CN216625413U

CN216625413U - Rotor assembly for vibration motor in electric toothbrush

Info

Publication number: CN216625413U
Application number: CN202123000450.5U
Authority: CN
Inventors: 李军; 郭志焱; 蔡选杰
Original assignee: Zhejiang Baolong Mechanical And Electrical Co ltd
Current assignee: Zhejiang Baolong Mechanical And Electrical Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-27
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a rotor component of a vibrating motor in an electric toothbrush, which comprises a rotor iron core, a permanent magnet and a rotating shaft, the rotor core is sleeved on the rotating shaft and fixedly connected with the rotating shaft, at least three binding surfaces for binding with the permanent magnet are formed on the peripheral wall of the rotor core, the planes of adjacent binding surfaces are intersected, the two sides of the binding surface of the rotor iron core are provided with positioning bulges, the binding surface is connected with the positioning bulges through a transition surface, the height of the positioning bulge is smaller than the thickness of 1/2 permanent magnet, the permanent magnet comprises a first surface attached to the attaching surface, a second surface back to the first surface and a third surface attached to the transition surface, the first face is connected with the third face, the first face is connected with the second face and the third face is connected with the second face through the connecting face, and the connecting face is abutted to the positioning protrusion. The permanent magnet fixing device is simple in structure, can effectively fix the permanent magnet and prevent the permanent magnet from falling off, and the driving force of the whole structure is stronger.

Description

Rotor assembly for vibration motor in electric toothbrush

Technical Field

The utility model relates to the technical field of motors, in particular to a rotor assembly for a vibration motor in an electric toothbrush.

Background

Electric toothbrushes are new products that have become popular in recent years and have revolutionized the oral care field abroad. Along with the wide popularization of the electric toothbrush in China and the improvement of the cognition of people, the electric toothbrush also becomes an important member of the public health care products. The investigation shows that compared with the common toothbrush, the electric toothbrush is more scientific and effective, can more thoroughly remove dental plaque and reduce gingivitis and gingival bleeding, and can generate high-frequency vibration by the quick reciprocating rotation of the output shaft of the motor, so that toothpaste is instantly decomposed into fine foam to deeply clean teeth; the motor in the existing electric toothbrush usually adopts an alternating current motor, thereby realizing the left-right swing of the electric toothbrush head and realizing the purpose of cleaning teeth, and the existing electric toothbrush motor usually comprises a stator component, a shell and a rotor component, wherein the rotor component comprises a rotating shaft and a rotor core, the rotor core is fixedly connected with the rotating shaft, the rotor core is internally provided with a permanent magnet, the rotating shaft is provided with a bearing, the rotating shaft is combined with the shell through the bearing to realize the reciprocating rotation of the rotating shaft, but the existing rotor core structure usually surrounds and fixes the permanent magnet, so that even if the surrounding structure at the corresponding position of the permanent magnet is arranged to be very light and thin, the phenomenon of magnetic short circuit of part of the permanent magnet can be caused, the magnetic loss of 5 to 10 percent can be generated, the output effect of the whole structure is influenced, and the expected extreme value of the rotating amplitude can not be reached; and in order to reduce the loss of magnetic force, can set up the permanent magnet into fan-shaped at present, and set up the inlay groove on rotor core outer wall, install fan-shaped permanent magnet that sets up in the inlay groove, simultaneously because its fan-shaped setting, the suction effort that leads to its outer fringe to receive is big, and the inner edge atress is little for permanent magnet stable in structure, change the emergence and break away from, need pass through the glue adhesion, but after long-time the use, glue is ageing, also can make the permanent magnet drop.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the rotor assembly for the vibrating motor in the electric toothbrush, which has a simple structure, can more effectively fix the permanent magnet, avoids the permanent magnet from falling off, and enables the driving force of the whole structure to be stronger.

In order to achieve the above object, the present invention provides a rotor assembly for a vibration motor in an electric toothbrush, comprising a rotor core, a permanent magnet and a rotating shaft, wherein the rotor core is sleeved on the rotating shaft and fixedly connected with the rotating shaft, at least three binding surfaces for binding the permanent magnet are formed on the outer peripheral wall of the rotor core, the planes of adjacent binding surfaces are intersected, positioning protrusions are arranged on two sides of the binding surface of the rotor core, the binding surface is connected with the positioning protrusions through a transition surface, the height of the positioning protrusions is smaller than the thickness of 1/2 permanent magnet, the permanent magnet comprises a first surface attached to the binding surface, a second surface opposite to the first surface, and a third surface attached to the transition surface, the first surface is connected with the third surface, and the first surface is connected with the second surface and the third surface is connected with the second surface through connecting surfaces, the connecting surface abuts against the positioning protrusion.

The beneficial effect who so sets up is: the arrangement is that the permanent magnet is positioned by being attached to the attaching surface and the transition surface, and the two sides of the attaching surface are provided with the positioning bulges, so that the auxiliary positioning can be realized, the permanent magnet is prevented from being separated in the using process, the deflection of the permanent magnet is also effectively prevented, the further positioning bulges are less than the thickness of 1/2 permanent magnet, the short circuit of the magnetic force of the permanent magnet is effectively avoided, the driving force is effectively improved, the using effect of the whole structure is improved, meanwhile, the attaching surface, the transition surface and the contact surfaces of the positioning bulges and the permanent magnet have larger contact surfaces compared with the second surface of the permanent magnet, the suction force on the second surface of the permanent magnet is less than the sum of the suction force on the first surface, the third surface and the contact surfaces of the connecting surface and the positioning bulges, the possibility of the permanent magnet being separated is reduced, the further permanent magnet is provided with the first surface and the third surface, and the contact surfaces are increased, the magnetic induction line can be better worn out and enter, so that the magnetic force is fully applied, and meanwhile, the magnetic induction line is simple in structure, strong in stability and reliable in use of the whole structure.

As a further arrangement of the utility model, the binding surfaces and the transition surfaces connected with the binding surfaces are combined to form four mounting surfaces, and the adjacent mounting surfaces are symmetrically arranged.

The beneficial effect who so sets up is: set up like this for rotor core structure is convenient for processing production more, has better equilibrium simultaneously, improves overall structure's output effect, and the binding face here is four certainly, and the permanent magnet that corresponds is also four, guarantees that output effect and output are stable.

As a further arrangement of the utility model, the second surface of the permanent magnet is arranged in an arc shape.

The beneficial effect who so sets up is: set up like this, the increase permanent magnet improves overall structure's atress effect towards the lifting surface area of stator core one side, and simple structure does benefit to the realization simultaneously, improves output drive power.

As a further arrangement of the utility model, the first surface of the permanent magnet and the binding surface of the corresponding rotor core, the third surface of the permanent magnet and the corresponding transition surface, and the connecting surface of the permanent magnet and the corresponding positioning bulge are all bonded by glue.

The beneficial effect who so sets up is: the fixing of the permanent magnet on the rotor core is further guaranteed by the arrangement, and meanwhile, the structure is simple, the realization is facilitated, and the using effect of the whole structure is effectively improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a second embodiment of the present invention.

Detailed Description

A first embodiment of a rotor assembly of a vibration motor for use in an electric toothbrush of the present invention is shown in fig. 1: including rotor core 2, permanent magnet 3 and pivot 1, rotor core 2 cover is established on pivot 1 and with pivot 1 fixed connection, be formed with at least three binding face 21 that is used for with the laminating of permanent magnet 3 on the rotor core 2 periphery wall, adjacent binding face 21 place plane is crossing the setting, rotor core 2 is provided with location arch 22 in binding face 21 both sides, be connected through transition face 23 between binding face 21 and the location arch 22, location arch 22 highly is less than 1/2 permanent magnet 3 thickness setting, permanent magnet 3 includes the first face 31 that pastes with binding face 21, the second face 32 that carries on the back with first face 31 and the third face 33 that laminates with transition face 23 mutually, first face 31 links to each other with third face 33, link to each other through connecting face 34 between first face 31 and the second face 32 and between third face 33 and the second face 32 respectively, the connecting surface 34 abuts against the positioning projection 22. The beneficial effect who so sets up is: the arrangement is that the permanent magnet 3 is positioned by being attached to the attaching surface 21 and the transition surface 23, and meanwhile, the positioning protrusions 22 are arranged on two sides of the attaching surface 21, so that auxiliary positioning can be realized, the permanent magnet 3 is prevented from being separated in the using process, the permanent magnet 3 is also effectively prevented from deflecting, the height of the further positioning protrusion 22 is smaller than the thickness of the 1/2 permanent magnet 3, and short circuit of the magnetic force of the permanent magnet 3 is effectively avoided, so that the driving force is effectively improved, the using effect of the whole structure is improved, meanwhile, the attaching surface 21, the transition surface 23, the contact surface of the positioning protrusion 22 and the permanent magnet 3 has a larger contact surface compared with the second surface 32 of the permanent magnet 3, so that the suction force applied to the second surface 32 of the permanent magnet 3 is smaller than the sum of the suction forces applied to the first surface 31, the third surface 33, the contact surface 34 and the contact surface of the positioning protrusion 22, the possibility of loosening of the permanent magnet 3 is reduced, and the further permanent magnet 3 is provided with the first surface 31 and the third surface 33, when the increase contact surface, the confession magnetism that can be better is felt the line and is worn out the entering for magnetic force fully uses, and simple structure simultaneously, stability is strong, makes overall structure use reliable.

As a further arrangement of the present invention, the attachment surfaces 21 and the transition surfaces 23 connected thereto are combined to form four mounting surfaces, and the adjacent mounting surfaces are symmetrically arranged. The beneficial effect who so sets up is: set up like this for rotor core 2 structure is convenient for processing production more, has better equilibrium simultaneously, improves overall structure's output effect, and binding face 21 here is four certainly, and the permanent magnet 3 that corresponds is also four, guarantees that output effect and output are stable.

As a further configuration of the present invention, the first surface 31 of the permanent magnet 3 and the corresponding attachment surface 21 of the rotor core 2, the third surface 33 of the permanent magnet 3 and the corresponding transition surface 23, and the connection surface 34 of the permanent magnet 3 and the corresponding positioning protrusion 22 are all bonded by glue. The beneficial effect who so sets up is: the fixing of the permanent magnet 3 on the rotor core 2 is further ensured by the arrangement, and meanwhile, the structure is simple, the realization is facilitated, and the using effect of the whole structure is effectively improved.

A second embodiment of a rotor assembly of a vibration motor for use in an electric toothbrush according to the present invention is shown in fig. 2: including rotor core 2, permanent magnet 3 and pivot 1, rotor core 2 cover is established on pivot 1 and with pivot 1 fixed connection, be formed with at least three binding face 21 that is used for with the laminating of permanent magnet 3 on the rotor core 2 periphery wall, adjacent binding face 21 place plane is crossing the setting, rotor core 2 is provided with location arch 22 in binding face 21 both sides, be connected through transition face 23 between binding face 21 and the location arch 22, location arch 22 highly is less than 1/2 permanent magnet 3 thickness setting, permanent magnet 3 includes the first face 31 that pastes with binding face 21, the second face 32 that carries on the back with first face 31 and the third face 33 that laminates with transition face 23 mutually, first face 31 links to each other with third face 33, link to each other through connecting face 34 between first face 31 and the second face 32 and between third face 33 and the second face 32 respectively, the connecting surface 34 abuts against the positioning projection 22. The beneficial effect who so sets up is: the arrangement is that the permanent magnet 3 is positioned by being attached to the attaching surface 21 and the transition surface 23, and meanwhile, the positioning protrusions 22 are arranged on two sides of the attaching surface 21, so that auxiliary positioning can be realized, the permanent magnet 3 is prevented from being separated in the using process, the permanent magnet 3 is also effectively prevented from deflecting, the height of the further positioning protrusion 22 is smaller than the thickness of the 1/2 permanent magnet 3, and short circuit of the magnetic force of the permanent magnet 3 is effectively avoided, so that the driving force is effectively improved, the using effect of the whole structure is improved, meanwhile, the attaching surface 21, the transition surface 23, the contact surface of the positioning protrusion 22 and the permanent magnet 3 has a larger contact surface compared with the second surface 32 of the permanent magnet 3, so that the suction force applied to the second surface 32 of the permanent magnet 3 is smaller than the sum of the suction forces applied to the first surface 31, the third surface 33, the contact surface 34 and the contact surface of the positioning protrusion 22, the possibility of loosening of the permanent magnet 3 is reduced, and the further permanent magnet 3 is provided with the first surface 31 and the third surface 33, when the increase contact surface, the confession magnetism that can be better is felt the line and is worn out the entering for magnetic force fully uses, and simple structure simultaneously, stability is strong, makes overall structure use reliable.

As a further arrangement of the present invention, the second surface 32 of the permanent magnet 3 is arc-shaped. The beneficial effect who so sets up is: set up like this, increase permanent magnet 3 is towards the lifting surface area of stator core one side, improves overall structure's atress effect, and simple structure does benefit to the realization simultaneously, improves output drive power.

The above example is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims

1. The utility model provides a rotor subassembly for vibrating motor among electric toothbrush, includes rotor core, permanent magnet and pivot, the rotor core cover establish in the pivot and with pivot fixed connection, its characterized in that: be formed with at least three binding face that is used for with the laminating of permanent magnet on the rotor core periphery wall, the crossing setting in adjacent binding face place plane, rotor core is provided with the location arch in binding face both sides, be connected through the transition face between binding face and the location arch, the protruding height in location is less than 1/2 permanent magnet thickness setting, the permanent magnet includes the first face that pastes mutually with binding face, the second face that carries on the back mutually with the first face and the third face of laminating mutually with the transition face, first face links to each other with the third face, link to each other through being connected the face between first face and the second face and between third face and the second face respectively, it is protruding at the location to connect the face conflict.

2. The rotor assembly for a vibration motor in an electric toothbrush according to claim 1, wherein: the binding surfaces and the transition surfaces connected with the binding surfaces are combined to form four mounting surfaces, and the adjacent mounting surfaces are symmetrically arranged.

3. The rotor assembly for a vibration motor in an electric toothbrush according to claim 1, wherein: the second surface of the permanent magnet is arranged in an arc shape.

4. The rotor assembly for a vibration motor in an electric toothbrush according to claim 1, wherein: and the first surface of the permanent magnet is bonded with the bonding surface of the corresponding rotor core, the third surface of the permanent magnet is bonded with the corresponding transition surface, and the connecting surface of the permanent magnet is bonded with the corresponding positioning bulge through glue.