Firearm Trigger Overtravel Stop Mechanism
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Solution Overview
Problem
Conventional triggers in bolt-action firearms often exhibit excessive overtravel, which can be disruptive to shooters, and using set screws to limit overtravel becomes complex when the trigger is also used as a bolt release.
Innovation Solution
A trigger device with a housing, a rotatable trigger, a bolt pin, and an overtravel stop mechanism, where the overtravel stop is positioned to inhibit trigger movement either immediately after the break or at a point beyond, providing minimal or adjustable overtravel, and a ticker mechanism that rotates the bolt pin arm to facilitate bolt release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional triggers are used in bolt-action firearms, then the trigger can provide bolt release function, but the trigger exhibits excessive overtravel which is disruptive to shooters
Solution Approach 1:
The patent introduces an intermediary component (overtravel stop mechanism) between the trigger and the trigger group to limit trigger movement. This intermediary element selectively engages with the trigger at specific points in the trigger's travel path to prevent excessive overtravel while maintaining the bolt release function, thereby resolving the contradiction between operational ease and harmful overtravel movement.
Solution Approach 2:
The patent modifies the trigger system by adding adjustable parameters through the overtravel stop mechanism. The stop can be positioned at different locations along the trigger's travel path, allowing customization of the overtravel limit. This parameter adjustment capability enables optimization of trigger feel and function without compromising the bolt release operation.
2Ease of operation
If set screws are used to limit trigger overtravel, then overtravel can be controlled, but the mechanism becomes very complex when the trigger is also used as a bolt release
Solution Approach 1:
The patent designs the overtravel stop mechanism to serve multiple functions simultaneously. The same mechanism that limits overtravel also interfaces with the bolt release operation, eliminating the need for separate adjustment components like set screws. This multi-functional design reduces overall mechanism complexity while achieving both overtravel control and bolt release functionality.
Solution Approach 2:
The patent extracts the overtravel limitation function from the traditional set screw adjustment system and integrates it into a dedicated overtravel stop component. This extraction allows for a more refined and less complex implementation, where the stop component is specifically designed to work with the trigger's movement characteristics without requiring additional complex adjustment mechanisms.
Data Source
AI summary
A trigger device for a bolt action firearm is disclosed. The trigger device comprises a trigger, a housing, a bolt pin, and a bolt pin arm. The trigger is rotatably coupled in the housing via a trigger pivot pin and comprises a trigger stop arm. The bolt pin is moveable between a bolt open position and a bolt closed position in response to positioning of a bolt. The bolt pin arm is rotatably coupled proximal one end to the housing and at another end to the bolt pin. The bolt pin arm comprises an over travel stop configured to selectively engage with the trigger stop arm. In the bolt closed position, the over travel stop is positioned within a travel path of the trigger stop arm. In the bolt open position, the over travel stop is positioned outside of the travel path of the trigger stop arm.