Window Blind Slat Folding Mechanism Without Through Holes
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Solution Overview
Problem
Conventional window blinds with cords passing through slats for folding mechanisms compromise light-blocking efficiency due to the need for through holes in the slats, which affect their performance when adjusted to an inclined position.
Innovation Solution
A window blind design featuring a top beam with lateral holes for lift transmission cords and a slat folding transmission device that eliminates the need for holes in the slats, using a cord rolling member and lift transmission cords to fold the slats without processing holes, along with an angle adjusting device for smooth operation and improved light blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cords pass through slats for folding mechanisms, then the slats can be folded up, but the slats cannot block light effectively when adjusted to an inclined position
Solution Approach 1:
The cord system is segmented into separate functional components: lift transmission cords for folding and angle adjusting cords for inclination control. This segmentation allows each cord system to operate independently without requiring holes through the slats, thus maintaining light-blocking capability while enabling both folding and angle adjustment functions.
Solution Approach 2:
A cord guiding seat is introduced as an intermediary component that guides and directs the cords. The guiding seat includes guiding rods that redirect the angle adjusting cords at specific angles, enabling the cords to push slats for inclination adjustment without passing through them. This intermediary structure solves the contradiction by providing a mechanism for angle control that preserves slat integrity and light-blocking performance.
2Ease of operation
If through holes are processed in slats for cord passage, then the folding mechanism can operate, but the slat structure becomes incomplete and light-blocking performance deteriorates
Solution Approach 1:
The cord transmission function is extracted from the slat structure itself and relocated to external components (cord guiding seat and guiding rods). This extraction eliminates the need to process holes in the slats, preserving their structural completeness and light-blocking performance while maintaining the necessary cord transmission functionality through alternative external guidance mechanisms.
3Device complexity
If cords are arranged to pass through slats, then the folding mechanism is simple, but cord entanglement and operational smoothness are compromised
Solution Approach 1:
The cord guiding seat with guiding rods serves as an intermediary that organizes and separates the lift transmission cords and angle adjusting cords. This intermediary structure prevents cord entanglement by providing dedicated guidance paths for each cord, improving operational smoothness while adding only moderate complexity to the overall system.
Solution Approach 2:
The cord arrangement transitions from a two-dimensional planar layout (cords passing directly through slats) to a three-dimensional spatial arrangement guided by the cord guiding seat and guiding rods. This dimensional change allows cords to be routed in different spatial directions, preventing entanglement and improving operational smoothness.
Data Source
AI summary
A window blind includes top and bottom beams, and many slats disposed therebetween. The top beam has two opposite lateral holes. The window blind further includes a slat folding transmission device having a cord rolling member disposed in the top beam, and two opposite lift transmission cords passing through the lateral holes of the lateral plates of the top beam respectively. Two ends of each lift transmission cord are connected with the bottom beam and the cord rolling member respectively, so that the two lift transmission cords can pull the bottom beam simultaneously when being rolled by the cord rolling member, thereby moving the bottom beam upwardly to fold up the slats. Therefore, the slats of the window blind of the invention need no processing and keep complete in structure, thereby providing good effect of blocking out the light when being adjusted to the inclined condition.