Lock Core with CAM Blocking for Unauthorized Access Prevention
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Solution Overview
Problem
Existing interchangeable lock cores lack sufficient security measures to prevent unauthorized unlocking or locking, necessitating improved validation mechanisms to enhance security.
Innovation Solution
A lock core system with a plug and shell configuration that includes a rocker and lock actuator assembly, utilizing a security rod and spring mechanism to ensure proper key engagement, allowing sequential movement between locked and unlocked positions through vector components along and transverse to the longitudinal axis, and incorporating a key design with a groove and shoulder to interact with the lock actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional interchangeable lock cores are used, then ease of operation is maintained, but security is insufficient to prevent unauthorized unlocking
Solution Approach 1:
The lock mechanism is divided into distinct functional segments: a plug assembly with pin tumblers for key validation, a separate rocker assembly for blocking control, and a shell providing structural support. This segmentation allows each component to perform its specific security function independently, enhancing overall security while maintaining manageable complexity through modular design
Solution Approach 2:
The rocker assembly acts as an intermediary blocking mechanism between the plug assembly and the external environment. It mediates the interaction by physically preventing rotation of the plug when in the blocked position, adding an additional layer of security validation without requiring direct exposure of the pin tumbler mechanism
2Reliability
If additional validation mechanisms are added to the lock core, then security is improved, but device complexity increases
Solution Approach 1:
The rocker assembly serves multiple functions: it blocks the plug from rotating when unauthorized, it can be actuated by a separate key or mechanism to unblock, and it provides a visual or tactile indicator of the lock state. This multi-functionality enhances security through additional validation while minimizing the increase in overall device complexity by consolidating multiple security features into a single component assembly
3Reliability
If a rocker blocking mechanism is added, then unauthorized access is prevented, but ease of operation may be reduced
Solution Approach 1:
The rocker assembly is pre-positioned in a blocked state by default, requiring proper key validation to change its state. The spring mechanism is pre-loaded to automatically return the rocker to its blocked position after unlocking, ensuring that the ease of operation is maintained for authorized users while security remains enhanced for unauthorized access attempts
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
Enhances security by ensuring only authorized keys can unlock the lock core, preventing unauthorized access and providing multiple locked states to maintain security even when the key is fully inserted.
Implementation Method 1
The spring supplies a biasing force to the block to bias the lock to the first locked position
Data Source
AI summary
A lock core includes a shell, a plug within and rotatable relative to the shell between a first position and a second position about a longitudinal axis of the plug, and a lock. The lock has a first locked position preventing rotation of the plug relative to the shell, an unlocked position allowing rotation of the plug relative to the shell and a second locked position different from the first locked position preventing rotation of the plug relative to the shell. The lock is moveable from the first locked position preventing rotation of the plug relative to the shell to the unlocked position with a first movement of the lock, the first movement having a vector component along the longitudinal axis of the plug and a vector component along an axis transverse to the longitudinal axis of the plug