Double Fabric Blind Angle Adjustment Mechanism
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Solution Overview
Problem
Conventional double fabric blinds lack the ability to adjust the spread angle of connection fabrics at desired positions, such as the middle or upper sections, and pose safety hazards due to the use of drop-down strings that can entangle children.
Innovation Solution
A device for adjusting the fabric angle of double fabric blinds, featuring a cover with hook protrusions, a rotation component with coupling grooves, a stopper with guide and inclined grooves, and a fixing shaft with a spring, which allows for precise adjustment of the fabric openness by rotating balls in a guide groove, eliminating the need for adjustable strings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drop-down string is used to adjust the fabric angle, then the fabric openness can be adjusted, but safety hazards arise due to entanglement risk for children
Solution Approach 1:
The patent removes the drop-down string from the system entirely and replaces it with a rotary adjustment mechanism consisting of a rotation component with balls that engage with grooves on the fabric roll. This extraction of the harmful element (string) while maintaining the adjustment function resolves the safety hazard without sacrificing operational capability.
2Ease of operation
If a friction member is used to adjust the degree of openness, then the fabric angle can be adjusted, but the abrasiveness deteriorates over time reducing adjustment precision
Solution Approach 1:
The patent replaces the friction-based mechanical adjustment system with a groove-and-ball engagement system. The rotation component features grooves that receive balls, creating a positive mechanical engagement that maintains precise adjustment positioning without the wear and deterioration characteristic of friction members.
3Device complexity
If conventional roll blinds with weight-only spreading are used, then the structure is simple, but the ability to spread connection fabric at desired positions is limited
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism where the rotation component can be rotated to different angular positions, allowing the connection fabric to be spread at various desired positions along the fabric roll. The groove-and-ball system maintains structural simplicity while enabling versatile position adjustment through rotational movement.
Data Source
AI summary
The present invention relates to double fabric blinds and, more particularly, to a device for adjusting a fabric angle of the double fabric blinds, which is capable of finely adjusting an degree of openness of a front sheet, wherein a plurality of balls are sequentially held in a holding groove, e.g., as four or eight balls, inserted into an insertion groove of a rotation component, wherein the plurality of balls are rotated in a guide groove of a stopper by approximately 90 degrees or 45 degrees, thereby improving safety and omitting the use of a conventional string.