公开(公告)号：JP2002352538A

公开(公告)日：2002-12-06

申请号：JP2001124701

申请日：2001-04-23

Applicant: SONY CORP

Inventor： YAMAMOTO KAZUYUKI ,  MAMIYA TOSHIO ,  YAMADA TAKASHI ,  WATANABE MINORU

IPC: G11B21/02 ,  G11B21/12

Abstract: PROBLEM TO BE SOLVED: To increase driving torque in an initial range during loading while a bent type head actuator and a VCM are miniaturized. SOLUTION: In order to miniaturized a bent type head actuator 13 and a VCM 18, and increase driving torque in an initial range during the loading of bent type head actuator 13 by the VCM 18, a projected part 82d is formed in one end of the outer periphery of a magnet 82, and an outer corner part continuous from the radial direction part of a magnet 82 is overlapped on the projected part of the magnet in the bent type head actuator.

公开(公告)号：JP2002352533A

公开(公告)日：2002-12-06

申请号：JP2001221974

申请日：2001-07-23

Applicant: SONY CORP

Inventor： YAMAMOTO KAZUYUKI ,  MAMIYA TOSHIO ,  YAMADA TAKASHI ,  WATANABE MINORU

IPC: G11B21/02

Abstract: PROBLEM TO BE SOLVED: To increase driving torque in an initial range during loading while a bent type head actuator and a VCM are miniaturized. SOLUTION: A projected part 82d projected to the outside or the like of a radial direction is formed in the end side of an unloading direction on the outer periphery of a magnet 82, and an outer R part continuous from the radial direction part of a coil 81 is overlapped on the projected part of the magnet, so that during the loading/unloading of the bent type head actuator 13 on the disk by a VCM 18, the bent type head actuator 13 easily goes over a dynamic loading/unloading lamp while the bent type head actuator 13 and the VCM 18 are miniaturized.

公开(公告)号：JP2002352528A

公开(公告)日：2002-12-06

申请号：JP2001221973

申请日：2001-07-23

Applicant: SONY CORP

Inventor： YAMAMOTO KAZUYUKI ,  MAMIYA TOSHIO ,  YAMADA TAKASHI ,  WATANABE MINORU

IPC: G11B5/60 ,  G11B21/02 ,  G11B21/21

Abstract: PROBLEM TO BE SOLVED: To arrange a wiring member in a float head slider so that the wire has the shortest length. SOLUTION: The wiring of a flexible printed circuit board 95 in the head slider 16 of a bent type actuator 13 is drawn through the inside of the bent part 13a of the bent type head actuator 13 to the outside of a head arm 14.

公开(公告)号：JPH11317034A

公开(公告)日：1999-11-16

申请号：JP8454298

申请日：1998-03-30

Applicant: SONY CORP

Inventor： WATANABE MINORU

IPC: G11B21/10

Abstract: PROBLEM TO BE SOLVED: To provide a positioning device of a magnetic head, which is capable of performing the accurate high speed tracking control, the track jump control, etc., and to provide also a magnetic disk device of high density recording. SOLUTION: A turning type actuator 1 is constituted of an actuator 1a for coarse motion and an actuator 1b for fine motion. The actuator 1b for fine motion is fixed to an arm 13 of the actuator 1a for coarse motion by a hinge spring 19 which is a leaf spring-stated member. The actuator 1b for fine motion is moved to the direction shown by the arrow L in parallel by the force due to the mutual electromagnetic operation between a magnet 14 and a 2nd coil 16. The magnetic head mounted on a slider 18 is roughly positioned around the desired track on the disk at high speed by the actuator 1a for coarse motion, and the accurate positioning and tracking of the magnetic head against the track are performed by the actuator 1b for fine motion.

公开(公告)号：JPH09237479A

公开(公告)日：1997-09-09

申请号：JP4338296

申请日：1996-02-29

Applicant: SONY CORP

Inventor： YAMADA TAKASHI ,  YAMAMOTO KAZUYUKI ,  WATANABE MINORU ,  TAKAHASHI KAZUO

IPC: G11B23/03

Abstract: PROBLEM TO BE SOLVED: To enable the setting of stroke of a slide shutter for opening/closing a head inserting port to be long by parting an elastic body pressing the slide shutter and a disk-like recording medium by a partition member so as not to be positioned on the same plane. SOLUTION: The elastic twist coil spring 58 for pressing the slide shutter 57 is housed in an elastic body housing part where is a spatial part surrounded with the partition member 64 and an upper shell 52, and the slide shutter 57 is always pressed in the direction to close the head inserting port 56 by this spring force. By increasing the size of the twist coil spring 58, the head inserting port 56 is set to the size required for the use of a turnable actuator. Further, the interference between the coil spring 58 and the disk member 70 is prevented in such a manner that the disk housing part 54 is partitioned by the partition member 64 and the height of the twist coil spring 58 is made different from that of the disk member 70.

公开(公告)号：JPH08287651A

公开(公告)日：1996-11-01

申请号：JP9260095

申请日：1995-04-18

Applicant: SONY CORP

Inventor： WATANABE MINORU ,  YAMADA TAKASHI ,  YAMAMOTO KAZUYUKI

IPC: G11B17/03 ,  G11B25/04 ,  G11B33/12

Abstract: PURPOSE: To prevent the contact between a center core and a main body of cartridge, even though the vibration or impact is exerted when the center core of a disk is being fixed to a spindle motor. CONSTITUTION: When the center core 33 of the disk 32 is being fixed to a magnet 14 of the spindle motor 13, the gap D3 between the lower surface of the center core 33 and the inner surface of the main body 31 of cartridge is set so as to be larger than the gap D1 between the upper surface of the center core 33 and the inner surface of a top cover 12. So, when the vibration or impact is exerted and the cartridge main body 31 is thereby moved upward, the upper surface of the cartridge main body 31 is abuts on the top cover 12 and stops, before the cartridge main body 31 is brought into contact with the center core 33. Thus, such a state that the center core 33 and the disk 32 are brought into contact with the cartidge main body 31, can be avoided.

公开(公告)号：JPH08249845A

公开(公告)日：1996-09-27

申请号：JP8171895

申请日：1995-03-14

Applicant: SONY CORP

Inventor： WATANABE MINORU ,  YAMAMOTO KAZUYUKI

IPC: G11B21/12

Abstract: PURPOSE: To prevent damage in a magnetic head and a disk and destruction in the recording information of the disk by engaging or moving an actuator turning the magnetic head of its tip to a stoppage position depending on the detection result of a loading state of a cartridge. CONSTITUTION: When a detection mechanism 34 or 37 detects the insertion or the taking-out of the cartridge 22, a controller 30 releases a lock means 35, or operates a retreat means 31. Thus, the turning actuator 25 is moved to a loading position or a retreat position, and when recording/reproducing state or an ejection button 32 is operated, the actuator 25 is locked to the stoppage position. Simultaneously, an ejection mechanism 33 ejects the cartridge 22 from a main body by signals of the mechanisms 34, 37, and the device returns to an initial state. Thus, the erroneous loading of the actuator 25, the erroneous taking-out of the cartridge, the damage in a tip head slider and the magnetic head, and the destruction in the recording information of the magnetic disk are prevented.

公开(公告)号：JPH08129840A

公开(公告)日：1996-05-21

申请号：JP26781194

申请日：1994-10-31

Applicant: SONY CORP

Inventor： WATANABE MINORU ,  YAMAMOTO KAZUYUKI

IPC: G11B21/02 ,  G11B21/12 ,  G11B21/22

Abstract: PURPOSE: To enlarge a recording range of a disk and to surely prevent runaway of a turning actuator. CONSTITUTION: A rotary lever 30 is arranged under the turning actuator 14 turnably by a rotary shaft 31. The dimple 20 of the turning actuator 14 gets on a ramp 25 at a standby time. Then, when the magnetic disk 13 is rotated, the turning actuator 14 is get off the ramp 25 to be moved onto the magnetic disk 13. Thereafter, the rotary lever 30 is rotated clockwise, and the tip of the ramp 25 is moved outside of the magnetic disk 13. Thus, the recording range of the magnetic disk 13 is enlarged. Further, at this time, an OD stopper 23 on the upper end part of the rotary lever 30 is moved to the magnetic disk 13 side, and it controls the rotation of the turning actuator 14 clockwise. Thus, the runaway of the turning actuator 14 is prevented surely.

公开(公告)号：JPS62178395A

公开(公告)日：1987-08-05

申请号：JP2048286

申请日：1986-02-01

Applicant: SONY CORP

Inventor： KAKINUMA KOICHIRO ,  WATANABE MINORU

IPC: B42D9/04

公开(公告)号：JPS6235891A

公开(公告)日：1987-02-16

申请号：JP17549385

申请日：1985-08-09

Applicant: SONY CORP

Inventor： KAKINUMA KOICHIRO ,  WATANABE MINORU

IPC: B42D9/04 ,  G03B27/62 ,  G03G15/00