Roller Shutter Housing Anti-Glare Cap Spacer Cam Design
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Solution Overview
Problem
Existing anti-glare caps for roller shutter boxes do not fit seamlessly with either sheet metal or extruded roller shutter boxes, leading to aesthetic issues and logistical complexities in mounting, as they either fail to cover cut edges or protrude excessively, requiring separate guide rails for each type.
Innovation Solution
The use of spacer cams distributed over the circumference of the blind cap, which engage with grooves in the roller shutter box, ensures the cap is flush with the outer surfaces, allowing for a common guide rail to be used with both sheet metal and extruded roller shutter boxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the edge thickness of anti-glare caps is increased to cover cut edges of extruded roller shutter boxes, then the aesthetic appearance is improved, but the caps protrude laterally in thin-walled sheet metal roller shutter boxes and prevent proper mounting of guide rails
Solution Approach 1:
The blind cap is designed with non-uniform thickness distribution: thicker at the outer peripheral edge to cover cut edges of extruded boxes, and thinner at the inner region where guide rails are mounted. This local differentiation allows the cap to satisfy both aesthetic requirements for extruded boxes and mounting requirements for sheet metal boxes.
Solution Approach 2:
The patent introduces variable geometric parameters in the blind cap design, specifically the thickness distribution and the positioning of the mounting surface relative to the outer peripheral edge. These parameter variations enable the single cap design to adapt to different roller shutter box types.
2Shape
If separate blind caps are designed for sheet metal and extruded roller shutter boxes to achieve proper fit and appearance, then the aesthetic appearance is improved, but the device complexity and logistical requirements increase
Solution Approach 1:
The blind cap is designed as a universal component that can be used with both sheet metal and extruded roller shutter boxes. The key feature is that the distance between the mounting surface for guide rails and the outer peripheral edge is at least equal to the material thickness of the roller shutter box, allowing the same cap design to accommodate different box types.
3Device complexity
If a single blind cap design is used for both sheet metal and extruded roller shutter boxes, then the device complexity is reduced, but the cap cannot achieve flush fit with outer surfaces of both types
Solution Approach 1:
The blind cap incorporates localized thickness variations and strategically positioned mounting surfaces that adapt to different box types. The outer peripheral edge thickness is sufficient to cover cut edges of extruded boxes, while the mounting surface positioning ensures proper alignment for both sheet metal and extruded boxes.
Solution Approach 2:
The design utilizes variable parameters including the distance from the mounting surface to the outer peripheral edge (set to be at least equal to the maximum material thickness), and the thickness distribution across the cap. These parameter choices enable the single cap design to achieve flush fit with different box types.
Data Source
Figure 1a~1b
Figure 2a~2b
AI summary
The roller-shutter case (3) has case-sided terminal panel casings (1), where the panel casings have distance cams (2) at a circumference. Grooves (4) are provided at an inner surface in the field of distance cams of the extruded case, where the grooves are wider than the distance cams.