Vehicle Door Handle Restriction Device Prevents Rattling
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Solution Overview
Problem
Existing outer handle devices for vehicle doors experience rattling issues when the handle lever is driven by an electric actuator, leading to degraded marketability due to inertial force causing the lock release lever to operate beyond its proper position and return to the initial position side, resulting in rattling of the outer handle.
Innovation Solution
An outer handle device with a restriction device that follows the movement of the handle lever away from its initial position when driven by the electric actuator, restricting its return to the initial position and preventing rattling, featuring a restricting member with an inclined abutment face and a resilient urging member to ensure proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the lock release lever is driven by an electric actuator to pivot the outer handle from housed position to pop-up position, then the outer handle can be automatically positioned, but the lock release lever operates beyond the proper position due to inertial force and rattles when abutted against the pin
Solution Approach 1:
The restriction device is designed to preemptively counteract the harmful effect of inertial force by following the movement of the lock release lever during actuation and physically restricting its return movement beyond the pop-up position, thereby preventing rattling before it occurs
Solution Approach 2:
The restriction device acts as an intermediary component between the lock release lever and the pin, mediating the interaction by following the lever's movement and controlling its return path to prevent excessive operation and rattling
2Measurement precision
If the lock release lever is restricted from returning to the initial position side by a fixed pin, then the outer handle can be positioned at the pop-up position, but the lock release lever rattles due to inertial force and reaction force
Solution Approach 1:
The restriction device is designed with dynamic characteristics to follow the movement of the lock release lever during actuation and then restrict its return movement, adapting its behavior to the operational phase rather than being a static fixed pin
Solution Approach 2:
The restriction device provides beforehand cushioning by being positioned to receive and control the return movement of the lock release lever, preventing excessive operation and cushioning the impact that would cause rattling
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 restriction device effectively prevents rattling of the handle lever and outer handle, enhancing marketability by maintaining the handle lever's position beyond the proper position and restricting its return to the initial position, thus eliminating rattling and improving user experience.
Implementation Method 1
a resilient urging member that urges the restricting member toward a side on which the inclined abutment face is made to abut against the handle lever
Implementation Method 2
an electric actuator that is mounted on the support case so as to be capable of switching between an energized and operated state in which the handle lever is driven from the initial position
Data Source
AI summary
In an outer handle device for a vehicle door, a handle lever is operatively linked to an outer handle, the handle lever being driven by an electric actuator so that the outer handle is pivoted from a housed position to a pop-up position. A restriction device operates so as to follow movement of the handle lever toward a side that goes away from an initial position when the handle lever is driven by the electric actuator so that the outer handle is pivoted from the housed position toward the pop-up position side, the restriction device restricting return of the handle lever to the initial position side from a maximum operated position of the handle lever toward the side that goes away from the initial position. Accordingly, it is possible to prevent the outer handle from rattling, thereby enabling marketability to be enhanced.