Lens driving device

Abstract

The invention discloses a lens driving device comprising a shell, a frame, a carrier, a base, an upper reed and a lower reed, the frame is provided with a magnet group, the carrier is provided with a first coil matched with the magnet group, the base is provided with a second coil matched with the magnet group, and the first coil and the magnet group are matched to drive the carrier to move along the optical axis direction. The second coil is matched with the magnet group to drive the frame and the carrier to move on the plane perpendicular to the optical axis, an elastic piece is arranged between the frame and the shell, the elastic piece is arranged around the frame, and the elastic piece comprises a rectangular frame body, a frame connecting part arranged at the top of the rectangular frame body and a shell connecting part, the frame connecting part and the shell connecting part are fixedly connected with the frame and the shell respectively.

Description

technical field [0001] The invention relates to the field of optics, in particular to a lens driving device. Background technique [0002] With the popularization of smart phones, the application range of mobile phone cameras is increasing. However, most of the sensors of mobile phone cameras are placed in the module outside the motor, and the side FPC uses a flexible circuit board, which causes problems such as warping. The detection is unstable. At the same time, the side FPC adopts a flexible circuit board. Uneven installation will affect the actual movement stroke. The vertical movement part of the carrier in the middle transmits the power of the bottom FPC to the upper reed and then to the coil on the carrier through the suspension wire. Internally, when the motor is impacted or after a long period of operation, the reliability of the suspension wire becomes low, and problems such as breakage are prone to occur, resulting in the failure of the entire motor. In addition...

AI Technical Summary

Problems solved by technology

[0002] With the popularization of smart phones, the application range of mobile phone cameras is increasing. However, most of the sensors of mobile phone cameras are placed in the module outside the motor, and the side FPC uses a flexible circuit board, which causes problems such as warping. The detection is unstable. At the same time, the side FPC adopts a flexible circuit board. Uneven installation will affect the actual movement stroke. The vertical movement part of the carrier in the middle transmits the power of the bottom FPC to the upper reed and then to the coil on the carrier through the suspension wire. Internally, when the motor is impacted or after a long period of operation, the reliability of the suspension wire becomes lower, and problems such as breakage are prone to occur, resulting in the failure of the entire motor

In addition, the carrier, the frame and the base are usually elastically connected through the upper spring and the lower spring. During the movement of the carrier, the restoring force provided by the upper spring and the lower spring is insufficient, which easily makes the reset process of the carrier not sensitive enough. Affect image quality

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