Lock Cylinder Escutcheon Coupling for Violent-Force Protection
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Solution Overview
Problem
Existing lock assemblies lack sophisticated safety features to prevent unauthorized access and protect against violent force attempts, leading to potential damage and unauthorized opening.
Innovation Solution
A lock arrangement with a lock cylinder and escutcheon design featuring a flange and projections that allow for secure coupling and uncoupling, preventing rotational movement when excessive force is applied, and incorporating weakening grooves to absorb impact, thereby protecting internal components from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the escutcheon is rigidly fixed to the lock cylinder, then rotational stability is improved, but vulnerability to violent force increases
Solution Approach 1:
The coupling between escutcheon and lock cylinder is made dynamic rather than static. The protrusion can be positioned in groove engagement (rigid coupling for stability) or disengaged (flexible coupling for impact absorption), allowing the system to adapt its mechanical properties based on operational needs versus impact resistance needs.
Solution Approach 2:
The groove and protrusion design provides a predetermined failure mode where the protrusion can disengage from the groove under excessive force, preventing force transmission to the lock cylinder. This cushioning mechanism is built into the coupling design before any violent force is applied.
2Strength
If the lock cylinder is securely coupled with the lock case, then anti-tamper strength is improved, but adaptability for installation varies
Solution Approach 1:
The lock assembly is segmented into distinct components (lock case, lock cylinder, escutcheon) with standardized coupling interfaces. The external thread and flange design creates modular segments that can be assembled and disassembled independently, providing both secure coupling when assembled and flexibility during installation/removal.
3Strength
If the flange compresses the escutcheon tightly, then coupling strength is improved, but ease of installation decreases
Solution Approach 1:
The compression between flange and escutcheon is dynamic rather than permanently fixed. The protrusion-groove mechanism allows the escutcheon to be compressed into position during installation (providing coupling strength) while still permitting removal and reinstallation (providing ease of installation).
Data Source
AI summary
According to a first aspect of the invention, there is provided a lock arrangement comprising a lock cylinder having a housing with an external thread to couple the lock cylinder with a lock case, wherein the housing further comprises a flange and at least one groove extending in a longitudinal direction of the lock cylinder. The lock cylinder further comprises an escutcheon having a through hole configured to receive the lock cylinder such that the flange compresses the escutcheon against a counter surface, wherein the through hole comprise at least one projection extending towards the lock cylinder, wherein the escutcheon, when assembled with the lock cylinder, comprises a coupled state in which the projection is in the groove to prevent rotational movement of the escutcheon in relation to the lock cylinder around the longitudinal direction of the lock cylinder, and an uncoupled state in which the projection is at least partly out of the groove to enable rotational movement of the escutcheon in relation to the lock cylinder.