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1. 发明专利

JP2000128414A PAPER SHEET COLLECTING DEVICE 失效
公开(公告)号：JP2000128414A
公开(公告)日：2000-05-09
申请号：JP30806798
申请日：1998-10-29
申请人： HITACHI LTD , HITACHI ASAHI ELECTRON KK
发明人： ICHIKAWA RYOICHI , FURUDONO MASUO , KATO RIICHI , SHIBATA SHINJI
IPC分类号： B65H29/68 , B65H29/40
摘要： PROBLEM TO BE SOLVED: To provide a high-performance device collecting any paper sheets regardless of their shapes and states by stopping near the rear end of the delivered paper sheets, retreating a brake means after that, and collecting them by a collecting means. SOLUTION: A drive roller 1 is driven by a motor based on a signal of a passing sensor 3 and controls the rotation, stop, and stop position. An impeller 4 is fitted coaxial with a driven roller 2 so as to be deviated axially and has flexible vanes. In forwarding the paper sheet, a guide member 5 guides a paper sheet pressed by the impeller 4. In delivering the paper sheet to a collecting space 6 by a delivery means, the impeller 4 stops at first and a brake impeller 4a stacked on the guide part in the axial view takes charge of the braking operation. To prevent the interference with the delivered paper sheet, an interval between a braking vane 4a and a following braking vane 4b is set larger than the other. This constitution can collect the paper sheets stably.

2. 发明专利

JP2001357643A MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2001357643A
公开(公告)日：2001-12-26
申请号：JP2000184515
申请日：2000-06-14
申请人： HITACHI LTD
发明人： ICHIKAWA RYOICHI , TOKUYAMA MIKIO
IPC分类号： G11B5/60 , G11B21/21 , G11B25/04
摘要： PROBLEM TO BE SOLVED: To provide such a magnetic disk device that temperature rise is suppressed in the IC chip for the magnetic head, with respect to the magnetic disk device where the distance between the IC chip and the head is reduced. SOLUTION: With an eddy generator attached to the upper stream side of the IC chip for the head, in the air flow generating for the IC chip by the revolution of a magnetic disk, disturbance is imparted to the air flow that hits the IC chip, improving heat conduction from the IC chip. In addition, the IC chip for the head is attached to a binding plate that fixes a suspension and a movable arm, so that heat radiation of the IC chip is improved.

3. 发明专利

JPH0316010A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH0316010A
公开(公告)日：1991-01-24
申请号：JP22739189
申请日：1989-09-04
申请人： HITACHI LTD
发明人： SAKAI KAZUO , TERAYAMA TAKAO , ICHIKAWA RYOICHI , MORIKAWA JUICHI
IPC分类号： G11B5/53
摘要： PURPOSE:To reduce the vibration of a tape which is the main cause of noise or video jitter and to improve reliability by providing a very small projection which is merely lower than the height of a head to the outside circumferential surface of a drum and reducing force for deforming the tape when the head is rushed in or separated from the tape in an out-of-plane direction. CONSTITUTION:A notched part 5 which is opened on a fixed drum side is provided to the outside circumference part of the rotating drum 1 and the rotating head 3 is arranged to the inside circumferential surface of the notched part 5. Besides, the projection part 4 is formed on a plane which is on the outside circumference part of the rotating drum 1 and which is almost the same as the rotating plane of the rotating head 3 and the part of the projection part 4 where the head 3 is disposed is notched. A head base 8 is fixed to the rotating drum by setting the same surface where the rotating head is fixed as the rotating drum side and the height (h) of the projection part 4 is set (h)

4. 发明专利

JPH02273312A INFORMATION RECORDING AND REPRODUCING HEAD 失效
公开(公告)号：JPH02273312A
公开(公告)日：1990-11-07
申请号：JP9285489
申请日：1989-04-14
申请人： HITACHI LTD
发明人： SAKAI KAZUO , TERAYAMA TAKAO , ICHIKAWA RYOICHI
IPC分类号： G11B5/53
摘要： PURPOSE:To control the vibration of an information recording medium, and stably fetch an output by providing a rotatable second head which does not record/reproduce information on a front side in the rotating direction of a rotary head. CONSTITUTION:A second head 2 is arranged on electrostrictive elements 5a and 5b ahead of a rotary head 1. When a constant voltage is applied in the width direction of the elements 5a and 5b, the head is expanded/compressed in the longitudinal direction, when a potential on the external side of the elements 5a and 5b is zero and the voltage is applied from a power source 10 to the center part of the elements 5a and 5b, for example, the element 5a is compacted, and the element 5b is expanded to the contrary. Since the elements 5a and 5b are mutually bonded at the center part, the whole element 5 is displaced, and the second head 2 provided at the tip of the element 5 is displaced as shown in a figure. Since the displacement quantity of the element 5 can be controlled by the voltage, the head 2 can be displaced so as to slightly project to the external periphery of a drum 6. When the rotary head rushes or separates with respect to an information recording medium 7, the vibration of the medium 7 can be controlled by displacing the second head 2 and making contact with the medium 7.

5. 发明专利

JPS6258897A DRIVING METHOD FOR STEPPING MOTOR 失效
公开(公告)号：JPS6258897A
公开(公告)日：1987-03-14
申请号：JP19371985
申请日：1985-09-04
申请人： HITACHI LTD
发明人： ICHIKAWA RYOICHI , TERAYAMA TAKAO , SUZUKI NOBUO
IPC分类号： H02P8/32
摘要： PURPOSE:To reduce vibrations on stoppage by holding a magnetic field at the positions of 0.5-1.0 steps once and shifting the magnetic field to a position where a stepping motor is moved by one step after a fixed time passes when the stepping motor is moved by one step. CONSTITUTION:When coils 13, 14 are excited by a low-voltage power supply on the ON of transistors 5, 6 and a rotor stopping at a midpoint between the coils 13, 14 is moved up to a midpoint between coils 14, 15, the coil 14 is excited by a high-voltage power supply 1 by turning the transistor 5 OFF, transistors 6, 7 ON and a transistor 18 ON, and the coil 15 is excited at low voltage 2, thus shifting the position of a magnetic field to a point where nearer to the coil 14 than the midpoint between the coil 14 and the coil 15, then transferring the rotor to the position of the magnetic field. The coil 15 is excited by high voltage after a fixed time passes after the rotor passes through the point, and the position of the magnetic field is brought to the midpoint between the coils 14 and 15, thus reducing vibrations on stoppage.

6. 发明专利

JP2001093249A MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2001093249A
公开(公告)日：2001-04-06
申请号：JP2000264485
申请日：2000-08-29
申请人： HITACHI LTD
发明人： TOKUYAMA MIKIO , ICHIKAWA RYOICHI , OKAMOTO NORIAKI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk device suitably used for high-speed accessing by reducing the size and the weight of a magnetic disk supporting mechanism. SOLUTION: One end of a supporting part 3 is held by a rotatable rigid arm part 4, and a pneumatic pressure adjusting means 7 formed by shaping the supporting part itself is provided in the opposing surface of a magnetic disk 1 near the free end of the supporting part. A magnetic head 2 is attached to a magnetic head attaching part 31 roughly perpendicular to the positive pressure generating part 71 of the pneumatic pressure adjusting means provided in the free end of the supporting part. The positive pressure generating part 71 is composed of a tapered part 711 and a flat part 712, an air spring is formed by its relative motion with a magnetic disk, and the magnetic head is caused to float by a floating amount matching ahead pressing load generated based on the rotational angle θ of the supporting part. By changing the rotational angle θ, an optional floating amount, or a contact surface pressure with the magnetic disk, is obtained.

7. 发明专利

JP2000185860A PAPER SHEET COLLECTING DEVICE 失效
公开(公告)号：JP2000185860A
公开(公告)日：2000-07-04
申请号：JP26504699
申请日：1999-09-20
申请人： HITACHI LTD
发明人： FURUDONO MASUO , KATO RIICHI , ICHIKAWA RYOICHI , SHIBATA SHINJI
IPC分类号： B65H29/22 , B65H29/52
摘要： PROBLEM TO BE SOLVED: To provide a paper sheet collecting device which can collect even those paper sheets of which sizes are different from each other with their rear ends aligned with each other to remarkably increase the performance of a collecting operation by stopping the paper sheets with a resistance caused by a contact between a vane of an impeller and an overlap part of a collecting guide and then moving the paper sheets by the rotation of the impeller. SOLUTION: This device is formed so that an elastic vane for braking 4a or 4b of an impeller 4 is stopped at a rotating phase overlapped with a collecting guide 5, and those paper sheets entered into a collecting space 6 are stopped with a contact resistance force caused at an overlapped position. After the sheets have been stopped, the impeller 4 is rotated by a specified amount so as to release the contact resistance force and move the sheets to a receiving plate 9 side for collecting them.

8. 发明专利

JPH06176456A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH06176456A
公开(公告)日：1994-06-24
申请号：JP32398092
申请日：1992-12-03
申请人： HITACHI LTD
发明人： YAMASHITA TAICHIRO , SAKAI KAZUO , ICHIKAWA RYOICHI , YANAGIHARA NORIHISA
IPC分类号： G11B15/665
摘要： PURPOSE:To prevent the frange of a tape guide from being pressed to the edge surface of a magnetic tape by changing the height and the inclined angle of the tape guide after the magnetic tape starts to wind around an inclined post. CONSTITUTION:The inclined angle of the inclined post 10 and the final winding angle of the magnetic tape 1 are set so that the deviation of the inclined angle and the height at the magnetic tape 1 is not generated when the magnetic tape 1 is spirally wound around a rotary drum 5 at a prescribed angle. Thus, when the winding angle of the magnetic tape 1 around the rotary drum 5 is smaller than the prescribed angle while loading action, the winding angle of the magnetic tape 1 around the inclined post 10 is made smaller, that is, the quantity of changes in the winding angles and the inclined angles of first and third tape puling-out moving bodies 46 and 48 are made in proportion to the winding angle of the magnetic tape 1 around the inclined post 10.

9. 发明专利

JPH02247855A GUIDE DRUM FOR INFORMATION RECORDING AND REPRODUCING 失效
公开(公告)号：JPH02247855A
公开(公告)日：1990-10-03
申请号：JP6619989
申请日：1989-03-20
申请人： HITACHI LTD
发明人： SAKAI KAZUO , TERAYAMA TAKAO , ICHIKAWA RYOICHI , OWADA NOBUYOSHI , MORIKAWA JUICHI
IPC分类号： G11B15/61
摘要： PURPOSE:To guide a medium with high accuracy over the entire circumference on guide drums by providing a driving element which generates the force to move the medium in the direction intersecting with the traveling direction of the medium while maintaining contact with the medium surface in a medium winding part of the drums. CONSTITUTION:A magnetic tape 7 travels in the state of helically winding on the guide drums 1, 2. A driving element 6 disposed to be partly exposed on the tape-sliding surface of the stationary drum 2 is constituted by fixing an electrostrictive element 9 and an elastic body 8. The waveform fluctuations moving in an arrow C direction are generated in the elastic body 8 by impressing a high-frequency voltage from an electrostrictive element driving circuit 34 to the electrostrictive element 9 and shifting the phase of the impressed voltage according to the positions of the electrostrictive element 9. The tape 7 in contact with the elastic body 8 eventually receives the force from the driving element 6 in the direction D intersecting with an arrow direction E when the tape is transported in this direction E on the guide drums 1, 2. The tape is thus guided with the high accuracy along a lead 12.

10. 发明专利

JP2001332068A MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2001332068A
公开(公告)日：2001-11-30
申请号：JP2000154343
申请日：2000-05-22
申请人： HITACHI LTD
发明人： TOKUYAMA MIKIO , ICHIKAWA RYOICHI , NAKAMURA SHIGEO , SHIMIZU TOSHIHIKO , MASUDA HIROMITSU , TOKISUE HIROMITSU
IPC分类号： G11B25/04 , G11B5/012 , G11B5/48 , G11B19/02 , G11B19/04 , G11B33/12 , G11B33/14
摘要： PROBLEM TO BE SOLVED: To control IC temperature at a prescribed temperature or below to secure reliability because IC is heated by consumed power at the time of writing and reading information and may perform an improper operation. SOLUTION: In a magnetic head supporting mechanism provided with an IC for a head, difference of cooling capacity of the IC is quantified by a disk radial position and only the power (signal) which keeps temperature constant is supplied to IC responding to the temperature of the IC. For that reason, the temperature of the IC is maintained at a prescribed temperature or below because the power consumption does not exceed the cooling capacity dependent on the radial position of the IC.

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