Firearm Firing Assembly Trigger Weight Reduction
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Solution Overview
Problem
Existing firearms face challenges in achieving a low trigger weight without compromising shooting accuracy, reliability, or increasing production costs, as methods to reduce trigger weight often require high precision, are not durable, or affect the hammer's firing mechanism.
Innovation Solution
A control element is introduced that is pivotable relative to the hammer, forming a continuous control curve region to engage a release element, reducing the trigger weight by adjusting the lever arm and control curve section geometry, allowing the hammer to move between cocked and firing positions without increasing pivoting space or damaging the trigger assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lever arm is increased to reduce trigger weight, then trigger weight is reduced, but the pivoting space required increases
Solution Approach 1:
The control curve section is designed to extend in the pivoting direction rather than increasing radial distance from the pivoting axis. This dimensional reorientation allows the lever arm to be effectively increased for trigger weight reduction while containing the pivoting space within the housing by utilizing the angular dimension of the control curve's path.
Solution Approach 2:
The control curve section is designed with a variable geometry that adapts during the pivoting motion. The curve's shape changes dynamically along the pivoting arc, allowing optimal lever arm utilization at different angles of the hammer's movement, thereby reducing trigger weight while accommodating the motion within limited space.
2Ease of operation
If the hammer stop notch is positioned closer to the pivoting axis to increase lever arm effectiveness, then trigger weight is reduced, but frictional force increases
Solution Approach 1:
The control curve section employs a curved geometry that optimizes the contact angle between the hammer stop notch and trigger bar throughout the pivoting motion. This curvature ensures that the contact surfaces engage at favorable angles that minimize frictional forces while maintaining the reduced lever arm configuration for low trigger weight.
Solution Approach 2:
The design optimizes multiple parameters simultaneously: the position of the hammer stop notch, the geometry of the control curve section, and the contact surface angles. By carefully adjusting these parameters, the system achieves low trigger weight through increased lever arm effectiveness while minimizing friction through optimized contact geometry.
3Ease of operation
If high precision manufacturing is used to reduce trigger weight, then trigger weight is reduced, but production cost increases
Solution Approach 1:
The firing assembly is divided into modular components with standardized interfaces. The control curve section, hammer, and trigger bar are designed as separate elements that can be manufactured using standard precision processes and then assembled. This segmentation allows each component to be produced efficiently while maintaining the precise geometries needed for low trigger weight.
Solution Approach 2:
The control curve section serves multiple functions: it defines the pivoting path, establishes the lever arm geometry for trigger weight reduction, and provides the contact surface for the hammer stop notch. This multi-functionality reduces the need for additional specialized components, simplifying manufacturing while achieving the desired trigger weight reduction.
Data Source
AI summary
Firing assemblies for use with firearms are described. A firing assembly for use with a firearm includes a hammer pivotably coupled to a hammer shaft. The hammer includes a hammer stop notch that at least partially engages a portion of a lever of a trigger assembly when the hammer is in a cocked position and a control curve section that engages a surface of the lever to retain the lever in an unlocked position as the hammer moves between the cocked position and a firing position. Additionally, the firing assembly includes a control element pivotably coupled to the hammer shaft and adjacent the hammer, wherein the control element includes a first control curve portion that at least partially adjoins the control curve section and wherein the hammer interacts with the control element to change a control curve region as the hammer moves between cocked position and the firing position.