Device for generating pulsation for a washbasin toilet seat

Abstract

Device for generating pulsation for a washbasin seat (10) with which the flushing water spraying towards the human genitals is pulsated, the device comprising the following elements: an electric motor (30); a linear motion element (39) that is linearly movable such that the volume of a pump chamber (24a) arranged on a flow channel of the rinse water is changed depending on the rotation of the electric motor (30); and a stroke quantity setting means (40) with which the stroke quantity of the linear motion part (39) can be adjusted, wherein the stroke quantity setting means (40) is a control means (40) with which the electric motor (30) can be controlled so that it is driven alternately in the forward direction and in the opposite direction within a certain angular range which includes less than 180 degrees, the electric motor (30) is a DC motor (30) with permanent magnets, and the DC motor (30) can be controlled by the control means (40) such that it rotates in the forward direction when the current is switched on and in the opposite direction when the current is switched off due to a cogging torque.

Description

[Commercial application area]

[0001] The invention relates to a device for generating pulsation for a washbasin toilet seat. [State of the art]

[0002] A device of this type for generating pulsation in a washbasin seat is known to date (see, for example, the devices according to publications JP 2015 - 227 601 A and JP 2010 - 7 341 A). This device comprises an electric motor with an eccentric cam mounted on its axis of rotation and a transmission element that is linearly moved by the rotation of the eccentric cam and transmits this movement to a displacement element. The device also alternately draws in and expels flushing water from a liquid chamber by changing the volume of the liquid chamber due to the displacement of the displacement element, thus generating pulsation. In such a device, the user's flushing needs are typically met by adjusting the pulsation through control of the electric motor's rotational speed.

[0003] The publication JP 2003 - 328 420 A discloses a device for generating pulsation for a washbasin seat with which the flushing water spraying towards the human genitals is pulsated, wherein the device comprises the following elements: an electric motor; a linear motion part which is moved or movable linearly such that the volume of a pump chamber arranged on a flow channel of the flushing water is changed depending on the rotation of the electric motor; and a stroke quantity adjustment means with which the stroke quantity of the linear motion part can be adjusted. [Overview of the invention][Problem to be solved by the invention]

[0004] With such a device for generating pulsation, it is desirable to set the pulsation range as broadly as possible to meet the diverse needs of the user regarding the sensation during rinsing. However, in the aforementioned device for generating pulsation, the displacement element is shifted by the stroke of the linear movement of the transmission element, and the magnitude of the change in the fluid chamber volume remains constant, even if, for example, the rotational speed of the electric motor is reduced. This is intended to minimize the pulsation, thus limiting the reduction in pulsation intensity. Therefore, there is room for further improvement to meet the diverse needs of users during rinsing.

[0005] The main objective of the device for generating pulsation for a washbasin seat according to the present invention is to better meet the wide range of needs during flushing. [Means of solving the problem]

[0006] To achieve the main objective above, the following measures are used in the device for generating pulsation for a washbasin seat according to the present invention.

[0007] The core of the device for generating pulsation for a washbasin seat according to the present invention is a device for generating pulsation for a washbasin seat, with which the flushing water spraying towards the human genitals is pulsated, wherein the device comprises the following elements: an electric motor; a linear motion component that is moved or movable linearly such that the volume of a pump chamber arranged in a flow channel of the flushing water is changed depending on the rotation of the electric motor; and a stroke quantity setting device with which the stroke quantity of the linear motion part can be adjusted.

[0008] Since the device for generating pulsation for a washbasin toilet seat according to the present invention includes the stroke volume adjustment means with which the stroke volume of the linear motion element, which is linearly movable to change the volume of the pump chamber, can be adjusted, the change in the volume of the pump chamber can be reduced. This allows the pulsation to be achieved in a weaker form compared to the case where the stroke volume of the linear motion element corresponds to the full stroke, thus adequately meeting the diverse needs of the flushing process.

[0009] In the device for generating pulsation for a washbasin seat according to the present invention, the stroke volume adjustment means is a control means by which the electric motor is controlled, or can be controlled, so that it is driven alternately in the forward and reverse directions within a specific angular range of less than 180 degrees. This makes it possible to achieve a weaker pulsation without a complicated design of the device for generating pulsation.

[0010] In the device for generating pulsation for a washbasin seat according to the present invention, the electric motor is a DC motor with permanent magnets, wherein the DC motor is controlled, or can be controlled, by the control means such that it rotates in the forward direction when the current is switched on and in the opposite direction due to a cogging torque when the current is switched off. This makes it possible to achieve a weaker pulsation without a complex control system for the DC motor.

[0011] In the device for generating pulsation for a washbasin seat according to the present invention, the control means can also be used to implement a first actuation control, in which the duration of the current being switched on and the period of switching on and off are set so that the stroke of the linear motion element corresponds to a full stroke, and a second actuation control, in which the ratio between the duration of the current being switched on and the period of switching on and off is set smaller than in the case of the first actuation control, and a detent torque is used. This allows the wide range of flushing requirements to be easily met by changing the setting of the current being switched on and the period of the actuation control.

[0012] In the device for generating pulsation for a washbasin seat according to the present invention, several different time periods during which the current is switched on can also be set using the control means in the second actuation control. This allows even a weaker pulsation intensity to be adjusted, so that the wide range of flushing needs can be met even better. [Simple explanation of the drawings] Fig. Figure 1 shows a schematic representation of a washbasin / toilet seat according to the invention; Fig. Figure 2 shows a perspective exploded view of a pulsating pump; Fig. Figure 3 shows a cross-sectional view of the pulsating pump; Fig. Figure 4 shows a block diagram of a drive control for the pulsating pump of the washbasin seat; Fig. Figure 5 shows a flowchart of the control processing of the pulsating pump; Fig. Figure 6 shows a diagram of the stroke volume as a function of a flushing mode and the strength of the water flow; Fig. Figure 7 shows a diagram of an actuation signal and the stroke quantity when performing a full stroke control; Fig. Figure 8 shows a diagram of the relationship between a cogging torque and a rotation angle range of a DC motor for the washbasin seat; and Fig. Figure 9 shows a diagram of the actuation signal and the stroke quantity during the implementation of a small stroke control. [Emphasis of the invention]

[0013] The embodiment of the present invention is explained with reference to an exemplary embodiment. [Example of implementation]

[0014] Fig. Figure 1 shows a schematic representation of a washbasin toilet seat 10. Fig. Figure 2 shows a perspective exploded view depicting a pulsating pump 20 being pulled apart. Fig. Figure 3 shows a sectional view depicting the pulsating pump 20.

[0015] The washbasin seat 10 according to the exemplary embodiment comprises a pressure reducing valve 12 that reduces the pressure of the water supplied from a water supply line, a heating unit 14 that heats the pressure-reduced flushing water, a pulsating pump 20 that pulsates the flushing water dispensed from the heating unit 14, a flow channel diverter valve 16 that switches the flow channel of the flushing water dispensed from the pulsating pump 20, nozzles 19 (19a - 19c) that spray the flushing water towards the genital area, a control panel 50 with which the user can make various settings, and a control unit 40 that controls the entire device, as shown in Fig. Figure 1 shows this washbasin seat 10, which is designed to spray water for rinsing the genital area with pulsation. The washbasin seat 10 is further designed so that the control panel 50 allows adjustment of the flushing mode (namely, a powerful buttocks flush, a gentle buttocks flush, or a bidet flush), the temperature of the flushing water, the flow rate, the presence of pulsation, etc.

[0016] The pressure reducing valve 12 reduces the pressure of the rinse water, which is supplied from the water supply line through a strainer (not shown) and a solenoid valve, and then flushes this rinse water out. This pressure reducing valve 12 is designed to adjust (reduce) the rinse water pressure to a specific level so that a solenoid (not shown) is driven by a control signal from the control unit 40.

[0017] The heating unit 14 immediately heats the flowing rinse water discharged from the pressure reducing valve 12 by means of a ceramic heating element (not shown) and then discharges this rinse water. The heating unit 14 is designed to heat the rinse water to a specific, preset water temperature, so that the heating element is driven by the control signal from the control device 40.

[0018] As in Fig. 2 and Fig. As shown in Figure 3, the pulsating pump 20 consists of a pump part 20a, which draws in the rinse water output from the heating unit 14 through a suction opening 22a and discharges it through a discharge opening 22b, and a drive part 20b, which drives the pump part 20a.

[0019] The pump part 20a has a head part 22 in which the intake opening 22a and the discharge opening 22b are arranged, a body part 24 to which the head part 22 is attached and a pump chamber 24a is provided which is connected to the intake opening 22a and the discharge opening 22b, a diaphragm 26 which is an elastically deformable, film-shaped, approximately circular component and forms a wall of the pump chamber 24a located on the lower side in the drawing, a seal 28 arranged between the head part 22 and the body part 24 in which two check valves 28a, 28b for the intake opening 22a and the discharge opening 22b are formed, and which serves to seal between the head part 22 and the body part 24.The pump chamber 24a is defined by the inner wall of the body part 24 and the membrane 26, whereby the volume of the pump chamber 24a is increased or decreased by the elastic deformation of the membrane 26 in the inside-outside direction (in the vertical direction in the drawing).

[0020] The drive part 20b has a two-pole DC motor 30 with three slots, which has two permanent magnets and three slots; a first cover part 32 in which a through-hole for guiding the axis of rotation 30a of the DC motor 30 is formed and the DC motor 30 is mounted; a second cover part 33 attached to the body part 24, on which an annular support part for supporting the outer circumferential edge of the diaphragm 26 is provided on the upper part and into which the first cover part 32 is inserted; an eccentric cam 35 having a cylindrical part that is connected to the axis of rotation 30a of the DC motor 30 and is offset from the axis of rotation 30a by the eccentricity A; a cylindrical collar part 37 into which the cylindrical part of the eccentric cam 35 is inserted; and a piston part 39, wherein the collar part 37 is inserted into the cuboid interior of the piston part is insertedwhose internal dimensions in the vertical direction in the drawing are approximately the same size as the outer diameter of the collar part 37, and the piston part in the second cover part 33 is moved in the vertical direction in the drawing, and wherein the upper part of the piston part is connected to the diaphragm 26.

[0021] The pulsating pump 20 is designed such that the collar part 37 is displaced vertically by the eccentric rotation of the eccentric cam 35 generated by the rotation of the DC motor 30, and thus the piston part 39 is moved linearly in the vertical direction as shown in the drawing. That is, the rotary motion of the DC motor 30 is converted into linear motion by the eccentric cam 35, the collar part 37, and the piston part 39. Since the eccentric cam 35 is offset by the eccentricity A relative to the axis of rotation 30a of the DC motor 30, the stroke volume (full stroke volume) of the piston part 39 per rotation of the DC motor 30 corresponds to the value 2A. Since the piston part 39 pushes the diaphragm 26 up or down through the linear movement, the diaphragm 26 is elastically deformed in the inside-outside direction of the pump chamber 24a, so that the volume of the pump chamber 24a is increased or decreased.The rinsing water is pulsated by the pulsating pump 20 by opening or closing the check valves 28a, 28b as the volume of the pump chamber 24a increases or decreases, and by drawing the rinsing water into the pump chamber 24a from the suction opening 22a and expelling it from the pump chamber 24a through the discharge opening 22b.

[0022] The flow channel switching valve 16 is designed such that the output destination is selectively switched either to a powerful buttock flush flow channel 17a, connected to the powerful buttock flush nozzle 19a; to a gentle buttock flush flow channel 17b, connected to the gentle buttock flush nozzle 19b; to a bidet flush flow channel 17c, connected to the bidet flush nozzle 19c; or to a nozzle flush water channel (not shown). The flow channel switching valve 16 switches the flow channel of the output destination by actuating the solenoid (not shown) in response to the control signal from the control unit 40. This causes the flush water discharged from the discharge port 22b of the pulsating pump 20 to be discharged into the switched flow channel. At the tip of each nozzle 19a - 19c, an or more discharge holes are formed, wherein the flushing water guided through each flow channel 17a - 17c is discharged from the discharge hole orThe material is expelled through the ejection holes. As an example, it is shown that three nozzles 19a - 19c are provided. However, the number of nozzles can be freely chosen.

[0023] The control panel 50 has several buttons that allow the user to select various settings. These settings include, for example, the selection of the flushing mode (i.e., either the powerful buttock flushing mode, the gentle buttock flushing mode, or the bidet flushing mode), the selection of the flushing water temperature, the selection of the flushing water flow rate, the selection of whether or not the flushing water pulsation is present, and the start and stop commands. In this embodiment, the flushing water flow rate can be selected in five levels, which in the following descriptions are referred to as "least force," "weak," "medium," "strong," and "greatest force," respectively, from weakest to strongest.

[0024] The control unit 40 receives an operating signal entered by the user via the control panel 50. Based on the entered operating signal, the control unit 40 outputs a control signal either to the pressure reducing valve 12 and to the drive circuit of the solenoid of the flow channel switching valve 16, or to the drive circuit of the heater of the heating unit 14, or to the drive circuit of the DC motor 30 of the pulsating pump 20.

[0025] Fig. Figure 4 shows a block diagram of the drive control of the pulsating pump 20. The washbasin seat 10, as part of the drive control design for the pulsating pump 20, comprises a rectifier circuit 42, which rectifies an AC source, such as 100V AC, etc., and outputs the DC voltage, and a circuit 44, which applies the DC voltage output from the rectifier circuit 42 to the DC motor 30 of the pulsating pump 20 by switching the switching element. The DC voltage rectified by the rectifier circuit 42 is also supplied to the pressure reducing valve 12, the drive circuit of the flow channel diverter valve 16, etc.In the present embodiment, the pulsation of the pulsating pump 20 is modified based on the strength of the water flow, generating a pulsation in which the stronger the water flow, the shorter the period and the stronger the pulsation. The control unit 40 thus defines the period of the pulsation generated by the pulsating pump 20 based on the water flow control signal input via the control panel 50, and sets the rotational speed of the DC motor 30 based on this defined period. Based on the set rotational speed, the control unit generates an actuation signal to switch the switching element and outputs this signal to the circuit 44, which performs the actuation control.The actuation signal is primarily used to adjust the supply voltage for the DC motor 30 by changing the ratio of the on-time to one period. It is also possible to adjust the pulsation strength (period) independently of the water flow rate.

[0026] Next, the processing in the drive control of the pulsating pump 20 will be explained. Fig. Figure 5 shows a flowchart of the control processing of the pulsating pump performed by the control unit 40. During the control processing of the pulsating pump, the control unit 40 first assesses, based on the operating signal from the control panel 50, whether pulsation has been selected by the user or not (S100). If pulsation is not selected, this processing is terminated. If, however, it is assessed that pulsation is selected, it then assesses whether the gentle rinsing mode is selected (S110) and whether the water flow strength is set to "weak" or "lowest strength" (S120).If it is determined that in S110 not the mild buttock flush but either the strong buttock flush or the bidet flush is selected, and in S120 not "weak" or "least strength" but either "medium", "strong" or "greatest strength" is selected, the control unit 40 selects the full-stroke control (S130), in which the actuation control is carried out in such a way that the actuation signal that is in . Fig. As shown in Figure 4, the DC motor 30 (axis of rotation 30a) is set and rotated, thus causing the piston part 39 to reach its full stroke. That is, if the flushing process associated with the pulsation requires a water flow rate equal to or greater than a certain water flow rate, the full-stroke control (first actuation control) is executed, in which the piston part 39 reaches its full stroke. If, on the other hand, it is determined that the mild pelvic flush is selected in S110, or that either the strong pelvic flush or the bidet flush is selected in S110 and either "weak" or "least strength" is selected in S120, the control device 40 selects the small stroke control (second actuation control) (S150), in which the actuation control is implemented such that the DC motor 30 is rotated less than 180 degrees and thus the piston part 39 experiences the small stroke (not the full stroke).The small stroke control will be explained later.

[0027] Fig. Figure 6 shows a diagram of the number of strokes, which is determined by the flushing mode and the water flow rate. As shown, in this embodiment, the full-stroke control is selected if the flushing mode is set to either the powerful rectal flush or the bidet flush, and the water flow rate is set to either "medium," "strong," or "maximum." The small-stroke control is selected if the flushing mode is set to either the powerful rectal flush or the bidet flush, and the water flow rate is set to either "weak" or "lowest," and if, at all water flow rates, the flushing mode is set to the gentle rectal flush.The system is designed so that, in both the powerful anal flush and the bidet flush, the water flow intensity during the switch between full-stroke and low-stroke control is set to the same phase. However, this phase can be set to different phases. Furthermore, it is also possible to apply the full-stroke control to the gentle anal flush.

[0028] If full stroke control is selected in S130, the control unit 40 sets the actuation signal (S140) by determining the switched-on time based on the strength of the water flow and outputs the set actuation signal to the circuit 44 (S170), and the present processing is terminated.

[0029] Fig. Figure 7 shows a diagram of the actuation signal and stroke volume during full-stroke control. In full-stroke control, as explained above, the control is based on the actuation signal, where the ratio between the activation time and the period is determined by the strength of the water flow. For example, if the Fig. 7(a) If the activation signal shown is set to "strong" for the water flow strength, it is possible that the water flow strength "greatest" will be set to the "greatest" strength shown in Fig. 7(b) actuation signal shown, the activation time of which is longer than that shown in Fig. 7(a) case shown, is determined, and that for the strength of the water current “medium” the in Fig. 7(c) actuation signal shown, whose activation time is shorter than that shown in Fig. In the case shown in 7(a), the rotational speed of the DC motor 30 can be changed according to the strength of the water flow. Consequently, the pulsation generated by the pulsating pump 20 also varies according to the strength of the water flow. In full-stroke control, the activation time is set within the range in which the DC motor 30 can continue its 360-degree rotation, with the ratio between the activation time and the period being, for example, approximately 40%–70%. As a result, the piston section 39 continues its reciprocating motion with a stroke rate of 2A (±A). It is also possible to fine-tune the length of the period by changing the activation time.

[0030] If the small stroke control is selected in S150, the control unit 40 determines the on-time based on the strength of the water flow and sets the actuation signal with a longer period than a normal period (S160), and the set actuation signal is output to the circuit 44 (S170). Then the current processing is terminated.

[0031] In this case, the small stroke control according to the present embodiment serves to ensure that, when the power is switched off, the DC motor 30 is rotated by means of the cogging torque of the DC motor 30. Fig. Figure 8 shows a diagram of the relationship between the cogging torque and the rotational angular range of the DC motor 30. The DC motor 30, as described above, is a two-pole electric motor with three slots and has two permanent magnets 30b, 30c attached to the inner circumferential surface of the motor housing, and three slots 30d, 30e, 30f attached to the rotor, onto which the coil is wound. Since, in this DC motor 30, the least common multiple of the magnitude of 2 (number of permanent magnets 30b, 30c, number of poles) and the magnitude of 3 (number of slots 30d, 30e, 30f, number of slots) is 6, the angular distance for generating the cogging torque is 60 degrees (C1 - C6 in Fig. 8) It is assumed that, for example, starting from point C1 in the drawing, the DC motor 30 is rotated by a certain angle in the forward direction (here counterclockwise) during the switched-on time in one period ( Fig. 8 (1)). If, in this case, the angular range of slot 30f does not exceed the limit BL, i.e., the rotational speed is less than half the angular distance for generating the cogging torque (here less than 30 degrees), the rotor returns during the off-time when the DC motor 30 is not energized until, due to the cogging torque, it reaches the center of slot 30f, point C1 ( Fig. 8 (2)). That is, the DC motor 30 is rotated in the opposite direction (here clockwise). If the rotation angle of the DC motor 30 during the switched-on time is so large that the slot 30f exceeds the limit BL but does not exceed point C2, the rotor rotates during the switched-off time until, due to the cogging torque, it reaches the center of the slot 30f, point C2 ( Fig. 8 (3)). In the present embodiment, the small stroke control is achieved using the detent torque, which during the off time as in Fig. 8 (2) the rotor of the DC motor 30 travels, carried out.

[0032] Fig. Figure 9 shows a diagram of the actuation signal and the stroke volume during the implementation of the small-stroke control. In the small-stroke control, the rotation angle of the DC motor 30, when the current is switched on, is a specific angle that is less than half the angular distance required to generate the cogging torque. This is achieved by reducing the ratio between the on-time and the period compared to the ratio in the full-stroke control. Furthermore, the small-stroke control ensures that, during the off-time, the DC motor 30 is reliably rotated in the opposite direction by the cogging torque. This is achieved by setting a longer period than that used in the full-stroke control. In the small-stroke control, the on-time and the period are set such that the ratio between the on-time and the period is, for example, approximately less than 10%.In this way, the small-stroke control (second actuation control) is carried out using the cogging torque in such a way that the piston section 39 does not experience the full stroke. This is achieved by reducing the ratio between the activation time and the period compared to the ratio in the full-stroke control if the flushing associated with the pulsation occurs with a water flow rate that is weaker than a certain strength. Through such an actuation control, in which the cogging torque is used, the DC motor 30 alternately repeats the rotation generated by the current, which is performed forward by a certain angle, and the rotation generated by the cogging torque, which is performed in the opposite direction by a certain angle.Since the rotation, which is performed in the forward direction through a specific angle of less than 180 degrees (less than half a turn), is carried out, the piston part 39 alternately repeats the displacement made during the switched-on time by the small-stroke quantity a, which is less than the full-stroke quantity, and the return, which is carried out during the switched-off time by the small-stroke quantity a, without the piston part 39 carrying out the full stroke. Since the rotation angle of the DC motor 30 is fixed at less than 30 degrees, the small-stroke quantity a is less than approximately 1 / 6 of the stroke quantity A. Consequently, since the diaphragm 26 cannot be deformed significantly and the change in the volume of the pump chamber 24a is reduced, the pulsation of the flushing water is also weak.In this way, the actuation control in which the detent torque is used is designed in such a way that the weaker pulsation can be realized than in the case in which the piston part 39 experiences the full stroke.

[0033] Furthermore, it is possible to change the duration of the activation time in the small-stroke control based on the strength of the water flow. It is possible that this is in Fig. 9(a) is set when, for example, the flushing mode is the mild buttock flush and the water flow strength is “medium”, or when the flushing mode is the vigorous buttock flush or the bidet flush and the water flow strength is “lowest strength”. It is also possible that the Fig. 9(b) actuation signal shown, the activation time of which is longer than that of the Fig. 9(a), is determined if the flushing mode is the mild buttock flush and the water flow strength is “strong”, or if the flushing mode is the vigorous buttock flush or the bidet flush and the water flow strength is “weak”. Furthermore, it is possible that the in Fig. 9(c) actuation signal shown, the activation time of which is shorter than that of the Fig. 9(a), is set when the flush mode is the mild buttock flush and the water flow rate is "weak". The activation signal, the activation time of which is even longer than that of the Fig. 9(b) is set when the flushing mode is the mild buttock flush and the water flow strength is "maximum strength", and the activation signal, whose on-time is even shorter than that of the Fig. 9(c), is set when the flushing mode is the mild supine flush and the water flow strength is "lowest strength", etc., but this is not shown. This relationship relating to the duration of the activation time is merely an example, and thus the invention is not limited to what has been mentioned above. It is also possible to finely adjust the duration of a period depending on the change in the duration of the activation time. It is also possible to provide the period duration as adjustable. In any case, it is provided that the DC motor 30 is driven in a rotation angle range of less than 30 degrees. This allows the user's needs to be met by adjusting the pulsation strength, while realizing the weak pulsation generated by the actuation control, in which the cogging torque is used.

[0034] According to the pulsating pump 20 of the washbasin seat 10 as described above, the stroke of the piston part 39 is adjusted, thereby reducing the change in volume of the pump chamber 24a, by alternately rotating the DC motor 30 forwards and backwards through a specific angle of less than 180 degrees. This achieves a pulsation that is weaker than when the piston part 39 reaches its full stroke, thus meeting a wide range of flushing requirements. It is also possible to achieve a weaker pulsation simply by controlling the DC motor 30, without requiring a complex pulsating pump 20 design.

[0035] Since the pulsating pump 20, with the help of the cogging torque present during the off time in the actuation control of the DC motor 30, controls the DC motor 30 so that it is rotated in the opposite direction, the complicated control of the DC motor 30 does not need to be carried out and a special drive circuit for the small stroke control does not need to be provided.

[0036] Since the pulsating pump 20 can perform the full-stroke control (first actuation control), in which the piston part 39 experiences the full stroke, and the small-stroke control (second actuation control), in which the detent torque is used in such a way that by shortening the ratio between the on-time and the period compared to the ratio of the full-stroke control the piston part 39 does not experience the full stroke, the wide needs in flushing can be met by changing the setting of the on-time and the duration of a period of the actuation control.

[0037] Since the pulsating pump 20 can set several different time intervals in addition to the switched-on time of the current in the small stroke control (second actuation control), the broader needs can be met even better by adjusting the strength of the weaker pulsation.

[0038] In the pulsating pump 20 according to the exemplary embodiment, it is provided that in the small-stroke control, the rotation angle of the DC motor 30, which is operating below the switched-on time, is less than half the angular distance for generating the cogging torque (e.g., less than 30 degrees). However, the invention is not limited to this. It is also possible to provide the rotation angle such that it lies within the angular range (less than 180 degrees) in which the full stroke is not performed, and the DC motor 30 is rotated in the opposite direction due to the cogging torque when the current is switched off. The DC motor 30 is, for example, in the Fig. In example 8, the slot 30f is rotated so that it does not cross the boundary BL between points C1 and C2. It is also possible to rotate the DC motor 30 so that slot 30f does not cross the boundary between points C2 and C3, and so on.

[0039] In the pulsating pump 20 according to the exemplary embodiment, the duration of the on-time is changed in the small-stroke control based on the strength of the water flow. However, it is not limited to this. It is also possible to set the duration of the on-time without change in the small-stroke control.

[0040] In the pulsating pump 20 according to the exemplary embodiment, the rotation of the DC motor 30 is converted into linear motion via the eccentric cam 35, the collar part 37, and the piston part 39. However, it is not limited to this. It is also possible to convert the rotation of the DC motor 30 into linear motion by means of a crank mechanism, which has a crank arm connected to the axis of rotation 30a of the DC motor 30, performing circular motion around this connection point, and a rod attached at one end to the tip of the crank arm and at the other end to the piston part, etc.

[0041] In the pulsating pump 20 according to the exemplary embodiment, a two-pole DC motor 30 with three slots is shown by way of example. However, it is not limited to this. It is sufficient if the actuation control is designed such that, when the current is switched on, the electric motor is rotated forward by an angle of rotation that lies within the angular distance for generating the cogging torque, which is determined by the number of magnetic poles and the number of slots of the electric motor, and when the current is switched off, the electric motor is rotated (returned) in the opposite direction due to the cogging torque.

[0042] The pulsating pump 20 according to the exemplary embodiment is designed as a diaphragm pump in which the pulsation is generated by changing the volume of the pump chamber 24a by means of the diaphragm 26. However, it is not limited to this. Any pump can be used, provided it can generate the pulsation. It is also possible to design the pump such that the volume of the pump chamber is directly increased or decreased by the linear movement of the piston part 39.

[0043] In the pulsating pump 20 according to the exemplary embodiment, the counter-rotation of the DC motor 30 is effected by means of the cogging torque. However, it is not limited to this. It is also possible, for example, to switch the current supply to the DC motor 30 such that the DC motor 30 is alternately rotated forward and reverse within an angular range of less than half a revolution (less than 180 degrees). In this case, the drive circuit of the DC motor 30 can be implemented by an H-bridge circuit, etc., in which four switching elements are arranged in an H-shape around the DC motor 30 as its center, and the control can be designed such that the electric current corresponding to the forward direction and the electric current corresponding to the reverse direction are supplied to the DC motor 30 alternately.

[0044] In the pulsating pump 20 according to the exemplary embodiment, either the full-stroke control or the small-stroke control is selected based on the flushing mode and the strength of the water flow. However, it is not limited to this. For example, it is possible that either the full-stroke control or the small-stroke control is selected solely based on the flushing mode, or that the pulsation strength can be directly adjusted and either the full-stroke control or the small-stroke control is selected based on the set pulsation strength.

[0045] The relationship between the essential elements in the exemplary embodiment and the essential elements in the section "Means of solving the problem" is explained. In the exemplary embodiment, the DC motor 30, the pump chamber 24a, the piston part 39, and the control device 40, which are located in Fig.5 performs the control processing of the pulsating pump, each for the “motor”, the “pump chamber”, the “linear motion part” and the “stroke quantity setting means” (“control means”).

[0046] Since the correspondence between the essential elements in the exemplary embodiment and the essential elements in the section "Means of Solving the Problem" is an example to concretely explain the embodiment for carrying out the invention described in the section "Means of Solving the Problem," the elements described in the section "Means of Solving the Problem" are not limited to this correspondence. That is to say, the interpretation of the invention described in the section "Means of Solving the Problem" is to be made based on the information in that section, and the exemplary embodiment is merely a concrete example of the invention described in the section "Means of Solving the Problem."

[0047] As explained above, the exemplary embodiment of the present invention has been described. However, the present invention is not limited to such an exemplary embodiment. It is understood that the present invention can be implemented in various embodiments, provided they do not deviate from the framework of the core of the present invention. [Industrial application]

[0048] The present invention is applicable to the manufacturing industry of washbasin toilet seats. [List of reference symbols] 10 Washbasin toilet seats 12 Pressure reducing valve 14 heating units 16 Flow channel switching valve 17a powerful gluteal flushing channel 17b mild gluteal flushing channel 17c Bidet flushing channel 19a powerful buttocks flushing nozzle 19b mild buttocks rinse nozzle 19c Bidet flush nozzle 20 pulsating pumps 20a Pump part 20b Drive part 22 Headboard 22a Intake opening 22b Ejection port 24 Body part 24a Pump chamber 26 Membran 28 Seal 28a, 28b Check valve 30 DC motor 30a Rotary axis 32 first cover part 33 second cover part 35 eccentric cam 37 Collar part 39 Piston part 40 Control unit 42 Rectifier circuit 44 circuit 50 Control panel

Claims

[1] Device for generating pulsation for a washbasin seat (10) with which the flushing water spraying towards the human genitals is pulsated, the device comprising the following elements: an electric motor (30); a linear motion element (39) that is linearly movable such that the volume of a pump chamber (24a) arranged on a flow channel of the rinse water is changed depending on the rotation of the electric motor (30); and a stroke quantity setting means (40) with which the stroke quantity of the linear motion part (39) can be adjusted, wherein the stroke quantity setting means (40) is a control means (40) with which the electric motor (30) can be controlled so that it is driven alternately in the forward direction and in the opposite direction within a certain angular range which includes less than 180 degrees, the electric motor (30) is a DC motor (30) with permanent magnets, and the DC motor (30) can be controlled by the control means (40) such that it rotates in the forward direction when the current is switched on and in the opposite direction when the current is switched off due to a cogging torque. [2] Device for generating the pulsation for a washbasin seat (10) according to claim 1, wherein a first actuation control in which the control is implemented such that the on-time of the current and a period of switching on and off are set so that the stroke quantity of the linear motion part (39) corresponds to a full stroke, and a second actuation control in which the ratio between the time of the switched-on current and the period of switching on and off is set smaller than in the case of the first actuation control, and the detent torque is used, can be implemented with the control means (40). [3] Device for generating the pulsation for a wash-toilet seat (10) according to claim 2, wherein several different time durations for the duration of the switched-on current can be set using the control means (40) in the second actuation control.

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