Vehicle Handle Assembly With Inertial Collision Extension

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Solution Overview

Problem

In vehicle handle assemblies, a motor failure during a collision prevents the handle from extending to an operable position, making it impossible to open the door.

Innovation Solution

A handle assembly with an inertial piece that drives the rotation mechanism to extend the handle from a retracted to an extended position when the vehicle experiences a collision, utilizing a rotation mechanism with elastic limiting structures to prevent unwanted retraction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a motor is used to drive the handle extension, then the handle can be extended to the operable position, but the system becomes vulnerable to motor failure during collision

Engineering Contradiction:

Improvehandle extension reliabilityVSAvoidmotor system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent removes the motor from the handle assembly, extracting the unreliable powered component and replacing it with a purely mechanical inertial-driven system. The handle extension is achieved through the inertial piece's movement during collision, eliminating the need for motors, batteries, and electronic controls while maintaining reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The inertial piece utilizes the vehicle's collision energy to automatically drive the handle extension without external power sources. The system serves itself by converting the collision's inertial force directly into the mechanical action needed to extend the handle, eliminating dependence on external motors or power systems.

Inventive Principle:

Principle #25Self-service

2Shape

If the handle is kept retracted to maintain flush appearance, then the aesthetic quality is improved, but the handle cannot be operated during collision

Engineering Contradiction:

Improvehandle appearanceVSAvoidhandle operability during collision

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The handle transitions from a static retracted state to a dynamic extended state based on collision detection. The inertial piece monitors vehicle acceleration and automatically extends the handle when collision thresholds are exceeded, allowing the handle to adapt its state according to operational needs while maintaining flush appearance during normal conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent converts the harmful effect of collision (which would normally cause damage) into a beneficial action by utilizing the collision's inertial force to extend the handle. The collision energy that could cause harm is instead harnessed to automatically activate the handle extension mechanism, ensuring operability precisely when needed.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If the handle extends automatically during collision, then the safety is improved, but the device requires inertial pieces and rotation mechanisms

Engineering Contradiction:

Improveautomatic handle extensionVSAvoidrotation mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the handle assembly into functionally independent segments: the inertial piece for collision detection, the rotation mechanism for handle movement, and the elastic limiting structure for position control. This segmentation allows each component to perform its specific function efficiently while working together to achieve reliable automatic extension with minimal overall complexity.

Inventive Principle:

Principle #1Segmentation

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

Ensures the handle automatically extends during a collision, allowing door opening without relying on a motor, enhancing safety and functionality.

Implementation Method 1

the at least one inertial piece is configured to move relative to the handle seat when an acceleration of the vehicle exceeds a threshold, and drive the rotation mechanism to rotate

Methodology Applied

Scientific EffectInertial force: Inertia

Implementation Method 2

an elastic limiting structure configured to provide the rotation mechanism with a first blocking force that prevents rotation in the first rotation direction when the rotation mechanism is in the initial rotation position, and provide the rotation mechanism with a second blocking force that prevents rotation in the second rotation direction when the rotation mechanism is in the rotation end position

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS20260015897A1Handle Assembly and Vehicle

Publication Date: 2026.01.15 ILLINOIS TOOL WORKS INC

AI summary

A handle assembly, used for a vehicle, having: a handle seat; a handle mounted on the handle seat and having a retracted position and an extended position; a rotation mechanism rotatably mounted on the handle seat and operatively coupled to the handle; and at least one inertial piece which is disposed on the rotation mechanism, or at least partially forms the rotation mechanism, or is capable of acting on the rotation mechanism; wherein the at least one inertial piece is configured to move relative to the handle seat when an acceleration of the vehicle exceeds a threshold, and drive the rotation mechanism to rotate in a first rotation direction to drive the handle to move from the retracted position to the extended position. The handle assembly of the present disclosure enables automatic extension of the handle by transferring the inertial energy generated by the collision of the inertial piece to the handle.