Quick Release Pin Arm Extension for Tool-Free Firearm Takedown
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Solution Overview
Problem
Traditional firearm takedown pins require additional tools for disassembly due to lack of leverage and gripping surface, making maintenance and assembly cumbersome.
Innovation Solution
A quick release pin with a perpendicular arm that acts as a handle, providing mechanical advantage for rotating and removing the pin from its aperture, overcoming static friction and eliminating the need for tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional flush pin is used to secure components, then the pin provides secure locking, but additional tools are required for removal
Solution Approach 1:
The pin design extends from the flush two-dimensional surface into the third dimension by adding a perpendicular arm that protrudes from the pin body. This dimensional extension provides a gripping surface that allows manual removal without tools, resolving the contradiction between secure locking and ease of removal.
Solution Approach 2:
The pin is designed to be self-service by incorporating an integrated arm that serves as both a structural component and a removal handle. The arm provides leverage and gripping surface, allowing the pin to be removed by hand without requiring external tools, thus eliminating the need for separate removal instruments.
2Ease of operation
If a pin with gripping surface is added, then tool-free removal is enabled, but the pin structure becomes more complex
Solution Approach 1:
The arm is merged with the pin body to form an integrated structure. Rather than adding a separate removal tool or attachment, the design combines the locking function (pin body) and removal function (arm) into a single unified component, reducing overall system complexity while improving operability.
Solution Approach 2:
The pin structure is designed with multi-functionality: the pin body provides secure locking when flush with the surface, while the perpendicular arm provides manual gripping and leverage for removal. This multi-functional design enables both secure retention and tool-free removal without requiring separate components.
3Ease of operation
If a perpendicular arm is added to the pin, then leverage for rotation is provided, but the pin extends beyond the frame surface
Solution Approach 1:
The pin is segmented into two distinct functional parts: the pin body that remains flush with the frame surface for secure locking, and the perpendicular arm that extends for providing rotation leverage. This segmentation allows each part to optimize its function without compromising the other, maintaining a clean profile while enabling manual operation.
Data Source
AI summary
A slide assembly quick release pin and arm that secure a recoil assembly within a slide. The pin is inserted through a pair of apertures in a front portion of the slide and through a bore in the nose portion of the recoil assembly aligned between the apertures. As the pin secures the recoil assembly within the slide an arm attached to the end of the pin rests in a recess, flush to the body of the slide in a locked orientation. The pin arm is rotated from a locked orientation within the recess in the assembled configuration to an unlocked orientation out of the recess before the firearm is disassembled. Additionally, the arm acts as a handle for grasping and rotating to provide a mechanical advantage when a user is removing or inserting the pin into the apertures and bore.