Firearm Stock Extension Assembly with Removable Insert
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Solution Overview
Problem
Adjustable firearm stocks that require tools or complex mechanisms for length adjustment can be cumbersome and prone to misadjustment, especially under stressful conditions, and may unintentionally extend beyond the desired length.
Innovation Solution
A firearm stock extension assembly with a removable insert that aligns with specific apertures in the extension frame, featuring distal and proximal detent features to prevent unintentional extension and over-extension, allowing for quick and intentional length adjustment without tools or levers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex mechanism or tools are used for stock length adjustment, then the adjustment can be precise and secure, but the adjustment process becomes cumbersome and time-consuming
Solution Approach 1:
The stock extension assembly is divided into modular components: an extension frame with multiple apertures, a removable insert with detent features, and a pin mechanism. This segmentation allows the system to provide precise adjustment through multiple discrete positions while maintaining ease of operation through simple insert removal and pin insertion, eliminating the need for complex tools or mechanisms
Solution Approach 2:
The detent features on the insert automatically engage with the pin to lock the stock extension at the desired length without requiring additional tools, levers, or complex locking mechanisms. The system serves itself by using the interaction between the detent features and pin to both indicate and secure the adjustment, simplifying the operation while maintaining precision
2Ease of operation
If a simple adjustment mechanism is used, then the operation is quick and easy, but the stock may unintentionally extend beyond the desired length
Solution Approach 1:
The removable insert acts as an intermediary element between the extension frame and the pin mechanism. It provides detent features that mediate the interaction between the pin and the frame apertures, ensuring that the pin can only engage at predetermined, controlled positions. This intermediary structure prevents unintentional extension while maintaining simple operation through straightforward pin insertion
Solution Approach 2:
The patent replaces complex mechanical locking systems with a simpler aperture-pin-deten system. The detent features provide mechanical control through geometric constraints rather than complex springs or levers, achieving reliable extension control through the alignment of apertures and detent features while maintaining quick and easy operation
Data Source
AI summary
A firearm stock extension assembly enables a stock to be collapsed when a firearm is not in active use, and extended from a collapsed configuration directly to the user's preferred stock length. This is accomplished without requiring the user to actuate a lever to release a detent mechanism and without the need for hand tools to adjust the length of the stock. The firearm stock extension assembly includes an insert that defines at least one insert aperture. When properly placed, the insert aperture of the insert lines up with a corresponding extension aperture on the stock. Other than the corresponding extension aperture exposed by the insert aperture, all other extension apertures are concealed by the solid portions of the insert.