CN109951043B

CN109951043B - Vibration motor

Info

Publication number: CN109951043B
Application number: CN201810021306.3A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Sichuan Awa Seimitsu Electric Co ltd
Current assignee: Sichuan Awa Seimitsu Electric Co ltd
Priority date: 2017-12-21
Filing date: 2018-01-10
Publication date: 2024-03-26
Anticipated expiration: 2038-01-10
Also published as: CN208479444U; CN109951043A

Abstract

The utility model provides a vibrating motor, includes shell, support, stator module and vibrating module, wherein stator module with vibrating module set up in the headspace between shell and the support, vibrating module includes mass block, magnet and two J-shaped elastic element, stator module includes the coil, the major axis of magnet and coil all with the major axis of shell is parallel, two J-shaped elastic element's one end with mass block fixed connection, the other end with shell inside wall fixed connection, the drive power direction of motor with the major axis of shell is perpendicular. Therefore, the invention can realize 3D vibration effect, meets the vibration requirement of the current game software, and has better VR experience effect for users.

Description

Vibration motor

Technical Field

The invention belongs to the field of miniature vibration motors, and particularly relates to a vibration motor.

Background

In the current market, the mobile consumer electronic products generally use a vibration motor as a system feedback component, such as an incoming call prompt of a mobile phone, vibration feedback of a game machine and the like. The prior vibrating motor comprises a shell, a support, a stator assembly and a vibrating assembly, wherein the stator assembly and the vibrating assembly are arranged in a reserved space between the shell and the support, the vibrating assembly comprises a mass block, a magnet and two elastic elements, the elastic elements are in a C shape with a short bending length and a long elastic arm, the mass block, the magnet and the shell are fixed through the two C-shaped elastic elements, the stator assembly comprises a coil, the long axes of the magnet and the coil are perpendicular to the long axis of the shell, and the driving force of the motor is parallel to the long axis of the shell. Because the long axes of the magnet and the coil in the motor are perpendicular to the long axis of the shell, the lengths of the coil and the magnet are limited by the dimension of the short axis direction of the shell, and according to the lorentz force formula f=BIL, wherein B is magnetic induction intensity, I is the current magnitude in the coil, and L is the length of a wire in the coil, the driving force of the motor is limited, and when the vibrating motor vibrates, only one vibration mode is formed in a plane parallel to the bottom surface of the bracket, only two-dimensional unidirectional vibration can be realized, so that the requirement of a user on the vibration capability of an electronic product in daily use and running a game cannot be met.

Disclosure of Invention

The invention aims to provide a motor which has a simple structure, is convenient to use, has double vibration modes and XY plane vibration directions and can realize a 3D vibration effect.

In order to achieve the technical purpose, the following technical scheme is used:

the utility model provides a vibrating motor, includes shell, support, stator module and vibrating module, wherein the stator module with vibrating module sets up in the reserved space between shell and support, vibrating module includes quality piece, magnet and two J-shaped elastic element, the stator module include the coil, with the flexible printed circuit board that the coil is connected, flexible printed circuit board switch on external power supply's one end extends to shell and support outside, flexible printed circuit board is two, sets up respectively the internal surface of shell and support, every flexible printed circuit board connects a coil respectively, just two flexible printed circuit board switch on external power supply's one end is extending after the shell and support are outside electric connection together, the major axis of magnet and coil all with the major axis of shell, two J-shaped elastic element's one end with quality piece fixed connection, the other end with shell inside wall fixed connection, the driving force direction of motor with the major axis of shell is perpendicular, J-shaped elastic element is close to its and is in the shell length of quality piece fixed connection end and the inside wall length of its being close to the two and is the vibration mode of forming the vibration mode and can be parallel to each other at the vibration mode of 1.0.1 and the vibration mode is than the vibration mode setting up in the two vibration mode of forming the vibration mode of force arm length to be parallel to the bottom surface of the support is 1:1.8-2.2.

Preferably, the mass block is in an I shape, the magnet is in a strip shape, and the magnet is arranged in an I-shaped groove of the mass block.

Preferably, the upper cover plate of the housing and the bracket are made of magnetically permeable material.

Preferably, the magnet is provided with a buffer material on a surface facing the inner side wall of the housing.

Preferably, metal sheets are respectively arranged at two end parts of the two J-shaped elastic elements.

Drawings

Fig. 1 is a schematic structural view of a vibration motor of the present invention.

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

Reference numerals: 1-mass block, 2-J-shaped elastic element, 3-coil, 4-magnet, 5-shell, 6-bracket, 7-buffer material and 8-metal sheet.

Detailed Description

A linear vibration motor according to the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, a vibration motor includes a housing 5, a bracket 6, a stator assembly and a vibration assembly, wherein the stator assembly and the vibration assembly are disposed in a reserved space between the housing 5 and the bracket 6, the vibration assembly includes a mass block 1, a magnet 4 and two J-shaped elastic elements 2, the mass block 1 can be made of steel or tungsten alloy and can be in an i-shape, the magnet 4 can be in a strip shape, and the strip-shaped magnet 4 can be disposed in an i-shaped groove of the i-shaped mass block 1, so that the magnet 4 can be prevented from protruding from the mass block 1, and the volume of the vibration assembly is reduced. The stator assembly comprises a coil 3, the long axes of a magnet 4 and the coil 3 are parallel to the long axis of the shell 5, one end of each J-shaped elastic element 2 is fixedly connected with the mass block 1, and the other end of each J-shaped elastic element is fixedly connected with the inner side wall of the shell 5. Since in this embodiment two J-shaped elastic elements 2 are used and the driving force direction of the motor is arranged perpendicular to the long axis of the housing 5, two mutually perpendicular vibration modes can be formed in a plane parallel to the bottom surface of the bracket 6 during vibration, and an angle can be formed between the vibration direction and the driving force direction of the motor. According to the lorentz force formula f=bil, wherein B is magnetic induction intensity, I is current magnitude in the coil, and L is length of a wire in the coil, in this embodiment, since long axes of the magnet 4 and the coil 3 are parallel to long axes of the housing 5, length of the wire in the coil can be significantly increased, and driving force of the motor is effectively improved. In addition, because the invention can form two mutually perpendicular vibration modes when in vibration, and the vibration direction and the motor driving force direction can form an included angle, the driving force of the motor is respectively projected to the two vibration directions, so that the two vibration directions can be considered to be respectively provided with an independent linear motor, thereby the invention can realize 3D vibration effect, meets the vibration requirement of the current game software, and has better VR experience effect for users. In order to achieve the best vibration effect, the ratio of the arm length L1 of the J-shaped elastic element 2 near the end fixedly connected with the mass block 1 to the arm length L2 near the end fixedly connected with the inner side wall of the shell 5 can be set to be 0.7-1.3; when vibrating, the frequency ratio of two mutually perpendicular vibration modes can be set at 1:1.8-2.2, for example, the vibration force at the mode 1 frequency is dominant when the vibration frequency is 50Hz-240Hz, and the vibration force at the mode 2 frequency is dominant when the vibration frequency is 240Hz-400 Hz; and an included angle formed between the vibration direction and the motor driving force direction in a plane parallel to the bottom surface of the bracket may be set to 30-60 degrees. Also, the upper cover plate of the housing 5 and the bracket 6 may be made of a magnetically conductive material, thereby preventing leakage of magnetic flux and further enhancing the driving force of the motor.

Example two

As shown in fig. 1 and 2, in a vibration motor as in embodiment one, a buffer material 7 may be further disposed on a surface of the magnet 5 facing the inner sidewall of the housing 5, and the buffer material 7 may be silica gel or foam, so as to prevent the magnet 4 from directly colliding with the housing 5 when the motor vibrates or accidents occur, thereby causing damage to the magnet 4 or the housing 5 and further prolonging the service life of the motor. In this embodiment, metal sheets 8 may be disposed at two end portions of the J-shaped elastic element, where the metal sheets 8 play a role of reinforcing ribs, so that welding points of the elastic element may not be bent during the vibration process. In addition, in this embodiment, the coil 3 is connected to flexible printed circuit boards, one end of which is connected to an external power source is extended to the outside of the housing 5 and the bracket 6, the number of flexible printed circuit boards may be two, the two flexible printed circuit boards are respectively provided on the inner surfaces of the housing 5 and the bracket 6, each of the flexible printed circuit boards may be connected to one coil 3, and one end of the two flexible printed circuit boards connected to an external power source is electrically connected together after being extended out of the housing 5 and the bracket 6.

The above-described embodiments are merely examples for clearly illustrating the present invention, and the present invention is not limited to the above-described embodiments. Other variations or modifications of the above description will be apparent to those of ordinary skill in the art, and are intended to be within the scope of the invention.

Claims

1. The utility model provides a vibrating motor, includes shell, support, stator module and vibration subassembly, wherein the stator module with vibration subassembly set up in the headspace between shell and the support, its characterized in that: the vibration subassembly includes mass, magnet and two J-shaped elastic element, the stator subassembly include the coil, with the flexible printed circuit board that the coil is connected, flexible printed circuit board switch on external power supply's one end extend to shell and support outside, flexible printed circuit board is two, sets up respectively the internal surface of shell and support, every flexible printed circuit board connects a coil respectively, just two flexible printed circuit board switch on external power supply's one end is in the same place after extending outside shell and support, the major axis of magnet and coil all with the major axis of shell is parallel, two J-shaped elastic element's one end with mass fixed connection, the other end with shell inside wall fixed connection, the driving force direction of motor with the major axis of shell is perpendicular, J-shaped elastic element is close to its arm length with mass block fixed connection end and be close to its ratio of the arm length of shell inside wall fixed connection end be 0.7-1.3, when vibrating, in the plane parallel with the support bottom surface can form two mutually perpendicular modes of vibration mode, can form two mutual modes of vibration mode and form the direction of vibration mode, can form the contained angle of vibration mode is set up at two perpendicular modes of force modes of vibration mode 1, the vibration mode is perpendicular to each other is set up at two perpendicular directions of vibration mode 1:1.8-2.2.

2. A vibration motor as claimed in claim 1, wherein: the mass block is I-shaped, the magnet is strip-shaped, and the magnet is arranged in the I-shaped groove of the mass block.

3. A vibration motor as claimed in claim 1, wherein: the upper cover plate of the shell and the bracket are made of magnetic conductive materials.

4. A vibration motor as claimed in claim 1, wherein: the magnet is provided with a buffer material on the surface facing the inner side wall of the shell.

5. A vibration motor as claimed in claim 1, wherein: and metal sheets are respectively arranged at the two end parts of the two J-shaped elastic elements.