CN211830533U

CN211830533U - Vibration motor and electronic terminal

Info

Publication number: CN211830533U
Application number: CN202020807530.8U
Authority: CN
Inventors: 张成飞; 毛东升; 高文花
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-10-30
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a vibrating motor and electronic terminal, wherein, vibrating motor includes: a housing; the vibrator assembly comprises a mass block arranged in a frame shape, a magnet assembly fixedly arranged in the mass block and two magnetic conduction plates respectively covering two opposite ends of the mass block; the vibrator assembly is provided with a avoidance hole; the stator assembly comprises a coil assembly arranged corresponding to the magnet assembly, and at least part of the coil assembly is positioned in the mass block and is fixedly connected with the shell through the avoidance hole; and the elastic connecting piece is connected between the mass block and the shell. The technical scheme of the utility model can reduce vibrating motor's magnetic leakage among the electronic terminal.

Description

Vibration motor and electronic terminal

Technical Field

The utility model relates to a vibrating motor technical field, in particular to vibrating motor and electronic terminal.

Background

For electronic terminals such as mobile phones, tablet computers, handheld game consoles, navigation devices, etc., a vibration motor is usually arranged inside the electronic terminal to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, and other possible prompts. However, other devices with magnets (such as a speaker and the like) and magnetically sensitive devices (such as an antenna and the like) are usually arranged inside the electronic terminals, and if the vibration motor leaks magnetic flux, the magnetic flux can affect the other devices with magnets and the magnetically sensitive devices.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a vibrating motor aims at reducing vibrating motor's among the electronic terminal magnetic leakage.

In order to achieve the above object, the present invention provides a vibration motor including:

a housing;

the vibrator assembly comprises a mass block arranged in a frame shape, a magnet assembly fixedly arranged in the mass block and two magnetic conduction plates respectively covering two opposite ends of the mass block; the vibrator assembly is provided with a avoidance hole;

the stator assembly comprises a coil assembly arranged corresponding to the magnet assembly, and at least part of the coil assembly is positioned in the mass block and is fixedly connected with the shell through the avoidance hole; and

and the elastic connecting piece is connected between the mass block and the shell.

Optionally, the stator assembly further includes a bridging bracket, one end of the bridging bracket is fixedly connected to the housing, and the other end of the bridging bracket passes through the avoiding hole and is fixedly connected to the coil assembly.

Optionally, the coil assembly passes through the avoidance hole and is fixedly connected with the housing.

Optionally, the avoiding hole is formed in the mass block or the magnetic conduction plate.

Optionally, the magnet assembly includes two magnet groups disposed oppositely and at an interval, and the coil assembly is disposed between the two magnet groups.

Optionally, the magnet assembly comprises four magnet sets, of which two are opposed and spaced in a first direction and two are opposed and spaced in a second direction; the first direction is orthogonal to the second direction;

the inner side of each magnet group is correspondingly provided with one coil assembly.

Optionally, the magnet assembly includes three permanent magnets stacked one on another, the magnetizing direction of the permanent magnet located in the middle is parallel to the vibration direction, the magnetizing directions of the permanent magnets located at the two ends are perpendicular to the vibration direction, and the polarities of the two adjacent ends of the permanent magnets located at the two ends are the same.

Optionally, the coil assembly includes an iron core and a coil wound around the iron core;

for the coil assemblies inside the four magnet groups, the cores of the coil assemblies are connected to each other in a cross shape.

Optionally, the elastic connecting piece is provided as a spring piece.

Optionally, the housing is provided as a non-magnetic shell.

The utility model discloses still provide an electronic terminal, including aforementioned vibrating motor.

The technical scheme of the utility model, the quality piece is the frame form, and all be located the quality piece with the main part of magnet subassembly interact on magnet subassembly and the coil pack at least, and all cover the magnetic conduction board at the relative both ends of frame form quality piece, so, accessible magnetic conduction board carries out the magnetic screen to magnet subassembly and the coil pack part that is located the quality piece, thereby reduces vibrating motor's magnetic leakage, and then reduces the magnetic leakage and to other devices that have the magnet and the influence that the magnetic sensitive device led to the fact in the electron terminal of installing this vibrating motor.

Drawings

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

Fig. 1 is an exploded view of an embodiment of the vibration motor of the present invention;

FIG. 2 is a schematic cross-sectional view of the vibration motor of FIG. 1;

fig. 3 is an exploded view of a vibrator assembly and a coil assembly of another embodiment of the vibration motor of the present invention;

fig. 4 is a schematic structural view between a vibrator assembly and a coil assembly of the vibration motor of fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Outer casing	2	Vibrator assembly
21	Mass block	22	Magnet assembly
				221	Magnet assembly	221a	Permanent magnet
23	Magnetic conductive plate	31	Coil component
				311	Coil	312	Iron core
4	Elastic connecting piece

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a vibrating motor.

Referring to fig. 1 and 2, in an embodiment of the present invention, the vibration motor includes:

a housing 1;

the vibrator assembly 2 comprises a mass block 21 arranged in a frame shape, a magnet assembly 22 fixedly arranged in the mass block 21, and two magnetic conduction plates 23 respectively covering two opposite ends of the mass block 21; the vibrator component 2 is provided with a relief hole (not shown);

the stator assembly comprises a coil assembly 31 arranged corresponding to the magnet assembly 22, and the coil assembly 31 is at least partially positioned in the mass block 21 and is fixedly connected with the shell 1 through the avoidance hole; and

and the elastic connecting piece 4 is connected between the mass block 21 and the shell 1.

In this embodiment, the mass block 21 is in a rectangular frame shape. However, the design is not limited thereto, and in other embodiments, the mass block 21 may also be, but not limited to, a circular frame shape, a hexagonal frame shape, and the like.

In this embodiment, optionally, the elastic connecting member 4 is provided as an elastic sheet; the elastic sheet has simple structure, convenient preparation and lower cost. However, the design is not limited thereto, and in other embodiments, the elastic connecting element 4 may be configured as a spring.

In operation, the vibration motor of the present embodiment, an alternating current is applied to the coil assembly 31 to form a varying magnetic field in and around the coil assembly 31, which in turn drives the vibrator assembly 2 to vibrate.

The technical scheme of the utility model, quality piece 21 is the frame form, and all be located quality piece 21 with the main part of magnet subassembly 22 interact on magnet subassembly 22 and the coil pack 31 at least, and all cover magnetic conduction board 23 at the relative both ends of frame form quality piece 21, so, accessible magnetic conduction board 23 carries out the magnetic screen to magnet subassembly 22 and the coil pack 31 part that is located quality piece 21, thereby reduce vibrating motor's magnetic leakage, and then reduce the magnetic leakage and to other devices that have the magnet and the influence that the magnetism sensitive device led to the fact in the electron terminal of installing this vibrating motor.

In the present embodiment, further, the housing 1 is configured as a non-magnetic shell, that is, the housing 1 is made of a non-magnetic material; thus, compared with the technical scheme that the shell 1 is made of magnetic materials, in the technical scheme of the utility model, magnetic attraction perpendicular to the vibration direction no longer exists between the vibrator component 2 and the shell 1, so that noise generated by the vibration motor in the working process is avoided, and the service life of the elastic connecting piece 4 can be prolonged; in addition, since the non-magnetic material is generally cheaper, the cost of the housing 1 can be reduced, thereby reducing the cost of the product.

In this embodiment, the stator assembly further includes a bridge bracket (not shown), one end of the bridge bracket is fixedly connected to the housing 1, and the other end of the bridge bracket passes through the avoidance hole and is fixedly connected to the coil assembly 31; in this way, by providing all of the coil assembly 31 in the mass block 21, the entire coil assembly 31 can be magnetically shielded by the magnetic conductive plate 23, and the leakage flux of the vibration motor can be further reduced. It can be understood that, in this embodiment, the size of the avoiding hole is larger than the size of the corresponding portion on the bridging bracket, so as to avoid the bridging bracket from touching the hole wall of the avoiding hole when the relative displacement occurs between the vibration assembly and the housing 1, thereby avoiding the reduction of the vibration effect of the vibration motor.

In the present embodiment, the coil assembly 31 and the housing 1 are indirectly and fixedly connected by adding the bridge bracket. However, the design is not limited thereto, and in other embodiments, the coil assembly 31 may also pass through the avoiding hole and be directly and fixedly connected with the housing 1, so that no additional bridging member is required, and the connection cost is lower.

In addition, in the present embodiment, at least one wall of the housing 1 is optionally detachable, so as to facilitate the maintenance, disassembly, and replacement of the internal components (including the stator assembly and the vibrator assembly 2). Alternatively, the detachable wall connection may be, but is not limited to, a snap connection, a screw lock attachment connection, or the like. Further alternatively, the stator assembly is fixedly connected to a non-detachable wall of the housing 1 to facilitate the vibration effect.

In this embodiment, further, the avoiding hole is disposed on the mass block 21, so that the magnetic conducting plate 23 is not damaged, and the magnetic shielding effect of the magnetic conducting plate 23 on the magnet assembly 22 and the coil assembly 31 is better. However, the design is not limited thereto, and in other embodiments, the avoiding hole may be disposed on the magnetic conductive plate 23, so that the magnetic conductive plate 23 is generally thinner than the wall body of the mass block 21, and the avoiding hole is more convenient to open, and at the same time, the weight of the mass block 21 is not reduced.

Referring to fig. 1 and 2, in the present embodiment, further, the magnet assembly 22 includes two magnet sets 221 disposed oppositely and at an interval, and the coil assembly 31 is disposed between the two magnet sets 221. It can be appreciated that the coil assembly 31, in cooperation with the two magnet assemblies 221, can improve the electrical efficiency of the vibration motor.

In this embodiment, optionally, the magnet set 221 is a halbach magnet. Further optionally, the magnet assembly 221 includes three permanent magnets 221a stacked one on another, the magnetization direction of the permanent magnet 221a located in the middle is parallel to the vibration direction, the magnetization directions of the permanent magnets 221a located at both ends are perpendicular to the vibration direction, and the polarities of the adjacent two ends of the permanent magnets 221a located at both ends are the same, that is, the magnetization directions of the permanent magnets 221a located at both ends are opposite; therefore, the vibration driving force is large, and the vibration starting speed is high; it should be noted that "the magnetizing directions of the permanent magnets 221a located in the middle portion are toward the coil assembly 31, and the magnetizing directions of the permanent magnets 221a located at the two ends are set toward each other" shown in fig. 2 is only one embodiment of the middle magnet 221 of the present invention, and the present design is not limited thereto. Of course, the permanent magnets 221a of the magnet assembly 221 are not limited to three, and may be more.

Referring to fig. 3, fig. 3 is an exploded view of the vibrator assembly 2 and the coil assembly 31 according to another embodiment of the vibration motor of the present invention. This further embodiment differs from the previous embodiment only in that the magnet assembly 22 comprises four magnet groups 221. Referring also to fig. 4, for the four magnet groups 221, two of the magnet groups 221 are opposite and spaced apart in a first direction, and the other two magnet groups 221 are opposite and spaced apart in a second direction; wherein the first direction is orthogonal to the second direction. And a coil assembly 31 is correspondingly disposed on the inner side of each magnet set 221. In this embodiment, the magnet assembly 221 is a halbach magnet, further optionally, the magnet assembly 221 includes three permanent magnets 221a stacked in a mutually, the magnetization direction of the permanent magnet 221a located in the middle is parallel to the vibration direction, the magnetization directions of the permanent magnets 221a located at the two ends are perpendicular to the vibration direction, and the polarities of the two adjacent ends of the permanent magnets 221a located at the two ends are the same, that is, the magnetization directions of the permanent magnets 221a located at the two ends are opposite; therefore, the vibration driving force is large, and the vibration starting speed is high; it should be noted that "the magnetizing directions of the permanent magnets 221a located in the middle portion are toward the coil assembly 31, and the magnetizing directions of the permanent magnets 221a located at the two ends are set toward each other" shown in fig. 2 is only one embodiment of the middle magnet 221 of the present invention, and the present design is not limited thereto. Of course, the permanent magnets 221a of the magnet assembly 221 are not limited to three, and may be more. In the present embodiment, when the vibration motor is operated, if only the two coil assemblies 31 in the first direction are energized, the electromagnetic force in the first direction can be generated; if only two coil assemblies 31 in the second direction are energized, electromagnetic force in the second direction can be generated; if the four coil assemblies 31 in the two directions are simultaneously energized, electromagnetic forces in other directions different from the first direction and the second direction can be generated; therefore, the vibration motor of the embodiment can select the different energization modes according to requirements to obtain vibrations in different directions, so as to meet more vibration requirements.

Without loss of generality, the coil assembly 31 includes a core 312 and a coil 311 wound around the core 312. In the present embodiment, further, for the coil assemblies 31 inside the four magnet groups 221, the iron cores 312 of the respective coil assemblies 31 are connected to each other in a cross shape; so, can connect as an organic whole with all coil pack 31 to only need set up a bridging support or only need one of them coil pack 31 to pass dodge hole and shell 1 fixed connection, just can realize the fixed connection between all coil packs 31 and the shell 1, be favorable to simplifying the overall structure of product, improve assembly efficiency, reduce assembly cost.

The utility model discloses still provide an electronic terminal, this electronic terminal includes vibrating motor, and this vibrating motor's concrete structure refers to above-mentioned embodiment, because this electronic terminal has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The utility model discloses in, electronic terminal can be but not limited to cell-phone, panel computer, palm game machine, navigation etc. and these products generally all can use vibrating motor to do system feedback, for example incoming telegram suggestion, information prompt, navigation suggestion and other possible prompts etc..

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vibration motor, comprising:

a housing;

2. A vibration motor as claimed in claim 1, wherein said stator assembly further comprises a bridge bracket, one end of said bridge bracket being fixedly connected to said housing and the other end thereof passing through said avoiding hole and being fixedly connected to said coil assembly.

3. The vibration motor of claim 1, wherein the coil assembly passes through the avoiding hole and is fixedly connected to the housing.

4. A vibration motor as claimed in claim 1, wherein said avoiding hole is provided in said mass block or said magnetic conductive plate.

5. A vibratory motor as set forth in claim 1 wherein said magnet assembly includes two magnet sets disposed in opposed spaced relation with said coil assembly disposed between said magnet sets.

6. A vibratory motor as set forth in claim 1 wherein said magnet assembly includes four magnet sets, two of which are opposed and spaced in a first direction and two of which are opposed and spaced in a second direction; the first direction is orthogonal to the second direction;

7. A vibration motor according to claim 5 or 6, wherein said magnet assembly includes three permanent magnets stacked one on another, the magnetization direction of the permanent magnet at the middle portion is parallel to the vibration direction, the magnetization directions of the permanent magnets at both ends are perpendicular to the vibration direction, and the polarities of the adjacent ends of the permanent magnets at both ends are the same.

8. A vibration motor according to claim 6, wherein said coil block includes an iron core, and a coil wound around said iron core;

9. A vibration motor as claimed in claim 1, wherein said elastic connecting member is provided as a spring plate.

10. A vibration motor as claimed in claim 1, wherein said housing is provided as a non-magnetic conductive case.

11. An electronic terminal characterized by comprising the vibration motor according to any one of claims 1 to 10.