Redundant Sear Trigger Assembly for Firearm Safety
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Solution Overview
Problem
Firearms with traditional fire control units can experience hung striker conditions due to debris or dust, leading to potential unexpected discharges, as the striker may fail to move forward despite the trigger being pulled, posing a safety risk.
Innovation Solution
A trigger assembly with a redundant striker safety mechanism, featuring a second sear that blocks the striker's forward motion if it fails to disengage properly, and an adjustable trigger weight lever to enhance safety and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional single sear mechanism is used, then the device complexity is low, but the reliability is reduced due to hung striker conditions
Solution Approach 1:
The single sear mechanism is segmented into two separate sears: a first sear that releases the striker under normal operation, and a second sear that acts as a safety backup to prevent unintended discharge. This segmentation allows each sear to perform a specific function, improving overall reliability while maintaining manageable complexity through functional specialization.
Solution Approach 2:
The second sear is pre-positioned and pre-configured to engage with the striker before any malfunction occurs. This preliminary arrangement ensures that if the first sear fails to properly release the striker, the second sear is already in position to control the striker's movement, preventing hung striker conditions without requiring complex detection or response systems.
2Adaptability or versatility
If a fixed trigger weight is used, then the manufacturing precision is high, but the adaptability is reduced for different user preferences
Solution Approach 1:
The trigger assembly transitions from a static, fixed trigger weight design to a dynamic, adjustable system. The trigger weight can be modified by the user through a simple adjustment mechanism, allowing the trigger pull force to be customized. This dynamic capability enhances adaptability to different user preferences and shooting conditions while adding minimal complexity through a straightforward adjustment feature.
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 second sear prevents unintended discharges by halting the striker's motion in case of malfunctions, while the adjustable trigger weight lever improves the user experience by allowing customizable trigger pull forces, enhancing both safety and functionality.
Implementation Method 1
A spring has one end connected to an arm of the trigger weight lever and the other end connected to a spring catch with an adjustable position
Data Source
AI summary
A trigger assembly is configured for a firearm having a striker movable along a bore axis between a cocked position and a fire position. The trigger assembly includes a trigger operable between a resting position and a pulled position. A first sear is operably coupled to the trigger and the striker. When the striker is in the cocked position, the first sear is movable from an engaged position to a disengaged position in response to moving the trigger from the resting position to the pulled position. A second sear is movable from a blocking position to a non-blocking position in response to moving the trigger from the resting position to the pulled position. When the trigger is in the resting position, the second sear is positioned to halt forward motion of the striker from the cocked position to the fire position.