Windscreen Wiper Joint Part Snapping Connection Mechanism
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Solution Overview
Problem
Existing windscreen wiper devices lack a secure and efficient mechanism for connecting and disconnecting the wiper blade to the oscillating arm, leading to potential instability and ease of use issues.
Innovation Solution
The introduction of a U-shaped joint part with a recess and cooperating pivot means in the connecting device allows for a snapping connection and disconnection of the oscillating arm, enhanced by protrusions for blocking longitudinal movement and a resilient free end for secure attachment, enabling easy mounting and demounting while ensuring retention in all directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a resilient tongue is used to connect the wiper blade to the oscillating arm, then the connection can be made and released by pushing the resilient tongue against spring force, but the connection mechanism lacks security and stability in retaining the wiper blade
Solution Approach 1:
The patent combines multiple retention mechanisms into a single integrated joint part: the resilient tongue provides initial engagement, while protrusions on the joint part engage with corresponding recesses on the oscillating arm to provide additional retention. This merging of multiple retention methods into one component simultaneously improves ease of operation (through the resilient tongue's push-button action) and reliability (through multiple engagement points).
Solution Approach 2:
The joint part serves as an intermediary component between the wiper blade and the oscillating arm. It features both a resilient tongue for initial connection and protrusions that act as mediators to engage with the oscillating arm's recesses, providing secure retention. This intermediary structure allows the system to achieve both easy operation and reliable retention without directly connecting the wiper blade to the oscillating arm.
2Reliability
If the wiper blade is securely retained to the oscillating arm, then stability is improved, but the ease of mounting and demounting the wiper blade is reduced
Solution Approach 1:
The joint part incorporates a resilient tongue that can dynamically change its state between engaged and disengaged positions. When force is applied, the resilient tongue deforms and allows the connection to be released; when the force is removed, it springs back to secure the connection. This dynamic characteristic enables the system to provide secure retention during normal operation while allowing easy mounting and demounting when needed.
Solution Approach 2:
The resilient tongue changes its physical state (deformation) in response to applied force. During normal operation, it maintains a secured state with the oscillating arm. When force is applied to release the connection, the tongue deforms and changes its engagement parameter, allowing the wiper blade to be removed. This parameter change enables secure retention during use while facilitating easy removal when required.
3Shape
If multiple yokes pivotally connected to each other are used, then the wiper blade can be biased with specific curvature, but the device complexity increases
Solution Approach 1:
The patent extracts the essential function of multiple pivotally connected yokes (providing biased curvature to the wiper blade) and implements it through a single carrier element with integrated curvature. Instead of using multiple separate yokes connected through joints, the design takes out the curvature-generating function and embeds it directly into the carrier element's shape, significantly reducing device complexity while maintaining the desired wiper blade curvature.
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 solution provides a secure, easy-to-use, and versatile connection mechanism that enhances the retention of the wiper blade to the oscillating arm, ensuring effective operation and ease of maintenance by allowing for snap-in/snap-out functionality.
Implementation Method 1
a resilient free end of the joint part can pivot about a hinge axis for snappingly connecting the oscillating arm to the joint part
Implementation Method 2
The connecting device is preferably fixedly connected to the longitudinal strips through a welding, brazing ('soldering'), gluing or clamping operation
Implementation Method 3
The connecting device is preferably fixedly connected to the longitudinal strips through a welding, brazing ('soldering'), gluing or clamping operation
Data Source
AI summary
A windscreen wiper device comprising a carrier element, as well as an elongated wiper blade of a flexible material, which windscreen wiper device comprises a connecting device for an oscillating arm, wherein the oscillating arm is pivotally connected to the connecting device about a pivot axis near one end, with the interposition of a joint part, with the special feature that the connecting device and the joint part are provided with mutually cooperating pivot means for pivotally connecting the joint part to the connecting device, the joint part having an at least substantially U-shaped cross-section at wherein the joint part comprises a recess in the base of the U-shaped cross-section for snappingly connecting the oscillating arm to the joint part.