Adjustable Barb Arrowhead for Bowfishing Release
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Solution Overview
Problem
Existing arrowheads for bowfishing require the arrow tip to be unscrewed to release caught prey, which can be difficult and leads to potential loss of the tip, especially in unstable conditions like small watercraft or when handling wriggling fish.
Innovation Solution
An arrowhead design featuring an elongate housing with a slidable and rotatable barb that can be adjusted between capture and release positions without removing the arrow tip, using a compression spring for biasing and a unique slot and aperture configuration to allow for one-handed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arrow tip is unscrewed to release the catch, then the prey can be removed from the arrow shaft, but the operation becomes difficult and the tip may be lost
Solution Approach 1:
The barb is designed to be dynamically adjustable between extended and retracted positions. When the barb is extended, it captures the prey securely. When retracted, it allows easy release of the prey without requiring unscrewing of the arrow tip. This dynamic adjustment mechanism resolves the contradiction by providing both secure capture and easy release while keeping the tip permanently attached.
Solution Approach 2:
The barb is segmented into a middle section that slides within the housing and leg sections that extend outward. The middle section can be independently moved between positions within the elongate slot, allowing the leg sections to be positioned for either capture or release. This segmentation enables the release function without requiring removal of the entire tip assembly.
2Reliability
If the barb is extended to capture prey, then the prey is securely held, but the release mechanism becomes complex requiring tip removal
Solution Approach 1:
The barb transitions from a static extended position for capture to a dynamic retracted position for release. The sliding mechanism within the elongate slot allows simple linear movement to switch between capture and release states, avoiding complex multi-step release procedures while maintaining secure capture when extended.
Solution Approach 2:
The elongate slot acts as an intermediary mechanism between the barb and the housing. It guides the barb's movement and provides a constrained path for retraction, simplifying the release mechanism while ensuring the barb remains securely positioned during capture.
3Reliability
If the tip is kept on the arrow shaft to prevent loss, then the tip is retained, but the release of prey becomes difficult requiring unscrewing
Solution Approach 1:
The barb is segmented from the housing, allowing independent movement of the barb within the constrained space of the housing. This segmentation enables the barb to be retracted and rotated to release prey while the tip remains permanently attached to the arrow shaft, resolving the contradiction between tip retention and easy release.
Solution Approach 2:
The barb provides dynamic release capability through its sliding and rotating movements within the housing, eliminating the need to unscrew the tip. The system achieves easy prey release through internal barb movement while maintaining permanent tip attachment to the arrow shaft.
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
Enables easy and secure release of caught prey without losing the arrow tip, reducing manual dexterity requirements and minimizing the risk of tip loss, while maintaining the arrowhead's integrity during handling.
Implementation Method 1
a compression spring for biasing the barb in the extended position
Data Source
AI summary
An arrowhead for capturing and releasing prey during archery bowfishing or other archery activities includes an elongate housing for mounting to an arrow shaft; an elongate slot extending through the housing; an aperture extending transversely through the elongate slot, the aperture having a cross dimension that is larger than a width of the slot; and a barb having a middle section normally captured in the elongate slot in an extended position and at least one leg section extending from the middle section for movement therewith. The barb is slidable within the slot between a retracted capture/release position where the middle section of the barb is captured against rotation and a contracted position where the middle section of the barb is coincident with the aperture to allow rotation of the barb within the aperture about a central axis of the middle section to thereby adjust the at least one leg portion between capture and release positions of the barb for respectively capturing and releasing prey.