Door Stop Unit Decoupling Mechanism for Noise Reduction
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Solution Overview
Problem
Existing door locking systems, particularly in fire protection areas, face challenges with noise during operation, reduced service life, and difficulty in opening doors due to the noise and mechanical stress caused by conventional locking units, which need improvement for smoother operation and increased reliability.
Innovation Solution
The introduction of a decoupling device actuated by a slider of a door closer, which decouples the holding device from the locking device, allowing for independent release or maintenance of the locking mechanism, reducing noise and mechanical stress, and enabling easier door opening by integrating a higher control level into the locking system, potentially through mechanical means for enhanced reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the holding device continuously locks the locking device in the locked position, then the door remains securely held open, but noise and mechanical stress occur during door opening operations
Solution Approach 1:
The decoupling device is actuated by the slider before the locking device engages, temporarily releasing the locking device from the holding device's control. This preliminary action prevents the locking device from being forced against the holding device during door opening, eliminating noise and mechanical stress while maintaining secure door holding when locked
2Stability of the object's composition
If the locking device is continuously engaged to hold the door open, then the door remains fixed in position, but the service life of the locking mechanism is reduced due to constant stress
Solution Approach 1:
The system dynamically switches between coupled and decoupled states based on door position. The decoupling device temporarily disengages the locking device from the holding device during door opening operations, reducing continuous stress on the locking mechanism while maintaining stable door holding when the door is in the desired open position
3Reliability
If the holding device maintains constant locking force, then the door stays securely open, but it becomes difficult to open the door when passage frequencies are high
Solution Approach 1:
The decoupling device acts as an intermediary between the slider and the locking device. When actuated by the slider during door opening, it temporarily releases the locking device from the holding device's locking force, allowing easy door opening. Once the door reaches the desired position, the locking device is重新engaged to maintain secure holding
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
This solution reduces noise, extends the service life of the locking unit, and simplifies the process of opening doors by allowing the locking mechanism to be relieved, ensuring the door can be held open smoothly and securely, even in high-traffic situations, while maintaining fail-safe operation during emergencies.
Implementation Method 1
The holding device has an electromagnetic unit with a coil and an armature
Data Source
AI summary
The invention relates to a locking unit for holding a door in an open position, comprising a locking device for keeping the door open and a holding device configured such that, in a first operating state, it locks the locking device in a locked position and, in a second operating state, releases the locking device. The invention further relates to a door closing system comprising a door, a door closer, and a locking unit, and to a method for operating such a locking unit.