CN114452025A

CN114452025A - Tooth flusher

Info

Publication number: CN114452025A
Application number: CN202210220400.8A
Authority: CN
Inventors: 李丐腾
Original assignee: Shanghai Flyco Electrical Appliance Co Ltd
Current assignee: Shanghai Flyco Electrical Appliance Co Ltd
Priority date: 2021-08-31
Filing date: 2022-03-08
Publication date: 2022-05-10

Abstract

The invention provides a tooth flusher, relating to the technical field of oral cavity cleaning, comprising: the device comprises a water inlet joint, a piston cylinder, an elastomer diaphragm structure and a nozzle assembly; the piston cylinder comprises a water inlet cavity, a buffer cavity and a water outlet cavity which are arranged in a separated manner; the water inlet cavity comprises a first opening, and the water outlet end of the water inlet connector is connected with the first opening; the buffer cavity comprises a second opening, and the elastic body diaphragm structure is connected to the second opening in a sealing manner; the water outlet cavity is provided with a third opening, and the water inlet end of the nozzle assembly is connected with the third opening; the water inlet cavity and the buffer cavity are separated by a common water inlet sealing wall, a water inlet is formed in the water inlet sealing wall, and a water inlet one-way valve for sealing the water inlet is arranged on the water inlet sealing wall; the water outlet cavity and the buffer cavity are separated by a common water outlet sealing wall, a water outlet is formed in the water outlet sealing wall, and a water outlet one-way valve used for sealing the water outlet is arranged on the water outlet sealing wall.

Description

Tooth flusher

Technical Field

The invention relates to the technical field of oral cleaning, in particular to a tooth flusher.

Background

The tooth flusher utilizes the water pump to do work and sprays water to teeth, thereby achieving the purpose of cleaning teeth.

The existing tooth flusher has more structural components and complicated connection, and the more components, the higher the probability of water leakage among the components.

Disclosure of Invention

The invention aims to provide a tooth flusher, which is used for relieving the technical problem that the structure of the existing tooth flusher is complicated.

The embodiment of the invention provides a tooth flusher, which comprises: a water inlet joint, a piston cylinder, an elastomer diaphragm structure and a nozzle assembly; the piston cylinder comprises a water inlet cavity, a buffer cavity and a water outlet cavity which are arranged in a separated mode; the water inlet cavity comprises a first opening, and the water outlet end of the water inlet joint is connected with the first opening; the buffer cavity comprises a second opening, and the elastomer diaphragm structure is connected to the second opening in a sealing manner; the water outlet cavity is provided with a third opening, and the water inlet end of the nozzle assembly is connected with the third opening;

the water inlet cavity and the buffer cavity are separated by a common water inlet sealing wall, the water inlet sealing wall is provided with a water inlet communicated with the buffer cavity and the water inlet cavity, and the water inlet sealing wall is provided with a water inlet one-way valve for sealing the water inlet;

the water outlet cavity and the buffer cavity are separated by a common water outlet sealing wall, a water outlet communicated with the buffer cavity and the water outlet cavity is formed in the water outlet sealing wall, and a water outlet one-way valve used for sealing the water outlet is arranged on the water outlet sealing wall.

Furthermore, the check valve of intaking is for connecting the umbrella-type valve of intaking on the sealed wall of intaking, the umbrella-type valve of intaking includes the umbrella face of intaking, the umbrella face of intaking is located the buffer memory cavity is inboard, just the umbrella face of intaking covers the water inlet.

Furthermore, the water outlet one-way valve is a water outlet umbrella-shaped valve connected to the water outlet sealing wall, the water outlet umbrella-shaped valve comprises a water outlet umbrella surface, the water outlet umbrella surface is located on the outer side of the cache cavity, and the water outlet umbrella surface covers the water outlet.

Furthermore, the tooth flusher comprises a push-pull module, the push-pull module is connected with the outer wall of the elastomer membrane structure, and the push-pull module is used for pushing the elastomer membrane structure to move towards the inner side of the cache cavity or pulling the elastomer membrane structure towards the outer side of the cache cavity.

Furthermore, the water inlet sealing wall and the water outlet sealing wall are respectively vertical to the push-pull movement direction of the push-pull module;

the water inlet sealing wall and the water outlet sealing wall form a stepped structure, and the distance between the water inlet sealing wall and the elastomer membrane structure is smaller than the distance between the water outlet sealing wall and the elastomer membrane structure.

Furthermore, the push-pull module comprises an eccentric wheel push-pull module, a linear driving push-pull module or an electromagnetic attraction repulsion module.

Further, the push-pull module comprises a connecting rod and an eccentric wheel mechanism, the connecting rod comprises a first end and a second end, and the first end of the connecting rod is connected with the elastic body diaphragm structure; the second end of the connecting rod is connected with the eccentric wheel mechanism, and the eccentric wheel mechanism is used for driving the connecting rod to perform push-pull reciprocating motion.

Furthermore, the eccentric wheel mechanism comprises a motor, a first gear, a second gear and a fixed shaft, wherein the first gear is connected to an output shaft of the motor, the second gear is an end face gear, the second gear is meshed with the first gear, and the axial direction of the first gear is vertical to the axial direction of the second gear;

one surface of the second gear is provided with an eccentric shaft body protruding outwards, and the axis of the eccentric shaft body is parallel to and spaced from the axis of the second gear; two ends of the fixed shaft are fixed, and the fixed shaft penetrates through the second gear and the eccentric shaft body along the axial direction of the second gear;

the second end of the connecting rod is provided with a sleeve which is sleeved on the outer side of the eccentric shaft body.

Furthermore, an inwards concave groove is formed in the bottom surface of the elastic body membrane structure, an annular limiting edge extending inwards in the radial direction is arranged on the inner wall of the groove, and a first clamping structure is formed by a gap between the annular limiting edge and the bottom surface of the groove;

the push-pull module comprises a connecting part, a first annular surrounding edge and a second annular surrounding edge are arranged on the circumferential outer wall of the connecting part and face the push-pull module direction along the elastic body membrane structure, the first annular surrounding edge and the second annular surrounding edge are sequentially arranged at intervals along the axial direction of the connecting part, and a second clamping structure is formed in a gap between the first annular surrounding edge and the second annular surrounding edge;

the outer diameter of the first annular surrounding edge is larger than the inner diameter of the annular limiting edge, and the first annular surrounding edge is positioned in the first clamping structure; the inner diameter of the annular limiting edge is smaller than the outer diameters of the first annular surrounding edge and the second annular surrounding edge, and the annular limiting edge is located in the second clamping structure.

Further, the thickness of the annular limiting edge is equal to the distance between the first annular surrounding edge and the second annular surrounding edge;

the upper surface of first annular surrounding edge with the up end parallel and level of connecting portion, just the thickness of first annular surrounding edge equals distance between the bottom surface of spacing border of annular and recess.

Further, the outer diameter of the second annular surrounding edge is larger than the inner diameter of the groove.

Furthermore, one surface of the second annular surrounding edge, which faces away from the first annular surrounding edge, is a conical surface, and the diameter of the cross-sectional shape of the conical surface is gradually reduced along the direction from the first annular surrounding edge to the second annular surrounding edge.

Furthermore, the tooth flusher also comprises a lower shell, the push-pull module is positioned in the lower shell, and the edge of the elastic body membrane structure is clamped and fixed between the end surface of the second opening and the top surface of the lower shell.

Furthermore, an annular limiting groove which is sunken towards the inner side of the cache cavity is arranged on the end face of the second opening;

the elastic body diaphragm structure is characterized in that a surrounding edge protruding in the axial direction is arranged at the edge of the elastic body diaphragm structure, and the surrounding edge is located in the annular limiting groove.

Further, the water inlet cavity comprises a guide inclined plane facing the first opening, and the guide inclined plane is used for guiding water flowing out of the water inlet joint to the water inlet sealing wall.

Furthermore, be provided with annular mounting groove on the circumference lateral wall of water supply connector, be provided with the sealing washer in the annular mounting groove, the sealing washer is used for with first open-ended inner wall butt.

Further, the water inlet joint is rotatably connected with the first opening.

Furthermore, be provided with spacing spout on the outer wall of buffer memory cavity, be provided with spacing arch on the circumference outer wall of water supply connector, spacing arch is located in the spacing spout, spacing spout is used for preventing the water supply connector follow the first opening is deviate from.

The embodiment of the invention provides a tooth flusher, which comprises: a water inlet joint, a piston cylinder, an elastomer diaphragm structure and a nozzle assembly; the piston cylinder comprises a water inlet cavity, a buffer cavity and a water outlet cavity which are arranged in a separated mode; the water inlet cavity comprises a first opening, and the water outlet end of the water inlet joint is connected with the first opening; the buffer cavity comprises a second opening, and the elastomer diaphragm structure is connected to the second opening in a sealing manner; the water outlet cavity is provided with a third opening, and the water inlet end of the nozzle assembly is connected with the third opening; the water inlet cavity and the buffer cavity are separated by a common water inlet sealing wall, the water inlet sealing wall is provided with a water inlet communicated with the buffer cavity and the water inlet cavity, and the water inlet sealing wall is provided with a water inlet one-way valve for sealing the water inlet; the water outlet cavity and the buffer cavity are separated by a common water outlet sealing wall, a water outlet communicated with the buffer cavity and the water outlet cavity is formed in the water outlet sealing wall, and a water outlet one-way valve used for sealing the water outlet is arranged on the water outlet sealing wall. In the embodiment, the water inlet cavity, the buffer cavity and the water outlet cavity are formed by separating one piston cylinder, the water inlet cavity and the buffer cavity are separated by the water inlet sealing wall, and the water can be guided by the water inlet and cannot leak at other positions; similarly, the buffer cavity and the water outlet cavity are separated by the water outlet sealing wall, and the other positions except the water outlet can guide the flow without leakage. The water inlet connector, the elastic body membrane structure and the nozzle assembly are respectively connected through one component, so that the connection is simple, and the assembly process is reduced; and the piston cylinder is not provided with other structures communicated with the outside, so that the risk of water leakage is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a piston cylinder of a dental irrigator provided by an embodiment of the invention after detonation;

FIG. 2 is a cross-sectional view of a dental irrigator provided by an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at position A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at position B;

figure 5 is a cross-sectional view of a linkage and elastomeric diaphragm structure of a dental irrigator according to an embodiment of the invention after explosion.

Icon: 100-water inlet joint; 200-a piston cylinder; 210-a water inlet cavity; 220-cache cavity; 230-a water outlet cavity; 240-water inlet sealing wall; 241-a water inlet; 250-water outlet sealing wall; 251-a water outlet; 260-annular limiting groove; 270-a guide ramp; 280-limit sliding chutes; 300-elastomeric membrane structure; 310-annular stop edge; 320-a first clamping structure; 400-a nozzle assembly; 510-water inlet umbrella valve; 520-water outlet umbrella valve; 600-a push-pull module; 610-a motor; 620-a first gear; 630-a second gear; 640-an eccentric shaft body; 650-a fixed shaft; 660-connecting rod; 661-a first annular skirt; 662-a second annular skirt; 6621-conical surface; 663-a second clamping structure; 670-a sleeve; 700-lower shell.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, a dental irrigator according to an embodiment of the present invention includes: water inlet fitting 100, piston cylinder 200, elastomeric diaphragm structure 300, and nozzle assembly 400; the piston cylinder 200 comprises an inlet cavity 210, a buffer cavity 220 and an outlet cavity 230 which are arranged separately from each other.

The water inlet cavity 210 comprises a first opening, the first opening may be located on the left side of the piston cylinder 200, the water outlet end of the water inlet joint 100 is connected with the first opening, and external water enters the water inlet cavity 210 through the water inlet joint 100.

The buffer cavity 220 comprises a second opening, the second opening is located at the bottom of the piston cylinder 200, the elastomer diaphragm structure 300 is connected to the second opening in a sealing mode, and after the elastomer diaphragm structure 300 moves towards the inside or the outside of the buffer cavity 220, the volume of the buffer cavity 220 can be changed, so that the pressure in the buffer cavity 220 is changed, and the water inlet check valve and the water outlet check valve are opened and closed.

The water outlet cavity 230 is provided with a third opening, the third opening is positioned at the upper end of the piston cylinder 200, the water inlet end of the nozzle assembly 400 is connected with the third opening, and water in the buffer cavity 220 passes through the water outlet cavity 230 and then is sprayed out of the spray assembly.

The water inlet cavity 210 and separate through shared water inlet sealed wall 240 between the buffer memory cavity 220, water inlet sealed wall 240 arranges along the horizontal plane, just be provided with the water inlet 241 that communicates buffer memory cavity 220 and water inlet cavity 210 on the water inlet sealed wall 240, be provided with the check valve that intakes that is used for sealed water inlet 241 on the water inlet sealed wall 240, when the pressure in buffer memory cavity 220 is less than ambient pressure, the check valve that intakes opens, and the water in the water inlet cavity 210 flows into in the buffer memory cavity 220.

The water outlet cavity 230 and the buffer cavity 220 are separated by a common water outlet sealing wall 250, a water outlet 251 for communicating the buffer cavity 220 and the water outlet cavity 230 is arranged on the water outlet sealing wall 250, a water outlet check valve for sealing the water outlet 251 is arranged on the water outlet sealing wall 250, when the pressure in the buffer cavity 220 is higher than the external pressure, the water outlet check valve is opened, and the water in the buffer cavity 220 flows into the water outlet cavity 230.

In this embodiment, a water inlet cavity 210, a buffer cavity 220 and a water outlet cavity 230 are respectively formed by one piston cylinder 200, the water inlet cavity 210 and the buffer cavity 220 are separated by a water inlet sealing wall 240, and no leakage is generated at other positions except for the water inlet 241 for guiding flow; similarly, the buffer cavity 220 and the outlet cavity 230 are separated by the outlet sealing wall 250, and no leakage occurs at any other position except the outlet 251. The water inlet connector 100, the elastomer membrane structure 300 and the nozzle assembly 400 are connected through one component, so that the connection is simple, and the assembly process is reduced; and other structures communicated with the outside do not exist in the piston cylinder 200, so that the risk of water leakage is reduced.

The check valve of intaking is for connecting the umbrella-type valve 510 of intaking on the sealed wall 240 of intaking, the umbrella-type valve 510 of intaking includes the umbrella face of intaking, the umbrella face of intaking is located buffer memory cavity 220 is inboard, just the umbrella face of intaking covers water inlet 241. Specifically, umbrella-type valve 510 that intakes includes the umbrella face of intaking and the umbrella pole of intaking, and the umbrella pole of intaking is connected with water seal wall 240, the umbrella face of intaking is located cache cavity 220 is inboard, just it covers to intake the umbrella face water inlet 241, the umbrella face of intaking has elasticity, can be close to or keep away from water seal wall 240 under the effect of pressure to realize opening and closing of water inlet 241. The number of the water inlets 241 can be multiple, the water inlets 241 are arranged around the water inlet umbrella rod, and water in the water inlet cavity 210 can uniformly enter the buffer cavity 220.

The water outlet one-way valve is a water outlet umbrella-shaped valve 520 connected to the water outlet sealing wall 250, the water outlet umbrella-shaped valve 520 comprises a water outlet umbrella surface, the water outlet umbrella surface is located at the outer side of the cache cavity 220, and the water outlet umbrella surface covers the water outlet 251. Specifically, go out water umbrella valve 520 includes a water umbrella face and a water umbrella pole, and a water umbrella pole is connected with a water seal wall 250, a water umbrella face is located the buffer memory cavity 220 outside, just it covers to go out the water umbrella face water outlet 251, a water umbrella face has elasticity, can be close to or keep away from a water seal wall 250 under the effect of pressure to realize opening and closing of water outlet 251. The number of the water outlets 251 can be multiple, the multiple water outlets 251 are arranged around the water outlet umbrella rod, and water in the buffer cavity 220 can uniformly enter the water outlet cavity 230.

The tooth flusher comprises a push-pull module 600, the push-pull module 600 is connected with the outer wall of the elastomer diaphragm structure 300, and the push-pull module 600 is used for pushing the elastomer diaphragm structure 300 to move towards the inner side of the buffer cavity 220 or pulling the elastomer diaphragm structure 300 towards the outer side of the buffer cavity 220.

The push-pull assembly is used for performing reciprocating push-pull movement on the elastomer membrane structure 300, when the push-pull mechanism pulls the elastomer membrane structure 300 from inside to outside, the elastomer membrane structure 300 can be deformed towards the outside of the cache cavity 220, the volume inside the cache cavity 220 is increased, and outside water can enter the cache cavity 220 from the water inlet 241 through the water inlet one-way valve structure; when the push-pull mechanism pushes the elastomer membrane structure 300 from outside to inside, the elastomer membrane structure 300 can deform toward the inside of the buffer cavity 220, so that the volume inside the buffer cavity 220 is reduced, and outside water can be ejected from the water outlet 251 through the water outlet one-way valve structure. In this embodiment, the elastic body diaphragm structure 300 with a certain deformation amount is used to change the volume of the buffer cavity 220, so as to change the pressure in the buffer cavity 220, thereby realizing the water pumping and spraying actions of the buffer cavity 220. The push-pull mechanism is located on the outer side of the cache cavity 220, the overall sealing performance of the cache cavity 220 is better, and the service life of the tooth flusher is prolonged.

The water inlet sealing wall 240 and the water outlet sealing wall 250 are respectively perpendicular to the push-pull movement direction of the push-pull module 600; the water inlet sealing wall 240 and the water outlet sealing wall 250 form a stepped structure, and the distance between the water inlet sealing wall 240 and the elastomer membrane structure 300 is smaller than the distance between the water outlet sealing wall 250 and the elastomer membrane structure 300.

The push-pull assembly pushes and pulls the elastomer membrane structure 300, and the deformation direction of the elastomer membrane structure 300 is perpendicular to the water inlet sealing wall 240 and the water outlet sealing wall 250, so that the pressure can be directly transmitted to the water inlet umbrella-shaped valve 510 and the water outlet umbrella-shaped valve 520 through water, and the sensitivity of the water inlet umbrella-shaped valve 510 and the water outlet umbrella-shaped valve 520 is high. The water flowing into the buffer cavity 220 from the water inlet 241 can enter the lower part of the water outlet sealing wall 250, because the distance between the water outlet sealing wall 250 and the elastomer membrane structure 300 is relatively far, more water can be stored, and when the pressure in the buffer cavity 220 is increased, the sufficient water yield per time is ensured.

The push-pull module 600 includes an eccentric wheel push-pull module, a linear driving push-pull module, or an electromagnetic attraction repulsion module. The linear driving push-pull module can be a linear motor, and the movable end of the linear motor is connected with the elastic body membrane structure 300; the electromagnetic attraction and repulsion module can comprise an electromagnet with changeable polarity and a permanent magnet, wherein the permanent magnet is connected to the elastic body membrane structure 300, and the purpose of attracting and repelling the permanent magnet is achieved by periodically changing the polarity of the electromagnet.

The push-pull module 600 comprises a connecting rod 660 and an eccentric wheel mechanism, wherein the connecting rod 660 comprises a first end and a second end, and the first end of the connecting rod 660 is connected with the elastomer membrane structure 300; the second end of the connecting rod 660 is connected with the eccentric wheel mechanism, and the eccentric wheel mechanism is used for driving the connecting rod 660 to perform push-pull reciprocating motion. When the eccentric wheel structure in the eccentric wheel mechanism rotates, the connecting rod 660 can be driven to perform push-pull reciprocating motion, and the faster the rotating speed is, the higher the deformation frequency of the elastic body membrane structure 300 is, so that the water outlet 251 generates a high-frequency water spraying effect.

As shown in fig. 4, the eccentric mechanism includes a motor 610, a first gear 620, a second gear 630 and a fixed shaft 650, the first gear 620 is connected to an output shaft of the motor 610, the second gear 630 is a face gear, the second gear 630 is engaged with the first gear 620, and an axial direction of the first gear 620 is perpendicular to an axial direction of the second gear 630; an eccentric shaft body 640 protruding outwards is arranged on one surface of the second gear 630, and the axis of the eccentric shaft body 640 is parallel to and spaced from the axis of the second gear 630; both ends of the fixed shaft 650 are fixed, and the fixed shaft 650 penetrates the second gear 630 and the eccentric shaft body 640 along the axial direction of the second gear 630; the second end of the connecting rod 660 is provided with a sleeve 670, and the sleeve 670 is sleeved on the outer side of the eccentric shaft body 640.

The eccentric mechanism is located below the elastomeric diaphragm structure 300, and the axial direction of the output shaft of the motor 610 is parallel to the length direction of the device. And a second gear 630 is vertically placed with its end surface facing the side of the device for transmitting the torque of the motor 610. The device comprises a lower shell 700, two ends of a fixed shaft 650 are respectively and fixedly connected to two opposite inner side surfaces of the lower shell 700, when the second gear 630 rotates around the fixed shaft 650, the axis of an eccentric shaft body 640 on the second gear 630 rotates eccentrically to drive a sleeve sleeved on the eccentric shaft body 640 to reciprocate vertically, so that the first end of the connecting rod 660 can push and pull the elastomer membrane structure 300, the transmission of the power of the motor 610 is realized by utilizing the first gear 620, the second gear 630 and the fixed shaft 650, the structure is simple, the design is ingenious, the occupied space is small, and the volume of the device can be smaller.

As shown in fig. 5, a groove recessed into the buffer cavity 220 is disposed on a bottom surface of the elastic membrane structure 300, an annular limiting edge 310 extending radially inward is disposed on an inner wall of the groove, and a first clamping structure 320 is formed by a gap between the annular limiting edge 310 and the bottom surface of the groove. Because the elastomeric diaphragm structure 300 is resilient, the annular retaining rim 310 can open under external forces.

Push-and-pull module 600 includes connecting portion, be provided with first annular surrounding edge 661 and second annular surrounding edge 662 on the circumference outer wall of connecting portion, follow elastomer diaphragm structure 300 is towards push-and-pull module 600 direction, first annular surrounding edge 661 and second annular surrounding edge 662 follow the axial direction of connecting portion sets up at intervals in proper order, the clearance between first annular surrounding edge 661 and the second annular surrounding edge 662 forms second joint structure 663.

During assembly, the annular limiting edge 310 is deformed by an external force, so that the inner diameter of the annular limiting edge 310 is enlarged, and the first annular enclosing edge 661 is inserted into the first clamping structure 320. The outer diameter of the first annular surrounding edge 661 is larger than the inner diameter of the annular limiting edge 310, and the first annular surrounding edge 661 is located in the first clamping structure 320; the inner diameter of the annular limiting edge 310 is smaller than the outer diameter of the first annular surrounding edge 661 and the outer diameter of the second annular surrounding edge 662, and the annular limiting edge 310 is located in the second clamping structure 663. Driven by the push-pull module 600, when the connecting portion moves downward, the first annular surrounding edge 661 can pull the annular limiting edge 310 and make the elastic diaphragm structure 300 bend and deform downward, so that the volume of the buffer cavity 220 is enlarged, the pressure in the buffer cavity 220 is reduced, and the water inlet check valve is opened. Under the drive of push-pull module 600, when connecting portion move up, first annular surrounding edge 661 and second annular surrounding edge 662 can push elastomer diaphragm structure 300 bending deformation upwards to reduced the volume of buffer memory cavity 220, the pressure increase in buffer memory cavity 220, the check valve that goes out water opens. The connection portion of elastomer diaphragm structure 300 and push-and-pull module 600 is mutually clamped through first clamping structure 320 and second clamping structure 663, the two form a mutual restriction relation, in the push-and-pull module 600 push-and-pull process, elastomer diaphragm structure 300 and push-and-pull module 600 are not easy to separate, the connection strength of elastomer diaphragm structure 300 and push-and-pull module 600 is high, and the normal operation of push-and-pull module 600 driving elastomer diaphragm structure 300 is ensured.

The thickness of the annular retaining rim 310 is equal to the distance between the first and second

annular rims

661, 662; the upper surface of first annular surrounding edge 661 with the up end parallel and level of connecting portion, just the thickness of first annular surrounding edge 661 equals distance between the bottom surface of annular spacing border 310 and recess.

The upper and lower surface of annular spacing border 310 hugs closely with first annular surrounding edge 661 and second annular surrounding edge 662 respectively, and the upper and lower surface of first annular surrounding edge 661 hugs closely with the bottom surface of annular spacing border 310 and recess respectively, and during the connecting portion motion, the action can be transmitted immediately for elastomer diaphragm structure 300, and the action uniformity of connecting portion and elastomer diaphragm structure 300 is high.

The outer diameter of the second annular surrounding edge 662 is larger than the inner diameter of the groove, the second annular surrounding edge 662 is supported on the lower surface of the elastomer membrane structure 300, and when the connecting portion moves upwards, the second annular surrounding edge 662 can evenly apply thrust to the lower surface of the elastomer membrane structure 300, so that the annular limiting edge 310 is prevented from being broken due to the fact that only thrust is applied to the annular limiting edge 310.

The surface of the second annular surrounding edge 662 facing away from the first annular surrounding edge 661 is a tapered surface 6621, and the diameter of the cross-sectional shape of the tapered surface 6621 gradually decreases along the direction from the first annular surrounding edge 661 to the second annular surrounding edge 662. The second annular surrounding edge 662 pushes the elastomer membrane structure 300 upwards and simultaneously receives the reaction force of the elastomer membrane structure 300, and the second annular surrounding edge 662 which is of a conical structure is high in structural stability and not easy to break.

The dental irrigator further comprises a lower shell 700, the push-pull module 600 is located in the lower shell 700, and the edge of the elastomer membrane structure 300 is clamped and fixed by the end surface of the second opening and the top surface of the lower shell 700. The lower housing 700 and the piston cylinder 200 may be connected by screws, and the portion of the elastomeric diaphragm structure 300 compressed between the lower housing 700 and the piston cylinder 200 may form a sealing structure between the lower housing 700 and the piston cylinder 200, reducing water leakage.

An annular limiting groove 260 which is sunken towards the inner side of the cache cavity 220 is formed in the end face of the second opening; the edge of the elastic body diaphragm structure 300 is provided with a surrounding edge protruding along the axial direction, and the surrounding edge is located in the annular limiting groove 260. When the end surfaces of the piston cylinder 200 and the lower housing 700 are butted, the skirt on the elastomeric diaphragm structure 300 may be restrained in the annular restraining groove 260, thereby preventing the elastomeric diaphragm structure 300 from moving in its radial direction.

The inlet chamber 210 includes a guide slope 270 facing the first opening, and the guide slope 270 is used to guide the water flowing out from the inlet connector 100 to the inlet sealing wall 240. When the water inlet check valve is opened, the water flowing from the water inlet connector 100 and impacting on the guide slope 270 moves toward the water inlet sealing wall 240 and enters the buffer cavity 220 through the water inlet 241. Under the effect of direction inclined plane 270, can make the impact force of rivers turn to into water sealed wall 240, and can not the reverse impact to water supply connector 100 and first open-ended junction, and then reduced the condition that water leakage was leaked in water supply connector 100 and buffer cavity 220 junction, can reduce the sealed requirement between water supply connector 100 and the buffer cavity 220 simultaneously.

The water inlet joint is characterized in that an annular mounting groove is formed in the circumferential side wall of the water inlet joint 100, a sealing ring is arranged in the annular mounting groove and used for being abutted to the inner wall of the first opening, and the sealing performance between the water inlet joint 100 and the first opening is further improved.

In order to adapt the water inlet joint 100 to different use scenarios, the water inlet joint 100 is rotatably connected to the first opening, that is, the water inlet joint 100 can rotate around the buffer cavity 220, so that the inlet orientation of the water inlet joint 100 changes.

In order to avoid water inlet joint 100 to separate with buffer memory cavity 220 when rotating, be provided with spacing spout 280 on buffer memory cavity 220's the outer wall, be provided with spacing arch on water inlet joint 100's the circumference outer wall, spacing arch is located in spacing spout 280, spacing spout 280 is used for stopping water inlet joint 100 follows first opening is deviate from.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dental irrigator, comprising: a water inlet joint (100), a piston cylinder (200), an elastomeric diaphragm structure (300), and a nozzle assembly (400); the piston cylinder (200) comprises a water inlet cavity (210), a buffer cavity (220) and a water outlet cavity (230) which are arranged in a separated mode; the water inlet cavity (210) comprises a first opening, and the water outlet end of the water inlet joint (100) is connected with the first opening; the buffer cavity (220) comprises a second opening, and the elastomer diaphragm structure (300) is connected to the second opening in a sealing manner; the water outlet cavity (230) is provided with a third opening, and the water inlet end of the nozzle assembly (400) is connected with the third opening;

the water inlet cavity (210) and the buffer cavity (220) are separated by a common water inlet sealing wall (240), the water inlet sealing wall (240) is provided with a water inlet (241) for communicating the buffer cavity (220) and the water inlet cavity (210), and the water inlet sealing wall (240) is provided with a water inlet one-way valve for sealing the water inlet (241);

the water outlet cavity (230) and the buffer cavity (220) are separated by a common water outlet sealing wall (250), a water outlet (251) which is communicated with the buffer cavity (220) and the water outlet cavity (230) is arranged on the water outlet sealing wall (250), and a water outlet one-way valve which is used for sealing the water outlet (251) is arranged on the water outlet sealing wall (250).

2. A dental irrigator according to claim 1, wherein the water inlet check valve is a water inlet umbrella valve (510) connected to the water inlet sealing wall (240), the water inlet umbrella valve (510) comprising a water inlet umbrella cover, the water inlet umbrella cover being located inside the buffer chamber (220), and the water inlet umbrella cover covering the water inlet (241).

3. A dental irrigator according to claim 2, wherein the outlet check valve is an outlet umbrella valve (520) connected to the outlet sealing wall (250), the outlet umbrella valve (520) comprising an outlet umbrella cover located outside the buffer chamber (220) and covering the outlet (251).

4. A dental irrigator according to claim 3, wherein the dental irrigator comprises a push-pull die set (600), the push-pull die set (600) being connected to an outer wall of the elastomeric membrane structure (300), the push-pull die set (600) being adapted to push the elastomeric membrane structure (300) towards the inside of the buffer cavity (220) or to pull the elastomeric membrane structure (300) towards the outside of the buffer cavity (220).

5. A dental irrigator according to claim 4, wherein the water inlet sealing wall (240) and the water outlet sealing wall (250) are respectively perpendicular to the direction of the push-pull movement of the push-pull module (600);

the water inlet sealing wall (240) and the water outlet sealing wall (250) form a stepped structure, and the distance between the water inlet sealing wall (240) and the elastomer membrane structure (300) is smaller than the distance between the water outlet sealing wall (250) and the elastomer membrane structure (300).

6. A dental irrigator according to claim 4, wherein the push-pull die set (600) comprises an eccentric push-pull die set, a linear drive push-pull die set or an electromagnetic attractive-repulsive die set.

7. A dental irrigator according to claim 6, wherein the push-pull die set (600) comprises a connecting rod (660) and an eccentric mechanism, the connecting rod (660) comprising a first end and a second end, the first end of the connecting rod (660) being connected to the elastomeric membrane structure (300); the second end of the connecting rod (660) is connected with the eccentric wheel mechanism, and the eccentric wheel mechanism is used for driving the connecting rod (660) to perform push-pull reciprocating motion.

8. The dental irrigator of claim 7, wherein the eccentric mechanism comprises a motor (610), a first gear (620), a second gear (630) and a fixed shaft (650), the first gear (620) is connected to an output shaft of the motor (610), the second gear (630) is a face gear, the second gear (630) is engaged with the first gear (620), and an axial direction of the first gear (620) is perpendicular to an axial direction of the second gear (630);

one surface of the second gear (630) is provided with an eccentric shaft body (640) protruding outwards, and the axis of the eccentric shaft body (640) is parallel to and spaced from the axis of the second gear (630); both ends of the fixed shaft (650) are fixed, and the fixed shaft (650) penetrates the second gear (630) and the eccentric shaft body (640) along the axial direction of the second gear (630);

the second end of connecting rod (660) is provided with sleeve (670), sleeve (670) cup joint in the outside of eccentric axis body (640).

9. A dental irrigator according to claim 4, wherein the bottom surface of the elastomeric membrane structure (300) is provided with an inwardly recessed groove, the inner wall of the groove is provided with an annular retaining rim (310) extending radially inwardly, and the gap between the annular retaining rim (310) and the bottom surface of the groove forms a first snap-fit structure (320);

the push-pull module (600) comprises a connecting part, a first annular surrounding edge (661) and a second annular surrounding edge (662) are arranged on the circumferential outer wall of the connecting part, the first annular surrounding edge (661) and the second annular surrounding edge (662) are sequentially arranged at intervals along the axial direction of the connecting part towards the push-pull module (600) along the elastomer membrane structure (300), and a second clamping structure (663) is formed by a gap between the first annular surrounding edge (661) and the second annular surrounding edge (662);

the outer diameter of the first annular surrounding edge (661) is larger than the inner diameter of the annular limiting edge (310), and the first annular surrounding edge (661) is located in the first clamping structure (320); the inner diameter of the annular limiting edge (310) is smaller than the outer diameters of the first annular surrounding edge (661) and the second annular surrounding edge (662), and the annular limiting edge (310) is located in the second clamping structure (663).

10. A dental irrigator according to claim 9, wherein the annular stop rim (310) has a thickness equal to the distance between the first and second annular rims (661, 662);

the upper surface of first annular surrounding edge (661) with the up end parallel and level of connecting portion, just the thickness of first annular surrounding edge (661) equals the distance between the bottom surface of annular spacing border (310) and recess.

11. A dental irrigator according to claim 9, wherein the second annular skirt (662) has an outer diameter greater than an inner diameter of the recess.

12. A dental irrigator according to claim 9, wherein a face of the second annular skirt (662) facing away from the first annular skirt (661) is a tapered face (6621), and the diameter of the cross-sectional shape of the tapered face (6621) decreases in a direction from the first annular skirt (661) towards the second annular skirt (662).

13. A dental irrigator according to claim 4, further comprising a lower housing (700), wherein the push-pull die set (600) is located inside the lower housing (700), and wherein the end face of the second opening clamps the rim of the elastomeric membrane structure (300) with the top surface of the lower housing (700).

14. A dental irrigator according to claim 13, wherein the end face of the second opening is provided with an annular retaining groove (260) which is recessed inwardly of the buffer chamber (220);

the elastic body diaphragm structure is characterized in that a surrounding edge protruding in the axial direction is arranged at the edge of the elastic body diaphragm structure (300), and the surrounding edge is located in the annular limiting groove (260).

15. A dental irrigator according to claim 14, wherein the inlet chamber (210) comprises a guide ramp (270) towards the first opening, the guide ramp (270) being adapted to guide water flowing out of the inlet fitting (100) towards the inlet sealing wall (240).

16. A dental irrigator according to claim 1, wherein the circumferential side wall of the water inlet fitting (100) is provided with an annular mounting groove in which is disposed a sealing ring for abutment with the inner wall of the first opening.

17. A dental irrigator according to claim 16, wherein the water inlet fitting (100) is rotatably connected to the first opening.

18. A tooth flusher according to claim 17, wherein a limiting sliding groove (280) is formed in an outer wall of the buffer cavity (220), a limiting protrusion is formed in a circumferential outer wall of the water inlet joint (100), the limiting protrusion is located in the limiting sliding groove (280), and the limiting sliding groove (280) is used for preventing the water inlet joint (100) from being separated from the first opening.