Lens driving motor

Abstract

The invention discloses a lens driving motor, which comprises a shell, an upper elastic piece, a lower elastic piece, a permanent magnet, a fixed coil, a magnetic yoke and a lens carrier, and is characterized in that the outer side of the upper elastic piece is fixedly connected with the upper part of the shell, the inner side of the upper elastic piece is connected with the top edge of the lens carrier, the outer side of the lower elastic piece is fixedly connected with the lower part of the shell, the inner side of the lower elastic piece is connected with the bottom edge of the lens carrier, the magnetic yoke is arranged between the upper elastic piece and the lower elastic piece, the fixed coil is arranged at the inner side of the magnetic yoke, and the permanent magnet is fixed at the outer side of the lens carrier. The lens driving motor adopts the fixed coil, thereby avoiding traction imposed on a coil leading-out wire by movements of the coil, and prolonging the service life. In addition, the lens driving motor is provided with a guide column I and a guide column II, thereby enabling a lens not to generate offset on a plane which is perpendicular to the optical axis, and improving the shooting quality.

Description

Technical field [0001] The patent of the present invention relates to a driving motor, in particular to a lens driving motor used in a video camera, a camera or an electronic device with a photographing function. Background technique [0002] At present, because voice coil motors have the advantages of small size, low power consumption and low price, voice coil motors have been widely used as actuators in electronic products, especially in camera modules (such as mobile phone cameras). The device basically uses a voice coil motor. A traditional voice coil motor usually includes a lens carrier, a housing, an upper shrapnel, a lower shrapnel, a coil, and a magnet. Generally, the magnet is fixed in the housing, and the coil is connected to the lens carrier. The coil is used to drive the lens carrier to move. When the force moves, the wire drawn by the coil will also be pulled by the coil, so that the lead wire is easily damaged. The position of the lens carrier is restricted by the...

AI Technical Summary

Problems solved by technology

A traditional voice coil motor usually includes a lens carrier, a housing, an upper shrapnel, a lower shrapnel, a coil, and a magnet. Generally, the magnet is fixed in the housing, and the coil is connected to the lens carrier. The coil drives the lens carrier to move. Because the coil will When the force moves, the wires drawn out of the coil will also be pulled by the coil, so that the wires drawn out are easily damaged. The position of the lens carrier is limited by the upper elastic piece and the lower elastic piece. Due to the elasticity of the upper elastic piece and the lower elastic piece, the coil carrier can not only Moving in the direction, it can also move on the plane perpendicular to the axial direction

In this way, when the lens module is driven to work, it is likely that the elastic deformation of the shrapnel on the plane perpendicular to the axial direction will cause the lens accommodated in the sleeve to produce a certain offset on the plane perpendicular to the optical axis, so that The optical axis cannot be focused, which affects the quality of the shot

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