Zoom Lens Assembling Precision via Sliding Slot Guide Mechanism
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Solution Overview
Problem
Existing zoom lenses face challenges in achieving high assembling precision and low assembling eccentricity due to the difficulty in processing small guide pins and ensuring thread precision, leading to low precision and high eccentricity in the lens piece set.
Innovation Solution
The zoom lens design incorporates a lens piece bracket with elastic arms and sliders, which are assembled into a single component. This design simplifies the focusing system, reduces component and assembly tolerances, and enhances the fit length between the lens barrel and the lens piece bracket, thereby improving assembling precision and reducing eccentricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a guide pin connected to a zoom lens piece bracket through a thread is used, then the guide pin can drive the lens piece set to move, but the small size of the guide pin makes component processing difficult and thread precision cannot be guaranteed, resulting in low assembling precision and high assembling eccentricity
Solution Approach 1:
The guide pin is divided into separate components: the lens piece bracket and the guide slot structure. Instead of threading a small guide pin into the bracket, the design uses a guide slot with a slider that engages with the lens piece bracket, eliminating the need for small threaded holes and improving manufacturability while maintaining positioning accuracy.
Solution Approach 2:
A slider is introduced as an intermediary component between the lens piece bracket and the guide slot. This slider engages with both the guide slot and the lens piece bracket, transferring motion while avoiding the need for direct threading of small pins, thereby improving both ease of manufacture and assembling precision.
2Manufacturing precision
If a guide pin with outer thread and zoom lens piece bracket with inner thread is used, then threading connection can be established, but the thread precision cannot be guaranteed due to small size, leading to high assembling eccentricity
Solution Approach 1:
The threaded connection is segmented into a slider component and a guide slot structure. The slider replaces the threaded fastener and engages with the guide slot through a sliding mechanism, eliminating thread precision issues while maintaining stable positioning and reducing assembling eccentricity.
Solution Approach 2:
Instead of using internal threading in the lens piece bracket (which is difficult to manufacture with high precision), the design inverts the approach by using an external guide slot structure with a slider. This reverses the manufacturing challenge from internal to external features, achieving better precision and lower eccentricity.
Data Source
AI summary
The present application provides a zoom lens and an electrical device, the zoom lens includes: lens piece set including a first optical lens piece; a lens piece bracket including a bracket main body, where in a first optical lens piece is disposed securely on the bracket main body; a lens barrel sleeved around the lens piece bracket, wherein sliding slots are defined in the lens barrel, an included angle between an extension direction of the sliding slots and a plane in which the lens piece set is located is an acute angle or obtuse angle; a focusing ring sleeved around the lens barrel, wherein guide slots are defined in the focusing ring, and an extension direction of the guide slots is perpendicular to the plane in which the lens piece set is located.