Multi-turn Elevation Knob with See-through Indicia for Precision Adjustment
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Solution Overview
Problem
Long-range shooting with firearms requires precise elevation adjustments to compensate for gravity, which can be challenging due to the need for multiple rotations of the elevation adjustment knob, leading to potential inaccuracies in aiming.
Innovation Solution
A multi-turn elevation adjustment knob with see-through portions and indicia that allow shooters to accurately determine the rotational position of the knob, enabling precise adjustments of the sighting lens system, even after multiple full rotations, by aligning specific indicia with these portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standard single-turn elevation knob is used, then the device complexity is low, but the measurement precision of rotational position deteriorates for multi-turn adjustments
Solution Approach 1:
The inner ring is segmented into multiple sections, each with different sets of indicia (first indicia for 0-355 degrees, second indicia for 360-720 degrees). This segmentation allows the knob to provide continuous rotational position measurement across multiple turns without requiring a completely new indicator system for each rotation cycle.
Solution Approach 2:
The see-through portions provide visual feedback to the user about the rotational position of the knob. By aligning specific indicia with the see-through portions, users can accurately determine the angular position of the sighting lens system, reducing errors associated with multiple rotations.
2Adaptability or versatility
If multiple rotations of the elevation knob are required, then the adjustment range is sufficient for long-range shooting, but the ease of operation deteriorates due to potential inaccuracies
Solution Approach 1:
The visual feedback mechanism through see-through portions and aligned indicia allows users to accurately track the rotational position of the knob during multi-turn adjustments. This feedback eliminates the uncertainty that normally accompanies multiple rotations, making the operation as accurate as single-turn adjustments.
Solution Approach 2:
The use of differently styled indicia (first indicia for initial rotation, second indicia for subsequent rotations) provides visual differentiation that helps users understand their current rotation cycle and position, enhancing operational accuracy during multi-turn adjustments.
3Measurement precision
If a multi-turn knob with multiple sets of indicia is implemented, then the measurement precision of rotational position is improved, but the device complexity increases
Solution Approach 1:
Multiple sets of indicia are merged onto a single inner ring, with each set serving a specific rotational range. This consolidation allows the knob to provide continuous rotational position measurement across multiple turns without requiring separate indicator systems for each rotation cycle, managing complexity while maintaining precision.
Solution Approach 2:
The inner ring serves multiple functions by incorporating different sets of indicia that work together to provide continuous rotational measurement across multiple turns. This multi-functional design eliminates the need for separate measurement systems for each rotation cycle.
Data Source
AI summary
An optical device has a post and a reference. A knob is rotatably connected to the optical device and has see-though portions and a gear pivotably disposed therein. The gear has a ring engagement member and a receiver for receiving the post and an inner ring is disposed within the housing. The inner ring includes a first indicia and second indicia. The first indicia are aligned with the plurality of see-through portions when the gear is in a first position. The second indicia are aligned with the plurality of see-through portions when the gear is in a second position. Each of the first and second indicia is associated with a single specific rotated position of the housing relative to the reference.