Lens driving device

Abstract

The invention relates to a lens driving device. An electromagnetic driving mechanism of the lens driving device includes two circuit boards and two magnet modules, wherein the two circuit boards are attached to the periphery side of a lens mount, and the two magnet modules are fixed on the inner side of a box body. The two circuit boards are arranged in a back-to-back mode, and one or more printed coils are formed on each circuit board. The magnetic modules are opposite to and separated from the printed coils on the two circuit boards respectively. Two or more conductive terminals extend from each circuit board towards a spring component and make electric contact with the spring component, and therefore the spring component serves as a conductive path of the electromagnetic driving mechanism. According to the lens driving device, two sides of the lens mount are directly attached with the circuit boards with the printed coils, and by the conductive terminals which extend from circuit boards towards the spring component and make electric contact with the spring component, the routing and power-supply problems between the two coils are solved, and the device is easy to manufacture and implement, and low in technological requirement.

Description

technical field [0001] The present invention relates to a lens driving device for use in mobile communication equipment, such as mobile phones. Background technique [0002] The conventional voice coil motor type lens driving device uses a flat spring to suspend a lens holder for holding the lens on a case. In addition, a driving coil wound around the optical axis of the lens is mounted on the outer surface of the lens holder, and four driving magnets are symmetrically mounted in the case to radiate the axis of the lens holder. When the driving coil is energized, the driving coil generates a Lorentz force in the direction of the subject and moves the lens holder to a position balanced with the restoring force of the spring, whereby the lens can be moved to a predetermined position . Japanese Patent Laid-Open No. 2007-171764 discloses this type of lens driving device. [0003] However, many mobile communication devices currently on the market require dual camera modules, a...

AI Technical Summary

Problems solved by technology

However, when the coil is made by directly winding the coil on the convex posts on both sides of the lens holder, the outer edge of the coil is prone to warping and deformation, and the size is difficult to control

In addition, it is also possible to wind the hollow coil first and then assemble it on the lens holder. However, it will be difficult to route the wires between the two coils—either too loose or too tight and easy to break, and the coil assembly is not easy to put in place.

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