Linear vibration motor

• US 10,971,983 B2
• Filed: 06/01/2016
• Issued: 04/06/2021
• Est. Priority Date: 03/11/2016
• Status: Active Grant

• Current Assignee: Goertek Incorporated
• Original Assignee: Goertek Incorporated
• Inventors: Zhu, Yueguang, Liu, Baoyu, Shi, Dezhang
• Primary Examiner(s): Kim, John K
• Application Number:
  US16/083,934
• Publication Number:
  US 20200295646A1
• Time in Patent Office: 1,770 Days
• Field of Search: 310 29
• CPC Class Codes: H02K 33/02 with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
• CPC Class Codes: H02K 33/16 with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
• CPC Class Codes: H02K 5/24 specially adapted for suppression or reduction of noise or vibrations

Abstract

The present invention relates to the technical field of electronic products, and provides a linear vibration motor. The linear vibration motor comprises a motor housing, a stator, a vibrator, and two elastic supports for suspending the vibrator within the motor housing, for supporting the vibrator and for providing elastic restoring forces, wherein the elastic supports are located at two ends of the vibrator in a vibration direction respectively. Each of the elastic supports is made up of a plurality of elastic sheets whose one ends are fixedly connected in sequence, which are arranged side by side and which have C-shaped openings respectively. Each of the elastic supports comprises a first connection point fixedly connected to the vibrator and a second connection point fixedly connected to the inner wall of the motor housing. Therefore, the polarization phenomenon of a vibration block is reduced when the vibration feedback to a user'"'"'s touch operation is realized, the noise is reduced, and the stability and the reliability of the entire linear vibration motor are improved.

Claims

1. A linear vibration motor, comprising a motor housing, a stator, a vibrator, and two elastic supports for suspending the vibrator within the motor housing, for supporting the vibrator and for providing elastic restoring forces, wherein the two elastic supports are located at two ends of the vibrator in a vibration direction thereof respectively;

each of the elastic supports is made up of a plurality of elastic sheets whose one ends are fixedly connected in sequence, which are arranged side by side and which have C-shaped openings respectively;

each of the elastic supports comprises a first connection point and a second connection point,

wherein the first connection point is fixedly connected to an end surface of the vibrator perpendicular to the vibration direction of the vibrator, and the second connection point is fixedly connected to an inner wall of the motor housing perpendicular to the vibration direction of the vibrator,

wherein the C-shaped openings of the plurality of elastic sheets are open in a direction perpendicular to the vibration direction of the vibrator, and

wherein the plurality of elastic sheets are fixedly connected in a form of forward welding, and are thus arranged to be overlapped when viewed from the vibration direction of the vibrator.

2. The linear vibration motor according to claim 1, wherein the C-shaped openings of the plurality of elastic sheets all face the same direction.

3. The linear vibration motor according to claim 1, wherein the C-shaped openings of neighboring elastic sheets of each elastic support face opposite directions.

4. The linear vibration motor according to claim 1, wherein the first connection points of the elastic supports arranged at two ends of the vibrator are diagonally arranged in a region defined by the motor housing.

5. The linear vibration motor according to claim 1, wherein the vibrator comprises a mass block and magnets, and the mass block is provided with mounting holes allowing the magnets to be mounted therein.

6. The linear vibration motor according to claim 5, wherein the first connection points of the two elastic supports are respectively arranged on sidewalls on two sides of the mass block, and are disposed oppositely from each other, in the vibration direction, about a center of the mass block.

7. The linear vibration motor according to claim 5, wherein a stop block is arranged at a position where the first connection point and the sidewall of the mass block are connected and a position where the second connection point and the inner wall of the motor housing are connected, respectively.

8. The linear vibration motor according to claim 7, wherein a damping block is arranged on the stop blocks respectively;

and

a make-way mechanism for increasing a damping area of the damping block is arranged on each stop block.

9. The linear vibration motor according to claim 1, wherein the stator comprises a circuit board which is fixed to a lower portion of the motor housing and connected to a coil.

10. The linear vibration motor according to claim 1, wherein the motor housing comprises an upper housing and a lower housing.