Automatic focusing motor and camera module

Abstract

The invention relates to an automatic focusing motor and a camera module, and the motor comprises a fixed part which comprises a pedestal and a housing covering the periphery of the pedestal; the moving part is movably mounted on the base; the coil is wound in the circumferential direction of the moving part; the magnet is arranged on the fixed part and can generate electromagnetic induction with the coil so as to drive the moving part to move along a preset direction relative to the fixed part; the first supporting part is arranged between the fixed part and the moving part in a contact mode and arranged on one side of the motor, the magnets comprise first magnets arranged on the side, corresponding to the first supporting part, of the fixed part, a first magnetic piece is arranged on the side, opposite to the first magnets, of the coil, and the first magnetic piece can generate magnetic attraction force with the first magnets; therefore, the first supporting part is pressed between the fixed part and the moving part. The motion process of the motor is stable, the imaging effect is improved, the magnetic field utilization rate is increased, the driving force is increased, and the motion part is light in weight, small in inertia and high in response speed.

Description

technical field [0001] The present disclosure relates to the field of optical technology, and in particular, to an autofocus motor and a camera module. Background technique [0002] An optical system is a system used for imaging or optical information processing. It can be used in various fields, such as mobile phone cameras, cameras or lenses of projection technology. With the wider application of optical systems, users are more The pursuit of high-definition imaging optical systems, for this reason, the application of autofocus function is favored by the majority of consumers. The auto-focusing process of the optical device is to drive the optical device to move in a predetermined direction, such as moving along the optical axis, to change the focal length. In the related art, the structure of the spring-suspended lens is usually used in conjunction with the driving unit to drive the movement of the lens to realize automatic focusing. For example, Chinese Patent Applicati...

AI Technical Summary

Problems solved by technology

However, this spring-type structure causes the lens to deflect during movement, so that it cannot always move in the specified direction, resulting in shaking of the captured image or video, which affects the imaging quality of the optical imaging system

In addition, the structure with spring suspension has high energy consumption, and the system is prone to resonance when applying closed-loop control, which is difficult to control

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