Automatic zooming module device

Abstract

The invention relates to an automatic zooming module device, which comprises a shell consisting of an upper cover and a base. A lens extending from the inside of the upper cover and a stepper motor for driving the lens to extend and retract are arranged in the shell. The lens is fixed on a lens mount positioned in the shell. The stepper motor is connected with the lens mount by a transmission assembly. The transmission assembly comprises an output threaded rod which is connected to an output shaft of the stepper motor and rotates synchronously with the output shaft. A nut is sleeved on the output threaded rod. Both a screw thread on the output threaded rod and a screw thread on the nut matched with the output threaded rod are transmission screw threads. The nut is fixedly connected with the lens mount. A guide post which is fixed in the shell and guides the lens mount to take linear motion along the output threaded rod is movably inserted into the lens mount. The guide post is parallel to the output threaded rod. The automatic zooming module device of the invention has the advantages of large range of focusing travel and precise and accurate focusing and positioning, is provided with a zero position detection device, meets requirements of the market and is valuable for popularization and use.

Description

technical field [0001] The invention relates to an automatic zoom module device. Background technique [0002] At present, there are two main ways of lens zooming on the market, one is manual focusing, which is a focusing method that adjusts the camera lens by manually turning the focus ring so that the photos taken by the camera are clear. To a certain extent, it depends on the judgment of the human eye on the image on the focusing screen, the proficiency of the photographer, and even the vision of the photographer, resulting in inaccurate positioning of the manual focus method; early SLR cameras and rangefinder cameras basically use manual focus To complete the focusing operation, the current quasi-professional and professional digital cameras, as well as SLR digital cameras all have a manual focus function to meet different shooting needs. The other is VCM (Voice Coil Motor) automatic zoom. VCM refers to the voice coil motor in electronics. The voice coil motor is a kind...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two main ways of lens zooming on the market, one is manual focusing, which is a focusing method that adjusts the camera lens by manually turning the focus ring so that the photos taken by the camera are clear. To a certain extent, it depends on the judgment of the human eye on the image on the focusing screen, the proficiency of the photographer, and even the vision of the photographer, resulting in inaccurate positioning of the manual focus method; early SLR cameras and rangefinder cameras basically use manual focus To complete the focusing operation, the current quasi-professional and professional digital cameras, as well as SLR digital cameras are equipped with manual focus functions to meet different shooting needs

The other is VCM (Voice Coil Motor) automatic zoom. VCM refers to the voice coil motor in electronics. The voice coil motor is a kind of motor. Because the principle is similar to that of a speaker, it is called a voice coil motor. The travel range of the voice coil motor is small. , its function is to correctly focus the light spot on the objective lens, and it is used on mobile phone or computer camera. The VCM automatic zoom method has the disadvantage of small focus travel range

Moreover, neither the manual focusing method nor the VCM automatic zooming method has a zero point detection device. Due to the characteristics and driving mode of the stepping motor, there will be a maximum error of one degree when the stepping motor is controlled to return to the mechanical zero point, which cannot ensure accurate and reliable focusing readings. , it is easy to cause inaccurate focusing readings, affect people's normal use, and bring inconvenience to people's work and life

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