JP2008243341A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device in which chucking sound can be surely made small. <P>SOLUTION: A traverse mechanism is provided freely rotatably between a reproduction position and a retreat position inside a case. A disk tray is moved between an exposed position exposed to the outside of the case and a housing position arranged inside the case. The traverse mechanism is rotated by rotation of a motor and the disk tray is moved. A position detecting switch is provided inside the case. The position detecting switch detects that the disk tray is moved to a deceleration position directly before the housing position, when detection is performed, a left switch-on signal is output to a control part. The control part performs control so that responding to such information from the position detecting switch that the left switch-on signal is input, after the motor is rotated for 0.5 sec. with rotary speed S2 being lower than rotary speed S1, the motor is rotated with rotary speed S3 being higher than the rotary speed S2 and being lower than rotary speed S1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus for reproducing and recording information recorded on a disc.

  In the optical disk apparatus, an optical disk such as a CD or a DVD is used as a storage medium. The optical disc apparatus is configured to incorporate a disc tray for loading an optical disc in a movable manner with respect to the main body case, pull out the disc tray to the outside of the main body case when the optical disc is attached or detached, and store the disc tray inside the main body case when used. The A spindle motor that rotates the optical disk loaded on the disk tray at high speed is provided inside the main body case. The spindle motor holds an optical disk and is attached with a turntable in which a magnet is embedded, and an iron plate as a magnetic body attracted by the magnetic force of the magnet of the turntable is provided inside the main body case. A clamper is arranged.

  A traverse mechanism having a spindle motor and an optical pickup is rotatably provided between a reproduction position for recording and / or reproducing data on an optical disk and a retraction position retracted from the reproduction position. After being stored inside, the traverse mechanism rotates to the playback position. When the traverse mechanism rotates to the reproduction position, the iron plate of the clamper is attracted by the magnetic force of the magnet of the turntable, and the optical disk is sandwiched between the turntable and the clamper. When replacing the optical disk, the traverse mechanism is displaced to the retracted position, the turntable and the clamper are separated, and the disk tray is pulled out of the main body case.

A chucking sound is generated when the clamper's iron plate is attracted by the magnetic force of the magnet of the turntable, and this chucking sound has a problem of giving the user unpleasant feeling. For this reason, a technique for reducing the chucking sound has been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-312148 JP 2007-042189 A

  However, in Patent Document 1, since the pulse cycle is switched according to the time from the start of loading, when the tray is pushed by the operator during loading, the pulse cycle is switched at a timing different from the desired timing. There is a problem that the traverse mechanism rotates to the reproduction position before the cycle is switched. In this case, the chucking sound cannot be reduced. In Patent Document 1, a detection unit is provided, and the pulse period is switched when detected by the detection unit, but there is no specific description of the detection unit. Furthermore, there is a problem that the cost is increased by providing the detection means.

  Further, in Patent Document 2, the tray loading / unloading path is divided into a plurality of sections, and the tray loading / unloading speed is switched for each section. In the section near the loading position, the tray loading speed is low. The traverse mechanism rotates to the reproduction position after the tray has moved to the carry-in position, and rotates using a motor for driving the tray as a drive source. For this reason, when the tray carry-in speed when moving to the carry-in position is lowered, the traverse mechanism rotates at a low speed, and the traverse mechanism can be rotated to the regeneration position without sufficient driving force of the motor. There was a problem that I could not.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical disc apparatus that can reliably reduce the chucking sound.

  In order to achieve the above object, an optical disc apparatus according to the present invention has an optical pickup and a spindle motor, and is between a reproduction position where data is recorded and / or reproduced on an optical disc and a retreat position retracted from the reproduction position. An optical disc apparatus comprising: a traverse mechanism provided inside the case so as to be displaceable; and a disc tray movable between an exposed position exposed outside the case and a storage position stored inside the case. A turntable provided in a spindle motor for holding the disc; a clamper for sandwiching the optical disc between the turntable when the traverse mechanism moves to the reproduction position; and a motor. When the disc tray is moved from the exposed position to the retracted position by rotation of And a displacement mechanism for displacing the traverse mechanism from the retracted position to the reproduction position after the disk tray has been moved to the storage position; and the disk tray has been moved to a position immediately before the storage position. In response to detection by the detection means, the motor is rotated at a speed lower than the rotational speed before detection for a preset time, and then at a speed higher than the low rotational speed. And a control means for controlling to rotate.

  The displacement of the traverse mechanism includes rotation and movement. Examples of the optical disk include CD, DVD, dual disk, and SACD (hybrid disk). Further, it is preferable that the movement displacement mechanism moves the disk tray from the exposure position to the storage position and displaces the traverse mechanism from the reproduction position to the retracted position by rotation of the motor. The movement displacement mechanism changes the movement speed of the disc tray and the displacement speed of the traverse mechanism in proportion to the rotation speed of the motor. Further, a magnet is provided on the turntable, and a magnetic member is provided on the clamper. When the traverse mechanism moves to the regeneration position, the magnetic member is attracted by the magnetic force of the magnet, and the turntable and the clamper are The optical disk is preferably sandwiched between the two.

  Moreover, it is preferable that the high-speed rotation speed is lower than the rotation speed before the detection.

  Furthermore, it is preferable that the detection means detects that the disc tray is located at the exposure position and the storage position, and detects that the traverse mechanism is located at the reproduction position and the retraction position.

  In addition, it is preferable that the control unit stops driving the motor in response to the disk tray having been moved to the exposure position and the traverse mechanism being displaced to the reproduction position.

  According to the optical disk device of the present invention, since it detects that the disk tray has moved to just before the storage position, and in response to the detection, the motor that displaces the traverse mechanism is rotated at a lower speed than before detection, The chucking sound generated when the traverse mechanism is displaced to the reproduction position and the turntable comes into contact with the clamper can be reduced as compared with the case where the traverse mechanism is displaced to the reproduction position at a constant motor rotation speed.

  In addition, after rotating the motor for a set time at a lower speed than before detection, the motor is rotated at a speed higher than this low speed, so that the traverse mechanism can be displaced to the playback position without sufficient driving force of the motor. The problem of being unable to occur does not occur, and the traverse mechanism can be reliably displaced to the reproduction position.

  1 and 2 show the appearance of an optical disc apparatus 2 using the present invention. The optical disk device 2 accesses a CD (optical disk) 3 to record and reproduce data on the CD 3, and is incorporated in a personal computer or the like. The optical disc apparatus 2 can also reproduce a DVD or the like.

  A traverse mechanism 10 including a disk tray 5, an optical pickup 6, a pickup base 7, a spindle motor 8, and a turntable 9, a circuit board, and the like are incorporated in the case 4 of the optical disc apparatus 2. The case 4 includes an upper cover 4a and a lower cover 4b (see FIG. 4). The optical pickup 6, the pickup base 7, the spindle motor 8, and the turntable 9 are not shown in FIGS. 1 and 2, and are shown in FIGS.

  On the front surface of the case 4 are provided various switches such as a reproduction switch 12 for reproducing CD3, a stop switch 13 for stopping reproduction of CD3, and an opening / closing switch 14 for opening / closing the disk tray 5. A plurality of switches including these open / close switches 14 are connected to a control unit (control means) 15 that performs main control of the optical disc apparatus 2. Note that the switch including the open / close switch 14 may be provided on the personal computer in which the optical disc apparatus 2 is incorporated, instead of being provided on the front surface of the case 4.

  The disc tray 5 is provided so as to be movable between a storage position (see FIG. 1) stored inside the case 4 during CD3 reproduction and an exposed position (see FIG. 2) exposed outside the case 4. It is moved by a tray moving mechanism 30 described later. When the disc tray 5 is moved, the open / close switch 14 is operated.

  The disc tray 5 is loaded with the CD 3 and has a recess corresponding to the outer diameter of the CD 3. An insertion hole 5a through which the spindle motor 8 and the turntable 9 are inserted when the disk tray 5 is located at the storage position is formed at the center of the disk tray 5, and the optical pickup 6 accesses the CD 3 continuously to the insertion hole 5a. An access opening 5b is formed.

  As shown in FIGS. 3, 4, and 5, the optical pickup 6 includes an objective lens 16 that condenses the laser light emitted from the light emitting element on the recording surface of the CD 3, and is attached to the pickup base 7. The holding shaft 17 is movably held. The optical pickup 6 is moved in the axial direction (A direction in FIG. 3) of the holding shaft 17 which is the radial direction of the CD 3 by a known moving mechanism.

  The turntable 9 is attached to the rotating shaft of the spindle motor 8. A chucking core portion 9 a is formed on the upper surface of the turntable 9. The chucking core portion 9a holds the CD3, and positioning ribs 9b for holding and positioning the CD3 are formed to project radially at a 120 ° pitch. On the upper surface of the turntable 9, an anti-slip sheet 18 is attached to prevent the CD 3 from slipping during CD3 reproduction.

  The chucking core portion 9a is formed with an engagement hole 9c into which the engagement convex portion 25d of the clamper 25 is inserted. Two magnets 19 are embedded in the chucking core portion 9a at a pitch of 180 °. The number of magnets 19 is not limited to two and can be changed as appropriate.

  Inside the case 4, a slider 20 for rotating the traverse mechanism 10 is provided. The slider 20 is provided so as to be slidable in the left-right direction. As will be described in detail later, the traverse mechanism 10 rotates in accordance with the slide of the slider 20.

  On the lower surface of the disk tray 5, a first guide rib 5c for guiding the first slider boss 20c of the slider 20 and a second guide rib 5d for guiding the second slider boss 20d are provided upright. Each of the guide ribs 5c and 5d is erected two by two, and each of the bosses 20c and 20d enters between the two ribs. Thus, when the disc tray 5 moves in the front-rear direction (vertical direction in FIG. 3), the bosses 20c, 20d are guided in the left-right direction by the guide ribs 5c, 5d, and the slider 20 slides in the left-right direction.

  Four dampers 21 and screws 22 are attached to the pickup base 7. Two screws 22 on the rear side (upper side in FIG. 3) are screwed to a mounting portion inside the case 4 via a damper 21, and the pickup base 7 is centered on the two screws 22. 5 is attached so as to be rotatable in the direction B in FIG.

  Two screws 22 on the front side (the lower side in FIG. 3) are attached to the rotation base 23 via the damper 21. A first base boss 23 a inserted into the first guide hole 20 a of the slider 20 and a second base boss 23 b inserted into the second guide hole 20 b are formed on the front surface of the rotary base 23. A rotation shaft 23 c is formed on the left and right side surfaces of the rotation base 23, and the rotation shaft 23 c is rotatably mounted inside the case 4. As a result, the rotation base 23 is rotatable in the direction B in FIG. 5 about the rotation shaft 23c. The rotary shaft 23c is not restricted in the vertical position in FIGS. 3 and 5, and when the pickup base 7 rotates around the upper screw 22 in FIG. 5, the rotary shaft 23c is in FIG. Move up and down. As a result, when the rotary base 23 rotates, the pickup base 7 rotates in the direction B in FIG. 5 around the two screws 22 on the rear side (upper side in FIG. 3). In the present embodiment, the traverse mechanism 10 having the pickup base 7 rotates between a retracted position (see FIGS. 4 and 5) and a reproduction position (see FIG. 13) according to the slide of the slider 20.

  The upper cover 4a is formed with a two-step stepped cover concave portion 4c, and an insertion hole 4d for inserting the main body portion 25a of the clamper 25 is formed on the bottom surface of the cover concave portion 4c. . The clamper 25 rotates in contact with the CD3 during reproduction of the CD3, and includes a main body portion 25a and a flange portion 25b. The main body portion 25a is formed with a smaller diameter than the insertion hole 4d, and the flange portion 25b is formed with a larger diameter than the insertion hole 4d. An insertion concave portion 25c into which the upper portion of the chucking core portion 9a is inserted is formed on the bottom surface of the main body portion 25a, and an engagement convex portion 25d to be inserted into the engagement hole 9c is erected in the insertion concave portion 25c. Has been. An iron plate 26 is attached to the main body portion 25a, and this iron plate 26 is attracted by the magnetic force of the magnet 19 embedded in the chucking core portion 9a. As a result, the clamper 25 is held by the chucking core portion 9a, and the CD3 is sandwiched between the turntable 9 and the clamper 25. In FIGS. 1 and 2, the cover recess 4c is not shown.

  As shown in FIGS. 4, 6 and 7, the slider 20 has a first guide hole 20a into which the first base boss 23a of the rotary base 23 is inserted and a second guide hole 20b into which the second base boss 23b is inserted. The first slider boss 20c guided by the first guide rib 5c of the disc tray 5 and the second slider boss 20d guided by the second guide rib 5d are formed. Each boss 20c, 20d is erected on the upper surface of the slider 20. A slider gear 20 e is formed on the front surface of the slider 20.

  The slider 20 has a switch insertion hole 20f through which the switch piece 27b of the rotatable position detection switch 27 is inserted. A position detection switch (detection means) 27 for detecting the positions of the disk tray 5 and the slider 20 is rotatably provided inside the case 4. In the position detection switch 27, a rod-like switch piece 27b is erected on the main body 27a. The position detection switch 27 is rotatably supported by a support member provided on a substrate (not shown). In FIG. 4, the position detection switch 27 is not shown in order to avoid cluttering the drawing.

  As shown in FIG. 7A, when the slider 20 slides leftward to the left slide position, the switch piece 27b is pressed by the slider 20, and the position detection switch 27 is rotated to the left switch-on position. As shown in FIG. 7B, when the slider 20 slides to the right slide position in the right direction, the switch piece 27b is pressed by the slider 20, and the position detection switch 27 is rotated to the right switch on position. The position detection switch 27 is connected to the control unit 15 and outputs a left switch-on signal to the control unit 15 when positioned at the left switch-on position, and outputs a left switch-on signal to the control unit 15 when positioned at the right switch-on position. Outputs a switch-on signal. When the slider 20 is located at a position other than the left / right switch on position, no signal is output from the position detection switch 27 to the control unit 15. The position detection switch 27 is urged by a switch spring (not shown) toward a switch-off position that is in a vertical state as shown in FIG.

  When the disc tray 5 is located at the exposed position (see FIG. 3), the second slider boss 20d is guided by the second guide rib 5d, and the slider 20 is located at the left slide position (see FIGS. 4 and 7A). . When the slider 20 is located at the left slide position, the traverse mechanism 10 is located at the retracted position.

  When the disc tray 5 moves from the exposure position (see FIG. 3) toward the storage position (see FIG. 12), the second slider boss 20d is guided by the second guide rib 5d, and the slider 20 moves rightward from the left slide position. Slide to. When the slider 20 slides to the right from the left slide position, the position detection switch 27 rotates from the left switch-on position to the switch-off position by the urging of the switch spring, and the position detection switch 27 to the control unit 15 is rotated. The output of the left switch on signal is stopped.

  As shown in FIGS. 3 and 4, the slider gear 20 e meshes with a semicircular semicircular gear 29 that is rotatably provided inside the case 4. The semicircular gear 29 meshes only with the slider gear 20e when the slider 20 is located between the left slide position (see FIGS. 4 and 7A) and the gear meshing position (see FIG. 10). When the slider 20 slides from the left slide position to the gear meshing position and the semicircular gear 29 rotates, the semicircular gear 29 meshes with the third gear 31c of the tray moving mechanism 30. The semicircular gear 29 is configured to mesh with the third gear 31c when the slider 20 slides between the gear meshing position and the right slide position (see FIGS. 7B and 12).

  As shown in FIGS. 4 and 8, a tray moving mechanism 30 for moving the disc tray 5 is provided inside the case 4. The tray moving mechanism 30 includes a tray gear 31, a relay pulley 32, a belt 33, a motor pulley 34, and a motor 35. The tray gear 31 and the relay pulley 32 are rotatably attached to a support shaft (not shown). The tray gear 31 is composed of a three-stage gear, and is a first-stage gear 31a, a second-stage gear 31b, and a third-stage gear 31c in order from the uppermost stage in FIG. The first stage gear 31 a meshes with a tray gear 5 e formed on the disc tray 5. 4, illustration of the belt 33, the motor pulley 34, and the motor 35 is omitted in order to avoid cluttering the drawing.

  A relay gear 32a is formed on the relay pulley 32, and the relay gear 32a meshes with the second gear 31b. The relay pulley 32 is provided concentrically with the semicircular gear 29. The motor pulley 34 is attached to the motor shaft of the motor 35, and a belt 33 is wound around the relay pulley 32 and the motor pulley 34. The motor 35 is connected to the control unit 15, and the drive is controlled by the control unit 15. The controller 15 drives the motor 35 when the open / close switch 14 is operated.

  When the motor 35 is driven and the motor pulley 34 rotates, the relay pulley 32 rotates through the belt 33, and the tray gear 31 meshed with the relay gear 32a rotates. As the tray gear 31 rotates, the disc tray 5 moves in the front-rear direction (vertical direction in FIG. 8). The moving speed of the disk tray 5 is proportional to the rotational speed of the motor 35. In the present embodiment, when the motor 35 is driven so that the motor pulley 34 rotates in the clockwise direction, the disc tray 5 moves from the exposed position toward the storage position, and the motor pulley 34 rotates in the counterclockwise direction. When 35 is driven, the disc tray 5 moves from the storage position toward the exposure position.

  When the open / close switch 14 is operated when the disc tray 5 is located at the exposure position (see FIG. 3), the control unit 15 drives the motor 35 so that the motor pulley 34 rotates in the clockwise direction. By driving the motor 35, the disc tray 5 moves toward the storage position. At this time, the control unit 15 rotates the motor 35 at the rotation speed S1 (rotation speed before detection) (see FIG. 9).

  A left slide guide portion 5f for sliding the slider 20 to the left slide position to the left slide position and rotating the position detection switch 27 to the left switch on position is formed at the front end portion of the second guide rib 5d of the disc tray 5. ing. By driving the motor 35, the disk tray 5 moves toward the storage position, and as shown in FIG. 8, the second slider boss 20d reaches the left slide guide portion 5f (hereinafter, the disk tray 5 moves to the deceleration position). Then, the slider 20 slides to the left slide position by the left slide guide portion 5f. When the slider 20 slides to the left slide position, the position detection switch 27 is rotated to the left switch-on position, and the position detection switch 27 outputs a left switch-on signal to the control unit 15.

  As shown in FIG. 9, when the control unit (control unit) 15 moves the disc tray 5 from the exposed position toward the storage position in the storage direction, the disc tray 5 reaches the deceleration position (position just before storage). In response to the movement of the left switch-on signal from the position detection switch 27, the motor 35 is rotated at a rotational speed S2 lower than the rotational speed S1 (for example, 1/3 of the rotational speed S1) for a predetermined time. After rotating (for example, 0.5 seconds), control is performed to rotate at a rotational speed S3 that is higher than the rotational speed S2 and lower than the rotational speed S1 (for example, 2/3 of the rotational speed S1). The control unit 15 controls the rotation speed of the motor 35 by changing the voltage applied to the motor 35.

  As shown in FIG. 10 and FIG. 11, immediately before the disc tray 5 moves from the deceleration position to the storage position, the slider 20 is guided by the first and second guide ribs 5c and 5d of the disc tray 5, and the semicircular gear. 29 slides to the gear meshing position where it meshes with the third gear 31c. When the slider 20 moves to the gear meshing position, the tray gear 5g is disengaged from the first gear 41a. When the semicircular gear 29 meshes with the third gear 31c, the slider 35 moves to the right via the motor pulley 34, the belt 33, the relay pulley 32, the tray gear 31, and the semicircular gear 29 by driving the motor 35. Slide. When the slider 20 slides to the right from the gear meshing position, the first slider boss 20c comes into contact with the first guide rib 5c, and the force of the slider 20 sliding to the right causes the disc tray 5 to move backward (upward in FIG. 10). ) To the storage position.

  When the slider 20 slides between the gear meshing position (see FIG. 10) and the right slide position (see FIGS. 7B and 12), the slider 20 slides by driving the motor 35, and the gear meshing position and the left slide. When sliding between the positions (see FIG. 3 and FIG. 8), the slide is performed by the guide ribs 5 c and 5 d of the disc tray 5.

  When the disk tray 5 is moved from the storage position toward the exposure position, the motor 35 is driven so that the motor pulley 34 rotates counterclockwise, and the slider 20 is slid leftward. At this time, the control unit 15 rotates the motor 35 at the rotation speed S1. When the slider 20 slides leftward to the gear meshing position, the first slider boss 20c comes into contact with the first guide rib 5c, and the disc tray 5 is moved forward (FIG. 10) by the sliding force of the slider 20 to the left. The tray gear 5e meshes with the first gear 31a, and the semicircular gear 29 is disengaged from the third gear 31c. Then, the drive of the motor 35 moves the disc tray 5 to the exposure position. At this time, when the disc tray 5 moves to the deceleration position, a left switch-on signal is input from the position detection switch 27 to the control unit 15, but the control unit 15 moves the disc tray 5 from the storage position toward the exposure position. When the signals are input in the order of the right switch-on signal and the left switch-on signal, the rotation speed control of the motor 35 is not performed. Thereby, the disk tray 5 can be moved from the storage position to the exposure position at a constant speed.

  When the disc tray 5 moves from the storage position to the exposure position, the position detection switch 27 rotates to the left switch-on position when the disc tray 5 moves to the deceleration position, and when the disc tray 5 moves to the exposure position. Rotate to the left switch-on position. The position detection switch 27 detects that the disc tray 5 is located at the exposure position and the traverse mechanism 10 is located at the retracted position when the position detection switch 27 is rotated twice to the left switch-on position. When the disc tray 5 moves from the storage position to the exposure position, signals are input to the control unit 15 in the order of a right switch-on signal, a left switch-on signal, and a left switch-on signal. When the signals are input in this order, the control unit 15 stops driving the motor 35.

  As shown in FIGS. 12 and 13, when the slider 20 is slid from the gear meshing position (see FIG. 10) toward the right slide position by driving the motor 35, the first and second base bosses 23 a and 23 b of the rotary base 23. Is guided by the first and second guide holes 20a and 20b, and the rotation base 23 is rotated in the direction B in FIG. 5 about the rotation shaft 23c.

  When the rotary base 23 is rotated, the traverse mechanism 10 is accordingly rotated in the direction B in FIG. 5 toward the reproduction position. When the slider 20 slides to the right slide position, the traverse mechanism 10 is rotated to the reproduction position. The rotational speed of the traverse mechanism 10 is proportional to the rotational speed of the motor 35. When the slider 20 slides to the right slide position, the position detection switch 27 is rotated to the right switch on position. When the position detection switch 27 is rotated to the right switch-on position, the position detection switch 27 detects that the disc tray 5 is located at the storage position and the traverse mechanism 10 is located at the reproduction position, and outputs a right switch-on signal to the control unit 15. To do. The control unit 15 stops driving the motor 35 in response to the input of the right switch-on signal. In the present embodiment, the movement displacement mechanism for moving the disc tray 5 and rotating the traverse mechanism 10 includes the tray moving mechanism 30, the first and second guide ribs 5c and 5d of the disc tray 5, the slider 20, and the rotation base. 23 first and second base bosses 23 a and 23 b and a semicircular gear 29.

  When the traverse mechanism 10 rotates to the reproduction position, the positioning rib 9b of the chucking core portion 9a is inserted into the disc hole 3a of the CD3. Further, the upper portion of the chucking core portion 9a is inserted into the insertion concave portion 25c of the clamper 25, and the engagement convex portion 25d of the clamper 25 is inserted into the engagement hole 9c of the chucking core portion 9a. In this state, the clamper 25 to which the iron plate (magnetic member) 26 is attached is held by the magnetism of the magnet 19 of the chucking core portion 9a, and the lower surface of the clamper 25 contacts the upper surface of the CD3. As a result, the CD 3 is sandwiched between the turntable 9 and the clamper 25, and the CD 3 is positioned in the vertical direction. At this time, a so-called chucking sound is generated, which is a contact between the chucking core portion 9a and the clamper 25. When the spindle motor 8 rotates during CD3 reproduction, the CD3, turntable 9 and clamper 25 rotate together.

  The operation of the optical disc apparatus 2 configured as described above will be described. In order to reproduce the CD3, first, the CD3 is loaded into the disc tray 5. Next, the open / close switch 14 is operated to move the disc tray 5 from the exposure position (see FIGS. 2 and 3) toward the storage position (see FIGS. 1 and 12). When the opening / closing switch 14 is operated, the control unit 15 rotates the motor 35 at the rotation speed S1.

  When the disk tray 5 moves from the exposed position toward the retracted position by the rotation of the motor 35, the first slider boss 20c of the slider 20 is guided by the first guide rib 5c, and the second slider boss 20d is guided by the second guide rib 5d. Then, the slider 20 slides to the right from the left slide position. When the slider 20 slides to the right from the left slide position, the position detection switch 27 rotates from the left switch-on position to the switch-off position by the urging of the switch spring, and the position detection switch 27 to the control unit 15 is rotated. Output of the right switch on signal is stopped.

  When the disc tray 5 moves to the deceleration position, the slider 20 slides to the left slide position by the left slide guide portion 5f. When the slider 20 slides to the left slide position, the position detection switch 27 is rotated to the left switch-on position, and the position detection switch 27 outputs a left switch-on signal to the control unit 15. In response to the input of the left switch-on signal from the position detection switch 27, the control unit 15 rotates the motor 35 for 0.5 seconds at a rotational speed S2 lower than the rotational speed S1, and then rotates the rotational speed. Control is performed to rotate at a rotational speed S3 that is faster than S2 and slower than rotational speed S1.

  When the disc tray 5 moves from the deceleration position toward the storage position, the slider 20 slides toward the right slide position by driving the motor 35, and the slide 20 causes the traverse mechanism 10 to move from the retracted position to the reproduction position. It is rotated. When the traverse mechanism 10 rotates to the reproduction position, the clamper 25 to which the iron plate 26 is attached is held by the magnetism of the magnet 19 of the chucking core portion 9a, and the CD3 is sandwiched between the turntable 9 and the clamper 25. .

  As described above, the control unit 15 rotates the motor 35 at the rotational speed S2 lower than the rotational speed S1 for 0.5 seconds when the disk tray 5 moves to the deceleration position, and then the rotational speed S2 is exceeded. Since the rotation is controlled to be performed at a high speed and a rotational speed S3 lower than the rotational speed S1, the rotational speed of the traverse mechanism 10 is higher than that of an optical disk apparatus of a type that rotates the traverse mechanism to a reproduction position at a constant motor rotational speed. Can be reduced, and the speed at which the chucking core portion 9a contacts the clamper 25 can be reduced. Thereby, the chucking sound generated when the chucking core part 9a contacts the clamper 25 can be reduced.

  In addition, since the control unit 15 performs the control so that the motor 35 is rotated at the rotational speed S2 for 0.5 seconds and then rotated at the rotational speed S3 higher than the rotational speed S2, the driving force of the motor 35 is insufficient. There is no problem that the mechanism 10 cannot be rotated to the reproduction position.

  Further, the control unit 15 controls the motor 35 to rotate at the rotation speed S2 in response to the detection of the position detection switch 27 that the disk tray 5 has moved from the exposure position to the deceleration position. Even when the tray 5 is pushed from the exposure position toward the storage position by the operator, the rotational speed of the traverse mechanism 10 can be reliably reduced. Thereby, the chucking sound can be reliably reduced.

  Further, since the position detection switch 27 that detects that the disc tray 5 is located at the exposure position and the storage position detects that the disc tray 5 has moved to the deceleration position, the disc tray 5 can be moved without adding parts. It is possible to detect movement to the deceleration position. Thereby, even when the present invention is implemented, there is no cost increase.

  In the above-described embodiment, the rotation speed of the motor 35 is increased from the rotation speed S2 to the rotation speed S3. However, the rotation speed of the motor 35 is gradually increased from the rotation speed S2 to the rotation speed S3. Also good.

  In the above embodiment, the tray moving mechanism 30 includes the tray gear 31, the relay pulley 32, the belt 33, the motor pulley 34, and the motor 35. However, the number of gears, pulleys, and the like can be changed as appropriate. .

  Further, in the above embodiment, the rotational speed S2 is set to about 1/3 of the rotational speed S1, and the rotational speed S3 is set to about 2/3 of the rotational speed S1, but the amount of change in the rotational speed can be changed as appropriate.

  In the above-described embodiment, the rotation speed S2 is rotated for 0.5 seconds and then the rotation speed S3 is higher than the rotation speed S2. However, the rotation time at the rotation speed S2 can be changed as appropriate. is there.

  Further, in the above embodiment, the present invention is applied to the optical disc apparatus 2 incorporated in a personal computer. However, the present invention can also be applied to various players such as a CD player and a DVD player.

1 is an external perspective view of an optical disc apparatus embodying the present invention. 1 is an external perspective view of an optical disc apparatus with a disc tray exposed. FIG. It is a front view which shows the optical disk apparatus when a disk tray is located in an exposure position. It is a lower surface sectional view showing an optical disc device when a disc tray is located in an exposure position. It is right side sectional drawing which shows an optical disk apparatus when a disk tray is located in an exposure position. It is a disassembled perspective view which shows a slider, a rotation base, and a rotation switch. It is lower surface sectional drawing which shows a slider and a rotation switch. It is right side sectional drawing which shows an optical disk apparatus when a disk tray is located in a deceleration position. 10 is a timing chart when the traverse mechanism rotates from the retracted position to the reproduction position after the disc tray has moved from the exposure position to the storage position. It is a front view which shows an optical disk device when a disk tray is located in a storing position and a slider is located in a gear meshing position. FIG. 6 is a lower side cross-sectional view showing the optical disc apparatus when the disc tray is located at the storage position and the slider is located at the gear meshing position. FIG. 6 is a front view showing the optical disc apparatus when the disc tray is located at the storage position, the slider is located at the right slide position, and the traverse mechanism is located at the reproduction position. FIG. 5 is a lower side cross-sectional view showing the optical disc apparatus when the disc tray is located at the storage position, the slider is located at the right slide position, and the traverse mechanism is located at the reproduction position.

Explanation of symbols

2 Optical disk device 3 CD (optical disk)
4 Case 5 Disc tray 5c 1st guide rib 5d 2nd guide rib 6 Optical pickup 8 Spindle motor 9 Turntable 10 Traverse mechanism 15 Control section (control means)
19 magnet 20 slider 20c first slider boss 20d second slider boss 25 clamper 26 iron plate (magnetic member)
27 Position detection switch (detection means)
30 Tray moving mechanism 35 Motor

Claims (4)

A traverse mechanism that has an optical pickup and a spindle motor, and is slidably provided inside the case between a reproduction position for recording and / or reproducing data on an optical disk and a retraction position retracted from the reproduction position;
In an optical disc device comprising a disc tray movable between an exposure position exposed outside the case and a storage position stored inside the case,
A turntable provided in the spindle motor and holding the disk;
A clamper that sandwiches the optical disc between the turntable when the traverse mechanism moves to the reproduction position;
And a motor that moves the disk tray from the exposed position to the storage position, and moves the disk tray from the retracted position to the playback position after moving the disk tray to the storage position. A moving displacement mechanism that displaces up to
Detecting means for detecting that the disk tray has moved to a position immediately before the storage position;
In response to detection by the detection means, the motor is controlled to rotate at a speed lower than the rotation speed before the detection for a preset time and then to rotate at a speed higher than the low speed. And an optical disc apparatus.   2. The optical disc apparatus according to claim 1, wherein the high-speed rotation speed is lower than the rotation speed before the detection.   The detection means detects that the disc tray is located at the exposure position and the storage position, and detects that the traverse mechanism is located at the reproduction position and the retraction position. Item 3. The optical disk device according to Item 1 or 2.   2. The control unit stops driving of the motor in response to the disk tray moving to the exposure position and the traverse mechanism being displaced to the reproduction position. Or an optical disk device according to any one of 3;

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