Helmet Shield Sun Visor Independent Rotation Mechanism
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Solution Overview
Problem
Conventional helmet shields with integrated sun visors have complex mechanisms, making attachment and detachment cumbersome, and are prone to wind-induced rotation issues during travel.
Innovation Solution
A helmet shield design featuring a sun visor that rotates independently of the shield using a simpler mechanism, with a rotating guide part that allows the sun visor to move between two positions, ensuring easy operation and secure retention, utilizing a spindle and retaining parts for guided movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sun visor is coaxially supported and rotatably connected with the shield as an integral member, then the sun visor can rotate within a defined range to provide anti-glare protection and high visibility, but the mechanism becomes complicated with a large number of components
Solution Approach 1:
The patent divides the integrated shield and sun visor system into separate components: the shield is supported on the helmet, and the sun visor is independently supported on the shield. This segmentation allows each component to have its own simple rotation mechanism rather than requiring a complex integrated mechanism, thereby reducing overall device complexity while maintaining the adaptability functions.
Solution Approach 2:
The sun visor is extracted from the shield structure and supported as a separate element. The rotating guide part is provided on the shield to guide the sun visor's rotation independently. This extraction eliminates the need for a complex coaxial rotation mechanism while preserving the anti-glare and visibility functions through independent sun visor rotation.
2Device complexity
If the shield and sun visor are attached and detached as an integrated unit, then the structure is simplified, but the attaching and detaching operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent segments the attachment system so that the shield can be attached and detached from the helmet independently, and the sun visor can be attached and detached from the shield independently. This segmentation allows for quicker, simpler operations compared to handling a large integrated unit, while the overall structure remains relatively simple.
Solution Approach 2:
The patent introduces dynamic, movable connections: the shield rotates on the helmet, and the sun visor rotates on the shield via a rotating guide part. These dynamic connections replace rigid fixed attachments, enabling easy attachment and detachment operations while maintaining structural simplicity through minimal moving components.
3Adaptability or versatility
If the sun visor is located in a rotating upper end position, then the sun visor can provide high visibility during night travel, but wind pressure may bring the sun visor down during traveling
Solution Approach 1:
The rotating guide part provides a mechanical feedback mechanism through its guide structure that maintains the sun visor in the upper end position. The guide part's geometry and constraint design create a self-stabilizing system where the sun visor naturally returns to or remains in the desired position, providing feedback against wind pressure disturbances and ensuring reliable position maintenance.
Solution Approach 2:
The rotating guide part is designed with preliminary anti-action features that counteract wind pressure before it can significantly displace the sun visor. The guide structure pre-establishes constraints and support forces that resist the anticipated downward force from wind pressure, preventing the sun visor from being brought down during traveling.
Data Source
AI summary
A shield for a helmet includes a shield having a sun visor rotatably and axially supported at a position different from a rotation center of the shield. The sun visor rotates within a range from a first position where the sun visor, like a bill of a hat, lies above a front opening part and projects forward to a second position where the sun visor lies outside facing the shield in an overlapping manner, and the sun visor is retained in the first position. The sun visor is operated and moved forward and away from the shield to rotate from the first position to the second position.