US 12,244,202 B2
Voice coil motor, camera module, and electronic device
Wei Tang, Dongguan (CN); Yifan Wang, Shenzhen (CN); and Wei Luo, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Appl. No. 17/782,257
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Dec. 3, 2020, PCT No. PCT/CN2020/133564
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/110091, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 201911229578.3 (CN), filed on Dec. 4, 2019.
Prior Publication US 2023/0008053 A1, Jan. 12, 2023
Int. Cl. H02K 41/035 (2006.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01); H04N 23/57 (2023.01); H05K 1/14 (2006.01); H05K 1/18 (2006.01)
CPC H02K 41/0356 (2013.01) [H02K 41/0354 (2013.01); H04N 23/54 (2023.01); H04N 23/55 (2023.01); H04N 23/57 (2023.01); H05K 1/14 (2013.01); H05K 1/189 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A voice coil motor, comprising:
a first magnetic piece;
a second magnetic piece;
a third magnetic piece; and
a counterweight, wherein the first magnetic piece, the second magnetic piece, the third magnetic piece, and the counterweight are radially and sequentially arranged around an optical carrier;
a first plurality of coils that are symmetrically fastened on two sides of the optical carrier, wherein the first plurality of coils comprises a first coil and a second coil, the first coil is disposed opposite the first magnetic piece, and the second coil is disposed opposite the third magnetic piece;
a first magnetic sensor; and
a first induction magnet disposed opposite the first magnetic sensor, wherein the first magnetic sensor is disposed on a side that is of the counterweight and that faces an outer wall of the optical carrier and the first induction magnet, and wherein the first induction magnet is fastened on a surface of the outer wall that is of the optical carrier and that is adjacent to the counterweight, the surface of the outer wall of the optical carrier being a closest surface of the optical carrier to the first magnetic sensor; and
wherein coils of the first plurality of coils are configured to drive the optical carrier to move in a direction of an optical axis with the first induction magnet, and wherein the first magnetic sensor is configured to convert a magnetic field signal generated by the first induction magnet into a first electrical signal.