CN219332045U - Electric toothbrush - Google Patents

Abstract

The embodiment of the application discloses an electric toothbrush, which comprises a shell, a first bracket, a battery, a second bracket, a motor, an elastic piece and a sealing piece, wherein the shell is provided with a mounting cavity and a through hole communicated with the mounting cavity; the first bracket is arranged in the mounting cavity; the battery is arranged on the first bracket; the second bracket is arranged in the mounting cavity, the second bracket is provided with a first end part which is arranged adjacent to the via hole, and the second bracket and the first bracket can relatively move; the motor is arranged on the second bracket, and an output shaft of the motor penetrates through the through hole; the two ends of the elastic piece respectively press against the first bracket and the second bracket; the sealing element is tightly sleeved on the output shaft, and the sealing element is pressed between the first end part and the inner wall of the shell by the elastic force of the elastic element. The elastic piece applies an acting force along the axial direction of the shell to the second bracket, so that the sealing piece is clamped between the first end part of the second bracket and the inner wall of the shell, and the sealing effect of the sealing piece can be improved.

Description

Electric toothbrush

Technical Field

The utility model relates to the technical field of daily electrical appliances, in particular to an electric toothbrush.

Background

In the related art, the electric toothbrush includes motor and casing, is equipped with the installation cavity in the casing, and the motor is installed in the installation cavity, is equipped with sealing member between the tip of motor and the casing, and on the output shaft was located to the sealing member cover, and the output shaft stretches out in the tip of casing, realizes the seal of casing tip through sealing member, but because reasons such as machining error, the sealing member probably can exist the condition of not tight of pressure, influences the sealed effect of sealing member.

Disclosure of Invention

Embodiments of the present application provide an electric toothbrush with improved sealing performance.

The embodiment of the application provides an electric toothbrush, which comprises a shell, a first bracket, a battery, a second bracket, a motor, an elastic piece and an elastic sealing piece, wherein the shell is provided with a mounting cavity and a through hole communicated with the mounting cavity; the first bracket is arranged in the mounting cavity; the battery is arranged on the first bracket; the second bracket is arranged in the mounting cavity, is provided with a first end part which is arranged adjacent to the through hole, and can relatively move along the axial direction of the shell; the motor is arranged on the second bracket, and an output shaft of the motor penetrates through the through hole; the two ends of the elastic piece respectively press against the first bracket and the second bracket; the sealing element is tightly sleeved on the output shaft, and the sealing element is pressed between the first end part and the inner wall of the shell by the elastic force of the elastic element along the axial direction.

In some embodiments, along the axial direction, the first bracket has a second end portion adjacent to the second bracket, the second bracket has a third end portion adjacent to the second end portion, the second end portion and the third end portion are spaced apart, and the elastic member is disposed between the second end portion and the third end portion.

In some embodiments, at least one of the second end portion and the third end portion is provided with a positioning protrusion, and the elastic member is sleeved on the positioning protrusion.

In some embodiments, the electric toothbrush further comprises a buffer piece with elasticity, the buffer piece is attached to the second end portion and/or the third end portion, and the elastic piece abuts against the second end portion or the third end portion corresponding to the buffer piece through the buffer piece.

In some embodiments, the electric toothbrush further comprises a circuit board, the circuit board is arranged on the first support, the motor is electrically connected with the circuit board through a cable, and the relative movement distance between the first support and the second support is greater than or equal to 0.5 mm and less than or equal to 10 mm.

In some embodiments, one of the first and second brackets is provided with a connection plate extending in the axial direction and toward the other of the two, and the other of the first and second brackets is slidably connected to the connection plate.

In some embodiments, the first support is provided with the connecting plate, the connecting plate is provided with a first sliding block, the second support is provided with a first sliding groove extending along the axis direction, the first sliding block extends into the first sliding groove and is in sliding connection with the groove wall of the first sliding groove, and the first sliding block is arranged at intervals with the motor.

In some embodiments, the first bracket comprises a bracket body, the bracket body defines a first accommodating cavity, the battery is arranged in the first accommodating cavity, the connecting plate extends from the edge of the bracket body, which is close to the inner wall of the shell, the second bracket comprises an upper shell and a lower shell, the upper shell is connected with the lower shell and defines a second accommodating cavity, the motor is arranged in the second accommodating cavity, the first end part is arranged in the upper shell, and the output shaft penetrates through the first end part.

In some embodiments, the electric toothbrush further comprises a circuit board disposed on the first support, the circuit board having a first terminal, the motor having a second terminal, the first terminal and the second terminal being electrically connected by a cable, the first terminal being located outside the first support, the second terminal being located outside the second support.

In some embodiments, the inner wall of the sealing member defines a first mating cavity, the outer wall of the sealing member defines a step surface, the sealing member is sleeved with the first end portion through the first mating cavity, the first end portion is sleeved with the output shaft, the first end portion is in sealing fit with the cavity wall of the first mating cavity, and the step surface abuts against the inner wall of the housing via hole.

In some embodiments, the electric toothbrush further comprises a locking member, an annular first sealing post and an annular second matching cavity surrounding the first sealing post are arranged at the bottom of the first matching cavity, an annular second sealing post is arranged at the first end part corresponding to the second matching cavity, the second sealing post stretches into the second matching cavity and is in sealing fit with the cavity wall of the second matching cavity, and the locking member tightly sleeves the first sealing post on the output shaft.

In some embodiments, the first bracket is provided with a second slider, the inner wall of the casing is provided with a guide rail extending along the axis direction, and the second slider is slidably connected with the guide rail.

In some embodiments, the extending direction of the output shaft forms an included angle with the axial direction of the casing.

The beneficial effects are that: the sealing element is tightly sleeved on the output shaft, and the elastic element applies acting force along the axial direction of the shell to the second bracket, so that the sealing element is clamped between the first end part of the second bracket and the inner wall of the shell, and the sealing effect of the sealing element can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an electric toothbrush according to an embodiment of the present application;

FIG. 2 is a schematic perspective view of an electric toothbrush without a housing provided in an embodiment of the present application;

fig. 3 is a schematic perspective view of a first and a second holder of the electric toothbrush of fig. 1;

FIG. 4 is a schematic cross-sectional view of an electric toothbrush provided in an embodiment of the present application;

FIG. 5 is an enlarged schematic view of a portion of FIG. 4 at A;

FIG. 6 is a schematic perspective view of a housing of the electric toothbrush of FIG. 1;

fig. 7 and 8 are schematic perspective views of the seal of the electric toothbrush of fig. 1 from two different perspectives.

Reference numerals illustrate:

1. an electric toothbrush; 10. a housing; 11. a mounting cavity; 12. a via hole; 13. end caps, 14, guide rails; 20. a first bracket; 21. a second end; 22. positioning the bulge; 23. a connecting plate; 24. a first slider; 25. a bracket body; 251. a first accommodation chamber; 26. a second slider; 27. a substrate; 28. a first side plate; 29. a second side plate; 30. a battery; 40. a second bracket; 41. a first end; 42. a third end; 43. a first chute; 44. an upper housing; 45. a lower housing; 46. a second seal post; 50. a motor; 51. an output shaft; 60. an elastic member; 70. a seal; 71. a first mating cavity; 72. a first seal post; 73. a second mating cavity; 74. a locking member; 75. a step surface; 80. a buffer member; 90. a circuit board; 100. a brush head.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

As shown in fig. 1 to 8, an electric toothbrush 1 includes a housing 10, a first holder 20, a battery 30, a second holder 40, a motor 50, an elastic member 60, and a sealing member 70.

Specifically, the casing 10 defines a mounting cavity 11 and a via hole 12 communicating with the mounting cavity 11, the mounting cavity 11 is disposed along an axis direction X of the casing 10, the via hole 12 is located at one end of the mounting cavity 11 near the motor 50, and an inner diameter of the via hole 12 is smaller than an inner diameter of the mounting cavity 11. The first bracket 20 is provided in the mounting chamber 11 along the axial direction X of the casing 10. The battery 30 is disposed in the mounting cavity 11 and mounted to the first bracket 20. The second bracket 40 is disposed in the mounting cavity 11 along the axial direction X of the housing, and the second bracket 40 is closer to the via hole 12 than the first bracket 20 in the axial direction X of the housing. The second bracket 40 has a first end 41 disposed adjacent the via 12. The first bracket 20 and the second bracket 40 are relatively movable along the axis direction X of the casing. The motor 50 is disposed in the mounting cavity 11 and mounted on the second bracket 40, the motor 50 has an output shaft 51, a portion of the output shaft 51 is disposed in the mounting cavity 11, and a portion of the output shaft 51 extends out of the housing 10 through the hole 12. Both ends of the elastic member 60 respectively press against the first bracket 20 and the second bracket 40. The seal 70 has elasticity, which is capable of being deformed when an external force is applied thereto. The sealing member 70 is closely fitted over the output shaft 51, and the sealing member 70 is pressed between the first end 41 of the second bracket 40 and the inner wall of the casing 10 in the axial direction X of the casing by the elastic force of the elastic member 60.

In the present embodiment, the elastic member 60 applies an elastic force in the housing axis direction X to the first bracket 20 and the second bracket 40 to fix the first bracket 20 and the second bracket 40 inside the housing 10. The elastic member 60 applies a force in the case axis direction X to the second bracket 40, so that the sealing member 70 is clamped between the first end 41 of the second bracket 40 and the inner wall of the case 10, thereby enabling the sealing effect of the sealing member 70 to be improved. In addition, by providing the elastic member 60, the influence of the machining error on the sealing and the positioning and mounting of the first bracket 20 and the second bracket 40 can be reduced, specifically, if the size of the first bracket 20 or the second bracket 40 is reduced due to the machining error, the elastic member 60 can be extended to compensate for the error, and similarly, if the size of the first bracket 20 or the second bracket 40 is increased due to the machining error, the elastic member 60 can be compressed to compensate for the error, so that the positioning and mounting problem caused by the machining error is reduced; on the other hand, the first bracket 20 and the second bracket 40 are separated by the elastic member 60, so that the influence of the vibration of the motor 50 on the second bracket 40 can be reduced, and the vibration of the casing 10 can be further reduced; on the other hand, since the elastic member 60 can be elastically deformed, the versatility of the motor 50 can be improved, that is, the motor 50 with different length dimensions can be adapted, or the adaptability of the motor 50 can be improved, for example, when a different motor 50 or battery 30 needs to be replaced, the original housing can be still used.

In this embodiment, the housing 10 has an end cap 13, the end cap 13 closing an opening on the side of the mounting chamber 11, and the via hole 12 penetrates the end cap 13 in the axial direction X of the housing. The sealing member 70 is compressed between the first end 41 of the second bracket 40 and the end cap 13 of the cabinet 10 by the elastic force of the elastic member 60. The first support 20 and the second support 40 can move relatively, specifically, the second support 40 may be fixed, the first support 20 may move relative to the second support 40, the first support 20 may be fixed, the second support 40 may move relative to the first support 20, or both the first support 20 and the second support 40 may move.

In this embodiment, the electric toothbrush may further include a brush head 100, the brush head 100 being located outside the housing 10, the brush head 100 being connected to the output shaft 51 of the motor 50. The seal 70 may have a good elasticity and a high coefficient of static friction, and the seal 70 is tightly sleeved on the output shaft 51 to ensure that the two parts do not slide relatively. When the output shaft 51 of the motor 50 reciprocates around the axis, the seal 70 generates distortion to absorb kinetic energy and convert the kinetic energy into elastic potential energy, so that the seal 70 can be kept in sealing engagement with the output shaft 51.

In some embodiments, the first bracket 20 has a second end 21 adjacent to the second bracket 40, the second bracket 40 has a third end 42 adjacent to the second end 21, the second end 21 and the third end 42 are spaced apart by a distance, and the elastic member 60 may be disposed between the second end 21 and the third end 42 along the axial direction X of the cabinet. The elastic member 60 is elastically deformable along the axial direction X of the casing, and the elastic member 60 is compressed when the distance between the second end portion 21 and the third end portion 42 is reduced, that is, when the distance between the first bracket 20 and the second bracket 40 is reduced; the elastic member 60 is stretched when the distance between the second end portion 21 and the third end portion 42 increases, that is, when the distance between the first bracket 20 and the second bracket 40 increases. The elastic member 60 may be a spring, an elastic sleeve, a spring piece, or the like, and the elastic member 60 is exemplified as a spring capable of being elastically deformed in the axial direction X of the casing.

Further, the second end 21 is provided with a positioning protrusion 22 protruding toward the third end 42, and the elastic member 60 may be sleeved on the positioning protrusion 22, so as to facilitate positioning and installation of the elastic member 60. In an alternative construction, the third end 42 is provided with a positioning protrusion 22 protruding towards the second end 21, and the elastic member 60 may be sleeved on the positioning protrusion 22. In another alternative structure, the second end portion 21 and the third end portion 42 are provided with positioning protrusions 22 protruding towards each other, and two ends of the elastic member 60 are respectively sleeved on the two positioning protrusions 22. In yet another alternative construction, at least one of the second end 21 and the third end 42 is provided with a detent recess into which the end of the resilient member 60 is inserted.

Further, the electric toothbrush 1 may further include a buffer member 80 having elasticity, and at least one of the second end portion 21 and the third end portion 42 is attached with the buffer member 80. For example, when the second end 21 is attached with the buffer member 80, the elastic member 60 indirectly abuts against the second end 21 through the buffer member 80; when the third end 42 is attached with the buffer member 80, the elastic member 60 indirectly presses the third end 42 through the buffer member 80. By providing the buffer 80, the effect of buffering can be achieved, noise generated at the time of collision can be reduced, and vibration transmitted to the first bracket 20 can be reduced. The buffer 80 is made of a material having elasticity, such as rubber, silica gel, foam, etc., and the material is not limited herein. The buffer 80 may be in the form of a sheet, a block, or the like, and the shape thereof is not limited. The buffer member 80 may be attached to the second end 21 or the third end 42 by glue, insert, or fastener.

In some embodiments, the electric toothbrush 1 further comprises a circuit board 90, the circuit board 90 being located within the mounting cavity 11 and mounted to the first bracket 20, the motor 50 and the circuit board 90 being electrically connected by a cable. The relative movement distance of the first bracket 20 and the second bracket 40 in the axial direction X of the casing is 0.5 mm or more and 10 mm or less. In order to secure the fixing action of the elastic member 60 to the first bracket 20, the second bracket 40 and the sealing member 70, the relative moving distance of the first bracket 20 and the second bracket 40 is generally not less than 0.5 mm. In order to avoid the cable from being torn, the relative movement distance of the first bracket 20 and the second bracket 40 is not more than 10 mm, and in this movement distance range, the movement range of the cable can be prevented from being excessively large.

The circuit board 90 may have a first terminal for connecting the cables and the motor 50 may have a second terminal for connecting the cables, the first terminal and the corresponding second terminal being electrically connected by the cables. The first terminal may be located at the outside of the first bracket 20, and the second terminal may be located at the outside of the second bracket 40 such that both the first terminal and the second terminal are exposed to the outside, thereby facilitating welding of the cable after the connection of the first bracket 20 and the second bracket 40 is completed, and thus facilitating the complete machine assembly of the electric toothbrush 1.

In some embodiments, one of the first and second brackets 20 and 40 is provided with a connection plate 23, the connection plate 23 being extendable toward the other of the first and second brackets 20 and 40 in the axial direction X of the cabinet, and the other of the first and second brackets 20 and 40 being slidably connected with the connection plate 23 so that the first and second brackets 20 and 40 are relatively movable. By providing the connection plate 23, the first bracket 20 and the second bracket 40 can be assembled into a single body and then be installed in the housing 10, so that the electric toothbrush 1 is assembled as a whole.

Further, the connecting plate 23 may be disposed on the first support 20, the connecting plate 23 is provided with a first slider 24, the second support 40 is provided with a first sliding groove 43 extending along the axial direction X of the casing, the first slider 24 extends into the first sliding groove 43 and can be slidably connected with the groove wall of the first sliding groove 43, and the first support 20 and the second support 40 can move back and forth along the axial direction X of the casing through the sliding connection between the first slider 24 and the first sliding groove 43. Since the enamel wire of the motor 50 is generally exposed, the first slider 24 may be spaced apart from the motor 50 by a certain distance in order to prevent the first slider 24 from scraping off the insulation enamel on the enamel wire during the sliding process, thereby causing a short circuit. In an alternative embodiment, the connecting plate 23 is provided with a first slot 43 extending in the housing axis direction X, while the second bracket 40 is correspondingly provided with a first slide 24, the first slide 24 extending into the first slot 43 and being slidably connected to the slot wall of the first slot 43.

Further, the first bracket 20 includes a bracket body 25, the bracket body 25 defines a first receiving cavity 251, the first receiving cavity 251 is shaped to fit the battery 30, and the battery 30 is mounted in the first receiving cavity 251. The bracket body 25 may include a base plate 27, the base plate 27 extends along an axis direction X of the chassis, a cross section of the base plate 27 perpendicular to the axis direction X is substantially arc-shaped, one end of the base plate 27 close to the second bracket 40 is provided with a first side plate 28, one end of the base plate 27 far away from the second bracket 40 is provided with a second side plate 29, and the first side plate 28, the second side plate 29 and the base plate 27 enclose the first accommodating cavity 251. The first side plate 28 corresponds to the second end 21 of the first bracket 20, and the connection plate 23 is provided at a top edge of the first side plate 28 near the inner wall of the casing 10.

The second bracket 40 includes an upper case 44 and a lower case 45, the upper case 44 and the lower case 45 being integrally connected by a fastener and defining a second receiving cavity having a shape and size adapted to the motor 50, the motor 50 being installed inside the second receiving cavity. The first end 41 of the second bracket 40 may be disposed on the upper housing 44, the upper housing 44 is slidably connected to the connection plate 23, the connection plate 23 may have a first sliding groove 43 extending along the axial direction X of the casing, the upper housing 44 is correspondingly provided with a first sliding block 24, and the first sliding block 24 extends into the first sliding groove 43 and is capable of moving back and forth in the first sliding groove 43.

Further, as shown in fig. 2, 3 and 6, the first bracket 20 is provided with a second slider 26, the inner wall of the casing 10 is provided with a guide rail 14 extending along the axial direction X of the casing, and the second slider 26 is slidably connected to the guide rail 14. By providing the second slider 26 and the guide rail 14, positioning and auxiliary mounting functions are performed. By arranging the second slider 26 on the first bracket 20, a certain interference force generated by direct contact between the second bracket 40 and the inner wall of the casing 10 during assembly is avoided, so that the elastic member 60 is compressed, and the installation of the first bracket 20 is further affected.

The second slide blocks 26 extend along the axial direction X of the casing, and the second slide blocks 26 may be two and may be symmetrically disposed about the axial direction X of the casing, and the inner wall of the casing 10 is provided with two guide rails 14. The second slider 26 may be provided on a base plate 27 of the first bracket 20, which may extend from the second side plate 29 all the way to the first side plate 28.

In some embodiments, as shown in fig. 4, 5, 7 and 8, the sealing member 70 is a sleeve structure penetrating front and back along the axial direction X of the casing, the inner wall of the sleeve structure defines a first mating cavity 71, the cavity bottom of the first mating cavity 71 is provided with an annular first sealing post 72 and an annular second mating cavity 73 surrounding the first sealing post 72, the first mating cavity 71 is communicated with the second mating cavity 73, and the first mating cavity 71, the second mating cavity 73, the first sealing post 72 and the casing 10 can be coaxial. The first end 41 of the second bracket 40 is provided with an annular second sealing post 46 corresponding to the second matching cavity 73 in a protruding manner, and the second sealing post 46 extends into the second matching cavity 73 and can be in sealing fit with the cavity wall of the second matching cavity 73. The output shaft 51 of the motor 50 is threaded through the first sealing post 72, and the first sealing post 72 is tightly sleeved on the output shaft 51. The electric toothbrush 1 may further include a locking member 74, the locking member 74 tightly fitting the first sealing post 72, thereby tightly fitting the first sealing post 72 to the output shaft 51 of the motor 50. The outer wall of the first sealing post 72 may be provided with an annular recess in which the retaining member 74 may nest. The sealing member 70 is tightly fitted on the output shaft 51 of the motor 50 by the locking member 74, so that the sealing effect can be improved and the inflow of liquid into the interior of the casing 10 can be prevented. The outer wall of the seal 70 is stepped, having a stepped surface 75, and the stepped surface 75 is pressed tightly against the end cover 13 of the casing 10 in the axial direction X of the casing.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (13)

1. An electric toothbrush, characterized in that the electric toothbrush comprises,

the shell is used for limiting an installation cavity and a through hole communicated with the installation cavity;

the first bracket is arranged in the mounting cavity;

the battery is arranged on the first bracket;

the second bracket is arranged in the mounting cavity, is provided with a first end part which is arranged adjacent to the through hole, and can relatively move along the axial direction of the shell;

the motor is arranged on the second bracket, and an output shaft of the motor penetrates through the through hole;

the two ends of the elastic piece respectively press against the first bracket and the second bracket;

and the sealing piece is provided with an elastic sealing piece, the sealing piece is tightly sleeved on the output shaft, and the sealing piece is pressed between the first end part and the inner wall of the shell by the elastic force of the elastic piece along the axial direction.

2. The electric toothbrush according to claim 1, wherein the first bracket has a second end portion adjacent to the second bracket in the axial direction, the second bracket has a third end portion adjacent to the second end portion, the second and third end portions are spaced apart, and the elastic member is provided between the second and third end portions.

3. The electric toothbrush according to claim 2, wherein at least one of the second end portion and the third end portion is provided with a positioning protrusion, and the elastic member is sleeved on the positioning protrusion.

4. The electric toothbrush according to claim 2, further comprising a buffer member having elasticity, wherein the buffer member is attached to the second end portion and/or the third end portion, and wherein the elastic member presses the second end portion or the third end portion corresponding to the buffer member through the buffer member.

5. The electric toothbrush according to claim 1, further comprising a circuit board provided to the first holder, wherein the motor and the circuit board are electrically connected by a cable, and wherein a relative movement distance of the first holder and the second holder is 0.5 mm or more and 10 mm or less.

6. The electric toothbrush according to claim 1 wherein one of the first and second brackets is provided with a web extending in the axial direction and toward the other of the two, the other of the first and second brackets being slidably connected to the web.

7. The electric toothbrush according to claim 6, wherein the first support is provided with the connection plate, the connection plate is provided with a first slide block, the second support is provided with a first slide groove extending along the axis direction, the first slide block extends into the first slide groove and is in sliding connection with a groove wall of the first slide groove, and the first slide block is arranged at a distance from the motor.

8. The electric toothbrush of claim 6, wherein the first bracket includes a bracket body defining a first receiving cavity, the battery is disposed in the first receiving cavity, the connecting plate extends from an edge of the bracket body adjacent to the inner wall of the housing, the second bracket includes an upper housing and a lower housing, the upper housing and the lower housing are connected and defining a second receiving cavity, the motor is disposed in the second receiving cavity, the first end is disposed in the upper housing, and the output shaft extends through the first end.

9. The electric toothbrush of claim 1, further comprising a circuit board disposed on the first support, the circuit board having a first terminal, the motor having a second terminal, the first terminal and the second terminal being electrically connected by a cable, the first terminal being located on an exterior of the first support, the second terminal being located on an exterior of the second support.

10. The electric toothbrush of claim 1, wherein the inner wall of the seal defines a first mating cavity, the outer wall of the seal defines a stepped surface, the seal is sleeved with the first end portion through the first mating cavity, the first end portion is sleeved with the output shaft, the first end portion is in sealing engagement with the cavity wall of the first mating cavity, and the stepped surface abuts against the inner wall of the housing via.

11. The electric toothbrush according to claim 10 further comprising a locking member, wherein the bottom of the first mating cavity is provided with an annular first sealing post and an annular second mating cavity surrounding the first sealing post, the first end is provided with an annular second sealing post corresponding to the second mating cavity, the second sealing post extends into the second mating cavity and is in sealing engagement with the wall of the second mating cavity, and the locking member tightly engages the first sealing post to the output shaft.

12. The electric toothbrush according to claim 1, wherein the first holder is provided with a second slider, the inner wall of the housing is provided with a guide rail extending in the axial direction, and the second slider is slidably connected to the guide rail.

13. The electric toothbrush according to claim 1, wherein the extending direction of the output shaft is disposed at an angle to the axial direction of the housing.

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