Firearm Breech Bolt Assembly with Lateral Cocking Handle
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Solution Overview
Problem
Firearms with breech bolt assemblies face challenges in ensuring correct opening and closing synchronism, ambidextrous use, and rapid disassembly without small loose components.
Innovation Solution
The breech bolt assembly features a cocking handle assembled between the breech bolt and slide, with a control pin mechanism and cam guide rails for synchronized movement, allowing ambidextrous operation and easy disassembly by orthogonal positioning of the cocking handle, which is integral to the breech bolt assembly and protrudes laterally through symmetrical ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cocking handle is rigidly connected to the breech bolt and protrudes through a long axial port, then manual intervention on the breech bolt is enabled, but the port length increases and complicates the body structure
Solution Approach 1:
The cocking handle protrudes laterally from the body through a short transverse port rather than axially through a long port. This dimensional change from axial to lateral protrusion reduces the port length requirement while still enabling manual intervention on the breech bolt assembly.
2Ease of manufacture
If the breech bolt assembly uses traditional connection methods with multiple components, then assembly and disassembly can be achieved, but small loose components are required and disassembly becomes time-consuming
Solution Approach 1:
The cocking handle is integrally formed with the breech bolt assembly as a single piece, eliminating the need for separate connection components such as screws, pins, or clips. This merging of components allows rapid assembly and disassembly without small loose parts, reducing disassembly time while maintaining manufacturing simplicity.
3Adaptability or versatility
If the firearm is designed for right-handed operation only, then the design is simplified, but ambidextrous use is not enabled
Solution Approach 1:
The firearm body is designed with symmetrical features including two laterally positioned ports that are mirror images of each other. This controlled symmetry enables the cocking handle to protrude alternately from either side of the body, allowing ambidextrous operation while maintaining design simplicity through repetitive symmetrical elements rather than complex asymmetric configurations.
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 ensures precise synchronism of breech bolt and slide movement, facilitates ambidextrous use, and allows rapid disassembly without tools, minimizing material removal and component loss.
Implementation Method 1
The control pin comprises a main cylindrical body coupled with the seat 21' of the slide and a feeler end 28', for example cylindrical with a smaller diameter, connected to the main body by conical surfaces 28'' complementary to a conical hole 23'' of the cocking handle 23.
Data Source
Figure 1
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Figure 4
AI summary
A firearm with an improved breech bolt assembly comprises a barrel (12), a breech bolt assembly (18, 21), a body (14) equipped on opposite sides with ports (15) for the ejection of a cartridge case, in addition to a magazine (17), wherein the breech bolt assembly, which is moveable with respect to the body (14) comprises a breech bolt-holder slide (21), a breech bolt (18) equipped with a rotating locking head (25), cam guide rails (26, 27) of the relative movement between the breech bolt (18) and slide (21), and also stopping means (28, 29) of the relative movement comprising a control pin (28) which can be moved vertically with respect to a first control seat (29), charged by a recoil spring (30) applied between the slide (21) and the pin (28), said pin (28) having a cocking handle (23), or reloading lever, rotatingly applied thereto, for the manual moving of the breech bolt assembly (10).