Compact Shotgun Trigger Assembly and Mounting Adapter
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Solution Overview
Problem
Existing underbarrel shotguns lack innovative designs for compactness and efficient mounting solutions, with conventional systems not fully optimizing the integration with long guns for both functionality and adaptability.
Innovation Solution
A compact shotgun design featuring a body member with a breech tube and axially slidable barrel, combined with a compact double-action trigger assembly and a multipurpose adapter system allowing for precise alignment and secure mounting beneath a long gun, utilizing a unique groove and ridge pattern for adjustable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional underbarrel shotgun design is used, then mounting functionality is achieved, but device complexity and adaptability are limited
Solution Approach 1:
The connecting structure incorporates a universal adapter design with multiple groove patterns that can interface with various long gun rail systems. The adapter serves multiple functions: mounting the shotgun to different long guns, providing adjustment capabilities, and maintaining structural integrity, thereby reducing the need for multiple specialized mounting components.
Solution Approach 2:
The mounting system is divided into separate modular components including the connecting structure, adapter, and grooved rail sections. This segmentation allows each component to be optimized independently and enables flexible assembly configurations for different mounting scenarios while simplifying manufacturing and maintenance.
2Volume of moving object
If the shotgun is designed for compactness, then overall size is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The compact shotgun is divided into modular components (barrel assembly, breech tube, trigger assembly, connecting structure) that can be manufactured separately with standardized tolerances and then precision-assembled. This segmentation allows each component to be optimized for compactness while maintaining manufacturability through standard machining processes.
Solution Approach 2:
The design employs nested component arrangements where smaller components are housed within larger ones (e.g., trigger assembly within the body, barrel within the breech tube assembly). This nesting achieves compact overall dimensions while allowing each nested component to be manufactured with appropriate precision for its specific function.
3Volume of moving object
If the trigger assembly is made compact, then overall shotgun size is reduced, but ease of operation may be compromised
Solution Approach 1:
The compact trigger assembly employs local quality optimization by providing full trigger travel and firing pin engagement only in the critical firing zone, while minimizing the overall assembly volume through compact spring placement and streamlined component geometry. The trigger blade maintains adequate length for finger contact while the internal mechanism is densely packed.
Solution Approach 2:
The trigger assembly uses dynamic element arrangement where the firing pin, hammer, and spring are positioned to optimize the firing sequence within a compact volume. The spring provides progressive resistance during trigger travel, and the hammer and firing pin are arranged to achieve reliable ignition despite the reduced overall size.
4Adaptability or versatility
If the barrel is made axially slidable, then adaptability and ease of operation are improved, but device complexity increases
Solution Approach 1:
The barrel assembly includes pre-configured mounting features and alignment elements that are prepared in advance during manufacturing. The connecting structure incorporates pre-positioned grooves and ridges that guide the barrel into correct alignment, eliminating the need for complex field adjustment procedures and reducing operational complexity.
Solution Approach 2:
The barrel is designed with axial slidability that allows dynamic adjustment of barrel position relative to the breech tube. This dynamic capability enables the barrel to be positioned for different ammunition types or shooting scenarios while maintaining a relatively simple mounting mechanism through guided linear motion rather than complex articulated joints.
Data Source
AI summary
A compact shotgun, a trigger assembly that could be used with such compact shotgun or other firearms, and an adapter and multipurpose mount that could be used with firearms or other devices are all disclosed. Each element has separate utility and combined utility in forming a combined under-mounted shotgun and long gun assembly.