Helmet Shield and Perimetral Seal for Dust and Wind Pressure
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Solution Overview
Problem
Existing motorcycle helmets designed for on-road and off-road use fail to provide effective eye protection and comfort due to the use of shields that induce wind pressure on the face and allow dust intrusion, while goggles compromise comfort and vision at higher speeds.
Innovation Solution
A helmet with a transparent shield that engages with the helmet's perimetral lip, using a strap to distribute wind pressure away from the face and a sealing member to prevent dust ingress, combined with a removable shield configuration for varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shield member is used in street helmets to protect eyes from wind and debris, then eye protection is improved, but wind pressure is exerted against the user's face causing discomfort
Solution Approach 1:
The harmful wind pressure force is extracted and redirected away from the user's face. The shield member is designed to redirect wind flow around the face rather than allowing it to press directly against the face, separating the protective function from the harmful pressure effect.
Solution Approach 2:
The shield member acts as an intermediary between the wind and the user's face. It intercepts the wind and redirects it, serving as a mediator that protects the face from direct wind exposure while managing the wind pressure through its positioning and design.
2Temperature
If street helmets allow air flow into the interior for cooling, then thermal comfort is improved, but dust and debris can intrude into the helmet interior
Solution Approach 1:
Different regions of the helmet have different properties: the front shield area provides dust protection while the rear and side areas allow air flow for cooling. The shield member creates a localized protective zone around the face and eye area while maintaining open air flow paths in other regions of the helmet interior.
3Object-affected harmful factors
If goggles are used in off-road helmets to seal against dust, then dust protection is improved, but vision and comfort are compromised at higher speeds
Solution Approach 1:
The shield member is designed as a simple, replaceable component that can be easily cleaned or replaced if damaged. Rather than using complex sealed goggle systems, a simpler shield design is employed that can be quickly maintained and does not compromise vision.
4Object-affected harmful factors
If a perimetral seal is added to prevent dust ingress, then dust protection is improved, but the device complexity increases
Solution Approach 1:
A flexible perimetral seal member is used to create an effective dust barrier. The seal is positioned at the periphery of the shield where it can flex and conform to the helmet structure, creating a dust-tight seal without requiring complex rigid sealing mechanisms or structural modifications.
Data Source
AI summary
A protective helmet for use with motorsports and cycling activities has a head receiving helmet body that includes a head receiving interior, and an exterior having a front surface, a rear surface, and a perimetral lip for defining a forward-facing aperture. A transparent shield member is engageable with the helmet body and is configured to be placeable adjacent to the forward-facing aperture of the helmet body. The shield member includes a perimetral edge that is sized and configured for engaging the perimetral lip of the helmet body. A strap is coupled to the shield and is configured to engage the rear surface of the helmet body. The engagement of the perimetral edge of the shield member with the perimetral lip of the helmet body enables an increasing force exerted against the shield to be exerted against the helmet, rather than directly against the user's face, and resists the intrusion of dust into the interior of the helmet.