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公开(公告)号：JPH10239577A
公开(公告)日：1998-09-11
申请号：JP4446897
申请日：1997-02-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , SUZUKI JUNICHI , UDAGAWA TOSHIKI , YAMAZAKI MICHIKO
Abstract: PROBLEM TO BE SOLVED: To hold a slide mechanism part without exciting it. SOLUTION: A shaft 1 is provided with a groove 1A and a groove 1B perpendicularly to the axial direction. The groove 1A and the groove 1B are formed into a V-shape on the first face 1a and the second face 1b, and the third face 1c and the fourth face 1d, respectively. The angle between the second face 1b and the axial direction of the shaft 1 is made smaller, than the angle between the first face 1a and the axial direction, and the angle between the third face 1c and the axial direction is made smaller than the angle between the fourth face 1d and the axial direction. This slide mechanism part 5 holds a spherical body 2 with a spherical body hold section 4, and it is moved along the shaft 1 while the spherical body 2 is pressed to the shaft 1 by a spring 3. When the spherical body 2 is coupled in the groove 1A or groove 1B, the slide mechanism part 5 is positioned and maintained at its position.
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公开(公告)号：JPH0914990A
公开(公告)日：1997-01-17
申请号：JP18833495
申请日：1995-06-30
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE: To improve the detecting accuracy and AM variation of a magneto- resistance sensor through the waveform of an MR output regardless of the gap length between a magneto-resistance element and a magnet means. CONSTITUTION: A magneto-resistance element 10 is obtained by arranging magnetism sensitive patterns 111A and 211B composed of a plurality of basic magnetism patterns in which the beltlike pattern of the element 10 which is elongated in a direction nearly perpendicular to the arranging direction of the N- and S-poles of a magnet means and has a magnetism sensitive pattern width which is 0.3-1 time as wide as the pole width in the arranging direction of the N- and S-poles at an interval which is (m+1/2) times as long as the pole width in the arranging direction of the magnetic means and connecting the patterns 111A and 211B in series. Then, a DC voltage is applied across both ends of the patterns 111A and 211B and, at the same time, an output is obtained from the connecting point which works as an output terminal 8.
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公开(公告)号：JPH07239437A
公开(公告)日：1995-09-12
申请号：JP5112194
申请日：1994-02-25
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , OSHIMA EIJI , KAWAMURA HIROSHI , ORIMO SHINICHI
Abstract: PURPOSE:To miniaturize a focus lens driving mechanism by eliminating the waste of a space and to obtain sufficient driving force though it is miniaturized by enhancing magnetic efficiency. CONSTITUTION:Notches 11 and 12 extending in parallel to a supporting shaft 5 are respectively formed at the parts of an inside yoke 10 and an outside yoke 8 faced to the shaft 5. The connecting piece 18 of a movable member 4 is made to project to the outside of a yoke frame body through the notches of the yokes 10 and 8. A bearing block 19 is formed at one part of the piece 18 and a shaft guide part 22 is formed at the other tip part. Then, the bearing block 19 is supported by one supporting shaft of a lens barrel 2 and the guide part 22 is engaged with the other supporting shaft so as to be freely slid. Besides, a coil 17 and a coil bobbin 14 are positioned in a magnetic field 13 and a lens and a lens holder 15 are positioned inside the yoke 10.
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公开(公告)号：JPH05328696A
公开(公告)日：1993-12-10
申请号：JP14897092
申请日：1992-05-18
Applicant: SONY CORP
Inventor： ISHII HIROHISA , SAKAMOTO SATOSHI , INOUE RYOKATSU
Abstract: PURPOSE:To smoothly move a moving element and to alleviate power necessary to move the element by operating propulsion forces of a plurality of movable coil type actuators substantially at a center of gravity of the element and a movable element made of a moving member. CONSTITUTION:A moving element 12 is supported movably in a direction parallel to an optical axis of a lens 7 in a state that two positions of opposite side are respectively supported two guide shafts 17, 17' through its center. When driving currents flow to movable coils 31, 31', propulsion forces are applied to the coils 31, 31' in a direction responsive to a direction of the current in a direction along its axial direction, and hence the element 12 is moved forward or rearward together with the movable lens 7 by the propulsion force. Since the forces are operated from a center of gravity of a movable element formed of the element 12 and the lens 7 to two positions spaced at equal distances in opposite directions, a resultant force of the two propulsion forces is applied to a position of the center of gravity.
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公开(公告)号：JPH04233523A
公开(公告)日：1992-08-21
申请号：JP41547190
申请日：1990-12-28
Applicant: SONY CORP
Inventor： ISHII HIROHISA , SAKAMOTO SATOSHI , NAKAZATO KUNIO
Abstract: PURPOSE:To constitute a means for driving a stop blade of small number of parts in an iris adjusting mechanism, to compactly arrange the mechanism around a photographing lens and to obtain the mechanism in which an operating sound is hardly generated. CONSTITUTION:This mechanism is provided with an orthogonal transformation mechanism 76 in which a voice coil type actuator 82 is taken as a driving source, and which movably supports an iris driving body 77 being the moving body of the actuator on a guiding shaft 28 arranged in parallel with the optical axes of the photographing lenses 19, 20, 21, 22 and 23 and converts the movement of the driving body 77 in a direction parallel with the optical axes to the movement in a direction orthogonal to the optical axes, that means, in a direction parallel with the moving direction of the stop blades 51 and 52. By moving the iris driving body 77, the blades 51 and 52 are moved in the direction orthogonal to the optical axes so as to adjust a stop quantity.
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Patent Agency Ranking
公开(公告)号：JPH0444504B2
公开(公告)日：1992-07-21
申请号：JP12207281
申请日：1981-08-04
Applicant: SONY CORP
Inventor： UZUKA MITSUO , SAKAMOTO SATOSHI , ITO SEIJI
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公开(公告)号：JPH02101949A
公开(公告)日：1990-04-13
申请号：JP25312088
申请日：1988-10-07
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , YAMAZAKI SHIGEKI , MARUYAMA TAKAO
IPC: H02K15/03
Abstract: PURPOSE:To obtain high torque and a low torque ripple by magnetizing a magnetic pole in a part opposed to a magnetism sensing element of a magnet so that the strength of the magnetism decreases in waves from the center to the edge of the adjacent poles. CONSTITUTION:The generated torque of a motor is a product of interlinkage magnetic flux of a coil 2 and its drive current. While a torque ripple largely depends on the waveform of the drive current. Then the interlinkage magnetic flux in the coil from a magnet 1 is formed in a trapezoidal waveform to enlarge a period showing the maximum value, so that the interlinkage magnetic flux of the coil and the torque are increased. By forming magnetic flux received by a magnetism sensing element 3 into a sinusoidal wave, the drive current of the coil 2 is of a sinusoidal wave, and the rises and falls are made gentle, reducing the torque ripple.
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公开(公告)号：JPS63268461A
公开(公告)日：1988-11-07
申请号：JP10403887
申请日：1987-04-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To miniaturize a motor device, and to improve performance thereof by bending one conductor and using the bent section as a detecting section detecting the timing of revolution. CONSTITUTION:Printed coils 4a1-4c2 are employed as driving coils for a stator 4, arranged where surface-opposed to a rotor magnet and connected to terminals 10a-10d for a driving terminal section. The timing of driving currents flowed through the coils 4a1-4c2 is servo-controlled, thus controlling the revolution of a rotor. A frequency detecting signal for the revolution of the rotor is detected from voltage induced in the coils 4a1-4c2 when the rotor magnet is rotated. Consequently, a conductor for shaping a terminal section 9 is used, bent to an approximately U-shape and a bending section 13 is shaped, and molded surface-opposed to a magnet for PG, thus forming a terminal block. The bending section 13 is employed as a detecting section, and a PG output is extracted from output terminals 9a-9b for the bending section 13.
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公开(公告)号：JPS62285654A
公开(公告)日：1987-12-11
申请号：JP12839586
申请日：1986-06-03
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
IPC: H02K29/00
Abstract: PURPOSE:To reduce a spiky torque ripple by mounting commutating poles having polarity reverse to main poles on both sides of the boundary of the different main poles in the detection region of a position detecting element for a rotor magnet. CONSTITUTION:Commutating poles 12N, 12S for removing a spiky torque ripple are fitted to the detection regions such as outer edge sections, to which a position detecting sensor for a rotor magnet 2 is faced oppositely, in the position detecting sensor in the rotor magnet 2. The commutating poles 12N, 12S are set up at polarity reverse to main poles 5N, 5S, and mounted at a position that separates only by an electrical angle of /pi4 from the boundaries of the main poles 5N, 5S.
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公开(公告)号：JPS6281992A
公开(公告)日：1987-04-15
申请号：JP21892085
申请日：1985-10-01
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To reduce the vibrations and noises of a motor, and to obtain stable torque by weakening a drive signal by a CR time constant circuit while bringing the phase of the detection of the position of a rotor to the phase of lead in response to the quantity of delay of the CR time constant circuit. CONSTITUTION:A drive circuit for a brushless motor is provided with a CR time constant circuit consisting of a capacitor C1 and a resistor R1, which makes the waveform of a rotational-position detecting signal from a rotor gentle and forms a switching drive signal. Consequently, the vibratory noises and electromagnetic noises of the motor are reduced. The detecting point of a rotational-position detecting signal by a rotor-position detecting section is set to the phase of lead in response to the signal delay time by the CR time constant circuit. Accordingly, displacement from an ideal switching point of driving currents is compensated, thus compensating the steep lowering of torque.
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