Firearm Reflector Sight Adjustment Assembly
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Solution Overview
Problem
Existing reflector sights for firearms face challenges in protecting the reticule generator from foreign bodies and achieving co-witness with iron sights, especially when mounted low on small firearms like handguns, due to limitations in adjustment assemblies that fail to prevent axial movement of adjustment screws.
Innovation Solution
A reflector sight with a dual-adjustment screw mechanism, where the first screw adjusts the reticule horizontally and the second screw adjusts it vertically, using barrel nuts within perpendicular channels to prevent axial movement of the screws, allowing for precise reticule positioning without exposing the screws to axial movement, thus enabling a compact and sealed design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the adjustment screws are allowed to move axially to adjust the reticule position, then the adjustment mechanism is simpler, but the reticule generator becomes exposed to foreign bodies
Solution Approach 1:
The adjustment mechanism is segmented into two independent functions: axial movement is handled by the barrel nuts moving along the adjustment screws, while rotational adjustment is handled by the adjustment screws themselves. This segmentation allows the screws to remain axially fixed (protecting against foreign bodies) while still achieving full adjustment capability through the combined action of screw rotation and barrel nut translation along perpendicular channels.
Solution Approach 2:
The barrel nuts act as intermediary elements between the adjustment screws and the carrier body. They convert the rotational motion of the screws into controlled axial movement of the carrier, while the perpendicular channel constraints ensure that this conversion happens without exposing the screws to foreign bodies. The barrel nuts mediate the force transmission while maintaining the protective seal.
2Shape
If the sight is mounted low on the firearm to enable co-witness with iron sights, then the mounting position is optimized, but the adjustment assembly becomes more constrained
Solution Approach 1:
The adjustment mechanism utilizes perpendicular channels that extend in orthogonal directions (one horizontal, one vertical). This dimensional arrangement allows the barrel nuts to move independently along each axis without interfering with the other, enabling full two-dimensional adjustment capability within a compact footprint suitable for low-mounted sights on handguns.
Solution Approach 2:
The system transitions from a static, monolithic adjustment assembly to a dynamic mechanism where the barrel nuts can move independently along the perpendicular channels. This dynamic capability allows the adjustment assembly to adapt to the constrained mounting space while maintaining full adjustment functionality through the coordinated movement of multiple components along different spatial dimensions.
3Object-affected harmful factors
If the adjustment screws are sealed to prevent axial movement, then the reticule generator is protected, but the adjustment mechanism becomes more complex
Solution Approach 1:
The adjustment function is segmented between the adjustment screws (providing rotational control) and the barrel nuts (providing axial translation along perpendicular channels). This segmentation allows the screws to be sealed and axially fixed without compromising adjustment capability, as the barrel nuts handle the axial movement component. The sealing complexity is localized to the screw-barrel nut interface rather than requiring a completely redesigned mechanism.
Data Source
AI summary
A reflector sight for a firearm, comprises an adjustment assembly for adjusting the location of a reticule within the field of view. The adjustment assembly comprises: a pair of vertical and horizontal adjustment screws; and a carrier body associated with a reticule generator, the carrier body having a pair of mutually perpendicular channels within which respective substantially cylindrical barrel nuts for the pair of adjustment screws are located. Each channel is configured to allow longitudinal movement of its respective barrel nut along the channel but relative movement perpendicular thereto is constrained, such that rotation of the adjustment screws can move the carrier in the horizontal and vertical directions without requiring any axial movement of the adjustment screws.