Bone Conduction Sound Output Device Mounting Structure

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Solution Overview

Problem

Current mobile terminals lack an effective structure for integrating a bone conduction sound output device without compromising the design, particularly in terms of sound discharge openings on the front surface, which limits design flexibility and mounting performance.

Innovation Solution

A mobile terminal design featuring a frame that supports a display unit and incorporates a bone conduction sound output device, where the sound output device is mounted on the frame using double-sided tape and assembly wings, with vibrations transmitted through bridge portions and damping pads to enhance mounting and performance, and includes a mechanism to prevent resonance and discharge air gaps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bone conduction sound output device is integrated into the mobile terminal, then sound transmission capability is improved, but mounting performance and structural stability deteriorate

Engineering Contradiction:

Improvesound transmission capabilityVSAvoidmounting performance

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The frame is divided into a body portion and a protruding portion that extends toward the display unit. The bone conduction sound output device is specifically mounted on this protruding portion, separating it from other components and providing a dedicated mounting structure that enhances both sound transmission and mounting stability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The frame protrudes in a direction toward the display unit, creating a new spatial dimension for mounting the sound output device. This dimensional extension allows the device to be positioned optimally for bone conduction transmission while maintaining structural stability through the protruding support structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the mobile terminal has no sound discharge opening on the front surface, then design flexibility is improved, but sound output performance deteriorates

Engineering Contradiction:

Improvedesign flexibilityVSAvoidsound output performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Instead of discharging sound through the front surface (conventional approach), the patent inverts the sound transmission path by using bone conduction to transmit vibrations directly through the frame structure to the user's skull. This eliminates the need for front surface sound discharge openings while maintaining sound output performance.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the conventional acoustic mechanical system (sound waves through air discharge openings) with a vibration-based mechanical system (bone conduction through frame vibrations). This substitution allows sound output without traditional discharge openings, improving design flexibility while maintaining performance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Volume of moving object

If the display unit overlaps the sound output device in the thickness direction, then space utilization is improved, but vibration transmission efficiency deteriorates

Engineering Contradiction:

Improvespace utilizationVSAvoidvibration transmission efficiency

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The frame is designed with a specific protruding portion that provides a localized mounting structure for the sound output device. This localized structural feature ensures optimal vibration transmission from the device through the frame to the user's skull, maintaining transmission efficiency despite the overlapping arrangement that improves space utilization.

Inventive Principle:

Principle #3Local quality

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

This design allows for effective sound transmission to the front surface without external sound discharge openings, improving the mounting and performance of the bone conduction sound output device while maintaining a compact and efficient layout, enhancing user experience and design flexibility.

Implementation Method 1

a sound output device configured to transmit sound using bone conduction vibrations, and connected to the frame so as to transmit the vibration to the display unit

Methodology Applied

Scientific EffectBone conduction: Vibration

Implementation Method 2

The sound output device may be attached to the frame by using a double-sided tape

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Implementation Method 3

a first damping pad may be mounted between the second frame and the sound output device

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentUS8848967B2Mobile terminal

Publication Date: 2014.09.30 LG ELECTRONICS INC

AI summary

A mobile terminal includes a body having a front surface and a rear surface; a display unit formed on the front surface of the body; a frame disposed between the front surface and the rear surface, and configured to support the display unit; and a sound output device configured to transmit sound using bone conduction vibrations, and connected to the frame so as to transmit the vibration to the display unit.