Vehicle Door Checker Assembly With Lateral Contact Surfaces
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Solution Overview
Problem
Existing door checker assemblies for vehicles are complex to produce and assemble, and they can suffer from noise and durability issues due to foreign substances on the operation surfaces.
Innovation Solution
A door checker assembly with a simpler structure, featuring torsion bars, sliders, and cases formed integrally, which allows for easier production and assembly, and includes operation surfaces on the lateral surfaces of the checker arm to prevent noise and durability issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door checker is configured with multiple constituent elements (operating members and elastic members) in a housing, then the door checker can function to assist opening and closing of the door, but the assembly process takes a lot of time and the structure becomes complex
Solution Approach 1:
The patent integrates the operating member, elastic member, and housing into a single integrated door checker assembly. The operating member is directly formed within the housing structure, and the elastic member is pre-installed in the housing before assembly, reducing the number of separate components and simplifying the overall structure while maintaining the door-assisting function
2Force
If the operation surfaces of the checker arm are formed on upper and lower surfaces, then the door checker can pressurize the checker arm, but foreign substances deposited on the operation surface cause noise and reduce durability
Solution Approach 1:
Instead of forming operation surfaces on the upper and lower surfaces of the checker arm, the patent inverts the design by forming the operation surface on the lateral surface of the checker arm. This lateral surface configuration prevents foreign substances from being deposited on the operation surface during operation, thereby eliminating noise and improving durability while maintaining the pressurization function
3Ease of manufacture
If multiple components are assembled separately, then the door checker can be manufactured with modular parts, but the assembly process takes a lot of time
Solution Approach 1:
The patent combines multiple components into an integrated structure where the operating member and housing form a unified assembly. The elastic member is pre-installed in the housing, and the operating member is directly formed within the housing structure, reducing the number of separate assembly steps and significantly improving assembly speed while maintaining manufacturability
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 proposed solution simplifies the assembly process, reduces noise and durability issues, and lowers production costs and weight by integrating sliders and cases with torsion bars through injection-molding.
Implementation Method 1
a door checker through which the checker arm passes and moves... each of the torsion bars may comprise an operating part... the slider may be provided on one side of the torsion bar
Data Source
AI summary
A door checker assembly for a vehicle which is installed between a vehicle body and a door and assists an opening and closing operation of the door is provided. A door checker assembly for a vehicle according to an example embodiment of the present disclosure may include a checker arm; and a door checker through which the checker arm passes and moves. According to an example embodiment of the present disclosure, the checker arm may include one or more operation surfaces, and the door checker may include a pair of torsion bars; a slider provided on one side of each of the torsion bars; and a case which joins and fixes the pair of torsion bars to each other. According to an example embodiment of the present disclosure, an operation surface of the checker arm may be configured to be formed in a lateral surface direction.