Zero-Stop Turret Mechanism for Clear Multi-Turn Zero Recall
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Solution Overview
Problem
Conventional telescopic sight turret knobs lack a clear zero-stop mechanism, making it difficult for users to accurately reset to the zero position, especially after long-range adjustments, leading to confusion due to repeated scale markings and limited rotational travel.
Innovation Solution
A zero-stop turret mechanism with a base portion, plunger, and adjustment mechanism, featuring a first and second stop member and a movement limit member, allowing for adjustable rotation limits in both directions, enabling precise setting and recall of the zero position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional turret knobs are used without a zero-stop mechanism, then the device structure remains simple, but users experience confusion and difficulty in accurately resetting to the zero position after long-range adjustments
Solution Approach 1:
The turret mechanism is segmented into distinct functional components: a rotatable adjustment mechanism with scale markings, a separate zero-stop member with a distinct visual indicator, and a base portion. This segmentation allows the zero-stop function to be clearly distinguished from the adjustment scale, providing users with an unambiguous reference point for resetting to zero position without conflating multiple functions into a single indistinct structure.
Solution Approach 2:
The zero-stop member acts as an intermediary element between the adjustment mechanism and the user. Its distinct visual indicator (such as a zero-mark or alignment feature) serves as a mediator that clearly signals the zero position, resolving the confusion that would otherwise arise from interpreting scale markings alone. This intermediary provides a dedicated reference function that simplifies user interaction.
2Adaptability or versatility
If the turret allows multiple full turns for long-range adjustments, then the adjustment range is increased, but users experience confusion due to repeated scale markings making it difficult to track the zero position
Solution Approach 1:
The zero-stop member provides continuous visual feedback throughout multiple rotations. As the adjustment mechanism rotates past the zero position, the zero-stop indicator becomes visible again, providing users with feedback that they have completed a full rotation or returned to the zero reference point. This feedback mechanism prevents loss of positional information during multi-turn adjustments.
Solution Approach 2:
The turret design accommodates excessive rotation (multiple full turns) by providing a zero-stop reference that repeats at regular intervals. Users can rotate the adjustment mechanism beyond a single cycle without losing reference to the zero position, as the zero-stop indicator will appear again after each complete rotation. This allows for the necessary excessive action of multi-turn adjustments while maintaining positional awareness.
3Measurement precision
If conventional click-stop mechanisms are used, then quantization of adjustment is provided, but users still experience difficulty in distinguishing the zero position from other click positions
Solution Approach 1:
The zero-stop member is given distinct local quality that differentiates it from other click-stop positions. This is achieved through visual characteristics such as a zero-mark, different color coding, unique positioning, or special alignment features on the zero-stop indicator. This localized differentiation allows users to easily detect and identify the zero position among multiple identical-sounding click positions, resolving the detection difficulty while maintaining quantization precision.
Data Source
AI summary
A zero-stop mechanism comprises first and second stop members and a movement limit member. The second stop member is releasably secured to an adjustment mechanism. The movement limit member extends around a turret assembly and has a substantially annular main body from which a lug extends. In a first rotational direction of the adjustment mechanism, the second stop member comes into contact with a first side of the lug whereby the main body is rotated in the first rotational direction until a second side of the lug comes into contact with the first stop member. In a second rotational direction of the adjustment mechanism, the second stop member comes into contact with the lug second side whereby the main body is rotated in the second rotational direction until the lug first side contacts the first stop member.