Optical Sight Zero Stop Mechanism with Fixed-Height Dial
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Solution Overview
Problem
Conventional optical sights with a turret mechanism that does not move up or down face challenges in implementing a simple zero stop function.
Innovation Solution
An optical sight with an adjustment mechanism that includes a dial connected to a first and second ring, where the dial rotates integrally without moving, and a zero stop state is achieved through a simple mechanism using protrusions, pins, and followers to prevent rotation in one direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a turret mechanism is used where the dial itself does not move up or down, then the height of the turret can be kept low and the structure can be more compact, but it becomes difficult to implement a zero stop function with a simple mechanism
Solution Approach 1:
The turret mechanism is segmented into multiple functional components: a dial that rotates without vertical movement, a separate lens holding tube that moves up and down, and a zero stop mechanism with pins and protrusions that independently control rotation direction. This segmentation allows the dial to remain compact while the zero stop function is achieved through the interaction of separate elements.
Solution Approach 2:
A lens holding tube is introduced as an intermediary element between the dial and the optical lens. The tube converts the rotational motion of the dial into vertical displacement of the lens, enabling impact point adjustment without requiring the dial itself to move up or down. This intermediary mechanism facilitates the zero stop function while maintaining compact turret height.
2Device complexity
If the dial rotates without moving up or down, then the turret structure can be simplified and compacted, but the mechanism for achieving zero stop function becomes less clear and more complex
Solution Approach 1:
The zero stop mechanism is designed to be self-regulating through the interaction of spring-loaded pins and fixed protrusions. When the dial rotates in the first direction, the pins automatically engage with the protrusions to prevent rotation in the opposite direction. The spring force automatically pushes the pins into engagement positions, eliminating the need for complex external control mechanisms and simplifying manufacturing.
3Ease of operation
If a zero stop function is implemented in a dial-based adjustment mechanism, then the point of impact can easily return to the zero-in adjusted position, but the mechanism becomes more complex and the turret height increases
Solution Approach 1:
Instead of making the dial move up and down to achieve zero stop function, the invention inverts the approach by keeping the dial stationary in the vertical direction and using a separate lens holding tube to perform the vertical displacement. The zero stop function is achieved through rotational constraints on the dial rather than vertical positioning, thereby maintaining compact turret height while preserving ease of operation.
Data Source
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Figure 3A~3B
AI summary
An optical sight (10) includes: an optical system (20) which includes a lens holding tube (21) in which a lens group is housed; a housing (30) which houses the optical system (20); and an impact point adjustment unit (100) which includes an adjustment mechanism (110) that changes the inclination of the lens holding tube (21) by rotating a dial (111) to move a shaft (112b) inserted into the housing (30) up or down without moving the dial (111) up or down. The impact point adjustment unit (100) further includes a first ring (120) that rotates integrally with the dial (111) and a second ring (130) that is provided between the first ring (120) and the housing (30). The first ring (120) is connected to the adjustment mechanism (110) via a dial (111) in a zero stop state in which the first ring (120) is rotatable merely in a first rotation direction.