Curtain Rolling Buffer with Oil Damping for Quiet Retraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing curtain rolling systems generate noise due to high friction coefficients during curtain retraction, which can damage the curtains and create irritating sounds.
Innovation Solution
A buffer apparatus with a casing containing lube oil and a spring mechanism, where the spring is surrounded by a bushing with an oil seal and cap, reduces friction by allowing the spring to run idle during extension and generates a reaction force to slow down the curtain during retraction, minimizing noise and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a buffer apparatus is used to control curtain retraction speed, then the curtain can be retracted slowly and smoothly, but the friction coefficient becomes large and generates noise
Solution Approach 1:
The patent introduces lube oil as an intermediary substance between the spring and the bushing. The lube oil film acts as a mediator that reduces direct friction contact while still providing the necessary resistance to control retraction speed. This resolves the contradiction by enabling slow controlled retraction without the high friction noise of traditional buffer mechanisms.
Solution Approach 2:
The patent utilizes the hydraulic properties of lube oil to provide damping and friction control. The oil's viscosity and pressure characteristics create a controlled resistance force that slows curtain retraction without the mechanical friction noise of solid-to-solid contact. The oil film thickness and pressure dynamically adjust to provide smooth, quiet operation.
2Ease of operation
If the spring force is increased to ensure curtain retraction, then the curtain can be pulled easily for extension, but the spring generates excessive force during retraction causing noise and potential damage
Solution Approach 1:
The patent changes the physical state and pressure parameters of the lube oil based on spring position. When the spring is compressed during extension, the oil pressure increases, providing smooth operation. When the spring expands during retraction, the oil pressure decreases, reducing the retarding force. This dynamic parameter change allows easy extension while preventing excessive retraction force.
Solution Approach 2:
The lube oil provides beforehand cushioning by creating a compliant medium that absorbs and dampens spring force variations. The oil film acts as a cushion that prevents sudden force spikes during retraction, protecting the curtain from damage while maintaining easy extension operation.
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 solution significantly reduces noise during curtain retraction and ensures smooth extension and slow retraction, preventing creases and damage to the curtains.
Implementation Method 1
The lube oil outside the bushing generates a resistance and reaction force in the opposite direction to lower the rolling speed of the curtain and prevent the noise from generating
Implementation Method 2
The spring force is small than the lube oil pressure hence the curtain may be pulled and extended easily
Data Source
AI summary
An improved curtain rolling buffer apparatus mainly includes a rolling means mounted to a left end of the track to allow the curtain hanging below the track to be extended by pulling once and retracted by pulling another time. A buffer means is located on the right end of the track and has a bushing housing a spring. When to extend or retract the curtain, the spring is turned clockwise and extended outwards, and runs idle outside an axle, and the elastic force of the spring is smaller than the pressure of lube oil so that the curtain is easier to be extended. On the contrary, when the spring is turned counterclockwise, it is tightened and drives the bushing to rotate together.