CN210183105U - Stator module, sound wave motor and sound wave electric toothbrush - Google Patents

Abstract

The utility model belongs to the technical field of the motor technique and specifically relates to a stator module, sound wave motor and sound wave electric toothbrush are related to. The stator assembly comprises an iron core and a coil, wherein the iron core comprises a first limiting part, a second limiting part and a connecting part; the first limiting part and the second limiting part are oppositely arranged at two ends of the connecting part, and the coil is wound on the connecting part; the terminal surface of one side of first spacing portion and the spacing portion of second towards connecting portion is the plane, makes the two can not shelter from connecting portion to can replace the manual work through the machine, realize the automatic wire winding of machine, make more regular of coil arrangement on the iron core, increase the number of turns of the coil of establishing on the iron core, thereby when the coil circular telegram, can produce stronger magnetic field force on the iron core. The acoustic wave motor comprises the stator assembly, and magnetic field force generated by the stator assembly acts on the rotor assembly to enable the rotor assembly to have larger torque. The sonic electric toothbrush includes the sonic motor to provide a toothbrush head with greater oscillating strength.

Description

Stator module, sound wave motor and sound wave electric toothbrush

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to a stator module, sound wave motor and sound wave electric toothbrush are related to.

Background

The sound wave toothbrush generally provides power for the sound wave toothbrush through a sound wave motor, but the iron core used for winding the coil in the sound wave motor can only be wound manually because the shape of the iron core can not be automatically wound through a machine, so that the labor intensity of operators is aggravated, meanwhile, due to manual winding, the coil is arranged irregularly, the number of turns which can be wound on the iron core is relatively reduced, and further when the coil is electrified, the generated magnetic field force is reduced, the torsion of the iron core acting on a motor rotor can also be reduced, and the swing intensity of the brush head is reduced.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a stator module to realize that the accessible machine winds the iron core is automatic, reduce operating personnel's intensity of labour, and increase to a certain extent around locating the coil number of turns on the iron core, strengthen the magnetic field force that produces when it switches on.

A second object of the present invention is to provide an acoustic wave motor to improve the torque of the motor rotor to a certain extent.

A third object of the present invention is to provide an electric toothbrush with sound wave to improve the swing strength of the toothbrush head to a certain extent.

The utility model provides a stator assembly, which comprises an iron core and a coil; the iron core comprises a first limiting part, a second limiting part and a connecting part; one end of the connecting part is connected with the first limiting part, and the other end of the connecting part is connected with the second limiting part; the end surfaces of the first limiting part and the second limiting part, which face to one side of the connecting part, are both planes; the coil is wound around the connecting portion.

The utility model also provides an acoustic wave motor, which comprises the stator assembly and the rotor assembly; a magnetic part is arranged in the rotor assembly, and the stator assembly is positioned on the outer side of the rotor assembly; the stator component interacts with the magnetic component to drive the rotor component to rotate.

Further, the motor also comprises a stator bracket; the stator support is provided with a through hole along the length direction, the rotor assembly penetrates through the through hole, and the magnetic part is positioned in the stator support; the first limiting portion of the iron core faces the rotor assembly, and the first limiting portion is connected with the stator support.

Further, the rotor assembly comprises a rotor bracket for fixing the magnetic member; the number of the magnetic parts is two, and the two magnetic parts are oppositely arranged in the rotor bracket; the number of the stator assemblies is two, one stator assembly is opposite to one magnetic piece, and the other stator assembly is opposite to the other magnetic piece.

Furthermore, two strip-shaped grooves are formed in the rotor support at intervals, and the two magnetic pieces are correspondingly embedded into the strip-shaped grooves.

Further, the two magnetic parts and the rotor bracket are integrally injection-molded; the magnetic part is a magnet or an electromagnet.

Further, the device also comprises a shell and a rear end cover; the rear end cover is positioned at one end of the shell and is connected with the shell; the stator assembly and the rotor assembly are both positioned in the shell, and one end of the rotor assembly is rotationally connected with the rear end cover; the other end of the rotor component is connected with a transmission shaft, and the transmission shaft penetrates out of the machine shell and is rotatably connected with the front end cover of the machine shell.

Furthermore, an arc-shaped groove is formed in the center of the end face, facing one side of the rotor assembly, of the first limiting portion.

The utility model also provides a sound wave motor, which comprises an iron core, a coil and a stator bracket; the iron core comprises a first limiting part, a second limiting part and a connecting part for winding the coil; one end of the connecting part is connected with the first limiting part, and the other end of the connecting part is connected with the second limiting part; a clamping hole is formed in the side wall of the stator support, and the first limiting part can be clamped in the clamping hole; a winding space is formed between the side wall of the stator support and the second limiting part, and the side wall of the stator support and the end face, facing the winding space, of the second limiting part are both planes.

The utility model also provides an electric toothbrush of sound wave, including above-mentioned arbitrary sound wave motor.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a stator module which comprises an iron core, wherein the iron core comprises a first limiting part, a second limiting part and a connecting part; the first limiting part and the second limiting part are oppositely arranged at two ends of the connecting part, and the coil made of metal materials is wound on the connecting part; the end faces of one sides, facing the connecting part, of the first limiting part and the second limiting part are both planes, so that the connecting part cannot be shielded by any one of the first limiting part and the second limiting part, and therefore, the machine can replace manpower to realize automatic winding of the machine; through the machine wire winding, the number of turns of winding coil on can the accurate control iron core, also make more regular that the coil was arranged simultaneously, the accommodation space between the first spacing portion of make full use of and the spacing portion of second increases the number of turns of coil on every iron core to when the coil circular telegram, can produce stronger magnetic field force on the iron core.

The application still provides an acoustic wave motor, including the stator module and the rotor subassembly of above-mentioned scheme, can know based on above-mentioned analysis, stator module sets up in the outside of rotor subassembly, through the stronger magnetic field force that this stator module can produce to act on the rotor subassembly, thereby improve the moment of torsion of rotor subassembly.

The application also provides an electric toothbrush with sound waves, which comprises the sound wave motor in the scheme, and based on the analysis, the toothbrush head is connected to the transmission shaft of the sound wave motor, and when the sound wave motor is electrified, the toothbrush head can have larger swing strength.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a stator assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an iron core according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an acoustic wave motor according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a stator bracket of an acoustic wave motor according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an acoustic wave motor according to another embodiment of the present invention.

Reference numerals:

1-iron core, 11-first limit part, 12-second limit part, 13-connecting part, 2-coil, 3-stator support, 31-through hole, 32-clamping hole, 4-rotor component, 41-magnetic part, 42-rotor support, 5-machine shell, 6-transmission shaft, 7-bearing and 8-rear end cover.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that 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, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A stator assembly, a sonic motor, and a sonic electric toothbrush according to some embodiments of the present application are described below with reference to fig. 1-6.

Example one

The present application provides a stator assembly, as shown in fig. 1 and 2, including a core 1 and a coil 2; the iron core 1 comprises a first limiting part 11, a second limiting part 12 and a connecting part 13; one end of the connecting part 13 is connected with the first limiting part 11, and the other end is connected with the second limiting part 12; the end surfaces of the first limiting part 11 and the second limiting part 12 facing one side of the connecting part 13 are both planes; the connection portion 13 is used for winding the coil 2.

The stator assembly provided by the embodiment comprises an iron core 1, wherein the iron core 1 comprises a first limiting part 11, a second limiting part 12 and a connecting part 13; the first limiting part 11 and the second limiting part 12 are oppositely arranged, and an accommodating space is formed between the first limiting part 11 and the second limiting part 12; the connecting portion 13 is located between the first limiting portion 11 and the second limiting portion 12, one end of the connecting portion 13 is connected to the first limiting portion 11, and the other end of the connecting portion 13 is connected to the second limiting portion 12. Specifically, the connecting portion 13 is connected to the first position-limiting portion 11 at a position located at a center line of the first position-limiting portion 11, and the connecting portion 13 is connected to the second position-limiting portion 12 at a position located at a center line of the second position-limiting portion 12, so that the cross section of the iron core 1 is i-shaped.

The coil 2 made of metal materials is wound on the connecting part 13, and the coil 2 is limited in the containing space formed by the first limiting part 11 and the second limiting part 12 to fix the coil 2 and prevent the coil from falling off; the end surface of the first limiting part 11 facing one side of the accommodating space is a plane, and the end surface of the second limiting part 12 facing one side of the accommodating space is also a plane; for the iron core among the prior art, because its first spacing portion 11 and the spacing portion 12 of second are curved structure, one in first spacing portion 11 and the spacing portion 12 of second can shelter from the part of connecting portion 13 to have certain hindrance to the winding process of coil 2, also because its structure, can only be via artifical wire winding, can't adopt the machine wire winding. In the application, the end surfaces of the first limiting part 11 and the second limiting part 12 facing one side of the accommodating space are designed to be planes, so that the first limiting part 11 and the second limiting part 12 can limit the coil 2 to prevent the coil from falling off, and any one of the first limiting part 11 and the second limiting part 12 can not shield the connecting part 13, so that the machine can replace manual work to realize automatic winding of the machine; through the machine wire winding, can the accurate control coil 2's of winding on the iron core 1 number of turns, also make the more regular that coil 2 arranged simultaneously, the accommodation space between the first spacing portion 11 of make full use of and the spacing portion 12 of second increases the number of turns of coil 2 on every iron core 1 to when coil 2 circular telegram, can produce stronger magnetic field force on the iron core 1.

Example two

The application also provides an acoustic wave motor, which comprises the stator assembly and the rotor assembly 4. Based on the above analysis, it can be seen that the acoustic wave motor can generate stronger magnetic force by arranging the stator assembly outside the rotor assembly 4, and act on the rotor assembly 4, thereby increasing the torque of the rotor assembly 4.

The acoustic wave motor of the present embodiment, as shown in fig. 3 to 4, includes the stator assembly and the rotor assembly 4 of the above-described embodiment; a magnetic member 41 is provided in the rotor assembly 4; the stator assembly is located outside the rotor assembly 4; the stator assembly interacts with the magnetic member 41 to drive the rotor assembly 4 in rotation.

The sound wave motor of this embodiment includes stator module and rotor subassembly 4, is provided with magnetic part 41 in the rotor subassembly 4, and stator module is located the outside of rotor subassembly 4, when the coil 2 circular telegram of stator subassembly, can make stator module form magnetic field force, and the magnetic field force that stator module formed can interact with the magnetic field of magnetic part 41 of rotor subassembly 4 to drive rotor subassembly 4 and rotate.

The acoustic wave motor of the present embodiment has a portion provided with the magnetic member 41 as a rotor, and a portion provided with the iron core 1 and the coil 2 as a stator; compared with the structure that the coil 2 and the iron core 1 are partially used as a rotor and the magnetic part 41 is used as a stator, a commutator and an electric brush are not required to be arranged on the rotor assembly 4 and the stator assembly, so that the structure of the acoustic wave motor is simpler and more compact; meanwhile, the acoustic wave motor of the present application adopts the iron core 1 of the above embodiment, and the end surfaces of the first limiting portion 11 and the second limiting portion 12 of the iron core 1 facing one side of the accommodating space are both designed as planes, so that a machine can replace a manual work to automatically wind wires; thereby saving labor cost to a certain extent; and, through the machine wire winding, not only can accurate control twine the number of turns of coil 2 on iron core 1, also make more regular that coil 2 arranged, make the accommodation space between first spacing portion 11 and the spacing portion 12 of second obtain more make full use of, can twine the coil 2 of more numbers of turns on every iron core 1 to when coil 2 circular telegram, can produce stronger magnetic field force on the iron core 1, interact with the magnetic field of magnetic part 41, increase rotor subassembly 4's moment of torsion.

In one embodiment of the present application, preferably, as shown in fig. 3 and 4, the rotor assembly 4 includes a rotor holder 42, the rotor holder 42 being used to fix the magnetic member 41; the number of the magnetic members 41 is two, and the two magnetic members 41 are oppositely arranged in the rotor bracket 42;

the number of stator assemblies is two, and one stator assembly sets up with one of them magnetism spare 41 relatively, and another stator assembly sets up with another magnetism spare 41 relatively correspondingly.

In this embodiment, the rotor assembly 4 further includes a rotor bracket 42, the magnetic members 41 are fixed by the rotor bracket 42, the number of the magnetic members 41 is two, and the two magnetic members 41 are disposed oppositely. The number of the stator assemblies is also two, and when the two stator assemblies are installed on the outer side of the rotor assembly 4, one stator assembly is arranged opposite to one magnetic piece 41, and the other stator assembly is arranged opposite to the other magnetic piece 41; therefore, when the coils 2 of the stator assembly are energized, the magnetic force generated by the iron core 1 can sufficiently act on the magnetic member 41, and interact with the magnetic field of the magnetic member 41 to rotate the rotor assembly 4, and has a large torque.

In the present embodiment, preferably, as shown in fig. 3 to 5, the acoustic wave motor further includes a stator frame 3; the stator bracket 3 is provided with a through hole 31 along the length direction, the rotor assembly 4 passes through the through hole 31, and the magnetic part 41 is positioned in the through hole 31; the first position-limiting part 11 of the iron core 1 faces the rotor assembly 4, and the first position-limiting part 11 is connected with the stator bracket 3.

In this embodiment, the acoustic wave motor further includes a stator frame 3, the stator frame 3 is opened with a through hole 31 along a length direction thereof, the rotor assembly 4 passes through the stator frame 3 through the through hole 31, and a portion of the rotor assembly 4 provided with the magnetic member 41 is located inside the stator frame 3.

The side walls of the two opposite sides of the stator support 3 are also provided with clamping holes 32, and when the stator support 3 is assembled on the outer side of the rotor assembly 4, the positions of the clamping holes 32 just face the positions of the magnetic parts 41 in the rotor support 42.

Two iron core 1 set up in the both sides of magnetic part 41 relatively, and two iron core 1 all are that first spacing portion 11 is located one side towards magnetic part 41, the spacing portion 12 of second is located the one side of keeping away from magnetic part 41, the first spacing portion 11 homoenergetic of two iron core 1 can stretch into corresponding joint hole 32, and with stator support 3 looks joint, thereby install iron core 1 location on stator support 3, and make iron core 1 can correspond accurately and set up in the both sides of magnetic part 41, two magnetic part 41 are towards two iron cores 1 respectively, with the interact power between improvement stator module and rotor subassembly 4, increase the moment of torsion.

In this embodiment, preferably, as shown in fig. 3 and 4, two strip-shaped grooves are provided on the rotor bracket 42 at intervals, and the two magnetic members 41 are correspondingly embedded in the strip-shaped grooves.

In this embodiment, two strip-shaped grooves are disposed on the rotor bracket 42 at intervals, and the two magnetic members 41 can be respectively embedded into the corresponding strip-shaped grooves, so that the magnetic members 41 are fixedly disposed in the strip-shaped grooves; so as to control the installation position of the magnetic member 41 and the relative position of the magnetic member 41 and the iron core 1, thereby improving the interaction force between the stator assembly and the rotor assembly 4 and increasing the torque.

In the present embodiment, preferably, as shown in fig. 3 and 4, the two magnetic members 41 and the rotor bracket 42 are integrally injection-molded; the magnetic member 41 is a magnet or an electromagnet.

In this embodiment, the magnetic member 41 is a magnet or an electromagnet, and has magnetism, and can drive the rotor assembly 4 to rotate under the driving of the magnetic field force of the stator assembly. The two magnetic parts 41 and the rotor bracket 42 are integrally formed by injection molding, and the magnetic parts 41 are wrapped inside the rotor bracket 42 by integral injection molding, so that the connection between the two magnetic parts is firmer and more reliable; therefore, the position of the magnetic part 41 is accurately controlled, when the rotor bracket 42 is installed in the stator bracket 3, the relative position of the magnetic part 41 and the iron core 1 can also be accurately controlled, the interaction force between the stator assembly and the rotor assembly 4 is improved, and the torque is increased.

In the present embodiment, preferably, as shown in fig. 3 and 4, the acoustic wave motor further includes a housing 5 and a rear end cover 8; the rear end cover 8 is positioned at one end of the shell 5 and is connected with the shell 5; the stator assembly and the rotor assembly 4 are both positioned in the machine shell 5, and one end of the rotor assembly 4 is rotatably connected with the rear end cover 8; the other end of the rotor assembly 4 is connected with a transmission shaft 6, and the transmission shaft 6 penetrates out of the machine shell 5 and is rotatably connected with a front end cover of the machine shell 5.

In this embodiment, the acoustic motor further comprises a housing 5 and a rear end cap 8, the stator assembly and the rotor assembly 4 both being located within the housing 5; the rear end cover 8 is positioned at one end of the length direction of the shell 5 and is connected with the shell 5; one end of the rotor bracket 42 in the length direction faces the rear end cover 8 and is rotatably connected with the rear end cover 8 through a bearing 7; the other end of the rotor bracket 42 in the length direction is connected with a transmission shaft 6, and the transmission shaft 6 penetrates through the machine shell 5 and is rotatably connected with the machine shell 5 through a bearing 7; so that when the coils 2 on the stator assembly are energized, the magnetic force of the stator assembly interacts with the magnetic force of the magnetic member 41 to cause the rotor assembly 4 and the drive shaft 6 to rotate together.

In the present embodiment, preferably, as shown in fig. 4, an arc-shaped groove is opened at the center of the end surface of the first position-limiting portion 11 facing one side of the rotor assembly 4.

In this embodiment, the first position-limiting portion 11 of the core 1 is located on a side close to the rotor assembly 4, an arc-shaped groove is formed on an end surface of the first position-limiting portion 11 facing the rotor assembly 4, and the arc-shaped groove is located at a position facing the center of the connecting portion 13, so as to distinguish the N/S magnetic circuits to some extent.

EXAMPLE III

The application also provides an acoustic wave motor, as shown in fig. 6, comprising an iron core 1, a coil 2 and a stator support 3; the iron core 1 comprises a first limiting part 11, a second limiting part 12 and a connecting part 13 for winding the coil 2; one end of the connecting part 13 is connected with the first limiting part 11, and the other end of the connecting part 13 is connected with the second limiting part 12; a clamping hole 32 is formed in the side wall of the stator bracket 3, and the first limiting part 11 can be clamped in the clamping hole 32; a winding space is formed between the side wall of the stator support 3 and the second limiting part 12, and the side wall of the stator support 3 and the end surface of the second limiting part 12 facing the winding space are both planes;

therefore, when the coil 2 is wound on the connecting part 13, the machine can replace manual work, and automatic winding of the machine is realized; through the machine wire winding, can the accurate control coil 2's of winding on the iron core 1 number of turns, also make more regular that coil 2 arranged simultaneously, make full use of wire winding space increases the number of turns of coil 2 on every iron core 1 to when coil 2 circular telegram, can produce stronger magnetic field force on the iron core 1.

Example four

The application also provides an electric toothbrush with sound waves, which comprises the sound wave motor in any one of the above embodiments, so that the electric toothbrush with sound waves has all the beneficial effects of the sound wave motor, and the sound wave motor is not repeated herein. The brush head of the sound wave electric toothbrush is connected to a transmission shaft 6 of the sound wave motor, when the sound wave motor is powered on, under the combined action of the stator assembly and the rotor assembly 4, the rotor assembly 4 rotates and drives the brush head to rotate along with the sound wave motor, the torque of the rotor assembly 4 can be improved through the sound wave motor, and therefore the brush head of the sound wave electric toothbrush has larger swing strength.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A stator assembly comprising a core and a coil;

the iron core comprises a first limiting part, a second limiting part and a connecting part;

one end of the connecting part is connected with the first limiting part, and the other end of the connecting part is connected with the second limiting part; the end surfaces of the first limiting part and the second limiting part, which face to one side of the connecting part, are both planes;

the coil is wound around the connecting portion.

2. An acoustic wave motor comprising a stator assembly and a rotor assembly as recited in claim 1;

a magnetic part is arranged in the rotor assembly, and the stator assembly is positioned on the outer side of the rotor assembly;

the stator component interacts with the magnetic component to drive the rotor component to rotate.

3. The acoustic wave motor of claim 2, further comprising a stator frame;

the stator support is provided with a through hole along the length direction, the rotor assembly penetrates through the through hole, and the magnetic part is positioned in the stator support;

the first limiting portion of the iron core faces the rotor assembly, and the first limiting portion is connected with the stator support.

4. The acoustic motor of claim 2, wherein the rotor assembly includes a rotor support for securing the magnetic member;

the number of the magnetic parts is two, and the two magnetic parts are oppositely arranged in the rotor bracket;

the number of the stator assemblies is two, the two stator assemblies are oppositely arranged on the outer side of the rotor support, one stator assembly is oppositely arranged with one magnetic piece, and the other stator assembly is correspondingly oppositely arranged with the other magnetic piece.

5. The acoustic motor of claim 4, wherein the rotor bracket has two spaced bar-shaped grooves, and the two magnetic members are correspondingly inserted into the bar-shaped grooves.

6. The acoustic motor of claim 4, wherein both of the magnetic members are injection molded integrally with the rotor support; the magnetic part is a magnet or an electromagnet.

7. The acoustic wave motor of claim 6, further comprising a housing and a rear end cap;

the rear end cover is positioned at one end of the shell and is connected with the shell;

the stator assembly and the rotor assembly are both positioned in the shell, and one end of the rotor assembly is rotationally connected with the rear end cover;

the other end of the rotor component is connected with a transmission shaft, and the transmission shaft penetrates out of the machine shell and is rotatably connected with the front end cover of the machine shell.

8. The acoustic motor according to claim 2, wherein the first stopper has an arc-shaped groove formed at a center of an end surface of one side of the rotor assembly.

9. An acoustic motor, comprising an iron core, a coil and a stator frame;

the iron core comprises a first limiting part, a second limiting part and a connecting part for winding the coil; one end of the connecting part is connected with the first limiting part, and the other end of the connecting part is connected with the second limiting part;

a clamping hole is formed in the side wall of the stator support, and the first limiting part can be clamped in the clamping hole;

a winding space is formed between the side wall of the stator support and the second limiting part, and the side wall of the stator support and the end face, facing the winding space, of the second limiting part are both planes.

10. A sonic electric toothbrush comprising a sonic motor according to any of claims 2 to 9.

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