Diffuser and speaker unit including diffuser

Patent metadata

Field	Value
Publication number	US-12526573-B2
Application number	US-202418618764-A
Country	US
Kind code	B2
Filing date	Mar 27, 2024
Priority date	Mar 31, 2023
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A diffuser capable of evenly and widely diffusing sound emitted from a speaker, thereby making it possible to obtain excellent acoustic radiation characteristics. The diffuser includes a base portion formed into a plate shape and including a through hole having approximately the same shape and size as a diaphragm of the speaker, a center reflection portion formed into a predetermined size corresponding to the through hole and supported by the base portion, and an edge reflection portion that is formed into an arcuate shape protruding at least either forward or rearward of the base portion from a peripheral edge of the through hole of the base portion and having a recessed inner surface, for further reflecting sound reflected from the center reflection portion.

First claim

What is claimed is:

1 . A diffuser disposed forward of a diaphragm of a speaker, for reflecting sound emitted from the speaker and thereby diffusing the sound, comprising:
a base portion that is formed into a plate shape having a predetermined planar shape in plan view, and includes a through hole having approximately the same shape and size as the diaphragm of the speaker; a center reflection portion that is formed into a predetermined size corresponding to the through hole and is supported by the base portion; and an edge reflection portion that is formed into an arcuate shape protruding at least either forward or rearward of the base portion from a peripheral edge of the through hole of the base portion and having a recessed inner surface, for further reflecting sound reflected from the center reflection portion.

2 . The diffuser according to claim 1 , wherein the center reflection portion is formed into a hollow shape open forward of the base portion and has an opening in a central portion thereof, which extends through the center reflection portion and has a predetermined diameter.

3 . The diffuser according to claim 2 , wherein the center reflection portion further includes a plurality of boards which each have a predetermined height protruding forward of the base portion and extend parallel to each other such that each traverses the opening.

4 . The diffuser according to claim 3 , wherein the plurality of boards include:
a center board traversing a center of the opening, and a plurality of side boards each arranged with a predetermined spacing from the center board, wherein the center board is set to be highest in height, and wherein the plurality of side boards are set to be lower in height as the side boards are located further away from the center board.

5 . A speaker unit including the diffuser according to claim 1 , comprising:
a baffle board that is formed into a plate shape having a predetermined thickness, and includes a sound emission hole having approximately the same shape and size as the edge reflection portion of the diffuser and extending through the baffle board; the diffuser that is mounted to the baffle board from a rear surface side of the baffle board, and has the center reflection portion disposed inside the sound emission hole; and a speaker mounted to a rear surface side of the diffuser, wherein the diffuser is mounted to the baffle board such that the edge reflection portion is fitted in the sound emission hole of the baffle board.

6 . The speaker unit according to claim 5 , wherein the diffuser is mounted to the baffle board in a state in which the base portion is in contact with a rear surface of the baffle board, and a front surface of the center reflection portion is set to be located at approximately the same position as a front surface of the baffle board.

Assignees

• Kk Kawai Gakki Seisakusho

Inventors

• Konishi Kazuki
• Nakanishi Yoshinori

Classifications

• H04R1/025

  Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture · CPC title

• H04R1/345 Primary

  for loudspeakers · CPC title

• H04R27/00 Primary

  Public address systems (circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; {monitoring or testing arrangements for public address systems H04R29/007}; amplifiers H03F) · CPC title