US 12,407,233 B2
Linear vibration motor
Weibo Chen, Changzhou (CN); and Xiaorong Zhou, Changzhou (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Jiangsu (CN)
Filed on May 18, 2023, as Appl. No. 18/319,515.
Application 18/319,515 is a continuation of application No. PCT/CN2023/076318, filed on Feb. 16, 2023.
Prior Publication US 2024/0283342 A1, Aug. 22, 2024
Int. Cl. H02K 33/02 (2006.01); H02K 33/16 (2006.01)
CPC H02K 33/02 (2013.01) [H02K 33/16 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A linear vibration motor, comprising:
a housing with a receiving space;
a vibration assembly received in the receiving space; and
a coil received in the receiving space, wherein the vibration assembly comprises a mass block received in the receiving space, a magnet assembly fixed to the mass block, and an elastic member that drives the mass block to move back and forth; the coil is arranged corresponding to the magnet assembly;
the mass block is provided with a receiving space for receiving the magnet assembly;
the mass block comprises a side wall and a bottom wall that enclose to form the receiving space;
the magnet assembly comprises a first magnet, a second magnet, and a third magnet that are received in the receiving space and arranged in sequence along a first direction;
the first magnet, the second magnet, and the third magnet are all fixed to the bottom wall by gluing;
the mass block further comprises a fixation boss protruding from the bottom wall toward the second magnet, the second magnet being fixed to the fixation boss;
the fixation boss extends along a second direction perpendicular to the first direction, and along the second direction, a width of the second magnet is greater than a width of the fixation boss;
an edge of the bottom wall is provided with a glue-receiving groove recessed away from the second magnet, and the glue-receiving groove has a ring shape; and
along the second direction, two ends of the fixation boss extend to the glue-receiving groove.