Us 4750208

United States Patent [191 [11] Patent Number: 4,750,208 * Yamada et a1. [45] Date of Patent: Jun. 7, 1988

[54] AUDIO-BAND ELECTROMECHANICAL [56] References Cited VIBRAHON CONVERTER U.S. PATENT DOCUMENTS

_ , - 1,962,055 6/1934 Cawley ............................. .. 381/162 [75] Invemms' fgatgkygmfdaankkua Kommu bth 2,284,444 5/1942 Peterson 329/134 y a? 3,050,583 8/1962 Berlant . . . . . . . . . .. 381/27

. 3,085,568 4/1963 Whitese11 .. 128/33 [73] Assignee: Bodysonic Kabushiki Kaisha, Tokyo, 3,277,384 10/1966 Loughlin 329/134 Japan 3,334,195 8/1967 Ashworth .. 381/198

3,880,152 4/1985 Nohmura .... .. 128/33 - _ - - 3,984,636 10/1976 Turner ........ .. 381/25 [*1 Nmlce' If P"ttfct)h: 3111135311: Patten 4,023,566 5/1977 Martinmaas .. 128/33

S. 899" ' ' as can 4,055,170 10/1977 Nohmura .... .. 128/33 dlsclalmed- 4,064,376 12/1977 Yamada 128/33

4,179,009 12/1979 Birkner .... .. .. 181/150 [21] App1.No.: 649,852 4,354,067 10/1982 Yamada et a1. .. 381/158

4,433,209 2/1984 Kurosawa ....... .. 381/25 - _ 4,495,638 1/1985 Yamada et a1. ...... .. 381/27

[22] Med Sep 12 1984 4,514,599 4/1985 Yanagishma . . . . . . . . . . .. 381/152

4,550,428 lO/1985 Yanagishima . .... .. 381/194 Related Us. Application Data 4,635,287 1/1987 Hirano .............................. .. 381/194

[62] Division of Set. NO. 351,555, Feb. 23, 1981, Pat. No. FOREIGN PATENT DOCUMENTS 4,495,638, which is a division of Ser- NO- 25501, Mar- 2390880 5/1977 France ................................ .. 381/27 30, 1979, Pat. No. 4,354,067. 1447588 8/ 1976 United Kingdom .

[30] Foreign Application Priority Data OTHER PUBLICATIONS Am li?er E uipment for Low Frequency Notes, May 17, 1978 [JP] P q '

May 31, 1978 [JP] Rev. Esp. Electron, (Spain), v01. 25, No. 285286, Aug. May 31, 1978 [JP] 78~ May 31, 1973 [JP] Primary Examiner-Jin F. Ng Jlm- 22, 1973 [JP] Assistant Examiner-Danita R. Byrd 1111- 27, 1973 [JP] Attorney, Agent, or FirmJames C. Wray Jul. 27, 1978 [JP] Aug. 7, 1978 [JP] [57] ABSTRACT Oct. 5, 1978 [JP] Audio-band electromechanical vibration converter

Nov. 20, 1978 [JP] characterized in that a yoke having a permanent magnet Dec. 26, 1978 [JP] and a magnetic gap formed therein is displaceably

housed by a damper in a casing to which a vibration [51] Int. Cl.4 ............................................. .. H04R 1/02 plate is attached; a coil attached to the casing is placed [52] U.S. c1. .................................... .. 381/162; 128/33; in said magnetic gap; and the casing gives an Output of

381/ 151; 381/158; 381/ 188; 381/ 197; 381/27 a mechanical vibration synchronized with a low-band [58] Field of Search ..................... .. 381/27, 87, 90, 86, audio-signal

381/162, 205, 188, 158, 151, 197, 27; 179/181 W; 128/33, 64; 181/150 19 Claims, 30 Drawing Sheets

Low LOW PASS POWER

mxsa as? L'M'TER FILTER AMP CONVERTER

L 2| 28 22 27 25 26 24 RM

US. Patent Jun. 7, 1988 Sheet 1 0f 30 4,750,208

FIG.1

FIGZ 10 HQ 8 1501 SDS 60

4 )


15a 11G 15 9G 9c1'16 zsbsm M Q/ /J// /)// 8 6 SD11

60

11

FIGS

US. Patent Jun. 7, 1988 Sheet 3 0f30 4,750,208

6a 7/


FIG.7 LOW PASS POWER ,iiEPER DELAY 513E FILTER AMP CONVERTER

J\ % 24 2| 22 28 t/ 25 V

FIG.8

if; 21 (L '

R R

"l. l I "I

.. C6 C4 C5

1/ .

FIG.9 Low LOW

PASS POWER MIXER m3? 'JWTER FILTER AMP CONVERTER

LO R 2| _- 2s 22 2-, 25 @- 24 Q____

US. Patent Jun. 7, 1988 Sheet 6 of 30 4,750,208


FIG.13


FIGJA

4 16b 2 15c115 6 6o 37 8 110

/ v 3


F|G.19

62b

FIG.21

7 3


mm OE

US. Patent Jun. 7, 1988 Sheet 13 0130 4,750,208

FIG. 23 (37b

L* 111


FIG.24

2 7 3 7

// I /

1/ / // / r B

5 I

26b 6

, /

a. ..... . I A_ I 5,40% 7/4 m N 1

04 , m1]

1%

US. Patent Jun. 7, 1988 Sheet 15 0f 30

370

4,750,208


FIG.26


FIG.29 .FIG.27


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