CN114469415A

CN114469415A - Pump for tooth flushing device and tooth flushing device

Info

Publication number: CN114469415A
Application number: CN202111547566.2A
Authority: CN
Inventors: 韩元平; 邹文君; 王天宇; 欧阳兆胜
Original assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Current assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-13

Abstract

The invention relates to a pump for a tooth flushing device and the tooth flushing device, wherein the pump for the tooth flushing device comprises a pump shell, an electromagnet, a buffer part, a first magnet and a second magnet; the piston comprises a piston rod and a piston head connected to one end of the piston rod, the piston head is arranged in the first chamber in a sliding mode, and the piston rod is at least partially located in the second chamber; the electromagnet is fixedly connected to the second chamber, and the piston rod is slidably arranged in the inner ring of the electromagnet in a penetrating manner; the first magnet and the second magnet are fixed on the piston rod at intervals along the axial direction of the piston rod, the electromagnet is positioned between the first magnet and the second magnet, and the magnetic poles of the sides, close to each other, of the first magnet and the second magnet are opposite; buffering parts are arranged between the first magnet and the electromagnet and between the second magnet and the electromagnet. The pump for the tooth flushing device provided by the invention has long service life.

Description

Pump for tooth flushing device and tooth flushing device

Technical Field

The invention relates to the technical field of pumps, in particular to a pump for a tooth flushing device and the tooth flushing device.

Background

The tooth washing device as a novel oral cavity cleaning device has the effects on periodontal health care, gingivitis treatment, deformity correction and dental crown restoration and is proved by various tests.

The water pump is used for pressurizing water to generate a water column of superfine high-pressure pulses, the water column flushes any position of an oral cavity through the nozzle, the water column comprises a toothbrush, a dental floss and a deep gingival part, the toothpick can not easily reach the deep part of the tooth and the deep part of the gum, food residues and harmful bacteria trapped in the tooth gaps which can not be reached by the toothbrush and the dental floss can be powerfully removed, tooth decay, gingivitis, dental calculus and periodontitis can be effectively prevented, dental plaque on the surface of the tooth can be effectively cleaned, the oral cavity can be kept clean, people can feel fresh, meanwhile, the gum can be massaged and stimulated, blood circulation is improved, toothache is relieved, gingival bleeding is inhibited, tongue fur is cleaned, and oral peculiar smell is removed.

The water pump of the tooth flushing device is used as an important part in the tooth flushing device, the existing water pump structure mostly adopts a cam to drive a piston rod, and the piston rod moves in a cavity, so that a water column of superfine high-pressure pulses is generated. However, the motion of the piston pull rod is not linear, so that the piston is stressed unevenly, the load is unstable, the abrasion of the piston is increased, the service life of the piston is shortened, and the service life of the whole tooth flusher is influenced.

Disclosure of Invention

One object of the present invention is to propose a pump for a dental irrigator to improve the life of the piston.

To achieve the above object, a first aspect of the present invention provides a pump for a dental irrigator, comprising:

the pump comprises a pump shell, a first cavity and a second cavity, wherein the first cavity and the second cavity are communicated with each other;

the piston comprises a piston rod and a piston head connected to one end of the piston rod, the piston head is arranged in the first chamber in a sliding mode, and the piston rod is at least partially located in the second chamber;

the piston rod is slidably arranged in the inner ring of the electromagnet in a penetrating manner;

the electromagnet is positioned between the first magnet and the second magnet, and the magnetic poles of the sides, close to each other, of the first magnet and the second magnet are opposite;

the bolster, first magnet with between the electro-magnet, and second magnet with all be provided with between the electro-magnet the bolster.

Optionally, the buffer member is a spring, and the piston rod is slidably disposed through the spring.

Optionally, a groove is formed in one end, close to the first magnet, of the electromagnet and one end, close to the second magnet, of the electromagnet, the buffer part is arranged in the groove, and the other part of the buffer part extends out of the groove.

Optionally, the inner wall of the second chamber is provided with a first flange and a second flange at intervals, and the electromagnet is clamped between the first flange and the second flange.

Optionally, annular grooves are formed in two axial ends of the piston rod of the electromagnet, the annular grooves extend to the peripheral surface of the electromagnet, the first flange and the second flange are at least partially located in the annular grooves, and inner rings of the first flange and the second flange are abutted to groove walls of the annular grooves.

Optionally, projections of the first magnet and the first flange in the axial direction of the piston rod at least partially coincide, and an end face of the first flange protrudes out of an end face of the electromagnet, or the end face of the first flange is flush with the end face of the electromagnet;

the second magnet and the projection of the second flange on the axial direction of the piston rod are at least partially overlapped, the end face of the second flange protrudes out of the end face of the electromagnet, or the end face of the second flange is flush with the end face of the electromagnet.

Optionally, a sealing element is connected to the piston head, and the sealing element is in sliding abutment with an inner wall of the first chamber.

Optionally, the sealing element is a sealing ring, the sealing ring is sleeved on the piston head, and at least part of the sealing ring protrudes out of the circumferential surface of the piston head.

Optionally, an installation groove is formed in the circumferential surface of the piston head, and the sealing ring portion is arranged in the installation groove.

It is another object of the present invention to provide a dental irrigator which improves the life thereof.

To achieve the purpose, the second aspect of the invention adopts the following technical scheme:

a tooth flusher comprises the pump for the tooth flusher.

Therefore, according to the technical scheme provided by the invention, the piston is driven to linearly reciprocate in the pump shell under the action of the electromagnet, the first magnet and the second magnet, so that the high-pressure water column is sprayed out from the pump shell to form the high-pressure pulse water column. The buffer member can prevent the first magnet and the second magnet from rigidly colliding with the electromagnet, thereby greatly reducing or even eliminating the abrasion of the first magnet, the second magnet and the electromagnet, and reducing or even eliminating the noise of the pump for the tooth flushing device.

Drawings

FIG. 1 is a schematic structural diagram of a pump for a tooth flusher according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the pump for the tooth flusher provided by the embodiment of the invention when the pump sprays water.

In the figure:

1. a pump housing; 11. a piston cylinder; 12. a housing; 13. a first chamber; 14. a second chamber; 15. a first flange; 16. a second flange; 17. a water inlet; 18. a water outlet;

2. a piston; 21. a piston rod; 22. a piston head;

3. an electromagnet; 31. an iron core; 32. a coil; 33. a groove;

4. a first magnet;

5. a second magnet; 6. a buffer member; 7. and a seal.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the present invention, the directional terms such as "upper", "lower", "left", "right", "inner" and "outer" are used for easy understanding without making a contrary explanation, and thus do not limit the scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a pump for a dental irrigator, which is used in the dental irrigator to pressurize water therein to cause the dental irrigator to generate a high-pressure pulsed water column, but is not limited thereto, and can also be used in other water columns which need to generate high-pressure pulses to improve the life of the piston 2.

As shown in fig. 1, the present embodiment provides a pump for a dental irrigator comprising a pump housing 1, a piston 2, an electromagnet 3, a first magnet 4, a second magnet 5 and a buffer 6. The pump housing 1 is configured to accommodate the piston 2, the electromagnet 3, the first magnet 4, the second magnet 5, and the buffer 6. The piston 2 is driven to linearly reciprocate in the pump shell 1 under the action of the electromagnet 3, the first magnet 4 and the second magnet 5, so that high-pressure water columns are sprayed out of the pump shell 1.

Specifically, the pump case 1 has a first chamber 13 and a second chamber 14 that are communicated with each other, a water inlet 17 and a water outlet 18 are opened at one end of the pump case 1, and the water inlet 17 and the water outlet 18 are both communicated with the first chamber 13 and located at one end of the first chamber 13 far away from the second chamber 14.

The piston 2 comprises a piston rod 21 and a piston head 22 connected to one end of the piston rod 21, the piston head 22 is slidably arranged in the first chamber 13, and the piston rod 21 is at least partially located in the second chamber 14.

The electromagnet 3 is fixedly connected to the second chamber 14, and the piston rod 21 is slidably disposed through the inner ring of the electromagnet 3. The first magnet 4 and the second magnet 5 are fixed to the piston rod 21 at an interval in the axial direction of the piston rod 21. The electromagnet 3 is positioned between the first magnet 4 and the second magnet 5, and the magnetic poles of the sides of the first magnet 4 and the second magnet 5 which are close to each other are opposite.

For convenience of explanation, it is specified that one of the two magnets is the first magnet 4 close to the first chamber 13 and the second magnet 5 far from the first chamber 13, but in other embodiments, the second magnet 5 is close to the first chamber 13 and the first magnet 4 is far from the first chamber 13. When the electromagnet 3 is energized with a forward current, the first magnet 4 is attracted, the second magnet 5 is repelled, the piston rod 21 moves toward the side of the second magnet 5 (the lower side as viewed in fig. 1) under these two forces, and moves to the position as viewed in fig. 1, the air pressure in the first chamber 13 decreases, and water is sucked into the first chamber 13 through the water inlet 17. Then, the electromagnet 3 is energized with a reverse current, the first magnet 4 is subjected to a repulsive force, the second magnet 5 is subjected to an attractive force, the piston rod 21 moves to the side where the first magnet 4 is located (as shown in fig. 2 at the upper side), the pressure of the water in the first chamber 13 is rapidly increased, the water in the first chamber 13 is ejected from the water outlet 18 and forms a high-pressure water column, and when the piston head 22 moves to the top of the first chamber 13 (as shown in fig. 2), all the water in the first chamber 13 is discharged, so that a cycle is completed.

In the embodiment, by changing the current of the electromagnet 3, acting force is generated between the electromagnet 3 and the first magnet 4 and the second magnet 5 which are fixed on the piston rod 21, so that the piston 2 reciprocates, the rotating motion of the cam in the prior art is ingeniously changed into linear reciprocating motion, and the structure is simple and stable; by utilizing the transmission of the electromagnetic principle, the piston 2 and the electromagnet 3 do not generate mechanical friction and mechanical abrasion, and the service life of the product is prolonged.

In this embodiment, the piston rod 21 makes a linear motion under the guiding action of the inner ring of the electromagnet 3, so as to ensure the stability of the operation of the piston 2, make the stress of the piston 2 uniform, and increase the service life of the piston. In other alternative embodiments, the piston head 22 and the first chamber 13 may be in a clearance fit, so that the first chamber 13 also has a guiding effect on the piston head 22 to ensure that the piston rod 21 reciprocates in a straight line.

Preferably, to ensure the tightness of the first chamber 13, a sealing element 7 is connected to the piston head 22, the sealing element 7 being in sliding abutment with the inner wall of the first chamber 13. The seal 7 may act as a seal to vary the pressure or pressure of the air within the first chamber 13 by movement of the piston head 22 and prevent water leakage between the first chamber 13 and the piston head 22.

Preferably, the sealing element 7 is a sealing ring which is sleeved on the piston head 22 and at least partially protrudes from the periphery of the piston head 22, so that the sealing element 7 can prevent the piston head 22 from contacting with the inner wall of the first chamber 13 and prevent the piston 2 and the pump shell 1 from being worn out besides having a sealing function.

Further, the piston head 22 has a mounting groove formed on a circumferential surface thereof, and the sealing ring is partially disposed in the mounting groove. The mounting groove can effectively prevent the sealing ring from moving along the axial direction of the piston head 22, and the sealing ring is prevented from falling off.

In other alternative embodiments, the sealing element 7 may be a sealing ring, and instead the sealing element 7 is a sealing plate (not shown), the sealing plate is connected to an end of the piston head 22 away from the piston rod 21, and the circumferential direction of the sealing plate protrudes beyond the circumferential direction of the piston head 22, so that the circumferential direction of the sealing plate abuts against the inner wall of the first chamber 13 to achieve the sealing effect.

Further, for example, the first magnet 4 and the second magnet 5 may be fixed to the piston rod 21 by interference fit, or may be fixed to the piston rod 21 by key connection. It is understood that the electromagnet 3 includes a core 31 and a coil 32, the coil 32 is wound outside the core 31, and the coil 32 is energized to magnetize the core 31 and generate a magnetic field. Since the electromagnet 3 is a conventional technology, the detailed principle and structure of the electromagnet 3 will not be described herein.

Buffering members 6 are disposed between the first magnet 4 and the electromagnet 3, and between the second magnet 5 and the electromagnet 3. The buffer member 6 can prevent the first magnet 4 and the second magnet 5 from rigidly colliding with the electromagnet 3, thereby greatly reducing or even eliminating the abrasion of the first magnet 4, the second magnet 5 and the electromagnet 3 and reducing or even eliminating the noise of the pump for the dental irrigator.

Preferably, the buffer member 6 is a spring, and the piston rod 21 is slidably disposed through the spring, and further because the spring is located between the first magnet 4 and the electromagnet 3 and between the second magnet 5 and the electromagnet 3, one end of the first magnet 4 and one end of the electromagnet 3 are respectively abutted to two ends of one spring, so that the rigid contact between the first magnet 4 and the electromagnet 3 is converted into the elastic contact, and the other end of the second magnet 5 and the other end of the electromagnet 3 are respectively abutted to two ends of the other spring, so that the rigid contact between the second magnet 5 and the electromagnet 3 is converted into the elastic contact.

Furthermore, a groove 33 is formed in one end of the electromagnet 3 close to the first magnet 4 and one end of the electromagnet close to the second magnet 5, the buffer member 6 is partially disposed in the groove 33, and the other part of the buffer member extends out of the groove 33. The groove 33 has a guiding function for the spring, and prevents the buffer member 6 from being deformed obliquely with respect to the axial direction thereof to damage the buffer member 6. It is also possible to connect one end of the buffer member 6 to the groove bottom of the groove 33, thereby preventing the buffer member 6 from moving in the axial direction of the piston rod 21.

To facilitate fixing the electromagnet 3, preferably, a first flange 15 and a second flange 16 are provided at intervals on the inner wall of the second chamber 14, and the electromagnet 3 is sandwiched between the first flange 15 and the second flange 16 to fix the electromagnet 3 to the second chamber 14.

The two ends of the electromagnet 3 along the axial direction of the piston rod 21 are both provided with annular grooves, the annular grooves extend to the peripheral surface of the electromagnet 3, the first flange 15 and the second flange 16 are at least partially positioned in the annular grooves, and the inner rings of the first flange 15 and the second flange 16 are abutted against the groove walls of the annular grooves, so that the first flange 15 and the second flange 16 can also prevent the electromagnet 3 from moving along the radial direction.

The first magnet 4 and the first flange 15 at least partially coincide in projection in the axial direction of the piston rod 21, and the end face of the first flange 15 protrudes beyond the end face of the electromagnet 3, or the end face of the first flange 15 is flush with the end face of the electromagnet 3. The second magnet 5 and the second flange 16 at least partially overlap in projection in the axial direction of the piston rod 21, and the end face of the second flange 16 protrudes beyond the end face of the electromagnet 3, or the end face of the second flange 16 is flush with the end face of the electromagnet 3. Therefore, when the first magnet 4 and the second magnet 5 move to the extreme positions, the first magnet 4 and the second magnet 5 do not contact the electromagnet 3, but contact the first flange 15 and the second flange 16, thereby ensuring the safety of the electromagnet 3.

Preferably, the pump housing 1 comprises a piston cylinder 11 and a housing 12, wherein the piston cylinder 11 is connected to one end of the housing 12, the piston cylinder 11 has a first chamber 13, the housing 12 has a second chamber 14, and one end of the housing 12 has an opening so that the first chamber 13 and the second chamber 14 are communicated.

To facilitate mounting of the electromagnet 3, the housing 12 may be of a split construction, i.e. the housing 12 is divided into two detachable half-shells by a plane passing through the central axis of the housing 12. The two half shells may be detachably connected by means of bolts or the like.

The embodiment also provides a tooth irrigator which comprises the pump for the tooth irrigator. The tooth flusher provided by the embodiment has long service life.

Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A pump for a dental irrigator, comprising:

the pump comprises a pump shell (1) and a pump body, wherein the pump shell (1) is provided with a first cavity (13) and a second cavity (14) which are communicated with each other, one end of the pump shell (1) is provided with a water inlet (17) and a water outlet (18), and the water inlet (17) and the water outlet (18) are both communicated with the first cavity (13) and are positioned at one end, far away from the second cavity (14), of the first cavity (13);

a piston (2) comprising a piston rod (21) and a piston head (22) connected to one end of the piston rod (21), the piston head (22) being slidably arranged in the first chamber (13), the piston rod (21) being at least partially located in the second chamber (14);

the electromagnet (3) is fixedly connected to the second chamber (14), and the piston rod (21) penetrates through the inner ring of the electromagnet (3) in a sliding mode;

the electromagnet (3) is positioned between the first magnet (4) and the second magnet (5), and the magnetic poles of the sides, close to each other, of the first magnet (4) and the second magnet (5) are opposite;

a buffer member (6), the first magnet (4) and the electromagnet (3) are arranged between each other, and the second magnet (5) and the electromagnet (3) are arranged between each other and are provided with the buffer member (6).

2. Pump for a dental irrigator according to claim 1, characterized in that said buffer (6) is a spring through which said piston rod (21) is slidingly disposed.

3. Pump for a dental irrigator according to claim 1, characterized in that the end of the electromagnet (3) close to the first magnet (4) and the end close to the second magnet (5) are each provided with a recess (33), the buffer (6) being partly arranged in the recess (33) and the other part protruding out of the recess (33).

4. Pump for a water pick according to claim 1, characterized in that the inner wall of the second chamber (14) is provided with a first flange (15) and a second flange (16) at intervals, the electromagnet (3) being interposed between the first flange (15) and the second flange (16).

5. The pump for the tooth flushing device according to claim 4, characterized in that the electromagnet (3) is provided with an annular groove at both ends along the axial direction of the piston rod (21), the annular groove extends to the peripheral surface of the electromagnet (3), the first flange (15) and the second flange (16) are at least partially positioned in the annular groove, and the inner ring of the first flange (15) and the second flange (16) is abutted against the groove wall of the annular groove.

6. The pump for a dental irrigator according to claim 4, wherein the first magnet (4) and the first flange (15) have projections in the axial direction of the piston rod (21) that at least partially coincide, the end face of the first flange (15) protruding beyond the end face of the electromagnet (3) or the end face of the first flange (15) being flush with the end face of the electromagnet (3);

the second magnet (5) and the second flange (16) are at least partially overlapped in projection in the axial direction of the piston rod (21), the end face of the second flange (16) protrudes out of the end face of the electromagnet (3), or the end face of the second flange (16) is flush with the end face of the electromagnet (3).

7. Pump for a dental irrigator according to claim 1, characterized in that a seal (7) is connected to the piston head (22), said seal (7) being in sliding abutment with the inner wall of the first chamber (13).

8. Pump for a dental irrigator according to claim 7, characterized in that said seal (7) is a sealing ring which is fitted over the piston head (22) and which protrudes at least partially over the circumference of the piston head (22).

9. The pump for a dental irrigator of claim 8 wherein the piston head (22) has a mounting groove formed on its periphery in which the sealing ring portion is disposed.

10. An irrigator comprising a pump for a dental irrigator according to any one of claims 1 to 9.