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公开(公告)号：JPS61295851A
公开(公告)日：1986-12-26
申请号：JP13755785
申请日：1985-06-24
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
IPC: H02K29/00
Abstract: PURPOSE:To eliminate a torque ripple and to enhance the efficiency of a two- phase brushless motor by providing a demagnetizing interpole at the position of the specific angle from a pole inverting boundary of a main pole in a field formed with a portion which does not substantially generate a torque between main poles. CONSTITUTION:A 2-phase brushless motor is formed by opposing a rotor magnet having a field provided with an electroless pole 2 which does not effectively generate or weakens a torque along a rotating direction between main pole pairs N, S and a stator having an armature displaced at 180 deg. at the interval of two sides which contributes to the torque generation of 2-phase coil. In this case, an interpole 5 for demagnetizing a pole effective to generate a torque is provided at a position of approx. 90 deg. (gamma=90+ or -10 deg.) from the pole inverting boundary K of main pole pair. Thus, the reduction of the absolute torque is minimized to effectively reduce the torque ripple.
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公开(公告)号：JPS61247262A
公开(公告)日：1986-11-04
申请号：JP8929285
申请日：1985-04-25
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , SAOTOME TOSHIO , INOUE RYOKATSU , WATANABE TOSHIYUKI
IPC: H02K29/08
Abstract: PURPOSE:To eliminate disturbance due to leakage flux, by putting together the main magnetic poles of a rotor magnet and a detecting magnetized section, and by evening the magnetic flux quantities in N, S. CONSTITUTION:Inside the main magnetic poles 8 of eight poles, the detecting magnetized section 9 of a pair of equal areas in N, S is formed. The magnetized section 9 consists of the right half S pole 9a and the left half N pole 9b. The areas of the N, S poles of a magnet 3 including the main magnetic poles 8 are equal to each other as a whole, and leakage flux due to the unequal areas is reduced.
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公开(公告)号：JPS61189161A
公开(公告)日：1986-08-22
申请号：JP2950385
申请日：1985-02-18
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To improve a torque ripple by providing an auxiliary pole having a reverse polarity to the main pole at the position of approx. + or -45 deg. of an electric angle from a boundary of detecting main poles near the opposing portions of a magneto-electric converter of a rotor. CONSTITUTION:A rotor 2 of a 3-phase brushless motor is produced by alternately magnetizing, for example, 8 N-poles and S-poles at a disc of a magnetic material as main poles 2a. Auxiliary poles 2b having reverse polarity to the pole 2a are magnetized at the positions of approx. + or -45 deg. of an electric angle from a boundary of the N-poles and S-poles of the outer periphery of the pole 2a. The poles 2b pass over a magneto-electric converter of a stator to decide a drive current by the composite signal of the converter to rotatably drive a motor. Thus, when the rotor 2 is rotated, the output signal waveforms of the converter is not saturated but becomes an abrupt waveform.
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公开(公告)号：JPS6188755A
公开(公告)日：1986-05-07
申请号：JP20934984
申请日：1984-10-05
Applicant: Sony Corp
Inventor： SAKAMOTO SATOSHI
IPC: H02K29/00
CPC classification number: H02K29/03
Abstract: PURPOSE:To reduce the torque ripple of a brushless motor, by providing auxiliary poles changing the magnetized wave of a rotor magnet partly. CONSTITUTION:So far as a three phase brushless motor is concerned, three phase coils are arranged at an interval of an electrical angle 120 deg. multiplied by an integral number, and a rotor magnet M is magnetized in eight poles for example, and main poles 1S, 1N are organized so that they may alternately confront the torque action side in the radial direction of each coil. The respective coils are electrically conducted by switch elements every 120 deg. or every 180 deg. in succession. Then, on the center of the flux width in the rotary direction of the main poles 1S, 1N of the rotor magnet M (at any position of 30 deg., 90 deg., or 150 deg. off the range of the main poles), auxiliary poles 3N, 3S for reducing the effective flux of the main poles 1S, 1N partly are provided. Then, the peak position (90 deg. and 270 deg.) for flux distribution of sine wave form is greatly concaved, and the synthesized torque ripple can be greatly reduced.
Abstract translation: 目的：为了减少无刷电机的转矩脉动，通过提供辅助极部分地改变转子磁体的磁化波。 构成：就三相无刷电动机而言，三相线圈以电角度120度的间隔排列。 乘以整数，并且转子磁体M例如被磁化为八极，并且组合主极1S，1N，使得它们可以交替地面对每个线圈的径向方向上的扭矩作用侧。 相应的线圈每120度由开关元件电导电。 或每180度。 陆续。 然后，在转子磁体M的主极1S，1N的旋转方向的磁通宽度的中心（在30度，90度，或者主极的范围内的150度的任意位置） 提供用于部分地降低主极1S，1N的有效通量的辅助极3N，3S。 那么，正弦波形磁通分布的峰值位置（90度和270度）大大减小，可以大大减少合成转矩脉动。
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公开(公告)号：JP2009295279A
公开(公告)日：2009-12-17
申请号：JP2009219329
申请日：2009-09-24
Inventor： KUBO TAKESHI , UEDA MITSUNORI , SUZUKI JUNICHI , SAKAMOTO SATOSHI , KAWAMURA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a high recording density and a large capacity of an optical disk by reducing occurrence quantity of spherical aberration by increasing the numerical apertures NA of objective lenses loaded on an optical head. SOLUTION: An actuator 14 for collimator lens is provided in an optical head 1 used when recording/reproducing are performed for an optical disk 2 on which a light transmitting layer 4 is formed on a recording layer. Then, a collimator lens 13 arranged between a light source 10 and an object lens 16 is moved by this actuator 14 for collimator lens 13 so that spherical aberration caused by a thickness error of the light transmitting layer 4 is canceled, and that spherical aberration caused by thickness error of the light transmitting layer is canceled. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：通过增加装载在光学头上的物镜的数值孔径NA，通过减小球面像差的发生量来提供高记录密度和大容量的光盘。 解决方案：在对记录层上形成有透光层4的光盘2执行记录/再现时使用的光学头1中设置准直透镜致动器14。 然后，布置在光源10和物镜16之间的准直透镜13由准直透镜13的致动器14移动，使得由透光层4的厚度误差引起的球面像差被消除，并且产生球面像差 透光层的厚度误差被消除。 版权所有（C）2010，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2002334457A
公开(公告)日：2002-11-22
申请号：JP2001139803
申请日：2001-05-10
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , KUBO TAKESHI
IPC: G11B7/09
Abstract: PROBLEM TO BE SOLVED: To stably hold a movable part at a neutral position on a fixed part regardless of a temperature and the secular change. SOLUTION: The unit is provided with a dual shaft actuator 8 which is arranged on a moving base 7 and has a movable part 11 which moves in a focusing direction and a tracking direction based on the fixed part 10, a photosensor 16 which has a light emitting element 17 from which detection light is emitted, and a pair of light receiving elements 18 which receive the detection light emitted from the light emitting element and are located apart from each other in the tracking direction, and the unit is also provided with a shutter 15 which is provided on the dual axis actuator and has a shielding part 15b which shields the detection light emitted from the light emitting element of the photosensor, thus a transmission hole 15a is formed on the shutter in a way that the detection light emitted from the light emitting element of the photosensor passes and the width between both edges in the tracking direction of the hole is approximately the same as the distance between the pair of light receiving elements.
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公开(公告)号：JPH10241201A
公开(公告)日：1998-09-11
申请号：JP4447297
申请日：1997-02-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , SUZUKI JUNICHI , UDAGAWA TOSHIKI , YAMAZAKI MICHIKO
Abstract: PROBLEM TO BE SOLVED: To enable aberration compensations at the time of reading out information from plural kinds of recording medium whose thickness of optically transparent layers are different by moving operate a compensating element for compensating the spherical surface of an objective lens to be provided at an entrance pupil side with respect to the objective lens over the inside and the outside of an optical path with a linearly driving mechanism. SOLUTION: A linearly driving coil 12 is provided in a slide mechanism to generate a driving force in a linear direction by being combined with a magnetic flux to be generated from a linearly driving magnet and moves a corrected lens holder provided with a corrected lens 14. The corrected lens 14 is supported in a lens holder and is a lens compensating the aberration due to the kind of an optical recording medium 101 and is moved in the linear direction with the slide mechanism as necessary to be inserted into an optical path being directly under and objective lens 38. The lens holder is of the flate rectangular parallelepiped plate shape integrally formed in the slide mechanism part and is provided with the corrected lens 14 and the center of the principal plane.
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公开(公告)号：JPH08248291A
公开(公告)日：1996-09-27
申请号：JP7825895
申请日：1995-03-09
Applicant: SONY CORP
Inventor： OSHIMA EIJI , SAKAMOTO SATOSHI , KAWAMURA HIROSHI
Abstract: PURPOSE: To make the moving range of a movable lens such as a zoom lens or a focusing lens wider relative to dimension in an optical axis direction. CONSTITUTION: This lens barrel 1 is equipped with optical parts 2 fixed in a movable lens barrel 8 out of the lens barrel 1, the zoom lens 3 slidably supported in the lens barrel 1 so as to separate from/contact with the optical parts 2, and linear motors 31, 32, 33 and 34 for moving the zoom lens 3. The motors 31 to 34 moving the zoom lens 3 are positioned outside the optical parts 2 in the case they are viewed from an optical axis direction, and the coil 31 of the motor is attached to the lens holder 30 of the zoom lens 3 and protruded toward the optical parts 2 side from the zoom lens 3 in the optical axis direction.
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公开(公告)号：JPH085892A
公开(公告)日：1996-01-12
申请号：JP16317294
申请日：1994-06-21
Applicant: SONY CORP
Inventor： MORO SHUJI , SAKAMOTO SATOSHI , ORIMO SHINICHI
Abstract: PURPOSE:To provide a lens barrel device capable of simplifying outside shape without positioning a guide means such as a guide shaft on the outside. CONSTITUTION:This device is provided with a lens barrel 20, a lens 2 arranged in the lens barrel, a holding means 5 holding the lens 2 and provided with a coil 35, a yoke arranged in the lens barrel 20 corresponding to the periphery of the holding means 5, a magnet arranged in the yoke in order to move the holding means 5 in the lens barrel 20 and constituting a linear actuator by energizing the coil 35, and the guiding means 14a and 14b for guiding the means 5 holding the lens 2 along the lens barrel 20 in the case of driving the linear actuator; and the guiding means 14a and 14b are arranged near the yoke and the magnet.
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公开(公告)号：JPH07244234A
公开(公告)日：1995-09-19
申请号：JP5984694
申请日：1994-03-07
Applicant: SONY CORP
Inventor： OSHIMA EIJI , SAKAMOTO SATOSHI , KAWAMURA HIROSHI , ORIMO SHINICHI
Abstract: PURPOSE:To make the structure simple, to make the assembling work easy and to reduce the cost. CONSTITUTION:Notches 11, 11, 12 and 12 extending parallel with supporting shafts 5 are respectively formed at the parts of an inside yoke 10 and an outside yoke 8 opposed to the supporting shafts 5, and the coupling pieces 18 and 18 of a movable member 4 are projected to the outside of a yoke frame body 6 through the notches 11, 11, 12 and 12 of the yokes 10 and 8, and a bearing block 19 and a shaft guide part 22 are formed at one tip part and the other tip part of the coupling piece 18, respectively. The bearing block 19 is supported to be freely slidably by one supporting shaft 5 of a lens barrel and the shaft guide part 22 is engaged freely slidably with the other supporting shaft 5. tapless coil 15 and a coil bobbin 14 are positioned in magnetic field, and a lens 17 and a lens holder 16 are positioned inside the yoke 10.
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