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21. 发明专利

JP2001236776A DISK DEVICE 失效
公开(公告)号：JP2001236776A
公开(公告)日：2001-08-31
申请号：JP2000048901
申请日：2000-02-21
申请人： HITACHI LTD
发明人： TAGUCHI HIROBUMI , NAGAI KYUICHIRO
IPC分类号： G11B33/08
摘要： PROBLEM TO BE SOLVED: To reduce the noise over the entire part of a disk device by reducing the fluid sound generated when a disk rotates at a high speed. SOLUTION: This disk device has a projecting segment of a columnar shape and/or prismatic shape and/or wing shape and/or elliptic cylinder shape on the disk surface side of its cover.

22. 发明专利

JP2001023344A OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE 失效
公开(公告)号：JP2001023344A
公开(公告)日：2001-01-26
申请号：JP19122699
申请日：1999-07-06
申请人： HITACHI LTD
发明人： INOUE ATSUSHI , KISHI YUJI , OKAMOTO TOMOMI , NAGAI KYUICHIRO
IPC分类号： G11B23/50
摘要： PROBLEM TO BE SOLVED: To prevent trouble on recording/reproducing of data caused by soiling or the like stuck on the surface of a disk by driving a cleaning means provided at actuator parts in the radial direction of a disk medium with an optical pickup device driving means. SOLUTION: An optical pickup device is provided with an objective lens 12, an actuator 102 for driving the objective lens 12 or the like in an optical pickup cabinet 101. Further a cleaning member 1 for removing soiling, stuck foreign matter or the like on the surface of the disk 5 is provided near the objective lens 12 provided on the actuator 102. The optical pickup cabinet 101 is reciprocated between an inner periphery and an outer periphery in the radial direction of the disk 5 along shafts 21, 22 by a driving motor 20 via a driving force transmission means 13. When cleaning, the cleaning member 1 is brought into contact with the surface of the disk 5 by the actuator 102 to clean the surface of the disk 5.

23. 发明专利

JP2000040327A DISK CARTRIDGE 失效
公开(公告)号：JP2000040327A
公开(公告)日：2000-02-08
申请号：JP21315099
申请日：1999-07-28
申请人： HITACHI LTD
发明人： OKAMOTO TOMOMI , NAGAI KYUICHIRO
IPC分类号： G11B23/03
摘要： PROBLEM TO BE SOLVED: To enable the execution of the movement of a disk information at the movement of the disk between different cartridges by constituting a disk holding member in such a manner that this member releases the holding of the recording medium when mounted at a disk cartridge and holds the recording medium and enables the removal of the recording medium together with the disk holder when the recording medium is removed from the disk cartridge. SOLUTION: The disk holder 5 removable from a disk cartridge body 1a is arranged in a portion where this holder faces the surface to be arranged with a shutter 3a and the detention is released by removing detaining pawls 6 mounted by detaining pawls 6. Sensing areas 14a to 14d, 15a to 15b for having the information of the disk discriminated by a recording/reproducing device are installed at the disk holder 5 to hold the instrument by one side each. The recording/reproducing device is made capable of previously detecting the information of the disk 4 in the disk cartridge 17a by reading the information of these sensing areas.

24. 发明专利

JP2000011577A DISK CARTRIDGE AND DISK DEVICE USING THE SAME 失效
公开(公告)号：JP2000011577A
公开(公告)日：2000-01-14
申请号：JP18188898
申请日：1998-06-29
申请人： HITACHI LTD
发明人： OKAMOTO TOMOMI , NAGAI KYUICHIRO , ONO HIROAKI , INOUE ATSUSHI , TANEMURA TOSHIO
IPC分类号： G11B23/03 , G11B19/04 , G11B19/12 , G11B23/28
摘要： PROBLEM TO BE SOLVED: To allocate information to an information holding part by considering the priority of the information arranged in a disk cartridge and to dispose the necessary information holding part in a prescribed place by contriving the same. SOLUTION: At least two kinds of information held by a disk cartridge 1 are variable, bits of the variable information are 1 bit for A and B, and in the case of an information group where low-order information is valid when high-order information is A and the low-order information is invalid when the high-order information is B, information held by a variable information holding part is changed in three ways, and the groups of high and low order information are held in variable information holding parts 13a and 13b.

25. 发明专利

JP2000011576A DISK CARTRIDGE AND DISK DEVICE USING THE SAME 失效
公开(公告)号：JP2000011576A
公开(公告)日：2000-01-14
申请号：JP17691098
申请日：1998-06-24
申请人： HITACHI LTD
发明人： OKAMOTO TOMOMI , NAGAI KYUICHIRO , ONO HIROAKI , INOUE ATSUSHI
IPC分类号： G11B23/03 , G11B19/04 , G11B23/28
摘要： PROBLEM TO BE SOLVED: To improve the efficiency in the arrangement of information holding parts by changing the holding information in such a manner that at least two of the provided informations regarding a recording medium or a disk cartridge are variable and a part of them is made movable, and providing the overlapped area in the movable range of the 1st information holding part and the movable range of the 2nd information holding part. SOLUTION: The information of validity/invalidity for the disk surface is assigned to the 1st information holding parts 11a, 11b, the historical information of the disk taking out is assigned to the 2nd information holding parts 12a, 12b, the information of need/no need of the verifying operation is assigned to the 3rd information holding parts 13a, 13b, and the information of permission/unpermission of the recording is assigned to the 4th information holding parts 14a, 14b. The 1st information holding parts 11a, 11b are expressed by providing or not providing holes at the prescribed positions. The 2nd information holding parts 12a, 12b are irreversible, and when a member 17 for opening/closing a loading/unloading port is housed in a disk cartridge case 2, protrusions are arranged at the places coincident with those of the 2nd information holding parts 12a, 12b so as capable of recognizing by providing holes at the case position.

26. 发明专利

JP2567905B2 失效
公开(公告)号：JP2567905B2
公开(公告)日：1996-12-25
申请号：JP9180888
申请日：1988-04-15
申请人： HITACHI LTD
发明人： TAKEDA HIDEKAZU , OGIJI KENJI , KAKU NOBUYUKI , NAGAI KYUICHIRO
IPC分类号： G11B15/665

27. 发明专利

JP2002184167A DISK UNIT 失效
公开(公告)号：JP2002184167A
公开(公告)日：2002-06-28
申请号：JP2000377985
申请日：2000-12-07
申请人： HITACHI LTD
发明人： TAGUCHI HIROBUMI , NAGAI KYUICHIRO
IPC分类号： G11B33/14 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To suppress temperature rise caused by heat generated by a movable laser section by blowing air. SOLUTION: The disk unit is provided with a disk motor which drives a disk rotationally, a laser element, an optional system which converges light beams radiated from the element on the information recording surface of the disk and irradiates a light receiving element with the reflected light beams from the information recording surface and a circuit board having a control system which controls the operations of the motor and the laser elements, etc., and a signal processing system which processes the signals obtained from the light beams received by the light receiving element. Cooling is conducted by providing a mechanism which blows air to the laser section in the unit.

28. 发明专利

JP2002184166A DISK UNIT 失效
公开(公告)号：JP2002184166A
公开(公告)日：2002-06-28
申请号：JP2000377984
申请日：2000-12-07
申请人： HITACHI LTD
发明人： TAGUCHI HIROBUMI , NAGAI KYUICHIRO
IPC分类号： G11B33/14 , G11B7/125 , H01S5/024
摘要： PROBLEM TO BE SOLVED: To prolong the service life of a laser and to realize high reliability of the laser by cooling off temperature rise caused by heat generated by a movable laser section. SOLUTION: A Peltier element, heat radiating fins and a cooling fan are arranged for a laser portion of a disk unit to conduct forced cooling.

29. 发明专利

JP2001338460A DISK DEVICE 失效
公开(公告)号：JP2001338460A
公开(公告)日：2001-12-07
申请号：JP2000159541
申请日：2000-05-25
申请人： HITACHI LTD
发明人： TAGUCHI HIROBUMI , NAGAI KYUICHIRO
IPC分类号： G11B33/14 , G11B7/125 , G11B19/02 , G11B19/04
摘要： PROBLEM TO BE SOLVED: To reduce a temperature increase in a pickup part, and to stabilize and prolong the life of laser beam emission by absorbing heat generated by a movable laser beam emission part, and shielding off heat generated from a circuit board. SOLUTION: This disk device is provided with a heat conducting member for moving heat in a laser holder part, and a heat absorbing member inside. The disk device is further provided with a temperature sensor, and a temperature control system. Also in this case, a heat insulator is loaded between the circuit board for device control and a mechanical base including the laser holder.

30. 发明专利

JP2001332008A DISK DEVICE 失效
公开(公告)号：JP2001332008A
公开(公告)日：2001-11-30
申请号：JP2000152741
申请日：2000-05-19
申请人： HITACHI LTD
发明人： OKAMOTO TOMOMI , NAGAI KYUICHIRO , TAGUCHI HIROBUMI
IPC分类号： F16F15/02 , G11B19/04 , G11B19/06 , G11B19/20
摘要： PROBLEM TO BE SOLVED: To solve the following problems with a centrifugal force cancellation method by a correction motor; this method has the problem that the absolute quantity of the correctable centrifugal force cannot be changed; its structure makes the uneven centroid quantity of the correction motor invariable; the centrifugal force is proportional to the square of the number of revolutions but in order to negate the centrifugal force of an uneven centroid disk, the number of revolutions of the correction motor is required to be made the same as the number of revolutions of the uneven centroid disk and the changing of the centrifugal force by changing the number of revolutions is not possible; since the optical disks are exchangeable media, the disks having various kinds of the uneven centroid are used and the adequate operation taking the variation in the uneven centroid of the disks into consideration is required for the correction motor. SOLUTION: In the case of a recording medium which attains a1>a2 when the vibration acceleration of the same frequency as the rotating frequency detected by an acceleration detecting means, when only the recording medium rotates, is defined as a1 and the vibration acceleration of the same frequency as the rotating frequency detected by the acceleration detecting means, when only the rotating section is rotated at the nearly the same number of revolutions as the number of revolutions of the recording medium, is defined as a2, the rotating section is rotated by a second rotating means at nearly the same number of revolutions as the number of revolutions of the recording medium and at the phase at which the vibration is minimized, and the rotating section is stopped when the recording medium of a1

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