Shielded Cable Connecting Structure for Reliable Grounding

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Solution Overview

Problem

The existing shielded cable connecting structures face difficulties in efficiently connecting braided wires due to the complexity of twisting operations, leading to loose wires and reduced capacity, which compromises the reliability of the grounding path and operational efficiency.

Innovation Solution

A shielded cable connecting structure that uses a connecting member with press-clamping and press-contacting portions to securely connect the braided wire to an electric wire without twisting, ensuring the braided wire remains grounded and covered, while allowing for efficient insertion and connection of the shielded cable and electric wire in the same direction, utilizing insertion guides and notches to prevent incomplete insertion and relative displacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the braided wires are gathered together through twisting operation, then the connection between shielded cables is achieved, but the braided wires become loose and the number of fine wires decreases, reducing the capacity and reliability of the grounding path

Engineering Contradiction:

Improveconnection processVSAvoidgrounding path reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

A connecting member with a pressing portion is introduced as an intermediary tool to press and secure the braided wires without manual twisting. This mediator device applies uniform pressure to maintain the integrity of fine wires while achieving reliable connection, eliminating the need for skill-dependent twisting operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The manual twisting operation is replaced by a mechanical pressing system. The connecting member with the pressing portion applies controlled mechanical force to secure the braided wires, substituting the complex manual twisting mechanism with a simpler, more reliable pressing action that maintains wire integrity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If the braided wires are gathered together through twisting operation, then the shielded cables are connected, but the operation becomes difficult and productivity cannot be enhanced through automation

Engineering Contradiction:

Improveproduction efficiencyVSAvoidtwisting operation difficulty

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The difficult manual twisting operation is replaced by a mechanical pressing system using the connecting member. This substitution enables automated production by replacing skill-dependent manual dexterity with a programmable pressing mechanism, significantly enhancing productivity while simplifying the operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The operation parameters are changed from manual twisting (requiring skill and time) to automated pressing (controllable by force and time parameters). This parameter transformation enables automation by defining the connection process in terms of measurable and controllable physical quantities rather than manual skill.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If the braided wires are gathered together, then the shielded cables are connected, but the areas of non-shielded portions increase, reducing the reliability against disturbance

Engineering Contradiction:

Improvecable connectionVSAvoiddisturbance susceptibility

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The pressing portion of the connecting member acts as an intermediary that secures the braided wires while maintaining their shielding coverage. It applies pressure to ensure electrical contact without exposing the conductor, thus maintaining disturbance protection while achieving reliable connection.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connecting member is designed to maintain the braided wire coverage over the conductor throughout the connection process. By ensuring the braided wire remains in place during pressing, the design provides beforehand protection against disturbance, preventing exposure of the conductor to harmful electromagnetic interference.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Productivity

If manual twisting operation is used to connect braided wires, then connection is achieved, but the number of operations increases and operational efficiency is poor

Engineering Contradiction:

Improveoperational efficiencyVSAvoidconnection process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The connecting member integrates multiple functions into a single device: it holds the shielded cable, provides the pressing portion for securing braided wires, and ensures electrical contact. This merging of functions reduces the number of separate operations and tools needed, thereby improving operational efficiency while managing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

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 positive and reliable grounding path for the braided wire, maintaining its capacity and preventing disturbances, while significantly enhancing operational efficiency by simplifying the connection process and reducing errors.

Implementation Method 1

a first press-clamping portion which holds the shielded cable; a second press-clamping portion which holds the electric wire

Methodology Applied

Scientific EffectMechanical pressure: Mechanical Force

Implementation Method 2

a first press-contacting portion which is electrically connected to the braided wire of the shielded cable in a state that the shielded cable is pressed to be inserted into the first press-contacting portion; a second press-contacting portion which is electrically connected to the conductor of the electric wire

Methodology Applied

Scientific EffectElectrical conduction through pressure contact: Conduction (electrical)

Data Source

PatentUS7377801B2Shielded cable connecting structure

Publication Date: 2008.05.27 YAZAKI CORP

AI summary

A shielded cable connecting structure for connecting a shielded cable to an electric wire having a conductor, the shielded cable including an electric wire portion which has a conductor and an inner sheath covering the conductor, a braided wire braided around the inner sheath, and an outer sheath covering the braided wire, the shielded cable connecting structure includes a connecting member. The connecting member includes a connecting main body, a first press-clamping portion which holds the shielded cable, a second press-clamping portion which holds the electric wire, a first press-contacting portion which is electrically connected to the braided wire of the shielded cable in a state that the shielded cable is pressed to be inserted into the first press-contacting portion, and a second press-contacting portion which is electrically connected to the conductor of the electric wire in a state that the electric wire is pressed to be inserted into the second press-contacting portion in the same direction as a direction of insertion of the shielded cable into the first press-contacting portion. The braided wire of the shielded cable is connected to the electric wire through the first press-contacting portion and the second press-contacting portion.