Shade Device Guide Member Folding Mechanism
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Solution Overview
Problem
Existing shade devices face challenges in ensuring sufficient distance for the change between folded and unfolded states of the light-shielding sheet, which affects the separation distance between the rod and the winding shaft, impacting the amount of light that can pass through the light-transmitting portion.
Innovation Solution
The shade device is configured with guide rails, a winding shaft, a light-shielding sheet, a rod, sliding members, and guide members, where the light-shielding sheet is wound around the winding shaft with folded edges unfolding, and the fixing position of the side edge at the guide member is more separated from the winding shaft than from the rod, allowing the range of folding and unfolding to overlap with the rod's range, ensuring adequate distance for change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the separation distance between the rod and the winding shaft is shortened to allow more light to pass through, then the amount of light transmission is improved, but the distance required for the side edges of the light-shielding sheet to change between folded and unfolded states cannot be sufficiently ensured
Solution Approach 1:
The patent introduces guide members that extend in the width direction (second direction) perpendicular to the front-rear direction (first direction). By fixing the side edges of the light-shielding sheet to these guide members rather than positioning them solely along the rod's movement path, the system utilizes a second dimension to provide the necessary space for folding and unfolding operations. This allows the rod to be positioned closer to the winding shaft in the first direction while the side edges have sufficient travel distance in the second direction to complete their folding/unfolding cycle.
2Illumination intensity
If the rod is positioned closer to the winding shaft to maximize light transmission, then light transmission is improved, but the light-shielding sheet cannot maintain proper folding and unfolding functionality
Solution Approach 1:
The guide members act as intermediary elements between the rod and the side edges of the light-shielding sheet. These guide members are fixed to the rod and provide attachment points for the side edges, enabling the sheet to fold and unfold properly even when the rod is positioned close to the winding shaft. The guide members mediate the relationship between the rod's limited travel distance and the sheet's required folding/unfolding motion, ensuring reliable operation.
3Volume of moving object
If the side edges of the light-shielding sheet are fixed closer to the rod to reduce overall device size, then device compactness is improved, but the distance required for folding and unfolding changes cannot be ensured
Solution Approach 1:
By fixing the side edges to guide members that extend in the width direction (second direction), the patent effectively moves the folding/unfolding action into a different dimension. This allows the overall device to remain compact in the front-rear direction (first direction) while providing sufficient distance for side edge manipulation in the width direction (second direction). The guide members enable the side edges to have adequate travel distance without increasing the device's footprint in the primary movement direction.
Data Source
AI summary
A shade device includes: guide rails extending in parallel to each other in a first direction as one direction; a winding shaft extending in a second direction as a direction orthogonal to the first direction on one end side of both of the guide rails in the first direction; a light-shielding sheet having one end portion coupled to the winding shaft; a rod extending in the second direction and coupled to the other end portion of the light-shielding sheet; sliding members attached to both of the end portions of the rod in a longitudinal direction and slidably supported by both of the guide rails; and guide members are attached to both of the end portions of the rod in the longitudinal direction, slidably supported by both of the guide rails, and fixed in a state where both of the side edges of the light-shielding sheet are folded.