Windscreen Wiper Arm Nozzle Mounting for Precise Fluid Application
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Solution Overview
Problem
Existing windscreen wiper systems are inefficient in cleaning the windshield due to the nozzle spraying washing fluid at a large distance, resulting in excessive liquid consumption and potential damage to the car's surfaces, as the fluid often spreads onto the car's body instead of the windshield.
Innovation Solution
A windscreen wiper arm with a detachably connected nozzle that engages with a U-shaped adapter, allowing the nozzle to closely follow the wiper arm's oscillatory motion, ensuring precise fluid application directly onto the windshield, and optionally using a second nozzle for enhanced coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the nozzle is fixedly mounted on the car body at a distance from the windscreen, then the nozzle structure is simple and easy to install, but the washing fluid is sprayed at a large distance causing excessive liquid consumption and potential damage to car surfaces
Solution Approach 1:
The nozzle is integrated with the windscreen wiper arm, combining the washing fluid application function with the wiper mechanism. This ensures the nozzle moves with the wiper arm and maintains close proximity to the windscreen throughout the wiping cycle, eliminating the problem of fluid dispersion and excessive consumption while avoiding complex separate mounting structures.
Solution Approach 2:
The nozzle is detachably connected to the adapter, allowing it to be mounted and dismounted. This dynamic connection enables the nozzle to follow the oscillatory motion of the wiper arm while maintaining ease of installation and removal, resolving the contradiction between close proximity and simple mounting.
2Measurement precision
If the nozzle is detachably connected to the adapter, then the nozzle can closely follow the wiper arm's oscillatory motion for precise fluid application, but the mounting structure becomes more complex
Solution Approach 1:
The connection system is divided into separate components: the adapter with engagement features and the nozzle with corresponding detachable connection elements. This segmentation allows for precise positioning and following of the wiper arm's motion while maintaining ease of assembly and disassembly, reducing the perceived complexity through modular design.
Solution Approach 2:
The adapter acts as an intermediary component between the wiper arm and the nozzle. It provides the detachment mechanism and positioning features that enable precise fluid application while simplifying the overall connection structure through a standardized interface.
3Object-affected harmful factors
If the nozzle sprays washing fluid at a large distance from the windscreen, then the nozzle is easier to position on the car body, but the washing fluid spreads onto the car body causing damage to paint and surfaces
Solution Approach 1:
The adapter serves multiple functions: it provides detachable connection, positions the nozzle correctly, and enables the nozzle to follow the wiper arm's motion. This multi-functionality eliminates the need for complex separate positioning mechanisms while ensuring the nozzle remains close to the windscreen to prevent fluid damage to car surfaces.
Data Source
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AI summary
A windscreen wiper arm, particularly for automobiles, being able to oscillate upwardly and downwardly between a downward position and an upward position, wherein said windscreen wiper arm at one end thereof is arranged to be pivotally connected to a mounting head mounted on a drive shaft, and wherein said windscreen wiper arm at another end thereof is rigidly connected to an adapter arranged to be connected, with the interposition of a joint part, to an elongated wiper blade to be placed in abutment with a windscreen to be wiped, wherein said adapter, at the location of its connection to said wiper blade, has a U-shaped cross-section with a base and two spaced-apart legs, with the special feature that said windscreen wiper arm is provided with a nozzle for spraying a washing liquid onto said windscreen to be wiped, wherein said nozzle is detachably connected to said adapter, wherein at least one protrusion of the nozzle engages into a corresponding hole in one of the legs of the U-shaped cross-section of the adapter, said protrusion extending inwardly in a direction towards said adapter, said protrusion having a shank passing through said hole, as well as an enlarged head abutting an inner wall of said leg provided with said hole, and wherein said joint part is provided with a slit in which said enlarged head rests for blocking any movement of said protrusion in a direction towards said windscreen to be wiped and in a direction away from said windscreen to be wiped.