Windscreen Wiper Blade with Resilient Bottom for Curvature Adaptation
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Solution Overview
Problem
Existing windscreen wiper devices struggle to accommodate varying windshield curvatures and tolerances, leading to inefficient wiping and increased noise during oscillatory movement.
Innovation Solution
The windscreen wiper device features a flexible wiper blade with a central longitudinal groove and a resilient bottom that allows the wiping element to move perpendicular to the windshield, compensated by pressure from a spring-loaded carrier strip, with stop surfaces limiting oscillation and reducing noise, and an oscillating arm connected via a bayonet-style mounting system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid wiper blade structure is used, then structural stability is improved, but adaptability to different windshield curvatures deteriorates
Solution Approach 1:
The wiper blade incorporates a resilient bottom that allows dynamic movement of the wiping element between first and second positions in response to pressure variations from the carrier strip, enabling the blade to adapt its shape to different windshield curvatures while maintaining structural integrity
Solution Approach 2:
The wiping element's position parameter changes in response to pressure exerted by the longitudinal carrier strip, allowing the blade to adjust its curvature to match different windshield shapes. The resilient bottom enables this parameter change while the overall structure maintains stability
2Manufacturing precision
If the wiping element is fixed in position, then manufacturing precision is improved, but adaptability to windscreen shape variations deteriorates
Solution Approach 1:
The wiping element is designed to move dynamically between first and second positions in response to pressure from the carrier strip, allowing the system to compensate for windscreen shape variations while maintaining precise control over the wiping motion through the resilient bottom mechanism
3Ease of manufacture
If the wiper blade structure is simplified, then ease of manufacture is improved, but noise reduction capability deteriorates
Solution Approach 1:
The wiper blade is segmented into distinct functional components: a resilient bottom, a movable wiping element, and a longitudinal carrier strip. This segmentation allows each component to perform its specific function - the resilient bottom absorbs movement and reduces reversal noise, while the overall structure remains relatively simple and easy to manufacture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables the wiper blade to adapt to different windshield curvatures and shapes, reducing noise and improving wiping efficiency by allowing the wiping element to adjust its position based on pressure, while minimizing material usage and weight.
Implementation Method 1
said wiping element is allowed to move in a direction perpendicular to a windscreen to be wiped, dependent on the pressure exerted by the longitudinal strip on the wiper blade, due to the resiliency of said bottom
Implementation Method 2
said wiping element is in said first position at a pressure A exerted by the longitudinal strip on the wiper blade, wherein said wiping element is in said second position at a pressure B exerted by the longitudinal strip arm on the wiper blade
Data Source
Figure 1
Figure 2~5
AI summary
A windscreen wiper device (1) comprising an elastic, elongated carrier element, as well as an elongated wiper blade (2) of a flexible material, said wiper blade (2) comprising a wiping element (14) which can be placed in abutment with a windscreen to be wiped, which wiper blade (2) includes a central longitudinal groove (3), in which groove (3) a longitudinal strip (4) of the carrier element is disposed, which windscreen wiper device (1) comprises a connecting device (6) for an oscillating arm (7), wherein said oscillating arm (7) is pivotally connected to said connecting device (6) about a pivot axis near one end thereof, with the special feature that said wiping element (14) is movable in a direction at least substantially perpendicular to a windscreen to be wiped, dependent on the pressure exerted by the longitudinal strip (4) on the wiper blade (2).