Water pumping structure and water pick

Abstract

The utility model belongs to the technical field of oral cavity cleaning, and particularly relates to a water pumping structure and a water pick. The water pumping structure comprises a driving part, a rotating part rotationally arranged around a first central axis, a piston part and a pump body with a piston cavity, one end of the piston part is arranged in the piston cavity in a sliding mode, and the other end of the piston part is rotationally connected to the rotating part around a second central axis. The connecting position of the piston piece and the rotating piece and the rotating center of the rotating piece are arranged in a staggered mode, the first central axis is parallel to the second central axis, and the driving piece is used for driving the rotating piece to rotate around the rotating center of the rotating piece so as to drive one end of the piston piece to reciprocate in the piston cavity in the first direction. The utility model can solve the problem of how to simplify the structure of the oral irrigator so as to realize miniaturization.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral cleaning, and particularly relates to a water pump structure 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 structure, 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 structure is provided, which includes a driving member, a rotating member rotatably arranged around a first central axis, a piston member, and a pump body having a piston cavity, one end of the piston member being slidably arranged in the piston cavity, and the other end of the piston member being rotatably connected to the rotating member around a second central axis, the connection position between the piston member and the rotating member being offset from the rotation center of the rotating member, and the first central axis being parallel to the second central axis, the driving member being used to drive the rotating member to rotate around its rotation center to drive one end of the piston member to reciprocate in the piston cavity along a first direction.

[0006] In some embodiments, the rotating member is an eccentric wheel, and the eccentric wheel is provided with an axial hole connected to the driving shaft of the driving member, and the axial hole is offset from the center of the eccentric wheel.

[0007] In some embodiments, the piston member includes a piston head and a connecting member, one end of the connecting member is connected to the rotating member, 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.

[0008] In some embodiments, the connecting member includes a main body and a matching portion connected to the main body at one end away from the piston head, the matching portion is provided with a receiving cavity, the rotating member is arranged in the receiving cavity, the side wall of the rotating member is in contact with the cavity wall of the receiving cavity, and the rotating member rotates around the first center axis to drive the matching portion to move back and forth along the first direction.

[0009] In some embodiments, the rotating member is cylindrical, the receiving cavity is a cylindrical cavity, and the inner diameter of the receiving cavity is equal to the diameter of the rotating member.

[0010] In some embodiments, the rotating member is cylindrical, the inner diameter of the receiving cavity along the first direction is equal to the diameter of the rotating member, the inner diameter of the receiving cavity along the second direction is larger than the diameter of the rotating member, and the second direction is perpendicular to the first direction and the direction of the first center axis.

[0011] In some embodiments, a side wall of the rotating member is provided with a plurality of grooves which are circumferentially arranged and spaced apart from each other, and an extension direction of the grooves is parallel to a direction of the first central axis.

[0012] In some embodiments, the connecting member also includes a connecting portion connected to the main body toward one end of the piston head, and a snap-in groove is opened at one end of the piston head toward the connecting portion, and the connecting portion extends into the snap-in groove and snap-in with the snap-in groove.

[0013] In some embodiments, an annular groove is formed at one end of the piston member away from the rotating member, and the groove wall of the annular groove is elastic.

[0014] In a second aspect, a water flosser is provided, which includes the above-mentioned water pump structure.

[0015] The present application directly drives the rotating member to rotate around the first central axis through the driving member, and the piston member is rotatably connected to the rotating member. Since the connection position between the piston member and the rotating member is offset from the rotation center of the rotating member, the rotational motion of the rotating member can be converted into the reciprocating motion of the piston member, thereby driving the piston member to reciprocate along the first direction in the piston cavity of the pump body to realize the working process of water suction and water spraying of the pump body. The water pump structure 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 It is a schematic diagram of the overall structure of the water pump structure provided in the embodiment of the present application;

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

[0019] Figure 3 It is a schematic diagram of the split structure of the water pump structure provided in the embodiment of the present application;

[0020] Figure 4 is a schematic diagram of the structure of the rotating member and the piston member provided in the embodiment of the present application;

[0021] Figure 5 It is a partial cross-sectional structural schematic diagram of the water pump structure 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. Nozzle; 14. Water inlet; 20. Rotating member; 21. Shaft hole; 22. Channel; 30. Driving member; 40. Piston head; 41. Snap-fit ​​groove; 42. Annular groove; 50. Connecting member; 51. Fitting portion; 511. Accommodating cavity; 52. Connecting portion; 53. Main body; 54. Reinforcing rib; 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 5 The embodiment of the present application provides a water pumping structure, which includes a driving member 30, a rotating member 20 rotatably arranged around a first central axis, a piston member, and a pump body 10 having a piston cavity, one end of the piston member is slidably arranged in the piston cavity, and the other end of the piston member is rotatably connected to the rotating member 20 around a second central axis, and the connection position of the piston member and the rotating member 20 is staggered with the rotation center of the rotating member 20, that is, the connection position of the piston member and the rotating member 20 is not at the same position as the rotation center of the rotating member 20, the first central axis is parallel to the second central axis, and the driving member 30 is used to drive the rotating member 20 to rotate around its rotation center to drive one end of the piston member to reciprocate in the piston cavity along a first direction X. In the present application, the first direction X is perpendicular to the first central axis and the second central axis.

[0029] The present application directly drives the rotating member 20 to rotate around the first central axis through the driving member 30, and the piston member is rotatably connected to the rotating member 20. Since the connection position between the piston member and the rotating member 20 is offset from the rotation center of the rotating member 20, the rotational motion of the rotating member 20 can be converted into the reciprocating motion of the piston member, thereby driving the piston member to reciprocate in the piston cavity of the pump body 10 along the first direction X. The reciprocating motion of the piston member in the piston cavity changes the pressure of the cavity in the pump body 10, thereby realizing the working process of the pump body 10 sucking and spraying water. The water pump structure of the present application has low transmission noise, low precision requirements, can reduce costs, and has fewer assembly parts, making assembly simpler and more reliable, which is conducive to miniaturization.

[0030] Specifically, a water outlet is formed at the top of the pump body 10, and the pump body 10 is also provided with a nozzle 13, which is connected to the water outlet. The pump body 10 is also formed with a water inlet 14, which is located at the bottom of the pump body 10 and is used to communicate with a corresponding water container. The water inlet 14 and the water outlet are both connected to 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 rotating member 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 rotating member 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 nozzle 13, thereby forming a water flow with a certain pressure, thereby realizing the flushing of teeth, gums and tooth gaps.

[0031] Preferably, the rotating member 20 of the present application is an eccentric wheel, and the eccentric wheel is provided with an axial hole 21 connected to the driving shaft of the driving member 30, and the driving shaft is penetrated through the axial hole 21, and the axial hole 21 is staggered with the center of the eccentric wheel. Therefore, when the driving member 30 drives the eccentric wheel to rotate, the eccentric wheel does not rotate around its central axis, but rotates around the first central axis as a whole, so that the piston member can be driven to move back and forth, so as to realize the conversion of the rotational motion of the rotating member 20 into the linear reciprocating motion of the piston member, and then drive the pump body to realize pumping and pumping water. The reciprocating drive mechanism formed by the eccentric wheel and the piston member has a simple structure, is easy to assemble, and has low transmission noise. It can be understood that in other possible embodiments, the rotating member 20 can also be a crank or an elliptical wheel, etc. In the present application, the driving member 30 is a motor.

[0032] It should be noted that when the rotating member 20 rotates around the first center axis as a whole, there are two situations for the setting of the first center axis. One is that the rotating member 20 is completely offset from the first center axis, that is, the first center axis does not pass through the rotating member 20, and the other is that the first center axis passes through the rotating member 20. The first center axis in this embodiment is the second situation, which can prevent the rotating member 20 from occupying too much space, improve space utilization, and make the structure more compact.

[0033] In some embodiments, the piston member includes a piston head 40 and a connecting member 50, one end of the connecting member 50 is connected to the rotating member 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.

[0034] Specifically, Figure 4 As shown, the connecting member 50 includes a main body 53 and a matching portion 51 connected to the main body 53 at one end away from the piston head 40. The matching portion 51 is provided with a receiving cavity 511. The receiving cavity 511 can be open at one end or at both ends. The rotating member 20 is arranged in the receiving cavity 511. The side wall of the rotating member 20 contacts the cavity wall of the receiving cavity 511. The rotating member 20 rotates around the first center axis, so that a force can be applied to the matching portion 51 to drive the matching portion 51 to reciprocate along the first direction X. The receiving cavity 511 and the rotating member 20 are matched, which is convenient for assembly and has a simple structure.

[0035] In one implementation, the rotating member 20 is cylindrical, the receiving cavity 511 is a cylindrical cavity, and the inner diameter of the receiving cavity 511 is equal to the diameter of the rotating member 20. While ensuring the transmission cooperation between the matching portion 51 and the rotating member 20, the space occupied by the matching portion 51 can be reduced.

[0036] In another implementation, the inner diameter of the receiving cavity 511 along the first direction X is equal to the diameter of the rotating member 20, and the inner diameter of the receiving cavity 511 along the second direction Y is larger than the diameter of the rotating member 20, and the second direction Y is perpendicular to the first direction X and the direction of the first center axis, that is, the cross-section of the receiving cavity 511 can be a runway shape, and the cross-section of the receiving cavity 511 consists of a rectangle and semicircles arranged at both ends of the rectangle, so that the rotating member 20 will not move relative to the matching portion 51 in the first direction X, but can move relative to the matching portion 51 in the second direction Y.

[0037] In some embodiments, the side wall of the rotating member 20 is provided with a plurality of grooves 22 which are circumferentially arranged and spaced apart, and the extension direction of the grooves 22 is parallel to the direction of the first central axis. By providing a plurality of grooves 22, a gap is formed between the grooves 22 and the cavity wall of the receiving cavity 511, thereby reducing the contact area between the side wall of the rotating member 20 and the cavity wall of the receiving cavity 511, thereby reducing the friction between the rotating member 20 and the mating portion 51, and making the rotation of the rotating member 20 smoother.

[0038] In addition, a reinforcing rib 54 is connected between the main body 53 and the matching portion 51, and the reinforcing rib 54 between the main body 53 and the matching portion 51 can enhance the connection strength between the main body 53 and the matching portion 51, thereby improving the structural strength of the connector 50. Optionally, reinforcing ribs 54 are provided on both sides of the main body 53, and the reinforcing ribs 54 are triangular pieces, thereby further enhancing the connection strength between the main body 53 and the matching portion 51.

[0039] In some embodiments, the connecting member 50 includes a connecting portion 52 connected to the main body 53 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 is snap-fitted with the snap-fit ​​groove 41. The connecting structure is simple and convenient for disassembly and assembly.

[0040] In addition, if Figure 5 As shown, an annular groove 42 is provided at one end of the piston member away from the rotating member 20. The annular groove 42 is formed on the end surface of the piston head 40 away from the connecting member 50. The annular groove 42 surrounds the piston member in the circumferential direction. The groove wall of the annular groove 42 is elastic. The end of the piston member away from the rotating member 20 is in contact with the water in the piston cavity. It can be understood that the elastic groove wall of the annular groove 42 is the groove wall of the annular groove 42 away from the central axis direction of the piston member, and is in contact with the cavity wall of the piston cavity. When the piston member moves along the positive direction of the first direction X, a positive pressure is formed in the piston cavity, and the positive pressure will drive the liquid in the piston cavity into the annular groove 42. Since the groove wall of the annular groove 42 is elastic, the liquid will make the groove wall of the annular groove 42 more closely fit the cavity wall of the piston cavity under the action of the pressure in the piston cavity, which is equivalent to the groove wall of the annular groove 42 expanding in the direction away from the axis of the piston member. Therefore, during the sliding process of the piston member, the sealing performance between the piston member and the cavity wall of the piston cavity can be further guaranteed to prevent pressure leakage.

[0041] It can be understood that during the water pumping process of the pump body 10, the liquid in the piston cavity gradually flows out of the piston cavity under the pushing action of the piston member, and the pressure in the piston cavity decreases. At this time, the pressure on the liquid in the piston cavity will become smaller, and because the groove wall of the annular groove 42 is elastic, under the action of the elastic restoring force, the groove wall of the annular groove 42 returns to its original state. At this time, the groove wall of the annular groove 42 shrinks toward the axial direction close to the piston member, squeezing the space of the annular groove 42, and the space in the annular groove 42 becomes smaller, and the liquid originally contained in the annular groove 42 will flow into the piston cavity, which is equivalent to continuously increasing the water pressure in the piston cavity, avoiding the water outlet pressure from decreasing too quickly, and further enhancing the water pumping effect.

[0042] In some embodiments, Figure 5As shown, the piston cavity includes a first cavity 11 opening toward the rotating member 20 and a second cavity 12 arranged at an end of the first cavity 11 away from the rotating member 20, 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, and there is a gap between the side wall of the piston head 40 and the cavity wall of the first cavity 11.

[0043] The inner diameter of the second cavity 12 is relatively small, and when the piston head 40 slides in the second cavity 12, the sealing between the piston head 40 and 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.

[0044] 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, reduce the contact area between the piston cavity and the piston head 40, and thus reduce the friction resistance during the reciprocating movement of the piston head 40. The reduction of 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. In addition, there is a gap between the side wall of the piston head 40 and the cavity wall of the first cavity 11, which can also make it easier for the piston head 40 to extend into the first cavity 11, thereby improving the convenience of installation.

[0045] 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 rotating member 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.

[0046] In summary, the present application directly drives the rotating member 20 to rotate around the first central axis through the driving member 30, and the piston member is rotatably connected to the rotating member 20. Since the connection position between the piston member and the rotating member 20 is offset from the rotation center of the rotating member 20, the rotational motion of the rotating member 20 can be converted into the reciprocating motion of the piston member, thereby driving the piston member to reciprocate in the piston cavity of the pump body 10 along the first direction X. The reciprocating motion of the piston member in the piston cavity changes the pressure of the cavity in the pump body 10, thereby realizing the working process of the pump body 10 sucking and spraying water. The water pump structure of the present application has low transmission noise, low precision requirements, can reduce costs, and has fewer assembly parts, making assembly simpler and more reliable, which is conducive to miniaturization.

[0047] 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 pump structure, characterized in that: The invention comprises a driving member (30), a rotating member (20) rotatably arranged around a first central axis, a piston member and a pump body (10) having a piston cavity, wherein one end of the piston member is slidably arranged in the piston cavity, and the other end of the piston member is rotatably connected to the rotating member (20) around a second central axis, the connection position between the piston member and the rotating member (20) is offset from the rotation center of the rotating member (20), and the first central axis is parallel to the second central axis, and the driving member (30) is used to drive the rotating member (20) to rotate around its rotation center to drive one end of the piston member to move back and forth in the piston cavity along a first direction.

2. The water pump structure according to claim 1, characterized in that: The rotating member (20) is an eccentric wheel, and the eccentric wheel is provided with an axial hole (21) connected to the driving shaft of the driving member (30), and the axial hole (21) is arranged offset from the center of the eccentric wheel.

3. The water pump structure according to claim 2, characterized in that: The piston member comprises a piston head (40) and a connecting member (50), one end of the connecting member (50) is connected to the rotating member (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.

4. The water pump structure according to claim 3, characterized in that: The connecting member (50) comprises a main body (53) and a matching portion (51) connected to one end of the main body (53) away from the piston head (40); the matching portion (51) is provided with a receiving cavity (511); the rotating member (20) is arranged in the receiving cavity (511); the side wall of the rotating member (20) is in contact with the cavity wall of the receiving cavity (511); the rotating member (20) rotates around the first central axis to drive the matching portion (51) to move back and forth along the first direction.

5. The water pump structure according to claim 4, characterized in that: The rotating member (20) is cylindrical, the receiving cavity (511) is a cylindrical cavity, and the inner diameter of the receiving cavity (511) is equal to the diameter of the rotating member (20).

6. The water pump structure according to claim 4, characterized in that: The rotating member (20) is cylindrical, the inner diameter of the receiving cavity (511) along a first direction is equal to the diameter of the rotating member (20), the inner diameter of the receiving cavity (511) along a second direction is greater than the diameter of the rotating member (20), and the second direction is perpendicular to the first direction and the direction of the first central axis.

7. The water pump structure according to claim 4, characterized in that: The side wall of the rotating member (20) is provided with a plurality of grooves (22) which are circumferentially surrounding and spaced apart from each other, and the extending direction of the grooves (22) is parallel to the direction of the first central axis.

8. The water pump structure according to claim 4, characterized in that: The connecting member (50) further comprises a connecting portion (52) connected to the main body (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).

9. The water pump structure according to any one of claims 1 to 8, characterized in that: An annular groove (42) is formed at one end of the piston member away from the rotating member (20), and the groove wall of the annular groove (42) is elastic.

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

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