Door Hold-Open Device Removable Bezel Maintenance
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Solution Overview
Problem
Existing door locking arrangements face challenges in safe and efficient maintenance, particularly when servicing hazard detectors, as the interior of the locking assembly is exposed and prone to damage during maintenance procedures.
Innovation Solution
The locking arrangement features a removable bezel that allows access to the interior without removing the top and bottom covers, with the bezel being designed as a pivotable, extendable, or completely removable panel, ensuring the hazard detector and electrochemical energy store remain protected during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the housing is completely disassembled to access the hazard detector, then maintenance access is improved, but the risk of damage to internal mechanisms increases and protection is reduced
Solution Approach 1:
The housing is divided into modular components: a removable bezel (front cover) and fixed side covers. This segmentation allows the bezel to be removed for maintenance access while the side covers remain attached to protect internal mechanisms, resolving the contradiction between ease of maintenance and protection.
Solution Approach 2:
The bezel is extracted as a separate removable component from the housing assembly. This allows the bezel to be taken off for maintenance while the rest of the housing with internal mechanisms remains protected by the side covers, enabling access without full disassembly.
2Ease of repair
If the bezel is made completely removable, then maintenance simplicity is improved, but structural integrity and protection are reduced
Solution Approach 1:
The housing is segmented into a removable bezel and fixed side covers. The bezel can be completely removed for maintenance while the side covers remain attached to maintain structural integrity and protect internal mechanisms, resolving the contradiction between maintenance simplicity and structural strength.
3Ease of operation
If all covers are removed for maintenance, then access to components is improved, but the time required for maintenance increases
Solution Approach 1:
The housing is segmented into a removable bezel and fixed side covers. Only the bezel needs to be removed for maintenance access, while the side covers remain attached. This eliminates the need to remove all covers, significantly reducing maintenance time while still providing adequate access to the hazard detector.
Solution Approach 2:
The bezel is extracted as the only removable component needed for maintenance. This allows access to the hazard detector without removing the time-consuming side covers, reducing maintenance time while maintaining adequate access.
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 design simplifies and safeguards maintenance by reducing the risk of damage to the locking arrangement, allowing for easier access and replacement of components without exposing the internal mechanisms, thus enhancing operational safety and efficiency.
Implementation Method 1
an electrochemical energy store (3) for supplying at least a portion of the locking assembly (1) with electrical power
Data Source
Figure 1
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Figure 3
AI summary
The invention relates to a hold-open device (1) for a door, comprising a hazard detector (14) for sending a release signal and/or an electrochemical energy storage device (3) for supplying at least a part of the hold-open device (1) with electrical current, and a housing (8) for receiving the hazard detector (14) and/or the electrochemical energy storage device (3). According to the invention, the housing (8) has at least one aperture (9), an upper cover (81), and a lower cover (82), wherein the aperture (9) is designed to be removable from at least one of the covers (81, 82).