Vehicle Sun Visor Protruding Impact Absorption
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Solution Overview
Problem
Conventional vehicle sun visors fail to effectively alleviate impact force on vehicle occupants' heads during diagonal frontal collisions, as the central area of the sun visor main body lacks rigidity, making it difficult to absorb the impact when occupants move inertially in a diagonally forward direction.
Innovation Solution
A vehicle sun visor with a protruding portion on its bottom surface when in storage position, which extends towards the vehicle's bottom side, and a V-shaped design that absorbs impact by deforming elastically, combined with a pivotable vanity mirror and energy absorption components, to redirect and absorb the impact force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the central area of the sun visor main body is formed having less rigidity than surrounding areas, then impact force is alleviated in frontal collisions, but impact force cannot be effectively alleviated in diagonal frontal collisions when occupants strike the long-side edge portion
Solution Approach 1:
The patent adds a protruding portion that extends in the vehicle width direction (transverse dimension) from the long-side edge portion of the sun visor main body. This dimensional addition creates a new protective element positioned to intercept occupants in diagonal collisions, transforming the protection mechanism from solely relying on central area deformation to including edge portion interception through the protruding structure.
Solution Approach 2:
The sun visor main body is segmented into distinct functional areas: a central area with reduced rigidity for absorbing frontal impact forces, and a long-side edge portion with a protruding portion for intercepting diagonal collision impacts. This segmentation allows each region to specialize in protecting against specific collision types, improving overall protection reliability.
2Strength
If the sun visor main body is made with uniform rigidity, then structural strength is maintained, but impact force absorption capability is reduced
Solution Approach 1:
The sun visor main body employs local quality variation where the central area has reduced rigidity compared to the surrounding areas. This allows the central region to deform and absorb impact forces during frontal collisions, while the surrounding higher rigidity areas maintain overall structural strength and support the sun visor's mechanical functions.
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 sun visor effectively alleviates impact force on vehicle occupants' heads during both diagonal and frontal collisions by redirecting the impact and absorbing it with the protruding portion and energy absorption components, enhancing safety and reducing the risk of head injury.
Implementation Method 1
the sun visor main body is elastically deformed towards the vehicle body top side, so that the impact force is effectively absorbed
Data Source
AI summary
A vehicle sun visor including: a sun visor main body that is formed in a substantially rectangular plate shape that extends in a vehicle transverse direction, the sun visor main body having one long-side edge portion that is pivotably supported at a front portion of a ceiling inside a vehicle cabin, and the sun visor main body being set in a storage position along the ceiling as a result of another long-side edge portion being pivoted towards a vehicle body rear side; and a protruding portion that is formed on a bottom surface of the sun visor main body in a case in which the sun visor main body has been set in the storage position, and that protrudes towards a vehicle bottom side when seen in a side view from the vehicle transverse direction.