Firearm Trigger Mechanism Double Over-Center Linkage
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Solution Overview
Problem
Existing trigger mechanisms for bolt-action rifles are unsafe, allowing unintended discharges and do not provide a crisp break with minimal internal friction, which is crucial for precision shooting.
Innovation Solution
A trigger mechanism utilizing a double over-center linkage with a manual safety, minimal trigger pull length, and an externally adjustable trigger force, ensuring safety by preventing unintended discharge through a captive bolt-release mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional trigger mechanisms are used, then the structure is simple, but unintended discharges occur and safety is compromised
Solution Approach 1:
The trigger mechanism is divided into separate functional components: a trigger member for user input, a trigger dog for intermediate control, and a striker dog for final release. This segmentation allows each component to perform its specific function independently, preventing unintended discharge while maintaining operational reliability.
Solution Approach 2:
The trigger dog acts as an intermediary component between the trigger member and the striker dog. It mediates the force transmission and provides an additional control stage, ensuring that the striker is only released when both the trigger is pulled and the trigger dog properly engages, thereby preventing accidental discharge.
2Reliability
If traditional trigger mechanisms are used, then the structure is simple, but internal friction is high and crisp break is not achieved
Solution Approach 1:
The over-center linkages are designed to dynamically transition between locked and released states. The linkages utilize rotational movement around pivot points to create a dynamic system that minimizes internal friction during the trigger pull, enabling a crisp break while maintaining safety through the double over-center configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism minimizes internal friction and ensures safety by requiring a specific force threshold for striker release, providing a crisp break and preventing accidental discharges.
Implementation Method 1
The trigger mechanism utilizes a double over-center linkage to minimize internal friction and ensure safety by precluding unintended discharge by any other means
Data Source
AI summary
Provided is a trigger mechanism having a housing, a trigger member, a trigger dog, and a striker dog. The trigger member is pivotally mounted in the housing, movable between set and pulled positions. The trigger dog is pivotally mounted in the housing and a first lever arm portion of the trigger dog engages a lever arm portion of the trigger member by a first over-center linkage. The striker dog is pivotally mounted in the housing, movable between set and released positions with a lever arm portion engaged to a second lever arm portion of the trigger dog by a second over-center linkage. The over-center linkages are configured to inhibit rotation of the striker dog from the set position to the released position until the trigger member is manipulated from the set position to the pulled position with a force greater than an engagement threshold of the over-center linkages.