An electric toothbrush and its sealing and waterproof structure

Abstract

The present invention discloses an electric toothbrush and its sealing and waterproof structure, wherein the sealing and waterproof structure comprises an electric unit, a driving shaft connected to the electric unit, a handle and a waterproof sealing component, the electric unit is installed inside the handle, the driving shaft extends out of the open end of the handle, the waterproof sealing component is sleeved on the driving shaft, and the waterproof sealing component and the inner side of the open end of the handle are installed in cooperation with each other to form a seal, the waterproof sealing component comprises a bracket waterproof soft rubber and a bracket shock-absorbing soft rubber, the bracket shock-absorbing soft rubber is sleeved on the driving shaft, and the bracket waterproof soft rubber is sleeved on the bracket shock-absorbing soft rubber, the outer side of the bracket waterproof soft rubber is fitted with the inner wall of the opening of the handle, and the inner wall of the bracket waterproof soft rubber and the outer wall of the driving shaft are provided with a mutually fitting clamping structure, the electric toothbrush comprises a brush head assembly and a sealing and waterproof structure, and the present invention solves the technical problems of difficult assembly of the electric toothbrush sealing unit and poor sealing effect in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toothbrushes, and in particular to an electric toothbrush and a sealing and waterproof structure thereof. Background Art

[0002] Electric toothbrushes are becoming more and more popular due to their high frequency, good cleaning effect and convenience. However, the waterproof sealing requirements of electric toothbrushes are relatively high, because once immersed in water, the electric toothbrush is likely to malfunction. Existing electric toothbrushes usually have simple contact seals, and some sealing unit assembly structures are very complicated and difficult to assemble.

[0003] The patent with authorization announcement number: CN 209074983U discloses a sealing waterproof part and an electric toothbrush. The patent realizes sealing by means of multiple protrusions. During assembly, it is necessary to ensure that the protrusions are inside the grooves, which increases the difficulty of assembly. Summary of the invention

[0004] The purpose of the present invention is to provide an electric toothbrush and a sealing and waterproof structure thereof, which solves the technical problems of difficult assembly and poor sealing effect of the electric toothbrush sealing unit in the prior art.

[0005] A sealing and waterproof structure of an electric toothbrush, comprising an electric unit, a drive shaft connected to the electric unit, a handle and a waterproof seal, wherein the electric unit is installed inside the handle, the drive shaft extends out of the open end of the handle, the waterproof seal is sleeved on the drive shaft, and the waterproof seal and the inner side of the open end of the handle are installed in cooperation with each other to form a seal, the waterproof seal comprises a bracket waterproof soft rubber and a bracket shock-absorbing soft rubber, the bracket shock-absorbing soft rubber is sleeved on the drive shaft, and the bracket waterproof soft rubber is sleeved on the bracket shock-absorbing soft rubber, the outer side of the bracket waterproof soft rubber is in contact with the inner wall of the opening of the handle, and the inner wall of the bracket waterproof soft rubber and the outer wall of the drive shaft are provided with a mutually cooperating snap-fit ​​structure.

[0006] The sealing and waterproof structure of the present invention is assembled with two sealing units, and then the driving shaft and the handle are sealed to improve the sealing performance; the present invention has a simple structure, is easy to install, and has a good sealing effect.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows:

[0008] Furthermore, the snap-fit ​​structure includes a convex ring arranged on the outer wall of the drive shaft and an annular groove arranged at the bottom of the waterproof soft rubber of the bracket, and the upper surface of the convex ring contacts the bottom of the annular groove. The beneficial effect of adopting this step is to improve the sealing performance through the snap-fit ​​structure.

[0009] Furthermore, the waterproof soft rubber of the bracket includes a first cylindrical portion and a second cylindrical portion with a circular extension, a first through hole for the drive shaft to pass through is arranged in the middle of the first cylindrical portion, a second through hole is arranged in the middle of the second cylindrical portion, the first cylindrical portion is located inside the second cylindrical portion, and an annular portion is connected to the upper surface of the second cylindrical portion and the upper surface of the first cylindrical portion, the bottom surface of the annular portion, the outer wall of the first cylindrical portion, and the inner wall of the second cylindrical portion are combined to form an installation gap; an annular groove is opened at the bottom of the first cylindrical portion.

[0010] Further, the shock-absorbing soft rubber of the bracket includes a third cylindrical portion and a fourth cylindrical portion with a circular extension portion, a fourth through hole for the driving shaft to pass through is provided in the middle of the fourth cylindrical portion, an inner wall of the fourth through hole contacts the outer wall of the convex ring, and an upper surface of the fourth cylindrical portion is located below the upper surface of the convex ring;

[0011] A third through hole is opened in the middle of the third cylindrical portion, and the third cylindrical portion is located above the fourth cylindrical portion. The diameter of the third through hole is larger than the diameter of the first through hole and smaller than the diameter of the second through hole.

[0012] Further, the third cylindrical portion is located inside the installation gap, the bottom surface of the first cylindrical portion contacts the upper surface of the fourth cylindrical portion, and the lower surface of the circular extension of the second cylindrical portion contacts the upper surface of the circular extension of the fourth cylindrical portion.

[0013] The present invention also discloses an electric toothbrush, comprising the above-mentioned sealing and waterproof structure, a bracket, a control unit and a brush head assembly, wherein the brush head assembly is installed on the end of the handle, the bracket is installed inside the handle, and the electric unit and the control unit are installed above the bracket, the driving shaft of the electric unit passes through the open end of the handle and extends into the brush head assembly, the control unit controls the movement of the electric unit, the waterproof seal is sleeved on the driving shaft, and the waterproof seal and the inner side of the open end of the handle are installed to cooperate with each other to form a seal.

[0014] Preferably, it also includes a first motor shock-absorbing rubber pad and a second motor shock-absorbing rubber pad, the first motor shock-absorbing rubber pad is mounted on the front end of the electric unit, and the first motor shock-absorbing rubber pad is located at the bottom of the waterproof seal, and the second motor shock-absorbing rubber pad is installed at the bottom of the electric unit and cooperates with the bracket to reduce shock.

[0015] Preferably, it also includes a motor cover, which is mounted on the outside of the first motor shock-absorbing pad, and the motor cover is provided with four assembly holes along its circumferential direction, and four protrusions are arranged at intervals on the outside of the top of the bracket, and the protrusions and the assembly holes are assembled in combination, and a buckle that cooperates with the inner wall of the handle is also provided on one side of the motor cover.

[0016] Preferably, a plurality of first slots are provided around the motor cover, a plurality of ribs are provided on the outer side of the bracket, a plurality of second slots are provided on the inner wall of the handle, and the ribs cooperate with the first slots and the second slots respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of a sealing and waterproof structure of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0019] Figure 2 It is a cross-sectional view taken along the line AA of a sealing and waterproof structure of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0020] Figure 3 It is a partial enlarged schematic diagram of a sealing and waterproof structure of an electric toothbrush according to a specific embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic structural diagram of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0022] Figure 5 A cross-sectional view of a handle of an electric toothbrush according to a specific embodiment 2 of the present invention;

[0023] Reference numerals:

[0024] 1-electric unit; 2-driving shaft; 3-handle; 4-waterproof seal; 5-clamping structure; 6-bracket; 7-control unit; 8-brush head assembly; 9-buckle; 10-first motor shock-absorbing rubber pad; 11-second motor shock-absorbing rubber pad; 12-motor cover; 13-assembly hole; 14-protrusion; 15-first slot; 16-rib; 17-second slot;

[0025] 401- waterproof soft rubber for bracket; 402- shock-absorbing soft rubber for bracket;

[0026] 403 - first cylindrical portion; 404 - second cylindrical portion; 405 - first through hole; 406 - second through hole; 407 - annular portion; 408 - installation gap;

[0027] 409 - third cylindrical portion; 410 - fourth cylindrical portion; 411 - third through hole; 412 - fourth through hole;

[0028] 501- convex ring; 502- annular groove. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0031] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1

[0034] refer to Figure 1 , Figure 1 FIG. 1 is a schematic structural diagram of a first embodiment of a sealing and waterproof structure of an electric toothbrush according to the present invention. Figure 2-3 As shown. The sealing and waterproof structure of the electric toothbrush described in the embodiment of the present invention includes an electric unit 1, a drive shaft 2 connected to the electric unit 1, a handle 3 and a waterproof seal 4. In order to realize the vibration function of the electric toothbrush, the electric unit 1 usually adopts a motor, and the drive shaft 2 is driven by the motor to vibrate to realize the vibration function of the electric toothbrush. During the assembly process, the electric unit 1 needs to be installed inside the handle 3, and the drive shaft 2 usually extends into the toothbrush head. When vibration occurs, the toothbrush head can swing to complete the brushing action; the electric unit 1 needs other electric control units to control. If the electric control unit fails, it will affect the movement of the electric unit 1. During use, the cause of the failure is often that the electric control unit is immersed in water. Therefore, the technical requirements of the waterproof seal 4 between the drive shaft 2 and the handle 3 are very high.

[0035] The electric unit 1 in this embodiment is installed inside the handle 3, the drive shaft 2 extends out of the open end of the handle 3, the waterproof seal 4 is sleeved on the drive shaft 2, and the waterproof seal 4 and the inner side of the open end 3 of the handle are installed in cooperation with each other to form a seal. The waterproof seal 4 in this embodiment is also used to improve the sealing between the drive shaft 2 and the handle 3.

[0036] refer to Figure 2 The waterproof seal 4 includes a bracket waterproof soft glue 401 and a bracket shock-absorbing soft glue 402. The bracket shock-absorbing soft glue 402 is sleeved on the driving shaft 2, and the bracket waterproof soft glue 401 is sleeved on the bracket shock-absorbing soft glue 402. The outer side of the bracket waterproof soft glue 401 is in contact with the inner wall of the opening of the handle 3, and the inner wall of the bracket waterproof soft glue 401 and the outer wall of the driving shaft 2 are provided with a mutually matching snap-fit ​​structure 5; one embodiment of the present invention is that the waterproof seal 4 is divided into two parts, namely the bracket waterproof soft glue 401 and the bracket shock-absorbing soft glue 402. These two parts not only improve the driving shaft 2 and the handle 3, but also the two parts cooperate with each other to form multiple seals such as direct contact sealing and snap-fit ​​structure 5 sealing to improve the sealing effect; another embodiment can be that the waterproof seal 4 is an integrated structure, which is directly installed on the driving shaft 2 to achieve sealing.

[0037] refer to Figure 2 The engaging structure 5 includes a convex ring 501 arranged on the outer wall of the driving shaft 2 and an annular groove 502 arranged at the bottom of the bracket waterproof soft rubber 401, and the upper surface of the convex ring 501 contacts the bottom of the annular groove 502; in this embodiment, the annular groove 502 and the convex ring 501 are surface-contacted to achieve sealing, changing the original plane contact seal to a convex surface contact seal to improve the sealing performance.

[0038] refer to Figure 3The support waterproof soft glue 401 includes a first cylindrical portion 403 and a second cylindrical portion 404 with a circular extension. The first cylindrical portion 403 is provided with a first through hole 405 for the drive shaft 2 to pass through in the middle, and the second cylindrical portion 404 is provided with a second through hole 406 in the middle. The first cylindrical portion 403 is located inside the second cylindrical portion 404, and the upper surface of the second cylindrical portion 404 and the upper surface of the first cylindrical portion 403 are connected with an annular portion 407. The bottom surface of the annular portion 407, the outer wall of the first cylindrical portion 403, and the inner wall of the second cylindrical portion 404 are combined to form an installation gap 408; the bottom of the first cylindrical portion 401 is provided with the annular groove 502; the support waterproof soft glue 401 in this embodiment is integrally formed The component is composed of multiple parts. The drive shaft 2 needs to pass through the bracket waterproof soft glue 401. Therefore, each part of the bracket waterproof soft glue 401 needs to be opened with a through hole, namely the first through hole 405 of the first cylindrical part 403 and the second through hole 406 of the second cylindrical part 404, wherein the diameter of the second through hole 406 is larger than the diameter of the first cylindrical part 403, so that it is convenient to form an annular installation gap 408 between the first cylindrical part 403, the second cylindrical part 404 and the annular part 407, which is convenient for subsequent assembly and sealing with the bracket shock-absorbing soft glue 402; and the annular groove 502 is opened at the bottom of the first cylindrical part 401, so that the inner part can cooperate with the drive shaft 2, which is conducive to achieving sealing, that is, the inner wall of the first through hole 405 is in contact with the outer wall of the drive shaft 2.

[0039] like Figure 3 As shown, the bracket shock-absorbing soft rubber 402 includes a third cylindrical portion 409 and a fourth cylindrical portion 410 with a circular extension, and a fourth through hole 412 for the drive shaft 2 to pass through is provided in the middle of the fourth cylindrical portion 410, and the inner wall of the fourth through hole 412 contacts the outer wall of the convex ring 501, and the upper surface of the fourth cylindrical portion 410 is located below the upper surface of the convex ring 501;

[0040] A third through hole 411 is formed in the middle of the third cylindrical portion 409, and the third cylindrical portion 409 is located above the fourth cylindrical portion 410. The diameter of the third through hole 411 is larger than the diameter of the first through hole 405 and smaller than the diameter of the second through hole 406.

[0041] The bracket shock-absorbing soft glue 402 in this embodiment is also integrally formed and is divided into two parts, wherein the fourth cylindrical portion 410 located at the bottom will contact part of the convex ring 501 to complete the seal, and the remaining part of the convex ring 501 will cooperate with the annular groove 502 to achieve sealing; the bracket shock-absorbing soft glue 402 in this embodiment is mainly for cooperating and assembling with the bracket waterproof soft glue 401.

[0042] Among them, reference Figure 1The third cylindrical portion 409 is located inside the installation gap 408 to complete the assembly fit, the bottom surface of the first cylindrical portion 403 contacts the upper surface of the fourth cylindrical portion 410, and the lower surface of the circular extension of the second cylindrical portion 404 contacts the upper surface of the circular extension of the fourth cylindrical portion 410; this embodiment is to achieve the combined installation of the bracket waterproof soft glue 401 and the bracket shock-absorbing soft glue 402 to improve the sealing performance.

[0043] Embodiment 2:

[0044] like Figure 4-5 The present embodiment discloses an electric toothbrush, comprising the sealing and waterproof structure described in Embodiment 1, a bracket 6, a control unit 7 and a brush head assembly 8, wherein the brush head assembly 8 is mounted on the end of the handle 3, the bracket 6 is mounted inside the handle 3, and an electric unit 1 and a control unit 9 are mounted above the bracket 6. The control unit 9 is an existing control unit 9 on the market, comprising a power supply and a circuit, and controls the electric unit 1 to move, which will not be described in detail here; similarly, the brush head assembly 8 is also an existing brush head component, which can be detachably mounted on one end of the handle, which will not be described in detail here.

[0045] The driving shaft 2 of the electric unit 1 passes through the open end of the handle 3 and extends into the interior of the brush head assembly 8. The control unit 9 controls the movement of the electric unit 1. The waterproof seal 4 is mounted on the driving shaft 2, and the waterproof seal 4 and the inner side of the open end of the handle 3 are installed in cooperation with each other to form a seal. The specific sealing structure of the waterproof seal 4 in this embodiment will not be repeated here. Please refer to Example 1 for details.

[0046] refer to Figure 4 , it also includes a first motor shock-absorbing rubber pad 10 and a second motor shock-absorbing rubber pad 11, the first motor shock-absorbing rubber pad 10 is sleeved on the front end of the electric unit 1, and the first motor shock-absorbing rubber pad 10 is located at the bottom of the waterproof seal 4, and the second motor shock-absorbing rubber pad 11 is installed at the bottom of the electric unit 1 and cooperates with the bracket 6 for shock absorption; there are two motor shock-absorbing rubber pads in this embodiment, one is installed at the front end of the electric unit 1, and the other is installed at the rear end of the electric unit 2. The first motor shock-absorbing rubber pad 10 is located at the front end and is installed in cooperation with the bottom of the bracket shock-absorbing soft glue 402, that is, an assembly groove is opened at the bottom of the bracket shock-absorbing soft glue 402, and the first motor shock-absorbing rubber pad 10 is installed inside the assembly groove to complete the assembly; the second motor shock-absorbing rubber pad 11 at the rear end cooperates with the bracket 6. When the electric unit 1 is installed on the bracket 6, the bracket 6 will set a position for placing the motor. At this time, the second motor shock-absorbing rubber pad 11 is placed between the inner wall of the position and the bottom of the electric unit 1 to complete shock absorption.

[0047] refer to Figure 4It also includes a motor cover 12, which is mounted on the outside of the first motor shock-absorbing rubber pad 10, and the motor cover 12 is provided with four assembly holes 13 along its circumferential direction, and four protrusions 14 are arranged at intervals on the outside of the top of the bracket 6, and the protrusions 14 and the assembly holes 13 are assembled in combination, and one side of the motor cover 12 is also provided with a buckle 9 that matches the inner wall of the handle 3; the installation sequence of this embodiment is that after the first motor shock-absorbing rubber pad 10 and the second motor shock-absorbing rubber pad 11 are assembled at the front and rear sections of the electric unit 1, the motor cover 12 is mounted on the first motor shock-absorbing rubber pad 10, and then it is installed in conjunction with the bracket 6, and finally the waterproof seal 4 and the handle 3 are installed.

[0048] refer to Figure 4 , 5 A plurality of slots 15 are provided around the motor cover 12, a plurality of ribs 16 are provided on the outer side of the bracket 6, and a plurality of second slots 17 are provided on the inner wall of the handle, and the ribs cooperate with the first slots 15 and the second slots 17 respectively; in this embodiment, the slots and the ribs are engaged with each other, so that the engagement assembly can be completed and the number of screws can be reduced.

[0049] In the specification of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A sealing and waterproof structure of an electric toothbrush, comprising an electric unit, a driving shaft connected to the electric unit, a handle and a waterproof seal, wherein the electric unit is installed inside the handle, the driving shaft extends out of the open end of the handle, the waterproof seal is sleeved on the driving shaft, and the waterproof seal and the inner side of the open end of the handle are installed in cooperation with each other to form a seal, characterized in that: The waterproof seal comprises a bracket waterproof soft rubber and a bracket shock-absorbing soft rubber, the bracket shock-absorbing soft rubber is sleeved on the driving shaft, and the bracket waterproof soft rubber is sleeved on the bracket shock-absorbing soft rubber, the outer side of the bracket waterproof soft rubber is in contact with the inner wall of the opening of the handle, and the inner wall of the bracket waterproof soft rubber and the outer wall of the driving shaft are provided with a mutually matching clamping structure; The engaging structure comprises a convex ring arranged on the outer wall of the driving shaft and an annular groove arranged at the bottom of the waterproof soft rubber of the bracket, and the upper surface of the convex ring contacts the bottom of the annular groove; The waterproof soft rubber of the bracket includes a first cylindrical part and a second cylindrical part with a circular extension, a first through hole for the driving shaft to pass through is arranged in the middle of the first cylindrical part, a second through hole is arranged in the middle of the second cylindrical part, the first cylindrical part is located inside the second cylindrical part, and an annular part is connected to the upper surface of the second cylindrical part and the upper surface of the first cylindrical part, and the bottom surface of the annular part, the outer wall of the first cylindrical part, and the inner wall of the second cylindrical part are combined to form an installation gap; an annular groove is opened at the bottom of the first cylindrical part; The bracket shock-absorbing soft rubber comprises a third cylindrical portion and a fourth cylindrical portion with a circular extension portion, a fourth through hole for the driving shaft to pass through is arranged in the middle of the fourth cylindrical portion, an inner wall of the fourth through hole contacts the outer wall of the convex ring, and an upper surface of the fourth cylindrical portion is located below the upper surface of the convex ring; A third through hole is opened in the middle of the third cylindrical portion, and the third cylindrical portion is located above the fourth cylindrical portion. The diameter of the third through hole is larger than the diameter of the first through hole and smaller than the diameter of the second through hole.

2. The sealing and waterproof structure of an electric toothbrush according to claim 1, characterized in that: The third cylindrical portion is located inside the installation gap, the bottom surface of the first cylindrical portion contacts the upper surface of the fourth cylindrical portion, and the lower surface of the circular extension of the second cylindrical portion contacts the upper surface of the circular extension of the fourth cylindrical portion.

3. An electric toothbrush, characterized in that: It comprises the sealing and waterproof structure, bracket, control unit and brush head assembly as described in claim 1 or 2, wherein the brush head assembly is installed on the end of the handle, the bracket is installed inside the handle, and an electric unit and a control unit are installed above the bracket, the driving shaft of the electric unit passes through the open end of the handle and extends into the brush head assembly, the control unit controls the movement of the electric unit, the waterproof seal is sleeved on the driving shaft, and the waterproof seal and the inner side of the open end of the handle are installed to cooperate with each other to form a seal.

4. An electric toothbrush according to claim 3, characterized in that: It also includes a first motor shock-absorbing rubber pad and a second motor shock-absorbing rubber pad. The first motor shock-absorbing rubber pad is mounted on the front end of the electric unit and is located at the bottom of the waterproof seal. The second motor shock-absorbing rubber pad is installed at the bottom of the electric unit and cooperates with the bracket for shock absorption.

5. An electric toothbrush according to claim 4, characterized in that: It also includes a motor cover, which is mounted on the outside of the first motor shock-absorbing pad and has four assembly holes along its circumferential direction. Four protrusions are arranged at intervals on the outside of the top of the bracket. The protrusions and the assembly holes are assembled in combination. A buckle that matches the inner wall of the handle is also provided on one side of the motor cover.

6. An electric toothbrush according to claim 5, characterized in that: A plurality of first slots are provided around the motor cover, a plurality of ribs are provided on the outer side of the bracket, and a plurality of second slots are provided on the inner wall of the handle, and the ribs cooperate with the first slots and the second slots respectively.

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