US 11,658,554 B2
Vibrating with stop magnets, mandrel and guiding member
Jie Ma, Shenzhen (CN); and Zhiyong Cui, Shenzhen (CN)
Assigned to AAC Technologies Pte. Ltd., Singapore (SG)
Filed by AAC Technologies Pte. Ltd., Singapore (SG)
Filed on Aug. 2, 2020, as Appl. No. 16/945,924.
Application 16/945,924 is a continuation of application No. PCT/CN2019/094084, filed on Jun. 30, 2019.
Prior Publication US 2020/0412224 A1, Dec. 31, 2020
Int. Cl. H02K 33/18 (2006.01)
CPC H02K 33/18 (2013.01) 12 Claims
OG exemplary drawing
 
1. A vibration motor, comprising:
a housing having a receiving space;
a vibrator received in the receiving space;
two stop assemblies received in the receiving space and spaced apart from each other; and
coils configured to drive the vibrator to reciprocate between the two stop assemblies,
wherein the vibrator comprises first magnets spaced apart from each other and at least one second magnet arranged between the first magnets, every two adjacent first magnets of the first magnets have opposite magnetization directions, and a magnetization direction of each of the at least one second magnet is perpendicular to a magnetization direction of each of the first magnets;
wherein the vibrator further comprises a mandrel reciprocating between the two stop assemblies, and each of the first magnets and the at least one second magnet is annular and surrounds the mandrel;
wherein the vibration motor further comprising a guiding member arranged along the vibration direction and having two ends fixed to the housing, wherein the mandrel is provided with a fixing hole penetrating therethrough along the vibration direction, and the guiding member is inserted in the fixing hole in such a manner that the mandrel is connected to the guiding member along the vibration direction in a slidable way;
wherein a projection of the mandrel along the vibration direction is rectangular, the mandrel comprises four side walls connected end to end, each of the first magnets comprises four first magnet units respectively fixed to the four side walls, and the four first magnet units are arranged in a ring to define the first magnet.