Firearm Trigger Return and Safety Mechanism
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Solution Overview
Problem
The design of firearms, particularly long guns like carbines, faces challenges in optimizing trigger return and safety mechanisms due to space constraints and ergonomic considerations when using sub-caliber pistol ammunition, as existing mechanisms compete for space within the firearm frame.
Innovation Solution
A trigger return and safety mechanism combination is introduced, featuring a pivotable trigger with a strut having a spring and safety bearing surface, and a movable body that allows or limits pivoting motion based on its position, ensuring efficient trigger reset and safety engagement within the firearm frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional trigger return and safety mechanisms are used in long guns with sub-caliber pistol ammunition, then the mechanisms can perform their basic functions, but the internal layout becomes cluttered and space within the firearm frame is wasted
Solution Approach 1:
The patent combines the trigger return mechanism and safety mechanism into a single integrated assembly. The safety bar is formed as an integral part of the trigger return assembly, eliminating the need for separate components and reducing internal layout complexity while maximizing space utilization within the firearm frame.
Solution Approach 2:
The trigger return assembly serves multiple functions simultaneously: it provides trigger return biasing through the spring, enables safety engagement through the safety bar, and controls trigger pivoting motion. This multi-functionality reduces the number of separate mechanisms needed, thereby improving space utilization and reducing internal layout clutter.
2Reliability
If the body is positioned to engage the safety bearing surface, then trigger pivoting motion is limited for safety, but trigger operation is restricted
Solution Approach 1:
The safety mechanism is designed to be dynamic rather than static. The body can move between engaged and disengaged positions relative to the safety bearing surface on the strut, allowing the system to transition between safe and operational states. This dynamic design ensures reliable safety engagement when needed while allowing full trigger operation when the safety is disengaged.
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 solution enhances the internal layout of firearms by providing effective trigger reset and safety mechanisms that improve ergonomics and operational efficiency, particularly in carbines, by optimizing space usage and ensuring reliable function.
Implementation Method 1
A spring acts between said spring bearing surface and said frame for biasing said trigger into a reset position after said trigger has been pulled
Implementation Method 2
A strut is pivotably attached to said trigger at a strut pivot axis oriented parallel to and offset from said trigger pivot axis
Data Source
AI summary
A trigger return and safety mechanism are mountable on a frame of a firearm. The trigger is mountable on the frame and pivotable about a trigger pivot axis. A strut is pivotably attached to the trigger at a strut pivot axis oriented parallel to and offset from the trigger pivot axis. The strut comprises a spring bearing surface and a safety bearing surface. A spring acts between the spring bearing surface and the frame for biasing the trigger into a reset position after the trigger has been pulled. A body is mountable on the frame, the body being movable between a first position wherein the body is not engageable with the safety bearing surface, thereby allowing pivoting motion of the trigger, and a second position wherein the body is engageable with the safety bearing surface thereby limiting pivoting motion of the trigger.