Firearm Drive Assembly Trigger Safety Mechanism
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Solution Overview
Problem
Existing firearm drive assemblies with passive safety systems are mechanically complex and difficult to assemble and operate, leading to potential accidental discharges due to intricate structural and functional components.
Innovation Solution
A simplified drive assembly for firearms featuring a hammer, firing pin, and trigger with a transfer bar and spring mechanism, where the hammer has full-cock and half-cock teeth for engagement with the trigger, and a tapered element for precise firing pin displacement, ensuring safe and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission means are added to lock the hammer and control the firing pin, then safety is improved, but device complexity increases
Solution Approach 1:
The trigger is designed as an integrated component that combines multiple functions: it serves as the primary firing mechanism, incorporates a safety tooth for locking the hammer, includes a transfer bar for controlling the firing pin, and integrates a spring mechanism for automatic resetting. This merging of functions into a single trigger assembly eliminates the need for separate safety devices while maintaining safety functionality.
Solution Approach 2:
The trigger assembly performs multiple functions simultaneously: it controls hammer release, provides safety locking through the safety tooth, manages firing pin movement through the transfer bar, and enables automatic resetting through the spring mechanism. This multi-functionality reduces the overall number of components needed in the firearm system.
2Reliability
If multiple transmission means are used to control the firing pin, then safety control is improved, but ease of operation deteriorates
Solution Approach 1:
The trigger integrates the safety tooth, transfer bar, and spring mechanism into a single operational component. When the user pulls the trigger, all these elements work together automatically in a coordinated sequence, eliminating the need for the user to manually operate separate safety controls and transmission means.
Solution Approach 2:
The spring mechanism automatically resets the trigger assembly after firing without requiring manual intervention. The transfer bar automatically engages and disengages the firing pin based on trigger movement, and the safety tooth automatically locks and unlocks the hammer. This self-service operation simplifies user interaction while maintaining safety control.
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
The solution provides a structurally and functionally simple, effective passive safety system that prevents accidental discharges by retracting the firing pin in the safe position and allowing controlled firing pin displacement, enhancing user safety and assembly ease.
Implementation Method 1
a spring for countering/returning the aforesaid transfer bar
Data Source
AI summary
A drive assembly of a firearm includes a hammer, a firing pin, a trigger and drive means for driving the firing pin. The hammer includes a main body having at least a first tooth, a first seat engaged by the firing pin and a second seat engaged by the drive means that intercepts the first seat. The firing pin and the drive means are movable in the respective seats between a first rest portion, distal one from another, and a second firing position, respectively, proximal one to another. The trigger includes a first portion that, when the trigger is pivoted, it is movable between the first and second positions, respectively. The trigger includes a second portion configured to engage/disengage the first tooth and a third portion configured to counter the drive means when the first portion of the trigger is in the second position and the first tooth is disengaged.