Vehicle Exterior Trim With Electrostatic Tape for Airflow Stability

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Solution Overview

Problem

Existing vehicle exterior designs around the window glass lack sufficient design quality and are prone to airflow disturbances due to static electricity, affecting driving performance and steering stability.

Innovation Solution

A decorating part is integrated into the vehicle door panel, extending vertically and incorporating an electrostatic tape on its back surface to neutralize static electricity, reducing airflow disturbances and enhancing design quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional door frame structure is used, then the manufacturing process is simple, but the design quality around the window glass is insufficient and airflow disturbances occur due to static electricity

Engineering Contradiction:

Improvedriving performance and steering stabilityVSAvoidexterior member structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single exterior member: the exterior member integrates both the aesthetic function (appearance part) and the electrostatic control function (electrostatic tape on the rear surface). This merging approach improves driving performance by eliminating airflow disturbances while maintaining design quality, without adding separate complex systems

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electrostatic tape acts as an intermediary element between the exterior member and the airflow. By placing the electrostatic tape on the rear surface of the appearance part, it mediates the interaction between the vehicle body and airflow, neutralizing static electricity and preventing airflow separation that would otherwise degrade driving performance

Inventive Principle:

Principle #24Intermediary (Mediator)

2Shape

If the exterior member is designed with an appearance part opposing the window glass edge, then design quality around the window glass is improved, but airflow disturbances due to static electricity still occur

Engineering Contradiction:

Improvedesign quality of vehicle exteriorVSAvoidairflow disturbance

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by differentiating the properties of different parts of the exterior member. The appearance part (front surface) is designed for aesthetic quality with a shape that opposes the window glass edge, while the rear surface incorporates electrostatic tape specifically to address airflow disturbances. This localized functional differentiation resolves both design quality and airflow disturbance issues simultaneously

Inventive Principle:

Principle #3Local quality

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 decorating part improves vehicle design quality and stabilizes airflow, thereby enhancing driving performance and steering stability by minimizing static electricity-induced airflow separation.

Implementation Method 1

incorporating an electrostatic tape on its back surface to neutralize static electricity

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentUS12503063B2Vehicle exterior structure

Publication Date: 2025.12.23 TOYOTA JIDOSHA KK

AI summary

A decorating part is provided near a boundary between a front fender panel and a front door panel. For example, the decorating part is provided at a front end in a vehicle longitudinal direction of the front door panel. The decorating part is a member extending in a vehicle vertical direction. For example, the decorating part has a color darker than the color of the front fender panel and the front door panel.