Firearm Trigger Assembly Debris Management
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Solution Overview
Problem
Existing trigger assembly systems for firearms suffer from debris accumulation, which can lead to malfunctions and require frequent maintenance, and existing solutions are either complex or inefficient.
Innovation Solution
A trigger assembly system comprising a trigger assembly, disconnector assembly, and hammer assembly designed with angled faces, countersunk sidewalls, and debris shrouds to deflect and evacuate debris, reducing accumulation and improving durability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional trigger assembly designs are used, then the structure is simple and easy to manufacture, but debris accumulates in the assembly leading to malfunctions and frequent maintenance
Solution Approach 1:
The trigger assembly is divided into distinct functional modules: trigger housing, disconnector assembly, hammer assembly, and spring assembly. Each module can be independently manufactured, assembled, and maintained. The housing is segmented into multiple walls (first through fourth housing walls) that create separate cavities for different components, allowing debris to be contained and evacuated through dedicated pathways without affecting the entire assembly.
Solution Approach 2:
A disconnector assembly is introduced as an intermediary component between the trigger and hammer assemblies. This disconnector includes a disconnector spring and disconnector member that mediates the interaction between trigger activation and hammer release. The intermediary structure provides additional control over the firing sequence and creates additional pathways for debris evacuation, reducing accumulation in critical areas.
2Ease of manufacture
If debris evacuation features are added to the trigger assembly, then debris accumulation is reduced, but manufacturing complexity increases
Solution Approach 1:
Different regions of the housing are given different geometric properties tailored to their specific functions. The first and second housing walls are configured with specific angles and orientations to deflect debris in particular directions. The third and fourth housing walls create countersunk cavities that concentrate and channel debris toward evacuation points. Each local region's geometry is optimized for its specific debris management role rather than using a uniform design throughout.
Solution Approach 2:
Instead of trying to prevent debris from entering the assembly (which would require complex seals and closures), the design inverts the approach by providing dedicated evacuation pathways that actively channel debris out of the assembly. The housing geometry is designed to naturally guide debris toward exit points through angled surfaces and countersunk cavities, making debris removal as easy as debris entry.
Data Source
AI summary
A trigger assembly improved, having a trigger assembly with first and second shroud side edges that define an angled face. The angled face tapers and is sufficiently wide to partially cover a trigger spring to reduce debris accumulation thereon. First and second housing sidewalls are countersunk and have at least one debris hole. A disconnector assembly has first and second disconnector side faces that define a spring well to house a disconnector spring. The disconnector assembly further has a disconnector shroud and disconnector shroud top face that are sufficiently wide to cover the spring well and the disconnector spring. A hammer assembly has first and second hammer spring mounts to secure a hammer spring. First, second, third and fourth hammer spring shrouds are sufficiently wide to partially cover the hammer spring. The hammer assembly further has first and second debris bevels that extend to first and second hammer sidewalls respectively.