 83g. Since the outer cylindrical portion 83g has a slightly larger diameter than the ring-shaped rib 85c, the ring-shaped rib 85c rides on the outer cylindrical portion 83g and is inserted into the small-diameter portion 83h. Then, the connecting cover 83 and the attachment / detachment lever 85 are integrated, and the attachment / detachment lever 85 is restricted from coming off in the thrust direction by the outer tube portion 83g and the ring-shaped rib 85c. Next, the assist unit 80 is integrated by inserting the connecting shaft 81 into the connecting opening 86 a of the fixing member 86.

  The connecting shaft 81 of the assist unit 80 is inserted into the connecting hole 12d (see FIG. 1) of the toilet seat 12, and the assist unit 80 is inserted into the connecting portion 12a of the toilet seat 12, and the lower hole 86d of the fixing member 86 and The toilet seat 12 and the assist unit 80 are integrated by fastening the screw hole 12c (see FIG. 1) of the toilet seat 12 with a self-tapping screw. Since the connecting crank 86c can be elastically deformed outward before being attached to the toilet seat 12, the assist unit 80 (excluding the fixing member 86) can be detached from the fixing member 86, but is attached to the toilet seat 12. Later, since the outer deformation is restricted by the toilet seat 12, the assist unit 80 (excluding the fixing member 86) is restricted from coming off in the thrust direction by the stopper 86e and the flange 83j of the connecting cover 83. Similarly, the attachment / detachment lever 85 has a small clearance between the connecting crank 86c and the outer cylinder portion 83g, and the attachment / detachment lever 85 cannot be deformed outwardly so as to get over the outer cylinder portion 83g.

Next, the tolerance ring 62 will be described with reference to the principle diagram of FIG. As shown in the drawing, the tolerance ring 62 has a ring shape having a wave-shaped portion, and each wave acts as a spring, and its acting force is proportional to the amount of deformation of the wave. Force required for assembly is AF, radial force is RL (N), friction coefficient is μ, number of waves is n, wave deformation is c (mm), spring constant is K (N / mm), transmission torque Is Mt and the shaft diameter is d (m).
RL = n · c · K
AF = RL · μ
Mt = AF · d / 2
Can be calculated.
The spring constant can be set by changing the thickness, wave pitch, width, shape, and height of the material. Therefore, it is determined by experiment etc. how much torque is applied to the rotating shafts 40 and 140 at normal times. The shape of the tolerance ring 62 is selected according to the torque.
When torque more than this set torque is generated on the rotating shaft 40, the corrugated portion 62a of the tolerance ring 62 bites into the connecting hole of the rotating shafts 40, 140 and is fixed, and the ring-shaped edge 62b of the tolerance ring is The outer periphery of the output shaft 63d of the carrier 63 is slid, and the excess of the set torque or more is not applied to the inside of the electric opening / closing units 30, 130, so that the gears can be prevented from being damaged.

  A sectional view of the drive motor 32 is shown in FIG. As shown in the figure, the shaft of the drive motor 32 penetrates the inside of the motor, the diameter thereof is relatively thick inside, and the exposed portion has a small diameter. The reason why the tip 32a has a small diameter is to reduce the number of teeth of the small gear 32b as much as possible and to increase the reduction ratio. Although it is conceivable that the shaft itself has a small diameter, if the shaft is thin relative to the shaft length, the shaft runout of the drive motor 32 increases, so the shaft itself is not made small and the small gear 32b is attached. Only the portion to be cut is made a small diameter.

Next, the operation of the toilet seat electric opening / closing unit 30 having the above-described configuration will be described.
FIG. 12 is a control block diagram of the toilet seat device of the present invention, FIG. 13 is a driver circuit diagram of the drive motor 32, FIG. 14 is a waveform of energization signals to the switching elements Tr1, Tr2, Tr3, Tr4, FIG. Output signal waveforms of the provided Hall ICs 71a and 71b, FIG. 16 shows an output signal waveform of the Hall IC 70a provided in the rotation detection circuit, and FIGS.

As shown in FIG. 12, the drive motor 32 is controlled by the driver circuit 150.
Referring to FIG. 13, driver circuit 150 prevents switching elements Tr1, Tr2, Tr3, Tr4 configured by transistors or the like to control the rotation direction and rotation amount, and the overcurrent from flowing to drive motor 32. And a diode d1, d2 as protective means for preventing a back electromotive force or the like at the time of brake control from being applied to a positive characteristic thermistor 71d and an electric switching control CPU or the like. In the structure of the electric opening / closing motor this time, when it is turned from the output side (= toilet seat / toilet lid), a DC motor is used in multiple stages (544 stages), so the generated voltage of the motor increases (rises to about 70V). .
When the drive motor 32 is rotated forward, Tr1 and Tr4 are turned on, Tr2 and Tr3 are turned off, Tr1 and Tr4 are turned off, and Tr2 and Tr3 are turned on when reversing. Tr3 and Tr4 are turned on, and Tr1 and Tr2 are turned off (short brake). Further, when releasing the load, all of Tr1, Tr2, Tr3, and Tr4 are turned off (free control). When the brake is applied, the shaft of the drive motor 32 is rotated by the weight of the toilet seat or the toilet lid, and the drive motor 32 acts as a generator. Therefore, a back electromotive force is applied to the electric switching control CPU or the like by the diodes d1 and d2. Do not. Although not shown, another diode is provided so that no counter electromotive force is applied to Tr3 and Tr4.

  Further, the rotational speed of the drive motor 32 is controlled by duty-controlling each on-time with an energization signal waveform as shown in FIG. Note that G is 1 ms (PWM driving frequency 1 kHz) during forward rotation and reverse rotation, and G is 8 ms (PWM driving frequency 125 Hz) during braking. Note that ON-Duty H% indicates that the time for which the ON-Duty is turned on in one cycle (Gms) is H%. For example, if G = 1 ms and H = 30%, 0.3 ms in one cycle. (1ms * 30%) means turning on. This H is set according to the detection position of the toilet seat or the toilet lid detected by the rotation detection circuit 70 and the area detection circuit 71. (Hereinafter described as 30% Duty etc.) Further, the open position of the toilet seat / toilet lid, as shown in FIG. 15, area A (closed area), area B (operation area), area C (open end area), It is divided into four areas of area D (abnormal area).

  FIG. 17 shows a flowchart when there is a toilet lid opening request. For example, if a toilet lid opening switch (not shown) provided on a remote control or the like is operated by a human body detection sensor or a toilet lid opening request is made and a toilet lid opening request is made, it is confirmed whether the lid opening end position is memorized, and the lid opening end position Is stored, the Tr1 and Tr4 are turned on at a low duty (60% duty, G = 1 ms) so that the driving motor operates at the first driving torque until the toilet lid is surely lifted. The opening operation is continued at a low duty for a first predetermined time (here, 180 msec), and a second driving torque is output from 60% duty for a second predetermined time (here, 300 msec) (100% duty here). ) Is gradually increased until reaching 100% duty, and after reaching 100% duty, the 100% duty is continued, When the output of C71a switches from Low to Hi (80 ° detection), Tr1 and Tr4 are intermittently turned on at 50% Duty (G = 1 ms), and further, 80 ° is detected by the area detection circuit 71. When the output pulse of the Hall IC 70a of the rotation detection circuit 70 reaches a predetermined number (number of pulses corresponding to the lid open end position−number of pulses corresponding to 15 °), Tr1 and Tr4 are intermittently set at 40% Duty (G = 1 ms). The output pulse of the Hall IC 70a of the rotation detection circuit 70 after the area detection circuit 71 detects 80 ° in the ON state is further set to a predetermined number (number of pulses corresponding to the lid open end position−number of pulses corresponding to 10 °). When Tr3 and Tr4 reach 100% Duty (G = 8ms) for 0.1 seconds, Tr3 and Tr4 will turn on at 50% Duty (G = 8ms) for 0.4 seconds After that, the Tr1 and Tr4 are turned on again intermittently at 20% Duty (G = 1 ms) and the drive motor 32 is driven to change the output pulse of the Hall IC 70a of the rotation detection circuit 70 for 0.5 second. When there is no more, it is determined that the opening operation of the toilet lid 13 has been stopped by an obstacle such as a low tank (stop detection), and energization to the drive motor 32 is stopped. Even when the stop detection cannot be obtained, the energization is stopped when the number of pulses corresponding to 8 ° can be obtained from the Hall IC 70a. When the drive motor 32 in the toilet lid electric opening / closing unit 130 is energized in this way, a reduction gear train (small gear 32b, first gear 34, second gear 37, third gear 38, planetary gear, Mechanism), the tolerance ring 62, and the output shaft 140 transmit the rotation of the drive motor 32 to the rotary shaft 50 to open the toilet lid 13 and generate back electromotive force due to its own weight near the open end exceeding 80 °. By applying the brakes, it is possible to reduce the collision sound with obstacles such as low tanks. Finally, the toilet lid is driven again with 20% duty to prepare for the next closing operation.

  FIG. 18 shows a flowchart when there is a toilet seat opening request. For example, when a toilet seat opening switch (not shown) provided in a remote controller or the like is operated to request toilet seat opening, it is confirmed whether the seat opening end position is stored, and if the seat opening end position is stored, the drive motor Is turned on at a low duty (60% duty, G = 1 ms in this case) so that Tr1 and Tr4 operate at the first driving torque, and a first predetermined time (here 180 msec) until the toilet lid is lifted reliably. The opening operation is continued at a low duty, and the duty is gradually increased until a duty (100% duty here) is output from the 60% duty to the second driving torque in the second predetermined time (here 300 msec). After amplifying and reaching 100% duty, 100% duty is continued, and the output of Hall IC 71a of area detection circuit 71 switches from Low to Hi. (80 ° detection), Tr1 and Tr4 are intermittently turned on at 50% Duty (G = 1 ms), and after the 80 ° detection by the area detection circuit 71, the Hall IC 70a of the rotation detection circuit 70 When the output pulse reaches a predetermined number (number of pulses corresponding to the lid open end position−number of pulses corresponding to 15 °), Tr1 and Tr4 are intermittently turned on at 40% Duty (G = 1 ms), and an area detection circuit When the output pulse of Hall IC 70a of rotation detection circuit 70 after detecting 80 ° at 71 reaches a predetermined number (number of pulses corresponding to lid open end position−number of pulses corresponding to 10 °), Tr1 and Tr4 are set to 20%. When the drive motor 32 is driven intermittently with a duty (G = 1 ms) and the output pulse of the Hall IC 70a of the rotation detection circuit 70 has not changed for more than 0.5 seconds, the low tank Seat 12 opening operation is stopped by an obstacle is determined that (stop detection) stops power supply to the drive motor 32. If the stoppage cannot be detected even after 35 ° driving (counting the number of pulses corresponding to 35 ° of the rotation detection circuit 70) after shifting to the area D, the energization is stopped at that time. When this stop position is 140 ° or more, it is regarded as abnormal, and the process proceeds to an abnormal control flow described later. When the drive motor 32 in the toilet seat electric opening / closing unit 30 is energized in this way, the reduction gear train (small gear 32b, first gear 34, second gear 37, third gear 38, planetary gear mechanism). ), The rotation of the drive motor 32 is transmitted through the tolerance ring 62 and the output shaft 40, and the toilet seat 12 is opened. Note that when the toilet lid 13 is opened, brake control is performed to perform a gentle closing operation, but this is not performed in the toilet seat 12. This is because a cushion leg is provided on the back surface of the toilet lid 13, and even if the toilet seat 12 is opened with force, a collision sound is originally suppressed by the cushion leg.

  For example, when a toilet lid / toilet seat simultaneous opening switch (not shown) provided on a remote controller or the like is operated to make a toilet lid / toilet seat opening request, as shown in the flowcharts of FIGS. The toilet seat 12 and the toilet lid 13 are opened by simultaneously controlling the drive motors 32 of the toilet seat opening / closing unit 30.

  FIG. 19 shows a schematic flowchart for storing the toilet lid (toilet seat) open end position. For example, when a toilet lid (toilet seat) opening switch (not shown) provided on a remote control or the like is operated to open a toilet lid (toilet seat) request, it is confirmed whether the toilet lid (toilet seat) open end position is memorized. (Toilet seat) If the position of the open end is not stored, Tr1 and Tr4 are turned on at a low duty (60% Duty, G = 1 ms) so that the drive motor operates at the first drive torque. The opening operation is continued at a low duty for a first predetermined time (180 msec in this case) until it is reliably lifted, and the second driving torque is output from 60% Duty at a second predetermined time (300 msec here). The duty is amplified in stages until reaching (here, 100% duty), and after reaching 100% duty, 100% duty is continued, and the hole I of the area detection circuit 71 is reached. When the output of 71a switches from Low to Hi (80 ° detection), Tr1 and Tr4 are intermittently turned on at 50% Duty (G = 1 ms), and the change in the output pulse of Hall IC 70a of rotation detection circuit 70 is 0. When there is no more than 5 seconds, it is determined that the toilet lid (toilet seat) opening operation has been stopped (stop detection) by an obstacle such as a low tank, and energization to the drive motor 32 is stopped. In addition, the number of output pulses of the rotation detection circuit 70 after shifting to the area C is counted, and the count value is stored as a toilet lid (toilet seat) open end position. If stop detection is not obtained, the toilet lid drive is stopped at the time of 8 ° drive as shown in FIG. Similarly, when the toilet seat cannot be detected to stop, when the drive motor 32 in the toilet seat electric opening / closing unit 30 is energized so as to be driven to a position of 140 ° as shown in FIG. The rotation of the drive motor 32 is transmitted through the reduction gear train (the small gear 32b, the first gear 34, the second gear 37, the third gear 38, the planetary gear mechanism), the tolerance ring 62, and the output shaft 40. Open. Note that when the toilet lid 13 is opened, brake control is performed to perform a gentle closing operation, but this is not performed in the toilet seat 12. This is because a cushion leg is provided on the back surface of the toilet lid 13, and even if the toilet seat 12 is opened with force, a collision sound is originally suppressed by the cushion leg.

  FIG. 20 shows a control flow at the time of abnormality. Normally, the toilet seat 12 is in contact with the casing 11 and therefore does not rotate more than 110 °. However, if the toilet seat opening switch or the toilet seat / toilet lid simultaneous opening switch is operated with the toilet seat 12 and the toilet lid 13 removed, the casing 11 does not come into contact with the casing 11, and therefore the control angle rotates to 140 °. (See FIG. 18). Even if the toilet seat 12 and the toilet lid 13 are to be attached in such a state, the rotating shafts 40 and 50 of the electric opening / closing unit and the connecting portions 12a and 13a and the rotating portions 12b and 13b provided at the base end portion of the toilet seat and toilet lid, Does not attach because it does not mesh. For this reason, when the position of the rotary shaft 40 of the toilet seat electric opening / closing unit 30 is detected to be 140 ° or more, it is considered that the seat cover is removed and the output shaft is moved to around 90 ° to move the toilet seat 12 Allow installation. When 140 ° or more is detected on the toilet seat side, the toilet lid side electric opening / closing unit 130 similarly moves the rotary shaft 50 to the vicinity of 90 ° so that the toilet lid 13 can be attached. Since the area in which the toilet lid 13 is located varies from time to time, the toilet lid can be reliably opened and closed in the vicinity of 90 ° by moving to one end area D and controlling from there. The rotating shaft 50 of the unit 130 can be moved.

By the way, since the toilet seat 12 is provided with a heater for heating and is relatively heavy, the toilet seat 12 cannot be lifted only by the toilet seat electric opening / closing unit 30 having the same structure as the toilet lid electric opening / closing unit 130. For this purpose, an assist unit 80 as shown in FIG. 3 is provided. The assist unit 80 includes an assist spring 82 having one end integrated with the casing 11 and the other end integrated with the toilet seat 12. The assist spring 82 has a natural length when the toilet seat 12 is substantially vertical, and is twisted when the toilet seat 12 is closed.
Therefore, when the toilet seat 12 is closed, a torque on the opening side can be generated, so that the toilet seat 12 can be lifted even with substantially the same structure as the toilet lid electric opening / closing unit 130.

  One end 82a of the assist spring 82 is integrated with the casing 11 by engagement of the restricting projection 83e of the connecting case 83 and the engaging projection 31q of the toilet seat electric opening / closing unit 30 attached to the casing 11, and the assist spring 82 is integrated. The other end 82 b is integrated with the toilet seat 12 via a connecting shaft 81 and a fixing member 86.

The perspective view of the toilet seat apparatus 10 incorporating the electric opening / closing apparatus of the toilet seat or toilet lid of this invention The exploded perspective view for demonstrating the attachment position of the electric switchgear of the toilet seat or toilet lid of this invention Sectional drawing of the toilet seat apparatus 10 incorporating the toilet seat electric switchgear 30 Cross section of toilet seat device 10 incorporating a toilet lid electric opening / closing device 130 Disassembled perspective view of toilet seat electric opening / closing unit 30 Exploded perspective view of drive motor assembly A Exploded perspective view of planetary gear assembly B The top view in the state which removed the casing 31b of the electric opening / closing unit for toilet seats An exploded perspective view of the assist unit 80 Principle diagram of tolerance ring 62 Cross section of drive motor 32 Control block diagram of toilet seat device of the present invention Driver circuit diagram of drive motor 32 Waveform of energizing signal to switching elements Tr1, Tr2, Tr3, Tr4 Output signal waveforms of Hall ICs 71a and 71b provided in the area detection circuit 71 Output signal waveform of Hall IC 70a provided in the rotation detection circuit Flow chart when there is a toilet lid opening request Flow chart when there is a toilet seat opening request Flowchart for storing toilet lid (toilet seat) open end position Flowchart of abnormal control when the output shaft of the electric opening / closing unit moves in the opening direction with the toilet seat and toilet lid removed The figure which shows the relationship between the drive duty for controlling the drive torque at the time of opening operation of a toilet seat and a toilet lid, and the time from an opening request | requirement The figure which shows the relationship between the drive duty for controlling the drive torque at the time of opening operation of a toilet seat and a toilet lid, and the angle of the toilet seat or toilet lid from an opening request | requirement The figure which shows the load torque concerning the transmission part in the comparative example which controlled the drive duty at the time of opening operation of a toilet seat by 100% constant The figure which shows the load torque concerning a transmission part when driving duty at the time of opening operation of a toilet seat is controlled by 60% for 180 msec and it is amplified in steps over 300 msec to driving duty 100% regarding this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Toilet seat apparatus 11 ... Casing 12 ... Toilet seat 13 ... Toilet lid 30 ... Toilet seat electric switchgear 31 ... Electric switch casing 32 ... Drive motor 33 ... Spacer 34 ... First gear 35 ... First gear shaft 36 ... First gear Bearing 37 ... Second gear 38 ... Third gear 40 ... Rotating shaft for toilet seat 50 ... Rotating shaft for toilet lid A ... Drive motor assembly B ... Planetary gear assembly

Claims (11)

A rotating shaft that rotates together with the toilet seat or the toilet lid, a direct current motor that rotates the rotating shaft in the forward and reverse directions, and a drive circuit that drives the motor, and the driving force of the motor is reduced by a reduction gear train. In the toilet seat or toilet lid electric opening and closing device that opens and closes the toilet seat or toilet lid by transmitting to the rotating shaft through the door, when driving the toilet seat or toilet lid in the opening direction, until the first predetermined time after the opening operation starts An electric opening and closing device for a toilet seat or toilet lid, wherein the drive motor is controlled to operate with a first drive torque lower than a maximum drive torque of the drive motor. The control is performed to increase the drive torque stepwise from the first drive torque after the first predetermined time has elapsed and to reach the second drive torque in the second predetermined time. An electric opening / closing device for the toilet seat or toilet lid. The toilet seat or toilet lid electric opening and closing device according to claim 1, wherein the toilet seat or toilet lid is controlled to output as the first driving torque a driving torque that can be moved from the closed state to the opening direction side. . Control is performed by setting the first predetermined time as a time longer than the time when the torque applied to the transmission means via the reduction gear train generated until the toilet seat or toilet lid starts to open in the opening direction side from the closed state. The electric opening and closing device for a toilet seat or toilet lid according to claim 1, which is performed. While the drive torque increases stepwise from the first drive torque to the second drive torque, the torque applied to the transmission means is the maximum torque applied to the transmission means generated within the first predetermined time. The electric opening and closing device for a toilet seat or a toilet lid according to claim 2, wherein the second predetermined time is a time that does not exceed the driving torque change amount. A rotating shaft that rotates together with the toilet seat or the toilet lid, a DC motor that rotates the rotating shafts in forward and reverse directions, a drive circuit for driving the motor, and an opening / closing angle of the toilet seat or toilet lid are detected. In a toilet seat or toilet lid electric opening and closing device that opens and closes the toilet seat or toilet lid by transmitting the driving force of the motor to the rotating shaft through a reduction gear train and opening and closing the toilet seat or toilet lid in the opening direction. When driving, a toilet seat or stool is controlled so that the drive motor operates at a first drive torque lower than the maximum drive torque of the drive motor up to a first predetermined angle after the opening operation is started. Electric opening and closing device for the lid. 7. After the first predetermined angle is reached, control is performed to increase the drive torque stepwise from the first drive torque and reach the second drive torque at the second predetermined angle. An electric opening / closing device for the toilet seat or toilet lid. The toilet seat or toilet lid electric opening and closing device according to claim 6, wherein the toilet seat or toilet lid is controlled to output as a first driving torque a driving torque that allows the toilet seat or the toilet lid to open from the closed state to the opening direction side. Control is performed with the first predetermined angle being an angle larger than the angle at which the torque applied to the transmission means via the reduction gear train generated until the toilet seat or toilet lid starts to open in the opening direction from the closed state. The electric opening and closing device for a toilet seat or toilet lid according to claim 6. While the drive torque increases stepwise from the first drive torque to the second drive torque, the torque applied to the transmission means is the maximum torque applied to the transmission means generated within the first predetermined angle. The electric opening and closing device for a toilet seat or toilet lid according to claim 7, wherein an angle that is a drive torque change amount not exceeding the second predetermined angle is the second predetermined angle. The electric opening / closing device for a toilet seat or toilet lid according to any one of claims 1 to 10, wherein the drive motor is configured to perform PWM control with a duty ratio.

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