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81. 发明专利

JPS60157777A HEAD ACCESS MECHANISM OF MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS60157777A
公开(公告)日：1985-08-19
申请号：JP1228684
申请日：1984-01-25
申请人： FUJITSU LTD
发明人： MIZOSHITA YOSHIBUMI
IPC分类号： H02K33/18 , G11B5/55 , G11B21/02
摘要： PURPOSE:To access a magnetic disc at a high speed by giving a simple constitution to a carriage, which is a main body of a magnetic head access mechanism, without damaging its rigidity. CONSTITUTION:In the head access mechanism, a carriage constituting body 21 as the main body has a plane plate-shaped structure where punched holes 22 are provided in a ceramic plate material, and a part of the carriage constituting body is reinforced by a supporting member 29 to have a rib constitution, and the carraige constituting body 21 has a high rigidity as the whole and is made very light-weight. Consequently, when a movable coil 28 of the head access mechanism is inserted into a fixed magnetic circuit 31 while guided along guide rails 23 in upper and lower end parts, which are provided on the carriage constituting body 21, by a bearing 35 provided in the fixed magnetic circuit 31 to constitute a linear motor between this circuit and the head carriage constituting body, the carriage constituting body 21 is moved straightly at a high speed, and thus, each magnetic head 25 is positioned to a selected track position on a magnetic disc with a high precision.

82. 发明专利

JPS60124020A DETECTING SYSTEM OF HEAD POSITION IN DATA MEMORY DEVICE 失效
公开(公告)号：JPS60124020A
公开(公告)日：1985-07-02
申请号：JP23240683
申请日：1983-12-08
申请人： FUJITSU LTD
发明人： MIZOSHITA YOSHIBUMI , HASEGAWA SUSUMU
IPC分类号： G11B5/596 , G11B21/10
摘要： PURPOSE:To enable the head positioning with high accuracy and with a simple constitution by using a circuit which compares the numbers of pulse signals between odd and even servo tracks and detecting the position of the servo head according to the difference output of said comparison. CONSTITUTION:The total number of pulses SU corresponding to position signal pulses SP is proportional to the shift degree of the center position of a servo head 1 toward a servo track 3 from the boundary between servo tracks 2 and 3 under the control of a gate signal SG-1. While the total number of pulses SD corresponding to the pulse SP produced under the control of a gate signal SG-2 is proportional to the shift degree of the center position of the head 1 toward the track 2 of an odd number from the boundary between both tracks 2 and 3. Therefore these pulses SU and SD are counted respectively and a subtraction is carried out between these two count values to obtain a position shift degree of the head 1. In other words, the position of the head 1 can be detected.

83. 发明专利

JPS59227066A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS59227066A
公开(公告)日：1984-12-20
申请号：JP10345883
申请日：1983-06-08
申请人： FUJITSU LTD
发明人： MIZOSHITA YOSHIBUMI
IPC分类号： G11B21/20 , G11B5/48 , G11B5/55 , G11B5/82 , G11B21/02 , G11B21/21 , G11B33/14 , G11B17/32
摘要： PURPOSE:To constitute a titled device so that a magnetic head is scarcely shifted from a track position due to the temperature variation of the inside of a device by forming a magnetic disk by a glass plate having a magnetic layer on the surface, and also forming a magnetic head supporting arm of a magnetic head driving assembly by alumina or silicon nitride. CONSTITUTION:An arm 11 of a magnetic disk device is formed by sintering a silicon nitride which is approximate to the coefficient of thermal expansion of a tempered glass and also has the value of an extremely small coefficient of thermal expansion, in the shape of a thin rectangular parallelepiped by using a mold jig. Also, one end part of this arm 11 is attached to the prescribed position of a truck 4 by metallic fittings 12, and on its other end part, a metallic gimbals structure body 13 which holds the magnetic head consisting of a slider and a coil, and also moves up and down freely is installed. This sintered body of silicon nitride is higher than the glass as to its hardness, and it is scarcely damaged by a shock. Also, a magnetic disk uses a glass substrate whose hardness is high and also whose surface working accuracy is high, and forms a magnetic film consisting of gamma-Fe2O3 on its surface by a spattering method.

84. 发明专利

JPS59210576A Magnetic disk access device 失效
标题翻译：磁盘访问设备
公开(公告)号：JPS59210576A
公开(公告)日：1984-11-29
申请号：JP8449283
申请日：1983-05-13
申请人： Fujitsu Ltd
发明人： MIZOSHITA YOSHIBUMI
IPC分类号： G11B21/02 , G11B5/48 , G11B5/55
CPC分类号： G11B5/5521 , G11B5/48
摘要： PURPOSE:To enable to mount many magnetic heads on a flat platelike magnetic head driving device of reduced weight by placing a flat platelike truck on a plane perpendicular to the plane of a magnetic disk. CONSTITUTION:A flat platelike truck 19 is provided vertically, and tapered slanted guide parts 25 are formed above and below the truck 19 and fixed to the base plate 3 of an accessing device, and moved forward and backward guided correctly by an outer rings of ball bearings 26 provided on both sides of above-mentioned slanted guide part 25. Plural magnetic head arms 6 are attached to a flange 27 for mounting magnetic head 5 placed in a body at the tip of the flat platelike truck 19 in multiple steps with screws. By such constitution, the weight of unified part of the truck and movable part is reduced, and the mechanical vibration due to reaction force can be reduced, and the multiple headed high speed magnetic disk device can be constituted.
摘要翻译：目的：通过将平板式卡车放置在垂直于磁盘平面的平面上，能够将许多磁头安装在平板状磁头驱动装置上。构成：垂直设置平板式车辆19，在卡车19的上下形成有倾斜的倾斜引导部25，并固定在通路装置的基板3上，并通过球的外圈正向和反向地引导轴承26设置在上述倾斜导向部分25的两侧。多个磁头臂6附接到凸缘27，凸缘27用螺钉将多个台阶安装在平板式车辆19的前端的主体上安装磁头5。通过这样的结构，能够减轻卡车和可动部件的统一部分的重量，可以减少由于反作用力引起的机械振动，能够构成多头高速磁盘装置。

85. 发明专利

JPS59117759A Positioning control system of magnetic head 失效
标题翻译：磁头定位控制系统
公开(公告)号：JPS59117759A
公开(公告)日：1984-07-07
申请号：JP23313182
申请日：1982-12-24
申请人： Fujitsu Ltd
发明人： MIZOSHITA YOSHIBUMI , HASEGAWA SUSUMU
IPC分类号： G05D3/12 , G05B7/02 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B5/596
摘要： PURPOSE:To attain the head positioning control in excellent way with simple constitution by matching a position gain setting value at position control mode to a speed profile value near an object position of a magnetic head so as to perform both speed and position control modes by a common use circuit. CONSTITUTION:An operating device 24 is feedback-controlled via a speed gain setting device 27 in response to an error between a value of a speed profile signal 101 outputted from a speed profile generating circuit 22 in response to an object position signal and a converting speed signal outputted from a speed signal converter 26 according to a head position signal from the operating device 24. The gain of this setting device 27 is set to a value equal to a slope of a linear region near the track position of the signal 101 and the speed control mode for head positioning and the succeeding position control mode are performed by using the same circuit in common. Thus, the positioning control of the head is performed with simple constitution without overshoot or undershoot in excellent way because the changeover of each mode is not required.
摘要翻译：目的：通过将位置控制模式下的位置增益设定值与磁头的物体位置附近的速度曲线值进行匹配，以简单的结构实现头位置控制，以便通过一个位置控制模式执行速度和位置控制模式常用电路。构成：响应于从速度分布图生成电路22输出的速度分布信号101的值与对象位置信号和转换速度之间的误差，经由速度增益设定装置27对操作装置24进行反馈控制根据来自操作装置24的头位置信号从速度信号转换器26输出的信号。该设定装置27的增益被设定为与信号101的轨迹位置附近的线性区域的斜率相等的值，通过使用相同的电路来执行头部定位的速度控制模式和后续位置控制模式。因此，由于不需要每种模式的切换，所以头部的定位控制以简单的结构执行而没有过冲或下冲。

86. 发明专利

JPS58102364A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS58102364A
公开(公告)日：1983-06-17
申请号：JP20008181
申请日：1981-12-14
申请人： FUJITSU LTD
发明人： ARIGA TAKAHARU , MIZOSHITA YOSHIBUMI , OKADA SHINJI
IPC分类号： G11B19/20 , G11B25/04
摘要： PURPOSE:To obtain high airtightness through easy assembling, by making splitting section of a housing body and a cover parallel to a spindle, and separating shaft holes for supporting bearings of the spindle from the splitting section. CONSTITUTION:The screw of a disk holder is engaged threadedly with a screw hole 5 to hold a magnetic disk 1, which is inserted into a housing body 11. The length of a spindle 2 including bearing housings 3 is set shorter than the distance between both side walls 11a and 11b of the housing body 11 to insert the spindle 2 into the housing body. The splitting section 29 between a cover 21 and the housing body 11 is parallel to the spindle 2 during assembling operation and bearing holes 13 for supporting the spindle 2 are formed separately from the split surface 29, so the section 29 is one successive plane. Supporting members 14 for supporting the bearing housings 3 from outside of the shaft holes 13 are equipped to the housing body 11.

87. 发明专利

JPS5774869A Magnetic disk device 失效
标题翻译：磁盘设备
公开(公告)号：JPS5774869A
公开(公告)日：1982-05-11
申请号：JP15157180
申请日：1980-10-29
申请人： Fujitsu Ltd
发明人： MIZOSHITA YOSHIBUMI
IPC分类号： G11B33/14 , G11B17/038 , G11B23/00 , G11B23/03 , G11B23/50
CPC分类号： G11B17/038 , G11B23/0323 , G11B23/507
摘要： PURPOSE: To reduce a temperature difference in the upper and lower overlapping direction, by providing on a hub 1 or more each of two kinds of independent air holes passing through magnetic disks from the upper and lower sides around the center of the spindle, and mixing air being in the proximity of the upper and lower sides of the spindle, in the space of the disks.
CONSTITUTION: This magnetic disk device is a center type by which both the upper and lower ends of a spindle are supported by bearings 11, 12. A magnetic disk 4 is installed to the spindle 10 through a hub 13, and is placed at equal intervals by a spacer 14. A space A of the lower part of the hub 13 leads to a gap of the magnetic disk 4 through an air hole 15, and air which has flowed in from the space A flows in the direction of the outside circumference of the disk 4. In the same way, an air hole 16 leads to a gap of each disk 4 from the upper space B of the hub 13, and air which has flowed in from the space B flows in the direction of the outside circumference of the disk 4 by rotation of the disk. In this way, 2 kinds of air holes 15, 16 are provided alternately on the outside circumferential part of the hub, and air flowing in from thw upper and lower parts of the disk 4 are mixed uniformly.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：为了减少上，下重叠方向的温差，通过在主轴的中心周围的上下两侧通过磁盘的两个独立空气孔的轮毂1上设置1个以上，并混合空气位于主轴的上侧和下侧附近，在盘的空间中。构成：该磁盘装置是主轴的上端和下端由轴承11,12支撑的中心型。磁盘4通过轮毂13安装到主轴10上，并以等间隔放置轮毂13的下部的空间A通过空气孔15导向磁盘4的间隙，从空间A流入的空气沿着外周的方向流动以相同的方式，空气孔16从轮毂13的上部空间B通向每个盘4的间隙，并且从空间B流入的空气沿着外周的方向流动磁盘4通过盘的旋转。以这种方式，在轮毂的外周部交替地设置2种气孔15,16，并且从盘4的上部和下部流入的空气被均匀地混合。

88. 发明专利

JPS51126486A POSITIONING CONTROL SYSTEM 失效
公开(公告)号：JPS51126486A
公开(公告)日：1976-11-04
申请号：JP5095875
申请日：1975-04-25
申请人： FUJITSU LTD
发明人： NIINUMA ATSUO , HIYAKON MASAO , MIZOSHITA YOSHIBUMI
IPC分类号： G05D3/12 , G05B11/10 , G05D3/00 , G11B21/10
摘要： PURPOSE:To shorten a distance of a fine control section of fine coarse controls and to reduce a required time for positioning.

89. 发明专利

JP2003151109A MAGNETO-RESISTIVE EFFECT HEAD AND MAGNETIC RECORDING/ REPRODUCING HEAD 审中-公开
公开(公告)号：JP2003151109A
公开(公告)日：2003-05-23
申请号：JP2002238454
申请日：2002-08-19
申请人： FUJITSU LTD
发明人： OTSUKA YOSHINORI , KOSHIKAWA YOSHIO , MIZOSHITA YOSHIBUMI , UEHARA YUJI , KANDA HIDEKAZU , AOSHIMA KENICHI , KANAI HITOSHI , KANE JIYUNICHI
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To suppress thermal asperity which causes base line fluctuation of a reproducing signal regarding a magnetic disk device, and a magneto-resistive effect head used for a magnetic recording device such as a magnetic tape device or the like. SOLUTION: This device includes a first magnetic shield layer 56, a magneto- resistive effect element 58 formed across a first gap on the first magnetic shield layer 56, a second magnetic shield layer 62 formed across a second gap on the magneto-resistive effect element 58, and an element Rsm having a negative resistance coefficient which is formed between the first magnetic shield layer 56 and the second magnetic shield layer 62 and near the magneto-resistive effect element 58.

90. 发明专利

JP2002015413A HEAD SLIDER ASSEMBLY 失效
公开(公告)号：JP2002015413A
公开(公告)日：2002-01-18
申请号：JP2001168880
申请日：2001-06-04
申请人： FUJITSU LTD
发明人： OE TAKESHI , MIZOSHITA YOSHIBUMI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To improve reliability of electrical connection between a head slider and a head slider support, regarding a head slider assembly. SOLUTION: A magnetic head slider 35 is provided with four terminals 100A to 100D disposed in a row. A magnetic head slider fixing part 30 is provided with four terminals 94A to 94D disposed in a row, and wiring patterns 93 and 94 extended from the terminals 94A to 94D. The terminals 100A to 100D of the magnetic head slider 35, and the terminals 94A to 94D of the magnetic head fixing part 30 are disposed perpendicularly and oppositely to each other, and press-connected by gold-plated balls 101A to 101D.

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