Spear Fishing Hand Strap for One-Handed Loading and Aiming
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Solution Overview
Problem
Existing spear fishing devices, particularly sling-style devices, lack a locking element to secure the spear in a ready-to-fire position, making them difficult to maneuver and control underwater, especially in strong water flow, and often result in insufficient shooting range and low accuracy.
Innovation Solution
A spear fishing device with a hand strap attached to the muzzle, allowing one-handed operation and ergonomic securing of the spear in a loaded position, utilizing an elastic member to store potential energy and a receiving portion to transmit force to the spear, without a locking or trigger mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking element is added to secure the spear in a ready-to-fire position, then control and maneuverability improve, but device complexity increases
Solution Approach 1:
The user's hand serves as the locking mechanism by gripping the shaft handle, eliminating the need for a separate locking element. The grip force naturally secures the spear in the ready-to-fire position while allowing easy release when needed.
Solution Approach 2:
The locking function is extracted from a separate mechanical component and integrated into the user's natural gripping action, simplifying the device while maintaining control.
2Ease of operation
If the elastic member is positioned away from the shaft, then the device is easier to carry and maneuver, but shooting range and accuracy decrease
Solution Approach 1:
The elastic member is wrapped around the shaft in a circumferential arrangement rather than extending linearly away from it. This dimensional change allows the elastic potential energy storage to be compact while still providing sufficient thrust force for accurate shooting.
3Ease of operation
If a trigger mechanism is added to release the spear, then firing control improves, but opportunities for broken parts and mechanical complications increase
Solution Approach 1:
The user's finger naturally serves as the trigger mechanism by simply releasing its grip on the shaft handle. This eliminates complex trigger mechanisms while maintaining intuitive firing control.
Solution Approach 2:
The trigger function is extracted from a mechanical component and replaced with a simple release of grip force, eliminating broken parts while preserving firing control.
4Force
If the elastic member length is increased to provide more thrust force, then shooting range improves, but operation becomes more difficult
Solution Approach 1:
The elastic member is arranged in a wrapped configuration around the shaft, effectively increasing the functional length and thrust force while maintaining a compact operational form factor that remains easy to handle.
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 versatile and accurate underwater maneuvering with improved shooting range and control, allowing users to aim and fire the spear with ease using a single hand, even in challenging water conditions.
Implementation Method 1
an elastic member for storing and releasing potential energy
Data Source
AI summary
Spear fishing devices with handstraps are provided. In some embodiments, articles are provided that comprise handstraps extending up to a front end of a shaft handle, allowing users to pinch the shaft. Further, in some embodiments, a handstrap extending over a front end of a shaft is provided, offering users firm control and comfortable grabbing of a shaft. Further, in some embodiments, a spear fishing device comprises a detachable shooter, which will remain on users'hands after launching a projectile toward targets. The detachable shooter feature increases the projectile's traveling distance and aiming accuracy.