Rolling Shutter Slat with Hooked Articulation for Compact Retraction
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Solution Overview
Problem
Conventional roller shutter slats face issues with excessive clearance, noise, and unsightly retraction due to loose articulation, which affects their compact storage and security, and they are prone to water intrusion and damage.
Innovation Solution
The design features a shutter slat with a curvature, a hooking track, and a receiving track that includes a guard member and a lip member, with an articulation space to minimize clearance and enhance security, allowing for tight nesting and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If loose articulation is provided between slats to enable retraction, then the shutter can be retracted into a casing, but excessive clearance (up to 6.35mm per slat) is created between slats
Solution Approach 1:
The patent changes the geometric parameters of the articulation components. The hook-shaped profile at the upper edge and the corresponding pocket with guard at the lower edge are designed with specific dimensions that reduce clearance to approximately 1.5mm per slat, compared to 6.35mm in conventional designs. This parameter optimization allows the shutter to retract while maintaining tight slat spacing.
2Adaptability or versatility
If loose articulation with vertical projection and horizontal aperture is used, then slats can pivot for retraction, but significant noise is generated during extension and retraction
Solution Approach 1:
The patent optimizes the dimensional parameters of the articulation components. By reducing the clearance between the vertical projection and the horizontal aperture to approximately 1.5mm, the slats pivot with minimal clearance, significantly reducing the rattling noise during extension and retraction while maintaining the necessary pivoting capability.
3Ease of operation
If conventional articulation with large clearance is used, then slats can move freely, but the shutter requires a large casing for storage
Solution Approach 1:
The patent changes the clearance parameter from 6.35mm to approximately 1.5mm per slat. This reduction in clearance allows the shutter to retract into a more compact casing with smaller volume, while the slats still maintain sufficient freedom of movement for operation. The tight nesting is achieved through optimized geometric parameters of the articulation components.
4Volume of stationary object
If c-shaped channel and screw boss configuration is used, then compact storage is achieved, but the slats may separate undesirably under pressure
Solution Approach 1:
The patent employs asymmetric geometric profiles in the articulation components. The hook-shaped profile at the upper edge and the corresponding pocket with guard at the lower edge create an asymmetric engagement that prevents undesired separation under pressure while allowing controlled pivoting. This asymmetric design enhances the reliability of slat connection compared to symmetric c-shaped configurations.
Solution Approach 2:
The patent uses curved surfaces in the articulation components, specifically the hook-shaped profile and the pocket geometry. These curved surfaces provide smooth engagement and disengagement while maintaining secure connection. The curvature allows for gradual load distribution and prevents sudden separation under pressure, enhancing the reliability of the slat connection.
Data Source
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AI summary
A slat for use in a rolling shutter is provided. The slat comprises a hooking track located at a first edge of a body and a receiving track located at a second edge of the body. Illustratively, the hooking track has a hook-shaped profile, and the receiving track comprises a lip member and a guard member defining a space adapted to receive therein an engaging track of an adjacent slat. The hooking track and the receiving track are designed to minimize the space required for the rolling shutter to be retracted around a spindle.