Lens module

Abstract

A lens module includes a first lens barrel, a second lens barrel and a third lens barrel sequentially arranged along the optical axis direction. The second lens barrel is provided with lenses and has internal threads at both ends, and the first lens barrel and the third lens barrel have external threads that can cooperate with the internal threads. One end of the first lens barrel and the third lens barrel close to the second lens barrel is axially extended with an engaging portion, and the engaging portion has a protrusion extending radially along the lens barrel, and the second There are grooves at the internal threads at both ends of the lens barrel, so that the engagement parts of the first lens barrel and the third lens barrel can be inserted into the second lens barrel and rotate in the second lens barrel. The total length and position of the lens module remain unchanged during the focusing process, and there is no need to provide a space for the lens module to move back and forth in the lens seat, thereby reducing the size of the camera.

Description

technical field [0001] The invention relates to a lens module, in particular to an adjustable focus lens module. Background technique [0002] With the development of multimedia technology, digital cameras and video cameras are more and more favored by consumers. While people are pursuing miniaturization of digital cameras and video cameras, they also hope that they can shoot images at different distances at the same location and obtain clear images. The image screen, and the digital camera module used in mobile phones must meet the requirements of thin, light and small, so the focus camera came into being. [0003] During the focusing process of the lens module in a traditional camera, it is often necessary to adjust the distance between the lens module and the image sensing device. During this process, the total axial length of the lens module needs to change or the lens The direction of the optical axis moves, so a space for the lens module to move back and forth must be...

AI Technical Summary

Problems solved by technology

[0003] During the focusing process of the lens module in a traditional camera, it is often necessary to adjust the distance between the lens module and the image sensing device. During this process, the total axial length of the lens module needs to change or the lens module needs to change The direction of the optical axis moves, so there must be a space for the lens module to move back and forth in the lens holder, which increases the size of the entire camera

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