Removable Holder DIN Rail Junction Box Assembly

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Solution Overview

Problem

In existing distribution boxes, valuable assembly space for cabling is often blocked by holding devices that secure the cover over mounting rails, making it difficult to access and wire devices efficiently.

Innovation Solution

A removable holder system where the holder can be easily detached from a base part, allowing for the creation of assembly space under the mounting rails, enabling lateral access for cabling by plugging the holder onto the end of a DIN or top-hat rail and removing it orthogonally to avoid interference with components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a holding device with a holder is used to secure the cover over mounting rails, then the cover is firmly held in place, but valuable assembly space for cabling is blocked and lateral access for wiring becomes difficult

Engineering Contradiction:

Improvecover fixationVSAvoidcabling access

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The holding device is divided into two separable parts: a base part that remains attached to the mounting rail and a holder that can be removed from the base part. This segmentation allows the holder to be taken away to create cabling space, while the base part remains to maintain cover support structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The holding device transitions from a static, permanently fixed structure to a dynamic, reconfigurable structure. The holder can be reversibly removed from the base part, allowing the assembly space to be dynamically adjusted for cabling operations while maintaining cover fixation when needed.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If the holder is permanently attached to the base part, then the cover holding structure is stable and simple, but assembly space is blocked and wiring complexity increases

Engineering Contradiction:

Improveholding device structureVSAvoidwiring process

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The holding device structure is segmented into a base part and a removable holder, allowing the structure to remain simple when assembled while providing access when the holder is removed for wiring operations.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If mounting space is used for lateral access under rails, then cabling becomes easier, but the holder must be removable from the base part

Engineering Contradiction:

Improvecabling easeVSAvoidholder attachment mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The holder attachment mechanism provides dynamic connectivity, allowing the holder to be easily attached to and removed from the base part. This reversible connection enables the mounting space to be accessed for lateral cabling while maintaining structural integrity when assembled.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3499660B1Assembly, comprising a first and a second mounting rails, a cover and a first and a second holder devices, and junction box

Publication Date: 2021.09.01 ABB (SCHWEIZ) AG

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AI summary

An arrangement comprising at least one rail (1) for receiving switches and/or devices (2), a cover (3) for at least partially covering the rail (1) and a holding device (4) for the cover (3), is characterized, with regard to the objective of providing an arrangement with a cover and rails in which switches and/or devices mounted on the rails can be supplied with cables as easily as possible, in that the holding device (4) is designed in two parts and has a base part (4a) and a holder (4b), wherein the holder (4b) is at least partially removable from the base part (4a) to create a mounting space (7).