A fluid pump and toothbrush

Abstract

The utility model relates to a kind of fluid pumps, including pump main body, motor and waterproof part, pump main body includes shell and the pumping mechanism being located in shell, shell is equipped with fluid chamber and mounting hole;Motor includes body and output shaft, body is fixed to shell, output shaft passes through mounting hole and extends into fluid chamber, and output shaft is driven connection with pumping mechanism;Waterproof part includes mounting portion and the elastic waterproof portion being set on mounting portion, through the sealing hole being set on elastic waterproof portion, mounting portion is set at mounting hole, output shaft passes through sealing hole, and the elastic waterproof portion is driven sealing hole's hole wall and output shaft closely by the elasticity of elastic waterproof portion.

Description

Technical Field

[0001] This utility model relates to the field of toiletries technology, and in particular to a fluid pump and a toothbrush. Background Technology

[0002] A fluid pump is a device used to pump gases or liquids. A fluid pump typically includes a motor and a pump body connected to the motor drive. The motor continuously compresses air, which is then pumped in a specified direction by the pump body.

[0003] However, in existing fluid pumps, if the pump body is in a humid environment, moisture from the outside air may be drawn in during operation, which may cause water to enter the motor and damage it. Utility Model Content

[0004] In view of this, the present invention provides a fluid pump and a toothbrush to solve the problem of water easily entering the motor in the prior art.

[0005] To achieve one, some, or all of the above objectives, or other objectives, this utility model proposes:

[0006] A fluid pump, comprising:

[0007] The pump body includes a housing and a pumping mechanism disposed within the housing. The housing has a fluid chamber and a mounting hole.

[0008] The motor includes a body and an output shaft. The body is fixed to the housing, and the output shaft passes through the mounting hole and extends into the fluid chamber. The output shaft is driven by the pumping mechanism.

[0009] The waterproof component includes a mounting part and an elastic waterproof part disposed on the mounting part. The elastic waterproof part is provided with a through sealing hole. The mounting part is disposed at the mounting hole. The output shaft passes through the sealing hole, and the elasticity of the elastic waterproof part drives the hole wall of the sealing hole to fit tightly against the output shaft.

[0010] In some embodiments, the sealing hole is tapered, with the first end of the sealing hole facing the machine body and the second end of the sealing hole moving away from the machine body and converging towards the output shaft.

[0011] The diameter of the second end of the sealing hole is smaller than the diameter of the output shaft; and / or, the wall of the second end of the sealing hole fits tightly against the output shaft.

[0012] In some embodiments, the mounting part is fixed to the machine body, a limiting boss is provided in the mounting hole, and the side of the mounting part facing the fluid chamber abuts against the limiting boss.

[0013] In some embodiments, the resilient waterproof portion and the output shaft extend beyond the limiting boss into the fluid chamber; and / or,

[0014] A second elastic protrusion is provided on the top side of the mounting part, and the second elastic protrusion fits tightly against the limiting protrusion.

[0015] In some embodiments, a protruding shaft mounting platform is provided on the side of the machine body facing the mounting hole, the output shaft passes through the shaft mounting platform, and the mounting part is sleeved on the shaft mounting platform; and / or,

[0016] A first elastic protrusion is provided on the periphery of the mounting part, and the first elastic protrusion fits tightly against the inner wall of the mounting hole.

[0017] In some embodiments, the fluid pump further includes a locking bolt and a waterproof rubber ring. The locking bolt includes a head and a rod portion connecting the head. A fixing hole is also provided on the housing. The head is located in the fluid chamber. The rod portion passes through the fixing hole and is connected to the body. The waterproof rubber ring is provided around the rod portion and is sandwiched between the head and the housing.

[0018] In some embodiments, the housing is further provided with a mating groove that surrounds and connects to the fixing hole, and the waterproof rubber ring is accommodated in the mating groove.

[0019] In some embodiments, the fluid chamber includes an inlet chamber and an outlet chamber, a partition plate is provided inside the housing to separate the inlet chamber and the outlet chamber, a first flow hole is provided on the partition plate to connect the inlet chamber and the outlet chamber, and an inlet is provided on the housing to connect the inlet chamber and an outlet is provided to connect the outlet chamber.

[0020] The pumping mechanism includes:

[0021] The movable component is located inside the inlet cavity and is driven to the output shaft. A second flow passage is provided on the movable component.

[0022] An elastic flow damper is installed inside the inlet cavity, and a flow damping chamber is provided inside the elastic flow damper. The flow damping chamber is connected to the outlet cavity through a first flow passage. A third flow passage is provided on the elastic flow damper to connect the flow damping chamber and the inlet cavity. The third flow passage is arranged opposite to the second flow passage. A baffle is provided at the third flow passage to cover the second flow passage. The baffle can elastically deform into the flow damping chamber to open the second flow passage.

[0023] A one-way valve component includes a connected positioning part and a canopy part. The positioning part is fixedly mounted on a partition plate, and the canopy part is located in the outflow cavity and covers the first flow passage. The canopy part can elastically deform to open the first flow passage.

[0024] In some embodiments, the housing includes a top cover and a lower cover, a partition plate is located between the top cover and the lower cover, the top cover and the partition plate enclose an upper cavity, the partition plate and the lower cover enclose a lower cavity, and the movable member and the elastic flow member are located in the lower cavity;

[0025] A partition wall is provided in the upper cavity to divide the upper cavity into a first cavity and a second cavity. A through hole is also provided on the partition to connect the first cavity and the lower cavity, so that the first cavity and the lower cavity together form an inlet cavity and the second cavity forms an outlet cavity. The inlet and outlet are both formed on the top cover. The inlet connects to the first cavity and the outlet connects to the second cavity.

[0026] In some embodiments, a first enclosure wall is provided on the partition plate, and a second enclosure wall is provided on the top cover. The first enclosure wall and the second enclosure wall are joined together to form a movable cavity. A first flow hole connects the movable cavity and the lower cavity, and the umbrella part moves within the movable cavity.

[0027] A connection port is provided on the first or second enclosure wall, and the movable cavity is connected to the second cavity through the connection port.

[0028] This utility model also proposes a toothbrush, which includes a toothbrush body and a fluid pump.

[0029] In some embodiments, the toothbrush body has an installation cavity and a fluid channel, the toothbrush body has a suction hole that connects to the installation cavity, the toothbrush body also has a spray hole that connects to the fluid channel and bristles arranged around the spray hole, the fluid pump is installed in the installation cavity, the inlet of the fluid pump is connected to the suction hole, and the outlet of the fluid pump is connected to the fluid channel through a pipe.

[0030] Implementing the embodiments of this utility model will have the following beneficial effects:

[0031] By using the above-mentioned fluid pump, waterproof components can be tightly attached to the output shaft to prevent moisture in the fluid chamber from entering the motor along the output shaft, thereby improving waterproof performance and service life. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of a fluid pump according to one embodiment;

[0034] Figure 2 This is a schematic cross-sectional view of a fluid pump according to one embodiment;

[0035] Figure 3 This is a schematic cross-sectional view of a waterproof component according to one embodiment;

[0036] Figure 4 Another cross-sectional structural schematic diagram of a fluid pump according to one embodiment;

[0037] Figure 5 This is a schematic diagram of the exploded assembly structure of a fluid pump according to one embodiment;

[0038] Figure 6 This is a schematic diagram of the split structure of the upper chamber of a fluid pump according to one embodiment;

[0039] Figure 7 This is a schematic diagram of the structure of an elastic flow drum component according to one embodiment;

[0040] Figure 8 A schematic diagram of the moving part and the elastic bulging part in one embodiment;

[0041] Figure 9 This is a schematic diagram of a toothbrush structure according to one embodiment;

[0042] Figure 10 This is a schematic cross-sectional view of a toothbrush head according to one embodiment;

[0043] in:

[0044] 1-Pump body; 11-Outer shell; 12-Pumping mechanism; 1101-Fluid chamber; 1102-Mounting hole; 1103-Fixing hole; 1104-Matching groove; 1105-Inlet; 1106-Outlet; 11011-Inlet cavity; 11012-Outlet cavity; 11021-Limiting boss; 121-Moving part; 122-Elastic slug; 123-One-way valve; 1211-Second flow passage; 1212-Working part; 1213-Drive rod; 1220 - Drum flow cavity; 1221 - Third flow hole; 1222 - Baffle; 1231 - Positioning part; 1232 - Umbrella part; 111 - Partition plate; 112 - Top cover; 113 - Lower shell; 114 - Upper cavity; 115 - Lower cavity; 116 - First cavity; 117 - Second cavity; 1111 - First flow hole; 1112 - Through hole; 1113 - Partition wall; 1114 - First enclosure wall; 1121 - Second enclosure wall; 1122 - Connection port; 1124 - Movable cavity;

[0045] 2-Motor; 21-Built body; 22-Output shaft; 211-Shaft mounting plate;

[0046] 3-Waterproof component; 31-Mounting part; 32-Elastic waterproof part; 320-Sealing hole; 3201-First end of sealing hole; 3202-Second end of sealing hole; 311-First elastic protrusion; 312-Second elastic protrusion;

[0047] 4-Locking bolt; 41-Head; 42-Ring;

[0048] 5- Waterproof rubber ring;

[0049] 1a - Toothbrush body;

[0050] 10a-Installation cavity; 11a-Fluid channel; 101a-Suction hole; 111a-Spray hole; 12a-Brush bristles; 13a-Pipe body. Detailed Implementation

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0054] See appendix Figures 1 to 10 This utility model proposes a fluid pump, including a pump body 1, a motor 2 and a waterproof component 3.

[0055] The pump body 1 includes a housing 11 and a pumping mechanism 12 disposed within the housing 11. The housing 11 has a fluid chamber 1101 and a mounting hole 1102. The motor 2 includes a body 21 and an output shaft 22. The body 21 is fixed to the outside of the housing 11. The output shaft 22 passes through the mounting hole 1102 and extends into the fluid chamber 1101. The output shaft 22 is drivenly connected to the pumping mechanism 12.

[0056] The waterproof component 3 includes a mounting portion 31 and an elastic waterproof portion 32 disposed on the mounting portion 31. The elastic waterproof portion 32 has a through-hole 320. The mounting portion 31 is located at the mounting hole 1102, and the output shaft 22 passes through the 320. The elasticity of the elastic waterproof portion 32 causes the wall of the 320 to fit tightly against the output shaft 22. Specifically, the waterproof component 3 is made of silicone and has sufficient elastic deformation capability.

[0057] Therefore, the waterproof component 3 is used to tightly adhere to the output shaft 22, preventing moisture in the fluid chamber 1101 from entering the motor 2 along the output shaft 22, thus improving waterproof performance and service life. Consequently, due to the motor's waterproof performance, this fluid pump can transport both gas and liquid.

[0058] Specifically, see the appendix. Figure 2 and 3 The sealing hole 320 is tapered. The first end 3201 of the sealing hole 320 faces the body 21 and has a larger diameter. The second end 3202 of the sealing hole 320 is away from the body 21 and converges towards the output shaft 22, with a smaller diameter than the diameter of the output shaft 22. When the output shaft 22 passes through the sealing hole 320, the second end 3202 of the sealing hole 320 is in an open state, and the elastic waterproof part 32 uses its elasticity to achieve a tight fit with the output shaft 22. Therefore, the elastic waterproof part 32 is hollow and tapered, with the sealing hole 320 located at its highest point. At this point, the elastic waterproof part 32 only contacts the output shaft 22 at the second end 3202 of the sealing hole 320, reducing frictional loss.

[0059] Furthermore, to ensure the reliability of the waterproof function of the elastic waterproof part 32, the diameter of the second end 3202 of the sealing hole 320 is made to be 0.2mm to 0.4mm smaller than the diameter of the output shaft 22, with a certain interference fit, to ensure that the elastic waterproof part 32 generates sufficient elastic force, while the resistance to the movement of the output shaft 22 is relatively small.

[0060] In some embodiments, see Appendix Figure 2 The waterproof component 3 is fixed to the motor 2. Specifically, the mounting part 31 is fixed to the body 21, and then the body 21 is fixed to the outer casing 11 by locking bolts 4. A protruding shaft connector 211 is provided on the side of the body 21 facing the mounting hole 1102. The output shaft 22 passes through this shaft connector 211. The mounting part 31 is cylindrically sleeved on the shaft connector 211 and can be fixed with adhesive. A limiting boss 11021 is provided inside the mounting hole 1102. When the shaft connector 211 extends into the mounting hole 1102, the mounting part 31 is correspondingly inserted into the mounting hole 1102, and the side of the mounting part 31 facing the fluid chamber 1101 abuts against the limiting boss 11021. The mounting part 31 seals the mounting hole 1102, preventing gas / fluid in the fluid chamber 1101 from leaking out of the mounting hole 1102. The flexible waterproof part 32 and the output shaft 22 extend beyond the limiting boss 11021 into the fluid chamber 1101, while also preventing the output shaft 22 from directly contacting the limiting boss 11021.

[0061] To ensure the sealing performance of the mounting part 31 against the mounting hole 1102, in some embodiments, see the attached drawing. Figure 2 and 3 The mounting portion 31 has a first elastic protrusion 311 on its periphery and a second elastic protrusion 312 on its top side. The first elastic protrusion 311 fits tightly against the inner wall of the mounting hole 1102, and the second elastic protrusion 312 fits tightly against the limiting boss 11021. When the mounting portion 31 is inserted into the mounting hole 1102, both the first elastic boss and the second elastic protrusion 312 are compressed, using elasticity to achieve a tight fit with the inner wall of the mounting hole 1102 / the limiting boss 11021, thereby sealing the mounting hole 1102.

[0062] On the other hand, since the outer casing 11 is fixedly connected to the motor 2 body 21 by the locking bolt 4, there may be a water leakage problem at the locking bolt 4. Therefore, in some embodiments, see Appendix Figure 4 The fluid pump also includes a waterproof rubber ring 5. The locking bolt 4 includes a head 41 and a rod 42 connecting the head 41. A fixing hole 1103 is also provided on the outer casing 11. The head 41 is located inside the fluid chamber 1101. The rod 42 passes through the fixing hole 1103 and is threaded onto the body 21. The waterproof rubber ring 5 is fitted around the rod 42 and is sandwiched between the head 41 and the outer casing 11. When the locking bolt 4 is tightened, the head 41 and the outer casing 11 together compress the waterproof rubber ring 5 and cause the waterproof rubber ring 5 to deform elastically. The elasticity of the waterproof rubber ring 5 isolates the fixing hole 1103 from the fluid chamber 1101.

[0063] To ensure the reliability of the waterproof rubber ring 5, in some embodiments, the outer casing 11 is further provided with a mating groove 1104 surrounding and communicating with the fixing hole 1103. The waterproof rubber ring 5 is accommodated in the mating groove 1104, and the depth of the mating groove 1104 is less than the diameter of the waterproof rubber ring 5. The presence of the mating groove 1104 can prevent the waterproof rubber ring 5 from being pressed out by the head 41 of the locking bolt 4.

[0064] For the structure of pump body 1, please refer to the appendix. Figure 2 and 5 In some embodiments, the fluid chamber 1101 includes an inlet chamber 11011 and an outlet chamber 11012. A partition plate 111 is provided inside the outer shell 11, which separates the inlet chamber 11011 and the outlet chamber 11012. A first flow hole 1111 is provided on the partition plate 111 to connect the inlet chamber 11011 and the outlet chamber 11012. The outer shell 11 is also provided with an inlet 1105 connecting the inlet chamber 11011 and an outlet 1106 connecting the outlet chamber 11012.

[0065] Correspondingly, see the appendix. Figures 5 to 8The pumping mechanism 12 includes a movable component 121, an elastic flow-driving component 122, and a one-way valve component 123. The movable component 121 is located within the inlet cavity 11011 and is drivenly connected to the output shaft 22. A through second flow-passing hole 1211 is provided on the movable component 121. The elastic flow-driving component 122 is installed within the inlet cavity 11011, and a flow-driving chamber 1220 is provided within the elastic flow-driving component 122. The flow-driving chamber 1220 communicates with the outlet cavity 11012 through a first flow-passing hole 1111. The elastic flow damper 122 has a third flow hole 1221 that connects the flow damper cavity 1220 and the inlet cavity 11011. The third flow hole 1221 is arranged opposite to the second flow hole 1211. The elastic flow damper 122 has a baffle 1222 at the third flow hole 1221 to cover the second flow hole 1211. The baffle 1222 can elastically deform into the flow damper cavity 1220 to open the second flow hole 1211. That is, the baffle 1222 acts as a one-way valve. The baffle 1222 is used to prevent the air / liquid in the flow damper cavity 1220 from flowing back into the inlet cavity 11011 through the second flow hole 1211. The one-way valve component 123 includes a connected positioning part 1231 and an umbrella part 1232. The positioning part 1231 is fixedly installed on the partition plate 111. The umbrella part 1232 is located in the outlet cavity 11012 and covers the first flow hole 1111. The umbrella part 1232 can elastically deform to open the first flow hole 1111. The umbrella part 1232 functions similarly to the baffle 1222 to prevent air / liquid in the outlet cavity 11012 from flowing back into the blast cavity 1220 through the first flow hole 1111.

[0066] Therefore, it can be seen that when motor 2 is working, external air / liquid enters the inlet cavity 11011 from the inlet port 1105. The output shaft 22 drives the movable part 121 to reciprocate and press the elastic drum member 122. During the compression of the elastic drum member 122, because the baffle 1222 prevents the air / liquid in the drum cavity 1220 from flowing back to the inlet cavity 11011 through the second flow hole 1211, the air / liquid in the drum cavity 1220 can only enter through the first flow hole 1111 to open the umbrella part 1232. The fluid exits through the outlet chamber 11012 and is then discharged directionally through the outlet port 1106. When the elastic bulging member 122 resets, a negative pressure is generated in the bulging chamber 1220. Because the umbrella part 1232 prevents the air / liquid in the outlet chamber 11012 from flowing back into the bulging chamber 1220, the bulging chamber 1220 can only draw gas / fluid from the inlet chamber 11011. The air / liquid in the inlet chamber 11011 pushes open the baffle 1222 after passing through the second flow hole 1211, and then enters the bulging chamber 1220 through the third flow hole 1221. The reciprocating pressing of the movable member 121 on the elastic bulging member 122 repeats the above process, ultimately enabling the pump body 1 to achieve directional exhaust or drainage.

[0067] To facilitate the installation of the various components of the pumping mechanism 12, in some embodiments, see the appendix. Figure 5 and 6 The outer casing 11 includes a top cover 112 and a lower casing 113. A partition plate 111 is located between the top cover 112 and the lower casing 113. The top cover 112, the partition plate 111, and the lower casing 113 are fixed by screws. A sealing ring can be provided at the connection between the three to prevent air or liquid leakage. The top cover 112 and the partition plate 111 enclose an upper cavity 114, and the partition plate 111 and the lower casing 113 enclose a lower cavity 115. The movable part 121 and the elastic bleeder 122 are located in the lower cavity 115.

[0068] The upper cavity 114 is divided into a first cavity 116 and a second cavity 117 by a partition wall 1113. A through hole 1112 is also provided on the partition wall, connecting the first cavity 116 and the lower cavity 115. This through hole 1112 can penetrate the elastic flow drum 122 as needed, so that the first cavity 116 and the lower cavity 115 together form the inlet cavity 11011, and the second cavity 117 forms the outlet cavity 11012. Correspondingly, an inlet 1105 and an outlet 1106 are both formed on the top cover 112. The inlet 1105 connects to the first cavity 116, and the outlet 1106 connects to the second cavity 117. This arrangement facilitates the forming of the top cover 112, the partition wall 111, and the lower shell 113, as well as the installation of the pumping mechanism 12.

[0069] Further, see appendix. Figure 6 A first enclosure wall 1114 is provided on the partition plate 111, and a second enclosure wall 1121 is provided on the top cover 112. The first enclosure wall 1114 and the second enclosure wall 1121 are joined together to form a movable cavity 1124. A first flow hole 1111 connects the movable cavity 1124 and the lower cavity 115. The umbrella part 1232 moves within the movable cavity 1124. A connection port 1122 is provided on the first enclosure wall 1114 or the second enclosure wall 1121, and the movable cavity 1124 and the second cavity 117 are connected through the connection port 1122. In addition, in some embodiments, the first cavity 116 and the second cavity 117 are separated by the partition wall 1113, the first enclosure wall 1114 and the second enclosure wall 1121, making the structural design of the pump body 1 more compact and reducing the volume of the pump body 1.

[0070] To improve the efficiency of pumping air / liquid in the pump body 1, in some embodiments, an eccentric wheel is installed on the output shaft 22, and the movable part 121 is provided with two working parts 1212 and a drive rod 1213 connecting the two working parts 1212. The drive rod 1213 is mounted on the eccentric wheel. Correspondingly, two flow chambers 1220, two one-way valves 123, and two movable chambers 1124 are provided. As the eccentric wheel rotates, the two working parts 1212 can swing back and forth, and the two working parts 1212 respectively apply pressure to the two flow chambers 1220, thereby achieving double the pumping efficiency of air / liquid.

[0071] See appendix Figure 9 and 10 This utility model also provides a toothbrush, which includes a toothbrush body 1a and the aforementioned fluid pump. Since toothbrushes are typically used in environments with high humidity, such as bathrooms and kitchens, the use of the aforementioned fluid pump can effectively prevent water from entering the motor 2, thus effectively improving its service life.

[0072] Specifically, the toothbrush body 1a has an installation cavity 10a and a fluid channel 11a. The bottom end of the toothbrush body 1a has a suction hole 101a that connects to the installation cavity 10a. The top end of the toothbrush body 1a has a spray hole 111a that connects to the fluid channel 11a, and bristles 12a surrounding the spray hole 111a. Components such as the fluid pump, battery, and circuit board are all installed within the installation cavity 10a. The fluid pump's inlet 1105 connects to the suction hole 101a, and the fluid pump's outlet 1106 connects to the fluid channel 11a via a tube 13a.

[0073] When the toothbrush is used to spray water or other solutions to brush teeth, a solution storage cavity can be provided inside the toothbrush body 1a, and the suction hole 101a is connected to the solution storage cavity.

[0074] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A fluid pump, characterized in that, include: The pump body (1) includes a housing (11) and a pumping mechanism (12) disposed in the housing (11). The housing (11) has a fluid chamber (1101) and a mounting hole (1102). The motor (2) includes a body (21) and an output shaft (22). The body (21) is fixed to the outer shell (11). The output shaft (22) passes through the mounting hole (1102) and extends into the fluid chamber (1101). The output shaft (22) is drivenly connected to the pumping mechanism (12). Waterproof component (3), the waterproof component (3) includes a mounting part (31) and an elastic waterproof part (32) disposed on the mounting part (31). The elastic waterproof part (32) is provided with a through sealing hole (320). The mounting part (31) is disposed at the mounting hole (1102). The output shaft (22) passes through the sealing hole (320), and the elastic force of the elastic waterproof part (32) drives the hole wall of the sealing hole (320) to fit tightly against the output shaft (22).

2. The fluid pump according to claim 1, characterized in that, The sealing hole (320) is tapered, with its first end (3201) facing the body (21) and its second end (3202) moving away from the body (21) and converging towards the output shaft (22). The diameter of the second end (3202) of the sealing hole (320) is smaller than the diameter of the output shaft (22); and / or, the wall of the second end (3202) of the sealing hole (320) is in close contact with the output shaft (22).

3. The fluid pump according to claim 1, characterized in that, The mounting part (31) is fixed on the body (21), and a limiting boss (11021) is provided in the mounting hole (1102). The side of the mounting part (31) facing the fluid chamber (1101) abuts against the limiting boss (11021).

4. The fluid pump according to claim 3, characterized in that, The elastic waterproof part (32) and the output shaft (22) extend beyond the limiting boss (11021) into the fluid chamber (1101); and / or, The top side of the mounting part (31) is provided with a second elastic protrusion (312), which is in close contact with the limiting boss (11021).

5. The fluid pump according to claim 1, characterized in that, The body (21) has a protruding shaft mounting plate (211) on the side facing the mounting hole (1102), the output shaft (22) passes through the shaft mounting plate (211), and the mounting part (31) is sleeved on the shaft mounting plate (211); and / or, The mounting part (31) has a first elastic protrusion (311) on its periphery, and the first elastic protrusion (311) fits tightly against the inner wall of the mounting hole (1102).

6. The fluid pump according to claim 1, characterized in that, It also includes a locking bolt (4) and a waterproof rubber ring (5). The locking bolt (4) includes a head (41) and a rod (42) connecting the head (41). The outer shell (11) is also provided with a fixing hole (1103). The head (41) is located in the fluid chamber (1101). The rod (42) passes through the fixing hole (1103) and is connected to the body (21). The waterproof rubber ring (5) is arranged around the rod (42) and is sandwiched between the head (41) and the outer shell (11).

7. The fluid pump according to claim 6, characterized in that, The outer shell (11) is also provided with a mating groove (1104) surrounding the fixing hole (1103) and connecting to the fixing hole (1103), and the waterproof rubber ring (5) is accommodated in the mating groove (1104).

8. The fluid pump according to claim 1, characterized in that, The fluid chamber (1101) includes an inlet chamber (11011) and an outlet chamber (11012). A partition plate (111) is provided inside the outer shell (11). The partition plate (111) separates the inlet chamber (11011) and the outlet chamber (11012). A first flow hole (1111) is provided on the partition plate (111) to connect the inlet chamber (11011) and the outlet chamber (11012). An inlet (1105) connecting the inlet chamber (11011) and an outlet (1106) connecting the outlet chamber (11012) are provided on the outer shell (11). The pumping mechanism (12) includes: A movable component (121) is located inside the inlet cavity (11011) and is drivenly connected to the output shaft (22). A second flow passage (1211) is provided on the movable component (121). An elastic flow damper (122) is installed inside the inlet cavity (11011), and a flow damping cavity (1220) is provided inside the elastic flow damper (122). The flow damping cavity (1220) is connected to the outlet cavity (11012) through a first flow passage (1111). The elastic flow damper (122) has a connection between the flow damping cavity (1220) and the inlet cavity (11011). 1) The third flow passage (1221) is arranged opposite to the second flow passage (1211), and the elastic flow drum (122) is provided with a baffle (1222) at the third flow passage (1221) to cover the second flow passage (1211). The baffle (1222) can elastically deform into the flow drum cavity (1220) to open the second flow passage (1211). A one-way valve component (123) includes a connected positioning part (1231) and an umbrella part (1232). The positioning part (1231) is fixedly installed on the partition plate (111). The umbrella part (1232) is located in the outlet cavity (11012) and covers the first flow hole (1111). The umbrella part (1232) can elastically deform to open the first flow hole (1111).

9. The fluid pump according to claim 8, characterized in that, The outer shell (11) includes a top cover (112) and a lower shell (113), the partition plate (111) is located between the top cover (112) and the lower shell (113), the top cover (112) and the partition plate (111) enclose an upper cavity (114), the partition plate (111) and the lower shell (113) enclose a lower cavity (115), and the movable part (121) and the elastic bleeding part (122) are located in the lower cavity (115); The upper cavity (114) is provided with a partition wall (1113) to divide the upper cavity (114) into a first cavity (116) and a second cavity (117). The partition wall is also provided with a through hole (1112) connecting the first cavity (116) and the lower cavity (115) so that the first cavity (116) and the lower cavity (115) together constitute the inlet cavity (11011) and the second cavity (117) constitutes the outlet cavity (11012). The inlet port (1105) and the outlet port (1106) are both formed on the top cover (112). The inlet port (1105) connects to the first cavity (116) and the outlet port (1106) connects to the second cavity (117).

10. The fluid pump according to claim 9, characterized in that, The partition plate (111) is provided with a first enclosure wall (1114), the top cover (112) is provided with a second enclosure wall (1121), the first enclosure wall (1114) and the second enclosure wall (1121) are joined together to form an active cavity (1124), the first flow hole (1111) connects the active cavity (1124) and the lower cavity (115), and the umbrella part (1232) moves within the active cavity (1124); A connection port (1122) is provided on the first enclosure (1114) or the second enclosure (1121), and the movable cavity (1124) and the second cavity (117) are connected through the connection port (1122).

11. A toothbrush, characterized in that, It includes a toothbrush body (1a) and a fluid pump as described in any one of claims 1 to 10.

12. The toothbrush according to claim 11, characterized in that, The toothbrush body (1a) has an installation cavity (10a) and a fluid channel (11a) inside. The toothbrush body (1a) has a suction hole (101a) that connects to the installation cavity (10a). The toothbrush body (1a) also has a spray hole (111a) that connects to the fluid channel (11a) and bristles (12a) arranged around the spray hole (111a). The fluid pump is installed in the installation cavity (10a). The inlet (1105) of the fluid pump is connected to the suction hole (101a). The outlet (1106) of the fluid pump is connected to the fluid channel (11a) through a tube (13a).

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