Waterproof Connector Insulation Design for USB Type-C
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Solution Overview
Problem
Conventional waterproof USB TYPE-C connectors are prone to short circuits due to liquid ingress before they can dry, as the shielding assembly is too close to the terminals, leading to electrical issues and potential overburning.
Innovation Solution
The design incorporates a dielectric body with terminal grooves and a shielding assembly that includes insulation elements such as glues or blocking boards, which create avoiding areas to prevent conductive paths between the shielding and terminals, ensuring insulation even when used in wet conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the shielding assembly is positioned close to the terminals to achieve compact design, then the connector volume is reduced, but liquid ingress causes short circuits between the shielding and terminals
Solution Approach 1:
An insulating element is introduced as an intermediary component between the shielding assembly and the terminals. This insulating element prevents direct contact and electrical conduction between the shielding and terminals, resolving the short circuit issue while allowing the shielding to remain positioned close to the terminals for compact design
Solution Approach 2:
The connector is segmented into distinct insulated zones: the terminals are separated from the shielding assembly by the insulating element. This segmentation creates electrical isolation between components that would otherwise be in close proximity or contact, preventing liquid-induced short circuits while maintaining compact overall dimensions
2Reliability
If multiple sealing rings are integrally molded to ensure waterproof function, then waterproof performance is improved, but the manufacturing process becomes more complex with multiple molding operations
Solution Approach 1:
Multiple sealing rings that would traditionally require separate molding operations are merged into a single integrated sealing structure. This unified sealing component maintains the waterproof function while simplifying the manufacturing process by reducing the number of molding operations and assembly steps required
Data Source
AI summary
A waterproof connector includes a dielectric body, a plurality of terminals integrally molded to the dielectric body, a shielding assembly, a metal shell surrounding outside the dielectric body, and a waterproof housing integrally molded outside the metal shell. The dielectric body has a tongue board. A periphery of a rear of the tongue board is recessed inward to form a limiting groove. A plurality of the blocking boards are protruded from the tongue board and located in front of the limiting groove. The shielding assembly is limited in the limiting groove. Outer surfaces of rear ends of contact portions of the plurality of the terminals adjacent to a front end of the shielding assembly are recessed inward to form a plurality of avoiding areas, each of the plurality of the avoiding areas is matched with one of the plurality of the blocking boards.