Waterproof Element With Dual Adhesion Layers For Detachable Electronic Device Covers
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Solution Overview
Problem
Existing electronic devices with detachable waterproof covers face challenges in achieving high waterproof performance, as simply adding waterproof elements like foam or elastic bodies may not suffice for stringent waterproof demands, and repeated assembly/disassembly can damage the waterproof elements due to excessive adhesion strength.
Innovation Solution
The use of a waterproof element comprising a double-sided tape with distinct adhesive layers and an elastic body, where the first adhesive layer allows for repeated adhesion and peeling without damaging the element, ensuring a close fit between the cover and casing while allowing for easy disassembly and replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof element with strong adhesion is used to ensure waterproof performance, then the waterproof performance is improved, but the waterproof element is damaged during repeated assembly/disassembly
Solution Approach 1:
The adhesive layer is segmented into multiple functional zones: a first adhesive layer with lower adhesion strength for repeated assembly/disassembly, and a second adhesive layer with higher adhesion strength for maintaining waterproof seal. This segmentation allows different regions to serve different functions, resolving the contradiction between ease of assembly and waterproof durability.
Solution Approach 2:
Different regions of the adhesive layer are assigned different adhesion strengths. The first adhesive layer has lower strength to allow repeated assembly/disassembly without damage, while the second adhesive layer has higher strength to ensure waterproof performance. This local differentiation of properties resolves the contradiction between ease of assembly and waterproof reliability.
2Adaptability or versatility
If a detachable cover is provided to enable component replacement, then the expandability and replaceability are improved, but the waterproof function is compromised
Solution Approach 1:
The adhesive layer is divided into multiple layers with different adhesion characteristics. The first adhesive layer enables repeated assembly and disassembly for component replacement, while the second adhesive layer maintains the waterproof seal. This segmentation allows the cover to be detachable while preserving waterproof functionality.
Solution Approach 2:
The adhesive layer uses a composite structure combining two different adhesive materials with different strength characteristics. This composite adhesive layer simultaneously provides the flexibility needed for repeated assembly/disassembly and the strength needed for waterproof sealing, resolving the contradiction between adaptability and waterproof reliability.
3Reliability
If the adhesion strength is increased to prevent cover detachment, then the sealing reliability is improved, but the ease of assembly and disassembly is reduced
Solution Approach 1:
The adhesive layer is segmented into a first adhesive layer with lower strength for easy assembly/disassembly and a second adhesive layer with higher strength for sealing reliability. This segmentation allows the cover to be easily assembled and disassembled while maintaining reliable sealing, resolving the contradiction between ease of operation and sealing reliability.
Solution Approach 2:
Different regions of the adhesive layer have different adhesion strengths tailored to their specific functions. The first adhesive layer provides ease of assembly, while the second adhesive layer provides sealing reliability. This local quality differentiation resolves the contradiction between operational ease and sealing 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 enhances waterproof performance by maintaining a seamless seal during operation and allows for repeated assembly/disassembly without damaging the waterproof element, prolonging the service life and reducing the need for frequent replacements.
Implementation Method 1
The elastic body is adhered to the second adhesive layer, and the elastic body is tightly fitted to the cover or the casing repeatedly through the first adhesive layer
Implementation Method 2
The double-sided tape comprises a first substrate, a first adhesive layer, and a second adhesive layer, wherein the first adhesive layer and the second adhesive layer are coated on two opposite surfaces of the first substrate
Implementation Method 3
The casing has a close-fit structure, and the close-fit structure is adapted to press the elastic body
Data Source
AI summary
An electronic device includes a casing, a cover, and a waterproof element. The casing has an opening. The cover is covered and assembled at the opening. The waterproof element includes a double-sided tape and an elastic body. The double-sided tape includes a first substrate, a first adhesive layer, and a second adhesive layer. The first adhesive layer and the second adhesive layer are coated on two opposite surfaces of the first substrate, respectively. The elastic body is fixed on the casing or the cover, adhered to the second adhesive layer, and tightly fitted to the cover or the casing repeatedly through the first adhesive layer.