Firing Pin Channel Spring Mechanism Prevents Accidental Discharge
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Solution Overview
Problem
Firing pins in firearms, particularly in M16 and AK family weapons, lack mechanical means to prevent unintentional discharge due to kinetic energy transfer, leading to accidental firings when the weapon is dropped or debris gets wedged, causing the firing pin to strike the primer unintentionally.
Innovation Solution
The bolt carrier assembly incorporates a firing pin with a channel and a spring mechanism that allows the firing pin to be rearwardly biased, featuring a pivotally connected hammer and cam pin system, and an extractor channel to prevent accidental discharge by ensuring the firing pin is retracted when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a firing pin is designed without mechanical safety means to allow free movement, then the ease of operation is improved, but the reliability deteriorates due to risk of accidental discharge
Solution Approach 1:
The firing pin is designed with a channel and spring mechanism that preliminarily prevents accidental discharge by requiring specific rotational action. The channel geometry and spring bias create a mechanical barrier that must be intentionally overcome through proper manipulation, thereby preventing unintentional kinetic energy transfer while maintaining operational functionality
2Reliability
If a firing pin channel is designed to accommodate spring and firing pin movement, then the reliability is improved by preventing accidental discharge, but the device complexity increases
Solution Approach 1:
The channel structure merges multiple functions into a single integrated component: it guides firing pin movement, accommodates the spring mechanism, provides rotational constraints, and prevents accidental discharge. This consolidation reduces overall device complexity compared to separate components for each function while maintaining reliability
Solution Approach 2:
The channel serves multiple purposes simultaneously: it acts as a guide for linear movement, a constraint for rotational movement, a housing for the spring mechanism, and a safety feature preventing accidental discharge. This multi-functionality achieves reliability without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents accidental discharges by ensuring the firing pin is safely retracted and only engages the primer upon intentional trigger activation, reducing the risk of unintentional kinetic energy transfer.
Implementation Method 1
The bolt carrier assembly incorporates a firing pin with a channel and a spring mechanism that allows the firing pin to be rearwardly biased
Implementation Method 2
When a hammer strikes the rear end of the firing pin, its energy is transferred to the firing pin which responds by moving forward
Implementation Method 3
The bolt carrier assembly incorporates a firing pin with a channel and a spring mechanism that allows the firing pin to be rearwardly biased, featuring a pivotally connected hammer and cam pin system
Data Source
AI summary
An assembly and a method are disclosed. The assembly contains an extractor pin containing a channel, and a firing pin spring configured to accommodate a firing pin, wherein the channel is configured to accommodate the firing pin spring.