Dual Roll Blind Single Ball-Chain Gear Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional roll blinds cannot uniformly control light transmission across a glass window or glass wall, and existing solutions that attempt to address this issue are often complex, costly, and prone to durability issues due to the need for separate mechanisms to control light transmission and screen overlap.
Innovation Solution
A dual roll blind system with two screens having alternating light transmission and shielding portions, driven by a single ball-chain mechanism, utilizing a gear system, slide drive device, and clutch mechanism to simplify operation and control both light transmission and screen movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate operating apparatus are used to control the overlapped amount of two roll screens and to control the light transmission amount, then the light transmission amount can be controlled, but the operation becomes complicated and the device becomes complicated
Solution Approach 1:
The patent combines two separate operating mechanisms into a single ball-chain operating apparatus. The ball-chain is wound around a winding bar that is coupled to both first and second winding rolls through gear mechanisms, allowing simultaneous control of both screens' light transmission and overlap positioning through one operating chain.
Solution Approach 2:
The single ball-chain operating apparatus performs multiple functions: it controls the light transmission amount by adjusting the overlap between screens, and it controls the ascent and descent of both roll screens. This multi-functional design eliminates the need for separate operating mechanisms.
2Illumination intensity
If two sheets of roll screens with alternating light transmitting and shielding portions are disposed to control light transmission, then uniform light control is achieved, but the device becomes too big and complicated
Solution Approach 1:
The patent merges the light transmission control function and the screen positioning function into a single integrated system. By using one ball-chain to control both the overlap amount and the ascent/descent of screens, the device achieves uniform light control without requiring separate complex mechanisms for each function.
Solution Approach 2:
The dual roll screen system with alternating light transmitting and shielding portions serves multiple purposes: it provides uniform light transmission control across the entire window area and enables both screens to be controlled simultaneously through a single operating mechanism, reducing overall device complexity.
3Measurement precision
If separate operating apparatus are used for controlling overlap and light transmission, then precise control is achieved, but the cost increases and durability deteriorates
Solution Approach 1:
The patent combines multiple control functions into a single ball-chain operating system that simultaneously controls the overlap amount and the ascent/descent of both screens. This integration reduces the number of mechanical components, thereby improving durability and reducing cost while maintaining control precision through the gear-coupled winding mechanism.
Data Source
AI summary
The present invention relates to a dual roll blind enabling to control its light transmission amount and open and close with one ball-chain. The dual roll blind comprises a first screen and a second screen having light transmission portions and light shielding portions, respectively, a first winding bar and a second winding bar for respectively winding the firstscreen and the second screen, a first axis of rotation and a second axis of rotation to which the first winding bar and the second winding bar are respectively coupled, a first gear coupled to the first axis of rotation and rotationally driving the first winding bar, a second gear coupled to the second axis of rotation and rotating the second winding bar with rotating dependently on the first gear, a driving wheel rotating by a driving string and coupled to the first axis of rotation to transfer rotational force of the driving string to the first gear and the winding bar, a slide drive device engaging with the driving wheel to receive rotational force of the driving wheel and slide the first winding bar in a longitudinal direction of the first axis of rotation.