Wiper Blade Connection Part Water Seal Design
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Solution Overview
Problem
Existing windshield wiper blades experience 'overspray' due to water being pressed into and sucked out of the cover cap by wind pressure and negative pressure during operation, leading to water being sprayed back onto the cleaned area.
Innovation Solution
A wiper blade design featuring a connection part with a pocket-like depression and a groove-like receiving channel on the cover cap, which is watertight on the side facing the wiper strip, preventing water from entering or exiting, and a base element that directs water to an outlet opening for controlled drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover cap has openings and gaps for water drainage, then water can flow off during wiping operation, but rain and spray water is pressed into the cover cap through these openings and gaps due to high wind pressure causing overspray
Solution Approach 1:
The cover cap is divided into two functional zones: a watertight sealing area that prevents water ingress, and a controlled drainage area with the receiving channel that allows water egress. This segmentation enables the cap to simultaneously prevent overspray while maintaining drainage functionality.
Solution Approach 2:
The receiving channel acts as an intermediary structure between the external environment and the cover cap interior. It provides a controlled interface that allows water to drain while preventing direct pressure-driven ingress through the cap walls.
2Object-affected harmful factors
If the connection part is sealed watertight to prevent water ingress, then overspray is reduced, but water accumulated in the connection part cannot be drained off
Solution Approach 1:
The drainage function is extracted from the general sealing structure by introducing a dedicated receiving channel. This separate drainage pathway allows water to be removed from the connection part without compromising the overall watertight seal that prevents overspray.
3Object-affected harmful factors
If the side of the connection part facing away from the wiper strip is designed without openings to prevent water seepage, then overspray is reduced, but the overall structure becomes more complex
Solution Approach 1:
The cover cap integrates multiple functions into a single component: it provides structural coverage, creates a watertight seal, and incorporates the receiving channel for drainage. This merging reduces the need for separate components and simplifies the overall assembly while maintaining the no-openings design.
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
Reduces 'overspray' by preventing water from entering or exiting the connection part, ensuring that accumulated water is drained off, thereby minimizing water spray back onto the cleaned area during operation.
Implementation Method 1
The pocket-like depression is watertight on its side facing the wiper strip
Implementation Method 2
The pocket-like depression is watertight on its side facing the wiper strip
Implementation Method 3
the base element being designed to drain water entering the connection part during wiping operation to the outlet opening
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a wiper blade (12) for a windshield wiper, having a wiper strip (20) and a connection component (60) fastened to the wiper strip (20) for linking the wiper strip (20) to a wiper arm (14), that can be connected in a pivoting fashion around a pivot axis (48) to the connection component (60) via an articulated element (44) and can be fastened via a retaining link (34) to an angled retaining hook (36) on the connection component (60), wherein the connection component (60) has a pocket-like recess (40) for accommodating the angled retaining hook (36) on the side (72) thereof facing away from the wiper strip (20), wherein the pocket-like recess (40) is sealed water-tight on the side (42) thereof facing the wiper strip (20).