Title:
LINEAR VIBRATION MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/127908
Kind Code:
A1
Abstract:
A linear vibration motor (100), comprising a guide housing (1), a vibration unit (2), a coil unit (3), auxiliary magnetic steel units (4) and a conductive damping unit (6); the guide housing (1) comprises bodies (11) and guide channels (12) passing through the bodies (11); the vibration unit (2) is accommodated within the guide channels (12) and forms a sliding connection; the vibration unit (2) comprises a magnetic steel unit (21); the coil unit (3) is sleeved on the outside of the guide housing (1), and is used for driving the vibration unit (2) to vibrate along the axial direction of the guide channels (12); the auxiliary magnetic steel units (4) are fixed on the guide housing (1) and separated from the vibration unit (2); two auxiliary magnetic steel units (4) are provided, respectively arranged on two opposite sides of the coil unit (3) along the vibration direction; the conductive damping unit (6) is sleeved on the guide housing (1); the auxiliary magnetic steel units (4) are located within the magnetic field of the magnetic steel unit (21) in order to produce a vibration return force that restores vibration displacement of the vibration unit (2); the conductive damping unit (6) is located within the magnetic field of the magnetic steel unit (21) in order to produce a damping force that hinders vibration unit movement. The linear vibration motor (100) has better vibration performance.
Inventors:
LING FANGHUA (CN)
PU XIAOFENG (CN)
HUA ZIXU (CN)
WANG SHUMING (CN)
PU XIAOFENG (CN)
HUA ZIXU (CN)
WANG SHUMING (CN)
Application Number:
PCT/CN2019/127601
Publication Date:
July 01, 2021
Filing Date:
December 23, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)
AAC TECHNOLOGIES PTE LTD (SG)
International Classes:
H02K33/00; H02K35/00
Foreign References:
| JPH11178304A | 1999-07-02 | |||
| CN109889008A | 2019-06-14 | |||
| CN209402388U | 2019-09-17 | |||
| CN101707461A | 2010-05-12 |
Attorney, Agent or Firm:
GUANGDONG GUANGHE LAW FIRM (CN)
Download PDF:
Previous Patent: LINEAR VIBRATION MOTOR
Next Patent: PHOTOGRAPHING APPARATUS, ELECTRONIC DEVICE, AND CONTROL METHOD FOR ELECTRONIC DEVICE
Next Patent: PHOTOGRAPHING APPARATUS, ELECTRONIC DEVICE, AND CONTROL METHOD FOR ELECTRONIC DEVICE