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公开(公告)号：CA2043161C
公开(公告)日：2000-08-29
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：CA1273047A
公开(公告)日：1990-08-21
申请号：CA530332
申请日：1987-02-23
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: A two-phase brushless motor has a rotor comprising at least a pair of first magnetic poles and a pair of second magnetic poles which are smaller in width than the first magnetic poles, and a stator comprising at least a pair of first coils and a pair of second coils 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 and the two phases produced by the two pairs of coils differ from each other.
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公开(公告)号：HK1007644A1
公开(公告)日：1999-04-16
申请号：HK98106788
申请日：1998-06-25
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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公开(公告)号：DE69117435T2
公开(公告)日：1996-10-24
申请号：DE69117435
申请日：1991-10-31
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: An apparatus for detecting an initial position of a movable lens (8) in a lens barrel in which a lens holder (9) retaining the lens (8) is reciprocally movable parallel to an optical axis (C) of the lens. The apparatus includes magnet means (11) which has north and south polarities (11a,11b) and is alternatively secured to either an outer periphery of the lens holder (9) or an inner periphery of the lens barrel. Magnet flux detecting means (12) is also secured to whichever of the outer periphery of the lens holder (9) or the inner periphery of the lens barrel to which the magnet means (11) is not secured, such that the detecting means (12) faces a boundary (11c) between the polarities (11a,11b) of the magnet means (11). The detecting means (12) detects magnetic flux density of the magnet means (11) and outputs a voltage based on the detected magnetic flux density. The initial position of the lens (8) is determined as a point where the output voltage indicates zero or approximately zero.
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公开(公告)号：AT140337T
公开(公告)日：1996-07-15
申请号：AT91108265
申请日：1991-05-22
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
IPC: H02K33/18 , G11B21/10 , H01F7/06 , H02K41/035
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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Patent Agency Ranking
公开(公告)号：DE69117435D1
公开(公告)日：1996-04-04
申请号：DE69117435
申请日：1991-10-31
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: An apparatus for detecting an initial position of a movable lens (8) in a lens barrel in which a lens holder (9) retaining the lens (8) is reciprocally movable parallel to an optical axis (C) of the lens. The apparatus includes magnet means (11) which has north and south polarities (11a,11b) and is alternatively secured to either an outer periphery of the lens holder (9) or an inner periphery of the lens barrel. Magnet flux detecting means (12) is also secured to whichever of the outer periphery of the lens holder (9) or the inner periphery of the lens barrel to which the magnet means (11) is not secured, such that the detecting means (12) faces a boundary (11c) between the polarities (11a,11b) of the magnet means (11). The detecting means (12) detects magnetic flux density of the magnet means (11) and outputs a voltage based on the detected magnetic flux density. The initial position of the lens (8) is determined as a point where the output voltage indicates zero or approximately zero.
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公开(公告)号：DE69112011D1
公开(公告)日：1995-09-14
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：AU7724391A
公开(公告)日：1991-11-28
申请号：AU7724391
申请日：1991-05-21
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
IPC: H02K33/18 , G11B21/10 , H01F7/06 , H02K41/035 , H04R9/00 , H04R9/02 , H01H50/20 , H01H50/44 , G03B3/10
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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9.发明专利
公开(公告)号：SG55154A1
公开(公告)日：1998-12-21
申请号：SG1996008212
申请日：1991-10-31
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: An apparatus for detecting an initial position of a movable lens (8) in a lens barrel in which a lens holder (9) retaining the lens (8) is reciprocally movable parallel to an optical axis (C) of the lens. The apparatus includes magnet means (11) which has north and south polarities (11a,11b) and is alternatively secured to either an outer periphery of the lens holder (9) or an inner periphery of the lens barrel. Magnet flux detecting means (12) is also secured to whichever of the outer periphery of the lens holder (9) or the inner periphery of the lens barrel to which the magnet means (11) is not secured, such that the detecting means (12) faces a boundary (11c) between the polarities (11a,11b) of the magnet means (11). The detecting means (12) detects magnetic flux density of the magnet means (11) and outputs a voltage based on the detected magnetic flux density. The initial position of the lens (8) is determined as a point where the output voltage indicates zero or approximately zero.
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公开(公告)号：DE69118243T2
公开(公告)日：1996-08-22
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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