Shade Roller Elastic Pad Reduces Wear and Clearances
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Solution Overview
Problem
In vehicle roof windows, shade roller apparatuses allow light to enter through clearances between the shading sheet and interior members, reducing shading effectiveness, and constant friction causes wear at the hem portions of the shading sheet.
Innovation Solution
Incorporating elastic pads between the pull bar's bottom wall and the shading sheet to lower the sheet's position, reducing friction and wear by distributing force more evenly, and extending these pads along the pull bar's length for broader coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the height of the shading sheet is lowered to eliminate clearance and enhance shading properties, then shading effectiveness is improved, but the hem portions of the shading sheet are constantly frictioned against the head lining leading to wear
Solution Approach 1:
The patent introduces an elastic pad as an intermediary component between the pull bar and the shading sheet. This elastic pad serves as a mediator that transmits the lowering force to the shading sheet while absorbing friction wear, thereby eliminating clearance to improve shading effectiveness without causing direct wear to the shading sheet hem portions.
2Object-affected harmful factors
If elastic pad is provided between the bottom wall and the shading sheet to lower the sheet position, then clearance is closed and shading properties are enhanced, but the structure becomes more complex
Solution Approach 1:
The patent merges the elastic pad with the pull bar assembly by positioning it between the bottom wall and the shading sheet. This integration allows the elastic pad to function as part of the existing pull bar structure, lowering the shading sheet position to eliminate clearance while minimizing additional structural complexity.
3Reliability
If the elastic pad is made of material exhibiting more elasticity than the pull bar, then the shading sheet position can be effectively lowered and friction force is reduced, but the material selection becomes more constrained
Solution Approach 1:
The patent specifies that the elastic pad be made of material exhibiting more elasticity than the pull bar, changing the material parameter to achieve effective lowering of the shading sheet position. This parameter change ensures that the elastic pad can deform under friction force, reducing wear on the shading sheet while maintaining the structural integrity of the pull bar assembly.
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
Enhances shading properties by closing clearances and reduces wear on the shading sheet by minimizing friction, while also preventing wrinkling and potential passenger contact issues.
Implementation Method 1
The elastic pad (55) is made of a material exhibiting more elasticity than the pull bar (70)
Implementation Method 2
even when the shading sheet (51) is frictioned against another member such as the head lining, force receiving the shading sheet (51) at this point is small
Data Source
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AI summary
[Problem to be solved] In a shade roller apparatus, to enhance light-shielding capability of a shading sheet (51) and reduce wear of the shading sheet (51) caused due to rubbing against other components [Solution] A pull bar (70) includes a sheet retainer (71) retaining the shading sheet (51), and a bottom wall (75) located below the sheet retainer (71). An elastic pad (55) is provided between the bottom wall (75) and the shading sheet (51). The elastic pad (55) includes end portions arranged at at least both ends of the pull bar (70).