Wiper Blade Support Frame With Segmented Cavity For Liquid Ejection
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Solution Overview
Problem
Existing wiper blade technologies face challenges in integrating structural strength for gripping and holding the blade during window wiping while also accommodating cleaning liquid ejection without increasing size or compromising aesthetics.
Innovation Solution
A wiper blade design featuring two distinct longitudinal cavities within the support frame, one for housing a stiffening element and another for liquid circulation, allowing for effective structural support and liquid projection without size or aesthetic penalties, with the cavities arranged vertically and optimized for efficient liquid evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single integrated cavity is used in the support frame, then the structure is simpler, but it cannot simultaneously accommodate stiffening elements and liquid circulation
Solution Approach 1:
The support frame is divided into two distinct longitudinal cavities: a first cavity for housing stiffening elements and a second cavity for liquid circulation. This segmentation allows each cavity to be optimized for its specific function while maintaining overall structural integration, resolving the contradiction between functional versatility and structural simplicity.
2Adaptability or versatility
If external ducts are attached to the wiper blade structure, then liquid ejection function is added, but the size and aesthetics are compromised
Solution Approach 1:
The liquid circulation duct is nested within the second longitudinal cavity of the support frame, integrating the liquid ejection function internally rather than as an external attachment. This nesting approach adds functionality while maintaining the original blade dimensions and aesthetic appearance.
Solution Approach 2:
The liquid circulation system is arranged in the longitudinal dimension within the support frame structure, utilizing the vertical space between the upper and lower surfaces of the frame. This dimensional arrangement allows liquid ejection functionality without increasing the blade's footprint or compromising its aesthetic profile.
3Strength
If the first cavity has greater width than the second cavity, then stiffening element accommodation is optimized, but liquid circulation space is reduced
Solution Approach 1:
The support frame exhibits varying local qualities along its length: the first cavity has greater width in certain sections to accommodate stiffening elements where structural strength is needed, while the second cavity maintains adequate width in liquid ejection zones. This localized variation optimizes both structural holding and liquid circulation where each function is required.
Data Source
Figure 1~5
Figure 6~8
AI summary
A wiper blade (1) comprises a support mount (4) for a wiper blade (2) adapted to make contact with the window to be wiped, and a blade attachment portion (8) for connecting a wiper connector arranged between the support mount and the blade. The support mount has at least two distinct cavities extending longitudinally, said two cavities being distinct in that at least a first cavity (10) receives a stiffening element (22) and in that a second cavity (12) is adapted to allow the circulation of liquid between a liquid inlet and at least one liquid outlet (24) formed in a wall (16) of said second cavity. The invention is particularly applicable to cleaning the windows of motor vehicles.