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公开(公告)号：DE69118243D1
公开(公告)日：1996-05-02
申请号：DE69118243
申请日：1991-05-21
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A lens barrel for a camera wherein an outer profile thereof has a reduced dimension in a radial direction of a movable lens (11) and with a lens holding member (12) that can be moved smoothly in a direction of an optical axis of the movable lens (11) held on the barrel. The lens barrel (3) comprises an outer shell (4) having a pair of guide portions (23) provided therein and a lens holding member (12) holding a movable lens (11) thereon. The lens holding member (12) has a pair of guide portions (34) provided at the opposite locations thereof with respect to the optical axis and is supported at the guide portions (34) thereof for sliding movement on the guide portions (23) of the outer shell (4). The lens barrel (3) further comprises an actuator (15) including a coil (13) securely mounted on the lens holding member (12) and a magnet (14) securely mounted on the outer shell (4). The coil (13) and magnet (14) are disposed coaxially to each other around the optical axis. Position detecting means (36) is disposed in a spaced relationship by substantially equal distances from the guide portions (34) of the lens holding member (12) and detects a position of the lens holding member (12) with respect to the outer shell (4).
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公开(公告)号：DE69112011T2
公开(公告)日：1996-02-22
申请号：DE69112011
申请日：1991-12-26
Applicant: SONY CORP
Inventor： NAKAYAMA AKIHITO , SAKAMOTO SATOSHI
Abstract: A magnetoresistive position detecting device according to the present invention comprises a magnet (15) having magnetic poles (N,S) alternately magnetized at predetermined intervals, a magnetoresistive element having magneto-detectors (A1,A2) for a plurality of phases successively disposed a predetermined distance apart, with a pair of the magneto-detectors (A1,A2) provided for each phase, the pair of magneto-detectors (A1,A2) for each phase changing their resistance values in response to the magnetic field of the magnet (15), disposed half the formed magnetic pole width (N,S) in substance, apart, and applied with voltage at both ends (b,Vcc) of a series connection thereof so as to output a signal from the middle point (AO) of the connection, and a signal processing circuit for detecting a change in relative position between the magnetoresistive element and magnet (15) on the basis of a signal obtained from the outputs of the pairs of magneto-detectors (A1,A2) for the respective phases of the magnetoresistive element, and is thereby made capable of position detection of high resolution and accuracy.
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公开(公告)号：DE69111344T2
公开(公告)日：1996-01-18
申请号：DE69111344
申请日：1991-09-10
Applicant: SONY CORP
Inventor： INOUE NORIKATSU , SAKAMOTO SATOSHI
Abstract: The lens barrel apparatus comprises an outer shell (3), lens holding member (33, 25, 40) holding a focusing lens (10) thereon, the latter being contained within the outer shell for movement in a direction of an optic axis of the focusing lens, and an actuator (32) including an actuating coil (35) secured to one of the lens holding member (25) and the outer shell and wound around a coil core (31). The actuator further includes a magnet secured to the other of the lens holding member (33) and the outer shell in a coaxial relationship with the actuating coil (35) around the optic axis. According to the invention, a detecting coil (37) is wound on the coil core in an overlapping relationship with the actuating coil (35) for detecting a speed of movement of the focusing lens. This arrangement whereby the speed detection coil and the actuating are superimposed on a common core economises on the number of parts required, as well as on weight and cost.
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公开(公告)号：HK1007626A1
公开(公告)日：1999-04-16
申请号：HK98106807
申请日：1998-06-25
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A voice coil type actuator wherein the length in an axial direction and the number of parts is reduced without deteriorating a required function and the magnetic flux density in a space in which a movable coil (11) is located is substantially uniform over the entire length in an axial direction. The voice coil type actuator comprises a fixed guide shaft (14) having a radial portion made of a permeable material and a movable body supported for axial sliding movement on the guide shaft. The movable coil (11) is supported coaxially with the guide shaft (14) on the movable body (13). A yoke (17) having a substantially cylindrical profile is disposed in such a manner as to surround a range of movement of the movable coil (11), and a pair of fixed magnets (18,18') are disposed in contact with the guide shaft (14) and the yoke (17) and magnetized with the opposite polarities in a radial direction. The yoke (17) has a recess (17a) formed therein in the axial direction of the yoke, and a movable member to be moved by the actuator is supported at a portion of the movable body (13) which extends laterally through the recess in the yoke.
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公开(公告)号：DE69103217T2
公开(公告)日：1995-02-02
申请号：DE69103217
申请日：1991-05-28
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A voice coil type actuator comprising a guide shaft (14) formed of a material having at least a portion which is permeable in the radial direction in cross-section, a movable member (13) slidably supported on the guide shaft (14), a movable coil (27) supported on the guide shaft (14) on the movable member (13), a generally tubular yoke (17) surrounding the movable coil (27) and covering the range of the movement thereof, and a magnetic field generating magnet (20) being in contact with the yoke (17). An axially extending cutout (18a) is formed in the yoke (17). A portion of the movable member (13) projects through the cutout (18a) and supports thereon a displaceable member.
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Patent Agency Ranking
公开(公告)号：DE3785777T2
公开(公告)日：1993-08-12
申请号：DE3785777
申请日：1987-02-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A two-phase brushless motor has a rotor comprising at least a pair of first magnetic poles (4 s , 4 N ) and a pair of second magnetic poles (5 S , 5 N ) which are smaller in width than the first magnetic poles (4 S , 4 N ), and a stator comprising at least a pair of first coils (I A1 , I A2 ) and a pair of second coils (I B1 , I B2 ) for producing a first phase and a second phase of varying magnetic fields, respectively, so that the torques respectively obtained from the interaction of the two pairs of magnetic poles (4 S , 4 N , 5 s , 5 N ) and the two phases produced by the two pairs of coils - (I A1 , I A2 , I B1 , I B2 ) differ from each other.
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公开(公告)号：CA2043161A1
公开(公告)日：1991-11-26
申请号：CA2043161
申请日：1991-05-23
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
IPC: H02K33/18 , G11B21/10 , H01F7/06 , H02K41/035 , H02K41/02
Abstract: A voice coil type actuator wherein the length in an axial direction and the number of parts is reduced without deteriorating a required function and the magnetic flux density in a space in which a movable coil is located is substantially uniform over the entire length in an axial direction. The voice coil type actuator comprises a fixed guide shaft having a radial portion made of a permeable material and a movable body supported for axial sliding movement on the guide shaft. The movable coil is supported coaxially with the guide shaft on the movable body. A yoke having a substantially cylindrical profile is disposed in such a manner as to surround a range of movement of the movable coil, and a pair of fixed magnets are disposed in contact with the guide shaft and the yoke and magnetized with the opposite polarities in a radial direction. The yoke has a recess formed therein in the axial direction of the yoke, and a movable member to be moved by the actuator is supported at a portion of the movable body which extends laterally through the recess in the yoke.
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公开(公告)号：CA1256152A
公开(公告)日：1989-06-20
申请号：CA502020
申请日：1986-02-17
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A three-phase brushless motor in which two electromagnetic transducer elements for detecting the rotational position of a rotor are disposed so as to produce a composite signal having a phase difference of 120.degree. relative to the output signals from the electromagnetic transducer elements, and the output signals from the two electromagnetic transducer elements and the composite signal are used to determine drive currents fed to the stator coils. The rotor includes auxiliary magnetic poles having opposite polarities to those of main magnetic poles and are disposed in the rotor opposite the electromagnetic transducer elements at positions with an electrical angle of ?45.degree. from the boundary between respective North poles and South poles of the main magnetic poles, whereby waveforms of the composite signal and the output signals from the electromagnetic transducer elements have a steep slope at zero crossing points.
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公开(公告)号：CA2120171C
公开(公告)日：2002-12-31
申请号：CA2120171
申请日：1994-03-29
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , ORIMO SHINICHI
IPC: G02B7/10 , H02K41/035 , H02K41/02 , G03B3/10
Abstract: A linear electromagnetic driving apparatus includes a substantially rectangular tube-shaped magnetic yoke comprised of outer and inner frame plates spaced apart to form a gap with at least one magnet secured to an outer or inner frame plate to generate magnetic flux. A bobbin supporting a coil which extends in a direction parallel to the longitudinal axis of the magnetic yoke is positioned in the gap. A driven member is secured to and coaxial with the bobbin and has openings to receive the inner frame plates of the yoke such that when the coil is energized to move the bobbin in the gap, the inner frame plates extend into and through the bobbin and into and through the openings of the driven member. A fixed shaft extends parallel to the longitudinal axis of the yoke; and a bearing secured to the bobbin structure and extending outwardly therefrom receives and is slidable on the fixed shaft. At least one of the corners formed on the rectangular tube-shaped yoke is cut out to define an open portion through which the bearing passes so as to be unobstructed as the bobbin slides within the yoke.
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公开(公告)号：HK1007802A1
公开(公告)日：1999-04-23
申请号：HK98107013
申请日：1998-06-26
Applicant: SONY CORP
Inventor： INOUE NORIKATSU , SAKAMOTO SATOSHI
Abstract: The lens barrel apparatus comprises an outer shell (3), lens holding member (33, 25, 40) holding a focusing lens (10) thereon, the latter being contained within the outer shell for movement in a direction of an optic axis of the focusing lens, and an actuator (32) including an actuating coil (35) secured to one of the lens holding member (25) and the outer shell and wound around a coil core (31). The actuator further includes a magnet secured to the other of the lens holding member (33) and the outer shell in a coaxial relationship with the actuating coil (35) around the optic axis. According to the invention, a detecting coil (37) is wound on the coil core in an overlapping relationship with the actuating coil (35) for detecting a speed of movement of the focusing lens. This arrangement whereby the speed detection coil and the actuating are superimposed on a common core economises on the number of parts required, as well as on weight and cost.
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