Firearm Trigger Assembly with Interfering Safety Levers
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Solution Overview
Problem
Current trigger assemblies for bolt-action rifles face challenges in balancing safe and reliable operation with user comfort and accuracy, as increased friction and component overlap to prevent accidental discharge can lead to heavy, rough, and uneven trigger pulls, premature wear, and maintenance difficulties due to limited space and exposure to contaminants.
Innovation Solution
A trigger assembly design featuring a housing with rotating levers and a safety mechanism that includes interfering members to selectively restrain the firing pin, incorporating a spring and ball mechanism for smooth trigger pull and a compact safety lever for enhanced safety without increasing trigger pull weight or complexity, allowing for easy maintenance through fluid communication passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction and overlap between trigger assembly components are increased to securely restrain the firing pin and minimize accidental discharge, then safety is improved, but trigger pull weight increases and trigger pull becomes rough and uneven
Solution Approach 1:
The trigger assembly is divided into multiple independent levers (first lever, second lever, third lever) that interact through controlled mechanical interfaces. Each lever performs a specific function in the firing sequence, allowing the system to achieve reliable restraint through distributed mechanical interactions rather than excessive friction at single contact points.
Solution Approach 2:
The patent optimizes the geometric parameters of lever surfaces (such as the angled surface of the first lever and the corresponding surfaces on other levers) to control the mechanical interactions. By carefully designing surface angles and contact geometries, the assembly achieves adequate restraint forces while maintaining smooth trigger pull characteristics.
2Reliability
If friction and overlap between trigger assembly components are increased to securely restrain the firing pin, then safety is improved, but trigger pull weight increases
Solution Approach 1:
The trigger assembly is divided into multiple independent levers (first lever, second lever, third lever) that interact through controlled mechanical interfaces. Each lever performs a specific function in the firing sequence, allowing the system to achieve reliable restraint through distributed mechanical interactions rather than excessive friction at single contact points.
Solution Approach 2:
The patent optimizes the geometric parameters of lever surfaces (such as the angled surface of the first lever and the corresponding surfaces on other levers) to control the mechanical interactions. By carefully designing surface angles and contact geometries, the assembly achieves adequate restraint forces while maintaining smooth trigger pull characteristics.
3Device complexity
If a safety mechanism blocks a single component within the trigger assembly, then the mechanism size is minimized, but the potential for accidental discharge is not sufficiently prevented
Solution Approach 1:
The safety lever integrates multiple interfering members (first interfering member and second interfering member) into a single component that can block multiple levers simultaneously. This merging approach provides enhanced safety by restraining both the first lever and second lever through one safety mechanism, preventing accidental discharge while maintaining a compact design.
Solution Approach 2:
The safety lever serves multiple functions: it includes a first interfering member to block the first lever, a second interfering member to block the second lever, and acts as a safety indicator. This multi-functionality allows comprehensive safety protection without proportionally increasing mechanism size.
4Reliability
If trigger assembly components are made larger to accommodate safety mechanisms that interfere with multiple components, then accidental discharge prevention is improved, but the space allocated within the rifle is exceeded
Solution Approach 1:
The interfering members are positioned within the spatial envelope of the existing lever mechanisms. The first interfering member is positioned near the interface between the first lever and second lever, while the second interfering member is positioned near the third lever, allowing the safety mechanism to utilize existing spaces rather than adding significant volume.
Solution Approach 2:
The safety lever utilizes vertical spacing and angular positioning to achieve multiple blocking functions. By positioning interfering members at different vertical levels and angular orientations, the mechanism provides comprehensive safety coverage without requiring proportional increases in horizontal footprint.
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 design provides a balanced and reliable trigger mechanism with reduced risk of accidental discharge, improved user comfort, and ease of maintenance, maintaining accuracy and extending the rifle's operational life while preventing premature wear.
Implementation Method 1
incorporating a spring and ball mechanism for smooth trigger pull
Implementation Method 2
a safety mechanism including: a first interfering member configured to be positioned in proximity to the first and the second levers on a selective basis so that the first interfering member simultaneously interferes with movement of the first lever from the first to the second angular position of the first lever, and movement of the second lever from the first to the second angular position of the second lever
Data Source
AI summary
Trigger assemblies are provided for initiating the discharge of a firearm. The triggers assemblies include a first and a second lever mounted for rotation within a housing. The first lever is configured to be rotated by the user, and rotation of the first lever imparts rotation to the second lever to initiate the discharge of the firearm. The trigger assemblies have a safety mechanism that includes an interfering member configured to be positioned in proximity to the first and the second levers on a selective basis so that the interfering member simultaneously interferes with movement of both the first and the second levers, and thereby provides multiple points of interference that each prevent discharge of the firearm.