Wiper Blade Spoiler Coupling Mechanism
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Solution Overview
Problem
The existing wiper blade assemblies experience deterioration in wiping performance due to floating caused by wind forces, leading to weak contact with the windshield, and the spoiler often separates from the elastic member during operation.
Innovation Solution
A wiper blade assembly design that includes a contact member, an elastic member, a cover member, and a coupling cover with specific protrusions and holes to securely fasten the spoiler, preventing separation and maintaining contact with the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spoiler is coupled with the elastic member by being fitted into it, then the spoiler can be mounted on the wiper blade assembly, but the spoiler separates from the elastic member during operation
Solution Approach 1:
The coupling mechanism is divided into multiple independent coupling protrusions and coupling holes distributed at different positions. This segmentation allows each coupling point to independently maintain the attachment, so if one coupling point experiences stress, the others continue to hold the spoiler firmly in place, preventing separation during operation.
Solution Approach 2:
Multiple coupling protrusions and coupling holes are combined to form a unified coupling system. The coupling cover integrates several coupling protrusions that simultaneously engage with corresponding coupling holes in the extended plate, creating a distributed multi-point attachment system that enhances overall reliability and prevents spoiler separation.
2Productivity
If the wiper blade assembly is operated at higher speeds, then the wiping coverage increases, but the floating force becomes stronger causing the wiper blade to float from the windshield surface
Solution Approach 1:
The spoiler generates aerodynamic downforce that acts as a counterweight to the floating force caused by wind pressure. The spoiler's airfoil shape creates a pressure differential that produces a downward force, counterbalancing the upward floating force and maintaining firm contact between the wiper blade and windshield surface during high-speed operation.
Solution Approach 2:
The harmful floating force generated by high-speed wind flow is converted into a beneficial aerodynamic downforce. The spoiler utilizes the same high-speed air flow that causes floating to generate counteracting downforce, transforming the harmful effect into a beneficial force that improves wiping performance at higher speeds.
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 design effectively restricts the movement of the cover member and securely fastens it to the elastic member, ensuring reliable attachment and improved wiping performance by preventing the spoiler from separating, thus enhancing the wiper blade assembly's contact with the windshield.
Implementation Method 1
The cover member includes: a spoiler; an extended plate extended from one end of the spoiler; a first coupling protrusion located in a first predetermined position of the extended plate; and a first coupling hole located in a second predetermined position of the extended plate adjacent to the first coupling protrusion
Implementation Method 2
The coupling cover includes: a second coupling hole located in an inner space thereunder and receiving the first coupling protrusion of the cover member; and a second coupling protrusion located adjacent to the second coupling hole and inserted into the first coupling hole of the cover member
Implementation Method 3
The spoiler has a profile that creates a counterforce toward the surface of the windshield in reaction with the air flow
Data Source
AI summary
Disclosed herein is a wiper blade assembly including: a contact member; an elastic member for supporting the contact member; a cover member for covering the elastic member; and a coupling cover to be fastened to the elastic member. The cover member includes: a spoiler; an extended plate extended from one end of the spoiler; a first coupling protrusion located in a first predetermined position of the extended plate; and a first coupling hole located in a second predetermined position of the extended plate adjacent to the first coupling protrusion. The coupling cover includes: a second coupling hole located in an inner space thereunder and receiving the first coupling protrusion of the cover member; and a second coupling protrusion located adjacent to the second coupling hole and inserted into the first coupling hole of the cover member. The cover member can be reliably fixed to the wiper blade assembly.