Vehicle Door Handle Guide Wall Rattle Suppression
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Solution Overview
Problem
Conventional vehicle door handles experience rattling issues due to vertical movement and deformation of guide walls, leading to a poor grip feel and stability, especially when users apply vertical force.
Innovation Solution
The vehicle door handle design features lever-shaped handle main bodies with parallel inner surfaces of guide walls and a stopper engagement mechanism, where the guide walls are reinforced with connection portions to prevent deformation and ensure stable operation, reducing rattle and enhancing grip feel by eliminating gaps between the stopper and guide walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the guide walls are formed with inclined inner wall surfaces to facilitate mold separation, then the ease of manufacture is improved, but gaps are formed between the guide walls and stopper, causing rattle and deteriorating the grip feel
Solution Approach 1:
The patent introduces a connection portion that extends in a direction perpendicular to the inclined inner wall surface of the guide wall. This additional dimensional element connects the guide walls without requiring changes to the inclined surfaces, thereby maintaining ease of manufacture while eliminating gaps that cause rattle and improving grip feel.
2Loss of substance
If the guide walls are made thin to reduce material usage, then the loss of substance is improved, but the guide walls deform under vertical force, increasing rattle and reducing stability
Solution Approach 1:
The patent divides the guide wall structure into multiple segments: the main guide wall body and the connection portion. This segmentation allows the guide walls to remain thin for material efficiency while the connection portion provides additional structural support to prevent deformation and maintain stability under vertical force.
3Ease of manufacture
If the inner wall surfaces of guide walls are inclined to widen distance from rear to tip, then the ease of manufacture is improved, but vertical movement of the stopper increases, causing rattle
Solution Approach 1:
The connection portion acts as an intermediary element between the guide walls and the stopper. It provides lateral support to the stopper, preventing vertical movement and rattle, while allowing the guide walls to maintain their inclined inner wall surfaces for ease of 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
The solution effectively suppresses vertical movement and rattle, providing an improved grip feel and stability by ensuring the stopper and guide walls maintain contact, thus enhancing user experience and reducing manufacturing costs through simplified assembly processes.
Implementation Method 1
The elastic member (coil spring) consists of a torsion spring or the like that urges the handle main body in a direction of returning the main body into an original state when the handle main body is operated
Data Source
AI summary
A vehicle door handle includes a handle main body and a base member for attaching the handle main body to the vehicle door. The handle main body is lever-shaped, and is supported by the base member to be rotatable in a predetermined range, the handle main body having one of both ends serving as a spindle and the other end serving as a free end, a hook protruding toward the base member in a longitudinal direction of the handle main body formed on the free end of the handle main body. A stopper abutting on the base member formed on a tip end of the hook, and guide walls adjacent to both side surfaces of the stopper, are formed on the base member.