CN217270657U - Water pump of tooth flushing device and tooth flushing device - Google Patents

Abstract

The utility model discloses a towards tooth ware water pump and towards tooth ware, including the pump body, go out water connecting piece and play water control piece, the pump body is equipped with the delivery port and goes out water installation counter bore, go out water connecting piece fixed mounting in go out in the water installation counter bore, go out the water channel seted up to the water connecting piece, go out the water channel with the inner chamber of the pump body passes through the delivery port intercommunication, go out the water control piece install in the pump body, it includes casing and lower casing to go out the water control piece, down the casing install in the delivery port, just stretch out down casing upper end the delivery port has seted up the entry, down the casing lower extreme seted up with the export of delivery port intercommunication, this towards tooth ware water pump and towards tooth ware can avoid the air to get into pump body inner chamber via the gap of extraction nozzle department.

Description

Water pump of tooth flushing device and tooth flushing device

Technical Field

The utility model relates to a towards tooth ware technical field, especially relate to a towards tooth ware water pump and towards tooth ware.

Background

The tooth flusher is a household oral cavity cleaning device, and the working principle of the tooth flusher is that tooth is flushed by pulse water flow so as to remove dental plaque and food remained below a gum line. The tooth flusher in the market generally drives a piston type reciprocating water pump through a motor, and the motor drives an eccentric wheel to rotate at a high speed so as to drive a piston to reciprocate up and down to realize the periodic change of the volume of an inner cavity of a pump body, so that the pump body alternately sucks and sprays water flow (pulse water flow) to flush teeth and tooth gaps. The internal structure and working principle of the tooth rinsing device in the prior art can refer to the Chinese patent CN (208823022) U.

The pump body is provided with a water inlet and a water outlet, the water inlet is provided with a water inlet valve plate, and the water outlet is provided with a water outlet valve plate. Compared with a duckbill valve and a ball valve, the valve block is light, flexible, easy to use, free to open, capable of bearing reverse high pressure, and small in resistance loss before and after liquid flows through the valve block, and is suitable for a piston type reciprocating water pump of a tooth flushing device. However, when the valve plate is opened, the valve plate is impacted by high-speed and high-pressure water flow to be opened, and when the valve plate is closed, the valve plate needs to bear water pressure (or air pressure), that is, two sides of the valve plate are alternately subjected to thrust, so that the valve plate is easy to deform, especially a water outlet valve plate. When the outlet valve plate deforms, the elastic recovery capability of the outlet valve plate is poor, so that in the process (water inlet process) of increasing the inner volume of the pump body, the outlet valve plate cannot perfectly cover the water outlet, a gap is left at the water outlet, the sealing effect of the position is poor, air can enter the inner cavity of the pump body through the gap at the water outlet in the water inlet process, the inner cavity of the pump body cannot form enough low pressure, the flow pumped in the single water inlet process is insufficient, the flow of single water outlet is insufficient, and the normal use of the tooth flushing device is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a water pump of a tooth flushing device, which can avoid the air from entering the inner cavity of the pump body through the gap of the water pumping port.

The second purpose of the utility model is to provide a tooth-washing device.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a water pump of a tooth flushing device comprises a pump body, a water outlet connecting piece and a water outlet control piece, wherein the pump body is provided with a water outlet and a water outlet mounting counter bore, the water outlet connecting piece is fixedly installed in the water outlet mounting counter bore, the water outlet connecting piece is provided with a water outlet channel, the water outlet channel is communicated with an inner cavity of the pump body through the water outlet, the water outlet control piece is installed in the pump body, the water outlet control piece comprises an upper shell and a lower shell, the lower shell is installed in the water outlet, the upper end of the lower shell extends out of the water outlet and is provided with an inlet, the lower end of the lower shell is provided with an outlet communicated with the water outlet, a pressing rod, a rotating shaft and a spring are installed in the upper shell, a driving plate, a movable valve plate and a fixed valve plate are installed in the lower shell, the driving plate and the rotating shaft are circumferentially clamped, clamping teeth are arranged on the rotating shaft, and a driving inclined plane is arranged at the bottom of the pressing rod, the gear sleeve is arranged in the upper shell in a split mode, the gear sleeve is circumferentially clamped with the upper shell, the pressing rod and the rotating shaft are inserted into the gear sleeve, the inner wall of the gear sleeve is provided with a guide groove, the clamping teeth are in sliding fit in the guide groove, and the guide inclined plane is formed in the lower end of the gear sleeve.

Furthermore, the water pump of the tooth flushing device comprises a water inlet connecting piece and a water inlet valve plate, the pump body comprises a water inlet and a water inlet mounting counter bore, the water inlet connecting piece is fixedly arranged in the water inlet mounting counter bore and is provided with a water inlet channel, the water inlet channel is communicated with the inner cavity of the pump body through the water inlet, a second arc-shaped slot is arranged inside the water inlet valve plate, the second arc-shaped groove divides the water inlet valve plate into a water inlet valve plate movable part and a water inlet valve plate fixed part, a water inlet avoiding pit is arranged in the middle of the bottom end of the water inlet mounting counter bore, the fixed part of the water inlet valve piece is clamped by the bottom wall of the water inlet connecting piece and the bottom end edge of the water inlet mounting counter bore together, the water inlet valve piece moving part covers the water outlet hole of the water inlet channel, and the water inlet avoiding pit is used for avoiding the water inlet valve piece moving part.

Furthermore, a piston is arranged in the pump body, a metal sheath is fixedly arranged on the inner wall of the cavity of the pump body, and the piston is slidably matched with the metal sheath.

Further, the lateral wall of piston has been seted up the installation annular, be equipped with Y type sealing washer in the installation annular, the piston with metal sheath clearance fit, Y type sealing washer with metal sheath interference fit.

Further, this application includes core support, motor, eccentric wheel and connecting rod, the top of connecting rod with the piston is articulated, pump body rigid coupling in the core support, the eccentric wheel rotationally locates in the core support, the top of connecting rod with the piston is articulated, the bottom of connecting rod is equipped with adapter sleeve, adapter sleeve rotationally overlaps and locates on the eccentric wheel, the motor is used for the drive the eccentric wheel rotates.

Further, this application includes the flexible sealing cover, the top edge of flexible sealing cover with pump body bottom sealing connection, the bottom edge of flexible sealing cover with connecting rod sealing connection, thereby the lower part of the pump body forms a drainage chamber, the flexible sealing cover is equipped with the outlet, the outlet connection has drainage pipe, drainage pipe passes through the outlet with drainage chamber intercommunication.

Furthermore, the lower end of the rotating shaft is provided with a jack, the upper end of the drive plate is provided with an inserted link, the inserted link is circumferentially clamped in the jack, and the lower end in the upper shell is provided with a clamping groove.

Furthermore, the inner wall of the upper shell is provided with a limiting clamping block, the outer wall of the gear sleeve is provided with a limiting groove hole, and the limiting clamping block is inserted into or clamped into the limiting groove hole.

Furthermore, a positioning groove is further formed in the inner wall of the gear sleeve, a positioning block is arranged on the outer side of the pressing rod, and the positioning block is arranged in the positioning groove in a sliding mode.

The second purpose of the utility model is realized by adopting the following technical scheme:

a tooth flusher, which comprises the water pump of the tooth flusher.

Compared with the prior art, the beneficial effects of the utility model reside in that:

this application is through setting up out water control spare at the delivery port to can effective shutoff delivery port, avoid the in-process of intaking, the air can get into pump body inner chamber via the gap of delivery port department, make pump body inner chamber can not form sufficient low pressure, lead to the single process of intaking to take out not enough, and then lead to the flow of single play water not enough, the influence is towards the normal use of tooth ware

Drawings

FIG. 1 is a schematic view of the internal structure of a tooth rinsing device of the present invention;

FIG. 2 is a partial view of FIG. 1;

FIG. 3 is a schematic structural view of a water pump of the tooth rinsing device of the present invention;

FIG. 4 is a schematic view of the internal structure of a water pump of the tooth rinsing device of the present invention;

FIG. 5 is a view of the internal structure of a water pump outlet control member of the dental irrigator of the present invention;

FIG. 6 is an exploded view of a water pump outlet control member of the dental irrigator of the present invention;

FIG. 7 is an exploded view of the water pump movable valve plate and the fixed valve plate of the water toothpick of the present invention;

FIG. 8 is a schematic circumferential cross-sectional view of the upper housing and the tooth sleeve of the water pump of the tooth flusher of the present invention;

FIG. 9 is a view showing the internal structure of the upper housing of the water pump of the tooth rinsing device of the present invention;

FIG. 10 is a schematic structural view of a lower housing of a water pump of the tooth rinsing device of the present invention;

FIG. 11 is a schematic structural view of a water pump sleeve of the tooth rinsing device of the present invention;

fig. 12 is a schematic structural view of a water pump pressing rod of the tooth rinsing device of the present invention;

fig. 13 is a schematic structural view of a water pump driving plate of the tooth flushing device of the present invention;

fig. 14 is a schematic structural view of the water pump rotating shaft of the tooth rinsing device of the present invention.

The figure is as follows: 1. a pump body; 11. a water outlet; 12. mounting a counter bore in the effluent; 13. a water inlet; 14. mounting counter bores in the water inlet; 141. water inflow avoiding pits; 15. a metal sheath; 16. a water drainage pipeline; 21. a water outlet connector; 211. a water outlet channel; 3. a water outlet control member; 31. an upper housing; 311. a pressing lever; 3111. positioning blocks; 3112. a drive ramp; 312. a rotating shaft; 3121. clamping teeth; 313. a spring; 314. a gear sleeve; 3141. a contact surface; 3142. a guide groove; 3143. positioning a groove; 3144. a guide slope; 315. a limiting part; 32. a lower housing; 321. an outlet; 322. an inlet; 37. a drive plate; 371. inserting a rod; 372. a claw; 38. a movable valve plate; 381. a groove; 39. a fixed valve plate; 391. a bump; 41. a water inlet connector; 411. a water inlet channel; 42. a water inlet valve plate; 5. a piston; 51. mounting a ring groove; 52. a Y-shaped seal ring; 6. a movement bracket; 61. a motor; 7. an eccentric wheel; 8. a connecting rod; 81. a connecting sleeve; 9. a flexible sealing sleeve.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1-14, the present application discloses a tooth rinsing device, which comprises a water pump of the tooth rinsing device, and comprises a pump body 1, a water outlet connector 21 and a water outlet control member 3, wherein the pump body 1 is provided with a water outlet 11 and a water outlet mounting counterbore 12, the water outlet connector 21 is fixedly mounted in the water outlet mounting counterbore 12, the water outlet connector 21 is provided with a water outlet passage 211, the water outlet passage 211 is communicated with an inner cavity of the pump body 1 through the water outlet 11, the water outlet control member 3 is mounted in the pump body 1, the water outlet control member 3 comprises an upper shell 31 and a lower shell 32, the lower shell 32 is mounted in the water outlet 11, the upper end of the lower shell 32 extends out of the water outlet 11 and is provided with an inlet 322, the lower end of the lower shell 32 is provided with an outlet 321 communicated with the water outlet 11, the upper shell 31 is internally provided with a pressing rod 311, a rotating shaft 312, a spring 313 and a tooth sleeve 314 which is separately arranged with the upper shell 31, the tooth sleeve 314 is mounted in the upper shell 31, a through hole is arranged in the gear sleeve 314, the pressing rod 311 and the rotating shaft 312 are inserted in the through hole, and the upper end of the pressing rod 311 extends out of the gear sleeve 314 and the top of the upper shell 31. The rotating shaft 312 is installed below the pressing rod 311, the lower end of the pressing rod 311 abuts against the upper end of the spring 313, the lower end of the spring 313 abuts against the upper surface of the lower shell 32, and the upper shell 31 is fixed in the pump body 1.

The inner wall of the upper shell 31 is provided with limiting parts 315, the limiting parts 315 are axially arranged along the upper shell 31, the number of the limiting parts 315 is eight, the two limiting parts 315 are in a group and divided into four groups, the circumferences of the limiting parts are uniformly distributed on the inner wall of the upper shell 31, and the limiting parts 315 in the same group are coplanar. The outer side surface of the gear sleeve 314 is provided with four abutting surfaces 3141, and the abutting surfaces 3141 are also arranged along the axial direction of the upper shell 31. After the gear sleeve 314 is installed, the abutting surface 3141 abuts against the limiting portion 315, so that the gear sleeve 314 is prevented from rotating in the circumferential direction inside the upper shell 31.

The inner wall of the gear sleeve 314 is provided with a guide groove 3142 and a positioning groove 3143, the depth of the guide groove 3142 is larger than that of the positioning groove 3143, and the guide groove 3142 and the positioning groove 3143 are arranged at intervals and are uniformly distributed on the inner wall of the gear sleeve 314 along the circumference. A guide slope 3144 is formed at the outer side of the lower end of the adjacent guide groove 3142 and positioning groove 3143. A positioning block 3111 is fixed to the lower end of the outer side surface of the pressing lever 311, and the positioning block 3111 can be inserted into the guide groove 3142 and the positioning groove 3143 and slide axially along the guide groove 3142 and the positioning groove 3143. The lower end of the pressing rod 311 is provided with inclined driving inclined planes 3112, and the driving inclined planes 3112 are uniformly distributed along the circumference of the pressing rod 311. The latch 3121 is evenly distributed on the circumference of the rotating shaft 312, the top surface of the latch 3121 is a sliding slope, and the outer end of the latch 3121 can be snapped into the guide groove 3142 but cannot be snapped into the positioning groove 3143. The bottom of the rotating shaft 312 is provided with a kidney-shaped jack, the upper end of the drive plate 37 is provided with an insert rod 371, and the insert rod 371 is inserted into the jack. The section of the inserted bar 371 and the section of the insertion hole are both in a runway shape, the two ends of the section of the inserted bar 371 are circular arcs, and a straight line is arranged between the two circular arcs. The pressing rod 311, the rotating shaft 312 and the gear sleeve 314 adopt an automatic pen pressing structure, in the application, the pressing rod 311 is connected with an external driving mechanism, when the external driving mechanism presses down the pressing rod 311, the rotating shaft 312 slides downwards along the guide groove 3142 under the action of the driving inclined surface 3112 at the lower end of the pressing rod 311, and when the driving inclined surface 3112 and the guide inclined surface 3144 are in the same plane, the rotating shaft 312 rotates and slides upwards along the driving inclined surface 3112 and the guide inclined surface 3144 under the driving of the spring 313, so as to slide into the bottom of the guide inclined surface 3144. When the pressing lever 311 is pressed again, the latch 3121 is escaped from the bottom of the guide groove 3142 and then slides into the next guide groove 3142 along the next guide slope 3144.

A dial 37, a movable valve plate 38 and a fixed valve plate 39 are mounted in the lower housing 32. An insertion rod 371 is integrally arranged at the upper end of the dial 37, and the insertion rod 371 penetrates out of the top of the lower shell 32 and extends into an insertion hole at the bottom of the rotating shaft 312. The insertion rod 371 is inserted into the insertion hole and rotates together with the rotation shaft 312. The rotary shaft 312 is capable of sliding up and down in the axial direction outside the plunger 371 while driving the plunger 371 to rotate together. The depth of the insertion hole is controlled to control the pressing stroke of the pressing lever 311, thereby preventing the positioning block 3111 at the lower end of the pressing lever 311 from coming out of the guide groove 3142 or the positioning groove 3143. Two claws 372 are arranged at the lower end of the drive plate 37, two grooves 381 are arranged on the side edge of the upper end of the movable valve plate 38, and the claws 372 are clamped into the grooves 381. When the dial 37 rotates, the pawl 372 drives the movable valve plate 38 to rotate together. The fixed valve plate 39 is provided with a protrusion 391 on the side surface, and the fixed valve plate 39 is circumferentially fixed with the lower housing 32 through the protrusion 391. The fixed valve plate 39 is provided with a water inlet through hole, the movable valve plate 38 is provided with an overflowing through hole, the side surface of the lower shell 32 is provided with a water outlet 11, and the bottom of the lower shell 32 is provided with a water inlet 13. When the overflowing through hole on the movable valve plate 38 is overlapped with the water inlet through hole on the fixed valve plate 39, water enters the lower casing 32 from the inlet 322 on the side surface of the lower casing 32, then passes through the movable valve plate 38 and the fixed valve plate 39, finally flows out from the outlet 321 at the lower end of the lower casing 32, and then flows out through the water outlet 11 and the water outlet channel 211. When the overflow through hole of the movable valve plate 38 and the water inlet through hole of the fixed valve plate 39 are completely staggered, the water inlet through hole is closed, so that water is blocked.

Preferably, the water pump of the tooth flushing device in the application comprises a water inlet connecting piece 41 and a water inlet valve piece 42, the pump body 1 comprises a water inlet 13 and a water inlet mounting counter bore 14, the water inlet connecting piece 41 is fixedly mounted in the water inlet mounting counter bore 14, the water inlet connecting piece 41 is provided with a water inlet channel 411, the water inlet channel 411 is communicated with an inner cavity of the pump body 1 through the water inlet 13, a second arc-shaped slot is formed in the water inlet valve piece 42, the water inlet valve piece 42 is divided into a movable part of the water inlet valve piece 42 and a fixed part of the water inlet valve piece 42 by the second arc-shaped slot, the middle part of the bottom end of the water inlet mounting counter bore 14 is provided with a water inlet avoiding pit 141, the fixed part of the water inlet valve piece 42 is clamped by the bottom wall of the water inlet connecting piece 41 and the edge of the bottom end of the water inlet mounting counter bore 14 together, the movable part of the water inlet valve piece 42 covers a water outlet of the water inlet channel 411, and the water inlet avoiding pit 141 is used for avoiding the movable part of the water inlet valve piece 42.

A piston 5 is arranged in the pump body 1, a metal sheath 15 is fixedly arranged on the inner wall of a cavity of the pump body 1, and the piston 5 is slidably matched with the metal sheath 15.

This application still includes core support 6, motor 61, eccentric wheel 7 and connecting rod 8, and the top of connecting rod 8 is articulated with piston 5, and 1 rigid coupling of the pump body is in core support 6, and in eccentric wheel 7 rotationally located core support 6, the top of connecting rod 8 is articulated with piston 5, and the bottom of connecting rod 8 is equipped with adapter sleeve 81, and on eccentric wheel 7 was located to adapter sleeve 81 rotationally the cover, motor 61 was used for driving eccentric wheel 7 and rotates. For components and their functional principles not mentioned in the present application, reference may be made to chinese patent CN (208823022) U.

In the process that the piston 5 moves to reduce the volume of the inner cavity of the pump body 1, at this time, the water outlet control member 3 is in an initial state, the positioning block 3111 of the pressing rod 311 and the latch 3121 of the rotating shaft 312 are both located in the guide groove 3142, and the sliding inclined surface on the latch 3121 is abutted against the driving inclined surface 3112 at the lower end of the pressing rod 311. At this time, the water inlet through hole on the fixed valve plate 39 coincides with the water outlet through hole on the movable valve plate 38, and at this time, the water outlet control member 3 is in an open state, and water can flow out from the outlet 321. Then the piston 5 continues to move and contacts with the pressing rod 311 to press the pressing rod 311 downwards, the driving inclined surface 3112 at the lower end of the pressing rod 311 drives the rotating shaft 312 to slide downwards together, when the driving inclined surface 3112 at the lower end of the pressing rod 311 and the guiding inclined surface 3144 at the lower end of the gear sleeve 314 are in the same plane, the latch 3121 on the rotating shaft 312 is no longer limited by the guiding groove 3142, the sliding inclined surface on the latch 3121 slides along the driving inclined surface 3112 and the guiding inclined surface 3144 under the elastic force of the spring 313, so that the rotating shaft 312 moves upwards while rotating and is clipped into the bottom of the guiding inclined surface 3144. At this time, the driving plate 37 rotates along with the rotating shaft, so as to drive the movable valve plate 38 to rotate, so that the overflowing through hole on the movable valve plate 38 and the water inlet through hole on the fixed valve plate 39 are completely staggered, the water outlet control element 3 is in a closed state, water cannot flow out from the outlet 321, then the piston 5 is reset to increase the volume of the inner cavity of the pump body 1, in the process, liquid of the water inlet channel 411 impacts the movable part of the water inlet valve plate 42, the movable part of the water inlet valve plate 42 swings towards the inner cavity of the pump body 1, the water inlet valve plate 42 is opened, so that the water inlet 13 is communicated with the water inlet channel 411, and water inlet is realized.

Then the piston 5 moves to reduce the volume of the inner cavity of the pump body 1, at this time, because the overflowing through hole on the movable valve plate 38 and the water inlet through hole on the fixed valve plate 39 are completely staggered, and the water outlet control member 3 is in a closed state, water flow cannot be discharged out of the pump body 1 until the piston 5 abuts against the pressing rod 311, and the pressing rod 311 is pushed to slide downwards and drive the rotating shaft 312 to slide downwards. Since the latch 3121 is located at the bottom of the guide slope 3144 and is not completely reset, when the pressing lever 311 is pressed next time, the driving slope 3112 of the pressing lever 311 and the guide slope 3144 can be in a coplanar state only by pressing down a small distance. When the driving inclined surface 3112 at the lower end of the pressing lever 311 is coplanar with the guide inclined surface 3144, the rotation shaft 312 slides along the next guide inclined surface 3144 by the spring 313, so that the rotation shaft 312 slides upward while rotating. The rotating shaft 312 rotates again, and the movable valve plate 38 is driven to rotate correspondingly, so that the water inlet through hole in the fixed valve plate 39 and the water outlet through hole in the movable valve plate 38 coincide, the water outlet control member 3 is restored to an open state, and water flow can be discharged through the outlet 321.

An installation ring groove 51 is formed in the side wall of the piston 5, a Y-shaped sealing ring 52 is arranged in the installation ring groove 51, the piston 5 is in clearance fit with the metal sheath 15, and the Y-shaped sealing ring 52 is in interference fit with the metal sheath 15. Preferably, at least two of the mounting ring grooves 51 are provided, and the mounting ring grooves 51 are arranged in the axial direction of the piston 5. Through the airtight fit of the Y-shaped sealing ring 52 and the inner wall of the pump body 1, the Y-shaped sealing ring 52 is more utilized to be in airtight fit with the inner wall of the pump body 1 in the movement process of the piston 5, the direct abrasion between the piston 5 and the inner wall of the pump body 1 is reduced, and the performance of the tooth flushing device is ensured to a certain extent

The water pump of the tooth flushing device comprises a flexible sealing sleeve 9, the top edge of the flexible sealing sleeve 9 is in sealing connection with the bottom of the pump body 1, and the bottom edge of the flexible sealing sleeve 9 is in sealing connection with a connecting rod 8, so that a water drainage cavity is formed in the lower portion of the pump body 1. The flexible sealing sleeve 9 is provided with a water outlet which is connected with a drainage pipeline 16, and the drainage pipeline 16 is communicated with the drainage cavity through the water outlet.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The utility model provides a water pump for tooth flushing device which characterized in that: including the pump body (1), go out water connecting piece (21) and play water control piece (3), the pump body (1) is equipped with delivery port (11) and goes out water installation counter bore (12), go out water connecting piece (21) fixed mounting in go out in water installation counter bore (12), go out water passageway (211) has been seted up to water connecting piece (21), go out water passageway (211) with the inner chamber of the pump body (1) passes through delivery port (11) intercommunication, go out water control piece (3) install in the pump body (1), go out water control piece (3) and include casing (31) and lower casing (32), casing (32) install down in delivery port (11), just casing (32) upper end stretches out down delivery port (11) and seted up entry (322), casing (32) lower extreme down seted up with export (321) of delivery port (11) intercommunication, install in last casing (31) press lever (311), rotation axis (312), spring (313), install driver plate (37), movable valve piece (38), fixed valve piece (39) in casing (32) down, driver plate (37) and rotation axis (312) circumference block, be equipped with latch (3121) on rotation axis (312), press lever (311) bottom is provided with drive inclined plane (3112), still include gear sleeve (314) with last casing (31) components of a whole that can function independently setting, gear sleeve (314) are installed in last casing (31), gear sleeve (314) and last casing (31) circumference block, press lever (311) and rotation axis (312) are inserted and are established in gear sleeve (314), gear sleeve (314) inner wall is provided with guide way (3142), latch (3121) sliding fit is in guide way (3142), guide inclined plane (3144) have been seted up to gear sleeve (314) lower extreme.

2. The water pump of claim 1, wherein: the water pump of the water flushing device comprises a water inlet connecting piece (41) and a water inlet valve piece (42), the pump body (1) comprises a water inlet (13) and a water inlet installation counter bore (14), the water inlet connecting piece (41) is fixedly installed in the water inlet installation counter bore (14), a water inlet channel (411) is formed in the water inlet connecting piece (41), the water inlet channel (411) is communicated with an inner cavity of the pump body (1) through the water inlet (13), a second arc-shaped groove is formed in the water inlet valve piece (42), the water inlet valve piece (42) is divided into a water inlet valve piece moving portion (421) and a water inlet valve piece (42) fixing portion through the second arc-shaped groove, a water inlet avoiding pit (141) is formed in the middle of the bottom end of the water inlet installation counter bore (14), the water inlet valve piece (42) fixing portion is clamped by the bottom wall of the water inlet connecting piece (41) and the bottom end edge of the water inlet installation counter bore (14) together, the water inlet valve plate movable part (421) covers the water outlet of the water inlet channel (411), and the water inlet avoiding pit (141) is used for avoiding the water inlet valve plate movable part (421).

3. The water pump of claim 1, wherein: the pump is characterized in that a piston (5) is arranged in the pump body (1), a metal sheath (15) is fixedly arranged on the inner wall of a cavity of the pump body (1), and the piston (5) is slidably matched with the metal sheath (15).

4. The water pump of claim 3, wherein: installation annular groove (51) have been seted up to the lateral wall of piston (5), be equipped with Y type sealing washer (52) in installation annular groove (51), piston (5) with metal sheath (15) clearance fit, Y type sealing washer (52) with metal sheath (15) interference fit.

5. The water pump of claim 3, wherein: including core support (6), motor (61), eccentric wheel (7) and connecting rod (8), the top of connecting rod (8) with piston (5) are articulated, the pump body (1) rigid coupling in core support (6), eccentric wheel (7) are rotationally located in core support (6), the bottom of connecting rod (8) is equipped with connecting sleeve (81), connecting sleeve (81) are rotationally located the cover is on eccentric wheel (7), motor (61) are used for the drive eccentric wheel (7) rotate.

6. The water pump of claim 5, wherein: including flexible sealing cover (9), the top edge of flexible sealing cover (9) with pump body (1) bottom sealing connection, the bottom edge of flexible sealing cover (9) with connecting rod (8) sealing connection, thereby the lower part of the pump body (1) forms a drainage chamber, flexible sealing cover (9) are equipped with the outlet, the outlet connection has drainage pipe (16), drainage pipe (16) pass through the outlet with the drainage chamber intercommunication.

7. The water pump of claim 1, wherein: the lower end of the rotating shaft (312) is provided with a jack, the upper end of the drive plate (37) is provided with an inserted bar (371), and the inserted bar (371) is circumferentially clamped in the jack.

8. The water pump of claim 1, wherein: the inner wall of the upper shell (31) is provided with a limiting clamping block, the outer wall of the gear sleeve (314) is provided with a limiting groove hole, and the limiting clamping block is inserted into or clamped into the limiting groove hole.

9. The water pump for a dental irrigator according to claim 1, wherein: a positioning groove (3143) is further formed in the inner wall of the gear sleeve (314), a positioning block (3111) is arranged on the outer side of the pressing rod (311), and the positioning block (3111) is arranged in the positioning groove (3143) in a sliding mode.

10. The utility model provides a tooth flushing device which characterized in that: comprising the water pump according to any one of claims 1 to 9.

Images