Waterproof Frame Injection Port Layout for Low-Resistance Grounding
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Solution Overview
Problem
The increasing integration of components on circuit boards in electronic devices for miniaturization and improved wireless communication performance leads to space constraints and increased grounding resistance, hindering efficient utilization of internal space and waterproofing.
Innovation Solution
The electronic device incorporates a circuit board with substrate extensions overlapping the waterproofing member injection port, featuring a grounding pad and washer for reduced grounding resistance, and includes a frame with an antenna for enhanced wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the area of grounding circuit is increased to decrease ground resistance and increase ground current, then wireless communication performance is improved, but internal space occupied by circuit board increases
Solution Approach 1:
The circuit board is designed with an L-shaped configuration that extends in multiple directions from a central point, utilizing two-dimensional space more efficiently. The substrate extension protrudes from the main circuit board in a direction toward the waterproofing member injection port, allowing grounding circuits to be arranged in a distributed pattern across different spatial zones rather than concentrating them in one area, thus achieving adequate grounding area without excessive space occupation.
Solution Approach 2:
The substrate extension integrates multiple functional elements within a compact structure. The grounding pad is positioned on the substrate extension, and the waterproofing member injection port is arranged to overlap with the substrate extension area. This nested arrangement allows the grounding circuit, waterproofing structure, and component mounting areas to share overlapping spatial zones, reducing the total internal space required.
2Adaptability or versatility
If the number of components integrated onto circuit board is increased for improved functionality, then device functionality is enhanced, but placement space for internal components decreases
Solution Approach 1:
The circuit board is segmented into a main body and an extended substrate portion. The L-shaped configuration creates distinct functional zones: the main circuit board area for high-density component integration, and the substrate extension area for grounding circuits and waterproofing structures. This segmentation allows different types of components to be optimally distributed across separate regions, preventing spatial conflicts between high-density electronics and structural waterproofing elements.
Solution Approach 2:
The substrate extension utilizes available space in directions not occupied by the main circuit board, effectively adding functional capacity without increasing the primary footprint. By extending the circuit board substrate in an L-shape configuration, the design exploits underutilized spatial dimensions within the device housing, creating additional placement areas for grounding and waterproofing functions without encroaching on the space needed for main electronic components.
3Reliability
If injection port for liquid waterproofing material is added for waterproofing function, then waterproofing capability is achieved, but efficiency of utilizing internal space is hindered
Solution Approach 1:
The waterproofing member injection port is merged with the substrate extension structure. The injection port is positioned to overlap with the substrate extension area, allowing the waterproofing function to be integrated into the same spatial zone as the grounding circuit and substrate extension, rather than requiring a separate dedicated space. This merging of functions within overlapping spatial zones improves internal space utilization efficiency.
Solution Approach 2:
The substrate extension serves multiple functions simultaneously: it provides grounding circuit pathways, supports the waterproofing member injection port, and creates overlapping spatial zones with the main circuit board. By designing the substrate extension to fulfill multiple roles, the invention eliminates the need for separate dedicated spaces for each function, thereby improving overall internal space utilization efficiency while maintaining comprehensive waterproofing capability.
Data Source
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AI summary
An electronic device according to various embodiments of the present invention may comprise: a front plate disposed in a first direction; a rear plate positioned in parallel with the front plate; a frame coupled to the front plate and the rear plate between the front plate and the rear plate so as to form an inner space; and a waterproof member for sealing between the front plate and the frame. The frame includes a waterproof member inlet formed such that the waterproof member is injected into the front plate in the first direction, and the waterproof member inlet can have a stepped part, which forms a difference in height from the front plate with respect to the first direction at an entrance part of the waterproof member inlet, and a seating surface, which is provided on the upper surface of a portion having a low height.