Windshield Wiper Blade Force Distribution Structure
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Solution Overview
Problem
Beam wiper blades lack lateral stability and often experience wrapping issues when their curvature is too sharp for windshields, making them unsuitable for aftermarket applications where the vehicle type is unknown.
Innovation Solution
A windshield wiper assembly with a force distribution structure comprising a primary frame, secondary frame, and tertiary frames, featuring boss and pocket connecting structures that pivotally engage to secure the wiper strip, providing improved stability and adaptability across different windshield curvatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If beam wiper blades are used to achieve a lower profile and uniform distribution, then manufacturing simplicity is improved, but lateral stability deteriorates
Solution Approach 1:
The wiper blade is divided into multiple independent frame segments (primary frame, secondary frames, tertiary frames) connected by pivotal boss-pocket joints. This segmentation allows each segment to independently adapt to windshield curvature while maintaining overall structural stability, resolving the contradiction between simple beam construction and lateral stability.
Solution Approach 2:
The frame structures incorporate pivotal connecting structures that allow dynamic adjustment of the blade's curvature and angle. The boss-pocket connections enable the frames to pivot and adapt to different windshield geometries, providing the lateral stability needed for universal applications while maintaining the simplicity of a frameless beam design.
2Adaptability or versatility
If beam wiper blades have sharp curvature to fit windshields, then contact performance is improved, but wrapping issues occur making them unsuitable for universal applications
Solution Approach 1:
The pivotal boss-pocket connecting structures enable the frame segments to dynamically adjust their curvature and angle during installation and operation. This dynamic adaptability allows the blade to conform to various windshield geometries without excessive wrapping, making it suitable for universal aftermarket applications across different vehicle types.
Solution Approach 2:
The blade's geometric parameters (curvature, angle, segment orientation) can be adjusted through the pivotal connections to match different windshield specifications. This parameter adjustability resolves the contradiction between achieving sharp curvature for good contact and preventing excessive wrapping that causes reliability issues.
3Stability of the object's composition
If traditional brackets are used to improve lateral stability, then stability is improved, but banding problems occur
Solution Approach 1:
Instead of using traditional rigid brackets that cause banding, the invention segments the support structure into multiple flexible frame elements connected by pivotal joints. This segmentation distributes the support forces along the blade length, preventing the concentrated pressure points that cause banding while maintaining lateral stability.
Solution Approach 2:
The frame structures function as flexible support elements that can bend and conform to the blade's curvature without creating rigid contact points. This flexibility eliminates the banding effect associated with traditional brackets while providing the necessary lateral stability for universal application.
Data Source
AI summary
A windshield wiper assembly may include a wiper strip, and a force distribution structure securing the wiper strip comprising. The force distribution structure may include a primary frame structure, and a secondary frame structure. The primary frame structure may include a central base portion, a leg extending from the central base portion to its end, and a first boss connecting structure. The secondary frame structure may include a first complementary connecting structure such that the first boss connecting structure and the first complementary connecting structure pivotally engage one another.