Busbar Mounting Latch Geometry for Secure Front-Side Clamping

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Solution Overview

Problem

Existing mounting portions and adapters for electrical installation devices face challenges when the pivot point for the latching arm is unable to be placed behind the front surface of the busbar or cover, making it difficult to achieve a self-reinforcing clamping force.

Innovation Solution

A mounting portion with a latching arm that grasps an attachment point below the top edge of the busbar, defining a concave arc with a predefined radius, and a center point located behind the attachment point, combined with a spring mechanism to provide a clamping force, ensuring secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the pivot point of the latching arm is placed behind the front surface of the busbar, then a self-reinforcing clamping force is achieved, but the space behind the front surface is required which may be used or needed for other elements

Engineering Contradiction:
Improvesecuring mechanism reliabilityVSAvoidspace utilization
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent inverts the traditional pivot point location by placing it in front of the busbar front surface rather than behind it. This inversion allows the latching arm to function effectively without requiring space behind the busbar, while still achieving secure engagement through the alternative geometric arrangement of the arc-shaped arm and pivot point

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the spatial dimension by positioning the pivot point at a different location (in front of the busbar) and using an arc-shaped latching arm that engages the busbar from a different geometric perspective. This dimensional repositioning resolves the space conflict while maintaining the securing function

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

2Force

If the latching arm is articulated to grasp the busbar system, then additional clamping force is produced when lifting is attempted, but the pivot point location becomes constrained

Engineering Contradiction:
Improveclamping forceVSAvoidmounting portion structure
Core Design Contradiction:
ForceVSDevice complexity

Solution Approach 1:

The patent employs an arc-shaped latching arm with a specifically defined radius that corresponds to the curvature of the busbar. This curved geometry allows the arm to engage the busbar effectively and produce clamping force through rotational movement about the pivot point, achieving the desired force mechanism while simplifying the overall structure by eliminating the need for a complex pivot mechanism behind the busbar

Inventive Principle:
Principle #14Spheroidality (Curvature)

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 solution ensures a secure and reliable attachment of the mounting portion to the busbar system, even when the pivot point is not accessible from the front, by utilizing a latching arm and spring mechanism to enhance clamping force.

Implementation Method 1

a spring mechanism to provide a clamping force

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP4518054B1Mounting portion with a securing mechanism, adapter for an electrical installation device, and electrical installation device
Publication Date: 2026.01.28 WOHNER BESITZ GMBH
  • EP4518054B1 patent drawingFigure 1
  • EP4518054B1 patent drawingFigure 2a~2b
  • EP4518054B1 patent drawingFigure 3

AI summary

Mounting portion of an electrical installation device, the mounting portion being attachable to at least one current busbar, the mounting portion comprising: a hooking mechanism that is arranged on the mounting portion, and is adapted for being hooked onto the at least one busbar, a securing mechanism, comprising: a latching arm, the latching arm being arranged on the mounting portion, the latching arm being adapted to grasp an attachment point which attachment point is fixed with respect to the at least one busbar, the latching arm being further adapted to be in engagement with the attachment point, when the mounting portion is attached to the at least one busbar, the latching arm comprising an arm portion which defines a concave arc with a predefined radius, the arm portion being adapted to sit on a section of the mounting portion which defines a convex arc, the convex arc having the predefined radius, and a center point being located behind the attachment point when the mounting portion is attached to the at least one busbar.