Sealed Windshield Wiper Structure for Moisture Isolation
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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 and causes loss of elastic force, especially in icy environments.
Innovation Solution
A sealed type windshield wiper structure is designed with a waterproof cover and end plugs to isolate the elastic piece from external moisture, using a thermoplastic vulcanization (TPV) material for the cover that maintains strength and flexibility, and includes a carrying seat with a through slot for the elastic piece, ensuring the elastic force is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional non-sealed wiper structure is used, then the structure is simple and easy to manufacture, but rainwater penetrates into the wiper cover and corrodes the metal elastic sheet, shortening service life
Solution Approach 1:
The patent applies a waterproof cover made of thermoplastic vulcanization (TPV) material that forms a flexible sealed enclosure around the metal elastic sheet. This flexible shell prevents rainwater penetration while maintaining the necessary flexibility for the wiper's operational movements, thereby protecting the metal elastic sheet from corrosion without requiring complex rigid sealing structures.
Solution Approach 2:
The patent uses TPV (thermoplastic vulcanization) composite material for the waterproof cover, which combines the properties of thermoplastics and rubbers. This composite material provides both the sealing capability to prevent water ingress and the flexibility needed for wiper operation, resolving the contradiction between reliability and structural simplicity.
2Strength
If the waterproof cover is made thin for flexibility, then the appearance is smooth without wrinkling, but the structural strength may be insufficient
Solution Approach 1:
The TPV composite material inherently provides high strength-to-thickness ratio, allowing the waterproof cover to be made thin for smooth appearance while maintaining sufficient structural strength through the material's inherent properties rather than increasing thickness.
Solution Approach 2:
The patent implements varying wall thicknesses in different regions of the waterproof cover, with thicker sections at high-stress areas and thinner sections where flexibility and smooth appearance are prioritized. This local quality variation optimizes both strength and appearance without unnecessary material usage.
Data Source
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).