JP7206833B2 - Pumping device and washing toilet seat device - Google Patents

Description

The present invention relates to a pumping device and a flushing toilet seat device.

Conventionally, this type of pump device has been proposed for use in a washing toilet seat device for washing the private parts of the human body, in which cleansing water is drawn in from an inlet and discharged from an outlet by reciprocating movement of a piston in a cylinder. (See Patent Document 1, for example). In this pump device, a suction port and a discharge port are provided at one end side of the cylinder in the axial direction, and a seal member attached to the outer peripheral surface of the piston allows the air flow to flow from between the cylinder and the piston to the other axial end side in the axial direction. Prevents washing water from leaking.

Japanese Patent No. 3882570

However, in the pump device described above, if the seal member deteriorates over time or is damaged, the washing water may leak from between the cylinder and the piston to the other end side in the axial direction. If this happens, the washing water will leak from the sliding part between the piston rod connected to the piston and the end wall of the cylinder, and will enter the driving part including the motor and gear mechanism that drives the piston (piston rod), causing adverse effects on the equipment. There is a risk of

A main object of the present invention is to prevent liquid leaking from between a cylinder and a piston from reaching a driving part with a simple structure.

The present invention employs the following means in order to achieve the above main object.

The pump device of the present invention is
a cylinder having a liquid suction port and a liquid discharge port formed at one end in the axial direction;
a piston slidable within the cylinder;
a piston rod connected to the piston and slidably penetrating an end wall on the other axial end side of the cylinder;
a drive unit for reciprocating the piston rod;
A pump device comprising
The gist is that the cylinder is formed with a discharge port for discharging the liquid at the other end side in the axial direction.

In the pump device of the present invention, the cylinder has a liquid suction port and a liquid discharge port formed at one end side in the axial direction, and a discharge port for discharging the liquid is formed at the other axial end side. As a result, even if liquid leaks from between the cylinder and the piston to the other end in the axial direction, the liquid can be discharged from the discharge port, preventing the liquid from leaking from between the cylinder and the piston. can do. Therefore, it is possible to prevent the liquid leaking from between the cylinder and the piston from reaching the driving part with a simple structure forming the discharge port. Note that the cylinder may have a discharge port formed at the other end in the axial direction for discharging the liquid in the radial direction.

In the pump device of the present invention, a storage part is provided that communicates with the discharge port and is capable of storing the liquid discharged from the discharge port, and the storage part includes a check valve in the discharge path connected to the discharge port. It is also possible to form an outflow port that communicates with the discharge passage through the discharge passage and allows the stored liquid to flow out to the discharge passage. With this configuration, the discharged liquid can be stored and flowed out to the discharge passage, so that the liquid leaked from between the cylinder and the piston can be effectively used. In addition, since the liquid stored in the storage portion opens the check valve by its own weight and flows out to the discharge path, the leaked liquid can be effectively used with a simple structure.

In the pump device of the present invention, the two cylinders formed in a cylindrical shape are provided adjacent to each other, and the reservoir is provided so as to fit between the arc-shaped outer walls of the two cylinders. can also In this way, even if the reservoir is provided, the pump device can be made compact.

The washing toilet seat device of the present invention is
Any pumping device as described above;
an introduction path for introducing cleaning water supplied from a water supply source;
an open tank that stores the wash water introduced through the introduction path and forms an air gap with the introduction path;
a washing nozzle for injecting washing water toward the private parts of the human body;
A washing toilet seat device comprising:
The pump device sucks the wash water stored in the tank through the suction port, discharges the wash water through the discharge port, and supplies the wash water to the wash nozzle.

Since the washing toilet seat device of the present invention includes any one of the pump devices described above, the effect of the pump device of the present invention is that wash water leaking from between the cylinder and the piston reaches the drive unit. can be effectively prevented with a simple configuration that forms the discharge port.

1 is a configuration diagram showing an outline of the configuration of a washing toilet seat device 10. FIG. 3 is a configuration diagram showing the outline of the configuration of a water supply path 20 and a nozzle unit 30. FIG. 4 is a side view of pulsation pump 40. FIG. 4 is a bottom view of pulsation pump 40. FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3; 4 is a configuration diagram of a pump body 42. FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 4; FIG. 5 is a cross-sectional view taken along line CC of FIG. 4; FIG. 5 is a cross-sectional view taken along line DD of FIG. 4; It is explanatory drawing which shows a mode that the leaked water moves.

DETAILED DESCRIPTION OF THE INVENTION Embodiments for carrying out the invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram showing an outline of the configuration of the washing toilet seat device 10, and FIG. 2 is a configuration diagram showing an outline of the configuration of the water supply path 20 and the nozzle unit 30. As shown in FIG. 1, the washing toilet seat device 10 is attached to the upper surface of the toilet bowl 1, and includes a toilet seat device main body 12, a toilet seat 14 supported so as to be openable and closable with respect to the toilet seat device main body 12, and a toilet seat device main body 12. a toilet lid 16 supported so as to be openable and closable by the user; an operation panel 18 that allows various operations by the user; and a control device 38 (see FIG. 2) that controls the entire device.

As shown in FIG. 2, the water supply path 20 is configured by a primary side flow path 21 connected to a water supply source (not shown) and a secondary side flow path 22 connected to a nozzle unit 30. is provided with a water supply valve 23, an open tank 24 is provided between the primary side flow path 21 and the secondary side flow path 22, and a pulsation pump 40 and a heat exchange unit 26 are provided in the secondary side flow path 22. It is

The water supply valve 23 selectively switches between passing and stopping the water supplied from the water supply source. The open tank 24 is an air gap device that forms an air gap with the primary flow path 21 , stores water introduced from the primary flow path 21 , and sucks the stored water by the pulsation pump 40 . It is made to flow out to the secondary side flow path 22 . The open tank 24 is provided with a drain port 24a, and when the stored water reaches a predetermined amount, it is drained from the drain port 24a. In addition, the air gap of the open tank 24 prevents dirty water or the like that has flowed from the nozzle unit 30 into the secondary channel 22 from flowing back to the primary channel 21 (water supply source side). The pulsation pump 40 sucks washing water from the open tank 24 and discharges the sucked washing water to the heat exchange unit 26 (on the nozzle unit 30 side). The heat exchange unit 26 instantaneously heats the wash water discharged from the pulsation pump 40 by, for example, a ceramic heater, and outputs the heat to the nozzle unit 30 . In addition to these, the secondary flow path 22 is provided with a flow rate sensor for detecting the flow rate of the washing water, a temperature sensor for detecting the temperature of the washing water heated by the heat exchange unit 26, and the like.

The nozzle unit 30 includes a channel switching valve 31 , a Y-branch 32 , an anus washing nozzle 33 , a bidet washing nozzle 34 and a nozzle washer 35 . The buttocks washing nozzle 33 has a straight flow jet port 33a for jetting powerful cleansing water and a porous flow jet port 33b for jetting mild cleansing water at the tip side. move back and forth between The bidet washing nozzle 34 is formed with a porous flow injection port 34a for injecting mild washing water at its tip side, and moves back and forth between a washing position and a standby position by a driving device (not shown). The nozzle washer 35 is provided above the buttocks washing nozzle 33 and the bidet washing nozzle 34, and has a buttocks nozzle washing port 35a that discharges washing water to the tip side of the buttocks washing nozzle 33 at the standby position, and a bidet at the standby position. A bidet nozzle cleaning port 35 b for discharging cleaning water is formed on the tip side of the cleaning nozzle 34 .

The flow path switching valve 31 receives the wash water output from the heat exchange unit 26 of the secondary side flow path 22 and outputs it to one of the selected output destinations. The flow path switching valve 31 includes a straight flow injection port 33a of the buttocks washing nozzle 33, a porous flow injection port 33b of the buttocks washing nozzle 33, a porous flow injection port 34a of the bidet washing nozzle 34, a buttocks nozzle washing port 35a, and The output destination is selectively switched to one of the Y-branch 32 connected to the bidet nozzle cleaning port 35b. When the Y-shaped branch 32 is selected as the output destination, the cleansing water output from the flow path switching valve 31 is discharged from the buttocks nozzle cleaning port 35a and the bidet nozzle cleaning port 35b.

The operation panel 18 has a powerful washing switch that instructs powerful washing, a mild washing switch that instructs mild washing, a bidet washing switch that instructs bidet washing, a stop switch that instructs to stop washing, and adjustment of washing water temperature. A temperature adjustment switch to adjust the washing water pressure, a water pressure adjustment switch to adjust the force of the washing water, and the like are provided.

The control device 38 inputs operation signals input by the user through the operation panel 18, the flow rate detected by the flow sensor, the temperature detected by the temperature sensor, and the like. Further, the control device 38 controls the driving device for the water supply valve 23, the pulsating pump 40, the heat exchange unit 26, the flow path switching valve 31, the bottom washing nozzle 33, and the bidet washing nozzle 34 based on the input operation signal. etc. to output control signals.

The configuration of the pulsation pump 40 will be described below. 3 is a side view of the pulsation pump 40, FIG. 4 is a bottom view of the pulsation pump 40, FIG. 5 is a cross-sectional view along line AA of FIG. 3, and FIG. It is a diagram. 7 is a sectional view taken along line BB of FIG. 4, FIG. 8 is a sectional view taken along line CC of FIG. 4, and FIG. 9 is a sectional view taken along line DD of FIG. The pulsation pump 40, as shown in FIGS. 3 and 4, includes a pump section 40a and a drive section 40b. A pump cover 41 of the pump portion 40a is connected to a hose forming the secondary flow path 22, and constitutes the secondary flow path 22 with a suction joint 41a through which cleansing water sucked from the open tank 24 is sucked. A discharge joint 41b is provided to which a hose is connected and which discharges washing water to the heat exchange unit 26 side.

The pump part 40a includes a pump body 42 to which a pump cover 41 is attached, two cylinders 43 formed side by side in the pump body 42, and two pistons reciprocating in each cylinder 43 in the axial direction (vertical direction). 46, two piston rods 47 respectively connected to each piston 46, and a plate 48 which is arranged at the boundary with the driving portion 40b and forms the upper end wall of the cylinder 43. As shown in FIG. 6 shows the configuration of the cylinder 43 of the pump body 42 with the pump cover 41 removed. Each cylinder 43 has a suction port 44a communicating with the suction joint 41a through a check valve 45a and a discharge port 44b communicating with the discharge joint 41b through a check valve 45b. bottom end). Further, the piston rod 47 penetrates a plate 48 which is an end wall on the other end side (upper end in the drawing) of each cylinder 43 in the axial direction, and protrudes to the outside (toward the driving portion 40b). The cylinder 43 has a first space 43a at one end in the axial direction in which a suction port 44a and a discharge port 44b are formed, and a second space 43b at the other end in the axial direction in which a piston rod 47 is disposed. 46. A seal member 46a is attached to the outer peripheral surface of each piston 46, and water leaks from the first space 43a to the second space 43b through the gap between the outer peripheral surface of the piston 46 and the inner peripheral surface of the cylinder 43. suppress A seal member 48a is attached to a through-hole for the piston rod 47 formed in the plate 48 to prevent water leaking into the second space 43b from leaking to the driving portion 40b side.

Further, each cylinder 43 is provided with a discharge port 44c for discharging water in the radial direction on the side wall of the second space 43b, which is the other end side in the axial direction. In the present embodiment, a part of the side wall of each cylinder 43 is formed one step lower so as to have a gap between the cylinder 43 and the plate 48 through which water can flow out, thereby providing the discharge port 44c. Also, the discharge ports 44c of the two horizontally arranged cylinders 43 are provided so as to face each other. As shown in FIG. 6, the pump body 42 has a substantially triangular storage chamber 49 formed between the two cylinders 43 when viewed from above. The storage chamber 49 communicates with the discharge port 44c of each cylinder 43 at its upper portion, and stores the water discharged from the discharge port 44c. This storage chamber 49 is provided so as to be accommodated between the arc-shaped outer walls of the two cylinders 43 . An outflow port 49a is formed in the lower end wall of the storage chamber 49 and communicates with the discharge joint 41b via a check valve 45c to allow the stored water to flow out to the discharge joint 41b.

The drive unit 40b includes a motor 50, a gear case 52 formed with a through hole through which a rotating shaft 51 of the motor 50 passes, and to which the motor 50 is attached. a worm 53, a worm wheel 54 meshing with the worm 53, two eccentric cams 55 arranged on both sides (left and right sides) of the worm wheel 54, and each eccentric cam 55 within a rectangular frame. It has two slide members 57 that are fitted into each other and that can slide vertically within the gear case 52 . The slide member 57 has a lower portion connected to the piston rod 47 .

When the worm wheel 54 meshing with the worm 53 is rotated by the drive of the motor 50, the driving portion 40b is displaced vertically by the eccentric rotation of the eccentric cam 55, so that the slide member 57 reciprocates in the vertical direction. move. That is, the worm 53, the worm wheel 54, the eccentric cam 55, and the slide member 57 convert the rotary motion of the motor 50 into linear motion. Further, the reciprocating motion of the slide member 57 vertically reciprocates the piston rod 47 connected to the slide member 57 and the piston 46 connected to the piston rod 47 . The two eccentric cams 55 arranged on both sides of the worm wheel 54 are arranged at positions staggered in the vertical direction with the same eccentricity with respect to the rotation axis of the worm wheel 54 . Therefore, the two slide members 57 reciprocate while alternately sliding in the vertical direction due to the rotation of the worm wheel 54, so that the two pistons 46 (piston rods 47) also alternately reciprocate in the vertical direction. It will be.

In the washing toilet seat device 10 configured in this manner, when a user instructs a washing operation (bottom powerful washing, rear mild washing, bidet washing) by operating the operation panel 18, the flow path switching valve 31 outputs an output corresponding to the instruction. While switching first, the corresponding washing nozzle is advanced to the washing position, and the pulsating pump 40 is driven to wash the private part. In the pulsation pump 40, when the piston 46 reciprocates by driving the motor 50a of the driving portion 40b, the volume of the first space 43a of the cylinder 43 increases or decreases. Along with this, the check valves 45a and 45b are opened and closed, and wash water is sucked into the first space 43a from the suction joint 41a through the suction port 44a, and the wash water is sucked from the first space 43a through the discharge port 44b to the discharge joint 41b. washing water is discharged into the By repeating such suction and discharge, the pulsation pump 40 sucks up the cleansing water from the open tank 24 and supplies (discharges) the cleansing water to the nozzle unit 30 side. In addition, since the cleansing water discharged from the pulsation pump 40 is accompanied by pulsation, it is possible to enhance the feeling of cleansing when the cleansing water is jetted from each injection port to the private parts of the human body. In this embodiment, the pulsation pump 40 has two cylinders 43 and two pistons 46 alternately reciprocate. It is possible to prevent the frequency of the pulsation from greatly decreasing, thereby suppressing the deterioration of the feeling of cleansing.

Here, in the pulsation pump 40, the seal member 46a attached to the piston 46 may be deteriorated or damaged over time, and water (cleaning water) may easily leak from the first space 43a to the second space 43b. Also, the seal member 48a attached to the through-hole of the plate 48 may be deteriorated or damaged over time, making it easier for water to leak from the second space 43b to the driving portion 40b. FIG. 10 is an explanatory diagram showing how leaked water moves. In this embodiment, since the discharge port 44c is provided on the side wall of the second space 43b of the cylinder 43, even if water leaks from the first space 43a to the second space 43b (FIG. 10(1)), the water is discharged from the discharge port 44c. can be discharged (Fig. 10 (2)). Therefore, it is possible to prevent water leaking into the second space 43b from entering the drive unit 40b. Further, since the discharge port 44c communicates with the storage chamber 49, the water discharged from the discharge port 44c is stored in the storage chamber 49 (FIG. 10(3)). When the water pressure increases due to its own weight, the water stored in the storage chamber 49 opens the check valve 45c and flows out from the outlet 49a into the discharge joint 41b (FIG. 10(4)). Therefore, the water that has leaked from the first space 43a to the second space 43b can be returned from the discharge joint 41b to the secondary flow path 22 as washing water for washing the local area (Fig. 10 (5)). Water can be used effectively.

In the pulsation pump 40 of this embodiment described above, since the discharge port 44c is formed in the side wall of the second space 43b of the cylinder 43, the water leaking from the first space 43a of the cylinder 43 to the second space 43b is discharged to the outside. can be prevented from being discharged into the drive unit 40b.

Further, the pulsation pump 40 is provided with a storage chamber 49 communicating with the discharge port 44c, and the storage chamber 49 communicates with the discharge joint 41b via a check valve 45c to remove leaked water (stored water) as washing water. can be returned from the outflow port 49a to the discharge joint 41b (secondary flow path 22). Further, the water stored in the storage chamber 49 opens the check valve 45c by its own weight and flows out to the discharge joint 41b, so that the leaked water can be effectively used with a simple structure.

Further, the pulsation pump 40 is provided with two cylinders 43 adjacent to each other, and the storage chamber 49 is provided so as to be accommodated between the arcuate outer walls of the two cylinders 43. Therefore, even if the storage chamber 49 is provided, the pump The pulsation pump 40 can be made compact without increasing the size of the body 42 .

In addition, since the pulsating pump 40 can be used both for sucking up the wash water from the open tank 24 and for generating pulsation, the cost can be reduced compared to the case where separate pumps are used. 10 (toilet seat device main body 12) can be suppressed from increasing in size.

In the embodiment, two cylinders 43 are provided in the pump body 42 of the pulsation pump 40, but the present invention is not limited to this, and only one cylinder 43 may be provided. may be provided.

In the embodiment, the storage chamber 49 is provided so as to fit between the two cylinders 43, but it is not limited to this, and may be provided so as to protrude from between the two cylinders 43, or may be provided so as to protrude from between the two cylinders 43. It may be provided in another place other than between the cylinders 43 .

In the embodiment, the storage chamber 49 is provided, and the water discharged from the discharge port 44c is stored in the storage chamber 49 and then flows out to the discharge side (discharge joint 41b). It is sufficient that the water is discharged to the outside from the discharge port 44c without providing the water discharge port 44c. For example, the water discharged from the discharge port 44c may flow into the toilet bowl 1 or the like.

In the embodiment, the pulsation pump 40 is used both for sucking up the cleansing water from the open tank 24 and for generating pulsation. It is good also as what is provided.

In the embodiment, the discharge port 44c discharges water in the radial direction of the cylinder 43. However, the discharge port is not limited to this. For example, the outlet may discharge water in an oblique direction between the axial direction and the radial direction.

In the embodiment, the pulsation pump 40 is used in the cleaning toilet seat device 10 for cleaning the human body's private parts. In addition, washing water used for washing human body parts is exemplified as the liquid, but it is not limited to this, and washing water used for washing other than human body parts may be used, or water supplied from a water supply source (tap water). ), or other liquids than water.

The correspondence relationship between the main elements of the embodiments and the main elements of the invention described in the column of Means for Solving the Problems will be described. In the embodiment, the suction port 44a corresponds to the "suction port", the discharge port 44b corresponds to the "discharge port", the cylinder 43 corresponds to the "cylinder", the piston 46 corresponds to the "piston", and the piston rod 47 corresponds to the "piston rod", the drive section 40b corresponds to the "drive section", the pulsation pump 40 corresponds to the "pump device", and the discharge port 44c corresponds to the "discharge port". Further, the storage chamber 49 corresponds to the "storage portion", the check valve 45c to the "check valve", the discharge joint 41b to the "discharge path", and the outlet 49a to the "outlet". do. In addition, the primary side flow path 21 corresponds to the "introduction path", the open tank 24 corresponds to the "tank", the buttocks washing nozzle 33 and the bidet washing nozzle 34 correspond to the "washing nozzle", and the washing toilet seat device 10 corresponds to the "washing toilet seat device".

Note that the correspondence relationship between the main elements of the embodiment and the main elements of the invention described in the column of Means for Solving the Problem indicates that the embodiment implements the invention described in the column of Means to Solve the Problem. Since it is an example for specifically explaining the mode for solving the problem, it does not limit the elements of the invention described in the column of the means for solving the problem. That is, the interpretation of the invention described in the column of Means to Solve the Problem should be made based on the description in that column, and the embodiment should be based on the description of the invention described in the column of Means to Solve the Problem. This is only a specific example.

As described above, the mode for carrying out the present invention has been described using the embodiment, but the present invention is not limited to such an embodiment at all, and various forms can be used without departing from the scope of the present invention. Of course, it can be implemented.

INDUSTRIAL APPLICABILITY The present invention can be used in the manufacturing industry of pump devices and washing toilet seat devices.

1 toilet bowl 10 toilet seat device 12 toilet seat device main body 14 toilet seat 16 toilet lid 18 operation panel 20 water supply channel 21 primary side channel 22 secondary side channel 23 water supply valve 24 open tank 24a Drain port 26 Heat exchange unit 30 Nozzle unit 31 Switching valve 32 Y-branch 33 Buttocks washing nozzle 33a Straight flow injection port 33b, 34a Porous flow injection port 34 Bidet washing nozzle 35 Nozzle washer 35a rear nozzle cleaning port, 35b bidet nozzle cleaning port, 38 control device, 40 pulsation pump, 40a pump section, 40b driving section, 41 pump cover, 41a suction joint, 41b discharge joint, 42 pump body, 43 cylinder, 43a first space , 43b second space, 44a inlet, 44b outlet, 44c outlet, 45a, 45b, 45c check valve, 46 piston, 46a, 48a seal member, 47 piston rod, 48 plate, 49 storage chamber, 49a outlet , 50 motor, 51 rotary shaft, 52 gear case, 53 worm, 54 worm wheel, 55 eccentric cam, 57 slide member.

Claims (3)

a cylindrical cylinder having a liquid suction port and a liquid discharge port formed on a lower end wall on one end side in the axial direction;
a piston slidable within the cylinder;
a piston rod that is connected to the piston and slidably penetrates an upper end wall that is the other axial end side of the cylinder;
a drive unit that reciprocates the piston rod in the vertical direction ;
A pump device comprising
The cylinder has an upper end formed with a discharge port for discharging the liquid in a radial direction ,
a reservoir communicating with the outlet and capable of storing the liquid discharged from the outlet;
a discharge passage connected to the discharge port on the lower end side of the pump device,
The storage portion communicates with the discharge path via a check valve, and has an outlet formed in the lower end wall for flowing out the stored liquid to the discharge path.
pump device. A pump device according to claim 1 ,
two said cylinders are provided adjacently,
The pump device, wherein the storage part is provided so as to be accommodated between the arc-shaped outer walls of the two cylinders. A pump device according to claim 1 or 2 ;
an introduction path for introducing cleaning water supplied from a water supply source;
an open tank that stores the wash water introduced through the introduction path and forms an air gap with the introduction path;
a washing nozzle for injecting washing water toward the private parts of the human body;
A washing toilet seat device comprising:
The pump device sucks cleansing water stored in the tank through the inlet, discharges cleansing water through the outlet, and supplies the cleansing water to the cleaning nozzle.

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