CN219661955U - Toothbrush - Google Patents

Abstract

The utility model provides a toothbrush, which comprises a handle, a brush holder, a pressure sensor and a rotary brush head, wherein the handle is connected with the handle, an extrusion part is arranged at the part of a first connecting part extending into a second connecting part, an induction part is arranged at the second connecting part corresponding to the extrusion part, and the pressure sensor is arranged on the induction part.

Description

Toothbrush

Technical Field

The utility model relates to the technical field of oral cleaning and nursing tools, in particular to an electric toothbrush.

Background

The electric toothbrush is divided into two major types of rotary electric toothbrushes and vibrating electric toothbrushes, wherein a vibrating motor is arranged in the vibrating electric toothbrushes, so that the brush head can generate high-frequency swing perpendicular to the direction of the brush handle, but the swing amplitude is very small, generally about 5 mm up and down respectively; compared with a vibrating electric toothbrush, the rotary electric toothbrush has simpler principle, and the motor is arranged in the brush handle to drive the round brush head to rotate so as to realize tooth oral cavity cleaning.

The rotary electric toothbrush has the effect of enhancing friction when brushing teeth, and because the rotary electric toothbrush has larger force to teeth when in use, the tooth surface is cleaned very clean, so the rotary electric toothbrush has good tooth cleaning effect, but has large abrasion to teeth, and meanwhile, the toothbrush head can clean the gums and generate larger acting force, so that the gums are damaged and bleeding.

In the prior art, the pressure sensor is arranged to monitor the acting force of the rotary brush head on teeth and/or gums to judge whether a user brushes teeth excessively, specifically, the pressure sensor is arranged inside the rotary brush head, and the rotary brush head is soaked in water when the toothbrush is used or washed, so that the design is used for preventing fruits of the pressure sensor, a complex waterproof structure is required to be arranged, the assembly difficulty is increased, and the control of the production cost is not facilitated.

Disclosure of Invention

In view of this, it is necessary to provide a toothbrush which is simple in structure and can be efficiently waterproof so as to reasonably control the production cost.

The utility model provides a toothbrush, which comprises a handle, a brush holder, a pressure sensor and a rotary brush head, wherein the rotary brush head is rotatably arranged at one end of the brush holder, a first connecting part is arranged at the other end of the brush holder, a second connecting part which is matched with the first connecting part is arranged at one end of the handle, the first connecting part at least partially stretches into the second connecting part and is connected with an extrusion part, an induction part is arranged at the second connecting part corresponding to the extrusion part, the pressure sensor is arranged on the induction part, and the pressure sensor is connected with a control circuit board.

Further, the handle includes first part, first part is the tubulose, second connecting portion also is the tubulose, second connecting portion is located in the first part, the one end of second connecting portion with the one end of first part is connected, just the lateral surface of second connecting portion at least part with the inner face interval of first part is formed with the installation space, control circuit board at least part locate in the installation space and correspond the response portion, pressure sensor sets up on the control circuit board.

Further, the handle further comprises a second portion, the second portion is detachably connected with one end, away from the second connecting portion, of the first portion, a charging circuit board and a rechargeable battery are arranged on the second portion, and the rechargeable battery is electrically connected with the charging circuit board and the control circuit board respectively.

Further, one end of the first part, which is far away from the second connecting part, is provided with a third connecting part, the second part is of a hollow structure with one end open, the charging circuit board and the rechargeable battery are arranged in the hollow structure, and the open end of the second part is provided with a fourth connecting part which is matched with the third connecting part.

Further, the handle with the brush holder is formed with the drive chamber through first connecting portion with the second connecting portion intercommunication, be equipped with drive assembly in the drive chamber, drive assembly includes drive arrangement and pivot, the one end of pivot with drive arrangement's output is connected, the other end of pivot is equipped with drive portion, drive portion with the rotation axis skew certain angle setting of pivot, rotatory brush head corresponds drive portion is equipped with the breach, drive portion locates in the breach, works as the pivot rotates, drive portion is in the rotation of breach internal rotation drive rotatory brush head reciprocating rotation.

Further, the driving assembly further comprises a limiting sleeve, and the limiting sleeve is sleeved on the rotating shaft and is close to the driving part.

Further, the driving assembly further comprises a first shaft sleeve and a second shaft sleeve, one end of the first shaft sleeve is connected with one end of the second shaft sleeve in an inserting mode, the other end of the first shaft sleeve is connected with the output end of the driving device, and the other end of the second shaft sleeve is connected with one end, away from the driving portion, of the rotating shaft.

Further, the brush holder includes first section and second section, the one end of first section is equipped with the mounting groove, rotatory brush head is located in the mounting groove, the other end of first section with the second section is kept away from the one end of first connecting portion can dismantle the connection.

Further, the first section is provided with a first liquid leakage hole corresponding to the rotary brush head, and the first liquid leakage hole is communicated with the mounting groove and the outside.

Further, the second section is provided with a second liquid leakage hole, and the driving cavity is communicated with the outside through the second liquid leakage hole.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the brush handle and the handle are detachably connected, the extrusion part is arranged at the part of the first connecting part extending into the second connecting part, the sensing part is arranged at the part of the second connecting part corresponding to the extrusion part, and the pressure sensor is arranged on the sensing part, when a user uses the toothbrush, the rotary brush head receives extrusion acting force and acts on the sensing part of the handle in an extrusion manner through the extrusion part of the brush handle, the sensing part correspondingly deforms so that the pressure sensor generates a corresponding pressure value, and the pressure sensor is prevented from being easily soaked by liquid due to the fact that the pressure sensor is arranged at the rotary brush head, so that a more complex waterproof structure is required to be arranged for realizing waterproof and electric connection of the pressure sensor, and further, the assembly process is more complex and the production cost is higher.

Drawings

Fig. 1 is an overall schematic of an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of the present usage information type embodiment.

Fig. 3 is another angular cross-sectional view of an embodiment of the present utility model.

FIG. 4 is a schematic view of an embodiment of a rotary brush head according to the present utility model.

Fig. 5 is a schematic view of a first embodiment of the handle of the present utility model.

Fig. 6 is an exploded view of the second portion of the handle and the charging plug of the present utility model.

Fig. 7 is a schematic view of the connection of the second portion of the handle to the charging plug of the present utility model.

Reference numerals illustrate:

100. a toothbrush; 10. a handle; 11. a first portion; 12. a second portion; 121. a charging circuit board; 122. a rechargeable battery; 13. a second connecting portion; 131. a second clamping part; 132. a positioning groove; 14. an induction unit; 16. a support point; 17. a third connecting portion; 18. a fourth connecting portion; 20. a brush handle; 21. a first connection portion; 211. a connecting groove; 212. a first clamping part; 213. positioning the bulge; 22. an extrusion part; 23. a mounting groove; 231. a limit column; 232. limit guide grooves; 24. a first section; 241. limiting through holes; 242. a guide groove; 243. a first weeping hole; 25. a second section; 251. a limit protrusion; 252. a guide part; 253. a second weeping hole; 40. a control circuit board; 51. a driving device; 52. a rotating shaft; 521. a driving section; 53. a limit sleeve; 54. a first sleeve; 55. a second sleeve; 60. rotating the brush head; 61. a connection end; 611. a relief hole; 612. a notch; 613. a limit guide protrusion; 62. bristle ends; 70. a seal ring; 80. a drive chamber; 90. a bracket; 200. a charging plug; 210. a connection site; 220. a charging main body; 230. a plug.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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 fall within the scope of the utility model. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. The connection relationships shown in the drawings are for convenience of clarity of description only and are not limiting on the manner of connection.

It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or intervening components may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless otherwise specifically defined and limited; either mechanically or electrically, or by communication between two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

It should also be noted that, in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1-5, the present utility model provides a toothbrush 100, wherein the toothbrush 100 includes a handle 10, a handle 20, a pressure sensor (not shown), a control circuit board 40, a driving assembly and a rotary brush head 60, the rotary brush head 60 is rotatably disposed at one end of the handle 20, the other end of the handle 20 is connected with one end of the handle 10, and the pressure sensor is disposed at the connection between the handle 20 and the handle 10 for sensing the acting force of the rotary brush head 60 transmitted to the handle 10 through the handle 20.

When the force sensed by the pressure sensor is greater than a preset value, the control circuit board 40 controls the driving assembly not to drive the rotary brush head 60 any more or reduce the frequency of the reciprocating rotation of the rotary brush head 60, so as to protect the gums, teeth and the like in the oral cavity of the user, and avoid bleeding gums and excessively rapid tooth wear caused by excessive force during brushing.

Meanwhile, the pressure sensor is arranged at the joint of the handle 10 and the brush handle 20, so that the pressure sensor is prevented from being arranged at the back side of the rotary brush head 60, and a corresponding waterproof structure is required to be designed for waterproof protection and protection of a connecting circuit, so that the structure of the toothbrush 100 is simpler, the production cost is controlled, and the production efficiency is improved.

Further, a first connecting portion 21 is disposed at the other end of the brush holder 20, a second connecting portion 13 adapted to the first connecting portion 21 is disposed at one end of the handle 10, the first connecting portion 21 at least partially extends into the second connecting portion 13 and is connected with an extruding portion 22, an induction portion 14 is disposed at the second connecting portion 13 corresponding to the extruding portion 22, a pressure sensor is disposed on the induction portion 14, and the pressure sensor is connected with the control circuit board 40.

The handle 10 and the brush holder 20 are detachably connected through the second connecting part 13 and the first connecting part 21, so that the assembly efficiency of the handle 10 and the brush holder 20 is improved.

In one embodiment, the first connecting portion 21 is in a circular tubular shape, at least one annular connecting groove 211 is provided on the outer side surface of the first connecting portion 21, and a sealing ring 70 is provided in the connecting groove 211, so that when the handle 10 is connected with the brush holder 20, sealing and waterproofing can be achieved through the sealing ring 70, and external liquid is prevented from entering the toothbrush 100.

Further, a first clamping portion 212 is further disposed at an end of the first connecting portion 21 away from the rotary brush head 60, a second clamping portion 131 adapted to the first clamping portion 212 is disposed at the second connecting portion 13, and the first clamping portion 212 and the second clamping portion 131 are clamped to enable the handle 10 to be connected with the brush handle 20.

The first clamping portion 212 may be a clamping protrusion, and the second clamping portion 131 is an adaptive clamping groove. Preferably, the clamping protrusion is an annular protrusion, and the clamping groove is an annular groove.

Further, the first connecting portion 21 or the second connecting portion 13 is further provided with a positioning groove 132, and the second connecting portion 13 or the first connecting portion 21 is provided with an adaptive positioning protrusion 213 corresponding to the positioning groove 132, so that the handle 10 and the brush holder 20 are connected according to a specified position.

In another embodiment, the first connecting portion 21 may also be a square or other tubular structure, the second connecting portion 13 is a structure adapted to the first connecting portion 21, and at least one sealing ring 70 is also disposed between the first connecting portion 21 and the second connecting portion 13 to achieve sealing.

Preferably, two sealing rings 70 are provided between the first connecting portion 21 and the second connecting portion 13.

The first clamping portion 212 may be a clamping protrusion, and the second clamping portion 131 is an adaptive clamping groove. Preferably, the clamping protrusion is an annular protrusion, and the clamping groove is an annular groove.

Further, the first connecting portion 21 or the second connecting portion 13 is further provided with a positioning groove 132, and the second connecting portion 13 or the first connecting portion 21 is provided with an adaptive positioning protrusion 213 corresponding to the positioning groove 132, so that the handle 10 and the brush holder 20 are connected according to a specified position.

Further, the handle 10 includes a first portion 11, the first portion 11 is tubular, the second connecting portion 13 is also tubular, and the second connecting portion 13 is located in the first portion 11.

Wherein, one end of the second connecting portion 13 is connected with one end of the first portion 11, an installation space is formed between at least a portion of an outer side surface of the second connecting portion 13 and an inner surface of the first portion 11 at a certain distance, the control circuit board 40 is at least partially disposed in the installation space and corresponds to the sensing portion 14, and the pressure sensor is disposed on the control circuit board 40.

By arranging the outer side of the second connecting portion 13 at least partially at a certain distance from the inner surface of the first connecting portion 21 to form the installation space, not only the pressure sensor and a part of the control circuit board 40 can be stored, but also a free end can be formed by separating the second connecting portion 13 from one end of the first portion 11, so that the acting force transferred from the brush handle 20 to the rotating brush head 60 can be transferred to the pressure sensor through the sensing portion 14 more sensitively.

Preferably, the first portion 11 is circular tubular or oval tubular to facilitate the user's grip of the toothbrush 100.

In one embodiment, the sensing portion 14 is a spring, where one end of the spring is fixedly connected to the second connecting portion 13, and the other end of the spring is a free end and corresponds to the pressure sensor.

Preferably, the elastic piece and the second connecting portion 13 are integrally formed.

Further, the handle 10 and the brush holder 20 are communicated with the second connecting portion 13 through the first connecting portion 21 to form a driving cavity 80, and the driving assembly is disposed in the driving cavity 80.

In one embodiment, the driving assembly includes a driving device 51 and a rotating shaft 52, one end of the rotating shaft 52 is connected to an output end of the driving device 51, a driving portion 521 is disposed at the other end of the rotating shaft 52, the driving portion 521 is disposed at a certain angle away from a rotation axis 52 line of the rotating shaft 52, the rotating brush head 60 is provided with a notch 612 corresponding to the driving portion 521, the driving portion 521 is disposed in the notch 612, and when the rotating shaft 52 rotates, the driving portion 521 rotationally drives the rotating brush head 60 to reciprocally rotate in the notch 612.

In one embodiment, the brush holder 20 is of an integral structure, one end of the brush holder 20 is provided with a mounting groove 23, the mounting groove 23 is used for mounting the rotary brush head 60, and the other end of the brush holder 20 is provided with the first connecting portion 21.

In another embodiment, the brush holder 20 includes a first section 24 and a second section 25, one end of the first section 24 is provided with a mounting groove 23, the rotating brush head 60 is disposed in the mounting groove 23, and the other end of the first section 24 is detachably connected to the end of the second section 25 away from the first connecting portion 21.

Further, the end of the first section 24 away from the mounting groove 23 is hollow and is in communication with the mounting groove 23, so that the driving portion 521 of the rotating shaft 52 extends into the mounting groove 23 and is connected with the rotating brush head 60.

In one embodiment, one end of the first section 24 away from the mounting groove 23 is sleeved on the second section 25, where a limiting through hole 241 is provided on the first section 24, and a limiting protrusion 251 adapted to the limiting through hole 241 is provided on the second section 25, and further, the limiting through hole 241 may also be a limiting blind hole.

Further, in one embodiment, at least one guiding groove 242 is further provided at the sleeving area of the first section 24 and the second section 25, and the guiding groove 242 is correspondingly provided with a guiding portion 252 corresponding to the second section 25.

Preferably, the first section 24 is provided with two guiding grooves 242, and the second section 25 is provided with one guiding part 252 corresponding to one guiding groove 242.

In another embodiment, the yielding groove may also be disposed on the second section 25, and the guiding groove 242 is adaptively disposed on the first section 24.

Further, a limiting post 231 is further disposed in the mounting groove 23, the limiting post 231 is perpendicular to the bottom of the mounting groove 23 and is disposed at the center of the mounting groove 23, the rotary brush head 60 includes a connection end 61 and a bristle end 62, the connection end 61 and the bristle end 62 are disposed opposite to each other, and an adaptive abdication hole 611 is disposed at the connection end 61 corresponding to the limiting post 231; the notch 612 is disposed at the connection end 61.

Further, the connecting end 61 is substantially cylindrical, at least one limit guiding protrusion 613 or limit guiding groove 232 is provided on an outer side surface of the connecting end 61, and an adaptive limit guiding groove 232 is provided on an inner side surface of the mounting groove 23 corresponding to the limit guiding protrusion 613 or an adaptive limit guiding protrusion 613 is provided corresponding to the limit guiding groove 232.

Preferably, two sets of the limit guide protruding parts 613 and the limit guide grooves 232 are respectively arranged corresponding to each other and are arranged opposite to each other.

Specifically, when the driving device 51 drives the spindle 52 to rotate, the driving portion 521 rotates synchronously with the rotation axis 52 of the spindle 52, and since the driving portion 521 is offset from the rotation axis 52 of the spindle 52 by a certain angle, the driving portion 521 will reciprocate on two acting surfaces opposite to the notch 612 when rotating, so that the rotating brush head 60 reciprocates with the limit post 231 as a rotation center under the action of the limit guide protrusion 613, the limit guide groove 232, and the limit post 231.

Further, the driving assembly further includes a stop collar 53, and the stop collar 53 is sleeved on the rotating shaft 52 and is close to the driving portion 521. The stop collar 53 can make the rotation of the shaft 52 more stable and prevent the shaft 52 from swinging in the radial direction.

Further, the driving assembly further includes a first shaft sleeve 54 and a second shaft sleeve 55, one end of the first shaft sleeve 54 is inserted into one end of the second shaft sleeve 55, the other end of the first shaft sleeve 54 is connected with the output end of the driving device 51, and the other end of the second shaft sleeve 55 is connected with one end of the rotating shaft 52 away from the driving portion 521.

In one embodiment, one end of the first shaft sleeve 54 is rotatably abutted in the second section 25, and the second shaft sleeve 55 is inserted into the first shaft sleeve 54 and rotates together with the first shaft sleeve 54 under the action of the driving device 51 to drive the rotating shaft 52 to rotate.

Further, the driving device 51 is disposed in the driving cavity 80 and corresponds to the portion of the handle 10, the first shaft sleeve 54 and the second shaft sleeve 55 are disposed in the driving cavity 80 and correspond to the portion of the handle 20, and are detachably connected to the second shaft sleeve 55 through the first shaft sleeve 54, so that when the handle 10 is detached from the handle 20, the driving device 51 and the rotating shaft 52 can be separated through the first shaft sleeve 54 and the second shaft sleeve 55.

Further, the first section 24 is provided with a first liquid leakage hole 243 corresponding to the rotary brush head 60, and the first liquid leakage hole 243 communicates the mounting groove 23 with the outside, so that the liquid entering the first section 24 during use can flow out through the first liquid leakage hole 243.

Further, the second section 25 is provided with a second liquid leakage hole 253, and the second liquid leakage hole 253 communicates the driving cavity 80 with the outside, so that the liquid entering the second section 25 can flow out through the second liquid leakage hole 253 during the use process of the user.

Further, the handle 10 is provided with two supporting points 16 corresponding to the connecting end 61, and when the toothbrush 100 is not in use, the toothbrush 100 can be supported by the two supporting points 16, so that the bristle surface of the toothbrush 100 faces upwards, thereby facilitating the smooth outflow of the liquid in the mounting groove 23 or the driving cavity 80.

Further, the first portion 11 is further provided with a bracket 90, and the control circuit board 40 and the driving device 51 are both disposed on the bracket 90.

Further, the handle 10 further includes a second portion 12, the second portion 12 is detachably connected to an end of the first portion 11 away from the second connecting portion 13, the second portion 12 is provided with a charging circuit board 121 and a rechargeable battery 122, and the rechargeable battery 122 is electrically connected to the charging circuit board 121 and the control circuit board 40 respectively.

Further, a third connecting portion 17 is disposed at an end of the first portion 11 away from the second connecting portion 13, the second portion 12 is a hollow structure with an opening at one end, the charging circuit board 121 and the rechargeable battery 122 are disposed in the hollow structure, and a fourth connecting portion 18 adapted to the third connecting portion 17 is disposed at an opening end of the second portion 12.

In one embodiment, the third connecting portion 17 is an internal thread, and the fourth connecting portion 18 is an external thread that is adapted to the internal thread, so that the first portion 11 and the second portion 12 are screwed together.

By detachably connecting the first part 11 and the second part 12, the second part 12 is easily detached and charged directly.

Referring to fig. 6-7, preferably, the toothbrush 100 is further provided with a charging plug 200, the charging plug 200 includes a connection position 210, a charging main body 220, and a plug 230, the connection position 210 is used for connecting with the fourth connection portion 18 and connecting the charging circuit board 121 with the charging main body 220, and the plug 230 is used for connecting with a power supply to charge the rechargeable battery 122.

In the description and claims of the present utility model, the words "comprise/comprising" and the words "have/include" and variations thereof are used to specify the presence of stated features, values, steps, or components, but do not preclude the presence or addition of one or more other features, values, steps, components, or groups thereof.

Some features of the utility model, which are, for clarity of illustration, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, some features of the utility model, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination in different embodiments.

The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The utility model provides a toothbrush, its characterized in that includes handle, brush holder, pressure sensor and rotatory brush head, rotatory brush head rotationally locates the one end of brush holder, the other end of brush holder is equipped with first connecting portion, the one end of handle corresponds first connecting portion are equipped with the second connecting portion of looks adaptation, first connecting portion at least partially stretches into second connecting portion and be connected with extrusion portion, second connecting portion corresponds extrusion portion is equipped with sensing portion, pressure sensor locates on the sensing portion, just pressure sensor is connected with control circuit board.

2. The toothbrush according to claim 1, wherein the handle comprises a first portion, the first portion is tubular, the second connecting portion is also tubular, the second connecting portion is located in the first portion, one end of the second connecting portion is connected with one end of the first portion, an installation space is formed at least partially between an outer side surface of the second connecting portion and an inner surface of the first portion, the control circuit board is at least partially located in the installation space and corresponds to the sensing portion, and the pressure sensor is arranged on the control circuit board.

3. The toothbrush according to claim 2 wherein the handle further comprises a second portion detachably connected to an end of the first portion remote from the second connection portion, the second portion being provided with a charging circuit board and a rechargeable battery electrically connected to the charging circuit board and the control circuit board, respectively.

4. A toothbrush according to claim 3 characterised in that the end of the first part remote from the second connection part is provided with a third connection part, the second part is of hollow structure with one open end, the charging circuit board and the rechargeable battery are arranged in the hollow structure, and the open end of the second part is provided with a fourth connection part which is adapted to the third connection part.

5. The toothbrush according to claim 1, wherein the handle and the brush holder are communicated with each other through the first connecting portion and the second connecting portion to form a driving cavity, a driving assembly is arranged in the driving cavity, the driving assembly comprises a driving device and a rotating shaft, one end of the rotating shaft is connected with an output end of the driving device, a driving portion is arranged at the other end of the rotating shaft, the driving portion and a rotating axis of the rotating shaft are arranged in a deviated manner, a notch is formed in the rotating brush head corresponding to the driving portion, the driving portion is arranged in the notch, and when the rotating shaft rotates, the driving portion rotates in the notch to drive the rotating brush head to rotate reciprocally.

6. The toothbrush of claim 5, wherein the drive assembly further comprises a stop collar disposed about the shaft and adjacent the drive portion.

7. The toothbrush according to claim 5 or 6 wherein the drive assembly further comprises a first sleeve and a second sleeve, one end of the first sleeve being plugged into one end of the second sleeve, the other end of the first sleeve being connected to the output of the drive means, the other end of the second sleeve being connected to the end of the shaft remote from the drive portion.

8. The toothbrush of claim 5, wherein the handle comprises a first section and a second section, wherein one end of the first section is provided with a mounting groove, the rotary head is disposed in the mounting groove, and the other end of the first section is detachably connected to one end of the second section remote from the first connecting portion.

9. The toothbrush of claim 8, wherein the first section is provided with a first fluid-leakage aperture corresponding to the rotary head, the first fluid-leakage aperture communicating the mounting slot with the outside.

10. The toothbrush of claim 8, wherein the second section is provided with a second weeping hole, the second weeping hole connecting the drive cavity to the outside.