Firearm Trigger Assembly with Dual Spring Segmentation
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Solution Overview
Problem
Existing semi-automatic firearm trigger mechanisms are limited in reducing trigger pull weight due to the need for return spring pressure to reset the trigger, and they lack adjustability to achieve desired trigger pull weights, which affects accuracy and reliability.
Innovation Solution
A trigger assembly that resets using forward spring pressure and eliminates it after resetting, allowing minimal trigger pull weight, with adjustable return spring compression to achieve desired trigger pull weights, ensuring reliable operation over repeated uses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If return spring pressure is applied to reset the trigger, then the trigger can be reset to the correct position, but the trigger pull weight cannot be reduced below the spring pressure required to reset the trigger
Solution Approach 1:
The trigger system is divided into two independent spring mechanisms: a first spring that provides forward pressure to reset the trigger, and a second spring that provides return pressure to reset the disconnector. This segmentation allows each spring to perform its specific function independently, enabling the trigger pull weight to be adjusted without being constrained by the reset spring pressure.
Solution Approach 2:
The invention allows independent adjustment of spring compression parameters. The first spring compression can be adjusted to provide minimal forward pressure for resetting, while the second spring compression can be adjusted to provide the desired return pressure. This parameter independence enables the trigger pull weight to be reduced below what would be required if a single spring had to perform both functions.
2Adaptability or versatility
If a single spring provides both forward reset pressure and return pressure, then the mechanism is simple, but the trigger pull weight cannot be adjusted below the minimal return spring pressure needed to reset the trigger
Solution Approach 1:
The trigger mechanism uses two separate springs instead of one combined spring system. The first spring is dedicated to providing forward pressure for trigger reset, while the second spring provides return pressure for disconnector reset. This segmentation enables independent adjustment of each spring's compression, providing adaptability in trigger pull weight while maintaining a relatively simple overall mechanism structure.
Solution Approach 2:
The invention introduces adjustable set screws that allow dynamic modification of spring compression during operation. The first set screw adjusts the compression of the first spring, and the second set screw adjusts the compression of the second spring. This dynamic adjustability enables the trigger pull weight to be customized without changing the fundamental mechanism structure.
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
Enables a minimal and adjustable trigger pull weight, enhancing accuracy and reliability by eliminating return spring tension during trigger pull, allowing for safe and precise firearm discharge.
Implementation Method 1
a first spring to apply forward pressure to the trigger to reset the trigger to a correct position
Implementation Method 2
a second spring to apply return pressure to the disconnector to reset the disconnector after pressure from the shooter's finger is released
Data Source
AI summary
The embodiments described herein include a trigger assembly for a firearm including a rotatable disconnector biased by a detent ball and a return spring to reset the trigger, whereby resetting said trigger causes the rotation of said disconnector to completely decompress said return spring thereby providing no spring pressure on the trigger.