JP2009134790A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device improving the accuracy of guiding each of disks even by a lever capable of guiding two kinds of disks with different diameters into a chassis and reliably preventing a lever tip part from being brought into contact with the disk upon the rotation of the disk. <P>SOLUTION: The optical disk device includes the lever 301 abutting on the circumference of the inserted disk and rotated to draw the disk on a rotary table. The fulcrum of the drawing lever 301 is movable between a fixed fulcrum position 305a where a rotary fulcrum is fixed and a movable fulcrum region 305b where the rotary fulcrum is moved according to the rotation angle of the drawing lever 301. The rotary fulcrum of the drawing lever 301 is fixed to the fixed fulcrum position 305a and rotates around the fulcrum from the standby position of the drawing lever 301 to the rotational movement by a prescribed angle by the abutment against the circumference of the disk. The rotational movement is performed by moving the rotary fulcrum along the movable fulcrum region 305b when exceeding the prescribed angle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus that performs recording or reproduction on a disc-shaped recording medium such as a CD or a DVD, and more particularly to a so-called slot-in type optical disc apparatus that can directly insert or eject an optical disc from the outside. is there.

  There is a slot-in type optical disc apparatus that guides a disc by bringing a plurality of levers into contact with the end face of the disc. This slot-in type optical disk apparatus includes a disk that can currently handle a diameter of 12 cm and a disk that can handle both a diameter of 8 cm and 12 cm. An optical disc apparatus that can handle both 8 cm and 12 cm diameter optical discs has a pull-in lever that can be pulled in by sharing both 8 cm and 12 cm, and this pull-in lever can be used for both 8 cm discs and 12 cm discs. It has become.

  When a 12cm disc is stored in the chassis, the pull-in lever is brought into contact with the disc by rotating the pull-in lever itself to guide the 12cm disc, and when the disc is rotated after the 12cm disc is stored. It must be ensured that the pull-in lever does not interfere.

  Also, when the 8cm disc is stored in the chassis, the pull-in lever pushes the 8cm disc while guiding the 8cm disc by bringing the tip of the pull-in lever itself into contact with the disc, and after storing the 8cm disc. The retracting lever should not interfere with the rotation of the disk.

As described above, the pull-in lever needs to move from the standby position where the tip contacting the disk waits for the insertion of the 8 cm disk or the 12 cm disk to the retracted position when the 12 cm disk rotates, which is the maximum rotation angle of the pull lever. . Also, the standby position for waiting for the insertion of an 8 cm disc or a 12 cm disc does not know whether an 8 cm disc or a 12 cm disc is inserted, so that it can handle both an 8 cm disc and a 12 cm disc, and has an opening for inserting a 12 cm disc. It is necessary to be able to cope with a small 8 cm disc inserted from any position, and it is necessary to accurately determine the position.
JP 2003-045110 A

  However, because the tip of the pull-in lever draws a circular orbit due to the rotational movement of the lever, when the standby position for waiting for the insertion of the 8 cm disk or 12 cm disk, that is, the standby position of the pull-in lever is determined, the retract position when the 12 cm disk rotates. Is naturally determined in a limited arrangement of the pivot center of the pull-in lever.

  Similarly, when the retracting position when rotating the 12 cm disk, that is, the retracting position of the pull-in lever is determined, the retracting position waiting for the insertion of the 8 cm disk or the 12 cm disk is naturally determined while the rotation center of the pulling lever is limited.

  As described above, since the leading end of the pulling lever draws a circular orbit due to the rotational motion, there is a problem that the standby position of the pulling lever and the retracting position of the pulling lever cannot be set to the optimum positions.

  When the standby position of the pull-in lever is not optimal, the pull-in lever receives excessive force when inserting the disc, or the disc cannot be correctly guided to the 8 cm disc insertion completion position. If the retracting position of the pull-in lever is not optimal, the leading end of the pull-in lever contacts the disk when the disk rotates, and a wasteful load is applied when the disk rotates. In particular, the retracted position of the pull-in lever when rotating the 12 cm disk needs to consider interference with the inner surface of the chassis, so the optimal position is limited.

  In addition, the optical disk apparatus that can handle both the 8 cm disk and the 12 cm disk has a problem in that the number of parts is larger than that corresponding to only the 12 cm disk, and there are restrictions when it is reduced in thickness and size.

  The present invention has been made to solve the above-described problems. Even if the lever is capable of guiding two types of disks having different diameters into the chassis, the accuracy of guiding each disk is improved and the disk is rotated. An object of the present invention is to provide an optical disc apparatus that reliably prevents the leading end of the pull-in lever from coming into contact with the disc.

  The present invention has been made to solve the above-described problems, and is in contact with a rotary table that holds a first disk and a second disk having a different diameter from the first disk, and a periphery of the inserted disk. A lever that guides the disk on the rotating table while rotating, and the fulcrum of the lever moves to a fixed fulcrum position where the rotating fulcrum is fixed, and the rotating fulcrum moves according to the rotation angle of the lever. It can move between the movement fulcrum areas, and it rotates with the fixed fulcrum position fixed to the rotation fulcrum from the standby position of the lever to the periphery of the disk and rotating at a predetermined angle. If it exceeds, the optical disk apparatus is characterized in that it rotates while moving the rotation fulcrum along the movement fulcrum area.

  According to the present invention, the fulcrum of the lever is movable between the fixed fulcrum position where the rotation fulcrum is fixed and the movement fulcrum region where the rotation fulcrum moves according to the rotation angle of the lever. The fixed fulcrum position is fixed to the rotation fulcrum from the standby position of the lever to the periphery of the disk and rotated by a predetermined angle, and when the predetermined angle is exceeded, the rotation fulcrum is moved along the moving fulcrum region. By turning while moving, the turning trajectory of the tip of the lever contacting the optical disc is changed from a circular orbit to an elliptical orbit on the way. The standby position of the tip of the lever waiting for the insertion of the disk or the second disk and the retracted position of the tip of the lever when the second disk is rotated can be set to optimum positions. As a result, even if the lever can guide two types of disks with different diameters into the chassis, the standby position and the retracted position of the lever tip are set to their optimum positions, improving the accuracy of guiding each disk. In addition, it is possible to realize an optical disk device that reliably prevents the lever tip from coming into contact with the disk when the disk rotates.

  The lever fulcrum is movable between a fixed fulcrum position where the pivot fulcrum is fixed and a movable fulcrum area where the pivot fulcrum moves according to the pivot angle of the lever, and the lever is on standby. The fixed fulcrum position is fixed to the rotation fulcrum until it contacts the periphery of the disc and rotates by a predetermined angle from the position, and if it exceeds the predetermined angle, it rotates while moving the rotation fulcrum along the moving fulcrum area. By moving, the turning trajectory of the lever tip contacting the optical disk is changed from a circular orbit to an elliptical orbit on the way. In consideration of this interference and the interference with the chassis, the trajectory along which the lever tip moves can be determined freely, so that an optical disc apparatus that can be reduced in thickness and size can be realized.

  According to the first aspect of the present invention, there is provided a rotary table for holding a first disk and a second disk having a diameter different from that of the first disk, and a disk on the rotary table while rotating in contact with the periphery of the inserted disk. The lever fulcrum is movable between a fixed fulcrum position where the pivot fulcrum is fixed and a moving fulcrum area where the pivot fulcrum moves according to the pivot angle of the lever. The fixed fulcrum position is fixed to the rotation fulcrum from the standby position of the lever to the periphery of the disc and rotated by a predetermined angle, and when the angle exceeds the predetermined angle, it rotates along the moving fulcrum region. It is characterized by rotating while moving the moving fulcrum. The lever fulcrum is movable between a fixed fulcrum position where the pivot fulcrum is fixed and a moving fulcrum area where the pivot fulcrum moves according to the pivot angle of the lever, and the disc is moved from the standby position of the lever. The fixed fulcrum position is fixed to the rotation fulcrum until it rotates around a predetermined angle by contacting the periphery of the lens, and when the angle exceeds the predetermined angle, the rotation is performed while moving the rotation fulcrum along the moving fulcrum region. Accordingly, the turning trajectory of the lever tip contacting the optical disc is changed from a circular trajectory to an elliptical trajectory in the middle, so that the first disc or the second disc is inserted depending on the combination of the movement amount by the circular trajectory and the movement amount by the elliptic trajectory. The stand-by position of the tip of the lever that waits for the lever and the stand-by position of the tip of the lever when the second disk rotates can be set to optimum positions. As a result, even if the lever can guide two types of disks with different diameters into the chassis, the standby position and the retracted position of the lever tip are set to their optimum positions, improving the accuracy of guiding each disk. In addition, it is possible to realize an optical disk device that reliably prevents the lever tip from coming into contact with the disk when the disk rotates. The lever fulcrum is movable between a fixed fulcrum position where the pivot fulcrum is fixed and a movable fulcrum area where the pivot fulcrum moves according to the pivot angle of the lever, and the lever is on standby. The fixed fulcrum position is fixed to the rotation fulcrum until it contacts the periphery of the disc and rotates by a predetermined angle from the position, and if it exceeds the predetermined angle, it rotates while moving the rotation fulcrum along the moving fulcrum area. By moving, the turning trajectory of the lever tip contacting the optical disk is changed from a circular orbit to an elliptical orbit on the way. Therefore, the trajectory along which the lever tip moves can be freely determined in consideration of the interference with the chassis and the interference with the chassis, so that it is possible to realize an optical disc apparatus that can be reduced in thickness and size.

  The invention described in claim 2 is provided with a base for holding the fulcrum of the lever, and the fulcrum of the lever is a protrusion provided on the base, and is movable along a long hole provided in the lever. It is what. As a result, the engagement position of the protrusion with respect to the long hole is changed, so that a fixed fulcrum position where the lever pivot fulcrum is fixed, and a movement fulcrum region where the lever pivot fulcrum moves according to the lever pivot angle, Can be realized with an easy configuration.

  According to a third aspect of the present invention, the lever is provided with the second protrusion, the base is provided with the second elongated hole, and the second protrusion moves along the circumference of a circle centered on the protrusion. And a second region in which the second protrusion moves along a linear groove different from the circumference of the circle centered on the protrusion when the lever rotates beyond a predetermined angle. When rotating beyond a predetermined angle, the second protrusion moves from the first region of the second elongated hole to the second region, thereby rotating while moving the pivoting fulcrum along the moving fulcrum region of the elongated hole. It is characterized by this. As a result, when the pivoting angle of the lever is larger than the predetermined angle, the protrusion rotates while moving the pivoting fulcrum along the moving fulcrum region of the long hole, so that the insertion of the first disk or the second disk is not possible. The standby position of the lever tip during rotation of the second disk can be set to the optimum position without being affected by the standby position of the waiting lever tip.

  The invention according to claim 4 is characterized in that the second region of the second long hole is arranged so that the distance from the fixed fulcrum position of the long hole becomes closer as the distance from the first region increases. As a result, when the second protrusion of the lever moves along the second region of the second elongated hole, the lever fulcrum is continuously moved, and the rotation trajectory of the lever tip contacting the optical disk is gently changed. Therefore, when a protrusion moves a long hole, it can prevent receiving a sudden load from a long hole.

  The invention according to claim 5 is characterized in that when the first disk is guided by the lever, the second protrusion moves only in the first region of the second elongated hole, and the protrusion continues to be located at the fixed fulcrum position. It is. As a result, when the first disk is guided by the lever, the lever is not moved linearly but only by rotational movement, so that a loss occurs in the force for guiding the disk while the tip of the lever is in contact with the periphery of the disk. There is no.

  According to a sixth aspect of the present invention, when the second disc is guided by the lever, the second projection moves in the second region of the second slot after moving the first region of the second slot, and the second projection The protrusion is positioned at a fixed fulcrum position when moving in the first region of the second elongated hole, and the protrusion is positioned in the moving fulcrum region when the second protrusion moves in the second region of the second elongated hole. Is. Accordingly, the rotation trajectory of the lever tip contacting the optical disc is changed from a circular trajectory to an elliptical trajectory in the middle, so that the standby position of the lever tip waiting for insertion of the first disc or the second disc can be easily configured. The retracted position of the lever tip during rotation of the second disk can be set to the optimum position.

  According to the seventh aspect of the present invention, when the second protrusion moves in the first region of the second long hole, the track on which the tip of the lever moves is a circular track, and the second protrusion moves the second region of the second long hole. When moving, the trajectory along which the tip of the lever moves is an elliptical trajectory. As a result, the rotation trajectory of the lever tip contacting the optical disc is changed from a circular trajectory to an elliptical trajectory on the way, so that the lever tip waiting for insertion of the first disc or the second disc can be easily changed. And the standby position of the lever tip during rotation of the second disk can be set to optimum positions.

  In the eighth aspect of the invention, the rotation fulcrum of the lever is closer to the rotary table than the line connecting the end of the lever with which the first disk contacts and the center of the first disk immediately before the lever contacts with the first disk. It is characterized by being located. As a result, when the first disk is inserted from a disk insertion slot wider than the diameter of the first disk, even if the center of the first disk is inserted with a large deviation from the center axis of the disk insertion slot, the lever rotates. No force is applied to the lever in the direction that it cannot move, so there is no excessive load on the lever. As a result, since an excessive load is not applied to the lever, it is possible to avoid breakage of the lever when the first disk is inserted from the disk insertion port.

  The invention according to claim 9 is characterized in that the protrusion and the second protrusion have a columnar shape, and the side surfaces of the columnar shape move along the long hole and the second long hole, respectively. As a result, the engagement between the protrusion and the long hole and the engagement between the second protrusion and the second long hole are smoothly performed, so that the force for rotating the lever can be minimized.

  The invention according to claim 10 is characterized in that when the lever is rotated to the maximum, the groove width of the moving fulcrum region where the projection of the base is located is larger than the groove width of the fixed fulcrum position. As a result, when the lever rotates to the maximum and the tip of the lever moves to the retracted position, the tip of the lever contacts the inner wall of the chassis, and the contact between the protrusion on the base and the long hole of the lever Even when a load is generated at the joint, the load is released by moving the end opposite to the tip of the lever within the groove width of the moving fulcrum region. No excessive load is applied between the long holes of the. As a result, an excessive load is not applied between the projection on the base and the long hole of the lever, so that the protrusion on the base and the long hole on the lever are caused by the tip of the lever contacting the inner wall of the chassis. Will not be damaged.

  The invention according to claim 11 is characterized in that the first disk has a diameter of 8 cm and the second disk has a diameter of 12 cm. As a result, when an 8 cm diameter disc is inserted, the turning trajectory of the lever tip contacting the optical disc is a circular trajectory, and when the 12 cm diameter disc is inserted, the lever tip contacting the optical disc is rotated. Since the trajectory to be used is initially a circular trajectory and then changed to an elliptical trajectory, the standby position waiting for the insertion of the 8 cm diameter disc and the 12 cm diameter disc and the retracted position when rotating the 12 cm diameter disc can be set to the optimum positions.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. In the first embodiment, a description will be given assuming that the first disk mounted on the optical disk apparatus is a small disk having a diameter of 8 cm and the second disk is a large disk having a diameter of 12 cm.

  1 is a plan view of a base body of an optical disc apparatus according to Embodiment 1 of the present invention, FIG. 2 is a plan view of a lid of the optical disc apparatus according to Embodiment 1 of the present invention, and FIG. 3 is Embodiment 1 of the present invention. It is a front view of the bezel with which the front surface of the chassis exterior in is attached. In FIG. 1, 1a is a large diameter disk, 1b is a small diameter disk, 10 is a base body, 10a is a deep bottom part, 10b is a shallow bottom part, 11 is a disk insertion slot, 12 is a connector, 30 is a traverse, 31 is a spindle motor, 31a Is a rotary table, 32 is a pickup, 33 is a drive motor, 40 is a main slider, 80 is a large-diameter pull-in lever, 81 is a second disk guide, 90 is a sub-lever, 92 is a pivot point, 100 is a discharge lever, and 101 is a first lever 4-disc guide, 102 is a pivot point, 103 is a contact portion, 110 is a regulating lever, 111 is a pivot point, 112 is a sixth disc guide, 130 is a lid, 140 is a bezel, 180 is a set guide lever, 181 Is the rotation fulcrum, 182 is the fifth disk guide, 201 is the retracting guide lever, 202 is the tip, and 203 is the first detent. Disk guide, 301 draws lever 302 tip 401 rear base, 501 is a line. In the first embodiment, the rotary table corresponds to the rotary table 31a, the lever corresponds to the pull-in lever 301, and the base corresponds to the rear base 401.

  In the optical disk apparatus according to the first embodiment, a base body 10 and a lid 130 form a chassis exterior, and a bezel 140 is mounted on the front surface of the chassis exterior. The bezel 140 is provided with a disk insertion slot 11, and has a slot-in configuration in which a 12 cm diameter large diameter disk 1 a and a 8 cm diameter small diameter disk 1 b are directly inserted from the disk insertion opening 11.

  Each component that performs a recording / reproducing function for the large-diameter disk 1a or the small-diameter disk 1b and a loading function for the large-diameter disk 1a or the small-diameter disk 1b is mounted on the base body 10.

  The base body 10 has a deep bottom portion 10a and a shallow bottom portion 10b with respect to the lid body 130, and a wing portion extending from the front surface to the rear surface is formed by the shallow bottom portion 10b.

  A disk insertion slot 11 into which a disk is directly inserted is formed on the front side of the base body 10, and a connector 12 is disposed at the end of the rear surface of the base body 10. The traverse 30 is disposed on the disk insertion slot 11 side of the base body 10, and the rear base 401 is disposed on the connector 12 side of the base body 10. A printed circuit board (not shown) is provided below the rear base 401.

  The traverse 30 holds a spindle motor 31, a pickup 32, and driving means for moving the pickup 32. The spindle motor 31 has a rotating table 31a that holds a disk on its rotating shaft. A spindle motor 31 that rotates the large-diameter disk 1 a or the small-diameter disk 1 b is provided on one end side of the traverse 30, and the pickup 32 is provided so as to be movable from one end side to the other end side of the traverse 30. The pickup 32 is disposed on the other end side of the traverse 30 when stopped.

  The drive means has a drive motor 33, a pair of rails for sliding the pickup 32, and a gear mechanism for transmitting the drive of the drive motor 33 to the pickup 32. The pair of rails are one end side and the other end of the traverse 30. It arrange | positions at both sides so that the side may be connected.

  In the traverse 30, the spindle motor 31 is located at the center of the base body 10, the reciprocating range of the pickup 32 is located closer to the disc insertion opening 11 than the spindle motor 31, and the reciprocating direction of the pickup 32 is It is arranged so as to be different from the insertion direction. Here, the reciprocating direction of the pickup 32 and the disc insertion direction are at an angle of 45 degrees.

  Next, a guide member that supports the disk when the large-diameter disk 1a or the small-diameter disk 1b is inserted and a lever member that operates when the disk is inserted will be described.

  A pull-in guide lever 201 is provided on one end side of the deep bottom portion 10a near the disc insertion slot 11. The pull-in guide lever 201 has a rotation fulcrum, and the tip 202 of the pull-in guide lever 201 moves while abutting against the side surface of the inserted disk by supporting the disk while rotating the fulcrum. Lead inside the chassis. A first disk guide 203 is provided at the distal end 202 of the pull-in guide lever 201. The first disk guide 203 is composed of two guide parts, and the disk is supported so as to be sandwiched between the two guide parts. .

  On the other hand, a large-diameter pulling lever 80 is provided on the other end side of the deep bottom portion 10a near the disc insertion slot 11. A second disk guide 81 is provided at the movable side end of the large-diameter pull-in lever 80. The second disk guide 81 is composed of a cylindrical roller, a part of the roller forms an upper guide, and a fixed portion is provided on a surface facing the upper guide, so that the disk is sandwiched between the upper guide and the fixed portion. Supported by

  Further, a long groove is provided between the movable side end portion and the fixed side end portion of the back surface (the surface on the base body 10 side) of the large diameter pull-in lever 80. On the other hand, a guide having a predetermined length is provided between the movable side end portion and the fixed side end portion of the surface of the large diameter pull-in lever 80.

  The large diameter pull-in lever 80 is operated by the sub lever 90.

  The sub lever 90 includes a convex portion at one end on the movable side, and a rotation fulcrum 92 on the other end side. The convex portion of the sub lever 90 slides in a long groove (not shown) of the large diameter pulling lever 80. Further, the rotation fulcrum 92 of the sub lever 90 is located on the main slider 40. The rotation fulcrum 92 is not linked to the main slider 40 and is fixed to the base body 10. Further, a pin is provided on the lower surface of the sub lever 90. This pin slides in a cam groove provided on the upper surface of the main slider 40. Accordingly, the angle of the sub lever 90 is changed with the movement of the main slider 40, and the turning angle of the large-diameter pull-in lever 80 is changed by changing the angle of the sub lever 90. That is, the operation of the sub lever 90 causes the second disk guide 81 of the large diameter pull-in lever 80 to move closer to and away from the spindle motor 31.

  A discharge lever 100 is provided on a side portion of the base body 10 that is different from the large-diameter pull-in lever 80. A fourth disk guide 101 is provided at the movable side end of the discharge lever 100. A rotation fulcrum 102 is provided on the other end side of the discharge lever 100. Further, a contact portion 103 is provided on the movable side end of the discharge lever 100 on the rear surface side of the fourth disc guide 101. Further, the discharge lever 100 is provided with an elastic body, and the discharge lever 100 is urged to rotate in the direction of the disc insertion slot 11 by the elastic force of the elastic body. Note that the discharge lever 100 operates in conjunction with the movement of the main slider 40.

  A restriction lever 110 is provided on the rear surface side of the base body 10. The regulating lever 110 has a rear surface side end as a rotation fulcrum 111 and a movable side end provided with a sixth disk guide 112. The restriction lever 110 is urged by an elastic body so that the sixth disk guide 112 side always protrudes to the front side. The restriction lever 110 operates the limit switch at a predetermined position. That is, when the large-diameter disk 1a is inserted to a predetermined position, the limit switch is turned off and the loading motor 60 is driven. The main slider 40 slides by driving the loading motor.

  A set guide lever 180 is provided on the side of the base body 10 on the same side as the discharge lever 100. The set guide lever 180 has a rotation fulcrum 181 on the rear surface side and a fifth disc guide 182 on the movable side. The set guide lever 180 is urged by an elastic body so that the fifth disk guide 182 side protrudes toward the disk side. The set guide lever 180 operates in conjunction with the main slider 40 so that the fifth disk guide 182 side is separated from the disk in accordance with the movement of the main slider 40.

  A pull-in lever 301 is provided on the side of the base body 10 opposite to the set guide lever 180. The pull-in lever 301 is rotatably held by a rear base 401 fixed to the base body 10, and includes a third disk guide 303 at a movable side distal end 302 with the rear surface side as a rotation fulcrum. The pull-in lever 301 is urged by an elastic body so that the third disk guide 303 approaches the spindle motor 31.

  The pivot point of the pull-in lever 301 is the third disk guide 303 of the pull-in lever 301 with which the small-diameter disk 1b comes into contact immediately before the small-diameter disk 1b is inserted through the disk insertion slot 11 and the pull-in lever 301 comes into contact with the small-diameter disk 1b. And a line 501 connecting the center of the small-diameter disk 1b to the rotary table 31a side. Thereby, when inserting the small-diameter disk 1b from the disk insertion slot 11 wider than the diameter of the small-diameter disk 1b, if the small-diameter disk 1b is inserted out of the central axis of the disk insertion slot 11, the pull-in lever 301 cannot rotate. Since no force is applied when the small-diameter disk 1b is inserted, an excessive load is not applied to the pull-in lever 301. As a result, an excessive load is not applied to the pull-in lever 301, so that the pull-in lever 301 can be prevented from being damaged when the small-diameter disk 1b is inserted from the disk insertion slot 11.

  Hereinafter, the movement of each member when a small-diameter disk (diameter 8 cm) is inserted will be described with reference to FIGS. 1 and 4 to 8.

  As shown in FIG. 1, in a state where the small-diameter disk 1b is not inserted, the pull-in guide lever 201 and the pull-in lever 301 are on standby in a state where they are rotated by a fixed angle toward the spindle motor 31 side. In this state, the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is narrower than the diameter of the small-diameter disk 1b.

  At the initial stage when the small-diameter disk 1 b is inserted, the position of the small-diameter disk 1 b is regulated by the pull-in guide 201 and the pull-in lever 301. Thereafter, when the small-diameter disk 1b is further pushed in, the pull-in guide lever 201 and the pull-in lever 301 pivot in a direction away from the spindle motor 31 along with the insertion operation.

  FIG. 4 is a plan view showing the relationship between the pull-in lever and the rear base at the initial stage when the small-diameter disk is inserted, and shows the same state as that shown in FIG. In FIG. 4, 1b is a small-diameter disk, 301 is a retracting lever, 302 is a tip, 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 Is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first region, 403b is a second region, and 403c is an end. Note that the lever in the first embodiment corresponds to the protrusion 402 of the pull-in lever 301.

  The pull-in lever 301 is rotatably held by a rear base 401 fixed to the base body 10. The rear base 401 has a protrusion 402, and the pull-in lever 301 has a second protrusion 304. The pull-in lever 301 has a long hole 305 that engages with the protrusion 402, and the rear base 401 has a second long hole 403 that engages with the second protrusion 304. The pull-in lever 301 is rotatably held by a rear base 401 fixed to the base body 10, and a pivot point of the pull-in lever 301 that guides the small-diameter disk 1 b into the chassis is a protrusion 402 of the rear base 401.

  The protrusion 402 of the rear base 401 has a cylindrical shape, and the side surface of the protrusion 402 moves along the elongated hole 305 of the pull-in lever 301. Thus, the rotation fulcrum of the drawing lever 301 is movable. Further, the second protrusion 304 of the pull-in lever 301 has a cylindrical shape like the protrusion 402, and the side surface of the second protrusion 304 moves along the second long hole 403 of the rear base 401.

  When the inserted small-diameter disk 1b comes into contact with a third disk guide 303 provided at the movable end 302 of the pull-in lever 301 and rotates the third disk guide 303, the rear base 401 has a second one according to the amount of rotation. The second protrusion 304 of the pull-in lever 301 moves inside the second long hole 403. Corresponding to the movement of the second protrusion 304, the engagement position of the protrusion 402 of the rear base 401 and the elongated hole 305 of the pull-in lever 301 changes.

  The long hole 305 includes a fixed fulcrum position 305 a where the rotation fulcrum of the pull-in lever 301 is fixed, and a movement fulcrum region 305 b where the rotation fulcrum of the pull-in lever 301 moves according to the rotation angle of the pull-in lever 301. ing.

  The second elongated hole 403 includes a first region 403a in which the second protrusion 304 of the pull-in lever 301 moves along the circumference of a circle centered on the protrusion 402 of the rear base 401, and the pull-in lever 301 exceeds a predetermined angle. The second region 403b is configured such that the second protrusion 304 moves along a linear groove different from the circumference of the circle centered on the protrusion 402 when rotated. When the pull-in lever 301 rotates beyond a predetermined angle, the second protrusion 304 moves from the first area 403a of the second long hole 403 to the second area 403b, thereby moving the protrusion 402 to the movement fulcrum area 305b of the long hole 305. It is set as the structure rotated while moving a rotation fulcrum along.

  Here, since the protrusion 402 and the second protrusion 304 have a cylindrical shape, the side surfaces of the columnar shape move along the long hole 305 and the second long hole 403, respectively. Since the engagement and the engagement between the second protrusion 304 and the second elongated hole 403 are smoothly performed, the force for rotating the pull-in lever 301 can be minimized.

  Further, the second region 403b of the second long hole 403 is arranged so that the distance from the fixed fulcrum position 305a of the long hole 305 is closer as it is away from the first region 403a. Accordingly, when the second protrusion 304 of the pull-in lever 301 moves along the second long hole 403 and the second region 403b, the fulcrum of the pull-in lever 301 is continuously moved, and the pull-in lever 301 that contacts the small-diameter disk 1b is moved. Since the rotation trajectory of the third disc guide 303 located at the distal end 302 is gently changed, the projection 402 of the rear base 401 does not receive a sudden load from the long hole 305 when moving through the long hole 305 of the pull-in lever 301. You can

  FIG. 5 is a plan view of the base main body of the optical disk apparatus according to Embodiment 1 of the present invention, showing a stage during insertion of a small-diameter disk. FIG. 6 is a plan view showing the relationship between the pull-in lever and the rear base in the middle stage of inserting the small-diameter disk, and shows the same state as that shown in FIG. 5 and 6, 1b is a small-diameter disk, 31 is a spindle motor, 60 is a loading motor, 100 is a discharge lever, 101 is a fourth disk guide, 201 is a retracting guide lever, 203 is a first disk guide, and 301 is retracting Lever, 302 is the tip, 303 is the third disc guide, 304 is the second protrusion, 305 is the long hole, 305a is the fixed fulcrum position, 305b is the moving fulcrum area, 401 is the rear base, 402 is the protrusion, 403 is the second long The hole, 403a is the first region, 403b is the second region, and 403c is the end.

  The first protrusion 304 of the pull-in lever 301 extends from the middle of the first region 403a corresponding to the standby position of the pull-in lever 301 from the initial stage when inserting the disk shown in FIG. It moves toward the second area 403b and stops once immediately after entering the second area 403b. At this time, when the second protrusion 304 is moving along the first region 403a, the first region 403a is formed along the circumference of the circle centered on the protrusion 402. 401 does not move from the fixed fulcrum position 305 a of the elongated hole 305 of the pull-in lever 301. Further, when the second protrusion 304 is moving along the second region 403b, the second region 403b is not formed along the circumference of the circle centered on the protrusion 402, and thus the protrusion 402 of the rear base 401 is formed. Leaves the fixed fulcrum position 305a of the elongated hole 305 of the pull-in lever 301 and enters the moving fulcrum region 305b. Therefore, the turning trajectory of the tip portion 301 of the pull-in lever 301 initially draws a circular trajectory, and then changes to an elliptical trajectory.

  Here, the position at which the second protrusion 304 temporarily stops after the movement starts is such that the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is substantially the same as the diameter of the small-diameter disk 1b. When it is.

  When the small-diameter disk 1b is further inserted from the state shown in FIGS. 1 and 4, one end of the disk is supported by the pull-in guide lever 201, and the other end is supported by the pull-in lever 301. The pull-in lever 301 is a spindle motor. It is in a state farthest from 31. In this state, the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is the same as the diameter of the small-diameter disk 1b.

  From this point, when the small-diameter disk 1b is further pushed in, the third disk guide 303 of the pull-in lever 301 starts to move in the direction closer to the spindle motor 31 along with this insertion operation. With this operation, the small-diameter disk 1b is further drawn into the chassis, contacts the fourth disk guide 101 of the discharge lever 100, the discharge lever 100 rotates, and the discharge lever 100 approaches the spindle motor 31. By rotating a predetermined angle, a limit switch (not shown) is operated, and driving of the loading motor 60 is started. At this time, the small-diameter disk 1 b is supported at three points: the first disk guide 203 of the pull-in guide lever 201, the third disk guide 303 of the pull-in lever 301, and the fourth disk guide 101 of the discharge lever 100.

  When the driving of the loading motor 60 is started, the pulling lever 301 is urged through the cam mechanism in the direction of turning to the spindle motor 31 side. Accordingly, the pull-in lever 301 biases the small-diameter disk 1b in the direction of pulling it into the chassis. Due to the urging force of the pull-in lever 301, the small-diameter disk 1b is released from an artificial operation and further pushed.

  FIG. 7 is a plan view of the base main body of the optical disk apparatus according to Embodiment 1 of the present invention, and shows a stage where the small-diameter disk insertion is completed. FIG. 8 is a plan view showing the relationship between the pull-in lever and the rear base at the stage of completing the small-diameter disk insertion, and shows the same state as that shown in FIG. 7 and 8, 1b is a small-diameter disk, 31 is a spindle motor, 60 is a loading motor, 100 is a discharge lever, 101 is a fourth disk guide, 110 is a regulating lever, 112 is a sixth disk guide, and 180 is a set guide. Lever, 182 is a fifth disk guide, 201 is a pull-in guide lever, 203 is a first disk guide, 301 is a pull-in lever, 302 is a tip, 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first area, 403b is a second area, and 403c is an end.

  When the small-diameter disk 1 b is further pushed in by the urging force of the pull-in lever 301, the small-diameter disk 1 b includes the first disk guide 203 of the pull-in guide lever 201, the third disk guide 303 of the pull-in lever 301, and the fourth disk of the discharge lever 100. The small-diameter disc 1b supported at the three points of the guide 101 is hereinafter referred to as the third disc guide 303 of the pull-in lever 301, the fifth disc guide 182 of the set guide lever 180, and the sixth disc guide 112 of the regulating lever 110. It will be supported at 3 points. Thereafter, the small-diameter disk 1b moves to a position where the center hole thereof corresponds to the rotary table 31a, and is regulated at that position.

  Then, the operation of the traverse 30 is started from the state shown in FIG. That is, the traverse 30 starts to move in a direction in which the spindle motor 31 side approaches the lid body 130. In a state where the spindle motor 31 side is operated in the direction closest to the lid 130, the small-diameter disk 1 b comes into contact with the lid 130 and is pressed by the spindle motor 31 and the lid 130. With this pressing force, the hub of the spindle motor 31 is fitted into the center hole of the small-diameter disk 1b, and the chucking is completed. When the chucking is completed, the traverse 30 operates in a direction in which the spindle motor 31 side is separated from the lid body 130. This operation is further performed by driving the loading motor 60.

  Direction from the mid-stage of inserting the disk shown in FIG. 5 to the stage of completing the disk insertion shown in FIG. 7, that is, immediately after the second protrusion 304 enters the second area 403b, and then the direction in which the second protrusion 304 moves. And start moving toward the end 403c of the first region 403a. When the second protrusion 304 is moving along the second region 403b, the second region 403b is not formed along the circumference of the circle centered on the protrusion 402, so that the protrusion 402 of the rear base 401 is retracted. The fixed fulcrum position 305a of the long hole 305 of 301 leaves the moving fulcrum region 305b. Therefore, the distal end portion 302 of the pull-in lever 301 draws an elliptical trajectory. Thereafter, when the insertion of the small-diameter disk 1b proceeds and the second protrusion 304 reaches the first area 403a and moves along the first area 403a, the first area 403a is located on the circumference of the circle centered on the protrusion 402. Accordingly, the protrusion 402 of the rear base 401 does not move from the fixed fulcrum position 305 a of the elongated hole 305 of the pull-in lever 301. In the disk insertion completion position in FIG. 7, the pull-in lever 301 rotates to the position closest to the spindle motor 31, and the second protrusion 304 reaches a point located near the end 403 c of the second long hole 403.

  Next, the movement of each member when a large-diameter disk (diameter 12 cm) is inserted will be described with reference to FIGS. The overall configuration of the optical disc apparatus is the same as that shown in FIG.

  As shown in FIG. 1, in a state where the large-diameter disk 1a is not inserted, the pull-in guide lever 201 and the pull-in lever 301 stand by in a state where they are rotated by a certain angle toward the spindle motor 31 side. In this state, the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is narrower than the diameter of the large-diameter disk 1a.

  In the initial stage when the large-diameter disk 1 a is inserted, the position of the large-diameter disk 1 a is first regulated by the pull-in guide 201 and the pull-in lever 301. When the large-diameter disk 1a is further pushed in, the pull-in guide lever 201 and the pull-in lever 301 pivot in a direction away from the spindle motor 31 along with the insertion operation.

  FIG. 9 is a plan view showing the relationship between the pull-in lever and the rear base at the initial stage when the large-diameter disk is inserted, and shows the same state as that shown in FIG. 9, 1a is a large-diameter disk, 301 is a pull-in lever, 302 is a tip, 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first region, 403b is a second region, and 403c is an end.

  The pull-in lever 301 is rotatably held by a rear base 401 fixed to the base body 10. The rear base 401 has a protrusion 402, and the pull-in lever 301 has a second protrusion 304. The pull-in lever 301 has a long hole 305 that engages with the protrusion 402, and the rear base 401 has a second long hole 403 that engages with the second protrusion 304. The pull-in lever 301 is rotatably held by a rear base 401 fixed to the base body 10, and a pivot point of the pull-in lever 301 that guides the large-diameter disk 1 a into the chassis is a protrusion 402 of the rear base 401.

  The protrusion 402 of the rear base 401 has a cylindrical shape, and the side surface of the protrusion 402 moves along the elongated hole 305 of the pull-in lever 301. Thus, the rotation fulcrum of the drawing lever 301 is configured to move. Further, the second protrusion 304 of the pull-in lever 301 has a cylindrical shape like the protrusion 402, and the side surface of the second protrusion 304 moves along the second long hole 403 of the rear base 401.

  When the inserted large-diameter disk 1a abuts on a third disk guide 303 provided at the movable end portion 302 of the pull-in lever 301 and rotates the third disk guide 303, the rear base 401 is rotated according to the amount of rotation. The second protrusion 304 of the pull-in lever 301 moves inside the second long hole 403. Corresponding to the movement of the second protrusion 304, the engagement position of the protrusion 402 of the rear base 401 and the elongated hole 305 of the pull-in lever 301 changes.

  The long hole 305 includes a fixed fulcrum position 305 a where the rotation fulcrum of the pull-in lever 301 is fixed, and a movement fulcrum region 305 b where the rotation fulcrum of the pull-in lever 301 moves according to the rotation angle of the pull-in lever 301. ing. As described above, the pivot fulcrum of the pull-in lever 301 is the protrusion 402 provided on the rear base 401, and the protrusion with respect to the long hole 305 is configured to be movable along the long hole 305 provided in the pull-in lever 301. Since the engagement position of 402 is changed, a fixed fulcrum position 305 a where the rotation fulcrum of the pull-in lever 301 is fixed, and a movement fulcrum region where the rotation fulcrum of the pull-in lever 301 moves according to the rotation angle of the pull-in lever 301. 305b can be realized with an easy configuration.

  The second elongated hole 403 includes a first region 403a in which the second protrusion 304 of the pull-in lever 301 moves along the circumference of a circle centered on the protrusion 402 of the rear base 401, and the pull-in lever 301 exceeds a predetermined angle. The second region 403b is configured such that the second protrusion 304 moves along a linear groove different from the circumference of the circle centered on the protrusion 402 when rotated. Then, the protrusion 402 moves the long hole 305 by moving the second protrusion 304 from the first region 403a to the second region 403b of the second long hole 403 when the pulling lever 301 rotates beyond a predetermined angle. It is configured to rotate while moving the rotation fulcrum along the fulcrum area 305b. Thereby, when the rotation angle of the pull-in lever 301 is larger than the predetermined angle, the projection 402 rotates while moving the rotation fulcrum along the movement fulcrum region of the long hole 305, so that the small diameter disk 1b or the large diameter The retracted position of the leading end 302 of the pulling lever 301 during rotation of the large-diameter disk 1a can be set to the optimum position without being affected by the standby position of the leading end 302 of the pulling lever 301 that waits for the insertion of the disk 1a.

  FIG. 10 is a plan view of the base main body of the optical disk apparatus according to Embodiment 1 of the present invention, showing the first half of the middle stage of inserting the large-diameter disk. FIG. 11 is a plan view showing the relationship between the pull-in lever and the rear base in the first half of the stage of inserting the large-diameter disc, and shows the same state as that shown in FIG. 10 and 11, 1a is a large-diameter disk, 31 is a spindle motor, 60 is a loading motor, 80 is a large-diameter pull-in lever, 81 is a second disk guide, 100 is a discharge lever, 101 is a fourth disk guide, 110 Is a regulating lever, 112 is a sixth disc guide, 180 is a set guide lever, 182 is a fifth disc guide, 201 is a retracting guide lever, 203 is a first disc guide, 301 is a retracting lever, 302 is a tip portion, and 303 is a first portion. 3 disc guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first area, and 403b is The second region, 403c is an end.

  During the period from the initial stage of inserting the disk shown in FIG. 1 to the first half of the stage of inserting the large-diameter disk shown in FIG. 10, that is, in the range where the retracting lever 301 rotates within a predetermined angle, the second protrusion 304 of the retracting lever 301 is The second elongated hole 403 moves from the end 403c of the first region 403a toward the second region 403b. At this time, since the first region 403a is formed along the circumference of a circle centered on the protrusion 402 of the rear base 401, the protrusion 402 of the rear base 401 moves from the fixed fulcrum position 305a of the elongated hole 305 of the pull-in lever 301. do not do. Therefore, the rotation trajectory of the distal end portion 301 of the pull-in lever 301 is a circular trajectory.

  FIG. 12 is a plan view of the base main body of the optical disc apparatus according to Embodiment 1 of the present invention, showing a state in the latter half of the stage of inserting the large-diameter disc. FIG. 13 is a plan view showing the relationship between the pull-in lever and the rear base in the latter half of the stage of inserting the large-diameter disc, and shows the same state as that shown in FIG. 12 and 13, 1a is a large diameter disk, 31 is a spindle motor, 60 is a loading motor, 80 is a large diameter pulling lever, 81 is a second disk guide, 100 is a discharge lever, 101 is a fourth disk guide, 110 Is a regulating lever, 112 is a sixth disc guide, 180 is a set guide lever, 182 is a fifth disc guide, 201 is a retracting guide lever, 203 is a first disc guide, 301 is a retracting lever, 302 is a tip portion, and 303 is a first portion. 3 disc guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first area, and 403b is The second region, 403c is an end.

  When the large-diameter disk 1a is further pushed in from the state shown in FIG. 10, the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is further increased. With this operation, the large-diameter disk 1 a is further drawn into the chassis, abuts on the sixth disk guide 112 of the restriction lever 110, the restriction lever 110 rotates, and the restriction lever 110 is separated from the spindle motor 31. By rotating a predetermined angle in the direction, a limit switch (not shown) is operated, and driving of the loading motor 60 is started. When the distance between the first disc guide 203 and the third disc guide 303 is the same as that of the large-diameter disc 1a, the first disc guide of the retracting guide lever 201 and the third disc guide 303 of the retracting lever 301 are supported. As shown in FIG. 12, the large-diameter disk 1 a has the sixth disk guide 112 of the restriction lever 110, the fifth disk guide 182 of the set guide lever 180, and the second disk guide 81 of the large-diameter pull-in lever 80. It is mainly supported by three guides, and is supplementarily supported by two guides: a fourth disk guide 101 of the discharge lever 100 and a third disk guide 303 of the pull-in lever 301.

  Thereafter, the pulling lever 301 is urged by a driving force of the loading motor 60 through a spring in a direction of turning to the spindle motor 31 side. Here, the pull-in lever 301 serves as a guide wall for smoothly pulling the large-diameter disk 1a into the chassis, and the large-diameter pull-in lever 80 rotates and the second disk guide 81 of the large-diameter pull-in lever 80 serves as the large-diameter disk. By pushing 1a, the large-diameter disc 1a is pushed further away from the artificial operation.

  FIG. 14 is a plan view of the base main body of the optical disk apparatus according to Embodiment 1 of the present invention, and shows the stage of completing the large-diameter disk insertion. FIG. 15 is a view showing the relationship between the pull-in lever and the rear base at the stage of completing the large-diameter disc insertion, and shows the same state as that shown in FIG. 14 and 15, 1a is a large diameter disk, 10b is a shallow bottom part, 31 is a spindle motor, 60 is a loading motor, 80 is a large diameter pulling lever, 81 is a second disk guide, 100 is a discharge lever, and 101 is a first lever. 4-disc guide, 110 is a regulating lever, 112 is a sixth disc guide, 180 is a set guide lever, 182 is a fifth disc guide, 201 is a retracting guide lever, 203 is a first disc guide, 301 is a retracting lever, and 302 is a tip. , 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum position, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, and 403a is a second hole. One region, 403b is a second region, and 403c is an end.

  The large-diameter disk 1a is mainly supported by three guides: a sixth disk guide 112 of the regulating lever 110, a fifth disk guide 182 of the set guide lever 180, and a second disk guide 81 of the large-diameter pull-in lever 80. The center hole moves to a position corresponding to the rotary table 31a and is regulated at that position.

  Then, the operation of the traverse 30 is started from the state shown in FIG. That is, the traverse 30 starts to move in a direction in which the spindle motor 31 side approaches the lid body 130. In a state where the spindle motor 31 side is operated in the direction closest to the lid 130, the large-diameter disk 1 a comes into contact with the lid 130 and is pressed by the spindle motor 31 and the lid 130. With this pressing force, the hub of the spindle motor 31 is fitted into the center hole of the large-diameter disk 1a, and the chucking is completed. When the chucking is completed, the traverse 30 operates in a direction in which the spindle motor 31 side is separated from the lid body 130. This operation is further performed by driving the loading motor 60.

  FIG. 16 is a plan view of the base main body of the optical disc apparatus according to Embodiment 1 of the present invention, showing the stage of completing loading of the large-diameter disc. FIG. 17 is a view showing the relationship between the pull-in lever and the rear base at the stage of completing loading of the large-diameter disc, and shows the same state as that shown in FIG. 16 and 17, 1a is a large-diameter disk, 10b is a shallow bottom part, 31 is a spindle motor, 60 is a loading motor, 80 is a large-diameter pulling lever, 81 is a second disk guide, 100 is a discharge lever, and 101 is a first lever. 4-disc guide, 110 is a regulating lever, 112 is a sixth disc guide, 180 is a set guide lever, 182 is a fifth disc guide, 201 is a retracting guide lever, 203 is a first disc guide, 301 is a retracting lever, and 302 is a tip. , 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum position, 401 is a rear base, 402 is a protrusion, 403 is a second long hole, and 403a is a second hole. One region, 403b is a second region, and 403c is an end.

  When the chucking of the large-diameter disk 1a is completed, the fifth disk guide 182 of the set guide lever 180 supporting the large-diameter disk 1a, the sixth disk guide 112 of the regulating lever 110, and the third disk of the retracting lever 301 are completed. The guide 303, the second disk guide 81 of the large-diameter pull-in lever 80, and the fourth disk guide 101 of the discharge lever 100 move outward in the radial direction of the large-diameter disk 1a. As a result, the fifth disk guide 182, the sixth disk guide 112, the third disk guide 303, the second disk guide 81, and the fourth disk guide 101 are separated from the large-diameter disk 1a by a certain distance. The large-diameter disk 1a does not interfere with the rotation.

  Here, the moving fulcrum region 305b of the long hole 305 is provided with a tapered relief at the end of the projection 402 moving in the moving fulcrum region 305b, and when the retracting lever 301 is rotated to the maximum, The width of the groove where the protrusion 402 is located is larger than the groove width of the fixed fulcrum position 305a. As a result, when the retracting lever 301 rotates to the maximum and the leading end 302 of the retracting lever 301 moves to the retracted position, the leading end 302 of the retracting lever 301 comes into contact with the inner wall of the chassis. Even in the case where a load is generated in the engaging portion between the long hole 305 of the pull-in lever 402 and the pull-in lever 301, the end opposite to the tip 302 of the pull-in lever 301 is within the groove width of the moving fulcrum region 305b. Since the load is released by the movement, an excessive load is not applied between the protrusion 402 of the rear base 401 and the long hole 305 of the pull-in lever 301. As a result, an excessive load is not applied between the protrusion 402 of the rear base 401 and the elongated hole 305 of the pull-in lever 301. Therefore, the rear base 401 is caused by the tip 302 of the pull-in lever 301 contacting the inner wall of the chassis. The projection 402 and the elongated hole 305 of the pull-in lever 301 are not damaged.

  From the first half of the large diameter disk insertion stage shown in FIG. 10 to the second half of the large diameter disk insertion stage shown in FIG. 12, through the large diameter disk insertion completion stage shown in FIG. 14, to the large diameter disk loading completion stage shown in FIG. In the interval, that is, in a range in which the retracting lever 301 rotates beyond a predetermined angle, the second protrusion 304 of the retracting lever 301 passes through the first region 403a of the second long hole 403 and then passes through the second region 403b. Moving. At this time, since the second region 403b is arranged so that the distance from the fixed fulcrum position 305a of the elongated hole 305 becomes closer as the distance from the first region 403a increases, the protrusion 402 moves in the moving fulcrum region 305b. Move away from 305a. Therefore, the rotation locus of the leading end 302 of the pulling lever 301 changes from a circular orbit to an elliptical orbit while the pivoting fulcrum of the pulling lever 301 is displaced away from the leading end 302 of the pulling lever 301.

  From the large-diameter disk insertion initial stage shown in FIG. 1 to the large-diameter disk insertion intermediate stage shown in FIG. 12 and the large-diameter disk insertion intermediate stage shown in FIG. Meanwhile, the second protrusion 304 moves in the second region 403b of the second long hole 403 after moving in the first region 403a of the second long hole 403, and the protrusion 402 when the second protrusion 304 moves in the first region 403a. Is located at the fixed fulcrum position 305a, and when the second protrusion 304 moves in the second area 403b, the protrusion 402 is positioned in the movement fulcrum area 305b, so that the leading end 302 of the pull-in lever 301 that contacts the large-diameter disk 1a is located. Since the rotation trajectory is changed from a circular trajectory to an elliptical trajectory, the tip of the pull-in lever 301 that waits for insertion of the small-diameter disk 1b or the large-diameter disk 1a with an easy configuration. Part 302 of the retracted position and when the large-diameter disk rotating pulling lever 301 and a retracted position of the distal end portion 302, respectively can be the optimum position.

  When the second protrusion 304 moves in the first region 403 a of the long hole 403, the trajectory along which the tip 302 of the pull-in lever 301 moves is a circular orbit, and the second protrusion 304 becomes the second region of the second long hole 403. When moving 403b, the trajectory along which the distal end 302 of the pull-in lever 301 moves is an elliptical trajectory, so that the pivotal trajectory of the pull-in lever 301 abutting against the large-diameter disk 1b is changed from a circular trajectory to an elliptical trajectory. Therefore, the retracting position of the leading end 302 of the retracting lever 301 that waits for insertion of the small-diameter disc 1b or the large-diameter disc 1a and the retracting of the leading end 302 of the retracting lever 301 when the large-diameter disc is rotated can be changed by simply changing the orbit of rotation. Each position can be set to the optimum position.

  FIG. 18 is a diagram showing a turning locus of the leading end of the retracting lever according to the first embodiment of the present invention, and the retracting lever shown by a broken line shows a state of the leading end changing with the turning. In FIG. 18, 301 is a pull-in lever, 302 is a tip, 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 401 is a rear base, 402 is a protrusion, and 403 is a second long hole.

  The leading end 302 of the pull-in lever 301 passes from the initial stage when the large-diameter disk 1a is inserted, through the first half of the large-diameter disk 1a insertion stage, through the latter half of the large-diameter disk 1a insertion stage, and until the large-diameter disk 1a insertion completion stage. The locus | trajectory of the dashed-two dotted line shown in FIG. 18 is drawn.

  Since the fixed fulcrum position 305a of the long hole 305 is fixed to the rotation fulcrum from the standby position of the pull-in lever 301 to the periphery of the large-diameter disk 1a and rotated by a predetermined angle, the tip of the pull-in lever 301 is rotated. The rotation trajectory of the unit 302 is a circular trajectory. Thereafter, when the rotation angle of the pull-in lever 301 exceeds a predetermined angle, the pulling lever 301 rotates while moving the rotation fulcrum along the movement fulcrum region 305b. . Therefore, the locus of the two-dot chain line shown in FIG. 18, that is, the turning locus of the tip 302 of the pull-in lever 301 initially draws a circular orbit and then draws an elliptical orbit.

  As described above, the fulcrum of the pull-in lever 301 moves between the fixed fulcrum position 305 a where the rotation fulcrum is fixed and the moving fulcrum region 305 b where the rotation fulcrum moves according to the rotation angle of the pull-in lever 301. The fixed fulcrum position 305a is fixed to the rotation fulcrum until it rotates a predetermined angle from the standby position of the pull-in lever 301 until it comes into contact with the periphery of the disk and moves beyond the predetermined angle. , While rotating the rotation fulcrum along the axis, the rotation trajectory of the tip portion 302 of the pull-in lever 301 that contacts the optical disk is changed from a circular orbit to an elliptical orbit on the way. The combination of the amount of movement by the elliptical orbit and the front end 302 of the pull-in lever 301 that waits for insertion of the small-diameter disk 1b or the large-diameter disk 1a. And aircraft position, the retracted position can be set independently, can the retracted position and the standby position of the distal end portion 302 to the optimum position respectively. As a result, even in the case of the pull-in lever 301 capable of pulling in two types of disks having different diameters, the standby position and the retracted position of the tip end portion 302 are set to the optimum positions, thereby improving the accuracy of guiding each disk. In addition, it is possible to realize an optical disc apparatus that reliably prevents the leading end 302 of the pull-in lever 301 from coming into contact with the large-diameter disc 1a when the large-diameter disc 1a rotates.

  Further, since the turning trajectory of the leading end 302 of the pulling lever 301 in contact with the optical disk is changed from a circular orbit to an elliptical orbit on the way, it is close to the pulling lever 301 by a combination of the movement amount by the circular orbit and the movement amount by the elliptic orbit. In consideration of the interference with the parts to be moved and the interference with the chassis, the trajectory along which the tip 302 of the pull-in lever 301 moves can be determined freely, and an optical disc apparatus that can be reduced in thickness and size can be realized.

  In the first embodiment, the first disk to be mounted on the optical disk apparatus has been described as a small disk having a diameter of 8 cm and the second disk has a large diameter disk 1a having a diameter of 12 cm. However, the first disk and the second disk are limited to this. However, at least two types of discs having different diameters may be used.

(Embodiment 2)
In the second embodiment, a case where the projection 402 of the rear base 401 does not move from the fixed fulcrum position 305a of the elongated hole 305 of the pull-in lever 301 when a small-diameter disk (diameter 8 cm) is inserted will be described with reference to the drawings.

  The overall configuration of the optical disc apparatus according to the second embodiment is the same as that of the first embodiment shown in FIG. In the second embodiment, the small-diameter disc insertion stage shown in FIGS. 5 and 6 is replaced with the small-diameter disc insertion stage shown in FIG. In the second embodiment, the turntable corresponds to the turntable 31a, the lever corresponds to the pull-in lever 301, and the base corresponds to the rear base 401.

  FIG. 19 is a plan view showing the relationship between the pull-in lever and the rear base in the middle stage of inserting the small-diameter disk according to Embodiment 2 of the present invention. In FIG. 19, 1b is a small-diameter disk, 301 is a retracting lever, 302 is a tip, 303 is a third disk guide, 304 is a second protrusion, 305 is a long hole, 305a is a fixed fulcrum position, 305b is a moving fulcrum area, 401 Is a rear base, 402 is a protrusion, 403 is a second long hole, 403a is a first region, 403b is a second region, and 403c is an end.

  The second protrusion 304 of the pull-in lever 301 is the end of the first region 403a of the second long hole 403 from the initial stage when the small diameter disk 1b shown in FIG. 4 is inserted to the middle stage of insertion of the small diameter disk 1b shown in FIG. It moves from 403c toward the second area 403b, and stops immediately before entering the second area 403b. Thereafter, the second protrusion 304 changes its moving direction and starts moving toward one end of the first region 403a. At this time, since the first region 403a is formed along the circumference of a circle centered on the protrusion 402 of the rear base 401, the protrusion 402 of the rear base 401 moves from the fixed fulcrum position 305a of the elongated hole 305 of the pull-in lever 301. do not do. Therefore, the rotation trajectory of the distal end portion 301 of the pull-in lever 301 is a circular trajectory.

  Here, the position at which the second protrusion 304 temporarily stops after the movement starts is such that the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is substantially the same as the diameter of the small-diameter disk 1b. When it is.

  When the small-diameter disk 1 b is further inserted from the state shown in FIG. 4, one end side of the disk is supported by the pull-in guide lever 201, and the other end side is supported by the pull-in lever 301. It is in a separated state. In this state, the distance between the first disk guide 203 of the pull-in guide lever 201 and the third disk guide 303 of the pull-in lever 301 is the same as the diameter of the small-diameter disk 1b.

  From this point, when the small-diameter disk 1b is further pushed in, the third disk guide 303 of the pull-in lever 301 starts to move in the direction closer to the spindle motor 31 along with this insertion operation. With this operation, the small-diameter disk 1b is further drawn into the chassis, contacts the fourth disk guide 101 of the discharge lever 100, the discharge lever 100 rotates, and the discharge lever 100 approaches the spindle motor 31. By rotating a predetermined angle, a limit switch (not shown) is operated, and driving of the loading motor 60 is started. At this time, the small-diameter disk 1 b is supported at three points: the first disk guide 203 of the pull-in guide lever 201, the third disk guide 303 of the pull-in lever 301, and the fourth disk guide 101 of the discharge lever 100.

  When the driving of the loading motor 60 is started, the pulling lever 301 is urged through the cam mechanism in the direction of turning to the spindle motor 31 side. Accordingly, the pull-in lever 301 biases the small-diameter disk 1b in the direction of pulling it into the chassis. Due to the urging force of the pull-in lever 301, the small-diameter disk 1b is released from an artificial operation and further pushed.

  As can be seen from FIGS. 4, 19, and 8, when the small-diameter disk 1 b is guided by the pull-in lever 301, that is, from the initial insertion stage to the insertion completion stage, the second protrusion 304 has the second elongated hole 403. Only the first region 403a is moved, and the protrusion 402 continues to be positioned at the fixed fulcrum position 305a. Thereby, when guiding the small-diameter disk 1b with the pull-in lever 301, the protrusion 402 which is a rotation fulcrum stays at the same position of the elongated hole 305, and the pull-in lever 301 is not subjected to linear motion but only rotational motion. There is no loss in the force that guides the small-diameter disk 1b while the tip of the pull-in lever 301 contacts the periphery of the small-diameter disk 1b.

  As described above, the fulcrum of the pull-in lever 301 moves between the fixed fulcrum position 305 a where the rotation fulcrum is fixed and the moving fulcrum region 305 b where the rotation fulcrum moves according to the rotation angle of the pull-in lever 301. The fixed fulcrum position 305a is fixed to the rotation fulcrum until it rotates a predetermined angle from the standby position of the pull-in lever 301 until it comes into contact with the periphery of the disk and moves beyond the predetermined angle. , While rotating the rotation fulcrum along the axis, the rotation trajectory of the leading end 302 of the pull-in lever 301 contacting the optical disk is changed from a circular orbit to an elliptical orbit on the way. The combination of the amount of movement by the elliptical orbit and the front end 302 of the pull-in lever 301 that waits for insertion of the small-diameter disk 1b or the large-diameter disk 1a. And aircraft position, the retracted position can be set independently, can the retracted position and the standby position of the distal end portion 302 to the optimum position respectively. As a result, even in the case of the pull-in lever 301 capable of pulling in two types of disks having different diameters, the standby position and the retracted position of the tip end portion 302 are set to the optimum positions, thereby improving the accuracy of guiding each disk. In addition, it is possible to realize an optical disk apparatus that reliably prevents the leading end 302 of the pull-in lever 301 from coming into contact with the large diameter disk 1a when the large diameter disk 1a rotates.

  Further, since the turning trajectory of the leading end 302 of the pulling lever 301 in contact with the optical disk is changed from a circular orbit to an elliptical orbit on the way, it is close to the pulling lever 301 by a combination of the movement amount by the circular orbit and the movement amount by the elliptic orbit. In consideration of the interference with the parts to be moved and the interference with the chassis, the trajectory along which the tip 302 of the pull-in lever 301 moves can be determined freely, and an optical disc apparatus that can be reduced in thickness and size can be realized.

  In the second embodiment, the first disk to be mounted on the optical disk apparatus has been described as a small disk 1b having a diameter of 8 cm, and the second disk has a large disk 1a having a diameter of 12 cm. It is not limited, and at least two types of discs having different diameters may be used.

  The present invention improves the accuracy of guiding each disk even if the lever can guide two types of disks having different diameters into the chassis, and the leading end of the pull-in lever contacts the disk when the disk rotates. Therefore, the present invention can be applied to a slot-in type optical disc apparatus in which an optical disc can be directly inserted or ejected from the outside.

FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the lid of the optical disc device according to the first embodiment of the present invention. The front view of the bezel with which the front surface of the chassis exterior in Embodiment 1 of this invention is mounted | worn Plan view showing the relationship between the pull-in lever and the rear base in the initial stage when inserting a small-diameter disc FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. Plan view showing the relationship between the pull-in lever and the rear base in the middle of inserting a small-diameter disk FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. Plan view showing the relationship between the pull-in lever and the rear base at the stage where the small-diameter disc has been inserted Plan view showing the relationship between the pull-in lever and the rear base at the initial stage when inserting a large-diameter disc FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. Plan view showing the relationship between the pull-in lever and the rear base in the first half of the large-diameter disc insertion stage It is a top view of the base main body of the optical disk apparatus in Embodiment 1 of this invention, and is a figure which shows the state of the latter half stage of a large diameter disk insertion stage Plan view showing the relationship between the pull-in lever and the rear base in the latter half of the stage of inserting the large-diameter disc FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. Diagram showing the relationship between the pull-in lever and the rear base when the large-diameter disc is inserted FIG. 3 is a plan view of the base body of the optical disc apparatus according to Embodiment 1 of the present invention. Diagram showing the relationship between the pull-in lever and the rear base when the large-diameter disc is loaded The figure which shows the rotation locus | trajectory of the retracting lever front-end | tip part in Embodiment 1 of this invention. The top view which shows the relationship between the drawing lever in the middle stage of small diameter disc insertion in Embodiment 2 of this invention, and a rear base

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Large diameter disk 1b Small diameter disk 10 Base main body 10a Deep bottom part 10b Shallow bottom part 11 Disk insertion slot 12 Connector 30 Traverse 31 Spindle motor 31a Rotary table 32 Pickup 33 Drive motor 40 Main slider 60 Loading motor 80 Large diameter pull-in lever 81 2nd disk Guide 90 Sub-lever 92 Rotating fulcrum 100 Ejecting lever 101 Fourth disc guide 102 Rotating fulcrum 103 Abutting portion 110 Regulating lever 111 Rotating fulcrum 112 Sixth disc guide 130 Lid 140 Bezel 180 Set guide lever 181 Rotating fulcrum 182 First 5 disc guide 201 retracting guide lever 202 tip 203 first disc guide 301 retracting lever 302 tip 303 third disc guide 3 4 second projection 305 elongated hole 305a fixed support position 305b moves the fulcrum region 401 rear base 402 projections 403 second long hole 403a first region 403b second region 403c end 501 wire

Claims (11)

A rotary table for holding a first disk and a second disk having a different diameter from the first disk;
A lever for guiding the disk on the rotary table while rotating in contact with the periphery of the disk to be inserted;
The lever fulcrum is movable between a fixed fulcrum position where the pivot fulcrum is fixed and a moving fulcrum area where the pivot fulcrum moves according to the pivot angle of the lever, and the lever is on standby. The fixed fulcrum position is fixed to the rotation fulcrum until it contacts the periphery of the disk and rotates by a predetermined angle from the position, and when the predetermined angle is exceeded, the rotation fulcrum is moved along the moving fulcrum region. An optical disc apparatus characterized by rotating while being moved. A base for holding the fulcrum of the lever is provided,
2. The optical disc apparatus according to claim 1, wherein the fulcrum of the lever is a protrusion provided on the base and is movable along a long hole provided in the lever. The lever is provided with a second protrusion, and the base is provided with a second long hole,
The first region where the second protrusion moves along the circumference of a circle centered on the protrusion, and the circumference of the circle centered on the protrusion when the lever rotates beyond the predetermined angle A second region in which the second protrusion moves along a linear groove,
When the lever rotates beyond the predetermined angle, the protrusion moves along the moving fulcrum region of the long hole by moving the second protrusion from the first region to the second region of the second long hole. 3. The optical disk apparatus according to claim 2, wherein the optical disk apparatus rotates while moving the rotation fulcrum. 4. The optical disc apparatus according to claim 3, wherein the second area of the second long hole is arranged so that the distance from the fixed fulcrum position of the long hole becomes closer as the distance from the first area increases. When guiding the first disk with the lever,
4. The optical disc apparatus according to claim 3, wherein the second protrusion moves only in the first region of the second elongated hole, and the protrusion continues to be positioned at the fixed fulcrum position. When guiding the second disc with the lever,
The second protrusion moves in the second region of the second slot after moving in the first region of the second slot,
When the second protrusion moves in the first region of the second slot, the protrusion is located at the fixed fulcrum position;
4. The optical disk apparatus according to claim 3, wherein when the second protrusion moves in the second area of the second long hole, the protrusion is positioned in the movement fulcrum area. When the second protrusion moves in the first region of the second long hole, a trajectory along which the tip of the lever moves is a circular trajectory,
7. The optical disc apparatus according to claim 6, wherein when the second protrusion moves in the second region of the second long hole, the trajectory along which the tip of the lever moves is an elliptical trajectory. The pivot fulcrum of the lever is positioned on the rotary table side from a line connecting the end of the lever with which the first disk contacts and the center of the first disk immediately before the lever contacts with the first disk. 4. The optical disk apparatus according to claim 3, wherein 4. The optical disk apparatus according to claim 3, wherein the protrusion and the second protrusion have a cylindrical shape, and the side surfaces of the columnar shape move along the long hole and the second long hole, respectively.   4. The optical disk apparatus according to claim 3, wherein when the lever is rotated to the maximum, the groove width of the moving fulcrum area where the protrusion is located is larger than the groove width of the fixed fulcrum position. 11. The optical disc apparatus according to claim 1, wherein the first disc has a diameter of 8 cm, and the second disc has a diameter of 12 cm.

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