• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an electro-optical device, comprising a frame (1), a movable holder (5) in which an objective (7) having an optical axis (9) is secured, bearing means (25, 27, 29, 31) for supporting the holder so that it can be translated and rotated, a magnet (13) which is secured to the frame and cylindrical wall portions (1B) which wall portions with the magnet form an annular air gap (17) with a radial magnetic field, a focussing coil (19) which is secured to the holder and which is movable in the air gap, and a plurality of tracking coils (33) which are secured to the holder and which are situated on the outer side of the focussing coil. The tracking coils extend through recesses (37) between the cylindrical wall portions of the frame, the turns of the tracking coils being situated in or substantially in radial planes containing the axis of rotation (11) of the holder and the turns of each of the tracking coils together forming a continuous free space (35). Bridge members (39) of a soft-magnetic material extend through the free spaces and are magnetically linked and mechanically connected to the cylindrical wall portions on both sides of the tracking coils.
    公开号:SU1687036A3
    申请号:SU874203463
    申请日:1987-10-09
    公开日:1991-10-23
    发明作者:Нестор Йозеф Ван Слуис Роберт；Матеус Антониус Мария Алденховен Гисланус
    申请人:Н.В.Филипс Глоэлампенфабрикен (Фирма)；
    IPC主号:
    专利说明:

    The design of the device frame 1 with cylindrical parts of the walls 2 and the fixing unit consisting of a boss 31 and stops 32, 33 are made in the form of a single unit. In the holes 21 of the tracking coils 20, bridged connecting elements 25 are provided in the form of strips of magnetically soft material. The elements 25 are rigidly fixed on the mounting surfaces 24 of the wall 2, and the magnetic elements are made in the form of a disk-shaped or cylindrical axially magnetized permanent magnet 7 and the disk-shaped element 8 of a ferromagnetic material. When a tracking signal 20 is sent to the windings of the tracking coils 20, and the focusing signal 11 of the defocusing signal 11, the lens 5 mounted on the holder 4 turns around the pin 16 and moves along this pin to work on tracking and focusing errors. 2 h. n. f-ly, 3 ill.
    The invention relates to the accumulation of information using optical means, in particular, devices for autofocusing and tracking the information track of optical disk information carriers, and can be used in a sound and video recording / reproducing apparatus.
    The purpose of the invention is to simplify the design of the device.
    FIG. 1 shows the proposed device in a disassembled read; in fig. 2 - the same, assembled, section; in fig. 3 - the same, top view.
    The device comprises a frame 1 (Fig. 1) of a magnetically soft material with cylindrical parts of the walls 2 and mounting holes 3, a holder 4 with a lens 5 and a diaphragm 6 (Fig. 2), a cylindrical permanent magnet 7, a disk-shaped element 8 made of ferromagnetic material and the PMO formed by the plate 9 of the frame 1 and the cylindrical parts of the walls 2. Between the permanent magnet 7 and the disk-shaped element 8 on the one hand and parts of the walls 2 on the other hand, an annular air gap 10 is formed in which a magnetic field is formed and acts radia noy orientation. The device also contains a focusing coil 11 mounted in a holder 4, the axis of which coincides with the axis of rotation 12 of the holder, a sleeve 13 which is attached to the holder 4 by means of an adhesive substance, the coils 11 being electrically connected to the terminals of the printed circuit board 14, and the focusing coil 11 with the sleeve 13 and the cylindrical part 15 of the holder 4 can move freely to the limits of the air gap 10. The device has support elements — pin 16, support inserts 17 and 18, which are fixed respectively in plate 9 of frame 1 and in disco braznom member 8 by the elastic
    the locking elements 19. The pin 16 can slide and rotate in the bearing pads 17 and 18.
    Radial Tracking Drive
    From two rectangular tracking coils 20 with holes 21 that are attached at diametrically opposite points to the outer side of the cylindrical part 15 of the holder 4, the drives of the tracking coils are connected to the terminals of the printed circuit board 14, the contacts 22 of which are connected to the focusing and tracking systems information recording / reproduction apparatus (not shown). Between the two cylindrical parts of the walls 2 are formed notches 23, into which the radial tracking coils 20 enter, and on opposite sides of the notches 23, mounting surfaces 24 are formed, on which bridged connecting elements 25 of magnetically soft material, in the form of strips, are installed, with holes The 21 coils 20 of radial tracking encompass the bridge connecting elements 25.
    To reduce the distance between the optical axis of the lens 5 and the axis of rotation 12, grooves 26 and 27 are made in the cylindrical parts of the walls 2, and in the notch
    27, a printed circuit board 14 is installed, which also functions as a counterweight to the holder 4,
    To determine and measure the radial position of the lens 5 during operation.
    The device comprises a detector 28 and a mirror 29, which are optically coupled to each other. The detector can consist of a printed circuit board, an LED and a lens (not shown), it is attached to frame 1 by means of a leaf spring 30 fixed to the boss 31 of frame 1 (Fig. 1), and the detector is mounted between two stops 32 and 33, fastened to the frame 1. The mirror 29 is fixed on the holder 4 with the help of the frame 34.
    The device works as follows.
    When a defocus signal produced by the recording / reproducing apparatus focusing system is fed to the inputs of the printed circuit board 14, a control signal is supplied to the turns of the focusing coil 11, according to which the holder 4 and rigidly connected with the required direction and it has a focusing lens 5. The lens is moved along its optical axis, while the guiding element of the design is the pin 16, the axis of which is parallel to the optical axis of the lens 5. For maximum effect The drive actuators for focusing bridge elements 25 are located in the holes 21 of the coils 20 of radial tracking, whereby the annular air gap 10 together with the radial magnetic field evenly covers the axis of rotation.
    When the radial tracking signal produced by the tracking system of the information track of the information recording / reproducing apparatus is fed to the inputs of the printed circuit board 14, a control signal is applied to the turns of the tracking coils 20, according to which the holder 4 of the lens 5 is rotated in the required direction, turning the latter around the pin 16, fastened with its ends through the jets 17 and 18 in the frame 1 and the holder 4. The tracking coils are mounted in the recesses 26 and 27 of the walls 2 of the frame 1. In the left coil holes Neither bridged connecting elements 25 mounted on the mounting surfaces 24 are mounted. Strip-shaped elements 25 ensure that the active parts of the tracking coils 20 are located in a radial magnetic field. After excitation of the tracking coils 20 by an electric field, tangentially directed resulting magnetic forces are generated, rotating the holder 4 around the axis of the pin 16.
    The notches 23 in the cylindrical parts, the walls 2 of the frame 1 and the connecting bridge elements are of such a size that, during operation of the device, the tracking coil 20 does not touch the walls 2 and the bridge connecting elements.
    To determine and measure the radial position of the lens 5, the device comprises a detector 28 consisting of a printed circuit board, an LED, a lens and a mirror 29.
    The device frame 1 and the fastening assembly, consisting of cylindrical walls 2, lugs 32 and 33 and lugs 31, are made as a single unit, which simplifies the design of the device.
    The magnetic elements used in the device are made in the form of a disc-shaped or cylindrical axially magnetized permanent magnet 7 and a disc-shaped element 8 made of ferromagnetic material, which allows, with a simple design of the device, to perform highly efficient electromagnetic drives for focusing and tracking the information track.
    权利要求:
    Claims (3)
    [1]
    1. An electro-optical device for scanning an information track on a storage medium, comprising a focusing drive with coaxially mounted magnetic elements and a moving part with a tracking coil, the direction of which turns perpendicular to the direction of the turns of the focusing coil and which are fixed on the focusing drive, a frame with a fixing unit and a holder lens, the focusing coil is fixed in the holder and it is mounted relative to the frame with the possibility of rotation and movement along the axis coinciding with the axis of the focusing coil parallel to the optical axis of the lens, which is due to the fact that, in order to simplify the design of the device, two bridge connecting elements in the form of strips of magnetically soft material are inserted into the holes of the radial tracking coils and the ends of which are reinforced in the mounting frame of the frame,
    [2]
    2. Device pop. 1, characterized in that the mounting unit is made in the form of a single unit with the frame.
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that the magnetic elements are made in the form of a disc-shaped or cylindrical axially magnetized permanent magnet and a disc-shaped element made of ferromagnetic material, while the permanent magnet has a frame attachment node and its end is connected to the end of the disc-shaped element of ferromagnetic material.
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    同族专利:
    公开号 | 公开日
    CA1309498C|1992-10-27|
    DE3772934D1|1991-10-17|
    EP0268311A1|1988-05-25|
    JPS63104228A|1988-05-09|
    EP0268311B1|1991-09-11|
    NL8602564A|1988-05-02|
    US4817076A|1989-03-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH0226296B2|1981-06-22|1990-06-08|Sony Corp|
    JPS5862832A|1981-10-07|1983-04-14|Sanyo Electric Co Ltd|Lens driving mechanism of optical disk player|
    JPH0350336B2|1982-12-08|1991-08-01|Sony Corp|
    US4566089A|1983-03-30|1986-01-21|Mitsubishi Denki Kabushiki Kaisha|Deviation correction apparatus for optical disc light beams|
    JPS6319938B2|1983-07-19|1988-04-25|Sharp Kk|
    CA1249744A|1983-08-03|1989-02-07|Mitsuru Takashima|Optical pickup having a driving unit|
    JPS6098532A|1983-11-01|1985-06-01|Sharp Corp|Optical information reader|
    JPS60127538A|1983-12-13|1985-07-08|Sharp Corp|Objective lens driving device|
    JPH0146926B2|1983-12-26|1989-10-11|Sharp Kk|
    JPS6350771B2|1983-12-27|1988-10-11|Tokyo Shibaura Electric Co|
    JPH0572656B2|1984-08-08|1993-10-12|Matsushita Electric Ind Co Ltd|
    JPH042420Y2|1984-09-28|1992-01-28|
    NL8500592A|1985-03-04|1986-10-01|Philips Nv|ELECTRO-OPTICAL DEVICE.|
    JP3090786B2|1992-07-08|2000-09-25|花王株式会社|Vinegar production method|
    JPH0698532A|1992-09-14|1994-04-08|Matsushita Electric Works Ltd|Power supply device|
    JPH06145422A|1992-11-12|1994-05-24|Yokohama Rubber Co Ltd:The|Rubber composition for tire|JPH0750528B2|1987-06-25|1995-05-31|三菱電機株式会社|Objective lens drive|
    NL8802514A|1988-10-13|1990-05-01|Philips Nv|OPTICAL SCAN AND AN OPTICAL REGISTRATION / OR READING DEVICE THEREOF, AND A METHOD FOR MANUFACTURING THE SCAN AND RECORDING AND / OR READING DEVICE.|
    US5107485A|1988-10-27|1992-04-21|Eastman Kodak Company|Double solenoid focus actuator for optical recording/playback apparatus|
    US5239532A|1989-03-28|1993-08-24|U.S. Philips Corporation|Drive arrangement for the writing/reading heads of a magneto-optical disc apparatus|
    JPH0690803B2|1989-05-22|1994-11-14|パイオニア株式会社|Method of manufacturing information reader|
    US5416640A|1989-11-24|1995-05-16|Matsushita Electric Industrial Co., Ltd.|Objective actuator|
    US5319497A|1990-01-12|1994-06-07|Matsushita Electric Industrial Co., Ltd.|Lens drive device with lens holder carrying drive flux generating magnets|
    JPH077522B2|1990-01-31|1995-01-30|シャープ株式会社|Lens drive support|
    US5046819A|1990-04-16|1991-09-10|International Business Machines Corporation|Objective lens support having rotary and axial motions for use in an optical disk apparatus|
    US5920437A|1997-05-08|1999-07-06|Sankyo Seiki Mfg. Co., Ltd.|Objective lens driving apparatus|
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    US9077219B2|2011-09-26|2015-07-07|Pangolin Laser Systems, Inc.|Electromechanical limited rotation rotary actuator|
    US9991773B2|2015-02-06|2018-06-05|William R. Benner, Jr.|Low cost limited rotation rotary actuator|
    US10720824B2|2015-02-06|2020-07-21|William R. Benner, Jr.|Low cost limited rotation rotary actuator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL8602564A|NL8602564A|1986-10-13|1986-10-13|ELECTRO-OPTICAL SCANNER.|
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