High-precision rapid automatic focusing mechanism

Abstract

The invention discloses a high-precision rapid automatic focusing mechanism. The high-precision rapid automatic focusing mechanism comprises a fixed seat, a multi-head tooth socket, a stepping motor and a gear set, and the fixed seat is provided with a cylinder part for accommodating a connecting lens seat; the cylinder part and the connecting lens seat are provided with axial limiting structures;the multi-head tooth socket is arranged at the port of the fixed seat cylinder part; the multi-head tooth socket is provided with an interface ring and a gear outer ring; the interface ring is provided with an external thread and an internal thread; the output end of the stepping motor is matched with the gear outer ring of the multi-head tooth socket through a gear set to output torque; and whenthe multi-head tooth socket is driven to rotate, the external thread of the multi-head tooth socket is in threaded connection fit with the cylinder part of the fixed seat, and the internal thread ismatched with the connecting lens seat at the same time, so that the connecting lens seat linearly moves along the axial direction of the cylinder part of the fixed seat under the guidance of the axiallimiting structure to realize a rapid focusing function.

Description

technical field [0001] The invention discloses a high-precision and fast automatic focusing mechanism, which belongs to the technical field of single-focus lens focusing mechanisms according to the International Patent Classification (IPC). Background technique [0002] The existing auto-focus lens usually passes the gear through the motor, and then turns the large gear adjustment ring to drive the cam groove (three), so that the lens installed on the mechanism can be automatically focused. The cam groove is designed in a spiral shape, and the focusing speed is slow. , the return gap is large, which cannot meet the fast and high-precision focusing function. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a high-precision and fast auto-focus mechanism, so that the lens mounted on the mechanism can focus quickly and accurately. [0004] To achieve the above object, the present invention is achieved through the f...

AI Technical Summary

Problems solved by technology

[0002] The existing auto-focus lens usually passes through the gear through the motor, and then turns the large gear adjustment ring to drive the cam groove (three), so that the lens installed on the mechanism can be automatically focused. The cam groove is designed in a spiral shape, and the focusing speed is slow. , the return gap is large, which cannot meet the fast and high-precision focusing function

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