Lens driving telescopic lens barrel structure, lens driving device and image pickup device

Abstract

The invention relates to a lens driving telescopic lens barrel structure, a lens driving device and an image pickup device. The technical problem that the deviation between an existing focusing lens and an optical axis is large is solved. The lens driving telescopic lens barrel structure comprises a base; a rotating cylinder which rotates relative to the base; a telescopic lens cone, wherein one end of the telescopic lens cone is connected with the rotating cylinder in a sleeving manner, and the other end of the telescopic lens cone is far away from the base; a restraining mechanism which is connected to the base and the telescopic lens cone, wherein the restraining mechanism enables the telescopic lens cone to be circumferentially locked relative to the base, and enables the axis of the telescopic lens cone to coincide with the optical axis; a transmission structure which is arranged between the rotating cylinder and one end, sleeved with the telescopic lens cone, of the rotating cylinder, wherein the transmission structure is used for transmitting the rotation driving force to the telescopic lens cone when the rotating cylinder rotates so as to force the telescopic lens cone to axially move on the optical axis. The invention has the advantages that the axial lead of the telescopic lens cone for bearing the lens can be ensured to be always overlapped with the optical axis, and the camera shooting quality is greatly improved on the premise of satisfying large-stroke focusing.

Description

technical field [0001] The invention belongs to the technical field of imaging motors, and in particular relates to a lens-driven telescopic lens barrel structure, a lens driving device and an imaging device. Background technique [0002] Miniature camera telephoto lenses have been widely used in high-end mobile phones, and the pixels of the applied image sensor have also increased from 8 million pixels to more than 100 million pixels, so that the equivalent focal length of the miniature lens is far beyond the thickness of the mobile phone body. Although the periscope motor is a mature solution for mobile phone telephoto cameras, the application of the periscope motor is limited due to the large increase in pixels and the increasing outer diameter of the lens. Therefore, the micro lens barrel retractable camera can not only solve the problem of placing and using the super large pixel telephoto lens on the mobile phone, but also greatly improve the image quality. [0003] Th...

AI Technical Summary

Problems solved by technology

Some inventors have improved this by using the cooperation of the stator and the rotor to drive the focus of the bearing frame 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, and the two are screwed to drive the focus of the bearing frame on the optical axis. Although it has the above advantages, the stator of this method and The lens rotates and moves synchronously, resulting in the need for a long axial cooperating electromagnetic driving force, resulting in a substantial increase in the manufacturing cost of the stator and rotor

[0004] Secondly, there is a large deviation between the axis of the bearing frame and the optical axis. This deviation directly leads to poor final imaging quality, which makes it difficult to meet the requirements of high-precision imaging.

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