Vibration motor and electronic device

Abstract

The present invention provides a vibration motor and an electronic device. The vibration motor includes a housing having a first accommodating chamber, a stator solenoid accommodated in the first accommodating chamber and fixed to the housing, an oscillator suspended in the first accommodating chamber, and an elastic connecting member connecting the oscillator and the housing. The oscillator includes a mass block and a magnetic circuit assembly fixed to the mass block. The oscillator vibrates along a first vibration direction and a second vibration direction, and the magnetic circuit assembly is obliquely magnetized. The elastic connecting member includes a first elastic connecting member and a second elastic connecting member connected to each other. The first elastic connecting member extends along the first vibration direction and is fixed to the mass block, and the second elastic connecting member extends along the second vibration direction and is fixed to the inner wall of the housing. The vibration motor of the present invention can realize the vibration function of the vibration motor in two directions of the first vibration direction and the second vibration direction, and can ensure that the stress of the whole elastic connecting member meets the reliability requirements, and the stiffness design is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a vibration motor and an electronic device. Background Art

[0002] A vibration motor is one of the important components of an electronic device and is usually used for system feedback of the electronic device, such as incoming call prompts, message prompts, navigation prompts of a mobile phone, vibration feedback of a game console, etc. However, the vibration motors in the prior art generally only receive driving forces in a single direction, resulting in the vibration motors being able to generate a sense of vibration only in a single direction.

[0003] Therefore, it is necessary to provide a vibration motor and an electronic device with a multi-directional vibration mode. Summary of the Invention

[0004] The purpose of the present invention is to provide a vibration motor and an electronic device, where the vibration motor has a multi-directional vibration mode and can achieve bidirectional vibration in two directions, namely a first vibration direction and a second vibration direction.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a vibration motor, including a housing having a first accommodation chamber, a stator solenoid housed in the first accommodation chamber and fixed to the housing, an oscillator suspended in the first accommodation chamber, and an elastic connecting member connecting the oscillator and the housing. The oscillator includes a mass block and a magnetic circuit assembly fixed to the mass block. The oscillator vibrates in a first vibration direction and a second vibration direction perpendicular to the first vibration direction. The magnetic circuit assembly is obliquely magnetized and the magnetization direction is parallel to the XZ plane. The elastic connecting member includes a first elastic connecting member and a second elastic connecting member connected to each other. The first elastic connecting member extends along the first vibration direction and is fixed to the mass block. The second elastic connecting member extends along the second vibration direction and is fixed to the inner wall of the housing. Wherein, the XZ plane refers to a plane parallel to the plane formed by the first vibration direction and the second vibration direction.

[0007] Optionally, the mass block of the oscillator suspended in the first accommodation chamber has a hollow structure with a second accommodation chamber. The mass block includes two X-direction end faces perpendicular to the first vibration direction and opposite to each other, and two Z-direction end faces perpendicular to the second vibration direction and opposite to each other. The number of the first elastic connecting members is two and they are respectively connected to the two Z-direction end faces. The number of the second elastic connecting members is two and they are respectively arranged at intervals with the two X-direction end faces. Each first elastic connecting member is in series connection with the two second elastic connecting members.

[0008] Optionally, first connection blocks protruding away from the mass block and extending are provided on both of the Z-direction end faces and are respectively connected to the two first elastic connectors; second connection blocks connected to the second elastic connectors are provided on the inner walls of the housing opposite to the two second elastic connectors.

[0009] Optionally, the two first elastic connectors include a first fixing part fixedly connected to the first connection block and first deformation parts symmetrically connected to both X-direction ends of the first fixing part; the two second elastic connectors include a second fixing part fixedly connected to the second connection block and second deformation parts symmetrically connected to both Z-direction ends of the second fixing part.

[0010] Optionally, Kx of the first elastic connector is greater than Kz, and Kz of the second elastic connector is greater than Kx; wherein, Kx refers to the elastic coefficient component of the elastic connector along the first vibration direction, and Kz refers to the elastic coefficient component of the elastic connector along the second vibration direction.

[0011] Optionally, the magnetic circuit assembly includes a first pole core and a second pole core that are parallel to the XZ plane and are respectively fixed to opposite inner walls of the mass block, a first magnet fixed to the first pole core, and a second magnet fixed to the second pole core and facing the first magnet, and the polarities of the opposite magnetic poles of the first magnet and the second magnet are the same.

[0012] Optionally, the stator solenoid includes an iron core, two pole shoes respectively fixed to both ends of the iron core, and a coil wound around the surface of the iron core and located between the two pole shoes, and the two pole shoes are fixed to the bottom wall of the housing and are respectively arranged at intervals opposite to the first magnet and the second magnet.

[0013] Optionally, both the first elastic connector and the second elastic connector are planar springs.

[0014] Optionally, the elastic connector is obtained by separately forming the first elastic connector and the second elastic connector and then assembling and connecting them.

[0015] On the other hand, the present invention provides an electronic device, which includes the vibration motor described in any one of the above.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention provides a vibration motor and an electronic device. The vibration motor includes elastic connectors respectively connected to the vibrator and the housing. The elastic connectors include a first elastic connector and a second elastic connector connected to each other. The first elastic connector and the second elastic connector are respectively arranged along the first vibration direction and the second vibration direction and are connected in series with each other. The first elastic connector and the second elastic connector are respectively connected to the mass block and the housing, providing a structural basis for the bidirectional vibration mode of the vibration motor in the first vibration direction and the second vibration direction, while ensuring that the stress of the overall elastic connector meets the reliability requirements and the stiffness design is simple; the vibrator includes a magnet with two sections of oblique magnetization, and the magnet can provide vibration driving forces for the vibrator in the first vibration direction and the second vibration direction, thereby providing a power basis for the vibration motor to achieve bidirectional vibration in the first vibration direction and the second vibration direction, realizing the vibration function of the vibration motor in two directions of the first vibration direction and the second vibration direction, and providing a hardware basis for the diversity of vibration signals applied by the vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is an exploded view of the vibration motor of the present invention.

[0019] Figure 2 FIG. is a top view of the vibration motor of the present invention.

[0020] Figure 3 is Figure 2 a cross-sectional view taken along A-A.

[0021] Figure 4 is Figure 2 a cross-sectional view taken along B-B.

[0022] Figure 5 is a schematic diagram of the magnetic distribution of the magnetization of the magnet in the magnetic circuit assembly.

[0023] Figure 6 is an assembly diagram of the elastic connector.

[0024] Figure 7 is an assembly diagram of the elastic connector and the vibrator.

[0025] Figure 8 is a structural diagram of the elastic connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described below in conjunction with the drawings and embodiments.

[0027] The present invention provides a vibration motor. Refer to Figures 1 to 6As shown in the figure, it includes a housing 1 having a first accommodation chamber 11, a stator solenoid 4 housed in the first accommodation chamber 11 and fixed to the housing 1, an oscillator 2 suspended in the first accommodation chamber 11, and an elastic connecting member 3 connecting the oscillator 2 and the housing 1. The oscillator 2 includes a mass block 22 and a magnetic circuit assembly 21 fixed to the mass block 22. The oscillator 2 vibrates along a first vibration direction X and a second vibration direction Z perpendicular to the first vibration direction X. The magnetic circuit assembly 21 is obliquely magnetized and the magnetization direction is parallel to the XZ plane. The elastic connecting member 3 includes a first elastic connecting member 31 and a second elastic connecting member 32 connected to each other. The first elastic connecting member 31 extends along the first vibration direction X and is fixed to the mass block 22. The second elastic connecting member 32 extends along the second vibration direction Z and is fixed to the inner wall of the housing 1. Wherein, the XZ plane refers to a plane parallel to the plane formed by the first vibration direction X and the second vibration direction Z.

[0028] It should be noted that in the present invention, the first vibration direction refers to a direction parallel to the X direction in the space coordinate system, and the second vibration direction refers to a direction parallel to the Z direction in the space coordinate system. The direction inside refers to the direction close to the center of the housing 1, and the direction outside refers to the direction away from the center of the housing 1. The corresponding XZ plane refers to a plane parallel to the plane formed by the X axis and the Z axis in the space coordinate system.

[0029] The vibration motor of the present invention includes an elastic connecting member 3 respectively connected to the oscillator 2 and the housing 1. The elastic connecting member 3 includes a first elastic connecting member 31 and a second elastic connecting member 32 connected to each other. The first elastic connecting member 31 and the second elastic connecting member 32 respectively extend along the first vibration direction X and the second vibration direction Z and are connected in series with each other. The first elastic connecting member 31 and the second elastic connecting member 32 are respectively connected to the mass block 22 and the housing 1, providing a structural basis for the two-way vibration mode of the vibration motor in the first vibration direction X and the second vibration direction Z, while ensuring that the overall stress of the elastic connecting member 3 meets the reliability requirements and the stiffness design is simple. The magnetic circuit assembly is obliquely magnetized and the magnetization direction is parallel to the XZ plane. The magnetic circuit assembly can provide vibration driving forces for the oscillator 2 in the first vibration direction X and the second vibration direction Z, thereby providing a basis for the two-way vibration of the vibration motor in the first vibration direction X and the second vibration direction Z, realizing the vibration function of the vibration motor in the two directions of the first vibration direction X and the second vibration direction Z, and providing a hardware basis for the diversity of vibration signals applied by the vibration motor.

[0030] See Figure 1 and Figures 6 to 8As shown, the mass block 22 has a hollow frame structure with a second accommodation chamber 221. The mass block 22 includes two X-direction end faces 223 that are perpendicular to the first vibration direction X and opposite to each other, and two Z-direction end faces 222 that are perpendicular to the second vibration direction Z and opposite to each other. The number of the first elastic connectors 31 is two and they are respectively connected to the two Z-direction end faces 222. The number of the second elastic connectors 32 is two and they are respectively arranged at intervals with the two X-direction end faces 223. Each of the first elastic connectors 31 is connected in series with the two second elastic connectors 32.

[0031] Both of the two Z-direction end faces 222 are provided with first connection blocks 224 that protrude and extend away from the mass block 22 and are respectively connected to the two first elastic connectors 31; the inner walls of the housing 1 opposite to the two second elastic connectors 32 are provided with second connection blocks 12 connected to the second elastic connectors 32.

[0032] See Figures 6 to 8 As shown, the two first elastic connectors 31 include first fixing parts 311 fixedly connected to the first connection blocks 224 and first deformation parts 312 symmetrically connected to the X-direction two ends of the first fixing parts 311; the two second elastic connectors 32 include second fixing parts 321 fixedly connected to the second connection blocks 12 and second deformation parts 322 symmetrically connected to the Z-direction two ends of the second fixing parts 321.

[0033] Optionally, Kx of the first elastic connector 31 is greater than Kz, and Kz of the second elastic connector 32 is greater than Kx; where, Kx refers to the elastic coefficient component of the elastic connector 3 along the first vibration direction X, and Kz refers to the elastic coefficient component of the elastic connector 3 along the second vibration direction Z. That is, when the vibrator 2 works in the X direction, mainly the second elastic connector 32 deforms, and when the vibrator 2 works along the second vibration direction Z, mainly the first elastic connector 31 deforms. According to actual requirements, by setting the Kx and Kz values of the first elastic connector 31 and the second elastic connector 32, the Fx and Fz values of the vibration motor can be set, further ensuring that the stress of the elastic connector 3 as a whole meets the reliability requirements and the stiffness design is simple; where, Fx refers to the vibration force of the vibration motor along the first vibration direction X, and Fz refers to the vibration force of the vibration motor along the second vibration direction Z.

[0034] See Figures 1 to 4As shown, the magnetic circuit assembly 21 includes a first pole core 211 and a second pole core 212 that are parallel to the XZ plane and are respectively fixed to opposite inner walls of the mass block 22, a first magnetic steel 213 fixed to the first pole core 211, and a second magnetic steel 214 fixed to the second pole core 212 and facing the first magnetic steel 213. Refer to Figure 5 As shown, taking the first magnetic steel 213 as an example, the magnetic distribution of the magnetic steel magnetization in the present invention is specifically shown. The polarities of the opposite magnetic poles of the first magnetic steel 213 and the second magnetic steel 214 are the same.

[0035] Refer to Figures 1 to 4 and Figure 6 As shown, the stator solenoid 4 includes an iron core 41, two guide pole shoes 42 respectively fixed to both ends of the iron core 41, and a coil 43 wound around the surface of the iron core 41 and located between the two guide pole shoes 42. The two guide pole shoes 42 are fixed to the bottom wall of the housing 1 and are respectively arranged at intervals opposite to the first magnetic steel 213 and the second magnetic steel 214. After the stator solenoid 4 is energized, the two guide pole shoes 42 are magnetized and thus have magnetic attraction.

[0036] The first magnetic steel 213 and the second magnetic steel 214 are attached to the inner wall of the mass block 22, and the polarities of the opposite magnetic poles of the first magnetic steel 213 and the second magnetic steel 214 are the same. Specifically, the mass block 22 is arranged on the outer periphery of the magnetic circuit assembly 21, and the first magnetic steel 213 and the second magnetic steel 214 are respectively fixed to the inner wall of the mass block 22.

[0037] Optionally, in the embodiments of the present invention, both the first elastic connector 31 and the second elastic connector 32 are planar springs. In the present invention, the shapes of the first elastic connector 31 and the second elastic connector 32 are not specifically limited. It can be understood that in some other embodiments, in addition to selecting the planar spring structure, the elastic connector 3 can also select other structural forms. It should be noted that the directions up and down refer to two planes opposite to each other along the second vibration direction Z.

[0038] Optionally, in some embodiments, the elastic connector 3 is obtained by separately forming and then assembling and connecting the first elastic connector 31 and the second elastic connector 32. The first elastic connector 31 and the second elastic connector 32 are formed separately and then assembled together, which facilitates the connection between the elastic connector 3 and the housing 1 and the oscillator 2.

[0039] In some other embodiments, the elastic connecting member 3 is integrally formed by the first elastic connecting member 31 and the second elastic connecting member 32, so that the elastic connecting member 3 can be directly installed after being formed once, saving the assembly of the elastic connecting member 3, and the integral structure setting ensures the firmness and stability of the connection between the first elastic connecting member 31 and the second elastic connecting member 32.

[0040] An embodiment of the present invention further provides an electronic device, which includes the vibration motor as described above. The vibration motor has the vibration functions in two directions of the first vibration direction X and the second vibration direction Z, providing a hardware basis for the diversity of vibration signals in the electronic device. The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A vibration motor, comprising a housing having a first accommodating chamber, a stator solenoid accommodated in the first accommodating chamber and fixed to the housing, a vibrator suspended in the first accommodating chamber, and an elastic connecting member connecting the vibrator and the housing, wherein the vibrator comprises a mass block and a magnetic circuit assembly fixed to the mass block, characterized in that: The vibrator vibrates along a first vibration direction and a second vibration direction perpendicular to the first vibration direction, the magnetic circuit assembly is obliquely magnetized and the magnetization direction is parallel to the XZ plane; the elastic connector includes a first elastic connector and a second elastic connector connected to each other, the first elastic connector is extended along the first vibration direction and fixed to the mass block, and the second elastic connector is extended along the second vibration direction and fixed to the inner wall of the shell; wherein the first vibration direction refers to a direction parallel to the X direction in the space coordinate system, and the second vibration direction refers to a direction parallel to the Z direction in the space coordinate system; the XZ plane refers to a plane parallel to the plane enclosed by the first vibration direction and the second vibration direction; The mass block is a hollow structure having a second accommodating chamber, the mass block comprises two X-direction end faces perpendicular to the first vibration direction and opposite to each other, and two Z-direction end faces perpendicular to the second vibration direction and opposite to each other, the number of the first elastic connectors is two and they are respectively connected to the two Z-direction end faces, the number of the second elastic connectors is two and they are respectively spaced apart from the two X-direction end faces, and each of the first elastic connectors is connected in series with two of the second elastic connectors; The two Z-direction end surfaces are each provided with a first connection block extending away from the mass block and connected to the two first elastic connectors respectively; the inner wall of the housing opposite to the two second elastic connectors is provided with a second connection block connected to the second elastic connectors; The two first elastic connecting members include a first fixing portion fixedly connected to the first connecting block and a first deformable portion symmetrically connected to both ends of the first fixing portion in the X direction; the two second elastic connecting members include a second fixing portion fixedly connected to the second connecting block and a second deformable portion symmetrically connected to both ends of the second fixing portion in the Z direction.

2. The vibration motor according to claim 1, characterized in that: The Kx of the first elastic connector is greater than Kz, and the Kz of the second elastic connector is greater than Kx; wherein Kx refers to the elastic coefficient component of the elastic connector along the first vibration direction, and Kz refers to the elastic coefficient component of the elastic connector along the second vibration direction.

3. The vibration motor according to claim 1, characterized in that: The magnetic circuit assembly includes a first pole core and a second pole core which are parallel to the XZ plane and respectively fixed to two opposite inner walls of the mass block, a first magnetic steel fixed to the first pole core, and a second magnetic steel fixed to the second pole core and opposite to the first magnetic steel, wherein the polarities of the opposite magnetic poles of the first magnetic steel and the second magnetic steel are the same.

4. The vibration motor according to claim 3, characterized in that: The stator solenoid includes an iron core, two magnetic pole shoes respectively fixed at both ends of the iron core, and a coil wrapped around the surface of the iron core and located between the two magnetic pole shoes. The two magnetic pole shoes are fixed to the bottom wall of the shell and are respectively arranged opposite to the first magnetic steel and the second magnetic steel.

5. The vibration motor according to claim 1, characterized in that: The first elastic connecting member and the second elastic connecting member are both planar springs.

6. The vibration motor according to claim 1, characterized in that: The elastic connecting member is obtained by forming the first elastic connecting member and the second elastic connecting member separately and then assembling and connecting them.

7. An electronic device, characterized in that: It comprises a vibration motor as described in any one of claims 1 to 6.

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