CN210142930U - Motor core and electric toothbrush - Google Patents

Abstract

The utility model discloses a motor core and electric toothbrush relates to motor core technical field. This motor core includes canceling release mechanical system, actuating mechanism, circuit assembly, first support and second support, and actuating mechanism includes rotor and stator, and the rotor rotates to be installed in the stator, and canceling release mechanical system is connected with the rotor, and can drive the rotor and reset, and stator and canceling release mechanical system install in first support in proper order, and circuit assembly rotates with rotor or stator to be connected, and install in the second support, and first support and second support integrated into one piece. The motor core and the electric toothbrush have the characteristics of convenience in assembly, lower cost and lower noise.

Description

Motor core and electric toothbrush

Technical Field

The utility model relates to a motor core technical field particularly, relates to a motor core and electric toothbrush.

Background

Along with the improvement of the quality of life of people, the attention on oral health care is more and more, and the electric toothbrush also more and more walks into family life.

At present, the electric toothbrush drives the brush head to act through the electric power, such as a rotary electric toothbrush and a vibration electric toothbrush, the existing vibration motor and the motor core are respectively independent structures, namely, the vibration motor is provided with a shell structure for fixing a rotor and a stator structure, the motor core is provided with a motor mounting structure for mounting a motor, the two are separated, the assembly process is complex, the cost is high, and the noise is large.

In view of the above, it is important to develop a motor core and an electric toothbrush that can solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor core, it has the assembly facility, the cost is lower, and the less characteristics of noise.

Another object of the present invention is to provide an electric toothbrush, which has the features of convenient assembly, low cost and low noise.

The utility model provides a technical scheme:

in a first aspect, an embodiment of the present invention provides a motor core, including a reset mechanism, a driving mechanism, a circuit assembly, a first bracket and a second bracket; the driving mechanism comprises a rotor and a stator, the rotor is rotatably arranged in the stator, the resetting mechanism is connected with the rotor and can drive the rotor to reset, and the stator and the resetting mechanism are sequentially arranged on the first support; the circuit assembly is rotatably connected with the rotor or the stator and is arranged on the second support, and the first support and the second support are integrally formed.

With reference to the first aspect, in a first implementation manner of the first aspect, the motor core further includes a third bracket, the third bracket is connected to the first bracket and encloses an installation space together, and the stator and the reset mechanism are sequentially installed in the installation space and are clamped by the first bracket and the second bracket together.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, a first connecting portion is convexly disposed at one end of the first bracket, which is close to the second bracket; and a third connecting part is convexly arranged on the end face, close to one end of the second support, of the third support, the first connecting part corresponds to the third connecting part, and the third connecting part is connected with the first connecting part so as to connect the first support and the third support.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, a third connection hole and a third positioning hole are formed in the third connection portion, and the third connection hole is located at a bottom wall of the third positioning hole; the first connecting portion is located in the third positioning hole and matched with the third positioning hole, so that a bolt or a screw can penetrate through the third connecting hole to detachably connect the third connecting portion and the first connecting portion.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, a first fixing groove is formed in one end of the first support, which is away from the second support, and a third fixing groove is formed in one end of the third support, which is away from the second support; the first fixing groove corresponds to the third fixing groove, and the inner walls of the first fixing groove and the second fixing groove jointly enclose an annular space so as to clamp the stator in the annular space jointly.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, a first connection hole is formed in an edge of the first fixing groove in the radial direction, and a third connection hole is formed in an edge of the third fixing groove in the radial direction; the first connection hole corresponds to the third connection hole so that a bolt or a screw can pass through the first connection hole and the third connection hole to detachably connect the first bracket and the third bracket.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, in an edge in the radial direction of the first fixing groove and an edge in the radial direction of the second fixing groove, a first positioning hole is optionally formed in the edge, and a first positioning pillar is convexly disposed on another edge corresponding to the edge where the first positioning hole is located, where the first positioning pillar is located in the first positioning hole.

With reference to the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, a fixed sealing ring is further disposed at one end of the first bracket, the fixed sealing ring is used for accommodating a sealing element, and the rotor extends out of the installation space through the fixed sealing ring.

With reference to the first aspect and the foregoing implementation manner, in an eighth implementation manner of the first aspect, the first bracket is provided with a first sealing groove, the first sealing groove is located at an end of the fixed sealing ring close to the installation space, the second bracket is provided with a second sealing groove corresponding to the first sealing groove, and inner walls of the first sealing groove and the second sealing groove jointly enclose an annular space with a diameter larger than an aperture of the fixed sealing ring so as to accommodate the sealing element together with the fixed sealing ring.

In a second aspect, an embodiment of the present invention further provides an electric toothbrush, including the motor core. The motor core comprises a reset mechanism, a driving mechanism, a circuit assembly, a first bracket and a second bracket; the driving mechanism comprises a rotor and a stator, the rotor is rotatably arranged in the stator, the resetting mechanism is connected with the rotor and can drive the rotor to reset, and the stator and the resetting mechanism are sequentially arranged on the first support; the circuit assembly is rotatably connected with the rotor or the stator and is arranged on the second support, and the first support and the second support are integrally formed.

Compared with the prior art, the embodiment of the utility model provides a motor core and electric toothbrush are for prior art's beneficial effect:

the driving mechanism comprises a rotor and a stator, the rotor or the stator is connected with the circuit assembly, the rotor is rotatably installed in the stator, the resetting mechanism is connected with the rotor and can drive the rotor to reset, the stator and the resetting mechanism are sequentially installed on the first support, the circuit assembly is installed on the second support, and the first support and the second support are integrally formed. Therefore, the driving mechanism and the circuit assembly are installed on the first support and the second support which are integrally formed respectively, the reset mechanism and the stator are installed on the first support simultaneously, the shell parts of the driving mechanism are reduced, the driving mechanism can be directly assembled on the first support during assembly, the assembly convenience is improved, the cost of the motor core is reduced, in addition, the collision of the parts of the motor core can be reduced through fewer shell parts, the noise of the motor core is reduced, the assembly process is simplified, and the assembly accumulated error is reduced.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a schematic structural view of an electric toothbrush with a motor core according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a motor core provided in an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the motor core provided in the embodiment of the present invention in an open state.

Fig. 4 is a schematic view of a lower part structure of a motor core when a turntable is opened according to an embodiment of the present invention.

Fig. 5 is a partial enlarged structural view at V in fig. 4.

Icon: 100-an electric toothbrush; 20-a brush head; 30-a brush handle; 10-motor core; 11-a first support; 111-reinforcing ribs; 112-a first connection; 113-a first fixing groove; 114-a first connection hole; 115-a first locating hole; 116-a first positioning post; 117-stationary seal ring; 118-a first seal groove; 12-a second scaffold; 121-a separator; 13-a third scaffold; 131-an installation space; 132-a third connecting portion; 133-third connection hole; 134-a third positioning hole; 135-a third fixing groove; 136-fourth connection hole; 137-a third seal groove; 17-a reset mechanism; 18-a drive mechanism; 181-rotor; 182-a stator; 19-circuit components.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like refer to orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally used to place the products of the present invention, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Example (b):

referring to fig. 1, fig. 1 is a schematic structural view of a motor core 10 applied to an electric toothbrush 100 according to an embodiment of the present invention.

An embodiment of the utility model provides a motor core 10, this motor core 10 have the assembly convenient, the cost is lower, and the less characteristics of noise. The motor movement 10 can be applied to products requiring vibration, such as an electric toothbrush 100, a depilating instrument, a skin tendering instrument, a tooth flushing device and the like, and the motor movement 10 can also be independently used.

Taking the motor core 10 applied to the electric toothbrush 100 as an example, the electric toothbrush 100 may include the motor core 10 described above to complete the vibration operation through the motor core 10, of course, the electric toothbrush 100 may further include a brush head 20 and a brush handle 30, the motor core 10 may be installed in the brush handle 30, and the motor core 10 is in transmission connection with the brush head 20 to drive the brush head 20 to vibrate to complete the tooth brushing action.

Because the electric toothbrush 100 adopts the motor core 10 provided by the embodiment of the present invention, the electric toothbrush 100 also has the characteristics of convenient assembly, low cost and low noise.

The structural composition, the working principle and the beneficial effects of the motor core 10 provided by the embodiment of the present invention will be specifically described below.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a motor core 10 according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of the motor movement 10 provided in the embodiment of the present invention in an open state.

This motor core 10 includes canceling release mechanical system 17, actuating mechanism 18, circuit assembly 19, first support 11 and second support 12, wherein actuating mechanism 18 is connected with brush head 20, and first support 11 and second support 12 do canceling release mechanical system 17, actuating mechanism 18 and circuit assembly 19's casing, in order to practice thrift casing cost, the convenience of assembly can be improved to less casing, assembly process has been simplified, assembly error's accumulation has been reduced, reduce the collision between the casing, motor core 10's noise is reduced.

The driving mechanism 18 includes a rotor 181 and a stator 182, the rotor 181 or the stator 182 is connected to the circuit assembly 19, the rotor 181 is rotatably mounted in the stator 182, the reset mechanism 17 is connected to the rotor 181 and can drive the rotor 181 to reset, the stator 182 and the reset mechanism 17 are sequentially mounted on the first bracket 11, that is, the rotor 181 of the stator 182 of the driving mechanism 18 is mounted on the first bracket 11, the reset mechanism 17 is also mounted on the first bracket 11, the circuit assembly 19 is mounted on the second bracket 12, and the first bracket 11 and the second bracket 12 are integrally formed.

In this way, the driving mechanism 18 and the circuit assembly 19 are respectively installed on the first bracket 11 and the second bracket 12 which are integrally formed, the reset mechanism 17 and the stator 182 are simultaneously installed on the first bracket 11, the shell parts of the driving mechanism 18 are reduced, the driving mechanism 18 can be directly assembled on the first bracket 11 during assembly, the assembly convenience and the cost of the motor core 10 are improved, in addition, the gaps among the components of the motor core 10 can be reduced through fewer shell parts, the collision among the components is reduced, and the noise of the motor core 10 is reduced.

In this embodiment, the stator 182 of the driving mechanism 18 has a coil, and the rotor 181 has a corresponding magnet, so that the stator 182 drives the rotor 181 to oscillate, but in another embodiment, the stator 182 may have a magnet, and the rotor 181 may have a coil, so that the rotor 181 drives itself to oscillate with respect to the stator 182.

In addition, the extension directions of the first support 11, the second support 12 and the third support 13 are the same, the outer walls of the first support 11, the second support 12 and the third support 13 are provided with the reinforcing ribs 111 in a protruding manner, and the extension directions of the reinforcing ribs 111 are the extension directions of the first support 11, so that the structural strength of the first support 11, the second support 12 and the third support 13 is increased, and the assembly of the motor core 10 and the brush handle 30 is facilitated.

Referring to fig. 3 and 4, fig. 4 is a schematic view of a lower portion structure of a motor core 10 provided in an embodiment of the present invention when a turntable is opened.

The motor core 10 may further include a third bracket 13, the third bracket 13 is connected to the first bracket 11 and jointly encloses an installation space 131, the stator 182 and the reset mechanism 17 are sequentially installed in the installation space 131, and the first bracket 11 and the third bracket 13 jointly clamp the reset mechanism 17 and the stator 182, that is, the reset mechanism 17 and the stator 182 and the rotor 181 of the driving mechanism 18 are both installed in the installation space 131 and jointly clamped by the first bracket 11 and the third bracket 13, so as to improve the stability of the driving mechanism 18 and the reset mechanism 17.

Further, a third connecting portion 132 is provided on an end surface of the third bracket 13 near one end of the second bracket 12 in a protruding manner, that is, the third connecting portion 132 is a protrusion extending from the third bracket 13 in the direction of the second bracket 12.

The first connecting portion 112 is protruded from an end of the first bracket 11 close to the second bracket 12, and the first connecting portion 112 corresponds to the third connecting portion 132, and the third connecting portion 132 is connected to the first connecting portion 112 to connect the first bracket 11 and the third bracket 13.

In addition, a partition 121 may be further protruded at an end of the second bracket 12 close to the first bracket 11, and a side surface of the partition 121 is disposed toward an extending direction of the second bracket 12, that is, the partition 121 separates the gap between the second bracket 12 and the third bracket 13 and the circuit assembly 19, so that an influence of the driving mechanism 18 in the installation space 131 on the circuit assembly 19 during operation is further reduced, and stability of the motor cartridge 10 is improved.

Further, the third connecting portion 132 may further have a third connecting hole 133 and a third positioning hole 134, and the third connecting hole 133 is located at the bottom wall of the third positioning hole 134.

The first connecting portion 112 is located in the third positioning hole 134, and the first connecting portion 112 is matched with the third positioning hole 134, so that a bolt or a screw can pass through the third connecting hole 133 to detachably connect the third connecting portion 132 and the first connecting portion 112, in other words, when the first connecting portion 112 is connected with the third connecting portion 132, the first connecting portion 112 extends into the third positioning hole 134, the first connecting portion 112 is matched with an inner cavity of the third positioning hole 134 to define the position of the first connecting portion 112, and then the screw or the screw is passed through the third connecting hole 133 to connect the first connecting portion 112 and the third connecting portion 132, thereby improving the connection accuracy of the first bracket 11 and the third bracket 13.

Further, the third positioning hole 134 is a countersunk hole, that is, an opening edge of the third positioning hole 134 has an inclined surface, so that the first connecting portion 112 is guided into the third positioning hole 134, and the convenience of assembly is improved.

Referring to fig. 3, 4 and 5, fig. 5 is a schematic view of a partial enlarged structure at V in fig. 4.

The first fixing groove 113 is formed in one end, away from the second support 12, of the first support 11, the third fixing groove 135 is formed in one end, away from the second support 12, of the third support 13, and the first fixing groove 113 corresponds to the third fixing groove 135, and the first fixing groove 113 and the inner wall of the third fixing groove 135 jointly enclose an annular space, so that the stator 182 is clamped in the annular space, and the stability of the stator 182 is further improved.

Further, a first connection hole 114 is formed at an edge of the first fixing groove 113 in the radial direction, and correspondingly, a fourth connection hole 136 is formed at an edge of the third fixing groove 135 in the radial direction, wherein the first connection hole 114 corresponds to the fourth connection hole 136, so that a bolt or a screw can pass through the first connection hole 114 and the fourth connection hole 136 to detachably connect the first bracket 11 and the third bracket 13, so that the first fixing groove 113 and an inner wall of the third fixing groove 135 more firmly clamp the stator 182.

It should be noted that, in this embodiment, the number of the first connection holes 114 and the number of the fourth connection holes 136 are two, the two first connection holes 114 are respectively located at two side edges of the first fixing groove 113 in the radial direction, the two fourth connection holes 136 are respectively located at two side edges of the third connection groove in the radial direction, and the two first connection holes 114 are respectively in one-to-one correspondence with the two fourth connection holes 136, so that bolts or screws can connect the first bracket 11 and the third bracket 13 at two sides of the annular space, and pass through the first connection holes 114 and the fourth connection holes 136 to detachably connect the first bracket 11 and the third bracket 13, thereby further improving the stability of the fixed stator 182.

Further, any edge of the edges of the first fixing groove 113 and the third fixing groove 135 in the radial direction is provided with a first positioning hole 115, and the other edge corresponding to the edge where the first positioning hole 115 is located is provided with a first positioning post 116 in a protruding manner, and the first positioning post 116 is located in the first positioning hole 115. And then the relative position of the first connection hole 114 and the fourth connection hole 136 is limited by the first positioning hole 115 and the first positioning column 116, and the connection surface precision is improved.

It should be noted that, in the present embodiment, the first fixing groove 113 is provided with a first positioning hole 115 on a radial edge, and the first positioning pillar 116 is located on a radial edge of the third fixing groove 135, while in other embodiments, the first positioning pillar 116 may also be located on a radial edge of the first fixing groove 113, and the first positioning may also be located on a radial edge of the third fixing groove 135.

With reference to fig. 5, a fixing seal ring 117 is further disposed at one end of the first bracket 11, the fixing seal ring 117 is used for accommodating a sealing element, the rotor 181 extends out of the mounting space 131 from the fixing seal ring 117 to seal a gap between the rotor 181 and the first bracket 11 through the sealing element, and by disposing the fixing seal ring 117 on the first bracket 11, a situation that a sealing effect of the sealing element is reduced due to an existing annular deformation for fixing the sealing element formed by split assembly is avoided, so as to improve a sealing effect of the sealing element.

Further, the first bracket 11 may be formed with a first sealing groove 118, the first sealing groove 118 is located at one end of the fixed sealing ring 117 close to the installation space 131, the third bracket 13 is also formed with a third sealing groove 137 corresponding to the first sealing groove 118, inner walls of the first sealing groove 118 and the third sealing groove 137 jointly enclose an annular space with a diameter larger than an aperture of the fixed sealing ring 117, so as to accommodate the sealing element together with the fixed sealing ring 117, that is, the annular space enclosed by the first sealing groove 118 and the third sealing groove 137 is located at one end of the fixed sealing ring 117 close to the installation space 131, and the sealing element is disposed in the fixed sealing ring 117 and the annular space, so as to accommodate the sealing element together, so that the sealing element is not easy to fall off, and the sealing effect of the sealing element is ensured.

The embodiment of the utility model provides a motor core 10's theory of operation is:

the driving mechanism 18 includes a rotor 181 and a stator 182, the rotor 181 or the stator 182 is connected to the circuit assembly 19, the rotor 181 is rotatably mounted in the stator 182, the reset mechanism 17 is connected to the rotor 181 and can drive the rotor 181 to reset, the stator 182 and the reset mechanism 17 are sequentially mounted on the first bracket 11, that is, the rotor 181 of the stator 182 of the driving mechanism 18 is mounted on the first bracket 11, the reset mechanism 17 is also mounted on the first bracket 11, the circuit assembly 19 is mounted on the second bracket 12, and the first bracket 11 and the second bracket 12 are integrally formed. In this way, the driving mechanism 18 and the circuit assembly 19 are respectively installed on the first bracket 11 and the second bracket 12 which are integrally formed, the reset mechanism 17 and the stator 182 are simultaneously installed on the first bracket 11, the shell parts of the driving mechanism 18 are reduced, the driving mechanism 18 can be directly assembled on the first bracket 11 during assembly, the assembly convenience is improved, the cost of the motor core 10 is reduced, the collision of the components of the motor core 10 can be reduced through fewer shell parts, the noise of the motor core 10 is reduced, the assembly process is simplified, and the assembly accumulated error is reduced.

In summary, the following steps:

an embodiment of the utility model provides a motor core 10, it has the assembly facility, the cost is lower, and the less characteristics of noise.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that the features in the above embodiments may be combined with each other without conflict, and various modifications and variations of the present invention are possible. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A motor core is characterized by comprising a reset mechanism, a driving mechanism, a circuit assembly, a first bracket and a second bracket;

the driving mechanism comprises a rotor and a stator, the rotor is rotatably arranged in the stator, the resetting mechanism is connected with the rotor and can drive the rotor to reset, and the stator and the resetting mechanism are sequentially arranged on the first support;

the circuit assembly is rotatably connected with the rotor or the stator and is arranged on the second support, and the first support and the second support are integrally formed.

2. The motor movement according to claim 1, further comprising a third bracket, wherein the third bracket is connected to the first bracket and encloses a mounting space together, and the stator and the reset mechanism are sequentially mounted in the mounting space and clamped by the first bracket and the second bracket together.

3. The motor cartridge of claim 2, wherein a first connector is disposed at an end of the first bracket adjacent to the second bracket;

and a third connecting part is convexly arranged on the end face, close to one end of the second support, of the third support, the first connecting part corresponds to the third connecting part, and the third connecting part is connected with the first connecting part so as to connect the first support and the third support.

4. The motor core according to claim 3, wherein the third connecting portion has a third connecting hole and a third positioning hole, and the third connecting hole is located in a bottom wall of the third positioning hole;

the first connecting portion is located in the third positioning hole and matched with the third positioning hole, so that a bolt or a screw can penetrate through the third connecting hole to detachably connect the third connecting portion and the first connecting portion.

5. The motor core according to claim 2, wherein a first fixing groove is formed in one end of the first bracket, which is far away from the second bracket, and a third fixing groove is formed in one end of the third bracket, which is far away from the second bracket;

the first fixing groove corresponds to the third fixing groove, and the inner walls of the first fixing groove and the second fixing groove jointly enclose an annular space so as to clamp the stator in the annular space jointly.

6. The motor core according to claim 5, wherein a first connection hole is formed in a radial direction edge of the first fixing groove, and a third connection hole is formed in a radial direction edge of the third fixing groove;

the first connection hole corresponds to the third connection hole so that a bolt or a screw can pass through the first connection hole and the third connection hole to detachably connect the first bracket and the third bracket.

7. The motor core according to claim 5, wherein a first positioning hole is formed in any one of the edges of the first fixing groove in the radial direction and the edges of the second fixing groove in the radial direction, and a first positioning post is convexly disposed on the other edge corresponding to the edge where the first positioning hole is located, and the first positioning post is located in the first positioning hole.

8. The motor cartridge according to claim 2, wherein a stationary seal ring is further provided at one end of the first bracket, the stationary seal ring being configured to receive a seal, the rotor extending from the stationary seal ring out of the mounting space.

9. The motor core according to claim 8, wherein the first bracket is provided with a first sealing groove, the first sealing groove is located at an end of the fixed sealing ring close to the installation space, the second bracket is provided with a second sealing groove corresponding to the first sealing groove, and inner walls of the first sealing groove and the second sealing groove jointly enclose an annular space with a diameter larger than an aperture of the fixed sealing ring so as to accommodate the sealing element together with the fixed sealing ring.

10. An electric toothbrush comprising a motor cartridge according to any one of claims 1 to 9.

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