Water pumping device and water pick

Abstract

The utility model belongs to the technical field of oral cavity cleaning, and particularly relates to a water pumping device and a water pick. The water pumping device comprises a driving part, a cam, a piston part and a pump body, the cam is connected to the output end of the driving part, the pump body comprises a piston cavity, one end of the piston part is in sliding connection with the cam, and the other end of the piston part is in sliding connection with a cavity arm of the piston cavity. The driving piece is used for driving the cam to rotate around a first axis, and the cam is used for driving the piston piece to reciprocate in the first direction. The utility model can solve the problem of how to realize the miniaturization of the structure of the oral irrigator.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral cleaning, and particularly relates to a water pump device and a water flosser. Background Art

[0002] The water flosser is an auxiliary tool for the toothbrush, which can clean the places that are difficult to clean with a toothbrush, such as the gaps between teeth and the gingival sulcus. The water flosser is equipped with a water pump and a water tank, and the water pump can pump water from the water tank to flush the teeth. At present, the piston of the water flosser pump body is generally driven by a gear pair connecting rod. The driving motor drives the active gear to rotate, and the driven gear drives the connecting rod. The connecting rod drives the piston assembled on it to reciprocate in the pump body to realize the working process of the pump body absorbing and spraying water. However, the gear pair transmission component has high manufacturing precision, high parts cost, high transmission noise, and is easy to wear during work, which affects the service life of the product; not only that, the gear pair transmission component will cause the pump body component to be larger in size, which is not conducive to miniaturization and cannot adapt to the development direction of more compact and portable products. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a water pump device, aiming to solve the problem of how to simplify the structure of the water flosser to achieve miniaturization.

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] In a first aspect, a water pumping device is provided, comprising a driving member, a cam, a piston member, and a pump body, wherein the cam is connected to the output end of the driving member, the pump body comprises a piston chamber, one end of the piston member is slidably connected to the cam, and the other end of the piston member is slidably connected to a chamber arm of the piston chamber, the driving member is used to drive the cam to rotate around a first axis, and the cam is used to drive the piston member to reciprocate along a first direction.

[0006] In some embodiments, the cam includes a main body and a drive groove circumferentially arranged on the outer circumferential surface of the main body, the drive groove is provided with a first contact end away from the piston cavity and a second contact end close to the piston cavity along the first axis direction, the piston member includes a mating portion slidably connected to the drive groove, the drive groove is used to drive the mating portion to reciprocate between the first contact end and the second contact end to drive the piston member to reciprocate along a first direction, and the first direction is parallel to or coincides with the direction of the first axis.

[0007] In some embodiments, the cam includes a first abutment portion and a second abutment portion which are arranged around the circumference of the main body, the first abutment portion and the second abutment portion are arranged at intervals along the first axial direction, the first abutment portion has a first curved surface connected to the outer peripheral surface of the main body, the second abutment portion has a second curved surface connected to the outer peripheral surface of the main body, the first curved surface and the second curved surface are opposite to each other, and the first curved surface, the second curved surface and the outer peripheral surface of the main body together form the driving groove.

[0008] In some embodiments, the cam includes a first abutment portion arranged along the circumference of the main body, the first abutment portion has a first curved surface connected to the outer peripheral surface of the main body, the first curved surface and the outer peripheral surface of the main body form the driving groove, and the piston member is connected to a reset member for driving the mating portion to move from the second contact end to the first contact end.

[0009] In some embodiments, the cam is a disc-shaped structure, the cam has a radial dimension that changes along the rotation direction of the cam, one end of the piston is slidably connected to the outer circumference of the cam, and the first direction is perpendicular to the direction of the first axis.

[0010] In some embodiments, the piston member includes a piston head and a connecting member, one end of the connecting member is slidably connected to the cam, and the other end of the connecting member is connected to the piston head, and the piston head is slidably connected to the cavity arm of the piston cavity.

[0011] In some embodiments, the connecting member includes a connecting main rod and the matching portion, and the matching portion is connected to an end of the connecting main rod away from the piston head.

[0012] In some embodiments, the connecting member further includes a blocking portion connected between the connecting main rod and the matching portion, and a reinforcing rib is connected between the blocking portion and the connecting main rod.

[0013] In some embodiments, the connecting member also includes a connecting portion connected to the connecting main rod and facing one end of the piston head. A snap-fit ​​groove is provided at one end of the piston head facing the connecting portion, and the connecting portion extends into the snap-fit ​​groove and snap-fits with the snap-fit ​​groove.

[0014] In a second aspect, a water flosser is provided, which includes the water pumping device mentioned above.

[0015] The present application directly drives the cam to rotate around the first axis through a driving member, and one end of the piston member is slidably connected to the cam. The rotation of the cam can drive the piston member to reciprocate along the first direction, and the piston member reciprocates along the first direction in the piston chamber of the pump body to realize the working process of water suction and water spraying of the pump body. The water pumping device of the present application has low transmission noise and low precision requirements, which can reduce costs and has fewer assembly parts, making assembly simpler and more reliable, which is conducive to miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of the overall structure of the water pumping device provided in an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the split structure of the water pump device provided in the embodiment of the present application;

[0019] Figure 3 is a schematic structural diagram of a cam and a connecting member provided in an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the structure of a cam provided in an embodiment of the present application;

[0021] Figure 5 It is a schematic diagram of the partial cross-section structure of the water pumping device provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 10. Pump body; 11. First cavity; 12. Second cavity; 13. Water outlet; 14. Water inlet; 20. Cam; 21. Main body; 22. Driving groove; 221. First contact end; 222. Second contact end; 23. First abutting portion; 231. First curved surface; 24. Second abutting portion; 241. Second curved surface; 30. Driving member; 40. Piston head; 41. Clamping groove; 50. Connecting member; 51. Fitting portion; 52. Connecting portion; 53. Connecting main rod; 54. Reinforcing rib; 55. Retaining portion; 60. Outer shell; 61. First shell; 62. Second shell. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] See also Figures 1 to 5The embodiment of the present application provides a water pumping device, which includes a driving member 30, a cam 20, a piston member, and a pump body 10. The cam 20 is connected to the output end of the driving member 30. The driving member 30 may include a driving shaft. The cam 20 is rotatably connected to the driving shaft. The pump body 10 includes a piston chamber. One end of the piston member is slidably connected to the cam 20, and the other end of the piston member is slidably connected to the chamber arm of the piston chamber. The driving member 30 is used to drive the cam 20 to rotate around a first axis, and the cam 20 is used to drive the piston member to reciprocate along a first direction X, so as to drive the piston member to reciprocate along the first direction X in the piston chamber.

[0029] The present application directly drives the cam 20 to rotate around the first axis through the driving member 30, and one end of the piston member is slidably connected to the cam 20. The rotation of the cam 20 can drive the piston member to reciprocate along the first direction X. The piston member reciprocates in the piston cavity of the pump body 10 along the first direction X. The reciprocating movement of the piston member in the piston cavity changes the pressure in the cavity of the pump body 10, thereby realizing the working process of water suction and water spraying of the pump body 10. The water pumping device of the present application has low transmission noise and low precision requirements, which can reduce costs, and has fewer assembly parts, making assembly simpler and more reliable, which is conducive to miniaturization.

[0030] Specifically, Figure 5 As shown, a water outlet 13 is formed at the top of the pump body 10, and a nozzle can be provided at the water outlet 13 of the pump body 10, and the nozzle is connected with the water outlet 13. The pump body 10 is also formed with a water inlet 14, and the water inlet 14 can be provided on the side or bottom of the pump body 10, and the water inlet 14 is used to communicate with the corresponding water container. The water inlet 14 and the water outlet 13 are both connected with the piston cavity. When the piston member reciprocates in the piston cavity of the pump body 10 along the first direction X, the water pumping and pumping functions are realized. For example, when the piston member moves toward the direction close to the cam 20, a negative pressure is formed in the piston cavity, and the water in the water container can be pumped into the pump body 10 through the water inlet 14; and when the piston member moves toward the direction away from the cam 20, a high pressure is formed in the piston cavity, and the water in the piston cavity can be pumped out. The pumped water is sprayed out through the water outlet 13 and the nozzle, so as to form a water flow with a certain pressure, so as to realize the flushing of teeth, gums and tooth gaps.

[0031] Preferably, if Figure 3 and Figure 4As shown, the cam 20 includes a main body 21 and a driving groove 22 circumferentially arranged on the outer peripheral surface of the main body 21, the driving groove 22 is provided with a first contact end 221 away from the piston cavity and a second contact end 222 close to the piston cavity along the first axial direction, the piston member includes a matching portion 51 slidably connected to the driving groove 22, the driving groove 22 is used to drive the matching portion 51 to reciprocate between the first contact end 221 and the second contact end 222 to drive the piston member to reciprocate along the first direction X, and the first direction X of the movement of the piston member is parallel to or coincides with the driving axis direction of the driving member 30, so the driving member 30 can be arranged in the same direction as the connecting member 50, and the driving member 30 will not occupy too much height space, which helps to make the structure of the water flosser more compact and miniaturized.

[0032] When the cam 20 rotates around the first axis, the main body 21 rotates, and the driving groove 22 on the outer peripheral surface of the main body 21 also rotates. When the matching portion 51 is located at the second contact end 222 of the driving groove 22, the driving groove 22 continues to rotate, and the matching portion 51 affected by the driving groove 22 will move in the direction away from the piston cavity, and drive the piston member to move in the direction away from the piston cavity; when the matching portion 51 is located at the first contact end 221 of the driving groove 22, the driving groove 22 continues to rotate, and the matching portion 51 affected by the driving groove 22 will move in the direction close to the piston cavity, and drive the piston member to move in the direction close to the piston cavity. In this way, as the cam 20 continues to rotate, the matching portion 51 can move back and forth between the first contact end 221 and the second contact end 222, so that the piston member can move back and forth.

[0033] Further, the cam 20 further includes a first abutting portion 23 and a second abutting portion 24 disposed around the circumference of the main body 21, the first abutting portion 23 and the second abutting portion 24 are disposed at intervals along the first axial direction, the first abutting portion 23 has a first curved surface 231 adjacent to the circumferential surface connected to the main body 21, the second abutting portion 24 has a second curved surface 241 connected to the circumferential surface of the main body 21, the first curved surface 231 and the second curved surface 241 are directly opposite, and the first curved surface 231, the second curved surface 241 and the circumferential surface of the main body 21 are surrounded to form the driving groove 22. In this embodiment, the first curved surface 231 and the second curved surface 241 are continuous and smooth curved surfaces, and when the matching portion 51 slides in the driving groove 22, the first curved surface 231 and the second curved surface 241 can limit the matching portion 51 in different directions, so that the matching portion 51 always keeps moving along a straight line. In order to improve the sliding smoothness of the matching portion 51 , a rolling element, such as a roller or a ball, may be provided on the matching portion 51 , so as to reduce the sliding friction of the matching portion 51 .

[0034] In some embodiments, the cam 20 includes a first abutment portion 23 disposed around the circumference of the main body 21, the first abutment portion 23 has a first curved surface 231 connected to the outer peripheral surface of the main body 21, the first curved surface 231 and the outer peripheral surface of the main body 21 are surrounded to form a driving groove 22, and the piston member is connected to a reset member for driving the matching portion 51 to move from the second contact end 222 to the first contact end 221. When the matching portion 51 moves to the second contact end 222, under the action of the reset member, the matching portion 51 returns from the second contact end 222 to the first contact end 221, so that the piston member can continue to reciprocate without interruption. Specifically, the reset member of the present application is an elastic member, such as a spring or a tension spring.

[0035] In another possible implementation, the cam 20 is a disc-shaped structure, and the cam 20 has a radial dimension that changes along the rotation direction of the cam 20. One end of the piston member is slidably connected to the outer peripheral surface of the cam 20. When the cam 20 rotates, one end of the piston member is always in contact with the outer peripheral surface of the cam 20. As the distance between the contact point between the piston member and the outer peripheral surface of the cam 20 and the piston cavity changes, the piston member can move back and forth along a first direction, and at this time the first direction is perpendicular to the direction of the first axis.

[0036] In the present application, the piston member includes a piston head 40 and a connecting member 50. One end of the connecting member 50 is slidably connected to the cam 20, and the other end of the connecting member 50 is connected to the piston head 40. The piston head 40 is slidably connected to the cavity arm of the piston cavity. The piston head 40 can be detachably connected to the connecting member 50, or can be integrally formed with the connecting member 50.

[0037] In addition, the connecting member 50 includes a connecting main rod 53 and a matching portion 51, wherein the matching portion 51 is connected to an end of the connecting main rod 53 away from the piston head 40. Further, the connecting member 50 also includes a resisting portion 55 connected between the connecting main rod 53 and the matching portion 51, wherein the matching portion 51 can be connected to the side of the resisting portion 55, and the connecting main rod 53 can be connected to the end surface of the resisting portion 55 along the first direction, which is convenient for the matching portion 51 to extend to the cam 20 and be slidably connected to the cam, and can make the extending direction of the connecting main rod 53 coaxial with the first axis direction, so that the movement of the connecting main rod 53 is more stable and will not shake to both sides. A reinforcing rib 54 is connected between the resisting portion 55 and the connecting main rod 53, and the reinforcing rib 54 between the connecting main rod 53 and the resisting portion 55 can enhance the connection strength between the connecting main rod 53 and the resisting portion 55, thereby improving the structural strength of the connecting member 50. Optionally, both sides of the connecting main rod 53 are provided with reinforcing ribs 54, and the reinforcing ribs 54 are triangular pieces, so as to further enhance the connection strength between the connecting main rod 53 and the resisting portion 55.

[0038] In some embodiments, the connecting member 50 includes a connecting portion 52 connected to the main body 21 and facing one end of the piston head 40. A snap-fit ​​groove 41 is provided at one end of the piston head 40 facing the connecting portion 52. The connecting portion 52 extends into the snap-fit ​​groove 41 and snap-fits with the snap-fit ​​groove 41. The connecting structure is simple and convenient for disassembly and assembly.

[0039] In some embodiments, the piston cavity includes at least a first cavity 11 and a second cavity 12, the first cavity 11 is connected to the second cavity 12, the inner diameter of the first cavity 11 is larger than the inner diameter of the second cavity 12, the side wall of the piston head 40 is sealed and connected to the cavity wall of the second cavity 12, the piston head 40 at least partially corresponds to the first cavity 11, and there is a gap between the side wall of the piston head 40 and the cavity wall of the first cavity 11. The inner diameter of the second cavity 12 is small, and when the piston head 40 slides in the second cavity 12, the sealing of the piston head 40 with the pump body 10 can be ensured during the reciprocating movement to prevent pressure leakage. Specifically, the piston head 40 of the present application is cylindrical, and the second cavity 12 is also a cylindrical cavity, so the contact between the piston head 40 and the second cavity 12 can be closer. There is a gap between the side wall of the piston head 40 and the cavity wall of the first cavity 11, which can prevent the piston head 40 from sliding and rubbing against the cavity wall of the first cavity 11 during the sliding process, thereby reducing the contact area between the piston cavity and the piston head 40, thereby reducing the friction resistance during the reciprocating movement of the piston head 40. The reduction in friction resistance can also reduce the load of the driving member 30, thereby reducing the power consumption of the driving member 30 and increasing the service life of the driving member 30.

[0040] In some embodiments, the water pump structure also includes a shell 60 having an installation cavity, the installation cavity is used to accommodate the driving member 30, the cam 20, the piston member and the pump body 10, the pump body 10 and the driving member 30 extend out of the shell 60, the shell 60 includes a first shell 61 and a second shell 62, the first shell 61 and the second shell 62 together form the installation cavity, the first shell 61 and the second shell 62 can be connected by fasteners such as screws, and can also be fastened by snap-fitting parts or bonded by adhesives.

[0041] To summarize, the present application directly drives the cam 20 to rotate around the first axis through the driving member 30, and one end of the piston member is slidably connected to the cam 20. The rotation of the cam 20 can drive the piston member to reciprocate along the first direction X. The piston member reciprocates in the piston cavity of the pump body 10 along the first direction X. The reciprocating movement of the piston member in the piston cavity changes the pressure in the cavity of the pump body 10, thereby realizing the working process of the pump body 10 absorbing and spraying water. The water pumping device of the present application has low transmission noise and low precision requirements, which can reduce costs, and has fewer assembly parts, making assembly simpler and more reliable, which is conducive to miniaturization.

[0042] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A water pumping device, characterized in that: The invention comprises a driving member (30), a cam (20), a piston member and a pump body (10), wherein the cam (20) is connected to the output end of the driving member (30), the pump body (10) comprises a piston chamber, one end of the piston member is slidably connected to the cam (20), and the other end of the piston member is slidably connected to a chamber arm of the piston chamber, the driving member (30) is used to drive the cam (20) to rotate around a first axis, and the cam (20) is used to drive the piston member to reciprocate along a first direction.

2. The water pump device according to claim 1, characterized in that: The cam (20) comprises a main body (21) and a driving groove (22) circumferentially arranged on the outer peripheral surface of the main body (21); the driving groove (22) is provided with a first contact end (221) away from the piston cavity and a second contact end (222) close to the piston cavity along the first axis direction; the piston member comprises a matching portion (51) slidably connected to the driving groove (22); the driving groove (22) is used to drive the matching portion (51) to reciprocate between the first contact end (221) and the second contact end (222) to drive the piston member to reciprocate along a first direction, and the first direction is parallel to or coincides with the direction of the first axis.

3. The water pump device according to claim 2, characterized in that: The cam (20) comprises a first abutting portion (23) and a second abutting portion (24) which are arranged around the circumference of the main body (21); the first abutting portion (23) and the second abutting portion (24) are arranged at intervals along the first axial direction; the first abutting portion (23) has a first curved surface (231) connected to the outer peripheral surface of the main body (21); the second abutting portion (24) has a second curved surface (241) connected to the outer peripheral surface of the main body (21); the first curved surface (231) and the second curved surface (241) are opposite to each other; the first curved surface (231), the second curved surface (241) and the outer peripheral surface of the main body (21) together form the driving groove (22).

4. The water pump device according to claim 2, characterized in that: The cam (20) comprises a first abutment portion (23) arranged along the circumference of the main body (21); the first abutment portion (23) has a first curved surface (231) connected to the outer peripheral surface of the main body (21); the first curved surface (231) and the outer peripheral surface of the main body (21) together form the driving groove (22); the piston member is connected to a reset member for driving the matching portion (51) to move from the second contact end (222) to the first contact end (221).

5. The water pump device according to claim 1, characterized in that: The cam (20) is a disc-shaped structure, and the cam (20) has a radial dimension that changes along the rotation direction of the cam (20). One end of the piston is slidably connected to the outer peripheral surface of the cam (20), and the first direction is perpendicular to the direction of the first axis.

6. The water pump device according to any one of claims 2 to 4, characterized in that: The piston member comprises a piston head (40) and a connecting member (50), one end of the connecting member (50) is slidably connected to the cam (20), and the other end of the connecting member (50) is connected to the piston head (40), and the piston head (40) is slidably connected to the cavity arm of the piston cavity.

7. The water pumping device according to claim 6, characterized in that: The connecting member (50) comprises a connecting main rod (53) and a matching portion (51), wherein the matching portion (51) is connected to an end of the connecting main rod (53) away from the piston head (40).

8. The water pump device according to claim 7, characterized in that: The connecting member (50) further comprises a resisting portion (55) connected between the connecting main rod (53) and the matching portion (51), and a reinforcing rib (54) is connected between the resisting portion (55) and the connecting main rod (53).

9. The water pump device according to claim 8, characterized in that: The connecting member (50) further comprises a connecting portion (52) connected to the connecting main rod (53) and facing one end of the piston head (40); a clamping groove (41) is provided at one end of the piston head (40) facing the connecting portion (52); the connecting portion (52) extends into the clamping groove (41) and is clamped with the clamping groove (41).

10. A water flosser, characterized in that: It comprises a water pumping device as described in any one of claims 1 to 9.

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