Electronic Device Seal Structure Controlling Sealant Inflow
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Solution Overview
Problem
The seal structure of electromagnetic relays faces challenges in restricting the flow of sealant into the housing, leading to variability and reduced reliability due to capillary phenomena, making it difficult to maintain airtightness.
Innovation Solution
A seal structure with a terminal groove and through hole configuration that includes a sealant restriction part, forming a placement area for the sealant to position it inside the housing, thereby controlling the sealant's inflow and reducing variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealant is used to seal the joint portion between base and case, then airtightness is ensured, but sealant may flow into the closed space through intervals between base and terminal due to capillary phenomenon
Solution Approach 1:
The base is segmented into multiple functional areas: terminal groove for accommodating terminal body, through hole for leg passage, and placement area for sealant. This segmentation creates distinct zones that control sealant flow paths and prevent unwanted infiltration into the closed space.
Solution Approach 2:
Different regions of the base are given different properties: the terminal groove provides accommodation for the terminal body, the through hole allows leg passage, and the placement area specifically contains sealant. Each region has a localized function that contributes to overall sealant control.
2Reliability
If terminal groove and through hole are provided in base, then terminal can be properly accommodated and sealed, but device complexity increases
Solution Approach 1:
The base structure integrates multiple functions into a single component: it provides mechanical support, accommodates terminals via terminal groove, allows leg passage through through hole, and controls sealant placement. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The terminal groove, through hole, and placement area are merged into a single integrated base structure. Instead of separate components for terminal accommodation and sealing, these functions are combined in one base element, simplifying assembly while maintaining reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively limits the sealant's variation within the housing, enhancing the reliability of the electronic device by restricting the sealant's inflow range and maintaining airtightness.
Implementation Method 1
the sealant may flow into the inside of the housing through an interval between the base and the terminal due to the capillary phenomenon or the like
Data Source
AI summary
A seal structure of an electronic device is provided with: a housing in which a base and a case are sealed by a sealant and a closed space enclosed by the base and the case is provided; and at least one of terminals having a body and a leg. The base includes a terminal groove that accommodates the body, a through hole that accommodates the leg, and a placement area forming part that forms a placement area for the sealant together with the body, the leg, the terminal groove, and the through hole, the placement area extending from the outside of the housing toward the closed space through an interval between the through hole and the leg and an interval between the terminal groove and the body.