Watercraft Fin Assembly Impact Protection
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Solution Overview
Problem
Conventional fin assemblies for watercraft are prone to damage when subjected to impacts or forces, as the bonding strength between the fin box and the board body is weaker than the fin box and the fin, leading to potential damage or breakage of the board body.
Innovation Solution
A fin assembly comprising a mounting base with a cavity for the socket base, which is indirectly mounted in the board body, distributing and cushioning impacts, with reinforcing ribs and a fastening system to secure the fin, ensuring the bonding strength between the mounting base and the board body is greater than between the mounting base and the socket base, allowing the fin and socket base to detach instead of damaging the board body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fin box is directly secured to the board body with adhesive or fasteners, then the fin assembly structure is simple, but the bonding strength between the fin box and board body is weaker than between the fin box and fin, causing the fin box to easily split off or rip from the board body when subjected to impacts
Solution Approach 1:
The invention divides the fin assembly into multiple components: a fin box, a separate mounting base with cavity, and the board body. The mounting base is permanently secured to the board body while the fin box is removably mounted to it. This segmentation allows the mounting base to absorb impact forces, preventing direct transmission to the fin box and board body, thereby resolving the contradiction between structural simplicity and bonding strength.
Solution Approach 2:
The mounting base acts as an intermediary component between the fin box and the board body. It provides a buffer zone that absorbs and distributes impact forces, preventing the fin box from directly ripping the board body. The mounting base's cavity receives the fin box, creating a mechanical interface that enhances overall assembly strength while maintaining ease of assembly and disassembly.
2Strength
If the fin box penetrates the board body with threaded screws, then the fin is securely held in the fin box, but the structure still does not prevent damage to the board body when serious impacts are exerted on the fin
Solution Approach 1:
The mounting base with its cavity structure provides beforehand cushioning for the fin box assembly. When impacts occur on the fin, the mounting base's cavity and structural design absorb and distribute the shock forces before they can damage the board body. This prior cushioning mechanism protects the board body from harmful impact forces while maintaining secure fin holding capability.
3Strength
If the bonding strength between mounting base and board body is made greater than between mounting base and socket base, then the board body is protected from damage, but the fin and socket base can easily detach from the mounting base
Solution Approach 1:
The invention creates a dynamic attachment system where the fin box can be easily removed from and reattached to the mounting base. The mounting base's cavity and the fin box's spigot form a reversible mechanical connection that maintains stability during normal use but allows easy detachment when needed. This dynamic design resolves the contradiction by providing both strong board body protection and flexible component replacement capability.
Data Source
AI summary
A fin assembly includes a fin, a mounting base and a socket base. The mounting base is provided for permanent inclusion within a watercraft. The mounting base defines a cavity that is adapted for receiving the socket base. The socket base further includes a cavity adapted for receiving the fin. The socket base is further adapted for receiving an accessory.