公开(公告)号：JPH05334710A

公开(公告)日：1993-12-17

申请号：JP16224692

申请日：1992-05-28

Applicant: SONY CORP

Inventor： TAKANO HIDEKI ,  IWAASA SHIYOUJI ,  KATOU YOSHIMUNE

IPC: G11B7/08 ,  G11B7/125 ,  H01S5/00 ,  H01S3/18

Abstract: PURPOSE:To surely shield a laser light source and to improve the efficiency of assembling work by mounting the laser light source, a penetration capacitor for supplying a drive signal and a wiring board in an optical base opening only two faces from the same direction integrally and thereafter closing the opening faces by a two faces shield plate. CONSTITUTION:After a laser diode 2 and the penetration capacitor 10 for supplying the drive signal are mounted to the wiring board 36, the diode 2 and the capacitor 10 are written and held respectively on a recessed part 24 and the opening 32 provided on the upright wall surface of the optical base 22 formed integrally in a rectangular shape by four wall surfaces and whose two faces are opened. Then, the shield plate 26 with an L shape wall surface opposing to the opening of the base 22 is engaged with the closing surfaces of the base 22 by engaging pieces 26A, 26B. Thus, the assembling work is simplified and the efficiency of the work is improved and the base 22 is shielded surely and undesired radiation is reduced.

公开(公告)号：JPH03171455A

公开(公告)日：1991-07-24

申请号：JP31105689

申请日：1989-11-30

Applicant: SONY CORP

Inventor： ISHIDA MINORU ,  IWAASA SHIYOUJI ,  UOTA YUKIHIKO

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

Abstract: PURPOSE:To reduce the mass of the movable part of an optical pickup device and to speed up the movement of the optical pickup device in a radius direction of a magneto-optical disk by performing the movement operation in the radial direction of the magneto-optical disk in synchronism with the optical pickup device which is moved in the radius direction of the magneto-optical disk. CONSTITUTION:A magnetic field producing means 10 which is supported movably in the radius direction of the magneto-optical disk 3 is set opposite the magneto-optical disk 3 by following-up means 27 and 28 and moved in the radius direction of the magneto-optical disk 3 in synchronism with the optical pickup device 4 which is moved in the radius direction of the magneto-optical disk 3. Therefore, this magnetic field producing means 10 never becomes a load on the movement of an optical pickup 4. Consequently, the movable part of the optical pickup device is reduced in mass and fast seeking becomes possible.

公开(公告)号：JPH01319766A

公开(公告)日：1989-12-26

申请号：JP15380388

申请日：1988-06-22

Applicant: SONY CORP

Inventor： YUASA MASAMI ,  IWAASA SHIYOUJI ,  NAKANO YUICHI

IPC: G03G15/05 ,  B41J2/44 ,  G03G15/00 ,  G03G15/04

Abstract: PURPOSE:To improve resolution and to make a device compact by irradiating a photosensitive layer on the outer periphery with light from a light source from inside a drum and forming an electrophotographic image. CONSTITUTION:The photosensitive layer 11 is formed on the outer periphery of the drum 10 made of transparent glass through a transparent electrode 12. A laser diode 19 and a condenser lens 20 are arranged in a case 18 on a carriage 15 inside the drum 10. The carriage 15 is moved by a feed screw 16, and simultaneously a motor 22 rotates to irradiate the layer 11 with a laser beam 25 through a prism mirror 21. The laser beam 25 passes through the drum 10 and the electrode 12, and focuses on the photosensitive layer 11. As a result, the optical path length of the laser beam 25 becomes constant to narrow down a spot to a smaller size. In addition, the linear velocity of the laser beam 25 can be made constant without using an F-theta lens. Consequently, the resolution is improved, and the device is made compact.

公开(公告)号：JP2001056950A

公开(公告)日：2001-02-27

申请号：JP23230699

申请日：1999-08-19

Applicant: SONY CORP

Inventor： KOBAYASHI KAZUMI ,  IWAASA SHIYOUJI ,  NISHI NORIAKI

IPC: G11B7/12 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To increase the degree of freedom in the arrangement of parts. SOLUTION: The optical pickup is constituted such that a semiconductor laser device and a photodetector for receiving reflected return light from an optical disk are arranged in the same package 24 in a state placed side by side in parallel to the disk face. The optical pickup is further equipped with an integrated optical element 9 in which the outgoing optical axis position 25 of a laser beam emitted from the semiconductor laser device is one-sidedly situated on one side 24a of the package in the parallelly placed direction of the semiconductor laser device and the photodetector.

公开(公告)号：JPH08124200A

公开(公告)日：1996-05-17

申请号：JP28405594

申请日：1994-10-25

Applicant: SONY CORP

Inventor： IWAASA SHIYOUJI

IPC: G11B7/08 ,  G11B7/12 ,  H05K1/00 ,  H05K7/14

Abstract: PURPOSE: To provide an attaching structure of a repeating flexible substrate in an optical pickup reduced in a cost by eliminating the need of parts for fixing and making it easy to attach. CONSTITUTION: The repeating flexible substrate 11 for connecting a circuit substrate incorporating an external drive control circuit to the optical pickup is attached to the slide base 12 of the optical pickup. In the repeating substrate attaching structure 10 of the optical pickup, a reinforcing plate 11g provided in an area opposite to the slide base 12 of the repeating flexible substrate 11 is provided with engaging parts 13, 14 confronted with each other, and the slide base 12 is provided with the engaging parts 15, 16 capable of engaging the engaging parts of the reinforcing plate. At least one set of engaging parts is elastically engaged among the engaging parts of the reinforcing plate 11g and the slide base 12 engaged with each other.

公开(公告)号：JPH05205203A

公开(公告)日：1993-08-13

申请号：JP3447892

申请日：1992-01-24

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI ,  IWAASA SHIYOUJI

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

Abstract: PURPOSE:To reduce the influences of the magnetic field leaking from an electromagnetic actuator upon recording. CONSTITUTION:By changing the direction of a permanent magnet of an electromagnetic actuator and the direction of a current flowing in the electromagnetic actuator, this magneto-optical disk drive is driven in a manner that the direction of a synthesized magnetic field 38 of the leaking magnetic field generated when the disk drive is driven is agreed with that of a recording magnetic field 36 having smaller intensity than a recording magnetic field 37 in the opposite direction to the recording magnetic field 36.

公开(公告)号：JPH0520809A

公开(公告)日：1993-01-29

申请号：JP19885991

申请日：1991-07-12

Applicant: SONY CORP

Inventor： IWAASA SHIYOUJI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B21/02

Abstract: PURPOSE:To surely connect an optical pickup device to a magnetic head device even when the verticality and the positional accuracy of a shaft hole and a shaft pin are not finished with high accuracy at a connecting part of the optical pickup device to the magnetic head device. CONSTITUTION:A connecting part 400 of an optical pickup device 5 to a magnetic head device 6 is formed in such a way that the tip part of a shaft pin 406 on one side is formed to be a taper shape and that it is faced with the opening edge of a shaft hole 404 on the other side so as to produce a gap in the axial direction in the raised position of a frame member 23 for magnetic- head raising and lowering use; the shaft pin 406 is coupled to and can be connected to the shaft hole 404 in the lowered position.

公开(公告)号：JPH0520726A

公开(公告)日：1993-01-29

申请号：JP19885891

申请日：1991-07-12

Applicant: SONY CORP

Inventor： IWAASA SHIYOUJI ,  IKUTSU YOUICHI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B21/12 ,  G11B21/20

Abstract: PURPOSE:To set an accurate position of a magnetic head device by providing a stopper which touches a chassis board and positions the magnetic head device with a prescribed gap secured to the signal recording surface of an optical disk. CONSTITUTION:A magnetic head lifting frame member 23 is provide with a stopper mechanism 84. A stopper pin 87 supported by the member 23 contains integrally a screw axis 88 screwed into a screw hole 85, an axis part 89 screwed into an axis hole 86, and a contact seat part 90 provided at the part 89. When a tool inserting groove 91 is turned by a tool, the axis 88 is moved in the hole 85 and adjusts the move-in/out of the part 90 to the lower surface of the member 23. Thus it is possible to hold a magnetic head 20 at a position distant from the signal recording surface of an optical disk by a prescribed gap in a recording/reproducing state of the optical disk.

公开(公告)号：JPH04219655A

公开(公告)日：1992-08-10

申请号：JP7393191

申请日：1991-03-13

Applicant: SONY CORP

Inventor： FUJITA GORO ,  IWAASA SHIYOUJI ,  TOYODA KIYOSHI ,  KASHIWAGI HIROSHI

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

Abstract: PURPOSE:To accurately control the position of a head even for an magneto- optical disk having an area different in reflectivity. CONSTITUTION:A gap sensor consisting of a light emitting element 5 and light receiving elements 6 and 7 is arrayed along the track direction of the magneto- optical disk. Thus, the received light quantity of the light receiving elements is prevented from generating an unbalance at the boundary part of the areas of the magneto-optical disk different in reflectivity.

公开(公告)号：JPH01319782A

公开(公告)日：1989-12-26

申请号：JP15380488

申请日：1988-06-22

Applicant: SONY CORP

Inventor： IWAASA SHIYOUJI

IPC: G03G21/00

Abstract: PURPOSE:To eliminate nonconformity of earth in the peripheral direction of a conductive layer by mounting a conductive sleeve on the edge part of a drum, and joining and fixing the conductive layer and the sleeve with conductive adhesive. CONSTITUTION:A laser beam printer is provided with the cylindrical drum 10, which is formed of transparent glass of synthetic resin, and a photosensitive layer 11 is formed on the outside surface of the drum 10. A transparent electrode film 12 is formed between the photosensitive layer 11 and the outside surface of the drum 10, and is exposed to the edge part of the outside surface of the drum 10. The conductive sleeve 37 is attached on the part where the film 12 is exposed, and both of them are joined by the conductive adhesive 38. The sleeve 37 is earthed by a roller 39 which supports the sleeve 37. Thus, nonconformity of earth in the peripheral direction of the layer 12 is eliminated.