Sealed Windshield Wiper Structure with TPV Waterproof Cover
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Solution Overview
Problem
The existing windshield wiper structures are not airtight, leading to rainwater penetration and corrosion of the metal elastic sheet, which shortens the service life, especially in icy conditions where the elastic force is compromised.
Innovation Solution
A sealed type windshield wiper structure featuring a waterproof cover with a thermoplastic vulcanization (TPV) shell, an elastic piece inserted through a carrying seat, and end plugs to seal the cover, isolating the elastic piece from external moisture, maintaining elasticity and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional combination structure of wiper cover and metal elastic sheet is used, then the structure is simple and easy to manufacture, but the structure is not airtight allowing rainwater penetration and corrosion
Solution Approach 1:
The patent applies a flexible waterproof cover made of thermoplastic vulcanization (TPV) material that envelops the metal elastic sheet. This flexible shell provides airtight sealing while accommodating the elastic deformation of the metal sheet during wiper operation, effectively preventing rainwater penetration without requiring rigid complex structures.
Solution Approach 2:
The patent implements a nested structure where the metal elastic sheet is inserted into the waterproof cover, and end plugs are inserted into both ends of the cover to seal it. This nested arrangement creates multiple sealing layers, ensuring the metal elastic sheet is fully isolated from external moisture while maintaining a relatively simple overall structure.
2Duration of action of stationary object
If the metal elastic sheet is exposed to external moisture, then the structure remains simple, but the elastic sheet corrodes and service life is shortened
Solution Approach 1:
The TPV waterproof cover acts as a protective flexible shell that completely envelops the metal elastic sheet, isolating it from corrosive external moisture. This simple yet effective sealing approach significantly extends the service life of the elastic sheet without introducing complex sealing mechanisms.
Solution Approach 2:
The patent extracts the metal elastic sheet from direct exposure to the external environment by inserting it into the sealed waterproof cover. This separation protects the elastic sheet from corrosion while maintaining its functional elasticity, thereby extending its operational life.
3Shape
If the waterproof cover has uniform wall thickness, then manufacturing is simple, but the cover wrinkles and appearance is poor
Solution Approach 1:
The waterproof cover is designed with non-uniform wall thickness, where the top wall has greater thickness than the side walls. This local variation in thickness provides enhanced structural support at the top to prevent wrinkling and improve appearance, while the thinner side walls maintain flexibility and ease of manufacturing.
Data Source
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AI summary
This disclosure provides a sealed type windshield wiper structure (1). The carrying seat (20) is combined on the hooking seat (10). The carrying seat (20) includes a carrying board (21) and a carrying frame (22). The carrying board (21) includes a through slot (210), and the carrying frame (22) includes an accommodating slot (220). The elastic piece (30) is inserted in the through slot (210). The waterproof cover (40) includes a shell (41), an inner space (32) and an outer space (43) The carrying seat (20) is inserted in the inner space (42). The rubber wiper (50) includes a piercing strip (51) and a scraping strip (52). The piercing strip (51) is inserted in the outer space (43), and the scraping strip (52) is exposed from the waterproof cover (40) to configure the sealed type windshield wiper structure (1).