Nested Rotatable Trigger Lever for Exterior Damage Protection

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Solution Overview

Problem

Traditional firearm safety mechanisms that rely on exterior body features to prevent accidental discharge can be unsightly and potentially dangerous if the exterior body is damaged.

Innovation Solution

A trigger safety mechanism with a lever component that is nested within the firearm, preventing trigger rotation unless the lever is actuated, providing an additional layer of safety while allowing quick discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional exterior body safety mechanisms are used, then the firearm can prevent accidental discharge, but the exterior body becomes unsightly and potentially dangerous if damaged

Engineering Contradiction:

Improvesafety mechanism reliabilityVSAvoidexterior body appearance and integrity

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The trigger safety lever is nested within the trigger assembly, specifically housed in a cavity within the trigger body. This internal placement protects the safety mechanism from external damage while maintaining a clean exterior appearance, as the lever is not visible from the outside when in the safe position.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The safety function is extracted from the exterior body and relocated to an internal component (the lever within the trigger assembly). This separation allows the exterior body to maintain its aesthetic appearance while the internal lever provides the necessary safety function through a different mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If an internal lever mechanism is added for trigger safety, then safety is enhanced without compromising exterior appearance, but device complexity increases

Engineering Contradiction:

Improvetrigger safetyVSAvoidtrigger assembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The trigger safety lever is merged with the trigger assembly structure, sharing common components such as the trigger bar, housing cavity, and actuation mechanism. This integration minimizes additional complexity by combining the safety function with existing trigger components rather than adding entirely separate systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The lever mechanism serves multiple functions: it acts as a safety switch to prevent accidental discharge, provides a manual override for intentional firing, and integrates with the trigger's existing mechanical structure. This multi-functionality reduces the need for separate dedicated components, thereby limiting complexity increase.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12435938B2Trigger safety with rotatable lever

Publication Date: 2025.10.07 AGENCY ARMS LLC

AI summary

A firearm safety mechanism assembly is provided. The firearm safety mechanism assembly includes a firearm with a receiver, a trigger guard coupled to the firearm, and a housing pin. The firearm safety mechanism assembly includes a trigger safety mechanism. The trigger safety mechanism includes a plate, a rod extending from the plate, a trigger coupled to the rod, and a lever nested within the trigger. The lever includes a lever first end and a lever second end, where the lever rotates between a first position and a second position. In the first position, the lever first end abuts a housing pin.