Casing Position-Limiting Structures for Vibration Noise Reduction

Solution Overview

Problem

Electronic devices with integrated display and sound generating functions experience abnormal sounds due to mechanical vibration of their casings, which need to be mitigated.

Innovation Solution

The electronic device incorporates a first casing with a first and second position-limiting structure, and a second casing with a protruding structure that fits into a position-limiting groove, ensuring the casings stabilize relative to each other through structural interference, reducing vibration-induced collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If the electronic device uses a sound generating assembly, then sound generation function is provided, but mechanical vibration causes abnormal sound

Engineering Contradiction:

Improveabnormal soundVSAvoidsound generation function

Core Design Contradiction:

Object-generated harmful factorsVSPower

Solution Approach 1:

The position-limiting structures are pre-installed on the first and second casings before assembly. These structures preliminarily constrain the relative position of the casings to prevent vibration-induced collisions during sound generation, thereby reducing abnormal sounds while maintaining sound output function

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The position-limiting structures act as intermediary elements between the first casing and second casing. They mediate the interaction between the two casings by providing controlled contact points that prevent excessive relative movement and collision, thus eliminating abnormal sounds caused by direct casing collisions

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the first casing and second casing are assembled together, then the electronic device structure is formed, but vibration causes collision between casings

Engineering Contradiction:

Improvecasing stabilityVSAvoidabnormal sound from collision

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The position-limiting structures are pre-installed on the first and second casings before assembly. These structures preliminarily constrain the relative position of the casings to prevent vibration-induced collisions during sound generation, thereby reducing abnormal sounds while maintaining sound output function

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The position-limiting structures act as intermediary elements between the first casing and second casing. They mediate the interaction between the two casings by providing controlled contact points that prevent excessive relative movement and collision, thus eliminating abnormal sounds caused by direct casing collisions

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12324108B2Electronic device

Publication Date: 2025.06.03 INNOLUX CORP

AI summary

An electronic device including a first casing and a second casing is provided. The first casing includes a first plate portion, a first position-limiting structure and a second position-limiting structure. The first position-limiting structure and an inner surface of the first plate portion form a position-limiting groove. The second position-limiting structure is disposed on the inner surface of the first plate portion. The second casing includes a protruding structure. The protruding structure is inserted in the position-limiting groove, and the first position-limiting structure and the second position-limiting structure abut two opposite sides of the protruding structure.