Water-Resistant Electronic Component Sealing Sheet Design
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Solution Overview
Problem
Conventional water-resistant electronic components with insert-molded structures are limited in applicability and require time-consuming manufacturing processes, making them unsuitable for a wide range of components with non-insert-molded terminals and increasing manufacturing effort due to the use of double-sided adhesive tapes for sealing.
Innovation Solution
A water-resistant electronic component design featuring a body with a loop-shaped water-resisting wall, a sealing sheet, and a cover, where the sealing sheet covers the protectable part and the cover fixes over the sheet and wall, with grooves and water-retaining holes to enhance water resistance through capillary action and liquid collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If double-sided adhesive tapes are used as sealing parts in conventional water-resistant electronic components, then water resistance is achieved, but the adhesive adhesiveness makes it difficult to insert terminals into retaining holes
Solution Approach 1:
The sealing part is divided into two functional zones: a non-adhesive peripheral portion that contacts the retaining hole wall to enable easy terminal insertion, and an adhesive internal portion that seals the gap between the terminal and body. This segmentation resolves the contradiction by separating the insertion function from the sealing function.
Solution Approach 2:
Different regions of the sealing part are given different adhesive properties: the peripheral region has low or no adhesiveness to facilitate terminal insertion, while the internal region has high adhesiveness to ensure water resistance. This local differentiation of material properties solves the contradiction between ease of insertion and water resistance.
2Reliability
If insert molding is used to create water-resistant structures, then water resistance is achieved, but the method cannot be applied to electronic components with non-insert-molded terminals
Solution Approach 1:
The sealing part is designed as a universal component that can be applied to various terminal types (insert-molded, retained in holes, pressed-fit) and component structures. The sealing part universally provides both insertion facilitation and water resistance functions across different electronic component configurations.
Solution Approach 2:
The sealing part acts as an intermediary element between the terminal and the body, providing a standardized interface that works with different terminal types. Instead of requiring different manufacturing methods for different terminals, the sealing part serves as a universal mediator that achieves water resistance across all terminal types.
3Reliability
If sealing parts are wound around each terminal individually, then water resistance is achieved, but extra time and effort are required for manufacturing
Solution Approach 1:
Multiple sealing functions are merged into a single integrated sealing part that simultaneously seals multiple terminals. Instead of winding separate sealing parts around each terminal, one consolidated sealing part with multiple peripheral portions seals all terminals in a single operation, significantly improving manufacturing efficiency.
Solution Approach 2:
The sealing part is pre-formed with the appropriate structure, adhesive zones, and peripheral portions before assembly. This preliminary preparation eliminates the need for time-consuming individual winding operations during final assembly, as the sealing part is ready to be installed as a complete unit.
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 design simplifies manufacturing, increases applicability to various components, and significantly improves water resistance by reducing the likelihood of liquid entering the internal components, with the sealing sheet and cover configuration effectively managing external fluids and adhering substances.
Implementation Method 1
The at least one groove is configured such that liquid may move along the outer face of the cover and enter the at least one groove
Implementation Method 2
The sealing parts are double-sided adhesive tapes respectively wound around the intermediate portions of the terminals
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A water-resistant electronic component providing a water-resistant structure that can be readily manufactured and applicable to a wide range of components and devices to be made water-resistant. A water-resistant electronic component C includes a body 100, a protectable part S, a sealing sheet 200, and a cover 300. The body 100 includes a loop-shaped water-resisting wall 120 extending in the Z-Z' direction. The protectable part S includes at least part of the functional part 400 of the electronic component C and is located within the water-resisting wall 120 of the body 100. The sealing sheet 200 includes a perimeter portion 210. With the perimeter portion 210 of the sealing sheet 200 abutting the water-resisting wall 120 from the Z direction, the sealing sheet 200 covers the protectable part S from the Z-direction side. The cover 300 is fixed to the body 100 such as to cover the sealing sheet 200 and the water-resisting wall 120 from the Z-direction side.