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1. 发明专利

JPS60139143A COIL FOR VOICE COIL MOTOR 失效
公开(公告)号：JPS60139143A
公开(公告)日：1985-07-23
申请号：JP24383883
申请日：1983-12-26
申请人： HITACHI LTD
发明人： HIRANO YOSHIYUKI , KAWAKUBO YOUICHI , SEO YOUSUKE , KAWAKAMI SHIYUU , SENDA TOMOHISA , KAWADA SHINICHI
IPC分类号： H01F5/06 , H02K3/30 , H02K33/18 , H02K41/035
摘要： PURPOSE:To enhance the heat resistance of a coil by securing the coil with glass. CONSTITUTION:A bobbin 1 of aluminum is inserted into a core 2. A winding 3 coated with a ceramic is wound on the bobbin 1. A mold releasing material 4 made of silicon is coated between the bobbin 1 and the core 2. A liquid glass 5 is impregnated with the winding, heated at 400 deg.C in a furnace for 1hr, and then cooled in the atmosphere. Thus, the allowable temperature of the coil can be raised.

2. 发明专利

JPS63153770A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS63153770A
公开(公告)日：1988-06-27
申请号：JP18102487
申请日：1987-07-22
申请人： HITACHI LTD
发明人： KIMURA HIDEYUKI , TAKAHASHI TAKESHI , SENDA TOMOHISA , NISHIMURA YUJI , NISHIDA HIROSHI , TORII TAKUJI
IPC分类号： G11B21/02
摘要： PURPOSE:To reduce the thermal off-track by constituting a magnetic head supporting guide arm by an aluminum group material having an equal thermal expansion rate to that of a tightening member coupling both the guide arms and arm holders of plural number individually. CONSTITUTION:A magnetic head 4 is fitted to the guide arm 1 via the load arm 5 and the arm holder 2 is fitted to the pibot shaft 6 of a carriage assembly by a screw 7 and a VCM coil 8 is fitted to one end of the holder 2. Moreover, a side plate 9 is fitted to the holder 2 and the arm 1 is coupled by the head pin 3 to the holder 2. A spacer 10, a washer 11 and a nut 2 for coupling are provided and the contact point between the arm 1 and the holder 2 is contact points 13, 14, 15. The arm 1, the holder 2 and the pin 3 are in accurate motion as shown in the arrow 6 around the pivot shaft 6 and the magnetic head 4 is positioned on a prescribed track on the disk. The material for the pin 3 is selected to be an aluminum group material having the similar thermal expansion rate to that of the arm 1 and the holder 2 and the strength of the pin 3 is selected to be the same as that of a ordinary stainless-made pin.

3. 发明专利

JPS59165282A Magnetic disc fixing mechanism 失效
标题翻译：磁盘固定机构
公开(公告)号：JPS59165282A
公开(公告)日：1984-09-18
申请号：JP3924183
申请日：1983-03-11
申请人： Hitachi Ltd
发明人： SENDA TOMOHISA , OOTSUKA MASAKI , MORIYAMA KANICHI , EBIHARA SUSUMU , TAKAHASHI TAKESHI
IPC分类号： G11B17/038 , G11B19/20
CPC分类号： G11B17/038
摘要： PURPOSE:To correct the eccentricity of a magnetic disc by providing plural cam mechanisms on a circle smaller than the innermost circumference of the magnetic disc taking the rotating center of a rotating body as its center to guide an inner circumference of the magnetic disc by the cam mechanisms. CONSTITUTION:Cams 5 of the identical shape interlocked with the turning of the shaft 4 are provided to the shaft 4 corresponding to magnetic discs 7 to guide the discs 7 for stacking. In stacking the discs, the cams 5 are placed with much fitting clearance as shown in solid lines in figure, and then each shaft 4 is turned by an equal amount to a reference position so that the cams come to a position shown in broken lines thereby decreasing the clearance gradually. The reference position is set to a point 11 where the remotest point 12 of the cams 5 from the center of the shaft 4 is closest to the rotating center 0 as shown in, e.g., black point 11. In turning each shaft 4 by an equal amount to the reference position 11, when all the cams contact the magnetic discs 7, the geometrical center of the magnetic discs 7 is coincident with the rotating center 0 because the shape of each cam 5 is in accordance with the same standards.
摘要翻译：目的：为了通过在以旋转体的旋转中心为中心的小于磁盘的最内周的圆上设置多个凸轮机构来校正磁盘的偏心度，以通过凸轮引导磁盘的内圆周机制。构成：与轴4的转动互锁的相同形状的凸轮5设置在对应于磁盘7的轴4上，以引导盘7进行堆叠。在堆叠盘时，凸轮5以图中实线所示的非常安装的间隙放置，然后每个轴4转动相当于参考位置的量，使得凸轮进入虚线所示的位置，由此逐渐减少清除。参考位置被设定为点11，其中凸轮5的最远点12从轴4的中心最接近旋转中心0，如例如黑点11所示。在将每个轴4转动相等的位置相当于参考位置11，当所有凸轮接触磁盘7时，磁盘7的几何中心与旋转中心0重合，因为每个凸轮5的形状都符合相同的标准。

4. 发明专利

JPS59147119A Roller bearing equipped with seal mechanism 失效
标题翻译：带密封机构的滚子轴承
公开(公告)号：JPS59147119A
公开(公告)日：1984-08-23
申请号：JP2148283
申请日：1983-02-14
申请人： Hitachi Ltd
发明人： SUZUKI TOMIO , TAKAHASHI TAKESHI , MORIYAMA KANICHI , EBIHARA SUSUMU , SENDA TOMOHISA
IPC分类号： F16C33/82 , F16C33/10 , F16C33/76 , F16J15/43
CPC分类号： F16C33/765 , F16J15/43
摘要： PURPOSE:To obtain certain sealing faculty with a small-sized and lightweight constitution by allowing a bearing itself to be provided with a magnetic sealing mechanism. CONSTITUTION:A roller bearing equipped with sealing mechanism is constituted of an annular outer ring 3, inner ring 2, a plurality of rolling bodies 1 (spere), retainer 6, annular disc-shaped magnets 12 fixed in the upper and the lower parts inside the outer ring 3, and the magnetic 20 fluid which fills the part between the disc-shaped magnets 12 and the inner ring 2. Since the disc shaped magnet 12 is magnetized in the radial direction, a magnetic circuit is constituted of the inner ring 2 and the outer ring 3 which are made of magnetic material, and the magnetic fluid 20 which has a magnetic-flux density of 500-2,000 gauss and fills the annular gap 13 having a length of 1-0.3mm. between the inner ring 2 and the magnets 12 seals the gap by the magnetic force of said fluid, and thus sealing faculty can be secured.
摘要翻译：目的：通过允许轴承本身设有磁性密封机构，获得具有小型轻型结构的某些密封系。构成：装有密封机构的滚子轴承由环形外圈3，内圈2，多个滚动体1（多个），保持架6，固定在上部和下部内部的环形盘状磁体12构成外圈3和填充盘状磁体12和内圈2之间的部分的磁性体20。由于盘状磁体12沿径向磁化，所以磁路由内圈2 以及由磁性材料制成的外圈3和具有500-2000高斯的磁通密度并填充长度为1-0.3mm的环形间隙13的磁性流体20。在内圈2和磁体12之间通过所述流体的磁力密封间隙，从而可以固定密封件。

5. 发明专利

JPS6473572A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS6473572A
公开(公告)日：1989-03-17
申请号：JP22950587
申请日：1987-09-16
申请人： HITACHI LTD
发明人： KOJIMA TOSHIAKI , TAKAHASHI TAKESHI , SENDA TOMOHISA , KIMURA HIDEYUKI
IPC分类号： G11B21/02
摘要： PURPOSE:To make off-track quantity small by fixing a magnetic member constituting a voice coil motor to a carriage block and inserting a plate for making frictional force small. CONSTITUTION:When the magnet member 7 constituting the voice coil motor is fixed to the carriage block 9, the small plates 13 and 14 of which frictional factor is small is inserted between them to make the magnetic member 7 to be easily slided. One end of the magnetic member 7 is regularly fixed by a screw 10 and the other end is tightened with prescribed torque of which degree makes the magnetic member 7 to be begun to be slided by a screw 11. A belleville spring is used as locking. Therefore, accompanied with the change of temperature, the magnetic member 7 can be slided in a seek direction. Thus, the off-track come from the difference of coefficient of thermal expansion caused by the difference of the material between the magnetic member 7 and the carriage block 9 can be actually eliminated.

6. 发明专利

JPS61165874A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS61165874A
公开(公告)日：1986-07-26
申请号：JP567285
申请日：1985-01-18
申请人： HITACHI LTD
发明人： AZUMA MIKIO , NISHIDA HIROSHI , SUZUKI MASAMI , SENDA TOMOHISA , OTSUKA KIYOMITSU
IPC分类号： G11B23/03 , G11B17/02 , G11B17/038 , G11B23/00 , G11B25/04
摘要： PURPOSE:To reduce the revolving unbalance degree of a spindle rotor for a magnetic disk and to obtain a highly accurate spindle, by loading magnetic disks laminated onto a spindle with a gap formed between a spaser and a hub deflected at positions opposite to each other by 180 deg. for each disk. CONSTITUTION:A spindle part contains a hub 7 to which magnetic disks 1 and spacers 8 are laminated, a clamp 13 which connects the disks 1 and spacers 8 to the hub 7, a shaft 10 connected by the hub 7 by a shrink fit method, etc., a bearing 11 which supports the shaft 10 and housing 9 which supports the bearing 11. An assembling process is carried out so that the gap parts 28 formed by the hub 7, spacers 8 and disks 1 are deflected at positions opposite to each other by 180 deg. for each disk 1. In such a constitution, the revolving unbalance degree due to the disks and spacers and be greatly reduced. Thus a balancing job is omitted.

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