Magnetic Lock Mechanism with Coded Projections
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Solution Overview
Problem
Mechanical key operable locks are vulnerable to manipulation and decoding by lock picking tools due to physical interaction between the key and locking elements, compromising security.
Innovation Solution
A magnetic key operable lock mechanism that uses a barrel with locking element cavities responsive to local magnetic fields, a locking bar with coded projections, and a code plate to ensure the locking bar can only rotate when locking elements are magnetically moved to coded positions, preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical interaction between key and locking elements is used, then ease of operation is improved, but security is worsened due to vulnerability to lock picking and manipulation
Solution Approach 1:
The patent replaces the traditional mechanical interaction between key and locking elements with magnetic interaction. The key contains magnets that magnetically attract locking elements (steel balls or discs) to move them into specific positions, eliminating direct mechanical contact and making the lock immune to traditional picking tools while maintaining ease of operation.
Solution Approach 2:
The patent changes the physical state and interaction mode from mechanical force to magnetic field interaction. By using magnets in the key to create magnetic fields that manipulate locking elements, the system transforms the operating parameter from mechanical push/pull forces to magnetic attraction, thereby enhancing security while preserving user-friendly operation.
2Reliability
If magnetic interaction is used instead of mechanical interaction, then security is improved by preventing manipulation, but device complexity is worsened due to additional magnetic components
Solution Approach 1:
The key serves multiple functions: it acts as both the operating tool and the source of magnetic fields. The magnets embedded in the key perform the dual role of providing the magnetic force needed to move locking elements and defining the unique key code pattern, simplifying the overall system despite the introduction of magnetic components.
Solution Approach 2:
The magnetic locking elements (steel balls or discs) are self-actuating components that automatically move into their correct positions when exposed to the magnetic field from the key. This self-service mechanism eliminates the need for complex actuation mechanisms, reducing overall device complexity while maintaining high security through magnetic interaction.
3Reliability
If multiple locking elements with multiple positions are used, then security is improved through high number of permutations, but device complexity is worsened due to more locking elements
Solution Approach 1:
The locking mechanism is divided into multiple independent locking elements (steel balls or discs), each capable of occupying different positions within its cavity. This segmentation allows each element to contribute independently to the overall security code, creating a multiplicative effect on the number of possible combinations while keeping each individual element simple and manageable.
Solution Approach 2:
The locking elements utilize vertical positioning within their cavities to encode information. Each cavity has multiple discrete positions (e.g., different heights or depths) that the locking element can occupy, adding a dimensional aspect to the coding system. This vertical dimension allows for multiple states per element, exponentially increasing security permutations without requiring additional elements.
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 magnetic key operable lock significantly enhances security by preventing mechanical manipulation and decoding, offering a high number of permutations and resistance to picking tools, while maintaining a compact design suitable for various applications.
Implementation Method 1
each locking element being movable in response to a respective local magnetic field applied by a magnetic key when positioned within the keyway
Data Source
AI summary
A magnetic lock has a barrel and keyway, the barrel when rotated unlocking the lock. Locking element cavities each contain a moveable locking element such as a ball, movable in response to a magnetic field applied by a magnetic key. A locking bar is movable between a locked position and an unlocked position. The locking bar has coded projections which extend into the respective locking element cavities when the locking bar moves from the locked position to the unlocked position. A code plate is shaped in registration with the coded projections. When the locking bar is in the locked position the code plate and the coded projections form a substantially uninterrupted surface. The locking elements prevent movement of the locking bar from the locked position to the unlocked position except when magnetically moved to a coded position.