Spring-Clamped Conductor Connection with Integrated Locking

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Solution Overview

Problem

Existing connection devices for electrical conductors are cumbersome, requiring multiple parts and complex handling, which hinders efficient and safe connection processes.

Innovation Solution

A compact connection device with a cage, force-generating mechanism, and pressure plate, featuring a compression or tension spring for easy clamping, and a locking mechanism for secure conductor insertion, allowing simple and quick actuation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a compact design with fewer parts is implemented, then device complexity is reduced and ease of operation is improved, but reliability may worsen due to fewer components for error tolerance

Engineering Contradiction:
Improvenumber of partsVSAvoidconnection safety
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent combines multiple functions into a single integrated connection device. The cage structure integrates the housing, conductor guidance, and clamping mechanisms into one unified component, eliminating the need for separate assembly steps and reducing the total number of parts while maintaining reliable electrical connection through the integrated force-generating device and pressure plate system

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If a locking mechanism is added to secure conductors, then reliability is improved, but device complexity and ease of operation worsen due to additional components

Engineering Contradiction:
Improveconductor securingVSAvoidlocking mechanism components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The connection device employs a self-locking mechanism where the force-generating device automatically engages with the pressure plate to secure the conductor. The detent mechanism provides automatic locking upon insertion, eliminating the need for separate manual locking operations. The system self-regulates the clamping force through the spring mechanism, ensuring reliable conductor securing without adding complex external locking components

Inventive Principle:
Principle #25Self-service

3Ease of operation

If an actuating mechanism is implemented for opening connection points, then ease of operation is improved, but device complexity increases due to additional mechanical components

Engineering Contradiction:
Improveconnection point actuationVSAvoidactuating mechanism parts
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The connection device utilizes a dynamic actuating mechanism where the cage can pivot between closed and open positions. The force-generating device works in conjunction with the pressure plate to provide controlled movement of the connection points. This dynamic system allows easy opening and closing of connection points through simple rotational motion of the cage, maintaining ease of operation while integrating the actuation function into the existing structural components

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

Facilitates easy and safe connection of electrical conductors with a reduced number of parts, ensuring quick and reliable attachment to busbars.

Implementation Method 1

the force-generating device incorporates a force storage element in the form of a compression spring and/or tension spring

Methodology Applied
Scientific EffectSpring: Spring

Implementation Method 2

the force-generating device incorporates a force storage element in the form of a compression spring and/or tension spring

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP4338238B1Connection device
Publication Date: 2026.03.11 WEIDMULLER INTERFACE GMBH & CO
  • EP4338238B1 patent drawingFigure 1~3
  • EP4338238B1 patent drawingFigure 4~6
  • EP4338238B1 patent drawingFigure 7~8

AI summary

A connection device (1) for electric conductors (16) comprises: a cage (2) with two connection points (I, II); a force generation device for clamping and contacting at least one electric conductor (I-1; II-1) at one of the connection points (I, II); and a pressure plate (4) to which force is applied by the force generation device. The force generation device is arranged in the interior of the cage (2), and the connection points (I, II) have a common stationary conductor (5).