Lock Cylinder Anti-Drill Blocking Pin Mechanism
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Solution Overview
Problem
Conventional lock cylinder systems are vulnerable to drilling attacks, as they fail to effectively prevent the rotation of the lock bit during such attempts, despite the use of anti-drill systems with hard metal pins.
Innovation Solution
A lock cylinder system featuring a mechanically and/or electronically coded key or knob spindle with an axially displaceable drilling protection sleeve that engages with a blocking pin to prevent rotation of the lock bit, combined with anti-drill blocking pins that block the movement of cam and housing pins when a drilling force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hard metal pins are inserted into the cylinder housing and cylinder core for anti-drill protection, then resistance to drilling attacks is improved, but the lock bit can still rotate during drilling attempts
Solution Approach 1:
The blocking pin is designed to be axially displaceable, transitioning from a retracted position during normal operation to an extended position that blocks the lock bit during drilling attacks. This dynamic mechanism allows the system to adapt its protective function based on the detected threat level.
Solution Approach 2:
The blocking pin is pre-positioned to automatically engage and block the lock bit's rotation path when drilling force is applied. The system prepares the countermeasure in advance, so that when the drilling attack occurs, the blocking pin is already in position to prevent the harmful rotation immediately.
2Reliability
If an axially displaceable blocking pin is added to prevent lock bit rotation, then security against manipulation is improved, but device complexity increases
Solution Approach 1:
The blocking pin mechanism is integrated into the existing anti-drill protection structure, combining multiple protective functions (hard metal pins, blocking pin, and axial displacement mechanism) into a unified system. This merging approach adds functionality while minimizing the increase in overall device complexity.
Solution Approach 2:
The blocking pin serves multiple functions: it acts as a structural support element during normal operation, a blocking element during drilling attacks, and potentially a sensing element that detects the drilling force through its axial displacement. This multi-functionality reduces the need for separate dedicated components.
3Reliability
If the blocking pin is positioned to engage the lock bit, then prevention of rotation is improved, but normal operation may be interfered with
Solution Approach 1:
The blocking pin is designed with axial displacement capability, allowing it to be dynamically positioned in a retracted state during normal lock operation to avoid interfering with the lock bit, and automatically displaced to a blocking state when drilling force is applied. This dynamic positioning ensures both normal operation and protective function are achieved.
Solution Approach 2:
The blocking pin is pre-configured in a retracted position that allows normal lock bit rotation and operation. The blocking function is prepared in advance but only activated when the specific condition of drilling force is detected, ensuring that normal operations proceed without interference while protection is ready when needed.
Data Source
Figure 1~6
Figure 7~9b
Figure 10~11
AI summary
The invention relates to a locking cylinder system comprising a cylinder housing (1) with a cylinder core (8) rotatably mounted therein, which can be coupled to a locking bolt (3) or an output system via a mechanically and/or electronically coded key or a knob spindle that can be inserted into a keyway, and an anti-drilling protection (4) provided in the cylinder housing in the area of its outer end face. In addition to the anti-drilling protection (4), at least one blocking element (2, 7, 10, 17) is provided in the cylinder housing (1) and/or in the cylinder core (8), which is axially displaceable by a mechanical force acting on the anti-drilling protection and prevents the rotation of the locking bolt or an adapter arranged between the cylinder core and the output system.