Riflescope Turret Zero Stop for Multi-Revolution Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional turrets in riflescopes face challenges in providing precise click feedback for adjustments beyond 15 MOA, leading to difficulties in accurately compensating for bullet trajectory, especially in long-range shooting, and require complex calculations or larger turret diameters, which are not ideal for compact scopes.
Innovation Solution
A turret design featuring a cam pin chassis, stop ring with a spiral groove, and turret cap that allows for a zero stop mechanism, enabling precise tactile feedback and simplified adjustments by mechanically limiting rotations, allowing shooters to rely on gross motor skills without counting clicks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the turret allows more than one revolution to provide 30 MOA or more of travel, then the turret provides sufficient adjustment range for long-range shooting, but the user must perform calculations to determine the actual dial position
Solution Approach 1:
The turret rotation is segmented into distinct revolutions with each revolution representing a specific MOA range (e.g., 0-15 MOA, 15-30 MOA). The user can identify the current revolution and position within it, making it easier to track total adjustment without complex calculations.
Solution Approach 2:
Instead of requiring the user to calculate forward from zero through multiple revolutions, the inverted hash marks provide visual reference points that allow the user to determine position by looking at which segment the turret is in, reversing the mental calculation process.
2Ease of operation
If the turret diameter is increased to space out 1/4 MOA graduations for better click feel, then the click feedback becomes more distinct, but the scope becomes larger and heavier
Solution Approach 1:
The turret dial is segmented into distinct MOA ranges (e.g., 0-15 MOA per revolution). Within each segment, the hash marks are spaced at standard intervals, maintaining adequate click feedback quality without requiring an oversized turret diameter.
Solution Approach 2:
The turret provides additional adjustment range through multiple revolutions rather than increasing the diameter. This adds the dimension of rotational cycles to provide 30+ MOA of travel while keeping the physical size compact.
3Weight of moving object
If the turret is made compact and lightweight for hunting applications, then the scope remains portable and manageable, but the 1/4 MOA graduations become crowded and difficult to feel
Solution Approach 1:
By dividing the total adjustment range into segments (revolutions), each segment contains a manageable number of clicks (e.g., 60 clicks for 15 MOA). This segmentation maintains adequate spacing between graduations in a compact turret, preserving click detection accuracy.
Solution Approach 2:
The inverted hash marks provide visual reference points that compensate for the reduced tactile feedback in a compact turret. Users can visually confirm their position rather than relying solely on tactile sensation of crowded graduations.
4Ease of operation
If the turret provides 15 MOA per revolution with standard graduation spacing, then the click feedback is distinct and easy to feel, but the turret cannot provide sufficient adjustment range for very long-range shots without multiple revolutions
Solution Approach 1:
The turret uses segmented revolutions where each revolution provides 15 MOA of adjustment with distinct click feedback. Multiple revolutions extend the total range to 30 MOA or more, maintaining high-quality tactile feedback within each segment while achieving the required overall adjustment range.
Solution Approach 2:
The solution adds the dimension of multiple rotational cycles to achieve extended adjustment range. Instead of spreading 30 MOA across one revolution (which would crowd the graduations), the system uses two or more revolutions, each providing 15 MOA with properly spaced graduations.
Data Source
AI summary
A turret comprises a turret screw, cam pin chassis, stop ring, and turret cap. The cam pin chassis has a cam pin extending from the chassis parallel with the axis and is linear moveable within the chassis. The stop ring has a first surface and a second surface comprising a spiral groove terminating at first and second stop surfaces. The cam pin engages the spiral groove. The screw extends through central bores of each of the turret cap, stop ring, and cam pin chassis such that they have a common rotational axis. A rotational limit of the turret is defined by one of the first and second stop.