Pump body sealing structure
By designing a double-layer sealing structure in the pump body sealing structure of the oral irrigator, the problem of damage to electrical components caused by water leakage between the piston unit and the piston cavity is solved, and better sealing effect and equipment safety are achieved.
Patent Information
- Application Number
- CN202422049876.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the prior art, the reciprocating motion system of the piston unit cannot achieve a good sealing effect because the sealing unit and the connecting rod unit cannot achieve a good sealing effect, causing water to leak out from the gap between the piston unit and the piston cavity, which may in turn cause damage to the electrical components inside the hedge device.
A pump body sealing structure is designed, including a pump housing, a reciprocating member and a sealing unit. The connecting rod unit is provided with a first sealing groove and a second sealing groove arranged in parallel. The sealing unit has a connecting rod sealing end and a housing sealing end. The connecting rod sealing end is provided with a sealing ring matching the sealing groove to form a double-layer sealing structure to ensure that the sealing unit and the connecting rod unit are kept in a sealing connection state.
Through the double-layer sealing structure, water leaking from the gap between the piston unit and the piston cavity can be effectively prevented from further entering the thrust device, avoiding damage to internal electrical components, and significantly improving the waterproof sealing effect of the pump body sealing structure.
Smart Images
Figure CN222910244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of teeth cleaning devices, in particular to a pump body sealing structure of an oral irrigator. Background Art
[0002] An oral irrigator (commonly known as a water flosser) usually includes a shell, a pump, a water tank, a circuit board, a battery, a motor and a nozzle. The battery is used to power the circuit board and the motor. The pump is usually a reciprocating piston pump. The motor drives the piston in the piston pump to reciprocate through a transmission part, and the water in the water tank is sprayed out from the pointed end of the nozzle in the form of a pulsed water flow, thereby cleaning the teeth, gaps between teeth, gums or tongue.
[0003] The piston pump is composed of a pump cylinder, a piston, an inlet and outlet valves, etc. The motor drives the piston to reciprocate in the pump cylinder. When the piston moves outward relative to the pump cylinder and the working volume of the pump cylinder increases, the inlet valve opens and the outlet valve closes, and water enters the pump cylinder from the water tank under pressure; when the piston moves inward relative to the pump cylinder and the working volume of the pump cylinder decreases, the inlet valve closes and the outlet valve opens, and water is discharged from the pump cylinder under pressure. The reciprocating motion of the piston, combined with the periodic opening and closing of the inlet and outlet valves, can realize the function of the piston pump to suck in and discharge liquid.
[0004] In the prior art, the reciprocating motion of the piston unit is driven by the connecting rod unit. If the sealing unit and the connecting rod unit cannot achieve a good sealing effect, the water leaking from the gap between the piston unit and the piston cavity will leak into the inside of the oral irrigator, which may damage the electrical components inside the oral irrigator. Therefore, a pump body sealing structure with good sealing performance is needed to prevent the water leaking from the gap during the movement of the piston of the oral irrigator from damaging the internal electrical components. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a pump body sealing structure with good sealing performance and capable of preventing water leaking from a piston gap from damaging internal electrical components.
[0006] The technical solution of the utility model to solve the above technical problems is as follows:
[0007] The utility model provides a pump body sealing structure, comprising a pump housing, a reciprocating component and a sealing unit, the pump housing is provided with a piston cavity and a pump water inlet and a pump water outlet which are fluidically connected to the piston cavity, the reciprocating component comprises a piston unit and a connecting rod unit connected to the piston unit, the piston unit is arranged in the piston cavity, the connecting rod unit is provided with a first sealing groove and a second sealing groove which are arranged in parallel, the sealing unit has a connecting rod sealing end and a housing sealing end, the connecting rod sealing end is provided with a first sealing ring which matches the first sealing groove and a second sealing ring which matches the second sealing groove.
[0008] The utility model has the following beneficial effects:
[0009] The connecting rod unit of the pump body sealing structure of the utility model is provided with a first sealing groove and a second sealing groove arranged in parallel, and the connecting rod sealing end of the sealing unit is correspondingly provided with a first sealing ring and a second sealing ring. When the connecting rod unit drives the piston unit to reciprocate, the double-layer sealing structure can always keep the sealing unit and the connecting rod unit in a sealed connection state when the connecting rod unit moves. Even if water leaks from the gap between the piston unit and the piston cavity, the sealing unit of the double-layer sealing structure can prevent the leaked water from further entering the interior of the water flosser, thereby avoiding damage to internal electrical components. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0011] Figure 1 It is a schematic diagram of the overall structure of the oral irrigator;
[0012] Figure 2 It is a schematic diagram of the cutaway structure of an oral irrigator;
[0013] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;
[0014] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle;
[0015] Figure 5 for Figure 2 A partial enlarged schematic diagram of point C in the middle;
[0016] Figure 6 This is a schematic diagram of the overall structure of the pump body sealing structure of the utility model;
[0017] Figure 7 It is a schematic diagram of the cutaway structure of the pump body sealing structure of the utility model;
[0018] Figure 8 for Figure 7 A partial enlarged schematic diagram of point D in the middle;
[0019] Figure 9 This is a schematic diagram of the first angle decomposition structure of the pump body sealing structure of the utility model;
[0020] Figure 10Schematic diagram of the second - angle decomposition structure of the pump body sealing structure of the present utility model;
[0021] Figure 11 Schematic diagram of the overall structure of the sealing unit of the pump body sealing structure of the present utility model;
[0022] Figure 12 Schematic diagram of the sectional structure of the sealing unit of the pump body sealing structure of the present utility model;
[0023] Figure 13 Schematic diagram of the overall structure of the connecting rod unit of the pump body sealing structure of the present utility model;
[0024] Figure 14 Schematic diagram of the sectional structure of the connecting rod unit of the pump body sealing structure of the present utility model. Detailed implementation manners
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] Figures 1 to 5 Shows the structure of an oral irrigator applying the pump body sealing structure of the present utility model.
[0027] As Figures 1 to 5 shown, the oral irrigator includes a housing 10, a water storage tank 11, a circuit board 12, a battery 13, a nozzle 14, a gear 15, a motor 16, and a pump 17. Among them, the battery 13 is used to supply power to the circuit board 12 and the motor 16. The pump 17 is a reciprocating piston pump, and the motor 16 drives the piston in the pump 17 to reciprocate, and then sprays the water in the water storage tank 11 from the tip of the nozzle 14 in the form of pulsed water flow.
[0028] Figures 6 to 14 Shows the specific structure of the pump body sealing structure of the present utility model.
[0029] As Figures 6 to 14As shown in the figure, the pump body sealing structure of the present utility model includes a pump housing 20, a reciprocating member 30 and a sealing unit 40. The pump housing 20 is provided with a piston chamber 21, a pump water inlet 22 and a pump water outlet 23 that are in fluid communication with the piston chamber 21. The reciprocating member 30 includes a piston unit 31 and a connecting rod unit 32 connected to the piston unit 31. The piston unit 31 is disposed in the piston chamber 21. The connecting rod unit 32 is provided with a first sealing groove 321 and a second sealing groove 322 arranged in parallel. The sealing unit 40 has a connecting rod sealing end 41 and a housing sealing end 42. The connecting rod sealing end 41 is provided with a first sealing ring 411 that matches the first sealing groove 321 and a second sealing ring 412 that matches the second sealing groove 322.
[0030] In the pump body sealing structure of the present utility model, the connecting rod unit 32 of the connecting rod unit 32 is provided with a first sealing groove 321 and a second sealing groove 322 arranged in parallel. The connecting rod sealing end 41 of the sealing unit 40 is correspondingly provided with a first sealing ring 411 and a second sealing ring 412. When the connecting rod unit 32 drives the piston unit 31 to reciprocate, the double-layer sealing structure can always keep the sealing unit 40 in a sealed connection state with the connecting rod unit 32 when the connecting rod unit 32 moves. Even if water enters the piston chamber 21 from the gap between the piston unit 31 and the piston chamber 21, the sealing unit 40 can prevent the leaked water from further entering the inside of the oral irrigator along the connecting rod unit 32, avoiding damage to the internal electrical components.
[0031] When the sealing unit 40 of the pump body sealing structure of the present utility model is deformed under the action of the connecting rod unit 32, the double-layer sealing structure can significantly reduce the influence of the deformation on the sealing effect, and thus significantly improve the waterproof sealing effect of the pump body sealing structure.
[0032] Regarding the understanding of the "reciprocating member 30", in this embodiment, the reciprocating member 30 includes a piston unit 31 and a connecting rod unit 32 that are connected to each other. In different embodiments, the reciprocating member 30 (i.e., the piston unit 31 and the connecting rod unit 32) can be set as an integral part, and one end close to the pump water inlet and the pump water outlet is set as the piston end (equivalent to the piston unit 31 in this embodiment), and the other parts except the piston end are the connecting rod parts (equivalent to the connecting rod unit 32 in this embodiment).
[0033] Regarding the understanding of the "piston unit 31 is disposed in the piston chamber 21", it means that the part of the piston unit 31 that is in direct contact with the liquid to be pumped is in the piston chamber 21, and there should be no limitation on whether the other parts of the piston unit 31 are completely placed in the piston chamber 21. In different embodiments, the piston unit 31 may be completely placed in the piston chamber 21 as a whole, or completely placed in the piston chamber 21 in the pushing state and partially placed outside the piston chamber 21 in the retracting state, or there is always a part of the piston unit 31 outside the piston chamber 21 during operation.
[0034] Regarding the understanding of "the connecting rod unit 32 is provided with a first sealing groove 321 and a second sealing groove 322 arranged in parallel", it means that an annular first sealing groove 321 and a second sealing groove 322 are arranged in parallel along the axial direction of the connecting rod unit 32 and perpendicular to the axis direction.
[0035] Regarding the understanding of the number of "the first sealing ring 411" and "the second sealing ring 412", it should not be limited to having and only having two layers of sealing rings, but should be understood as having at least two layers of sealing rings. Similarly, regarding the understanding of the number of "the first sealing groove 321" and "the second sealing groove 322", it should not be limited to having and only having two sealing grooves, but should be understood as having at least two sealing grooves.
[0036] In this preferred embodiment, the first sealing groove 321 is an arc-shaped groove, and the first sealing ring 411 is an arc-shaped protrusion; the second sealing groove 322 is an arc-shaped groove, and the second sealing ring 412 is an arc-shaped protrusion. Setting the first sealing ring 411 and the second sealing ring 412 as arc-shaped protrusions and the first sealing groove 321 and the second sealing groove 322 as arc-shaped grooves can facilitate the assembly and installation of the connecting rod sealing end 41 and the connecting rod unit 32, while taking into account a good sealing effect.
[0037] Regarding the understanding of the shapes of "the first sealing ring 411" and "the second sealing ring 412", it not only includes the "outward convex" shape shown in this embodiment. In different embodiments, "the first sealing ring 411" and "the second sealing ring 412" can also be set as "inward concave" shapes, and the corresponding structures of the first sealing groove 321 and the second sealing groove 322 can be set as "outward convex" shapes.
[0038] In this preferred embodiment, both the first sealing groove 321 and the second sealing groove 322 are arc-shaped grooves, and both the first sealing ring 411 and the second sealing ring 412 are arc-shaped protrusions; the arcs of the first sealing groove 321 and the second sealing groove 322 are the same, and the arcs of the first sealing ring 411 and the second sealing ring 412 are the same. Regarding the understanding of "the same arc", it means that the radii of the arc parts of the first sealing groove 321 and the second sealing groove 322, and the first sealing ring 411 and the second sealing ring 412 are the same. The same arc can make the compression amounts of the first sealing ring 411 and the second sealing ring 412 basically the same when the connecting rod sealing end 41 of the sealing unit 40 is in a connected and sealed state, so as to avoid the situation that one of the sealing rings is not tightly sealed.
[0039] Preferably, the connecting rod unit 32 is provided with a first step 323 near the first sealing groove 321 and a second step 324 near the second sealing groove 322. The connecting rod sealing end 41 is limited between the first step 323 and the second step 324. The "stepped" first step 323 and second step 324 can not only fix the connecting rod sealing end 41, but also further enhance the sealing effect between the connecting rod sealing end 41 and the connecting rod unit 32.
[0040] Between the connecting rod sealing end 41 of the sealing unit 40 and the housing sealing end 42 is a sealing unit connecting portion 43 in a corrugated or inclined surface shape.
[0041] In this preferred embodiment, the sealing unit 40 divides the piston chamber 21 into independent spaces. The understanding of "independent space" means that the piston chamber 21 is an isolated and separate independent space with respect to the gear housing 50. In this preferred embodiment, the connecting rod sealing end 41 of the sealing unit 40 is sealingly connected to the connecting rod unit 32, the housing sealing end 42 is sealingly connected to the housing sealing groove 511, the first surface 44 of the sealing unit communicates with the piston chamber 21, and the second surface 45 of the sealing unit communicates with spaces that need to be waterproof, such as the motor accommodation chamber 54 and / or the gear accommodation chamber 53 of the gear housing 50. In this way, the independent and separated setting of the piston chamber 21 can be achieved. In other embodiments, the housing sealing end 42 can be arranged to be sealingly connected to other components. The principle is to set the piston chamber 21 as an independent space to achieve the technical effect of waterproofing. For example, the housing sealing end 42 can be sealingly connected to the outer surface of the pump housing 20, and the independent space setting of the piston chamber 21 can also be achieved.
[0042] The pump body sealing structure further includes a gear housing 50, and the gear housing 50 is provided with a housing sealing groove 511 matching the housing sealing end 42.
[0043] The housing sealing end 42 is provided with a first sealing protrusion 421, and the first sealing protrusion 421 abuts against the housing sealing groove 511. The "protruding" first sealing protrusion 421 can enhance the sealing effect between the housing sealing end 42 and the housing sealing groove 511. In different embodiments, the housing sealing end 42 may not be provided with the first sealing protrusion 421 as long as the tight fit between the housing sealing end 42 and the housing sealing groove 511 can be ensured.
[0044] The pump body sealing structure further includes a separating member 60. The separating member 60 is provided with a sealing outer cavity 61, and the housing sealing end 42 is placed between the sealing outer cavity 61 and the housing sealing groove 511.
[0045] The sealed end 42 of the housing is provided with a second sealing protrusion 422, and the second sealing protrusion 422 abuts against the sealed outer cavity 61. The second sealing protrusion 422 arranged in a "protrusion" shape can enhance the sealing effect between the sealed end 42 of the housing and the sealed outer cavity 61. In different embodiments, the second sealing protrusion 422 may not be provided on the sealed end 42 of the housing, as long as the sealed end 42 of the housing can be tightly fitted with the sealed outer cavity 61.
[0046] In this preferred embodiment, the gear housing 50 includes a first housing part 51 and a second housing part 52 that are snap-connected. The housing sealing groove 511 is arranged on the first housing part 51, which is convenient for the fixed connection between the sealed end 42 of the housing and the gear housing 50. In different embodiments, the housing sealing groove 511 may be arranged by the second housing part 52, or the housing sealing groove 511 may be jointly arranged by the first housing part 51 and the second housing part 52.
[0047] The gear housing 50 is provided with a gear accommodation cavity 53 and a motor accommodation cavity 54. The gear accommodation cavity 53 is provided with a gear 15 connected to the link unit 32, and the motor accommodation cavity 54 is provided with a motor 16 connected to the gear 15.
[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.
Claims
1. A pump body sealing structure, comprising a pump housing and a reciprocating component, wherein the pump housing is provided with a piston cavity and a pump water inlet and a pump water outlet in fluid communication with the piston cavity, the reciprocating component comprises a piston unit and a connecting rod unit connected to the piston unit, the piston unit is arranged in the piston cavity, and is characterized in that: It also includes a sealing unit, the connecting rod unit is provided with a first sealing groove and a second sealing groove arranged in parallel, the sealing unit has a connecting rod sealing end and a housing sealing end, the connecting rod sealing end is provided with a first sealing ring matching the first sealing groove and a second sealing ring matching the second sealing groove.
2. The pump body sealing structure according to claim 1, characterized in that: The first sealing groove is an arc-shaped groove, and the first sealing ring is an arc-shaped protrusion.
3. The pump body sealing structure according to claim 1, characterized in that: The second sealing groove is an arc-shaped groove, and the second sealing ring is an arc-shaped protrusion.
4. The pump body sealing structure according to claim 1, characterized in that: The first sealing groove and the second sealing groove are both arc-shaped grooves, and the first sealing ring and the second sealing ring are both arc-shaped protrusions.
5. The pump body sealing structure according to claim 4, characterized in that: The first sealing groove and the second sealing groove have the same curvature, and the first sealing ring and the second sealing ring have the same curvature.
6. The pump body sealing structure according to claim 1, characterized in that: The connecting rod unit is provided with a first step position at a position close to the first sealing groove.
7. The pump body sealing structure according to claim 1, characterized in that: The connecting rod unit is provided with a second step position at a position close to the second sealing groove.
8. The pump body sealing structure according to claim 1, characterized in that: A sealing unit connecting portion in a pleated or inclined shape is provided between the connecting rod sealing end of the sealing unit and the housing sealing end.
9. The pump body sealing structure according to any one of claims 1 to 8, characterized in that: The sealing unit divides the piston chamber into independent spaces.
10. The pump body sealing structure according to any one of claims 1 to 8, characterized in that: It also includes a gear housing, which is provided with a housing sealing groove matching the housing sealing end.
11. The pump body sealing structure according to claim 10, characterized in that: The housing sealing end is provided with a first sealing protrusion, and the first sealing protrusion abuts against the housing sealing groove.
12. The pump body sealing structure according to claim 10, characterized in that: It also includes a partition component, which is provided with a sealed outer cavity, and the shell sealing end is placed between the sealed outer cavity and the shell sealing groove.
13. The pump body sealing structure according to claim 12, characterized in that: The sealing end of the housing is provided with a second sealing protrusion, and the second sealing protrusion abuts against the sealing outer cavity.
14. The pump body sealing structure according to claim 10, characterized in that: The gear housing comprises a first housing portion and a second housing portion which are snap-fitted together, and the housing sealing groove is arranged in the first housing portion.
15. The pump body sealing structure according to claim 10, characterized in that: The gear housing is provided with a gear accommodating chamber and a motor accommodating chamber. The gear accommodating chamber is provided with a gear connected to the connecting rod unit, and the motor accommodating chamber is provided with a motor connected to the gear.