Blind Apparatus Under-Structure for Adjustable Screen Length
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Solution Overview
Problem
Conventional blind apparatuses require fully unrolling and re-rolling screens to adjust light levels, which is inefficient and can cause wrinkles or waves, especially when the window length is shorter than the screen length.
Innovation Solution
An under-structure for blind apparatuses featuring a first bar, plug, second bar, cover, and wrench plug system that allows for adjustable screen length by rotating the first bar relative to the second bar, enabling the screen to be adjusted to fit any window length without full unrolling, and includes a handle for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the screen is fully unrolled to adjust light levels, then the light adjustment function is achieved, but the screen develops wrinkles and waves
Solution Approach 1:
The first bar is designed to be rotatable relative to the second bar, allowing the screen length to be dynamically adjusted by rotating the first bar to different angular positions. This dynamic adjustment mechanism enables the screen to be shortened without full unrolling, preventing wrinkles while maintaining light adjustment capability
Solution Approach 2:
The effective length of the screen is changed by altering the angular position of the first bar relative to the second bar. By changing this geometric parameter, the screen length can be adjusted to match different window dimensions without requiring complete unrolling, thus avoiding screen deformation
2Area of stationary object
If the screen length is fixed longer than the window, then the screen can cover the window, but the screen must be fully unrolled and re-rolled to adjust, reducing efficiency
Solution Approach 1:
The rotatable first bar enables dynamic length adjustment of the screen. Instead of fixed length requiring full unrolling, the user can quickly rotate the first bar to the appropriate angular position to achieve the desired screen length, dramatically improving adjustment efficiency
Solution Approach 2:
The mechanism allows the screen to be pre-adjusted to the correct length for different window sizes by rotating the first bar before use. This preliminary adjustment eliminates the need for repeated full unrolling and re-rolling operations
3Device complexity
If the screen length is fixed, then the structure is simple, but it cannot adapt to different window lengths
Solution Approach 1:
The rotatable connection between the first and second bars provides a simple yet effective adjustment mechanism. This dynamic structure allows the screen length to be changed by rotation rather than requiring complex telescopic or segmented designs, maintaining structural simplicity while achieving adaptability
Solution Approach 2:
The rotatable first bar mechanism serves multiple functions: it adjusts screen length, adapts to different window sizes, and maintains structural simplicity. This multi-functional design eliminates the need for multiple fixed-length screens or complex adjustment mechanisms
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
Enables easy adjustment of screen length to match window dimensions, preventing wrinkles and improving the appearance and functionality of the blind apparatus by allowing for precise length adjustment without full unrolling, thus enhancing usability and reducing functional deterioration.
Implementation Method 1
The wrench bar may apply elasticity to the inner side of the first through-hole by being longitudinally divided into several parts.
Data Source
AI summary
The present invention provides an under-structure of a blind apparatus.An under-structure of a blind apparatus according to an embodiment of the present invention includes: a first bar that holds the lower end of a screen; a plug that is coupled to an end of the first bar and has a first through-hole at the center; a second bar that receives the first bar and has a slit through which the screen comes out; a cover that is fixed to an end of the second bar and has a second through-hole communicating with the first through-hole; and a wrench plug that is coupled to the outside of the cover and is fitted in the first through-hole through the second through-hole to transmit torque.