Patent ID: 7652835

Claim:
An optical device, comprising: a drive moving assembly comprising a lens module and a drive coil, wherein the lens module provides an optical axis, and the drive coil surrounds the lens module and provides a central axis parallel to the optical axis; a drive stator, comprising: a housing, the lens module of the drive moving assembly being movably disposed in the housing; a magnetic member surrounding the drive coil of the drive moving assembly, comprising an opening; and a yoke interacting with the magnetic member to generate a magnetic field, comprising a main portion connected to the housing, a first extension portion connected to the main portion, a second extension portion connected to the main portion and separated from the first extension portion, and a third extension portion connected to the first extension portion, wherein the first extension portion surrounds the magnetic member, the drive coil of the drive moving assembly and the magnetic member are disposed between the first and second extension portions, the third extension portion is disposed in the opening of the magnetic member, and the magnetic member, the yoke, and the drive coil interact to generate a force parallel to the optical axis of the lens module of the drive moving assembly, moving the drive moving assembly parallel to the optical axis of the lens module of the drive moving assembly; a brake coil disposed in the opening of the magnetic member of the drive stator and providing a central axis perpendicular to the optical axis of the lens module of the drive moving assembly, wherein the brake coil opposes the drive coil of the drive moving assembly; and a braking resilient member connected between the drive stator and the brake coil and disposed in the opening of the magnetic member of the drive stator, wherein the brake coil interacts with the magnetic member and the yoke of the drive stator, and the braking resilient member and detachably abuts the drive moving assembly.