CN113708588B

CN113708588B - Vibration motor

Info

Publication number: CN113708588B
Application number: CN202110949902.XA
Authority: CN
Inventors: 张金泉; 黄登治; 黄道臣; 黄拔梓
Original assignee: Shenzhen Lebond Technology Co ltd
Current assignee: Shenzhen Lebond Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2023-06-02
Anticipated expiration: 2041-08-18
Also published as: CN113708588A

Abstract

The utility model provides a vibrating motor, which comprises a housin, stator frame and rotor, be equipped with the stator frame in the casing, the stator frame is including assembling each other and being two pieces of silicon steel of concave style of calligraphy, the silicon steel includes body portion and joint portion, body portion is used for winding the coil, body portion forms the magnetic pole along the axial of stator frame, the casing is used for fixed rotor, the rotor corresponds at least a pair of magnetic pole setting of stator frame respectively, be used for the magnetic line of induction magnetic pole and swing from top to bottom, joint portion looks adaptation equipment each other, be equipped with the anti-skidding mechanism that is used for restricting the silicon steel and produce relative movement along the axial on the joint portion. The vibrating motor in this application forms the magnetic pole through the stator frame that can assemble, through the stator core that can assemble, compares prior art, has shown its convenience of assembling the change of motor inner structure.

Description

Vibration motor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a vibration motor.

Background

With the development of electronic technology, portable consumer electronic products are increasingly being touted by people, such as mobile phones, palm game machines, navigation devices or palm multimedia entertainment devices, etc., and vibration motors are generally used for system feedback, such as incoming call prompts, information prompts, navigation prompts, vibration feedback of game machines, etc. The wide application requires the high performance and long service life of the vibration motor.

In the prior art, the vibration motor comprises a fixed part, a vibration part arranged in the fixed part and an elastic connecting piece. The fixed part comprises a shell and a cover plate, the shell and the cover plate form an accommodating space, the vibration part comprises a coil or magnetic steel, and the elastic connecting piece is used for suspending and supporting the vibration part in the accommodating space.

The magnetic steel (such as silicon steel sheet) is usually a complete and integrated design structure. This causes certain drawbacks, such as a. Inconvenient assembly of the magnet steel and coil support (bobbin) on site; b. the winding difficulty is increased, and the rapid external winding operation and the accurate wire arrangement control are not facilitated; c. the elastic connecting piece (such as a spring piece) is connected with the end cover of the motor, and when the spring pieces with different thicknesses are to be replaced, the die communicated with the end cover is required to be replaced together, so that the manufacturing cost is increased.

Disclosure of Invention

The application provides a vibrating motor to improve its convenience of assembling and changing of motor inner structure.

In order to solve the problems, the technical scheme provided by the application is as follows:

the utility model provides a vibrating motor, includes casing, stator frame and rotor, be equipped with the stator frame in the casing, the stator frame is including assembling each other and be two pieces of silicon steel that are concave style of calligraphy, the silicon steel includes body portion and joint portion, body portion is used for winding the coil, body portion is followed the axial of stator frame forms the magnetic pole, the casing is used for fixing the rotor, the rotor corresponds respectively at least a pair of magnetic pole setting of stator frame is used for the response the magnetic line of magnetic pole and the luffing motion, joint portion looks adaptation equipment each other, be equipped with the anti-skidding mechanism that is used for restricting the silicon steel and produces relative movement along the axial on the joint portion.

In one possible design, the anti-slip mechanism includes a protrusion disposed on one piece of silicon steel and a recess disposed on the other piece of silicon steel, and the protrusion is correspondingly assembled in the recess.

In one possible design, the protrusions are matched with the recesses to form concave-convex shapes with opposite semicircular shapes or triangular shapes or rectangular shapes.

In one possible design, the rotor is mounted in the housing by means of an elastic connection assembly.

In one possible design, the elastic connection assembly includes a spring piece, the housing is provided with a mounting groove, the spring piece is inserted in the mounting groove, and the rotor is connected with the housing through the spring piece.

In one possible design, the elastic connection assembly further includes a spacer, and the spacer is disposed between the spring plate and the housing.

In one possible design, the rotor includes a permanent magnet and a motor shaft that are connected, the spring piece includes a recess portion and an abutment portion, the motor shaft is mounted in the recess portion, the abutment portion is connected with the housing, and the thickness of the spring piece is adjustable.

In one possible design manner, the casing includes detachable upper casing and lower casing, the upper casing with assemble through profile of tooth structure adaptation between the lower casing, the stator frame includes axial fixed structure, the upper casing or the lower casing is equipped with the draw-in groove structure, axial fixed structure card is located the draw-in groove structure.

In one possible design, the axial fixing structure comprises a fixing plate, the fixing plate is fixedly arranged at the end part of the silicon steel, and the fixing plate is clamped and inserted into the clamping groove structure.

An electric device comprises a circuit structure and the vibration motor, wherein the vibration motor is electrically connected with the circuit structure.

The beneficial effects of this application:

the vibrating motor in this application forms the magnetic pole through the stator frame that can assemble, through the stator core that can assemble, compares prior art, has shown its convenience of assembling the change of motor inner structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of the self-contained structure of a vibration motor of the present invention;

FIG. 2 is a schematic diagram of a split explosion structure of a vibration motor of the present invention;

fig. 3 is a schematic perspective view of a spring reed in the vibration motor of the present invention;

FIG. 4 is a schematic view of a single silicon steel structure in a vibration motor according to the present invention;

FIG. 5 is an enlarged schematic view of the structure corresponding to the area A in FIG. 4;

FIG. 6 is a schematic diagram of the structure of the enlarged region A in FIG. 4;

fig. 7 is a schematic diagram of the three structures corresponding to the enlarged region a in fig. 4.

Reference numerals:

10. a rotor frame;

11. a permanent magnet;

20. a stator bobbin;

21. a body portion;

221. concave-convex matching;

222. an axial fixing structure;

22. a joint;

30. a housing;

31. a tooth-shaped structure;

32. a clamping groove structure;

40. a spring piece;

41. a recessed portion;

42. an abutting portion;

50. a gasket.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise. In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present application, it should be understood that the terms "inner," "outer," "upper," "bottom," "front," "rear," and the like indicate an orientation or a positional relationship (if any) based on that shown in fig. 1, merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application.

It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings by way of example, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.

The existing vibration motor has the defects that the contained magnetic steel (such as silicon steel sheets) is of a complete integrated design structure, inconvenient to assemble and assemble, difficult to coil, inconvenient to replace internal components and the like. In order to solve the defects of the prior art, the application therefore provides a vibration motor, so as to improve the convenience of assembly and replacement of the internal structure of the motor.

First, the present embodiment first proposes an implementation protection scheme of a vibration motor:

as shown in fig. 1 and 2, a vibration motor includes a housing 30, a stator frame 20 and a rotor 10, wherein the housing 30 is used for fixing the rotor 10, the housing 30 is internally provided with the stator frame 20, coils are wound on the stator frame 20, the stator frames 20 are mutually assembled to form at least one pair of magnetic poles in a concave shape, and the stator frames 20 are provided with stator cores assembled in a mutually matched manner.

The vibration motor in this application forms the magnetic pole through stator frame 20 that can assemble, through stator core that can assemble, compares prior art, has showing the convenience of its assembly change of motor inner structure improved.

The following describes the arrangement relation of the respective members in detail.

As shown in fig. 2, the rotor 10 is disposed corresponding to at least one pair of magnetic poles of the stator frame 20, and is configured to induce magnetic lines of force of the magnetic poles to swing up and down. Specifically, the rotor 10 is disposed at one end of the housing 30, the stator frame 20 is disposed at the other end of the housing 30, the rotor 10 is disposed against or adjacent to the stator frame 20, and the rotor 10 swings by sensing the magnetic force of the stator frame 20.

As shown in fig. 2, the stator frame 20 includes at least two pieces of silicon steel that can be assembled together to form a concave shape, the silicon steel includes a body portion 21 and a joint portion 22, the coil is wound around the body portion 21, the body portion 21 forms a magnetic pole along an axial direction of the stator frame 20, the joint portion 22 is assembled and assembled relatively to form the stator core, and an anti-slip mechanism for limiting the silicon steel to move relatively along the axial direction is provided on the joint portion 22.

As shown in fig. 4 to 7, the joint portions 22 of the two silicon steels are opposite to each other and are assembled with each other by the concave-convex fit 221 to limit the axial movement between the two silicon steels. Specifically, the anti-slip mechanism comprises a protrusion arranged on one piece of silicon steel and a recess arranged on the other piece of silicon steel, and the protrusion is correspondingly assembled in the recess. The structure not only can play a role in limiting and anti-skidding, but also can be beneficial to reducing magnetic gaps.

Preferably, the protrusion is formed in a semicircular shape, a triangular shape or a rectangular shape corresponding to the concave-convex fitting 221 formed by fitting the recess. The gap between the two opposite engagement portions 22 is less than 0.1mm. The coil is an enameled wire and is spirally wound on the body portion 21.

As shown in connection with fig. 2 and 3, the rotor 10 is mounted in the housing 30 by means of an elastic connection assembly.

Specifically, the elastic connection assembly includes a spring piece 40 and a spacer 50, the housing 30 is provided with a mounting groove, the spring piece 40 is inserted in the mounting groove, the spacer 50 is arranged between the spring piece 40 and the housing 30, and the rotor 10 is connected with the housing 30 through the spring piece.

Further, the rotor 10 includes a permanent magnet 11 and a motor shaft connected to each other, the spring plate 40 includes a recess 41 and an abutment 42, the motor shaft is mounted to the recess 41, the abutment 42 is connected to the housing 30, and the thickness of the spring plate 40 is adjustable.

As shown in fig. 1 and 2, the housing 30 includes a detachable upper housing and a detachable lower housing, the upper housing and the lower housing are assembled by a tooth structure 31 in an adapting manner, and, as shown in fig. 4, the stator frame 20 includes an axial fixing structure 222, the upper housing or the lower housing is provided with a clamping groove structure 32, and the axial fixing structure 222 is clamped in the clamping groove structure 32.

Preferably, the axial fixing structure 222 may be fixing plates perpendicular to the axial direction, and the fixing plates are respectively and fixedly mounted at two ends of the silicon steel, and when mounted, the fixing plates are tightly inserted into the clamping groove structure 32 of the upper shell or the lower shell, so as to ensure that the stator frame 20 does not axially move.

After having the above structural features, the present application may be implemented as follows:

the application provides a vibration motor, see fig. 1 and 2, comprising a stator frame 20, wherein the stator frame 20 comprises two silicon steels which can be assembled, and each silicon steel is used for forming one magnetic pole, so that a pair of magnetic poles N-S are formed. The silicon steel comprises a body part 21 extending towards one side and a joint part 22 connected with the body part 21, and the two silicon steels form a concave stator core through the joint part 22. During assembly, the enameled wires can be wound on the body part 21 respectively, and then the two pieces of silicon steel are combined through the joint part 22, so that the speed and convenience of a winding process are greatly improved. And, utilize spiral winding, produce electromagnetic force in the axial of motor, enameled wire utilization ratio increases to 100%. After assembly, the air gap/clearance of the two silicon steels at the joint part 21 is smaller than 0.1mm, so that the magnetic loss can be reduced.

As shown in fig. 4 to 7, for this purpose, one joint 22 is provided with a protrusion, and the other joint 22 is provided with a recess, and the relative movement of the two joints 22 in the axial direction is restricted by the protrusion and the recess forming a concave-convex fit 221. The male-female engagement 221 may be semi-circular, triangular or square. Compared with the whole arrangement of the silicon steel, the stator frame 20 spliced by two silicon steels is easy to increase magnetic loss due to axial movement of any silicon steel, so that the axial movement generated between the two silicon steels needs to be prevented.

Further, as shown in fig. 2 and 3, the vibration motor further includes a housing 30 and a spring piece 40, and the rotor 10 is connected to the housing 30 through the spring piece 40 to limit the swing angle. The shell 30 is provided with a mounting groove for inserting the spring leaf 40, the gasket 50 is firstly placed in the mounting groove, then the spring leaf 40 is inserted into the mounting groove, the gasket 50 is a plastic part, the spring leaf 40 is a metal part, and the gasket 50 can prevent the spring leaf 40 from directly striking the shell 30.

The thickness of the spring piece 40 can be flexibly set, preferably, the thickness of the spring piece 40 is 0.20mm to 0.40mm or more preferably 0.30mm, and different spring piece thicknesses are replaced according to the requirement of the elastic force.

As shown in fig. 3, the spring piece 40 includes a concave portion 41 and an abutting portion 42, the concave portion 41 is fixed on the rotating shaft, the abutting portion 42 is used for being connected with the housing 30, and according to the output size of torque, after a certain deformation amount of the spring piece 40 is met, enough material deformation allowance is provided, so that no deformation allowance of the straight plate spring piece is avoided; and the structure is compact.

As shown in fig. 2, the rotor frame 10 comprises a permanent magnet 11 and a motor rotating shaft, and the rotor frame 10 is designed to have the functions of fixing the permanent magnet 11 on the rotating shaft, fixing the spring piece 40 after reverse riveting and the like; permanent magnet 11 structure and setting of magnetizing, motor shaft can be changed at any time according to the actual installation demand in order to satisfy the structural match of complete machine product, simple structure, the adjustment shell fragment thickness of being convenient for.

On the other hand, the shell 30 further comprises a tooth-shaped structure 31 provided with edges of the upper shell and the lower shell, and the upper shell and the lower shell are connected through the tooth-shaped structure 31 or a triangle structure, so that the key that the parts are firmly and stably connected is met. The upper and lower clamping groove structures 32 are used for being mechanically pressed with the fixing plates 222 at two ends of the silicon steel after the installation is completed, so that the stator frame 20 is prevented from moving axially under the condition of axial force.

After the implementation process is completed, the following characteristics of the application can be embodied:

1) The vibrating motor can be wound conveniently, and the assembly flexibility is good;

2) The elastic sheets with different thicknesses can be replaced, the elastic force is changed, the large-range torque output is realized, and the large-torque output and the low-power output can be realized under the same size and structure.

In the second embodiment, the present embodiment further provides a structural combination scheme of the vibration motor:

based on the first embodiment, this embodiment further optimizes the structure of the stator bobbin 20 and the rotor 10 in the vibration motor, and is different from the first embodiment in that,

a plurality of unit areas may be provided in the same housing, and a unit body composed of one stator frame 20 and one rotor 10 as shown in fig. 1 or 2 is installed in each unit area, and then stator cores in the plurality of unit areas are assembled in combination.

Preferably, such unit areas may be three or four, constituting a triangular or tetragonal assembly structure.

The electromagnetic effects after assembly should be superimposed.

The other structures are basically the same as those of the first embodiment, and will not be described in detail here.

Embodiment three, this embodiment also proposes the preferred set protection scheme of vibrating motor:

as shown in fig. 1 and 2, a vibration motor includes a housing 30, a stator frame 20 is disposed in the housing 30, a coil is wound on the stator frame 20, the stator frames 20 are assembled with each other and form at least one pair of magnetic poles in a concave shape, and the stator frames 20 have stator cores assembled in a mutually adaptive manner. The vibration motor in this application forms the magnetic pole through stator frame 20 that can assemble, through stator core that can assemble, compares prior art, has showing the convenience of its assembly change of motor inner structure improved. The following describes the arrangement relation of the respective members in detail. As shown in fig. 2, the stator frame 20 includes at least two pieces of silicon steel that can be assembled, the silicon steel includes a body portion 21 and a joint portion 22, the coil is wound on the body portion 21, and the joint portion 22 is assembled in a relatively fit manner to form the stator core. As shown in fig. 4 to 7, the joint portions 22 of the two silicon steels are opposite to each other and are assembled with each other by the concave-convex fit 221 to limit the axial movement between the two silicon steels. Preferably, the concave-convex fitting 221 has a semicircular shape, a triangular shape or a rectangular shape. The gap between the two opposite engagement portions 22 is less than 0.1mm. The coil is an enameled wire and is spirally wound on the body portion 21. As shown in fig. 2 and 3, the rotor 10 is mounted in the housing 30 through an elastic connection assembly, the rotor 10 is disposed at one end of the housing 30, the stator frame 20 is disposed at the other end of the housing 30, the rotor 10 is disposed against or adjacent to the stator frame 20, and the rotor 10 swings by sensing the magnetic force of the stator frame 20. Specifically, the elastic connection assembly includes a spring piece 40 and a spacer 50, the housing 30 is provided with a mounting groove, the spring piece 40 is inserted in the mounting groove, the spacer 50 is arranged between the spring piece 40 and the housing 30, and the rotor 10 is connected with the housing 30 through the spring piece. Further, the rotor 10 includes a permanent magnet 11 and a motor shaft connected to each other, the spring plate 40 includes a recess 41 and an abutment 42, the motor shaft is mounted to the recess 41, the abutment 42 is connected to the housing 30, and the thickness of the spring plate 40 is adjustable. As shown in fig. 1 and 2, the housing 30 includes a detachable upper housing and a detachable lower housing, the upper housing and the lower housing are assembled by a tooth structure 31 in an adapting manner, and, as shown in fig. 4, the stator frame 20 includes an axial fixing structure 222, the upper housing or the lower housing is provided with a clamping groove structure 32, and the axial fixing structure 222 is clamped in the clamping groove structure 32. Preferably, the axial fixing structure 222 may be fixing plates perpendicular to the axial direction, and the fixing plates are respectively and fixedly mounted at two ends of the silicon steel, and when mounted, the fixing plates are tightly inserted into the clamping groove structure 32 of the upper shell or the lower shell, so as to ensure that the stator frame 20 does not axially move.

The present embodiment provides a set of all the preferred modes of the first embodiment, which is convenient to implement as the best set mode in the field.

In the fourth embodiment, the present embodiment further proposes a product application scheme of the vibration motor:

an electric device comprises a circuit structure and the vibration motor, wherein the vibration motor is electrically connected with the circuit structure. (not shown)

In practical application, the electric device may be an electric toothbrush, which includes a main support, a tail support, a circuit board, two contact spring plates and a wireless charging coil.

The circuit board is fixed on the main support and comprises two bonding pads serving as the power-on ends, and the two bonding pads are arranged along the edge of the circuit board. The tail support is connected to the main support in a pluggable mode to form a connection state and a separation state, when the tail support is in the connection state, the contact spring plates are in one-to-one corresponding electric connection with the bonding pads, and when the tail support is in the separation state, the contact spring plates are out of electric connection with the bonding pads. The afterbody support includes first installation department (the preceding terminal surface of support) and second installation department (the outer wall department of support), and first installation department is used for supplying wireless charging coil to wind the arrangement, and the second installation department is used for fixed contact shell fragment, and wherein, the contact shell fragment still includes the body that extends and the electric connection portion that links to each other with the body, electric connection portion supplies wireless charging coil to weld or dip in order to make wireless charging coil can realize the electricity with the contact shell fragment and be connected.

The vibration motor can be conveniently applied to any circuit or electric device needing to be charged.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The vibration motor is characterized by comprising a shell, a stator frame and a rotor, wherein the stator frame is arranged in the shell and comprises two pieces of silicon steel which are mutually assembled to be concave, the silicon steel comprises a body part and a joint part, the body part is used for winding a coil, the body part forms magnetic poles along the axial direction of the stator frame, the shell is used for fixing the rotor, the rotor is respectively arranged corresponding to at least one pair of magnetic poles of the stator frame and is used for inducing magnetic lines of the magnetic poles to swing up and down, the joint parts are mutually matched and assembled, and an anti-slip mechanism for limiting the silicon steel to generate relative movement along the axial direction is arranged on the joint part; the rotor is arranged in the shell through an elastic connecting component;

the stator coil frame comprises an axial fixing structure, wherein the upper shell or the lower shell is provided with a clamping groove structure, and the axial fixing structure is clamped in the clamping groove structure;

the axial fixing structure comprises a fixing plate, the fixing plate is fixedly arranged at the end part of the silicon steel, and the fixing plate is clamped and inserted into the clamping groove structure.

2. The vibration motor of claim 1, wherein the anti-slip mechanism comprises a protrusion provided on one of the silicon steels and a recess provided on the other of the silicon steels, the protrusion being correspondingly fitted to the recess.

3. The vibration motor of claim 2, wherein the protrusion is formed in a semicircular shape or a triangular shape or a rectangular shape corresponding to the concave-convex fit formed by the fitting of the protrusion to the recess.

4. A vibration motor according to any one of claims 1 to 3, wherein the elastic connection assembly includes a spring piece, the housing is provided with a mounting groove, the spring piece is inserted into the mounting groove, and the rotor is connected to the housing through the spring piece.

5. The vibration motor of claim 4, wherein the elastic connection assembly further comprises a spacer disposed between the spring plate and the housing.

6. The vibration motor of claim 5, wherein the rotor includes a permanent magnet and a motor shaft connected, the spring piece includes a recess portion and an abutment portion, the motor shaft is mounted to the recess portion, the abutment portion is connected to the housing, and a thickness of the spring piece is adjustably set.

7. An electric device comprising a circuit structure and the vibration motor according to any one of claims 1 to 6, the vibration motor being electrically connected to the circuit structure.