Waterproof Casing Sealing via Extending Gasket Portion
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Solution Overview
Problem
Conventional waterproof casings for outdoor LED drivers with wireless communication functions face issues of poor tightness and mask detachment, allowing liquid to enter the casing.
Innovation Solution
A waterproof casing design featuring a housing, waterproof gasket, and end cover, where the gasket's extending portion hermetically covers the communication opening, and additional features like a platform and protrusion enhance sealing, preventing liquid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-metallic mask is attached to cover the communication opening, then waterproof capability is improved, but the mask may fall off easily and tightness is poor
Solution Approach 1:
The patent integrates the waterproof mask with the end cover by forming the mask as an extending portion of the end cover itself. This merging eliminates the separate attachment step and ensures the mask remains firmly integrated with the housing structure, resolving the issue of mask detachment while maintaining waterproof capability.
Solution Approach 2:
The extending portion of the waterproof mask is inserted into and nested within the communication opening of the end cover. This nested configuration ensures the mask is securely positioned and cannot fall off, while the inner edge of the communication opening provides a retention feature for the mask's extending portion.
2Reliability
If a non-metallic mask is attached to cover the communication opening, then waterproof capability is improved, but liquid may enter the gap between the mask and casing
Solution Approach 1:
The waterproof mask is designed as a flexible extending portion that can be molded to precisely fit the communication opening. This flexible structure allows the mask to conform to the opening's geometry and maintain continuous contact, eliminating gaps where liquid could penetrate while preserving the waterproof barrier.
Solution Approach 2:
Instead of attaching a separate mask to the outer surface of the end cover, the patent inverts the approach by integrating the mask as an extending portion that projects from the end cover into the communication opening. This inversion allows the mask to seal from the inside, preventing liquid from entering the gap between the mask and casing more effectively.
3Adaptability or versatility
If a communication opening is provided for wireless communication, then wireless function is enabled, but waterproof capability is compromised
Solution Approach 1:
The patent applies local quality by providing the communication opening only in the specific region where wireless communication is needed, while the rest of the end cover remains solid and waterproof. The extending portion of the waterproof mask is precisely positioned to cover only the communication opening area, allowing wireless signals to pass through while maintaining waterproof protection for the entire housing.
Data Source
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AI summary
A waterproof casing for packaging a circuit board having an antenna includes a housing, a waterproof gasket, and an end cover. The housing has an accommodation space and a side opening communicating with each other. The accommodation space is configured to accommodate the circuit board. The waterproof gasket includes a main body and an extending portion. The main body covers the side opening. The extending portion extends from the main body. The end cover abuts against a side of the main body away from the accommodation space, and is fixed to the housing to form a box with the housing. The box has a communication opening positioned corresponding to the antenna. The extending portion hermetically covers the communication opening.