Vehicle Door Handle Inertia Locking Mechanism
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Solution Overview
Problem
Existing vehicle door handle assemblies fail to reliably prevent unwanted actuation during vehicle impacts/collisions due to inconsistent inertia directions, leading to potential occupant ejection.
Innovation Solution
A vehicle door handle assembly featuring a slider, handle member, connecting arms, and an inertia locking mechanism with a blocking lever and weight, which prevents the handle member from moving to the actuating position by blocking the slider's guide pin through a guide slot, using biasing members to maintain the blocking position during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking mechanism is provided to prevent unwanted actuation of the handle member during vehicle impact/collision, then the reliability of the door handle assembly is improved, but the device complexity increases due to additional components such as blocking lever, weight, and locking mechanism
Solution Approach 1:
The blocking lever is designed to dynamically respond to impact forces by rotating between a blocking position (during collision) and an unblocking position (during normal operation). This dynamic behavior allows the mechanism to automatically engage or disengage based on the applied force, eliminating the need for complex control systems while maintaining high reliability during impacts.
Solution Approach 2:
The inertia-based blocking mechanism is self-activating during vehicle impact/collision without requiring external control signals or power sources. The weight and blocking lever automatically engage when subjected to impact forces, providing passive safety functionality that reduces system complexity while ensuring reliable operation during critical events.
2Ease of manufacture
If the blocking mechanism is designed to be simple and easy to manufacture, then the ease of manufacture is improved, but the reliability of preventing unwanted actuation during collision decreases due to inconsistent inertia directions
Solution Approach 1:
The guide slot geometry is specifically designed with varying widths to accommodate the blocking lever at different positions. The slot is narrower at the blocking position to ensure reliable engagement and wider at the unblocking position to allow free movement. This parameter variation in the guide slot ensures consistent blocking functionality regardless of impact direction while maintaining a simple overall structure that is easy to manufacture.
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
Effectively prevents the handle member from actuating unintentionally during vehicle impacts, ensuring occupant safety by maintaining the door closed until the collision force is resolved, allowing for smooth opening after the event.
Implementation Method 1
an inertia locking mechanism including a blocking lever pivotally mounted to the handle housing, and a weight mounted on the blocking lever, wherein the inertia locking mechanism may prevent the handle member from moving to the actuating position by an unwanted force caused by the collision/impact of the vehicle
Data Source
AI summary
A vehicle door handle assembly may include a handle housing disposed inside a door panel; a slider slidably mounted in the handle housing to be movable between a first position and a second position of the handle housing; a handle member pivotally connected to the slider through a connecting arm, and configured of being movable between a rest position and an actuating position with respect to the door panel; and an inertia locking mechanism including a blocking lever pivotally mounted to the handle housing, and a weight mounted on the blocking lever, wherein the inertia locking mechanism may prevent the handle member from moving to the actuating position by an unwanted force caused by the collision/impact of the vehicle.