Vehicle Door Handle Locking Structure to Prevent Cover Rattling
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Solution Overview
Problem
Existing vehicle door handle manufacturing processes require a melting operation to prevent rattling, which reduces manufacturing efficiency.
Innovation Solution
A vehicle door handle design featuring front and back covers connected by a locking body with an elastically deformable leg portion and a locking hook that interferes with a locked portion, eliminating the need for a melting operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a melting operation is performed on the through portion to prevent rattling, then the connection reliability between front and back covers is improved, but the manufacturing efficiency is reduced
Solution Approach 1:
The patent replaces the thermal field (melting operation) with a mechanical field solution. The elastic locking body with deformable leg portion and locking hook provides mechanical interlocking and press-contact between covers, eliminating the need for melting while maintaining connection reliability and preventing rattling.
Solution Approach 2:
The patent extracts and eliminates the melting operation from the manufacturing process. By using the elastic locking body structure with pre-formed locking hooks and locked portions, the harmful thermal processing step is removed entirely, improving manufacturing efficiency while maintaining connection reliability through mechanical engagement.
2Ease of manufacture
If the locking body is designed with an elastically deformable leg portion, then the ease of manufacture is improved by eliminating melting operations, but the complexity of the locking mechanism increases
Solution Approach 1:
The patent changes the physical parameter of the locking body by introducing elastic deformability through the leg portion. This allows the locking body to be manufactured as a single elastic component without melting operations, simplifying manufacturing while the elastic property enables the locking/unlocking functionality.
Solution Approach 2:
The patent introduces dynamic characteristics to the locking mechanism through the elastically deformable leg portion. The locking body can dynamically adjust during engagement, deforming to accommodate the locking hook and then elastically recovering to maintain press-contact, providing a simple yet functional locking mechanism.
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 reduces rattling after connection and enhances manufacturing efficiency by eliminating the need for a melting operation.
Implementation Method 1
a leg portion 3 configured to elastically deform
Implementation Method 2
The locking body 5 is biased and the locking hook 4 is press-contacted to the locked portion 6 in a locking state
Data Source
AI summary
A vehicle door handle includes a pair of front and back covers which are connected to each other. One of the front and back covers includes a locking body. The locking body includes a leg portion configured to elastically deform and a locking hook projecting from a tip end of the leg portion. The locking hook is elastically locked and connected to a locked portion formed on the other of the front and back covers. The locking body is biased and the locking hook is press-contacted to the locked portion in a locking state of the locking body and the locked portion.