Venetian Blind Slat Alignment via Loop and Recess Restraint
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Solution Overview
Problem
Traditional venetian blinds lack a mechanism to restrict transverse displacement of slats, leading to uneven alignment and a cluttered appearance when subjected to external forces or uneven forces during folding/unfolding.
Innovation Solution
The venetian blind design incorporates a headrail, bottom rail, ladder cords with loops and warps, and a lifting unit, where the loops are inserted into perforations and the pull cords are positioned in recesses to prevent excessive transverse displacement, allowing for automatic alignment of slats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional ladder cords are used to support slats, then the slats can be driven to a tilted state, but the slats cannot be restricted from excessive transverse displacement, resulting in uneven alignment
Solution Approach 1:
The ladder cord system is segmented into multiple functional components: first and second warps for support, wefts for connection, and first loops for positioning. Each segment performs a specific function - the warps provide vertical support enabling tilting, while the loops inserted into perforations restrict transverse displacement, thereby resolving the contradiction between operational ease and alignment precision
Solution Approach 2:
The first loops act as intermediary elements between the ladder cords and slats. These loops are inserted into the perforations of the slats to serve as a mediating mechanism that simultaneously allows the slats to be tilted (through the warps and wefts) while preventing excessive transverse displacement, thus maintaining alignment uniformity
2Adaptability or versatility
If the ladder cords or slats are swung to a large extent due to external force, then the slats may tilt, but this causes uneven alignment and cluttered appearance
Solution Approach 1:
The first loops inserted into the perforations provide preliminary anti-action by pre-establishing positional constraints on the slats. Before external forces can cause excessive swinging or misalignment, the loops already in place within the perforations prevent transverse displacement, thereby maintaining alignment stability while still allowing controlled tilting through the warp-weft-slat mechanism
3Ease of operation
If uneven force is applied during folding or unfolding of slats, then the slats can move, but this results in uneven alignment of the two ends of the slats
Solution Approach 1:
The system provides self-service alignment through the interaction between the first loops and perforations. During folding or unfolding operations, even when uneven force is applied, the loops automatically maintain their position within the perforations, causing the slats to self-align horizontally. This eliminates the need for external alignment mechanisms while ensuring precise end alignment throughout the operation
Data Source
AI summary
A venetian blind includes a headrail, a bottom rail, a first pull cord, and a second pull cord. Two ladder cords are provided between the headrail and the bottom rail. The ladder cords each have a first warp, a second warp, a plurality of wefts connected with the first and second wefts and supporting slats, and a plurality of first loops connected with the first warp. The slats each have a perforation passing through the top and bottom surfaces of the slat and penetrated by the first loop, and a recess provided at one of the inner and outer edges of the slat. At least one of the first pull cord, the second pull cord, the first warp, and the second warp is positioned in the recesses of the slats. As such, the venetian blind of the prevent invention can achieve an effect of automatic alignment of the slats.