WO2002091380A1 - Magnetic disk device - Google Patents
Magnetic disk device Download PDFInfo
- Publication number
- WO2002091380A1 WO2002091380A1 PCT/JP2002/004414 JP0204414W WO02091380A1 WO 2002091380 A1 WO2002091380 A1 WO 2002091380A1 JP 0204414 W JP0204414 W JP 0204414W WO 02091380 A1 WO02091380 A1 WO 02091380A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- arm
- magnetic
- magnetic disk
- carriage
- coil
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
Definitions
- the present invention relates to a magnetic disk drive.
- a spindle motor (not shown) for holding and rotating the magnetic disk 2 between the magnetic disk 2 and the disk clamp 3, and recording / reproducing information on / from the magnetic disk 2
- the magnetic head 4a is mounted on a carriage 4 with a magnetic head 4a mounted thereon, the carriage 5 moves the magnetic head 4a via an actuator 5 and a power unit 6.
- the carriage 4 is provided at one end with an arm section 8 having a suspension section 7 for supporting the magnetic head 4a, and is rotatably supported on a chassis 6 by a shaft section 9.
- a coil 10 is provided at the other end of the sandwich.
- the actuator 5 is a voice coil motor (VCM), and a magnetic field is applied to the coil 10 mounted on the other end of the carriage 4 and the coil 10 to move the carriage 4 to the axis of the shaft 9.
- VCM voice coil motor
- It consists of a magnetic circuit that generates a driving force to rotate around the core.
- the magnetic circuit includes a pair of yokes 11 arranged opposite to each other so as to form a predetermined gap in which the other end of the carriage 4 can move inside, and a magnet 12 fixed to one of the opposing surfaces.
- 1 1a is a shaft that forms a gap between the yokes 11 1 and 1 1b is a
- the stoppers are arranged on the outer periphery of the shaft 11a in order to prevent excessive rotation of the shaft.
- a ramp 13 is provided on the side of the magnetic disk 2 on which the tip of the suspension unit 7 moves, and ramps 13 are formed along the circumferential direction of the magnetic disk drive.
- the worst condition at the time of unloading to retreat the suspension unit 7 from the magnetic disk 2 is that the power supplied to the magnetic disk device 1 is suddenly cut off by an accident. In such a case, the back electromotive force of the spindle motor, which continues to rotate due to the inertia,
- the driving force is supplied to the coil 10 and the driving force of the coil 10 is obtained, whereby the carriage 4 rotates and the load tab 7a of the suspension unit 7 reaches the retreat position 13a.
- the magnetic disk device 1 when the magnetic disk device 1 is small, the magnetic disk 2 is small in diameter and lightweight, so the inertia force is small, the rotation of the spindle motor is short, and sufficient back electromotive force cannot be obtained.
- An auxiliary force is needed to make the load tab 7a of the suspension unit 7 climb the ramp 13.
- an L-shaped lock part 14 made of a magnetic material is provided at a corner of the carriage 4 on the side of the magnetic disk 2 and in the vicinity of the stopper lib.
- Magnets 15 and 16 covered with rubber or resin are arranged to face each side surface of the L-shaped lock part 14. This allows the power
- the suction force of the magnet 15 sucking the lock part 14 is added to the driving force generated in the coil 10, and the load tab 7 a reliably passes over the ramp 13.
- the suspension 7 (therefore, the magnetic head 4a) is prevented from moving onto the magnetic disk 2 by an external impact.
- the magnet 16 sucks the lock part 14 and locks the carriage 4.
- the present invention provides a carriage having a magnetic head mounted at one end and an arm at one end and a coil at the other end rotatably supported on a chassis.
- the other end of the carriage having the coil is arranged in a magnetic circuit in which a magnet is fixed to the opposing surface of the opposing yoke while maintaining a predetermined gap, and the carriage is driven by the driving force generated in the coil to center the axis.
- a magnetic disk drive for rotating the arm around the magnetic disk and moving the distal end of the arm having the magnetic head over a magnetic disk and a standby position on a ramp disposed near the magnetic disk;
- the front end of the arm is arranged on the ramp, and the protrusion at the base end of the arm is positioned with respect to the magnet of the magnetic circuit.
- the protrusion is sucked by a magnet to maintain the rotation of the carriage in a fixed direction and bias the tip of the arm toward the standby position. It is characterized by.
- the projection can be formed of a magnetic material and attached to the base end of an arm made of a non-magnetic material.
- the arm made of a non-magnetic material for moving on the magnetic disk on which the magnetic signal is recorded can have a function of maintaining the rotation of the carriage in a fixed direction.
- the arm and the projection may be integrally formed of a non-magnetic material, and the projection may be magnetized during the molding process.
- the projection when a metal is bent or cut, its composition changes and it takes advantage of its natural magnetism. According to this, it is possible to provide the projection with a function of maintaining the rotation of the carriage in a fixed direction, without configuring the arm and the projection as separate parts.
- FIG. 1 is a perspective view of a magnetic disk drive according to an embodiment of the present invention. Yes,
- FIG. 2 is an enlarged view of an arm mounted with a magnetic head in the magnetic disk drive of FIG.
- FIG. 3 shows the unloaded state and the non-operated state of the arm of the magnetic disk drive of FIG.
- FIG. 4 is a perspective view of a conventional magnetic disk drive.
- FIG. 5 shows the state of the carriage and the actuator of the magnetic disk drive of FIG. 4 during unloading.
- FIG. 6 shows the state of the magnetic disk drive in FIG.
- a spindle motor (not shown) for holding and rotating a magnetic disk 2 between a disk clamp 3 and recording / reproducing information on / from a magnetic disk 2
- a carriage 4 equipped with a magnetic head 4 a and an actuator 5 for moving the magnetic head 4 a via the carriage 4 are provided on a chassis 6.
- the carriage 4 is provided at one end with a arm 8 having a suspension 7 for supporting the magnetic head 4 a, and is rotatably supported by a shaft 9 on a chassis 6.
- the coil 5 is a voice coil motor (VCM) at the other end sandwiching the coil 10.
- the coil 10 is provided at the other end of the carriage 4, and the coil 10 (.:
- the magnetic circuit generates a driving force for rotating the carriage 4 around the axis of the shaft portion 9 by applying a magnetic field.
- This magnetic circuit is composed of a pair of yokes 11 opposed to each other so as to form a predetermined gap in which the other end of the carriage 4 can move inside, and a magnet 12 fixed to one of the opposed surfaces. Is formed. 11a is a shaft that forms a gap between the yokes 11 and 11b is a stopper that is disposed around the shaft 11a to prevent excessive rotation of the carriage 4. , There is one pair each.
- ramps 13 are provided along the circumferential direction of the upward and downward gradients.
- the load tab 7a at the tip of the suspension section 7 moves to the retreat position 13a over the top of the ramp 13 and moves the suspension section 7 (therefore, the magnetic head 4a) to the magnetic field. Evacuate from disk 2.
- the protrusion 17 is made of a magnetic material. As shown in FIG. 2, the protrusion 17 is formed at the base edge of the arm 8 made of non-magnetic material (the edge opposite to the suspension 7), and in the radial direction of the shaft hole 8a. It is installed to extend outward along.
- the suspension part 7 and the arm part 8 are collectively referred to as an arm.
- the magnet 12 corresponds to the movement area of the coil 10 on the carriage 4 rotating around the axis of the shaft 9.
- One end and the other end along the direction of movement of the carriage 4 are an N-pole and an S-pole, respectively, and the boundary between the two poles indicated by oblique lines is the highest magnetic flux between the yokes 11.
- the part is 1 2a.
- the load tab 7a of the suspension part 7 has climbed up the slope of the ramp 13 and the protruding part 17 at the base end of the arm part 8 that opposes it has the high magnetic flux part 12 of the magnet 12.
- a projection 17 is formed so as to face a.
- the above two functions can be used to assist the power to move the load tab 7 a to the ramp 13 when the door is closed. And locking of the carriage 4 during non-operation.
- the projection 17 is formed of a magnetic material (for example, SUS400 series) and attached to the arm 8 made of a non-magnetic material.
- a magnetic material for example, SUS400 series
- the structure will change during processing and it will have some magnetism.
- the portion 17 may be integrally formed using a non-magnetic material.
- the projection 17 which has been magnetized by processing can be attracted to the high magnetic flux portion 12a where the magnetic flux of the gap between the yokes 11 is highest.
- the present invention it is possible to assist the driving force at the time of unloading and lock the carriage 4 at the time of non-operation of the device with a simple configuration in which the projection 17 is provided at the base end of the arm 8. As a result, it is possible to realize an opening mechanism corresponding to a small device without requiring a special installation space and without increasing the number of parts.
Landscapes
- Moving Of Heads (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2002-7017695A KR100534981B1 (ko) | 2001-05-07 | 2002-05-02 | 자기디스크장치 |
US10/332,145 US6914753B2 (en) | 2001-05-07 | 2002-05-02 | Magnetic disk device rotary actuator with magnetic locking |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-135654 | 2001-05-07 | ||
JP2001135654A JP4666803B2 (ja) | 2001-05-07 | 2001-05-07 | 磁気ディスク装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002091380A1 true WO2002091380A1 (en) | 2002-11-14 |
Family
ID=18983075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/004414 WO2002091380A1 (en) | 2001-05-07 | 2002-05-02 | Magnetic disk device |
Country Status (6)
Country | Link |
---|---|
US (1) | US6914753B2 (ja) |
JP (1) | JP4666803B2 (ja) |
KR (1) | KR100534981B1 (ja) |
CN (1) | CN1212618C (ja) |
TW (1) | TWI222626B (ja) |
WO (1) | WO2002091380A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005276368A (ja) * | 2004-03-25 | 2005-10-06 | Toshiba Corp | ランプユニットおよび磁気ディスク装置 |
JP4287318B2 (ja) * | 2004-04-05 | 2009-07-01 | 株式会社東芝 | ディスク装置 |
JP4907290B2 (ja) * | 2005-10-12 | 2012-03-28 | 三星電子株式会社 | ハードディスクドライブのアクチュエータおよびハードディスクドライブ |
KR20090080826A (ko) * | 2008-01-22 | 2009-07-27 | 삼성전자주식회사 | 하드디스크 드라이브 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05166316A (ja) * | 1991-12-16 | 1993-07-02 | Nec Ibaraki Ltd | 磁気ディスク装置の磁気ヘッド固定機構 |
JPH06236645A (ja) * | 1993-02-10 | 1994-08-23 | Hitachi Metals Ltd | ボイスコイルモータのロック機構 |
JP2001210039A (ja) * | 2000-01-27 | 2001-08-03 | Hitachi Ltd | 磁気ディスク装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5541792A (en) * | 1992-03-18 | 1996-07-30 | Hitachi, Ltd. | Actuator arm with magnetic flux response to bias arm to a stop position |
JP3029356B2 (ja) * | 1993-03-01 | 2000-04-04 | 株式会社東芝 | ディスク装置 |
JPH08249846A (ja) * | 1995-03-13 | 1996-09-27 | Fujitsu Ltd | ディスク装置のロータリー型アクチュエータ |
TW286396B (en) * | 1995-06-07 | 1996-09-21 | Ibm | Dual latch apparatus for restraining a direct access storage drive actuator |
US6028744A (en) * | 1997-06-16 | 2000-02-22 | Quantum Corporation | Method and apparatus for latching an actuator assembly to prevent damage to disk drive heads |
JP3229252B2 (ja) * | 1997-09-26 | 2001-11-19 | インターナショナル・ビジネス・マシーンズ・コーポレーション | 回転式アクチュエータを誘導してロックする装置 |
KR100362566B1 (ko) * | 1998-09-22 | 2003-03-19 | 삼성전자 주식회사 | 하드디스크드라이브장치 |
US6487052B1 (en) * | 1999-10-12 | 2002-11-26 | Seagate Technology Llc | Non-contact magnetic latch for disc drive actuator |
KR20040029962A (ko) * | 2000-12-20 | 2004-04-08 | 시게이트 테크놀로지 엘엘씨 | 셀프-포지셔닝 자기 잠금장치 |
-
2001
- 2001-05-07 JP JP2001135654A patent/JP4666803B2/ja not_active Expired - Fee Related
-
2002
- 2002-05-02 KR KR10-2002-7017695A patent/KR100534981B1/ko not_active IP Right Cessation
- 2002-05-02 US US10/332,145 patent/US6914753B2/en not_active Expired - Fee Related
- 2002-05-02 WO PCT/JP2002/004414 patent/WO2002091380A1/ja active IP Right Grant
- 2002-05-02 CN CNB028015185A patent/CN1212618C/zh not_active Expired - Fee Related
- 2002-05-06 TW TW091109351A patent/TWI222626B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05166316A (ja) * | 1991-12-16 | 1993-07-02 | Nec Ibaraki Ltd | 磁気ディスク装置の磁気ヘッド固定機構 |
JPH06236645A (ja) * | 1993-02-10 | 1994-08-23 | Hitachi Metals Ltd | ボイスコイルモータのロック機構 |
JP2001210039A (ja) * | 2000-01-27 | 2001-08-03 | Hitachi Ltd | 磁気ディスク装置 |
Also Published As
Publication number | Publication date |
---|---|
CN1212618C (zh) | 2005-07-27 |
JP2002334530A (ja) | 2002-11-22 |
US20030103295A1 (en) | 2003-06-05 |
KR20030022158A (ko) | 2003-03-15 |
CN1462448A (zh) | 2003-12-17 |
JP4666803B2 (ja) | 2011-04-06 |
KR100534981B1 (ko) | 2005-12-08 |
US6914753B2 (en) | 2005-07-05 |
TWI222626B (en) | 2004-10-21 |
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