Lever Cylinder Sensor Integration for Door Locking

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Solution Overview

Problem

Existing lever cylinders for locking doors or covers lack a simple and compact design, are difficult to retrofit, and have limited control over electrical circuits.

Innovation Solution

A lever cylinder with a locking cylinder and lever, where the locking cylinder includes a sensor device to detect the rotation of the cylinder core, allowing for easy integration with electrical circuits and retrofitting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a lever cylinder is designed with integrated sensor device and electrical circuit control, then the control functionality is improved, but the device complexity increases

Engineering Contradiction:
Improvecontrol functionalityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the mechanical lever cylinder with an integrated sensor device and electrical circuit control system. The sensor device is mounted on the cylinder housing and detects the rotational position of the cylinder core, merging mechanical locking functionality with electronic detection and control capabilities into a single unified system.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The lever cylinder is designed to perform multiple functions: mechanical locking through the lever, rotational detection through the sensor device, and electrical circuit control. This multi-functional design allows the same device to provide both physical security and electronic monitoring/control without requiring separate systems.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of manufacture

If a lever cylinder is designed for easy retrofitting, then the ease of manufacture is improved, but the device complexity may increase

Engineering Contradiction:
Improveease of retrofittingVSAvoiddevice complexity
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The lever cylinder is designed as a modular system with distinct components: the cylinder housing, the cylinder core, the lever, and the sensor device. This segmentation allows each component to be manufactured independently and assembled during retrofitting, simplifying the installation process while maintaining functional integration.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The sensor device is pre-configured to detect the rotational positions of the cylinder core, and the electrical circuit is pre-wired with the appropriate switching elements. This preliminary preparation of components facilitates easier retrofitting, as the sensor and circuit are ready for integration without requiring complex on-site configuration.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP4571021A1Lever cylinder, locking device, system and method
Publication Date: 2025.06.18 DOM SICHERHEITSTECHN
  • EP4571021A1 patent drawingFigure 1~2
  • EP4571021A1 patent drawingFigure 3~5
  • EP4571021A1 patent drawingFigure 6

AI summary

The present invention relates to a lever cylinder (10) for locking a door (94) or cover, wherein the lever cylinder (10) has a locking cylinder (12) and a lever (14), wherein the locking cylinder (12) has a cylinder housing (16) and a cylinder core (18), wherein the cylinder core (18) is rotatable relative to the cylinder housing (16) about a rotational axis (20) between a first rotational position (22) and a second rotational position (24), wherein the lever (14) is connected to the cylinder core (18) in a rotationally fixed manner about the rotational axis (20), wherein the locking cylinder (12) further has a sensor device (56), wherein the sensor device (56) is configured to detect a rotation of the cylinder core (18) and/or a rotational position of the cylinder core (18). Furthermore, the present invention relates to a locking device (70). Furthermore, the present invention relates to a system (80).Furthermore, the present invention relates to a method (100) for closing and/or opening a door (94) or cover by means of a lever cylinder (10).