Vibration motor and electronic device

Abstract

The invention provides a vibration motor and electronic equipment, and the vibration motor comprises a housing which is provided with a first accommodation chamber, a stator solenoid which is accommodated in the first accommodation chamber and is fixed to the housing, a vibrator which is suspended in the first accommodation chamber, and an elastic connecting piece which is connected with the vibrator and the housing. The vibrator comprises a mass block and a magnetic circuit assembly fixed to the mass block, the vibrator vibrates in the first vibration direction and the second vibration direction, and the magnetic circuit assembly is magnetized in the inclined direction; the elastic connecting pieces comprise the first elastic connecting piece and the second elastic connecting piece which are connected with each other, the first elastic connecting piece extends in the first vibration direction and is fixed to the mass block, and the second elastic connecting piece extends in the second vibration direction and is fixed to the inner wall of the shell. According to the vibration motor, the vibration function of the vibration motor in the first vibration direction and the second vibration direction can be achieved, it can be guaranteed that the overall stress of the elastic connecting piece meets the reliability requirement, and the rigidity design is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a vibration motor and electronic equipment. Background Art

[0002] Vibration motors are one of the important components of electronic devices and are usually used for system feedback of electronic devices, such as incoming call notifications, message notifications, navigation notifications of mobile phones, vibration feedback of game consoles, etc. However, vibration motors in the prior art are generally only driven by a single direction, resulting in vibrations that can only generate vibrations in a single direction.

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

[0004] The object of the present invention is to provide a vibration motor and an electronic device, wherein the vibration motor has a multi-directional vibration mode and can realize bidirectional vibration along a first vibration direction and a second vibration direction.

[0005] The technical solution of the present invention is as follows: In a first aspect, the present invention provides a vibration motor, comprising a shell having a first accommodating chamber, a stator solenoid accommodated in the first accommodating chamber and fixed to the shell, a vibrator suspended in the first accommodating chamber, and an elastic connector connecting the vibrator and the shell, wherein the vibrator comprises a mass block and a magnetic circuit component fixed to the mass block, the vibrator vibrates along a first vibration direction and a second vibration direction perpendicular to the first vibration direction, the magnetic circuit component is obliquely magnetized and the magnetization direction is parallel to the XZ plane; the elastic connector comprises a first elastic connector and a second elastic connector connected to each other, the first elastic connector extends along the first vibration direction and is fixed to the mass block, and the second elastic connector extends along the second vibration direction and is fixed to the inner wall of the shell; wherein the XZ plane refers to a plane parallel to the plane enclosed by the first vibration direction and the second vibration direction.

[0006] Optionally, the vibrator also includes a mass block suspended in the first accommodating chamber, which has a hollow structure with a second accommodating chamber. The mass block includes two X-direction end faces that are perpendicular to the first vibration direction and opposite to each other, and two Z-direction end faces that are 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 spaced apart from the two X-direction end faces. Each of the first elastic connecting members is connected in series with two of the second elastic connecting members.

[0007] Optionally, the two Z-direction end surfaces are provided with a first connecting block protruding away from the mass block and respectively connected to the two first elastic connecting members; the inner wall of the shell opposite to the two second elastic connecting members is provided with a second connecting block connected to the second elastic connecting members.

[0008] Optionally, the two first elastic connecting members include a first fixed portion fixedly connected to the first connecting block and a first deformable portion symmetrically connected to both ends of the first fixed portion in the X direction; the two second elastic connecting members include a second fixed portion fixedly connected to the second connecting block and a second deformable portion symmetrically connected to both ends of the second fixed portion in the Z direction.

[0009] 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.

[0010] Optionally, the magnetic circuit assembly includes a first pole core and a second pole core parallel to the XZ plane and respectively fixed to two 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 opposite to the first magnet, and the polarity of the facing magnetic poles of the first magnet and the second magnet are the same.

[0011] Optionally, 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.

[0012] Optionally, both the first elastic connecting member and the second elastic connecting member are planar springs.

[0013] Optionally, the elastic connecting member is obtained by assembling and connecting the first elastic connecting member and the second elastic connecting member after being formed separately.

[0014] In another aspect, the present invention provides an electronic device, comprising the vibration motor as described in any one of the above items.

[0015] The beneficial effects of the present invention are: The present invention provides a vibration motor and an electronic device. The vibration motor includes an elastic connector respectively connected to the vibrator and the shell, the elastic connector includes 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 connected to each other in series, the first elastic connector and the second elastic connector are respectively connected to the mass block and the shell, which provide 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 overall stress of the elastic connector meets the reliability requirement and the stiffness design is simple; the vibrator includes two sections of obliquely magnetized magnetic steel, the magnetic steel can provide the vibrator with vibration driving force in the first vibration direction and the second vibration direction, thereby providing a power basis for the vibration motor to realize bidirectional vibration in the first vibration direction and the second vibration direction, realizing the vibration function of the vibration motor in the first vibration direction and the second vibration direction, and providing a hardware basis for the diversity of vibration signals applied to the vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of the vibration motor of the present invention.

[0017] Figure 2 It is a top view of the vibration motor of the present invention.

[0018] Figure 3 for Figure 2 Section view along AA.

[0019] Figure 4 for Figure 2 Section view along BB.

[0020] Figure 5 Schematic diagram of magnetic distribution of magnetized magnetic steel in magnetic circuit assembly.

[0021] Figure 6 Schematic diagram of the assembly of the elastic connector.

[0022] Figure 7 Schematic diagram of the assembly of the elastic connector and the vibrator.

[0023] Figure 8 It is a schematic diagram of the structure of the elastic connector. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0025] The present invention provides a vibration motor, see Figures 1 to 6As shown, it includes a shell 1 with a first accommodating chamber 11, a stator solenoid 4 accommodated in the first accommodating chamber 11 and fixed to the shell 1, a vibrator 2 suspended in the first accommodating chamber 11, and an elastic connector 3 connecting the vibrator 2 and the shell 1, the vibrator 2 includes a mass block 22 and a magnetic circuit component 21 fixed to the mass block 22, the vibrator 2 vibrates along a first vibration direction X and a second vibration direction Z perpendicular to the first vibration direction X; the magnetic circuit component 21 is obliquely magnetized and the magnetization direction is parallel to the XZ plane; the elastic connector 3 includes a first elastic connector 31 and a second elastic connector 32 connected to each other, the first elastic connector 31 is extended along the first vibration direction X and fixed to the mass block 22, the second elastic connector 32 is extended along the second vibration direction Z and fixed to the inner wall of the shell 1; wherein the XZ plane refers to a plane parallel to the plane enclosed by the first vibration direction X and the second vibration direction Z.

[0026] It should be noted that in the present invention, the first vibration direction refers to the direction parallel to the X direction in the spatial coordinate system, and the second vibration direction refers to the direction parallel to the Z direction in the spatial coordinate system; the inward direction refers to the direction close to the center of the shell 1, and the outward direction refers to the direction away from the center of the shell 1. The corresponding XZ plane refers to a plane parallel to the plane formed by the X-axis and the Z-axis in the spatial coordinate system.

[0027] The vibration motor of the present invention includes an elastic connector 3 connected to the vibrator 2 and the shell 1 respectively, and the elastic connector 3 includes a first elastic connector 31 and a second elastic connector 32 connected to each other, and the first elastic connector 31 and the second elastic connector 32 are respectively along the first vibration direction X and the second vibration direction Z and are connected in series with each other. The first elastic connector 31 and the second elastic connector 32 are respectively connected to the mass block 22 and the shell 1, which provide a structural basis for the bidirectional 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 connector 3 meets the reliability requirements and the stiffness design is simple; the magnetic circuit component is obliquely magnetized and the magnetization direction is parallel to the XZ plane. The magnetic circuit component can provide the vibrator 2 with a vibration driving force in the first vibration direction X and the second vibration direction Z, thereby providing a basis for the bidirectional 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 first vibration direction X and the second vibration direction Z, and providing a hardware basis for the diversity of vibration signals applied to the vibration motor.

[0028] See also Figure 1 and Figures 6 to 8As shown, the mass block 22 is a hollow frame structure with a second accommodating chamber 221, and the mass block 22 includes two X-direction end faces 223 perpendicular to the first vibration direction X and opposite to each other, and two Z-direction end faces 222 perpendicular to the second vibration direction Z and opposite to each other, the number of the first elastic connecting members 31 is two and they are respectively connected to the two Z-direction end faces 222, the number of the second elastic connecting members 32 is two and they are respectively spaced apart from the two X-direction end faces 223, and each of the first elastic connecting members 31 is connected in series with two of the second elastic connecting members 32.

[0029] The two Z-direction end faces 222 are each provided with a first connecting block 224 protruding away from the mass block 22 and respectively connected to the two first elastic connecting members 31 ; the inner wall of the shell 1 opposite to the two second elastic connecting members 32 is provided with a second connecting block 12 connected to the second elastic connecting members 32 .

[0030] See also Figures 6 to 8 As shown, the two first elastic connectors 31 include a first fixed portion 311 fixedly connected to the first connecting block 224 and a first deformable portion 312 symmetrically connected to both ends of the first fixed portion 311 in the X direction; the two second elastic connectors 32 include a second fixed portion 321 fixedly connected to the second connecting block 12 and a second deformable portion 322 symmetrically connected to both ends of the second fixed portion 321 in the Z direction.

[0031] Optionally, Kx of the first elastic connector 31 is greater than Kz, and Kz of the second elastic connector 32 is greater than Kx; wherein 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, it is mainly the second elastic connector 32 that is deformed, and when the vibrator 2 works along the second vibration direction Z, it is mainly the first elastic connector 31 that is deformed. According to actual needs, 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 overall stress of the elastic connector 3 meets the reliability requirements and the stiffness design is simple; wherein 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.

[0032] See also Figures 1 to 4As shown, the magnetic circuit assembly 21 includes a first pole core 211 and a second pole core 212 which are parallel to the XZ plane and respectively fixed to two 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. Figure 5 As shown, the magnetic distribution of the magnetized magnetic steel in the present invention is specifically demonstrated by taking the first magnetic steel 213 as an example. The polarity of the first magnetic steel 213 and the second magnetic steel 214 facing the magnetic pole is the same.

[0033] See also Figures 1 to 4 and Figure 6 The stator solenoid 4 shown in the figure comprises an iron core 41, two magnetic pole shoes 42 respectively fixed at 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 magnetic pole shoes 42. The two magnetic pole shoes 42 are fixed to the bottom wall of the housing 1 and are respectively arranged opposite to the first magnetic steel 213 and the second magnetic steel 214. When the stator solenoid 4 is energized, the two magnetic pole shoes 42 are magnetized, thereby having magnetic attraction.

[0034] The first magnetic steel 213 and the second magnetic steel 214 are attached to the inner wall of the mass block 22, and the first magnetic steel 213 and the second magnetic steel 214 have the same relative magnetic polarity. Specifically, the mass block 22 is disposed 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.

[0035] Optionally, in an embodiment of the present invention, both the first elastic connector 31 and the second elastic connector 32 are plane springs. The present invention does not specifically limit the shapes of the first elastic connector 31 and the second elastic connector 32. It is understandable that in other embodiments, in addition to the plane spring structure, other structural forms can also be used for the elastic connector 3. It should be noted that the direction up and down refer to two planes opposite to each other along the second vibration direction Z.

[0036] Optionally, in some embodiments, the elastic connector 3 is obtained by forming the first elastic connector 31 and the second elastic connector 32 separately and then assembling them. The first elastic connector 31 and the second elastic connector 32 are formed separately and then assembled, which facilitates the connection between the elastic connector 3 and the housing 1 and the vibrator 2.

[0037] In other embodiments, the elastic connector 3 is formed integrally with the first elastic connector 31 and the second elastic connector 32, so that the elastic connector 3 can be directly installed after being formed once, saving the assembly of the elastic connector 3, and the integrated structure ensures the firmness and stability of the connection between the first elastic connector 31 and the second elastic connector 32.

[0038] The embodiment of the present invention further provides an electronic device, which includes the vibration motor as described above. The vibration motor has vibration functions in two directions, the first vibration direction X and the second vibration direction Z, and provides a hardware basis for the diversity of vibration signals in the electronic device. The above is only an embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, improvements can be made without departing from the creative 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 that are 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 XZ plane refers to a plane parallel to a plane enclosed by the first vibration direction and the second vibration direction.

2. The vibration motor according to claim 1, characterized in that: The mass block is a hollow structure with a second accommodating chamber, and 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 spaced apart from the two X-direction end faces, and each of the first elastic connecting members is connected in series with two of the second elastic connecting members.

3. The vibration motor according to claim 2, characterized in that: The two Z-direction end surfaces are each provided with a first connection block protruding and extending away from the mass block and respectively connected to the two first elastic connectors; the inner wall of the shell opposite to the two second elastic connectors is provided with a second connection block connected to the second elastic connectors.

4. The vibration motor according to claim 3, characterized in that: 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.

5. 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.

6. 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.

7. The vibration motor according to claim 6, 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.

8. 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.

9. 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.

10. An electronic device, characterized in that: It comprises a vibration motor as claimed in any one of claims 1 to 9.

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