Noise Absorber Housing with Visual Lock Verification

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Solution Overview

Problem

Existing devices for absorbing electrical noise on lines often fail to ensure complete engagement of the locking mechanism, leading to reduced noise absorption performance, which is only noticed during use.

Innovation Solution

A locking device is designed to be fully enclosed within the housing, with a visual inspection window allowing for immediate verification of correct engagement, potentially using a camera for automatic confirmation, and featuring a snapping mechanism to prevent tool-based opening.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the locking device is arranged completely within the housing without protruding parts, then the device cannot become detached during installation or handling, but it becomes difficult to verify whether the locking device is fully engaged

Engineering Contradiction:
Improvelocking engagement reliabilityVSAvoidlocking state verification difficulty
Core Design Contradiction:
ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

An opening is provided in the housing wall that allows visual inspection of the locking device engagement state. This opening acts as an intermediary that enables observation of the locking mechanism without compromising the enclosed design, allowing verification that the locking projection is fully engaged with the locking recess while maintaining the reliability benefits of having no external protruding parts.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Difficulty of detecting and measuring

If the locking device has protruding parts that extend beyond the housing surface, then it can be easily verified during installation, but the locking device may become detached during installation or handling

Engineering Contradiction:
Improvelocking state verification easeVSAvoidlocking engagement stability
Core Design Contradiction:
Difficulty of detecting and measuringVSReliability

Solution Approach 1:

The opening in the housing wall serves as a controlled intermediary that permits visual verification of the locking state without requiring external protruding parts. This resolves the contradiction by providing verification capability through the opening while maintaining the stability benefits of an enclosed locking device design.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If a special tool is required to open the locking device, then the device cannot be accidentally opened, but the device complexity increases

Engineering Contradiction:
Improvelocking device protection against accidental openingVSAvoidlocking mechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The locking device is designed to be opened by manually pressing the pressing element, which directly actuates the locking projection to disengage from the locking recess. This self-service mechanism eliminates the need for external tools or complex release mechanisms, reducing device complexity while maintaining protection against accidental opening through the deliberate pressing action required.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP2630648B1Device for absorbing noise
Publication Date: 2018.07.18 WURTH ELEKTRONIK EISOS
  • EP2630648B1 patent drawingFigure 1~5
  • EP2630648B1 patent drawingFigure 6~11
  • EP2630648B1 patent drawingFigure 9

AI summary

A device for absorption of electrical noise on lines contains a housing which is formed from two half-shells, which are connected to one another with the aid of a film hinge and, in the area of their opposite edges, have a locking device, which locks the two half-shells. A ferrite element is held in each half-shell. An aperture or a window is formed in the wall of one half-shell, through which the locking device can be seen, which locking device acts per se in a depression within the wall. Through this aperture it is possible to check and to inspect whether two elements which form the locking device are correctly seated.