CN218717426U

CN218717426U - Water pump device and oral care equipment

Info

Publication number: CN218717426U
Application number: CN202222806875.3U
Authority: CN
Inventors: 陈加强; 刘榕; 吴金梁
Original assignee: Guangdong Meixi Technology Co ltd
Current assignee: Guangdong Meixi Technology Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-03-24
Anticipated expiration: 2032-10-24

Abstract

The utility model relates to an oral care technical field provides a water pump device and oral care equipment. The water pump device comprises a pump body assembly, a plug body and a connecting rod, wherein a pump cavity is formed in the pump body assembly, the plug body is movably arranged in the pump cavity, and the plug body is in sealing fit with the inner wall of the pump cavity; the connecting rod is arranged outside the pump cavity and is integrally formed with the plug body. According to the water pump device provided by the embodiment of the utility model, the connecting rod and the plug body are integrally formed, the connecting rod can directly drive the plug body to reciprocate in the pump cavity, the connecting part of the connecting rod and the plug body can not generate noise in the movement process, and can not cause energy loss, thereby effectively avoiding the problems of energy loss and noise increase caused by a crankshaft connecting rod mechanism in the water pump transmission process in the related technology; meanwhile, the structure of the water pump device can be simplified due to the integrated arrangement, the assembly difficulty of the water pump device is reduced, and the production cost is reduced.

Description

Water pump device and oral care equipment

Technical Field

The utility model relates to an oral care technical field especially relates to a water pumping plant and oral care equipment.

Background

Most oral care devices use a water pump to generate high pressure and pulse water flow to flush the oral cavity, so as to remove the tiny food residues and harmful bacteria adhered to the teeth or gums. The pulse water pump of the tooth flusher in the related technology is mainly divided into a piston type water pump and a diaphragm water pump. The two water pumps pump water through the change of the cavity volume of the pump body, thereby achieving the purpose of pulse type water supply. The piston of the piston type water pump is mainly divided into two types, one type is a plastic piston, and the other type is a plastic piston which are driven by a motor to move. Because the motor is in rotary motion, the motor is usually required to be provided with a crankshaft connecting rod to be matched with the piston in order to realize the reciprocating motion of the piston in the water pump. In the related art, backlash noise and energy loss are caused due to a problem of fitting accuracy of a crankshaft connecting rod and a piston.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a water pump device has effectively avoided the water pump transmission in-process because bent axle link mechanism leads to loss and the noise increase of energy.

The utility model discloses still provide an oral care equipment.

According to the utility model discloses water pump unit of first aspect embodiment, include:

a pump body assembly having a pump chamber formed therein;

the plug body is movably arranged in the pump cavity and is in sealing fit with the inner wall of the pump cavity;

and the connecting rod is arranged outside the pump cavity and is integrally formed with the plug body.

According to the water pump device provided by the embodiment of the utility model, the connecting rod and the plug body are integrally formed, the connecting rod can directly drive the plug body to reciprocate in the pump cavity, the connecting part of the connecting rod and the plug body can not generate noise in the movement process, and can not cause energy loss, thereby effectively avoiding the problems of energy loss and noise increase caused by a crankshaft connecting rod mechanism in the water pump transmission process in the related technology; meanwhile, the structure of the water pump device can be simplified due to the integrated arrangement, the assembly difficulty of the water pump device is reduced, and the production cost is reduced.

According to the utility model discloses an embodiment, pump body subassembly includes:

the pump body is positioned inside the pump body, and a first opening communicated with the pump cavity is formed at the first end of the pump body;

and the sealing element covers the first opening, a through hole is formed in the sealing element, the connecting rod penetrates through the through hole, and the sealing element is in sealing fit with the connecting rod and the pump body main body.

According to the utility model discloses an embodiment, the material of sealing member is elastic material, the sealing member respectively with pump body main part and the connection can be dismantled to the connecting rod.

According to an embodiment of the present invention, the pump body main body is provided with a first groove, the sealing member is provided with a first convex edge, and the first convex edge is embedded in the first groove; the periphery of connecting rod is provided with the second recess, first open-ended border is provided with the protruding stupefied of second, the protruding stupefied of second is located in the second recess.

According to the utility model discloses an embodiment still includes:

the transmission gear is provided with a central shaft and an eccentric shaft sleeve, the eccentric shaft sleeve is sleeved on the periphery of the central shaft, and the axis of the eccentric shaft sleeve is not coincident with the axis of the central shaft; the connecting rod is kept away from the one end of cock body is provided with the spacing collar, the spacing collar orientation one side of drive gear is formed with the second opening, the spacing collar is kept away from one side of drive gear is formed with the guide way, the spacing collar cover is located the periphery of eccentric shaft cover, center pin movably insert locate in the guide way.

According to the utility model discloses an embodiment, the width of guide way is 2.1mm-2.2mm, the length of guide way is 3.3mm-3.8mm, the width of guide way with the ratio of the external diameter of center pin is 1.05-1.1.

According to the utility model discloses an embodiment still includes:

the sealing plug is detachably connected with the plug body, and the plug body is in sealing fit with the inner wall of the pump cavity through the sealing plug.

According to an embodiment of the present invention, a T-shaped buckle is disposed at one end of the plug body away from the connecting rod, and a mounting hole is disposed at one side of the sealing plug facing the plug body; or a mounting hole is formed in one end, far away from the connecting rod, of the plug body, and a T-shaped buckle is arranged on one side, facing the plug body, of the sealing plug;

the T-shaped buckle is embedded in the mounting hole.

According to an embodiment of the present invention, the clearance of the interference fit between the plug body and the inner wall of the pump cavity is 0.15mm to 0.2mm.

According to the utility model discloses oral care equipment of second aspect embodiment, including casing, shower nozzle and as above arbitrary one water pumping plant, water pumping plant set up in the casing, the shower nozzle with the casing is connected, the shower nozzle with water pumping plant's liquid outlet intercommunication.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

Furthermore, by using the water pump device, the noise of the oral care equipment in the using process is effectively reduced, the production cost is reduced, and the product competitiveness is enhanced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view illustrating an assembly relationship between a water pump device and a nozzle according to an embodiment of the present invention;

fig. 2 is a schematic front view of a water pump device according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic perspective view of a connecting rod according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a transmission gear according to an embodiment of the present invention;

fig. 6 is an exploded schematic view of the plug body, the connecting rod and the sealing plug according to the embodiment of the present invention;

reference numerals:

10. a plug body; 11. a seal member; 12. t-shaped buckles; 13. an annular projection; 14. a sealing plug; 20. a connecting rod; 21. a central shaft; 22. an eccentric shaft sleeve; 23. a guide groove; 24. a limiting ring; 30. a pump body assembly; 31. a pump body; 32. a pump chamber; 33. a liquid inlet; 34. a first groove; 35. a first ridge; 36. a second ridge; 37. a second groove; 40. a transmission gear; 50. and (4) a spray head.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Fig. 1 illustrates an assembly relationship diagram ofbase:Sub>A water pump device andbase:Sub>A nozzle provided in an embodiment of the present invention, fig. 2 illustratesbase:Sub>A front view structure diagram of the water pump device provided in an embodiment of the present invention, and fig. 3 isbase:Sub>A sectional structure diagram alongbase:Sub>A section linebase:Sub>A-base:Sub>A in fig. 2; as shown in fig. 1, 2 and 3, the water pump device comprises a pump body assembly 30, a plug 10 and a connecting rod 20, wherein a pump cavity 32 is formed inside the pump body assembly 30, the plug 10 is movably arranged in the pump cavity 32, and the plug 10 is in sealing fit with the inner wall of the pump cavity 32. The connecting rod 20 is disposed outside the pump chamber 32, and the connecting rod 20 is integrally formed with the stopper body 10.

According to the water pump device provided by the embodiment of the utility model, the connecting rod 20 and the plug body 10 are integrally formed, the connecting rod 20 can directly drive the plug body 10 to reciprocate in the pump cavity 32, the connecting part of the connecting rod 20 and the plug body 10 can not generate noise in the movement process, and can not cause energy loss, thereby effectively avoiding the problems of energy loss and noise increase caused by a crankshaft connecting rod mechanism in the water pump transmission process in the related technology; meanwhile, the structure of the water pump device can be simplified due to the integrated arrangement, the assembly difficulty of the water pump device is reduced, and the production cost is reduced.

It will be appreciated that, as shown in fig. 3, the pump body assembly 30 includes a pump body 31 and a sealing member 11, the pump cavity 32 is located inside the pump body 31, the pump cavity 32 extends along the length of the pump body 31, and the plug body 10 reciprocates along the length of the pump cavity 32 to compress the liquid in the pump cavity 32 and increase the flow rate of the liquid flowing out of the outlet of the water pump device. The first end of the pump body 31 is formed with a first opening communicating with the pump chamber 32.

The sealing piece 11 covers the first opening, and the sealing piece 11 is suitable for plugging the first opening to play a role in sealing and prevent the water pump device from leaking water. The sealing member 11 is formed with a through hole, the connecting rod 20 is inserted into the through hole, and the sealing member 11 is in sealing fit with the connecting rod 20 and the pump body 31. The sealing member 11 and the pump body 31 may be connected by interference fit, or by gluing or screwing. Similarly, the sealing member 11 and the connecting rod 20 may be connected by interference fit, or may be fixed by gluing or screwing.

It can be understood that, as shown in fig. 3, the sealing member 11 is in a bowl-shaped structure, and a mounting opening is formed on a side of the sealing member 11 facing the pump body 31, and the mounting opening is a circular opening, and the specific shape of the mounting opening is matched with the shape of the cross section of the pump body 31, that is, when the cross section of the pump body 31 is circular, the mounting opening is a circular opening. The through hole is provided on the side of the seal member 11 away from the pump body 31, and the through hole is also a circular opening, and the diameter of the through hole is smaller than that of the mounting opening.

It will also be appreciated that, as shown in fig. 3, the side wall of the pump body 31 is provided with a liquid inlet port 33, the liquid inlet port 33 communicating with the liquid inlet pipe and the pump chamber 32. The second end of pump body main part 31 is provided with the liquid outlet, and the liquid outlet is provided with the check valve, and inlet 33 is located the middle part of pump body main part 31.

In order to facilitate connection with the nozzle 50, as shown in fig. 3, the liquid outlet is further provided with a connecting member, and a flow passage is formed inside the connecting member and is communicated with the liquid outlet port of the check valve. The first end of connecting piece is formed with connecting portion, and connecting portion inlays locates the liquid outlet.

In order to improve the sealing performance between the connecting piece and the pump body main body 31, the outer peripheral surface of the connecting portion is provided with a first annular groove, a first sealing ring is embedded in the first annular groove, and the first sealing ring is used for sealing a gap between the connecting piece and the pump body main body 31. The second end of the connector is formed with a socket that communicates with the flow passage, and the socket is provided to facilitate quick connection of the nozzle 50 to the connector. The inner wall of the socket is provided with a second annular groove, a second sealing ring is embedded in the second annular groove, and the second sealing ring is suitable for being matched with the spray head 50 in a sealing mode.

It will also be appreciated that the seal 11 is removably associated with the pump body 31 and the connecting rod 20, respectively. Since the seal member 11 is a wearing part, the seal member 11 is detachably connected to the pump body 31 and the link 20, respectively, in order to facilitate maintenance of the water pump apparatus. When the water pump apparatus is to be serviced, the seal member 11 can be replaced by separating the seal member 11 from the pump body 31.

It can be understood that, as shown in fig. 3, the sealing element 11 is made of an elastic material, and during the movement of the connecting rod 20, the connecting rod 20 can drive the sealing element 11 to deform, so as to change the volume of the pump cavity 32, thereby achieving the purpose of pumping water by the water pump. Because the sealing member 11 has certain elasticity, even if part of the sealing member 11 deforms, the sealing performance between the sealing member 11 and the pump body 31 and between the sealing member 11 and the connecting rod 20 cannot be influenced, the water leakage of the pump body 31 is avoided, the movement electronic components of the oral care equipment are prevented from being damaged, and the service life of the oral care equipment is prolonged.

It can be understood that, as shown in fig. 3, the outer peripheral surface of the pump body 31 near one end of the sealing member 11 is provided with a first groove 34, the sealing member 11 is provided with a first flange 35, the first flange 35 is located at the edge of the mounting opening, and the first flange 35 is embedded in the first groove 34. The assembly mode that the first protruding edge 35 is embedded in the first groove 34 is adopted, so that connection between the sealing element 11 and the pump body main body 31 is realized, and sealing between the sealing element 11 and the pump body main body 31 is also realized. Of course, in order to further improve the sealing performance, an adhesive may be disposed in the first groove 34 to adhere the first protrusion 35 to the first groove 34.

The outer periphery of the connecting rod 20 is provided with a second groove 37, and the side wall of the second groove 37 is formed with a limiting groove which is communicated with the second groove 37. The border of through-hole is provided with second protruding stupefied 36, and the both sides of second protruding stupefied 36 are formed with spacing portion, and two spacing portions are around second protruding stupefied 36 symmetrical arrangement, and second protruding stupefied 36 inlays and locates in second recess 37, and two spacing portion inlays and locates corresponding spacing inslot.

It should be understood that the assembling relationship between the seal member 11 and the pump body 31 and the connecting rod 20 is not limited to this, and a first protruding edge 35 may be provided on the outer peripheral surface of the pump body 31 near one end of the seal member 11, a first groove 34 may be provided on the edge of the mounting opening, and the first protruding edge 35 may be embedded in the first groove 34. Similarly, the second protrusion 36 is disposed on the outer periphery of the connecting rod 20, the second groove 37 is disposed on the edge of the through hole, and the second protrusion 36 is embedded in the second groove 37.

It should be noted here that the first protruding edge 35 or the first groove 34 may be provided not only on the outer peripheral surface of the pump body 31 near the end of the sealing member 11, but also on the inner peripheral surface of the pump body 31 near the end of the sealing member 11, that is, on the inner wall of the pump chamber 32.

It can be understood that fig. 4 illustrates a schematic perspective view of a connecting rod provided by an embodiment of the present invention, and fig. 5 illustrates a schematic perspective view of a transmission gear provided by an embodiment of the present invention; as shown in fig. 4 and 5, the water pump device further includes a transmission gear 40, the transmission gear 40 is adapted to be engaged with a driving gear connected to a rotating shaft of a driving motor to transmit a driving force of the motor to the plug body 10. The transmission gear 40 is provided with a central shaft 21 and an eccentric shaft sleeve 22, the transmission gear 40 is a straight bevel gear, and the axis of the central shaft 21 and the axis of the transmission gear 40 are in the same straight line. The axis of the central shaft 21 is perpendicular to the direction of movement of the plug body 10. As shown in fig. 3, the pump body 31 is disposed vertically, and the center shaft 21 is disposed horizontally.

The eccentric sleeve 22 is sleeved on the periphery of the central shaft 21, the eccentric sleeve 22 is a circular tube, and the axis of the eccentric sleeve 22 is not overlapped with the axis of the central shaft 21. When the center shaft 21 rotates, the transmission gear 40 rotates around the center shaft 21. One end of the connecting rod 20, which is far away from the plug body 10, is provided with a limiting ring 24, the limiting ring 24 and the connecting rod 20 are integrally formed, the limiting ring 24 is in an oval shape, one side of the limiting ring 24, which faces the transmission gear 40, is formed with a second opening, and the eccentric shaft sleeve 22 is inserted into the limiting ring 24 through the second opening, so that the limiting ring 24 is sleeved on the periphery of the eccentric shaft sleeve 22. A guide groove 23 is formed on one side of the stop collar 24 away from the transmission gear 40, the guide groove 23 extends along the length direction of the pump body main body 31, and the central shaft 21 is movably inserted in the guide groove 23. For convenience of manufacture, the eccentric sleeve 22 is integrally formed with the center shaft 21.

It can be understood that fig. 6 illustrates an explosion structure diagram of the plug body, the connecting rod and the sealing plug provided by the embodiment of the present invention, as shown in fig. 6, the width of the guide groove 23 is 2.1mm-2.2mm, the length L of the guide groove 23 is 3.3mm-3.8mm, the ratio of the width of the guide groove 23 to the outer diameter of the central shaft 21 is 1.05-1.1, preferably 1.1, so as to ensure a large gap between the guide groove 23 and the central shaft 21, so as to avoid the occurrence of the seizing phenomenon of the connecting rod 20 during the rotation of the transmission gear 40. The length L of the guide groove 23 determines the moving stroke of the plug body 10, and the moving stroke of the plug body 10 and the cross section S of the pump cavity 32 determine the water discharging capacity of the water pump, namely the water discharging amount of the water pump. The size of L S in the embodiment is 26-30.5, and the patent prefers 30.5.

When the transmission gear 40 rotates, the transmission gear 40 drives the connecting rod 20 to move through the eccentric shaft sleeve 22, and due to the matching of the guide groove 23 and the central shaft 21, the plug body 10 can be ensured to do linear motion in the pump cavity 32, the plug body 10 is ensured not to be influenced by lateral force in the motion process, the plug body 10 and the connecting rod 20 are ensured not to rub against the side wall of the pump cavity 32, the service life of the water pump device is prolonged, and the power and the working noise of the water pump device are further reduced.

It can be understood that, as shown in fig. 6, the plug body 10 is in interference fit with the inner wall of the pump cavity 32, the plug body 10 may be a cylinder, the clearance C of the interference fit between the plug body 10 and the inner wall of the pump cavity 32 is 0.15mm to 0.2mm, preferably 0.2mm, and a larger clearance can ensure that the plug body 10 is tightly attached to the inner wall of the pump cavity 32, so as to prolong the service life of the water pump device, and prevent the water pump device from leaking water due to the fact that the plug body 10 is worn after long-term use. As shown in fig. 3, of course, the plug body 10 may also be in a truncated cone shape, that is, the outer diameter of the end of the plug body 10 close to the connecting rod 20 is smaller than the outer diameter of the end of the plug body 10 far from the connecting rod 20; at this time, the end of the stopper body 10 remote from the rod 20 is in interference fit with the inner wall of the pump chamber 32.

The water pump device further comprises a sealing plug 14, the sealing plug 14 is detachably connected with the plug body 10, and the plug body 10 is in sealing fit with the inner wall of the pump cavity 32 through the sealing plug 14. Since the plug body 10 is in sealing engagement with the inner wall of the pump chamber 32 through the sealing plug 14, the plug body 10 does not contact the inner wall of the pump chamber 32, and only the sealing plug 14 contacts the inner wall of the pump chamber 32, so that even after a long period of use, only the sealing plug 14 is worn, and the plug body 10 is not worn. And because the sealing plug 14 is detachably connected with the plug body 10, only the damaged sealing plug 14 needs to be replaced, and the use cost of the water pump device is effectively reduced.

It can be understood that, as shown in fig. 6, the end of the plug body 10 away from the connecting rod 20 is provided with a T-shaped buckle 12, one side of the sealing plug 14 facing the plug body 10 is provided with a mounting hole, the maximum inner diameter of the mounting hole is smaller than the maximum outer diameter of the T-shaped buckle 12, and the T-shaped buckle 12 is embedded in the mounting hole. The sealing plug 14 is fixed by matching the T-shaped buckle 12 with the mounting hole, so that the sealing plug 14 is convenient to mount, and the stability of the sealing plug 14 can be improved.

It should also be understood that the assembly relationship between the plug body 10 and the sealing plug 14 is not limited to the above manner, and an installation hole may be provided at an end of the plug body 10 away from the connecting rod 20, a T-shaped buckle 12 may be provided at a side of the sealing plug 14 facing the plug body 10, and the sealing plug 14 and the plug body 10 may be assembled by fitting the T-shaped buckle 12 into the installation hole.

It will also be appreciated that the sealing plug 14 is cylindrical and that the outer diameter of the sealing plug 14 may be the same as the outer diameter of the plug body 10 or may be greater than the outer diameter of the plug body 10. The outer peripheral surface of the sealing plug 14 at the end away from the plug body 10 is provided with an annular protrusion 13, and the sealing plug 14 is in sealing fit with the inner wall of the pump chamber 32 through the annular protrusion 13.

Referring to fig. 1 to 6, an embodiment of the present invention will be described, and as shown in fig. 1 to 6, the water pump device includes a pump body assembly 30, a plug body 10, a connecting rod 20, a transmission gear 40 and a sealing plug 14. The pump body assembly 30 comprises a pump body main body 31 and a sealing member 11, the pump body main body 31 is a cylinder, a pump cavity 32 is formed inside the pump body main body 31, the pump cavity 32 extends along the length direction of the pump body main body 31, the plug body 10 is movably arranged in the pump cavity 32, and the plug body 10 reciprocates along the length direction of the pump cavity 32. The first end of the pump body 31 is formed with a first opening communicating with the pump chamber 32. The sealing member 11 covers the first opening, and the sealing member 11 is suitable for sealing off the first opening. The sealing member 11 is formed with a through hole, the connecting rod 20 is inserted into the through hole, and the sealing member 11 is in sealing fit with the connecting rod 20 and the pump body 31. The connecting rod 20 is disposed outside the pump chamber 32, and the connecting rod 20 is integrally formed with the stopper body 10.

The sealing member 11 is a bowl-shaped structure, and a mounting opening is formed on one side of the sealing member 11 facing the pump body 31, and the mounting opening is a circular opening. The through-hole sets up in the one side that sealing member 11 deviates from pump body 31, and the through-hole also is circular mouth, and the diameter of through-hole is less than the diameter of installing port. The sealing element 11 is made of an elastic material, and in the movement process of the connecting rod 20, the connecting rod 20 can drive the sealing element 11 to deform, so that the volume of the pump cavity 32 is changed, and the purpose of pumping water by the water pump is achieved. Because the sealing member 11 has certain elasticity, even if part of the sealing member 11 deforms, the sealing performance between the sealing member 11 and the pump body 31 and between the sealing member 11 and the connecting rod 20 cannot be influenced, the water leakage of the pump body 31 is avoided, the movement electronic components of the oral care equipment are prevented from being damaged, and the service life of the oral care equipment is prolonged.

The outer peripheral face of the pump body 31 close to one end of the sealing element 11 is provided with a first groove 34, the first groove 34 is an annular groove, a first protruding edge 35 is arranged at the edge of the mounting opening, and the first protruding edge 35 is embedded in the first groove 34. The periphery of connecting rod 20 is provided with second recess 37, and second recess 37 is the annular groove, and the lateral wall of second recess 37 forms the spacing groove, and the spacing groove communicates with second recess 37. The border of through-hole is provided with second protruding stupefied 36, and the both sides of first protruding stupefied 35 are formed with spacing portion, and two spacing portions are around second protruding stupefied 36 symmetrical arrangement, and second protruding stupefied 36 inlays locates in second recess 37, and two spacing portion inlays locates corresponding spacing inslot.

The transmission gear 40 is a straight bevel gear, the transmission gear 40 is suitable for being meshed with a driving gear, the transmission gear 40 is provided with a central shaft 21 and an eccentric shaft sleeve 22, and the axis of the central shaft 21 is collinear with the axis of the transmission gear 40. The axis of the central shaft 21 is perpendicular to the direction of movement of the plug body 10. The eccentric shaft sleeve 22 is sleeved on the periphery of the central shaft 21, the eccentric shaft sleeve 22 is cylindrical, and the axis of the eccentric shaft sleeve 22 is not coincident with the axis of the central shaft 21. One end of the connecting rod 20, which is far away from the plug body 10, is provided with a limiting ring 24, the limiting ring 24 and the connecting rod 20 are integrally formed, the limiting ring 24 is oval, a second opening is formed on one side of the limiting ring 24, which is close to the transmission gear 40, and the limiting ring 24 is sleeved on the periphery of the eccentric shaft sleeve 22. A guide groove 23 is formed on one side of the limiting ring 24 away from the transmission gear 40, the guide groove 23 extends along the length direction of the pump body 31, and the central shaft 21 is movably inserted in the guide groove 23. The width D of the guide groove 23 is 2.1mm-2.2mm, the length L of the guide groove 23 is 3.3mm-3.8mm, and the ratio of the width of the guide groove 23 to the outer diameter of the central shaft 21 is 1.1.

The sealing plug 14 is located at one end of the plug body 10 far away from the connecting rod 20, a T-shaped buckle 12 is arranged at one end of the plug body 10 far away from the connecting rod 20, a mounting hole is formed in one side, facing the plug body 10, of the sealing plug 14, the maximum inner diameter of the mounting hole is smaller than the maximum outer diameter of the T-shaped buckle 12, and the T-shaped buckle 12 is embedded in the mounting hole. The sealing plug 14 is cylindrical, and the outer diameter of the sealing plug 14 is the same as that of the plug body 10. The outer peripheral surface of the sealing plug 14 at the end away from the plug body 10 is provided with an annular protrusion 13, and the sealing plug 14 is in sealing fit with the inner wall of the pump chamber 32 through the annular protrusion 13.

As shown in fig. 1, the utility model also provides an oral care device, which comprises a casing (not shown), a nozzle 50 and a water pump device as described in any of the above embodiments, wherein the water pump device is arranged in the casing, the nozzle 50 is connected with the casing, and the nozzle 50 is communicated with the liquid outlet of the water pump device.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A water pumping apparatus, comprising:

a pump body assembly having a pump chamber formed therein;

2. The water pump apparatus as claimed in claim 1, wherein the pump body assembly comprises:

and the sealing element covers the first opening, a through hole is formed in the sealing element, the connecting rod penetrates through the through hole, and the sealing element is in sealing fit with the connecting rod and the pump body.

3. The water pump device according to claim 2, wherein the sealing member is made of an elastic material, and the sealing member is detachably connected to the pump body and the connecting rod, respectively.

4. The water pump device according to claim 2 or 3, wherein the pump body main body is provided with a first groove, the sealing member is provided with a first protruding ridge, and the first protruding ridge is embedded in the first groove; the periphery of connecting rod is provided with the second recess, the border of first opening is provided with the protruding stupefied of second, the protruding stupefied of second is inlayed and is located in the second recess.

5. The water pump apparatus as claimed in any one of claims 1 to 3, further comprising:

6. The water pump apparatus as claimed in claim 5, wherein the width of the guide groove is 2.1mm to 2.2mm, the length of the guide groove is 3.3mm to 3.8mm, and the ratio of the width of the guide groove to the outer diameter of the central shaft is 1.05 to 1.1.

7. The water pump apparatus as claimed in any one of claims 1 to 3, further comprising:

8. The water pump device as claimed in claim 7, wherein a T-shaped buckle is arranged at one end of the plug body away from the connecting rod, and a mounting hole is arranged at one side of the sealing plug facing the plug body; or a mounting hole is formed in one end, far away from the connecting rod, of the plug body, and a T-shaped buckle is arranged on one side, facing the plug body, of the sealing plug;

the T-shaped buckle is embedded in the mounting hole.

9. The water pump device according to any one of claims 1 to 3, wherein the clearance of the interference fit between the plug body and the inner wall of the pump cavity is 0.15mm-0.2mm.

10. An oral care device, comprising a housing, a spray head and the water pump device of any one of claims 1 to 9, wherein the water pump device is disposed in the housing, the spray head is connected to the housing, and the spray head is communicated with a liquid outlet of the water pump device.