Modular Wiper Blade Assembly with Separate Washer Accessory
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Solution Overview
Problem
The existing 'flat blade' wiper blade assemblies for motor vehicles face manufacturing difficulties due to the co-extrusion of multiple materials, increased rigidity, and challenges in connecting accessory segments and maintaining fluid circulation, especially at low temperatures.
Innovation Solution
A wiper blade assembly design where the longitudinal support and accessory are produced independently, allowing for simpler assembly and fluid connection, with the accessory being fixed to the support using various methods such as clipping, articulated lugs, or notches, and incorporating transversal notches for improved flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If co-extrusion of multiple materials is used to integrate support and accessory functions, then functional integration is achieved, but manufacturing complexity and difficulty increase
Solution Approach 1:
The patent divides the wiper blade assembly into separate modular components: a support element and an accessory element that can be assembled together. This segmentation allows each component to be manufactured independently using simpler processes, while still achieving the integrated functionality through mechanical assembly rather than complex co-extrusion
2Adaptability or versatility
If co-extrusion of multiple materials is used to integrate support and accessory functions, then functional integration is achieved, but the rigidity of the wiper blade assembly increases
Solution Approach 1:
By separating the support and accessory into distinct components, each can be optimized for its specific function without compromising overall flexibility. The support element maintains appropriate rigidity for structural function, while the accessory element can be designed with suitable flexibility for its specific purpose, avoiding the excessive rigidity that would result from co-extrusion
3Ease of operation
If the solid longitudinal part is cut into two segments to insert a connector, then connection to driving mechanism is enabled, but the complexity of connecting accessory segments and maintaining fluid circulation increases
Solution Approach 1:
The patent employs modular segmentation where the accessory element is designed as a separate component that can be easily attached to the support. This segmentation simplifies the connection process by providing standardized interfaces, and maintains fluid circulation through integrated fluid passages that connect the segments without requiring complex assembly procedures
4Stability of the object's composition
If co-extrusion of complex profile is used, then integrated structure is obtained, but manufacturing difficulty increases
Solution Approach 1:
The patent resolves the manufacturing difficulty by dividing the complex integrated structure into two simpler components that can be manufactured using standard extrusion or molding processes. The support element and accessory element are each produced separately with simpler profiles, then assembled together to achieve the final integrated structure, avoiding the need for complex multi-material co-extrusion
Data Source
AI summary
The invention relates to a wiper blade assembly for the windows of a motor vehicle, comprising a longitudinal support (10) intended to receive a pressure application vertebra (20) and a wiper blade (30) and a wiper accessory (40) carrying a device (42a, 42b) for distributing and projecting a washer liquid wherein the accessory is intended to be assembled with the longitudinal support (10).According to the invention, the longitudinal support (10) comprises means for fixing said accessory (40) on said support.