Windshield Wiper End Cap Assembly for Sealed Retention
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Solution Overview
Problem
Existing windshield wiper designs suffer from rainwater infiltration and corrosion of metal elastic sheets due to the lack of a sealed connection between the guiding shield and metal elastic sheets, leading to shortened service life, and end caps often detach over time.
Innovation Solution
An end cap assembly structure where posts of the end cap clamp clamping slots of elastic arms and blocks snap into snapping holes, providing a secure fixation on the guiding shield and elastic arms, ensuring the end cap remains firmly in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the guiding shield and metal elastic sheets are not sealed, then the assembly is simple, but rainwater infiltrates and corrodes the metal elastic sheets
Solution Approach 1:
The end cap is inserted over the elastic arms and guiding shield, creating a nested structure where the end cap serves as a protective outer layer. This nesting approach provides sealing without requiring complex assembly, as the end cap naturally envelops the internal components when installed.
Solution Approach 2:
The end cap is designed with flexible material that can elastically deform during assembly and operation. This flexibility allows the end cap to conform to the elastic arms and guiding shield, creating an effective seal against rainwater infiltration while maintaining structural integrity.
2Device complexity
If the end cap only sheathes the ends of metal elastic sheets and wiper strip, then the assembly is simple, but the end cap escapes due to aging after long time use
Solution Approach 1:
The connection mechanism between the end cap and elastic arms is segmented into multiple interaction points: the elastic arms have protrusions that engage with corresponding recesses in the end cap, creating discrete connection zones. This segmentation allows for reliable retention without requiring a completely complex integrated structure.
Solution Approach 2:
The end cap and elastic arms utilize elastic deformation dynamics to maintain connection. The flexible material allows for dynamic adjustment and maintains engagement force over time, preventing the end cap from escaping due to aging while keeping the structure relatively simple.
3Duration of action of stationary object
If the end cap is firmly fixed on guiding shield and elastic arms, then the service life is extended, but the assembly complexity increases
Solution Approach 1:
The end cap assembly structure utilizes self-service principles where the flexible material and geometric configuration of the end cap and elastic arms automatically create the firm fixation. The elastic deformation and engagement features work together to secure the connection without requiring additional fastening components or complex assembly procedures.
Data Source
AI summary
This disclosure is an end cap assembly structure. The elastic arms are inserted in the guiding shield. The wiper strip is inserted between the elastic arms. The end cap is adapted to sheathe the ends of the guiding shield and the elastic arms, and the wiper strip is exposed from the end cap. The end cap includes a shell, posts and blocks. The posts are disposed in the shell. The blocks are disposed on two sides of the shell. The elastic arms are combined with the guiding shield and the wiper strip, and inserted in the end cap. The posts clamp the clamping slots of the elastic arms, and the blocks snap the snapping holes of the elastic arms.