Waterproof Unit for Mobile Terminal SIM Tray Hole
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Solution Overview
Problem
Mobile terminals face challenges in effectively sealing and waterproofing the hole used for SIM tray input/output, leading to potential water ingress and reduced durability.
Innovation Solution
A mobile terminal design incorporating a waterproof unit with a rod, stopper, and packing ring, where the packing ring is elastic and larger in diameter than the hole, and the stopper has an inclined shape, along with a guide and connection portion, to securely seal the SIM tray hole and prevent water entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple hole structure is used for SIM tray input/output, then ease of manufacture is improved, but waterproofing capability deteriorates
Solution Approach 1:
The waterproof unit is divided into multiple functional segments: a rod for positioning, a stopper for sealing, and a packing ring for waterproofing. This segmentation allows each component to perform its specific function effectively while maintaining ease of assembly and manufacture.
Solution Approach 2:
The waterproof unit acts as an intermediary component inserted into the hole to provide waterproofing capability. The packing ring, in particular, serves as a mediator between the hole structure and the external environment, preventing water ingress while allowing the simple hole structure to remain.
2Reliability
If a waterproof unit with elastic packing ring is used, then waterproofing capability is improved, but device complexity increases
Solution Approach 1:
The packing ring is designed as an elastic flexible component that can deform to seal the hole effectively. This flexible shell approach provides reliable waterproofing while keeping the structure simple and the number of components minimal.
Solution Approach 2:
The elastic properties of the packing ring allow it to change its dimensional parameters (diameter, cross-section) dynamically during installation and operation, enabling effective sealing adapt to the hole dimensions without requiring precise manufacturing tolerances.
3Reliability
If the packing ring has diameter greater than the hole, then waterproofing capability is improved, but ease of operation deteriorates
Solution Approach 1:
The packing ring is designed to be elastic and movable during installation, allowing it to be compressed to fit through the hole and then expand to provide sealing. This dynamic behavior enables easy installation despite the ring's diameter being larger than the hole.
Solution Approach 2:
The inclined shape of the stopper performs preliminary action by guiding the waterproof unit into the correct position during installation, making the operation easier despite the packing ring's larger diameter.
4Reliability
If the stopper has inclined shape, then waterproofing capability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The stopper features an asymmetric inclined shape that provides effective sealing and guidance functionality. This asymmetric design improves waterproofing capability by ensuring proper positioning and contact with the hole edges, while the inclination angle can be optimized to balance manufacturing precision requirements.
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 solution effectively seals the SIM tray hole, enhancing the waterproofing and durability of the mobile terminal while suppressing rotation of the sealing pin, ensuring reliable operation in wet conditions.
Implementation Method 1
the packing ring may have a diameter greater than a diameter of the body hole, and the packing ring may have elasticity
Data Source
AI summary
A mobile terminal is disclosed. The mobile terminal includes a body; a body hole formed in the body, the body hole communicating an inside and an outside of the body; and a waterproof unit positioned and movable in the body hole, the waterproof unit including: a rod extended in a communicating direction of the body hole; a stopper connected to an end of the rod, a portion of the stopper having a inclined shape with respect to a longitudinal direction of the rod; and a packing ring surrounding the rod, the packing ring sealing the body hole.