Manual precise focusing and self-locking focusing mechanism

Abstract

The invention relates to a manual precise focusing and self-locking focusing mechanism, and aims to solve the problem of unstable performance of a manual focusing mechanism in a severe mechanical environment in the prior art. The mechanism comprises a main frame, a lens cone, a lens, an electrical assembly, a cam assembly, a pin assembly and a worm assembly. The lens is arranged in the lens cone, the lens cone and the electrical assembly are fixedly installed on the central bottom plate, the electrical assembly is located at the rear end of the lens, and the lens cone is provided with a linear groove parallel to an optical axis; the cam assembly comprises a cam sleeved outside the lens cone, worm gear teeth arranged on the cam and a focusing cam groove; the worm assembly comprises a worm and a hand wheel, and the worm vertically penetrates through the central bottom plate and then is meshed with worm gear teeth; the pin assembly penetrates through the linear groove of the lens cone from the focusing cam groove to be fixedly connected with the outer circle of the movable lens set in the lens, and the pin assembly can be driven by the focusing cam groove to move along the linear groove, parallel to the optical axis, in the lens cone to achieve focusing.

Description

technical field [0001] The invention relates to a focus adjustment mechanism, in particular to a focus adjustment mechanism which is used for precise manual focus adjustment of an optical instrument lens and can be automatically locked. Background technique [0002] During the use of many optical instruments, due to changes in environmental factors such as temperature and air pressure, the optical system may be out of focus and cannot work normally. At this time, it is necessary to adjust the focus. With the participation of operators, in order to simplify the electronic control system and reduce the size and weight of equipment, manual focus is usually used. [0003] In order to achieve manual focusing, a motion mechanism is generally used to drive several groups of optical lenses in the optical system to move along the main optical axis, thereby changing the position of the focal plane to achieve focusing. However, in harsh mechanical vibration and impact environments, af...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem in the prior art that the performance of the manual focusing mechanism is unstable under harsh mechanical environments, and to provide a manual fine-tuning and self-locking focusing mechanism, so that after the manual focusing is completed, , the moving mirror group will not change its position due to the mechanical excitation input of the environment

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