Firearm Bolt Assembly Elastic Protrusion Safety Mechanism
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Solution Overview
Problem
The risk of accidents during firing in bolt-action rifles with removable bolt heads exists when the bolt head is not properly assembled, as the bolt can be inserted into the receiver without it, leading to potential shell splitting, hot air expulsion, and firing pin projection.
Innovation Solution
Incorporating a protruding element, such as a cantilever spring, that prevents the bolt assembly from being inserted into the receiver unless the bolt head is correctly attached, ensuring the element contracts to allow smooth insertion only when the bolt head is securely connected to the bolt body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bolt head is made removable from the bolt body, then the rifle can be adapted for different calibre ammunition shells, but the risk of accidents increases when the bolt head is not properly assembled
Solution Approach 1:
The protruding element is configured to prevent insertion of the bolt assembly into the receiver when the bolt head is not properly assembled. This preliminary blocking action prevents the dangerous scenario where the bolt could be inserted without the bolt head, thereby eliminating the risk of shell splitting, hot air expulsion, and firing pin projection before these hazards can occur.
Solution Approach 2:
The protruding element acts as an intermediary mechanism between the bolt head assembly and the receiver. It mediates the interaction by physically blocking the insertion path when the bolt head is missing or improperly assembled, and by retracting to allow insertion when the bolt head is correctly in place, thus ensuring safety without compromising the removable bolt head design.
2Reliability
If a protruding element is added to prevent bolt assembly without bolt head, then safety is improved, but the device complexity increases
Solution Approach 1:
The protruding element is localized to a specific position on the bolt assembly where it is most effective - preventing insertion when the bolt head is missing. This localized solution adds minimal complexity only where needed, rather than requiring a complete redesign of the entire bolt assembly system.
Solution Approach 2:
The protruding element changes its state (protruding vs. retracted) based on the assembly condition of the bolt head. This parameter change approach allows a single component to provide safety functionality without requiring multiple separate mechanisms, thereby 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
This solution ensures the bolt assembly is always fully assembled, eliminating the risk of accidents by preventing the bolt from being inserted without the bolt head, providing a simple, effective, and intuitive mechanism to ensure proper assembly.
Implementation Method 1
it includes at least one protruding element that tends to protrude elastically from the body, so that when allowed to protrude elastically unhindered, the bolt assembly cannot be inserted inside the inner cavity of the receiver
Data Source
AI summary
A bolt assembly for a firearm, wherein the bolt assembly is intended to move inside an inner cavity of a receiver of the firearm and comprises a body, a removable bolt head, at least one protruding element that tends to protrude elastically from the body, so that when allowed to protrude elastically unhindered, the bolt assembly cannot be inserted inside the inner cavity of the receiver. The connection of the bolt head to the body causes the protruding element to elastically contract, enough to allow the bolt assembly to be inserted inside the inner cavity of the receiver. Thus, a single elastic protruding element enables the user to be warned if trying to assemble the body without the bolt head into the receiver.