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61. 发明专利

JPS61255506A COMPOSITE TYPE MAGNETIC HEAD 失效
公开(公告)号：JPS61255506A
公开(公告)日：1986-11-13
申请号：JP9659685
申请日：1985-05-09
申请人： HITACHI MAXELL
发明人： SAKAMOTO AKITO , INAGOYA OSAMU
IPC分类号： G11B5/23 , G11B5/127 , G11B5/245
摘要： PURPOSE:To improve recording efficiency by forming a thin film layer having a satd. magnetic flux density lower than the satd. magnetic flux density of a material constituting a core member to the butt part of a gap and expanding the gap length to the opposed surfaces of the core member in the stage of recording. CONSTITUTION:Core halves 1a, 1b are formed of Mn-Zn ferrite and are formed with slopes 7 on both sides of the opposed surfaces 6 having a prescribed track width. The thin film layer 3 is formed of a magnetic material having the satd. magnetic flux density lower than the satd. magnetic flux density of the Mn-Zn ferrite constituting the core halves 1a, 1b such as, for example, Co30Nb70. The layer 3 is formed by sputtering, etc. on the opposed surfaces 6 and slopes 7 of the core halves 1a, 1b. The gap 4 is formed of a nonmagnetic material such as SiO2 by sputtering. Recording and reproducing efficiency is improved if the layer 3 and the gap 4 are formed to have respectively about 1.5-2.0mum, 0.3-0.5mum thicknesses.

62. 发明专利

JPS61214110A MAGNETIC HEAD 失效
公开(公告)号：JPS61214110A
公开(公告)日：1986-09-24
申请号：JP5411985
申请日：1985-03-20
申请人： HITACHI MAXELL
发明人： TOTTORI TAKESHI , FUJIWARA HIDEO , INAGOYA OSAMU
IPC分类号： G11B5/23 , G11B5/127 , G11B5/21 , G11B5/265
摘要： PURPOSE:To prevent the magnetic characteristic from being deteriorated, by forming a non-magnetic thin film for suppressing a chemical reaction of a component of a low melting point glass and a component of a metallic magnetic thin film, on a gap butt opposed surface of a core half body, and forming a low melting point glass thin film on its non-magnetic thin film. CONSTITUTION:A non-magnetic thin film 9 of 0.005um is formed by sputtering SiO2, on a gap butt opposed surface of the first core half body and the second core half body. A low melting point glass thin film 10 is formed by sputtering low melting point glass PbO (85.0wt%) - B2O3 (11.5wt%) - SiO2 (3.5wt%), on the non-magnetic thin film 9. Thereafter, a winding part 3 and the back part of the core are joined by the low melting point glass thin film 10 which requires no heating, and the gap is joined.

63. 发明专利

JPS61214109A MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPS61214109A
公开(公告)日：1986-09-24
申请号：JP5412085
申请日：1985-03-20
申请人： HITACHI MAXELL
发明人： TOTTORI TAKESHI , INAGOYA OSAMU , FUJIWARA HIDEO
IPC分类号： G11B5/245 , G11B5/10 , G11B5/187 , G11B17/32
摘要： PURPOSE:To slide smoothly a magnetic recording medium by forming a recessed part on a medium sliding surface of a magnetic head, and sucking the magnetic recording medium which is running, to the medium sliding surface of the magnetic head. CONSTITUTION:One core base body 5 and the other core base body are made of Mn-Zn ferrite. Also, metallic magnetic films 6, 8 which are stuck to these core base bodies 5, 7 are formed by sputtering an amorphous magnetic alloy. A recessed groove 10 is formed in a shape of a long groove extending in the running direction of a magnetic recording medium, three lines each are recessed and provided, respectively, on a medium sliding surface 11 of one core base body 5 and the other core base body 7, and a size of each recessed groove 10 is prepared to 20mum width, 1mm length and 20mum depth. In this way, when the magnetic recording medium is driven to rotate, it is sucked to the medium sliding surface of a magnetic head by an action of the recessed part, the vibration is suppressed, and an uneven wear of the magnetic metallic film is decreased.

64. 发明专利

JPS6174117A Magnetic head device 失效
标题翻译：磁头设备
公开(公告)号：JPS6174117A
公开(公告)日：1986-04-16
申请号：JP19486984
申请日：1984-09-19
申请人： Hitachi Maxell Ltd
发明人： INAGOYA OSAMU , FUJIWARA HIDEO , HAYASHI MASASHI
IPC分类号： G11B5/49 , G11B5/187 , G11B5/48 , G11B5/58
CPC分类号： G11B5/4886 , G11B5/58
摘要： PURPOSE:To improve the adhesion of a magnetic core to a disc by decreasing the length of head elements arranged opposedly vertically while clipping the disc to be shorter than the length of the element holder so as to improve the contact surface pressure. CONSTITUTION:The length L1 of the head elements 3 of the magnetic head device arranged opposedly vertically while clipping a floppy disc in the disc running direction is decreased than the length L2 of the head element holder 2. since the area of the sliding faces 4a, 5a of the head element 3 is decreased remarkably to the area of the sliding face 2a of the holder 2, the contact surface pressure of the sliding faces 4a, 5a is increased in applying a pressing force to the head device. Thus, the adhesion with the disc is improved by increasing the contact surface pressure of the head without increasing the total surface pressure so as to improve the recording/reproducing characteristic.
摘要翻译：目的：通过减少磁头元件相对垂直设置的头部元件的长度，同时将磁片限制在比元件保持器的长度短，从而提高接触表面压力，从而提高磁芯与磁盘的密合性。构成：在盘驱动方向上夹住软盘的同时相对垂直设置的磁头装置的头元件3的长度L1比头元件保持架2的长度L2减小。由于滑动面4a，头元件3的5a相对于保持器2的滑动面2a的面积显着减小，因此在向头部装置施加按压力的同时，滑动面4a，5a的接触面压力增加。因此，通过在不增加总表面压力的情况下增加头部的接触表面压力来提高与盘的粘附性，从而提高记录/再现特性。

65. 发明专利

JPS6174109A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS6174109A
公开(公告)日：1986-04-16
申请号：JP19486284
申请日：1984-09-19
申请人： Hitachi Maxell Ltd
发明人： INAGOYA OSAMU , FUJIWARA HIDEO , HAYASHI MASASHI , YAMANO MINORU , TOTTORI TAKESHI
IPC分类号： G11B5/245 , G11B5/127 , G11B5/17 , G11B5/187 , G11B5/23
CPC分类号： G11B5/127
摘要： PURPOSE:To realize a head excellent in the electromagnetic characteristic and the productivity by selecting a tilt angle of a coil slot side face to a magnetic head face as >=45 deg. so as to make the film thickness thin without losing the characteristic of the magnetic thin film. CONSTITUTION:A magnetic head is constituted with the 1st core half 1, the 2nd core half 2 and an exciting coil 4 wound on a coil slot 3, and magnetic thin films 7, 9 having a high saturated magnetic flux density are formed to core bases 6, 8. In order to make thin the film thickness without losing the characteristic of the magnetic thin films 7, 9, it is required to select a tilt angle thetaof the slot side face 10 of the magnetic gap 5 of the coil slot 3 to the magnetic head face as >=45 deg.. In selecting the tilt angle theta as >=45 deg., the film thickness is made thin without losing the thin film characteristic and the head excellent in the electromagnetic characteristic, wear resistance and productivity is realized.
摘要翻译：目的：通过选择线圈槽侧面与磁头面的倾斜角> 45度，实现电磁特性和生产率优异的头部。以使膜厚度薄而不损失磁性薄膜的特性。构成：磁头由第1铁心半部1，第2铁心半部2和缠绕在线圈槽3上的励磁线圈4构成，具有高饱和磁通密度的磁性薄膜7,9形成于铁芯基体为了使膜厚变薄而不损失磁性薄膜7,9的特性，需要选择线圈槽3的磁隙5的槽侧面10的倾斜角θ，磁头面为> = 45度。在选择倾斜角θ为> = 45度时，膜厚变薄而不损失薄膜特性，电磁特性，耐磨性和生产率优良的头部实现了

66. 发明专利

JPH0799475A DATA COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH0799475A
公开(公告)日：1995-04-11
申请号：JP33673093
申请日：1993-12-28
申请人： HITACHI MAXELL
发明人： NAGAI NOBUYUKI , INAGOYA OSAMU
IPC分类号： H04L27/00 , H04B7/26 , H04M11/00 , H04W88/02 , H04Q7/38
摘要： PURPOSE:To add a crosstalk preventing function to the data communication equipment connecting to a portable personal computer or the like and making data radio communication with a radio transmission reception circuit having a data MODEM function connecting to a telephone line. CONSTITUTION:A local oscillation circuit is formed with transistors (TRs) 1, 2, resistors R1-R6, capacitors C1-C4, a transformer 38, and crystal vibrators 31, 32. The crystal vibrators 31, 32 are connected in parallel in the local oscillation circuit and connected to a base of the TR 1 via an analog switch 34 selectively. A line state check circuit 35 is added to the analog switch and the analog switch is automatically switched on the occurrence of crosstalk. The data communication equipment is made up of the transmission section and the reception section provided with the local oscillation circuit, an antenna and an antenna changeover circuit selecting the antenna into the transmission state or the reception state.

67. 发明专利

JPH03244090A INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPH03244090A
公开(公告)日：1991-10-30
申请号：JP3973590
申请日：1990-02-22
申请人： HITACHI MAXELL
发明人： INAGOYA OSAMU
IPC分类号： G06K1/12 , G06K7/00
摘要： PURPOSE:To increase information capacity while detecting adjacent track loss of a scanning beam by providing a non-print guard band part between respective adjacent information tracks and specifying the width of the guard band. CONSTITUTION:A small square of, for example, about 30X30mum is set as the minimum unit (square dot) 14 of an information pattern and the width of the guard band 16 is set to a value which is >=20% of the scanning-directional length of the minimum unit part of the information pattern and has a margin for track loss detection, e.g. a value which is

68. 发明专利

JPH02173916A MULTITRACK MAGNETIC HEAD AND ITS PRODUCTION 失效
公开(公告)号：JPH02173916A
公开(公告)日：1990-07-05
申请号：JP32806488
申请日：1988-12-27
申请人： HITACHI MAXELL
发明人： NAKAGAWA KAZUNARI , TOTTORI TAKESHI , MIKAMI HIROSUKE , INAGOYA OSAMU , FUJIWARA HIDEO
IPC分类号： G11B5/31 , G11B5/29
摘要： PURPOSE:To omit the assembling work to obtain a high precision by unifying nonmagnetic base bodies where magnetic layers are provided in grooves formed in parallel and at prescribed intervals. CONSTITUTION:Thin film coils 3 are formed on nonmagnetic base bodies 1a and 1b which have grooves filled up with magnetic layers 2a and 2b in parallel and at prescribed intervals, and nonmagnetic base bodies 1a and 1b are so unified that magnetic layers 2a and 2b face each other. That is, grooves of joined non-magnetic base bodies 1a and 1b face each other to form gaps 9, and they are arranged on a straight line along the junction surface of nonmagnetic base bodies 1a and 1b. The pitch of gaps 9 is determined by the working precision of grooves. Thus, the work for gap arrangement is unnecessary, and the pitch precision and the arrangement precision on the straight line of gaps 9 are dependent upon the working precision of a working machine, and precisions are improved.

69. 发明专利

JPH0256710A MAGNETIC HEAD 失效
公开(公告)号：JPH0256710A
公开(公告)日：1990-02-26
申请号：JP20740088
申请日：1988-08-23
申请人： HITACHI MAXELL
发明人： INAGOYA OSAMU
IPC分类号： G11B5/31 , G11B5/187 , G11B5/23
摘要： PURPOSE:To improve a recording and reproducing characteristic by joining two core main bodies opposite through a gap regulation film and making the track width of a magnetic head to form an operating gap into 200 times or below of the gap length. CONSTITUTION:Two flat surfaces of a magnetic film 4 at the rear side of core main bodies 2A and 2B form the rear side joint surface. In a such a magnetic head 1, the head to change variously the relation of a track width Tw and an operating gap length GL is manufactured, the recording and reproducing characteristic of the magnetic head 1 is measured, in the range where the track width Tw exceeds 200 times as much as the operating gap length GL, the conversion output per unit track width is reduced and in the range in which the track width Tw is 200 times or below as much as the operating gap length GL, the conversion output per track width shows an approximately balanced satisfactory output characteristic.

70. 发明专利

JPH01271905A COMPOSITE MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPH01271905A
公开(公告)日：1989-10-31
申请号：JP10026488
申请日：1988-04-25
申请人： HITACHI MAXELL
发明人： TOTTORI TAKESHI , INAGOYA OSAMU , MIKAMI HIROSUKE , NAKAGAWA KAZUNARI , FUJIWARA HIDEO
IPC分类号： G11B5/133 , G11B5/187 , G11B5/23
摘要： PURPOSE:To prevent the generation of cracks in a projecting part and the peeling of a magnetic film by specifying the crystal azimuth of single crystal ferrite blocks and making the width of the tip part of the projecting part smaller than a track width. CONSTITUTION:A composite magnetic head consists of a C-type ferrite block 1 and an I-type ferrite block 1' and they are covered with a magnetic film 2 and bonded with adhesives with an operating gap 6 between. The ferrite blocks 1 and 1' are made of the single crystal of Mn-Zn ferrite or Ni-Zn ferrite and the crystal azimuth of a face opposite to a magnetic recording medium is (211). A width (t) of the tip part of a projecting part 7 is made smaller than a track width T and thus, an expected purpose is attained.

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