US 12,451,786 B2
Linear vibration motor
Weibo Chen, Changzhou (CN); Xiaorong Zhou, Changzhou (CN); Ziyang Zhang, Changzhou (CN); and Keyang Wang, Changzhou (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Jiangsu (CN)
Filed on Dec. 14, 2023, as Appl. No. 18/539,283.
Application 18/539,283 is a continuation of application No. PCT/CN2023/116814, filed on Sep. 4, 2023.
Prior Publication US 2025/0079962 A1, Mar. 6, 2025
Int. Cl. H02K 33/18 (2006.01)
CPC H02K 33/18 (2013.01) 9 Claims
OG exemplary drawing
 
1. A linear vibration motor, comprising:
a casing with an accommodating space;
a stator accommodated in the accommodating space;
a vibrator accommodated in the accommodating space, comprising:
a mass block fixedly connected to an elastic member and provided with a through-hole; and
a magnetic circuit system accommodated in the through-hole, comprising:
a first magnetic steel arranged on one side of the stator in a vibration direction perpendicular to the vibrator; and
a second magnetic steel arranged on the other side of the stator in the vibration direction perpendicular to the vibrator; and
the elastic member fixed to the casing and configured to suspend in the vibrator in the accommodating space;
wherein the first magnetic steel and the second magnetic steel are extended in parallel and arranged centrally symmetrically around a geometric center of the stator; the first magnetic steel comprises a first magnetic steel portion, an orthographic projection of which along a direction perpendicular to the vibration direction of the vibrator is arranged outside the second magnetic steel; and the second magnetic steel comprises a second magnetic steel portion, an orthographic projection of which along the direction perpendicular to the vibration direction of the vibrator is arranged outside the first magnetic steel.