Flat-Blade Wiper Housing for Aerodynamic Fluid Delivery
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Solution Overview
Problem
Existing windscreen wiper devices face issues with ineffective cleaning due to the nozzle emitting washing fluid at a large distance from the windshield, leading to excessive liquid consumption and potential damage to the car's body, and the aerodynamic properties are compromised when the nozzle is mounted on the oscillating arm.
Innovation Solution
A windscreen wiper device with a connecting device that includes a housing for the rod-like extension, featuring a channel to receive the extension, providing a rigid and aerodynamic interconnection between the wiper blade and the rod-like extension, and integrating the nozzle onto the housing to improve airflow and reduce liquid usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the nozzle is fixedly mounted on the bonnet for spraying washing liquid, then the nozzle structure is simple, but the washing fluid is emitted at a large distance from the windscreen leading to excessive liquid consumption and ineffective cleaning
Solution Approach 1:
The patent merges the nozzle with the oscillating arm assembly, integrating the fluid application system directly into the wiping mechanism. This ensures the nozzle moves with the arm and positions the spray outlet close to the windscreen surface during operation, reducing fluid dispersion and consumption while maintaining effective cleaning coverage.
2Loss of substance
If the nozzle is mounted onto the oscillating arm to reduce liquid consumption, then washing fluid application efficiency improves, but aerodynamic properties of the interconnection between wiper blade and rod-like extension are negatively influenced
Solution Approach 1:
The patent employs a dynamic mounting solution where the nozzle is integrated into the oscillating arm assembly, allowing it to move with the arm during operation. This dynamic positioning ensures optimal spray proximity to the windscreen while maintaining aerodynamic compatibility through streamlined design of the interconnection components.
Solution Approach 2:
The patent modifies the aerodynamic parameters of the interconnection between the wiper blade and rod-like extension by optimizing the shape and configuration of the mounting structure. This reduces drag coefficients and minimizes the negative aerodynamic impact while preserving the nozzle's integrated position on the oscillating arm.
3Object-affected harmful factors
If a rigid interconnection is used between wiper blade and rod-like extension, then aerodynamic properties improve, but the complexity of the connecting device increases
Solution Approach 1:
The patent designs the connecting device to serve multiple functions simultaneously: it provides rigid aerodynamic interconnection, enables pivotal movement of the rod-like extension, and integrates the nozzle mounting structure. This multi-functionality reduces the need for separate components, maintaining aerodynamic efficiency while controlling overall device complexity.
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 solution ensures effective cleaning with reduced liquid consumption, minimizes damage to the car's body, and enhances aerodynamic performance by maintaining high velocity wiping with reduced pressure on the wiper blade, while allowing for easy integration of the nozzle for efficient fluid application.
Implementation Method 1
an elastic, elongated carrier element (4), as well as an elongated wiper blade (2) of a flexible material
Implementation Method 2
the rod-like extension (6) can be pivotally connected to said first part (8) about said pivot axis
Data Source
AI summary
A windscreen wiper device of the flat blade type comprising an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade includes at least one longitudinal slit, in which slit at least one longitudinal strip of the carrier element is disposed, which windscreen wiper device comprises a connecting device for a rod-like extension of an oscillating arm, wherein said rod-like extension can be pivotally connected to said connecting device about a pivot axis near a free end thereof, wherein said connecting device comprises a first part and a second part, wherein said rod-like extension of said oscillating arm can be pivotally connected to said first part about said pivot axis, with the interposition of said second part, wherein said first part is connected to said wiper blade and said second part is pivotally connected onto said first part, wherein said second part comprises a channel arranged to receive said free end of said rod-like extension, with the special feature that said windscreen wiper device comprises a housing for said rod-like extension, wherein said housing is arranged to be connected to said second part, and wherein said housing comprises a channel to receive said rod-like extension, said channel of said housing in mounted position being co-axial with said channel of said second part.