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1. 发明专利

JP2550850B2 失效
公开(公告)号：JP2550850B2
公开(公告)日：1996-11-06
申请号：JP6158893
申请日：1993-03-22
申请人： HITACHI LTD
发明人： SUGYAMA TOSHIO , IKUMA AKITOMO
IPC分类号： G11B17/028

2. 发明专利

JPH02276029A OBJECTIVE LENS DRIVER 失效
公开(公告)号：JPH02276029A
公开(公告)日：1990-11-09
申请号：JP9514389
申请日：1989-04-17
申请人： HITACHI LTD
发明人： SAEGUSA SHOZO , KATO MORIKAZU , SAITO HIROSHI , IKUMA AKITOMO
IPC分类号： G11B7/09
摘要： PURPOSE:To make a lead wire unnecessary and to eliminate a residual vibration by composing a device so that the moving freedom degree of an actuator may be regulated only in the two axial directions, and providing a supporting spring used as the lead wire as well. CONSTITUTION:A suspension 8 made of, for example, phosphor bronze is provided on an actuator moving part 1, and the suspension 8 supplys a current to an AF directional coil 4. The coil 4 is the AF direction driving coil, has a pin 6 erected perpendicularly to a yoke 5 at the center part, by vertically moving the pin, an operation in the AF direction is obtained, by rotating around the pin 6, the lens 2 rocks in the lateral direction, and the operation in the TR direction is attained. In addition, a balance weight 7 of the coil exists on the side reverse to the pin of an objective lens 2, and the balance in the longitudinal direction is adjusted with the pin 6 as the center. By the effects of the balance and the pin, even when the actuator concerned seeks in the lateral direction, namely, the TR direction, the actuator concerned is not vibrated. Thus the residual vibration due to the inertia delay can be prevented.

3. 发明专利

JPH02168437A DISK RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH02168437A
公开(公告)日：1990-06-28
申请号：JP28361288
申请日：1988-11-11
申请人： HITACHI LTD
发明人： OISO KAZUMASA , SATAKE MITSUO , IKUMA AKITOMO , MORI SHIGEKI , HIRATA TOMOMI , USAMI SHINICHI , ENOKI TAKASHI , BABA TATSUO
IPC分类号： G11B7/12
摘要： PURPOSE:To avoid damage to an objective lens and to improve the reliability by providing a brush eliminating dust adhered to an objective lens of a signal read section automatically and moving the brush and the signal read section relatively. CONSTITUTION:With a disk ejected, a brush 2 engaged with a holder 4 is moved toward a turn table 9 so as to be loaded in a moving area of a pickup 3. When the pickup 3 is moved toward the outermost circumference in advance in this case, the objective lens 1 passes while being in contact with the brush 2 and the dust on the lens is eliminated. As soon as the disk 13 is ejected, even if a lock van 10 is turned and lifted up, since the pickup 3 exists in a slidable range, the dust is completely eliminated by reciprocating the pickup 3 for several number of times under the control of a motor 6.

4. 发明专利

JPS60136922A OBJECTIVE LENS DRIVER 失效
公开(公告)号：JPS60136922A
公开(公告)日：1985-07-20
申请号：JP24394783
申请日：1983-12-26
申请人： HITACHI LTD
发明人： SAEGUSA SHIYOUZOU , TOMIMORI NAOKO , IKUMA AKITOMO , OKUDA TADASHI
IPC分类号： G11B7/09
摘要： PURPOSE:To decrease a read/write error of optical information and to improve the S/N by arranging a coil spring formed with thin and long metallic wires wound closely to a vertical face and an optical aixs and conducting the automatic focus operation so as to reduce excessive vibration. CONSTITUTION:A lens holding frame 13 and an outer frame 14 are applied with plastic molding after plastic molding molds are arranged while whose centers are made coincident and coil springs 11 are arranged with equal angle. An outer circumference fixing metal fixture 15 is inserted to a faucet part 14a of one set of lens support members 12 made of the spring 11, the center of insertion is made coincident automatically and a claw 15a makes vertical positioning of a driving magnetic circuit 9. After a lens barrel 17 is assembled and inserted with an actuator coil 10 and luminous flux stopping objective lens 4, an upper side lens support member 12 is inserted. The ease of assembling is ensured while keeping the accuracy and very large damping as a vibration system by the coil springs is obtained.

5. 发明专利

JPS6040535A OBJECTIVE LENS DRIVER 失效
公开(公告)号：JPS6040535A
公开(公告)日：1985-03-02
申请号：JP14809083
申请日：1983-08-15
申请人： HITACHI LTD
发明人： OKUDA TADASHI , IKUMA AKITOMO , IEGI KOUICHI , IYO KUNIAKI
IPC分类号： G02B7/00 , G11B7/09
摘要： PURPOSE:To decrease the number of component parts as well as the areas of adhesion and to improve the driving accuracy and efficiency of an objective lens, by winding the tracking coils of the same line diameter around the outer circumference of a focusing coil with two crossing points. CONSTITUTION:A tracking coil 1a is wound directly around the outer circumference of a focusing coil 2, and furthermore another tracking coil 1b is wound around the coil 1a with crossing. An objective lens 9 is welded to the coil 2 as well as to coils 1a and 1b by means of an objective lens holding frames 14a and 14b respectively. Thus a body including the lens 9 to be driven can be vibrated in both focusing and tracking directions by energizing each coil with support springs 7a-7d used as lead wires. In such a way, the number of component parts and the area of adhesion can be decreased and at the same time the lens 9 is driven with high accuracy and high efficiency.

6. 发明专利

JP2002024711A DIGITAL CONTENTS SELLING SYSTEM 失效
公开(公告)号：JP2002024711A
公开(公告)日：2002-01-25
申请号：JP2000212136
申请日：2000-07-13
申请人： HITACHI LTD
发明人： IKUMA AKITOMO , KINOSHITA JUNICHI , OKAYAMA MASAYA , HONDA YOSHINORI
IPC分类号： G06Q30/06 , G06Q50/00 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To provide a commercialized system allowing writing digital contents in a storing medium desired by an orderer. SOLUTION: A drive capable of writing digital contents in a variety of storing media is installed in one or several distribution control systems 3, nut installing on each of the order devices 1 such as a large installed number of kiosk terminals. The order device 1 receives an indication of the digital contents, storing medium, and destination from an orderer, and transmits order information online to the distribution control system 3. The distribution control system 3 receives the ordered information, stores the specified digital contents in the specified storing medium, and distributes offline to the specified destination. Thus, the system allowing writing the digital contents in the storing medium designated by the orderer can be easily realized, and even the digital contents of large capacity such as animation data can be distributed easily.

7. 发明专利

JPH07169075A OBJECTIVE LENS DRIVER 失效
公开(公告)号：JPH07169075A
公开(公告)日：1995-07-04
申请号：JP25344994
申请日：1994-10-19
申请人： HITACHI LTD
发明人： IKUMA AKITOMO
IPC分类号： G02B7/04 , G02B26/10 , G11B7/09
摘要： PURPOSE:To accurately control tracking by driving a holder for an objective lens in a tracking direction without altering its attitude. CONSTITUTION:A barrel 10 which contains an objective lens (not shown) is fixed to a rectangular lens frame 11a, and a square focusing coil 12 having tracking coils 13a-13d at its four corners is mounted in the frame 11a to form a holder. Magnetic circuit members 17a, 17b are provided through the holder, and the coil 12 and the coils 13a-13d are inserted into magnetic fields of the members 17a, 17b. Since the lens is disposed at one end side of the holder, a weight 15 is mounted at an end of the opposite side, and the center of gravity of the holder is made to substantially coincide with the center of a driving force in a tracking direction to the holder by the coils 13a-13d and the members 17a, 17b.

8. 发明专利

JPH0572655B2 失效
公开(公告)号：JPH0572655B2
公开(公告)日：1993-10-12
申请号：JP9445384
申请日：1984-05-14
申请人： HITACHI LTD
发明人： IKUMA AKITOMO , OKUDA TADASHI , IEGI KOICHI , SASAMOTO TOSHIO
IPC分类号： G11B7/09 , H02K41/035

9. 发明专利

JPH0568013B2 失效
公开(公告)号：JPH0568013B2
公开(公告)日：1993-09-28
申请号：JP10582785
申请日：1985-05-20
申请人： HITACHI LTD
发明人： IKUMA AKITOMO , KURODA NAOMITSU , SAEGUSA SHOZO
IPC分类号： G02B26/10 , G02B7/00 , G11B7/09

10. 发明专利

JPS62298973A FEEDING DEVICE FOR OPTICAL TYPE PICKUP 失效
公开(公告)号：JPS62298973A
公开(公告)日：1987-12-26
申请号：JP14014886
申请日：1986-06-18
申请人： HITACHI LTD
发明人： YAMAUCHI YOSHIAKI , SAEGUSA SHOZO , IKUMA AKITOMO
IPC分类号： G11B21/02 , G11B7/085
摘要： PURPOSE:To prevent completely the running-away, collision, etc., of a pickup moving body by constituting so that the screw feeding part of a driving shaft and a feeding clutch can be separated and providing an elastic member between a facing pickup moving body and a device frame when the pickup moving body is close to the device frame over the shifting scope. CONSTITUTION:Guide bars 7a and 7b to guide the shifting of a pickup case 4 are arranged onto a unit plate 8 and has a spring 12 for return between the pickup case 4 and the unit plate 8. Even when the pickup case 4 runs away and is close to the unit plate 8 which is a device frame, a feeding screw 10a of a feeding shaft 10 and the screw feeding part of a clutch 6 are separated, the round bar-shaped part of a shaft edge part 10b of the feeding shaft 10 and the screw feeding part of the clutch 6 run idle, the spring force is loaded to the spring 12 for return during the running-idle condition, and it can be prevented that the pickup case 4 collides with the unit plate 8.

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