Windshield Wiper Cover Structure for Secure Low-Noise Attachment
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Solution Overview
Problem
Windshield wipers with covers tend to separate from the windshield, leading to uneven cleaning, increased material and assembly costs, and high wind noise due to aerodynamic turbulence.
Innovation Solution
A windshield wiper design featuring an elongate cover with an elastomeric region and a central collar, along with attachment mechanisms at the ends to secure the cover to the wiper frame, reducing separation and aerodynamic turbulence through a cambered surface and snap-fit securing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If covers are added to the windshield wiper to improve aerodynamic performance and reduce wind lift, then the wiper's ability to maintain contact with the windshield is improved, but the material and assembly costs increase
Solution Approach 1:
The cover is integrated with the wiper blade assembly such that the cover, attachment mechanisms, and wiper frame form a unified structure. This merging eliminates the need for separate cover components that would require additional assembly steps, while still providing the aerodynamic benefits of a covered design.
Solution Approach 2:
The cover is designed as a thin, flexible shell that can be easily attached to the wiper blade. This thin-film approach reduces material usage and simplifies the overall structure compared to rigid, bulky covers, thereby reducing both material costs and assembly complexity while maintaining aerodynamic performance.
2Reliability
If covers are added to the windshield wiper to improve aerodynamic performance, then wind lift is reduced, but the covers are prone to separation or detachment
Solution Approach 1:
The attachment mechanisms are pre-integrated into the cover structure during manufacturing, with attachment features already positioned and prepared. This preliminary action ensures that when the cover is installed on the wiper blade, the attachment mechanisms are immediately engaged, preventing separation before it can occur during operation.
Solution Approach 2:
The cover is divided into multiple sections with individual attachment mechanisms at different locations along its length. This segmentation allows each section to be independently secured to the wiper frame, distributing the attachment forces and preventing detachment that would occur if a single continuous cover were used.
3Reliability
If covers are added to the windshield wiper to improve aerodynamic characteristics, then wind lift is reduced, but high profile regions create aerodynamic turbulence and wind noise
Solution Approach 1:
The cover is designed with smooth, curved surfaces that follow aerodynamic contours, eliminating sharp edges and high-profile interruptions. The curved geometry allows air flow to transition smoothly over the cover, reducing turbulence and vortex formation that would otherwise generate wind noise, while still providing the necessary aerodynamic benefits.
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 reduces cover separation and wind noise, enhancing the durability and aerodynamic performance of windshield wipers while minimizing material costs.
Implementation Method 1
an elongate cover with an elastomeric region
Implementation Method 2
reducing separation and aerodynamic turbulence through a cambered surface
Data Source
AI summary
A cover for windshield wiper blades having an elongate body with a central collar and first and second elongate portions extending from the central collar. The first and second elongate portions having outer ends, and the central collar defining an interior passageway having a snap-fit tongue. A channel is disposed along each of the first and second elongate portions extending from the central collar towards the outer ends; and an end retainer or other securing mechanism is located at the outer ends. Also, windshield wiper blades incorporating such covers.