Motor-Driven Door Locking Device Actuation
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Solution Overview
Problem
Existing door arrangements with motor-driven drive units require increased operating forces when operating the actuating element independently of the motor-driven drive unit, especially in unfavorable conditions, and this can be exacerbated by the use of multiple locking elements which increase the necessary operating force.
Innovation Solution
A sensor device is provided for contactless detection of the traction rod or driving rod movement, allowing the motor-driven drive unit to be activated based on detected movement, thereby reducing the operating forces required for changing the locking state and enabling the motor-driven drive to operate independently of the actuating element, especially for unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuating element is operated independently of the motor-driven drive unit, then the locking device can be actuated mechanically, but increased operating forces are required especially in unfavorable conditions
Solution Approach 1:
The patent replaces the purely mechanical actuation system with a hybrid system that incorporates a motor-driven drive unit. The motor-driven drive unit takes over the mechanically demanding task of moving the traction rod, substituting mechanical force with electrical drive. This resolves the contradiction by eliminating the need for high manual operating forces while maintaining mechanical actuation capability through the motor system.
Solution Approach 2:
The sensor device acts as an intermediary between the actuating element and the motor-driven drive unit. It detects the actuation state and triggers the motor-driven drive unit to assist or complete the actuation process. This intermediary mechanism enables the system to automatically compensate for high operating forces by activating the motor-driven assistance when needed.
2Reliability
If multiple locking elements are used to enhance security, then the locking reliability improves, but the operating forces required to actuate all locking elements increase
Solution Approach 1:
The motor-driven drive unit replaces manual mechanical actuation with an electrically powered system capable of generating sufficient force to move the traction rod and actuate multiple locking elements simultaneously. This substitution enables high reliability through multiple locking elements while maintaining ease of operation through electric drive assistance.
Solution Approach 2:
The system transitions from static manual actuation to dynamic motor-driven actuation. The motor-driven drive unit can adapt its output force and speed to match the requirements of actuating multiple locking elements, providing the necessary force when needed while requiring minimal user input. This dynamic capability resolves the contradiction between reliability and ease of operation.
3Ease of operation
If a sensor device is added for contactless detection of traction rod movement, then the motor-driven drive unit can be activated automatically, but the device complexity increases
Solution Approach 1:
The sensor device enables the system to self-monitor its own state by detecting the position or movement of the traction rod. This self-service capability automatically triggers the motor-driven drive unit when actuation is detected or needed, eliminating the need for separate control mechanisms. The system essentially monitors and controls itself, resolving the contradiction between automatic activation and device complexity.
Solution Approach 2:
The sensor device provides feedback about the traction rod's position or movement state to the control system. This feedback loop enables automatic activation of the motor-driven drive unit based on actual system conditions rather than requiring separate control inputs. The feedback mechanism simplifies the overall control architecture while enabling automatic operation.
Data Source
AI summary
A door arrangement includes a door leaf movable relative to a frame. A locking device in a locked state locks the door leaf to the frame by at least one locking element and in an unlocked state releases the door leaf relative to the frame. An actuating element selects the state of the locking device. To transmit a movement of the actuating element, the locking device has a connecting bar which is arranged displaceably on the door leaf, wherein a motor-operated drive unit for driving the connecting bar is provided. A sensor device for the contactless detection of a movement of the connecting bar is provided and the motor-operated drive unit can be activated in accordance with a movement of the connecting bar detected by the sensor device.