Vehicle Door Handle Magnetic Haptic Feedback System
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Solution Overview
Problem
Mechanical haptic feedback systems in vehicle door latches, relying on bistable spring or elastic devices, suffer from friction-related wear, leading to a shorter lifespan due to sliding elements interacting with each other.
Innovation Solution
A vehicle door handle system utilizing static and mobile magnetic elements that generate haptic feedback through magnetic attraction and repulsion, eliminating mechanical friction and optimizing guiding means for reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical haptic feedback systems using bistable springs or elastic devices are used, then haptic feedback can be generated, but friction causes sliding elements to wear and reduces lifespan
Solution Approach 1:
The patent replaces the mechanical spring-based haptic feedback system with a magnetic field-based system. Mobile and static magnetic elements interact through magnetic attraction and repulsion forces to generate haptic feedback, eliminating the need for mechanical sliding contacts and springs that cause friction and wear.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the mobile handling element and the static handle frame. The magnetic field mediates the interaction, transmitting haptic feedback forces without requiring direct mechanical contact between sliding elements, thus avoiding friction-induced wear.
2Force
If sliding elements are used to generate haptic feedback, then feedback force can be generated, but strong friction reduces the lifespan of the handle
Solution Approach 1:
The patent substitutes mechanical friction-based force generation with magnetic field-based force generation. The haptic feedback force is produced through magnetic attraction and repulsion between mobile and static magnetic elements, eliminating the need for high-friction sliding contacts that limit component lifespan.
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 magnetic feedback system extends the lifespan of the door latch by minimizing friction and providing a reliable, durable haptic feedback mechanism without mechanical contact, enhancing user experience with a 'clicking' sensation during actuation.
Implementation Method 1
at least one static magnetic element fixed in motion with the handle frame and at least one mobile magnetic element solidary in motion with the handling element, generating a haptic feedback by defining stable or unstable positions of the handling element in which the static and mobile magnetic element face and attract or repel each other
Implementation Method 2
The magnets generate a feedback force without mechanical friction to generate said force
Data Source
AI summary
A vehicle door handle to control the opening of a vehicle door includes a door latch mechanism to release the vehicle door when actuated and a handling element mobile with respect to a handle frame between a rest position and an actuation position in which it actuates the door latch mechanism. The vehicle door handle also includes at least one static magnetic element fixed in motion with the handle frame and at least one mobile magnetic element solidary in motion with the handling element, generating a haptic feedback by defining stable or unstable positions of the handling element in which the static and mobile magnetic element face and attract or repel each other.