Patent ID: 8867151
Filing Date: 2014-10-21
Classification: G02B,H02K

Abstract:
1. A voice coil motor for driving a lens group, comprising: a hollow housing comprising a top plate and four sidewalls protruding from the top plate, the top plate defining an aperture in a center and a plurality of first fixing holes surrounding the aperture, the sidewalls being connected to each other to form four interior corners; a first cover secured to the top plate of the housing, and comprising a plurality of first protrusions correspondingly inserted into the first fixing holes to position the first cover with respect to the housing; a second cover secured to bottoms of the sidewalls; a movable member movably received in a space defined by the housing and the first and second covers, and comprising a barrel for receiving and being connected to the lens group, and a coil arranged around the barrel, wherein a plurality of tabs extend from a rim of the aperture into the space, and are configured to limit a lateral movement of the movable member in the housing; and a plurality of magnets arranged between the housing and the movable member and stayed in contact with the sidewalls, wherein the magnets drive the movable member and the lens group to move in the housing when a current is supplied to the coil, each of the magnets has a triangular cross-section and comprises a first side, a second side and a third side, the first and second sides enabling each of the magnets to be adhesively fixed into one of the interior corners, and the third side facing one of the tabs.