Firearm Trigger Safety Blade and Latch for Full-Stroke Blocking

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Solution Overview

Problem

Existing firearm safety systems fail to effectively prevent accidental firing by limiting trigger rotation and depression travel.

Innovation Solution

A trigger system with a safety blade and safety latch mechanism that utilizes a resistance member to bias the safety blade and latch into pre-depressed positions, preventing full trigger travel unless intentionally depressed, and allowing full travel upon intentional depression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing safety systems are used, then the trigger can be depressed, but the trigger can still rotate fully allowing accidental firing

Engineering Contradiction:

Improveprevention of accidental firingVSAvoidtrigger rotation freedom

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The safety mechanism is divided into two independent but interacting components: the safety blade that limits trigger rotation and the safety latch that limits trigger depression. This segmentation allows each component to perform its specific safety function independently, preventing accidental firing through rotation or depression while maintaining ease of operation when intentionally activated.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The safety blade acts as an intermediary element between the user and the trigger mechanism. It physically interferes with the trigger housing to prevent full rotation, and through its interaction with the safety latch, it mediates the depression motion. This intermediary structure ensures that accidental rotations are blocked while intentional depressions (after blade retraction) are permitted.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the safety blade limits trigger depression travel, then accidental firing is prevented, but the trigger stroke is reduced

Engineering Contradiction:

Improveprevention of accidental firingVSAvoidtrigger stroke length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The safety blade is designed to be depressed first as a preliminary action before the trigger can complete its full stroke. This preliminary depression retracts the safety blade from its interference position, allowing the trigger to then travel its full stroke length. The two-stage motion (blade depression followed by trigger stroke) ensures safety while maintaining adequate trigger travel for intentional firing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The safety mechanism transitions from a static blocking position to a dynamic cleared position. When the safety blade is depressed, it dynamically retracts and clears the interference path, allowing the trigger to then move freely through its full stroke. This dynamic behavior ensures that the trigger stroke length is maintained during intentional firing while being limited during accidental activation attempts.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the safety latch prevents full trigger travel, then accidental firing is prevented, but the trigger mechanism complexity increases

Engineering Contradiction:

Improveprevention of accidental firingVSAvoidsafety mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The safety blade and safety latch are merged into a single integrated safety assembly that works together through their interaction. The safety blade's depression motion directly actuates the safety latch through their physical engagement, combining two safety functions into one coordinated mechanism. This merging reduces overall complexity compared to having separate independent safety systems for rotation and depression prevention.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The safety blade serves multiple functions: it directly limits trigger rotation by interfering with the housing, and it also actuates the safety latch to limit trigger depression. This multi-functionality means that one component (the safety blade) performs both rotational blocking and depression control, reducing the need for additional separate components and thereby reducing overall mechanism complexity while maintaining high reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances firearm safety by ensuring the trigger cannot fully rotate or travel without deliberate action, thereby preventing accidental firing while maintaining a comfortable user experience.

Implementation Method 1

The resistance member is coupled to the safety latch member and the trigger housing. The resistance member is configured to apply a resistive force between the trigger housing and the safety latch member rotatably biasing the safety latch member along the second pivot member into the first assembled pre-depressed position.

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12480728B2Firearm trigger with safety blade

Publication Date: 2025.11.25 TYRANT DESIGNS CNC LLC

AI summary

A safety trigger system comprising a trigger housing, a safety blade member, a safety latch member configured to interfere with a firearm housing preventing the entire trigger stroke and the release of the firearm firing pin. The safety blade member and the safety latch member disposed within the trigger housing and held into a pre-depressed state through resistance force provided by a resistance member.