Rosette Securing Device with Integrated Spring Reset
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Solution Overview
Problem
Existing door and window fittings with security devices are complex, requiring high installation effort and lacking a reset or hold-up mechanism for the handle, which complicates assembly and functionality.
Innovation Solution
A rosette device with integrated retaining means that secures the handle axially and circumferentially, utilizing a spring unit and slide elements to hold the handle in a ready-to-operate position and reset it after actuation, allowing for a simpler, modular fitting with low overall height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional security devices with separate retaining mechanisms are used, then the handle can be secured axially and circumferentially, but the structure becomes complex and assembly effort increases
Solution Approach 1:
The patent combines the retaining means directly into the security device, merging previously separate components. The security device now includes both the securing mechanism and the retaining means with spring units and slide elements, eliminating the need for separate retaining mechanisms and reducing overall structural complexity.
Solution Approach 2:
The security device is designed to perform multiple functions: it provides both the securing function (axial and circumferential restraint) and the retaining function (hold-up position and reset capability) through its integrated structure, making the device universal and reducing the total number of components needed.
2Reliability
If traditional fittings with multiple individual parts are used, then the handle can be secured, but the installation effort and assembly complexity increase
Solution Approach 1:
Multiple functional components are merged into the security device, including the retaining means with spring units and slide elements. This integration reduces the number of individual parts that need to be assembled and installed, significantly reducing installation effort and assembly complexity.
Solution Approach 2:
The patent employs a modular design where the security device with integrated retaining means can be installed as a unit, and the handle can be attached separately. This segmentation allows for easier manufacturing and assembly while maintaining reliable securing functionality.
3Device complexity
If traditional fittings without integrated reset mechanisms are used, then the structure can be simpler, but the handle lacks a reset or hold-up mechanism
Solution Approach 1:
The reset functionality is merged into the security device through the integrated retaining means. The spring units and slide elements work together to provide both the hold-up position and the reset capability, maintaining structural simplicity while enhancing operational functionality.
Solution Approach 2:
The spring units automatically return the slide elements to their original positions after actuation, providing a self-resetting mechanism. This self-service functionality ensures the handle returns to its hold-up position without requiring external intervention, improving ease of operation while keeping the structure relatively simple.
4Device complexity
If modular fittings with integrated retaining means are used, then assembly complexity is reduced, but the overall height of the fitting increases
Solution Approach 1:
The retaining means are nested within the security device structure. The spring units and slide elements are arranged compactly within the existing security device footprint, minimizing the increase in overall height while maintaining the modular design benefits.
Solution Approach 2:
The patent optimizes the spatial arrangement of the retaining means by utilizing the circumferential dimension and radial space within the security device rather than extending primarily in the axial direction. This dimensional optimization reduces the overall height increase while maintaining assembly simplicity.
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
The solution simplifies the structure of door and window fittings by integrating retaining mechanisms, reducing assembly complexity and achieving a low overall height while ensuring secure and functional handle operation.
Implementation Method 1
at least some of the means for securing yielding elastically during insertion and then having a restoring force against the handle being pulled out
Implementation Method 2
Securing can take place in a form-fitting, non-positive and/or frictional or material-fitting manner
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The safety mechanism for a window or door handle, especially at the rosette unit (2), has an integrated lifter (33) to hold the push unit in the raised position and return it to the raised position after it has been operated. Tensed springs (23) act on the components (12,34) of the lifter.