Horizontal Synchronized Balancing System for Cordless Blinds
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Solution Overview
Problem
Conventional pull/lift cord horizontal blinds pose a safety hazard to children and are inconvenient due to uneven operation and the need for physical locks to maintain position.
Innovation Solution
A horizontal synchronized balancing system that uses friction balance point brass rollers to achieve balanced, synchronized, and level operation of the blind slats and bottom rail without cords, utilizing a spring box and lift cords wrapped around brass rollers for balanced tension and weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pull/lift cords are used to raise and lower the blind slats and bottom rail, then the blind can be positioned at various heights, but it creates a safety hazard to small children and requires physical locks to maintain position
Solution Approach 1:
The patent removes the hazardous pull/lift cords from the system entirely. Instead, it uses a spring mechanism with a cord reel that winds and unwinds to control the bottom rail position, eliminating the need for external pull cords that children could access and misuse while maintaining the blind positioning function.
Solution Approach 2:
The patent introduces a spring mechanism as an intermediary between the user's manual input and the blind positioning system. The spring absorbs and releases energy to maintain position without requiring continuous cord tension or physical locks, thereby eliminating safety hazards while preserving positioning capability.
2Object-affected harmful factors
If conventional cordless blind systems are used without friction balance points, then cord safety hazards are eliminated, but the bottom rail and slats become askew or uneven when lifted or drawn downward unless done from the exact center
Solution Approach 1:
The friction balance points enable the lift cords to self-regulate and self-balance the bottom rail position. When the bottom rail is moved, the friction balance points automatically adjust the cord tension to maintain level operation without requiring user intervention or precise center-lifting technique.
Solution Approach 2:
The patent introduces friction balance points that change the friction parameter of the lift cords at specific locations. This friction modification allows the cords to maintain balanced tension and keep the bottom rail level during operation, eliminating the requirement for center-lifting while maintaining safety.
3Ease of operation
If spring box torsion is not matched with lift cords, then cordless operation is achieved, but the bottom rail and slats exhibit bounce back or downward slippage when released
Solution Approach 1:
The friction balance points act as a feedback mechanism that continuously monitors and adjusts cord tension. When the bottom rail is released, the friction balance points detect position changes and automatically adjust the spring box torsion to maintain stable positioning, preventing bounce back or slippage while preserving cordless operation.
Solution Approach 2:
The patent makes the spring box torsion dynamic by allowing it to automatically adjust based on the position and movement of the bottom rail. The friction balance points enable this dynamic adjustment, ensuring the torsion matches the lift cord tension at all times to maintain stability during cordless operation.
4Force
If multiple spring boxes are used to support the blind, then the weight capacity is increased, but the complexity of achieving synchronized operation increases
Solution Approach 1:
The patent merges the operation of multiple spring boxes through the friction balance points and the unified bottom rail structure. All spring boxes are connected through the lift cords that pass over the friction balance points, creating a synchronized system where movement of one spring box automatically coordinates with others, reducing operational complexity while maintaining weight support capacity.
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 system ensures balanced and synchronized operation of the blind slats and bottom rail, reducing manual effort required for lifting and lowering, and eliminating the need for physical locks or cord management, thereby enhancing safety and convenience.
Implementation Method 1
a gap being defined between the brass roller and the steel rod fitted in the brass roller, whereby the steel rod only contacts with the brass roller on the top line of the steel rod allowing the brass roller to rotate
Data Source
AI summary
A horizontal synchronized balancing system includes a rail, a spring box disposed in the rail, at least two friction balance point brass rollers and at least two lift cords. A head end of the lift cord is wound on the cord reel of the spring box, while a tail end of the lift cord is conducted out of two sides of the spring box through a lower side of the brass roller of the friction balance point brass roller and then wound on an upper side of the friction balance point brass roller and then conducted downward through a hole in the middle of the tap drum support. By means of the tension support of the cord reel in the spring box and the weight support of the bottom rail and the slats and the synchronization provided by the friction balance point brass rollers, the bottom rail and the slats are always kept in balancing position and balancing weight. Therefore, when the bottom rail is manually moved to any height.