Interlock Unit Segmentation for Analyzer Maintainability

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Solution Overview

Problem

Existing automated analyzers lack maintainability, as the interlock mechanism is difficult to access and repair when it is broken, leading to delays and challenges in maintenance.

Innovation Solution

The interlock unit is designed with a hollow case and an action member that can be easily accessed, featuring an electromagnetic drive mechanism and drive connecting means to facilitate the opening and closing of the safety cover, thereby improving maintainability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the lock mechanism is integrated into the closed safety cover structure, then the safety and locking function is improved, but the maintainability and accessibility for repair deteriorates

Engineering Contradiction:
Improvelocking functionVSAvoidaccessibility for maintenance
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The interlock unit is segmented from the main body and positioned in a detachable configuration within the safety cover assembly. This allows the interlock unit to be independently accessed, removed, and repaired without requiring disassembly of the entire safety cover or main apparatus structure, thereby resolving the contradiction between integrated locking function and maintainability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The interlock unit is positioned in a lower portion of the safety cover assembly, away from the upper cover surface where the lock mechanism operates. This spatial repositioning in a different dimension allows maintenance personnel to access the interlock unit from below or the side without interfering with the cover opening/closing operation, thus maintaining both locking reliability and ease of repair.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Device complexity

If the interlock unit is positioned in a confined space within the safety cover, then the compactness and safety are improved, but the ease of operation for maintenance deteriorates

Engineering Contradiction:
Improvecompact structureVSAvoidease of maintenance operation
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The interlock unit is designed as a separate, modular component that can be independently accessed through a dedicated access path or opening in the safety cover assembly. This segmentation allows maintenance personnel to reach the interlock unit without having to disassemble the entire compact structure, thus maintaining compactness while improving ease of maintenance operation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

An access mechanism or intermediate pathway is provided that allows maintenance personnel to reach the interlock unit without directly interfering with the main compact structure. This intermediary access path resolves the contradiction by enabling maintenance operation while preserving the overall compact design.

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The improved design allows for easier access and repair of the interlock unit, enhancing maintainability and reducing downtime during maintenance operations.

Implementation Method 1

electromagnetic drive means provided below the action member to drive the action member

Methodology Applied
Scientific EffectElectromagnetic drive: Electromagnet

Data Source

PatentUS12210025B2Interlock unit and automated analyzer equipped with same
Publication Date: 2025.01.28 HITACHI HIGH TECH CORP
  • US12210025B2 patent drawing
  • US12210025B2 patent drawing
  • US12210025B2 patent drawing

AI summary

An interlock unit for preventing rotation from a closed position of a cover to an open position thereof, includes: a hollow case having a rectangular parallelepiped shape disposed at a position adjacent to an inner side surface of a casing, below an end part opposite to a support shaft at the closed position of the cover; an action member that is provided on an upper surface of the case, supported to be movable between a non-operating position and an operating position, and engaged with a protruding part provided on the cover at the operating position to inhibit the cover from rotating toward the open position; electromagnetic drive means provided below the action member to drive the action member; and drive connecting means for driving the action member by connecting the action member and the electromagnetic drive means and transmitting an operation of the electromagnetic drive means to the action member.