Break-Action Rifle Locking Mechanism with Longitudinal Tension
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Solution Overview
Problem
Existing break-barrel rifles with block breeches require precise manufacturing and alignment of parts to ensure reliable locking, as there are no high holding forces in the longitudinal axis, leading to potential play and insecurity in the locking mechanism.
Innovation Solution
Incorporating a tension element actuated by the breech lever shaft that pulls the breech block against the breech case, providing an additional transverse force for secure cohesion between the barrel and receiver, with a pulling element and actuating device that includes fork-shaped actuating elements and a control lever for precise movement and support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the breech block is displaced perpendicularly to the longitudinal axis of the breech case for locking, then the locking mechanism can be simple in structure, but the manufacturing precision and alignment precision must be extremely high to ensure reliable locking and prevent play
Solution Approach 1:
The patent introduces a longitudinal displacement dimension to the locking mechanism. The breech block is displaced not only perpendicularly to the longitudinal axis (as in conventional designs) but also along the longitudinal axis itself. This additional dimensional movement allows the breech block to engage with the barrel part in a way that creates high holding forces in the longitudinal direction, thereby reducing play and improving locking reliability without requiring extremely high manufacturing precision.
2Reliability
If high holding forces are required in the longitudinal axis of the lock case to prevent play, then the locking reliability is improved, but the manufacturing complexity and precision requirements increase significantly
Solution Approach 1:
The patent employs a dynamic locking mechanism where the breech block undergoes a two-stage displacement: first perpendicular to the longitudinal axis (transverse movement), then along the longitudinal axis (longitudinal movement). This dynamic sequence of movements allows the locking surfaces to engage progressively, creating high holding forces in the longitudinal direction while accommodating normal manufacturing tolerances. The dynamic engagement process compensates for minor dimensional variations in the parts.
3Stability of the object's composition
If the breech block is supported from both sides by actuating elements, then the vertical support and stability are improved, but the actuating device complexity increases
Solution Approach 1:
The patent employs asymmetric actuating elements with different functional surfaces. Each actuating element has a first surface for engaging control grooves (providing transverse guidance), a second surface for contact with the breech block (providing vertical support), and a third surface for inclined contact (enabling longitudinal displacement). This asymmetric design with multiple specialized surfaces allows the actuating elements to perform multiple functions simultaneously, achieving stable vertical support from both sides while maintaining a relatively compact and efficient actuating device structure.
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 design enhances locking security by minimizing play and ensuring a strong, secure connection between the barrel and receiver, providing improved reliability and shooting performance.
Implementation Method 1
a tension element which acts on the breech block and can be actuated by the breech lever shaft is arranged in the breech block, by means of which the breech block is pulled against the breech block in its closed position
Data Source
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AI summary
The invention relates to a break-action rifle with a receiver (1), a barrel section (2) tiltably arranged on the receiver (1), and a breechblock (3) movable between a lower open position and an upper closed position by means of a breech lever shaft (8) via an actuating device (9). To enable improved locking, a pull element (29) is arranged in the receiver (1) which engages the breechblock (3) and is actuated by the breech lever shaft (8), and by which the breechblock (3) is pulled against the receiver (1) in its closed position.