Through-Hole Structure for Waterproof LED Display Maintenance
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Solution Overview
Problem
Outdoor front maintenance LED display screen modules face damage and moisture ingress due to gaps in the through-hole structure when maintaining thin PCB boards with closely packed lamp beads, compromising waterproofing.
Innovation Solution
A through-hole structure with a step design featuring a convex portion and groove, where a sealant layer is applied between the PCB board and the convex portion, and the groove, along with an arc structure and notches, to prevent moisture entry, even if cracks or gaps occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a through-hole structure is provided for front maintenance, then maintenance accessibility is improved, but waterproof performance deteriorates due to gaps in the structure
Solution Approach 1:
The through-hole structure is segmented into multiple components: a through-hole body, a convex portion extending from it, and a groove surrounding the convex portion. This segmentation allows each component to serve specific functions - the through-hole body provides maintenance access, while the convex portion and groove create sealing surfaces that prevent moisture ingress, thus resolving the contradiction between accessibility and waterproofing.
Solution Approach 2:
A sealant layer is introduced as an intermediary substance between the convex portion and the groove/PCB board. This sealant fills the gaps and cracks that would otherwise allow moisture penetration, enabling the through-hole structure to maintain both its maintenance accessibility function and its waterproof integrity simultaneously.
2Ease of operation
If the through-hole structure passes through a thin PCB board with closely packed lamp beads, then maintenance access is achieved, but the PCB board becomes vulnerable to damage
Solution Approach 1:
The through-hole structure is divided into a through-hole body and a separate convex portion. This segmentation allows the convex portion to bear the mechanical loads and protective functions, while the through-hole body maintains the access function, thereby protecting the thin PCB board from damage during maintenance operations.
Solution Approach 2:
The convex portion acts as a protective cushion or buffer that absorbs mechanical stresses and prevents direct contact between maintenance tools and the fragile PCB board with closely packed lamp beads. This prior cushioning effect protects the PCB board from damage before actual maintenance operations occur.
3Reliability
If a closed structure is used for the through-hole, then waterproofing is improved, but maintenance operation space is insufficient
Solution Approach 1:
The structure is segmented into a through-hole body providing open access space and a convex portion with groove providing sealing surfaces. This segmentation creates a hybrid structure that combines the advantages of both open and closed structures - sufficient maintenance operation space from the through-hole body and effective waterproofing from the convex portion and groove sealant assembly.
Data Source
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AI summary
The present disclosure provides a front maintenance display screen module, including: a bottom case (1), a PCB (2) provided on the bottom case, and a through-hole structure (4) penetrating the bottom case and the PCB. The through-hole structure includes a step structure at one end of the through hole structure near the PCB, and the step structure includes a convex portion (41) and a step portion. The convex portion is configured to penetrate the PCB, a gap is provided between the convex portion and the PCB. The step portion includes a groove surrounding the convex portion. A side of the PCB near the bottom case is abutted against an edge of the groove. A sealant layer (5) is provided in the gap and the groove.