Zero-Stop Turret With Spiral Groove for Multi-Turn Dial Positioning
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 at long ranges, especially under stressful conditions, and require complex calculations or larger turret diameters, which are undesirable for compact scopes.
Innovation Solution
A turret design featuring a cam pin chassis, stop ring, and turret cap with a spiral groove and pin mechanism that allows for defined rotational limits, enabling intuitive adjustment and return to a zero position without needing to count 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 shots, but the user must perform calculations to determine the actual dial position
Solution Approach 1:
The turret dial is segmented into multiple revolutions with distinct numerical markings for each revolution (e.g., 0-14 for first revolution, 15-29 for second revolution). This segmentation allows users to easily identify their position without calculation by providing visual references for each complete rotation cycle.
2Productivity
If the turret provides 30 MOA of travel in one revolution, then the user needs less than one revolution of travel, but the 1/4 MOA graduations are spaced closer together making it difficult to feel each click
Solution Approach 1:
The patent introduces a second dimension of information display by adding numerical markings for each revolution in addition to the traditional hash marks. This additional dimensional cue allows users to quickly determine their position without relying solely on tactile feedback, effectively decoupling the density of graduations from the ease of position determination.
3Ease of operation
If the turret diameter is increased to make the clicks feel better, then the click feedback is improved, but the scope becomes larger and heavier
Solution Approach 1:
The patent introduces numerical markings as an intermediary information layer between the user and the physical turret mechanism. This intermediary provides positional information without requiring physical changes to the turret size, allowing compact turrets to provide adequate click feedback perception through enhanced informational cues rather than increased physical dimensions.
4Loss of information
If the turret is marked at each graduation starting with 0 and increasing, then the user can see the dial position, but the user must perform calculations when dialing more than one revolution
Solution Approach 1:
The turret dial pre-displays the cumulative MOA value for each revolution (e.g., showing 15-29 for the second revolution instead of resetting to 0-14). This preliminary action of pre-calculating and displaying the cumulative position eliminates the need for users to perform mental calculations, as the dial directly shows the total adjustment amount regardless of the number of revolutions made.
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.