Window Covering Lifting Control Apparatus Spring Segmentation
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Solution Overview
Problem
Conventional window covering lifting control apparatuses face issues with poor locating effect and shorter life span due to limited clamping force and elastic fatigue from bearing the weight of the blind, leading to difficulties in smooth operation and reduced durability.
Innovation Solution
A window covering lifting control apparatus featuring a holding unit with rollers, a locating set with gears and springs, and a pushbutton that engages and latches the lift cord assembly, distributing the weight and force across multiple springs to enhance the locating effect and extend the lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spring is used to clamp the lift cord assembly, then the structure is simple, but the spring suffers elastic fatigue quickly and the locating effect diminishes
Solution Approach 1:
The patent divides the single spring into multiple springs (first spring and second spring) that work together to clamp the lift cord assembly. This segmentation distributes the mechanical stress across multiple components, preventing elastic fatigue in a single spring and maintaining the locating effect over time, while still keeping the overall structure relatively simple.
2Device complexity
If a single spring clamps the lift cord assembly, then the device is simple, but the spring bears great force and has shorter life span
Solution Approach 1:
The patent segments the load-bearing function across multiple springs instead of relying on a single spring. Each spring bears a portion of the force, which extends the operational life span of the moving parts by distributing mechanical stress and preventing premature failure from overloading a single component.
Solution Approach 2:
The patent changes the parameter of spring quantity from one to multiple, which fundamentally alters the force distribution characteristics. This parameter change allows the system to maintain simplicity while significantly extending the life span by reducing the force burden on each individual spring.
3Device complexity
If merely a button and retaining member clamp the lift cord assembly, then the structure is simple, but the locating effect is poor when the blind weight is great
Solution Approach 1:
The patent segments the clamping function into multiple components: a button, a retaining member, and multiple springs working in conjunction. This segmentation provides multiple contact points and distribution of clamping force, improving the locating effect for heavy blinds while maintaining reasonable structural simplicity through the use of basic mechanical elements.
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 apparatus provides an improved locating effect for smooth retraction and extension of window coverings and extends the lifespan by effectively distributing the weight and force across multiple springs, ensuring easier operation and longer durability.
Implementation Method 1
a spring assembly (45) consisting of a plurality of springs... the springs of the spring assembly fasten respectively to the two locating rods (42) and two locating heads (43)... to bear the force
Data Source
AI summary
A window covering lifting control apparatus includes a holding unit, a locating set and a pushbutton. The holding unit has a first spacer and a second spacer formed thereon that are spaced from each other. The spacers have two slots inclining downwards. The first spacer has a strut on one side to be coupled with a spring on an outer side. The locating set includes two gears, two locating rods, two locating heads and a spring assembly to hold the two gears between the spacers. The pushbutton is movably coupled on the strut of the holding unit to control movement of the two gears in the slots. The window lifting control apparatus can be installed in a lower elongated member to control retraction upward or extension downward of the window covering. The two gears of the locating set can engage with and latch a lift cord assembly to provide improved locating effect.