公开(公告)号：JPH1064011A

公开(公告)日：1998-03-06

申请号：JP22524796

申请日：1996-08-27

Applicant: SONY CORP

Inventor： NAKAJIMA IKUYUKI ,  KANO TOSHIO ,  MASUGI SHINJI

IPC: G11B5/29

Abstract: PROBLEM TO BE SOLVED: To always, stably and simultaneously bring the head gap of plural unit heads into contact with a magnetic head by arranging and holding all of plural unit heads in a head supporting plate so as not to position on the same straight line. SOLUTION: The multichannel magnetic head device is composed of three unit magnetic heads 1-3, these unit magnetic head 1-3 are arranged in such a position that they mutually constitute a triangle on the head supporting plate 4, and unit magnetic heads 1-3 are not positioned on the straight line, whereby, the head and a magnetic tape 5 are brought into contact at three points by unit magnetic heads 1-3. By this way, even though spacing is brought about by vibration, since the head side is allowed to follow up spacing, unit magnetic heads 1-3 are easily and simultaneously brought into contact with the tape with excellent followup ability.

公开(公告)号：JPH1050021A

公开(公告)日：1998-02-20

申请号：JP20217896

申请日：1996-07-31

Applicant: SONY CORP

Inventor： IWAKI YUJI ,  NAKAJIMA IKUYUKI

IPC: G11B23/03 ,  G11B17/03

Abstract: PROBLEM TO BE SOLVED: To provide the disk cartridge and the disk drive device, capable of coping with high speed rotation of a discoid recording medium and having higher interchangeability with the conventional one. SOLUTION: The disk cartridge 1 is equipped with a cartridge main body, in which the discoid recording medium 5 is freely rotatably housed, a hub 7 fitted outward in a center hole of the discoid recording medium 5 and engaged with a disk driving means 60 and a hub supporting to the 12 fitted to an inner surface of the cartridge main body opposite to the hub 7. Since the hub 7 under the state of being engaged with the disk driving means 60 is held between this disk driving means 60 and the hub supporting body 12, floating and vibrating, etc., of the hub 7 are prevented in this disk cartridge, thus realizing the stable rotary drive for the discoid recording medium 5 under the high speed rotation.

公开(公告)号：JPH0991827A

公开(公告)日：1997-04-04

申请号：JP27074195

申请日：1995-09-26

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  KOIZUMI OSAMU ,  TAKAHASHI YUJI

IPC: G11B23/00 ,  G11B17/04 ,  G11B17/043

Abstract: PROBLEM TO BE SOLVED: To selectively load two kinds of disk cartridges, the large cartridge and the small cartridge, inside which floppy disks having different diameters, a large diameter and a small diameter, are housed. SOLUTION: This system is provided with a small-sized disk cartridge inside which a small-diameter floppy disk is housed and a large-sized disk cartridge 21 inside which a large-diameter floppy disk 24 is housed and which is constituted so that at least its width on a trailing edge 22b side may be larger than that of the small-sized disk cartridge. And also, it is provided with a centering guide 61 centering the leading edge 22a side of the small-sized disk cartridge and the large-sized disk cartridge 21 in common and positioning the small-sized disk cartridge and the large-sized disk cartridge 21 on the same center P2 of a cartridge holder 35.

公开(公告)号：JPH10177751A

公开(公告)日：1998-06-30

申请号：JP35349696

申请日：1996-12-16

Applicant: SONY CORP

Inventor： NAKAJIMA IKUYUKI ,  KANO TOSHIO

IPC: G11B15/60 ,  G11B5/008

Abstract: PROBLEM TO BE SOLVED: To stabilize the traveling of a magnetic tape and to slide all magnetic heads on the magnetic tape in constant states in a magnetic recording/ reproducing device using a plurality of magnetic heads (magnetic multihead) for performing recording/reproducing. SOLUTION: A plurality of recording/reproducing magnetic heads 3 are provided so as to be positioned in one side of a magnetic tape T, and plates 4 for stabilizing the traveling of the magnetic tape T are provided so as to face the magnetic heads 3 via the magnetic tape T. Preferably, the magnetic heads 3 or the plates 4 or all of these are supported by elastic members in order to adjust pressing of the magnetic tape T by the magnetic heads 3.

公开(公告)号：JPH09153201A

公开(公告)日：1997-06-10

申请号：JP31142595

申请日：1995-11-29

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  SATO TAKASHI

IPC: G11B5/027 ,  H03M1/12 ,  H03M5/22

Abstract: PROBLEM TO BE SOLVED: To provide the digital data recording device in which the recording density is greatly improved. SOLUTION: The digital data supplied from an input terminal 3 are supplied to a multilevel processing circuit 4 and become multilevel data. The data are supplied to an analog waveforming circuit 5 and become analog waveform signals. The signals are supplied to an AM modulating circuit 6 and become AM modulated signals. The signals are then supplied to a writing section 9 which consists of a recording processing circuit 7 that is a recording amplifer and a recording head 8. Then, the signals are recorded on a magnetic tape 10 by a recording head 8.

公开(公告)号：JPH0991921A

公开(公告)日：1997-04-04

申请号：JP27074095

申请日：1995-09-26

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  KOIZUMI OSAMU ,  TAKAHASHI YUJI

IPC: G11B23/033 ,  G11B23/00 ,  G11B23/03

Abstract: PROBLEM TO BE SOLVED: To apply a disc cartridge to a disc drive conforming to a 3.5 inch form factor and enlarge a diameter of a disc. SOLUTION: A lateral width B1 at a front edge 22a of a cartridge 22 is set to be 90.0mm. A lateral width B2 at a rear edge 22b is set to be 98.0mm. A diameter of a floppy disc 24 is accordingly enlarged from 85.8mm to 94.0mm.

公开(公告)号：JPH10154305A

公开(公告)日：1998-06-09

申请号：JP31160596

申请日：1996-11-22

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  KANO TOSHIO

IPC: G11B5/027 ,  G11B5/09 ,  G11B5/53 ,  G11B20/02

Abstract: PROBLEM TO BE SOLVED: To improve functionality by providing a selection means for selecting whether each head is used for the recording head or the reproducing head, and a mechanism for controlling the access of each head against an optional track. SOLUTION: The positioning of each head 32 to the track is realized by an access control mechanism using voice coils 33 in the state the rear side of a magnetic recording medium 4 is supported by guides 31, and each head 32 is brought into contact with the surface of the magnetic tape 4 from the front side of the magnetic tape 4. The figure (c) shows the structure provided with modularized well-known head structures in the plural used for a floppy disk drive, and this structure is formed so that the magnetic tape 4 is held between the heads 41 and hard pads 42 from the front and rear sides, and also the heads and the hard pads are integrally displaced in the breadthwise direction of magnetic tape 4 by voice coils 43 (access control mechanism), thereby positioning the head on the track of the magnetic tape 4.

公开(公告)号：JPH09106605A

公开(公告)日：1997-04-22

申请号：JP28444995

申请日：1995-10-06

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  SATO TAKASHI ,  TAKAHASHI YUJI

IPC: G11B23/00 ,  G11B17/04 ,  G11B17/043 ,  G11B23/03

Abstract: PROBLEM TO BE SOLVED: To obtain the under changeability between disk cartridges of different sizes. SOLUTION: A small-diameter and a large-diameter floppy disks 4, 24 are respectively accommodated in two kinds of a small and a large cartridges 2, 21. The disk cartridges are selectively inserted into a cartridge holder 35 in a direction parallel to a sliding direction of a shutter 10. The small-diameter and large-diameter floppy disks 4, 24 are selectively loaded on a common spindle 38 and a common disk table 39.

公开(公告)号：JPH0997465A

公开(公告)日：1997-04-08

申请号：JP27688595

申请日：1995-09-29

Applicant: SONY CORP

Inventor： SAITO KENGO ,  NAKAJIMA IKUYUKI ,  KOIZUMI OSAMU ,  SATO MASANORI ,  MASUGI SHINJI ,  NAKAZAWA NORIKO

IPC: G11B5/008 ,  G11B5/10 ,  G11B5/187 ,  G11B5/54 ,  G11B15/60 ,  G11B15/62 ,  G11B15/64 ,  G11B15/675 ,  G11B23/087

Abstract: PROBLEM TO BE SOLVED: To contrive the stabilization of recording/reproducing performance against a magnetic tape and also to surely prevent the occurrence of data error. SOLUTION: The device is provided with a magnetic head 81 forming a magnetic core in such a manner that a pair of semi-bodies 83A, 83B of magnetic core consisting of the magnetic material are butted each other through a gap material (g). Magnetic tape guide means 82A, 82B are arranged at the positions near this magnetic head 81. Opening parts 82b, 82b for sucking the magnetic tape, which are blocked by the magnetic tape 88 sliding in contact with the magnetic tape sliding surfaces 82a, are provided on these magnetic tape guide means 82A, 82B. The magnetic tape 88 running on the sliding surfaces 82a of the guide means 82A, 82B is sucked by the opening parts 82b, 82b for sucking the magnetic tape.

公开(公告)号：JPH07153237A

公开(公告)日：1995-06-16

申请号：JP32135293

申请日：1993-11-26

Applicant: SONY CORP

Inventor： NAKAJIMA IKUYUKI

IPC: G11B23/28 ,  G11B23/30

Abstract: PURPOSE:To reduce the manufacturing cost for the disk cartridge capable of discriminating a different kind of disk cartridge due to existence of information display holes at plural spots in adjacent positions respectively and to select a storage capacity with the same cartridge which can be of plural kinds of storage capacities by altering a format. CONSTITUTION:The information display holes 21a (21c and 21d) at plural spots in adjacent positions are all provided, and also a slide switch 21b for sliding these holes is provided, and then a case for plural kinds of cartridges is obtained by sliding this switch 21b. Consequently, one metal mold is enough for the case, so that the manufacturing cost for the cartridge is reduced, and then the same cartridge can be made to be any of cartridges of plural kinds of storage capacities wherever possible.