Window Screening Locking Mechanism for Tool-Free Installation
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Solution Overview
Problem
Existing window screening arrangements require secure and stable installation without the use of additional fastening means, such as screws, to facilitate easy and flexible installation, especially for non-professionals.
Innovation Solution
The screening arrangement features at least two female locking means that cooperate successively with one male locking means, allowing engagement in multiple positions, including a temporary and terminal position, enabling secure mounting without tools, with recesses and inclined portions for smooth and stable engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple locking positions are provided to facilitate installation, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is segmented into multiple discrete locking positions along the guide rail, each capable of independently engaging with the male locking means. This segmentation allows the screening device to be temporarily positioned at different locations during installation while maintaining structural simplicity through standardized repeating elements
Solution Approach 2:
A female locking means with a recess is introduced as an intermediary element between the male locking means and the guide rail. This intermediary provides the temporary locking capability without requiring complex additional fastening mechanisms, simply by engaging the male locking means at different positions along the guide rail
2Ease of operation
If temporary retention is provided to facilitate installation, then ease of operation is improved, but reliability of permanent fixing deteriorates
Solution Approach 1:
The locking mechanism transitions from a static single-position design to a dynamic multi-position system. The female locking means can engage with the male locking means at various positions along the guide rail, allowing temporary positioning during installation while ensuring reliable permanent fixing when the terminal locking position is reached
Solution Approach 2:
The system provides tactile feedback through the engagement of the male locking means with different female locking means positions. When the terminal locking position is reached, the engagement provides a distinct mechanical confirmation that ensures reliable permanent fixing has been achieved
3Reliability
If additional fastening means are used to ensure secure mounting, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The need for separate external fastening means is extracted and eliminated by integrating the locking functionality directly into the guide rail and end piece assembly. The male and female locking means provide all necessary securing within the existing structure, removing the requirement for additional screws or fasteners
Solution Approach 2:
The mounting and locking functions are merged into a single integrated mechanism. The male locking means on the end piece and female locking means on the guide rail work together to provide both temporary retention during installation and reliable permanent fixing in the terminal position, eliminating the need for separate fastening operations
Data Source
AI summary
In the screening arrangement, a screening device is provided with end pieces adapted to be mounted on mounting brackets (6). Locking members are provided on the end pieces and the mounting brackets for providing engagement, between these components. The locking members include mutually cooperating female and male locking members, of which the mounting brackets (6) are provided with two female locking members (12, 14) to cooperate successively with one male locking member of the respective end piece, so that it is possible to provide engagement between each end piece and the respective mounting bracket in at least two positions including a first, temporary position and a second, terminal position on the mounting bracket, when the end pieces are moved with the screening device in the third direction from the point distant from the pane to the point proximate to the pane.