Electromechanical Door Lock Actuation with Manual Bypass
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Solution Overview
Problem
Existing electromechanical door lock systems are slow to actuate and require excessive manual force, especially during power failures, making them inconvenient for impatient users and difficult for elderly people and children to operate manually.
Innovation Solution
An electromechanical door lock actuation system with a manual handle that can operate the dead bolt independently of the motor, featuring a gearwheel system that allows for quick switching between motorized and manual operation, and includes a mechanism to disconnect the motor during manual operation, ensuring reduced force requirement and quick action, even in power failure scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a driver coupler freely movable inside a pocket between two shoulders is used to provide free motion for manual operation, then the handle can rotate over an angular range for operating the dead bolt, but the time between motor activation and engagement of shoulders with driver coupler takes several seconds which is unacceptable
Solution Approach 1:
The invention extracts the motor from the manual operation path by providing a direct mechanical connection between the handle and dead bolt that bypasses the motor. The driver coupler is designed with a direct drive mechanism where manual rotation of the handle directly rotates the driver coupler to move the dead bolt, eliminating the delay caused by motor engagement and shoulder movement.
Solution Approach 2:
The system is segmented into two independent operational paths: a motorized path for normal operation and a manual path for emergency or power failure situations. The driver coupler can operate independently of the motor through a direct mechanical linkage, allowing manual operation without waiting for motor engagement.
2Extent of automation
If the motor is connected to the handle mechanism for electromechanical actuation, then motorized operation can drive the dead bolt, but manual operation requires substantial force for backdriving the motor which is difficult for elderly people and children
Solution Approach 1:
The driver coupler serves as an intermediary mechanism that provides two distinct operational modes. In motorized mode, the motor drives the dead bolt through the driver coupler. In manual mode, the handle connects directly to the driver coupler through a mechanical linkage that bypasses the motor, eliminating the need to backdrive the motor and reducing the force required for manual operation.
Solution Approach 2:
The system dynamically switches between motorized and manual operation modes. The driver coupler is designed to accept drive torque from either the motor or the manual handle, with the mechanical linkage automatically engaging the appropriate drive source based on operational conditions, allowing easy manual operation when needed.
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
The system provides quicker actuation and reduced manual force requirements, enabling efficient operation without motor assistance during power failures, enhancing usability for all users.
Implementation Method 1
A motor is provided inside the casing for driving the connector-receiver
Implementation Method 2
The connector-receiver comprises a receiver-gearwheel such that rotation of the receiver-gearwheel in opposite directions causes rotation of the connector-receiver in opposite directions
Data Source
AI summary
A door lock actuation device configured for operating a door lock in a door blade, wherein the door lock includes a dead bolt driven by rotation of a connector is provided. The device includes a casing, inside which there is provided a motor for driving a rotational connector-receiver that receives and rotates the connector. The device also includes a rotational handle mechanically connected to the connector-receiver, for forcing rotation of the connector-receiver by manual rotation of the handle. The motor is selectively disconnectable from the connector-receiver for manual driving of the connector-receiver by the handle without backdriving the motor.