公开(公告)号：DE3781252D1

公开(公告)日：1992-09-24

申请号：DE3781252

申请日：1987-12-10

Applicant: SONY CORP

Inventor： EGUCHI NAOYA ,  KAWAKUBO OSAMU ,  OKADA HITOSHI ,  MAEDA TAMOTSU ,  TOSAKA SUSUMU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G02F1/00

Abstract: Magnet rotation control apparatus includes a first coil (12) for rotating a permanent magnet (11) so as to invert the polarity of its magnetic field applied to an optical recording disc (10), and a second coil (13) provided at a position displaced from the central axis of the first coil (12) and for applying a driving force to the permanent magnet (11) when the magnet begins to rotate. The permanent magnet (11) can settle in a relatively short time after being inverted, by controlling a drive current applied to the second coil (13).

公开(公告)号：DE69020756T2

公开(公告)日：1995-12-07

申请号：DE69020756

申请日：1990-03-02

Applicant: SONY CORP

Inventor： SHINKAI HIROYUKI ,  WACHI SHIGEAKI ,  TOSAKA SUSUMU ,  OKAWA SUMIHIRO

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B19/04 ,  G11B27/36

Abstract: The present invention relates to an optical recording and reproducing apparatus comprising an erroneous recording prevention means which prevents this apparatus from making an erroneous recording or erasing operation while it records data on a writable disk (1). The apparatus is arranged such that, while it is performing a recording or erasing operation, a state of its beam of light just about to go off the control point of tracking and a state of its beam of light just about to go off the control point of focusing are each monitored and, when either of the states is detected, the recording or erasing operation is canceled. Hence, laser power of the beam of light can be controlled before the beam of light completely goes off the control point of tracking, thereby preventing the beam of light from affecting data having been recorded along other tracks.

公开(公告)号：EP0222916A4

公开(公告)日：1989-06-13

申请号：EP86902518

申请日：1986-04-28

Applicant: SONY CORP

Inventor： NAITO TAKASHI ,  TOSAKA SUSUMU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

CPC classification number: G11B11/1056

Abstract: A permanent magnet (15) is used as a means for producing an external magnetic field, and a coil (25) is provided so as to surround this permanent magnet (15). This permanent magnet (15) can be turned 180o in a desired direction by a turning force applied thereto and generated by a repellent force due to an external magnetic field Hm produced by the permanent magnet (15) and a magnetic field Hc produced when an electric current is made to flow through the coil (25). This will make it possible to obtain an external magnetic field reversing apparatus of a low cost, a high reliability and small dimensions.

公开(公告)号：SG65754A1

公开(公告)日：1999-06-22

申请号：SG1998000957

申请日：1998-05-05

Applicant: SONY CORP

Inventor： TOBITA MINORU ,  TOSAKA SUSUMU ,  NIWA YOSHIKATSU ,  NAKAO SHINICHI ,  FUJITA GORO

IPC: G11B7/00 ,  G11B11/00 ,  G11B11/10 ,  G11B20/00 ,  G11B20/10

公开(公告)号：DE3687694D1

公开(公告)日：1993-03-18

申请号：DE3687694

申请日：1986-04-28

Applicant: SONY CORP

Inventor： NAITO TAKASHI ,  TOSAKA SUSUMU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

公开(公告)号：AT79687T

公开(公告)日：1992-09-15

申请号：AT87310884

申请日：1987-12-10

Applicant: SONY CORP

Inventor： EGUCHI NAOYA ,  KAWAKUBO OSAMU ,  OKADA HITOSHI ,  MAEDA TAMOTSU ,  TOSAKA SUSUMU

IPC: G02F1/00 ,  G11B11/10 ,  G11B13/04

公开(公告)号：EP1484134A4

公开(公告)日：2007-11-28

申请号：EP03705182

申请日：2003-02-14

Applicant: SONY CORP ,  YAMAGUCHI JINICHI

Inventor： KATO KEISUKE ,  KOIKE GOUSHI ,  TOSAKA SUSUMU ,  MORIKAWA HIROAKI ,  YAMAGUCHI JINICHI ,  NAGASAKA KENICHIRO ,  NAGANO MASAKUNI

IPC: B25J19/00 ,  B62D57/02 ,  B62D57/032

CPC classification number: B25J19/0091 ,  B62D57/02 ,  B62D57/032

Abstract: In a foot of a legged mobile robot, deformation of the foot is absorbed by a first concavity and the position and shape of a ground-contact portion hardly change. Accordingly, variation in a resistive force against the moment about the yaw axis can be reduced and a spinning motion can be prevented. In addition, when the foot is placed on a bump or a step, a flexible portion deforms and receives it, and a frictional retaining force is generated between the flexible portion and the bump. Thus, the foot is flexibly adapted to the road surface, and sliding caused by the bump and excessively fast motion are prevented. Accordingly, the foot can be adapted to various kinds of road surfaces such as surfaces having bumps and depressions, and the attitude stability can be increased.

公开(公告)号：DE69726695D1

公开(公告)日：2004-01-22

申请号：DE69726695

申请日：1997-10-01

Applicant: SONY CORP

Inventor： HORIMAI HIDEYOSHI ,  TOBITA MINORU ,  FUJITA GORO ,  TOSAKA SUSUMU

IPC: G11B7/0037 ,  G11B7/007 ,  G11B7/09 ,  G11B7/135 ,  G11B7/14 ,  G11B7/26 ,  G11B11/105 ,  G11B7/00

Abstract: A format of a recording medium suitable for a larger capacity, a higher transfer rate, and integration of pits/lands/grooves is provided. In a first method, in a recordable and reproduceable area, a twin-track structure of lands/grooves is configured such that tracks on which lands become recording tracks and tracks on which grooves become recording tracks form a double spiral. In a read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in a data area. In a second method, in a recordable and reproduceable area, a land/groove-alternate track structure is configured such that grooves become data recording tracks in the circular track next to the circular track in which lands become data recording tracks, and lands become data recording tracks in the next circular track. In the read-only area, pits are arrayed such that tracks in the radial direction of the disk are formed in the data area.

公开(公告)号：DE3650686T2

公开(公告)日：1998-10-22

申请号：DE3650686

申请日：1986-04-28

Applicant: SONY CORP

Inventor： NAITO TAKASHI ,  TOSAKA SUSUMU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: The present invention relates to an external magnetic field inverting apparatus for a magneto-optical disc apparatus in which a permanent magnet (15) is used as external magnetic field generating means and a winding (25) is located so that upon supply of a current to that winding the said permanent magnet (15) can be rotated. A magnetic member (30) is located near the said permanent magnet (15) in such a manner that a magnetic flux generated from said winding (25) crosses that permanent magnet (15) with an inclination of a pretermined angle relative to an axis perpendicular to the longitudinal axis of the permanent magnet (15). Thereby the apparatus according to the invention can be reduced in cost, increased in reliability and miniaturized in size.

公开(公告)号：DE3650686D1

公开(公告)日：1998-07-23

申请号：DE3650686

申请日：1986-04-28

Applicant: SONY CORP

Inventor： NAITO TAKASHI ,  TOSAKA SUSUMU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: The present invention relates to an external magnetic field inverting apparatus for a magneto-optical disc apparatus in which a permanent magnet (15) is used as external magnetic field generating means and a winding (25) is located so that upon supply of a current to that winding the said permanent magnet (15) can be rotated. A magnetic member (30) is located near the said permanent magnet (15) in such a manner that a magnetic flux generated from said winding (25) crosses that permanent magnet (15) with an inclination of a pretermined angle relative to an axis perpendicular to the longitudinal axis of the permanent magnet (15). Thereby the apparatus according to the invention can be reduced in cost, increased in reliability and miniaturized in size.