Firearm Trigger Group Selector Relocation for Safe Mode

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Solution Overview

Problem

Existing trigger systems for semi-automatic firearms, such as Hawbaker's, suffer from increased accidental discharge risk due to a selector lever within the trigger guard and lack of safe mode functionality after trigger pull in double fire mode, necessitating a new design that places the selector lever outside the trigger guard and allows safe mode operation even when the trigger is pulled in binary fire mode.

Innovation Solution

A trigger group with a hammer, trigger element, sear, and disconnector assembly, along with a safety selector that moves between safe, semi-automatic, and binary modes, allowing the firearm to be safely placed in safe mode by relocating the selector lever outside the trigger guard and enabling controlled double fire functionality without accidental discharges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the selector lever is placed inside the trigger guard to enable mode switching, then the firearm can change firing modes, but the likelihood of accidental discharge increases

Engineering Contradiction:
Improvefiring mode switching capabilityVSAvoidaccidental discharge risk
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The safety selector lever is extracted from the trigger guard and relocated to the exterior of the trigger guard. This physical separation removes the selector lever from the hazardous zone where accidental manipulation could occur during trigger operation, thereby eliminating the accidental discharge risk while preserving the mode switching capability.

Inventive Principle:
Principle #2Taking out (Extraction)

2Productivity

If the trigger system is designed for double fire mode, then a second shot can be fired upon trigger release, but the firearm cannot be placed in safe mode after trigger pull

Engineering Contradiction:
Improvefiring rate in double fire modeVSAvoidability to switch to safe mode
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The disconnector assembly is designed with dynamic, position-dependent functionality. When the trigger is pulled, the disconnector becomes disengaged from the hammer, allowing mode switching via the safety selector. This dynamic state change enables the user to switch to safe mode during or after trigger pull in double fire mode, providing operational flexibility while maintaining safety control.

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If the selector lever is manipulated within the trigger guard to change firing modes, then mode switching is possible, but the complexity of safe operation increases

Engineering Contradiction:
Improvefiring mode selectionVSAvoidsafety of mode manipulation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The safety selector lever is extracted from the trigger guard and positioned on the exterior. This relocation allows users to change firing modes without placing their fingers inside the trigger guard, eliminating the need for complex and potentially unsafe manipulation techniques while maintaining full adaptability across all firing modes.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS20220034615A1Trigger group for semi-automatic firearms
Publication Date: 2022.02.03 FRANKLIN ARMORY HOLDINGS INC
  • US20220034615A1 patent drawing
  • US20220034615A1 patent drawing
  • US20220034615A1 patent drawing

AI summary

Trigger groups for semi-automatic firearms have a hammer, a trigger element, a sear, a selector, and a disconnector assembly, the disconnector assembly operable when the selector is in a first position to retain the hammer in the cocked position in response to release of the trigger element to the rest position subsequent to discharge of the firearm by pulling the trigger element, and the disconnector assembly operable when the selector is in a second position to release the hammer to the striking position in response to release of the trigger element to the rest position subsequent to discharge of the firearm by pulling the trigger element, such that the firearm discharges once per cycle of the trigger element when the selector is in the first position, and fires once for each forward or rearward motion of the trigger element when the selector is in the second position.