Patent ID: 7633190

Claim:
A voice coil motor, comprising: a fixed base; at least one guide bar connected to the fixed base; at least one coil connected to the fixed base and comprising a first winding portion and a second winding portion connected to and opposite the first winding portion, wherein a current direction in the first winding portion is opposite to that in the second winding portion; a support base movably fit on the guide bar; and at least one magnetic member connected to the support base and comprising a first magnetic pole and a second magnetic pole, wherein a magnetization direction of the magnetic member parallels a moving direction of the support base and magnetic member and is perpendicular to a central axis of the coil, the first and second magnetic poles respectively oppose the first and second winding portions of the coil, the first magnetic pole interacts with the first winding portion to generate a first force, the second magnetic pole interacts with the second winding portion to generate a second force, and the first and second forces drive the support base and magnetic member to move along the magnetization direction of the magnetic member.