Pivoting Waterproof Casing with Adhesive Seals
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Solution Overview
Problem
Conventional electronic devices with pivotally connected case bodies and covers allow moisture and dust to enter through a 0.3 mm clearance, compromising the electrostatic discharge (ESD) test and damaging internal components.
Innovation Solution
A waterproof casing structure featuring a case body with a recess, water collecting sump, and abutting protrusions, and a cover with inner and side stops made of waterproof adhesive, which prevent moisture and dust from entering when the cover pivots to cover the recess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is pivotally mounted on the case body to allow the cover to pivot relative to the case body, then the ease of operation is improved, but moisture and dust inevitably enter the case body through the clearance
Solution Approach 1:
A waterproof adhesive is introduced as an intermediary substance between the cover and case body at the pivot connection. The adhesive fills the clearance gap while allowing the cover to pivot, thereby mediating between the need for movement and the need for sealing against moisture and dust
Solution Approach 2:
The waterproof adhesive acts as a flexible sealing film that accommodates the pivoting motion of the cover while maintaining the seal. The adhesive's flexibility allows it to deform with the cover's movement rather than cracking or breaking the seal
2Ease of operation
If a clearance of about 0.3 millimeter is reserved between the pivot edge of the cover and the case body to allow the cover to pivot, then the ease of operation is improved, but the reliability deteriorates due to moisture and dust damage
Solution Approach 1:
The waterproof adhesive serves as a mediator that eliminates the harmful clearance gap while preserving the pivoting function. It fills the 0.3mm clearance completely, creating a sealed path that prevents moisture and dust ingress without restricting cover movement
Solution Approach 2:
The invention changes the physical state and distribution of the sealing interface by applying waterproof adhesive. This transforms the clearance from a continuous gap into a sealed interface, fundamentally changing the protection parameter while maintaining operational flexibility
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
Effectively seals the gap between the pivot edge and case body, preventing moisture and dust ingress and ensuring the device passes the ESD test.
Implementation Method 1
two abutting protrusions respectively formed on two opposite inner sidewalls of the case body... the inner stop and the side stops prevent moisture and dust from entering the case body from a clearance formed between a pivot edge of the outer shell and the water collecting side surface of the case body
Data Source
AI summary
A waterproof structure of a casing has a case body and a cover pivotally mounted on the case body. The case body has a recess, a water collecting sump defined in the recess and two abutting protrusions respectively formed on two opposite inner sidewalls of the case body. The cover has an outer shell, and an inner stop and two side stops formed on an inner surface of the outer shell. When the cover pivots to cover the recess of the case body, the inner stop and the side stops prevent moisture and dust from entering the case body from a clearance formed between a pivot edge of the outer shell and the water collecting side surface of the case body.