Adjustable Forend Mechanism for Rifle Ergonomics and Heat Management
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Solution Overview
Problem
Conventional rifle forends are not ergonomically adaptable to different hand sizes, leading to balance issues during shooting and discomfort due to heat transfer from the barrel, affecting shooting accuracy and safety.
Innovation Solution
An adjustable forend mechanism with a semi-moving structure, featuring a forend lock, lock spring, lock wedge, and lock gear with adjustable threads, allowing users to customize the grip according to their hand size and move the forend away from the barrel to prevent heat damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the forend is designed with a fixed size, then the manufacturing and structural simplicity is maintained, but the ergonomics and adaptability to different hand sizes deteriorate
Solution Approach 1:
The forend is designed with a semi-moving structure that allows it to move away from the barrel, transforming from a static component to a dynamic one. This enables the forend to adapt to different user needs while maintaining a relatively simple overall structure.
Solution Approach 2:
The forend mechanism is divided into separate components including the forend body, lock mechanism, spring, and wedge. This segmentation allows the forend to achieve adjustability through the interaction of simple individual parts rather than requiring a complex integrated design.
2Ease of operation
If the forend is positioned close to the barrel, then the rifle balance and shooting direction control are improved, but heat transfer from the barrel to the forend increases causing discomfort and safety issues
Solution Approach 1:
The forend is designed to be semi-movable, allowing it to be positioned close to the barrel for better control when needed, but also moved away to reduce heat exposure. The lock mechanism with spring and wedge enables this dynamic repositioning.
Solution Approach 2:
The lock mechanism acts as an intermediary between the user's need for control and the harmful heat from the barrel. It provides a mechanical means to achieve control positioning while protecting against heat through the ability to reposition.
3Ease of operation
If the forend is made adjustable for different hand sizes, then the ergonomics and user comfort are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The adjustability feature is achieved through segmented components (forend, lock, spring, wedge) that can be manufactured separately using standard machining processes, then assembled. This avoids the need for complex custom-manufactured adjustable mechanisms.
Solution Approach 2:
The spring-loaded lock mechanism with wedge provides automatic engagement and retention of the forend in its adjusted position. The system self-regulates through the spring force and wedge geometry, eliminating the need for complex adjustment mechanisms or multiple pre-configured positions.
Data Source
AI summary
The invention relates to a forend (1) which can be used in all types of rifles and is adjustable according to the comfort of the user. The subject of the invention particularly relates to an improved design realized for the forend mechanism which can be adapted to the rifles such as bullpup, air rifles and firearms, can be adapted to any hand structure with its ergonomic structure.