Repeating Weapon Bolt Safety Mechanism
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Solution Overview
Problem
Existing repeating weapons lack sufficient safety measures to prevent unintended discharge during rapid repeating with an unlocked bolt, posing a risk of accidental firing.
Innovation Solution
The design incorporates a bolt with a control cam that moves the breech catch element into a safe position when unlocked, and a blocking element that decouples the transfer element from the trigger, ensuring discharge only occurs when the bolt is fully locked, along with an impact safety mechanism using pivotable pendulums to increase trigger resistance against accidental actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bolt is unlocked during rapid repeating, then the weapon can continue firing, but unintended discharge may occur
Solution Approach 1:
The blocking element acts as an intermediary component between the transfer element and the trigger. When the bolt is unlocked, the blocking element prevents the transfer element from actuating the trigger, thereby mediating the interaction to prevent unintended discharge while allowing continuous firing capability
Solution Approach 2:
The control cam performs preliminary action by automatically moving the breech catch element into the safe position before the bolt can be fully unlocked. This preliminary positioning of the blocking element prevents unintended discharge in advance while maintaining firing continuity
2Ease of operation
If the transfer element is connected to the trigger, then the weapon can be discharged, but the trigger may be actuated accidentally during rapid repeating
Solution Approach 1:
The connection between the transfer element and trigger is made dynamic through the blocking element that can be engaged or disengaged based on bolt status. The system transitions from a static connected state to a dynamic conditional connection, allowing trigger actuation only when the bolt is locked
Solution Approach 2:
The blocking element serves as a dynamic intermediary that controls the connection between the transfer element and trigger. It allows the trigger to be actuated when needed (bolt locked) while preventing accidental actuation when the bolt is unlocked
3Adaptability or versatility
If the breech catch element is in the unsafe position, then the bolt can move freely, but the transfer element can be actuated accidentally
Solution Approach 1:
The control cam performs preliminary action by automatically positioning the breech catch element in the safe position before the bolt can be fully unlocked. This advance positioning prevents accidental discharge while maintaining bolt movement freedom during locked state
Solution Approach 2:
The control cam provides feedback from the bolt's positional state to the breech catch element, automatically adjusting the breech catch element's position based on whether the bolt is locked or unlocked, thereby preventing accidental discharge while maintaining operational freedom
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 configuration enhances safety by preventing unintended discharge during rapid repeating and impacts, ensuring the weapon can only be fired when the bolt is fully locked, and provides increased resistance against accidental triggers, thereby improving overall safety.
Implementation Method 1
A control cam (64) is arranged on the bolt body (4) to move the breech catch element (25) into a safe position when the bolt body (4) is moved into the unlocked position
Implementation Method 2
a blocking element (59) cooperating with the transfer element (24) is arranged on the breech catch element (25) to prevent the movement of the transfer element (24) into the release position when the breech catch element (25) is moved into the safe position
Implementation Method 3
the trigger mechanism can have a safety device assigned to the trigger with two pendulums pivotable by impact, wherein the two pendulums are connected to the trigger so that the trigger is forced by at least one of the two pendulums into its initial position during an excursion of the two pendulums caused by impact
Data Source
AI summary
A repeating weapon includes a bolt with a bolt body movable between locked and unlocked positions, and a trigger mechanism with a trigger, a sear movable between cocked and half-cocked positions, a transfer element movable by actuation of trigger between a holding position to hold the sear in the cocked position and a release position to move the sear into the half-cocked position, and a breech catch element movable transversely to the bolt body to limit the axial movement of bolt during opening. A control cam is arranged on the bolt body for moving the breech catch element into a safe position when the bolt body is moved into the unlocked position, and a blocking element cooperating with the transfer element is arranged on the breech catch element for preventing movement of the transfer element into the release position when the breech catch element moves into the safe position.