JP2015227601A - Pump device and human body private part washing apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump device having a simple structure including a drive force conversion mechanism for converting a rotational power into a linear power and a human body private part washing apparatus including the same.SOLUTION: The pump device 1 includes: a displacement member 10 for drawing or pushing out a fluid; and a drive force conversion mechanism that converts a rotational power of a driving source 50 into a linear power and transmits the same to the displacement member 10. The drive force conversion mechanism includes: a transmission member 20 connected to the displacement member 10; and a guide part 412 that guides the transmission member 20 so as to reciprocate in a predetermined direction. The transmission member 20 and the guide part 412 are engaged with each other at the side opposite to the side where the displacement member 10 is positioned.

Description

  The present invention relates to a pump device having a power conversion mechanism that converts rotational power into linear power, and a human body local cleaning device including the pump device.

  The following Patent Document 1 describes a pump device that includes a power conversion mechanism that converts rotational power of a motor into linear power and transmits it to a piston. The power of the eccentric ring (135) rotated by the motor is transmitted to the piston (137) through the slide frame (361). The slide frame is regulated so as to move linearly by guide portions (363) located on both sides in the width direction.

JP 2004-100255 A

  In the pump device described in Patent Document 1, the guide portions are arranged on both sides in the width direction of the slide frame, and the space below the slide frame (opposite side of the piston) is used to transmit the power of the motor to the eccentric wheel. Since the structure is used as a space for installing gears and the like, the apparatus is increased in size and complexity.

  The problem to be solved by the present invention is to provide a pump device having a simple structure including a power conversion mechanism for converting rotational power into linear power, and a human body local cleaning device including the pump device.

  In order to solve the above problems, a pump device according to the present invention includes a displacement member that draws or pushes fluid, and a power conversion mechanism that converts rotational power of a drive source into linear power and transmits the linear power to the displacement member. The power conversion mechanism includes a transmission member connected to the displacement member, and a guide portion that guides the transmission member to reciprocate in a predetermined direction. The transmission member and the guide portion are located at the displacement member. It is engaged on the opposite side to the side.

  The transmission member may have one guided portion that engages with the guiding portion.

  The transmission member may be connected to the center of the displacement member, and the guided portion may be provided such that a central axis thereof passes through the center of the displacement member.

  The displacement member is a deformable member, and the displacement member may be deformed by the reciprocating motion of the transmission member so that fluid is drawn or pushed out.

  The transmission member has a main body portion that engages with a cam member that is displaced by receiving the power of the drive source, and the main body portion releases the displacement of the cam member in a direction orthogonal to the predetermined direction. An escape portion may be formed.

  In order to solve the above-described problems, a human body local cleaning device according to the present invention includes the pump device, and a cleaning nozzle in which a jet nozzle that ejects water transported by the pump device toward a local part of the human body is formed. Is.

  In the pump device according to the present invention, the structure of the device is simplified because the transmission member and the guiding portion for guiding it are engaged on the side opposite to the side where the displacement member is located.

  If the transmission member has one guided portion that engages with the guide portion, the number of engagement points between the transmission member (guided portion) and the guide portion is reduced, so that resistance and noise are reduced due to the engagement of both. Leads to.

  If the center axis of the guided portion is provided so as to pass through the center of the displacement member (the connecting portion between the displacement member and the transmission member), the transmission member smoothly reciprocates.

  In the case of a pump device configured such that fluid is drawn or pushed out by deformation of the displacement member, if the transmission member has a structure that does not linearly move, the displacement member is twisted and durability is lowered. Fluid is drawn or pushed out For this reason, there arises a problem that the volume fluctuation of the space is not stable. In the pump device according to the present invention, since the transmission member is linearly operated by the guide portion, the torsion of the displacement member is reduced (the deformation mode is stabilized), and the durability of the displacement member is improved. The volume fluctuation of the space for drawing or pushing out can be stabilized.

  If the relief member for escaping the displacement of the cam member in the direction orthogonal to the predetermined direction is formed on the main body of the transmission member, a smooth reciprocation of the transmission member is realized.

  The said pump apparatus can be applied as a pump apparatus of the human body local cleaning apparatus which supplies water to the washing nozzle which spouts water toward the local part of a human body.

It is a disassembled perspective view of the pump apparatus concerning one Embodiment of this invention. It is sectional drawing (sectional drawing cut | disconnected by the plane orthogonal to the front-back direction) of the pump apparatus concerning one Embodiment of this invention. It is sectional drawing (sectional drawing cut | disconnected by the plane orthogonal to a horizontal direction) of the pump apparatus concerning one Embodiment of this invention. It is an external view of the transmission member and the displacement member connected to it. It is the figure which showed the state by which the human body local cleaning apparatus concerning one Embodiment of this invention was accommodated in the accommodating part. It is a conceptual diagram (figure which showed the water circuit) of the human body local cleaning apparatus concerning one Embodiment of this invention.

  Hereinafter, a pump device 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. In the following description, the lateral direction refers to the X-axis direction shown in FIG. 2, the front-rear direction refers to the Y-axis direction illustrated in FIG. 3, and the vertical direction refers to the Z-axis direction illustrated in FIGS. . However, these directions do not limit the installation direction of the pump device 1.

  The pump device 1 according to the present embodiment includes a displacement member 10, a transmission member 20, a cam member 30, and a case 40 in which these members are accommodated. The displacement member 10 is a film-like member made of an elastically deformable material. The displacement member 10 in the present embodiment is a substantially circular film-like member (so-called diaphragm) formed of a rubber material. The displacement member 10 is disposed so as to face a fluid space 43 described later.

  The transmission member 20 is a member connected to the displacement member 10. The transmission member 20 in the present embodiment includes a main body portion 21, a guided portion 22, and a connection portion 23. The main body 21 is a portion in which a space of a predetermined size (hereinafter referred to as a cam engagement space 211) having a substantially rectangular parallelepiped shape is formed. Specifically, when viewed in a cross section cut along a plane (XZ plane) along the vertical direction and the horizontal direction, the cam engagement space 211 has a substantially rectangular shape that is long in the horizontal direction (see FIG. 2).

  The guided portion 22 is a shaft-shaped portion that protrudes downward from the lower surface of the main body portion 21. The guided portion 22 in the present embodiment has an axial shape with a circular cross section. The guided portion 22 is engaged with a guiding portion 412 described later. The connection part 23 is a part protruding upward from the upper surface of the main body part 21. Such a connecting portion 23 is connected to the displacement member 10. In the present embodiment, the connection portion 23 (the transmission member 20) is connected to the center of the displacement member 10. The connection structure of the connection part 23 (transmission member 20) and the displacement member 10 may be anything. In this embodiment, the connection part 23 and the displacement member 10 are connected by the screw. Thus, since the displacement member 10 is connected to the transmission member 20, the displacement member 10 is deformed when the transmission member 20 is displaced.

  The cam member 30 is a member for transmitting the power of the drive source to the transmission member 20. The cam member 30 includes, for example, a connecting portion 30a (resin component) to the motor 50 and a contact portion 30b (metal component) to the transmission member 20, so that the sliding between the motor 50, the cam member 30 and the transmission member 20 is achieved. Although the mobility is improved (sliding resistance is reduced), the connecting portion 30a and the contact portion 30b may be integrally formed of resin or metal. In this embodiment, the motor 50 is used as a drive source. The cam member 30 has a circular cross-sectional shape cut along a plane (XZ plane) along the vertical direction and the horizontal direction. The center of the circle (hereinafter referred to as the center of the cam member 30) and the rotation center 50c of the motor 50 are included. The positions do not match. That is, the center of the cam member 30 is “eccentric” with respect to the rotation center 50 c of the motor 50. Therefore, when the motor 50 is driven, the cam member 30 rotates with a position different from the center as the rotation center 50c.

  The cam member 30 is engaged with a cam engagement space 211 formed in the main body portion 21 of the transmission member 20. The size of the cam engagement space 211 in the vertical direction is substantially equal to the diameter of the cam member 30. On the other hand, the size of the cam engagement space 211 in the lateral direction is larger than the diameter of the cam member 30. That is, in the lateral direction, there is a gap 211s between the inner side surface of the main body 21 (the wall surface facing the cam engagement space 211) and the cam member 30 (see FIG. 2). Part)).

  The case 40 that accommodates each member includes a first case member 41 and a second case member 42. The first case member 41 is a cylindrical member having a bottom in which a space in which the transmission member 20 is accommodated (hereinafter, the transmission member accommodation space 411) is formed. The first case member 41 in the present embodiment is configured by combining a motor-side first case 41a and an outer first case 41b. On the bottom of the first case member 41, a guide portion 412 that is a recess or hole having a circular cross section is formed. The central axis of this guiding portion 412 is along the vertical direction. The size of the guiding portion 412 (circle diameter) is set to be slightly larger than the size (circle diameter) of the guided portion 22 of the transmission member 20, and the guided portion 412 is guided to the guided portion 412. The part 22 is fitted. That is, the transmission member 20 can move only in the vertical direction because the guided portion 22 is guided (guided) by the guiding portion 412.

  The central axis of the guided portion 22 (guide portion 412) passes through the center of the displacement member 10 (that is, the connection portion between the transmission member 20 and the displacement member 10). The central axis of the guided portion 22 (guide portion 412) coincides with a line (surface) that bisects the transmission member 20 (main body portion 21) in the lateral direction. That is, the central axis of the guided part 22 (guide part 412), the line passing through the center of the displacement member 10, and the line bisecting the transmission member 20 (main body part 21) in the horizontal direction match. The transmission member 20 has a main body portion 21 located in the transmission member accommodation space 411 and can move within a range in which the main body portion 21 does not contact the inner wall surface of the transmission member accommodation space 411.

  The second case member 42 is provided so as to cover the opening of the transmission member accommodation space 411 formed in the first case member 41. The peripheral portion of the displacement member 10 is sandwiched between the first case member 41 and the second case member 42. A space (hereinafter referred to as a fluid space 43) is constructed by the displacement member 10 and the second case member 42. Also, two through holes are formed on the opposite side (upper wall) of the second case member 42 to the first case member 41. One of the through holes is a flow path for fluid flowing into the fluid space 43 (hereinafter referred to as a fluid inlet 421), and the other is a flow path for fluid flowing out from the fluid space 43 (hereinafter referred to as a fluid outlet 422). .

  In the present embodiment, a check valve 423 for preventing a backflow of fluid is provided at the fluid outlet 422. In addition, on the upper side of the second case, an input side connecting portion 441 to which an input side hose is connected, an output side connecting portion 442 to which an output side hose is connected, and a fluid space 43 when the transport of fluid is stopped. A head member 44 having an atmospheric communication passage 443 (a passage opened to the atmosphere) for making the inside atmospheric pressure (breaking the negative pressure) is provided. A seal member 45 for preventing water leakage is provided around the flow path between the second case member 42 and the head member 44.

  The operation (operation) of the pump device 1 having such a configuration is as follows. When the motor 50 which is a driving source is driven, the cam member 30 rotates. The cam member 30 rotates with a position different from the center of the cam member 30 as a rotation center 50c. When the cam member 30 rotates in this way, the transmission member 20 is pushed by the cam member 30. Specifically, the wall surface on the cam engagement space 211 side in the main body 21 of the transmission member 20 is pushed. Since the cam engagement space 211 has the same size in the vertical direction as the cam member 30 in that direction, and the transmission member 20 has the guided portion 22 that engages with the guide portion 412, the cam member rotates eccentrically. The movement 30 is transmitted as the vertical movement of the transmission member 20. The horizontal size of the cam engagement space 211 is sufficiently larger than the size of the cam member 30 in that direction (the gap is set so that the cam member 30 does not contact the horizontal wall surface facing the cam engagement space 211). Therefore, the transmission member 20 does not receive a lateral force from the cam member 30.

  Thus, when the cam member 30 rotates, the transmission member 20 having the guided portion 22 that engages with the guiding portion 412 reciprocates in the vertical direction. When the transmission member 20 moves downward, the displacement member 10 connected thereto is pulled downward. Since the peripheral part is pinched | interposed between the 1st case member 41 and the 2nd case member 42, the displacement member 10 deform | transforms so that the center may move below. Therefore, the fluid space 43 formed by the displacement member 10 and the second case member 42 is expanded. That is, the fluid is drawn into the fluid space 43 through the fluid inlet 421.

  When the transmission member 20 moves upward, the displacement member 10 connected to the transmission member 20 is pushed upward. That is, the center of the displacement member 10 moves upward. Therefore, the fluid space 43 formed by the displacement member 10 and the second case member 42 is narrowed. That is, the fluid in the fluid space 43 is pushed out through the fluid outlet 422. Thus, when the transmission member 20 reciprocates in the vertical direction, the fluid space 43 is repeatedly “expanded” and “narrowed” by the deformation of the displacement member 10. That is, the fluid is drawn into the fluid space 43, and the fluid is transported by repeating the state where the drawn-in fluid is pushed out. Since the pressure change occurs in the fluid space 43 due to the displacement (deformation) of the displacement member 10, the pressure of the fluid output from the pump device 1 also increases and decreases. That is, the output fluid “pulsates”.

  As described above, in this embodiment, the cam member 30, the transmission member 20 (guided portion 22), and the guide portion 412 convert the rotational power of the motor 50 into linear power and transmit it to the displacement member 10. Has been built.

  In the pump device 1 according to the present embodiment described above, the guiding portion 412 that guides the transmission member 20 to move in the vertical direction is the guided portion 22 of the transmission member 20 on the side opposite to the side where the displacement member 10 is located. Is engaged. That is, a simple device structure is provided in which the displacement member 10 is provided on one side in the vertical direction and the configuration (a part of the power conversion mechanism) for moving the transmission member 20 in the vertical direction is provided on the other side.

  Moreover, in this embodiment, the to-be-guided part 22 provided in order to move the transmission member 20 to an up-down direction is one. That is, since one guided portion 22 is engaged with the guiding portion 412, there are few places where the transmission member 20 (guided portion 22) and the guiding portion 412 are engaged, and resistance and noise are reduced due to the engagement of both. Leads to.

  In particular, the one guided portion 22 is provided such that its central axis passes through the center of the displacement member 10, which is a connection portion between the displacement member 10 and the transmission member 20 (the portion for guiding the transmission member 20). Because the connecting portion of the transmission member 20 and the displacement member 10 is located on the coaxial line), the transmission member 20 reciprocates smoothly.

  Further, in the case of a pump device configured such that fluid is drawn or pushed out by deformation of the displacement member, if the transmission member has a structure that does not operate linearly, durability is lowered by twisting the displacement member, and the fluid is drawn Alternatively, there arises a problem that the volume variation of the space for extrusion is not stable. However, in the pump device 1 according to the present embodiment, the transmission member 20 is linearly operated by the guide portion 412, so that the displacement member 10 is twisted. It is possible to improve the durability of the displacement member 10 by being reduced (the deformation mode is stabilized) and to stabilize the volume fluctuation of the space (fluid space 43) for drawing or pushing out the fluid.

  The pump device 1 according to the above embodiment can be applied to the human body local cleaning device 6. A human body local cleaning device 6 (a human body local cleaning device according to an embodiment of the present invention) includes at least the pump device 1 and the cleaning nozzle 61. As shown in FIG. 5, the human body local cleaning device 6 is accommodated in an accommodating portion 91 provided behind the toilet seat 90. The cleaning nozzle 61 constituting the human body local cleaning device 6, the nozzle drive mechanism for driving the cleaning nozzle 61, and piping such as a hose for supplying local cleaning water to the cleaning nozzle 61 are accommodated in the accommodating portion 91. ing.

  When the nozzle drive mechanism is driven and the cleaning nozzle 61 is advanced, a part of the front end side of the cleaning nozzle 61 reaches a cleaning position (a plurality of cleaning positions may be set) exposed to the outside of the housing portion 91. That is, the ejection port formed on the tip side of the cleaning nozzle 61 is exposed. The nozzle driving mechanism that slides the cleaning nozzle 61 in the front-rear direction can be applied with a known configuration, and thus the description thereof is omitted.

  As shown in FIG. 6, the pump device 1 is provided on the upstream side (water source side) of the cleaning nozzle 61. The fluid (cleaning water) supplied to the cleaning nozzle 61 is “pulsated” by the pump device 1. Thereby, the feeling of cleaning at the time of local cleaning can be improved. Although not shown, the water circuit from the water source to the cleaning nozzle 61 includes a device for adjusting the temperature of the water (warming the water), a check valve for preventing the backflow of water, and supply of water to the cleaning nozzle 61. Other devices such as a valve device for controlling availability may be provided.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, the displacement member 10 in the above embodiment is a deformable member, and it has been described that the fluid is conveyed by the size of the fluid space 43 being changed by the deformation. However, the displacement member is formed of a hard material. It may be a member. That is, a configuration in which the size of the fluid space 43 is changed by changing the position of the displacement member (a configuration using a piston that changes the size of the fluid space 43 as the displacement member) may be employed. Thus, the displacement member may change the size of the fluid space 43 by deforming itself, or change the size of the fluid space 43 by changing the position. May be. In the present invention, both cases are included in the “displacement”.

DESCRIPTION OF SYMBOLS 1 Pump apparatus 10 Displacement member 20 Transmission member 21 Main-body part 211 Cam engagement space 211s Clearance (relief part)
22 guided portion 30 cam member 40 case 41 first case member 411 transmission member accommodating space 412 guiding portion 42 second case member 421 fluid inlet 422 fluid outlet 43 fluid space 50 motor 6 human body local cleaning device 61 cleaning nozzle

Claims (6)

A displacement member that draws or pushes fluid;
A power conversion mechanism that converts rotational power of a drive source into linear power and transmits the linear power to the displacement member;
With
The power conversion mechanism includes a transmission member connected to the displacement member, and a guide unit that guides the transmission member to reciprocate in a predetermined direction.
The pump device, wherein the transmission member and the guide portion are engaged on the side opposite to the side where the displacement member is located.   The pump device according to claim 1, wherein the transmission member has one guided portion that engages with the guiding portion. The transmission member is connected to the center of the displacement member,
The pump device according to claim 2, wherein the guided portion is provided such that a central axis thereof passes through a center of the displacement member.   The displacement member is a deformable member, and the displacement member is deformed by the reciprocating motion of the transmission member, so that fluid is drawn or pushed out. The pump device according to one item. The transmission member has a main body that engages with a cam member that is displaced by receiving power from the drive source,
The pump device according to any one of claims 1 to 4, wherein an escape portion is formed in the main body portion to release displacement of the cam member in a direction perpendicular to the predetermined direction. The pump device according to any one of claims 1 to 5,
A cleaning nozzle in which a jet port is formed for jetting water conveyed by the pump device toward a local part of the human body;
A human body local cleaning device.

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