Conductive Steering Wheel Decorative Member ESD Grounding
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Solution Overview
Problem
Steering wheels with integrated switch assemblies are vulnerable to electrostatic discharges, which can damage the electrical components, and existing solutions do not effectively mitigate this issue.
Innovation Solution
A steering wheel design that incorporates a conductive decorative member and a contact element extending through a foam layer to electrically connect with the frame, allowing for the transmission of electrostatic discharges to the vehicle's chassis, thereby grounding and reducing damage to the switch assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a decorative member made of electrically conductive material is used, then the aesthetic appearance is improved, but the steering wheel becomes vulnerable to electrostatic discharges that can damage electrical components
Solution Approach 1:
A contact element is introduced as an intermediary component between the conductive decorative member and the frame. This contact element provides a controlled electrical pathway that safely directs electrostatic discharges from the decorative member to the frame, preventing uncontrolled discharge that would damage switch assemblies while maintaining the aesthetic benefits of the conductive decorative material
Solution Approach 2:
The invention converts the potentially harmful electrostatic discharge into a beneficial controlled electrical pathway. By providing a dedicated contact element that guides electrostatic energy safely to ground through the frame, the harmful electrostatic discharge is transformed into a protected discharge route that prevents damage to sensitive electrical components
2Reliability
If the contact element extends through the foam layer to connect the decorative member with the frame, then electrostatic discharge protection is improved, but the device complexity increases
Solution Approach 1:
The contact element is integrated with the decorative member as a unified component, where the contact element and decorative member work together as a combined assembly. This merging reduces the number of separate components and simplifies the overall structure while maintaining effective electrostatic discharge protection through the foam layer to the frame
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 grounds electrostatic discharges, reducing the risk of damage to the switch assemblies and ensuring safe operation of the vehicle's electrical systems.
Implementation Method 1
The contact element may be configured to transmit an electro-static discharge from the decorative member to the frame
Implementation Method 2
The contact element may extend through an opening in the foam layer to contact the frame and transmit an electro-static discharge from the electrically conductive material of the decorative member to the frame
Data Source
AI summary
A steering wheel for a vehicle may include a frame, a foam layer, a decorative member, a switch assembly and a contact element. The frame may include a central hub, a rim, and a spoke extending between the central hub and the rim. The foam layer may encase at least a portion of the frame. The decorative member may be mounted to the frame and may be at least partially formed of an electrically conductive material. The switch assembly may be mounted to the decorative member. The contact element may extend from the decorative member and may contact the frame to electrically connect the electrically conductive material of the decorative member with the frame.