CA2017100A1 - Magnetic latch for disk drive actuator - Google Patents

Magnetic latch for disk drive actuator

Info

Publication number
CA2017100A1
CA2017100A1 CA2017100A CA2017100A CA2017100A1 CA 2017100 A1 CA2017100 A1 CA 2017100A1 CA 2017100 A CA2017100 A CA 2017100A CA 2017100 A CA2017100 A CA 2017100A CA 2017100 A1 CA2017100 A1 CA 2017100A1
Authority
CA
Canada
Prior art keywords
latch
carriage
actuator
gap
pole pieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2017100A
Other languages
French (fr)
Other versions
CA2017100C (en
Inventor
Gary Kelsic
Jim Martinez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxtor Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2017100A1 publication Critical patent/CA2017100A1/en
Application granted granted Critical
Publication of CA2017100C publication Critical patent/CA2017100C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • 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

Abstract

A limit stop/latching assembly in a disk storage system includes a crash stop for limiting travel of the actuator carriage at a fixed stop position. The assembly has a carriage latch incorporated with the crash stop. A
magnetic latch actuator plate extends from the actuator carriage and is movable with the actuator carriage in a path of travel of the actuator carriage to abut the stop position. The carriage latch has a magnet and a pair of magnetic pole pieces abutting the magnet wherein the distance between the pole pieces defines a fist gap and the distance between the pole pieces and the latch actuator plate defines a second gap. The latch is moved between a latched position, wherein said pole pieces are in magnetic contact with the latch plate, and a free position, wherein the actuator carriage is pivoted such that the second gap is greater than the first gap whereby magnetic flux is channeled substantially through the first gap to enable the latch plate to move remote from the crash stop.
WSF24.1
CA002017100A 1989-05-22 1990-05-18 Magnetic latch for disk drive actuator Expired - Fee Related CA2017100C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US355,162 1989-05-22
US07/355,162 US5023736A (en) 1989-05-22 1989-05-22 Magnetic latch for disk drive actuator

Publications (2)

Publication Number Publication Date
CA2017100A1 true CA2017100A1 (en) 1990-11-22
CA2017100C CA2017100C (en) 1995-12-19

Family

ID=23396454

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002017100A Expired - Fee Related CA2017100C (en) 1989-05-22 1990-05-18 Magnetic latch for disk drive actuator

Country Status (6)

Country Link
US (1) US5023736A (en)
EP (1) EP0473719B1 (en)
JP (1) JPH05504646A (en)
CA (1) CA2017100C (en)
DE (1) DE69025609T2 (en)
WO (1) WO1990014659A1 (en)

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US5956213A (en) 1988-01-25 1999-09-21 Seagate Technology, Inc. Latch mechanism for disk drive using magnetic field of actuator magnets
EP0484433B1 (en) * 1989-07-31 1998-09-16 Seagate Technology, Inc. Architecture for 2-1/2 inch diameter single disk drive
US5329412A (en) * 1990-06-01 1994-07-12 Conner Peripherals, Inc. Two and one half inch diameter disk drive having 0.6 inch height
JPH06502951A (en) * 1990-06-01 1994-03-31 コナー　ペリフェラルズ　インコーポレイテッド Multi-disk drive with a diameter of 6.35 cm (2.5 inches)
JPH04305879A (en) * 1990-09-12 1992-10-28 Fuji Electric Co Ltd Device for binding moving body to operate head of disk storage device
US5296986A (en) * 1990-12-19 1994-03-22 Integral Peripherals, Inc. Rotary intertial latch for disk drive actuator to protect against rotational shock force
US5189576A (en) * 1990-12-19 1993-02-23 Integral Peripherals, Inc. Rotary inertial latch for disk drive actuator
US5404257A (en) * 1990-12-19 1995-04-04 Integral Peripherals, Inc. Rotary inertial latch for disk drive actuator
WO1992011628A1 (en) * 1990-12-19 1992-07-09 Integral Peripherals, Inc. Miniature hard disk drive for portable computer
US5267110A (en) * 1991-03-19 1993-11-30 International Business Machines Corporation Rotary actuator for a direct access storage device
JP2596300Y2 (en) * 1991-05-30 1999-06-07 ティアック株式会社 Hard disk drive head arm mechanism
JP2772174B2 (en) * 1991-09-06 1998-07-02 茨城日本電気株式会社 Magnetic head fixing mechanism for magnetic disk drive
US6310747B1 (en) 1991-09-25 2001-10-30 Mobile Storage Technology, Inc. Method for reducing external signal interference with signals in a computer disk storage system
US5379171A (en) * 1991-09-25 1995-01-03 Integral Peripherals Microminiature hard disk drive
WO1993010535A1 (en) * 1991-11-22 1993-05-27 Fujitsu Limited Disc device
US5270887A (en) * 1991-12-04 1993-12-14 Western Digital Corporation Compact disk drive head disk assembly with conformable tape seal
US5477403A (en) * 1992-01-24 1995-12-19 Hewlett-Packard Company Disk drive having a crash stop detent actuator latch
US5303101A (en) * 1992-03-10 1994-04-12 Nec Corporation Active magnetic latch for disk drive and method
WO1993019460A1 (en) * 1992-03-16 1993-09-30 Digital Equipment Corporation Carriage retention device for disk drives
US5541792A (en) * 1992-03-18 1996-07-30 Hitachi, Ltd. Actuator arm with magnetic flux response to bias arm to a stop position
US5581424A (en) * 1992-09-21 1996-12-03 Seagate Technology, Inc. Magnetic crash stop and latch in a disc drive
EP0704090B1 (en) * 1992-10-14 1998-12-23 Maxtor Corporation Passive non-contact magnetic latch
US5341259A (en) * 1992-10-22 1994-08-23 Quantum Corporation Pivoting, dual state magnetic latch for disk file actuator
US5608592A (en) * 1992-10-29 1997-03-04 Fujitsu Limited Head actuator
US5361182A (en) * 1992-11-12 1994-11-01 Seagate Technology, Inc. Magnetic carriage latch for a disc drive
US5369538A (en) * 1992-11-12 1994-11-29 Mitsumi Electric Co., Ltd. Rotary disk drive actuator
JP2809953B2 (en) * 1992-12-28 1998-10-15 株式会社東芝 Disk unit
JP3029356B2 (en) * 1993-03-01 2000-04-04 株式会社東芝 Disk unit
US5414577A (en) * 1993-04-23 1995-05-09 Micropolis Corporation Magnetically coupled hard disk drive head positioner latch
US5343346A (en) * 1993-05-06 1994-08-30 Xolox Corporation Single point magnetic contact hatch assembly
US5485323A (en) * 1993-07-14 1996-01-16 International Business Machines Corporation Method and apparatus for moving a disk drive actuator away from a magnetic latch
EP0725966B1 (en) * 1993-08-19 1999-12-08 Seagate Technology, Inc. Magnetic parking device for disk drive
US5455726A (en) * 1993-10-07 1995-10-03 Micropolis Corporation Versatile head positioner stop
JPH07176152A (en) * 1993-12-17 1995-07-14 Fujitsu Ltd Magnetic disk device
KR0119885B1 (en) * 1994-06-20 1997-10-27 김광호 Latch system of hard disk drive actuater
US5663855A (en) * 1994-10-17 1997-09-02 Samsung Electronics Co., Ltd Magnetic latching apparatus for an actuator of a hard disk drive
KR0131421B1 (en) * 1994-10-17 1998-04-18 김광호 Actuator fixing device for hdd
KR970011818B1 (en) * 1994-10-28 1997-07-16 삼성전자 주식회사 Fixing apparatus of hdd actuator
US6091559A (en) 1994-12-19 2000-07-18 Mobile Storage Technology Inc. Variable zone layout and track pitch parameter considerations for information storage disk drive
US5596458A (en) 1994-12-19 1997-01-21 Integral Peripherals, Inc. Variable zone layout for information storage disk drive
KR100337842B1 (en) * 1995-04-26 2002-11-14 삼성전자 주식회사 Parking device for hard disc drive
US5812345A (en) * 1995-06-07 1998-09-22 Maxtor Corporation Monostable active latch for a disk drive actuator
US5798884A (en) 1995-12-13 1998-08-25 International Business Machines Corporation Multiple zone data storage system and method
US5717548A (en) * 1996-03-04 1998-02-10 Seagate Technology, Inc. Voice coil actuated bi-stable latch assembly
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
US6252745B1 (en) 1998-07-13 2001-06-26 Seagate Technology Llc Latch and linear crash stop for a disc drive actuator arm
GB2342762B (en) * 1998-10-12 2000-12-13 Samsung Electronics Co Ltd Magnetic latch
US6185074B1 (en) * 1998-12-29 2001-02-06 Western Digital Corporation Inertial latch having an interposer that prevents the head from leaving the ramp load during a shock event
US6473959B1 (en) 1999-05-07 2002-11-05 Seagate Technology Llc Method for latching a disc driver actuator
US7456595B2 (en) * 2005-04-18 2008-11-25 The Board Of Regents For Oklahoma State University Method and apparatus for adaptive control of a disk drive in the presence of non-linear magnetic bias
DE102012002247A1 (en) * 2012-01-31 2013-08-01 Günther Zimmer Linear axis with electric drive and currentless end position fixation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047712A1 (en) * 1980-12-18 1982-07-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart DC solenoid with armature guided along non-magnetic pin - has stroke limiting stop with compression spring between armature and pole piece
US4414594A (en) * 1982-02-26 1983-11-08 Atasi Corporation Linear actuator for a memory storage apparatus
DE8312653U1 (en) * 1983-04-29 1983-10-13 Basf Ag, 6700 Ludwigshafen INFORMATION STORAGE WITH POSITIONING DEVICE AND LIFTING MAGNET FOR IT
US4562500A (en) * 1983-05-25 1985-12-31 Tandon Corporation Mechanism for latching magnetic disk memory head/arm assembly in parking zone
US4594627A (en) * 1983-06-28 1986-06-10 Priam Corporation Safety latch for pickup heads and carriage disc drive
US4654735A (en) * 1984-11-13 1987-03-31 Ampex Corporation Latch for head positioning actuator for disc files
US4635151A (en) * 1985-01-25 1987-01-06 Priam Corporation Rotary actuator having preloaded spring crash stop
US4692829A (en) * 1985-09-13 1987-09-08 Quantum Corporation Magnetically biased aerodynamically released integral safety latch for rigid disk drive
US4890176A (en) * 1988-07-18 1989-12-26 Seagate Technology, Inc. Crash stop and magnetic latch for a voice coil actuator

Also Published As

Publication number Publication date
JPH05504646A (en) 1993-07-15
EP0473719A1 (en) 1992-03-11
WO1990014659A1 (en) 1990-11-29
DE69025609D1 (en) 1996-04-04
EP0473719B1 (en) 1996-02-28
EP0473719A4 (en) 1993-03-03
DE69025609T2 (en) 1996-10-02
US5023736A (en) 1991-06-11
CA2017100C (en) 1995-12-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed