Wiper Blade End Cap Fluid Distribution
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Solution Overview
Problem
Existing wiper blade devices with fluid channels and wind deflector units face challenges in achieving uniform fluid output and pressure distribution, leading to inefficient cleaning of windshields.
Innovation Solution
The wiper blade device incorporates a wiper blade end cap that forms an end piece for the fluid channel, featuring connection extensions and fluid output elements to ensure fluidic sealing and uniform fluid distribution, with the end cap designed to plug into the fluid channel and extend into the fluid output openings to enhance fluid output conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a fluid channel with fluid output openings is used in the wiper blade device, then fluid output is achieved, but uniform fluid distribution and pressure distribution are not achieved
Solution Approach 1:
The fluid channel is segmented into multiple sections with multiple fluid output openings distributed along its length. The end cap further segments the fluid distribution by providing additional output openings at the end region, creating multiple fluid discharge points that collectively achieve uniform fluid distribution across the windshield surface.
Solution Approach 2:
Different regions of the fluid channel have different characteristics - the main channel provides fluid output at intermediate positions, while the end cap region provides additional output at the terminal end. This local differentiation ensures that fluid is distributed uniformly across different zones of the windshield, addressing the non-uniform distribution problem.
2Quantity of substance
If the fluid channel is extended to improve fluid output, then fluid quantity increases, but pressure distribution becomes non-uniform
Solution Approach 1:
The extended fluid channel is segmented with multiple output openings along its length rather than a single end outlet. This segmentation divides the fluid delivery into multiple stages, maintaining pressure balance by distributing fluid at intermediate points, thereby preventing pressure loss and ensuring uniform pressure distribution while achieving high fluid output quantity.
Solution Approach 2:
The end cap acts as an intermediary component that receives fluid from the extended channel and redistributes it through additional output openings. This intermediary structure balances the pressure by providing an additional fluid discharge path at the end region, preventing pressure buildup while maintaining uniform pressure distribution across the system.
3Reliability
If the wiper blade end cap is designed to plug into the fluid channel, then fluidic sealing is achieved, but device complexity increases
Solution Approach 1:
The end cap is merged with the fluid channel to form an integrated assembly. The end cap is designed to plug directly into the channel with engagement features that combine sealing and structural functions in a single component, achieving reliable fluidic sealing without adding separate sealing elements or complex assembly mechanisms.
Solution Approach 2:
The end cap serves multiple functions simultaneously: it seals the end of the fluid channel, provides additional fluid output openings, and structurally completes the channel assembly. This multi-functionality reduces the need for separate components, thereby achieving reliable sealing while minimizing device complexity.
Data Source
AI summary
A wiper blade device (10a; 10b; 10c) with at least one fluid channel (14a; 14b; 14c) which has at least one fluid output opening (16a, 16a′; 16b, 16b′; 16c, 16c′), in particular at least one nozzle element (50a, 50a′; 50b, 50b′; 50c, 50c′), to form a fluid output, and with at least one wind deflector unit (18a; 18b; 18c), on and/or in which the at least one fluid channel (14a; 14b; 14c) is arranged. The wiper blade device (10a; 10b; 10c) has at least one wiper blade end cap (12a, 12a′; 12b, 12b′; 12c, 12c′) which forms at least one end piece of the fluid channel (14a; 14b; 14c).