Rolling Shutter Attachment Strap with Groove Locking Mechanism
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Solution Overview
Problem
Existing solutions for attaching rolling shutters to tubular shafts, such as those using L-shaped blades and grooves, are prone to wear and are not suitable for all shaft configurations, particularly those without specific grooves, and lack effective security against undue lifting.
Innovation Solution
An articulated strap device with L-shaped clips and push-buttons that securely attach to the tubular shaft's grooves, featuring a locking mechanism to prevent lifting, and elastic U-shaped locking elements that limit the opening angle, ensuring secure attachment and resistance to forced lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If L-shaped blades are inserted into grooves of the shaft for attachment, then the rolling shutter can be attached to the shaft, but clearance must be provided which causes wear or even failure
Solution Approach 1:
The attachment device uses a dynamic expanding mechanism where the attachment means expand after insertion into the groove to lock onto the shaft. This eliminates the need for permanent clearance while allowing easy installation and removal, resolving the contradiction between reliable attachment and manufacturing flexibility.
Solution Approach 2:
The attachment means are designed to be inserted first in a compact state, then expanded to lock onto the shaft. This preliminary insertion followed by expansion allows the groove to be precisely fitted without clearance, eliminating wear while maintaining installation ease.
2Ease of manufacture
If traditional strips fixed by rivets are used to attach slats to the shaft, then attachment is simple, but the rolling shutter can be lifted by pushing slats from below
Solution Approach 1:
The attachment device incorporates a dynamic locking mechanism where the attachment means expand after insertion to engage with the shaft groove. This expansion action creates a secure mechanical lock that prevents lifting by pushing, while the overall device remains simple to install and manufacture.
Solution Approach 2:
The attachment means have different properties at different locations: the insertion end is compact for easy entry into the groove, while the locking end expands to create a secure mechanical interlock. This local differentiation provides both simplicity of installation and security against lifting.
3Ease of operation
If L-shaped rods are inserted into grooves for attachment, then the device can be attached to the tube, but clearance is required which causes wear or failure
Solution Approach 1:
The attachment means dynamically change shape during operation: inserted in a compact form for ease of installation, then expanded to lock securely. This dynamic behavior eliminates the need for permanent clearance while maintaining easy installation, resolving the contradiction between operational ease and durability.
Solution Approach 2:
The attachment device is segmented into an insertion portion and a locking portion. The insertion portion fits into the groove without clearance, while the locking portion expands to secure the attachment. This segmentation allows precise fitting without wear while maintaining installation simplicity.
4Adaptability or versatility
If mobile parts are used to press against the walls of the cavity when inserting parallel walls, then lateral movement causes expansion against the walls, but the system is not suitable for shaft cavities in the form of a groove
Solution Approach 1:
The attachment device is designed with universal adaptability to work with shaft cavities in the form of grooves. The expanding mechanism can be activated by lateral movement during insertion, making it suitable for groove-type cavities while maintaining a relatively simple overall structure through standardized components.
Data Source
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AI summary
A device for attaching rolling shutters relating to a device whose purpose is to provide an attachment means between the first slat or upper slat of a slatted rolling shutter and the tubular rolling shaft of the same, which consists of a strap made up of several links and constitutes, at the same time, a means of security to prevent the rolling shutter from being lifted by pushing the slats from below and it only allows said lifting by rotating said shaft, due to the configuration of the gripping means of the same with the tubular shaft and the means of security that prevent said undue lifting of the rolling shutter.