LENS DRIVING DEVICE

摘要

The present invention aims to provide a lens driving device which can prevent a lens support from being suspended in an inclined state and can correspond to energizing amount and carry out appropriate linear movement action. A front side primary coil and a rear side primary coil are respectively wound around an axis parallel to an optical axis in a manner of being coaxial to a secondary coil and are combined with each other through electromagnetic induction. The secondary coil is such disposed that its two coil terminals are connected with two ends of a diode respectively. The secondary coil and a permanent magnet assembly are arranged opposite to each other at an interval along the radial direction and a driving current is supplied to the primary coils.

主权项

1. A lens driving device, comprising:
a lens support for retaining a lens; a box body for accommodating the lens support; a spring component for supporting the lens support in the box body in a suspension mode in a direction of an optical axis of the lens; at least one primary coil wound around the optical axis and mounted on an inner side of the box body; a secondary coil coaxial to the at least one primary coil, wound around the optical axis and mounted on an outer peripheral side of the lens support; a permanent magnet or a permanent magnet assembly arranged on the inner side of the box body and arranged opposite to the secondary coil at an interval along a radial direction of the lens; and a diode with its two ends connected with two coil terminals of the secondary coil respectively; wherein electromagnetic induction is generated along with a supply of a driving current to the at least one primary coil, so that a secondary current is generated in the secondary coil, and the diode serially connected between the two coil terminals of the secondary coil enables the secondary current to flow in a preset direction.