Universal Ventilation Duct for Multi-Size Helmets
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Solution Overview
Problem
The existing helmet ventilation systems require multiple sizes of ventilation ducts to maintain optimal ventilation efficiency, leading to increased manufacturing costs and complexity due to the varying distances between ventilating holes on different helmet sizes.
Innovation Solution
A helmet design featuring a ventilation duct composed of a central duct part and left/right duct parts, held in place by engaging support members that adjust to fit various helmet sizes, allowing for unified components that maintain optimal ventilation efficiency without reducing ventilation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sizes of ventilation ducts are prepared for different helmet sizes, then ventilation efficiency is maintained, but manufacturing costs and device complexity increase
Solution Approach 1:
The ventilation duct is designed as a universal component that can be used across multiple helmet sizes. The duct includes adjustable positioning mechanisms (such as movable support parts or adjustable angles) that allow the same duct structure to adapt to different helmet geometries, eliminating the need for size-specific duct variants while maintaining optimal ventilation performance.
Solution Approach 2:
The ventilation duct incorporates dynamic or adjustable elements that allow it to adapt its position or configuration based on the helmet size. This could include movable joints, adjustable support structures, or flexible positioning mechanisms that enable the duct to be optimally positioned on helmets of different sizes using a single duct design.
2Reliability
If multiple sizes of ventilation ducts are prepared for different helmet sizes, then ventilation efficiency is maintained, but manufacturing costs increase
Solution Approach 1:
The ventilation duct is designed as a universal component that can be used across multiple helmet sizes. The duct includes adjustable positioning mechanisms (such as movable support parts or adjustable angles) that allow the same duct structure to adapt to different helmet geometries, eliminating the need for size-specific duct variants while maintaining optimal ventilation performance.
3Ease of manufacture
If a single ventilation duct design is used for all helmet sizes, then manufacturing costs are reduced, but ventilation efficiency may be compromised
Solution Approach 1:
The ventilation duct incorporates dynamic or adjustable elements that allow it to adapt its position or configuration based on the helmet size. This could include movable joints, adjustable support structures, or flexible positioning mechanisms that enable the duct to be optimally positioned on helmets of different sizes using a single duct design.
4Manufacturing precision
If engaging support members are used to hold duct parts, then accurate installation is achieved, but device complexity increases
Solution Approach 1:
The engaging support members are segmented into modular components that can be independently positioned and assembled. This segmentation allows for precise positioning of each module to achieve accurate duct installation, while the modular nature simplifies manufacturing and assembly compared to a monolithic complex structure.
Data Source
AI summary
A ventilation duct comprises a left duct part and a right duct part which are arranged respectively on the left and right of a shell, and a central duct part which is arranged between the left and right duct parts. The left and right duct parts are held by limiting the movement thereof in the front/rear direction and the left/right direction of the shell, and in a direction away from the shell, by engaging support members, which are set at the arrangement positions of the left and right duct parts on an outer surface of the shell, and by the central duct part.