CN210780369U

CN210780369U - Motor for electric toothbrush

Info

Publication number: CN210780369U
Application number: CN201921976133.7U
Authority: CN
Inventors: 周海春
Original assignee: Jiangsu Anchor Tools Co ltd
Current assignee: Jiangsu Tengya Iron Anchor Tool Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-06-16
Anticipated expiration: 2029-11-15

Abstract

The utility model relates to the field of small motors, and provides a motor for an electric toothbrush, which comprises a rotating shaft, a motor front cover, a motor rear cover, a rotor assembly, a stator assembly and a motor shell, wherein the stator assembly comprises a yoke ring and an enameled wire coil, the enameled wire coil is wound on a T-shaped winding post arranged on the yoke ring relative to a memory, the motor shell is an injection molding part, and the yoke ring is fixedly connected with the motor shell in an embedding injection molding mode; the utility model discloses a motor adopts the mode of embedding injection molding, with yoke ring embedding motor housing inside wall, because motor housing adopts the material that has excellent electrical insulation performance to make, showing the fault rate that has reduced this motor, and its stator module and motor housing in close contact with, the leakproofness of motor has been improved, reduce the resonance phenomenon of motor, the entering of dust and dirt has been stopped, and need not adopt iron shell and insulating support, manufacturing process has been reduced, show and promoted production efficiency, manufacturing has been reduced simultaneously.

Description

Motor for electric toothbrush

Technical Field

The utility model relates to a small-size motor field particularly, relates to a motor for electric toothbrush.

Background

Existing power toothbrushes are generally classified into rotary and acoustic type. Rotary electric toothbrushes usually use a dc small motor, which is generally not very different, but mainly different in the choice of motor power. The motor of the acoustic wave type electric toothbrush is generally classified into a mechanical torsion type vibration motor, a brushed rotation motor, a brushed reciprocating type vibration motor, a brushless reciprocating type vibration motor, and the like according to types.

The mechanical torsion type oscillation motor drives a rotor of the eccentric mechanical mechanism to vibrate in a reciprocating mode by controlling the change of a coil magnetic field, a transmission shaft of the mechanical torsion type oscillation motor is of an eccentric structure and is limited by a single spring piece or a mechanical baffle plate, so that the mechanical torsion type oscillation motor is low in vibration frequency, high in noise, high in requirement on mechanical materials and low in service life; the brush rotating motor drives the gear to transmit through the rotating shaft and finally converts the gear into reciprocating vibration or directly drives the eccentric shaft to rotate to form vibration, the vibration frequency is not high, the noise is high, and the service life mainly depends on the quality of an electric brush material; the brush reciprocating type vibration motor drives the middle shaft to do reciprocating type rotation motion through the electromagnetic field change on the rotor, the electromagnetic coil is arranged on the rotor, the mass and the volume are both large, the electric brush is communicated with the electrode of the rotor to conduct electricity, the large vibration frequency can be achieved, extra noise is generated due to the friction of the electric brush, and the service life of the motor is mainly determined by the mass of the electric brush material; the brushless reciprocating vibration motor drives the rotor to do reciprocating rotation motion through the change of the electromagnetic field on the stator, the electromagnetic coil of the brushless reciprocating vibration motor is directly wound on the stator, the rotor is of a pure suspension structure, mechanical friction is avoided, larger vibration frequency can be achieved, the noise is low, the service life is very long, but the cost is very high

For example, patent application No. CN201821318481.0 entitled "high frequency vibration device and electric toothbrush using the same" adopts the following technical proposal: the method comprises the following steps: shell, rotor subassembly and stator module establish in the shell, the rotor subassembly with but be provided with electrical coil between the stator module, stator module includes stator core, the rotor subassembly includes central pivot, rotor core, N utmost point magnetic stripe and S utmost point magnetic stripe, the stator core cover is established the outside of rotor core, the hollow structure cover that rotor core set up through the middle part is established in the pivot of center, the bottom of center pivot with the inner wall fixed connection of shell, stretch out on the top of center pivot the outside of shell.

However, in the above technical solution: stator module includes stator core, goes up insulating support, lower insulating support and coil, and the quantity of going up insulating support, lower insulating support and coil is a plurality of, goes up insulating support cover and establishes at stator core's top, and lower insulating support cover establishes at stator core's bottom. The technology is the same as the traditional motor technical scheme, and the insulating supports are arranged at the two ends of the iron core to insulate the iron core from the iron motor shell and play a role in protecting the enameled wire; however, the technical scheme of the insulating bracket cannot achieve the optimal insulating effect, and the positioning capability of the insulating bracket is poor, so that the motor generates relatively large vibration, dust and dirt are easy to accumulate, and the problems of high failure rate, high noise, resonance of a machine shell, poor sealing and the like exist in the practical use. There is therefore a need for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the problem of traditional motor adopt the technical scheme of insulating support can not reach the best insulating effect, and its location ability is poor in addition, can make the motor produce vibration big relatively to dust and dirt are also piled up easily, have the fault rate height in the in-service use, the noise is big, the casing resonates, seals badly etc is solved.

The technical scheme of the utility model is that: the utility model provides a motor for electric toothbrush, lid 3, rotor subassembly 4, stator module 5, motor housing 6 behind pivot 1, motor protecgulum 2, the motor, stator module 5 fixing device is inside motor housing 6, the coaxial rotatable installation of rotor subassembly 4 is inside stator module 5, pivot 1 is connected with the axle center drive with rotor subassembly 4, stator module 5 includes yoke ring 51 and enameled coil 52, and this enameled coil 52 is around locating "T" shape wrapping post 511 that yoke ring 51 set up for the relative memory, motor housing 6 is the injection molding, yoke ring 51 adopts the mode and motor housing 6 fixed connection that the embedding was moulded plastics.

In the preferred embodiment of the present invention, the motor housing 6 is made of PC material, but is not limited to engineering plastic with excellent electrical insulation.

The utility model discloses an in the preferred embodiment, be provided with the spacing joint of "H" shape on the side that motor housing 6 was kept away from to lid 3 behind the motor, lid 3 is same whole behind "H" shape spacing joint and the motor, and this "H" shape spacing joint is used for with electric toothbrush shell inner wall connection, plays spacing and fixed action.

The utility model discloses an in the preferred embodiment, lid 3 is gone up to embedded 2 electrode inserted sheets 31 that are provided with behind the motor, the setting of this electrode inserted sheet 31 symmetry is in "H" shape spacing joint both sides, the inside and outside wall of lid 3 behind the motor is all stretched out at electrode inserted sheet 31 both ends, and this electrode inserted sheet 31 is used for connecting the positive negative pole of motor enamelled coil 52, for its power supply.

In the preferred embodiment of the present invention, the yoke ring 51 is formed by stacking silicon steel sheets.

In the preferred embodiment of the present invention, a plurality of symmetrical screw holes 61 are formed along the circumferential direction at one side of the motor housing 6, which is abutted to the motor front cover 2, and a reinforcement portion 62 protruding outward is formed at a position corresponding to the screw holes 61.

In the preferred embodiment of the present invention, the motor housing 6, the motor rear cover 3, and the motor front cover 2 are made of PC material, but not limited to engineering plastic with excellent electrical insulation property.

Compared with the prior art, the utility model discloses the beneficial effect who produces does:

(1) the utility model discloses a motor for electric toothbrush adopts the mode that the embedding was moulded plastics, imbeds the motor housing inside wall with the yoke ring, because motor housing adopts the material that has excellent electrical insulation performance to make, is showing the fault rate that has reduced this motor to its stator module and motor housing in close contact with have improved the leakproofness of motor, reduce the resonance phenomenon of motor, have stopped the entering of dust and dirt.

(2) The utility model discloses a motor for electric toothbrush need not adopt iron shell and insulating support, has reduced manufacturing procedure, is showing and has promoted production efficiency, has reduced manufacturing cost simultaneously.

Drawings

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

Fig. 1 is a schematic longitudinal sectional view of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention.

Fig. 3 is a perspective view of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely through the following detailed description.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The utility model provides a, its concrete structure is as shown in figure 1, lid 3, rotor subassembly 4, stator module 5, motor housing 6 behind pivot 1, motor protecgulum 2, the motor, stator module 5 fixing device is inside motor housing 6, the coaxial rotatable installation of rotor subassembly 4 is inside stator module 5, pivot 1 is connected with the axle center drive with rotor subassembly 4, stator module 5 includes yoke ring 51 and enameled coil 52, and this enameled coil 52 is around locating "T" shape wrapping post 511 that yoke ring 51 set up for the relative memory, motor housing 6 is the injection molding, yoke ring 51 adopts the mode and the motor housing 6 fixed connection of embedding injection molding.

In the preferred embodiment of the present invention, the motor housing 6, the motor rear cover 3 and the motor front cover 2 are made of PC material, but not limited to engineering plastic with excellent electrical insulation property made of PC material

The above-mentioned embodiments are only described as the preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention, and the technical content of the present invention, which is claimed by the present invention, is fully recorded in the technical claims.

Claims

1. The utility model provides a motor for electric toothbrush, lid (3), rotor subassembly (4), stator module (5), motor casing (6) behind pivot (1), motor protecgulum (2), the motor, stator module (5) fixing device is inside motor casing (6), rotor subassembly (4) coaxial rotatable installs inside stator module (5), pivot (1) is connected its characterized in that with the axle center drive with rotor subassembly (4): the stator assembly (5) comprises a yoke ring (51) and an enameled coil (52), the enameled coil (52) is wound on a T-shaped winding post (511) which is arranged on the yoke ring (51) in a relative memory manner, the motor shell (6) is an injection molding piece, and the yoke ring (51) is fixedly connected with the motor shell (6) in an embedded injection molding manner.

2. A motor for an electric toothbrush according to claim 1, wherein: the side surface of the motor rear cover (3) far away from the motor shell (6) is provided with an H-shaped limiting joint, and the H-shaped limiting joint and the motor rear cover (3) are integrated.

3. A motor for an electric toothbrush according to claim 2, wherein: lid (3) go up the embedded 2 electrode inserted sheets (31) that are provided with behind the motor, the setting of this electrode inserted sheet (31) symmetry is in "H" shape spacing joint both sides, the inside and outside wall of lid (3) behind the motor is all stretched out at electrode inserted sheet (31) both ends.

4. A motor for an electric toothbrush according to claim 1, wherein: the magnetic yoke ring (51) is formed by stacking silicon steel sheets.

5. A motor for an electric toothbrush according to claim 1, wherein: one side of motor housing (6) and butt joint of motor protecgulum (2) is seted up several symmetrical screw hole (61) along circumference in its edge, and the position that corresponds this screw hole (61) has outside bellied boss (62).