CN213372659U - Tooth washing device - Google Patents

Abstract

The utility model discloses a tooth washing device, include: the water delivery device comprises a shell, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the spray pipe is arranged on the shell, an accommodating cavity is formed in the shell, the lower end of the accommodating cavity is opened, a water delivery device is arranged in the accommodating cavity, and the water outlet end of the water delivery device is communicated with the spray pipe; the upper portion and the holding chamber of storage water tank are connected, and the play water end of storage water tank communicates in water delivery device's the end of intaking, and the junction in storage water tank and holding chamber is provided with seal structure, and seal structure acts on the inner wall in holding chamber, and seal structure can be sealed the space at water delivery device place, has avoided water or filth to pass through inside corroding water delivery device of clearance infiltration casing. In the technical scheme, the sealing structure is arranged at the joint of the upper part of the water storage tank and the containing cavity, a thread hole position for sealing is not required to be processed on the shell, so that the water storage tank can be designed according to the structure for increasing the water storage capacity, the processing of the shell is further simplified, the manufacturing is convenient, the sealing performance is good, and the service life of the tooth washing device is prolonged.

Description

Tooth washing device

Technical Field

The utility model relates to the technical field of tooth washing devices, in particular to a tooth washing device.

Background

In the prior art, the tooth washing device mainly comprises a shell, a spray pipe, a water delivery device and a water storage tank, wherein the spray pipe is arranged at the upper part of the shell, the water storage tank is arranged at the lower part of the shell, and the water delivery device is arranged in the shell and is respectively communicated with the spray pipe and the water storage tank. In the prior art, in order to improve the sealing performance inside the shell and prevent water or dirt from entering the shell, a threaded hole is processed at the lower end of the shell, a seal plate is arranged in a penetrating mode through screws and is in threaded connection with the threaded hole, and the water storage tank is located on one side of the seal plate to improve the sealing performance.

However, the shell of the tooth washing device is generally formed by a mold forming process, and in order to facilitate the shell to be demolded, the thickness of the product along the demolding direction is gradually reduced in the mold design stage in advance to form the demolding inclination. However, because the length and the size of the shell of the tooth washing device are large, the die drawing of the shell is too long, the wall thickness of the lower end part of the shell is thin, the thread hole position is large in processing difficulty and poor in stability, the thread hole position is influenced by the structural strength and the attractiveness of the shell, the processing quantity of the thread hole position is limited, the water delivery device inside the shell cannot be sealed in all directions, partial gaps still exist at the lower end part of the shell, water or dirt easily permeate into the shell through the gaps, the water delivery device inside the shell is corroded, and the service life of the tooth washing device is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a tooth washing device, tooth washing device makes conveniently, and the leakproofness is better, and life is longer.

According to the utility model discloses water toothpick, include: the water delivery device comprises a shell, a water inlet pipe, a water outlet pipe and a water outlet pipe, wherein the spray pipe is arranged on the shell, an accommodating cavity is arranged in the shell, the lower end of the accommodating cavity is opened, a water delivery device is arranged in the accommodating cavity, and the water outlet end of the water delivery device is communicated with the spray pipe; the upper portion of storage water tank with the holding chamber is connected, the play water end of storage water tank communicate in water delivery device's the end of intaking, the storage water tank with the junction in holding chamber is provided with seal structure, seal structure acts on the inner wall in holding chamber, seal structure can be to the space seal at water delivery device place.

According to the utility model discloses water toothpick has following beneficial effect at least: the sealing structure acts on the inner wall of the accommodating cavity, and the space where the water delivery device is located is sealed through the sealing structure, so that water or dirt is prevented from permeating into the shell through gaps to corrode the water delivery device. Compared with the prior art, in the technical scheme, the sealing structure is arranged at the joint of the upper part of the water storage tank and the containing cavity, a thread hole position for sealing is not required to be processed on the shell, so that the water storage tank can be designed according to the structure for increasing the water storage capacity, the processing of the shell is further simplified, the manufacturing is convenient, the sealing structure can be closely matched with the containing cavity, the sealing performance is good, and the service life of the tooth washing device is prolonged.

According to the utility model discloses a some embodiments, the opening in holding chamber is the annular setting, it is protruding that the upper portion of storage water tank is along its vertical annular that is provided with, the annular is protruding can stretch into to the holding intracavity, seal structure includes annular boss and ring type seal, annular boss transversely set up in orientation on the annular is protruding one side of holding intracavity wall, the side of annular boss hug closely in the inner wall in holding chamber, just be provided with the annular groove on the annular boss, be provided with in the annular groove ring type seal, ring type seal acts on holding intracavity wall, simple structure has improved the stability and the leakproofness of connecting.

According to the utility model discloses a some embodiments, the casing includes barrel and vertical setting and is in go up the lower baffle of barrel lower part, the holding chamber set up in go up the barrel, the storage water tank hug closely in baffle down, down the lateral wall of baffle with it is protruding along the vertical first location that is provided with on both of them of storage water tank, down the lateral wall of baffle with on both of them of storage water tank along vertical be provided with the first locating groove of the protruding joint complex of first location, the relative position of the installation of casing and storage water tank can be fixed, avoids the storage water tank drunkenness, improves the stability of connecting.

According to some embodiments of the utility model, water delivery device includes water delivery mechanism, circuit board and battery, water delivery mechanism has the water delivery chamber, the end of intaking in the water delivery chamber communicate in the storage water tank, the play water end in water delivery chamber communicate in the spray tube, water delivery mechanism the battery respectively with circuit board electricity is connected, just the circuit board water delivery mechanism with the battery set up side by side in proper order in the holding intracavity, the space of the holding intracavity portion of rational utilization casing reduces the unnecessary volume, and is rational in infrastructure compact, has reduced the vertical size of tooth washing ware, reduce cost.

According to some embodiments of the utility model, water delivery mechanism includes water delivery spare and toothed disc, driving motor, connecting rod and piston, the water delivery chamber set up in the water delivery spare, the toothed disc rotates the setting along vertical direction, driving motor is located the below of toothed disc and with the toothed disc transmission is connected, be provided with the eccentric wheel on the toothed disc, the connecting rod cover is located on the eccentric wheel, the piston set up in the upper end of connecting rod is located in the water delivery subassembly, be convenient for to the storage water tank pumping transport, the spray tube goes out water pressure big, can effectively clear up the tooth dirt, and clean effect is better, and the transmission is reliable.

According to the utility model discloses a some embodiments, spray tube detachably set up in the casing, be provided with on the casing and be used for the locking device of spray tube can realize the quick replacement and the washing of spray tube, and the locking is reliable.

According to some embodiments of the utility model, locking device includes locking piece, driving piece and is used for the drive the elastic construction that the locking piece resets, the locking piece slidable set up in the casing, the driving piece with the locking piece transmission is connected, the elastic construction is located the locking piece with between the casing, the elastic construction with form between the locking piece and be used for the locking the lockhole of spray tube, the driving piece can drive the locking piece removes to removing the locking to the spray tube. The spray pipe can be replaced and cleaned quickly, and the locking is reliable.

According to the utility model discloses a some embodiments, be provided with on the locking piece and be located second location arch in the keyhole, be provided with on the spray tube with the protruding joint complex second constant head tank in second location, the second location arch can be followed the locking piece removes to breaking away from the second constant head tank. The elastic structure is arranged to limit the second positioning bulge to be separated from the second positioning groove, so that the spray pipe is fixed on the tooth washing device, and the normal tooth washing function is realized; when the spray pipe needs to be cleaned, the driving piece drives the locking piece to move, the elastic structure generates elastic deformation, the second positioning protrusion can move to be separated from the second positioning groove along with the locking piece, and the spray pipe can be detached from the tooth washing device; after the spray pipe is detached, the locking piece is driven to reset through the elastic structure, and the use is convenient.

According to the utility model discloses a some embodiments, elastic construction with the locking piece configuration is the integral type structure, simple structure, and it is convenient to install, and save time has reduced manufacturing cost.

According to some embodiments of the present invention, the locking piece has an installation opening thereon, the elastic structure includes an abutting portion and an elastic portion, the abutting portion and an interval between one side in the installation opening to form the locking hole, one end of the elastic portion is connected to the abutting portion, and the other end of the elastic portion is connected to the other side of the installation opening. The spray pipe is locked more firmly by the matching of the abutting part and the second positioning bulge. The locking piece is followed to the second location arch and is removed to breaking away from the second constant head tank, and the elasticity portion compression to detach the spray tube and wash the tooth ware, locking piece and second location arch reset under the elastic action of elasticity portion, can take off the spray tube from washing the tooth ware easily or install and go, both made things convenient for the use of washing the tooth ware, can make things convenient for the washing of spray tube again.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a dental scaler according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at B in FIG. 2;

FIG. 5 is an exploded view of FIG. 1;

FIG. 6 is a partially exploded schematic view of FIG. 1;

FIG. 7 is a schematic view of the construction of the spout and the locking device;

fig. 8 is a schematic view of the locking member and the resilient structure.

Reference numerals:

the device comprises a shell 10, an accommodating cavity 11, an upper cylinder 12, a lower baffle 13, a first positioning bulge 14, a concave part 15, a positioning column 151, a sealing cover 16 and a water drainage hole 17;

a spray pipe 20 and a second positioning groove 21;

the water delivery device 30, the water delivery mechanism 31, the water delivery part 311, the gear disc 312, the driving motor 313, the connecting rod 314, the piston 315, the eccentric wheel 316, the circuit board 32 and the battery 33;

a water storage tank 40, an annular bulge 41, an annular boss 42, an annular groove 421, a first positioning groove 43, a water storage shell 44, a top shell 45 and a groove 46;

the locking member 51, the second positioning protrusion 511, the mounting opening 512, the first inclined surface 513, the driving member 52, the second inclined surface 521, the elastic structure 53, the abutting portion 531, the elastic portion 532, and the locking hole 54.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1, 2 and 3, a tooth washing device according to an embodiment of the present invention includes: the water delivery device comprises a shell 10, a spray pipe 20 is arranged on the shell 10, an accommodating cavity 11 is arranged in the shell 10, the lower end of the accommodating cavity 11 is opened, a water delivery device 30 is arranged in the accommodating cavity 11, and the water outlet end of the water delivery device 30 is communicated with the spray pipe 20; the upper portion of storage water tank 40 is connected with holding chamber 11, and the play water end of storage water tank 40 communicates in the end of intaking of water delivery device 30, and the junction of storage water tank 40 and holding chamber 11 is provided with seal structure, and seal structure acts on the inner wall of holding chamber 11, and seal structure can be sealed to the space at water delivery device 30 place.

According to the utility model discloses tooth washing device, seal structure acts on the inner wall in holding chamber 11, and is sealed to the space at water delivery device 30 place through seal structure, has avoided water or filth to pass through the inside corruption to water delivery device 30 of clearance infiltration casing 10. Compared with the prior art, in the technical scheme, the sealing structure is arranged at the joint of the upper part of the water storage tank 40 and the containing cavity 11, a thread hole position for sealing is not required to be processed on the shell 10, so that the water storage tank 40 can be designed according to the structure for increasing the water storage capacity, the processing of the shell 10 is further simplified, the manufacturing is convenient, the sealing structure can be closely matched with the containing cavity 11, the sealing performance is good, and the service life of the tooth washing device is prolonged.

It can be understood, as shown in fig. 1 to 3, in some embodiments of the utility model, the opening of holding chamber 11 is the annular setting, the upper portion of storage water tank 40 is provided with annular protrusion 41 along its vertical, annular protrusion 41 can stretch into to holding chamber 11 in, seal structure includes annular boss 42 and ring type seal (not shown in the figure), annular boss 42 transversely sets up in annular protrusion 41 towards one side of holding chamber 11 inner wall, the side of annular boss 42 is hugged closely in the inner wall of holding chamber 11, and be provided with annular groove 421 on the annular boss 42, be provided with ring type seal in the annular groove 421, ring type seal acts on holding chamber 11 inner wall, moreover, the steam generator is simple in structure, the stability and the leakproofness of connection are improved.

It can be understood that, in some embodiments of the present invention, the annular protrusion 41 and the water storage tank 40 are of an integral structure, which is simple in structure and convenient to install.

Of course, in some embodiments, the sealing structure may be other structures, and is not limited herein.

As shown in fig. 1 to 3, 5 and 6, in some embodiments of the present invention, the housing 10 includes an upper cylinder 12 and a lower baffle 13 vertically disposed at a lower portion of the upper cylinder 12, the accommodating chamber 11 is disposed in the upper cylinder 12, the water storage tank 40 is closely attached to the lower baffle 13, a first positioning protrusion 14 is vertically disposed on a sidewall of the lower baffle 13, and the water storage tank 40 is vertically disposed with a first positioning groove 43 engaged with the first positioning protrusion 14. The relative positions of the installation of the shell 10 and the water storage tank 40 can be fixed, the water storage tank 40 is prevented from moving, and the connection stability is improved.

Of course, in some embodiments, the water storage tank 40 is vertically provided with the first positioning protrusion 14, and the sidewall of the lower baffle 13 is vertically provided with the first positioning groove 43 that is in snap fit with the first positioning protrusion 14, which still has the above-mentioned effects, and is not limited herein.

It should be noted that in some embodiments of the present invention, the water storage tank 40 includes a water storage shell 44 and a top shell 45, the top shell 45 is installed on the top of the water storage shell 44, the top shell 45 is provided with a water outlet channel communicated with the water storage shell 44, the sealing structure is disposed on the upper end of the top shell 45, the top shell 45 and the water storage shell 44 can be disassembled for connection, the mold opening is convenient, and the processing is convenient. Of course, in some embodiments, the top shell 45 and the water storage shell 44 are non-removably connected and may be integrally formed.

It can be understood that, as shown in fig. 1, fig. 2, fig. 5 and fig. 6, in some embodiments of the present invention, the water delivery device 30 includes a water delivery mechanism 31, a circuit board 32 and a battery 33, the water delivery mechanism 31 has a water delivery cavity, the water inlet end of the water delivery cavity communicates with the water storage tank 40, the water outlet end of the water delivery cavity communicates with the spray pipe 20, the water delivery mechanism 31 and the battery 33 are respectively electrically connected with the circuit board 32, and the circuit board 32, the water delivery mechanism 31 and the battery 33 are sequentially arranged in the accommodating cavity 11 side by side, the space inside the accommodating cavity 11 of the housing 10 is reasonably utilized, unnecessary volume is reduced, the structure is reasonably compact, the longitudinal size of the tooth washing device is reduced, and the cost is reduced.

As shown in fig. 2 and 5, in some embodiments of the present invention, the water delivery mechanism 31 includes a water delivery member 311, a gear plate 312, a driving motor 313, a connecting rod 314, and a piston 315, the water delivery cavity is disposed in the water delivery member 311, the gear plate 312 is disposed along a vertical direction, the driving motor 313 is disposed below the gear plate 312 and is in transmission connection with the gear plate 312, an eccentric 316 is disposed on the gear plate 312, the connecting rod 314 is sleeved on the eccentric 316, and the piston 315 is disposed at an upper end of the connecting rod 314 and is disposed in the water delivery assembly 311. The water storage tank 40 is convenient to pump and convey, the water outlet pressure of the spray pipe 20 is high, tooth dirt can be effectively cleaned, the cleaning effect is good, and the transmission is reliable.

It should be noted that, in some embodiments of the present invention, the upper end surface of the water storage tank 40 is recessed downward to form a groove 46 for accommodating the lower portion of the driving motor 313, so as to make full use of the space and make the assembly of the dental scaler more reasonable.

As shown in fig. 1, 2, 4, 5, 7 and 8, in some embodiments of the present invention, the nozzle 20 is detachably disposed in the housing 10, and a locking device for locking the nozzle 20 is disposed in the housing 10, so that the nozzle 20 can be quickly replaced and cleaned, and the locking is reliable.

In some embodiments of the present invention, the locking device includes a locking member 51, a driving member 52 and an elastic structure 53 for driving the locking member 51 to reset, the locking member 51 is slidably disposed in the housing 10, the driving member 52 is in transmission connection with the locking member 51, the elastic structure 53 is located between the locking member 51 and the housing 10, a locking hole 54 for locking the nozzle tube 20 is formed between the elastic structure 53 and the locking member 51, the driving member 52 can drive the locking member 51 to move to release the locking of the nozzle tube 20, the quick replacement and cleaning of the nozzle tube 20 can be realized, and the locking is reliable.

In some embodiments of the present invention, the locking member 51 is provided with a second positioning protrusion 511 located in the locking hole 54, the nozzle 20 is provided with a second positioning groove 21 engaged with the second positioning protrusion 511, and the second positioning protrusion 511 can follow the locking member 51 to move to separate from the second positioning groove 21. When the nozzle 20 is installed on the tooth washing device, the second positioning protrusion 511 can be clamped into the second positioning groove 21 of the nozzle 20, and the elastic structure 53 is arranged to limit the second positioning protrusion 511 to be separated from the second positioning groove 21, so that the nozzle 20 is fixed on the tooth washing device, and the normal tooth washing function is realized; when the nozzle 20 needs to be cleaned, the driving member 52 drives the locking member 51 to move, the elastic structure 53 is elastically deformed, the second positioning protrusion 511 can move to disengage from the second positioning groove 21 along with the locking member 51, and the nozzle 20 can be detached from the dental scaler; after the nozzle 20 is detached, the locking piece 51 is driven to reset through the elastic structure 53, and the use is convenient.

The utility model discloses a some embodiments, elastic structure 53 and locking piece 51 configuration are the integral type structure, simple structure, and it is convenient to install, and save time has reduced manufacturing cost.

It is understood that, as shown in fig. 1, 2, 4, 5, 7 and 8, in some embodiments of the present invention, the locking member 51 has an installation through opening 512 thereon, the elastic structure 53 includes an abutting portion 531 and an elastic portion 532, a space is formed between the abutting portion 531 and one side inside the installation through opening 512 to form a locking hole 54, one end of the elastic portion 532 is connected to the abutting portion 531, and the other end of the elastic portion 532 is connected to the other side of the installation through opening 512. The spout 20 is locked more securely by the abutment 531 cooperating with the second positioning projection 511. The second positioning protrusion 511 moves to be separated from the second positioning groove 21 following the locking member 51, the elastic part 532 is compressed, so that the nozzle 20 is detached from the tooth washing device, the locking member 51 and the second positioning protrusion 511 are reset under the elastic action of the elastic part 532, the nozzle 20 can be easily taken down from or installed on the tooth washing device, the use of the tooth washing device is facilitated, and the cleaning of the nozzle 20 is facilitated.

It can be understood that, as shown in fig. 1, fig. 2 and fig. 5, the upper portion of the housing 10 has a concave portion 15, the top of the housing 10 is provided with a sealing cover 16 covering the concave portion 15, the concave portion 15 is provided with a jack corresponding to the locking hole 54, the jack is aligned with the water outlet end of the water delivery member 311, the aperture of the jack is adapted to the pipe diameter of the nozzle 20, the sealing cover 16 is provided with an avoiding hole avoiding the nozzle 20, the concave portion 15 is provided with a positioning post 151 extending into the locking hole 54, the abutting portion 531 abuts against the positioning post 151, the nozzle 20 sequentially passes through the avoiding hole, the locking hole 54 and the jack, and is clamped to the second positioning groove 21 of the nozzle 20 through the second positioning protrusion 511 of the locking member 51, so as to lock the position of the nozzle 20; and at least one drain hole 17 for draining water to the outside is formed in the concave position 15 of the shell 10, so that the accumulation and the detention of the liquid are avoided.

Of course, in some embodiments, the elastic structure 53 is connected to the locking member 51 and located at one side of the locking member 51, the elastic structure 53 includes an abutting portion 531 and an elastic portion 532, a clamping block and a positioning pillar 151 are disposed in the housing 10, the nozzle 20 is inserted into the housing 10, the positioning protrusion is clamped in the second positioning groove 21 of the nozzle 20, one side of the nozzle 20 abuts against the clamping block, the abutting portion 531 abuts against the positioning pillar 151, and when the locking member 51 moves, the elastic portion 532 can be compressed, so that the second positioning protrusion 511 is disengaged from the second positioning groove 21, which still has the above-mentioned effects.

In some embodiments of the present invention, the elastic portion 532 is a sawtooth wave shape, and has a simple structure and is easy to process. Of course, in some embodiments, the elastic portion 532 may also be z-shaped or an elastic block, and the like, which is not limited herein.

In some embodiments of the present invention, the locking member 51 is configured as a plastic member, which is not only light in overall weight, but also easy to process and low in cost. Of course, in some embodiments, the locking element 51 may be made of other materials, such as: metal, etc., without limitation.

The utility model discloses a some embodiments, but driving piece 52 locking piece 51 goes up and down relatively, is provided with transmission portion on the locking piece 51, and driving piece 52 is provided with the drive division of being connected with the transmission of transmission portion, and structural design is novel reasonable, simple structure is compact, and the transmission is reliable.

In some embodiments of the present invention, the transmission portion is a first inclined surface 513 disposed on the locking member 51, and the driving portion is a second inclined surface 521 disposed on the driving member 52 and engaged with the first inclined surface 513. Through the cooperation of first inclined plane 513 and second inclined plane 521 to driving piece 52 can promote locking piece 51 and remove, and structural design is novel reasonable, and simple structure is compact, and the transmission is reliable.

Of course, in some embodiments, the driving portion may also be an elastic pressing block, and the transmission portion is an end surface of the locking member 51 facing the driving portion, and the driving portion radially presses the transmission portion, so as to drive the locking member 51 to move, and further the positioning protrusion is disengaged from the positioning groove.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. A dental prophylaxis device, comprising:

the water-saving device comprises a shell (10), wherein a spray pipe (20) is arranged on the shell (10), an accommodating cavity (11) is arranged in the shell (10), the lower end of the accommodating cavity (11) is opened, a water delivery device (30) is arranged in the accommodating cavity (11), and the water outlet end of the water delivery device (30) is communicated with the spray pipe (20);

the water storage tank (40), the upper portion of water storage tank (40) with holding chamber (11) are connected, the play water end of water storage tank (40) communicate in the end of intaking of water delivery device (30), water storage tank (40) with the junction of holding chamber (11) is provided with seal structure, seal structure acts on the inner wall of holding chamber (11), seal structure can be right the space at water delivery device (30) place is sealed.

2. The tooth washing device as claimed in claim 1, characterized in that the opening of the accommodating chamber (11) is annularly arranged, an annular protrusion (41) is vertically arranged on the upper portion of the water storage tank (40), the annular protrusion (41) can extend into the accommodating chamber (11), the sealing structure comprises an annular boss (42) and an annular sealing ring, the annular boss (42) is transversely arranged on one side of the annular protrusion (41) facing the inner wall of the accommodating chamber (11), the side surface of the annular boss (42) is tightly attached to the inner wall of the accommodating chamber (11), an annular groove (421) is arranged on the annular boss (42), the annular sealing ring is arranged in the annular groove (421), and the annular sealing ring acts on the inner wall of the accommodating chamber (11).

3. The tooth washing device according to claim 1 or 2, characterized in that the shell (10) comprises an upper barrel (12) and a lower baffle (13) vertically arranged at the lower part of the upper barrel (12), the accommodating cavity (11) is arranged on the upper barrel (12), the water storage tank (40) is tightly attached to the lower baffle (13), a first positioning protrusion (14) is vertically arranged on one of the side wall of the lower baffle (13) and the water storage tank (40), and a first positioning groove (43) which is in clamping fit with the first positioning protrusion (14) is vertically arranged on one of the side wall of the lower baffle (13) and the water storage tank (40).

4. The dental rinser of claim 1, characterized in that the water delivery device (30) comprises a water delivery mechanism (31), a circuit board (32) and a battery (33), the water delivery mechanism (31) has a water delivery cavity, the water inlet end of the water delivery cavity is communicated with the water storage tank (40), the water outlet end of the water delivery cavity is communicated with the spray pipe (20), the water delivery mechanism (31) and the battery (33) are electrically connected with the circuit board (32), and the circuit board (32), the water delivery mechanism (31) and the battery (33) are sequentially arranged in the accommodating cavity (11) side by side.

5. The water toothpick according to claim 4, wherein the water delivery mechanism (31) comprises a water delivery member (311) and a gear disc (312), a driving motor (313), a connecting rod (314) and a piston (315), the water delivery cavity is arranged in the water delivery member (311), the gear disc (312) is rotatably arranged in the vertical direction, the driving motor (313) is positioned below the gear disc (312) and is in transmission connection with the gear disc (312), an eccentric wheel (316) is arranged on the gear disc (312), the connecting rod (314) is sleeved on the eccentric wheel (316), and the piston (315) is arranged at the upper end of the connecting rod (314) and is positioned in the water delivery member (311).

6. The dental prophylaxis according to claim 1, wherein the spout (20) is detachably arranged to the housing (10), the housing (10) being provided with locking means for locking the spout (20).

7. The dental articulator as claimed in claim 6, characterized in that said locking means comprise a locking element (51), a driving element (52) and a resilient structure (53) for restoring said locking element (51), said locking element (51) being slidably arranged in said housing (10), said driving element (52) being in driving connection with said locking element (51), said resilient structure (53) being located between said locking element (51) and said housing (10), said resilient structure (53) and said locking element (51) forming between them a locking aperture (54) for locking said nozzle tube (20), said driving element (52) being capable of driving said locking element (51) to move out of locking said nozzle tube (20).

8. The dental articulator as claimed in claim 7, characterized in that said locking element (51) is provided with a second positioning protrusion (511) located inside said locking hole (54), said nozzle tube (20) being provided with a second positioning slot (21) snap-fitted with said second positioning protrusion (511), said second positioning protrusion (511) being movable to disengage from said second positioning slot (21) following said locking element (51).

9. The dental articulator according to claim 7 or 8, characterized in that said resilient structure (53) and said locking element (51) are configured as a one-piece structure.

10. The dental articulator as claimed in claim 9, characterized in that said locking element (51) has a mounting opening (512) formed thereon, said elastic structure (53) comprising an abutment portion (531) and an elastic portion (532), said abutment portion (531) being spaced apart from one side of said mounting opening (512) to form said locking hole (54), one end of said elastic portion (532) being connected to said abutment portion (531), the other end of said elastic portion (532) being connected to the other side of said mounting opening (512).

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