Mobile Terminal Trigger Unit Waterproofing Design
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Solution Overview
Problem
Industrial PDAs require a waterproof function to withstand harsh environments, but existing designs complicate manufacturing and assembly due to vulnerabilities in parts like keypads, touch windows, and battery packs.
Innovation Solution
A mobile terminal design featuring a trigger unit with a trigger switch, trigger rubber, and trigger bracket for user input, a battery pack with a cushion for hermetic sealing, keypad silicon with a flexible material, and a sealing rubber between case components, along with a touch window and screw cap for enhanced waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waterproof structures are added to keypads, touch windows, and battery packs, then waterproof function is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent integrates the trigger switch directly into the rear case structure, eliminating the need for separate waterproof structures. The trigger switch is positioned to be actuated through the rear case opening, and the cushion material provides waterproof sealing without requiring additional waterproof components for the trigger mechanism itself.
Solution Approach 2:
The patent removes the trigger switch from the traditional keypad area and relocates it to the rear case, extracting it from the complex waterproof assembly requirements of the front interface. This allows the trigger function to be implemented with simpler waterproofing measures.
2Reliability
If waterproof processes are applied to coupling portions and battery packs, then waterproof function is improved, but manufacturing and assembly difficulty increase
Solution Approach 1:
The patent changes the physical state of the cushion material from solid to compressed/deformed state during assembly. The cushion is inserted in a compressed state and then deforms to fill gaps and create waterproof seals, eliminating the need for complex waterproof coating processes or gasket installations.
Solution Approach 2:
The cushion material performs dual functions: mechanical cushioning and waterproof sealing. By using the deformable properties of the cushion material itself, the patent achieves waterproofing without requiring separate waterproofing processes or components, simplifying both manufacturing and assembly.
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 and assembly while providing superior waterproofing, protecting against environmental factors like snow and rain, and ensuring durability for industrial use.
Implementation Method 1
a cushion interposed between the battery pack and the rear surface case and hermetically maintaining a coupling portion of the battery pack and the rear surface case
Implementation Method 2
a trigger rubber which comes into close contact with the inside of the terminal case so as to cover the trigger switch
Data Source
AI summary
Disclosed is a mobile terminal. The mobile terminal of the present invention comprises: a terminal case including a front surface case and a rear surface case which are coupled together; and a trigger unit, which is provided so as to be exposed to the exterior of the terminal case for performing user input by means of a pulling movement, wherein the trigger unit further includes a trigger switch which is exposed to the exterior of the terminal case, a trigger rubber which comes into close contact with the inside of the terminal case so as to cover the trigger switch, and a trigger bracket which supports the trigger rubber by means of pressure and which is coupled to the inside of the terminal case. According to the present invention, provided are the mobile terminal and the method for manufacturing same, the mobile terminal having a superior waterproof function and which is easy to produce and assemble.