Helmet Ventilation Ridge Grooves for Chin Airflow
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Solution Overview
Problem
Conventional full-face-type helmets for off-road driving, such as motocross helmets, face ventilation issues due to air resistance in the ventilation system, leading to poor airflow and increased unpleasantness for the rider, especially during low-speed riding and intense exercise, and the need for a ventilation through hole in the side head region compromises impact absorption performance.
Innovation Solution
A full-face-type helmet design featuring a ventilation system with a first opening in the chin region, an impact absorbing liner with a sheet-like backing plate and ventilation ridge grooves that allow air to flow directly into the liner without bending at a right angle, eliminating the need for a ventilation through hole in the side head region, and incorporating a blockish inside pad for the cheek to enhance airflow and impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ventilation through hole extending through the impact-on-the-head absorbing liner in the direction of thickness is formed near the side head region, then external air can be introduced into the interior of the impact-on-the-head absorbing liner, but the performance of moderating the impact degrades near the side head region
Solution Approach 1:
The invention changes the ventilation approach from introducing air through the thickness direction (which compromises impact absorption) to introducing air through the surface area of the liner. The ventilation ridge grooves are formed on the outer surface of the impact-on-the-chin absorbing liner, allowing air to flow along the surface without creating through-holes that would weaken the impact absorption structure.
Solution Approach 2:
The invention segments the ventilation function from the impact absorption function by creating separate structural elements. The ventilation ridge grooves are formed as distinct features on the liner surface, while the backing plate and liner structure maintain their integrity for impact absorption. This segmentation allows both ventilation and impact protection to function independently without compromising either.
2Ease of operation
If the air passage is formed to introduce external air into the head cover through small openings formed in the chin cover, then ventilation is provided, but the resistance against the external air flow is large causing poor airflow
Solution Approach 1:
The invention changes the parameters of the ventilation system by increasing the opening area from small openings in the chin cover to a large ventilation opening. It also changes the flow path parameters by eliminating right-angle bends and long distances, creating a more direct and efficient airflow path that reduces resistance and improves airflow efficiency.
3Device complexity
If ventilation ridge grooves are formed in the outer surfaces of the impact-on-the-chin absorbing liner and impact-on-the-head absorbing liner to form air passage, then air passage is created, but external air must bend substantially at a right angle at the through hole causing large resistance
Solution Approach 1:
The invention extracts the ventilation function from the complex multi-component air passage system and concentrates it in the impact-on-chin absorbing liner. By forming ventilation ridge grooves only in the impact-on-chin absorbing liner and providing a large ventilation opening, the system eliminates the need for through-holes in the impact-on-the-head absorbing liner and the associated right-angle bends, thereby improving airflow smoothness.
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
The design ensures effective ventilation by allowing external air to flow into the helmet without significant resistance, maintaining impact absorption performance across the helmet, and providing improved comfort and airflow without the limitations of a ventilation through hole in the side head region.
Implementation Method 1
ventilation ridge groove which is formed in the inner surface of the liner main body portion and communicates with the second ventilation opening
Implementation Method 2
an impact absorbing liner disposed inside the outer shell
Data Source
AI summary
A full-face-type helmet such as an off-road driving helmet, in which ventilation of the interior of the full-face-type helmet is performed well by external air flowing in from a chin region, and a ventilation through hole extending through an impact absorbing liner substantially in the direction of its thickness need not be particularly formed in a region including the side head region and its vicinity of the impact absorbing liner for the external air flowing in from the chin region. The impact-on-the-chin absorbing portion of the impact absorbing liner disposed inside an outer shell having a first ventilation opening in the chin region includes a liner main body portion, and a sheet-like backing plate which is arranged on the inner surface of the liner main body portion. The liner main body portion includes a second ventilation opening substantially opposing the first ventilation opening, and a ventilation ridge groove which is formed in the inner surface of the liner main body portion and communicates with the second ventilation opening.