Lock Bolt Projections Prevent Metal Strip Manipulation
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Solution Overview
Problem
Existing lock designs are inadequate in preventing manipulation using thin metal strips, as they may not effectively stop the strip from advancing into the lock body, even with recesses on the bolt side surface.
Innovation Solution
The implementation of projections on both the bolt and lock body sides that interlock when the bolt is extended, preventing the metal strip from advancing further into the lock body by settling against each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a recess is formed on the side surface of the bolt to prevent metal strip penetration, then manipulation resistance is improved, but the protection is insufficient as the metal strip may not stop at the recess and can still advance deeper into the lock body
Solution Approach 1:
The anti-manipulation feature is divided into two separate projection arrangements: one on the bolt side surface and another on the lock body side surface. This segmentation ensures that even if one projection arrangement is bypassed, the other still provides protection, thereby resolving the insufficient protection issue while maintaining manipulation resistance.
Solution Approach 2:
The projection arrangements are positioned to preemptively block the metal strip before it can penetrate deep into the lock body. By placing projections at strategic locations on both the bolt and lock body, the system creates preliminary barriers that stop the metal strip in advance, preventing harmful penetration while maintaining reliability.
2Reliability
If projections are added on both the bolt and lock body sides to prevent metal strip advancement, then manipulation resistance is significantly improved, but the device complexity increases
Solution Approach 1:
The two projection arrangements (on the bolt and on the lock body) work together as a unified anti-manipulation system. By merging their functions, they create a comprehensive barrier against metal strip penetration while maintaining a relatively simple overall structure. The projections are integrated into existing bolt and lock body components rather than being separate added elements.
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention prevents the pushing of a manipulation means inside a lock body (1). In the embodiment according to the invention, there are projections (6, 8) both on the side of the bolt (3) and on the side of the lock body at the site of the bolt hole (4). The projections (6, 8) face towards each other and settle against each other at least then, when the bolt (3) is extended from the lock body (1).