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公开(公告)号：JP2000311313A
公开(公告)日：2000-11-07
申请号：JP11712199
申请日：1999-04-23
Applicant: SONY CORP
Inventor： NAGAI NOBUYUKI , KABAYA YOSHITERU , OSUE TADASHI
IPC: G11B5/39
Abstract: PROBLEM TO BE SOLVED: To make it possible to lessen both of the wear and uneven wear of an MR head by using a magnetic tape having a base material for which polyethylene terephthalate is used as a recording medium and using a magneto- resistive(MR) head element of a shielding type formed by using NiZn ferrite as a shielding material as a magnetic head element for reproduction. SOLUTION: The magnetic recording and reproducing device 1 is constituted to draw out the magnetic tape T from a tape cassette 6, to allow the magnetic tape T to travel in a state of wrapping the magnetic tape T around the outer peripheral surface of a rotary magnetic head device 10 along a guide pin 5 and to execute recording and reproducing of magnetic signals on the traveling magnetic tape T by the rotary magnetic head device 10. The polyethylene terephthalate is used as the base material of the magnetic tape T to be used as the recording medium and the MR magnetic head element of the shielding type by using the Ni/Zn ferrite is used as the magnetic head element for reproduction.
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公开(公告)号：JP2000298813A
公开(公告)日：2000-10-24
申请号：JP10323699
申请日：1999-04-09
Applicant: SONY CORP
Inventor： OSUE TADASHI
Abstract: PROBLEM TO BE SOLVED: To effective suppress wear of magnetic head element and damage of magnetic tape to obtain higher output by arranging the end part of a magnetic head element in the rotating drum side in such a manner as facing to the external side from the circumference surface of the device body and varying the amount of projection of the end part of the magnetic head element from the device body. SOLUTION: A piezoelectric ceramic 24 is expanded or contracted when a voltage is impressed because barium titanate, for example, is formed like a plate. The piezoelectric ceramic 24 is arranged within a head accommodating area 11 under the condition that the base send side thereof is mounted to a rotating drum 3 and the end face side supports a head supporting plate 23 on which a magnetic head element 20 is mounted. When a voltage is applied to the piezoelectric ceramic 24, the piezoelectric ceramic 24 is expanded toward the external circumference side of the rotating drum 3. Thereby, the magnetic head element 20 moves toward the external side of the rotating drum 3 via the head supporting plate 23 and position of the end face part is varied to the second position P2 from the first position P1.
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13.发明专利
公开(公告)号：JP2000155918A
公开(公告)日：2000-06-06
申请号：JP32844098
申请日：1998-11-18
Applicant: SONY CORP
Inventor： KABAYA YOSHITERU , OSUE TADASHI
IPC: G11B5/53
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head device in which the fine adjustment of the position of a head chip can be highly precisely operated, and to provide a magnetic recording and reproducing device in which recording and reproduction with high quality can be attained. SOLUTION: This magnetic head device is provided with at least a head base 2 to which at least a head chip 1 is fixed, and a fixing screw 4 for fixing the head base 2 to a rotary drum 3, and an adjusting screw 5 screwed into the rotary drum 3 for pressurizing the head base 2 and for adjusting the position of the head chip 1, and this magnetic recording and reproducing device is provided with this magnetic head device. In this case, an internal angle θ made by the central axis of the adjusting screw 5 and the butted face of the head base 2 to the rotary drum 3 is set in a range which is 0 deg.
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公开(公告)号：JPH11297059A
公开(公告)日：1999-10-29
申请号：JP10286998
申请日：1998-04-14
Applicant: SONY CORP
Inventor： KANO HIROSHI , ONOE SEIJI , INAGUMA TERUYUKI , YANAI IKUKO , HONDA JUNICHI , OSUE TADASHI
Abstract: PROBLEM TO BE SOLVED: To enable a user to easily exchange units without expert knowledge by constituting an apparatus of the unit for recording, reproducing information to a tape-like information record medium and a main body for detachably storing and electrically connecting the unit. SOLUTION: A deck part (unit) 2 is mounted detachably to a streamer main body 1e. The deck part 2 is mounted when a user inserts the deck part 2 in a Y1 direction to an insertion opening 1b of the main body 1e, and the deck part can be detached when the user takes out the deck part in a Y2 direction. The deck part 2 has rails 2c and 2d at side faces. The rails 2c, 2d are meshed with groove-like rail receivers 1c, 1d of the main body 1e via a slight gap when the deck part 2 is inserted to the main body 1e. Even the user without expert knowledge can easily exchange the deck part 2 when a magnetic head ends its life.
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公开(公告)号：JPH11203664A
公开(公告)日：1999-07-30
申请号：JP113798
申请日：1998-01-06
Applicant: SONY CORP
Inventor： OSUE TADASHI , SHIRAI TOSHIO , KABAYA YOSHITERU , SAITO TAKEHIKO , IKEGAMI TOMOHIRO
Abstract: PROBLEM TO BE SOLVED: To realize a magnetic recording/reproducing device of helical scan system, in which an MR head (magneto-resistance effect magnetic head) is used as the magnetic head for reproduction. SOLUTION: In this magnetic recording/reproducing device provided with the MR head 6 and a rotary drum on which the MR head 6 is mounted, when a signal from a magnetic tape 7 is reproduced by the helical scan system, the magnetic tape 7 in which plural protrusions 7c are formed on the surface of the tape 7 and which contains the conductive material in the magnetic layer is used as a recording medium.
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Patent Agency Ranking
公开(公告)号：JPH10302234A
公开(公告)日：1998-11-13
申请号：JP10950797
申请日：1997-04-25
Applicant: SONY CORP
Inventor： OSUE TADASHI , SHIRAI TOSHIO , IKEGAMI TOMOHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain a rotary magnetic head in which the size and the cost can be reduced even if a plurality of reproduction heads are provided by receiving a reproduction signal from a rotor reproduction signal wiring section at a noncontact reproduction signal wiring section provided for a stator. SOLUTION: Signal transmission channels CH1-CH4 are arranged annularly around respective shafts 5 on the inner surface of a stator core 20 and a rotor core 30. The wiring parts forming these channels CH1-CH4 are formed by winding an ordinary insulated wire annularly. When the coil 7 of the stator MS in a motor M is conducted, the rotor MR, the shaft 5, the flange 2a and the rotary drum 2 of the motor M and the rotor core 30 of a rotary transformer T are turned relative to the stator drum 1 and the stator core 20. The rotor core 30 and the stator core 20 ate disposed oppositely without touching each other.
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公开(公告)号：JPH10177924A
公开(公告)日：1998-06-30
申请号：JP33690096
申请日：1996-12-17
Applicant: SONY CORP
Inventor： OSUE TADASHI , SHIRAI TOSHIO , IKEGAMI TOMOHIRO
Abstract: PROBLEM TO BE SOLVED: To optimize regenerative signals outputted from a reproducing head by a method wherein a bias current given to the reproducing head of a magnetoresistance element of a rotary drum is controlled in intensity corresponding to the degree of abrasion of the reproducing head. SOLUTION: A bias current control means 200 has a function to control a bias current value BCD given to a reproducing head RH so as to make the output RST of regenerative signals RS of a reproducing amplifier 43 connected to the reproducing head RH of a magnetoresistance element. Therefore, when a bias current is varied by abrasion of the head, the output RST of regenerative signals RS obtained through reproducing amplifiers 43 and 43c is changed. A gain control 41a controls the since wave gain of an oscillator 41 corresponding to a change in the output RST of the regenerative signals RS, and a control signal CSS is sent to a bias current circuit 201 at a point P1 , whereby the voltage BCU of the reproducing head RH can be set variable so as to make the output RST of the regenerative signals RS optimal.
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公开(公告)号：JPH1083503A
公开(公告)日：1998-03-31
申请号：JP24020896
申请日：1996-09-11
Applicant: SONY CORP
Inventor： SHIRAI TOSHIO , OSUE TADASHI , IKEGAMI TOMOHIRO
IPC: G11B5/02
Abstract: PROBLEM TO BE SOLVED: To obtain a rotary head type recording and reproducing device capable of radiating the heat to be generated from electromagnetic induction coils of the power source transmission system of a rotary transformer. SOLUTION: This rotary head type recording and reproducing device 20 incorporates a rotary transformer 5. In order to radiate the heat to be generated from electromagnetic induction coils of the power source transmission system of the rotary transformer 5, plural through-holes 201 are provided on the outer peripheral surface of a fixed lower drum 2A or fins are formed on the outer peripheral surface of the rotor 502 of the rotary transformer 5 as a heat radiating device and the heat is radiated by actuating the rotor 502 as a fan or by using both of them jointly.
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公开(公告)号：JPH09231533A
公开(公告)日：1997-09-05
申请号：JP6032596
申请日：1996-02-23
Applicant: SONY CORP
Inventor： OSUE TADASHI
IPC: G11B5/53
Abstract: PROBLEM TO BE SOLVED: To reduce the irregularity of a track pitch to be recorded by a recording head in a magnetic recording device. SOLUTION: The positional relation of both heads is set so that a recording head RH- precedes a recording head RH+ and the recording head RH+ is shifted upward from the recording head RH- by a prescribed width on a rotating drum. In this case, the head width of the recording head RH+ is made to be almost the same size as a stipulated track pitch in advance and the head width of the recording head RH- is set so as to be larger than the track pitch and smaller than the two times. Consequently, the accuracy of a track pitch depends upon the head width of the recording head RH+ and the accuracy of an overwrite width W2 of the recording head RH+ to the recording head RH- is able to be ignored.
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公开(公告)号：JPH0969276A
公开(公告)日：1997-03-11
申请号：JP24381495
申请日：1995-08-29
Applicant: SONY CORP
Inventor： OSUE TADASHI
Abstract: PROBLEM TO BE SOLVED: To provide a searching method for surely detecting a search code without generating an error when data are recorded in units of sync blocks and searched with the search code recorded to each sync block. SOLUTION: A flat part of a reproduction waveform is set to be a length capable of arranging data of one or more sync blocks. The same IDs are overwritten by a count of sync blocks obtained from each track in one scan. Accordingly, in the event that the data are recorded in units of sync blocks and searched with the use of IDs of the sync blocks, a search code can be detected surely at the searching time.
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