Door curtain assembly having variable screening rate structure
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Solution Overview
Problem
Conventional door curtains in vehicles lack the ability to adjust their screening rate, making it impossible to control the amount of sunlight entering the passenger compartment or ensure occupant privacy by altering the light shielding intensity.
Innovation Solution
A door curtain assembly with a variable screening rate structure, featuring internal and external curtains with patterns of different light transmittances, a control knob to adjust their overlap, and a curtain hook for locking, allowing the occupant to change the screening rate by adjusting the angle of the control knob.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single door curtain with fixed pattern is used, then the structure is simple, but the screening rate cannot be adjusted
Solution Approach 1:
The door curtain is divided into two separate curtains (first curtain and second curtain) that can be independently controlled. Each curtain has its own winding reel and control mechanism, allowing the screening rate to be adjusted by controlling the extension of each curtain separately while maintaining a relatively simple overall structure
Solution Approach 2:
The curtain system transitions from a fixed static configuration to a dynamic adjustable system. The screening rate can be changed by rotating the control knob to extend or retract the curtains to different positions, enabling the pattern overlap ratio to be dynamically adjusted according to lighting conditions and privacy requirements
2Adaptability or versatility
If double curtains with patterns are added to enable screening rate adjustment, then adaptability improves, but device complexity increases
Solution Approach 1:
The control knob serves multiple functions: it controls the extension and retraction of both the first and second curtains, and it adjusts the relative positioning between the two curtains to achieve different pattern overlap ratios. This multi-functionality reduces the need for separate control mechanisms for each curtain, thereby limiting the increase in device complexity
Solution Approach 2:
The first curtain and second curtain are arranged in a nested configuration where they can overlap with each other. The patterns on the curtains are designed to nest together at different overlap ratios, allowing the screening rate to be adjusted by changing the degree of nesting/overlap while using the same curtain materials and patterns
Data Source
AI summary
A door curtain assembly having a variable screening rate structure may include an internal curtain provided to be wound in a door trim and having patterns; an external curtain provided to be wound in the door trim and having a plurality of patterns; a control knob to which an upper edge portion of the internal curtain and an upper edge portion of the external curtain are fixed, and which is configured to adjust the positions of the internal and external curtains so that a rate at which the patterns of the internal curtain and the patterns of the external curtain overlap with each other may be changed, whereby the screening rate may be adjusted; and a curtain hook disposed on an upper end portion of a door frame so that the control knob may be locked to the curtain hook.