Roller Blind Accessory Locking Means for Drum Groove
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Solution Overview
Problem
Current methods for securing roller shutter accessories to drums, such as using screws, glue, or screw assemblies, face issues like material tearing, oxidation, complexity, imprecision, and risk of loosening due to vibrations, leading to unreliable connections and increased assembly costs.
Innovation Solution
A roller shutter accessory with monolithic locking means that cooperate with a groove in the drum, allowing for precise and strong attachment without drilling, featuring a deformable lower part that rotates to lock in place and can be easily unlocked, and includes design elements like beveled ends and projections to manage stress during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If self-drilling screws are used to secure the accessory to the drum, then the connection strength is improved, but the risk of material tearing and oxidation increases
Solution Approach 1:
The accessory is divided into a body and a locking means that can rotate relative to each other. The locking means includes a lower part that engages with the groove in the drum, separating the insertion function from the locking function to avoid tearing the drum material.
Solution Approach 2:
The locking means is designed to rotate from an inserted position to a locked position, transforming from a static insertion element to a dynamic locking mechanism. This rotation allows the lower part to engage with the groove walls without requiring forceful drilling that could tear the thin drum material.
2Reliability
If conventional screw assemblies are used, then the connection reliability is improved, but the device complexity and assembly cost increase
Solution Approach 1:
The locking means integrates multiple functions into a single component: the body provides structural support, the lower part engages with the groove for positioning, and the rotation capability provides locking. This merges what would traditionally require separate screws, washers, and locking mechanisms into one integrated accessory.
Solution Approach 2:
The accessory is designed to be self-locking through its rotational mechanism. Once inserted into the groove, rotating the locking means causes the lower part to engage with the groove walls, creating a self-sustaining locked position without requiring additional fasteners or complex assembly steps.
3Object-affected harmful factors
If adhesive securing is used, then the risk of material tearing is reduced, but the manufacturing precision and assembly ease deteriorate
Solution Approach 1:
The lower part of the locking means acts as an intermediary element that engages with the groove in the drum. This mechanical interface provides precise positioning and alignment between the accessory and drum, overcoming the imprecision issues associated with adhesive bonding while still avoiding direct screw drilling that causes material tearing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a reliable, easy-to-assemble, and cost-effective connection that withstands rotational stress and vibrations, ensuring secure attachment and easy disassembly without material damage, reducing the risk of oxidation and assembly complexity.
Implementation Method 1
The lower part (5) deforms elastically against the walls of the groove (4) and/or deforms the walls of the drum (2)
Data Source
Figure 1~2
Figure 3~5
AI summary
The accessory has locking units (3) cooperating with a groove arranged in a drum (2) of a roller blind by exerting a rotation on the locking units. The locking units form, with a part of the accessory, a monolithic assembly, where the part receives locking units. The locking units have a lower part elastically deformed against walls of the groove and/or against walls of the drum. The groove and the accessory are sandwiched between the lower part and an upper part of the locking units to permit connection between the accessory and the drum.