Flush Socket Lighting Module Spring Leg Locking Mechanism

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Solution Overview

Problem

Existing flush-mounted sockets lack a reliable mechanism to fix spreaders in a 'rest position' without additional holding means, such as rubber rings, during installation.

Innovation Solution

A flush-mounted socket with a separate lamp module for orientation lighting and/or operating voltage display, featuring a lamp housing with spring legs on non-adjacent side surfaces that pivotally attach to the device base, providing a locking mechanism for the spreaders.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional holding means (e.g., rubber rings) are used to fix spreaders in rest position, then reliability of spreader positioning is improved, but device complexity increases

Engineering Contradiction:
Improvereliability of spreader positioningVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the holding function with the lamp housing structure by integrating spring legs directly into the housing. This merging eliminates the need for separate holding means like rubber rings, thereby maintaining reliable spreader positioning while reducing device complexity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The spring legs are designed to automatically engage with the spreaders and maintain them in the rest position through their elastic properties. This self-service mechanism eliminates the need for additional components or complex assembly steps, achieving both reliability and simplicity.

Inventive Principle:
Principle #25Self-service

2Device complexity

If spring legs are integrated into the lamp housing, then additional holding means are eliminated, but manufacturing precision requirements increase

Engineering Contradiction:
Improvedevice complexityVSAvoidmanufacturing precision
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The spring legs are designed with specific geometric parameters and elastic properties that allow them to function as holding means while being integrated into the lamp housing. By carefully selecting these parameters, the patent achieves reliable spreader positioning through the housing structure itself, eliminating additional components.

Inventive Principle:
Principle #35Parameter changes

3Ease of operation

If spreaders are reliably locked in rest position without additional holding means, then ease of installation is improved, but the locking mechanism complexity increases

Engineering Contradiction:
Improveease of installationVSAvoidlocking mechanism complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The spring legs automatically perform the locking function through their elastic deformation and recovery. When the spreaders are inserted, the spring legs naturally engage with them and maintain the rest position, eliminating the need for complex manual locking mechanisms or additional holding components.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The spring legs provide a dynamic locking mechanism that adapts to the spreader position through elastic deformation. This dynamic behavior allows the housing structure itself to serve as the locking mechanism, simplifying the overall device while ensuring reliable spreader positioning during installation.

Inventive Principle:
Principle #15Dynamics

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 spreaders are reliably locked in a 'rest position' before installation, eliminating the need for additional holding means, ensuring secure positioning without external retention.

Implementation Method 1

two spring legs in pairs on the device base pivotally attached spreaders include arresting

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP1988615B1Built-in plug socket with lighting module
Publication Date: 2011.12.14 ABB AG(DE)
  • EP1988615B1 patent drawingFigure 1~2
  • EP1988615B1 patent drawingFigure 3
  • EP1988615B1 patent drawingFigure 4~5

AI summary

The flush-socket has a separate illuminant module (1) with an illuminant housing (3), which is installed at a base side of a device socket and includes two suspension units (4-6) at two non-adjacent sides. The suspension units include two pairs of spreaders that are fastened to the device socket, where each suspension unit includes a rest nose (9) on either side for locking the spreaders. Spreader-return springs hold the spreaders in a quiescent position in a direction of the device socket and between the suspension units.