Electric Door Lock Motor-Driven Interlock Mechanism
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Solution Overview
Problem
Conventional mechanical door locks cannot be reliably locked or unlocked using wired or wireless control, and they may switch between locking and unlocking states when the power supply is interrupted.
Innovation Solution
A door lock mechanism that includes a latch, driven rings, operating devices, a motor, and a helical elastic element, allowing for wired or wireless control of the locking state through a motor-activated interlocking mechanism, ensuring reliable locking and unlocking while preventing unintended state changes due to power outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a solenoid switch is connected to the latch device to enable electric locking, then the door can be locked by wired or wireless control, but the door lock may change from locking state to unlocking state or vice versa when power supply is interrupted
Solution Approach 1:
The patent applies preliminary action by pre-configuring the latch mechanism with a spring-loaded return mechanism that automatically returns the latch to the locked position if power is lost. The solenoid is designed to maintain the locked state during power supply, while the spring ensures automatic return to safe locked state upon power interruption, preventing unauthorized access without requiring continuous power.
Solution Approach 2:
The patent converts the harmful effect of power interruption into a beneficial safety feature. Instead of allowing the door to unlock when power is lost (which would be a failure mode), the system is designed so that power loss automatically triggers the latch to return to the locked position. This transforms the power interruption event from a vulnerability into a safety mechanism that enhances security.
2Reliability
If a motor and interlocking mechanism are added to enable reliable electric locking, then the door lock becomes reliable, but the device complexity increases
Solution Approach 1:
The patent merges the motor-driven interlocking mechanism with the existing latch structure. The motor is integrated to drive the same shaft that controls the latch engagement, combining the electric actuation function with the mechanical locking function into a unified mechanism. This reduces overall complexity compared to having separate electric and mechanical locking systems.
Solution Approach 2:
The patent introduces an intermediary interlocking mechanism that mediates between the motor and the latch. This intermediary component translates the motor's rotational motion into the appropriate linear or rotational motion required for latch engagement, providing a flexible coupling that simplifies the overall design while maintaining reliable control.
3Manufacturing precision
If the first unit and second unit are made movable between different positions to control locking, then the locking control precision is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies dynamics by designing the first unit and second unit to be movable between different positions rather than fixed. These units can shift their locations to engage with different components of the latch mechanism, enabling precise control over the locking state. The dynamic positioning allows the same basic components to serve multiple functions at different operational states.
Solution Approach 2:
The patent segments the locking control mechanism into separate first and second units that can independently move and position themselves. This segmentation allows each unit to be manufactured and assembled separately, then combined to achieve the full locking control function, simplifying the overall manufacturing process while maintaining precision.
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 secure electric locking and unlocking, cooperation with control systems, and reduces manufacturing complexity and costs by allowing simple structure and assembly, while preventing motor damage from resistance and ensuring reliable operation.
Implementation Method 1
a helical elastic element non-rotatably mounted around the outer periphery of the shaft and in threading connection with the threaded section
Implementation Method 2
a helical elastic element non-rotatably mounted around the outer periphery of the shaft and in threading connection with the threaded section
Data Source
AI summary
A door lock includes a latch slideably received in a case and an unlocking mechanism mounted in the case and operatively connected to the latch for moving the latch between a latching position and an unlatching position. The unlocking mechanism includes an unlocking mechanism having a shaft for moving a locking member between a front position in which the unlocking mechanism is locked and a rear position in which the unlocking mechanism is not locked. The shaft can be driven by a motor through wired or wireless control to rotate in a forward direction or reverse direction for locking or unlocking purposes.