Firearm Trigger Bar Reducing Travel Distance
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Solution Overview
Problem
Firearms, particularly semi-automatic pistols, face challenges in user preference for trigger feel due to varying travel distances and pull weights, which can affect grip and accuracy, and current configurations often complicate modifications to address these preferences without impacting other performance aspects.
Innovation Solution
A trigger bar design with a longitudinal body, a sear activation tab, and a drop safety lifter tab that reduces total rearward trigger travel distance to less than 0.14 inches, incorporating specific geometries to shorten pre-travel, over-travel, and reset distances, and lower maximum trigger pull weights, enhancing user experience and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the trigger travel distance is reduced to improve user preference and accuracy, then the trigger pull becomes more responsive and accurate, but the engagement distance and safety margins are reduced
Solution Approach 1:
The trigger bar is divided into multiple functional segments: a body portion, a sear engagement portion with sear activation tab, and a drop safety lifter portion with lifter tab. This segmentation allows each portion to be optimized independently for its specific function while collectively achieving the overall goal of reduced trigger travel distance with maintained safety margins.
Solution Approach 2:
The invention utilizes three-dimensional spatial optimization by positioning the sear activation tab and drop safety lifter tab at different locations and orientations on the trigger bar. The tabs engage with sear and drop safety lifter at different heights and positions, effectively reducing trigger travel in the primary direction while maintaining adequate engagement distances through spatial distribution of engagement points.
2Ease of operation
If the trigger pull weight is reduced to improve user preference, then the trigger becomes easier to pull, but the firing mechanism reliability may be compromised
Solution Approach 1:
Different portions of the trigger bar are designed with different geometric properties to optimize local functions. The sear activation tab has specific geometry optimized for clean sear engagement and release, while the drop safety lifter tab has geometry optimized for safety engagement. This local optimization allows reduced overall pull weight while maintaining reliable engagement at each critical point.
Solution Approach 2:
The invention changes geometric parameters of the trigger bar, including tab dimensions, engagement surface angles, and positional relationships between engagement points. These parameter changes optimize the distribution of forces throughout the trigger mechanism, allowing reduced maximum pull weight while maintaining adequate engagement forces for reliable firing mechanism operation.
Data Source
AI summary
A trigger bar for a semi-automatic firearm. The trigger bar includes a longitudinal body with a rearward lateral arm. The arm includes surfaces for engaging the sear and the drop safety lifter of the firearm. The surfaces are configured to reduce trigger pre-travel distances by reducing a trigger travel distance prior to drop safety lifter engagement, sear engagement, and striker release. An over-travel stop reduces a trigger over-travel distance.