Flush Handle Assembly With Inertia Release for Collision Deployment
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Solution Overview
Problem
Motor failure during a vehicle collision prevents the handle from transitioning to the deployed position, making it impossible to open the door.
Innovation Solution
A handle assembly with an inertia drive device that includes a handle, pushing member, limiting member, and inertia member, where the inertia member moves to a non-blocking position in response to excessive vehicle acceleration, releasing the pushing member to drive the handle to the deployed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motor is used to drive the handle to the deployed position, then the handle can be reliably deployed under normal conditions, but the system becomes vulnerable to motor failure during collisions
Solution Approach 1:
The handle assembly is segmented into two independent deployment systems: a motor-driven system for normal operation and an inertia-driven system for collision emergencies. The inertia drive device includes separate components (inertia member, pushing member, limiting member) that function independently of the motor system, ensuring that failure of one system does not compromise the other.
Solution Approach 2:
The inertia member is pre-positioned and pre-loaded with potential energy during normal vehicle operation. When a collision occurs and acceleration exceeds the threshold, the inertia member automatically moves to release the pushing member, which then pushes the handle to the deployed position. This preliminary positioning and automatic activation ensure rapid response without requiring external control systems.
2Ease of operation
If the handle is driven by a motor, then the deployment can be controlled under normal conditions, but control is lost during motor failure
Solution Approach 1:
The inertia-driven mechanism is a self-service system that automatically activates during collisions without requiring external control input. The inertia member, pushed by excessive acceleration, directly releases the pushing member which then autonomously pushes the handle to the deployed position. This self-activating mechanism ensures operation reliability during collisions when motor control may be compromised.
3Reliability
If an inertia drive device is added to the handle assembly, then collision emergency functionality is improved, but the device complexity increases
Solution Approach 1:
The inertia drive device is merged with the existing motor-driven handle assembly by integrating the inertia member, pushing member, and limiting member into the same structural framework. The pushing member serves dual purposes: it can be driven by the motor during normal operation and by the inertia member during collisions. This merging approach allows the emergency functionality to be added without creating a completely separate system, thereby reducing overall complexity.
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 can be deployed without relying on a motor, allowing the door to be opened even in the event of a collision, thereby enhancing safety and functionality.
Implementation Method 1
The inertia member is configured to move away from the initial position relative to the handle seat in response to an acceleration of the vehicle exceeding a threshold
Data Source
AI summary
A handle assembly having a handle seat, a handle, a pushing member, a limiting member, an inertia member. The handle is connected to the handle seat and has a retracted position and a deployed position. The pushing member is movably provided on the handle seat and has a locked state and a released state. The pushing member is capable of driving the handle to move when moving. The limiting member is movably provided on the handle seat and has a blocking position in which the limiting member holds the pushing member in the locked state and a non-blocking position in which the limiting member releases the pushing member to switch the pushing member from the locked state to the released state. The inertia member is configured to hold the limiting member in the blocking position when in its initial position, and is configured to move away from the initial position relative to the handle seat in response to an acceleration of the vehicle exceeding a threshold, such that the limiting member moves from the blocking position to the non-blocking position to release the pushing member, thereby allowing the pushing member to move to drive the handle to move from the retracted position to the deployed position.