Rotary drum driving mechanism and method of lens driving device, lens driving device and image pickup device

Abstract

The invention relates to a drum driving mechanism of a lens driving device, which can solve the technical problem that an existing stator rotor is high in cost. The drum driving mechanism of the lens driving device comprises a shell, wherein a drum is arranged in the shell; wherein the rotary connecting mechanism is connected between the top of the shell and one end, close to the top of the shell, of the rotary drum, and the rotary connecting mechanism enables the rotary drum to rotate around the optical axis and axially fix the rotary drum relative to the top of the shell; the rotor sleeves the outer wall of the rotary drum and is fixedly connected with the rotary drum in the circumferential direction; the stator coil assemblies are evenly distributed on the periphery of the outer circumference of the rotor, and when the stator coil assemblies are powered on in turn, generated electromagnetic force enables the rotor to be subjected to stable torque so as to drive the rotary drum to rotate around the optical axis. The mechanism has the advantages that the relative positions of the stator and the rotor are fixed inconveniently, the cost is reduced, and the camera shooting definition is improved.

Description

technical field [0001] The invention belongs to the technical field of imaging motors, and in particular relates to a rotating cylinder driving mechanism and method of a lens driving device, a lens driving device and an imaging device. Background technique [0002] The camera device is generally applied to a camera motor, and the camera motor has a focusing function. The structure of the existing camera motor includes a lens barrel carrying the lens, and the movement of the lens barrel in the optical axis axis adopts an electromagnetic drive method, and the focusing in this way has a short focusing stroke. Some inventors have improved this, using the cooperation of the stator and the rotor to drive the lens barrel to focus on the optical axis (for example, Chinese Patent Publication No. CN101595429B). This method increases the focusing stroke. The principle of this method is as follows : The stator drives the rotor to rotate. The stator is set on the base or the casing, and...

AI Technical Summary

Problems solved by technology

Some inventors have improved this, using the cooperation of the stator and the rotor to drive the lens barrel to focus on the optical axis (for example, Chinese Patent Publication No. CN101595429B). This method increases the focusing stroke. The principle of this method is as follows : The stator drives the rotor to rotate. The stator is set on the base or the casing, and the rotor is set on the bearing frame. The two are threaded to drive the focus of the bearing frame on the optical axis. Due to the axial rotation and movement of the optical axis following the thread, a large driving force is required, which increases the cost of the stator coil winding. At the same time, the space occupied by the coil winding in the radial direction also increases. At this time, the volume of the motor It will expand, which is not conducive to the development trend of motor miniaturization

[0003] Secondly, the axis of the lens carried by the rotor has poor coincidence with the optical axis, which affects the final imaging resolution

[0004] In addition, the rotor rotates and moves along with the lens. At this time, the stator and the rotor need a longer matching stroke, which will inevitably lead to increased driving costs, and when the stator is longer, the size of the motor in the optical axis direction will be larger. , which is not conducive to the development trend of motor miniaturization

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