Top-down Bottom-up Window Covering Beam Lifting Mechanism
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Solution Overview
Problem
Conventional top-down bottom-up window coverings have limited space in the headrail, making installation and maintenance of reeling units difficult and inconvenient, with sets of reeling units often interfering with each other.
Innovation Solution
The design features a first and second lifting structure in the first and second beams, respectively, with pulling cords that are fixedly connected to the fixture and linked to movable members, allowing for smooth operation and effortless movement of the beams, reducing interference and facilitating assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two sets of reeling units are provided in the headrail for reeling in the cords, then the top-down bottom-up window covering can control both the first beam and second beam, but the space in the headrail is limited and the reeling units interfere with each other, making installation and maintenance difficult
Solution Approach 1:
The patent divides the lifting control system into two independent segments: the first lifting structure (with first reeling unit) is integrated into the first beam, and the second lifting structure (with second reeling unit) is integrated into the second beam. This segmentation separates the previously conflicting reeling units into different spatial locations, eliminating interference while maintaining full control capability over both beams
Solution Approach 2:
The second reeling unit is extracted from the headrail and relocated to the second beam. The cord-guiding component that previously directed the second cord through the headrail is replaced with a direct connection, simplifying the headrail structure and removing the source of interference while preserving the ability to control the second beam
2Adaptability or versatility
If two sets of reeling units are provided in the headrail, then both beams can be controlled, but the reeling units tend to interfere with each other, making operation less smooth
Solution Approach 1:
By segmenting the lifting structures into separate beams, each with its own reeling unit, the patent eliminates the operational interference that occurred when both reeling units were confined to the headrail. This allows each beam to be operated independently and smoothly without mechanical conflicts
Solution Approach 2:
The second reeling unit is extracted from the headrail environment and relocated to the second beam, removing it from the source of operational interference. The simplified cord path (direct connection without turns through the headrail) further improves operational smoothness by reducing friction and mechanical complexity
3Reliability
If reeling units are accommodated in a headrail, then the window covering can function, but it is inconvenient to check and repair reeling units
Solution Approach 1:
The patent segments the reeling units into separate locations (first beam and second beam), making each unit independently accessible. This segmentation transforms the previously enclosed headrail configuration into an open architecture where each reeling unit can be easily reached for inspection and repair without disassembling the entire headrail structure
Solution Approach 2:
The second reeling unit is extracted from the headrail and placed in the second beam, making it externally accessible. This extraction eliminates the need to open or disassemble the headrail for maintenance, significantly improving ease of repair while preserving full functionality of the window covering system
Data Source
AI summary
A top-down bottom-up window covering includes a first beam and a second beam, which are sequentially provided below a fixture, and a covering material connecting the first beam and the second beam. A first lifting structure is installed in the first beam, and a second lifting structure is installed in the second beam. The first lifting structure is adapted to operate as the first beam is being controlled to move toward or away from the fixture, and the second lifting structure is adapted to operate as the second beam is being controlled to move toward or away from the fixture. Thus, the top-down bottom-up window covering can be easily assembled and maintained.