Lamellar Blind Guide Rail Segmentation for Slat Stability
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Solution Overview
Problem
External venetian blinds face instability when raising or lowering the curtain due to tilting caused by wind or misalignment of slats, and existing solutions do not adequately address the issue of light gaps between slats for improved shading.
Innovation Solution
The implementation of guide rails with separate guide grooves for the bottom bar and blind slats, featuring elongated guide heads or rollers to prevent pivoting and wind displacement, combined with eccentric bolting and beaded edges for enhanced stability and light-tightness, ensures the slats lie congruently and securely, reducing noise and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the lift tapes are guided through the slat profiles behind the closed slat front to eliminate light gaps, then shading performance is improved, but the slat stack becomes unstable and prone to tilting when raised or lowered
Solution Approach 1:
The guide system is segmented into separate components: guide rails with guide grooves for lateral guidance, and guide bodies with guide heads for vertical guidance. This segmentation allows independent optimization of shading (through slat alignment) and stability (through separate guiding mechanisms), resolving the contradiction between light-tightness and stack stability.
Solution Approach 2:
Guide bodies with elongated guide heads act as intermediaries between the slats and the guide rails. These guide bodies transmit both the lateral alignment function (for shading) and the vertical stability function (preventing tilting), effectively mediating between the conflicting requirements of light-tightness and stack stability during operation.
2Stability of the object's composition
If the guide heads are elongated in the direction of the guide groove to prevent pivoting, then stability is improved, but the complexity of the guide body increases
Solution Approach 1:
Instead of making the guide groove complex to prevent pivoting, the solution inverts the approach by making the guide head elongated while keeping the guide groove simple. This inversion transfers the complexity from the stationary component to the moving component, achieving stability without complicating the guide rail structure.
Data Source
AI summary
The invention relates to a venetian blind with a curtain consisting of slats (1) that can be raised and lowered by means of a number of lifting tapes (3) and a lower end bar (4), wherein the number of lifting tapes (3) engages the end bar (4), with a further number of pivoting tapes (2) engaging at least one of the two longitudinal sides of the slats (1), by means of which the slats (1) can be pivoted, at least when the curtain is lowered, between a shading position with the slats (1) raised from each other and a shading position with the slats (1) lying against each other, and with a guide rail (6) on one or each of the two sides of the curtain, wherein an outwardly projecting guide body (7, 8) extending into a guide groove of the associated guide rail (6) is attached to one or each of the two narrow sides of the end bar (4) and at least a part of the slats (1).to guide the end slat (4) and the curtain slats (1), wherein the end slat (4) is guided in one or both guide rails (6), each guide body (7) of the end slat (4) having a guide head received in the associated guide groove and extending longitudinally in the guide groove direction, and/or at least two guide heads (17) received in the associated guide groove (15) and spaced apart in the guide groove direction. The invention is characterized in that the guide rails (6) each have a guide groove (15) for the end slat (4) on the one hand and, in a direction transverse to the curtain, another guide groove (16) for the guided curtain slats (1) on the other hand, so that the end slat (4) on the one hand and the guided curtain slats (1) on the other hand are each guided in their own guide grooves (15, 16).