Mobile Terminal Keypad Water-Resistant Blade Integration
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Solution Overview
Problem
Conventional industrial PDAs face challenges in preventing water and moisture from entering the keypad area due to the lack of a simple and uncomplicated water-resistant structure, which complicates manufacturing and assembly, increasing production costs.
Innovation Solution
A mobile terminal design featuring a front case with a keypad-accommodating portion, a rear case, and a water-resistant blade system, where the water-resistant blade is inserted into a blade-insertion rail, combined with a flexible keypad and water-resistant caps for power and reset keys, and a water-resistant rubber sealing the cases, ensuring protection against water and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-resistant structure is added to prevent water from entering the keypad area, then water resistance is improved, but device complexity increases
Solution Approach 1:
The patent combines the water-resistant blade and the keypad support structure into a single integrated component. The blade is formed as an extension of the support structure, eliminating the need for separate water-resistant components while maintaining effective water protection for the keypad area.
Solution Approach 2:
The support structure serves multiple functions: it supports the keypad, provides structural stability, and acts as a water-resistant barrier through the integrated blade. This multi-functionality reduces the overall number of components needed in the device.
2Reliability
If a complicated water-resistant structure is implemented, then water resistance is improved, but ease of manufacture deteriorates
Solution Approach 1:
By integrating the water-resistant blade with the support structure, the patent reduces the number of parts that need to be manufactured and assembled. This simplification makes the manufacturing process easier and more cost-effective while maintaining water resistance.
Solution Approach 2:
The blade is designed with a specific segmentation that allows it to be easily formed as part of the support structure. The blade extends from the support structure and includes positioning features that facilitate simple assembly with the keypad and housing.
3Reliability
If a complicated water-resistant structure is implemented, then water resistance is improved, but production cost increases
Solution Approach 1:
The integration of the water-resistant blade with the support structure reduces component count and assembly steps, leading to lower production costs. The simplified structure requires fewer manufacturing operations and less assembly time.
Solution Approach 2:
The integrated blade structure can be manufactured using cost-effective molding techniques as part of the support structure component, avoiding the need for expensive separate water-resistant components and complex assembly processes.
Data Source
AI summary
Disclosed is a mobile terminal. The mobile terminal of the present invention comprises: a front case having a keypad-accommodating portion; a rear case attachably/detachably coupled to a rear surface of the front case such that a component-accommodating space, in which a main PCB is arranged, is interposed between the front case and the rear case; and a keypad which has a plurality of key buttons, and which is made of a flexible material, and which is accommodated in the keypad-accommodating portion of the front case. The keypad has an edge on which a water-resistant blade extends toward the keypad-accommodating portion. The keypad-accommodating portion has a bottom surface on which a blade insertion rain is formed to enable a portion of the water-resistant blade to be inserted into the rail. The mobile terminal of the present invention has a simple structure to enable easy manufacture and assembly, and in particular prevents water or moisture from entering a keypad area.