Segmented Windscreen Wiper Blade with Rotatory Mounting
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Solution Overview
Problem
Windshield wiper devices face challenges in maintaining contact with curved windshields, leading to incomplete wiping and smearing, and are difficult to exchange due to complex screw connections, which complicates maintenance and durability.
Innovation Solution
A windshield wiper device with a bendable wiper blade and a rotatory mounting system, featuring a wiper-blade-side fastening part that engages with a mounting element, allowing for simple mounting and dismounting by rotation, preventing tilting and facilitating easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the wiper blade is made rigid to maintain contact with the windshield, then the contact stability is improved, but the ability to adapt to curved windshields deteriorates
Solution Approach 1:
The wiper blade is divided into multiple segments (upper part and lower part) connected by connecting elements that allow relative movement. This segmentation enables each part to move independently to adapt to the curved surface of the windshield while maintaining overall contact stability through the coordinated movement of segments.
Solution Approach 2:
The connecting elements are designed to permit dynamic movement between the upper and lower parts of the wiper blade. This dynamic capability allows the blade to adjust its configuration in real-time to conform to curved windshield surfaces while maintaining stable contact during the wiping operation.
2Strength
If screw connections are used to fasten the wiper blade to the drive shaft, then the connection strength is improved, but the ease of replacement deteriorates
Solution Approach 1:
The fastening system is segmented into a separate mounting element and wiper blade assembly, allowing the blade to be detached and replaced independently from the drive shaft. This segmentation maintains secure operation during use while enabling easy replacement by separating the fastening function from the structural connection.
Solution Approach 2:
The mounting element provides sufficient fastening strength for normal operation but is designed with a simple attachment mechanism that requires minimal effort for replacement. The fastening system is optimized to provide adequate strength for the application while avoiding excessive complexity that would hinder maintenance.
3Ease of manufacture
If the wiper blade structure is simplified to reduce production costs, then the manufacturing cost is reduced, but the durability under diverse conditions deteriorates
Solution Approach 1:
The wiper blade is constructed as an assembly of separate components (upper part, lower part, connecting elements, mounting element) that can be manufactured independently using simple processes and then assembled. This segmentation allows each component to be produced cost-effectively while the overall assembly provides the durability needed for diverse operating conditions through its modular, replaceable design.
Data Source
AI summary
The present invention relates to a windscreen wiper device (100) for a vehicle, with a fastening element (52), in particular to a motor vehicle. The windscreen wiper device (100) comprises a mounting element (40) which is designed to be mounted on the fastening element (52), and a wiper blade (2) with an elongate upper part (10) and an elongate lower part (12), which are configured to be at least partially bendable. Furthermore, a plurality of connecting elements (18) for connecting the upper part (10) and the lower part (12) are provided, wherein the connecting elements (18) are spaced apart from one another along a longitudinal extent (8) of the wiper blade (2). The connecting elements (18) are designed to permit a movement of the upper part (10) and of the lower part (12) relative to one another with a movement component along a longitudinal extension (8) of the wiper blade (2). Furthermore, the wiper blade (2) comprises a wiper-blade-side fastening part (20). The wiper-blade-side fastening part (20) is configured in such a manner that, by means of a rotation of the wiper-blade-side fastening part (20) relative to the mounting element (40), an engagement can be formed in order to connect the wiper-blade-side fastening part (20) to the mounting element (40).