Multifunctional Door Lock with Limit Switch Motor Control
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Solution Overview
Problem
Conventional smart locks are bulky, lack handles for convenient operation, and have short service lives due to motor limitations, making them inconvenient and requiring frequent replacement.
Innovation Solution
A multifunctional door lock with a compact design featuring an outer and inner shell, an input module for various unlocking methods, a locking mechanism with a circuit board and motor, and limit switches to extend the lock's service life by controlling motor usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor is added to the locking mechanism to enable automatic locking and unlocking, then the convenience of operation is improved, but the service life of the motor is limited and the door lock requires frequent replacement
Solution Approach 1:
The patent applies dynamics by making the motor's operational state changeable through the limit member and limit switch mechanism. The motor dynamically transitions between working and non-working states based on the locking mechanism's position, allowing the motor to be protected from continuous operation while maintaining automatic locking/unlocking functionality.
Solution Approach 2:
The patent implements feedback through the limit switch that detects the position of the limit member and sends signals to control the motor's operation. This feedback mechanism ensures the motor stops at appropriate moments, preventing overuse and extending service life while maintaining automatic operation convenience.
2Ease of operation
If the door lock is designed to be compact and integrated, then the ease of operation is improved, but the structure becomes more complex without dedicated handles for manual operation
Solution Approach 1:
The patent applies universality by making the outer shell serve multiple functions: it acts as both the protective housing and the manual operation handle. This allows users to pull or push the outer shell for manual door operation while maintaining a compact integrated design, eliminating the need for separate dedicated handles.
Solution Approach 2:
The patent merges the outer shell with the handle function, combining what would traditionally be separate components into a single integrated structure. This reduces the number of parts while maintaining both automatic and manual operation capabilities, simplifying the overall device.
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 door lock provides secure, convenient operation with multiple unlocking methods, a compact size, and extended service life by controlling motor usage through limit switches, enhancing user experience and reducing frequent replacements.
Implementation Method 1
the locking mechanism includes a limit member and at least one motor
Implementation Method 2
the limit member is operable to contact the limit switch in the locked position and the unlocked position
Data Source
AI summary
A novel multifunctional door lock comprises a main body and a locking device, wherein the locking device is arranged inside the main body; the main body is provided with an input module which can generate an input instruction and transmit the input instruction to the locking device; the locking device comprises a circuit board and a locking mechanism, wherein the circuit board can generate a control signal according to the input instruction; the locking mechanism can respond to the input instructions or control signal and move between a locked position and an unlocked position; the circuit board is provided with a limit switch, and the locking mechanism comprises a limit member and a motor, wherein the limit member is operated to contact the limit switch in the locked position and the unlocked position, and when the limit member contacts the limit switch, the motor stops working.