CN215688645U

CN215688645U - Tooth flushing device

Info

Publication number: CN215688645U
Application number: CN202121909754.0U
Authority: CN
Inventors: 关军伟
Original assignee: Guangzhou Stars Pulse Co Ltd
Current assignee: Guangzhou Stars Pulse Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-01
Anticipated expiration: 2031-08-13

Abstract

The application discloses towards tooth ware relates to oral care technical field. The tooth flushing device comprises a nozzle and a fixing component, wherein the nozzle comprises a nozzle main body and a connecting part which are connected; the fixing component is arranged on the host, is arranged on the outer side of the connecting part in a surrounding manner, is connected with the connecting part so as to install the nozzle on the host, and is provided with a first stress surface group arranged around the connecting part; at least one part of the first force-bearing surface group inclines towards the direction close to the axis of the nozzle gradually from the position close to the nozzle main body to the position far away from the nozzle main body, when the connecting part receives the extrusion acting force applied by the fixing assembly along the direction vertical to the axis of the nozzle, the connecting part is abutted against the first force-bearing surface group, and the abutting position of the connecting part and the first force-bearing surface group at least extends along the axis direction of the nozzle. The utility model provides a tooth flushing device can reduce the cracked probability of the connecting portion of nozzle.

Description

Tooth flushing device

Technical Field

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

Background

The tooth flushing device is an auxiliary tool for cleaning the oral cavity, and can clean the interior of the oral cavity by using pulse water flow. The tooth flushing device generally comprises a spray head and a main machine, wherein one end of the spray head is connected to the main machine.

However, in the prior art, the matching surface of the main machine and the spray head is usually a cylindrical surface, when the tooth flushing device falls laterally or is impacted laterally, the acting force of the main machine on the spray head is usually concentrated on one point and is close to the edge of the part of the spray head used for connecting the main machine, so that the problem of breakage of the connecting part of the spray head is easily caused.

SUMMERY OF THE UTILITY MODEL

The application provides a tooth flushing device, which can reduce the probability of breakage of the connecting part of the nozzle.

The present application provides:

a dental irrigator comprising:

a nozzle including a nozzle body and a connection part connected to each other; and

the nozzle is arranged on the main machine, a fixing component is arranged on the main machine and surrounds the outer side of the connecting part, the fixing component is connected with the connecting part so as to install the nozzle on the main machine, and a first stress surface group arranged around the connecting part is formed on the fixing component;

at least a part of the first force bearing surface group is gradually inclined towards the direction close to the axis of the nozzle from the position close to the nozzle body to the position far away from the nozzle body;

when the connecting part receives the extrusion acting force applied by the fixing component along the direction vertical to the axis of the nozzle, the connecting part is abutted to the first force-bearing surface group, and the abutting position of the connecting part and the first force-bearing surface group at least extends along the axis direction of the nozzle.

In some possible embodiments, the first force-bearing surface group includes a first force-bearing surface and a second force-bearing surface along an axial direction of the nozzle, and the first force-bearing surface is disposed closer to the nozzle body than the second force-bearing surface.

In some possible embodiments, the first force-bearing surface is disposed obliquely with respect to an axial direction of the nozzle;

the first force bearing surface is gradually inclined towards the direction close to the axis of the nozzle from the position close to the nozzle body to the position far away from the nozzle body.

In some possible embodiments, the angle α between the first force-bearing surface and the nozzle axis is: alpha is more than or equal to 0.1 degree and less than or equal to 3 degrees.

In some possible embodiments, the second force-bearing surface is disposed obliquely with respect to the axial direction of the nozzle;

the second force bearing surface gradually inclines towards the direction far away from the axis of the nozzle from the position close to the first force bearing surface to the position far away from the first force bearing surface.

In some possible embodiments, the angle β between the second force-bearing surface and the nozzle axis is: beta is more than or equal to 0.1 degree and less than or equal to 3 degrees;

and/or the maximum distance between the inner wall surface of the first force bearing surface group and the outer peripheral wall of the connecting part is 0-0.8 mm.

In some possible embodiments, a gap is provided between the second force bearing surface and the connecting portion.

In some possible embodiments, the fixing assembly includes a mounting base and a support cover plate, both of which are disposed around the connecting portion;

along the axis direction of nozzle, support the apron for the mounting base is close to the nozzle main part sets up, support the apron with the mounting base is inserted and is closed and be connected.

In some possible embodiments, a step surface is formed at a joint of the connecting portion and the nozzle body, the step surface is arranged away from the nozzle body, and the step surface abuts against the support cover plate.

In some possible embodiments, the connecting portion includes a locking groove, and the locking groove is connected with the fixing component in a clamping manner so as to limit the fixing component in the axial direction of the nozzle;

along the axis direction of the nozzle, the first force-bearing surface group comprises a first force-bearing surface and a second force-bearing surface, wherein at least one part of the first force-bearing surface is positioned on one side of the clamping groove close to the nozzle body, at least one part of the second force-bearing surface is positioned on one side of the clamping groove far away from the nozzle body, and the first force-bearing surface is arranged close to the nozzle body compared with the second force-bearing surface.

In some possible embodiments, in the axial direction of the nozzle, a distance between a midline of the clamping groove and an end face of the nozzle body, which is close to the connecting part, is smaller than a distance between a midline of the clamping groove and an end face of the connecting part, which is far from the nozzle body.

In some possible embodiments, the fixing component includes a snap-fit member, and the snap-fit member is snap-fit connected with the slot.

In some possible embodiments, the engaging member is in floating engagement with the engaging groove in a direction perpendicular to the nozzle axis.

In some possible embodiments, the tooth irrigator further comprises a sealing ring, and the sealing ring is connected between the connecting part and the fixing component in a sealing mode.

In some possible embodiments, the fixing assembly further includes a fixing seat, the fixing seat is sleeved on one end of the connecting portion away from the nozzle body, and the sealing ring abuts between the connecting portion and the fixing seat.

In some possible embodiments, the first force-bearing surface group includes a third force-bearing surface, and the third force-bearing surface is disposed on an inner wall of the fixing seat opposite to the connecting portion.

In addition, a dental irrigator comprising:

the nozzle is arranged on the main machine, the main machine is provided with a fixing component, the fixing component is arranged on the outer side of the connecting part in a surrounding mode, the fixing component is connected with the connecting part so as to install the nozzle on the main machine, a first stress surface group arranged around the connecting part is formed on the fixing component, and the connecting part comprises a second stress surface group opposite to the first stress surface group;

at least a part of the first force bearing surface group is gradually inclined towards the direction close to the axis of the nozzle from the position close to the nozzle body to the position far away from the nozzle body; or

At least a part of the second force bearing surface group is gradually inclined to a direction far away from the axis of the nozzle from a position close to the nozzle body to a position far away from the nozzle body;

when the connecting part receives the extrusion acting force applied by the fixing assembly along the direction vertical to the axis of the nozzle, the first force-bearing surface group is abutted with the second force-bearing surface group, and the abutting position of the first force-bearing surface group and the second force-bearing surface group at least extends along the axis direction of the nozzle.

The beneficial effect of this application is: the application provides a towards tooth ware, towards tooth ware including nozzle and host computer, wherein, the nozzle is provided with fixed subassembly including continuous nozzle main part and connecting portion on the host computer, and the connecting portion outside is located to the fixed subassembly cover, and fixed subassembly can be used to install the nozzle on the host computer. The inner wall of the fixing component is provided with a first stress surface group surrounding the connecting part. At least a part of the first force bearing surface group is gradually inclined towards the direction close to the axis of the nozzle from the position close to the nozzle body to the position far away from the nozzle body. When the connecting part is subjected to the extrusion acting force applied by the fixing component along the direction vertical to the axis of the nozzle, the abutting position of the connecting part and the first force bearing surface group extends at least along the axis of the nozzle.

Thus, when the tooth flusher is dropped or impacted laterally, the connecting portion of the nozzle can be inclined and impact on the first force bearing surface group of the fixing assembly. Simultaneously, because of the slope setting of first stress surface group, in the direction that is on a parallel with the nozzle axis, can be so that be at least the line butt between connecting portion and the first stress surface group. On one hand, the impact force applied to the connecting part can be dispersed along the axis of the nozzle so as to weaken the impact force applied to the local part of the connecting part. On the other hand, in the axial direction of the nozzle, the connecting part is in line contact with the first force bearing surface group at least, so that the length of the force arm of the connecting part subjected to the impact force can be shortened, and the corresponding moment is reduced. Therefore, the probability of breakage of the nozzle connecting part can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic partial cross-sectional view of a dental irrigator in some embodiments;

FIG. 2 is a partially enlarged schematic view of a portion A of FIG. 1;

FIG. 3 is a partially enlarged schematic view of a portion B of FIG. 2;

FIG. 4 is a partial enlarged schematic view of a portion C of FIG. 2;

FIG. 5 is a partial schematic view of the tooth irrigator in some embodiments when impacted;

FIG. 6 shows a schematic structural view of a nozzle in some embodiments;

FIG. 7 shows a schematic cross-sectional view of a nozzle in some embodiments;

FIG. 8 illustrates a perspective view of a mounting base in some embodiments;

FIG. 9 illustrates a cross-sectional structural view of a mounting base in some embodiments;

FIG. 10 illustrates a perspective view of a snap member in some embodiments;

FIG. 11 is a schematic cross-sectional view of a holder according to some embodiments;

figure 12 illustrates a partial explosion structural schematic of the dental irrigator in some embodiments.

Description of the main element symbols:

10-a nozzle; 10 a-a water inlet; 10 b-a water outlet; 11-a connecting portion; 11 a-a second force-bearing surface group; 111-card slot; 1121-fifth force-bearing surface; 1122-fourth force-bearing surface; 1123-eighth force-bearing surface; 113-step surface; 12-a nozzle body; 13-a channel; 131-a transmission segment; 132-a spray section; 20-a stationary component; 20 a-a first force-bearing surface group; 21-supporting the cover plate; 211-a first force-bearing surface; 212-sixth force-bearing surface; 213-a mating slot; 214-third mounting hole; 22-a mounting base; 221-a second force-bearing surface; 222-a first mounting hole; 2221-first order hole; 2222-second order hole; 223-avoiding holes; 224-connecting block; 225-boss; 23-a catch; 231-an insertion block; 2311-the seventh stress surface; 232-second mounting hole; 233-an elastic member; 24-a fixed seat; 241-a third force-bearing surface; 242-fourth mounting hole; 243-notch; 30-an abutment position; 40-a sealing ring; 50-an execution bond; 61-an upper shell; 62-mounting plate; 100-host computer.

Detailed Description

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

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, 2 and 12, an embodiment of the present invention provides a tooth-rinsing device, which may include a nozzle 10 and a main body 100 connected to each other. Wherein, the main body 100 is provided with a fixing component 20, the fixing component 20 can be used for stably mounting the nozzle 10 on the main body 100, and the probability of the nozzle 10 breaking when the tooth flusher is impacted laterally is reduced.

In some embodiments, the stationary component 20 may be part of the host 100.

Of course, in other embodiments, the fixing member 20 may be a member connected to the main body 100, and the connection between the nozzle 10 and the main body 100 may be realized.

Referring to fig. 6 and 7 together, the nozzle 10 may include a connecting portion 11 and a nozzle body 12 connected to each other, and the connecting portion 11 may be connected to one end of the nozzle body 12. In some embodiments, the connecting portion 11 may be integrally formed with the nozzle body 12, and the connecting portion 11 and the nozzle body 12 may be integrally formed by injection molding, pouring, or the like.

In other embodiments, the connection portion 11 and the nozzle body 12 may also be separately disposed, and the connection portion 11 and the nozzle body 12 may be fixedly connected by interference fit, screwing, welding, bonding, or the like.

The connecting portion 11 may be used to connect the fixing member 20 to achieve the connection of the nozzle 10 with the fixing member 20. Specifically, the fixing element 20 may be fixedly sleeved outside the connecting portion 11, that is, the connecting portion 11 is fixedly inserted into the fixing element 20. This enables connection between the connection portion 11 and the main unit 100, that is, connection between the nozzle 10 and the main unit 100.

The nozzle body 12 may have a length to facilitate a user to insert the end of the nozzle 10 remote from the main body 100 into the mouth to facilitate cleaning of the user's mouth. For example, the length of the nozzle body 12 may be set as desired, and is not particularly limited herein.

It will be appreciated that the fixing member 20 may include an inner wall opposite to the connecting portion 11, and accordingly, the inner wall of the fixing member 20 is formed with a first force-bearing surface group 20a disposed around the connecting portion 11. Meanwhile, the first force-bearing surface group 20a extends along the direction of the axis of the connecting portion 11, wherein the axis of the connecting portion 11 is the axis L of the nozzle 10, and the axial direction of the nozzle 10 and the axial direction of the connecting portion 11 can both refer to the extending direction of the axis L.

Referring again to fig. 5, when the dental irrigator is impacted laterally, a compressive force is generated between the fixing member 20 and the connecting portion 11. When the connecting portion 11 receives a pressing force applied by the fixing component 20 in a direction perpendicular to the axis L, the connecting portion 11 contacts the first force-bearing surface group 20a of the fixing component 20, and an abutting position 30 is formed between the connecting portion 11 and the first force-bearing surface group 20 a.

In some embodiments, at least a portion of the first force-bearing surface set 20a gradually slopes in a direction toward the axis L of the nozzle 10 from a position near the nozzle body 12 to a position away from the nozzle body 12.

When the connecting portion 11 abuts against the first force-bearing surface group 20a, the abutting position 30 of the connecting portion 11 and the first force-bearing surface group 20a may extend at least along the axial direction of the connecting portion 11. That is, when the connection portion 11 and the fixing member 20 are laterally pressed, the connection portion 11 and the first force receiving surface group 20a are in at least line contact with each other. The extrusion force applied to the connecting portion 11 in the direction perpendicular to the axis L during the lateral impact may be a resultant force of forces in all directions during the impact, or a component force of a force in a certain direction.

When the tooth punching device is impacted laterally, the line contact is formed between the connecting part 11 and the first force bearing surface group 20a along the axial direction of the connecting part 11, on the one hand, the acting force between the connecting part 11 and the fixing assembly 20 can be dispersed along the abutting position 30 between the connecting part 11 and the first force bearing surface group 20a, and therefore the acting force locally received by the connecting part 11 can be weakened. On the other hand, the arm length of the urging force received by the connecting portion 11 can be shortened. Along with the reduction of the local acting force of the connecting part 11 and the shortening of the force arm, the corresponding moment can be obviously reduced, and the breaking probability of the connecting part 11 can be reduced, for example, the breaking probability of the connecting part 11 can be reduced when the tooth flusher falls off.

Therefore, the tooth flushing device provided by the application can effectively reduce the breakage probability of the connecting part 11 of the nozzle 10 when the tooth flushing device is impacted laterally, thereby prolonging the service life of the nozzle 10 and improving the use experience of a user.

Further, as shown in fig. 6 and 7, a passage 13 for flowing water may be provided in the nozzle 10, and the passage 13 may be provided through the connection part 11 and the nozzle body 12. In some embodiments, the water stream circulating within channel 13 may be tap water or a water stream mixed with a mouth cleaning solution, or the like.

It will be appreciated that the channel 13 is open at both ends for the input and output of water. Correspondingly, the nozzle 10 may include an inlet 10a and an outlet 10b, which correspond to the opening structures at the two ends of the channel 13. Specifically, the water inlet 10a may be located at an end of the connection part 11 away from the nozzle body 12, and the water outlet 10b may be located at an end of the nozzle body 12 away from the connection part 11.

In some embodiments, the channel 13 may include a transmission section 131 and a spraying section 132 which are communicated, wherein the spraying section 132 may be disposed at an end of the nozzle body 12 far away from the connection portion 11, that is, the spraying section 132 is disposed near the water outlet 10b of the nozzle 10, and the spraying section 132 may be used for spraying water flow outwards. The transmission section 131 may extend from one end of the water inlet 10a through the connection portion 11 to the nozzle body 12 to engage with the injection section 132. It will be appreciated that the axis L of the nozzle 10 may refer to the axis of the transport section 131.

In an embodiment, the diameter of the injection section 132 may be smaller than the diameter of the transmission section 131, so that the water flow can be throttled when entering the injection section 132 from the transmission section 131, thereby increasing the water pressure and improving the flushing effect.

Further, the outer side wall of the connecting portion 11 may be provided with a slot 111, that is, the slot 111 is disposed away from the axis L. The clamping groove 111 may be circumferentially disposed around the connecting portion 11, and the clamping groove 111 may have a circular groove structure. In an embodiment, the clamping groove 111 may be used to clamp the fixing component 20, so as to realize a limiting connection between the fixing component 20 and the connecting portion 11 in a direction parallel to the axis L. Thus, the connection part 11 can be prevented from being separated from the fixing member 20.

It will be appreciated that the water flow under the action of the main body 100 generates a certain water pressure, and when the water flow enters the nozzle 10 from the water inlet 10a, the water pressure will act on the connecting portion 11 of the nozzle 10, so that the connecting portion 11 will tend to separate from the fixed component 20. In the embodiment, in the direction parallel to the axial direction of the connecting portion 11, the connecting portion 11 can be effectively prevented from being separated from the fixing component 20 by the limit connection of the clamping groove 111 on the connecting portion 11 and the fixing component 20, that is, the nozzle 10 can be effectively prevented from being separated from the main machine 100, so that the user can smoothly use the tooth flushing device and can be prevented from being injured, and accordingly, the use experience of the user can be improved.

Referring to fig. 1, 2 and 12, in some embodiments, the fixing assembly 20 may include a supporting cover 21, a mounting base 22, a latch 23 and a fixing seat 24.

As shown in fig. 8 and 9, the mounting base 22 may be substantially cylindrical and is sleeved outside the connecting portion 11, and correspondingly, a first mounting hole 222 for the connecting portion 11 to pass through may be formed in the mounting base 22, and the first mounting hole 222 is coaxial with the connecting portion 11.

The first mounting hole 222 may be a stepped hole, and the first mounting hole 222 may include a first step hole 2221 and a second step hole 2222 that are communicated with each other, where the first step hole 2221 is disposed near one end of the nozzle body 12, and correspondingly, the second step hole 2222 is disposed at one end of the first step hole 2221 that is far from the nozzle body 12. The card slot 111 of the connecting portion 11 is disposed opposite to the first step hole 2221.

In some specific embodiments, the diameter of the first step hole 2221 is slightly larger than the diameter of the connection part 11, so that a gap may be formed between the inner wall of the first step hole 2221 and the connection part 11. When the tooth irrigator is subjected to a lateral impact force, the connecting portion 11 and the first step hole 2221 can move relatively to each other, and the outer side wall of the connecting portion 11 can hit the inner wall of the first step hole 2221.

Further, as shown in fig. 11, the fixing seat 24 may also be substantially cylindrical, the fixing seat 24 is sleeved on one end of the connecting portion 11 close to the water inlet 10a, and correspondingly, the fixing seat 24 is also provided with a fourth mounting hole 242 for mounting the connecting portion 11 therein. The fourth mounting hole 242 may be a through hole, one end of the connection portion 11 near the water inlet 10a may be inserted from one end of the fourth mounting hole 242, and the other end of the fourth mounting hole 242 may be correspondingly connected to a water supply mechanism in the main body 100 to supply water to the nozzle 10.

The fixing seat 24 may be interposed between the connecting portion 11 and the mounting base 22. Specifically, the diameter of the second step hole 2222 is greater than the diameter of the first step hole 2221, an annular accommodating cavity may be formed between the inner wall of the second step hole 2222 and the side wall of the connecting portion 11, and the fixing seat 24 may be inserted into the annular accommodating cavity. The outer diameter of the fixing seat 24 may be equal to the diameter of the second step hole 2222, and the outer side wall of the fixing seat 24 may be attached to the inner wall of the second step hole 2222. The end wall of the fixed seat 24 near one end of the nozzle body 12 can abut against a step plane formed between the first step hole 2221 and the second step hole 2222.

In some embodiments, the inner wall of the fixing seat 24 and the connecting portion 11 can be hermetically connected to avoid water leakage. Specifically, a sealing ring 40 is disposed between the fixing seat 24 and the connecting portion 11, and is used for sealing an assembly gap between the fixing seat 24 and the connecting portion 11. The end of the fixing seat 24 close to the nozzle body 12 is provided with a notch 243, and the notch 243 may be located at one side of the fixing seat 24 close to the connecting portion 11, so that the notch 243 may cooperate with the step plane on the first mounting hole 222 to form an annular groove structure, and an opening end of the groove structure faces the connecting portion 11.

The side of the sealing ring 40 away from the connecting portion 11 can be accommodated in the annular groove structure, and a side wall of the sealing ring 40 away from the connecting portion 11 can abut against an inner wall of the groove structure. Meanwhile, under the action of the fixing seat 24 and the mounting base 22, the sealing ring 40 can be fixed, the sealing ring 40 is prevented from being separated from the connecting part 11 due to random sliding, and the sealing connection between the fixing seat 24 and the connecting part 11 can be ensured.

It can be understood that the sealing ring 40 may be protruded relative to the annular groove structure, so that the sealing ring 40 is tightly attached to the outer side wall of the connecting portion 11, and correspondingly, the diameter of the mounting hole structure in the fixing seat 24 may also be slightly larger than the diameter of the connecting portion 11. Through the setting of sealing washer 40, also can make connecting portion 11 relatively fixed between fixing base 24, the mounting base 22, avoid nozzle 10 to rock at will for fixed subassembly 20.

In some embodiments, the end of the mounting block 24 remote from the nozzle body 12 may be fixedly mounted to a mounting plate 62 within the main body 100, and the mounting plate 62 is provided with a mounting hole structure for mounting the mounting block 24. The end of the mounting block 24 remote from the nozzle body 12 is adapted to pass through the mounting hole structure and communicate with a water supply mechanism in the main body 100 to deliver a flow of water to the nozzle 10. For example, the fixing base 24 and the mounting plate 62 may be connected by clamping, bonding, welding, screwing, integral molding, or the like. It can be understood that the fixed seat 24 and the mounting plate 62 are also connected in a sealing manner, and a corresponding sealing ring structure can be arranged between the fixed seat 24 and the mounting plate 62.

The end of the mounting base 22 away from the nozzle body 12 may also be fixedly mounted on the mounting plate 62, specifically, a connecting block 224 may be protruded from one side of the mounting base 22, the connecting block 224 may be locked on the mounting plate 62 by a screw, and correspondingly, a connecting hole for connecting the screw may be provided on the connecting block 224.

In other embodiments, attachment block 224 may be fixedly attached to mounting plate 62 by welding, adhesive, snap-fit, or the like.

As shown in fig. 2, 9 and 10, the engaging member 23 may have a substantially annular structure, the engaging member 23 may be disposed around the mounting base 22, and correspondingly, the engaging member 23 is provided with a second mounting hole 232 for the mounting base 22 to pass through. The engaging member 23 can be disposed at an end of the mounting base 22 close to the nozzle body 12 along the axial direction of the connecting portion 11. The other end of the mounting base 22 may be provided with a boss 225 protruding in a direction away from the connecting portion 11, and the boss 225 may be used to limit and support the engaging member 23, so as to realize stable assembly of the engaging member 23 and the mounting base 22.

The inner wall of the second mounting hole 232 is provided with an insertion block 231 in a protruding manner, and the insertion block 231 is extended from one side of the inner wall of the second mounting hole 232 to a direction close to the mounting base 22. It is understood that the insertion block 231 may be disposed in a segment extending along the inner wall of the second mounting hole 232 in the circumferential direction. The insertion block 231 is used for being clamped and connected with the clamping groove 111, correspondingly, an avoiding hole 223 for the insertion block 231 to pass through is formed in the corresponding position of the mounting base 22, and the insertion block 231 is inserted into the clamping groove 111 after passing through the avoiding hole 223.

In the direction parallel to the axis L, the size of the slot 111 may be equal to or slightly larger than the size of the insertion block 231, so as to limit the insertion block 231 in the corresponding direction, and prevent the insertion block 231 from moving freely relative to the slot 111. Correspondingly, in the direction parallel to the axis L, the size of the avoiding hole 223 may also be equal to or greater than the size of the insertion block 231, and the insertion block 231 may also be further limited in the corresponding direction while the insertion block 231 is ensured to pass through smoothly.

In some embodiments, the insertion block 231 is disposed in a floating manner with respect to the slot 111 in a direction perpendicular to the axis L, so that the insertion block 231 can be connected to or separated from the slot 111, and further, the insertion block 231 can lock or release the connection portion 11. During normal use, the connection between the insertion block 231 and the slot 111 can be used to axially limit the connection part 11, so as to prevent the nozzle 10 from being separated from the main body 100 at will. In case of breakage of the connection part 11 of the nozzle 10, the insertion block 231 may be separated from the catching groove 111 to release the connection part 11, so that the broken connection part 11 can be removed from the fixing member 20 to replace the nozzle 10 with a new one.

Referring to fig. 12 again, in some embodiments, the engaging element 23 can be floatingly mounted in the host 100 by the elastic element 233, and the floating direction of the engaging element 23 is perpendicular to the axis L of the connecting portion 11. Specifically, one end of the elastic element 233 may abut against an outer sidewall of the engaging element 23, and the elastic element 233 is disposed near a side of the engaging element 23 where the insertion block 231 is disposed. The other end of the elastic member 233 may abut against the inner wall of the housing of the host 100. When the elastic member 233 is not acted by an external force, the engaging member 23 can be stably inserted into the engaging groove 111 under the action of the elastic member 233, and in an embodiment, the elastic member 233 can be in a compressed state. When the connection portion 11 needs to be released, the engaging member 23 can be pushed to compress the elastic member 233, so that the inserting block 231 is separated from the slot 111, and the connection portion 11 is released. It will be appreciated that the inner diameter of the second mounting hole 232 may be larger than the outer diameter of the mounting base 22, so that the mounting base 22 can move relatively in the second mounting hole 232 to facilitate the disengagement of the insertion block 231 from the slot 111.

In other embodiments, the elastic member 233 may be in a natural extension state when the elastic member 233 is not subjected to an external force.

Of course, in other embodiments, the elastic member 233 can be fixedly connected to the side of the engaging member 23 away from the insertion block 231. The other end of the elastic member 233 may be fixedly coupled to the inner wall of the case of the main unit 100. The elastic member 233 can be in a stretched state, and the engaging member 23 is pulled by the elastic member 233 to be inserted into the connecting portion 11.

In other embodiments, the engaging member 23 can be made of flexible materials such as plastic, silicone, rubber, etc. The sidewall of the engaging member 23 close to the inserting block 231 can directly abut against the inner wall of the housing of the host 100, so that the inserting block 231 can be stably inserted into the slot 111 of the connecting portion 11. When the connecting portion 11 needs to be released, the locking member 23 can be pressed to be elastically deformed, so that the insertion block 231 is separated from the locking groove 111 to release the connecting portion 11.

Referring to fig. 1, in some embodiments, the tooth rinsing device further includes an actuating key 50, and the actuating key 50 can abut against an outer wall of the engaging member 23 on a side away from the elastic member 233. The user can push the engaging member 23 to move by operating the actuating key 50, so as to separate the insertion block 231 from the slot 111, and release the connecting portion 11 from the engaging member 23. It will be appreciated that in the dental irrigator, the side of the actuating key 50 remote from the catch 23 may be provided protruding from the housing of the main unit 100 to facilitate the user's access to the actuating key 50 for the relevant operation.

Further, a support cover plate 21 may be attached to an end of the connection portion 11 near the nozzle body 12. Specifically, the supporting cover plate 21 may also be sleeved outside the connecting portion 11, and correspondingly, the supporting cover plate 21 is provided with a third mounting hole 214 for the connecting portion 11 to pass through.

Meanwhile, the support cover plate 21 may be inserted into and coupled to an end of the mounting base 22 adjacent to the nozzle body 12. Correspondingly, one side of the supporting cover plate 21 close to the mounting base 22 is provided with an annular insertion groove 213, and one end of the mounting base 22 close to the nozzle body 12 is inserted into the insertion groove 213, so that the limiting connection between the mounting base 22 and the supporting cover plate 21, that is, the limiting connection in the direction perpendicular to the axis L, can be realized. Accordingly, the inner wall of the mounting base 22 near the end of the nozzle body 12 may be inclined away from the connecting portion 11, so that a corresponding assembly space is formed between the inner wall of the mounting base 22 near the end of the nozzle body 12 and the connecting portion 11, so as to facilitate the insertion and connection of the mounting base 22 and the insertion and connection groove 213 of the support cover 21.

In some embodiments, the supporting cover 21 may be a part of a housing of the host computer 100, and in particular, the supporting cover 21 may be an upper cover in the housing, and may close one end of the host computer 100. In some embodiments, the housing of the host 100 may include an upper housing 61 and a lower housing (not shown), and the upper housing 61 is connected with the lower housing to form a space for accommodating other structural components in the host 100. The support cover 21 may be connected to the end of the upper housing 61 remote from the lower housing by snap-fitting. In an embodiment, the actuating key 50 may be mounted on the upper case 61 in a protruding manner.

In an embodiment, the support cover 21 may be disposed opposite to the mounting plate 62 in the host 100, and an assembly space for mounting the base 22, the engaging member 23, and other structural members is formed between the support cover 21 and the mounting plate 62.

Further, as shown in fig. 2 to 7 and 12, a step structure is provided at the junction of the connecting portion 11 and the nozzle body 12, and a step surface 113 is formed. The step surface 113 may be disposed perpendicular to the axis L of the connection portion 11, with the step surface 113 facing the side of the water inlet 10 a. The step surface 113 of the connecting portion 11 may abut against a side of the supporting cover plate 21 away from the mounting base 22, and correspondingly, a sixth force-bearing surface 212 attached to the step surface 113 is disposed on the supporting cover plate 21, and the sixth force-bearing surface 212 may be disposed around the third mounting hole 214.

In some embodiments, the support cover 21 may be made of a plastic material. When the nozzle 10 receives an impact force in the axial direction, the impact force can be transmitted to the support cover plate 21 by the step surface 113 acting on the sixth force-receiving surface 212, and absorbed and dispersed by the support cover plate 21. Thus, the impact force to which the nozzle 10 is subjected is transferred and attenuated, thereby reducing the chance of damage to the nozzle 10 when subjected to axial impact forces.

Further, in some embodiments, the first force-bearing surface group 20a of the fixing member 20 may include a first force-bearing surface 211 and a second force-bearing surface 221, wherein the first force-bearing surface 211 may be disposed at an end of the connecting portion 11 close to the nozzle body 12, and the first force-bearing surface 211 may be located at a side of the locking groove 111 close to the nozzle body 12.

Of course, in other embodiments, the first force-bearing surface 211 may also extend from a side of the locking groove 111 close to the nozzle body 12 to a side of the locking groove 111 far from the nozzle body 12.

In some embodiments, the first force bearing surface 211 may be an inner wall of the third mounting hole 214 of the support cover 21. In the axial direction of the connecting portion 11, the first force receiving surface 211 may gradually incline toward the axis L of the connecting portion 11 from a position away from the card slot 111 to a position close to the card slot 111. That is, the third mounting hole 214 may have a substantially inverted conical shape. The first force bearing surface 211 and the axis of the connecting portion 11 may form an included angle α. Understandably, the auxiliary line L in FIG. 3₁May be parallel to the axis L of the connecting portion 11.

In some embodiments, the included angle α between the first force-bearing surface 211 and the axis L of the connecting portion 11 can be set to be 0.1 ° or more and 3 ° or less, which can adapt to the inclination angle of the connecting portion 11 during the falling of the tooth irrigator. For example, the included angle α between the first force-bearing surface 211 and the axis L may be set to 0.1 °, 1 °, 1.2 °, 2 °, 2.2 °, 2.5 °, 3 °, and so on.

In an embodiment, the connecting portion 11 is provided with a fifth force-bearing surface 1121 opposite to the first force-bearing surface 211, and the fifth force-bearing surface 1121 may be a cylindrical surface disposed around the axis L of the connecting portion 11. In an embodiment, a gap is disposed between the first force-bearing surface 211 and the fifth force-bearing surface 1121.

When the nozzle 10 and the fixing assembly 20 are laterally impacted and the lateral impact force is perpendicular to the axis L of the nozzle 10, for example, when the tooth punching device falls, the gap between the first force-bearing surface 211 and the fifth force-bearing surface 1121 can generate a buffer between the connecting portion 11 and the supporting cover plate 21, so as to reduce the probability of breakage of the connecting portion 11 of the nozzle 10.

Specifically, during the buffering process, the connection portion 11 may move relative to the support cover 21 until the fifth force-bearing surface 1121 of the connection portion 11 hits the first force-bearing surface 211 of the support cover 21. It will be appreciated that in the event of a fall of the dental irrigator, the securing assembly 20 will be preferentially impacted by the ground and stop moving or bounce in the opposite direction as compared to the nozzle 10. In this process, since the step surface 113 of the connecting portion 11 abuts against the supporting cover plate 21, when the connecting portion 11 moves relative to the supporting cover plate 21, frictional resistance is generated between the step surface 113 and the sixth force-bearing surface 212, and energy of the connecting portion 11 is consumed, so that collision force between the connecting portion 11 and the supporting cover plate 21 can be weakened, and the probability that the connecting portion 11 is broken due to excessive force is reduced.

In an embodiment, the second force-bearing surface 221 may extend at least partially to a side of the locking groove 111 away from the first force-bearing surface 211 in the axial direction of the connecting portion 11.

In some embodiments, in the axial direction of the connection portion 11, the second force-bearing surface 221 may extend from a side of the card slot 111 close to the first force-bearing surface 211 to a side of the card slot 111 far from the first force-bearing surface 211, and the second force-bearing surface 221 is located on a side of the first force-bearing surface 211 close to the card slot 111.

In other embodiments, the second force-bearing surface 221 may be completely disposed on a side of the clamping groove 111 away from the first force-bearing surface 211 along the axial direction of the connecting portion 11.

In some specific embodiments, the second force-bearing surface 221 may be an inner wall of the first step hole 2221 in the first mounting hole 222, and is disposed opposite to a side wall of the connecting portion 11.

The second force-bearing surface 221 may be disposed obliquely with respect to the axis L, i.e., the second force-bearing surface 221 may be disposed obliquely with respect to an outer sidewall of the connecting portion 11. Specifically, the second force-receiving surface 221 gradually inclines in a direction away from the axis L from a position close to the first force-receiving surface 211 to a position away from the first force-receiving surface 211. That is, the first step hole 2221 may be a substantially conical hole. In some embodiments, the angle β between the second force-bearing surface 221 and the axis L can be set to 0.1 ° ≦ β ≦ 3 ° to accommodate the inclination angle of the connection portion 11 during a fall of the dental irrigator. For example, the included angle β between the second force-bearing surface 221 and the axis L may be set to 0.1 °, 0.5 °, 0.8 °, 1 °, 1.3 °, 1.7 °, 2.2 °, 2.6 °, 3 °, and the like. Understandably, the auxiliary line L in FIG. 4₂Parallel to the axis L. The connecting portion 11 is further provided with a fourth force-receiving surface 1122 opposite to the second force-receiving surface 221, and the fourth force-receiving surface 1122 may be a cylindrical surface.

In an embodiment, the maximum distance between the inner wall surface of the first force-bearing surface group 20a and the outer peripheral wall of the connecting portion 11 may be set to 0-0.8mm, and exemplarily, the maximum distance between the inner wall surface of the first force-bearing surface group 20a and the outer peripheral wall of the connecting portion 11 may be set to 0.1mm, 0.3mm, 0.35mm, 0.4mm, 0.55mm, 0.6mm, 0.75mm, and the like.

Further, the first force-bearing surface group 20a may further include a third force-bearing surface 241, the third force-bearing surface 241 may be an inner wall of the fixing seat 24, and the third force-bearing surface 241 also disperses the impact force received by the connecting portion 11. In some embodiments, the third force-bearing surface 241 may be disposed parallel to the axis L, i.e., the third force-bearing surface 241 may be a cylindrical surface.

In other embodiments, the third force-bearing surface 241 may be disposed obliquely with respect to the axis L, and the third force-bearing surface 241 may be located on the same conical surface as the second force-bearing surface 221.

The first force-bearing surface group 20a further includes a seventh force-bearing surface 2311, and the seventh force-bearing surface 2311 may be an end surface of the insertion block 231 near one end of the slot 111. When the tooth flushing device is impacted laterally, the seventh force bearing surface 2311 can abut and support the eighth force bearing surface 1123 on the connecting part 11, so that the impact force applied to the connecting part 11 is further dispersed.

It will be appreciated that the end of the connecting portion 11 remote from the nozzle body 12 will typically tilt within the mounting assembly 20 during a fall of the dental irrigator. In the prior art, the inner wall of the mounting assembly for fixedly mounting the nozzle 10 is generally disposed parallel to the axis L of the nozzle 10, for example, the first force-bearing surface 211 of the supporting cover plate 21 is disposed parallel to the axis L, and the second force-bearing surface 221 of the mounting base 22 is disposed parallel to the axis L. During the falling process, the impact force between the connection portion 11 and the support cover 21 is usually concentrated at the intersection of the step surface 113 and the fifth force-bearing surface 1121, i.e., the impact force applied to the connection portion 11 by the support cover 21 is concentrated at one position of the connection portion 11, so that the end of the connection portion 11 close to the nozzle body 12 is subjected to a large impact force. Similarly, the edge of the end of the connecting portion 11 away from the nozzle body 12 may hit the second force-bearing surface 221 of the mounting base 22, and the impact force of the mounting base 22 against the connecting portion 11 is concentrated at the edge of the end of the connecting portion 11 away from the nozzle body 12, so that the end of the connecting portion 11 away from the nozzle body 12 is also subjected to a large impact force. Meanwhile, the connecting part 11 is subjected to impact force with a longer force arm. In this process, the connection portion 11 of the nozzle 10 is highly susceptible to breakage problems under large impact.

In the present application, gaps are provided between the first force-bearing surface 211, the second force-bearing surface 221, and the third force-bearing surface 241 and the connecting portion 11, and the engaging member 23 is float-mounted with respect to the mounting base 22, so that in the process of falling of the tooth, the connecting portion 11 can move with respect to the first force-bearing surface group 20a, and in this process, both the frictional resistance between the connecting portion 11 and the fixing component 20 and the resistance of the seal ring 40 can consume the energy of the connecting portion 11. Accordingly, the shock absorbing function is provided, and the impact force of the connecting portion 11 is also attenuated when the connecting portion 11 moves relative to the first force receiving surface group 20 a.

Meanwhile, because the first force-bearing surface 211 and the second force-bearing surface 221 are both arranged obliquely relative to the connecting portion 11, when one end of the connecting portion 11 far away from the nozzle body 12 is tilted, the connecting portion 11 can also be attached to the first force-bearing surface 211 along the axial direction of the connecting portion 11, and line abutment or surface abutment can be generated between the first force-bearing surface 211 and the connecting portion 11. It can be understood that, when the supporting cover plate 21 and the connecting portion 11 are deformed by an impact, a certain abutting width exists between the first force-bearing surface 211 and the connecting portion 11 in the circumferential direction of the connecting portion 11, so that a surface abutting is generated between the first force-bearing surface 211 and the connecting portion 11.

Therefore, the acting force of the first force-bearing surface 211 acting against the connecting part 11 can be prevented from being concentrated at one position of the connecting part 11, namely, the acting force of the first force-bearing surface 211 acting against the connecting part 11 can be dispersed, and correspondingly, the acting force locally applied to the connecting part 11 can be correspondingly reduced. At the same time, the moment arm of the first force-bearing surface 211 reacting to the force of the connecting part 11 is also shortened.

Similarly, along the axial direction of the connecting portion 11, a corresponding line contact or a corresponding surface contact is also generated between the second force-bearing surface 221 and the connecting portion 11, so that the acting force of the second force-bearing surface 221 acting against the connecting portion 11 can be prevented from being concentrated at one position of the connecting portion 11, that is, the acting force of the second force-bearing surface 221 acting against the connecting portion 11 can be dispersed, and accordingly, the acting force applied to a local position of the connecting portion 11 can be correspondingly reduced. At the same time, the arm of force of the second force-bearing surface 221 reacting to the force of the connecting portion 11 is also shortened.

In the process, the third force-bearing surface 241 and the seventh force-bearing surface 2311 further disperse and weaken the impact force applied to the connecting portion 11.

In some embodiments, the position of the catching groove 111 on the connecting portion 11 is disposed closer to the nozzle body 12 with respect to the water inlet 10a of the nozzle in the axial direction of the nozzle 10. That is, the distance between the center line of the locking groove 111 and one end surface of the nozzle body 12 close to the connecting portion 11 is smaller than the distance between the center line of the locking groove 111 and one end surface of the connecting portion 11 far from the nozzle body 12. Thereby, the length of the moment arm is further shortened.

Therefore, when the impact force on the two ends of the connecting part 11 is weakened and the force arm is shortened, the probability of breaking the connecting part 11 can be effectively reduced. Correspondingly, the position of the connecting part 11 provided with the clamping groove 111 can be protected, and the probability that the connecting part 11 is broken at the position of the clamping groove 111 is reduced.

In other embodiments, as shown in fig. 7, the first force-bearing surface group 20a may be disposed parallel to the axis L, i.e., both the first force-bearing surface 211 and the second force-bearing surface 221 are disposed parallel to the axis L. The connecting portion 11 includes a second force-receiving surface group 11a opposite to the first force-receiving surface group 20 a. At least a part of the second force-bearing surface group 11a is inclined gradually in a direction away from the axis L of the nozzle 10 from a position close to the nozzle body 12 to a position away from the nozzle body 12. In an embodiment, the second force-bearing surface group 11a may include a fifth force-bearing surface 1121 and a fourth force-bearing surface 1122, the fifth force-bearing surface 1121 is located on a side of the catching groove 111 close to the nozzle body 12, and the fourth force-bearing surface 1122 is located on a side of the catching groove 111 away from the nozzle body 12. The fifth force-receiving surface 1121 may be inclined with respect to the axis L, and the fifth force-receiving surface 1121 may be inclined gradually in a direction away from the axis L of the nozzle 10 from a position close to the nozzle body 12 to a position away from the nozzle body 12, that is, the fifth force-receiving surface 1121 may be substantially conical surface. The fourth force-receiving surface 1122 may be inclined with respect to the axis L, and the fourth force-receiving surface 1122 is inclined gradually toward the axis L of the nozzle 10 from a position close to the nozzle body 12 to a position away from the nozzle body 12, that is, the fourth force-receiving surface 1122 is a substantially inverted conical surface.

In other embodiments, the first force-bearing surface group 20a may be disposed parallel to the axis L, and the fifth force-bearing surface 1121 may also extend from a side of the locking slot 111 close to the nozzle body 12 to a side of the locking slot 111 away from the nozzle body 12. The fifth force-receiving surface 1121 is inclined gradually in a direction away from the axis L of the nozzle 10 from a position close to the nozzle body 12 to a position away from the nozzle body 12.

In summary, in the tooth irrigator provided by the present application, the fixing assembly 20 is connected to the connecting portion 11 of the nozzle 10, the fixing assembly 20 is formed with a first force-bearing surface group 20a disposed around the connecting portion 11, and the connecting portion 11 has an upward stroke with a second force-bearing surface group 11a opposite to the first force-bearing surface group 20a, wherein the first force-bearing surface group 20a or the second force-bearing surface group 11a is disposed obliquely with respect to the axis L of the nozzle 10. When the tooth punching device is impacted laterally, the abutting position 30 of the first force-bearing surface group 20a and the second force-bearing surface group 11a can extend at least along the axis L of the connecting part 11, namely, the first force-bearing surface group 20a and the second force-bearing surface group 11a are at least in line abutting. Therefore, the impact force applied to the connecting portion 11 can be dispersed and weakened, the arm of force of the corresponding impact force can be shortened, and the probability of breakage of the connecting portion 11 can be reduced. Further, the service life of the nozzle 10 can be extended, and the user experience can be improved.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A dental irrigator, comprising:

2. The dental irrigator of claim 1 wherein the first force-bearing surface set includes a first force-bearing surface and a second force-bearing surface along the direction of the axis of the nozzle, the first force-bearing surface being disposed closer to the nozzle body than the second force-bearing surface.

3. The dental irrigator of claim 2 wherein said first force bearing surface is disposed obliquely to an axial direction of said nozzle;

4. The dental irrigator of claim 3 wherein the angle α between the first force bearing surface and the nozzle axis is: alpha is more than or equal to 0.1 degree and less than or equal to 3 degrees.

5. The dental irrigator according to any one of claims 2 to 4 wherein said second force-bearing surface is disposed obliquely to the axial direction of said nozzle;

6. The dental irrigator of claim 5 wherein the angle β between the second force bearing surface and the nozzle axis is: beta is more than or equal to 0.1 degree and less than or equal to 3 degrees;

7. The dental irrigator of claim 2 wherein a gap is provided between the second force bearing surface and the connecting portion.

8. The dental irrigator of claim 1 wherein said fixture assembly includes a mounting base and a support cover, both said mounting base and said support cover being disposed about said connecting portion;

9. The dental irrigator of claim 8 wherein the junction of the connecting portion and the nozzle body forms a step surface, the step surface being disposed away from the nozzle body and abutting against the support deck.

10. The dental irrigator of claim 1 wherein said connecting portion includes a slot for snap-fit engagement with said fixture assembly to position said fixture assembly in the axial direction of said nozzle;

11. The dental irrigator of claim 10 wherein the centerline of said slot is spaced from an end of said nozzle body adjacent said connecting portion by a distance less than the distance between the centerline of said slot and an end of said connecting portion remote from said nozzle body in the direction of the axis of said nozzle.

12. The dental irrigator of claim 10 wherein said retaining assembly includes a snap fit member, said snap fit member snap-fit engaging said slot.

13. The dental irrigator of claim 12 wherein said catch is a floating catch in said slot in a direction perpendicular to said nozzle axis.

14. The dental irrigator of claim 1 further comprising a sealing ring sealingly coupled between said connecting portion and said retainer assembly.

15. The device as claimed in claim 14, wherein the fixing member further comprises a fixing seat, the fixing seat is sleeved on an end of the connecting portion away from the nozzle body, and the sealing ring is abutted between the connecting portion and the fixing seat.

16. The dental irrigator of claim 15 wherein said first force bearing surface set includes a third force bearing surface disposed on an inner wall of said mount opposite said connecting portion.

17. A dental irrigator, comprising: