Linear bearing used in high-precision zoom lens

Abstract

The invention discloses a linear bearing used in a high-precision zoom lens. The bearing is composed of a housing body, a fixed frame, a sliding frame, and a steel ball assembly. The fixed frame is connected with a zoom lens, wherein a fixed frame chute is provided on the peripheral of the fixed frame. The housing body is covered on one side of the fixed frame. A housing body chute is arranged in the housing body. The sliding frame is covered on another side of the fixed frame. A sliding frame chute is arranged in the sliding frame. The sliding frame chute, the housing body chute and the fixed frame chute form an enclosed steel ball sliding rail. The steel ball assembly is arranged in the steel ball sliding rail. A long chute hole used for exposing the steel balls is arranged on the sliding frame. The steel balls fit with motion components in the zoon lens, and contact the motion components in the zoon lens. The linear bearing is suitable for zooming structures of various high-precision zoom lenses. The motions in an entire zooming process are smooth; optical axis displacement of the zoom lens is effectively reduced; and optical axis consistency precision of the zoom lens is ensured.

Description

technical field [0001] The invention belongs to the technical field of photoelectric products, and in particular relates to a linear bearing for a high-precision zoom lens. Background technique [0002] In the design of zoom lens products, the common method used to ensure the movement of the optical axis during the zooming process is achieved by grinding the guide post and the curved groove. This method is caused by uneven force on the guide post when zooming starts and stops. The movement of the optical axis changes significantly, especially in the environment of strong shock and vibration, and the accuracy of the movement of the optical axis is difficult to guarantee. Contents of the invention [0003] In order to solve the above-mentioned defects in the prior art, the object of the present invention is to provide a linear bearing for a high-precision zoom lens used to ensure that the zoom lens moves smoothly during the entire zooming process, the amount of optical axis ...

AI Technical Summary

Problems solved by technology

[0002] In the design of zoom lens products, the common method used to ensure the movement of the optical axis during the zooming process is achieved by grinding the guide post and the curved groove. This method is caused by uneven force on the guide post when zooming starts and stops. The movement of the optical axis changes significantly, especially in the environment of strong shock and vibration, and the accuracy of the movement of the optical axis is difficult to guarantee

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