Telescopic Sight Dual Focus Control Spiral Track
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Solution Overview
Problem
Conventional telescopic rifle sights lack the capability for both coarse and fine focus adjustments, relying solely on longitudinal movement of the objective lens for image focus adjustment.
Innovation Solution
A telescoping sight with dual focus adjustment controls, featuring a spiral track mechanism that allows for both coarse and fine focus adjustments through interconnected thumbwheels and a planetary gear system, enabling precise movement of the focus lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single focus adjustment mechanism is used, then the device complexity is reduced, but the adaptability for different focus requirements (coarse and fine adjustment) deteriorates
Solution Approach 1:
The patent combines coarse and fine focus adjustment mechanisms into a single integrated system where both adjustment controls operate on the same optical element through a shared transmission mechanism, allowing dual functionality without proportionally increasing complexity
Solution Approach 2:
The focus adjustment system is designed to perform multiple functions (coarse adjustment and fine adjustment) through a unified mechanical structure that accepts different input modes and translates them into appropriate lens movements
2Ease of operation
If a threaded mounting ring is used for focus adjustment, then the ease of operation is improved, but the measurement precision for fine focus control deteriorates
Solution Approach 1:
The focus adjustment function is segmented into two distinct control modes: coarse adjustment for rapid positioning and fine adjustment for precise focusing, allowing each control to be optimized for its specific purpose
3Measurement precision
If a spiral cam track mechanism is added for fine adjustment, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The fine adjustment mechanism is nested within the existing coarse adjustment structure, with the spiral cam track integrated into the mounting ring assembly, allowing compact arrangement and reduced overall complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simultaneous coarse and fine focus control, improving the precision and adaptability of the telescopic sight by allowing for independent adjustment of the focal length, enhancing the user's ability to accurately target at varying distances.
Implementation Method 1
a coarse focus adjustment control being operable to move the moveable lens via a spiral track
Implementation Method 2
a fine focus adjustment control, the fine focus adjustment control being interoperable with the spiral track via a reduced gear ratio mechanism
Data Source
Figure 1A
Figure 1B~1C
Figure 2
AI summary
A telescoping sight having a sight housing, a moveable lens within the sight housing, a course focus adjustment control being operable to move the moveable lens via a spiral track, and a fine focus adjustment control, the fine focus adjustment control being interoperable with the spiral track.