Magnetic Smart-Lock Apparatus for Automated Deadbolt Control
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Solution Overview
Problem
Existing smart lock systems require physical installation and replacement of traditional deadbolts, lack interior automation for locking and unlocking, and rely on smartphones for functionality, leading to limitations and inconvenience, especially regarding battery consumption and lack of energy harvesting capabilities.
Innovation Solution
A portable, installation-free smart-lock apparatus that attaches to existing deadbolts using magnets, enabling keyless entry with modular authentication methods, automatic locking/unlocking, and energy harvesting through USB charging or solar power, allowing for smartphone-independent operation and enhanced accessibility for users with disabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional deadbolts are replaced with smart locks, then automated locking/unlocking functionality is achieved, but installation complexity and cost increase
Solution Approach 1:
The smart lock device is designed to fit over the existing deadbolt mechanism like a nested doll, with the exterior housing enveloping the turn-thumb and internal components interfacing with the deadbolt's key cylinder and cam mechanism. This nesting approach allows the smart lock to leverage the existing deadbolt structure rather than requiring complete replacement.
Solution Approach 2:
The smart lock is designed with universal compatibility to work with standard single-cylinder deadbolts found in most doors, regardless of the specific deadbolt brand or model. The exterior housing is sized to accommodate various turn-thumb dimensions, and the internal mechanism interfaces with universal deadbolt components, enabling one device to serve multiple existing lock types.
2Extent of automation
If smart locks are designed for complete deadbolt replacement, then automated functionality is achieved, but user convenience decreases due to loss of physical keys
Solution Approach 1:
The smart lock merges electronic authentication capabilities with the existing mechanical key cylinder, allowing both electronic keyless entry and traditional physical key operation to coexist. The motor mechanism is controlled by the microcontroller based on electronic authentication, while the key cylinder remains mechanically connected to the cam to enable physical key operation.
Solution Approach 2:
The system allows users to maintain their existing physical keys and continue using them for lock operation. The smart lock components work alongside the existing key cylinder rather than replacing it, enabling users to service their own locks with familiar keys while gaining electronic automation benefits.
3Device complexity
If smart locks use fixed authentication methods, then device simplicity is maintained, but adaptability decreases
Solution Approach 1:
The authentication system is designed to be dynamic and reconfigurable, allowing the microcontroller to support multiple authentication methods (RFID, keypad, biometric, mobile device) that can be enabled or disabled based on user preference and available components. The system can adapt its authentication approach rather than being fixed to a single method.
Solution Approach 2:
The authentication functionality is segmented into separate modules or interfaces, each handling a different authentication method. This modular approach allows the system to support multiple authentication types independently, enabling users to choose their preferred method while maintaining a unified control system through the microcontroller.
4Ease of manufacture
If non-rechargeable batteries are used in smart locks, then initial setup is simple, but long-term energy sustainability deteriorates
Solution Approach 1:
The system uses rechargeable batteries that can be recharged multiple times through USB or energy harvesting, recovering energy that would otherwise be discarded. The rechargeable battery replaces the disposable battery, allowing the same energy storage device to be used repeatedly after recharging rather than being discarded after single use.
Solution Approach 2:
The smart lock incorporates energy harvesting capabilities that allow it to recharge its battery autonomously by capturing environmental energy (light, motion, or electrical power). This self-service recharging reduces or eliminates the need for manual battery replacement while ensuring long-term energy sustainability.
5Ease of operation
If smart locks require smartphone connectivity, then remote access is enabled, but operational reliability decreases when smartphone is unavailable
Solution Approach 1:
The microcontroller serves as an intermediary between multiple authentication interfaces and the motor mechanism. It can receive authentication inputs from various sources (RFID reader, keypad, biometric sensor, mobile device) and execute locking/unlocking commands independently, allowing the system to operate through multiple pathways rather than relying solely on smartphone connectivity.
Solution Approach 2:
The smart lock is designed with universal compatibility across multiple authentication methods, enabling it to function through RFID cards, keypads, biometric sensors, or mobile devices. This multi-functionality ensures that if one authentication method (such as smartphone) is unavailable, other methods can be used to maintain system operation.
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 solution provides a scalable, convenient, and energy-efficient smart-lock system that operates without replacing existing deadbolts, offering automated locking/unlocking, emergency access, and energy sustainability, enhancing user experience and security while being compatible with various deadbolt mechanisms.
Implementation Method 1
A portable, installation-free smart-lock apparatus that attaches to existing deadbolts using magnets
Data Source
AI summary
An installation-free rechargeable access control system is disclosed which automates the action of locking and unlocking a single-cylinder deadbolt on a door. In various embodiments, the present teachings provide a portable electronic module that can enhance the usage of deadbolts in place, instead of replacing the deadbolt mechanism itself. In various embodiments, the access control system can authenticate users and rotate a deadbolt using one or more peripheral sensing sources and wireless protocols.