Integrated Door Operator for Safe Manual-Electric Mode Switching
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Solution Overview
Problem
Conventional door operating systems require additional components for manual operation during emergencies, leading to potential injuries or system damage when switching back to electric operation.
Innovation Solution
A door operator with an integrated brake unit and manual chain unit that generates rotational inertia, allowing seamless transition between manual and electric modes without additional setup, using an electromagnetic brake to provide brake force during manual operation and release it during electric operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional components are combined with the door operator for manual operation during emergencies, then manual operation capability is achieved, but the risk of operator injury or system damage increases when switching back to electric operation
Solution Approach 1:
The patent merges the manual operation mechanism directly into the door operator structure by integrating the manual chain unit with the drive unit and brake unit. This integration eliminates the need for separate additional components and ensures that the manual operation mechanism is inherently designed to work safely with the electric operation system, thereby maintaining reliability during mode switching while providing emergency manual operation capability.
Solution Approach 2:
The patent employs a dynamic brake unit that can automatically adjust its state based on the operation mode. During manual operation, the brake unit engages to provide brake force on the drive unit, preventing unintended movement. When switching to electric operation, the brake unit automatically releases, allowing the drive unit to operate normally. This dynamic adjustment eliminates safety risks associated with manual-electric mode switching.
2Productivity
If the door operator is switched to electric operation without removing additional manual operation components, then electric operation is restored, but injury to operator or damage to system may occur
Solution Approach 1:
The patent incorporates a rotation-detecting unit that preliminarily detects whether the output unit is rotating during mode switching. Before allowing electric operation to commence, the system checks the rotational state and prevents electric operation if manual operation is still active. This preliminary detection and prevention mechanism eliminates the risk of injury or damage before it can occur, while still allowing rapid switching to electric operation when safe.
Solution Approach 2:
The rotation-detecting unit provides continuous feedback on the operational state to the control system. This feedback mechanism allows the system to automatically adjust its behavior based on real-time conditions, preventing harmful interactions between manual and electric operation modes. The feedback ensures safe mode switching while maintaining high operational efficiency.
3Ease of operation
If manual operation components are integrated into the door operator, then immediate manual operation is possible during emergencies, but the device complexity increases
Solution Approach 1:
The patent designs the integrated manual chain unit to serve multiple functions: it provides manual operation capability during emergencies, acts as a mechanical coupling during normal operation, and works in conjunction with the brake unit to control movement in both manual and electric modes. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining immediate manual operation capability.
Solution Approach 2:
The brake unit serves as an intermediary mechanism that mediates between the manual chain unit and the drive unit. It provides brake force during manual operation to control the transmission of rotational inertia, and releases during electric operation to allow normal drive operation. This intermediary function simplifies the overall system architecture by using a single component to manage the interaction between manual and electric operation mechanisms.
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
Enables immediate manual operation during emergencies and direct switch back to electric mode without additional steps, preventing operator injury and system damage, enhancing operational efficiency.
Implementation Method 1
the brake unit is an electromagnetic brake unit. During the manual operation mode, the electromagnet of the brake unit is under power outage or is not powered so that the magnetic disc abuts the brake disc and the first brake lining, thereby providing a first brake force
Implementation Method 2
the manual chain unit is configured to generate rotational inertia, and the rotational inertia is transferred to the output unit via the brake unit, the drive unit and the transmission unit
Data Source
AI summary
A door operator capable of manual operations includes an output unit, a drive unit, a transmission unit, a brake unit, and a manual chain unit. The drive unit is disposed between the transmission unit and the brake unit. The output unit is disposed on a first side of the drive unit, the transmission unit and the brake unit. The manual chain unit is disposed on a second side of the drive unit, the transmission unit, and the brake unit that is opposite to the first side. During a manual operation mode, the brake unit provides a brake force on the drive unit and the manual chain unit is configured to generate rotational inertia, and the rotational inertia is transferred to the output unit via the brake unit, the drive unit and the transmission unit.