Cylinder Lock Core Casing Detachment Mechanism
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Solution Overview
Problem
Conventional cylinder lock assemblies are non-detachable, making it difficult and costly to replace them when a key is missing or a tenant moves out, and lack a clear indication of the specific angular position for detachment.
Innovation Solution
A cylinder lock assembly with an exterior housing, core casing set, and core that includes a retaining pin with a stepped recess, allowing users to feel and hear a distinct engagement when rotating the core to the correct position for detachment, facilitating easy removal of the core casing and core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a detachable cylinder lock assembly is designed, then the ease of replacement is improved, but the device complexity increases due to additional components like retaining pins and mounting slots
Solution Approach 1:
The cylinder lock assembly is divided into separable components: the core casing set (containing the core, retaining pin, and tumblers) and the exterior housing. This segmentation allows the core casing set to be detached and replaced independently from the exterior housing, enabling easy replacement of the locking mechanism without replacing the entire assembly.
Solution Approach 2:
The core casing is nested within the exterior housing, and the core is nested within the core casing. The retaining pin extends through the core casing into the exterior housing, creating a nested structure where smaller components are contained within larger ones. This nested design allows for compact construction while maintaining detachability through the retaining pin mechanism.
2Ease of operation
If a clear indication mechanism is added to show the correct angular position, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The core casing is provided with visual indicators (such as colored markings or alignment features) that change position relative to the exterior housing as the core rotates. When the core reaches the correct angular position for detachment, the indicators align in a specific pattern or display a distinct color, providing clear visual feedback to the user without requiring additional mechanical indication mechanisms.
Solution Approach 2:
The alignment indicators on the core casing automatically provide indication of the correct position through their own structural design, without requiring external indication devices. The indicators are integral to the core casing structure itself, eliminating the need for separate indication mechanisms and reducing overall device complexity.
Data Source
AI summary
A cylinder lock assembly has an exterior housing, a core casing set and a core. The exterior housing has a through hole defined longitudinally through the exterior housing and a mounting hole defined in the exterior housing and communicating with the through hole. The core casing set is mounted slidably in the exterior housing and has a core casing and a retaining pin. The core casing has a central hole and a mounting aperture. The retaining pin is mounted slidably through the mounting aperture and has an inside end. The core is mounted in the central hole in the core casing and has keyhole having a stepped recess selectively engaging with the inside end of the retaining pin. A crash of the retaining pin and the stepped recess during the engagement notifies a user that the core and the core casing are released.