End Weight Device for Horizontal Fabric Blind
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Solution Overview
Problem
Conventional horizontal fabric blinds with vertical opening and closing capabilities experience light leakage due to the end weight device tilting, causing separation between shading slats and mesh screens when fully deployed, leading to incomplete sunlight blocking.
Innovation Solution
An end weight device with a bar-shaped fixing plate and eccentric weight mechanism is integrated into the blind, ensuring the shading slats maintain vertical balance and proper tension between mesh screens by attaching to both ends with double-sided tape and using a hook-style fastening system, preventing separation and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the operating string is fully pulled to close the front and rear meshed screens, then the light-shielding slats are vertically overlapped to block sunlight, but the end weight device remains tilted and does not maintain proper tension, causing light leakage
Solution Approach 1:
The end weight device uses a weight (19) suspended from the fixing plate (3) to provide counterbalancing force. The weight creates tension that pulls the fixing plate horizontally, counteracting the tilt that occurs when the operating string is fully pulled, thereby maintaining proper alignment of the light-shielding slats and preventing light leakage
Solution Approach 2:
The fixing plate (3) is designed with an asymmetric structure where one end extends further than the other, creating a longer arm for the operating string attachment. This asymmetric lever arm provides mechanical advantage, allowing the weight to generate sufficient horizontal tension force to maintain proper alignment of the meshed screens and slats during full closure
2Object-affected harmful factors
If the light-shielding slats are tilted to vertical position for full light blocking, then the shading effect is improved, but the separation between slats and mesh screens increases causing incomplete closure
Solution Approach 1:
The suspended weight (19) provides continuous tension force through the fixing plate (3) to the light-shielding slats (15). This tension maintains firm connection between the slats and mesh screens even when the slats are in vertical position, preventing separation and ensuring complete closure for optimal sunlight blocking
Solution Approach 2:
The fixing plate (3) is pre-installed with the weight (19) attached before the blind is assembled. This preliminary configuration ensures that the tensioning force is already in place, maintaining proper alignment and connection between components from the moment the blind is installed, preventing separation issues before they occur
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
The end weight device effectively maintains the vertical position of shading slats, preventing sunlight leakage and ensuring complete closure between mesh screens, even when the slats are shifted from horizontal to vertical, thus enhancing light blocking efficiency.
Implementation Method 1
the end weight device will maintain the balance vertically against the floor for blocking the leakage of the sunlight
Implementation Method 2
An end weight device with a bar-shaped fixing plate and eccentric weight mechanism is integrated into the blind
Data Source
AI summary
An end weight device for horizontal fabric blind includes the front and rear meshed screens fixed to a winding rod rotatably installed inside a head rail. The front and rear meshed screens are secured to each edge of a plurality of shield slats, so that sunlight can be shielded. While the plurality of shield slats is maintained in a level state, the blind allows entering the sunlight and venting air. The meshed screens are tensioned responding to pull the operating string. Since a plurality of shield slats are maintained in a level state with the front and back meshed screens due to the end weight device, the front and rear meshed screens are not separated from each other.