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71. 发明专利

JP2003168230A OPTICAL PICKUP ACTUATOR AND OPTICAL DISK DEVICE 审中-公开
公开(公告)号：JP2003168230A
公开(公告)日：2003-06-13
申请号：JP2002208383
申请日：2002-07-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , ASO JUNYA
IPC分类号： G11B7/095
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup actuator and an optical disk device having high linearity in the control characteristics while being super thin, small sized and highly accurate. SOLUTION: The device is provided with: a movable part furnished with an objective lens 24, a cylinder 32 for holding the objective lens, focusing coils 33, 34 and tracking coils 35, 36; a 1st magnetic circuit; a 2nd magnetic circuit; and suspension wires 39 for supporting the movable part. The pair of focusing coils 33, 34 and a pair of focusing magnets 41, 42 are disposed in the 1st magnetic circuit almost symmetrically with respect to the objective lens 24, and the pair of tracking coils 35, 36 and the pair of focusing magnets 41, 42 are disposed in the 2nd magnetic circuit almost symmetrically with respect to the objective lens 24. COPYRIGHT: (C)2003,JPO

72. 发明专利

JP2000166215A LINEAR MOTOR DRIVER AND OPTICAL DISK DEVICE 失效
公开(公告)号：JP2000166215A
公开(公告)日：2000-06-16
申请号：JP33242098
申请日：1998-11-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUSANO TAIZO , HARUGUCHI TAKASHI , TSUNODA TAKESHI
IPC分类号： G11B21/02 , G11B7/085 , H02K41/03 , H02P7/00 , H02P25/06
摘要： PROBLEM TO BE SOLVED: To provide a high-speed and highly accurate linear motor driver, with a small-sized magnetic mechanism and a less drive current, and further to provide an optical disk device which permits small size, low consumption, and high-speed access, by using this linear motor driver. SOLUTION: This linear motor driver is of such constitution as to switch armature coils 104A-104C, using only the stably magnetizing region of a magnet, in the drive of the multipole linear motor comprising a multipole field magnet 101, a plurality of armature coils 104A-104C for generation of thrust, and magnetic sensors corresponding to the armature coils 104A-104C.

73. 发明专利

JPH11316963A OPTICAL PICKUP 失效
公开(公告)号：JPH11316963A
公开(公告)日：1999-11-16
申请号：JP12318898
申请日：1998-05-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , YAMAGUCHI HIDEO
IPC分类号： G11B7/095
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup which has an independent driving means for skew adjustment between an optical disk and an objective lens, can easily make the skew adjustment and perform secure recording and reproduction of an optical disk, and is reducible in thickness. SOLUTION: An actuator part 13 has the driving means for skew adjustment between the optical disk and objective lens 12 and the driving means adjust the tilt of the objective lens 12 to correct deviation in the skew between the optical disk and objective lens 12. Consequently, the optical disk can securely be recorded and reproduced to improve the reliability, and the driving means for the skew adjustment can be made greatly small-sized and thin, thereby making the optical pickup compact.

74. 发明专利

JPH10222862A OPTICAL PICKUP 失效
公开(公告)号：JPH10222862A
公开(公告)日：1998-08-21
申请号：JP2019097
申请日：1997-02-03
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOJIMA KOKI , HARUGUCHI TAKASHI
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pick up capable of recording and reproducing optical disks different in recording density, small in size, thin in thickness and reduced in the power consumption by providing two optical units and one optical system and sharing the system among the units. SOLUTION: Optical units 4 and 8 are arranged at a 90 degree angle with a beam splitter as a starting point. The unit 8 is arranged in the direction which is approximately parallel to the optical axis from a collimating lens 16 to an objective lens 20 and the unit 4 is arranged in the direction which is approximately normal to the optical axis from a wavelength filter 17 to the lens 20. The lens 16 and the unit 4 are arranged so that the location of an optical source 2 becomes the focal distance of the lens 16 in terms of the optical path length in an air medium and an optical source 6 is set closer to the lens 16 than the source 2 in terms of an air length. Thus, the outgoing light beams of the source 2 become parallel light beams after passing a collimating lens 14. The divergence angle of the outgoing light beams of the source 6 is reduced after passing the lens 16.

75. 发明专利

JPH10177739A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JPH10177739A
公开(公告)日：1998-06-30
申请号：JP33535396
申请日：1996-12-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： INOUE MASAOMI , HARUGUCHI TAKASHI
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To make on optical pickup device small sized and thin structive by mounting a superimposing circuit on a recessed part formed in a carriage on the side of mounting an optical unit, covering the superimposing circuit with a metallic plate and fixing an electric supply substrate for an optical unit to this metallic plate. SOLUTION: The carriage 2 is formed with the recessed part 6 on the side of a surface to be arranged with the optical unit, etc., and the superimposing circuit 3 for superimposing a semiconductor laser is arranged in the recessed part 6. The metallic plate 5 consists of a metallic material of stainless steel, copper, brass and iron, etc., for shielding an electromagnetic wave generated from the superimposing circuit 3. The superimposing circuit 3 is held by the plate 5 and the carriage 2 between them, and also parts for supplying electric power and transmitting and receiving a signal are retained by them as well. Since the superimposing circuit 3 is not projected out of the carriage, shielding the superimposing circuit 3 and fixing the electric supply substrate 4 for the optical unit can be performed by one plate 5, thus making the carriage small size and thin structive and light in weight. Consequently, the carriage is movable at high speed, and the optical pickup device is miniaturized.

76. 发明专利

JPH10106021A OPTICAL PICKUP ADJUSTING DEVICE 失效
公开(公告)号：JPH10106021A
公开(公告)日：1998-04-24
申请号：JP25611296
申请日：1996-09-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI
IPC分类号： G11B7/08 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To make a device thin and to improve productivity by forming a skew adjusting mechanism for adjusting the optical axis of an objective lens separately from an optical pickup and moving the same away from the optical pickup after the skew adjustment. SOLUTION: This device comprises an objective lens 4, an objective lens holding cylinder 1 and an actuator having a focus coil 5 for driving the objective lens holding cylinder 1 in two directions and a tracking coil 6. A skew adjusting mechanism for adjusting the optical axis of the objective lens 4 to an optical recording medium is formed separately from an optical pickup, fixed and supported on the optical pickup and moved away from the same after performing skew adjustment. Thus, optical pickup productivity is improved, the number of part items is reduced and accordingly costs are reduced and the device is made thin, reduced in weight and miniaturized.

77. 发明专利

JPH09190636A OPTICAL PICKUP AND ITS SUPPORTING METHOD 失效
公开(公告)号：JPH09190636A
公开(公告)日：1997-07-22
申请号：JP28785396
申请日：1996-10-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , AOYANAGI MUNENORI , SOEEDA YOSHINOBU
IPC分类号： G11B7/09 , G11B7/22
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup and its supporting method capable of being easily assembled without generating vibration. SOLUTION: This optical pickup is arranged so that an objective lens holding cylinder 1 for holding an objective lens 4 for the purpose of converging laser light on an optical disk is supported via wire-like elastic members 21, where the objective lens holding cylinder 1 is supported by curving the plural wire-like elastic members 21 into a bow-shape respectively and disposing outwardly their curved bulge parts to be opposite to each other via the objective lens 4 as the center. Since the wire-like elastic members 21 are curved in advance, distortion stress is immanent in themselves, and since every two wires are curved opposite to each other in the tracking direction, the distortion stress is canceled. Consequently, composite characteristic frequency of vibration of a pitching mode and a yawing mode is eliminated, and hence no resonance takes place.

78. 发明专利

JPH08212692A DRIVING DEVICE FOR OPTICAL DISK 失效
公开(公告)号：JPH08212692A
公开(公告)日：1996-08-20
申请号：JP1944495
申请日：1995-02-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OWAKI HIROHIKO , TERAJIMA YUJI , HARUGUCHI TAKASHI
IPC分类号： G11B19/00 , G11B19/02 , G11B19/247 , G11B19/28
摘要： PURPOSE: To reduce the current consumption of a spindle motor at the time of reproducing information without lowering the access speed. CONSTITUTION: A spindle motor 21 is constituted with a three phase DC brushless motor, a spindle motor control section 22 is provided with a three phase full-wave power source 22a and a three phase half-wave power source 22b, and a driving current is supplied to the spindle motor 21 from the power sources 22a, 22b. A controller 23 outputs a power source switching signal to the spindle motor control section 22, connects the three phase full-wave power source 22a with the spindle motor 21 at the time of access operation, makes the three phase full-wave power source 22 supply a three phase full-wave current, and also connects the three phase half-wave power source 22b with the spindle motor 21 at the time of reproducing information, and makes the three phase half-wave power source 22b supply a three phase half-wave current.

79. 发明专利

JPH07307066A HEAD MOVING DEVICE 失效
公开(公告)号：JPH07307066A
公开(公告)日：1995-11-21
申请号：JP9723494
申请日：1994-05-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TERAJIMA YUJI , HARUGUCHI TAKASHI , OWAKI HIROHIKO , FUKUEDA YOSHINOBU
IPC分类号： G02B6/42 , G11B7/085 , G11B21/02
摘要： PURPOSE:To make a packaging space in the thickness direction of the head moving device thin structive by disposing a flexible wire freely bendably in a space area saved by a subguide shaft formed shortly. CONSTITUTION:When a driving pulse is supplied via the flexible wire 19 to a driving coil unit 15, a main guide shaft 17 is slid by the driving coil unit 15 in the direction of B by a prescribed pitch. Thus, a head unit 14 held by the driving coil unit 15 and a supporting member 16 formed with a single supporting point is moved along the main guide shaft 17 and the subguide shaft 18 from the side of a side frame 13 to the side of a base frame 11, so as to perform tracking on a recording medium (not shown in the figure). At this time, when the head unit 14 is positioned apart from the side of the side frame 13, a large free space surrounded by beam frames 12 and the side frame 13 is secured. The movement of the head unit 14 is followed by the flexible wire 19 keeping a large curvature in this free space, and the wire 19 can neither get over the subguide shaft 18 nor twist itself.

80. 发明专利

JPH0652590A OPTICAL PICKUP 失效
公开(公告)号：JPH0652590A
公开(公告)日：1994-02-25
申请号：JP20481492
申请日：1992-07-31
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , MATSUBA HIROYUKI , FUKUEDA YOSHINOBU
IPC分类号： G11B7/09 , G11B11/10 , G11B11/105
摘要： PURPOSE:To provide a rigid and lightweight optical pickup for optical disk drive, which can be controlled at a high speed. CONSTITUTION:A positional relationship between a movable section having an objective lens holding cylinder 1 for densely controlling, an objective lens 3, a focus coil 6 and a tracking coil 7 and a stationary section having an apparatus base 4, etc., of an optical pickup for an optical disk apparatus is sensed by using waveguides 37, 38 as a photointerrupter 33.

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