CN215349665U - Waterproof structure of electric toothbrush and electric toothbrush - Google Patents

Abstract

The application discloses electric toothbrush's waterproof construction and electric toothbrush belongs to electric toothbrush technical field. The waterproof structure of the electric toothbrush comprises an end cover and an elastic piece. The end cap is connected with the elastic piece. The end cover is provided with a first through hole, and the waterproof piece is provided with a second through hole. The axes of the first through hole and the second through hole are overlapped and are used for the output shaft of the motor of the electric toothbrush to penetrate through. The aperture of the first through hole is larger than the diameter of the output shaft of the motor, and the aperture of the second through hole is smaller than the diameter of the output shaft of the motor. When the waterproof structure is installed on the electric toothbrush, the aperture of the second through hole of the elastic part is smaller than the diameter of the output shaft of the motor, so that the elastic part can be in interference fit with the output shaft of the motor, and water flowing down along the output shaft of the motor is blocked. Meanwhile, the elastic piece is connected with the end cover and is not easy to break, so that the waterproof performance of the electric toothbrush can be improved.

Description

Waterproof structure of electric toothbrush and electric toothbrush

Technical Field

The application relates to the technical field of electric toothbrushes, in particular to a waterproof structure of an electric toothbrush and the electric toothbrush.

Background

Electric toothbrushes generally include a motor, a housing, and an end cap. The shell is used for accommodating the motor, the end cover is used for sealing the shell, and an output shaft of the motor penetrates through the end cover and then is connected with the brush head. When the electric toothbrush works, the output shaft of the motor rotates rapidly, so that the brush head is driven to vibrate or rotate rapidly, and the purpose of cleaning teeth is achieved.

In the related art, a waterproof elastic member is connected to a portion of an output shaft of the motor, which extends out of the housing and the end cover. The waterproof elastic member is generally made of silicone rubber. Be equipped with the recess that is used for holding the spring on the output shaft of motor, the one end of spring is located the recess, and the other end is connected with waterproof elastic component to taut waterproof elastic component makes waterproof elastic component hug closely on the output shaft of motor. When water flows down along the output shaft of the motor, the waterproof elastic piece tightly attached to the output shaft of the motor can block the water flow, so that the water flow is prevented from flowing into the shell along the output shaft of the motor.

However, the waterproof elastic member is easily broken when the waterproof elastic member is pulled by the spring, thereby affecting the waterproof effect.

SUMMERY OF THE UTILITY MODEL

The application provides an electric toothbrush's waterproof construction and electric toothbrush, through linking waterproof elastic component and end cover together, be difficult for breaking to can promote electric toothbrush's waterproof performance. The technical scheme is as follows:

in a first aspect, there is provided a waterproof structure of an electric toothbrush, comprising: an end cap and an elastic member;

the end cover is connected with the elastic piece;

the end cover is provided with a first through hole, the elastic part is provided with a second through hole, the axis of the first through hole is overlapped with the axis of the second through hole, the first through hole and the second through hole are used for an output shaft of a motor of the electric toothbrush to penetrate through, the aperture of the first through hole is larger than the diameter of the output shaft, and the aperture of the second through hole is smaller than the diameter of the output shaft.

In the present application, a waterproof structure of an electric toothbrush includes an end cap and an elastic member. The end cap is connected with the elastic piece. The end cover is provided with a first through hole, and the waterproof piece is provided with a second through hole. The axes of the first through hole and the second through hole are overlapped and are used for the output shaft of the motor of the electric toothbrush to penetrate through. The aperture of the first through hole is larger than the diameter of the output shaft of the motor, and the aperture of the second through hole is smaller than the diameter of the output shaft of the motor. When the waterproof structure is installed on the electric toothbrush, the aperture of the second through hole of the elastic part is smaller than the diameter of the output shaft of the motor, so that the elastic part can be in interference fit with the output shaft of the motor, and water flowing down along the output shaft of the motor is blocked. Meanwhile, the elastic piece is connected with the end cover and is not easy to break, so that the waterproof performance of the electric toothbrush can be improved.

Optionally, the end cap and the resilient member are integrally formed.

Optionally, the end cap has a first threaded hole for connecting to a housing of the electric toothbrush.

Optionally, the end cap includes a fixing portion and a first connecting portion, and the fixing portion and the first connecting portion are integrally formed;

the first screw hole is located the fixed part, the first through hole is located first connecting portion with the fixed part, the elastic component with first connecting portion connect.

Optionally, the elastic member comprises a waterproof portion and a second connecting portion, and the waterproof portion and the second connecting portion are integrally formed;

the second through hole is positioned in the waterproof part;

the outer surface of the first connecting portion is connected with the inner surface of the second connecting portion.

Optionally, the material of the end cap is polycarbonate, acrylonitrile-butadiene-styrene copolymer, polystyrene, or acrylonitrile-styrene copolymer;

the elastic part is made of silica gel, ethylene-vinyl acetate copolymer, ethylene-octene copolymer or styrene thermoplastic elastomer.

In a second aspect, there is provided an electric toothbrush comprising a water resistant construction as described in the first aspect.

Optionally, the electric toothbrush further comprises: a first housing and a motor;

the first shell is provided with a first cavity and a first opening used for exposing the first cavity, and the waterproof structure is connected with one end of the first shell, which is provided with the first opening; the motor is located in the first cavity, and an output shaft of the motor penetrates through the first through hole and the second through hole.

Optionally, the end cap has a first threaded hole, the end of the first housing having the first opening has a second threaded hole, the electric toothbrush further comprising: a screw;

the end cover comprises a fixing part and a first connecting part, and the fixing part and the first connecting part are integrally formed; the first screw hole is positioned on the fixing part, the first through hole is positioned on the first connecting part and the fixing part, and the elastic part is connected with the first connecting part;

the screw penetrates through the first screw hole and the second screw hole to connect the end cover and the first shell.

Optionally, the elastic member comprises a waterproof portion and a second connecting portion, and the waterproof portion and the second connecting portion are integrally formed; the first through hole is positioned in the waterproof part; the outer surface of the first connecting part is connected with the inner surface of the second connecting part, and the outer surface of the second connecting part is provided with first threads;

the electric toothbrush further comprises: the second shell is provided with a second cavity and a second opening used for exposing the second cavity, and a second thread is arranged on the inner surface of one end, provided with the second opening, of the second shell and used for being connected with the first thread.

It is understood that the beneficial effects of the second aspect can be referred to the related description of the first aspect, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic front view of a waterproof structure provided in an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a waterproof structure provided in an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of an end cap according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of an elastic member according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a first housing provided in accordance with an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of a first powered toothbrush provided in accordance with an embodiment of the present application;

FIG. 7 is a schematic perspective view of an electric toothbrush provided in accordance with an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a second housing provided in accordance with an embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of a second powered toothbrush provided in accordance with an embodiment of the present application.

Wherein, the meanings represented by the reference numerals of the figures are respectively as follows:

01. an electric toothbrush;

10. a waterproof structure;

12. an end cap;

1202. a first through hole;

122. a fixed part;

1222. a first screw hole;

124. a first connection portion;

14. an elastic member;

1402. a second through hole;

142. a waterproof section;

144. a second connecting portion;

1442. a first thread;

210. a first housing;

2102. a second screw hole;

212. a first cavity;

214. a first opening;

220. a motor;

222. an output shaft;

230. a screw;

240. a second housing;

242. a second cavity;

244. a second opening;

246. a second thread.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

It should be understood that reference to "a plurality" in this application means two or more. In the description of the present application, "/" means "or" unless otherwise stated, for example, a/B may mean a or B; "and/or" herein is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, for the convenience of clearly describing the technical solutions of the present application, the terms "first", "second", and the like are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

Before explaining the embodiments of the present application in detail, an application scenario of the embodiments of the present application will be described.

Electric toothbrushes typically include a motor, a housing, an end cap, and the like. The shell is used for accommodating the motor, and the end cover is used for being connected with the shell. The end cap has a cap hole through which an output shaft of the motor passes. The output shaft of the motor is connected with the brush head after passing through the cover hole on the end cover. When the electric toothbrush works, the output shaft of the motor rotates rapidly and drives the brush head to vibrate or rotate rapidly, so as to achieve the purpose of cleaning teeth.

In the related art, the part of the output shaft of the motor, which extends out of the shell and the end cover, is also connected with a waterproof elastic piece. The waterproof elastic piece is used for preventing water flow on the brush head from flowing into the shell along the output shaft of the motor. However, the waterproof elastic member connected to the output shaft of the motor through the spring is easily broken, affecting the waterproof effect of the electric toothbrush.

Therefore, the embodiment of the application provides a waterproof structure of an electric toothbrush and the electric toothbrush, and the waterproof structure and the electric toothbrush are not easy to break by connecting the waterproof elastic piece and the end cover together, so that the waterproof performance of the electric toothbrush can be improved.

The waterproof structure of the electric toothbrush provided in the embodiments of the present application will be explained in detail below. In the embodiments of the present application, the connection between two devices refers to a fixed connection, i.e., the two devices are kept in a relative position by the connection. For example, the fixing connection may be by adhesive bonding, by screwing, or integrally molding.

Fig. 1 is a front view schematically illustrating a waterproof structure 10 of an electric toothbrush 01 according to an embodiment of the present invention, and fig. 2 is a cross-sectional view schematically illustrating the waterproof structure 10 according to the embodiment of the present invention. As shown in fig. 1 and 2, the waterproof structure 10 includes an end cap 12 and an elastic member 14.

The waterproof structure 10 is used for the electric toothbrush 01. Generally, the electric toothbrush 01 includes a housing for housing the motor 220 and the motor 220. In order to distinguish from other housings of the electric toothbrush 01 described below, in the embodiments of the present application, a housing in which the electric toothbrush 01 is provided with the motor 220 is referred to as a first housing 210. The waterproof structure 10 is used in connection with the first housing 210 of the electric toothbrush 01 to prevent water from flowing into the first housing 210 along the output shaft 222 of the motor 220. The waterproof structure 10 includes an end cap 12 and an elastic member 14. The resilient member 14 is coupled to the end cap 12 such that the relative positions of the resilient member 14 and the end cap 12 remain fixed. In this case, when the end cap 12 is fixed in position, the position of the elastic member 14 is also fixed.

The end cap 12 has a first through hole 1202, and the first through hole 1202 is used for passing through the output shaft 222 of the motor 220 of the electric toothbrush 01. The elastic member 14 has a second through hole 1402, and the second through hole 1402 is also used for passing the output shaft 222 of the motor 220 of the electric toothbrush 01. When the waterproof structure 10 is connected to the first housing 210 of the electric toothbrush 01, the output shaft 222 of the motor 220 may pass through the first through hole 1202 of the end cap 12 and pass through the second through hole 1402 of the elastic member 14 to extend out of the first housing 210 and the waterproof structure 10. The aperture of the first through hole 1202 may be equal to or slightly larger than the diameter of the output shaft 222 of the motor 220 to prevent the end cover 12 from influencing the rotation of the output shaft 222 of the motor 220 and to function to limit the position of the output shaft 222 of the motor 220. The second through hole 1402 has a hole diameter smaller than the diameter of the output shaft 222 of the motor 220. In this case, since the elastic member 14 has elasticity, after the output shaft 222 of the motor 220 passes through the second through hole 1402, the elastic member 14 with a constant position does not affect the rotation of the output shaft 222 of the motor 220. Meanwhile, since the aperture of the second through hole 1402 is smaller than the diameter of the output shaft 222 of the motor 220, the elastic member 14 may be in interference fit with the output shaft 222 of the motor 220, thereby blocking the water flowing down along the output shaft 222 of the motor 220. The elastic member 14 of the waterproof structure 10 is connected to the end cap 12, and is not easily broken, so that the waterproof performance of the electric toothbrush 01 can be improved.

Further, the end cap 12 may be made of a hard glue material, and the elastic member 14 may be made of a soft glue material.

Specifically, the end cap 12 may be made of a hard rubber material so as to be coupled to the first housing 210, provide a fixing means for the elastic member 14, and function to define the position of the output shaft 222 of the motor 220. For example, the material of the end cap 12 may be one of polycarbonate, acrylonitrile butadiene styrene, polystyrene, or acrylonitrile styrene. The elastic member 14 may be made of a soft rubber material, so as to be in interference fit with the output shaft 222 of the motor 220, thereby playing a waterproof role. For example, the material of the elastic member 14 may be silicone rubber, ethylene-vinyl acetate copolymer, ethylene-octene copolymer, or styrene-based thermoplastic elastomer.

In the present embodiment, the elastic member 14 and the end cap 12 connected together may be integrally formed. In manufacturing the waterproof structure 10, the end cap 12 may be manufactured by injecting the hard glue into the first mold. The first mold here is the mold used to make the end cap 12. After the end cap 12 is manufactured, the end cap 12 is placed in a second mold, and soft gel is injected into the second mold, thereby forming the elastic member 14 connected to the end cap 12. The second mold is herein a mold for making the elastic member 14, and includes both a portion for making the elastic member 14 and a portion for receiving a joint where the end cap 12 and the elastic member 14 are joined. The elastic member 14 and the end cap 12 are integrally formed, so that the connection between the elastic member 14 and the end cap 12 is firmer, and the electric toothbrush 01 can be assembled more conveniently, thereby saving the assembling time of the electric toothbrush 01 and reducing the assembling cost.

Fig. 3 is a schematic cross-sectional view of end cap 12 provided in an embodiment of the present application. As shown in fig. 3, end cap 12 has a first threaded bore 1222. The first screw hole 1222 is used to connect the first housing 210 of the electric toothbrush 01.

Specifically, as shown in fig. 3, the end cap 12 includes a fixing portion 122 and a first connecting portion 124. The fixing portion 122 and the first connecting portion 124 are integrally formed. The fixing portion 122 of the cap 12 is used to connect with the first housing 210 of the electric toothbrush 01. The first screw holes 1222 are located at the fixing portion 122 of the end cap 12, and when the end cap 12 is connected to the first housing 210, screws can be installed in the first screw holes 1222 to fix the end cap 12 to the first housing 210. The first connection portion 124 of the end cap 12 is used to connect the resilient member 14. When the end cap 12 includes the fixing portion 122 and the first connecting portion 124, the first through hole 1202 of the end cap 12 is located at the fixing portion 122 and the first connecting portion 124, so that the output shaft 222 of the motor 220 can penetrate through the fixing portion 122 and the first connecting portion 124 of the end cap 12 through the first through hole 1202.

Further, fig. 4 is a schematic cross-sectional view of the elastic member 14 provided in the embodiment of the present application. As shown in fig. 4, the elastic member 14 includes a waterproof portion 142 and a second connecting portion 144. The waterproof portion 142 and the second connecting portion 144 are integrally formed. Wherein the second connecting portion 144 of the elastic member 14 is used for connecting with the first connecting portion 124 of the end cap 12. As can be seen from fig. 2 to 4, the second connecting portion 144 of the elastic member 14 has an inner surface, and the inner surface of the second connecting portion 144 is used for connecting with the outer surface of the first connecting portion 124, so as to connect the elastic member 14 with the end cap 12. The second through hole 1402 of the elastic member 14 is located at the waterproof portion 142. In other words, the waterproof portion 142 is configured to be in interference fit with the output shaft 222 of the motor 220, so as to block the water flowing down along the output shaft 222 of the motor 220 and prevent the water from flowing into the first housing 210 of the electric toothbrush 01.

In the present embodiment, the waterproof structure 10 includes an end cap 12 and an elastic member 14. The end cap 12 is connected to the resilient member 14. The end cap 12 has a first through hole 1202 and the waterproof member has a second through hole 1402. The axes of the first through hole 1202 and the second through hole 1402 coincide for the output shaft 222 of the motor 220 of the electric toothbrush 01 to pass through. The first through hole 1202 has a diameter larger than the diameter of the output shaft 222 of the motor 220, and the second through hole 1402 has a diameter smaller than the diameter of the output shaft 222 of the motor 220. When the waterproof structure 10 is installed on the electric toothbrush 01, since the aperture of the second through hole 1402 of the elastic member 14 is smaller than the diameter of the output shaft 222 of the motor 220, the elastic member 14 can be in interference fit with the output shaft 222 of the motor 220, thereby blocking water flowing down along the output shaft 222 of the motor 220. Meanwhile, the elastic member 14 in the waterproof structure 10 is connected to the end cap 12, and is not easily broken, so that the waterproof performance of the electric toothbrush 01 can be improved. The elastic member 14 and the end cap 12 in the waterproof structure 10 are connected to achieve the purpose of fixing the position, and the elastic member 14 does not need to be tightly attached to the output shaft 222 of the motor 220 through a spring, so that the waterproof elastic member 14 can be prevented from being broken when the waterproof elastic member 14 is tensioned through the spring, and the waterproof performance of the electric toothbrush 01 can be improved. In the waterproof structure 10, the end cap 12 may be made of a hard glue material, so as to be connected to the first housing 210, provide a fixing means for the elastic member 14, and function to limit the position of the output shaft 222 of the motor 220. The elastic member 14 may be made of a soft rubber material, so as to be in interference fit with the output shaft 222 of the motor 220, thereby playing a waterproof role. The elastic member 14 and the end cap 12 may be integrally formed, so that the connection between the elastic member 14 and the end cap 12 is more firm, and the assembly of the electric toothbrush 01 is more convenient, thereby saving the assembly time of the electric toothbrush 01 and reducing the assembly cost.

The embodiment of the present application also provides an electric toothbrush 01, which includes a waterproof structure 10 as in any of the above embodiments.

Specifically, the waterproof structure 10 includes an end cap 12 and an elastic member 14. The end cap 12 is connected to the resilient member 14. The end cap 12 has a first through hole 1202, the elastic member 14 has a second through hole 1402, the axis of the first through hole 1202 coincides with the axis of the second through hole 1402, the first through hole 1202 and the second through hole 1402 are used for the output shaft 222 of the motor 220 of the electric toothbrush 01 to pass through, the aperture of the first through hole 1202 is larger than the diameter of the output shaft 222 of the motor 220, and the aperture of the second through hole 1402 is smaller than the diameter of the output shaft 222 of the motor 220. When the waterproof structure 10 is installed on the electric toothbrush 01, since the aperture of the second through hole 1402 of the elastic member 14 is smaller than the diameter of the output shaft 222 of the motor 220, the elastic member 14 can be in interference fit with the output shaft 222 of the motor 220, thereby blocking water flowing down along the output shaft 222 of the motor 220. Meanwhile, the elastic member 14 of the waterproof structure 10 is connected to the end cap 12, so that the waterproof elastic member 14 is prevented from being broken when the waterproof elastic member 14 is tensioned by a spring, and the waterproof performance of the electric toothbrush 01 is improved.

Further, the end cap 12 and the elastic member 14 are integrally formed. The material of the end cap 12 is one of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polystyrene, or acrylonitrile-styrene copolymer. The material of the elastic member 14 is one of silicone, ethylene-vinyl acetate copolymer, ethylene-octene copolymer, and styrene thermoplastic elastomer.

Fig. 5 is a schematic sectional view of the first housing 210 according to the embodiment of the present application, and fig. 6 is a schematic sectional view of an electric toothbrush 01 according to the embodiment of the present application. As shown in fig. 5 and 6, the electric toothbrush 01 further includes a first housing 210 and a motor 220.

Specifically, the first housing 210 is used to provide a motor 220. The first housing 210 has a first cavity 212 and a first opening 214 for exposing the first cavity 212. The motor 220 is located within the first cavity 212. A battery, a controller connected between the battery and the motor 220, and the like may also be disposed in the first cavity 212. The waterproof structure 10 is connected to one end of the first housing 210 having the first opening 214. As will be understood in conjunction with the above embodiments, the waterproof structure 10 includes the elastic member 14 and the end cap 12. After the waterproof structure 10 is connected to the first housing 210, the output shaft 222 of the motor 220 penetrates through the first through hole 1202 and the second through hole 1402 of the waterproof structure 10, so that the output shaft 222 of the motor 220 extends out of the first housing 210 and the waterproof structure 10 from the first through hole 1202 and the second through hole 1402. The aperture of the first through hole 1202 may be equal to or slightly larger than the diameter of the output shaft 222 of the motor 220 to prevent the end cover 12 from influencing the rotation of the output shaft 222 of the motor 220 and to function to limit the position of the output shaft 222 of the motor 220. The aperture of the second through hole 1402 is smaller than the diameter of the output shaft 222 of the motor 220, so that the elastic element 14 is in interference fit with the output shaft 222 of the motor 220, and since the elastic element 14 has elasticity, after the output shaft 222 of the motor 220 passes through the second through hole 1402, the elastic element 14 with a constant position does not affect the rotation of the output shaft 222 of the motor 220. Generally, a brush head may be connected to an end of the output shaft 222 of the motor 220 extending out of the first housing 210. In this case, when the water dropping from the brush head flows along the output shaft 222 of the motor 220, the water is stopped by the elastic member 14 which is in interference fit with the output shaft 222 of the motor 220, so that the water is prevented from flowing into the first housing 210.

Fig. 7 is a perspective view of an electric toothbrush 01 according to an embodiment of the present disclosure. Referring to fig. 2 to 7, the end cap 12 has a first screw hole 1222, the end of the first housing 210 having the first opening 214 has a second screw hole 2102, and the screw 230 passes through the first screw hole 1222 and the second screw hole 2102, thereby connecting the end cap 12 and the first housing 210 together.

Specifically, the end cap 12 includes a fixing portion 122 and a first connecting portion 124, and the fixing portion 122 and the first connecting portion 124 are integrally formed. The first screw hole 1222 is located at the fixing portion 122. The first through hole 1202 is located at the first connecting portion 124 and the fixing portion 122. The elastic member 14 is connected to the first connection portion 124. The screw 230 passes through the first screw hole 1222 and the second screw hole 2102 to connect the end cap 12 with the first housing 210.

Fig. 8 is a schematic cross-sectional view of the second housing 240 according to the embodiment of the present application. As can be seen from the above-described embodiments and fig. 6 and 7, the elastic member 14 includes the waterproof portion 142 and the second connecting portion 144. The waterproof portion 142 and the second connecting portion 144 are integrally formed. The first through hole 1202 is located at the waterproof portion 142. An outer surface of the first connection portion 124 is connected to an inner surface of the second connection portion 144, and an outer surface of the second connection portion 144 is provided with first threads 1442. In the present embodiment, the electric toothbrush 01 further includes a second housing 240 as shown in fig. 8. The second housing 240 has a second cavity 242 and a second opening 244 for exposing the second cavity 242. The inner surface of the end of the second housing 240 having the second opening 244 is provided with second screw threads 246, and the second screw threads 246 are used to be coupled with the first screw threads 1442. When the electric toothbrush 01 is not in use, the second housing 240 may be rotatably coupled to the elastic member 14 by the first and second screw threads 1442 and 246. Fig. 9 shows a schematic sectional view of the electric toothbrush 01 when the second housing 240 is coupled with the elastic member 14. At this time, a brush head (not shown) located at an end of the output shaft 222 of the motor 220 away from the first housing 210 is located in a sealed space formed by the second housing 240 and the elastic member 14, so that dust can be prevented from being attached to the brush head. Meanwhile, after the second housing 240 is connected with the elastic member 14, water outside the electric toothbrush 01 can be prevented from entering the first housing 210 and the second housing 240, thereby achieving a dual waterproof effect.

In the embodiment of the present application, the electric toothbrush 01 includes the waterproof structure 10, and when the waterproof structure 10 is installed in the electric toothbrush 01, since the second through hole 1402 of the elastic member 14 has a smaller diameter than the output shaft 222 of the motor 220, the elastic member 14 can be in interference fit with the output shaft 222 of the motor 220, thereby blocking water flowing down along the output shaft 222 of the motor 220. Meanwhile, the elastic member 14 of the waterproof structure 10 is connected to the end cap 12, so that the waterproof elastic member 14 is prevented from being broken when the waterproof elastic member 14 is tensioned by a spring, and the waterproof performance of the electric toothbrush 01 is improved. The elastic member 14 of the waterproof structure 10 is connected to the end cap 12 to fix the position, and is not easily broken, so that the waterproof performance of the electric toothbrush 01 can be improved. In the waterproof structure 10, the end cap 12 may be made of a hard glue material, so as to be connected to the first housing 210, provide a fixing means for the elastic member 14, and function to limit the position of the output shaft 222 of the motor 220. The elastic member 14 may be made of a soft rubber material, so as to be in interference fit with the output shaft 222 of the motor 220, thereby playing a waterproof role. The elastic member 14 and the end cap 12 may be integrally formed, so that the connection between the elastic member 14 and the end cap 12 is more firm, and the assembly of the electric toothbrush 01 is more convenient, thereby saving the assembly time of the electric toothbrush 01 and reducing the assembly cost. The second housing 240 may be rotatably coupled to the elastic member 14 when the electric toothbrush 01 is not in use. At this time, the brush head located at the end of the output shaft 222 of the motor 220 far away from the first housing 210 is located in the sealed space formed by the second housing 240 and the elastic member 14, so that dust can be prevented from being attached to the brush head. Meanwhile, after the second housing 240 is connected with the elastic member 14, water outside the electric toothbrush 01 can be prevented from entering the first housing 210 and the second housing 240, thereby achieving a dual waterproof effect.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A waterproof structure of an electric toothbrush, comprising: an end cap and an elastic member;

the end cover is connected with the elastic piece;

the end cover is provided with a first through hole, the elastic part is provided with a second through hole, the axis of the first through hole is overlapped with the axis of the second through hole, the first through hole and the second through hole are used for an output shaft of a motor of the electric toothbrush to penetrate through, the aperture of the first through hole is larger than the diameter of the output shaft, and the aperture of the second through hole is smaller than the diameter of the output shaft.

2. The waterproof structure according to claim 1, wherein said end cap and said elastic member are integrally formed.

3. The waterproof structure according to claim 1, wherein said end cap has a first screw hole for connecting a housing of the electric toothbrush.

4. The waterproof structure according to claim 3, wherein the end cap includes a fixing portion and a first connecting portion, the fixing portion and the first connecting portion being integrally formed;

the first screw hole is located the fixed part, the first through hole is located first connecting portion with the fixed part, the elastic component with first connecting portion connect.

5. The waterproof structure according to claim 4, wherein said elastic member includes a waterproof portion and a second connecting portion, said waterproof portion and said second connecting portion being integrally molded;

the second through hole is positioned in the waterproof part;

the outer surface of the first connecting portion is connected with the inner surface of the second connecting portion.

6. The waterproof structure according to any one of claims 1 to 5, wherein the material of the end cap is polycarbonate, acrylonitrile-butadiene-styrene copolymer or polystyrene or acrylonitrile-styrene copolymer;

the elastic part is made of silica gel, ethylene-vinyl acetate copolymer, ethylene-octene copolymer or styrene thermoplastic elastomer.

7. An electric toothbrush comprising a waterproof structure according to any one of claims 1 to 6.

8. The electric toothbrush of claim 7, further comprising: a first housing and a motor;

the first shell is provided with a first cavity and a first opening used for exposing the first cavity, and the waterproof structure is connected with one end of the first shell, which is provided with the first opening; the motor is located in the first cavity, and an output shaft of the motor penetrates through the first through hole and the second through hole.

9. The powered toothbrush of claim 8, wherein said end cap has a first threaded hole, said first housing end having said first opening has a second threaded hole, said powered toothbrush further comprising: a screw;

the end cover comprises a fixing part and a first connecting part, and the fixing part and the first connecting part are integrally formed; the first screw hole is positioned on the fixing part, the first through hole is positioned on the first connecting part and the fixing part, and the elastic part is connected with the first connecting part;

the screw penetrates through the first screw hole and the second screw hole to connect the end cover and the first shell.

10. The electric toothbrush of claim 9, wherein the elastic member includes a waterproof portion and a second connecting portion, the waterproof portion and the second connecting portion being integrally molded; the first through hole is positioned in the waterproof part; the outer surface of the first connecting part is connected with the inner surface of the second connecting part, and the outer surface of the second connecting part is provided with first threads;

the electric toothbrush further comprises: the second shell is provided with a second cavity and a second opening used for exposing the second cavity, and a second thread is arranged on the inner surface of one end, provided with the second opening, of the second shell and used for being connected with the first thread.

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