CN215300452U

CN215300452U - Linear vibration motor

Info

Publication number: CN215300452U
Application number: CN202120663175.6U
Authority: CN
Inventors: 崔志勇; 王尧; 李子昂
Original assignee: AAC Microtech Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-12-24
Anticipated expiration: 2031-03-31

Abstract

The utility model provides a linear vibration motor, its including have accommodating space the base, set up in vibration unit in the accommodating space, general vibration unit suspension in elastic component in the accommodating space, be fixed in base and drive the coil pack of vibration unit vibration and set up in the outer supplementary magnet steel of base, the vibration unit includes the magnet steel, linear vibration motor still includes, supplementary magnet steel polarity and rather than adjacent the polarity of magnet steel is opposite, just supplementary magnet steel forms the magnetic circuit with this magnet steel jointly. Compared with the prior art, the utility model discloses a linear vibration motor's drive power is big and vibration performance is good.

Description

Linear vibration motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a motor especially relates to a linear vibrating motor of application in mobile electronic product field.

[ background of the invention ]

With the development of electronic technology, portable consumer electronic products, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, are more and more sought after by people, and these electronic products generally use linear vibration motors to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like. Such a wide application requires a vibration motor having excellent performance and a long service life.

The linear vibration motor of the related art comprises a base with an accommodating space, a vibration unit located in the accommodating space, an elastic part for fixing and suspending the vibration unit in the accommodating space and a coil assembly fixed on the base, wherein the vibration unit comprises a mass block, a pole core and magnetic steel, the coil assembly comprises a coil and an iron core, and a magnetic field generated by the coil interacts with a magnetic field generated by the vibration unit so as to drive the vibration unit to do reciprocating linear motion to generate vibration.

However, in the related art linear vibration motor, when the external magnetic field is arranged, the influence on the magnetic circuit in the motor is rarely considered, or the external magnetic field is irregularly arranged. Because the external magnetic field is irregularly placed, the stability of the internal magnetic field of the motor can be damaged, the driving performance of a magnetic circuit can be reduced, the intensity of the magnetic field is weakened, the vibration unit generates vibration to be weakened, and the vibration performance of the linear vibration motor is affected to be poor.

Therefore, it is necessary to provide a new linear vibration motor to solve the above problems.

[ Utility model ] content

An object of the utility model is to provide a drive power greatly and the good linear vibration motor of vibration performance.

In order to achieve the above object, the utility model provides a linear vibration motor, its including have accommodating space the base, set up in vibration unit in the accommodating space, general vibration unit suspension in elastic component in the accommodating space, be fixed in base and drive the coil pack of vibration unit vibration and set up in the outer supplementary magnet steel of base, vibration unit includes the magnet steel, supplementary magnet steel polarity and rather than adjacent the polarity of magnet steel is opposite, just supplementary magnet steel forms the magnetic circuit with this magnet steel jointly.

Preferably, the number of the magnetic steel is one, and the number of the auxiliary magnetic steel is one; the vibration unit further comprises two mass blocks, and the two mass blocks are fixedly arranged on two opposite sides of the magnetic steel.

Preferably, the auxiliary magnetic steel comprises two auxiliary magnetic steels, wherein the polarity of one auxiliary magnetic steel is opposite to that of the adjacent magnetic steel, and the magnetizing direction of the other auxiliary magnetic steel is perpendicular to that of the magnetic steel.

Preferably, the two magnetic steels are arranged on two opposite sides of the coil assembly at intervals respectively; the vibration unit further comprises two mass blocks, and the two mass blocks are arranged on the other two opposite sides of the coil assembly.

Preferably, the vibration unit further includes a pole core, the pole core includes two first side walls disposed at an interval and two second side walls disposed at an interval, each of the magnetic steels is fixed to one of the first side walls adjacent thereto, and each of the mass blocks is fixed to one of the second side walls adjacent thereto.

Preferably, the pole core is of a rectangular structure, wherein the magnetizing direction of one of the auxiliary magnetic steels is parallel to the first side wall, and the magnetizing direction of the other auxiliary magnetic steel is parallel to the second side wall.

Preferably, the auxiliary magnetic steel comprises a plurality of auxiliary magnetic steels which are arranged at intervals and in an array, and each auxiliary magnetic steel and the magnetic steel form a magnetic loop together.

Preferably, the base includes the upper cover and with the upper cover is fixed to be formed accommodating space's bottom plate, coil pack include with the iron core that the magnet steel interval set up with around locating the coil of iron core, the iron core is fixed in the bottom plate.

Preferably, the mass is made of a non-magnetically conductive material.

Compared with the prior art, the utility model discloses a linear vibration motor passes through the base and sets up supplementary magnet steel outward to the direction of magnetizing of supplementary magnet steel is opposite with the direction of magnetizing of adjacent magnet steel, and makes supplementary magnet steel with the magnet steel forms the magnetic circuit jointly. The structure enlarges the circulation of magnetic force lines, improves the magnetic field intensity and increases the magnetic induction intensity, and the magnetic flux is correspondingly improved, so that the linear vibration motor has good vibration performance.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and 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 without inventive work, wherein:

fig. 1 is a three-dimensional structural view of a linear vibration motor according to the present invention;

fig. 2 is an exploded view of a part of a three-dimensional structure of the linear vibration motor of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 1;

fig. 4 is a schematic structural view of the linear vibration motor of the present invention with the base removed;

fig. 5 is a perspective view showing another embodiment of the linear vibration motor of the present invention;

fig. 6 is an exploded view of a partial perspective structure of the linear vibration motor of fig. 5.

[ detailed description ] embodiments

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.

Referring to fig. 1-4, the present invention provides a linear vibration motor 100 including a base 1, an elastic member, a vibration unit 2, a coil assembly 3 and an auxiliary magnetic steel 4.

The base 1 has a receiving space 10. The base 1 includes an upper cover 11 and a bottom plate 12 fixed to the upper cover 11 to form the receiving space 10.

The elastic member is fixed to the base 1. The elastic member suspends the vibration unit 2 in the housing space 10.

The vibration unit 2 is suspended in the housing space 10. The vibration unit 2 may be suspended in the housing space 10 by the elastic member support.

Specifically, the vibration unit 2 includes a magnetic steel 21, a mass 22, and a pole core 23.

In this embodiment, the magnetic steel 21 includes two pieces. The two magnetic steels 21 are respectively arranged at two opposite sides of the coil assembly 3 at intervals.

The mass 22 includes two. Two of the masses 22 are disposed on opposite sides of the coil assembly 3. Wherein the mass 22 is made of a non-magnetic material.

The pole piece 23 includes two first sidewalls 231 disposed at an opposite interval and two second sidewalls 232 disposed at an opposite interval. Each of the magnetic steels 21 is fixed to one of the first side walls 231 adjacent to the magnetic steel, and each of the masses 22 is fixed to one of the second side walls 232 adjacent to the magnetic steel. The structure of the pole core 23 enhances the magnetic field of the magnetic steel 21 in the accommodating space 10, which is beneficial to improving the vibration performance of the linear vibration motor 100.

The coil assembly 3 is fixed to the base 1 and drives the vibration unit 2 to vibrate.

Specifically, the coil assembly 3 includes an iron core 31 disposed at an interval with the magnetic steel 21 and a coil 32 wound on the iron core 31. Wherein the iron core 31 is fixed to the base plate 12.

The auxiliary magnetic steel 4 is arranged outside the base 1.

In this embodiment, the auxiliary magnetic steel 4 is spaced apart from the base 1.

The polarity of the auxiliary magnetic steel 4 is opposite to that of the adjacent magnetic steel 21, and the auxiliary magnetic steel 4 and the magnetic steel 21 form a magnetic loop together. The magnetizing direction of the auxiliary magnetic steel 4 is parallel to the magnetizing direction of the adjacent magnetic steel 21. In the present embodiment, as shown in fig. 4, the inner side of one of the magnetic steels 21 adjacent to the auxiliary magnetic steel 4 is an N pole, and the outer side thereof is an S pole; and the inner side of one auxiliary magnetic steel 4 adjacent to the magnetic steel 21 is an N pole, and the outer side is an S pole. The structure of the auxiliary magnetic steel 4 enlarges the circulation of magnetic lines of force, improves the magnetic field intensity, increases the magnetic induction intensity, and correspondingly improves the magnetic flux, so that the linear vibration motor 100 has good vibration performance.

The number and shape of the auxiliary magnetic steel 4 can be set according to the external environment of the base 1. In this embodiment, the auxiliary magnetic steels 4 include two pieces. The polarity of one of the auxiliary magnetic steels 4 is opposite to that of the adjacent one of the magnetic steels 21, and the magnetizing direction of the other auxiliary magnetic steel 4 is perpendicular to that of the magnetic steel 21.

In order to better dispose the auxiliary magnetic steel 4 in the position and direction of the accommodating space 10. In the present embodiment, the pole core 23 has a rectangular structure. The magnetizing direction of one of the auxiliary magnetic steels 4 is parallel to the first side wall 231, and the magnetizing direction of the other auxiliary magnetic steel 4 is parallel to the second side wall 232.

Of course, in another embodiment, it is also possible to provide one auxiliary magnetic steel 4. Referring to fig. 5-6, a linear vibration motor 200 is also provided. In the linear vibration motor 200, there is one auxiliary magnetic steel 4 b.

In the present embodiment, there is one magnetic steel 21 b. The mass 22b of the vibration unit 2b includes two. The two mass blocks 22b are fixedly arranged on two opposite sides of the magnetic steel 21 b. The structure of one auxiliary magnetic steel 4b enlarges the circulation of magnetic lines of force, and improves the magnetic field strength and increases the magnetic induction intensity, and the magnetic flux is correspondingly improved, so that the linear vibration motor 200 has good vibration performance.

Of course, in other embodiments, the auxiliary magnetic steel 4 further includes a plurality of auxiliary magnetic steels. A plurality of the auxiliary magnetic steels 4 are arranged at intervals in an array. Each auxiliary magnetic steel 4 and the magnetic steel 21 form a magnetic loop together. A plurality of the structures of the auxiliary magnetic steel 4 increase the magnetic field intensity of the auxiliary magnetic steel 4, and the magnetic flux is correspondingly improved, so that the vibration performance of the linear vibration motor is good.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The utility model provides a linear vibration motor, its including have accommodating space the base, set up in vibration unit in the accommodating space, will vibration unit suspension in elastic component in the accommodating space and be fixed in base and drive the coil pack of vibration unit vibration, vibration unit includes the magnet steel, a serial communication port, linear vibration motor still including set up in the outer supplementary magnet steel of base, the polarity of supplementary magnet steel with rather than adjacent the polarity of magnet steel is opposite, just supplementary magnet steel forms magnetic circuit with this magnet steel jointly.

2. The linear vibration motor of claim 1, wherein the magnetic steel is one, and the auxiliary magnetic steel is one; the vibration unit further comprises two mass blocks, and the two mass blocks are fixedly arranged on two opposite sides of the magnetic steel.

3. The linear vibration motor according to claim 1, wherein the auxiliary magnetic steel includes two auxiliary magnetic steels, a polarity of one of the auxiliary magnetic steels is opposite to a polarity of an adjacent one of the magnetic steels, and a magnetizing direction of the other auxiliary magnetic steel is perpendicular to a magnetizing direction of the magnetic steel.

4. The linear vibration motor of claim 3, wherein the magnetic steel comprises two magnetic steels, and the two magnetic steels are respectively arranged at two opposite sides of the coil assembly at intervals; the vibration unit further comprises two mass blocks, and the two mass blocks are arranged on the other two opposite sides of the coil assembly.

5. The linear vibration motor of claim 4, wherein the vibration unit further includes a pole core, the pole core includes two first sidewalls disposed at an interval and two second sidewalls disposed at an interval, each of the magnetic steels is fixed to one of the first sidewalls adjacent thereto, and each of the mass blocks is fixed to one of the second sidewalls adjacent thereto.

6. The linear vibration motor of claim 5, wherein the pole core has a rectangular structure, and a magnetization direction of one of the auxiliary magnetic steels is parallel to the first side wall, and a magnetization direction of the other auxiliary magnetic steel is parallel to the second side wall.

7. The linear vibration motor of claim 1, wherein the auxiliary magnetic steel comprises a plurality of auxiliary magnetic steels, the plurality of auxiliary magnetic steels are spaced from each other and arranged in an array, and each auxiliary magnetic steel and the magnetic steel form a magnetic loop together.

8. The linear vibration motor of claim 1, wherein the base includes an upper cover and a bottom plate fixed to the upper cover to form the receiving space, the coil assembly includes an iron core spaced apart from the magnetic steel and a coil wound around the iron core, and the iron core is fixed to the bottom plate.

9. The linear vibration motor of claim 2, wherein the mass is made of a non-magnetic conductive material.