Ergonomic Canoe Paddle with V-Shaped Shaft
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Solution Overview
Problem
Traditional kayak and canoe paddles often require operators to flex and extend their wrists and raise their elbows above shoulder level, leading to strain on joints and ligaments, particularly for individuals with injuries like carpal tunnel syndrome or rotator cuff issues, and they compromise maneuverability and efficiency.
Innovation Solution
A manually operated watercraft paddle with a central shaft featuring a series of bends or joints forming a 'V' or 'U' shape, positioned below the operator's line of sight, and a contoured grip structure with a thumb support and adjustable forearm support to reduce strain and maintain unobstructed forward view, allowing for a neutral hand position and reduced twisting force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a straight shaft is used in traditional kayak paddles, then the structure is simple and easy to manufacture, but it requires the operator to raise elbows above shoulder level causing joint strain
Solution Approach 1:
The shaft is divided into multiple segments with bends at specific locations, allowing the paddle to achieve ergonomic angles without requiring a completely new design. The segmented structure enables the shaft to route below shoulder level while maintaining operational effectiveness.
Solution Approach 2:
The shaft configuration moves from a simple linear arrangement to a multi-dimensional bent structure, routing the shaft below the operator's shoulder level and creating an ergonomic pathway that reduces joint strain while maintaining paddling efficiency.
2Ease of operation
If the shaft is bent into inverted 'V' shape, then elbow strain is reduced, but maneuverability of the watercraft decreases
Solution Approach 1:
Bends are strategically placed at specific locations along the shaft rather than uniformly distributed, allowing the paddle to maintain effectiveness in critical areas while providing ergonomic relief where needed. The bends are positioned to optimize both operator comfort and paddling performance.
Solution Approach 2:
The shaft configuration uses specific bend angles and positions that optimize the balance between ergonomics and maneuverability. By carefully controlling the geometric parameters of the bends, the paddle maintains forward thrust efficiency while reducing the required elbow elevation.
3Force
If the shaft is positioned higher for better leverage, then forward thrust force increases, but the operator's forward view is obstructed
Solution Approach 1:
The shaft is routed below the operator's line of sight in the vertical dimension, creating clearance for an unobstructed forward view. The bent configuration achieves this by moving the shaft pathway downward while maintaining the necessary leverage through strategic bend positioning.
4Ease of operation
If traditional grip structures are used, then manufacturing is simple, but wrist strain increases due to required flexion and extension
Solution Approach 1:
The grip structure incorporates ergonomic features such as thumb rests and contoured surfaces at specific locations to support neutral wrist positioning. These localized ergonomic enhancements are integrated into the overall grip design to reduce wrist strain while maintaining manufacturability.
Data Source
AI summary
A watercraft paddle has a composite structure of shaft components joined by adjustable joints enabling the shape of the composite structure and orientation of individual shaft components relative to other shaft components to be altered, a first paddle blade joined at a first outboard end of the composite structure, a second paddle blade joined at a second outboard end of the composite structure, opposite the first outboard end, and a first and a second grip region on the composite structure equally spaced to each side from center for a user to grip the composite structure to paddle the watercraft.