Energy converter, speaker, and method of manufacturing energy converter

Patent metadata

Field	Value
Publication number	US-9510100-B2
Application number	US-201414469712-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Sep 12, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

An energy converter includes a permanent magnet and a diaphragm. The permanent magnet is fixed to a predetermined area. The diaphragm is disposed on the permanent magnet and has a coil formed of a conductor pattern.

First claim

What is claimed is:

1. An energy converter comprising:
a permanent magnet fixed to an area of the converter; and
a diaphragm disposed on the permanent magnet and having a coil formed of a conductor pattern;
the permanent magnet including a deformable magnetic sheet;
wherein the area of the converter is a non-flat surface; and
wherein the permanent magnet is fixed around the non-flat surface.

2. The energy converter according to claim 1 , further comprising:
spacers formed between the diaphragm and the permanent magnet to secure a range of motion of the diaphragm.

3. The energy converter according to claim 1 , wherein the diaphragm has a surface facing the permanent magnet and having minute projections formed in dots.

4. The energy converter according to claim 1 , further comprising:
a buffer film disposed between the diaphragm and the permanent magnet to secure a range of motion of the diaphragm.

5. The energy converter according to claim 1 , wherein the conductor pattern is formed on both surfaces of the diaphragm.

6. The energy converter according to claim 1 , wherein the area of the converter is one of a cylindrical curved surface and a spherical curved surface.

7. The energy converter according to claim 1 , wherein the area of the converter is pyramidal surfaces of one of a pyramid and a truncated pyramid.

8. The energy converter according to claim 1 , wherein the permanent magnet is a bonded magnet.

9. The energy converter according to claim 1 , wherein the diaphragm includes a resin substrate.

10. The energy converter according to claim 1 , further comprising:
a plastic substrate on which the permanent magnet is fixed;
a buffer film disposed between the permanent magnet and the diaphragm to secure a range of motion of the diaphragm; and
a protective sheet covering the diaphragm and fixed to the plastic substrate.

11. The energy converter according to claim 10 , wherein the protective sheet is water-repellant and sound-transmissive.

12. The energy converter according to claim 10 , wherein the plastic substrate is flame-retardant.

13. The energy converter of claim 1 , wherein the area of the converter is a curved surface.

14. A speaker comprising:
a permanent magnet fixed to an area of the speaker; and
a diaphragm disposed on the permanent magnet and having a coil formed of a conductor pattern;
the permanent magnet including a deformable magnetic sheet;
wherein the area of the speaker is a non-flat surface; and
wherein the permanent magnet is fixed around the non-flat surface.

15. The speaker according to claim 14 , further comprising:
a plastic substrate on which the permanent magnet is fixed;
a buffer film disposed between the permanent magnet and the diaphragm to secure a range of motion of the diaphragm; and
a protective sheet covering the diaphragm and fixed to the plastic substrate.

16. The speaker of claim 14 , wherein the area of the speaker is a curved surface.

17. A method of manufacturing an energy converter, the method comprising:
fixing a permanent magnet to an area of the converter; and
disposing on the permanent magnet a diaphragm having a coil formed of a conductor pattern, including:
placing a magnetic sheet encapsulated with a magnetic fluid on the diaphragm to visualize a magnetization pattern of the permanent magnet disposed under the diaphragm as a shading pattern of the magnetic fluid, and
adjusting the diaphragm in position and disposing the diaphragm at a position at which the shading pattern matches the conductor pattern of the coil;

wherein the permanent magnet is fixed around the non-flat surface.

Assignees

• Shinotsuka Michiaki
• Kawase Tsutomu
• Ricoh Co Ltd

Inventors

• Shinotsuka Michiaki
• Kawase Tsutomu

Classifications

• H04R31/00

  Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor {(manufacture of microstructural arrangements of deformable or non-deformable structures in general B81C1/00182)} · CPC title

• H04R9/00

  Transducers of moving-coil, moving-strip, or moving-wire type · CPC title

• Y10T29/49005

  Acoustic transducer · CPC title

• H04R7/00 Primary

  Diaphragms for electromechanical transducers (in general F16J3/00); Cones (for musical instruments G10 ){(cones, diaphragms or the like, for emitting or receiving sound in general G10K13/00; Mounting thereof)} · CPC title

• H04R9/04

  Construction, mounting, or centering of coil · CPC title