Flush Rosette Fitting with Push-Push Release Mechanism
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Solution Overview
Problem
Existing rosette fittings for doors and windows require visually unappealing wide joints or additional recesses for removal, necessitating tools and optically suboptimal lateral grub screws for detachment.
Innovation Solution
A 'push-push' mechanism is implemented, allowing the cover rosette to be easily fixed and released by finger pressure, enabling flush installation and removal without tools, and allowing the handle to be preassembled with the substructure part for simplified installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If projecting latching or clamping elements are used to attach the cover rosette to the substructure part, then the cover rosette can be securely fixed, but wide joints must be provided between the cover rosette and the door or window sash to allow tool intervention for removal
Solution Approach 1:
The fixing connection is segmented into two functional parts: latching elements (protrusions or hooks) that engage with corresponding recesses in the substructure part for secure attachment, and a flush mounting interface that allows the cover rosette to sit flush with the door or window sash surface. This segmentation enables both strong fixing and aesthetic appearance simultaneously.
2Ease of operation
If additional recesses are provided in the area of the central opening for the handle to pull the cover rosette out, then the cover rosette can be removed using a special tool, but the handle must be removed beforehand to make the recesses accessible
Solution Approach 1:
The release mechanism is extracted and integrated into the handle assembly itself. The handle contains a release element (such as a button or lever) that directly actuates the latching elements of the cover rosette, allowing the cover rosette to be removed without first removing the handle. This extraction of the release function from the mounting structure and integration into the handle simplifies the disassembly process.
3Adaptability or versatility
If a lateral grub screw is used to detachably fix the handle to the square bar, then the handle can be removed for access to recesses, but the lateral grub screw is optically not optimal
Solution Approach 1:
The fastening mechanism is nested within the handle assembly rather than being exposed on the exterior. The grub screw or other fastening element is positioned inside the handle body or concealed by the handle design, so that the handle maintains a clean, aesthetic appearance while still providing detachable functionality. The fastening mechanism is essentially hidden within the larger handle structure.
4Ease of operation
If the cover rosette is pressed against the substructure part with finger pressure, then assembly and disassembly can be carried out easily without tools, but the fixing connection must be designed to release with the same pressing action
Solution Approach 1:
The latching elements are designed with elastic or resilient properties that allow them to dynamically respond to pressing forces. When the cover rosette is pressed during assembly, the latching elements flex to allow engagement; when pressed during disassembly, they flex to release the engagement. This dynamic behavior enables the same simple pressing action to both secure and release the connection, while maintaining strong fixing during normal use.
Data Source
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AI summary
The invention relates to a rosette set (2) for a handle (16) for doors or windows, comprising a substructure part (6) that can be mounted in a recess in a door or window sash (4) and a cover rosette (8) that can be applied to the substructure part (6) and releasably fixed, the cover rosette (8) being arranged substantially flush with a visible surface of the door or window sash (4) surrounding the recess in the applied and fixed state, wherein the cover rosette (8) is formed from a flat section of material which, in the applied and fixed state, is arranged parallel to a plane of the door or window sash (4) and has at least one projecting fixing element (14) in a direction orthogonal to the plane (10) of the door or window sash (4), characterized in that at least one counter fixing element (15) is provided on the substructure part (6).and that when the cover rosette (8) is pressed onto the substructure part (6), the fixing element (14) of the cover rosette (8) engages with the counter-fixing element (15) on the substructure part (6) in a snapping, locking or otherwise interlocking fixing connection, and that this fixing connection is released again when the cover rosette (8) is pressed against the substructure part (6) again, so that the cover rosette (8) can be removed from the substructure part (6) or moved away along the lever (16).