Shading Device Upward Pin Connection for Guide Rails Installed From Below
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Solution Overview
Problem
Existing building opening shading devices, such as roller shutters, face challenges in connecting side guide rails to the roller shutter box due to installation constraints, particularly when the guide rail cannot be directly attached from below, as is common in surface-mounted installations.
Innovation Solution
The solution involves a connecting pin on the side guide rail that projects upward and is inserted into a pin receptacle on the side part, with the receptacle having a specific geometry to allow oblique positioning, and a separate clip connection for secure anchoring, enabling the guide rail to be mounted from below.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a downward-protruding connecting pin on the roller shutter box is used, then the guide rail can be securely connected, but the packaging size increases and installation from below is prevented
Solution Approach 1:
The patent inverts the conventional connection approach by moving the connecting pin from the roller shutter box to the guide rail itself. The pin now protrudes upward from the guide rail's upper end and inserts into a receptacle on the box, enabling installation from below while reducing packaging volume.
Solution Approach 2:
The connecting pin is segmented into two separate components: a pin on the guide rail and a receptacle on the box. This segmentation allows the pin to be positioned on the guide rail rather than the box, facilitating upward insertion and installation from below while compacting the overall structure.
2Ease of operation
If the guide rail is positioned vertically for connection, then alignment is simplified, but installation from below is blocked by the window sill and masonry
Solution Approach 1:
The pin receptacle is designed with asymmetric geometry, featuring a beveled front wall that creates a funnel-shaped opening. This asymmetric design guides the pin at an oblique angle during installation from below, then allows the guide rail to be hinged into its final vertical position, combining ease of installation with proper alignment.
Solution Approach 2:
The connection process is made dynamic through a two-stage motion: first, the guide rail is positioned obliquely to allow pin insertion from below; second, the guide rail is hinged upward to achieve the final vertical position. This dynamic positioning sequence resolves the conflict between installation accessibility and alignment precision.
3Ease of operation
If the pin receptacle has a small opening, then structural integrity is maintained, but the connecting pin cannot be inserted at an oblique angle
Solution Approach 1:
The pin receptacle employs local quality differentiation: the front wall features a beveled opening with a larger effective area to accommodate oblique pin insertion, while the rear and side walls maintain compact dimensions to preserve structural integrity and minimize packaging volume. This localized geometric variation enables both oblique insertion and structural strength.
Data Source
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AI summary
The invention relates to a building opening shading device (3), a side panel (13) and a side guide rail (11) therefor, as well as a connecting pin (14) for connecting the side guide rail (11) to a side panel (13) of the building opening shading device (3). The connecting pin (14) has a pin lower part (20) that can be attached to the side guide rail (11) and a pin upper part (21) that can be inserted into a pin receptacle (15) of the side panel (13) and is characterized in that the pin upper part (21) has an approximately rectangular cross-sectional contour extending upwards from the pin lower part (20), wherein the pin upper part (21) has a broad chamfer (24) on at least one broad side, so that the pin upper part (21) tapers to a point or a frustoconical shape when viewed from one of its narrow sides.