Electronic Device Sealing via Adhesive Compression
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Solution Overview
Problem
Existing electronic devices face challenges in achieving a sealed joint between connector terminals and housings, especially in water-immersion applications, and the assembly process is costly and not waterproof, with ultrasonic welding not providing reliable sealing and requiring same material for components.
Innovation Solution
A sealing system using apertures within an internal housing with an adhesive applied to both surfaces, where the external housing presses the component's perimeter onto the ledge of the apertures, creating a sealed assembly with a VHB adhesive for reliable sealing across various temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ultrasonic welding is used to assemble connector terminal with housing, then the assembly process is completed, but the joint is not sealed and additional gaskets are required
Solution Approach 1:
A sealing ring is introduced as an intermediary element between the connector terminal and housing. The sealing ring is made of elastomeric material that can be compressed to create a water-tight seal, eliminating the need for gaskets while ensuring reliable sealing in water-immersion applications
2Strength
If welding joints are used to assemble connector terminal with housing, then the assembly is firm, but the process is costly and requires same material for components
Solution Approach 1:
The welding process is replaced with a mechanical compression system. The connector terminal is compressed against the housing using a compression member and spring, creating a firm mechanical bond without requiring welding. This eliminates material restrictions and reduces manufacturing costs while maintaining assembly firmness
3Ease of manufacture
If lens is press fitted with electronic device, then the assembly is simple, but the assembly is not waterproof
Solution Approach 1:
A flexible sealing ring made of elastomeric material is introduced between the lens and housing. The sealing ring can be compressed to conform to the lens surface, creating a water-tight seal that maintains assembly simplicity while providing waterproof capability
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
The method provides a waterproof and reliable sealing system for electronic device components, ensuring the assembly is integral and environmentally sealed, reducing mechanical area while maximizing internal space for printed circuit boards, and is effective across a wide temperature range.
Implementation Method 1
an adhesive adhered on a first surface to a ledge of the one or more apertures and adhered on a second surface to a perimeter of the component
Data Source
AI summary
A sealing system for sealing a component (102) within an electronic device (100) is provided. The system includes one or more apertures (206) within an internal housing (202). Further the system includes an adhesive (602), adhered on a first surface to a ledge (502) and bottom perimeter surface 402 of the component. Furthermore, the system includes an external housing (204). The external housing presses the perimeter of the component onto the ledge.