Wiper Blade Connecting Device Secure Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 'yokeless' windscreen wiper devices experience high forces at the connection between the connecting device and the oscillating arm, leading to the wiper blade becoming loose during use.
Innovation Solution
A connecting device with protrusion/hole means is used to securely attach the wiper blade to the oscillating arm, featuring a U-shaped cross-section and retaining mechanisms with protrusions and holes of varying circumferences to ensure a stable connection, including a resilient tongue for snap engagement and additional retaining means to prevent the wiper blade from detaching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple connecting device is used to attach the wiper blade to the oscillating arm, then the device complexity is reduced, but the connection reliability deteriorates due to high forces causing the wiper blade to become loose
Solution Approach 1:
The connecting device is divided into two separate parts: a first part with a U-shaped cross-section that receives the oscillating arm, and a second part that secures the wiper blade. This segmentation allows each part to be optimized for its specific function while maintaining overall simplicity and reliability of the connection system.
2Reliability
If multiple retaining means are added to prevent the wiper blade from detaching, then the connection reliability is improved, but the device complexity increases
Solution Approach 1:
Multiple retaining functions are merged into a single integrated connecting device structure. The first part provides a U-shaped retention for the oscillating arm, while the second part provides additional retention for the wiper blade, combining multiple retaining means into one unified component that does not significantly increase overall device complexity.
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
The solution provides a robust and secure connection between the connecting device and the oscillating arm, minimizing the risk of the wiper blade coming loose, even under high forces, while using a minimal number of parts.
Implementation Method 1
the first protrusion is designed as a resilient tongue snappingly engaging into the correspondingly shaped hole of the oscillating arm
Data Source
AI summary
A windscreen wiper device comprising an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, a connecting device pivotally connected to the connecting device about a pivot axis near one end. The connecting device comprises at least a first part and a second part and first and second retaining means for retaining the connecting device onto the oscillating arm. The first retaining means comprises at least one first protrusion on the second part engaging in a correspondingly shaped hole provided in the oscillating arm, and wherein the second retaining means comprise at least one second protrusion provided on the first part engaging the oscillating arm.