Pass-through door compartment interlock mechanism
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Solution Overview
Problem
Existing pass-through compartments lack a mechanism to ensure that only one door can be opened at a time, which is crucial in environments like medical laboratories to prevent unauthorized access.
Innovation Solution
An interlock mechanism that engages a first locking pin to lock a first door when the second door is open and engages a second locking pin to lock the second door when the first door is open, using pivot arms and spring pins to prevent simultaneous opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no interlock mechanism is installed, then the pass-through compartment allows free operation of both doors, but security is compromised and unauthorized access can occur
Solution Approach 1:
The patent introduces an interlock mechanism as an intermediary system that mediates between the two doors. This mechanism includes locking pins, pivot arms, and strike plates that physically prevent both doors from being open simultaneously, thereby ensuring security without requiring complex electronic systems or constant monitoring
Solution Approach 2:
The interlock mechanism is designed to automatically engage and disengage based on the state of the doors. When one door is opened, the mechanism self-activates to lock the other door through the interaction of pivot arms and locking pins, eliminating the need for external control systems or manual intervention
2Reliability
If an interlock mechanism is installed to prevent simultaneous door opening, then security is enhanced, but the device complexity increases
Solution Approach 1:
The interlock mechanism is segmented into independent functional components: locking pins on each door, pivot arms connected to the compartment frame, and strike plates. Each component performs a specific function, and the modular design allows for easier installation, maintenance, and replacement without affecting the entire system
Solution Approach 2:
Instead of using a complex electronic control system that actively monitors and controls door states, the patent inverts the approach by using a passive mechanical system where the default state allows free operation and security is enforced through physical constraints when attempted to be bypassed
Data Source
AI summary
A locking assembly is operatively coupled to a first door and a second door of a pass-through housing. The locking assembly includes a first locking pin on the first door and a second locking pin on the second door. The locking assembly engages the first locking pin and locks the first door when the second door is opened, and engages the second locking pin and locks the second door when the first door is opened.