Wiper Blade Six-Point Support Structure for Lifting Prevention
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Solution Overview
Problem
Existing wiper blades suffer from weak structure and increased size due to lever assemblies made of synthetic resin, leading to poor gripping on windshields and potential lifting or chattering during high-speed vehicle operation.
Innovation Solution
A wiper blade with a six-point support structure featuring arc-shaped first and second levers, where the first levers are point-supported and the second levers are hinge-coupled to both the cover member and the wiper strip, enhancing the wiper strip's contact pressure and preventing lifting and chattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the lever assembly is made of synthetic resin, then the appearance is improved by enclosing the lever assembly, but the size of the levers and lever assembly increases to ensure insufficient strength and stiffness
Solution Approach 1:
The patent uses a composite structure combining synthetic resin for the cover member (aesthetic function) with a different material for the lever assembly (structural function). This allows the lever assembly to be made of material with superior strength and stiffness properties while the resin cover provides the desired appearance, resolving the contradiction between aesthetic improvement and size increase.
2Shape
If the lever assembly is made of synthetic resin, then the appearance is improved, but the strength and stiffness are insufficient
Solution Approach 1:
The patent employs composite materials where the lever assembly is constructed from material with high strength and stiffness characteristics, while the cover member is made of synthetic resin for aesthetic purposes. This material differentiation resolves the contradiction by assigning each component the material best suited for its primary function.
Solution Approach 2:
The wiper blade is segmented into distinct functional components: the lever assembly (structural support) and the cover member (aesthetic enclosure). This segmentation allows each part to be optimized independently - the lever assembly for strength and the cover for appearance - thereby resolving the contradiction between these competing requirements.
3Reliability
If a pin is installed to prevent lifting, then the lifting prevention is achieved, but the size of the wiper blade increases and the appearance deteriorates
Solution Approach 1:
The patent merges the lifting prevention function into the existing lever assembly structure rather than adding a separate pin component. The lever assembly itself is designed to provide both structural support and lifting prevention through its configuration and connection to the wiper strip, eliminating the need for additional protruding elements that would worsen appearance.
4Device complexity
If a four-point support structure with hinge connection is used, then the structure is simplified, but the squeezing of both ends of the wiper strip onto the windshield glass is not good
Solution Approach 1:
The patent employs a dynamic lever assembly with multiple levers that can flex and adjust during operation. This dynamic structure allows the system to maintain simplified construction while effectively transmitting squeezing force to both ends of the wiper strip, as the levers can adapt to the curvature and pressure distribution on the windshield surface.
Solution Approach 2:
The patent transitions from a simple planar four-point support to a multi-dimensional lever system with multiple degrees of freedom. The lever assembly incorporates vertical and angular adjustments that enable effective force transmission to both ends of the wiper strip while maintaining overall structural simplicity.
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 six-point support structure ensures improved gripping and prevents lifting and chattering during high-speed vehicle operation by distributing pressure evenly across the wiper strip, enhancing the wiper blade's stability and appearance.
Implementation Method 1
The six-point support structure ensures improved gripping and prevents lifting and chattering during high-speed vehicle operation by distributing pressure evenly across the wiper strip
Implementation Method 2
a pair of the second levers, each with one end hinge-coupled to a corresponding one of the first levers and with the other end coupled with the cover member and the wiper strip
Data Source
AI summary
A wiper blade includes a wiper strip for contacting a windshield glass of a vehicle, a lever assembly supporting the wiper strip to squeeze onto the windshield glass, and a cover member containing the lever assembly, wherein the lever assembly includes, a pair of first levers, each with both ends engaged with and point-supporting the wiper strip to form an engaging portion on the wiper strip respectively, and a pair of the second levers, each with one end hinge-coupled to a corresponding one of the first levers and with the other end coupled with the cover member and the wiper strip.