Firearm Trigger Mechanism with Pivoting Lever Safety
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Solution Overview
Problem
Conventional firearm trigger mechanisms suffer from long trigger pulls, uncomfortable or painful reset trigger slap, and inadequate safety mechanisms, leading to increased time between shots and potential accidental firing.
Innovation Solution
The improved trigger mechanism features adjustable trigger pull length, reduced sear pressure, minimized reset trigger slap, and enhanced safety engagement through a pivoting lever mechanism, which includes a disconnector sear with specific edge configurations and a safety mechanism that ensures the firearm remains safe during non-firing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the trigger pull length is reduced to enable faster firing, then the time between shots decreases and productivity improves, but the safety mechanism may become insufficient to prevent accidental discharge
Solution Approach 1:
The trigger mechanism is divided into separate functional components: a trigger element for initiating discharge and a safety mechanism with a pivoting lever for preventing accidental discharge. This segmentation allows each component to be optimized independently - the trigger element for rapid response and the safety mechanism for reliable prevention.
Solution Approach 2:
The pivoting lever acts as an intermediary between the trigger element and the discharge mechanism. In safe mode, the lever physically blocks the trigger sear from engaging the hammer, serving as a mediating barrier that prevents discharge even if the trigger is pulled, thus maintaining safety while allowing rapid trigger response.
2Object-affected harmful factors
If the sear pressure is reduced to minimize reset trigger slap, then user comfort improves and harmful factors decrease, but the engagement reliability may be compromised
Solution Approach 1:
The disconnector sear features a localized recessed underside with a hammer engagement surface that concentrates the engagement area. This local quality modification allows reduced overall sear pressure while maintaining sufficient contact pressure at the specific engagement point, reducing reset trigger slap without compromising reliability.
Solution Approach 2:
The disconnector sear includes a rounded forward most edge and a recessed underside with curved engagement surfaces. These curved geometries distribute contact forces more evenly during engagement, reducing impact shocks and reset trigger slap while maintaining secure engagement.
3Productivity
If the trigger mechanism is designed for rapid reset, then the time between shots decreases and productivity improves, but the complexity of the mechanism increases
Solution Approach 1:
The trigger element and disconnector are combined into an integrated assembly that moves together during trigger pull and reset. This merging reduces the number of independent moving parts and simplifies the reset mechanism while maintaining rapid fire capability through the coordinated motion of the combined components.
Solution Approach 2:
The pivoting lever serves multiple functions: it acts as a safety block in safe mode, a disconnector in normal mode, and a guide for hammer movement during reset. This multi-functionality reduces the need for separate components, simplifying the overall mechanism while enabling rapid reset capability.
Data Source
AI summary
A trigger mechanism for a firearm provides modified and/or adjustable trigger pull length, reduced sear pressure, reduced reset trigger slap, and/or improved engagement of the trigger safety.