Vehicle Door Handle Stopper Elastic Section Sound Suppression
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Solution Overview
Problem
Vehicle door handle devices generate unwanted sound during the pivoting movement of the door lock knob, which detracts from the high-class feel of the vehicle.
Innovation Solution
A vehicle door handle device with a stopper having an elastic section that limits the pivoting movement of the door lock knob, minimizing sound generation by distributing contact impacts across different regions of the stopper, and simplifying the construction by using a single stopper for both locking and unlocking directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stopper is provided to limit the pivoting movement of the door lock knob, then the pivoting movement can be limited effectively, but contact sound is generated when the door lock knob contacts the stopper
Solution Approach 1:
The stopper incorporates an elastic section that changes its physical state from rigid to flexible, allowing it to deform elastically when contacted by the door lock knob. This parameter change in material rigidity absorbs impact energy and suppresses contact sound while maintaining the limiting function.
Solution Approach 2:
The stopper is constructed as a composite structure combining a rigid stopper base section with a flexible elastic section (rubber member). This composite design allows the rigid portion to provide structural support and the elastic portion to absorb impact and reduce sound, resolving the contradiction between limiting movement and suppressing sound.
2Reliability
If separate stoppers are provided for locking and unlocking directions, then the pivoting movement can be limited precisely in both directions, but the construction becomes complex
Solution Approach 1:
The single stopper is designed with an asymmetric elastic section that serves dual functions: limiting pivoting movement in the locking direction and limiting pivoting movement in the unlocking direction. This multi-functional design eliminates the need for separate stoppers, simplifying construction while maintaining precise limiting capability in both directions.
Solution Approach 2:
Two separate stoppers (one for locking direction, one for unlocking direction) are merged into a single integrated stopper structure. The elastic section is strategically positioned and shaped to interact with the door lock knob during both locking and unlocking operations, combining multiple functions into one component.
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 suppresses contact sound during door lock knob operation, enhancing the vehicle's high-class feel and extending the stopper's lifespan by dispersing impacts across different regions.
Implementation Method 1
the stopper having an elastic section, the door lock knob having a locking surface section for abutting against (abuttingly contacting) the elastic section of the stopper
Data Source
AI summary
A vehicle door handle device, which is mounted on a side of a vehicle door facing a passenger compartment, includes: a door lock knob provided on a base member such that the door lock knob is pivotable between a locking position for placing the door in a locked state and an unlocking position for placing the door in an unlocked position; and a stopper provided on the base member between the locking position and the unlocking position for limiting pivoting movement of the door lock knob. The stopper has an elastic section, and the door lock knob has a locking surface section for abutting against the elastic section of the stopper when the door lock knob is in the locking position and an unlocking surface section for abutting against the elastic section of the stopper when the door lock knob is in the unlocking position.