Speaker Lower Clamping Plate for FPC Alignment and Debris Control

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Solution Overview

Problem

Existing speakers in mobile devices face issues with FPC alignment leading to larger holes and open rear cavities, resulting in debris accumulation and high manufacturing costs due to labor-intensive mold changes.

Innovation Solution

A speaker design with a lower clamping plate featuring rectangular through-holes and flanges that facilitate FPC alignment, breathable isolators covering these holes, and a frame structure that allows for easy assembly and acoustic performance adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If FPC alignment holes are made larger to accommodate FPC, then FPC alignment is easier, but the rear cavity becomes open and debris can enter

Engineering Contradiction:

ImproveFPC alignmentVSAvoiddebris accumulation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent uses breathable isolators that can be integrated into the FPC alignment holes. These isolators have porous structures that allow air permeability for acoustic function while blocking debris from entering the rear cavity, thus resolving the contradiction between easy FPC alignment and preventing debris accumulation.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The breathable isolator acts as an intermediary element placed in the FPC alignment hole. It mediates between the need for open alignment holes (for ease of operation) and the need to prevent debris entry, allowing air passage while blocking solid particles.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the shape of frame and lower clamping plate is changed to close rear cavity, then debris prevention is improved, but mold change becomes time-consuming and labor-intensive

Engineering Contradiction:

Improvedebris accumulationVSAvoidmold change

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent segments the solution into modular components: the frame, lower clamping plate, and separate breathable isolators. This allows the main structure to remain unchanged for easy manufacturing, while the breathable isolators can be independently designed and installed to close the rear cavity and prevent debris entry.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The breathable isolators are simple, inexpensive components that can be easily manufactured and installed. Rather than investing in complex mold changes, the patent uses these affordable isolators to achieve the desired debris prevention function.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-affected harmful factors

If breathable isolators are added to cover through-holes, then rear cavity can be closed to prevent debris, but device complexity increases

Engineering Contradiction:

Improvedebris accumulationVSAvoidstructure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The breathable isolators serve multiple functions simultaneously: they close the rear cavity to prevent debris entry, maintain acoustic pressure by allowing air permeability, and can be integrated into the existing FPC alignment structure. This multi-functionality reduces the need for additional separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Facilitates convenient FPC alignment, reduces manufacturing costs, and enhances acoustic performance by allowing precise damping control and quick adjustment.

Implementation Method 1

the speaker further comprising two breathable isolators fixed to the lower clamping body and covering each of the rectangular through-holes

Methodology Applied

Scientific EffectPhysical barrier (filtering): Filter (physical)

Implementation Method 2

the magnetic circuit system having a magnetic gap and driving the vibration system to vibrate and sound, and a flexible circuit board embedded in the bottom end of the frame; the vibration system and the magnetic circuit system are respectively fixed at both ends of the frame and collectively enclosed into a sound producing cavity; the vibration system includes a diaphragm fixed to the frame and a voice coil driving the diaphragm to vibrate and sound, with the voice coil inserted in the magnetic gap

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentUS12452601B2Speaker

Publication Date: 2025.10.21 AAC MICROTECH (CHANGZHOU) CO LTD

AI summary

The present disclosure discloses a speaker comprising a frame, a vibration system, a magnetic circuit system, and a flexible circuit board embedded in the bottom end of the frame; the vibration system and the magnetic circuit system are respectively fixed at both ends of the frame and collectively enclosed into a sound producing cavity; the magnetic circuit system comprising a lower clamping plate and a main magnet; the lower clamping plate comprising a lower clamping body, two rectangular through-holes and two first flanges; each first flange having a shape and size matching the corresponding rectangular through-hole; each of two first flaps spaced from the main magnet and forming the magnetic gap collectively; the speaker further comprising two breathable isolators fixed to the lower clamping body and covering each of the rectangular through-holes. FPC alignment installation is convenient, cost savings; the acoustic performance of the speaker is good.