Vehicle Sunshade Lateral Slider Mechanism for Compact Winding
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Solution Overview
Problem
Conventional sunshade devices for vehicles have limitations in maximizing the opening area when the shade is wound up, as the design restricts the movement of the shade towards the center shaft, resulting in a smaller opening area.
Innovation Solution
The sunshade device incorporates two first sliding members and two second sliding members, with their sliders and shade support portions arranged in a direction crossing the advancing and retreating direction of the shade, and disposed on the lateral side of the rod, allowing for a more compact structure that enables the shade to be moved further towards the center shaft, thereby increasing the opening area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the slider and shade support portion are disposed on the lateral side of the rod, then the opening area is increased and the device thickness is reduced, but the structural complexity increases
Solution Approach 1:
The slider and shade support portion are arranged in a direction crossing the advancing and retreating direction of the shade, and disposed on the lateral side of the rod rather than extending forward or backward. This lateral positioning in a different dimension reduces the space occupied by protruding components, enabling the shade to be moved further toward the center shaft and thereby enlarging the opening area while reducing device thickness.
2Volume of moving object
If the slider and shade support portion are arranged in a direction crossing the advancing and retreating direction, then the space occupied by components is reduced, but the manufacturing complexity increases
Solution Approach 1:
The sliding member is divided into functionally independent portions: the slider that moves along the guide rail and the shade support portion that supports the shade corner. These segmented portions are arranged in different directions (slider in advancing/retreating direction, shade support portion in crossing direction), allowing each to perform its function independently while minimizing the overall space occupied by the assembly.
3Area of stationary object
If the shade is moved further towards the center shaft, then the opening area is increased, but the structural stability may be compromised
Solution Approach 1:
The slider and shade support portion are integrated into a single sliding member assembly that moves together along the guide rail. This merged structure ensures that as the shade is moved toward the center shaft to increase opening area, the slider and shade support portion maintain their relative positions and work cooperatively, preserving structural stability while achieving the desired opening enlargement.
Data Source
AI summary
A sunshade device includes: a roll shade having a shade; a rod provided in a front end portion of the shade; two guide rails each configured to guide the shade; two first sliding members each having a slider attached to a corresponding one of opposite ends of the rod and guided by a corresponding one of the guide rails; and two second sliding members each having a shade support portion configured to support a shade corner portion and guided by a corresponding one of the guide rails, wherein the slider and the shade support portion are arranged in a direction crossing an advancing and retreating direction of the shade, and at least a portion of the slider and at least a portion of the shade support portion are disposed on a lateral side of the rod in a lateral direction along the rod.