Roller Screen Spring Adjustment for Smooth Retraction
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Solution Overview
Problem
Existing screen devices lack the ability to adjust the initial winding of the coil spring integrated in the roller pipe, which is essential for optimal opening and closing operability, especially when dealing with varying sizes and structures of openings in buildings.
Innovation Solution
The screen device includes a roller pipe with a revolving shaft and an integrated coil spring, where the stator connected to the revolving shaft can be rotated to adjust the initial winding, and the upper and lower slide guide frames are designed to be flexible and retractable, allowing for fine adjustments and optimal resilient force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the initial winding of the coil spring is applied in advance in the manufacturing plant, then the screen device can be mass-produced with standardized settings, but the opening and closing operability cannot be optimized for different building opening sizes and structures
Solution Approach 1:
The patent makes the initially wound coil spring adjustable after assembly by introducing a rotation mechanism for the stator. The stator can be rotated relative to the housing frame to change the initial winding amount of the coil spring, allowing the resilient force to be dynamically adjusted according to different building opening sizes and screen weights, while maintaining the benefits of initial winding for mass production
Solution Approach 2:
The patent changes the parameter of initial winding amount from a fixed value set during manufacturing to an adjustable parameter. By enabling rotation of the stator, the initial winding amount can be modified to change the resilient force, allowing optimization for different application scenarios while keeping the basic mass production process intact
2Reliability
If the coil spring's resilient force is increased to ensure proper retraction of larger screens, then the opening and closing operability improves for large screens, but the operation becomes too forceful and difficult for smaller screens
Solution Approach 1:
The patent allows adjustment of the resilient force parameter by rotating the stator to change the initial winding amount of the coil spring. This enables matching the resilient force to the specific screen size and weight, ensuring reliable retraction for large screens while maintaining easy operation for smaller screens
Solution Approach 2:
The patent introduces dynamic adjustability of the resilient force through the rotatable stator mechanism. The resilient force can be changed from a fixed value to an adjustable parameter, allowing optimization of the balance between retraction reliability and ease of operation for different screen configurations
3Stability of the object's composition
If the slide guide frames are made rigid to maintain linearity during opening and closing, then the structural stability is improved, but the ability to retract into the housing frame is reduced
Solution Approach 1:
The patent divides the slide guide frame into multiple rigid units that are coupled together. Each unit maintains rigidity and linearity, but the segmented structure allows the overall frame to bend and retract into the housing frame during operation
Solution Approach 2:
The patent enables the slide guide frame to retract into the housing frame by allowing the segmented rigid units to fold and nest within the available space during retraction, maximizing the use of internal volume while maintaining structural integrity
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
This design enables the screen device to achieve superior opening and closing operability by allowing for the adjustment of the resilient force of the coil spring, ensuring optimal performance across different sizes and structures of openings, and facilitates easy length adjustment and maintenance.
Implementation Method 1
a roller pipe (3) to which one of left and right ends of the screen (2) is attached, the roller pipe configured to be rotated by a resilient force of an integrated coil spring (6)
Data Source
AI summary
In a screen device, to provide a screen device in which a roller pipe includes a revolving shaft 5 on which a coil spring 6 is wound integrated therein, connected to a rotator 52 rotatably disposed with respect to a stator 51 connected to a lower end of the revolving shaft, and is rotatably stored in a housing frame, the stator includes a plurality of radially arranged claws 53, holding portions 57 arranged radially on a lower surface portion of a cap member 55 which is detachably disposed at a lower end of the housing frame corresponding to the claws of the stator are disposed, the holding portions each have a holding space 58 for receiving the claw in the interior thereof, the holding space is opened outward at one end on the side of receiving the claw and closed at the other end to allow adjustment of initial winding of a coil spring integrated in a roller pipe and superior in opening-and-closing operability of a screen and manner it is retracted.