Mobile Terminal Middle Frame with Non-Metallic Side Plates

Solution Overview

Problem

Conventional metallic middle frames in mobile terminals shield touch control signals, reducing their efficiency and accuracy, especially with larger screen sizes and the implementation of edge touch control.

Innovation Solution

A middle frame design incorporating non-metallic side plates and metallic baffles, or a combination of metallic and non-metallic portions, to minimize signal shielding and prevent static current interference, thereby enhancing touch control signal gathering efficiency and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a metallic middle frame is used to prevent static current interference, then the touch control assembly is protected from static current, but the touch control signal is shielded and the efficiency and accuracy of touch control signal gathering is reduced

Engineering Contradiction:

Improveprotection from static current interferenceVSAvoidtouch control signal gathering accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The middle frame is segmented into a metallic baffle portion and non-metallic side plate portions. The metallic baffle faces the battery to block static current, while the non-metallic side plates face the touch control assembly to avoid shielding touch control signals, thus resolving the contradiction between static current protection and touch signal accuracy

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the middle frame are made from different materials with different properties. The metallic baffle provides electrostatic shielding toward the battery, while the non-metallic side plates provide signal transparency toward the touch control assembly, allowing each local region to optimize its function

Inventive Principle:

Principle #3Local quality

2Reliability

If a metallic middle frame is used to prevent static current interference, then the touch control assembly is protected from static current, but the efficiency of touch control signal gathering is reduced

Engineering Contradiction:

Improveprotection from static current interferenceVSAvoidtouch control signal gathering efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The middle frame is segmented into a metallic baffle portion and non-metallic side plate portions. The metallic baffle faces the battery to block static current, while the non-metallic side plates face the touch control assembly to avoid shielding touch control signals, thus resolving the contradiction between static current protection and touch signal accuracy

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the middle frame are made from different materials with different properties. The metallic baffle provides electrostatic shielding toward the battery, while the non-metallic side plates provide signal transparency toward the touch control assembly, allowing each local region to optimize its function

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10129990B2Middle frame of mobile terminal and mobile terminal

Publication Date: 2018.11.13 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

The present disclosure relates to a mobile terminal and a middle frame of the mobile terminal. The middle frame includes: a metallic baffle having a first long side and a second long side; a first non-metallic side plate, a long side of the first non-metallic side plate connected to the first long side of the metallic baffle; and a second non-metallic side plate, a long side of the second non-metallic side plate connected to the second long side of the metallic baffle. The first non-metallic side plate and the second non-metallic side plate are positioned at a same face of the metallic baffle and are perpendicular to the same face of the metallic baffle.