CN217563505U - High-performance slender sound wave toothbrush motor - Google Patents

Abstract

The utility model provides a high-performance slender sound wave toothbrush motor, which comprises a shell, a stator core, a coil winding, a motor shaft and a permanent magnet component, wherein the stator core comprises an iron core magnetizer matched with the coil winding and an iron core main body matched with the permanent magnet component; the iron core magnetizer includes wire winding portion, and the magnetic conduction arm portion that extends from wire winding portion, coil winding twines on wire winding portion, and coil winding and wire winding portion distribute in the tip department of motor shaft along the axial of motor shaft, permanent magnetic part, the axial straight extension of motor shaft is all followed to iron core main part and magnetic conduction arm portion, thereby permanent magnetic part, iron core main part and magnetic conduction arm portion distribute in proper order radially inside and outside along the motor shaft, thereby can reduce the cross sectional dimension of this sound wave toothbrush motor, make the sound wave toothbrush motor make slender type easily, and then can be applicable to elongated appearance betterly, length direction has abundant inner space, but the electric toothbrush that inner space is comparatively nervous on the width direction, the suitability is greatly improved.

Description

High-performance slender sound wave toothbrush motor

Technical Field

The utility model relates to a motor especially relates to a long and thin sound wave toothbrush motor of high performance.

Background

The electric toothbrush mainly comprises a motor (namely a motor) and a brush head, wherein the brush head generates high-frequency vibration through the rapid operation of the motor, so that toothpaste is instantly decomposed into fine foam to deeply clean teeth gaps; meanwhile, the vibration of the brush hair on the brush head can promote the blood circulation in the oral cavity, and has a certain massage effect on the gum tissue. Thus, the motor is a major component of the electric toothbrush.

Further, the motor for the electric toothbrush at present mainly includes a stator portion and a rotor portion; the stator part comprises a shell, a stator core and a coil winding, wherein the stator core and the coil winding are both fixed on the shell; the rotor part comprises a motor shaft which is rotatably supported in the shell through a bearing, and a permanent magnet which is fixed on the outer surface of the motor shaft; the stator core is matched with the permanent magnet. The coil winding may be a single coil structure disposed on a single side of the motor shaft or a double coil structure disposed on both sides of the motor shaft. However, in either a single coil structure or a double coil structure, the coil winding and the stator core are distributed on the outer peripheral side of the motor shaft along the radial direction of the motor shaft, that is, the coil winding and the stator core are vertically distributed with respect to the motor shaft, so that the coil winding and the stator core jointly occupy a cross-sectional space, and the cross-sectional size of the motor for the electric toothbrush is difficult to be reduced, and thus the motor is difficult to be applied to an electric toothbrush having a slim shape and a large inner space in the length direction.

SUMMERY OF THE UTILITY MODEL

In view of the above-described shortcomings of the prior art, it is an object of the present invention to provide a high performance elongated sonic toothbrush motor with a small cross-sectional size.

In order to achieve the above object, the present invention provides a high performance slender sound wave toothbrush motor, comprising a housing, a stator core and a coil winding both fixed to the housing, a motor shaft rotatably supported in the housing, and a permanent magnet component fixed to the motor shaft, wherein the stator core comprises an iron core magnetizer matched with the coil winding, and an iron core main body matched with the permanent magnet component;

the iron core magnetizer comprises a winding part and a magnetic conduction arm part extending from the winding part, the coil winding is wound on the winding part, the coil winding and the winding part are distributed at the end part of the motor shaft along the axial direction of the motor shaft, the permanent magnet part, the iron core main body and the magnetic conduction arm part all extend straightly along the axial direction of the motor shaft, and the permanent magnet part, the iron core main body and the magnetic conduction arm part are sequentially distributed inside and outside along the radial direction of the motor shaft;

the iron core magnetizer is formed by laminating and riveting a plurality of first silicon steel sheets along the radial direction of the motor shaft, the iron core main body is formed by laminating and riveting a plurality of second silicon steel sheets along the axial direction of the motor shaft, and the outer surface of each first silicon steel sheet and the outer surface of each second silicon steel sheet are respectively provided with an insulating layer.

Furthermore, the first silicon steel sheets are U-shaped silicon steel sheets, and the iron core magnetizer formed by stacking and riveting a plurality of first silicon steel sheets is provided with two magnetic conduction arm parts which are symmetrically distributed along the radial direction of the motor shaft.

Furthermore, the U-shaped silicon steel sheet is of a sectional structure and comprises two L-shaped sections which are symmetrically distributed along the radial direction of the motor shaft.

Further, the U-shaped silicon steel sheet is of a sectional structure and comprises a linear section and an L-shaped section.

Further, the U-shaped silicon steel sheet is of a sectional structure and comprises three sections of straight line sections.

Further, the iron core main body and the magnetic conduction arm part are in surface contact fit.

Furthermore, the inner surface of the second silicon steel sheet facing the permanent magnet component is an arc surface.

Further, the shell includes the main casing body and the tip casing that distribute side by side along the motor shaft axial, the motor shaft rotationally supports in the main casing body through first bearing and second bearing respectively, permanent magnetism part is located the main casing body, coil winding and iron core magnetizer are all fixed in the tip casing body, the iron core main part is fixed in the main casing body.

Further, the first mounting groove of holding first bearing and the second mounting groove of holding second bearing are seted up respectively to the both ends of main casing body, the inner circle of first bearing and motor shaft are fixed continuous and the first bearing of shelves is only ended to the inner tank bottom of first mounting groove, the inner circle of second bearing and motor shaft are fixed continuous and the inner tank bottom of second mounting groove ends the shelves second bearing.

Further, the main shell and the end shell are both integrally molded injection molding parts.

Further, the end portion shell comprises a shell bottom and shell side wing portions fixed at two ends of the shell bottom, a first groove for accommodating the winding portion is formed in the shell bottom, a second groove for accommodating the magnetic conduction arm portion is formed in the shell side wing portions, and the first groove is communicated with the second groove.

Further, along the axial of motor shaft, the center of iron core main part misplaces with the center of permanent magnetism part.

As mentioned above, the high performance slender sound wave toothbrush motor of the present invention has the following beneficial effects:

in this application, distribute coil winding and stator core's wire winding portion at the tip of motor shaft along the axial of motor shaft to make permanent magnetic component, iron core main part and magnetic conduction arm all follow the straight extension of the axial of motor shaft, can reduce the cross sectional dimension of this sound wave toothbrush motor from this, make the sound wave toothbrush motor make slenderness type easily, and then can be applicable to elongated appearance betterly, have wide inner space in length direction, but the electric toothbrush that inner space is comparatively nervous in width direction, improve the suitability greatly.

Drawings

Fig. 1 is a schematic view of the construction of a high performance elongated sonic toothbrush motor of the present application.

Fig. 2 is a cross-sectional view of a high performance elongated sonic toothbrush motor of the present application.

Fig. 3 is a schematic view of a high performance elongated acoustic wave toothbrush motor of the present application with the housing omitted.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a front view of fig. 3.

Fig. 6 and 7 are schematic structural views of the end shell in different viewing angles in the present application.

Fig. 8 is a schematic structural view of the winding portion in the present application.

Fig. 9 is a schematic structural view of the first silicon steel sheet in fig. 8.

Fig. 10 is a schematic structural diagram of a magnetic conductive arm portion according to the present application.

Fig. 11 is a schematic structural view of the second silicon steel sheet in fig. 10.

Fig. 12a to 12d are preferred embodiments of the first silicon steel sheet in the present application.

Description of the element reference

10. Outer cover

11. Main shell

111. First mounting groove

112. Second mounting groove

113. Plug-in groove

12. End shell

121. Bottom of the shell

122. Side wing part of shell

123. The first groove

124. Second groove

20. Stator core

21. Iron core magnetizer

211. Winding part

212. Magnetic conductive arm

22. Iron core main body

23. First silicon steel sheet

231 L-shaped segment

232. Straight line segment

24. Second silicon steel sheet

241. Arc surface

30. Coil winding

40. Motor shaft

50. Permanent magnet component

60. First bearing

70. Second bearing

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.

The present application provides a high performance elongated sonic toothbrush motor for use with an electric toothbrush. As shown in fig. 1 to 5, the high-performance slim sonic toothbrush motor according to the present application includes a housing 10, a stator core 20 and a coil winding 30 both fixed to the housing 10, a motor shaft 40 rotatably supported in the housing 10 by a bearing, and a permanent magnet part 50 fixed to an outer circumference of the motor shaft 40, the motor shaft 40 being made of a magnetically conductive material. For convenience of description, in the present embodiment, as shown in fig. 1, an axial direction of the motor shaft 40 is defined as a Z direction, and two radial directions, in which the motor shaft 40 is orthogonal to the Z direction, are defined as an X direction and a Y direction, respectively; the Z direction is a front-rear direction, the X direction is a left-right direction, and the Y direction is an up-down direction.

Further, as shown in fig. 1 to 5, the stator core 20 includes a core magnetizer 21 matched with the coil winding 30 and a core main body 22 distributed at the periphery of the permanent magnet element 50 and matched with the permanent magnet element 50, and the core magnetizer 21 and the core main body 22 are two independent components, so that the stator core 20 is a split structure. The core magnetizer 21 includes a winding portion 211, and a magnetic arm portion 212 extending from the winding portion 211, the winding portion 211 extends straight in the radial direction of the motor shaft 40, the coil winding 30 is wound on the winding portion 211, and the coil winding 30 and the winding portion 211 are distributed at the end of the motor shaft 40 in the axial direction Z of the motor shaft 40; the permanent magnet part 50, the core main body 22 and the magnetic conductive arm part 212 all extend straightly along the axial direction Z of the motor shaft 40, and the permanent magnet part 50, the core main body 22 and the magnetic conductive arm part 212 are distributed in the radial direction X of the motor shaft 40 in order from the inside to the outside. Further, as shown in fig. 8 and 9, the iron core magnetizer 21 is formed by laminating and riveting a plurality of first silicon steel sheets 23 along the radial direction Y of the motor shaft 40, and an insulating layer is disposed on the outer surface of each first silicon steel sheet 23; as shown in fig. 10 and 11, the core main body 22 is formed by laminating and riveting a plurality of second silicon steel sheets 24 along the axial direction Z of the motor shaft 40, and an insulating layer is disposed on an outer surface of each second silicon steel sheet 24.

When the high-performance slender sound wave toothbrush motor works, alternating current is introduced into the coil winding 30, a magnetic circuit is generated in the iron core magnetizer 21 of the stator iron core 20 and is conducted to the iron core main body 22, as shown in fig. 5; the magnetic flux generated by the stator core 20 interacts with the permanent magnet 50 to convert the electric energy into mechanical energy, so as to drive the motor shaft 40 to swing, and the brush head of the electric toothbrush is fixed on the motor shaft 40, so that the motor shaft 40 drives the brush head of the electric toothbrush to swing rapidly. In particular, in the present invention, the coil winding 30 and the winding portion 211 are distributed at the rear end of the motor shaft 40 along the axial direction of the motor shaft 40, instead of being distributed at the outer circumferential side of the motor shaft 40 along the radial direction of the motor shaft 40 as in the prior art, and the permanent magnet part 50, the core main body 22 and the magnetic arm portion 212 are combined to extend straight along the axial direction of the motor shaft 40, so that the sectional size of the acoustic wave toothbrush motor can be effectively reduced, the acoustic wave toothbrush motor can be easily made into a slim type, and the acoustic wave toothbrush motor can be well applied to an electric toothbrush having a slim shape, a wide inner space in the length direction, and a tight inner space in the width direction, and the applicability of the acoustic wave toothbrush motor is greatly improved. Meanwhile, as shown in fig. 5 and 8, the magnetic flux direction in the iron core magnetizer 21 is the X direction along the winding portion 211 and the Z direction along the magnetic conductive arm portion 212, the riveting direction of the plurality of first silicon steel sheets 23 constituting the iron core magnetizer 21 is the Y direction, the riveting direction of the first silicon steel sheets 23 is perpendicular to the magnetic flux direction in the iron core magnetizer 21, and then the first silicon steel sheets 23 are combined to be a very thin sheet-like structure with an insulating layer coated on the surface, so that the eddy current formed in the iron core magnetizer 21 can be limited in a very thin sheet-like space, and the eddy current loss of the iron core magnetizer 21 is greatly reduced. Similarly, as shown in fig. 5 and 10, the magnetic flux direction in the iron core main body 22 is the X direction along the iron core main body 22, and the riveting direction of the plurality of second silicon steel sheets 24 constituting the iron core main body 22 is the Z direction, so that the riveting direction of the second silicon steel sheets 24 is perpendicular to the magnetic flux direction in the iron core main body 22, and then the second silicon steel sheets 24 are combined to be a very thin sheet-like structure with an insulating layer coated on the surface, so that the eddy current formed in the iron core main body 22 can be limited in a very thin sheet-like space, and the eddy current loss of the iron core main body 22 is greatly reduced. Therefore, the eddy current loss is greatly reduced and the performance of the motor is improved on the premise of effectively reducing the section size of the motor.

Further, in the embodiment shown in fig. 1 to 5, only one coil winding 30 is provided in the high performance slim sonic toothbrush motor, and the coil winding 30 has a single-side coil structure, that is, both the coil winding 30 and the winding portion 211 are distributed at the rear end of the motor shaft 40 along the axial direction of the motor shaft 40. A pair of permanent magnet members 50 are arranged; accordingly, the core main bodies 22 of the stator core 20 are also arranged in a pair and correspond to the permanent magnet members 50 one by one, and the magnetic conductive arm portions 212 of the core magnetic conductors 21 of the stator core 20 are also arranged in a pair and correspond to the core main bodies 22 one by one. Preferably, as shown in fig. 3 and 4, each permanent magnet member 50 is bipolar, having an N pole and an S pole; namely: each permanent magnet part 50 comprises two permanent magnets with different polarities, and the two permanent magnets forming each permanent magnet part 50 are arranged in an abutting mode along the circumferential direction of the motor shaft 40 and extend along the axial direction of the motor shaft 40, so that the permanent magnets are of a slender strip-shaped structure; the two permanent magnet parts 50 connected have a gap therebetween in the circumferential direction of the motor shaft 40.

Further, as shown in fig. 8 and 9, the core magnetizer 21 is U-shaped and has a pair of magnetic arms 212 symmetrically distributed along the radial direction X of the motor shaft 40; correspondingly, the first silicon steel sheet 23 constituting the core magnetizer 21 is a U-shaped silicon steel sheet. The magnetic conductive arm part 212 is in a cuboid structure, and the inner surface and the outer surface of the magnetic conductive arm part are both planes; as shown in fig. 4, the core main body 22 is substantially Y-shaped, and has an inner surface of an arc surface 241 and an outer surface of a flat surface. Therefore, the core main body 22 and the magnetic arm 212 are in surface contact with each other, and magnetic conduction therebetween is achieved. The second silicon steel sheet 24 constituting the iron core main body 22 is a Y-shaped silicon steel sheet, and the inner surface of the second silicon steel sheet 24 facing the permanent magnet member 50 is an arc surface 241.

Further, in order to facilitate the winding of the coil winding 30, the U-shaped iron core magnetizer 21 is made into a sectional structure, and accordingly, the U-shaped silicon steel sheets (i.e., the first silicon steel sheets 23) laminated and riveted to form the iron core magnetizer 21 are also made into a sectional structure. Based on this, the U-shaped silicon steel sheet of the sectional structure has several preferred embodiments as follows.

In the first embodiment of the U-shaped silicon steel sheet, as shown in fig. 12a, the U-shaped silicon steel sheet includes two L-shaped segments 231 symmetrically distributed along the radial direction X of the motor shaft, a portion of each L-shaped segment 231 extending along the X direction to the left and right forms a winding portion 211 of the iron core magnetizer 21, and a portion of each L-shaped segment 231 extending along the Z direction to the front and back forms a magnetizer portion 212 of the iron core magnetizer 21.

In the second embodiment of the U-shaped silicon steel sheet, as shown in fig. 12b, the U-shaped silicon steel sheet includes a linear segment 232 and an L-shaped segment 231 which are arranged side by side along the X direction, the linear segment 232 extends forward and backward along the Z direction to form one magnetic conductive arm portion 212 of the core magnetic conductor 21, a portion of the L-shaped segment 231 extending leftward and rightward along the X direction forms the winding portion 211 of the core magnetic conductor 21, and a portion of the L-shaped segment 231 extending forward and backward along the Z direction forms the other magnetic conductive arm portion 212 of the core magnetic conductor 21.

In the third embodiment of the U-shaped silicon steel sheet, as shown in fig. 12c, the U-shaped silicon steel sheet includes three linear segments 232, wherein one linear segment 232 extends left and right along the X direction to form the winding portion 211 of the iron core magnetizer 21, and the other two linear segments 232 extend front and back along the Z direction to form the two magnetic conductive arm portions 212 of the iron core magnetizer 21. Further, the two linear segments 232 extending forward and backward in the Z direction extend to the front end surfaces of the linear segments 232 extending leftward and rightward in the X direction, and they are in surface contact with each other in the forward and backward directions.

In the fourth embodiment of the U-shaped silicon steel sheet, as shown in fig. 12d, the U-shaped silicon steel sheet includes three linear segments 232, which are substantially the same as the third embodiment of the U-shaped silicon steel sheet, and the difference is that: in the fourth embodiment of the U-shaped silicon steel sheet, the rear ends of the two linear segments 232 extending forward and backward in the Z direction are flush with the rear ends of the linear segments 232 extending leftward and rightward in the X direction, and the two linear segments are in contact fit with each other in the left-right direction.

Preferably, the length of the iron core main body 22 is different from the length of the permanent magnet part 50 along the axial direction of the motor shaft 40, so that the center of the iron core main body 22 is offset from the center of the permanent magnet part 50, and the distance between the center of the iron core main body 22 and the center of the permanent magnet part 50 is greater than or equal to 0.2mm, so that the magnetic force tends to pull the permanent magnet part 50 to the middle, the permanent magnet part 50 transmits the acting force to the motor shaft 40, and the motor shaft 40 is subjected to the Z-direction magnetic force, thereby helping to eliminate the Z-direction play of the bearings (the first bearing 60 and the second bearing 70 described below) and reducing the noise.

Further, as shown in fig. 1 and 2, the housing 10 includes a main housing 11 and an end housing 12 which are arranged side by side in the front-rear direction along the axial direction of the motor shaft 40, the motor shaft 40 is rotatably supported in the main housing 11 by a first bearing 60 and a second bearing 70, respectively, the permanent magnet member 50 is located in the main housing 11, the coil windings 30 and the core conductors 21 are fixed to the end housing 12, and the core body 22 is fixed to the main housing 11. Preferably, the main housing 11 and the end housing 12 are integrally formed as injection molded parts, which is advantageous for reducing cost and facilitating assembly.

Further, the first bearing 60 is distributed at the front end of the main housing 11, and the second bearing 70 is distributed at the rear end of the main housing 11, and the first bearing 60 and the second bearing 70 are used for realizing encapsulation. Specifically, as shown in fig. 2, a first mounting groove 111 for accommodating the first bearing 60 is formed at the front end of the main housing 11, the inner ring of the first bearing 60 is fixedly connected to the motor shaft 40, and a groove bottom stopper at the inner end of the first mounting groove 111 forms a backward movement limit for the first bearing 60; the rear end of the main housing 11 is provided with a second mounting groove 112 for accommodating the second bearing 70, the inner ring of the second bearing 70 is fixedly connected with the motor shaft 40, and the groove bottom of the inner end of the second mounting groove 112 stops the second bearing 70 to limit the second bearing 70 to move forward. When the motor shaft 40 and the main housing 11 are assembled, the motor shaft 40 is inserted into the inner hole of the main housing 11, and the first bearing 60 is driven backward into the first mounting groove 111 of the main housing 11 from the front end of the motor shaft 40 until the first bearing 60 abuts against the groove bottom at the rear end of the first mounting groove 111, so that the first bearing 60 presses the main housing 11 inward. Similarly, the second bearing 70 is driven forward from the rear end of the motor shaft 40 into the second mounting groove 112 of the main housing 11 until the second bearing 70 abuts against the groove bottom of the front end of the second mounting groove 112, and the second bearing 70 presses the main housing 11 inward. After the first bearing 60 and the second bearing 70 are mounted, the first bearing 60 and the second bearing 70 are assembled from the outside of the main housing 11 and the main housing 11 is clamped by the fastening force of the inner race of the first bearing 60 and the motor shaft 40 and the fastening force of the inner race of the second bearing 70 and the motor shaft 40, thereby achieving the packaging of the product. Moreover, when the motor shaft 40 and the main housing 11 are assembled, the first bearing 60 and the second bearing 70 only need to be knocked in from the outer side of the main housing 11 correspondingly, the product is packaged and the bearings are installed for one-step riveting, the installation process is saved, and the assembly efficiency is improved.

Preferably, as shown in fig. 1, 6 and 7, the end housing 12 includes a housing bottom 121 and housing side wing portions 122 fixed at two ends of the housing bottom 121, a first groove 123 accommodating the winding portion 211 is opened in the housing bottom 121, a second groove 124 accommodating the magnetic conductive arm portion 212 is opened in the housing side wing portions 122, and the first groove 123 is communicated with the second groove 124. The rear end of the main housing 11 is provided with an insertion groove 113, and the front end of the housing side wing part 122 is inserted into the insertion groove 113 of the main housing 11 in a tight fit manner, so as to realize the fixed connection between the main housing 11 and the end housing 12. The upper and lower sides of the main housing 11 are cut planes flush with the coil windings 30, respectively.

Further, the inner race of the first bearing 60 is riveted or adhesively fixed to the motor shaft 40, and the inner race of the second bearing 70 is riveted or adhesively fixed to the motor shaft 40. The end shell 12 is fixedly connected with the iron core magnetizer 21 in an injection molding mode, so that the end shell 12, the iron core magnetizer 21 and the coil winding 30 are fixed into an independent prefabricated part, the winding of the coil winding 30 is facilitated, and the processing, the assembly and the maintenance of the high-performance slender sound wave toothbrush motor are also facilitated. In addition, a flexible member having elasticity may be provided between the inner end of the first bearing 60 and the groove bottom of the first mounting groove 111, where the flexible member is appropriately compressed to generate a forward force. A resiliently flexible member may also be provided between the inner end of the second bearing 70 and the bottom of the second mounting groove 112 where appropriate compression of the flexible member produces the rearward force. The flexible member is a silicone ring or a washer made of other elastic materials, so that the first bearing 60 and the second bearing 70 are flexibly supported. In this way, when the outer ring of the first bearing 60 and/or the second bearing 70 is stressed in the front-rear direction Z in a staggered manner, the flexible member can eliminate the Z-directional play of the first bearing 60 and/or the second bearing 70, thereby eliminating the running noise of the first bearing 60 and/or the second bearing 70. In addition, when the motor shaft 40 is subjected to Z-direction impact force in falling, the flexible part can buffer the impact force and play a certain protection role.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.

Claims (11)

1. A high-performance elongated sound wave toothbrush motor comprising a housing (10), a stator core (20) and a coil winding (30) both fixed to the housing (10), a motor shaft (40) rotatably supported in the housing (10), and a permanent magnet member (50) fixed to the motor shaft (40), characterized in that: the stator core (20) comprises a core magnetizer (21) matched with the coil winding (30) and a core main body (22) matched with the permanent magnet component (50);

the iron core magnetizer (21) comprises a winding part (211) and a magnetic conduction arm part (212) extending from the winding part (211), the coil winding (30) is wound on the winding part (211), the coil winding (30) and the winding part (211) are distributed at the end part of the motor shaft (40) along the axial direction of the motor shaft (40), the permanent magnet part (50), the iron core main body (22) and the magnetic conduction arm part (212) all extend straightly along the axial direction of the motor shaft (40), and the permanent magnet part (50), the iron core main body (22) and the magnetic conduction arm part (212) are sequentially distributed inside and outside along the radial direction of the motor shaft (40);

the iron core magnetizer (21) is formed by laminating and riveting a plurality of first silicon steel sheets (23) along the radial direction of the motor shaft (40), the iron core main body (22) is formed by laminating and riveting a plurality of second silicon steel sheets (24) along the axial direction of the motor shaft (40), and insulating layers are arranged on the outer surface of each first silicon steel sheet (23) and the outer surface of each second silicon steel sheet (24).

2. The high performance elongated acoustic wave toothbrush motor of claim 1, wherein: the first silicon steel sheets (23) are U-shaped silicon steel sheets, and the iron core magnetizer (21) formed by overlapping and riveting the plurality of first silicon steel sheets (23) is provided with two magnetic conduction arm parts (212) which are symmetrically distributed along the radial direction of the motor shaft (40).

3. The high performance elongated sonic toothbrush motor of claim 2, wherein: the U-shaped silicon steel sheet is of a sectional structure and comprises two L-shaped sections (231) which are symmetrically distributed along the radial direction of the motor shaft (40).

4. The high performance elongated sonic toothbrush motor of claim 2, wherein: the U-shaped silicon steel sheet is of a sectional structure and comprises a linear section (232) and an L-shaped section (231).

5. The high performance elongated acoustic wave toothbrush motor of claim 2, wherein: the U-shaped silicon steel sheet is of a sectional structure and comprises three linear sections (232).

6. The high performance elongated sonic toothbrush motor of claim 1, wherein: the iron core main body (22) is in surface contact fit with the magnetic conduction arm part (212).

7. The high performance elongated acoustic wave toothbrush motor of claim 1, wherein: the inner surface of the second silicon steel sheet (24) facing the permanent magnet component (50) is an arc surface (241).

8. The high performance elongated acoustic wave toothbrush motor of claim 1, wherein: the motor shaft structure is characterized in that the shell (10) comprises a main shell (11) and an end shell (12) which are axially distributed side by side along a motor shaft (40), the motor shaft (40) is rotatably supported in the main shell (11) through a first bearing (60) and a second bearing (70), the permanent magnet component (50) is located in the main shell (11), the coil winding (30) and the iron core magnetizer (21) are fixed on the end shell (12), and the iron core main body (22) is fixed on the main shell (11).

9. The high performance elongated acoustic wave toothbrush motor of claim 8, wherein: the first mounting groove (111) of the first bearing (60) of holding and second mounting groove (112) of holding second bearing (70) are seted up respectively to the both ends of main casing body (11), the inner circle of first bearing (60) and motor shaft (40) are fixed continuous, and the first bearing (60) of shelves are ended to the inner tank bottom of first mounting groove (111), the inner circle of second bearing (70) and motor shaft (40) are fixed continuous, and second bearing (70) are ended to the inner tank bottom of second mounting groove (112).

10. The high performance elongated sonic toothbrush motor of claim 8, wherein: the end portion shell (12) comprises a shell bottom portion (121) and shell side wing portions (122) fixed to two ends of the shell bottom portion (121), a first groove (123) used for containing the winding portion (211) is formed in the shell bottom portion (121), a second groove (124) used for containing the magnetic conduction arm portion (212) is formed in the shell side wing portion (122), and the first groove (123) is communicated with the second groove (124).

11. The high performance elongated acoustic wave toothbrush motor of claim 1, wherein: the center of the iron core main body (22) is dislocated with the center of the permanent magnet part (50) along the axial direction of the motor shaft (40).

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