Vibration motor

Abstract

A vibration motor, comprising a housing (1) having an accommodating space (13), a vibration assembly (2) and a stator assembly (3) accommodated in the accommodating space (13), and first elastic members (41) arranged on two sides of the vibration assembly (2) in a vibration direction, wherein the housing (1) comprises an upper cover (11) and a lower cover (12) arranged opposite each other; the stator assembly (3) comprises a solenoid assembly (31); the lower cover (12) is provided with two second elastic members (42) for supporting the solenoid assembly (31), the second elastic members (42) being spaced apart from the lower cover (12); and one end of each second elastic member (42) is fixed to the lower cover (12), and the other end thereof is fixed to the solenoid assembly (31), so that the solenoid assembly (31) can generate vibration in a vertical direction perpendicular to the vibration direction. The solenoid assembly (31) being fixed to the second elastic members (42) enables the solenoid assembly (31) to vibrate in the vertical direction, so that the amount of vibration in the vertical direction can be reduced without affecting the amount of vibration of the vibration assembly (2) in the vibration direction, thereby realizing a damping effect, and improving the vibration stability of the motor.

Description

Vibration motor Technical Field

[0001] The present invention relates to a vibration motor, and in particular to a vibration motor used in the field of mobile electronic products. Background Art

[0002] With the development of electronic technology, portable consumer electronic products are becoming more and more popular, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices. These electronic products generally use vibration motors for system feedback, such as incoming call notifications, message notifications, navigation notifications on mobile phones, vibration feedback on game consoles, etc.

[0003] The vibration motor of the related technology includes a shell with a receiving space, a vibration component located in the receiving space and a stator component fixed to the shell. The vibration component includes a mass block, and the stator component includes a fixed solenoid component. Due to factors such as assembly tolerance, the vibration component will have a large vertical acceleration component when vibrating in the vibration direction, generating vertical vibration, which affects the vibration experience.

[0004] Therefore, it is necessary to provide a new vibration motor to solve the above problems. Technical issues

[0005] In view of the above problems, the present invention provides a vibration motor with stable vibration performance. Technical Solutions

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A vibration motor includes a shell having a receiving space, a vibration component and a stator component received in the receiving space, and a first elastic member arranged on both sides of the vibration direction of the vibration component, the shell including an upper cover and a lower cover arranged opposite to each other, the stator component including a solenoid component, the lower cover being provided with two second elastic members supporting the solenoid component, the second elastic member being spaced apart from the lower cover, one end of the second elastic member being fixed to the lower cover, and the other end of the second elastic member being fixed to the solenoid component, so that the solenoid component can generate vibration in a vertical direction perpendicular to the vibration direction.

[0008] Preferably, a gasket is connected between the second elastic member and the lower cover, and one end of the second elastic member is fixed to the gasket.

[0009] Preferably, a fixing boss extends from the lower cover, and one end of the second elastic member is fixed to the fixing boss.

[0010] Preferably, the second elastic member is a long strip structure extending along the vibration direction.

[0011] Preferably, the solenoid assembly includes an iron core and a coil fixed on the outside of the iron core, the iron core includes two first parts arranged opposite to each other and a second part connecting the two first parts, the coil is wound around the second part, and the two first parts are respectively fixed to the other end of the two second elastic members.

[0012] Preferably, a damping plate is sandwiched between the second elastic member and the lower cover.

[0013] Preferably, the damping sheet is filled in the gap between the second elastic member and the lower cover.

[0014] Preferably, the damping plate is made of foam.

[0015] Preferably, the vibration component includes a mass block provided with an installation cavity and a magnetic component fixed in the installation cavity, the magnetic component includes relatively arranged magnets, and a magnetic conductive plate is provided between the magnets and the mass block, and the solenoid component is inserted into the installation cavity and spaced apart from the magnets. Beneficial effects

[0016] Compared with the related art, the lower cover of the vibration motor in the present invention is provided with a second elastic member supporting the solenoid assembly, and the second elastic member is spaced apart from the lower cover. When the vibration assembly generates vertical vibration, the solenoid assembly can generate reverse vibration with the same frequency as the vertical direction of the vibration assembly, thereby reducing the vibration amount in the vertical direction without affecting the vibration amount of the vibration motor in the vibration direction, achieving a shock-absorbing effect in the vertical direction and improving the stability of the vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a perspective view of a vibration motor according to an embodiment of the present invention;

[0018] FIG2 is a top view of FIG1 with the upper cover removed;

[0019] FIG3 is an exploded perspective view of the vibration motor shown in FIG1 ;

[0020] FIG4 is a cross-sectional view along line AA in FIG1 ;

[0021] FIG5 is a cross-sectional view of a vibration motor according to another embodiment of the present invention;

[0022] In the picture:

[0023] 100 / 200, vibration motor; 1. casing; 11. upper cover; 12. lower cover; 121. fixing boss; 13. accommodation space; 2. vibration assembly; 21. mass block; 211. mounting cavity; 22. magnetic assembly; 221. magnetic conductive plate; 222. magnet; 3. stator assembly; 31. solenoid assembly; 311. core; 311a, first part; 311b, second part; 312. coil; 32. flexible circuit board; 41. first elastic member; 411. welding piece; 42. second elastic member; 43. gasket; 44. damping plate; 5. damping member; 6. limit block; X, vibration direction; Z, vertical direction. Modes for Carrying Out the Invention

[0024] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] 1 to 4 , the present invention provides a vibration motor 100 , which includes a housing 1 having a receiving space 13 , a vibration assembly 2 and a stator assembly 3 received in the receiving space 13 , and a first elastic member 41 disposed on both sides of a vibration direction X of the vibration assembly 2 .

[0026] The housing 1 includes an upper cover 11 and a lower cover 12 that are oppositely arranged, and the stator assembly 3 is fixed to the lower cover 12 .

[0027] The vibration component 2 includes a mass block 21 having an installation cavity 211 and a magnetic component 22 placed in the installation cavity 211. The magnetic component 22 includes a magnetic conductive plate 221 fixed on the mass block 21 and a magnet 222 fixed on the magnetic conductive plate 221. The magnetic conductive plate 221 is used to converge the magnetic lines of force of the magnet 222, thereby improving the magnetic field performance of the vibration motor 100.

[0028] The stator assembly 3 includes a solenoid assembly 31 and a flexible circuit board 32. The solenoid assembly 31 is inserted into the mounting cavity 211 and is spaced apart from the magnetic steel 222. The solenoid assembly 31 includes an iron core 311 and a coil 312 fixedly mounted on the outside of the iron core 311. The iron core 311 includes two first parts 311a arranged opposite to each other and a second part 311b connecting the two first parts 311a. The coil 312 is wound around the second part 311b. The iron core 311 is arranged corresponding to the magnetic steel 222. The flexible circuit board 32 is electrically connected to the coil 312. When the coil 312 is energized, it interacts with the magnetic steel 222, so that the first elastic member 41 drives the mass block 21 to reciprocate along the vibration direction X, thereby providing a vibration sense.

[0029] One end of the first elastic member 41 is fixed to the housing 1 via a welding piece 411 , and the other end of the first elastic member 41 is fixed to the mass block 21 via the welding piece 411 .

[0030] 3 and 4 , two second elastic members 42 supporting the solenoid assembly 31 are provided on the lower cover 12 . The second elastic members 42 are spaced apart from the lower cover 12 . One end of the second elastic member 42 is fixed to the lower cover 12 , and the other end of the second elastic member 42 is fixed to the solenoid assembly 31 , so that the solenoid assembly 31 can generate vibration in a vertical direction Z perpendicular to the vibration direction X.

[0031] Referring to Figure 4, the second elastic member 42 is a long strip structure extending along the vibration direction X. A gasket 43 is connected between the second elastic member 42 and the lower cover 12. One end of the second elastic member 42 is fixed to the gasket 43, and the other end is fixed to the two first parts 311a of the pole core 311, so as to support the second elastic member 42 to drive the solenoid assembly 31 to vibrate along the vertical direction Z; a damping plate 44 is also sandwiched between the second elastic member 42 and the lower cover 12, and the damping plate 44 can be used to adjust the amplitude of the solenoid assembly 31 in the vertical direction Z. The damping plate 44 is distributed in the gap between the second elastic member 42 and the lower cover 12, and the material of the damping plate 44 can be foam.

[0032] 2 to 4 , to prevent collision and friction during the reciprocating motion of the mass block 21 by the first elastic member 41 along the vibration direction X, a damping member 5 is provided between the first elastic member 41 and the mass block 21. Furthermore, a stopper 6 is fixed to the lower cover 12 to limit the movement of the first elastic member 41 and the mass block 21 along the vibration direction X.

[0033] 5 , the present invention further provides a vibration motor 200 according to another embodiment. The difference between the vibration motor 200 according to this embodiment and the vibration motor 100 according to the first embodiment is that the gasket 43 is replaced by a fixed boss 121 extending from the lower cover 12, and one end of the second elastic member 42 is fixed to the fixed boss 121, and the other end is fixed to the two first parts 311a of the pole core 311, so as to support the second elastic member 42 to drive the solenoid assembly 31 to vibrate along the vertical direction Z; a damping plate 44 is further sandwiched between the second elastic member 42 and the lower cover 12, and the damping plate 44 can be used to adjust the amplitude of the solenoid assembly 31 in the vertical direction Z. The damping plate 44 is distributed in the gap between the second elastic member 42 and the lower cover 12, and the material of the damping plate 44 can be foam.

[0034] Compared to related technologies, the solenoid assembly of the vibration motor in the present invention is secured to the lower cover via a second elastic member. When the vibration assembly generates vertical vibration, the second elastic member, under the action of the magnet, causes the solenoid assembly to generate reverse vibration at the same frequency as the vibration assembly's vertical direction. This reduces vertical vibration without affecting the vibration of the vibration motor in the vertical direction, achieving a vertical vibration reduction effect. Furthermore, by providing a damping plate between the elastic member and the lower cover to adjust the amplitude of the solenoid assembly, vertical vibration can be reduced without affecting the vibration in the vertical direction, achieving a vibration reduction effect and improving the vibration stability of the vibration motor.

[0035] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A vibration motor, comprising a housing having a receiving space, a vibration assembly and a stator assembly received in the receiving space, and first elastic members disposed on both sides of the vibration direction of the vibration assembly. The housing includes an upper cover and a lower cover disposed opposite to each other. The stator assembly includes a solenoid assembly, characterized in that, Two second elastic members for supporting the solenoid assembly are provided on the lower cover. The second elastic members are spaced apart from the lower cover. One end of each second elastic member is fixed to the lower cover, and the other end of each second elastic member is fixed to the solenoid assembly, so that the solenoid assembly can generate vibrations in a vertical direction perpendicular to the vibration direction.

2. The vibration motor according to claim 1, characterized in that, A gasket is connected between the second elastic member and the lower cover, and one end of the second elastic member is fixed to the gasket.

3. The vibration motor according to claim 1, characterized in that, The lower cover extends a fixing boss, and one end of the second elastic member is fixed to the fixing boss.

4. The vibration motor according to claim 1, characterized in that, The second elastic member is a strip structure extending along the vibration direction.

5. The vibration motor according to claim 1, characterized in that, The solenoid assembly includes an iron core and a coil sleeved and fixed outside the iron core. The iron core includes two relatively arranged first parts and a second part connecting the two first parts. The coil is wound around the second part, and the two first parts are respectively fixed to the other ends of the two second elastic members.

6. The vibration motor according to claim 1, characterized in that, A damping sheet is sandwiched between the second elastic member and the lower cover.

7. The vibration motor according to claim 6, characterized in that, The gap between the second elastic member and the lower cover, which is spaced apart, is filled with the damping sheet.

8. The vibration motor according to claim 6, characterized in that, The damping sheet is made of foam.

9. The vibration motor according to claim 1, characterized in that: The vibration assembly includes a mass block provided with an installation cavity and a magnetic assembly fixed in the installation cavity. The magnetic assembly includes relatively arranged magnetic steels. A magnetic conductive plate is further provided between the magnetic steels and the mass block. The solenoid assembly is inserted into the installation cavity and is spaced apart from the magnetic steels.

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