Terminal Interface Sealing Structure for Low-Cost IPX7 Waterproofing
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Solution Overview
Problem
Existing terminal devices with high waterproof and sealing levels, such as IPX7, incur high manufacturing costs due to enhanced waterproof and sealing designs on exposed components, making it difficult to control production costs.
Innovation Solution
A terminal device design featuring an isolation groove in the housing with a sealed interface component, allowing for a separate assembly space and using a sealing kit to isolate the interface component, reducing the need for waterproof components and lowering costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interface component is directly mounted on the circuit board, then the assembly is simple, but the waterproof performance cannot reach IPX7 level
Solution Approach 1:
The housing is segmented into a first housing and a second housing, with an isolation groove formed in the inner wall of the first housing. This segmentation creates a separate isolation space that isolates the interface component from the circuit board, enabling independent waterproof treatment of each component while maintaining overall IPX7 waterproof performance.
Solution Approach 2:
A sealing kit is introduced as an intermediary element between the interface component and the housing. The sealing kit includes a sealing plate and sealing adhesive, which together form an effective sealing barrier. This intermediary sealing structure allows the interface component to be non-waterproof while still achieving IPX7 waterproof performance for the entire device.
2Reliability
If waterproof components are used throughout the terminal, then the waterproof level reaches IPX7, but the manufacturing cost increases
Solution Approach 1:
Instead of making all components waterproof, the patent applies waterproof treatment locally and selectively. The sealing kit is specifically applied at the isolation groove where the interface component meets the housing, creating a localized waterproof barrier. This allows the use of inexpensive non-waterproof interface components while maintaining overall IPX7 waterproof performance, significantly reducing manufacturing costs.
Solution Approach 2:
The patent uses a cost-effective sealing solution consisting of a sealing plate and sealing adhesive in the isolation groove, rather than investing in expensive waterproof interface components. This economical sealing approach achieves the same waterproof effect as expensive waterproof components, reducing the overall manufacturing cost while maintaining IPX7 waterproof level.
3Reliability
If a sealing kit is introduced to seal the interface component, then waterproof performance improves, but the device complexity increases
Solution Approach 1:
The sealing plate and sealing adhesive are merged into a unified sealing kit that works together as an integrated sealing system. The sealing plate provides the primary sealing barrier, while the sealing adhesive reinforces the seal and ensures reliable adhesion. This merged sealing approach achieves effective waterproofing without requiring multiple separate complex components.
Data Source
AI summary
A terminal device includes a housing, a circuit board, and an interface component. An isolation groove is formed in an inner wall of the housing. The isolation groove has a first opening, and the first opening is exposed to the housing. The interface component is sealed in the isolation groove through a sealing kit. The interface component is electrically connected to the circuit board, and an interface end of the interface component is exposed to the first opening. Due to isolation of the sealing kit in the isolation groove, it is difficult for liquid to overflow to the circuit board through the isolation groove, to implement a good waterproof effect of the terminal device.