Water pump structure and oral irrigator

Abstract

The utility model is suitable for the technical field of oral cavity cleaning, and discloses a water pump structure and a water pick. The water pump structure comprises a shell, a driving mechanism, a transmission mechanism, a piston and a pump body, and the driving mechanism, the transmission mechanism, the piston and the pump body are all installed in the shell. The piston is slidably mounted in the pump body, the transmission mechanism is in transmission connection between the piston and the driving mechanism, and the driving mechanism is used for driving the transmission mechanism to move so as to drive the piston to reciprocate along the pump body. The transmission mechanism comprises a first transmission assembly and a second transmission assembly, the first transmission assembly is a worm and gear transmission assembly and comprises a worm gear and a worm in meshed connection with the worm gear, the worm is fixedly connected to the driving mechanism, and the second transmission assembly is in transmission connection between the worm gear and the piston. According to the water pump structure, the first transmission assembly is the worm gear and worm transmission assembly, transmission of a worm gear and a worm is stable, the contact area is small, noise can be lowered under high-speed rotation, and therefore noise is lowered in the operation process of the water pump structure.

Description

Technical Field

[0001] The utility model relates to the technical field of oral cleaning, in particular to a water pump structure and a water flosser. Background Art

[0002] With the advancement of science and technology and the development of society and the economy, oral care has gained increasing attention from consumers. As a daily oral hygiene tool, oral irrigators can clean teeth and spaces between teeth using a pulsed water flow. The water pump in the irrigator increases the water pressure, allowing the nozzle to spray water at a certain pressure.

[0003] At present, the reciprocating water pumps in related technologies mainly use bevel gears, face gears and cam mechanisms to achieve the reciprocating motion of the water pumps. Among them, the transmission noise of bevel gears and face gears is large, which greatly affects the user experience of the product. Utility Model Content

[0004] The utility model provides a water pump structure and a water flosser, which are intended to solve the technical problem that the existing water pump structure generates noise during operation.

[0005] According to a first aspect of the present invention, an embodiment provides a water pump structure for use in a water flosser, comprising a housing, a drive mechanism, a transmission mechanism, a piston, and a pump body;

[0006] The driving mechanism, the transmission mechanism, the piston and the pump body are all installed in the housing, the piston is slidably installed in the pump body, the transmission mechanism is transmission-connected between the piston and the driving mechanism, and the driving mechanism is used to drive the transmission mechanism to move, thereby driving the piston to reciprocate along the pump body;

[0007] Among them, the transmission mechanism includes a first transmission component and a second transmission component. The first transmission component is a worm gear transmission component, including a worm wheel and a worm meshing with the worm wheel. The worm is fixedly connected to the driving mechanism, and the second transmission component is transmission-connected between the worm wheel and the piston.

[0008] In one embodiment, the teeth of the worm wheel and the worm are both helical teeth.

[0009] In one embodiment, the driving mechanism includes a motor and an output shaft, wherein the output shaft is connected to the motor, and the motor is used to drive the output shaft to rotate;

[0010] The worm is sleeved on the outer periphery of the output shaft and is fixedly connected to the output shaft.

[0011] In one embodiment, the second transmission assembly includes a first transmission gear, a second transmission gear, a cam and a transmission connecting rod;

[0012] The first transmission gear is connected to one end of the worm gear along the axial direction of the worm gear and is meshed with the second transmission gear. The first transmission gear is used to rotate under the drive of the worm gear to drive the second transmission gear to rotate;

[0013] One end of the transmission connecting rod is transmission-connected to the piston, and the other end is transmission-connected to the cam. The cam is eccentrically arranged at one end of the second transmission gear along the axial direction of the second transmission gear. The cam is used to rotate eccentrically under the drive of the second transmission gear to drive the transmission connecting rod and the piston to reciprocate along the pump body.

[0014] In one embodiment, the gear teeth of the first transmission gear and the second transmission gear are both straight teeth.

[0015] In one embodiment, the worm gear and the cam are arranged adjacent to each other.

[0016] In one embodiment, the worm and the transmission connecting rod are respectively arranged on opposite sides of the cam, and both extend in a direction away from the cam.

[0017] In one embodiment, the worm gear and the first transmission gear are an integrally formed structure; and / or,

[0018] The second transmission gear and the cam are an integrally formed structure.

[0019] In one embodiment, the housing includes a first shell and a second shell;

[0020] The transmission mechanism also includes a first connecting shaft and a second connecting shaft, the first connecting shaft is passed through the worm gear and the first transmission gear, one end of the first connecting shaft is rotatably connected to the first housing, and the other end is rotatably connected to the second housing; the second connecting shaft is passed through the cam and the second transmission gear, one end of the second connecting shaft is rotatably connected to the first housing, and the other end is rotatably connected to the second housing.

[0021] According to a second aspect of the present application, an embodiment provides a water flosser comprising the water pump structure of the first aspect described above.

[0022] The water pump structure and water flosser provided by the present invention realize power transmission by providing a first transmission assembly and a second transmission assembly, thereby enabling the piston to reciprocate along the pump body. The first transmission assembly is connected between the drive mechanism and the second transmission assembly. Since the first transmission assembly is connected to the drive mechanism, the rotation speed of the first transmission assembly is relatively high. By configuring the first transmission assembly as a worm gear transmission assembly, the worm gear and the worm gear are smoothly driven, with relatively low noise. Furthermore, the contact area between the worm gear and the worm gear is relatively small compared to the contact area of ​​a bevel gear or a face gear, which is beneficial for reducing noise at high speeds, thereby reducing the noise of the water pump structure during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a water pump structure provided by an embodiment of the present utility model;

[0025] Figure 2 This is an exploded view of the water pump structure provided by an embodiment of the utility model;

[0026] Figure 3 This is an exploded view of the water pump structure provided by an embodiment of the utility model with the outer shell removed.

[0027] Description of Figure Numbers:

[0028] 100. Water pump structure; 10. Casing; 11. First shell; 12. Second shell; 20. Driving mechanism; 21. Motor; 22. Output shaft; 30. Transmission mechanism; 31. First transmission assembly; 311. Worm gear; 312. Worm; 32. Second transmission assembly; 321. First transmission gear; 322. Second transmission gear; 323. Cam; 324. Transmission connecting rod; 33. First connecting shaft; 34. Second connecting shaft; 40. Piston; 50. Pump body.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0033] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] In related technologies, reciprocating water pumps mainly use bevel gears, face gears and cam mechanisms to achieve the reciprocating motion of the water pump. Among them, when the bevel gears and face gears are matched, the transmission noise is large, which greatly affects the product's user experience.

[0035] In view of this, the utility model provides a water pump structure and a punch to reduce the noise generated by the water pump during operation.

[0036] See also Figures 1 to 3The water pump structure 100 provided by the embodiment of the present invention can be applied to water flossers and the like. The water pump structure 100 includes a housing 10, a driving mechanism 20, a transmission mechanism 30, a piston 40 and a pump body 50. The driving mechanism 20, the transmission mechanism 30, the piston 40 and the pump body 50 are all installed in the housing 10. The piston 40 is slidably installed in the pump body 50. The transmission mechanism 30 is transmission-connected between the piston 40 and the driving mechanism 20. The driving mechanism 20 is used to drive the transmission mechanism 30 to move, so as to drive the piston 40 to reciprocate along the pump body 50. Among them, the transmission mechanism 30 includes a first transmission assembly 31 and a second transmission assembly 32. The first transmission assembly 31 is a worm gear transmission assembly, including a worm wheel 311 and a worm 312 meshingly connected to the worm wheel 311. The worm 312 is fixedly connected to the driving mechanism 20. The second transmission assembly 32 is transmission-connected between the worm wheel 311 and the piston 40.

[0037] The above technical solution is adopted to realize power transmission by providing a first transmission assembly 31 and a second transmission assembly 32, thereby enabling the piston 40 to reciprocate along the pump body 50. The first transmission assembly 31 is connected between the drive mechanism 20 and the second transmission assembly 32. Since the first transmission assembly 31 is connected to the drive mechanism 20, the rotation speed of the first transmission assembly 31 is relatively high. By configuring the first transmission assembly 31 as a worm gear transmission assembly, the worm gear 311 and the worm gear 312 transmit smoothly and relatively quietly. In addition, the contact area between the worm gear 311 and the worm gear 312 is smaller than the contact area of ​​a bevel gear or a face gear, which is also conducive to reducing noise at high speeds, thereby reducing the noise of the water pump structure 100 during operation.

[0038] In one embodiment, the teeth of the worm wheel 311 and the worm 312 are both helical. During meshing, the helical teeth of the worm wheel 311 and the worm 312 do not make nearly simultaneous contact, resulting in a smaller contact area and better noise reduction. Furthermore, the reduced contact area reduces impact and wear between the tooth surfaces to a certain extent, thereby achieving higher transmission efficiency and longer life.

[0039] See also Figure 3 The drive mechanism 20 includes a motor 21 and an output shaft 22. The output shaft 22 is connected to the motor 21 and is used to drive the output shaft 22 to rotate. The worm 312 can be sleeved around the outer periphery of the output shaft 22 and fixedly connected to the output shaft 22. This arrangement enables the rotation of the worm 312. In a specific implementation, the motor 21 drives the output shaft 22 to rotate, and the rotation of the output shaft 22 drives the worm 312 to rotate. It is understood that in other embodiments, the drive mechanism 20 can also adopt other drive devices.

[0040] See also Figure 3The second transmission assembly 32 includes a first transmission gear 321, a second transmission gear 322, a cam 323, and a transmission connecting rod 324. The first transmission gear 321 is connected to one end of the worm gear 311 along the axial direction of the worm gear 311 and is meshed with the second transmission gear 322. The first transmission gear 321 is driven by the worm gear 311 to rotate, thereby driving the second transmission gear 322 to rotate. One end of the transmission connecting rod 324 is transmission-connected to the piston 40, and the other end is transmission-connected to the cam 323. The cam 323 is eccentrically arranged at one end of the second transmission gear 322 along the axial direction of the second transmission gear 322. The cam 323 is driven by the second transmission gear 322 to rotate eccentrically, thereby driving the transmission connecting rod 324 and the piston 40 to reciprocate along the pump body 50. Specifically, the first transmission gear 321 is stacked with the worm gear 311, and the second transmission gear 322 is stacked with the cam 323.

[0041] During specific implementation, the rotation of the worm 312 drives the worm wheel 311 to rotate, the rotation of the worm wheel 311 drives the first transmission gear 321 to rotate, the rotation of the first transmission gear 321 drives the second transmission gear 322 to rotate, the rotation of the second transmission gear 322 drives the cam 323 to rotate eccentrically, the eccentric rotation of the cam 323 drives the transmission connecting rod 324 to reciprocate, and the reciprocating motion of the transmission connecting rod 324 drives the piston 40 to reciprocate.

[0042] In one embodiment, the teeth of both the first transmission gear 321 and the second transmission gear 322 are spur teeth. Spur teeth are simple to manufacture and can be completed through conventional machining, resulting in relatively low production costs. Therefore, using spur teeth for the first and second transmission gears 321, 322 can reduce costs. Furthermore, the rotational speed is significantly reduced after transmission by the first transmission assembly 31. Using spur teeth for both the first and second transmission gears 321, 322 eliminates the noise generated by the large contact area.

[0043] In one embodiment, the worm gear 311 and the cam 323 are disposed adjacent to each other. This reduces the axial dimensions of the water pump structure 100 in the first transmission gear 321 and the second transmission gear 322, compared to a technical solution in which the worm gear 311 and the cam 323 are disposed opposite each other, thereby facilitating a miniaturized design of the water pump structure 100.

[0044] In one embodiment, the worm 312 and the transmission connecting rod 324 are respectively disposed on opposite sides of the cam 323 and both extend away from the cam 323. Combined with the meshing connection between the worm 312 and the worm wheel 311, the stacking arrangement of the worm wheel 311 and the first transmission gear 321, the stacking arrangement of the cam 323 and the second transmission gear 322, and the meshing connection between the first transmission gear 321 and the second transmission gear 322, this arrangement can make the layout of the worm 312, the worm wheel 311, the first transmission gear 321, the second transmission gear 322, the cam 323, and the transmission connecting rod 324 more compact, reducing occupied space and facilitating a miniaturized design of the water pump structure 100.

[0045] In one embodiment, the worm gear 311 and the first transmission gear 321 are integrally formed. This configuration saves assembly steps for the worm gear 311 and the first transmission gear 321 during assembly of the water pump structure 100, improving assembly efficiency. Of course, in other embodiments, the worm gear 311 and the first transmission gear 321 can also be manufactured separately and then assembled.

[0046] In one embodiment, the second transmission gear 322 and the cam 323 are integrally formed. This configuration saves assembly steps for the second transmission gear 322 and the cam 323 during assembly of the water pump structure 100, improving assembly efficiency. Of course, in other embodiments, the second transmission gear 322 and the cam 323 can be manufactured separately and then assembled.

[0047] See also Figures 1 to 3 The housing 10 includes a first housing 11 and a second housing 12, which can be arranged in a corresponding manner. The transmission mechanism 30 also includes a first connecting shaft 33 and a second connecting shaft 34. The first connecting shaft 33 is inserted through the worm gear 311 and the first transmission gear 321, with one end of the first connecting shaft 33 being rotatably connected to the first housing 11 and the other end being rotatably connected to the second housing 12; the second connecting shaft 34 is inserted through the cam 323 and the second transmission gear 322, with one end of the second connecting shaft 34 being rotatably connected to the first housing 11 and the other end being rotatably connected to the second housing 12. In this way, the worm gear 311 and the first transmission gear 321 are connected to the housing 10 and can rotate within the housing 10, and the cam 323 and the second transmission gear 322 are connected to the housing 10 and can rotate within the housing 10.

[0048] In a specific implementation, the first shell 11 and the second shell 12 can be connected by a snap connection or by fasteners. The first shell 11 and the second shell 12 can be arranged vertically or horizontally. In this embodiment, the first shell 11 and the second shell 12 are arranged vertically, with the first shell 11 arranged on the upper side and the second shell 12 arranged on the lower side. The upper side refers to the upper side of the water pump structure 100 when the water pump structure 100 is placed horizontally; the lower side refers to the lower side of the water pump structure 100 when the water pump structure 100 is placed horizontally.

[0049] The present invention also provides a water flosser, comprising the water pump structure 100. By adopting the water pump structure 100, the noise generated by the water pump structure 100 can be greatly reduced during the use of the water flosser, thereby improving the user experience.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water pump structure, used in a water flosser, characterized in that: It includes a housing, a driving mechanism, a transmission mechanism, a piston and a pump body; The driving mechanism, the transmission mechanism, the piston and the pump body are all installed in the housing, the piston is slidably installed in the pump body, the transmission mechanism is transmission-connected between the piston and the driving mechanism, and the driving mechanism is used to drive the transmission mechanism to move, thereby driving the piston to reciprocate along the pump body; Among them, the transmission mechanism includes a first transmission component and a second transmission component. The first transmission component is a worm gear transmission component, including a worm wheel and a worm meshing with the worm wheel. The worm is fixedly connected to the driving mechanism, and the second transmission component is transmission-connected between the worm wheel and the piston.

2. The water pump structure according to claim 1, characterized in that: The gear teeth of the worm wheel and the worm are both helical teeth.

3. The water pump structure according to claim 1, characterized in that: The driving mechanism includes a motor and an output shaft, wherein the output shaft is connected to the motor, and the motor is used to drive the output shaft to rotate; The worm is sleeved on the outer periphery of the output shaft and is fixedly connected to the output shaft.

4. The water pump structure according to claim 1, characterized in that: The second transmission assembly includes a first transmission gear, a second transmission gear, a cam and a transmission connecting rod; The first transmission gear is connected to one end of the worm gear along the axial direction of the worm gear and is meshed with the second transmission gear. The first transmission gear is used to rotate under the drive of the worm gear to drive the second transmission gear to rotate; One end of the transmission connecting rod is transmission-connected to the piston, and the other end is transmission-connected to the cam. The cam is eccentrically arranged at one end of the second transmission gear along the axial direction of the second transmission gear. The cam is used to rotate eccentrically under the drive of the second transmission gear to drive the transmission connecting rod and the piston to reciprocate along the pump body.

5. The water pump structure according to claim 4, characterized in that: The gear teeth of the first transmission gear and the second transmission gear are both straight teeth.

6. The water pump structure according to claim 4, characterized in that: The worm gear and the cam are arranged adjacent to each other.

7. The water pump structure according to claim 4, characterized in that: The worm and the transmission connecting rod are respectively arranged on opposite sides of the cam and both extend in a direction away from the cam.

8. The water pump structure according to claim 4, characterized in that: The worm gear and the first transmission gear are an integrally formed structure; and / or, The second transmission gear and the cam are an integrally formed structure.

9. The water pump structure according to any one of claims 4 to 8, characterized in that: The housing includes a first shell and a second shell; The transmission mechanism also includes a first connecting shaft and a second connecting shaft, the first connecting shaft is passed through the worm gear and the first transmission gear, one end of the first connecting shaft is rotatably connected to the first housing, and the other end is rotatably connected to the second housing; the second connecting shaft is passed through the cam and the second transmission gear, one end of the second connecting shaft is rotatably connected to the first housing, and the other end is rotatably connected to the second housing.

10. A water flosser, characterized in that: The water pump structure comprises the water pump structure according to any one of claims 1 to 9.

Images