Grip Safety Interlock Prevents Accidental Firearm Discharge
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Solution Overview
Problem
Existing firearm safety mechanisms can be inadvertently activated or deactivated by external forces, posing a risk of accidental discharge, particularly in environments where the firearm is handled roughly or by inexperienced users.
Innovation Solution
A grip safety interlock system that includes a grip with an internal recess, an extended detent pin, a grip safety lever, and a lever bias spring, which prevents the safety selector from being rotated from the 'safe' to 'fire' position without intentional user action, ensuring the firearm remains in a safe state unless the grip safety lever is squeezed and pivoted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional manual safety mechanism is used, then the firearm can be easily controlled by simple lever or button toggling, but the safety can be inadvertently activated or deactivated by external forces
Solution Approach 1:
The grip safety lever is nested within the grip structure, with the lever pivotably positioned inside the grip's internal recess. The extended detent pin extends through the grip into the lower receiver, creating a nested arrangement where the lever and pin work together within the grip's internal space to provide both ease of operation and protection against inadvertent activation.
Solution Approach 2:
The extended detent pin acts as an intermediary element between the grip safety lever and the safety selector. The pin engages with the safety selector to prevent rotation, while simultaneously being interacted with by the lever through the interference ledge and interference abutment surface, thereby mediating the interaction between the user's hand and the safety mechanism.
2Speed
If the safety selector is made easily accessible for quick switching, then the firearm can be rapidly switched between safe and fire positions, but the safety mechanism becomes vulnerable to external forces and rough handling
Solution Approach 1:
The grip safety lever is nested within the grip structure, providing a protected path for user interaction while shielding the critical detent pin and safety selector from external forces. The nested arrangement allows quick switching through the lever's pivot motion while the pin remains protected within the grip's internal recess and lower receiver.
Solution Approach 2:
The safety mechanism is segmented into distinct functional components: the grip safety lever for user interaction, the extended detent pin for mechanical interference, and the safety selector for position indication. This segmentation allows each component to be optimized for its specific function while working together to provide both rapid switching and protection against external forces.
3Reliability
If a robust safety mechanism is implemented to prevent inadvertent activation, then the reliability of the safety system is improved, but the device complexity increases
Solution Approach 1:
The grip safety lever and extended detent pin are merged into a single integrated assembly that works together within the grip structure. The lever and pin are positioned such that their interaction through the interference ledge and interference abutment surface provides robust safety functionality while maintaining a compact, integrated design that does not significantly increase overall device complexity.
Solution Approach 2:
The robust safety mechanism is achieved through nesting the lever and pin within the grip's internal recess, allowing the complex interaction between these components to occur within the existing grip structure rather than requiring additional external components. This nested arrangement provides reliability while minimizing the increase in device complexity.
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
Enhances the security of firearm safety mechanisms by preventing accidental activation or deactivation, reducing the risk of unintended discharge, especially in scenarios where the firearm is subjected to external forces or handled by inexperienced users.
Implementation Method 1
A lever bias spring may push the grip safety lever to the first interference pivot position such that the interference ledge of the grip safety lever abuts the interference abutment surface of the extended detent pin
Data Source
AI summary
An example grip safety interlock can include a lower receiver with a trigger assembly, a safety selector having a detent channel, a grip having an internal recess, an extended detent pin having a detent point and an interference abutment surface, a grip safety lever having an interference ledge, and a lever bias spring positioned within the grip, extending between the grip and the grip safety lever. The grip safety lever can be positioned to pivot within the internal recess of the grip, and the extended detent pin can extend within the grip such that the detent point contacts the detent channel of the safety selector. The lever bias spring can push the grip safety lever to a first pivot position such that the interference ledge of the grip safety lever abuts the interference abutment surface of the extended detent pin to prevent movement and rotation of the safety selector.