US 11,967,874 B2
Linear vibration motor with copper rig around magnetic conductive plate with thickness
Ziang Li, Shenzhen (CN); Zhiyong Cui, Shenzhen (CN); Jie Ma, Shenzhen (CN); and Lubin Mao, Shenzhen (CN)
Assigned to AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Microtech (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Dec. 3, 2021, as Appl. No. 17/541,287.
Claims priority of application No. 202120662956.3 (CN), filed on Mar. 31, 2021.
Prior Publication US 2022/0320984 A1, Oct. 6, 2022
Int. Cl. H02K 33/02 (2006.01)
CPC H02K 33/02 (2013.01) 7 Claims
OG exemplary drawing
 
1. A linear vibration motor comprising:
a housing with an accommodation space;
a vibrator received in the accommodation space, comprising a weight with a receiving space, and a magnet unit fixed on the weight and received in the receiving space;
a stator received in the accommodation space and fixed on the housing, comprising:
a coil opposite to the magnet unit and arranged on one side of the vibrator along a first direction perpendicular with a vibration direction of vibrator; and
a copper ring opposite to the magnet unit and arranged on the other side of the vibrator along the first direction; and
an elastic support fixed on the vibrator and configured to suspend the vibrator in the accommodation space;
the stator further comprises an iron core surrounded by the coil and a magnetic conductive plate surrounded by the copper ring; a thickness of the iron core along the first direction is no more than a thickness of the coil along the first direction; a thickness of the magnetic conductive plate along the first direction is no more than a thickness of the copper ring along the first direction.