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1. 发明专利

JPH06176526A OPTICAL DISK CARTRIDGE 失效
公开(公告)号：JPH06176526A
公开(公告)日：1994-06-24
申请号：JP32334392
申请日：1992-12-02
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST , HITACHI MAXELL
发明人： OTA HIROAKI , KANEDA NORIYA , TAKIZAWA HITOSHI , MIURA MAKOTO
IPC分类号： G11B23/02 , G11B23/03
摘要： PURPOSE:To suppress the adhesion of dust to an optical disk by preventing the electrification of the case of the optical disk cartridge. CONSTITUTION:A member (conductive plastic material, etc.) 3 which is not electrified to the extent of order of 10 OMEGA surface resistivity or below is applied or stuck to at least the inside surface of the case 2 made of nonconductive plastic. The case 2 itself is otherwise formed of the conductive plastic member. As a result, the inside surface of the case 2 is hardly electrified and, therefore, the optical disk 1 in proximity to the case 2 is hardly electrified as well and the generation of Coulomb force between the dust and the optical disk does not arise even if air contg. the electrified dust flows near to the optical disk 1. The adhesion of the dust on the optical disk 1 is thus suppressed. The effect is higher if the surface of the optical disk 1 is subjected to an antistatic treatment.

2. 发明专利

JPH03201285A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH03201285A
公开(公告)日：1991-09-03
申请号：JP33673589
申请日：1989-12-27
申请人： HITACHI LTD
发明人： KANEDA NORIYA , KURIBAYASHI AKIRA
IPC分类号： G11B33/14
摘要： PURPOSE:To stop the flow of external air contg. dust to the vicinity of an optical head to prevent dust from being stuck to the optical head by storing the optical head in an air chamber and flowing external air to the periphery of this air chamber to cool a device. CONSTITUTION:When a power source 41 and a circuit package board 40 are cooled by oscillation of a cooling fan 51a during recording/reproducing of an optical disk 36, external air B is caused to flow from an air hole 22 of a front panel 20. Air C is discharged from the cooling fan 51a and a louver 42 through spaces 60 and 61 partitioned by a chloroprene rubber 37 and a base cover 35 or the like. Thus, supply of external air to optical parts such as an optical head 33 covered with a base cover 35 is prevented to reduce dust stuck to optical parts.

3. 发明专利

JPH02168481A OPTICAL HEAD CLEANING METHOD AND CLEANING DEVICE FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH02168481A
公开(公告)日：1990-06-28
申请号：JP10784589
申请日：1989-04-28
申请人： HITACHI LTD
发明人： FUJIMOTO NOBUYUKI , IKEDA FUMIAKI , KANEDA NORIYA , SHIGEMATSU KAZUO , MIYAZAWA YOSHIYUKI
IPC分类号： G11B23/00 , G11B7/12 , G11B7/121 , G11B17/22
摘要： PURPOSE:To attain automatic cleaning of an optical head by moving the optical head while the cleaning fixture is loaded to an optical disk driver. CONSTITUTION:When a clean instruction of an optical head 6 of an optical disk driver 5 is outputted from a logical control section 9 by a command from a host controller 10 or the discrimination of the logic control section 9 itself, a carrier mechanism section 1 carries the cleaning fixture 12 to the optical disk driver 5 to move the cleaning fixture 12. In this case, since a brush 13 is in contact onto the surface of an optical head 6, dirt or dust adhered to the surface of the optical head 6 is eliminated.

4. 发明专利

JPS63247940A OPTICAL HEAD FOR MAGNETO-OPTICAL RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS63247940A
公开(公告)日：1988-10-14
申请号：JP8120187
申请日：1987-04-03
申请人： HITACHI LTD
发明人： KANEDA NORIYA
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To perform the rewrite of information in one revolution of a magneto- optical disk, by providing optical systems for recording and reproduction and for erasure, and a permanent magnet for magnetic field formation, and arranging a convergence lens at a position confronting with the same track position of the magneto-optical disk. CONSTITUTION:The track of the disk 10 is radiated by a laser beam from a recording and reproducing semiconductor laser 2 by using a convergence lens 6 confronting by interposing the optical system 4 for recording and reproduction, the permanent magnet 8 for recording and reproducing magnetic field formation, and the magneto-optical disk 10. The upstream side of the track 10 is radiated via an erasing convergence lens 5 confronting with a similar semiconductor lens 2 for erasure, the optical system 3 for erasure, and the permanent magnet 7 for erasing magnetic field formation. And the erasure of the information in one revolution of the disk 10 and the recording of the information on the erased part of the track are performed, thereby, it is possible to perform the rewrite of the information rapidly in one revolution of the disk.

5. 发明专利

JPS6342039A OPTICAL DISK DEVICE 失效
公开(公告)号：JPS6342039A
公开(公告)日：1988-02-23
申请号：JP18336186
申请日：1986-08-06
申请人： HITACHI LTD
发明人： KANEDA NORIYA , SAITO AKIRA , KURIBAYASHI AKIRA
IPC分类号： G11B7/085 , G11B7/09
摘要： PURPOSE:To surely and easily shorten the access time of an optical head by slantingly supporting a first structure body and providing a driving means which inclines the first structure body. CONSTITUTION:A second structure body 16 macro-seeks a laser beam A by driving an actuator 17, and the macro-seeked position is confirmed, and the first structure body 15 is driven by a driving means 31 and is inclined around a fulcrum 30, and the luminous flux path position of the laser beam A emitted from a semiconductor laser 18 is changed, and the laser beam A is moved to a desired track from the macro-seeked position on an optical disk 13 and is micro-seeked. In such a case, tracks which the laser beam A traverses to the desired track are counted to position it to the desired track. As the result, the micro-seek time is shortened because the luminous flux path position of the light source side is changed by turning to move the first structure body 15 to the desired track of the optical disk 13 at the time of micro-seek.

6. 发明专利

JPS62289928A TRACKING ACTUATOR FOR OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS62289928A
公开(公告)日：1987-12-16
申请号：JP9971387
申请日：1987-04-24
申请人： HITACHI LTD
发明人： KURIBAYASHI AKIRA , TAKAHASHI SADAO , KANEDA NORIYA
IPC分类号： G11B7/08 , G02B26/10 , G11B7/09
摘要： PURPOSE:To set a mirror initially an optically ideal position by providing a means which adjusts the angle of a mirror surface to an optical axis and a means which adjusts the position to an objective. CONSTITUTION:A mirror base 4 is fixed on a shaft 6 through an elastic support 5 and light in a direction A is reflected by the mirror 1 and made incident on a lens 10. A coil 2 is powdered on to rotate the mirror around an X axis through the operation of a magnetic 3 in an E direction and a body 7 and an adapter 9 are fitted with clearance left, and rotated to adjust the mirror surface at right angles to a lower surface. Further, the clamping force of a screw for mounting a block 8 is increased to displace the mirror 1 in a C direction through the deformation of the whole body. Thus, the mirror 1 of a mirror actuator for track servo is set initially by the simple adjustment and accuracy required for respective components is relaxed to easily adjust errors at the time of assembly.

7. 发明专利

JPS6214326A OPTICAL DISK DRIVING DEVICE 失效
公开(公告)号：JPS6214326A
公开(公告)日：1987-01-22
申请号：JP15220285
申请日：1985-07-12
申请人： HITACHI LTD
发明人： KURIBAYASHI AKIRA , KANEDA NORIYA , WATANABE MASATERU
IPC分类号： G11B7/00 , G11B7/004 , G11B23/50
摘要： PURPOSE:To reduce an error rate for the reproduction of information by providing a driving means which shifts a cleaning means to a position where a contact is secured with the disk surface in response to the action signal given from a host device owing to a reproduction error. CONSTITUTION:An optical disk controller 20 contains a reproduction error detector which decides whether the received information is correct or not. The controller 20 gives an instruction to an optical disk driving device 21 to clean the surface of an optical disk 1 via a brush 6 and to retry reproduction in case the reproduction is wrong due to the wrong information. When receiving said instruction, the driving device 21 lifts the brush 6 up to a position where the contact is secured with the surface of the disk 1 by means of a solenoid 5 in order to remove the dust, etc. Then the brush 6 is detached again from the surface of the disk 1. The brush 6 is kept contact with the surface of the disk 1 only when a reproduction error is produced. Other wise the brush 6 is kept away from the surface of the disk 1. This prevents the undesired damage given to the disk 1 and reduces the error ratio for the reproduction of information.

8. 发明专利

JPS61139950A Optical head 失效
标题翻译：光学头
公开(公告)号：JPS61139950A
公开(公告)日：1986-06-27
申请号：JP26047784
申请日：1984-12-10
申请人： Hitachi Ltd
发明人： KAMISADA TOSHIMASA , KANEDA NORIYA , TAKAHASHI SADAO , WATANABE MASATERU
IPC分类号： G02B27/09 , G02B27/00 , G11B7/135
摘要： PURPOSE: To correct a direction variation of a prism emitted light of the time of a temperature variation, and to prevent the generation of an error of a detecting signal of a focal position and track position detecting system by supporting a prism by a supporting body of a material of a different coefficient of thermal expansion.
CONSTITUTION: A laser beam 2 is corrected as to a direction variation of an emitted light caused by a wavelength variation, by a prism 4 consisting of two kinds of prisms 5, 6 having each different wavelength - refractive index characteristic, reaches a disk 14, and one of its reflected lights detects a track position by a detector 16, and the other detects a focal position by a detector 20. By a temperature variation, the prism 4 emitted beam is varied by a direction θ and gives an error to a detecting signal. Arms 8, 9 for supporting the prism 4 are constituted of a material of a different coefficient of thermal expansion. Accordingly, the direction variation θ of the emitted beam of the prism 4 is corrected, so that an error of a focal position and track position detecting system is not generated.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了校正温度变化时间的棱镜发射光的方向变化，并且通过由支撑体支撑棱镜来防止产生焦点位置和轨道位置检测系统的检测信号的误差不同热膨胀系数的材料。构成：通过由具有不同波长折射率特性的两种棱镜5,6组成的棱镜4到达光盘14，激光束2被校正为由波长变化引起的发射光的方向变化，并且其反射光中的一个由检测器16检测轨道位置，另一个通过检测器20检测焦点位置。通过温度变化，棱镜4发射的光束由方向θ变化并给出检测误差信号。用于支撑棱镜4的臂8,9由不同热膨胀系数的材料构成。因此，校正棱镜4的发射光束的方向变化θ，使得不产生焦点位置和轨道位置检测系统的误差。

9. 发明专利

JPS59210540A Detector for shift of light spot position 失效
标题翻译：用于移动光点位置的检测器
公开(公告)号：JPS59210540A
公开(公告)日：1984-11-29
申请号：JP8266383
申请日：1983-05-13
申请人： Hitachi Ltd
发明人： NAKAMURA SHIGERU , KANEDA NORIYA
IPC分类号： G02B7/00 , G11B7/08 , G11B7/09
CPC分类号： G11B7/0908
摘要： PURPOSE:To facilitate greatly a fine adjustment of a light spot position within a surface vertical to the optical axis by performing a coarse adjustment within a surface including the optical axis in place of said fine adjustment after tilting a lens or a parallel planar plate to the optical axis. CONSTITUTION:The refractive index (n) and the thickness (d) of a glass plate 22 containing an angle adjustment mechanism are set at 1.5 and 0.25mm. respectively. Thus the plate 22 has a coarse adjustment mechanism of about 15 deg. in place of a fine adjustment mechanism of about 20mum for inserting direction of a knife 9. In other words, the rectilinear part of a luminous flux on the surface of a photodetector 52 is shifted toward an arrow 24 by a coarse angle adjustment 23 of the plate 22 and with the same effect as the fine adjustment for inserting direction of the knife 9. Therefore both photodetecting parts 5E and 5F are controlled to the positions where they receive a slight amount of light. The outputs of both parts 5E and 5F are converted into the focus shift signals by a differential circuit 25 and supplied to a coil 26 which moves a lens 2, for example. Thus it is possible to control a focal point 0 onto the surface of a disk 1 at all times.
摘要翻译：目的：通过在将透镜或平行平面板倾斜到所述光轴之后通过在包括光轴的表面内进行粗调而代替所述微调，从而大大地微调垂直于光轴的表面内的光点位置光轴。构成：包含角度调节机构的玻璃板22的折射率（n）和厚度（d）设定为1.5和0.25mm。分别。因此，板22具有约15度的粗调节机构。代替用于插入刀9的方向的大约20um的微调机构。换句话说，光电检测器52的表面上的光通量的直线部分通过粗略的角度调节23向箭头24移动并且具有与用于插入刀9的方向的微调相同的效果。因此，两个受光部5E和5F被控制到它们接收到轻微光量的位置。例如，通过差分电路25将部分5E和5F的输出转换成焦点偏移信号，并将其提供给移动透镜2的线圈26。因此，可以始终将焦点0控制在盘1的表面上。

10. 发明专利

JPS59168973A Dust preventing and removing mechanism of carriage 失效
标题翻译：防止和去除运输机制
公开(公告)号：JPS59168973A
公开(公告)日：1984-09-22
申请号：JP4218483
申请日：1983-03-16
申请人： Hitachi Ltd
发明人： MURAOKA KOUJI , UNO MOTOO , KANEDA NORIYA
IPC分类号： F16C29/04 , F16C29/00 , G11B21/00 , G11B21/02
CPC分类号： G11B21/00
摘要： PURPOSE:To prevent the increase and the variation of the frictional force of a bearing due to the influence of dust and reduce the number of parts and the increase of weight to make conversion easy, by providing an elastic deforming material which is attached into a cap covering the bearing and is brought into contact with the surface of a rail in the longitudinal direction. CONSTITUTION:A duct removing material 9 is moved on the surface of a rail 1 in accordance with the movement of a carriage 3, and dust on the rail 1 is removed by this operation. A dust-proof cap 8 prevents not only dropped or floated dust from sticking to the outside wheel of a bearing 10 but also dust from penetrating the bearing 10 from gaps of the bearing 10. Since the dust- proof cap 8 is pressed to a shaft 11 with a proper force, attaching parts are not especially required, and it is not slipped off in the normal use. Since the increase of the weight of the part of the dust-proof cap 8 is slight and the dust removing material 9 has the end face brought into contact with the rail 1, the increase of the force of rolling friction is slight. Consequently, the replacement of the dust preventing and removing mechanism is easy, and positioning control and maintenance are made easy.
摘要翻译：目的：为了防止由于灰尘的影响引起的轴承摩擦力的增加和变化，减少零件数量和增加重量以使转换变得容易，通过提供一种弹性变形材料，其被附接到盖覆盖轴承并且在纵向方向上与轨道的表面接触。构成：根据滑架3的移动，导管移除材料9在导轨1的表面上移动，并且通过该操作去除导轨1上的灰尘。防尘盖8不仅防止落下或漂浮的灰尘粘附到轴承10的外轮上，而且防止从轴承10的间隙穿透轴承10的灰尘。由于防尘盖8被压到轴 11具有适当的力，附着部件不是特别需要的，并且在正常使用中不会滑落。由于防尘盖8的一部分的重量的增加是轻微的，并且除尘材料9的端面与导轨1接触，因此滚动摩擦力的增加是轻微的。因此，更换防尘除尘机构容易，并且容易进行定位控制和维护。

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