CN210277389U

CN210277389U - Handle assembly and electric toothbrush

Info

Publication number: CN210277389U
Application number: CN201920602242.6U
Authority: CN
Inventors: 胡斐凡; 胡斐然; 胡建坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-04-10
Anticipated expiration: 2029-04-26

Abstract

For the mode of providing the tight sealing member in axial pressure top among the overcoming prior art leads to the problem of inefficacy infiltration because of fatigue etc. easily, the utility model provides a handle components and electric toothbrush. The utility model provides a handle assembly, through set up the tensioning bulge loop on the terminal surface in the shell of its casing head end, carry out interference fit with its first annular on the sealing member, so, make its top tight piece only need apply less axial packing force, just can make the cell wall of the first annular of sealing member and tensioning bulge loop produce great packing force each other in radial direction, exert for the sealing member elasticity extrusion in radial direction and realize its and shells inner wall between sealed because of the tensioning bulge loop simultaneously. Thereby, a long and tortuous sealing path is also created, ensuring that it does not seep into the handle assembly.

Description

Handle assembly and electric toothbrush

Technical Field

The utility model relates to an electric toothbrush field especially indicates sealing member stereogram on the handle components.

Background

As is well known, as shown in fig. 1, the electric toothbrush includes a handle assembly 2 and a brush head assembly 1, the handle assembly 2 includes a housing 20, a bottom cover (not labeled) and a battery, a motor, a control board, etc. disposed in a sealed space formed by the housing 20 and the bottom cover, and a driving shaft 21 is hermetically extended from a front end (or top end) of the housing 20, and the driving shaft 21 is detachably connected to the brush head assembly 1. When the electric toothbrush is used, the driving shaft 21 of the handle component 2 swings back and forth along the axis at high frequency, and drives the brush head component 1 inserted on the driving shaft to swing back and forth along with the driving shaft, so that the bristles on the brush head component 1 are driven to swing to clean teeth.

As shown in fig. 2 and 3, a sealing hole (not marked in the figures) is formed on the front end shell of the handle assembly 2; a sealing element 24 is arranged in the sealing hole 2; the driving shaft 21 of the motor is protruded from the sealing member 24, and the rear end of the sealing member 24 is pressed against the front end of the housing 20 by a pressing member 25. The tip of the jacking member 25 comes into contact with the motor.

However, in this method of sealing the sealing member 24, it is necessary to ensure a certain axial pressure to seal the sealing member 24 by applying an axial pressure from the bottom cover to the motor, the tightening member 25, and the like inside the handle assembly 2, and once the axial pressure is reduced, liquid is liable to infiltrate from the gap between the sealing member 24 and the drive shaft 21 and the housing 20, and damage is caused to the motor, the battery, and the like inside the handle assembly 2. This kind of mode of providing axial pressure tight sealing member 24 leads to the inefficacy infiltration easily because of fatigue etc. and its sealing performance is guaranteed through reasonable seal design to urgent need.

SUMMERY OF THE UTILITY MODEL

For the mode of providing the tight sealing member in axial pressure top among the overcoming prior art leads to the problem of inefficacy infiltration because of fatigue etc. easily, the utility model provides a handle components and electric toothbrush.

The utility model provides a handle component, which comprises a shell, a bottom cover, a motor, a battery and a control panel; a sealed installation space is formed between the shell and the bottom cover, and the motor, the battery and the control board are installed in the sealed installation space;

the handle assembly also comprises a sealing element and a tightening element;

the shell comprises a head end, a side shell and a tail end; the tail end is provided with the bottom cover; the head end is provided with a sealing hole, and an annular tensioning convex ring is arranged on the inner end surface of the shell inside the head end; a sealing element is arranged in the sealing hole;

the jacking piece jacks the sealing piece between the motor and the head end of the shell;

a shaft hole for sealing and extending out of a driving shaft of the power supply motor is formed at the central position of the sealing element; the outer surface of the sealing element comprises a sealing cylindrical surface, a sealing end surface and a sealing side surface; the sealing cylindrical surface is matched with the sealing hole; a first annular groove in interference fit with the tensioning convex ring is arranged on the sealing end face; the sealing end face is in contact with the inner end face of the shell inside the head end of the shell, and the tensioning convex ring is inserted into the first annular groove in the sealing end face; the tension collar compresses the seal member such that the sealing side of the seal member is in sealing contact with the inner wall of the side casing.

The utility model provides a handle assembly, through set up the tensioning bulge loop on the terminal surface in the shell of its casing head end, carry out interference fit with its first annular on the sealing member, so, make its top tight piece only need apply less axial packing force, just can make the cell wall of the first annular of sealing member and tensioning bulge loop produce great packing force each other in radial direction, exert for the sealing member elasticity extrusion in radial direction and realize its and shells inner wall between sealed because of the tensioning bulge loop simultaneously. Thereby, a long and tortuous sealing path is also created, ensuring that it does not seep into the handle assembly.

Furthermore, the number of the tensioning convex rings and the first ring grooves is 1-3.

Further, a first jacking step is formed in the tail part of the sealing element;

the jacking piece comprises a hollow body, and the front end of the hollow body is provided with a jacking end face; and the abutting end face of the abutting piece abuts against the first abutting step.

Further, a second annular groove is formed in the first jacking step; an axial convex ring is arranged on the tight-pushing end face of the tight-pushing piece;

the axial convex ring is inserted into the second annular groove in an interference fit mode.

Furthermore, the number of the second ring grooves and the number of the axial convex rings are 1-3.

Further, a second jacking step and an inner side surface are formed in the tail part of the sealing element;

a radial jacking ring is arranged on the side surface of the front end of the jacking piece in a protruding manner in the radial direction;

the radial jacking ring comprises a convex ring end surface and a convex ring side surface; the end face of the convex ring abuts against the second abutting step; the side surface of the convex ring abuts against the inner side surface of the sealing element.

Further, adhesive liquid is filled between the outer surface of the sealing element and the inner wall of the shell.

Further, the front end of the sealing element is also provided with an external convex part which extends out of the sealing hole on the head end of the shell. The utility model provides a handle assembly through stretching out at the outer convex part of its sealing member, both can prolong the length of undertaking elastic deformation's outer convex part thin wall, also can make this department can not long-pending stay liquid or dust and be difficult for forming the dirt to and be favorable to reducing the resistance to the drive shaft and the heat dissipation that the thin wall elastic deformation produced interior heat.

A second aspect of the present invention provides an electric toothbrush comprising a toothbrush assembly and the above handle assembly.

The utility model provides an electric toothbrush, through set up the tensioning bulge loop on the terminal surface in the shell of its casing head end, carry out interference fit with its first annular on the sealing member, so, make its top tight piece only need apply less axial packing force, just can make the cell wall of the first annular of sealing member and tensioning bulge loop produce great packing force each other in radial direction, exert for the sealing member elasticity extrusion in radial direction and realize its and shells inner wall between sealed because of the tensioning bulge loop simultaneously. Thereby, a long and tortuous sealing path is also created, ensuring that it does not seep into the handle assembly.

Drawings

FIG. 1 is a schematic perspective view of an electric toothbrush;

FIG. 2 is a schematic perspective view of the head end of the handle assembly of the electric toothbrush;

FIG. 3 is a schematic view of a head end seal of a handle assembly of the electric toothbrush;

FIG. 4 is a schematic perspective view of a head end of a handle assembly provided in an embodiment of the present application;

FIG. 5 is a schematic perspective exploded view of a head end of a handle assembly provided in the embodiments of the present application;

FIG. 6 is a front exploded view of a head end of a handle assembly provided in an embodiment of the present application;

FIG. 7 is a schematic sectional view taken along line A-A in FIG. 6;

FIG. 8 is an enlarged schematic view of the seal of FIG. 5;

FIG. 9a is a schematic cross-sectional view of a seal provided in a particular embodiment of the present application;

FIG. 9b is a schematic cross-sectional view of a further improved seal provided in the present application;

FIG. 9c is a schematic cross-sectional view of a further improved seal from FIG. 9b provided in a specific embodiment of the present application;

FIG. 10a is a schematic front view of a further improvement provided in the present embodiment of the present application for providing a locating mark on a seal;

FIG. 10b is a schematic top view of a further improvement provided in the present embodiment of the application for providing a locating mark on the seal;

FIG. 11 is a schematic top end partial cross-sectional view of a housing provided in an embodiment of the present application;

FIG. 12 is a schematic cross-sectional view of a tightening unit according to an embodiment of the present application;

FIG. 13 is a schematic cross-sectional view of a further improved fastener provided in embodiments of the present application;

FIG. 14 is a schematic drawing in partial cross-section of a handle assembly provided in an embodiment of the present application;

fig. 15 is an enlarged schematic view at a in fig. 14.

Wherein, 1, brush head component; 2. a handle assembly;

20. a housing; 21. a drive shaft; 22. a power switch; 23. an indicator light; 24. a seal member; 25. a top tightening member;

201. sealing the hole; 202. a shell inner end face; 203. an inner wall; 2021. tensioning the convex ring;

240. a shaft hole; 241. an outer convex portion; 242. sealing the cylindrical surface; 243. sealing the end face; 244. a first jacking step; 245. a second jacking step; 246. an inner side surface; 247. an annular cavity; 248. sealing the side face; 249. positioning a mark; 2411. thin wall; 2401. a ring body of the axle suspension ring; 2431. a first ring groove; 2441. a second ring groove; 2471. an elastic clamp spring;

250. a hollow body; 251. a radial jacking ring; 252. tightly propping the end face; 2511. the end surface of the convex ring; 2512. the side surface of the convex ring; 2521. an axial convex ring.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 1, 2 and 3, the electric toothbrush disclosed in this example also includes a handle assembly 2 and a brushhead assembly 1, which in this example is known in the art, the brushhead assembly 1 being insertable into the handle assembly 2. Specifically, the device comprises a shell 20, a bottom cover, a motor, a battery and a control board; a sealed installation space is formed between the shell 20 and the bottom cover, and the motor, the battery and the control board are installed in the sealed installation space; a driving shaft 21 is led out from a motor in the handle assembly 2; the brush head assembly 1 is inserted into the driving shaft 21 and driven by the driving shaft 21 to reciprocate. The housing 20 is generally provided with a power switch 22, an indicator light 23, etc., which are not modified in this embodiment and therefore will not be described in detail. In this embodiment, the sealing means of the sealing member 24 is mainly improved, and therefore, the sealing member 24 and the sealing connection thereof will be explained in detail below.

As shown in fig. 4-7, the handle assembly 2 further includes a sealing member 24 and a tightening member 25;

the housing 20 includes a head end, a side shell, and a tail end; the tail end is provided with the bottom cover (not marked in the figure); as shown in fig. 11, the head end is provided with a sealing hole 201, and an annular tensioning convex ring 2021 is arranged on the shell inner end surface 202 inside the head end; a sealing element 24 made of elastic material is arranged in the sealing hole 201;

the top clamping member 25 clamps the sealing member 24 between the motor and the head end of the housing 20;

as shown in fig. 8-9 b, the sealing member 24 forms a shaft hole 240 at the center for sealing the driving shaft 21 of the power supply motor; the outer surface of the seal 24 includes a sealing cylindrical surface 242, a sealing end surface 243, and a sealing side surface 248; the sealing cylindrical surface 242 is matched with the sealing hole 201; the sealing end face 243 is provided with a first ring groove 2431 which is in interference fit with the tensioning convex ring 2021; as shown in fig. 14 and 15, the sealing end face 243 contacts with the shell inner end face 202 inside the upper end of the shell 20, and the tensioning convex ring 2021 is inserted into the first annular groove 2431 on the sealing end face 243; the tensioning collar 2021 compresses the seal 24, bringing the sealing side 248 of the seal 24 into sealing contact with the inner wall 203 of the side casing.

In this example, the first ring groove 2431 has a depth of about 0.5 to 0.8 mm; the width is about 0.5-0.7 mm. The height of the tension convex ring 2021 is greater than or equal to the depth of the first ring groove 2431, and the width of the tension convex ring 2021 is slightly greater than the width of the first ring groove 2431. In this way, after the tensioning convex ring 2021 is inserted into the first annular groove 2431, the sealing element 24 can be elastically deformed in the radial direction, and the groove wall of the first annular groove 2431 and the tensioning convex ring 2021 generate a large pressing force therebetween, and simultaneously, the sealing side surface 248 of the sealing element 24 presses the inner wall 203 of the casing 20 to generate a sealing effect.

In this example, the number of the tension convex rings 2021 and the first ring grooves 2431 is 1, but the number is not limited to only 1, and may be plural, but it is not significant to provide too many tension convex rings 2021 and first ring grooves 2431, and the areas of the shell inner end surface 202 at the head end of the housing 20 and the seal end surface 243 on the seal member 24 are small, and it is impossible to provide more first ring grooves 2431 and tension convex rings 2021. It is acceptable that the number of the tension beads 2021 and the first ring grooves 2431 is 1 to 3.

In a specific implementation manner, in this example, as shown in fig. 9a, a first abutting step 244 is formed in the tail portion of the sealing member 24; as shown in fig. 12, the tightening member 25 includes a hollow body 250, and a tightening end surface 252 is provided at a front end of the hollow body 250; as shown in fig. 14 and 15, the abutting end surface 252 of the abutting member 25 abuts against the first abutting step 244. In this way, the urging member 25 can urge the seal member 24 from the rear inner end of the seal member 24.

Further, as shown in fig. 9b, a second annular groove 2441 is further formed on the first tightening step 244; as shown in fig. 13, the tightening end surface 252 of the tightening member 25 is provided with an axial convex ring 2521; the axial collar 2521 is inserted in the second annular groove 2441 by interference fit. In this way, as with the design principle of the first annular groove 2431 and the tensioning convex ring 2021, it can also press the sealing element 24 to deform it through the interference fit of the axial convex ring 2521 and the second annular groove 2441, so that the sealing element 24 can achieve its seal with the inner wall 203 of the casing 20 after being elastically pressed in the radial direction by the axial convex ring 2521 on the sealing element 24.

Similarly, the number of the second ring grooves 2441 and the axial convex rings 2521 is 1 in this example, but is not limited to 1, and may be plural, and similarly, it does not mean that too many axial convex rings 2521 and second ring grooves 2441 are provided, and the area of the abutting end surface 252 of the abutting member 25 and the first abutting step 244 on the seal member 24 is small, so that too many second ring grooves 2441 and axial convex rings 2521 cannot be provided. Generally, it is acceptable that the number of the second ring grooves 2441 and the number of the axial convex rings 2521 are 1 to 3.

As shown in fig. 9 a-9 b, a second abutting step 245 and an inner side surface 246 are further formed in the tail part of the sealing member 24; as shown in fig. 12 and 13, a radial tightening ring 251 is provided on a side surface of the front end of the tightening member 25 so as to protrude in the radial direction (indicated by Y direction in the drawing); the radial top ring 251 includes a convex ring end surface 2511 and a convex ring side surface 2512; as shown in fig. 14 and 15, the collar end surface 2511 abuts against the second abutment step 245; the collar side 2512 bears against the inner side 246 of the seal 24. In this way, the thrust piece 25 applies an axial pressing force to the sealing element 24 via the collar end surface 2511 of the radial thrust ring 251, and also applies a radial pressing force to the sealing element 24 via the collar side surface 2512 of the radial thrust ring 251 to elastically deform the sealing element 24, so that the sealing side surface 248 of the sealing surface comes into sealing contact with the side housing inner wall 203 of the housing 20, and at the same time, even if the drive shaft is subjected to a radial force, it is ensured that the drive shaft 21 and the sealing element 24 and the thrust piece 25 are not displaced in the radial direction.

In this example, in order to further ensure the sealing performance of the seal 24, it is also preferable that an adhesive liquid is filled between the outer surface of the seal 24 and the inner wall 203 of the housing 20. The bonding liquid can be hydrophobic materials such as liquid petroleum resin, liquid paraffin or waterproof lubricating grease.

In this example, as shown in fig. 8 to 9c, an outward protrusion 241 is further protruded from the front end of the seal 24, and the outward protrusion 241 is protruded from the seal hole 201 at the head end of the housing 20. The protrusion of the convex portion 241 can extend the length of the thin wall 2411 that is subjected to elastic deformation, and can prevent liquid or dust from accumulating therein and prevent dirt from being easily formed, and is advantageous for reducing the resistance to the drive shaft 21 and the heat dissipation due to internal heat generated by elastic deformation of the thin wall 2411. The longer the length of the thin wall 2411 that undergoes elastic deformation, the smaller the resistance due to the dispersed deformation amount.

As shown in fig. 9a, 9b and 9c, in this example, a hoop body 2401 is preferably provided in the seal 27, and the hoop body 2401 has an axial hole 240 therein and an annular cavity 247 formed outside thereof and surrounding the hoop body 2401. In this example, the shaft hole 240 at the center of the seal 24 may be sealed with the drive shaft 21 by elastically clasping the drive shaft 21 by the clasping ring body 2401. Preferably, an elastic clamp spring 2471 may be installed outside the embracing hoop body 2401, i.e., inside the annular cavity 247, so as to further embrace the embracing hoop body 2401 to the driving shaft 21. The annular cavity 247 separates the ring body 2401, which oscillates with the drive shaft 21, from the other fixed parts of the seal 24 pressed against the housing, which are connected to one another by a thin wall 2411 of the outer projection 241.

When the driving shaft 21 of the electric toothbrush works, the driving shaft oscillates back and forth at high frequency between +/-6 degrees and +/-8 degrees, and the embracing shaft body 2401 of the sealing element 24 wraps the driving shaft 21, so that the embracing shaft body 2401 oscillates along with the driving shaft 21. The thin wall 2411 of the male portion 241 interconnects the ring body 2401 and other fixed portions of the seal 24 that contact the housing 20 and performs the sealing and elastic deformation functions.

Preferably, as shown in fig. 10a and 10b, the seal 24 which is distributed symmetrically in the left-right direction but asymmetric in the up-down direction is further provided with a positioning mark 249, and the positioning mark 249 is used for positioning indication when the seal 24 is installed so as to facilitate installation. Specifically, the positioning mark 249 is provided directly above the end face of the distal end of the seal member 24 in this example, and corresponds to directly above the urging member 25 (see fig. 6 and 7).

In this case, by providing the tightening tab 2021 on the inner shell end surface 202 of the head end of the shell body 20, it is in interference fit with the first annular groove 2431 of the sealing member 24, so that the tightening member 25 only needs to apply a small axial (X direction marked in fig. 3 and 15) pressing force, so that the groove wall of the first annular groove 2431 of the sealing member 24 and the tightening tab 2021 can generate a large pressing force in the radial direction with respect to each other, and the sealing member 24 is elastically pressed in the radial direction by the tightening tab 2021 to seal with the inner wall 203 of the shell body 20. Thereby, a long and tortuous sealing path is also created, ensuring that no water can hereby penetrate into the handle assembly 2.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A handle assembly includes a housing, a bottom cover, a motor, a battery, and a control panel; a sealed installation space is formed between the shell and the bottom cover, and the motor, the battery and the control board are installed in the sealed installation space;

the handle assembly is characterized in that a sealing element and a jacking element are further arranged in the handle assembly;

2. The handle assembly of claim 1, wherein the number of said tension collars and said first circumferential grooves is 1-3.

3. The handle assembly of claim 1, wherein the tail portion of the seal has a first abutment step formed therein;

4. The handle assembly of claim 3, wherein the first abutment step further comprises a second annular groove; an axial convex ring is arranged on the tight-pushing end face of the tight-pushing piece;

5. The handle assembly of claim 4, wherein the number of second annular grooves and axial collars is 1-3.

6. The handle assembly of claim 3, wherein the tail portion of the seal further has a second abutment step and an inner side surface formed therein;

7. The handle assembly of claim 3, wherein a bonding liquid is further filled between an outer surface of the seal and an inner wall of the housing.

8. The handle assembly of claim 1, wherein the seal member further includes an outer protrusion extending from the forward end thereof, the outer protrusion extending from the sealing aperture in the head end of the housing.

9. An electric toothbrush comprising a toothbrush assembly and a handle assembly, wherein the handle assembly is as claimed in any one of claims 1 to 8.