Roman Blind Side-Rail Clips for Easier Roof Window Installation
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Solution Overview
Problem
The installation of screening arrangements in roof windows, particularly those with Roman blinds, is complicated by the need for precise alignment and engagement of connecting devices with side rails, which is further hindered by gravity and the complexity of connecting two devices simultaneously, making it difficult for non-experts to mount correctly without errors.
Innovation Solution
The connecting clips can assume three positions: one with the L-shaped tab in the track and the resilient tab outside, another with both tabs in the track and the resilient tab biased, and a third with both tabs in the track and the resilient tab non-biased, allowing for easy connection to side rails without manual handling and providing temporary retention for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional connecting devices are used to connect transverse elements to side rails, then the screening arrangement can be assembled, but the installation process becomes complicated and difficult for non-experts to mount correctly
Solution Approach 1:
The connecting device is designed to perform the alignment and engagement functions automatically during installation. The L-shaped tab self-aligns with the track through gravity and geometry, and the resilient tab automatically engages with the flange to secure the connection, eliminating the need for complex manual alignment procedures by installers
Solution Approach 2:
The connecting device is pre-configured with the L-shaped tab and resilient tab in specific positions that enable automatic engagement. The resilient tab is pre-biased to exert force on the flange, and the L-shaped tab is pre-positioned to align with the track, so that when the device is installed, the connection occurs automatically without requiring the installer to perform complex alignment actions
2Ease of operation
If connecting devices are engaged with the track based on friction forces, then the installation may be simpler, but the operation of the screening arrangement cannot be carried out smoothly
Solution Approach 1:
The engagement function is extracted from friction-based contact and replaced with positive mechanical engagement. The L-shaped tab is designed to fit into the track with specific geometric constraints, and the resilient tab provides positive contact with the flange, creating a deterministic engagement mechanism that eliminates reliance on friction forces
Solution Approach 2:
The connecting device incorporates dynamic elements that adapt during operation. The resilient tab can flex and adjust its position within the track while maintaining engagement, allowing the connection to accommodate operational movements of the screening arrangement while maintaining smooth operation without binding or binding
3Stability of the object's composition
If two connecting devices need to be connected to two opposing side rails, then the screening arrangement is stable, but the installation becomes more difficult
Solution Approach 1:
The connection system is segmented into identical, independent connecting devices that can be installed separately on each side rail. Each connecting device is a self-contained unit with L-shaped tabs and resilient tabs that perform the same function independently, allowing installers to work on one side at a time rather than coordinating complex simultaneous connections across both sides
Solution Approach 2:
The connecting device is designed as a universal component that can be used on both opposing side rails with identical installation procedures. The same L-shaped tab and resilient tab configuration works for both left and right side rails, eliminating the need for different connection methods or complex coordination between sides
4Reliability
If the resilient tab is always biased against the second flange, then the connecting device is securely retained, but the installation process becomes more difficult due to constant resistance
Solution Approach 1:
The resilient tab transitions from a static pre-biased state to a dynamic state during installation. When the connecting device is inserted into the track, the resilient tab is compressed between the first flange and the second flange, temporarily reducing the bias force. Once installed, the tab returns to its biased state, providing secure retention. This dynamic behavior allows easy installation followed by reliable retention
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
Facilitates easier installation and operation of the screening arrangement by allowing slight movement of connecting clips in the track, reducing the risk of erroneous installation and ensuring smooth operation, even in inclined window frames.
Implementation Method 1
at least one resilient tab. The resilient tab is able to assume a first position, in which the L-shaped tab is inserted into the hollow interior of the track and is in contact with the first flange while the resilient tab is outside the hollow interior, a second position, in which the L-shaped tab is inserted into the hollow interior of the track and the resilient tab is in contact with the second flange and is biased
Data Source
AI summary
A screening arrangement (1) for a window, in particular a roof window, having a supply condition and a condition of use, the screening arrangement defining, in the condition of use, a first longitudinal direction, and a second longitudinal direction, and a screening plane substantially parallel to a plane defined by the first and second directions, the screening arrangement comprising two operating elements (71, 72) extending in the first direction a screening body (61) extending, in the condition of use, substantially in the screening plane between the two operating elements (71, 72), two side rails (8, 9), each extending, in the condition of use, in the second direction, each side rail (8, 9) having a track including a hollow interior (81) and an access slot (82) extending between a first flange (84) and a second flange (83), a plurality of transverse elements (64) having two opposite ends and extending, in the condition of use, in the first direction and being connected to the screening body (61), and a plurality of connecting devices (5) connecting, in the condition of use, said plurality of transverse elements (64) with a respective side rail (8, 9), each connecting device (5) including a connecting clip (51) having at least one rigid L-shaped tab (511, 512) and at least one resilient tab (513).