Door Handle Restriction Lever for Normal and Collision States
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Solution Overview
Problem
Existing door handle devices for vehicles require multiple parts to restrict handle operation in normal and collision states, leading to an excessive number of components.
Innovation Solution
A door handle device with a single restriction lever that moves between normal and emergency positions to restrict handle rotation, using a mass body that remains in place during collisions to prevent unintended door opening, without adding extra parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a restriction mechanism is added to restrict handle operation in normal state, then door opening can be restricted in normal state and during side collision, but the number of parts increases excessively
Solution Approach 1:
The patent combines the normal state restriction function and the side collision restriction function into a single restriction lever mechanism. The restriction lever integrates multiple restriction positions (normal restriction position and side collision restriction position) that can selectively engage with different portions of the transmission lever depending on the operational state, thereby achieving dual functionality without requiring separate restriction mechanisms for each state.
Solution Approach 2:
The restriction lever is designed as a multi-functional component that performs both normal state restriction and side collision restriction. By positioning the restriction lever to engage with different portions of the transmission lever at different angles, a single component achieves what would traditionally require multiple separate components, thus reducing overall device complexity while maintaining comprehensive restriction capability.
2Adaptability or versatility
If multiple restriction mechanisms are used for normal and collision states, then comprehensive restriction coverage is achieved, but device complexity and part count increase
Solution Approach 1:
The transmission lever is divided into multiple functional portions (first portion and second portion) that can be selectively engaged by the restriction lever. The restriction lever itself is segmented in its engagement capability, allowing it to restrict rotation at different stages of the handle's rotational path depending on the operational state, thereby providing comprehensive restriction coverage through a unified mechanism.
Solution Approach 2:
The restriction mechanism employs dynamic engagement where the restriction lever can selectively engage with different portions of the transmission lever based on the handle's rotational position and the operational state (normal or collision). This dynamic adaptability allows a single restriction lever to provide comprehensive restriction coverage across different states without requiring multiple static restriction mechanisms.
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 restricts handle operation in normal states and during side collisions, preventing unintended door opening while minimizing the number of components.
Implementation Method 1
when an inertial force equal to or greater than a set value is applied, the restriction lever is movable to an emergency restriction position in which rotation of the handle is restricted
Data Source
AI summary
A door handle device includes a handle rotatable between an initial position at which a door latch device cannot be actuated to open and an emergency operation position at which the door latch device is manually actuated to open, via a normal operation position for electrically actuating the door latch device to open, and a restriction lever attached to a base. The restriction lever includes a normal restriction portion for restricting rotation of the handle at the normal restriction position, a restriction release portion for releasing rotational restriction of the handle by the normal restriction portion, and an emergency restriction portion for restricting rotation of the handle at the emergency restriction position.