Zero Stop Turret Mechanism for Riflescope Adjustment
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Solution Overview
Problem
Conventional turrets in riflescopes face challenges in providing sufficient adjustment range without compromising click feel and turret size, especially for long-range shooting, where shooters need to dial more than 15 MOA, leading to difficulties in accurately returning to the zero position under stress conditions.
Innovation Solution
A zero stop turret mechanism with a simple, compact, and lightweight design featuring a knob, ring, and base with cam-tracks and pins, allowing for nearly two full rotations and a solid stop at the zero position, enabling shooters to rely on feel rather than fine motor skills for quick adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the turret allows more than one revolution to provide sufficient adjustment range, then the adjustment range is improved, but the ability to accurately return to zero position deteriorates
Solution Approach 1:
The zero stop mechanism pre-positions a physical barrier at the zero mark location before the shooter needs to return to zero. This preliminary placement of the stop ensures that when the shooter rotates the turret back, the zero mark aligns with the reference indicator at the predetermined zero position, eliminating the need to count clicks and ensuring accurate zero restoration even after multiple revolutions.
2Adaptability or versatility
If the turret has 30 MOA or more of travel in one revolution, then the adjustment range is improved, but the click feel and graduation spacing deteriorate
Solution Approach 1:
The patent implements a dynamic turret system where the outer turret shell can rotate independently with high precision clicks for fine adjustments, while the entire assembly can also rotate on the scope body for coarse adjustments. This dynamic multi-level rotation system allows the turret to provide both the fine click feel needed for precision and the large total adjustment range needed for long-range shooting.
3Weight of moving object
If the turret is kept small and compact, then the scope size and weight are improved, but the total adjustment range deteriorates
Solution Approach 1:
The patent employs a nested turret structure where an inner turret is contained within an outer turret shell. The inner turret provides precision adjustment clicks, while the outer turret shell can rotate independently to provide additional adjustment range. This nesting allows the scope to maintain a compact size while offering extended total adjustment capability through the combined rotation of both turret levels.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A turret (200) comprises a knob (210), a ring (240) with one or two tracks (242, 250), wherein the one or two tracks are located on the top and/or bottom of the ring; and a base (220), wherein at least one of the knob or base has a pin (230) for insertion into the one or two tracks of the ring.