Arrow Magazine Retainer for No-Arrow Detection
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Solution Overview
Problem
Conventional arrow magazines suffer from structural limitations that lead to damage and inconvenience due to the hooking arm's recessed portion interacting with the bowstring, causing reduced durability and limited design flexibility.
Innovation Solution
An arrow magazine structure with a flexible abutting unit and retainer mechanism that prevents string-pulling by using a presser with a contact portion that abuts against arrows, and a retainer that stops the bowstring when the magazine is empty, enhancing durability and allowing for diverse design options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hooking arm is provided with a recessed portion to hook the bowstring when the arrow magazine is empty, then the bowstring pulling is limited, but the recessed portion is damaged by the pulling force and reduces the durability of the arrow magazine
Solution Approach 1:
The patent extracts the bowstring-limiting function from the hooking arm's recessed portion and transfers it to a separate retainer component. The retainer includes a limiting portion that specifically engages with the bowstring to prevent over-pulling, while the hooking arm's recessed portion is eliminated or minimized. This separation allows the hooking arm to focus on its primary function of holding arrows without suffering damage from repeated bowstring engagement, thereby improving durability while maintaining bowstring pulling flexibility through the retainer's dedicated limiting mechanism.
2Adaptability or versatility
If the recessed portion of the hooking arm is used to limit the bowstring pull, then the bowstring can be flexibly pulled, but the recessed portion suffers damage and reduces service life
Solution Approach 1:
The patent introduces a retainer as an intermediary component between the bowstring and the arrow magazine structure. The retainer's limiting portion serves as a dedicated mediator that absorbs the stress of bowstring engagement and prevents direct damage to the hooking arm's recessed portion. This intermediary mechanism allows the hooking arm to maintain its design flexibility and adaptability while the retainer protects the overall system by preventing over-pulling, thereby extending the service life of the arrow magazine.
3Difficulty of detecting and measuring
If the hooking section extends into the sliding rail to detect empty magazine, then the no-arrow detection is achieved, but the structure becomes complex and the top of arrow magazine becomes unfit
Solution Approach 1:
The patent extracts the no-arrow detection function from the hooking section and implements it through the retainer's limiting portion. When the arrow magazine is empty, the limiting portion of the retainer engages with the bowstring, preventing further pulling and providing a clear mechanical indication that the magazine is empty. This separate detection mechanism simplifies the overall structure by eliminating the need for the hooking section to extend into the sliding rail, thereby reducing structural complexity while maintaining effective no-arrow detection capability.
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
The solution ensures the presser is not damaged by the bowstring's pull, extends the magazine's lifespan, and provides flexible design choices by preventing string-pulling, thus ensuring smooth operation and durability.
Implementation Method 1
The resilient element elastically forces the contact portion of the presser to abut against a topmost arrow of the fixing channel
Implementation Method 2
the biasing portion is configured to press the contact portion of the presser downward so as to lift the shoulder of the retainer upward
Data Source
AI summary
An arrow magazine structure capable of detecting no-arrow and preventing string-pulling is configured to accommodate a body. The body includes a holder, a bowstring spanning the holder. The arrow magazine structure contains an arrow magazine, a flexible abutting unit, and a retainer. The arrow magazine includes a fixing channel which has multiple arrows. The flexible abutting unit includes a presser and a resilient element. The retainer is accommodated on the holder and includes a first end and a second end. The retainer includes a biasing portion and a shoulder. A rotatable connection portion of the retainer and the holder is located between the shoulder and the biasing portion, the biasing portion is configured to press the contact portion downward so as to lift the shoulder upward, and the shoulder stops the bowstring being pulled, thus reminding a running out of the arrow of the arrow magazine.