Bowfishing Arrow Nock With Magnetic Slider Retention
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Solution Overview
Problem
Existing archery arrows, particularly those used for bowfishing, face challenges with the arrow separating from the bowstring due to the tapered rear shape, which is exacerbated by wet and slippery conditions, leading to difficulties in maintaining a secure attachment during shooting and retrieval.
Innovation Solution
The arrow design incorporates a magnetically attractive slider that moves along the shaft, featuring a magnet and a magnetically attractive material, with a nock and finger recesses designed to apply a rearward force, and a slider mechanism that stabilizes the arrow during launch and prevents it from separating from the bowstring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a tapered rear shape is used on the arrow or nock to reduce drag, then aerodynamic performance is improved, but the arrow is more prone to separating from the bowstring under inward pressure
Solution Approach 1:
A magnetic slider is introduced as an intermediary component between the arrow shaft and bowstring. The slider includes a magnet that engages with a magnetically attractive material on the arrow shaft, creating a magnetic connection that prevents the arrow from separating from the bowstring while allowing the tapered rear shape to maintain its aerodynamic benefits
Solution Approach 2:
The traditional mechanical friction-based retention system is replaced with a magnetic retention system. The magnet in the slider works with the magnetically attractive material on the shaft to provide a reliable connection that is not dependent on friction or mechanical interlocking, thereby preventing separation under pressure while maintaining the tapered aerodynamic shape
2Ease of operation
If the slider is positioned forward to allow line attachment ahead of the arrow support, then the line does not need to pass through the arrow support, but the arrow may separate from the bowstring during launch
Solution Approach 1:
The slider is designed to be movable along the arrow shaft rather than fixed at a specific position. During launch, the slider can move to a rearward position where the magnetic force is strongest to prevent separation, and during retrieval, it can move forward to allow the line to pass through the arrow support without interference
Solution Approach 2:
The magnetic slider is pre-positioned on the arrow shaft during assembly, creating a magnetic connection before the arrow is shot. This preliminary magnetic engagement ensures that the arrow remains securely attached to the bowstring during launch, and the slider can then move to its operational position for line attachment
3Reliability
If the slider moves rearward during launch to prevent separation, then the line attachment point remains forward of the arrow support, but the line may be contacted by a struggling fish during retrieval
Solution Approach 1:
The slider's position along the arrow shaft is made dynamic and adaptable. During launch and immediate aftermath, the slider remains in a rearward position to maintain strong magnetic engagement with the bowstring. During retrieval, when the arrow is pulled back along the shaft, the slider moves forward to a position where the line attachment point is ahead of the arrow support, allowing the line to clear the fish during retrieval without contact
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 design enhances the archery and bowfishing experience by maintaining a secure arrow-bowstring engagement, ensuring stable flight and effective retrieval, even in wet conditions, through the use of magnetic attraction and slider stabilization.
Implementation Method 1
a magnetically attractive material attached to the shaft. A slider is engaged with the shaft and moveable along a length of the shaft. The slider comprises a magnet.
Data Source
AI summary
In some embodiments, an arrow comprises a shaft and a notch in an end of the arrow. The notch is arranged to receive a bowstring. A first finger recess and a second finger recess are located in proximity to the notch. The first finger recess and the second finger recess comprise opposed diverging surfaces.