Protective rosette / fitting for electronic cylinders
The protective rosette addresses the vulnerability of electronic locking cylinders to mechanical attacks by distributing force away from the knob, preserving functionality and ease of installation.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-03-19
AI Technical Summary
Existing electronic locking cylinders are vulnerable to mechanical attacks, particularly breakage of the cylinder knob, which compromises their functionality.
A protective rosette is designed to fit snugly around the cylinder knob, dissipating mechanical forces onto the door surface and minimizing the point of attack, while maintaining the electronic cylinder's functionality.
The protective rosette effectively protects the cylinder knob from mechanical breakage, ensuring the electronic cylinder's integrity and ease of installation in both new and retrofitted settings.
Smart Images

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Abstract
Description
[0001] The invention relates to a protective rosette or fitting for electronic locking cylinders. Its purpose is to protect the cylinder knob against mechanical attacks such as breakage.
[0002] The protective rosette fits snugly around the cylinder knob and dissipates any forces acting upon it into the door surface. Its special design minimizes the point of attack on the knob. At the same time, the functionality of the electronic cylinder remains fully intact.
[0003] The installation is easy to assemble and suitable for both new buildings and retrofits. List of reference drawings Figure 1 Front view of round protective rosette Figure 2 Side view of round protective rosette Figure 3 Side view of oval protective rosette Figure 4 Front view of oval protective rosette Figure 5 Front view of round protective rosette with holes Figure 6 Front view of oval protective rosette with holes
Claims
[1] Protective rosette for electronic locking cylinders, characterized by that it fits snugly around the cylinder knob and prevents it from breaking off. [2] Fitting / rosette according to claim 1, characterized by that the rosette is made of a solid material. [3] Fitting / rosette according to claim 1 or 2, characterized by that the rosette directs forces into the door surface. [4] Fitting / rosette according to any one of the preceding claims, characterized by that the rosette is adaptable to different cylinder sizes.