Dome Knob Lock Mechanism for Hygienic Sealing
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Solution Overview
Problem
Existing switch cabinet lock designs are either expensive, complex, and difficult to clean, or they compromise on hygiene due to design flaws such as edges, gaps, and poor sealing.
Innovation Solution
A dome-like actuating element with rounded grip elements is rotatably mounted on a sealed key plate, coupled to the lock drive, featuring multiple sealing rings for a gapless, edgeless, and easy-to-clean interface, with a two-part lock housing and adjustable stops for optimal hygiene and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hand levers are held in a trough-like attachment on the outside of the cabinet door, then the lock can be held and released, but the design is expensive, very complicated and has major disadvantages for keeping it clean
Solution Approach 1:
The lock housing is divided into two parts (first and second lock housing) that can be separately assembled, allowing simplified manufacturing and assembly while maintaining the complete locking function
Solution Approach 2:
The actuating element is designed as a dome-like knob with rounded surfaces instead of trough-like attachments with edges and corners, eliminating hard-to-clean geometries while preserving the holding and releasing function
2Device complexity
If simple actuators are designed as plug-in squares rotatably mounted in plate-like doors, then the structure is simpler, but it is unfavorable for hygienic cleaning due to edges and gaps
Solution Approach 1:
The actuating element features a dome-like shape with rounded grip elements that eliminate edges and corners where dirt and bacteria could accumulate, making the surface easy to clean while maintaining rotational actuation capability
Solution Approach 2:
A sealing web with sealing rings creates a flexible seal between the actuating element and key plate, forming a gapless interface that prevents contamination while allowing rotational movement
3Ease of manufacture
If the actuating element is rotatably mounted in a bore in the cabinet door, then the installation is straightforward, but it creates gaps and edges that compromise hygiene
Solution Approach 1:
The sealing web extends from the actuating element and forms a flexible membrane that seals the interface between the knob and key plate, eliminating gaps created by traditional bore mounting while maintaining ease of installation
Solution Approach 2:
The combination of the actuating element, key plate, and sealing web creates a composite structure that integrates mounting and sealing functions, achieving both ease of installation and hygienic properties
Data Source
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AI summary
The cabinet has a cabinet body with a cabinet opening, which is closable by a cabinet door (10) hinged on a hinge side (10.7). An actuating unit (20) of a closure is swivelably supported in a sealed manner as a dome shaped knob with rounded gripping units on a front side of the cabinet door in a round coded shield (40) with a form fit passage. The coded shield is fitted on the front side of the cabinet door around a bore hole (10.9) in a sealed manner. The knob is coupled with a drive of the closure in the rear side of the cabinet door in the area of another borehole of the door.