公开(公告)号：JPH11339411A

公开(公告)日：1999-12-10

申请号：JP12082499

申请日：1999-04-28

Applicant: IBM

Inventor： THOMAS R ALBRECHT ,  CHARLES H HEINO JR ,  TSUAI WEI WOO

IPC: G11B21/12 ,  G11B5/54 ,  G11B5/55 ,  G11B21/22

Abstract: PROBLEM TO BE SOLVED: To make avoidable the position deviation due to the thermal expansion to easily and accurately mount by comprising a load-unload ramp defining the ramp-disc spacing from a data memory disc and selecting the thermal expansion coefficient of a rigid support structure to be mounted so that the ramp-disc spacing is const. during temp. change. SOLUTION: The material of a rigid support structure 52 is selected to have a thermal expansion rigorously agreeing with that of a spindle 26, and the spindle 26, spacer ring 29, disc 30 and rigid support structure 52 are pref. made of the same material. A ramp unit 50 moves due to the expansion/shrinkage of the rigid support structure 52 and has a small vertical range 55 and hence the thermal expansion movement of the rigid support structure 52 dominates over that of the ramp 32. The spindle 26 and the rigid support structure 52 expand/shrink at the same proportion and hence the spacing 38 between the ramp and disc is const. in a disc plane-ramp pair.

公开(公告)号：JPH10312657A

公开(公告)日：1998-11-24

申请号：JP11665997

申请日：1997-05-07

Applicant: IBM

Inventor： KOYANAGI ICHIRO ,  KOBAYASHI YUJI ,  SAI FUMINORI ,  THOMAS R ALBRECHT

IPC: G11B5/54 ,  G11B21/12 ,  G11B21/22

Abstract: PROBLEM TO BE SOLVED: To provide an integrally molded ramp for withdrawing a suspension arm of the information recording and reproducing device. SOLUTION: The ramp 200 is equipped with sliding parts 220 and 250 formed with guide surfaces 221, 222, 223, 224 and 225 and also a withdrawing surface 226 flat. Since boundaries among the individual guide surfaces and the withdrawing surface are formed parallel to a reference line, even when the withdrawing surface 226 is formed in a depressed shape, mold casting can be performed by drawing a mold in the direction of the reference line. A part formed by the same casting mold as the sliding part 220 and the sliding part 250 out of a supporting part 210 is formed not to be an obstable to drawing the mold in the direction of the reference line. The integrally molded ramp 200 has high manufacturing accuracy, and is excellent in accurate demarcation of a loading/ unloading position of the suspension arm.

公开(公告)号：JPH10302421A

公开(公告)日：1998-11-13

申请号：JP11060097

申请日：1997-04-28

Applicant: IBM

Inventor： AOYANAGI AKIHIKO ,  INOUE HIROO ,  KOYANAGI ICHIRO ,  NAKAMURA TAKASHI ,  AOKI TATSUJI ,  THOMAS R ALBRECHT

IPC: G11B21/22 ,  G11B21/12

Abstract: PROBLEM TO BE SOLVED: To facilitate the controlling of a head arm by reducing shavings of ramps in a head holding mechanism to reduce changes of friction factors of the ramps and to make the speed of the head arm at the time of loading and unloading of a head constant. SOLUTION: In ramps 62 of a ramp block 6, the dried lubrication coating film consisting essentially of polytetrafluorethylene is formed on a surface areas 62g including a contact part 62f with a suspension assembly constituting a head arm. Moreover, the film is also formed on a contact part with the ramps 62 in the tab of the suspension assembly. However, the contact part of the tab slides on the contact part 62f of the ramps at the time of loading and unloading of the head, since the resin coating film is formed on the contact part between the ramps 62 and the tab, the shavings of ramps 62 are reduced.