Segmented Locking Plug Mechanism for Anti-Picking Security
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Solution Overview
Problem
Conventional lock-and-key style locking devices are vulnerable to unauthorized access through lock picking methods, and existing solutions to enhance security are often cumbersome, expensive, or impractical.
Innovation Solution
The locking device features a locking plug with multiple segments that move longitudinally, allowing tumblers to move vertically only when the plug cannot rotate, and vice versa, incorporating serrations to prevent simultaneous manipulation, thereby increasing the difficulty of picking the lock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional lock-and-key style locking devices are used, then ease of operation is maintained, but security against lock picking is insufficient
Solution Approach 1:
The locking plug is divided into multiple segments (first locking plug segment and second locking plug segment) that can move independently relative to each other. This segmentation allows the lock to prevent simultaneous manipulation of tumblers and rotation, thereby enhancing security without requiring a complete redesign of the entire locking mechanism.
Solution Approach 2:
The locking plug segments are designed to move dynamically - the first segment can move longitudinally within the lock body while the second segment remains relatively fixed. This dynamic movement creates conditional restrictions where tumblers can only move vertically when the segments are in specific positions, and rotation is only possible when segments are in other positions, preventing lock picking techniques that rely on simultaneous manipulation.
2Reliability
If conventional locking mechanisms are used, then device simplicity is maintained, but vulnerability to lock picking increases
Solution Approach 1:
By dividing the locking plug into multiple segments with independent movement capabilities, the lock creates a more complex operational sequence that prevents unauthorized manipulation while still allowing legitimate users to operate it with a proper key. The segmentation ensures that tumblers and rotation cannot be manipulated simultaneously, blocking lock picking techniques.
Solution Approach 2:
The lock changes the operational parameters by introducing conditional restrictions based on the longitudinal position of the locking plug segments. When segments are in certain positions, vertical movement of tumblers is restricted; when in other positions, rotation is restricted. This parameter-based control enhances security while maintaining operational simplicity for authorized users.
3Reliability
If locking mechanisms that prevent lock picking are designed, then security is improved, but manufacturing cost increases
Solution Approach 1:
The locking plug is segmented into multiple parts that can be manufactured separately and then assembled together. This approach allows for simplified individual component manufacturing while achieving enhanced security through the combination of segments. The first and second locking plug segments can be produced using standard manufacturing processes, reducing overall cost compared to creating a completely new complex locking mechanism.
Solution Approach 2:
The first locking plug segment is positioned within the second locking plug segment, creating a nested structure. This nesting allows both segments to cooperate within the existing lock body space without requiring significant additional manufacturing capacity. The segmented design enables modular assembly, which can reduce manufacturing complexity and cost compared to monolithic high-security locks.
Data Source
AI summary
An improved locking device comprising a lock body, a locking plug, and a plurality of tumblers, wherein the tumblers are restricted from moving with respect to the locking plug during the time frame that the locking plug is rotated with respect to the lock body.