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11. 发明专利

JPH04109895A MOTOR 失效
公开(公告)号：JPH04109895A
公开(公告)日：1992-04-10
申请号：JP22648990
申请日：1990-08-30
申请人： FUJITSU LTD
发明人： IMAMURA TAKAHIRO , KIMIHIRA TORU , MIZOSHITA YOSHIBUMI , ARIGA TAKAHARU
IPC分类号： H02P1/52 , H02K29/00 , H02K29/03 , H02P6/06 , H02P6/08 , H02P6/17 , H02P6/182 , H02P6/20
摘要： PURPOSE:To increase a no load revolution and a starting torque by a method wherein DC currents or low frequency currents are applied to coils at the time of start and, after the start, high frequency currents are applied to the coils to drive a motor. CONSTITUTION:At the time of start, as driving currents outputted from respective amplifiers 31, 32 and 33 are currents which are modulated by PWM with a carrier frequency as low as several tens - several hundreds of Hertz, the impedances of respective capacitors 71, 72 and 73 are sufficiently higher than the impedance of auxiliary coils 61, 62 and 63 and hence the driving currents are applied to main coils 51, 52 and 53 and the corresponding auxiliary coils 61, 62 and 63 respectively in series. In this state, a torque constant is large and a large starting torque is generated. Then, when a revolution reaches a certain value after the start, the oscillation frequency of an oscillator 8 is increased to several kilo Herz to several tens of kilo Hertz. In this state, the currents applied to the coils 51, 52 and 53 are bypassed by the capacitors 71, 72 and 73. As a result, an apparent torque constant is reduced and a no load revolution can be increased.

12. 发明专利

JPH03263650A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH03263650A
公开(公告)日：1991-11-25
申请号：JP6007590
申请日：1990-03-13
申请人： FUJITSU LTD
发明人： OE TAKESHI , IMAMURA TAKAHIRO
IPC分类号： G11B23/03 , G11B17/038 , G11B23/00
摘要： PURPOSE:To reduce the positional deviation of a magnetic disk in the direction of a spindle shaft by providing the flange of a spindle hub to almost the center in the upper and lower direction of the spindle hub and laminating the magnetic disk and a spacing ring from both upper and lower directions of the flange. CONSTITUTION:The spindle hub 3 is fitted to the spindle shaft 1 through roll bearings 2 and 2' so that it can be rotated. Then, the flange 4 for laminating the magnetic disk 5 is provided to almost the center of the hub 3 in the upper and lower direction (the shaft direction) of the hub 3. The plural magnetic disks 5 are laminated on the upper surface and the lower surface of the flange 4 alternately with the spacing ring 6 and the upper most layer thereof is pressed and fixed by a screw 8 through a clamp ring 7. Thus, the positional deviation quantity of the laminated magnetic disk 5 in the upper and lower direction is reduced. Besides, the precise floating quantity of a head is obtained.

13. 发明专利

JPH03259488A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH03259488A
公开(公告)日：1991-11-19
申请号：JP5642290
申请日：1990-03-09
申请人： FUJITSU LTD
发明人： IMAMURA TAKAHIRO , ARIGA TAKAHARU , YAMADA TOMOYOSHI , MIZOSHITA YOSHIBUMI
IPC分类号： G11B33/08 , G11B23/03
摘要： PURPOSE:To improve the vibration proof effect and to ensure the required positioning accuracy without a large sized device by setting a support system resonance frequency including a vibration proof support at the outside of at least a range of 1/5-1/4 in a band of a servo control system controlling a drive section. CONSTITUTION:An enclosure 14 is supported by a vibration proof support 15 made of a rubber or the like and the vibration proof support 15 is expressed by an equivalent circuit comprising a spring constant and a damping constant and the support system including the vibration proof support 15 has a resonance frequency fsus. When the resonance frequency fsus of the support system and an acceleration frequency fs with respect to the enclosure 4 or a frame 6 are coincident, the positioning error is at a maximum. The detrimental state is caused within a range of 1/5-1/4 of a band fD of the servo control system. Then the resonance frequency Fsus of the support system is set to the outside of the range. Thus, the vibration proof effect is improved without excess decrease in the resonance frequency fsus of the support system and the interval between the enclosure 4 and the frame 6 is made narrow.

14. 发明专利

JPH03104080A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH03104080A
公开(公告)日：1991-05-01
申请号：JP24019889
申请日：1989-09-18
申请人： FUJITSU LTD
发明人： SUGIMOTO MASAHARU , ARIGA TAKAHARU , IMAMURA TAKAHIRO , YAMADA TOMOYOSHI
IPC分类号： G11B33/08
摘要： PURPOSE:To prevent positioning error to vibration, etc., from being increased by supporting an enclosure to a frame by plural vibration proof supporting bodies so that primary moment around the center of gravity can be balanced to parallel inputs from an external part. CONSTITUTION:Distances L1-L5 for arranging vibration proofing rubbers 15a-15c to a center 20 of gravity of an enclosure 14 and respective spring constants Ks and Kc of the vibration proofing rubbers 15a-15c are selected so as to satisfy the two formulas of L1.Kc+L1.Kc-L2.Ks=0 and L3.Ks+L5.Kc-L4.Ks=0. As a result, the primary moment around the center 20 of gravity can be bal anced to the vibration inputs from the external part in X and Y directions. Accordingly, since a rotating operation component is not generated in the enclo sure 14, the positioning error is not generated.

15. 发明专利

JPH0274143A SWING MOTOR FOR HEAD ACCESS 失效
公开(公告)号：JPH0274143A
公开(公告)日：1990-03-14
申请号：JP22470588
申请日：1988-09-09
申请人： FUJITSU LTD
发明人： MAETA HIROSHI , ARIGA TAKAHARU , SUZUKI NORIHIKO , YAMADA TOMOYOSHI , IMAMURA TAKAHIRO
IPC分类号： G11B21/02 , H02K33/16
摘要： PURPOSE:To improve access speed and accuracy of motor by performing connection such that current flows in same direction through the parallel sections located in the center of all coils. CONSTITUTION:Outside coils 2A, 3A located in the central section are contacted tightly while inside coils 2B, 3B arranged at the inside of the outside coils 2A, 3A are contacted tightly to the central side so that a gap (d) is provided between the parallel section PA of the outside coil 2A, 3A at the end side of a yoke and the parallel section PB of the inside coil 2B, 3B. Only one magnet 7 faces with the flat coil in the central section and magnets 6, 8 at the opposite sides thereof are fixed to a rotor 4 while facing with the gap (d). Curves (a), (b) represent distribution of force constant Bl respectively for 0 gap and (d) gap. When the gap (d) is provided the force constant Bl drops by several % compared with 0 gap, but flat distribution of force constant Bl is achieved and thereby uniform torque can be produced over the entire rolling range of a rolling motor and the torque is also improved.

16. 发明专利

JPS6441865A ACCELERATION SENSOR UNIT 失效
公开(公告)号：JPS6441865A
公开(公告)日：1989-02-14
申请号：JP19889387
申请日：1987-08-08
申请人： FUJITSU LTD
发明人： ARIGA TAKAHARU , SUZUKI NORIHIKO , IMAMURA TAKAHIRO , MAETA HIROSHI
IPC分类号： G01P15/08 , G01P15/09
摘要： PURPOSE:To suppress variations in output due to a temperature coefficient proper to a sensor, by arranging an acceleration sensor and an amplification means for a sensor output in the same box body while a temperature compensation resistance is provided close to the sensor. CONSTITUTION:An acceleration sensor 2 comprising a piezo-electric element 3 and a weight 4 is provided in a housing 1 while a printed board 5 is mounted at a top opening of the housing 1 and an inversion amplification circuit (or non-inversion amplification circuit) 6 is provided on the printed board 5 to amplify an output of the acceleration sensor 2. A temperature compensation resistance element 8 is provided having a positive temperature coefficient equal to a temperature coefficient of the piezo-electric element 3 to be used as input resistance Rs of the amplification circuit 6. This enables the realization of a highly stable acceleration sensor with limited output variation regardless of temperature changes.

17. 发明专利

JP2009187595A Head slider having heater and information storage device 审中-公开
标题翻译：具有加热器和信息存储设备的头滑块
公开(公告)号：JP2009187595A
公开(公告)日：2009-08-20
申请号：JP2008023051
申请日：2008-02-01
申请人： Fujitsu Ltd , 富士通株式会社
发明人： FUJIMAKI TORU , IMAMURA TAKAHIRO , IUMI YOSHIAKI
IPC分类号： G11B5/31 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To reduce distance between a reproducing head and a disk when energizing a heater, in a head slider containing a head composed of a reproducing head and a recording head, and a heater.
SOLUTION: A head slider 15 including both a reproducing head 13 and a recording head 19 provided at a support 15S adjacent to a flow-out side of air of a head slider 15, includes: a pair of heaters 31, 32 provided at a flow-in side and a flow-out side of air of the reproducing head 13 so as to hold the reproducing head 13 between them; a pair of heaters 33, 34 provided at a flow-in side and a flow-out side of air of the recording head 19 so as to hold the recording head 19 between them; and a thermal expansion material 40 having the thermal expansion coefficient lower than the support 15S arranged at the support 15S between the heater 32 and the heater 33. The reproducing head 13 and the recording head 19 are moved very close to the disk side when the heaters 31-34 are energized, then reproducing and recording performance of the head slider 15 is improved.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：在包含由再现头和记录头构成的头部的头部滑动头和加热器中时，为了减少加热器通电时的再现头和盘之间的距离。解决方案：包括设置在与头滑块15的空气流出侧相邻的支撑件15S处的再现头13和记录头19的头滑块15包括：一对加热器31,32，在再现头13的空气的流入侧和流出侧，以便将再现头13保持在它们之间; 设置在记录头19的空气的流入侧和流出侧的一对加热器33,34，以便将记录头19保持在它们之间; 以及热膨胀系数40，其热膨胀系数低于设置在加热器32和加热器33之间的支撑件15S处的支撑件15S。当加热器 31-34被通电，从而提高了磁头滑块15的再现和记录性能。版权所有（C）2009，JPO＆INPIT

18. 发明专利

JP2009180672A Atmospheric pressure measuring apparatus and method of measuring atmospheric pressure 审中-公开
标题翻译：大气压力测量装置及测量大气压力的方法
公开(公告)号：JP2009180672A
公开(公告)日：2009-08-13
申请号：JP2008021462
申请日：2008-01-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUZUKI YOSHIMUNE , IMAMURA TAKAHIRO
IPC分类号： G01L11/00
CPC分类号： G01L11/04
摘要： PROBLEM TO BE SOLVED: To provide an atmospheric pressure measuring apparatus and an atmospheric pressure measurement method for simplifying a structure, and readily measuring the atmospheric pressure. SOLUTION: The atmospheric pressure measuring apparatus 24 includes a transmitter 52 for transmitting sound waves, and a receiver 58 facing the transmitter 52. Sound waves are transmitted from the transmitter 52, and received by the receiver 58. The control section 75 detects the atmospheric pressure, based on the magnitude of the sound waves received by the receiver 58. The sound waves transmitted from the transmitter 52 is propagated in the air, when the atmospheric pressure measuring apparatus 24 measures the atmospheric pressure. The receiver 58 receives the sound waves. Since the magnitude of the sound waves is changed, in response to a change in the atmospheric pressure, the atmospheric pressure is measured based on the strength of the sound wave received by the receiver 58. In this way, atmospheric pressure is easily measured by using a the simplified structure. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于简化结构并容易测量大气压力的大气压测量装置和大气压测量方法。解决方案：大气压测量装置24包括用于传输声波的发射器52和面向发射机52的接收机58.声波从发射机52发射并由接收机58接收。控制部分75检测大气压力，基于由接收器58接收的声波的大小。当大气压力测量装置24测量大气压力时，从发射器52发射的声波在空气中传播。接收器58接收声波。由于声波的大小改变，响应于大气压力的变化，基于由接收器58接收的声波的强度来测量大气压力。以这种方式，通过使用大气压力容易地测量一个简化的结构。版权所有（C）2009，JPO＆INPIT

19. 发明专利

JP2007299452A Information recording/reproducing device, and method for detecting space between head and medium 有权
标题翻译：信息记录/再现装置，以及用于检测头和中间之间的空间的方法
公开(公告)号：JP2007299452A
公开(公告)日：2007-11-15
申请号：JP2006125161
申请日：2006-04-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： IUMI YOSHIAKI , IIDA ATSUO , IMAMURA TAKAHIRO , FUJIMAKI TORU , YOKOHATA TORU
IPC分类号： G11B21/21
CPC分类号： G11B5/6005 , G11B5/6064
摘要： PROBLEM TO BE SOLVED: To provide an information recording/reproducing device and a zero point detection method which can reduce the number of times of, and the time of contact between a head and a medium as much as possible, and can therefore minimize the occurrence of failures caused by the contact.
SOLUTION: The method for detecting space between the head and the medium in the information recording/reproducing device for recording/reproducing information onto/from the recording medium by using the head comprises: gradually reducing minimum space between the head and the recording medium while alternatively changing the size of space between the head and the recording medium to large and small; detecting a signal for judging contact between the hear or a slider including the head and the recording medium; stopping, upon judgment of the contact between the head or the slider including the head and the recording medium, the operation of the driving step to retreat the head away from the recording medium to a predetermined position; and obtaining the driving amount of the head when the contact is detected.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供可以尽可能地减少头部和介质之间的接触次数和时间的信息记录/再现装置和零点检测方法，因此可以尽可能减少因接触引起的故障的发生。解决方案：用于检测信息记录/再现装置中的头部和介质之间的空间的方法，用于通过使用头将信息记录/从记录介质再现信息包括：逐渐减小头部和记录之间的最小空间介质，同时可以将头部和记录介质之间的空间大小改变为大小; 检测用于判断听筒或包括头部和记录介质的滑块之间的接触的信号; 在判断包括头部和记录介质的头部或滑块之间的接触的判断中，停止将头部从记录介质退回到预定位置的驱动步骤的操作; 并且当检测到接触时获得头的驱动量。版权所有（C）2008，JPO＆INPIT

20. 发明专利

JP2007272978A Head flying height measuring unit in magnetic storage 审中-公开
标题翻译：磁悬浮高度测量装置
公开(公告)号：JP2007272978A
公开(公告)日：2007-10-18
申请号：JP2006096031
申请日：2006-03-30
申请人： Fujitsu Ltd , 富士通株式会社
发明人： YOKOHATA TORU , IMAMURA TAKAHIRO , IIDA ATSUO
IPC分类号： G11B5/09 , G11B21/21
CPC分类号： G11B5/6029 , G11B5/6005 , G11B2220/2516
摘要： PROBLEM TO BE SOLVED: To provide a head flying height measuring unit which can more accurately estimate the flying height of the head.
SOLUTION: This measuring unit first DC-erases the magnetic recording medium and reads the noise to check the noise level of the device, and writes test signals containing fundamental components and third harmonic components on the magnetic recording medium. It reads the written test signals and Fourier transforms the read signals to obtain the amplitudes of the fundamental components and the third harmonic components. It checks whether or not the amplitudes of the third harmonic components are large enough as compared to the noise level obtained before. When large enough, the flying height of the head is estimated by using both the fundamental components and the third harmonic components. But when not large enough, only the fundamental components is used for estimation.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种可以更精确地估计头部飞行高度的头部飞行高度测量单元。
解决方案：该测量单元首先直流 - 擦除磁记录介质并读取噪声，以检查设备的噪声电平，并将包含基波分量和三次谐波分量的测试信号写在磁记录介质上。它读取写入的测试信号并对读取的信号进行傅里叶变换，以获得基波分量和三次谐波分量的振幅。它与以前获得的噪声水平相比，检查三次谐波分量的振幅是否足够大。当足够大时，通过使用基本分量和三次谐波分量来估计头部的飞行高度。但是，如果不够大，只能使用基本的组件进行估计。版权所有（C）2008，JPO＆INPIT

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