Trigger Mechanism Pivoting Bar for Smooth Firearm Operation
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Solution Overview
Problem
Existing firearms with firing pin safety mechanisms often compromise trigger smoothness and lead to inadvertent discharges due to the space requirements for semi-automatic functions, which sport shooters modify or remove, resulting in operational degradation.
Innovation Solution
A trigger mechanism for hammer-fired firearms that includes a translating and pivoting trigger bar, where the firing pin safety is automatically disengaged after sear disconnection, allowing a smooth trigger pull and compatibility with low bore-axis designs, featuring a two-stage trigger pull and semi-automatic functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a firing pin safety mechanism is incorporated into the trigger mechanism, then safety against inadvertent discharge is improved, but trigger smoothness deteriorates due to interference during trigger pull
Solution Approach 1:
The firing pin safety is disengaged in advance by the pivoting trigger bar before the hammer falls and before the trigger pull is completed. This preliminary action ensures that when the trigger is pulled, the safety mechanism is already out of the way, allowing smooth trigger operation without interference.
Solution Approach 2:
The trigger mechanism is divided into separate functional components: the trigger bar responsible for sear disconnection, the hammer for firing pin actuation, and the firing pin safety as a distinct element. This segmentation allows each component to perform its function independently, with the trigger bar's pivoting motion specifically dedicated to disengaging the safety without affecting trigger smoothness.
2Adaptability or versatility
If space is allocated under the trigger bar for semi-automatic function, then semi-automatic capability is improved, but barrel position deteriorates by being placed farther from the shooter's hand
Solution Approach 1:
The trigger bar is designed to pivot rather than translate linearly, changing the dimensional nature of its motion from one-dimensional translation to two-dimensional pivoting. This dimensional change allows the mechanism to achieve semi-automatic functionality without requiring additional linear space under the trigger bar, thereby maintaining compact barrel positioning.
Solution Approach 2:
The trigger bar transitions from a static or purely translational component to a dynamic pivoting component. This dynamic motion allows the trigger bar to perform multiple functions (disconnecting the sear and disengaging the firing pin safety) within the existing spatial constraints, eliminating the need for additional space that would push the barrel away from the shooter's hand.
Data Source
AI summary
A trigger mechanism and related methods employ translating and pivoting of a trigger bar. A method of operating a firing pin safety includes generating a movement of a trigger bar pivotally coupled with a trigger. A sear is engaged with the trigger bar during the movement of the trigger bar so as to disengage the sear from a hammer. The trigger bar is engaged with the hammer during rotation of the hammer so as to induce a rotation of the trigger bar relative to the trigger. The firing pin safety is engaged with the trigger bar during the rotation of the trigger bar relative to the trigger so as to reconfigure the firing pin safety from an engaged configuration that prevents actuation of a firing pin by the hammer to a disengaged configuration that accommodates actuation of the firing pin by the hammer.