公开(公告)号：JP2002107601A

公开(公告)日：2002-04-10

申请号：JP2000301114

申请日：2000-09-29

Applicant: SONY CORP

Inventor： AKIMOTO KATSUJI ,  KUMANO AKIRA ,  OSHIMA EIJI

IPC: G02B7/04

Abstract: PROBLEM TO BE SOLVED: To reduce sliding resistance and sliding viscosity resistance while keeping a clearance highly accurately, and to eliminate adverse effect caused by dust, etc., in an engagement relation between a lens moving frame and a guide shaft. SOLUTION: In the lens barrel having two guide shafts 11 and 12, and a focus lens 7 which is supported by the guide shafts 11 and 12 and is driven by a linear motor 18 to be moved in an optical axis direction, the bearing structure 17 of a lens holding frame 10 for holding the focus lens 7 and at least one of the guide shafts is constituted of a 1st contact surface in contact with the guide shafts 11 and 12 or a bearing hole 10c at a prescribed clearance in order to secure the moving accuracy of the focus lens 7 and a 2nd contact surface in contact with the guide shafts 11 and 12 or the bearing hole 10c at a clearance larger than that of the 1st contact surface.

公开(公告)号：JPH11305101A

公开(公告)日：1999-11-05

申请号：JP10651098

申请日：1998-04-16

Applicant: SONY CORP

Inventor： OSHIMA EIJI ,  SHIGEMATSU AKIYOSHI

IPC: G02B7/04

Abstract: PROBLEM TO BE SOLVED: To provide a lens barrel for a camera constituted so that a coupling means and a moving frame can be easily coupled. SOLUTION: This lens barrel is provided with the coupling means 123 and 143 respectively coupling the first and the second moving frames 121 and 141 and respective driving means moving the frames 121 and 141 and having fitting parts 123b and 143b fitted with the frames 121 and 141 by elastic force, respectively.

公开(公告)号：JPH11185246A

公开(公告)日：1999-07-09

申请号：JP35311097

申请日：1997-12-22

Applicant: SONY CORP

Inventor： YOTSUYA MICHIO ,  KAWAZOE KAZUSHIGE ,  OSHIMA EIJI

IPC: G11B5/82 ,  G11B21/21

Abstract: PROBLEM TO BE SOLVED: To perform stable and safe unloading with a simple structure even in the magnetic disk device of a dynamic unloading type, which uses a negative pressure head slider. SOLUTION: Information is recorded/reproduced by magnetic head attached to a negative pressure head slider swung while being floating from a surface by a specified floating amount, and in an unloading area in the vicinity of an outer periphery, which is the unloading area of a discoid storage medium 12 for dynamic loading/unloading of the negative pressure head slider, a groove 12a is formed.

公开(公告)号：JPH1145528A

公开(公告)日：1999-02-16

申请号：JP19901897

申请日：1997-07-24

Applicant: SONY CORP

Inventor： ISHIOKA HIDEAKI ,  OSHIMA EIJI ,  OONUKI YOSHIKAZU

IPC: G11B5/82 ,  G11B5/596 ,  G11B5/84 ,  G11B21/10

Abstract: PROBLEM TO BE SOLVED: To make it possible to secure the accuracy, to make the device constitution small, to prevent the manufacturing cost from increasing, to increase the recording density of the spiral servo information recording. SOLUTION: A rugged pattern for positioning a head to the 1b surface of the magnetic disk medium is formed at the step ST1, and servo information is written onto the 1a surface as a magnetization reversal pattern for the head positioning, at the steps ST3 and ST4, while performing the positioning for write-in onto the 1a surface of the magnetic disk medium based on the rugged pattern read out from the 1b surface.

公开(公告)号：JPH1115042A

公开(公告)日：1999-01-22

申请号：JP16606197

申请日：1997-06-23

Applicant: SONY CORP

Inventor： OSHIMA EIJI ,  NANJO YUSUKE ,  NAKAZATO KUNIO

IPC: G02B7/02 ,  G03B9/02

Abstract: PROBLEM TO BE SOLVED: To reduce the influence of diffraction by a transparent part being very small in an intermediate aperture in the process of reaching a small aperture. SOLUTION: This diaphragm device is provided with two aperture blades 3 and 4 and an ND filter holding member 5 to which a first ND filter 22 is attached. The ND filter holding member 5 is provided to move in the same direction as that of one aperture blade 3 located to hold the other aperture blade 4, in the direction of an optical axis x-x. Then, a second ND filter 23 is attached to one aperture blade 3, to cover a part of the aperture diameter forming notch 14 of the aperture blade 3, so that the area covering an aperture 30 of the first ND filter 22 is made different from that of the second ND filter 23.

公开(公告)号：JPH10289542A

公开(公告)日：1998-10-27

申请号：JP9621197

申请日：1997-04-14

Applicant: SONY CORP

Inventor： YAMAMOTO KAZUYUKI ,  YAMADA TAKASHI ,  MAMIYA TOSHIO ,  TAKAHASHI KAZUO ,  OSHIMA EIJI

IPC: G11B21/02

Abstract: PROBLEM TO BE SOLVED: To allow a head to normally float despite of surface wobbling of a disk. SOLUTION: This actuator has tow suspensions 2a, 2b arranged plane- symmetrically to a disk, a holding part 3 to hold the two suspensions, a driven part 6 driven by a voice coil motor, and a joint part 7 joining the holding part with the driven part in the direction perpendicular to the disk surface in a flexible structure. When the height of the disk shifts for above, the upper suspension is more deformed than the lower suspension, a reaction force given to the upper suspension by the disk is layer than that given to the lower suspension, and an upward force acts on the holding part. Since the joint part has a flexible structure in the vertical direction, the holding part moves up until the force is brought into balance. As a result, a positional relationship between the disk and the upper and lower suspensions approaches to an ideal state.

公开(公告)号：JPH10241276A

公开(公告)日：1998-09-11

申请号：JP4123397

申请日：1997-02-25

Applicant: SONY CORP

Inventor： KAWAZOE KAZUSHIGE ,  OSHIMA EIJI ,  TAKAHASHI KAZUO ,  MAMIYA TOSHIO ,  YOTSUYA MICHIO ,  YAMADA TAKASHI ,  YAMAMOTO KAZUYUKI ,  OUCHI HIRONOBU

IPC: G11B19/20 ,  F16C17/10

Abstract: PROBLEM TO BE SOLVED: To seal a fluid for a bearing in a bearing cylindrical body without using a magnetic fluid. SOLUTION: A shaft 16 is inserted into the cylindrical body 30 of a cylindrical bearing part, and a viscous fluid 32 is sealed in between this shaft and the cylindrical body, so as to form a fluid bearing part 50 in this cylindrical body. A fluid sealing means 60 is provided on the upper end of the fluid bearing part. The sealing means is composed of only mechanical elements such as a groove 62 formed in a circumferential surface of the shaft or in an inner wall of the cylindrical body and a V-shaped projecting part 64 for generating air pressure formed at an upper end of the groove. Since a magnetic fluid is not used, no leakage of such a magnetic fluid itself takes place. Since an annular magnet for attracting this magnetic fluid is not required, a space for this magnet is saved, and hence miniaturization and thin formation are realized.

公开(公告)号：JPH1064224A

公开(公告)日：1998-03-06

申请号：JP22409696

申请日：1996-08-26

Applicant: SONY CORP

Inventor： MAMIYA TOSHIO ,  YAMAMOTO KAZUYUKI ,  YAMADA TAKASHI ,  TAKAHASHI KAZUO ,  OSHIMA EIJI

IPC: G11B23/033 ,  G11B23/03

Abstract: PROBLEM TO BE SOLVED: To eliminate trouble caused by erroneous loading by accommodating rotatable a disk into a case obtained by combining an upper and lower shells and structuring the facility to drive the disk from the external side. SOLUTION: If a disk cartridge 1 is loaded erroneously with the front side reversed, the longer side surface 1c of the disk cartridge 1 is located at the right side of the aperture in the figure, but, before the disk cartridge 1 is fully loaded, the side surface 1c collides with a stopper member 48 and can no longer be loaded anymore. Thereby, since the disc cartridge 1 is not placed in contact with a head 50 of an actuator 49, the head 50 is not broken even by erroneous loading.

公开(公告)号：JPH1064206A

公开(公告)日：1998-03-06

申请号：JP24430296

申请日：1996-08-26

Applicant: SONY CORP

Inventor： MAMIYA TOSHIO ,  YAMADA TAKASHI ,  YAMAMOTO KAZUYUKI ,  TAKAHASHI KAZUO ,  OSHIMA EIJI

IPC: G11B17/04 ,  G11B17/046 ,  G11B21/02

Abstract: PROBLEM TO BE SOLVED: To slim the whole device by constituting the device so that a read/wire head can be moved and inserted from the outside of a disk cartridge loading section into the disk cartridge. SOLUTION: A turning actuator 51 is doglegged. Suspensions 58a and 58b on the end of the actuator, and mounting plates 57a and 57b go in and out at almost right angles with respect to a head inserting slot 7. Thereby, the width of the head inserting slot 7 can be minimized. And the front end of a disk cartridge 1 is provided with an offset arc section 6 to make it possible to effectively use space in a mechanical chassis 17, as compared with prior art quadrangular disk cartridges.

公开(公告)号：JPH1054837A

公开(公告)日：1998-02-24

申请号：JP22927696

申请日：1996-08-12

Applicant: SONY CORP

Inventor： SAKAMOTO SATOSHI ,  ISHII HIROHISA ,  OSHIMA EIJI ,  NISHIDA YASUO ,  MORO SHUJI

IPC: G01P3/487 ,  G01B7/00 ,  G01D5/245 ,  G01R33/09

Abstract: PROBLEM TO BE SOLVED: To provide a magnetoresistance element sensor, which decrases the effect of the leaking magnetic field of a driving magnet and can improve the assembling property of the magnetoresistance element sensor. SOLUTION: This magnetoresistance element sensor 30 is arranged in the equipment having a driving magnet 8 and a measuring magnet 9 used for the detection of a position and the detection of an angle and detects the change in magnetic field of the measuring magnet 9 with the change in magnetoresistance. In this case, the part of the measuring magnet 9 facing the magnetoresistance element sensor 30 is opened, and a leaking-magnetic-field passing means 40 comprising soft magnetic material for passing the leaking magnetic field of the driving magnet 8 is provided.