公开(公告)号：JP2001256625A

公开(公告)日：2001-09-21

申请号：JP2000066768

申请日：2000-03-10

Applicant: SONY CORP

Inventor： KIKO SHINKO ,  AKAO TAKETO ,  SHINKAI KENTARO ,  KOGURE ISAO

IPC: G11B5/53

Abstract: PROBLEM TO BE SOLVED: To perform recording/reproducing using one set of rotary magnetic heads, in a VTR matched with an analog 8-milli system or a digital 8-millimeter system. SOLUTION: When the track width of a magnetic track in the SP mode of an analog 8-millimeter system is 20.5 μm, the track width of a magnetic track in the SP mode of a digital 8-millmeter system is 16.34 μm, and the track width of a magnetic track in the LP mode of the digital 8-millimeter system is 10.9 μm, one set of rotary magnetic heads 1A and 1B is set. The length of an effective working gap between the rotary magnetic heads 1A and 1B is set in the range of 15 μm to 19 μm.

公开(公告)号：JPH10302217A

公开(公告)日：1998-11-13

申请号：JP10950597

申请日：1997-04-25

Applicant: SONY CORP

Inventor： KOGURE ISAO

IPC: G11B5/127 ,  G11B5/187

Abstract: PROBLEM TO BE SOLVED: To make small a side erasing width and prevent drop of head efficiency. SOLUTION: In this magnetic head 10, a gap 13 for recording and reproducing data to and from a magnetic recording medium is formed by joining of the magnetic core half-bodies 11, 12 and the length of gap 13 is restricted to become the predetermined length by the track width restricting grooves 14, 15 provided at both end portions of gap 13. In this case, the portions 14a, 14b, 15a, 15b adjacent to the gap 13 of the track width restricting grooves 14, 15 are formed so that the groove angle becomes zero in the same length as the recording wavelength.

公开(公告)号：JPH08221723A

公开(公告)日：1996-08-30

申请号：JP5509995

申请日：1995-02-20

Applicant: SONY CORP

Inventor： KOGURE ISAO

IPC: G11B5/465

Abstract: PURPOSE: To surely degauss a magnetic head in a short time by making flow a prescribed impressed current through the coil of the magnetic head for a prescribed time, making flow an attenuating current through it for a prescribed time, applying attenuating magnetic field to a head core, taking off the head and degaussing it. CONSTITUTION: The magnetic heads 8a-8d are connected freely detachably to the coils 10a-10d of a rotor side of rotary transformers 7a-7d. At this time, an input voltage for a square wave generation circuit 1 is about 7V. When a switch 3 is turned on, a spike like continuous wave C of an impressed current value 1 is impressed from differential capacitors 6a-6d to the coils 9a-9d of the stator side. The impression time T1 is 1-5 seconds. The preferable impressed current value I is 800mA. The impressed current I is controlled by changing applied voltage for a circuit 1 of a degaussing circuit. At this time, the fact that a bias current value is zero, is required. Then, the switch 3 is turned off for two seconds or longer, and magnetization is attenuated, and head core residual magnetism is made zero. The magnetic heads 8a-8d are taken off in the state where the voltage is applied to the degaussing circuit to be degaussed.

公开(公告)号：JP2000182229A

公开(公告)日：2000-06-30

申请号：JP35773798

申请日：1998-12-16

Applicant: SONY CORP

Inventor： KOGURE ISAO ,  KOTANI YASUTAKA ,  YASAKA KAZUYUKI ,  KIMURA MASANORI ,  TAKEDA KEIKO ,  OSABE HISAO

IPC: G11B5/09 ,  G11B5/02 ,  G11B5/53 ,  G11B20/12 ,  H04N5/91

Abstract: PROBLEM TO BE SOLVED: To make it possible to reproduce information recorded in two recording systems by setting a gap width of a magnetic head to a value wider than a 1st track width in accordance with a 1st recording system and smaller than a 2nd track width in accordance with a 2nd recording system. SOLUTION: To enable this device to record and reproduce a video audio signal on an 8 mm video tape in a digital 8 mm system and be also practical enough to reproduce an video audio signal of an analog 8 mm system recorded on an 8 mm video tape, a gap width GpW of magnetic heads 12A, 12B is selected to be 19-29 μm, a value near the gap width GpW (= 20.5 μm) from which the highest C/N can be obtained in the analog 8 mm system. In such a manner, a sufficient reproducing output is obtained when a video audio signal recorded in the analog 8 mm system is reproduced, and also sufficient C/N can be obtained in practice also when a video audio signal recorded in the digital 8 mm system is reproduced.

公开(公告)号：JPH08287406A

公开(公告)日：1996-11-01

申请号：JP11793995

申请日：1995-04-19

Applicant: SONY CORP

Inventor： KOGURE ISAO

IPC: G11B5/127

Abstract: PURPOSE: To provide a magnetic head capable of securing a satisfactory touching and a long service life. CONSTITUTION: In the magnetic head H having a gap 16 in its sliding surface 12 on which a tape-like information recording medium is slid, the length of the sliding surface 12 in the direction perpendicular to the sliding direction is set smaller in a part adjacent to the gap 16. Also, the length of the sliding surface 12 in the direction perpendicular to the sliding direction is set larger in a part apart from the gap.

公开(公告)号：JPH07296318A

公开(公告)日：1995-11-10

申请号：JP9272194

申请日：1994-04-28

Applicant: SONY CORP

Inventor： KOGURE ISAO

IPC: G11B5/187

Abstract: PURPOSE:To obtain a high output magnetic head which facilitates the substantial reduction of a spacing loss and the suppression of the attenuation of a recording/reproducing signal by making the magnetic head secure to touch a tape. CONSTITUTION:A closed magnetic path is composed of a pair of magnetic half-cores 1 and 2 which are made of a magnetic core material and are made to butt against each other. The widths of medium sliding surfaces 1a and 2a with which a magnetic recording medium is brought into sliding contact, are made to gradually increase in the feeding direction of the magnetic recording medium.

公开(公告)号：JPH07262515A

公开(公告)日：1995-10-13

申请号：JP5360894

申请日：1994-03-24

Applicant: SONY CORP

Inventor： KOGURE ISAO

IPC: G11B5/127 ,  G11B5/187 ,  G11B5/23

Abstract: PURPOSE:To easily measure the depth of a magnetic gap with good accuracy, to regulate the depth of the magnetic gap with good accuracy, to stabilize the characteristics of a magnetic head, and to attain good productivity. CONSTITUTION:A depth marker 12 to detect the depth (d) of a magnetic gap (g) is embedded in a melt fitting glass 7 packed in the clearance part held between mutual track width regulating grooves formed on the butting faces of a pair of magnetic core half bodies 1, 2 and a part of the depth marker 12 is exposed on the confronting faces 1b, 2b of a medium. In this method, the depth marker 12 is formed in a shape of a rectangular equilateral triangle. It may be embedded in such a manner that the direction of one side 2a out of two sides having equal length is matched with the depth direction of the magnetic gap (g) and the length t1 of the side 2a is made equal to the depth (d), and the other side 12b of the triangle is exposed on the faces 1b, 2b of a medium.

公开(公告)号：JP2003317347A

公开(公告)日：2003-11-07

申请号：JP2002111772

申请日：2002-04-15

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KUSHIRO SUNAO ,  FUJII HIROSHI ,  TAKAZAWA TAKEHARU ,  HASEGAWA SHINICHI ,  KOGURE ISAO ,  YOSHIDA TETSUYUKI

IPC: G11B33/12 ,  G11B15/43 ,  G11B15/60

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording and reproducing device which is miniaturized and improved in the performance of a tension regulator without increasing the number of parts. SOLUTION: A part of a loading motor 6 is arranged to invade a tape path area determined from the locations of a mobile guide 1 and a tension regulator guide 8 in the case of completely loading a tape 2. The loading motor 60 abutted on the tape on the outer periphery of a case is formed into smooth surface. When running the tape 2, by pressing the tape 2 with the outer peripheral surface of the case of the loading motor 60, a tape lap angle to the tension regulator guide 8 is increased to increase a component of feedback due to the tape tension, and performance as a tension regulator is improved. Besides, since a part of the loading motor 6 is located while invading the tape path area, a space for an X portion of a corner is excluded and the device is miniaturized as a whole. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种小型化并且在不增加部件数量的情况下提高张力调节器的性能的磁记录和再现装置。 解决方案：装载马达6的一部分布置成在完全装载带2的情况下侵入从移动引导件1和张力调节器引导件8的位置确定的带路径区域。加载马达60邻接 在外壳上的胶带上形成光滑的表面。 当运行胶带2时，通过用装载电动机60的壳体的外周表面压带带2，增加了与张力调节器引导件8的带搭接角度，以增加由于带张力引起的反馈的分量，并且 作为张力调节器的性能得到改善。 此外，由于装载电动机6的一部分在侵入磁带路径区域的同时被定位，因此排除了角部的X部分的空间，整体上使装置小型化。 版权所有（C）2004，JPO

公开(公告)号：JP2002216303A

公开(公告)日：2002-08-02

申请号：JP2001014850

申请日：2001-01-23

Applicant: SONY CORP

Inventor： MOGI TAKAYUKI ,  KAMIKUI KEIZO ,  HASEGAWA SHINICHI ,  KOGURE ISAO ,  SAKAI MASAHIRO ,  KUSHIRO SUNAO ,  YOSHIDA TETSUYUKI

IPC: G11B33/12 ,  G11B5/02

Abstract: PROBLEM TO BE SOLVED: To provide a rotating drum which can be made small and light in weight, and which can prevent the circuit board from floating due to repulsion of the relaying contact springs to secure reliable electric contact while improving the reliability of the balancing ring and protecting the heads and the circuit board from static charges or electromagnetic fields. SOLUTION: In a system that a circuit board 13 is attached on a rotating drum 10, the circuit board 13 is prevented from being pushed up by the repulsion of the spring contacts 17a of the relaying contacts 17 attached on it by providing a reinforcing plate 24 on the circuit board 13 and fastening together using bolts 24, while avoiding poor contact of the circuit board 13. The reinforcing plate 14, molded together with the balancing ring 17, protects the circuit board 13 and heads 11 with its shielding effect from static charges or outside electromagnetic fields.

公开(公告)号：JPH09138921A

公开(公告)日：1997-05-27

申请号：JP29567195

申请日：1995-11-14

Applicant: SONY CORP

Inventor： AIHARA YASUNOBU ,  KOGURE ISAO

IPC: G11B5/53 ,  G11B5/29

Abstract: PROBLEM TO BE SOLVED: To eliminate an output difference between 1st and 2nd magnetic heads and to constitute a system without requiring complicated signal processing by making the 1st magnetic head and the 2nd magnetic head different in magnetic head width from each other. SOLUTION: Magnetic gaps GA and GB of the 1st magnetic head 1a and the 2nd magnetic head 1b respectively are given different directional azimuths βfrom each other to the head traveling direction. Then, in this constitution, particularly, a magnetic gap width GWA of the 1st magnetic head 1a and a magnetic gap width GWB of the 2nd magnetic head 1b are different from each other. That is, GWB>GWA. In this case, GWB>GWA is set in order that a vertical component of the gap width GWA to the magnetic tape traveling direction and a vertical component of the gap width GWB to the magnetic tape traveling direction should approach each other, or preferably should be equalized. Consequently, the output difference between the two channels can be eliminated, thus unnecessitating the output adjustment by signal processing.