Waterproof Ejection Mechanism for Card Connectors
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Solution Overview
Problem
Existing card connectors in mobile devices face challenges in achieving waterproof design due to the need for external access, which complicates sealing the small hole used for card insertion and retrieval.
Innovation Solution
A waterproof mechanism comprising a telescopic member, a thrusting member, and a sleeve, where the telescopic member has a retractable base with an opening, the thrusting member has a head and rod portion with specific diameters, and the sleeve forms a cavity, allowing a waterproof connection between the inner and outer surfaces using adhesive or elastic materials, ensuring sealed waterproofness without hindering card retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a small hole is provided in the cover plate for card insertion and retrieval, then the card connector allows external access for placing and taking electronic cards, but waterproof design becomes difficult to achieve
Solution Approach 1:
The opening is divided into two functional parts: an upper portion that remains sealed for waterproofing, and a lower portion that can be opened for card access. This segmentation allows the cover plate to maintain waterproof integrity while providing controlled external access through the retractable opening mechanism.
Solution Approach 2:
The opening is designed to be retractable rather than static, allowing it to dynamically transition between closed (waterproof) and open (accessible) states. This dynamic structure resolves the contradiction by providing external access only when needed, while maintaining waterproof sealing during normal operation.
2Reliability
If the opening is made retractable to enable waterproofing, then waterproof connection can be achieved between the inner wall surface and outer wall surface, but the structure becomes more complex with additional components
Solution Approach 1:
Multiple functions are merged into a single integrated assembly: the telescopic member provides both the retractable opening and structural support, the thrusting member combines pushing and sealing functions, and the sleeve integrates both structural and waterproof sealing roles. This merging reduces the number of separate components needed while achieving reliable waterproof connection.
Solution Approach 2:
Each component serves multiple functions: the telescopic member provides both structural support and opening/retraction functionality, the thrusting member performs both pushing cards and sealing operations, and the sleeve acts as both a structural element and waterproof barrier. This multi-functionality reduces overall system complexity despite the retractable design.
Data Source
AI summary
A waterproof mechanism includes a telescopic member; a thrusting member; and a sleeve. The telescopic member includes a retractable telescopic base, and an opening provided on an upper end of the telescopic base. The thrusting member includes a head portion and a rod portion having an outer diameter smaller than that of the head portion. The sleeve includes a cavity penetrating through both ends of the sleeve. The sleeve is sleeved on the rod portion of the thrusting member, a part of the thrusting member and a part of the sleeve are inserted into the opening of the telescopic base. The head portion of the thrusting member is held between the telescopic base and the sleeve, and an inner wall surface of an upper portion of the opening of the telescopic base and an outer wall surface of a lower portion of the sleeve are in a waterproof connection.