Firearm Sight Cam Adjustment and Fiber Retention
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Solution Overview
Problem
Traditional firearm sights, particularly those using fiber optics, face issues with retention and replacement, as the fibers can fall out due to melting, and existing adjustable sights require armorer training for adjustments.
Innovation Solution
The design incorporates a front sight with a longitudinal bore and retention pin to securely hold fiber optics without melting, and an adjustable rear sight with a monolithic structure and cam system for vertical adjustment, allowing users to change fiber optics and adjust sights without specialized training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fiber optic sights are used, then illumination is provided, but the fiber optics can fall out due to melting
Solution Approach 1:
A retention pin is introduced as an intermediary component between the fiber optic and the sight body. The retention pin physically secures the fiber optic in place, preventing it from falling out due to melting or other forces. This mediator component solves the retention problem without requiring the fiber optic itself to resist melting.
Solution Approach 2:
The sight assembly is divided into separate functional components: the sight body, the fiber optic, and the retention pin. This segmentation allows each component to be optimized independently - the retention pin handles the mechanical retention function while the fiber optic focuses on illumination, resolving the contradiction between retention reliability and resistance to melting.
2Measurement precision
If adjustable sights are used, then accuracy is improved, but armorer training is required for adjustments
Solution Approach 1:
The sight adjustment mechanism is designed to be user-operable without requiring specialized armorer training. The cam mechanism allows the shooter to independently adjust the rear sight elevation by simply pressing against the cam with a finger, making the system self-serviceable and eliminating the need for external expertise.
Solution Approach 2:
The complex mechanical adjustment system is replaced with a simplified cam-based mechanism that translates simple linear pressure into precise angular adjustment. This substitution reduces the operational complexity from requiring specialized tools and training to requiring only finger pressure, while maintaining high adjustment precision.
3Ease of manufacture
If monolithic sight structure is used, then manufacturing is simplified, but adjustment mechanism complexity increases
Solution Approach 1:
The sight body and elevation arm are merged into a single monolithic component, simplifying manufacturing by eliminating the need for separate fabrication and assembly of these parts. The cam mechanism is then integrated into this monolithic structure, allowing adjustment functionality to be incorporated without requiring multiple discrete components, thus balancing manufacturing simplicity with adjustment capability.
Data Source
AI summary
An adjustable firearm sight includes a body made of a flexible and resilient material. The body includes an elevation arm connected to the body and extending proximally therefrom to a sight portion, where the elevation arm and the body comprise a monolithic structure. A cam body below the elevation arm has a cam surface in contact with a bottom surface of the elevation arm, where the cam body is rotatable to change a vertical position of the sight portion. Also disclosed is a front sight assembly where a sight element is disposed in a longitudinal bore through a sight body. A proximal end of the longitudinal bore has a reduced size. At a distal end, a retention pin is disposed in a retention bore that extends transversely to and intersects the longitudinal bore such that the retention pin occupies the longitudinal bore to retain the sight element.