Lock Cylinder Rotor Shield for Drill-Resistant Keyway Protection
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Solution Overview
Problem
Existing lock cylinders are susceptible to tampering, particularly through the use of acid and/or tampering devices such as drills, and existing protective devices fail to adequately protect the key insertion channel, leaving it vulnerable to tampering devices such as drills, and existing protective devices fail to adequately protect the key insertion channel, leaving the key insertion channel exposed.
Innovation Solution
A protection device comprising a stator body and a rotor body with a mechanical locking mechanism that can be switched between locking and unlocking configurations, preventing tampering by allowing the rotor body to rotate between closed and open positions, and a mechanical locking device with pins and counter-pins to prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional defender is applied to protect the lock cylinder, then the cylinder body is protected against drilling, but the key insertion channel remains exposed and vulnerable to tampering
Solution Approach 1:
The rotor body is nested within the stator body, creating a protective structure where the rotor can rotate between open and closed positions. When closed, the rotor occludes the key insertion channel inlet section, providing protection while maintaining access capability when opened.
Solution Approach 2:
The rotor body is positioned in a closed state during installation, preemptively blocking the key insertion channel inlet section before any tampering attempt occurs. The mechanical locking device is pre-configured to maintain this protective closed position.
2Ease of operation
If the rotor body is made rotatable to allow key insertion, then access to the lock is enabled, but the key insertion channel becomes exposed to tampering devices
Solution Approach 1:
The rotor body is designed to be dynamically rotatable between two positions: open (allowing key insertion) and closed (protecting the channel). The mechanical locking device enables controlled transition between these states, providing both accessibility and protection as needed.
3Reliability
If a mechanical locking device with pins and counter-pins is implemented, then unauthorized rotation is prevented, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into multiple independent pin sets, each with corresponding counter-pins. This segmentation allows for modular implementation and provides multiple locking points around the rotor body, enhancing security while allowing for standardized manufacturing of individual components.
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
Protection device (1) of a lock cylinder (C) comprising a stator body (2) and a rotor body (3) inserted into the stator body (2) and rotatable about an axis of rotation (A) of the rotor body (3). The rotor body (3) is selectively rotatable, in use, between a closed position, wherein a locking wall (3a) of the rotor body (3) completely occludes an inlet section of an insertion slot "F" of the cylinder (C), and an open position, wherein an access window (3b) of the rotor body (3) is coaxially arranged to the inlet section of the insertion slot (F). The rotor body (3) further comprises a mechanical locking device (4) which may be switched between an unlocking configuration, wherein the rotor body (3) is rotatable between the closed position and open position and vice versa, and a locking configuration, wherein the rotor body (3) is locked at least in the closed position. The device (1) further comprises an actuating key (5) of the rotor body (3), which may be inserted into an access portion (6) of the mechanical locking device (4) opposite, in use, to the locking wall (3a), configured to switch the mechanical locking device (4) from the locking configuration to the unlocking configuration and vice versa.