Wiper Blade Spoiler Guide Rib Water Flow Control
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Solution Overview
Problem
Existing wiper blades suffer from impaired wiping quality due to water accumulation and spray mist or droplets reaching the vehicle window during downward movement, caused by turbulence and vortices at the connection element.
Innovation Solution
The implementation of guide ribs on the outflow side of the spoiler parts and connecting elements, along with filler pieces and webs, to redirect water flow and prevent accumulation, thereby minimizing turbulence and spray onto the vehicle window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wiper blade has a connecting element for articulated connection to the wiper arm, then the wiper blade can be articulatedly connected to the wiper arm, but water accumulates at the connecting element due to turbulence and reaches the vehicle windshield as spray
Solution Approach 1:
A spoiler part is introduced as an intermediary element between the connecting element and the airflow. The spoiler part includes a guide profile with a groove that redirects water flow away from the connecting element, preventing water accumulation and spray formation while maintaining the articulated connection functionality.
Solution Approach 2:
The harmful water flow path is extracted and separated from the main body of the wiper blade by using the spoiler part to redirect water away. The groove in the guide profile extracts water from the turbulent flow and channels it away from the connecting element, eliminating the spray problem.
2Ease of operation
If the guide profile on the downstream side projects laterally beyond the leg on the downstream side forming a groove, then the spoiler sections are guided, but water still accumulates due to turbulence at the connecting element
Solution Approach 1:
The spoiler part acts as an intermediary that modifies the airflow and water flow patterns. The guide profile with its groove structure serves as a mediator between the turbulent flow at the connecting element and the free flow, redirecting water away before it can accumulate and form spray.
3Productivity
If the wiper blade moves downward during operation, then the wiper blade performs wiping function, but accumulated water reaches the vehicle windshield as spray and water droplets impairing wiping quality
Solution Approach 1:
The spoiler part with its guide profile serves as a protective intermediary that intercepts and redirects water flow during the downward movement of the wiper blade. This prevents water from reaching the windshield and interfering with the wiping quality, while the wiping function continues uninterrupted.
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
Prevents water from accumulating and forming vortices at the connection element, ensuring improved wiping quality by reducing spray mist and droplets on the windshield during wiper blade operation.
Implementation Method 1
water flows along the drive-side, inner spoiler section towards the connecting element due to aerodynamic conditions, where it collects due to turbulence
Implementation Method 2
water flows along the drive-side, inner spoiler section towards the connecting element due to aerodynamic conditions
Data Source
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AI summary
The invention relates to a wiper blade (10) designed as a flat bar with a wiper strip (12) which is held by a spring-elastic strip support element (14) that is pre-curved in a concave manner with respect to a wiper lip (16) of the wiper strip (12). One or more spoiler parts (22, 23) are attached to the support element (14) face facing away from the wiper lip (16) by means of guiding profiles (30) which cover the support element (14) from the outer longitudinal faces and project to a certain extent with respect to the outflow side (26) of the spoiler part (22, 23) and which form a groove (31) with said outflow side. A connecting element (18, 64) is fixed in the central region of the wiper blade (10) for connecting a wiper arm in an articulated manner. According to the invention, the guiding profile (30) on the outflow side (26) has a guiding ridge (32, 34, 40) on the guiding profile longitudinal face pointing outwards.