Patent ID: 8901784
Filing Date: 2014-12-02
Classification: H02K

Abstract:
1. A voice coil motor comprising: a stationary member comprising a stationary frame and a magnetic unit, the stationary frame defining a first receiving room, the magnetic unit consisting of two magnets, the magnets respectively attached to two sidewalls of the stationary frame, the stationary frame comprising an upper surface and four protrusions perpendicularly extending from four corners of the upper surface; a moveable member received in the first receiving room and spaced from the stationary member, the moveable member comprising a moveable frame and coils wrapped around the moveable frame, the coils facing the magnets, the coils and the magnets configured to cooperatively drive the moveable member to move upward from an initial position; an upper resilient plate and a lower resilient plate interconnecting the stationary member with the moveable member, the moveable member positioned between the upper resilient plate and the lower resilient plate, the upper resilient plate and the lower resilient configured for generating a restoring force to drive the moveable member to return to the initial position, the upper resilient plate defining four first positioning holes at four corners of the upper resilient plate; a housing comprising a top panel and four side panels extending from four peripheral sides of the top panel, the housing receiving the stationary member, the moveable member, the upper resilient plate and the lower resilient plate; and a spacer defining four locating holes at four corner of the spacer, the protrusions corresponding to the first positioning holes and the locating holes, wherein the protrusions extend through the first positioning holes and the locating holes the protrusions abut the top panel, the spacer abuts the to panel, and the spacer is positioned between the user resilient plate and the top panel.