Rolling Shutter Slat Curved Articulation Design
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Solution Overview
Problem
Conventional roller shutters face issues with significant vertical clearance, noise due to slat rattling, and vulnerability to break-ins due to loose articulation between slats, which affects their compact retraction and security.
Innovation Solution
The design features a shutter slat with a hooking track and receiving track that form a hinge with a guard member and lip, minimizing clearance and enhancing security by preventing easy disengagement, while the curved surfaces facilitate smooth articulation and water drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If slats are made to conform to a roll with loose articulation, then compact storage is achieved, but significant vertical clearance is created causing noise and reduced security
Solution Approach 1:
The patent changes the geometric parameters of the articulation interface by introducing a curved receiving surface that matches the convex protrusion geometry. This parameter change eliminates vertical clearance while maintaining the ability to conform to a roll, resolving the contradiction between compact storage and security.
Solution Approach 2:
The patent employs curved surfaces in the articulation mechanism - a convex protrusion on one slat and a corresponding concave receiving surface on the adjacent slat. This curvature allows the slats to conform smoothly to a roll while maintaining precise alignment and eliminating clearance, thus achieving both compact storage and enhanced security.
2Ease of operation
If slats are loosely articulated to allow retraction, then retraction capability is improved, but slats rattle against each other creating noise
Solution Approach 1:
The curved articulation surfaces allow smooth relative movement between slats during retraction while maintaining continuous contact. This eliminates the rattling noise caused by loose articulation while preserving ease of operation, as the curved geometry facilitates smooth motion without gaps.
Solution Approach 2:
By changing the articulation from a gap-based system to a contact-based curved surface system, the patent eliminates the harmful rattling noise while maintaining operational ease. The curved receiving surface ensures continuous contact during movement, preventing the air gap that causes noise.
3Adaptability or versatility
If c-shaped channel is used for articulation, then flexibility is achieved, but the channel may be forced open under pressure compromising security
Solution Approach 1:
The curved articulation surfaces provide flexibility through smooth relative movement while the continuous contact geometry prevents the channel from being forced open. The curved receiving surface matches the convex protrusion, creating a positive engagement that maintains security under pressure while preserving adaptability.
Solution Approach 2:
The patent uses a composite articulation system combining a convex protrusion element with a concave receiving surface, creating a positive engagement mechanism. This composite geometry provides both flexibility for movement and security by preventing disengagement under pressure, unlike the simple c-shaped channel design.
4Ease of operation
If vertical pocket is provided for articulation, then slat movement is enabled, but clearance accumulates reducing counterbalance effectiveness
Solution Approach 1:
The patent changes the articulation geometry from a vertical pocket system to a curved surface contact system. This parameter change eliminates the vertical clearance that causes energy loss, while still enabling slat movement through the curved relative motion. The counterbalance mechanism thus works efficiently without the clearance penalty.
Solution Approach 2:
The curved articulation surfaces enable slat movement through smooth relative rotation while maintaining constant contact. This eliminates the clearance accumulation that occurs in vertical pocket designs, thereby preserving counterbalance effectiveness and reducing energy loss during operation.
Data Source
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.