Segmented Grounding Part for In-Vehicle EMC

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In-vehicle imaging devices face challenges in achieving high electromagnetic compatibility (EMC) due to interference from multiple electronic devices, such as GPS antennas, radio receivers, and mobile phones, which complicates reliable grounding of circuit boards and shielding cases.

Innovation Solution

A grounding part is designed with a circuit board and a grounding member having a reference potential, where the circuit board is grounded through a series of connecting components made of conductive materials, including a first connecting component, a second connecting component, and a third connecting component, ensuring reliable electrical connection and thermal conductivity to improve EMC.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a coating member is used to ground the circuit board, then the circuit board can be electrically grounded, but high EMC cannot be achieved in in-vehicle situations

Engineering Contradiction:

Improveelectrical grounding reliabilityVSAvoidelectromagnetic interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The grounding part is divided into multiple segments: a first connecting component with a first substrate connecting part and a first connecting part, and a second connecting component with a second substrate connecting part and a second connecting part. This segmentation allows each component to perform specific grounding functions, improving overall grounding reliability and EMC performance in in-vehicle environments.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The grounding part uses composite material construction where the first and second connecting components are made of conductive material, and the first and second substrate connecting parts are integrated with the circuit board. This composite structure ensures both electrical conductivity and mechanical stability, achieving high EMC in challenging in-vehicle conditions.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If a connecting member is used to connect the circuit board to the shielding case, then grounding can be achieved, but reliable electrical connection cannot be maintained in difficult environments

Engineering Contradiction:

Improveelectromagnetic shieldingVSAvoidelectrical connection reliability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The first and second connecting parts are designed with flexible conductive material that can dynamically adapt to thermal expansion, vibration, and mechanical stress in in-vehicle environments. This dynamic design maintains reliable electrical connection between the circuit board and shielding case under varying operating conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The connecting components are designed to accommodate parameter changes such as temperature variations and mechanical stress. The conductive material properties and structural design allow the connecting parts to maintain electrical connection reliability despite environmental parameter changes in in-vehicle situations.

Inventive Principle:

Principle #35Parameter changes

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 effectively enhances EMC by ensuring reliable electrical grounding and thermal connectivity, reducing electromagnetic interference and improving the operational stability of in-vehicle imaging devices.

Implementation Method 1

a first connecting component (14) electrically connected to each other, and a second connecting component (16) electrically connected to each other and to the grounding member (102, 103).

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

ensuring reliable electrical connection and thermal conductivity to improve EMC

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP2876873B1Grounding part, electronic device, imaging device, and grounding part production method

Publication Date: 2018.04.25 RICOH CO LTD

Figure 1~2
Figure 3
Figure 4

AI summary

A grounding part, an electronic device, an imaging device, and a method of producing a grounding part are provided. The grounding part includes a first connecting component (14) made of an electrically conductive material and connected to a circuit board (11, 12) having an electronic component (113, 123) thereon, and a second connecting component (16) made of an electrically conductive material and connected to the first connecting component (14) and a grounding member (102, 103). The first connecting component (14) includes a substrate connecting part (141, 142) connected to the circuit board (11, 12), and a second-connecting-component connecting part (141, 145) connected to the second connecting component (16), and the second connecting component (16) includes a first-connecting-component connecting part (161) connected to the first connecting component (14), and a grounding-part connecting part (162) connected to the grounding member (102, 103).