CN217186535U - Shell and tooth flushing device - Google Patents

Abstract

The application discloses casing and towards tooth ware. The casing includes handheld piece and nozzle installed part, the handheld piece includes handheld main part, locate handheld main part wherein the portion of cup jointing of one end, the nozzle installed part is including the cover body, locate the internal first water injection pipe of cover, contact and mutually support through the first spigot surface that sets up the portion's of cup jointing surface and the second spigot surface of first water injection pipe surface, the moving direction of guide nozzle installation department, so that water injection channel docks with the water inlet, and be convenient for other structures butt joints of nozzle installation department and handheld piece. Before the butt joint, first spigot surface and second spigot surface all are in open environment, are convenient for observe the shape of first spigot surface and second spigot surface, adjust the angle of nozzle installed part, make first spigot surface and second spigot surface counterpoint fast. In addition, the outer surface of the first water injection pipe is directly utilized, other structural parts do not need to be arranged to guide the moving direction of the nozzle installation part, and the shell structure is effectively simplified.

Description

Shell and tooth flushing device

Technical Field

The application relates to the technical field of oral care instruments, in particular to a shell and a tooth flushing device.

Background

Along with the improvement of the quality of life of people, the tooth washing device is gradually becoming a common oral cavity nursing tool. The pump body in the tooth flushing device can pump water from the water tank, and sprays comparatively high-speed water flow through the nozzle to the food residue, dental plaque and massage gum etc. in the clearance tooth gap improve the oral cavity environment.

When the structure of the tooth-washing device is assembled, all the structures of the tooth-washing device need to be accurately aligned, so that the water in the water tank of the handheld part can be smoothly transmitted to the nozzle to be sprayed out. The partial structure of the tooth flushing device is arranged in the shell in a hidden way, so that the positioning and the assembly of the tooth flushing device are inconvenient.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a casing and towards tooth ware, can solve towards the inconvenient problem of tooth ware inner structure counterpoint.

In a first aspect, an embodiment of the present application provides a housing for a dental irrigator, including:

the handheld piece comprises a handheld main body and a sleeve joint part connected to the handheld main body, wherein the sleeve joint part extends along a first direction, the handheld main body is provided with a water inlet, the water inlet is opened towards the first direction, and the outer surface of the sleeve joint part towards the water inlet is a first guide surface; and

the nozzle mounting piece comprises a cover body and a first water injection pipe arranged in the cover body, the first water injection pipe is provided with a water injection channel, and the outer surface of the first water injection pipe is provided with a second guide surface; when the nozzle mounting piece is mounted on the handheld piece, the cover body covers the sleeve joint part and the water inlet, the second guide surface is in contact with the first guide surface, and when the nozzle mounting piece is mounted, the second guide surface can slide on the first guide surface to enable the water injection channel to be in butt joint with the water inlet.

In some exemplary embodiments, the first guide surface is adapted to the second guide surface, the first guide surface being a concave surface curved away from the first water filling pipe.

In some exemplary embodiments, the first water injection pipe is a bar pipe; in a plane perpendicular to the length direction of the first water injection pipe, the first guide surface is bent from the central area to the edge area in a way that the curvature is gradually reduced, so that the first guide surface forms a concave curved surface.

In some exemplary embodiments, the second guide surface is a convex surface curved toward the socket part, and a wall surface of the water filling channel adjacent to the second guide surface is a curved surface curved toward the socket part.

In some exemplary embodiments, the handpiece further includes a second water injection tube extending out of the handpiece body, the second water injection tube enclosing the water inlet.

In some exemplary embodiments, the second water injection pipe is connected to a region of the first guide surface adjacent to the hand-held body.

In some exemplary embodiments, the first water injection pipe is at least partially inserted into the water inlet.

In some exemplary embodiments, the first water injection pipe comprises a first section connected to the cover body and a second section connected to the first section, the outer surface of the first section forms a second guide surface, and the second section is inserted into the water inlet.

In some exemplary embodiments, the casing further includes a water injection sealing member, the second section has a sealing groove formed on an outer surface thereof, the water injection sealing member is disposed in the sealing groove, and the water injection sealing member abuts against a wall surface of the water inlet.

In some exemplary embodiments, the nozzle mount further includes a catching flange connected to the cover body, the catching flange being disposed toward the hand-held body, the hand-held body having a catching groove corresponding to the catching flange, the catching groove being defined around the socket part and the water inlet 11a, the catching flange being inserted into the catching groove.

In some exemplary embodiments, the handheld main body is further formed with a drainage groove communicated with the clamping groove, and the drainage groove extends to the periphery of the connection position of the cover body and the handheld main body.

In some exemplary embodiments, the nozzle mounting member further includes a positioning column disposed in the cover body, the handheld main body is provided with a plug-in slot corresponding to the positioning column, the positioning column extends into the plug-in slot, and a wall surface of the positioning column contacts with a wall surface of the plug-in slot.

In some exemplary embodiments, the nozzle mounting member has a plurality of positioning pillars, the plurality of positioning pillars are disposed adjacent to a connection of the nozzle mounting member and the hand-held body, and the plurality of positioning pillars are uniformly distributed.

In some exemplary embodiments, threaded holes are coaxially formed in the positioning column and the bottom wall of the insertion groove, and screws are arranged in the threaded holes to fix the positioning column in the insertion groove.

In a second aspect, embodiments of the present application provide a dental irrigator comprising a housing as described above.

In some exemplary embodiments, the shroud of the housing has a nozzle opening, and the handpiece of the housing has a mounting cavity; the tooth flushing device also comprises:

the nozzle penetrates through the nozzle opening and extends out of the cover body in the direction away from the handheld piece; and

the water tank is located the installation intracavity, and the water tank has the water inlet, water inlet and water inlet intercommunication.

Based on this application embodiment's casing and towards tooth ware, the second spigot surface that sets up the first spigot surface of cup jointing portion surface and first water injection pipe surface contacts and mutually supports, the moving direction of guide nozzle installation department to water injection channel docks with the water inlet, and the other structures docks of being convenient for nozzle installation department and handheld piece, convenient operation. Before the butt joint, first spigot surface and second spigot surface all are in open environment, are convenient for observe the shape of first spigot surface and second spigot surface, adjust the angle of nozzle installed part, make first spigot surface and second spigot surface counterpoint fast. In addition, when the positions of the first guide surface and the second guide surface are designed, the outer surface of the first water injection pipe is directly utilized, other structural parts do not need to be arranged to guide the moving direction of the nozzle installation part, and the shell structure is effectively simplified.

Drawings

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

Fig. 1 is a schematic perspective view of a housing according to an embodiment of the present application;

FIG. 2 is a perspective view of a hand piece corresponding to a nozzle mount according to one embodiment of the present application;

FIG. 3 is a cross-sectional view of a housing according to one embodiment of the present application;

FIG. 4 is a cross-sectional view of a first guide surface in contact with a second guide surface portion of an embodiment of the present application;

FIG. 5 is a schematic perspective view of an embodiment of the present application with a positioning post mounted in a housing;

FIG. 6 is a perspective view of a cap assembly attached to a nozzle mount according to one embodiment of the present application;

FIG. 7 is a perspective view of a dental irrigator according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of a dental irrigator according to an embodiment of the present application.

Reference numerals are as follows:

100. a housing; 101a, a first cavity; 101b, second Cavity

110. A handpiece;

111. a hand-held body; 11a, a water inlet; 11b, a locking groove; 11c, a drainage channel; 11d, inserting grooves;

112. a socket joint part; 112a, a first guide surface; 112c, a second edge; 112b, mounting openings;

113. second water injection pipe

120. A nozzle mount;

121. a cover body; 121a, nozzle opening;

122. a first water injection pipe; 122a, a water injection channel; 122b, a second guide surface; 1221. a first stage; 1222. a second section; 122c, sealing the groove;

123. a positioning column;

130. a water injection sealing element; 140. clamping the flange; 150. a cover body;

A. a first direction; B. a second direction;

200. a tooth flusher; 210. a nozzle; 220. a transfusion drive assembly; 230. a water tank; 231. a water inlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

Referring to fig. 1 and 2, which are schematic structural views of a housing 100 provided in an embodiment of the present application, the housing 100 is used for a dental irrigator 200 and provides shielding for other structures in the dental irrigator 200, the housing 100 includes a hand piece 110 and a nozzle mount 120, and the nozzle mount 120 is mounted at one end of the hand piece 110. The handpiece 110 has a mounting cavity therein into which the water tank 230 of the dental irrigator 200 can be received, the nozzle 210 of the dental irrigator 200 is connected to the nozzle mount 120 and/or the handpiece 110, and the nozzle 210 extends to a side away from the handpiece 110 so that a user can hold the handpiece 110 to extend the nozzle 210 into the oral cavity for oral cavity cleaning.

As shown in fig. 2, the hand piece 110 includes a hand body 111 and a sleeve part 112 connected to the hand body 111, the hand body 111 is a part held by a hand of a user, and the water tank 230 may be installed in the hand body 111. The sleeve portion 112 is disposed at one end of the handheld body 111, and the sleeve portion 112 extends along the first direction a away from the handheld element 110, so that the sleeve portion 112 protrudes out of the handheld body 111. The hand-held body 111 has a water inlet 11a, the water inlet 11a is communicated with the inner space of the water tank 230, the water inlet 11a is provided at the periphery of the socket part 112, and the water inlet 11a is opened toward the first direction a. The outer surface of the sleeve portion 112 facing the water inlet 11a is a first guide surface 112 a.

As shown in fig. 3, the nozzle mount 120 includes a cap body 121, and a first water injection pipe 122 provided in the cap body 121, the first water injection pipe 122 having a water injection passage 122a, and an outer surface of the first water injection pipe 122 having a second guide surface 122 b. When the nozzle mount 120 is mounted on the hand piece 110, the cover body 121 covers the coupling part 112 and the water inlet 11a, the second guide surface 122b contacts the first guide surface 112a, and when the nozzle mount 120 is mounted, the second guide surface 122b can slide on the first guide surface 112a to make the water filling passage 122a abut against the water inlet 11a, and the water filling passage 122a is used for communicating with the outside, so that the cleaning water and the cleaning liquid can sequentially enter the water tank 230 through the water filling passage 122a and the water inlet 11 a.

In the sliding process, the first guide surface 112a and the second guide surface 122b are contacted and matched with each other to guide the moving direction of the second guide surface 122b, and further guide the moving direction of the nozzle mounting member 120, when the nozzle mounting member 120 moves to be connected with the handheld main body 111, the water injection channel 122a can be butted with the water inlet 11a, and the nozzle mounting member 120 can be butted with other structures of the handheld member 110, so that the operation is convenient. The first guide surface 112a is located on the outer surface of the sleeve-joint part 112, the second guide surface 122b is located on the outer surface of the first water injection pipe 122, and before butt joint, the first guide surface 112a and the second guide surface 122b are both located in an open environment, so that the shapes of the first guide surface 112a and the second guide surface 122b can be observed conveniently, the angle of the nozzle mounting piece 120 can be adjusted, and the first guide surface 112a and the second guide surface 122b can be aligned quickly. In addition, the first water injection pipe 122 is a structural member for guiding the cleaning water and the cleaning liquid into the water tank 230, and when the position of the guide surface for guiding the movement of the nozzle 210 is designed, the outer surface of the first water injection pipe 122 is directly used, and it is not necessary to provide another structural member for guiding the movement direction of the nozzle mounting member 120, which effectively simplifies the structure of the housing 100.

The first guide surface 112a and the second guide surface 122b may be provided to extend in the first direction a so that the second guide surface 122b can slide back and forth in the first direction a relative to the first guide surface 112a, and correspondingly, the nozzle mount 120 can be moved in the direction opposite to the first direction a to be coupled to the hand-held body 111, thereby mounting the nozzle mount 120 in place in one step. Of course, in other embodiments, other paths of moving the nozzle mount 120 may be used to mount the nozzle mount 120 to the main body 111, for example, moving the nozzle mount 120 in a direction forming an angle with the first direction a to contact the first guide surface 112a with the second guide surface 122b, moving the nozzle mount 120 in a direction opposite to the first direction a to mount the nozzle mount 120 to the main body 111, and contacting the water filling channel 122a with the water inlet 11 a.

Optionally, the first guide surface 112a and the second guide surface 122b are adapted, so that when the first guide surface 112a contacts with the second guide surface 122b, the first guide surface 112a and the second guide surface 122b can completely fit, the connection stability of the first guide surface 112a and the second guide surface 122b is improved, and the guide nozzle mounting member 120 can be smoothly moved to be connected with the handheld body 111.

As an alternative embodiment, as shown in fig. 4, the first guide surface 112a may also be partially in contact with the second guide surface 122b, and may also guide the nozzle mount 120 to smoothly slide into connection with the hand-held body 111, for example, a middle region of the first guide surface 112a may be disposed in contact with a middle region of the second guide surface 122b, an edge region of the first guide surface 112a may be disposed in contact with an edge region of the second guide surface 122b, or the first guide surface 112a and the second guide surface 122b may be disposed in contact with a partial region adjacent to or away from the hand-held body 111 in the first direction a, or the like.

Further, the first guiding surface 112a is a concave surface that is curved in a direction away from the first water injection pipe 122, and more space is reserved on a side where the first guiding surface 112a of the socket 112 is located, so as to accommodate the first water injection pipe 122. As shown in fig. 2, the first guide surface 112a has two first edges 112c disposed opposite to each other in a second direction B perpendicular to the first direction a, and the distance between the two first edges 112c may be equal and the distance between the two first edges 112c may gradually decrease in the first direction a.

Preferably, in the first direction a, the distance between the two first edges 112c may be gradually decreased, and the peripheral size of the socket 112 far from the handheld body 111 is smaller than the peripheral size of the socket 112 near the handheld body 111, so that the head structure of the socket 112 far from the handheld body 111 is small and the housing 100 presents a structure with gradually decreased peripheral size in the first direction a.

Alternatively, the first water injection pipe 122 is a strip pipe, and the length direction of the first water injection pipe 122 is parallel to the first direction a, and correspondingly, the water injection channel 122a in the first water injection pipe 122 is a strip channel arranged parallel to the first direction a, so as to form a smooth and simple transmission path, which facilitates the cleaning water and the cleaning solution to smoothly enter the water inlet 11 a. The first water injection pipe 122 is provided in the cap body 121, and the first water injection pipe 122 is provided in a bar shape, so that the first water injection pipe 122 is easily butted against the water inlet 11a when the nozzle mount 120 moves in the direction opposite to the first direction a, and at the same time, the inner space of the cap body 121 is easily saved,

as shown in fig. 2, in a plane perpendicular to the longitudinal direction of the first water injection pipe 122, the first guide surface 112a is curved with a curvature gradually decreasing from the central region to the edge region, so that the first guide surface 112a forms a concave curved surface, and the second guide surface 122b may be provided as a convex curved surface adapted to the first guide surface 112a, so that when the first guide surface 112a and the second guide surface 122b are fitted to each other, the movement direction of the nozzle mounting member 120 may be guided, and the edge region of the first guide surface 112a and the edge region of the second guide surface 122b may limit the middle region, thereby playing a role of clamping and fixing, and enabling the connection between the nozzle mounting member 120 and the hand-held part to be more tight and firm.

The second guide surface 122b is a convex surface curved toward the sleeve part 112, and the wall surface of the water injection passage 122a adjacent to the second guide surface 122b is a curved surface curved toward the sleeve part 112, so that the space of the water injection passage 122a is enlarged by fully utilizing the inner space of the cover body 121, and the cleaning water and the cleaning liquid can more smoothly pass through the water injection passage 122 a.

The handpiece 110 further includes a second water injection pipe 113 extending out of the handpiece body 111, the second water injection pipe 113 surrounding the water inlet 11 a. A drainage channel may be provided in the second water injection pipe 113, and the water inlet 11a is located at one end of the drainage channel facing the hand-held body 111. The first water injection pipe 122 and the second water injection pipe 113 may be provided to be connected to end portions far away from the hand-held body 111 to dock the water injection passage 122a with the water inlet 11a, or the first water injection pipe 122 may be provided to extend at least into the second water injection pipe 113 to dock with the water inlet 11 a.

Preferably, the first water injection pipe 122 is partially extended into the second water injection pipe 113 to be butted with the water inlet 11a, and the outer surface of the first water injection pipe 122 is connected with the wall surface of the internal flow channel of the second water injection pipe 113, so as to improve the butting stability of the first water injection pipe 122 and the water inlet 11 a. The cleaning water and the cleaning liquid introduced into the filling channel 122a can directly reach the water inlet 11a through the filling channel 122a, preventing the liquid from overflowing. Meanwhile, the first water injection pipe 122 is inserted into the second water injection pipe 113, and is also convenient to be matched with the first guide surface 112a and the second guide surface 122b, so that two butt joint structures exist in the cover body 121, and the installation stability of the nozzle installation part 120 and the handheld main body 111 is further improved.

The outer wall surface of the second water injection pipe 113 and the first guide surface 112a may be spaced apart. Alternatively, the outer wall surface of the second water injection pipe 113 may be provided to be connected to the first guide surface 112a, i.e., the second water injection pipe 113 may be connected to the first guide surface 112a at a region close to the grip body 111, to make the structure compact.

When the first water injection pipe 122 is partially inserted into the water inlet 11a, the first water injection pipe 122 may be provided to include a first section 1221 connected to the cover body 121, and a second section 1222 connected to the first section 1221, an outer surface of the first section 1221 forming a second guide surface 122b, and the second section 1222 inserted into the water inlet 11 a. In the length direction of the first water injection pipe 122, the projection of the first section 1221 may be set to entirely cover the projection of the second section 1222, and optionally, the outer peripheral dimension of the projection of the first section 1221 may be set to be larger than the outer peripheral dimension of the projection of the second section 1222, so that the second guide surface 122b of the outer surface of the first section 1221 contacts the first guide surface 112a when the second section 1222 is inserted into the second water injection pipe 113.

The case 100 further includes a water filling sealing member 130, a sealing groove 122c is formed on an outer surface of the second section 1222, the water filling sealing member 130 is disposed in the sealing groove 122c, and the water filling sealing member 130 abuts against a wall surface of the water inlet 11a, so that the first water filling pipe 122 is sealingly inserted in the second water filling pipe 113, and the cleaning water and the cleaning liquid are prevented from being sprayed outside. The sealing groove 122c may improve the installation stability of the water filling sealing member 130 so that the water filling sealing member 130 may be tightly fastened to the periphery of the first water filling pipe 122 when the first water filling pipe 122 is unplugged and inserted.

Alternatively, the handheld body 111, the socket 112 and the second water injection pipe 113 may be integrally injection molded by using the same material.

The nozzle mount 120 further includes a locking flange 140 connected to the cover 121, the locking flange 140 is disposed toward the handheld body 111, the handheld body 111 has a locking groove 11b corresponding to the locking flange 140, the locking groove 11b is surrounded on the periphery of the sleeve portion 112 and the water inlet 11a, and the locking flange 140 is inserted into the locking groove 11b, so as to facilitate the pre-positioning connection between the nozzle mount 120 and the handheld body 111.

Further, the engaging flange 140 may be an annular flange, and the engaging groove 11b may be an annular groove, so that the engaging flange 140 can be inserted into the engaging groove 11b more smoothly. The engaging groove 11b has a depth opposite to the first direction a, and when the engaging flange 140 is inserted into the engaging groove 11b, the engaging flange 140 can contact with the bottom wall of the engaging groove 11b, thereby improving the stability of the nozzle mount 120 mounted on the handheld body 111. At this time, the depth of the engaging groove 11b in the direction opposite to the first direction a may be designed in advance to adjust the mounting position of the nozzle mount 120 with respect to the hand-held body 111.

It should be noted that when the engaging flange 140 is inserted into the engaging groove 11b, there may be a situation that part of the water vapor enters the inner space of the cover 121 from the engaging groove 11b, and in order to prevent the liquid from remaining, the handheld body 111 may further be formed with a water drainage groove 11c communicated with the engaging groove 11b, and the water drainage groove 11c extends to the periphery of the connection between the cover 121 and the handheld body 111, so that the water vapor entering the cover 121 may be drained from the water drainage groove 11 c.

In some other embodiments, a clamping sealing member (not shown) may be disposed in the clamping groove 11b, and the clamping flange 140 abuts against the clamping sealing member to form a sealing structure at the clamping groove 11b to prevent moisture from entering the inner space of the cover 121, for example, the clamping sealing member may be a ring-shaped sealing member, and the clamping sealing member is disposed inside the clamping flange 140 and abuts against the wall surface of the clamping groove 11b to achieve sealing.

As shown in fig. 5, the nozzle mounting member 120 further includes a positioning post 123 disposed in the cover 121, the handheld main body 111 is provided with an insertion groove 11d corresponding to the positioning post 123, the positioning post 123 extends into the insertion groove 11d, and a wall surface of the positioning post 123 contacts a wall surface of the insertion groove 11d, so that the positioning post 123 can be fixed in the insertion groove 11d, and the mounting stability of the nozzle mounting member 120 after being abutted to the handheld main body 111 is further improved.

The nozzle mounting member 120 has a plurality of positioning pillars 123, the positioning pillars 123 are disposed adjacent to the connection portion between the nozzle mounting member 120 and the handheld body 111, and the positioning pillars 123 are uniformly distributed, that is, the positioning pillars 123 are disposed adjacent to the engaging flange 140, so as to improve the mounting stability of the engaging flange 140 mounted in the engaging groove 11b, so that the portion of the nozzle mounting member 120 connected to the handheld body 111 is located in a relatively peripheral region, and the connection stability between the nozzle mounting member 120 and the handheld body 111 is sufficiently improved. Meanwhile, the installation space of the positioning column 123 is reasonably planned to reserve the central area for installing other structures in the tooth flushing device 200.

Optionally, threaded holes are coaxially formed in the positioning column 123 and the bottom wall of the insertion slot 11d, and screws are disposed in the threaded holes to fix the positioning column 123 in the insertion slot 11d, so that the nozzle mounting member 120 can be stably mounted on the hand piece 110. When the screw is installed, the screw can be firstly placed on one side of the handheld main body 111 departing from the nozzle installation part 120, and then the screw is moved along the first direction a, so that the screw sequentially passes through the threaded hole communicated with the bottom wall of the insertion groove 11d and the threaded hole in the positioning column 123, and the locking and fixing are completed.

As shown in fig. 6, the housing 100 may further include a cover 150 coupled to the nozzle mount 120, the cover 150 for enclosing the water filling channel 122 a.

As shown in fig. 7 and 8, the embodiment of the present application further provides a dental irrigator 200, and the dental irrigator 200 comprises the housing 100, the nozzle 210, the infusion drive assembly 220 and the water tank 230 as described above. The hand piece 110 that can set up casing 100 has the installation cavity, the installation cavity is including locating the first cavity 101a in handheld main part 111, locate the inside second cavity 101b of portion 112 that cup joints, second cavity 101b and first cavity 101a intercommunication, water tank 230 can hold in first cavity 101a, water tank 230 has water inlet 231, water tank 230's water inlet 231 and the water inlet 11a intercommunication of handheld main part 111, the user can pour into water tank 230 with cleaning solution and cleaning water through water filling channel 122a, water inlet 11a and water inlet 231 in proper order. The infusion driving assembly 220 can be partially accommodated in the first cavity 101a and partially accommodated in the second cavity 101b, and the infusion driving assembly 220 is fixed in the hand piece 110, and meanwhile, the infusion driving assembly 220 can be respectively communicated with the nozzle 210 and the water tank 230 so as to deliver the cleaning solution and the cleaning water in the water tank 230 to the nozzle 210 for ejection.

The end of the sleeve 112 away from the hand-held body 111 can be opened with an installation opening 112b, the cover 121 can be provided with a nozzle opening 121a corresponding to the installation opening 112b, the nozzle 210 can be connected to the infusion driving assembly 220, and after sequentially passing through the installation opening 112b and the nozzle opening 121a, the cover 121 is extended in the direction away from the hand-held piece 110, so that the nozzle 210 extends into the oral cavity of the user to clean the oral cavity of the user.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the above terms can be understood according to the specific situation by those skilled in the art.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (16)

1. A housing for a dental irrigator, comprising:

the handheld piece comprises a handheld main body and a sleeve joint part connected to the handheld main body, wherein the sleeve joint part extends along a first direction, the handheld main body is provided with a water inlet, the water inlet is opened towards the first direction, and the outer surface of the sleeve joint part facing the water inlet is a first guide surface; and

the nozzle mounting piece comprises a cover body and a first water injection pipe arranged in the cover body, the first water injection pipe is provided with a water injection channel, and the outer surface of the first water injection pipe is provided with a second guide surface; when the nozzle mounting piece is mounted on the handheld piece, the cover body covers the sleeve joint part and the water inlet, the second guide surface is in contact with the first guide surface, and when the nozzle mounting piece is mounted, the second guide surface can slide on the first guide surface to enable the water injection channel to be in butt joint with the water inlet.

2. The housing of claim 1, wherein the first guide surface is adapted to the second guide surface, the first guide surface being a concave surface curved away from the first water injection pipe.

3. The housing of claim 2 wherein the first water injection tube is a bar tube; in a plane perpendicular to the length direction of the first water injection pipe, the first guide surface is bent from the central area to the edge area in a way that the curvature is gradually reduced, so that the first guide surface forms a concave curved surface.

4. The housing of claim 2, wherein the second guide surface is a convex surface curved toward the socket part, and a wall surface of the water injection passage adjacent to the second guide surface is a curved surface curved toward the socket part.

5. The case of claim 1, further comprising a second fill tube extending from the hand held body, the second fill tube enclosing the water inlet.

6. The case of claim 5, wherein the second water injection tube is connected to a region of the first guide surface adjacent to the hand-held body.

7. The housing of claim 5 wherein the first water injection tube is at least partially inserted within the water inlet.

8. The housing of claim 7 wherein the first water injection tube includes a first section connected to the cover and a second section connected to the first section, the outer surface of the first section forming the second guide surface, the second section being inserted into the water inlet.

9. The housing of claim 8, further comprising a water injection sealing member, wherein a sealing groove is formed on an outer surface of the second section, the water injection sealing member is disposed in the sealing groove, and the water injection sealing member abuts against a wall surface of the water inlet.

10. The housing of claim 1, wherein the nozzle mount further comprises a locking flange connected to the cover, the locking flange is disposed toward the handheld body, the handheld body has a locking groove corresponding to the locking flange, the locking groove is disposed around the socket portion and the water inlet, and the locking flange is inserted into the locking groove.

11. The casing of claim 10, wherein the handheld body is further formed with a drainage channel communicated with the engaging channel, and the drainage channel extends to the periphery of the connection between the cover and the handheld body.

12. The housing according to any one of claims 1-11, wherein the nozzle mount further comprises a positioning post disposed in the cover body, the handheld body has an insertion groove corresponding to the positioning post, the positioning post extends into the insertion groove, and a wall surface of the positioning post contacts a wall surface of the insertion groove.

13. The housing of claim 12, wherein the nozzle mount has a plurality of the positioning posts disposed adjacent to a connection of the nozzle mount to the hand-held body, and the positioning posts are evenly distributed.

14. The housing of claim 12, wherein the positioning post and the bottom wall of the insertion slot are coaxially provided with threaded holes, and screws are disposed in the threaded holes to fix the positioning post in the insertion slot.

15. A dental irrigator, comprising:

the housing according to any one of claims 1 to 14.

16. The dental irrigator of claim 15 wherein said shroud of said housing has a nozzle opening and said handpiece of said housing has a mounting cavity; the tooth irrigator further comprises:

the nozzle penetrates through the nozzle opening and extends out of the cover body in the direction away from the handheld piece; and

the water tank is arranged in the mounting cavity and provided with a water inlet which is communicated with the water inlet.

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