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1. 发明专利

JPS6417270A SERVO-HEAD ARM STRUCTURE FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS6417270A
公开(公告)日：1989-01-20
申请号：JP17090187
申请日：1987-07-10
申请人： HITACHI LTD
发明人： HOSOKAWA HARUHIKO , SASAMOTO ASAO , AMANO HIDEAKI , SHIONO TOSHIO , TAKATSUKA AKIO , OKAMOTO SHIGERU , MAEDA MUNESHIGE , SOGABE CHIKAYUKI
IPC分类号： G11B21/16 , G11B5/48 , G11B5/55 , G11B5/596 , G11B21/02 , H05K1/02
摘要： PURPOSE:To eliminate the generation of an off-track due to the dislocation of a servo-head by making the curvature due to the thermal expansion of a head arm and servo-head arm about the same. CONSTITUTION:The amplifier packaging part 10 of a servo-head arm 31 has the function separating from a servo-head arm main body 11 by the U-shaped oblong hole 12 provided on the servo-head arm 31, and the amplifier packaging part 10 and servo-head arm main body 11 are linked by a servo-head arm main body connection part 13. The curvature caused on the servo-head arm main body 11 becomes that only caused by the difference in the thermal expansion coefft. of the signal wire of the servo-head arm main body 11 and a flexible circuit 9, and this becomes equal to the curvature caused by the signal wire of a data head arm and the flexible circuit 9. The generation of an off-track by the servo-head dislocation can thus be eliminated even in the case of an environmental temp. being changed.

2. 发明专利

JPS61296590A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS61296590A
公开(公告)日：1986-12-27
申请号：JP13601685
申请日：1985-06-24
申请人： HITACHI LTD , HITACHI COMPUTER KIKI KK
发明人： SOGABE CHIKAYUKI , SASAMOTO ASAO , ISHIKAWA ATSUSHI , KUMAGAI ISATO , ANDO KATSUTOSHI , YOKOYAMA NOBUHIRO
IPC分类号： G11B33/14
摘要： PURPOSE:To remove efficiently dust in the inside of an enclosed device by placing a shield plate between a magnetic disc and a filter and fitting obliquely the filter. CONSTITUTION:The filter 8 is provided above the magnetic disc 2, a shield plate 9 is given between the filter 8 and the magnetic disc 2 and an enclosed cover 10 is provided in a magnetic disc, then the pressure above a clamp 4 is lowered by fir flow (pressure change) caused by the rotation of the magnetic disc 2 and the pressure is increased by the peripheral part of the magnetic disc 2, a carriage 6 and a linear motor, and the pressure difference is utilized to place obliquely the filter 8 between the pressure difference. Thus, the air in the inside of the enclosed case is given to the filter efficiently to catch dust.

3. 发明专利

JPS61151891A PACKING METHOD FOR CIRCUIT SUBSTRATE FOR DISK DEVICE 失效
公开(公告)号：JPS61151891A
公开(公告)日：1986-07-10
申请号：JP27287684
申请日：1984-12-26
申请人： HITACHI LTD
发明人： SASAMOTO ASAO , SOGABE CHIKAYUKI , YAMAURA SATORU , HANADA KAZUYOSHI , ISHIKAWA ATSUSHI
IPC分类号： G11B33/12 , G11B25/04
摘要： PURPOSE:To reduce the height of a disk device by putting a circuit substrate between disks. CONSTITUTION:A disk 3 is set to a spindle hub 2a of a spindle motor 2 with a certain space via a disk spacer 16. A head 4 seeks the surface of the disk 3 by a voice coil motor 15. A circuit substrate 8 which is hollowed out with no contact with the spacer 16 is put into a space at a place excluding the position of the head 4 set between disks. The signals are supplied to the head 4 and a main substrate 18 via cables 11 and 10 respectively. The substrate 8 is attached to a projected part 19 from a base 1 with a screw 9 so as to avoid a contact with the disk 3. Thus the two conventional circuit substrates packed to the outside of the base 1 can be reduced down to just one. This reduces the size of a disk device as a whole.

4. 发明专利

JPS59203271A Head positioning mechanism of magnetic disc device 失效
标题翻译：磁盘装置的头部定位机构
公开(公告)号：JPS59203271A
公开(公告)日：1984-11-17
申请号：JP7741983
申请日：1983-05-04
申请人： Hitachi Ltd
发明人： SOGABE CHIKAYUKI
IPC分类号： G11B21/02 , G11B5/55
CPC分类号： G11B5/5521
摘要： PURPOSE:To reduce the number of parts and facilitate the assembling work by fixing a pivot shaft onto a base and fitting a swing arm rotatably to this shaft through a bearing. CONSTITUTION:A head 1 for information write/read, a swing arm 2 which supports this head 1, and a pivot shaft 3 are provided, and this pivot shaft 3 is fixed to a base 6. The inside wheel of a bearing 7 is fitted and fixed to the pivot shaft 3, and the outside wheel of the bearing 7 is fitted and stuck to the swing arm 2. Consequently, the swing arm 2 can be rotated smoothly in the direction of an arrow B with the pivot shaft 3 as the center. A pre-load is applied to the bearing 7 from above by the spring pressure of a spring 9 for the purpose of eliminating ''play'' in the thrust direction to stabilize the rotation of the swing arm 2.
摘要翻译：目的：通过将枢轴固定在基座上，通过轴承将摆臂可旋转地安装在该轴上，减少了零件数量，便于组装工作。构成：用于信息写入/读取的头1，支撑该头1的摆臂2和枢轴3，并且该枢轴3固定到基座6.轴承7的内轮安装并固定在枢轴3上，并且轴承7的外轮嵌合并固定在摆臂2上。因此，摆臂2能够沿着箭头B的方向平滑地转动，其中枢轴3为中央。为了消除摆动臂2的旋转，推力方向上的“打”，由弹簧9的弹簧压力从上方向轴承7施加预载荷。

5. 发明专利

JPS5827885B2 失效
公开(公告)号：JPS5827885B2
公开(公告)日：1983-06-13
申请号：JP1242177
申请日：1977-02-09
申请人： HITACHI LTD
发明人： KAWADA SHINICHI , SOGABE CHIKAYUKI , IKEDA MINORU
IPC分类号： G11B5/596 , G11B5/56 , G11B21/10

6. 发明专利

JPS5398805A SERVO INFORMATION WRITING METHOD 失效
公开(公告)号：JPS5398805A
公开(公告)日：1978-08-29
申请号：JP1242177
申请日：1977-02-09
申请人： HITACHI LTD
发明人： KAWADA SHINICHI , SOGABE CHIKAYUKI , IKEDA MINORU
IPC分类号： G11B5/596 , G11B5/56 , G11B21/10
摘要： PURPOSE:To facilitate the wite position controlling of servo information and the position detection of heads by writing the servo information by maintaining the azimuth difference of a servo information writing head and a head for magnetic disc apparatus within a permissible limit.

7. 发明专利

JPH01300483A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01300483A
公开(公告)日：1989-12-04
申请号：JP13011088
申请日：1988-05-30
申请人： HITACHI LTD
发明人： HOSOKAWA HARUHIKO , SASAMOTO ASAO , AMANO HIDEAKI , SHIONO TOSHIO , SOGABE CHIKAYUKI , TAKATSUKA AKIO , HANADA KAZUYOSHI
IPC分类号： G11B23/00 , G11B17/038 , G11B23/03
摘要： PURPOSE:To prevent thermal off-track in a device from being generated by forming the receiving plane of a magnetic disk on the hub of a spindle motor in projecting circular arc shape, and providing notches continuing from the receiving plane of the disk on the side plane of the cylinder part of the hub. CONSTITUTION:The cross-secitonal shape of the working face of a hub flange part 27 with the magnetic disk 6 is formed in the same shape as the working face of a disk clamp 5 with the magnetic disk 6 by forming in the projecting circular arc shape, which changes face working to line working. In other words, it is constituted in such a way that the inclination of a disk plane does not depend on that of the working face of the hub flange part 27 with the magnetic disk 6. Next, the notches continuing with continuous planes from the projecting circular arc plane of the hub flange part 27 are provided on a hub cylindrical part 28, and a spring property is attached by thinning the thickness of a cylinder to connect the hub cylindrical part 27 to the hub flange part 27, thereby, the displacement of the hub flange part 27 can be prevented from affecting on the deformation of the shape of the hub cylindrical part 28. In such a way, it is possible to prevent the thermal off-track due to the inclination of the disk plane from being generated.

8. 发明专利

JPH01171169A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01171169A
公开(公告)日：1989-07-06
申请号：JP32700987
申请日：1987-12-25
申请人： HITACHI LTD
发明人： SOGABE CHIKAYUKI , SASAMOTO ASAO , SHIONO TOSHIO , HOSOKAWA HARUHIKO , TAKATSUKA AKIO , HANADA KAZUYOSHI
IPC分类号： G11B21/02 , G11B25/04
摘要： PURPOSE:To prevent misalignment of a head due to residual torque in tightening a screw by putting a washer having a spring property between a head bar and a head clamp and pressing the head clamp so as to hold down the head bar to be fixed with. CONSTITUTION:In a carriage assembly part with a carriage 4 fitted alternately with the head bar and a head spacer 9, a magnetic head 6 is fixed to the carriage 4 by fixedly holding the magnetic head 6 between the carriage 4 and the head clamp 7. That is, the washer 12 having a spring property is placed between the head bar and the head clamp 7, and when the head clamp 7 is force-fed, the washer 12 is bent and under the state of holding the head bar so as to carry out the force-fed fixing via a steel ball 8 between the carriage 4 and the head clamp 7. The magnetic head is fixed to the carriage at a constant pressure by expanding or contracting of the washer 12 with its spring property to cope with size variations caused by the environmental temp. change due to differences among individual materials in coefficient of expansion. By this method, since an effect of residual screw torque in case of using a screw is not received, misalignment of the magnetic head is hence eliminated.

9. 发明专利

JPH01169783A HEAD ASSEMBLY SUPPORTING STRUCTURE FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH01169783A
公开(公告)日：1989-07-05
申请号：JP32700687
申请日：1987-12-25
申请人： HITACHI LTD
发明人： SHIONO TOSHIO , SASAMOTO ASAO , SOGABE CHIKAYUKI , TAKATSUKA AKIO , HOSOKAWA HARUHIKO
IPC分类号： G11B21/02
摘要： PURPOSE:To improve assembling property and to attain a high speed rotation by assembling a contact and a spring to a supporting point spindle part to contact with a bearing with a snap ring and eliminating the play of a radius direction between a head assembling body and the supporting point spindle. CONSTITUTION:In a free condition, a contact 4 is limited its projecting quantity by a snap ring 6, and projected from the diameter of a supporting point spindle 2 for a dimension D. When two bearings 3 is inserted from the supporting point spindle 2 upper part to a bond-fixed head assembling body 1, the contact 4 is brought into contact with the lower bearing 3 pushes a spring 5, the lower part bearing 3 passes by this deflection. After passing, the contact 4 projects again, next, the upper and lower bearings 3 push the upper and lower contacts 4, they are assembled by the deflection of the spring 5 at two place at the same time, the contact 4 and the spring 5 do not project from a channel inside, assembling property is improved, the moment of inertia of the head assembling body is reduced, and a high speed rotation can be attained.

10. 发明专利

JPS63253848A ACTUATOR DRIVING COIL FOR MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS63253848A
公开(公告)日：1988-10-20
申请号：JP8307487
申请日：1987-04-06
申请人： HITACHI LTD
发明人： TAKATSUKA AKIO , SASAMOTO ASAO , SHIONO TOSHIO , SOGABE CHIKAYUKI , HOSOKAWA HARUHIKO
IPC分类号： H02K33/18
摘要： PURPOSE:To raise the generation efficiency of a driving force to contrive a high speed accessibility by making the length of a coil slightly longer than that of a magnetic flux generating air-gap. CONSTITUTION:When power is applied from a driving power through a leader line 18, 18' to an actuator driving coil composed of coil 7, 7' and conductor 10, 11, a magnetic flux 20, 20' is generated in a magnetic flux generating air-gap 19, 19' between magnet 3, 3' and center yoke 2. In this case, a driving force F of actuator generated in said coil is expressed by an equation. Also, the length l1 of said coil 7, 7' is almost equal to or slightly longer than the length l2 of said magnetic flux generating air-gap 19, 19', the ratio of the length of a part crossing the magnetic flux generating air-gap 19, 19' to the total length of the actuator driving coil is made larger and the ineffective part of said coil is decreased. Therefore, the generation efficiency of a driving force can be raised, because it is possible to increase the effective activity ratio of a coil and to make the resistance of said coil to a supply voltage relatively small.

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