Waterproof microspeaker

Patent metadata

Field	Value
Publication number	US-12267659-B2
Application number	US-202318136962-A
Country	US
Kind code	B2
Filing date	Apr 20, 2023
Priority date	Apr 27, 2022
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A waterproof microspeaker includes: a frame; a magnetic circuit provided below the frame and including a yoke, inner and outer magnets, and a top plate; a voice coil located between the magnets and configured to vibrate by a magnetic field of the magnetic circuit and mutual electromagnetic force when an electric signal is applied; and a diaphragm housing provided above the frame. The diaphragm housing includes: a sidewall portion provided above the frame and having a predetermined height; an edge dome portion protruding upwardly or downwardly along an inner circumference of the sidewall portion; and a diaphragm provided inside the edge dome, allowing an upper end of the voice coil to be fixed thereto, and configured to generate sound by vibration of the voice coil. The diaphragm includes a polymeric material including metal or plastic and is inserted into an inner circumferential portion of the edge dome portion.

First claim

What is claimed is:

1. A waterproof microspeaker, comprising:
a frame;
a magnetic circuit provided below the frame and including a yoke, an inner magnet, an outer magnet, and a top plate;
a voice coil located between the inner magnet and the outer magnet and configured to vibrate by a magnetic field of the magnetic circuit and mutual electromagnetic force when an electric signal is applied; and
a diaphragm housing provided above the frame,
wherein the diaphragm housing includes:
a sidewall portion provided above the frame and having a predetermined height;
an edge dome portion protruding upwardly or downwardly along an inner circumference of the sidewall portion; and
a diaphragm provided inside the edge dome, allowing an upper end of the voice coil to be fixed thereto, and configured to generate sound by vibration of the voice coil,
wherein the diaphragm includes a polymeric material including metal or plastic.

2. The waterproof microspeaker of claim 1 , wherein the sidewall portion is formed of plastic material.

3. The waterproof microspeaker of claim 1 , wherein the diaphragm housing further includes a waterproof ring portion connected to the edge dome portion and protruding from an upper end of the sidewall portion.

4. The waterproof microspeaker of claim 3 , wherein the edge dome portion and the waterproof ring portion are integrally formed of silicon rubber.

5. The waterproof microspeaker of claim 1 , wherein the voice coil has a copper content of 15 to 100%.

6. The waterproof microspeaker of claim 1 , wherein the frame and the edge dome portion are configured such that portions of surfaces thereof facing in a vertical direction have the same shape.

7. The waterproof microspeaker of claim 1 , wherein the top plate and the diaphragm are configured such that portions of surfaces facing in a vertical direction have the same shape.

8. The waterproof microspeaker of claim 1 , wherein the diaphragm includes:
an edge portion inserted into the edge dome portion; and
a center portion protruding to be stepped upwardly or downwardly inside the edge portion.

9. The waterproof microspeaker of claim 8 , wherein the edge portion has an upwardly or downwardly concavo-convex shape in the whole or part of the portion inserted into the edge dome portion.

10. The waterproof microspeaker of claim 8 , wherein the edge portion has an upwardly or downwardly pocket-like shape in the whole or part of the portion inserted into the edge dome portion.

11. The waterproof microspeaker of claim 8 , wherein the edge portion has an upwardly or downwardly protruding shape in the whole or part of the portion inserted into the edge dome portion.

Assignees

• Em Tech Co Ltd

Inventors

• Kim Gang Tae
• Jeong Heung Woo
• Jeong Hyun Woo
• You Hyeon Sik

Classifications

• H04R1/021

  incorporating only one transducer · CPC title

• H04R13/00

  Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet · CPC title

• H04R7/127

  dome-shaped · CPC title

• H04R5/04

  Circuit arrangements, {e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments (combinations of amplifiers H03F3/68; stereophonic systems H04S)} · CPC title

• H04R2307/027

  Diaphragms comprising metallic materials · CPC title