Firearm Rotation Limiting Bumper Pin Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing long guns lack a mechanism to control the rotation of the upper assembly during maintenance or repair, leading to awkward and uncontrolled movement, as there are no mechanisms to prevent wild rotation when attempting to access the interior for cleaning or repair.
Innovation Solution
The implementation of a rotation block with a sliding abutment and actuator system that allows for controlled rotation of the upper assembly, including options for partial or full rotation, and a bumper pin to limit rotation, along with ergonomic designs and attachment methods for stability and ease of handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the upper assembly is allowed to rotate freely during maintenance, then access to the interior is improved, but uncontrolled wild rotation occurs causing awkward handling
Solution Approach 1:
A rotation block is introduced as an intermediary component between the upper assembly and the user's hand. This rotation block includes a bumper pin that acts as a mediator to physically limit the rotation of the upper assembly, preventing wild rotation while still allowing controlled access to the interior for maintenance operations.
2Stability of the object's composition
If a rotation limiting mechanism is added, then rotation control is improved, but device complexity increases
Solution Approach 1:
The rotation control function is segmented into separate components: a rotation block that attaches to the upper assembly and a bumper pin that provides the limiting function. This segmentation allows the complex function of rotation control to be achieved through simple, modular parts that can be easily attached and removed, minimizing overall device complexity.
Solution Approach 2:
The rotation block and bumper pin are designed as simple, inexpensive attachments that can be easily made from basic materials. These components are intended to be temporary additions during maintenance operations, simple enough to be discarded or replaced without concern for cost or complexity.
Data Source
AI summary
A method and apparatus for limiting the amount of rotation of a upper assembly in relation to a sub-assembly is disclosed. The apparatus comprises a pin corresponding to a pinhole of a sub-assembly of a firearm. A bumper is coupled to the pin by a connector. When the pin is placed in the pinhole, the bumper will prevent full rotation of the upper in relation to the sub-assembly while allowing some separation. The method comprises replacing a front pin of a firearm with a pin such that bumper abuts the upper and the sub-assembly when the upper is rotated about the pin. When the upper is rotated, the magazine is removed.