Optical Sight Zero-Stop Adjustment Without Dial Movement
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Solution Overview
Problem
Conventional optical sights with a dial that does not move up or down face challenges in implementing a simple zero stop function.
Innovation Solution
An optical sight with an impact point adjustment mechanism that includes a first ring and a second ring, where the first ring is connected to a dial and can rotate in one direction with a zero stop state, and a mechanism for providing a rotation indicator to track rotations, using followers and pins to prevent reverse rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the dial itself does not move up or down when turned (compact structure), then the height of the turret is kept low, but it becomes difficult to achieve a zero stop function with a simple mechanism
Solution Approach 1:
The zero stop function is divided into two independent parts: a first pin that protrudes from the second ring to block reverse rotation, and a first through hole in the second ring that allows the pin to move in and out. This segmentation allows the zero stop function to be achieved without moving the dial itself, maintaining compact structure while preventing reverse rotation through the interaction between the pin and hole.
Solution Approach 2:
The first pin is designed to dynamically protrude and retract based on the rotation state of the first ring. When the first ring rotates in the first rotation direction, the pin protrudes to prevent reverse rotation. When the first ring rotates in the second rotation direction, the pin retracts to allow rotation. This dynamic behavior achieves the zero stop function without requiring the dial to move up or down.
2Reliability
If a first pin protrudes from the second ring to prevent reverse rotation, then the zero stop function is achieved, but the first pin must retract before the first protrusion reaches the position of the first pin
Solution Approach 1:
The first pin is designed to retract automatically before the first protrusion reaches its position through the mechanical interaction between the first ring and second ring. As the first ring rotates in the second rotation direction, the first pin protrudes from the second ring and blocks the first protrusion from advancing. This preliminary action ensures that the zero stop function is reliable without requiring complex timing control mechanisms.
3Ease of operation
If the first ring is rotatable merely in a first rotation direction (zero stop state), then reverse rotation is prevented, but the mechanism must allow rotation in the first rotation direction for adjustment
Solution Approach 1:
The first pin is positioned at a specific location on the second ring to block the first protrusion from advancing in the second rotation direction. This local quality approach allows the mechanism to permit rotation in the first rotation direction while preventing reverse rotation, achieving unidirectional rotation control through a simple localized blocking mechanism rather than a complex overall control system.
Data Source
AI summary
An optical sight includes: an optical system which includes a lens holding tube in which a lens group is housed; a housing which houses the optical system; and an impact point adjustment unit which includes an adjustment mechanism that changes the inclination of the lens holding tube by rotating a dial to move a shaft inserted into the housing up or down without moving the dial up or down. The impact point adjustment unit further includes a first ring that rotates integrally with the dial and a second ring that is provided between the first ring and the housing. The first ring is connected to the adjustment mechanism via a dial in a zero stop state in which the first ring is rotatable merely in a first rotation direction.