Vehicle Door Handle Buffer Integration for Quieter Return
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Solution Overview
Problem
Existing vehicle door handle devices generate an impact sound when the handle returns to its initial position after a pulling operation, which can be distracting and affect the overall quietness of the vehicle.
Innovation Solution
The door handle device incorporates a buffer member held by a transmission member to absorb the impact sound when the handle returns to its initial position. This configuration maintains the size and assemblability of the device while enhancing quietness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a buffer member is added to suppress impact sound, then quietness is improved, but device size increases
Solution Approach 1:
The buffer member is integrated with the transmission member by providing a holding portion on the transmission member. This merging approach allows the buffer member to be positioned effectively for sound suppression while utilizing the existing transmission member structure, thereby avoiding additional space requirements and preventing an increase in overall device size.
Solution Approach 2:
The transmission member is designed to serve dual functions: operating the lock mechanism in response to pushing operations and holding the buffer member to suppress impact sounds during handle return. This multi-functionality allows the same component to address both locking operations and noise suppression, eliminating the need for separate dedicated structures and maintaining compact device dimensions.
2Object-affected harmful factors
If a buffer member is added to suppress impact sound, then quietness is improved, but assemblability deteriorates
Solution Approach 1:
The buffer member is merged with the transmission member through the holding portion, creating an integrated sub-assembly. This integration means the buffer member is positioned and secured as part of the existing transmission member assembly process, rather than requiring separate installation steps. The buffer member becomes part of the transmission member unit, simplifying the overall assembly workflow and maintaining ease of manufacture.
Solution Approach 2:
The holding portion on the transmission member is pre-configured to receive and secure the buffer member. This preliminary preparation of the transmission member allows the buffer member to be easily attached during the normal assembly process, rather than requiring additional complex assembly steps or modifications to the base structure.
3Volume of stationary object
If the buffer member is held by the transmission member, then device size is maintained, but the transmission member structure becomes more complex
Solution Approach 1:
The holding portion is provided at a specific local position on the transmission member where it can effectively hold the buffer member. This localized addition focuses the structural modification only where needed, rather than requiring complex changes throughout the entire transmission member. The holding portion is a simple localized feature that adds minimal complexity while achieving the sound suppression function.
Solution Approach 2:
The transmission member is segmented into functional portions, with the holding portion being a distinct but integrated element. This segmentation allows the holding portion to be designed and manufactured as a relatively simple feature, and the transmission member can be assembled with the buffer member in a straightforward manner, minimizing the increase in overall structural 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
The implementation of a buffer member effectively suppresses impact sounds during handle return, thereby improving the quietness of the door handle device without increasing its size or compromising assemblability.
Implementation Method 1
a buffer member configured to suppress an impact sound when the pulling-operated handle returns to the initial position
Implementation Method 2
a first biasing member configured to bias the pulling-operated handle toward the initial position
Data Source
AI summary
A door handle device includes a base to be attached to a door, a handle rotatably supported by the base and subjected to a pulling operation pulled toward a front surface side from an initial position and a pushing operation pushed toward a rear surface side from the initial position, a first biasing member configured to bias the pulling-operated handle toward the initial position, an end lever operably attached to the base and configured to operate in response to the pushing operation of the handle so as to drive a lock mechanism, and a buffer member configured to suppress an impact sound when the pulling-operated handle returns to the initial position. The end lever is provided with a holding portion configured to hold the buffer member.