Dual Trigger Assembly Preventing Accidental Discharge
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Solution Overview
Problem
Existing trigger assemblies in firearms often have complex designs with many small parts, leading to manufacturing challenges and potential safety issues due to unauthorized modifications for light trigger pulls, which can result in unintended discharges.
Innovation Solution
A simplified trigger assembly design featuring a primary trigger with a central elongated slot and a secondary trigger that interacts with a canted protrusion to prevent accidental discharges by requiring simultaneous pull of both triggers for complete rotation, utilizing a mainspring guide and hammer mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single trigger assembly is used with light trigger pull settings, then quicker and more accurate shots are achieved, but unintended discharges occur due to accidental jostling
Solution Approach 1:
The trigger assembly is divided into two separate trigger blades (first trigger blade and second trigger blade) that operate independently but must both be actuated simultaneously to discharge the firearm. This segmentation allows the trigger pull force to be reduced for faster shooting while preventing accidental discharge through the dual-blade safety mechanism.
2Adaptability or versatility
If complex adjustable trigger assemblies with many small parts are used, then trigger pull adjustment is achieved, but manufacturing difficulty and potential jamming increase
Solution Approach 1:
The adjustment mechanism is integrated directly into the trigger housing structure through a set screw that adjusts the position of the trigger return spring, rather than using separate adjustment components. This merging of functions reduces the number of small parts while maintaining adjustability, simplifying both manufacturing and assembly.
Solution Approach 2:
The trigger housing serves multiple functions: it houses the trigger mechanism, provides the adjustment feature for trigger pull force, and structurally supports the dual trigger blades. This multi-functionality reduces the need for separate components, simplifying manufacturing while maintaining versatility.
3Force
If unauthorized modifications are made to lessen trigger pull force, then lighter trigger pulls are achieved, but safety problems and potential unintended discharges occur
Solution Approach 1:
The dual trigger blade design preemptively counteracts the safety risk of light trigger pull settings by requiring both blades to be actuated simultaneously. This preliminary safety mechanism is built into the design itself, preventing unintended discharge even when trigger pull force is minimized for competitive shooting or hunting applications.
Data Source
AI summary
Applicant has disclosed an improved trigger assembly for firearms, and a related method, to avoid premature firing after an unintentional trigger rotation, especially where light trigger pulls have previously been set. In the preferred embodiment, Applicant's trigger assembly has two triggers: a slotted primary trigger and a secondary trigger which can pivot into the slot. During an intentional trigger pull, the shooter's finger initially pushes against the secondary trigger until it pivots and nestles within the primary trigger's slot. Continued pulling on both the secondary and primary triggers causes a hammer to rotate off a sear, thereby allowing the firearm to discharge. In an unintentional trigger rotation, where the secondary trigger is not pulled back enough to nestle within the primary trigger's slot: an upper portion of the secondary trigger (unseen within the housing) constrains a protrusion on a spring-biased mainspring guide. This blocks movement of the mainspring guide and prevents the hammer from rotating sufficiently for discharge.