Threaded Trigger Assembly for Precise Pre-Travel Adjustment
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Solution Overview
Problem
Existing adjustable trigger assemblies for firearms require cumbersome and inaccurate methods to adjust pre-travel, involving complete disassembly and bending of metal tabs, which are prone to fatigue and breakage, leading to time-consuming and unreliable adjustments.
Innovation Solution
A trigger assembly with internally threaded receptacles and an externally threaded fastener allows for precise pre-travel adjustments without disassembly, using a driving tool to rotate the fastener within the receptacles for fine adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bendable adjustment tabs are used to reduce pre-travel, then pre-travel can be adjusted, but the adjustment method becomes cumbersome and inaccurate requiring complete disassembly and re-assembly
Solution Approach 1:
The patent replaces static bendable tabs with a dynamic threaded fastener system that allows continuous adjustment of pre-travel distance. The externally threaded fastener can be rotated to precisely control the position of the trigger assembly relative to the trigger bow, enabling fine-tuned pre-travel adjustment without requiring complete disassembly of the firearm.
Solution Approach 2:
The invention segments the adjustment mechanism into distinct modular components: internally threaded receptacles integrated into the trigger bow and an externally threaded fastener. This segmentation allows the adjustment function to be isolated and modified independently, enabling precise pre-travel control while maintaining the integrity of the overall trigger assembly.
2Manufacturing precision
If bendable metal tabs are used for adjustment, then pre-travel can be reduced, but the tabs are prone to fatigue and breakage
Solution Approach 1:
The patent replaces the unreliable bendable metal tabs with a threaded fastener system that is significantly more durable. The fastener and receptacle combination creates a robust mechanical connection that resists fatigue and breakage, eliminating the reliability issues associated with repeatedly bending metal tabs for adjustment.
Solution Approach 2:
The static, irreversible tab bending process is replaced with a dynamic threaded fastener system that allows for reversible and repeatable adjustments. The threading mechanism distributes stress evenly and creates a secure mechanical bond that prevents the fatigue and breakage problems inherent in bent metal tabs.
3Ease of operation
If complete disassembly is required for adjustment, then access to trigger components is achieved, but time is significantly consumed
Solution Approach 1:
The internally threaded receptacles are pre-integrated into the trigger bow during manufacturing, eliminating the need for complete disassembly. The externally threaded fastener is designed to be accessible from the rear of the trigger assembly, allowing users to make adjustments by simply removing the trigger from the trigger guard rather than disassembling the entire firearm.
Solution Approach 2:
The patent introduces an intermediary access point at the rear of the trigger assembly where the externally threaded fastener can be accessed. This intermediary location allows users to make adjustments without requiring complete disassembly of the firearm, significantly reducing the time and complexity of the adjustment process while maintaining full access to the trigger components.
Data Source
AI summary
A trigger assembly apparatus for a firearm which allows adjustment of the pre-travel distance a trigger travels before initiating a firing sequence and method of making the pre-travel adjustment using the apparatus disclosed herein. The apparatus generally comprises a trigger and a trigger bow, with the trigger bow having at least one threaded receptacle in a front lateral portion thereof. The pre-travel adjustment can be achieved by rotating a threaded fastener within the threaded receptacle and the method of adjusting the pre-travel can be accomplished without complete disassembly of the firearm.