公开(公告)号：JPH09266383A

公开(公告)日：1997-10-07

申请号：JP27190396

申请日：1996-09-20

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU ,  KUBOTA YUJI ,  IWAYAMA TAKESHI

IPC: H05K5/03 ,  H04R1/02

Abstract: PROBLEM TO BE SOLVED: To provide an electrical device box from which an electrical device cable can be pulled out in its any direction and thus which can increase its mounting flexibility and can allow user's easy and quick wiring works. SOLUTION: The electrical device box comprises an electrical device box body 30 having a cable terminal 34 provided at its rear face and a cover 36 fitted onto the rear side of the electrical device box body 30 to cover the cable terminal 34. The cover 36 can be fitted onto the rear face of the electrical device box body 30 at least from two directions. Even when the cover 36 is fitted onto the rear face of the box body 30 in any one of the two directions, an outer face of the cover 36 can be continuously connected to an outer surface of the box body 30.

公开(公告)号：JPH06205493A

公开(公告)日：1994-07-22

申请号：JP35989292

申请日：1992-12-28

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU ,  KUBOTA YUJI ,  NAKAZAWA SATOSHI ,  OTONO TOORU

IPC: G01H11/00 ,  H04R3/00

Abstract: PURPOSE:To accurately extract a displacement of a vibration part of a speaker with simple configuration. CONSTITUTION:A conductive bobbin 46 and a cone 62 are vibrated in the direction of the arrow mark A in response to an electric signal inputted to a voice coil 48 wound on the bobbin 46 of a cone speaker unit 20. A fixed electrode 66 is fixed in the bobbin 46 along the lengthwise direction confronting with the bobbin 46 with an interval. The opposite area between the bobbin 46 and the fixed electrode 66 is fluctuated by the vibration of the bobbin 46, and a capacitance of a capacitor comprising the fixed electrode 66 and the bobbin 46 is changed proportional to a displacement of the bobbin 46. The change is extracted through a lead wire 70 and a lead wire connecting to the bobbin 46.

公开(公告)号：JPH0678389A

公开(公告)日：1994-03-18

申请号：JP25062392

申请日：1992-08-25

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU ,  TAKAGI TSUYOSHI ,  KUBOTA YUJI

IPC: H04R1/30 ,  H04R1/08

Abstract: PURPOSE:To obtain the throat jig in which no phase interference takes place even with a sound wave whose frequency band is high. CONSTITUTION:Branch parts 58, 60 are extended separately respectively from other end of a main body 56 extended from one end coupled with a flange 54 for horn coupling almost in a straight line with an obtuse angle with respect to the main body 56 and each tip is provided with a unit coupling flange 62 (64). A height (s) of a longitudinal cross section around the coupling part between the branch 58 and the main body 56 is designed to be small to decrease a distance (d) of axial lines 66, 68 passing through the centre of the branch parts 58, 60 and entering the main body 56 in the main body 56.

公开(公告)号：JP2003153366A

公开(公告)日：2003-05-23

申请号：JP2001343233

申请日：2001-11-08

Applicant: TOA CORP

Inventor： IWAYAMA TAKESHI ,  YOSHIOKA TSUTOMU

IPC: H04R1/30

Abstract: PROBLEM TO BE SOLVED: To reduce the length of a horn without increasing the opening diameter of the horn and reducing a directional angle. SOLUTION: A corn speaker 10 is provided in a horn 2 having an opening on the front. A directivity controller 12 is provided at the front as compared with the corn speaker 10 in the horn 2. A front end 15 in the directional controller 12 is arranged so that it does not project from the front of the horn 2. Then, the front end section 15 in the directivity controller 12 is formed to be thinner than the rear end section located at the side of the corn speaker 10 in the directivity controller 12.

公开(公告)号：JPH0927999A

公开(公告)日：1997-01-28

申请号：JP20055795

申请日：1995-07-12

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU ,  KUBOTA YUJI ,  FUKUNAKA YASUHIRO ,  IWAYAMA TAKESHI ,  OTONO TOORU

IPC: H04R3/00 ,  H04R29/00

Abstract: PROBLEM TO BE SOLVED: To check the polarity of a speaker line without being affected by a device in use and an operating environment. SOLUTION: First and second module terminals 38, 40 of a check device 36 are connected between lines 26, 28 of a speaker 20. Darlington connection transistors(TRs) 42, 44 are connected between the module terminals 38, 40 via a resistor 46 in the check device 36. Resistors 52, 54 are connected in series between the module terminals 38, 40 and a parallel circuit consisting of a resistor 56 and a diode 58 is connected between an interconnecting point A and a base of the TR 42. A capacitor 50 is connected between the base of the TR 42 and the 2nd module terminal 40. A charging time constant of the capacitor 50 is longer the longest period of an audible frequency signal fed from an amplifier 30 to the speaker lines 26, 28 and a discharge time constant is smaller than the charging time constant.

公开(公告)号：JP2008124903A

公开(公告)日：2008-05-29

申请号：JP2006308086

申请日：2006-11-14

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： TETSUKA SEIICHI ,  YOSHIOKA TSUTOMU

IPC: H04R1/32 ,  H04R1/24 ,  H04R1/30

CPC classification number: H04R1/24 ,  H04R1/403

Abstract: PROBLEM TO BE SOLVED: To provide a loudspeaker system, with a woofer almost coaxial with the entire tweeter, in which the sound waves radiated from the woofer is hard to interfere with the sound waves radiated from the tweeter in at least one direction, with a sound pressure frequency characteristics being easy to be stabilized.
SOLUTION: A loudspeaker system 1 comprises a woofer 2 and three or more tweeters 3. The tweeters 3 are placed in front of the woofer 2, arranged in arc.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种扬声器系统，具有与整个高音单元几乎同轴的低音扬声器系统，其中从低音扬声器辐射的声波难以与至少一个方向上从高音单元辐射的声波干涉 声压频率特性易于稳定。 解决方案：扬声器系统1包括低音扬声器2和三个或更多个高音扬声器3.高音扬声器3被放置在低音扬声器2的前方，被设置成弧形。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JPH09205694A

公开(公告)日：1997-08-05

申请号：JP26666796

申请日：1996-09-17

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU ,  KUBOTA YUJI ,  IWAYAMA TAKESHI

IPC: H04R1/00 ,  H04R1/06

Abstract: PROBLEM TO BE SOLVED: To surely prevent production of rust or improper contact without a dripped cable terminal of a speaker box due to rainwater or the like and to easily and quickly attain connection. SOLUTION: A recessed part 32 is formed to a main body rear side, a speaker box main body 30 has a cable terminal 34 in the recessed part 32 and a cover 36 is used to fitted to the recessed part 32 in a prescribed direction, a notch for a speaker cable is provided to a lower part of the cover 36 and lock members 40, 42 to be projected from the main body rear side are provided respectively to the upper part and the lower part of the cable terminal 34, clip members 44, 46 to clip the lock members 40, 42 from the upper and lower sides are provided to the inner side of the cover 36 and elastic bodies 48, 50 made of a rubber, a sponge or a soft plastic or the like are fitted to the inside of the members 44, 46. In this case, projections 52, 54 are fitted to the tip of the lock members 40, 42 so that the tip of the lock members 40, 42 is intruded in the elastic bodies 48, 50.

公开(公告)号：JPH02288499A

公开(公告)日：1990-11-28

申请号：JP11178189

申请日：1989-04-27

Applicant: TOA CORP

Inventor： YOSHIOKA TSUTOMU

IPC: G10K11/02 ,  H04R1/30

Abstract: PURPOSE:To obtain a uniform directivity angle characteristic over a broad band and higher sound pressure characteristic by constituting the speaker to be a 1st section of the throat side and a 2nd section at the opening side and forming opposite side walls to be a specific shape. CONSTITUTION:A couple of opposite side walls 1, 2 consist of two sections being the 1st section at the throat side 3 and the 2nd section at the opening side 4 and each side wall curve depends on equation y=a+becx (where a, b, c are constants different from the 1st and 2nd sections). Through the constitution above, a higher sound pressure is obtained from the low frequency to the intermediate frequency in the frequency characteristic while keeping a uniform directive angle characteristic in the horizontal direction and the part of the side walls 1, 2 close to the opening is formed by a circular-arc so that a sound wave is more smoothly parted in the vicinity of the opening, the directivity angle is in general narrow and even when more accurate control is requested, the narrowing phenomenon is avoided. Thus, uniform directive angle characteristic over a broad band is obtained.