CN217138314U - Handle component of electric toothbrush and electric toothbrush with same - Google Patents

Abstract

The utility model discloses an electric toothbrush's brush holder subassembly and electric toothbrush who has it, the brush holder subassembly includes: brush holder shell, installing support and driving motor, the brush holder shell includes first casing and second casing, first casing with the second casing is followed the length direction of brush holder shell sets gradually and links to each other, the installing support is located in the brush holder shell, just motor installation position and battery installation position have on the installing support, some of installing support is located in the first casing and with first casing interference fit, some of installing support is located in the second casing and with second casing buckle fit, driving motor install in motor installation position. According to the brush holder component of the utility model, the assembly is convenient, the connection is reliable and the design is flexible.

Description

Handle component of electric toothbrush and electric toothbrush with same

Technical Field

The utility model relates to the technical field of electric toothbrushes, in particular to a brush holder component of an electric toothbrush and an electric toothbrush with the same.

Background

Electric toothbrush among the correlation technique, including shell, inside subassembly and brush head, inside subassembly includes motor, battery etc. and outside the brush head was located the shell, inside subassembly installed in the shell, the motor set up in the shell be close to the one side of brush head, the battery sets up in the shell keep away from one side of brush head, brush head and motor drive are connected. However, the housing of the electric toothbrush is constructed as a single body, and when the internal components are mounted therein, it is inconvenient to operate, the assembly efficiency is low, and the reliability and stability of the connection of the internal components to the housing are insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a brush holder component of an electric toothbrush, which is convenient for assembly, reliable in connection and flexible in design.

The utility model also provides an electric toothbrush with the brush holder component.

A handle assembly for an electric toothbrush in accordance with an embodiment of the first aspect of the present invention, comprising: the brush handle shell comprises a first shell and a second shell, and the first shell and the second shell are sequentially arranged and connected along the length direction of the brush handle shell; the mounting bracket is arranged in the brush handle shell and is provided with a motor mounting position and a battery mounting position, one part of the mounting bracket is positioned in the first shell and is in interference fit with the first shell, and one part of the mounting bracket is positioned in the second shell and is in snap fit with the second shell; and the driving motor is arranged at the motor mounting position.

According to the utility model discloses electric toothbrush's brush holder subassembly, because the brush holder shell includes first casing and the at least two parts of second casing, and the installing support assembles with these two parts respectively, for penetrating very long integral shell with a installing support, easy to operate. Moreover, through the independent cooperation of inner support and first casing and second casing difference, can play certain constraint effect to the separation of first casing and second casing, improve the reliability that first casing and second casing link to each other, can improve first casing and second casing respectively with the cooperation reliability and the stability of installing support moreover, improve installing support and brush holder shell's connection failure, the problem that the relative brush holder shell of installing support rocked in the brush holder shell. In addition, because the second casing is snap fit with the installing support, and first casing is interference fit with the installing support, for two casings all with installing support snap fit say, can reduce the assembly degree of difficulty, reduce the machining precision, improve the assembly yield, and for two casings all with installing support interference fit say, can improve the constraint effect of installing support to two casing separation, and improve the cooperation reliability of brush holder shell and installing support. In addition, the brush handle shell is arranged to comprise the first shell and the second shell which are connected with each other, so that the first shell and the second shell are not influenced by each other in structure and material, and can be designed separately and flexibly to meet different design requirements.

In some embodiments, an elastic member is interposed between the mounting bracket and the first housing, and the elastic member is elastically compressed and deformed to realize interference fit between the mounting bracket and the first housing.

In some embodiments, the elastic member includes at least one of a foam member, a silicone pad, and a rubber pad.

In some embodiments, a display module is arranged on the mounting bracket, the display module includes a plurality of display lamps, the elastic member is clamped between the display module and the first shell, an avoiding hole for avoiding each display lamp is arranged on the elastic member, and two adjacent avoiding holes are separated by an entity structure of the elastic member.

In some embodiments, the end of the first housing close to the second housing has a first mounting opening, the mounting bracket is adapted to extend into the first housing through the first mounting opening, the inner wall of the first housing has a first sliding structure, the mounting bracket has a second sliding structure, one of the first sliding structure and the second sliding structure is a first sliding groove extending along the length direction of the handle housing, and the other is a first sliding block fitted to the first sliding groove.

In some embodiments, one of the first sliding block and the first sliding groove is provided with a first protrusion, and the first sliding block and the first sliding groove are in interference fit through the first protrusion.

In some embodiments, the first sliding groove includes first side walls disposed on two sides of the first sliding block and a first bottom wall connecting the two first side walls, the first sliding block includes a first surface disposed facing the first side wall and a second surface disposed facing the first bottom wall, and the first protrusion is disposed between the first side wall and the first surface and/or between the first bottom wall and the second surface.

In some embodiments, the end of the second housing away from the first housing has a second mounting opening, the mounting bracket is adapted to extend into the second housing through the second mounting opening, the inner wall of the second housing has a third sliding structure, the mounting bracket has a fourth sliding structure, one of the third sliding structure and the fourth sliding structure is a second sliding groove extending along the length direction of the handle housing, and the other is a second sliding block fitted to the second sliding groove.

In some embodiments, a second protrusion is disposed on one of the second sliding block and the second sliding groove, and the second sliding block and the second sliding groove are in interference fit through the second protrusion.

In some embodiments, the second sliding groove includes second side walls disposed on two sides of the second sliding block and a second bottom wall connecting the two second side walls, the second sliding block includes a third surface disposed facing the second side wall and a fourth surface disposed facing the second bottom wall, and the second protrusion is disposed between the second side wall and the third surface and/or between the second bottom wall and the fourth surface.

In some embodiments, the fourth sliding structure and the second sliding structure are spaced apart along the circumference of the second housing, and/or an elastic member is interposed between the mounting bracket and the first housing, the elastic member is elastically compressed and deformed to achieve an interference fit between the mounting bracket and the first housing, and the first sliding structure and the elastic member are spaced apart along the circumference of the first housing.

In some embodiments, the mounting bracket includes a first wall surface and a second wall surface that are opposite to each other, and a third wall surface and a fourth wall surface that are connected between the first wall surface and the second wall surface and are opposite to each other, the second sliding structure is disposed on the second wall surface, the elastic member is disposed between the first wall surface and the first housing, and the fourth sliding structure is disposed on each of the third wall surface and the fourth wall surface.

In some embodiments, one end of the second housing, which is far away from the first housing, has a first locking structure, and one end of the mounting bracket, which is far away from the first housing, has a second locking structure, and one of the first locking structure and the second locking structure is a first buckle, and the other is a first clamping groove which is in snap fit with the first buckle.

In some embodiments, an end of the second housing, which is far away from the first housing, has a second mounting opening, the mounting bracket is adapted to extend into the second housing through the second mounting opening, and the first detent structure is disposed on an inner wall of the second housing.

In some embodiments, an end of the mounting bracket, which is away from the first housing, has a plurality of first connecting lugs arranged at intervals, and an outer wall of each first connecting lug is provided with the first snap.

In some embodiments, the handle housing further comprises a bottom cover disposed at the second mounting opening, the bottom cover snap-fitting with the mounting bracket.

In some embodiments, the handle housing further comprises a bottom cover disposed at the second mounting opening, a second protruding buckle is further disposed on an inner wall of each of the first connecting ears, and a second locking groove for locking with the second buckle is disposed on the bottom cover.

In some embodiments, one end of the second housing, which is far away from the first housing, is provided with a second mounting opening, one end of the first housing, which is close to the second housing, is provided with a first mounting opening, the mounting bracket is suitable for extending into the second housing through the second mounting opening and extending into the first housing through the first mounting opening, the first housing and the second housing are clamped by a first clamping assembly, and the first clamping assembly comprises a third clamping buckle arranged on one of the first housing and the second housing and a third clamping groove arranged on the other one of the first housing and the second housing.

In some embodiments, one end of the first casing close to the second casing has one of an inner ring segment and an outer ring segment, one end of the second casing close to the first casing has the other of the inner ring segment and the outer ring segment, and the outer ring segment is sleeved outside the inner ring segment.

In some embodiments, one of a third buckle and a third clamping groove is arranged on the inner wall of the outer ring section, the other of the third buckle and the third clamping groove is arranged on the inner ring section, and the third buckle and the third clamping groove are in buckle fit to form a first buckle assembly.

In some embodiments, the inner ring segment has a plurality of second engaging lugs spaced apart from each other, each of the second engaging lugs is provided with one of the third engaging groove and the third engaging groove, and the inner wall of the outer ring segment is provided with the other of the third engaging groove and the third engaging groove.

In some embodiments, a first accommodating space is formed in the first housing, a second accommodating space is formed in the second housing, at least a portion of the motor mounting location is located in the first accommodating space, a center of gravity of the driving motor is located in the first accommodating space, at least a portion of the battery mounting location is located in the second accommodating space, and the first buckle assembly is spaced apart from the mounting bracket.

In some embodiments, the second casing includes a main body section and the inner ring section, a cross-sectional area of an end portion of the main body section, which is close to the inner ring section, is larger than a cross-sectional area of the inner ring section, so that a step surface is formed between the main body section and the inner ring section, an outer surface of the first casing is flush with an outer surface of the main body section, the brush handle casing further includes a decoration ring sleeved outside the inner ring section, and the decoration ring is clamped between the first casing and the step surface, so that the outer surface of the first casing and the outer surface of the main body section are in smooth transition connection.

In some embodiments, a first limit structure is arranged on the decorative ring, a second limit structure is arranged on the inner ring section, and the first limit structure and the second limit structure are in limit fit to limit relative axial movement and/or relative circumferential movement of the decorative ring and the inner ring section.

In some embodiments, a plurality of guide ribs are arranged on the inner ring section at intervals along the circumferential direction, the decoration ring is arranged outside the inner ring section through the guide rib guide sleeve, the second limiting structure is arranged between two adjacent guide ribs, and/or one of the first limiting structure and the second limiting structure is a limiting groove, and the other one of the first limiting structure and the second limiting structure is a limiting buckle.

In some embodiments, the trim ring is a non-rotating structure and the shape of the inner ring segment matches the shape of the trim ring.

In some embodiments, at least one of the outer wall of the inner ring section and the inner wall of the outer ring section has a locking groove, and the brush holder assembly further includes a sealing ring disposed in the locking groove, wherein the sealing ring is sealed between the outer ring section and the inner ring section.

In some embodiments, the first shell is provided with a first key, the second shell is provided with a second key, and along the length direction of the brush holder shell, the distance from the first key to the second shell is smaller than the distance from the first key to one end of the first shell far away from the second shell, and the distance from the second key to the first shell is smaller than the distance from the second key to one end of the second shell far away from the first shell.

According to a second aspect of the present invention, an electric toothbrush comprises: a handle assembly for an electric toothbrush according to an embodiment of the first aspect of the present invention; and brush first subassembly, brush first subassembly is including brushing head and brush-holder stud, brush head is located the one end of brush-holder stud, the other end of brush-holder stud extends to first casing, and with driving motor links to each other.

According to the electric toothbrush of the embodiment of the utility model, the brush holder component of the electric toothbrush of the embodiment of the first aspect is arranged, so that the assembly convenience, the connection reliability and the design flexibility of the electric toothbrush are improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a perspective view of an electric toothbrush according to an embodiment of the present invention;

FIG. 2 is a perspective view of the handle assembly shown in FIG. 1;

FIG. 3 is an exploded view of the handle assembly shown in FIG. 2;

FIG. 4 is an exploded view of the handle assembly shown in FIG. 2;

FIG. 5 is a perspective view of the first housing shown in FIG. 4;

FIG. 6 is a partial view of the second housing shown in FIG. 4;

FIG. 7 is an enlarged fragmentary view of an exploded view of the handle assembly shown in FIG. 2;

FIG. 8 is an enlarged partial view of an exploded view of the handle assembly shown in FIG. 2;

FIG. 9 is an exploded view of the handle assembly shown in FIG. 2;

FIG. 10 is an enlarged fragmentary view of an exploded view of the handle assembly shown in FIG. 2;

FIG. 11 is an enlarged fragmentary view of an exploded view of the handle assembly shown in FIG. 2;

FIG. 12 is a cross-sectional view of the handle assembly shown in FIG. 2;

fig. 13 is a cross-sectional view of the handle assembly shown in fig. 2.

Reference numerals:

an electric toothbrush 1000;

a brush holder assembly 100;

a brush handle shell 1;

a first housing 11; a first mounting opening 111; a first glide structure 112; a first bottom wall 1121; a first sidewall 1122; an outer ring segment 113; a third catch 1131; the first accommodation space 114;

a second housing 12; a second mounting opening 121; a third glide structure 122; a second bottom wall 1221; a second sidewall 1222; a first detent structure 123; an inner ring segment 124; a second engaging lug 1241; a third slot 1242; a second limit structure 1243; a clamping groove 1244; a main body segment 125; a step surface 126;

the second accommodation space 127; the guide ribs 128;

a bottom cover 13; a second card slot 131;

a decorative ring 14; a first limit structure 141; a seal ring 15;

a mounting bracket 2; a motor mounting location 21; a battery mounting location 22; a second glide structure 23; a fourth glide structure 24;

the first wall surface 251; a second wall 252; a third wall 253; a fourth wall surface 254;

a first connecting lug 26; a second detent structure 261; a second catch 262; a first bracket 27; a second bracket 28;

a drive motor 3; a battery 4; an elastic member 5; a relief hole 51; a display lamp 6; a first key 7; a second key 8;

the first projection 91; a second projection 92;

a brush head assembly 200; a brush head 201; a brush bar 202.

Detailed Description

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

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Hereinafter, referring to the drawings, a handle assembly 100 of an electric toothbrush 1000 according to an embodiment of the first aspect of the present invention will be described.

As shown in fig. 1-4, the handle assembly 100 may include: brush holder shell 1, installing support 2 and driving motor 3.

As shown in fig. 1-4, the mounting bracket 2 has a motor mounting position 21 and a battery mounting position 22, the driving motor 3 is mounted at the motor mounting position 21, that is, the motor mounting position 21 is used for mounting the driving motor 3, and the battery mounting position 22 is used for mounting the battery 4, wherein the battery 4 may be a common disposable battery or a rechargeable battery, which is not limited herein. The mounting bracket 2 is arranged in the brush holder shell 1, so that the driving motor 3 and the battery 4 which are arranged on the mounting bracket 2 are all accommodated in the brush holder shell 1, and the brush holder shell 1 can protect the driving motor 3 and the battery 4.

As shown in fig. 1-4, handle housing 1 includes a first shell 11 and a second shell 12, and first shell 11 and second shell 12 are disposed and connected in series along the length of handle housing 1, and specifically, "connected" herein is understood in a broad sense and includes: the first housing 11 is directly connected to the second housing 12, and further includes: the first housing 11 and the second housing 12 are indirectly connected through other components except the mounting bracket 2. A portion of the mounting bracket 2 is located in the first housing 11 and is in interference fit with the first housing 11, and a portion of the mounting bracket 2 is located in the second housing 12 and is in snap fit with the second housing 12.

Therefore, according to the brush holder assembly 100 of the embodiment of the present invention, the brush holder housing 1 is configured to include the first shell 11 and the second shell 12 which are connected to each other, so that the first shell 11 and the second shell 12 are not affected by each other in structure and material, and can be designed separately and flexibly to meet different design requirements. Moreover, the mounting bracket 2 is respectively and independently matched with the first shell 11 and the second shell 12, so that a certain restriction effect on the separation of the first shell 11 and the second shell 12 can be achieved, and the reliability of connection of the first shell 11 and the second shell 12 is improved. And can improve first casing 11 and second casing 12 respectively with installing support 2's cooperation reliability and stability, improve installing support 2 and brush holder shell 1's connection failure, the problem that installing support 2 rocked in brush holder shell 1 relatively brush holder shell 1.

Furthermore, since the handle housing 1 includes at least two parts of the first and second shells 11 and 12, and the mounting brackets 2 are assembled with the two parts, respectively, it is easy to handle with respect to penetrating one mounting bracket 2 into a long one-piece housing. Moreover, because second casing 12 and installing support 2 are snap fit, and first casing 11 and installing support 2 are interference fit, for two casings all with installing support snap fit's scheme, can reduce the assembly degree of difficulty, reduce the machining precision, improve the assembly yield, moreover, for two casings all with installing support interference fit's scheme, can improve the constraint effect of installing support to two casing separation, and improve the cooperation reliability of brush holder shell and installing support.

In some embodiments of the present invention, as shown in fig. 3, an elastic member 5 is sandwiched between the mounting bracket 2 and the first housing 11, that is, the elastic member 5 is directly or indirectly sandwiched between the mounting bracket 2 and the first housing 11, and the elastic member 5 is elastically compressed and deformed to realize the interference fit between the mounting bracket 2 and the first housing 11. Specifically, the first housing 11 includes an inner surface and an outer surface, and the elastic member 5 is located between the inner surface of the first housing 11 and the mounting bracket 2. Alternatively, the first housing 11 may have a cylindrical shape, in which an inner cylindrical surface (or inner circumferential surface) is an inner surface and an outer cylindrical surface (or outer circumferential surface) is an outer surface.

Moreover, the thickness of the elastic member 5 is larger than the corresponding size of the accommodation space at the position where it is disposed, so as to be elastically compressively deformed. It should be noted that the elastic member 5 may directly contact with the inner surface of the first casing 11, or a spacer may be disposed between the elastic member 5 and the inner surface of the first casing 11 to achieve indirect contact with the first casing 11, and similarly, the elastic member 5 may directly contact with the mounting bracket 2, or a spacer may be disposed between the elastic member 5 and the mounting bracket 2, for example, a display module and the like described later, to achieve indirect contact with the mounting bracket 2.

From this, can realize the assembly of installing support 2 and first casing 11 simply and easily to guarantee that installing support 2 and first casing 11 are interference fit, and, can utilize elastic component 5 to play damping effect comparatively effectively, reduce the vibration of installing support 2 to first casing 11 transmission, improve the holding of brush holder subassembly 100 and feel. Specifically, the specific material selection of the elastic member 5 is not limited, and for example, the elastic member may be a foam, a silica gel pad, a rubber pad, or the like, so that the elastic member 5 can be flexibly selected, the cost is low, the adaptability is good, the interference fit reliability is good, and the vibration reduction effect is good.

Optionally, as shown in fig. 3, a display module is disposed on the mounting bracket 2, the display module includes a plurality of display lamps 6, the elastic member 5 is sandwiched between the display module and the first housing 11, an avoiding hole 51 is disposed on the elastic member 5 to avoid each display lamp 6, and two adjacent avoiding holes 51 are separated by a solid structure of the elastic member 5. From this, elastic component 5's area of coverage is great, can promote interference fit's reliability, and elastic component 5 can also play the effect of light-proof moreover, avoids astigmatic or the mutual interference between a plurality of display lamps 6. Specifically, the coverage area of the elastic member 5 is not limited, and may cover only a few small parts, or may cover a large area, for example, when the covered area includes a display module, the above-mentioned avoiding hole 51 may be provided.

In some embodiments of the present invention, as shown in fig. 3 and 5, one end of the first casing 11 close to the second casing 12 has a first mounting opening 111, the mounting bracket 2 is adapted to extend into the first casing 11 through the first mounting opening 111, the inner wall of the first casing 11 has a first sliding structure 112, the mounting bracket 2 has a second sliding structure 23, one of the first sliding structure 112 and the second sliding structure 23 is a first sliding groove extending along the length direction of the handle housing 1, and the other is a first sliding block fitted to the first sliding groove. Therefore, the first shell 11 and the mounting bracket 2 can be assembled conveniently, the first shell 11 can be in a cylindrical shape, the sealing performance is good, the assembling step of the first shell 11 is omitted, and the production efficiency is improved. In addition, through the cooperation of first spout and first slider, guarantee both relative circumferential position after the assembly that slide and satisfy the requirement, saved and carried out the operation of relative circumferential position alignment many times in the assembling process, reduced the assembly degree of difficulty, improved assembly efficiency.

Optionally, referring to fig. 12, a first protrusion 91 is disposed on one of the first sliding block and the first sliding chute, and the first sliding block and the first sliding chute are in interference fit via the first protrusion 91. Therefore, the interference fit between the first shell 11 and the mounting bracket can be skillfully realized, and the problem that the interference fit occupies other functional spaces is solved.

Of course, the present invention is not limited to this, and for example, the elastic member 5 and the first protrusion 91 may be adopted to realize the interference fit at the same time, so as to further improve the reliability of the interference fit. For example, in this embodiment, the first sliding structure 112 and the elastic member 5 may be spaced along the circumference of the first housing 11, thereby improving the reliability of the interference fit and having a better circumferential alignment effect.

Alternatively, as shown in fig. 3 and 5, the first sliding groove may include first side walls 1122 disposed on both sides of the first slider and a first bottom wall 1121 connecting the two first side walls 1122, the first slider includes a first surface disposed facing the first side wall 1122 and a second surface disposed facing the first bottom wall 1121, and in conjunction with fig. 12, a first protrusion 91 is disposed between the first side wall 1122 and the first surface and/or between the first bottom wall 1121 and the second surface. That is, interference fit can be achieved from the width direction and/or the depth direction of the first chute, so that flexible design can be achieved.

In some embodiments of the present invention, as shown in fig. 3 and 6, the end of the second casing 12 far from the first casing 11 has a second mounting opening 121, the mounting bracket 2 is adapted to extend into the second casing 12 through the second mounting opening 121, the inner wall of the second casing 12 has a third sliding structure 122, the mounting bracket 2 has a fourth sliding structure 24, one of the third sliding structure 122 and the fourth sliding structure 24 is a second sliding groove extending along the length direction of the handle housing 1, and the other is a second sliding block fitted to the second sliding groove. Therefore, the second shell 12 and the mounting bracket 2 can be assembled conveniently, the second shell 12 can be in a cylindrical shape, the sealing performance is good, the assembling step of the second shell 12 is omitted, and the production efficiency is improved. In addition, through the cooperation of second spout and second slider, guarantee both relative circumferential position after the assembly that slide and satisfy the requirement, saved and carried out the operation of relative circumferential position alignment many times in the assembling process, reduced the assembly degree of difficulty, improved assembly efficiency.

It is worth to say that, first spout and second spout can all be one or more, and when being a plurality of, can improve the stability of sliding fit, when being one, can save space. For example, at least one of the first sliding groove and the second sliding groove can be two and oppositely arranged, so that the stability can be improved, and the space can be saved.

Optionally, with reference to fig. 13, a second protrusion 92 is disposed on one of the second sliding block and the second sliding chute, and the second sliding block and the second sliding chute are in interference fit through the second protrusion 92. From this, second casing 12 also can be interference fit with installing support 2 to can improve the reliability that installing support 2 retrains first casing 11 and the separation of second casing 12, and can realize the interference fit of second casing 12 with the dress support comparatively ingeniously, improve the problem that interference fit occupies other functional space.

In some embodiments of the present invention, an elastic member is clamped between the mounting bracket 2 and the second housing 12, that is, the elastic member is directly or indirectly clamped between the mounting bracket 2 and the second housing 12, and the elastic member is elastically compressed and deformed to realize the interference fit between the mounting bracket 2 and the second housing 12. Specifically, the second housing 12 includes an inner surface and an outer surface, and the elastic member is located between the inner surface of the second housing 12 and the mounting bracket 2. Alternatively, the second housing 12 may be cylindrical, and an inner cylindrical surface (or inner circumferential surface) thereof is an inner surface, and an outer cylindrical surface (or outer circumferential surface) thereof is an outer surface.

Moreover, the thickness of the elastic member is larger than the corresponding dimension of the accommodation space at the position where it is disposed, so as to be elastically compressively deformed. In addition, it should be noted that the elastic member may directly contact the inner surface of the second casing 12, or a spacer may be disposed between the elastic member and the inner surface of the second casing 12 to achieve indirect contact with the second casing 12, and similarly, the elastic member may directly contact the mounting bracket 2, or a spacer may be disposed between the elastic member and the mounting bracket 2 to achieve indirect contact with the mounting bracket 2.

Of course, the present invention is not limited to this, and for example, the elastic member and the second protrusion 92 may be used to realize the interference fit between the mounting bracket 2 and the second housing 12, so as to further improve the reliability of the interference fit.

Alternatively, as shown in fig. 3 and 6, the second sliding chute includes a second side wall 1222 disposed at both sides of the second slider and a second bottom wall 1221 connecting the two second side walls 1222, the second slider includes a third surface disposed facing the second side wall 1222 and a fourth surface disposed facing the second bottom wall 1221, and in conjunction with fig. 13, a second protrusion 92 is disposed between the second side wall 1222 and the third surface and/or between the second bottom wall 1221 and the fourth surface. That is, interference fit can be achieved from the width direction and/or the depth direction of the second chute, so that flexible design can be achieved.

The utility model discloses an in some embodiments, fourth sliding structure 24 and second sliding structure 23 are spaced apart along the week of second casing 12, from this, and for the fourth sliding structure 24 and the mutual noninterference influence of second sliding structure 23 that set up on installing support 2, can have longer axial and set up length to promote sliding fit's stability and reliability.

In some embodiments of the present invention, as shown in fig. 3 and 4, the mounting bracket 2 may include a first wall 251 and a second wall 252 opposite to each other, and a third wall 253 and a fourth wall 254 connected between the first wall 251 and the second wall 252 and opposite to each other, the second sliding structure 23 is disposed on the second wall 252, the elastic member 5 is disposed between the first wall 251 and the first housing 11, and the third wall 253 and the fourth wall 254 are respectively provided with a fourth sliding structure 24. From this, can guarantee to improve the stability and the reliability of the cooperation of sliding, can guarantee again to have better interference fit effect to when processing and assembly, the subassembly that slides can not the mutual interference influence with elastic component 5, be convenient for processing and assembly.

In some embodiments of the present invention, in order to facilitate processing, design, installation, etc., the mounting bracket 2 may be configured to be composed of a plurality of parts, for example, as shown in fig. 3 and 4, the mounting bracket 2 may include a first bracket 27 and a second bracket 28, the first bracket 27 has a mounting space and a battery mounting position 22 thereon, and the second bracket 28 and the first bracket 27 define the motor mounting position 21 together, so as to facilitate assembly, design and processing, and improve the mounting reliability.

In some embodiments of the present invention, as shown in fig. 3 and 4, 6 and 7, one end of the second housing 12 away from the first housing 11 has a first locking structure 123, one end of the mounting bracket 2 away from the first housing 11 has a second locking structure 261, one of the first locking structure 123 and the second locking structure 261 is a first buckle, and the other is a first slot in which the first buckle is in a snap-fit engagement. From this, the cooperation of first buckle and first draw-in groove does not influence being connected of first casing 11 and second casing 12 to can simplify assembly and design, guarantee structure succinct nature. In addition, because the vibration transmission that snap-fit causes also is comparatively close to the tip between installing support 2 and the second casing 12, the longer distance of transmission need be passed on installing support 2 to the vibration that driving motor 3 transmitted for installing support 2 to extension vibration transmission path consumes the vibration, improves and holds and feels.

Alternatively, when the second housing 12 has a second mounting opening 121 at an end thereof away from the first housing 11, and the mounting bracket 2 is adapted to extend into the second housing 12 through the second mounting opening 121, the first detent structure 123 may be disposed on an inner wall of the second housing 12. From this, when stretching into second casing 12 with installing support 2 and when the final position, second screens structure 261 on installing support 2 can stretch into second casing 12 in order to cooperate with first screens structure 123 to explain that second screens structure 261 can not stretch into earlier and take place the friction with second casing 12 in second casing 12 and collide with the scheduling problem, improve the smoothness of assembly, protect second casing 12 inner structure and second screens structure 261. Moreover, since the second locking structure 261 and the first locking structure 123 can be located in the second housing 12, the problems of exposure and damage can be avoided.

Alternatively, as shown in fig. 6 and 7, an end of the mounting bracket 2 away from the first housing 11 has a plurality of first connecting lugs 26 arranged at intervals, and an outer wall of each first connecting lug 26 is provided with a first snap. That is, the second locking structure 261 is a first buckle and is disposed on the first connecting lug 26, and meanwhile, the first locking structure 123 is a first slot formed on the inner wall of the second housing 12. Therefore, in the process of installing the mounting bracket 2 into the second housing 12, the two first connecting lugs 26 can approach each other, so that the first buckle extends into the second housing 12, and then the first buckle is located in the first clamping groove by utilizing the elastic restoring force of the first connecting lugs 26. From this, processing and convenient assembling, and first buckle is not fragile, and the screens reliability is higher.

In some embodiments of the present invention, as shown in fig. 3, 4 and 7, the brush holder housing 1 may further include a bottom cover 13, the bottom cover 13 is disposed at the second mounting opening 121, and the bottom cover 13 is snap-fitted with the mounting bracket 2. Therefore, the end part of the second shell 12 can be sealed by the bottom cover 13 to protect the internal structure, and the mounting bracket 2 is in snap fit with the bottom cover 13, so that the structure can be simplified, the structure matched with the bottom cover 13 and processed on the second shell 12 can be avoided, and the design and processing of the second shell 12 can be simplified. In addition, because the mounting bracket 2 is also in snap fit with the bottom cover 13, a part of vibration transmitted to the mounting bracket 2 by the driving motor 3 can also be transmitted to the bottom cover 13, so that the vibration is further consumed, and the holding hand feeling is improved.

Optionally, as shown in fig. 3 and 4, fig. 7 and fig. 8, a protruding second catch 262 is further provided on an inner wall of each first connecting ear 26, and the bottom cover 13 has a second catch 131 that is snap-fitted with the second catch 262. From this, can simplify the processing of bottom 13, utilize the yielding nature of first engaging lug 26 moreover, can be favorable to realizing the reliable cooperation of first buckle and first draw-in groove, can also be favorable to realizing the reliable cooperation of second buckle 262 and second draw-in groove 131, the design is very ingenious, simple.

In some embodiments of the present invention, as shown in fig. 3, 4 and 9, an end of the second housing 12 far from the first housing 11 has a second mounting opening 121, an end of the first housing 11 near the second housing 12 has a first mounting opening 111, the mounting bracket 2 is adapted to extend into the second housing 12 through the second mounting opening 121 and extend into the first housing 11 through the first mounting opening 111, and the first housing 11 and the second housing 12 are clamped by a first clamping assembly, which includes a third clamping buckle 1131 disposed on one of the first housing 11 and the second housing 12 and a third clamping groove 1242 disposed on the other of the first housing 11 and the second housing 12. Therefore, the assembly method is easy to operate, the assembly process is smooth and simple, the assembly efficiency is high, the processing is convenient, and the structure is simplified.

In some embodiments of the present invention, as shown in fig. 3, 4 and 9, one end of the first casing 11 close to the second casing 12 has one of the inner ring segment 124 and the outer ring segment 113, one end of the second casing 12 close to the first casing 11 has the other of the inner ring segment 124 and the outer ring segment 113, and the outer ring segment 113 is sleeved outside the inner ring segment 124. Therefore, the first shell 11 and the second shell 12 can be inserted or sleeved at the positions close to each other, so that the problems of matching gaps and the like at the connecting position can be solved, and the sealing performance is improved.

Optionally, as shown in fig. 9-11, one of the third buckle 1131 and the third buckle groove 1242 is disposed on the inner wall of the outer ring section 113, the other of the third buckle 1131 and the third buckle groove 1242 is disposed on the inner ring section 124, and the third buckle 1131 is in snap fit with the third buckle groove 1242 to form the first buckle assembly. Therefore, the first housing 11 and the second housing 12 are connected through the first buckle assembly, so that the assembly efficiency of the first housing 11 and the second housing 12 can be improved, and the connection mode is simplified.

Further, as shown in fig. 9-11, the inner ring segment 124 may have a plurality of second engaging lugs 1241 spaced apart from each other, each second engaging lug 1241 is provided with one of a third engaging slot 1242 and a third engaging catch 1131, and the inner wall of the outer ring segment 113 is provided with the other of the third engaging catch 1131 and the third engaging slot 1242. Therefore, the elastic deformation of the second engaging lug 1241 can be utilized to facilitate the smooth and reliable engagement between the third latch 1131 and the third slot 1242.

In some embodiments of the present invention, as shown in fig. 3-6, 12 and 13, a first accommodating space 114 is formed in the first housing 11, a second accommodating space 127 is formed in the second housing 12, at least a portion of the motor mounting position 21 is located in the first accommodating space 114, the center of gravity of the driving motor 3 is located in the first accommodating space 114, at least a portion of the battery mounting position 22 is located in the second accommodating space 127, and the first buckle assembly is spaced apart from the mounting bracket 2. Therefore, the distance between the driving motor 3 and the second shell 12 can be increased, when the electric toothbrush is used, a user usually holds the second shell 12, the vibration of the driving motor 3 is transmitted to the mounting bracket 2 firstly, then transmitted to the positions of the mounting bracket 2 and the second shell 12 in a snap fit manner along the mounting bracket 2 and then transmitted to the second shell 12, and the center of the driving motor 3 is located in the first accommodating space 114, so that the vibration of the driving motor 3 needs to be transmitted for a long distance on the mounting bracket 2, the vibration can be weakened well, and the hand feeling of holding is improved.

In addition, since the mounting bracket 2 is spaced apart from the first snap assembly between the first housing 11 and the second housing 12, the problem that the snap connection between the first housing 11 and the second housing 12 fails due to the mounting bracket 2 striking the first snap assembly due to vibration can be avoided, thereby improving the connection reliability of the first housing 11 and the second housing 12. Optionally, the spacing distance between the mounting bracket 2 and the first clip assembly is less than or equal to 3mm, so that the mounting bracket 2 can limit the first clip assembly to a certain extent, the problem that the third clip 1131 and the third clip 1242 are separated due to deformation is limited, and the reliability of connection between the first housing 11 and the second housing 12 is improved.

In some embodiments of the present invention, as shown in fig. 2 and fig. 9 to fig. 11, the second shell 12 includes a main body section 125 and an inner ring section 124, a cross-sectional area of an end portion of the main body section 125 close to the inner ring section 124 is larger than a cross-sectional area of the inner ring section 124, so that a step surface 126 is formed between the main body section 125 and the inner ring section 124, an outer surface of the first shell 11 is flush with an outer surface of the main body section 125, the handle housing 1 further includes a decoration ring 14 sleeved outside the inner ring section 124, and the decoration ring 14 is sandwiched between the first shell 11 and the step surface 126, so that the outer surface of the first shell 11 is smoothly transitionally engaged with the outer surface of the main body section 125. From this for the surface of brush holder shell 1 is smooth, is favorable to improving and holds the travelling comfort, and avoids forming the step at the outward appearance of brush holder shell 1 and causes deposition, ponding, deposit bacterium scheduling problem.

Optionally, as shown in fig. 10 to 13, a first limit structure 141 is provided on the decorative ring 14, a second limit structure 1243 is provided on the inner ring segment 124, and the first limit structure 141 and the second limit structure 1243 are in limit fit to limit relative axial movement and/or relative circumferential movement of the decorative ring 14 and the inner ring segment 124. This can improve the mounting stability of the trim ring 14 and reduce the wear and other problems easily and effectively.

For example, as shown in fig. 11-13, the inner ring segment 124 is provided with a plurality of guide ribs 128 arranged at intervals along the circumferential direction, the trim ring 14 is guided by the guide ribs 128 to be sleeved outside the inner ring segment 124, and the second limit structure 1243 is located between two adjacent guide ribs 128. Therefore, during assembly, after being guided by the guide rib 128, the second limit structure 1243 is in limit fit with the first limit structure 141, so that the convenience of assembly is improved.

For example, one of the first limit structure 141 and the second limit structure 1243 is a limit groove, and the other is a limit buckle. Therefore, the processing is convenient, the limiting matching is easy, and the limiting effect is reliable.

Alternatively, as shown in fig. 11, the trim ring 14 is a non-rotating structure and the shape of the inner ring segment 124 matches the shape of the trim ring 14. Therefore, the circumferential movement of the decoration ring 14 can be simply and effectively limited, the structure and the design are simplified, the processing and the assembly are convenient, and the problems of abrasion and the like can be effectively and reliably reduced.

In some embodiments of the present invention, as shown in fig. 11, at least one of the outer wall of the inner ring section 124 and the inner wall of the outer ring section 113 has a locking groove 1244, the brush holder assembly 100 further includes a sealing ring 15 disposed in the locking groove 1244, and the sealing ring 15 is sealed between the outer ring section 113 and the inner ring section 124. Therefore, the connection sealing performance of the first shell 11 and the second shell 12 can be improved, and the problems of dust, water and the like entering from the connection position can be reduced.

In some embodiments of the present invention, as shown in fig. 1-2, the first housing 11 is provided with a first key 7, the second housing 12 is provided with a second key 8, and along the length direction of the handle housing 1, the distance from the first key 7 to the second housing 12 is less than the distance from the first key 7 to the end of the first housing 11 away from the second housing 12, and the distance from the second key 8 to the first housing 11 is less than the distance from the second key 8 to the end of the second housing 12 away from the first housing 11. That is to say, the first key 7 and the second key 8 are both arranged close to the joint of the first casing 11 and the second casing 12, so that the user can conveniently switch and touch the first key 7 and the second key 8, and the operation is convenient.

Next, an electric toothbrush 1000 according to an embodiment of the second aspect of the present invention will be described with reference to the drawings.

As shown in fig. 1, the electric toothbrush 1000 may include: brush holder assembly 100 and brush head assembly 200, brush head assembly 200 includes brush head 201 and brush pole 202, and brush head 201 locates the one end of brush pole 202, and the other end of brush pole 202 extends to first casing 11, and links to each other with driving motor 3 to driving motor 3 can drive brush head assembly 200 and carry out work. Wherein the handle assembly 100 is the handle assembly 100 of the electric toothbrush 1000 according to the first aspect of the present invention. Thus, the flexibility of design can be improved.

Wherein, the brush head 201 can be provided with bristles, which are hidden and not shown. In addition, other constructions and operations of the electric toothbrush 1000 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "length", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of 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 thus, should not be construed as limiting the present invention.

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 to implicitly indicate 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 invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature 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.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (29)

1. A handle assembly for an electric toothbrush, comprising:

the brush handle shell comprises a first shell and a second shell, and the first shell and the second shell are sequentially arranged and connected along the length direction of the brush handle shell;

the mounting bracket is arranged in the brush handle shell and is provided with a motor mounting position and a battery mounting position, one part of the mounting bracket is positioned in the first shell and is in interference fit with the first shell, and one part of the mounting bracket is positioned in the second shell and is in snap fit with the second shell;

and the driving motor is arranged at the motor mounting position.

2. The handle assembly of an electric toothbrush as claimed in claim 1, wherein a resilient member is interposed between the mounting bracket and the first housing, the resilient member being elastically deformed in compression to achieve an interference fit of the mounting bracket with the first housing.

3. The handle assembly of an electric toothbrush of claim 2, wherein the resilient member comprises at least one of a foam, a silicone pad, and a rubber pad.

4. The handle assembly of claim 2, wherein a display module is disposed on the mounting bracket, the display module includes a plurality of display lamps, the elastic member is sandwiched between the display module and the first housing, an avoiding hole is disposed on the elastic member to avoid each display lamp, and two adjacent avoiding holes are separated by a solid structure of the elastic member.

5. The powered toothbrush handle assembly of claim 1, wherein the first housing has a first mounting opening at an end thereof adjacent the second housing, the mounting bracket is adapted to extend into the first housing through the first mounting opening, the first housing has a first sliding feature on an inner wall thereof, the mounting bracket has a second sliding feature thereon, one of the first sliding feature and the second sliding feature is a first sliding slot extending along a length of the handle housing, and the other is a first sliding block engaged with the first sliding slot.

6. The handle assembly of an electric toothbrush of claim 5, wherein one of the first slider and the first runner has a first protrusion thereon, the first slider and the first runner being in interference fit via the first protrusion.

7. The handle assembly of an electric toothbrush according to claim 6, wherein the first sliding groove comprises a first side wall disposed at both sides of the first slider and a first bottom wall connecting the two first side walls, the first slider comprises a first surface disposed facing the first side wall and a second surface disposed facing the first bottom wall, and the first protrusion is disposed between the first side wall and the first surface and/or between the first bottom wall and the second surface.

8. The powered toothbrush handle assembly of claim 5, wherein the second housing has a second mounting opening at an end thereof remote from the first housing, the mounting bracket is adapted to extend into the second housing through the second mounting opening, the second housing has a third sliding structure on an inner wall thereof, the mounting bracket has a fourth sliding structure thereon, one of the third sliding structure and the fourth sliding structure is a second sliding groove extending along a length of the handle housing, and the other is a second slider engaged with the second sliding groove.

9. The handle assembly of an electric toothbrush of claim 8, wherein one of the second slider and the second runner has a second protrusion thereon, the second slider and the second runner being in interference fit via the second protrusion.

10. The handle assembly of an electric toothbrush according to claim 9, wherein the second sliding groove comprises a second side wall disposed at both sides of the second slider and a second bottom wall connecting the two second side walls, the second slider comprises a third surface disposed facing the second side wall and a fourth surface disposed facing the second bottom wall, and the second protrusion is disposed between the second side wall and the third surface and/or between the second bottom wall and the fourth surface.

11. The handle assembly of an electric toothbrush according to claim 8, wherein the fourth sliding structure and the second sliding structure are spaced along the circumference of the second housing, and/or an elastic member is interposed between the mounting bracket and the first housing, the elastic member is elastically compressed and deformed to realize interference fit of the mounting bracket and the first housing, and the first sliding structure and the elastic member are spaced along the circumference of the first housing.

12. The handle assembly of claim 11, wherein the mounting bracket comprises a first wall and a second wall disposed opposite to each other, and a third wall and a fourth wall connected between the first wall and the second wall and disposed opposite to each other, the second sliding structure is disposed on the second wall, the resilient member is disposed between the first wall and the first housing, and the fourth sliding structure is disposed on each of the third wall and the fourth wall.

13. The handle assembly of claim 1, wherein the second housing has a first detent structure at an end thereof remote from the first housing, and the mounting bracket has a second detent structure at an end thereof remote from the first housing, one of the first detent structure and the second detent structure being a first snap fit and the other being a first snap fit with the first snap fit.

14. The handle assembly of an electric toothbrush of claim 13, wherein an end of the second housing remote from the first housing has a second mounting opening, the mounting bracket is adapted to extend into the second housing through the second mounting opening, and the first detent structure is provided on an inner wall of the second housing.

15. The handle assembly of an electric toothbrush as claimed in claim 14, wherein the mounting bracket has a plurality of first coupling lugs spaced apart from each other at an end thereof remote from the first housing, and the first snap is provided on an outer wall of each of the first coupling lugs.

16. The powered toothbrush handle assembly of claim 14, wherein the handle housing further includes a bottom cover disposed at the second mounting opening, the bottom cover snap-fitting to the mounting bracket.

17. The powered toothbrush handle assembly of claim 15, wherein the handle housing further comprises a bottom cover disposed at the second mounting opening, wherein a protruding second snap is further disposed on an inner wall of each of the first connecting ears, and wherein the bottom cover has a second snap groove for snap-fitting with the second snap groove.

18. The electric toothbrush handle assembly of claim 1, wherein the second housing has a second mounting opening at an end thereof remote from the first housing, the first housing has a first mounting opening at an end thereof proximate to the second housing, the mounting bracket is adapted to extend into the second housing through the second mounting opening and into the first housing through the first mounting opening, and the first housing and the second housing are snap-fitted by a first snap-fit assembly, the first snap-fit assembly including a third snap-fit provided on one of the first housing and the second housing and a third snap-fit provided on the other of the first housing and the second housing.

19. The handle assembly of an electric toothbrush of claim 1, wherein the first housing has one of an inner ring segment and an outer ring segment at an end thereof adjacent to the second housing, the second housing has the other of the inner ring segment and the outer ring segment at an end thereof adjacent to the first housing, and the outer ring segment is disposed outside the inner ring segment.

20. The handle assembly of claim 19, wherein one of a third snap and a third snap groove is provided on an inner wall of the outer ring section, and the other of the third snap and the third snap groove is provided on the inner ring section, the third snap and the third snap groove snap-fit together to form a first snap assembly.

21. The handle assembly of claim 20, wherein the inner ring segment has a plurality of second engaging lugs spaced apart from each other, each of the second engaging lugs has one of the third engaging grooves and the third engaging grooves, and the inner wall of the outer ring segment has the other of the third engaging grooves and the third engaging grooves.

22. The handle assembly of an electric toothbrush of claim 18 or 20, wherein a first receiving space is formed in the first housing, a second receiving space is formed in the second housing, at least a portion of the motor mounting location is located in the first receiving space, a center of gravity of the drive motor is located in the first receiving space, at least a portion of the battery mounting location is located in the second receiving space, and the first snap assembly is spaced apart from the mounting bracket.

23. The electric toothbrush handle assembly of claim 19, wherein the second housing includes a main body section and the inner ring section, a cross-sectional area of an end portion of the main body section near the inner ring section is larger than a cross-sectional area of the inner ring section, so that a step surface is formed between the main body section and the inner ring section, an outer surface of the first housing is flush with an outer surface of the main body section, the handle housing further includes a decoration ring sleeved outside the inner ring section, and the decoration ring is sandwiched between the first housing and the step surface, so that the outer surface of the first housing is smoothly transitionally engaged with the outer surface of the main body section.

24. The handle assembly of claim 23, wherein the decorative ring has a first stop structure thereon, and the inner ring segment has a second stop structure thereon, the first stop structure and the second stop structure being in stop-and-go engagement to limit relative axial and/or circumferential movement of the decorative ring and the inner ring segment.

25. The handle assembly of claim 24, wherein the inner ring segment has a plurality of guide ribs spaced apart from each other along a circumferential direction, the decoration ring is guided by the guide ribs and sleeved outside the inner ring segment, the second position-limiting structure is located between two adjacent guide ribs, and/or one of the first position-limiting structure and the second position-limiting structure is a position-limiting groove, and the other one of the first position-limiting structure and the second position-limiting structure is a position-limiting buckle.

26. The electric toothbrush handle assembly of claim 23, wherein the decorative ring is a non-rotating structure and the shape of the inner ring segment matches the shape of the decorative ring.

27. The electric toothbrush handle assembly of claim 19, wherein at least one of the outer wall of the inner ring segment and the inner wall of the outer ring segment has a retaining groove, the handle assembly further comprising a sealing ring disposed in the retaining groove, the sealing ring sealing between the outer ring segment and the inner ring segment.

28. The handle assembly of claim 1, wherein the first housing has a first button and the second housing has a second button, the first button being spaced from the second housing a distance less than the first button to an end of the first housing distal from the second housing, the second button being spaced from the first housing a distance less than the second button to an end of the second housing distal from the first housing, along the length of the handle housing.

29. An electric toothbrush, comprising:

a handle assembly of an electric toothbrush according to any one of claims 1-28; and

the brush head assembly comprises a brush head and a brush rod, the brush head is arranged at one end of the brush rod, and the other end of the brush rod extends to the first shell and is connected with the driving motor.

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