Flat-Blade Wiper Nozzle Mounting for Direct Windshield Spray
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Solution Overview
Problem
Conventional windscreen wiper devices often require excessive washing fluid and inefficiently distribute it, leading to ineffective cleaning and potential damage to vehicle components due to the nozzle's distance from the windscreen and high liquid consumption.
Innovation Solution
A windscreen wiper device with a nozzle mounted directly onto a rod-like extension of the oscillating arm, allowing the nozzle to closely follow the arm's movement and spray washing fluid directly onto the windscreen, reducing liquid consumption and preventing damage by minimizing fluid dispersion onto the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the nozzle is fixedly mounted on the bonnet at a large distance from the windscreen, then the structure is simple and easy to manufacture, but the washing fluid is not effectively distributed onto the windscreen and excessive liquid is required
Solution Approach 1:
The nozzle is mounted on the oscillating arm, making it a dynamic component that moves with the arm during oscillation. This dynamic mounting allows the nozzle to maintain a consistent, close distance to the windscreen throughout the wiping cycle, ensuring effective fluid distribution and reducing consumption.
Solution Approach 2:
The nozzle function is merged with the oscillating arm assembly rather than being a separate fixed component. By integrating the nozzle into the moving wiper system, the patent achieves both effective fluid delivery and reduced structural complexity compared to extended rigid mounting structures.
2Object-affected harmful factors
If the nozzle is positioned at a large distance from the windscreen, then the mounting structure is simpler, but the washing fluid is dispersed onto the vehicle body causing damage
Solution Approach 1:
By mounting the nozzle on the oscillating arm, the system dynamically maintains optimal positioning close to the windscreen surface. This dynamic positioning ensures precise fluid delivery exactly where needed, preventing dispersion onto surrounding vehicle components and eliminating the need for complex positioning mechanisms.
Solution Approach 2:
The washing fluid is delivered with localized precision directly onto the windscreen surface through the oscillating nozzle. This localized delivery ensures that fluid is applied only where required for cleaning, preventing harmful contact with paint, rubber, and plastic components of the vehicle body.
3Reliability
If excessive washing fluid is used to compensate for poor distribution, then the cleaning coverage is improved, but the liquid consumption increases and causes damage to vehicle parts
Solution Approach 1:
The dynamic positioning of the nozzle on the oscillating arm ensures consistent close proximity to the windscreen throughout the wiping cycle. This maintains effective fluid distribution across the entire wiping area, achieving reliable cleaning with minimal fluid consumption and eliminating the need to over-apply washing fluid.
Solution Approach 2:
The oscillating arm mechanism itself serves the dual function of both wiping and fluid delivery. As the arm oscillates, the mounted nozzle automatically tracks with the motion, providing self-adjusting fluid distribution that ensures effective cleaning without requiring additional fluid to compensate for positioning inaccuracies.
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, with the special feature that said connecting device comprises a channel arranged to receive said free end of said rod-like extension, wherein said windscreen wiper device comprises a nozzle for spraying a washing liquid onto said windscreen to be wiped, wherein said nozzle is mounted onto said rod-like extension by sliding a ring-like mounting part of said nozzle over the free end of said rod-like extension in a direction away from said free end.