Wiper Blade Vertebral Force Transmission
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Solution Overview
Problem
Conventional wiper blades experience uneven transmission of pressing force and elastic force due to different heights of force application, leading to unstable wiping performance.
Innovation Solution
A wiper blade design with a holder main body and vertebrae system where the vertebrae are housed in movable housing parts, allowing stable transmission of forces and incorporating a fin part to enhance downforce application, with a two-color molding of materials for optimal strength and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pressing force is applied at a higher height than the elastic force (longer distance from windshield), then the wiper arm structure can be simplified, but the transmitting directions of pressing force and elastic force vary during reciprocating wiping, causing non-uniform wiping performance
Solution Approach 1:
The invention positions both the pressing force application point and the elastic force application point at the same height (same distance from the windshield). This creates equipotential conditions where both forces act from equivalent positions, ensuring their transmitting directions remain consistent throughout the reciprocating wiping motion, thereby achieving uniform and stable wiping performance
2Adaptability or versatility
If the vertebrae are made more elastic to better conform to windshield curvature, then the adaptability to curved surfaces improves, but the structural strength and stability may be compromised
Solution Approach 1:
The vertebrae are constructed using composite materials that combine elastic properties for conforming to windshield curvature with sufficient structural strength. This composite structure allows the vertebrae to flex and adapt to curved surfaces while maintaining the rigidity needed for stable force transmission and overall structural integrity
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 ensures stable transmission of forces for improved wiping performance, reduces weight, and optimizes drag and lifting forces, enhancing the overall effectiveness of the wiper blade.
Implementation Method 1
a pair of vertebrae housed in each of the housing parts and elastically deforming the blade rubber in accordance with a curvature factor of the windshield
Implementation Method 2
a holder pressing part that is provided in an opposed part to the windshield of each of the housing parts and in a side closer to the windshield than the rubber pressing part and pressing the holder main body toward the windshield by elastic force of the vertebra
Data Source
AI summary
Provided is a wiper blade wherein: a pair of accommodation sections (31d) are disposed so as to sandwich therebetween a holding section (31a) that holds a main body section (21); a vertebra (31e) is accommodated in each of the accommodation sections (31d); an arm connection member (40) to which a wiper arm is connected is fixed to each vertebra (31e); a rubber pressing section (31f) that presses the main body section (21) towards a front glass is disposed in a section of the holding section (31a) that faces the front glass; and a holder pressing section (31g) that presses a holder member (30) towards the front glass by the elastic force of each vertebra (31e) is disposed in the section of each accommodation section (31d) that faces the front glass, further on the front glass side than the rubber pressing section (31f).