Narrow Door-Lock Switching Mechanism for Reversible NO/NC Modes
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Solution Overview
Problem
Traditional door-lock driving devices are too wide for narrow-type door-frames of sectional doors, and existing designs require different mechanisms for normally-closed and normally-open door-locks, making it impossible to quickly switch between these types by replacing components.
Innovation Solution
A narrow-type door-lock driving device with electronically controlled switching status, utilizing a base with a status switching mechanism, electromagnetic traction mechanism, and lock core driving mechanism, allowing power transmission along a longitude direction, and enabling quick switching between normally-open and normally-closed modes using electromagnet or solenoid valve components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the door-lock driving device reduces its body width to fit the narrow-type door-frame, then it can be installed on the sectional door, but the space inside the device for mechanism becomes compact making it impossible to use traditional mechanisms
Solution Approach 1:
The patent reorganizes the internal mechanism layout by arranging components along the length direction (longitudinal axis) rather than spreading them out in the width direction. The drive shaft, gear mechanisms, and electromagnetic actuator are positioned sequentially along the length of the device, allowing the width to be reduced while maintaining sufficient internal space for mechanical operations.
Solution Approach 2:
The patent employs a nested arrangement where the gear mechanisms and drive components are compactly integrated within the reduced-width housing. The electromagnetic actuator is positioned to directly drive the gear mechanism without requiring additional external space, creating a space-efficient nested structure that fits within the narrow door-frame constraints.
2Reliability
If different internal components are designed for normally-closed and normally-open door-locks, then each mode can be optimized for its specific function, but it becomes impossible to quickly switch between modes by replacing components
Solution Approach 1:
The patent designs a universal door-lock driving device with a standardized internal structure that can function in both normally-closed and normally-open modes. The electromagnetic actuator and gear mechanism are configured to work with either mode depending on the control signal, eliminating the need for separate components for each mode and enabling quick switching between functions.
Solution Approach 2:
The patent incorporates a dynamic control mechanism where the electromagnetic actuator can be electronically controlled to provide different functional outcomes. The control system can dynamically adjust the actuator's operation to achieve either normally-closed or normally-open behavior, allowing the same physical device to adapt to different operational requirements without physical reconfiguration.
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 installation on narrow-type door-frames and allows seamless switching between normally-open and normally-closed modes without requiring component replacement, enhancing flexibility and compatibility with different access control systems.
Implementation Method 1
an electromagnetic traction mechanism, used for moving the lever to move the stopper
Implementation Method 2
it selectively uses one of the electromagnet component or the solenoid valve component to allow the narrow-type door-lock driving device with electronically controlled switching status to quickly switch to one of the normally-open door-lock or the normally-closed door-lock
Data Source
AI summary
A narrow-type door-lock driving device with electronically controlled switching status includes a base, a status switching mechanism, an electromagnetic traction mechanism, a handle and a lock core driving mechanism. The status switching mechanism is disposed at the base, including a lever and a stopper. The electromagnetic traction mechanism connects the lever, for dragging the lever to move the stopper from a stop position to an avoidance position after receiving a first control signal sent by a control device. The lock core driving mechanism connects the handle; when the stopper is in the stop position, it's blocked by the stopper and forbidden to be driven by the handle, a deadbolt kept snapping into a locking groove to maintain forbidden opening; when the stopper is in the avoidance position, it's driven by the handle to allow driving a lock core component, thereby allowing the deadbolt to snap out of the locking groove.