Two-way speaker

Patent metadata

Field	Value
Publication number	US-12413896-B2
Application number	US-202318240137-A
Country	US
Kind code	B2
Filing date	Aug 30, 2023
Priority date	Aug 31, 2022
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A two-way speaker includes: a frame having a space for accommodating parts; a yoke partitioning the space of the frame vertically and having a lower surface and a side wall; a first speaker unit disposed below the yoke and having a magnet, a top plate, a voice coil, and a diaphragm; a protector disposed below the first speaker unit and protecting the diaphragm; a second speaker unit disposed above the yoke and having a magnetic circuit and a flexible-printed coil membrane (F-PCM) diaphragm having a coil pattern formed on a polymer film; and a sound emission yoke attached to an upper surface of the second speaker unit.

First claim

What is claimed is:

1. A two-way speaker, comprising:
a frame having a space for accommodating parts;
a yoke partitioning the space of the frame vertically and having a lower surface and a side wall;
a first speaker unit disposed below the yoke and having a magnet, a top plate, a voice coil, and a diaphragm;
a protector disposed below the first speaker unit and protecting the diaphragm;
a second speaker unit disposed above the yoke and having a magnetic circuit and a flexible-printed coil membrane (F-PCM) diaphragm having a coil pattern formed on a polymer film; and
a sound emission yoke attached to an upper surface of the second speaker unit.

2. The two-way speaker of claim 1 , wherein the frame has a groove portion that forms a duct for guiding sound from the first speaker unit toward the sound emission yoke, on an inner circumferential surface of the side wall of the frame.

3. The two-way speaker of claim 2 , wherein the sound emission yoke includes a first sound emission hole for emitting sound transferred from the first speaker unit and a second sound emission hole for emitting sound generated by the second speaker unit.

4. The two-way speaker of claim 1 , wherein the frame has an atmospheric pressure equalization hole on a side of the frame to reduce a difference in atmospheric pressure between upper and lower sides of the diaphragm.

5. The two-way speaker of claim 1 ,
wherein the magnetic circuit of the second speaker unit comprises: a lower magnet including a lower center magnet attached to a center of an upper surface of the yoke and a lower side magnet having a ring shape and disposed to be spaced apart from the lower center magnet; and an upper magnet including an upper center magnet attached to a center of a lower surface of the sound emission yoke and an upper side magnet having a ring shape and disposed to be spaced apart from the upper center magnet, and
wherein the F-PCM diaphragm is located between the lower magnet and the upper magnet.

6. The two-way speaker of claim 5 , wherein the magnet of the first speaker unit has a magnetization direction which is the same as magnetization directions of the lower side magnet and the upper center magnet of the second speaker unit, and has a magnetization direction opposite to magnetization directions of the lower center magnet and the upper side magnet.

Assignees

• Em Tech Co Ltd

Inventors

• Jeong Chan Ho
• Noh Young Seok
• Yu Byung Min

Classifications

• H04R9/025 Primary

  Magnetic circuit · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R2209/022

  Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils · CPC title

• H04R9/047

  in which the windings of the moving coil lay in the same plane · CPC title

• H04R1/24 Primary

  Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges · CPC title