WO2007037480A1

WO2007037480A1 - Disk drive

Info

Publication number: WO2007037480A1
Application number: PCT/JP2006/319709
Authority: WO
Inventors: Ken Okamura; Hiroshi Yokota; Akira Takahashi; Yasuyuki Noboribayashi
Original assignee: Pioneer Corporation
Priority date: 2005-09-30
Filing date: 2006-10-02
Publication date: 2007-04-05
Also published as: JP2007102883A

Abstract

A pivotal movement of a loading arm (21) is converted into a linear movement in the left-right direction of a rack plate (31), and differences between positions of the rack plate (31) caused by optical disk diameters are detected by two switches (71, 72). A motor (65) is controlled, based on the result of the detection, for a plurality of kinds of optical disks with different diameters, and the control is made for the timing of the start of loading, the position of stop of an optical disk when ejection is completed, the timing of the start of reloading, etc.

Description

Specification

Disk drive

Technical field

The present invention relates to a disk drive such as a DVD drive or a CD (Compact Disc) drive. More specifically, the present invention relates to a disk transport mechanism of a slot-in type disk drive.

Background art

[0002] Disc drives that read or record information on optical discs such as DVDs, CDs, Blu-ray discs, and magnetic discs are various devices such as disc players, disc recorders, audio systems, personal computers, and car navigation systems. It is used for.

[0003] There are two types of disk drives: a type in which an optical disk can be attached and detached like a general optical disk drive, and a type in which an optical disk cannot be attached and detached like a general hard disk drive. In addition, the types of disk drives that can be loaded and unloaded with an optical disk include a slot-in system, a drawer-type system, a tray system, and the like regarding the optical disk mounting / unloading system.

[0004] A slot-in type disk drive includes a pair of loading arms, a pair of rollers attached to the leading ends of the loading arms, and a motor that rotates each roller. Some optical disks are transported by rotating a roller while holding the periphery of the optical disk.

[0005] The loading operation of this type of disk drive is, for example, as follows.

When the user inserts the optical disc into the disc slot, the periphery of the optical disc contacts the roller, which pushes the loading arm, causing the loading arm to rotate slightly. This triggers the motor to start and the rollers start rotating. Then, the optical disk is drawn into the disk drive by the rotation of the roller. As the optical disc is pulled in, the loading arm rotates further and the loading arm opens. The optical disk reaches the clamp position on the turntable, and the optical disk clamp When complete, the motor stops and the rollers stop rotating.

[0006] The ejection operation of this type of disk drive is, for example, as follows. When an instruction to eject (eject) the optical disk clamped in the disk drive is issued, the motor starts, the clamp is released, and the eject arm and loading arm come into contact with the periphery of the optical disk. The eject arm then pushes the optical disc toward the disk slot, and the roller begins to rotate. Then, the optical disk is conveyed outward through the disk slot by the rotation of the roller. As the optical disk is transported, the loading arm rotates and the loading arm closes. When the optical disk reaches the appropriate stop position near the disk slot, the motor stops and the roller stops rotating. As a result, the optical disk stops at an appropriate position near the disk slot.

Disclosure of the invention

Problems to be solved by the invention

[0007] By the way, when a plurality of types of optical disks having different diameters are handled in one disk drive, the structure for controlling the optical disk transport may be complicated.

[0008] That is, in order to perform the optical disk transport control, it is necessary to detect the position of the optical disk and determine the start and stop timings of the optical disk transport. As a method for detecting the position of the optical disk, for example, a method may be considered in which a sensor is provided in the vicinity of the optical disc conveyance path to detect whether or not the optical disc has passed.

However, when the diameter of the optical disc is different, the size of the area through which the optical disc passes through the transport path is different. That is, a small-diameter optical disk passes only through the area near the center of the transport path, whereas a large-diameter optical disk passes through the entire transport path. For this reason, in order to detect the position of each of the optical disks having different diameters, it may be necessary to arrange several sensors at different locations in the disk drive. If separate sensors are required for transport start control and transport stop control, the number of sensors will increase further, and it may be necessary to place many sensors around the disk drive. . In addition, when the number of sensors increases, connect to sensors The number of signal lines increases and the wiring layout becomes complicated.

[0010] As the structure for carrying the optical disk becomes complicated, the disk drive becomes smaller

Therefore, it becomes difficult to reduce the thickness, the weight, or the manufacturing cost.

[0011] The present invention has been made in view of the problems exemplified above, and the problem of the present invention is

Another object of the present invention is to provide a disk drive capable of realizing transport control of a plurality of types of optical disks having different diameters with a simple structure.

Means for solving the problem

[0012] In order to solve the above problems, the disk drive of the present invention is a disk drive that reads or records information on a plurality of types of optical disks having different diameters, and is rotatable to a substrate and the substrate. A pair of arms for holding the periphery of the optical disk and transporting the optical disk, a first moving member supported by the substrate so as to be movable in the left-right direction, and rotation of the arm. A movement converting mechanism for converting the first moving member to move in the left-right direction; and a position detecting means for detecting a position in the left-right direction of the first moving member. First detection means for detecting whether or not the position is a first reference position, and second detection means for detecting whether or not the position of the first moving member is a second reference position.

[0013] These effects and other advantages of the present invention will become apparent from the embodiments described below.

Brief Description of Drawings

FIG. 1 is a perspective view showing an embodiment of a disk drive of the present invention.

2 is a plan view showing the inside of the disk drive in FIG. 1. FIG.

FIG. 3 is a plan view showing the inside of the disk drive when a small-diameter optical disk is inserted.

FIG. 4 is a plan view showing the inside of a disk drive when a small-diameter optical disk is conveyed to a clamp position.

FIG. 5 is a plan view showing the inside of a disk drive when a small-diameter optical disk is clamped.

[Fig.6] Inside of the disk drive when stopped at the small-diameter optical disk force ejection completion position FIG.

FIG. 7 is a plan view showing the inside of the disc drive when a large-diameter optical disc is inserted.

FIG. 8 is a plan view showing the inside of the disk drive during the conveyance of a large-diameter optical disk.

FIG. 9 is a plan view showing the inside of the disc drive when a large-diameter optical disc is conveyed to the clamp position.

FIG. 10 is a plan view showing the inside of the disk drive when a large-diameter optical disk is clamped.

FIG. 11 is a plan view showing the inside of the disk drive when stopped at the position where the large-diameter optical disk force S ejection is completed.

FIG. 12 is an explanatory view schematically showing a rack plate and two switches.

FIG. 13 is a waveform diagram showing signal waveforms in a disc drive control circuit when a small-diameter optical disc is inserted.

FIG. 14 is a waveform diagram showing signal waveforms in the control circuit of the disk drive when a large-diameter optical disk is inserted.

Explanation of symbols

10 Disk drive

11 Chassis

21 Loading arm

23 Roller

24 gear

25 pion

31 Rack plate

31A rack

69 Switch unit

71 1st switch

72 2nd switch 73 3rd switch

65 motor

75 Control circuit

76 Disk identification circuit

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described in each embodiment in order with reference to the drawings.

[0017] (Overall configuration and operation of disk drive)

FIG. 1 shows an embodiment of a disk drive of the present invention. A disc drive 10 in FIG. 1 is a device that reads or records information on an optical disc such as a DVD, CD, or Blu-ray disc. The disk drive 10 is a type in which an optical disk can be attached and detached, and a slot-in system is adopted as an optical disk attachment / detachment system.

[0018] The disk drive 10 can read or record information on a plurality of types of optical disks having different diameters. For example, information can be read or recorded on both an optical disc 1 having a diameter of 8 cm (see FIG. 2) and an optical disc 2 having a diameter of 12 cm (see FIG. 7).

As shown in FIG. 1, the outer shell of the disk drive 10 includes a chassis 11 and a front cover 1

It consists of two.

The chassis 11 is made of, for example, a metal material, has a bottom plate, and has side plates and a ceiling plate as necessary.

[0021] The front cover 12 is made of a resin material, for example. A disk slot 13 is formed in the front cover 12. The disk slot 13 is a groove through which the optical disk passes when the optical disk is loaded and ejected.

In the following description, the arrow X direction in FIG. 1 is referred to as the left-right direction, the arrow Y direction is referred to as the front-rear direction, and the arrow Z direction is referred to as the up-down direction.

FIG. 2 shows the inside of the disk drive 10. As shown in Figure 2, the disk drive

10 is a pair of loading arms 21, 21, rack plate 31, select plate 37, The jett arm 41, the trigger plate 46, the first shift bar 51, the second shift bar 55, the traverse mechanism 61, the motor 65, the pinion 66, the switch unit 69 and the control circuit 75 are provided.

The loading arms 21 and 21 are arranged symmetrically at positions near the disk slot 13 on the front side of the disk drive 10. Each loading arm 21 is rotatably supported on the chassis 11 via a support shaft 22. Each loading arm 21 is made of, for example, a resin material or a metal material.

[0025] A roller 23 is rotatably attached to the upper surface of the tip of each loading arm 21. Roller 23 is rotated by motor 65. The left roller 23 contacts the left edge of the optical disk. The right roller 23 contacts the right edge of the optical disc.

[0026] The loading arms 21 and 21 sandwich the optical disk via the rollers 23 and 23, and carry the optical disk. The loading arms 21 and 21 rotate as the optical disk moves forward or backward, thereby opening and closing the leading ends of the loading arms 21 and 21.

A gear 24 is fixed to the lower surface of the shaft portion of each loading arm 21. The left gear 24 meshes with the rack portion 31A on the left side of the rack plate 31 via the pinion 25. The right gear 24 is directly meshed with the rack portion 31B on the right side of the rack plate 31. The gear 24, the pinion 25, and the rack portions 31A and 31B convert the rotation of each loading arm 21 into the movement of the rack plate 31 in the left-right direction. Specifically, the rotation of each loading arm 21 when each loading arm 21 is opened is converted into the leftward movement of the rack plate 31, and each loading arm 21 when each loading arm 21 is closed. Is converted into a movement of the rack plate 31 in the right direction.

The rack plate 31 is located in the vicinity of the disk slot 13 on the front side of the disk drive 10 and is disposed between the chassis 11 and the loading arms 21 and 21. The rack plate 31 is supported by the chassis 11 so as to be movable in the left-right direction. The rack plate 31 is made of, for example, a metal material. The rack plate 31 is formed with a pair of rack portions 31 A and 3 IB.

Further, a switching edge 32 is formed at the right rear portion of the rack plate 31. The switching edge 32 extends linearly in the left-right direction. Left and right sides of rack plate 31 When the switching edge 32 moves in the left-right direction due to the movement in the direction, the presence / absence of contact between the switching edge 32 and the switching lever of the first switch 71 changes, and thereby the first switch 71 is switched on / off. Further, when the switching edge 32 moves in the left-right direction due to the movement of the rack plate 31 in the left-right direction, the presence / absence of the contact between the switching edge 32 and the switching lever of the second switch 72 changes. Off switches.

A select cam groove 33 is formed in the left rear portion of the rack plate 31. A select pin 38 of a select plate 37 is inserted into the select cam groove 33. In addition, two retraction control grooves, that is, a first retraction control groove 34 and a second retraction control groove 35 are formed on the left rear portion of the rack plate 31. When the rack plate 31 moves leftward and the first shift bar 51 moves forward, the retraction control pin 53 of the first shift bar 51 enters one of the retraction control grooves 34 and 35.

The select plate 37 is arranged on the left side of the disk drive 10. The select plate 37 is supported by a motor blanket (not shown) fixed to the chassis 11 so as to be movable in the front-rear direction. As a result, the select plate 37 can move forward and backward with respect to the chassis 11. The select plate 37 is made of, for example, a metal material. On the left side of the disk drive 10, several members overlap in the vertical direction. The select plate 37 is generally positioned below the rack plate 31, trigger plate 46 and second shift bar 55 and above the pinion 66.

A select pin 38 is provided on the upper surface on the front side of the select plate 37. One end of the select pin 38 extends upward, is inserted into the select cam groove 33 of the rack plate 31, and the other end is fixed to the select plate 37. The select pin 38 and the select cam groove 33 convert the movement of the rack plate 31 in the left-right direction into the movement of the select plate 37 in the front-rear direction. Specifically, the select pin 38 and the select cam groove 33 convert the leftward movement of the rack plate 31 into the rearward movement of the select plate 37 and the rightward movement of the rack plate 31 in front of the select plate 37. Convert to moving direction.

Further, a stopper 39 that restricts the rotation of the eject arm 41 is provided on the upper surface on the rear side of the select plate 37. One end of stopper 39 extends upward and the other end It is fixed on the upper surface of the Rectplate 37!

[0034] The eject arm 41 detects the completion of the drawing of the optical disk by contacting one end side of the optical disk at the time of loading, and pushes the optical disk forward by pressing the rear edge of the optical disk at the time of ejection. Move to. The ejector arm 41 is rotatably supported on the rear upper surface of the select plate 37. The eject arm 41 is made of, for example, a metal material or a resin material. The eject arm 41 rotates about the support shaft 42. The support shaft 42 of the eject arm 41 moves in the front-rear direction as the select plate 37 moves in the front-rear direction. A contact member 43 is attached to the upper surface of one end side of the eject arm 41. Contact member 43 contacts the periphery of the optical disc

A push control unit 44 is formed on the other end side of the eject arm 41. The push control unit 44 moves forward when the eject arm 41 rotates backward, and pushes the trigger pin 47 of the trigger plate 46, thereby pushing the trigger plate 46 forward.

The trigger plate 46 is positioned above the rear portion of the select plate 37 and is attached to a motor blanket (not shown) fixed to the chassis 11. The trigger plate 46 is made of, for example, a metal material. The trigger plate 46 can move back and forth with respect to the select plate 37 above the select plate 37. In addition, the trigger plate 46 is connected to an select arm 37 that is rotatably attached to a select plate 37 via a support shaft 42 via a coil spring 49. Therefore, the trigger plate 46 moves in the front-rear direction as the select plate 37 moves in the front-rear direction.

[0037] The trigger plate 46 is disposed so as to cover the select plate 37 and the eject arm 41. However, the rack portion 46A formed at the front right edge of the trigger plate 46 descends from the trigger plate 46 near the right edge of the select plate 37 and sinks below the select plate 37. The rack portion 46A engages with the pion 66 disposed below the select plate 37 when the trigger plate 46 advances.

A trigger pin 47 is provided on the rear lower surface of the trigger plate 46. One end of the trigger pin 47 extends downward, and the other end is fixed to the lower surface of the trigger plate 46. . One end of the trigger pin 47 extends to a position where it can come into contact with the push control unit 44 of the eject arm 41.

In addition, a first transmission pin 48 is provided at the front right edge of the trigger plate 46. One end side of the transmission pin 48 extends rightward and is inserted into the transmission groove 51A of the first shift bar 51. The other end of the transmission pin 48 is fixed to the right edge of the trigger plate 46.

A coil spring 49 is attached between the eject arm 41 and the trigger plate 46. The coil spring 49 pulls the other end side of the eject arm 41 forward.

[0041] The first shift bar 51 is supported on the chassis 11 so as to be movable in the front-rear direction. The shift bar 51 is formed of a resin material, for example, and is thicker than the rack plate 31 and the select plate 37, which are metal plates, for example.

A transmission groove 51 A is formed on the left side surface of the first shift bar 51. The transmission groove 51A extends substantially parallel to the chassis bottom plate in the front-rear direction. A transmission pin 48 of the trigger plate 46 is inserted into the transmission groove 51A. A second transmission pin 52 is provided on the front upper surface of the shift bar 51. One end side of the transmission pin 52 extends upward and is inserted into the transmission slot 55A of the second shift bar 55, and the other end side is fixed to the upper surface of the shift bar 51. A retraction control pin 53 is provided on the front upper surface of the first shift bar 51. One end side of the retraction control pin 53 extends upward to a position where it can come into contact with the retraction control grooves 34 and 35 of the rack plate 31, and the other end side is fixed to the upper surface of the shift bar 51. The retraction control pin 53 enters one of the retraction control grooves 34 and 35 of the rack plate 31 when the rack plate 31 moves leftward and the first shift bar 51 moves forward. The evacuation control pin 53 and the evacuation control grooves 34 and 35 further move the rack plate 31 moved to the left in the loading process further to the left during clamping.

[0043] The second shift bar 55 is supported on the chassis 11 so as to be movable in the left-right direction. The shift bar 55 is made of a resin material, for example, and is thicker than the rack plate 31 and the select plate 37 which are metal plates, for example.

[0044] A transmission slot 55A is formed at the left end of the second shift bar 55. The second transmission pin 52 of the first shift bar 51 is inserted into the transmission slot 55A. Further, a lifting groove 55B is formed on the rear side surface of the second shift bar 55. Elevating groove 55B is a shift bar 5 5 is a cam groove for moving the traverse mechanism 61 up and down by moving left and right. The right end is in the low position and the left end is in the high position. An elevating pin 64 attached to the traverse mechanism 61 is inserted into the elevating groove 55B.

In addition, a switching stick 56 is formed at the right end of the second shift bar 55. The switching stick 56 extends linearly in the left-right direction. When the switching stick 56 moves in the left-right direction due to the left / right movement of the shift bar 55, the presence / absence of contact between the switching stick 56 and the switching lever of the third switch 73 changes, and thereby the third switch 73 is switched on / off. .

[0046] The traverse mechanism 61 is provided with a turntable 62, an optical pickup 63, and the like. The motor 65 rotationally drives the pion 66 and also rotationally drives the roller 23 of each loading arm 21. The pinion 66 is disposed below the select plate 37. As described above, the select plate 37 and the trigger plate 46 move in the front-rear direction, but the axis of the pinion 66 does not move. The pinion 66 transmits the power of the motor 65 to the trigger plate 46 during the clamping operation, and moves the second shift bar 55, the first shift bar 51, the traverse mechanism 61, and the like.

[0047] The trigger plate 46, the first shift bar 51, the second shift bar 55, the lift pin 64, the motor 65, the pinion 66, the turntable 62, and the turntable 62 are positioned above the turntable 62 so as to face the turntable 62. The clamp mechanism is configured by a clamper (not shown) or the like provided on the slab.

[0048] The switch unit 69 is arranged on the right side of the disk drive 10. The switch 69 includes a switch board 70, a first switch 71, a second switch 72, a third switch 73, and wiring. The switches 71 to 73 and the wiring are provided on the switch substrate 70.

[0049] Each switch 71, 72, 73 is provided with a switching lever. Press the switch lever to turn on the switch. When you release the switch lever, the switch lever automatically rises and the switch turns off. The switching levers of the first switch 71 and the second switch 72 are pushed in when the switching edge 32 of the rack plate 31 contacts. That is, the first switch 71 and the second switch 72 are in contact with the switching edge 32. Depending on the presence or absence, it is switched on and off. On the other hand, the switching lever of the third switch 73 is pushed in when the switching stick 56 of the second shift bar 55 contacts. In other words, the third switch 73 is switched on and off depending on whether or not the switching stick 56 is in contact.

[0050] The control circuit 75 controls the driving of the motor 65 during loading, clamping and ejection based on the on / off state of the switches 71 to 73 and the like. Specifically, the control circuit 75 receives output signals output from the switches 71 to 73, respectively. Then, the control circuit 75 outputs a drive signal for driving the motor 65 to the motor 65.

Further, the control circuit 75 includes a disk identification circuit 76. The disc identification circuit 76 discriminates the type of the optical disc using the on / off state of the second switch 72 when the optical disc is at the clamp position. The disk identification circuit 76 outputs an identification signal indicating the result of identifying the type of optical disk. This identification signal is used in the control circuit 75 to drive the motor 65.

When the optical disk 1 having a diameter of 8 cm is inserted into the disk drive 10, the disk drive 10 operates as follows, for example.

As shown in FIG. 3, when the optical disc 1 is inserted into the disc drive 10, the periphery of the optical disc 1 contacts the roller 23 of each loading arm 21 and pushes each loading arm 21 backward. Thereby, each loading arm 21 is opened. When each loading arm 21 force S is opened, the rack plate 31 moves to the left by the engagement of the gear 24, the pinion 25, and the rack portions 31A and 31B. When the rack plate 31 moves, the switching edge 32 is separated from the switching lever of the first switch 71, and the first switch 71 is switched to the ON force OFF. In response to this, the control circuit 75 starts driving the motor 65. As a result, the roller 23 of each loading arm 21 starts rotating, and the optical disk 1 is drawn into the disk drive 10 by the rotation of the roller 23.

[0054] As the optical disk 1 is pulled in and the optical disk 1 is conveyed backward, each opening arm 21 is further opened, and the rack plate 31 is further moved leftward. Eventually, the rear edge force of the optical disc 1 will contact the contact member 43 of the S eject arm 41 and eject it. Retract one end of arm 41. When one end side of the eject arm 41 is retracted, the other end side of the eject arm 41 moves forward, and the push control unit 44 of the eject arm 41 pushes the trigger pin 47 to move the trigger plate 46 forward.

[0055] As shown in FIG. 4, when the optical disc 1 is transported to the clamp position, and one end side of the ejectarm 41 is retracted to a predetermined position, the trigger plate 46 is moved to the predetermined position by the advancement of the push control unit 44. Go forward. When the trigger plate 46 advances to a predetermined position, the rack portion 46A of the trigger plate 46 engages with the pion 66. The pion 66 is always rotating while the motor 65 is driving. When the rack portion 46 A of the trigger plate 46 is engaged with the pinion 66, the trigger plate 46 is further advanced by the rotation of the pinion 66. That is, at the moment when the rack portion 46A of the trigger plate 46 is engaged with the pinion 66, the power source for moving the trigger plate 46 is switched from the pressing force of the push control unit 44 to the rotation of the pinion 66.

As shown in FIG. 5, when the trigger plate 46 moves forward, the first shift bar 51 also moves forward by the transmission pin 48 of the trigger plate 46. When the first shift bar 51 moves forward, the second shift bar 55 moves rightward by the transmission pin 52 of the first shift bar 51. When the second shift bar 55 moves to the right, the switching stick 56 also moves to the right. As a result, the right end of the switching stick 56 contacts the switching lever of the third switch 73, and the third switch 73 is also turned on. When the third switch 73 is turned on, the control circuit 75 stops driving the motor 65. As a result, the rotation of the roller 23 of each loading arm 21 and the rotation of the pinion 66 are stopped.

[0057] When the second shift bar 55 moves to the right, the lift pins 64 inserted into the lift grooves 55B of the second shift bar 55 are lifted, and the traverse mechanism 61 is raised accordingly. As a result, the optical disc 1 is clamped between the turntable 62 and a clamper (not shown) disposed above the turntable 62.

At this time, as the first shift bar 51 moves forward, the retraction control pin 53 of the first shift bar 51 enters the first retraction control groove 34 of the rack plate 31. Then, when the retraction control pin 53 pushes the inclined edge of the first retraction control groove 34, the rack plate 31 further moves leftward. From this point, each loading arm 21 opens further. The roller 23 is separated from the periphery of the optical disc 1, and an appropriate clearance is secured between the roller 23 of each loading arm 21 and the periphery of the optical disc 1.

[0059] Further, when the rack plate 31 moves to the left due to the retraction control pin 53 entering the first retraction control groove 34, the select pin 38 of the select plate 37 is formed near the center in the left-right direction of the select cam groove 33. The select plate 37 is slightly moved backward by being pushed slightly backward by a part of the inclined groove portion. When the select plate 37 is retracted small, the support shaft 42 of the digitor 41 is also retracted small. At this time, the other end side of the eject arm 41 is pulled by a coil spring 49 extended by the advance of the trigger plate 46. Therefore, the eject arm 41 rotates counterclockwise, one end side of the eject arm 41 is retracted, and the contact member 43 of the eject arm 41 is separated from the periphery of the optical disc 1. As a result, an appropriate clearance is ensured between the contact member 43 of the eject arm 41 and the periphery of the optical disc 1.

[0060] As shown in FIG. 5, when the clamping of the optical disc 1 is completed and the eject arm 41 and each opening arm 21 are retracted, the spindle motor 65 (not shown) starts driving, and the turntable 62 rotates, Optical disc 1 rotates. Then, information is read from or recorded on the optical disk 1 by the optical pick-up 63.

When reading or writing of information with respect to the optical disc 1 is completed and an instruction to eject the optical disc 1 is given, the motor 65 is started in response to this instruction. At this time, the rotation direction of the motor 65 is opposite to that during loading. Then, the pinion 66 starts to rotate in the reverse direction, whereby the first shift bar 51 and the trigger plate 46 move backward. Further, the second shift bar 55 moves to the left, the switching stick 56 moves to the left, the switching stick 56 releases the switching lever force of the third switch 73, and the third switch 73 switches the on force to off. Further, the traverse mechanism 61 is lowered. Further, the retraction control pin 53 of the first shift bar 51 retreats from the first retraction control groove 34 of the rack plate 31, and the rack plate 31 moves rightward by the force of a spring (not shown). As a result, each loading arm 21 is closed, and the roller 23 of each loading arm 21 comes into contact with the peripheral edge of the optical disk 1. Further, when the trigger plate 46 is retracted, the eject arm 41 rotates clockwise, one end side of the eject arm 41 moves forward, and the contact member 43 moves to the optical detector. Touch the periphery of Isk 1. Furthermore, each roller 23 starts reverse rotation by the rotation of the motor 65.

[0062] Then, the optical disc 1 is pushed by the contact member 43 of the eject arm 41, and further conveyed forward by the reverse rotation of the roller 23 of each opening arm 21.

As shown in FIG. 6, as the optical disc 1 is transported forward, the leading end side of each loading arm 21 is closed, and the rack plate 31 moves rightward. Then, the switching edge 32 of the rack plate 31 contacts the switching lever of the first switch 71, and the first switch 71 is also turned on. When the first switch 71 is turned on, the control circuit 75 stops the driving of the motor 65. As a result, the rotation of the roller 23 of each loading arm 21 stops, and the optical disc 1 stops at the ejection completion position.

[0064] For example, in any optical disc, the completion position of the exit is a portion corresponding to about three-fifths to three-fourths of the surface area of the optical disc, and the remaining portion is exposed outside the disc slot 13. It is desirable that the position be within the disk drive 10. Thereby, it is possible to prevent the optical disk from dropping out of the disk slot 13 during ejection, and to make it easier for the user to take out the ejected optical disk by hand.

[0065] After that, when the user pushes the optical disc 1 stopped at the ejection completion position into the disc drive 10 again, each loading arm 21 is thereby opened, and the rack plate 31 moves to the left, and the first Switch 71 switches on force off and motor 65 starts to drive. Thereby, the rotation of the roller 23 of each loading arm 21 starts, and the optical disc 1 is drawn into the disc drive 10 again.

When the optical disk 2 having a diameter of 12 cm is inserted into the disk drive 10, the disk drive 10 operates as follows, for example.

[0067] As shown in FIG. 7, when the optical disc 2 is inserted into the disc drive 10, the periphery of the optical disc 2 contacts the roller 23 of each loading arm 21 and pushes each loading arm 21 backward. This opens each loading arm 21. When each loading arm 21 opens, the rack plate 31 moves to the left by the engagement of the gear 24, the pinion 25, and the rack portions 31A and 31B. When the rack plate 31 moves, the switching edge 32 1 Switch 71 is released from the switch lever, and 1st switch 71 is switched off. As a result, the control circuit 75 starts driving the motor 65. Thereby, the roller 23 of each loading arm 21 starts rotating, and the optical disk 2 is drawn into the disk drive 10 by the rotation of the roller 23.

[0068] As shown in FIG. 8, as the optical disk 2 is drawn and the optical disk 2 is conveyed backward, the loading arm 21 is further opened, and the rack plate 31 is further moved leftward. Then, the switching edge 32 releases the switching lever force of the second switch 72, and the second switch 72 switches the on force to off. The control circuit 75 does not change the operation by the switching of the second switch 72 at this time, and therefore the motor 65 continues to rotate and the optical disk 2 continues to be conveyed.

[0069] The opening of the loading arms 21 and 21 when the optical disk 2 having a diameter of 12 cm is conveyed is larger than the opening of the loading arms 21 and 21 when the optical disk 1 having a diameter of 8 cm is conveyed. As a result, the movement amount of the rack plate 31 when the optical disk 2 having a diameter of 12 cm is conveyed is larger than the movement amount of the rack plate 31 when the optical disk 1 having a diameter of 8 cm is conveyed. When the rack plate 31 moves greatly in the left direction in this way, the select pins 38 inserted in the select cam grooves 33 of the rack plate 31 are all of the inclined grooves formed near the center of the select cam groove 33 in the left-right direction. Is pushed backwards greatly, and the select plate 37 is retracted greatly. As a result, the support shaft 42 of the eject arm 41 is largely retracted, and the trigger plate 46 is also retracted greatly.

When the conveyance of the optical disc 2 continues, the rear peripheral edge of the optical disc 2 eventually comes into contact with the contact member 43 of the eject arm 41 and the one end side of the eject arm 41 is retracted. When one end side of the ejector arm 41 moves backward, the other end side of the eject arm 41 moves forward, and the push control unit 44 of the eject arm 41 pushes the trigger pin 47 to move the trigger plate 46 forward.

As shown in FIG. 9, when the optical disc 2 is transported to the clamp position and one end side of the ejector arm 41 is retracted to the predetermined position, the trigger plate 46 is moved to the predetermined position by the advancement of the push control unit 44. Go forward. When the trigger plate 46 advances to a predetermined position, the rack portion 46A of the trigger plate 46 engages with the pion 66. When the rack 46A of the trigger plate 46 engages with the pinion 66, the trigger plate is rotated by the rotation of the pinion 66. Tote 46 goes further.

As shown in FIG. 10, when the trigger plate 46 moves forward, the first shift bar 51 also moves forward by the transmission pin 48 of the trigger plate 46. When the first shift bar 51 moves forward, the second shift bar 55 moves rightward by the transmission pin 52 of the first shift bar 51. When the second shift bar 55 moves to the right, the switching stick 56 also moves to the right. As a result, the right end of the switching stick 56 contacts the switching lever of the third switch 73, and the third switch 73 is also turned on. When the third switch 73 is turned on, the control circuit 75 stops driving the motor 65. As a result, the rotation of the roller 23 of each loading arm 21 and the rotation of the pinion 66 are stopped.

[0073] When the second shift bar 55 moves to the right, the lifting pins 64 inserted into the lifting grooves 55B of the second shift bar 55 are lifted, and the traverse mechanism 61 is raised accordingly. As a result, the optical disc 2 is clamped between the turntable 62 and a clamper (not shown) disposed above the turntable 62.

At this time, the retraction control pin 53 of the first shift bar 51 enters the second retraction control groove 35 of the rack plate 31 as the first shift bar 51 moves forward. Then, when the retraction control pin 53 pushes the inclined edge of the second retraction control groove 35, the rack plate 31 further moves leftward. As a result, each loading arm 21 opens further, the roller 23 of each loading arm 21 moves away from the periphery of the optical disc 2, and an appropriate clearance is provided between the roller 23 of each loading arm 21 and the periphery of the optical disc 2. Secured.

[0075] Further, when the rack plate 31 moves to the left due to the retraction control pin 53 entering the second retraction control groove 35, the select pin 38 of the select plate 37 is formed at the right end of the select cam groove 33. The select plate 37 is retracted slightly by being pushed slightly backward by the groove. When the select plate 37 is retracted small, the support shaft 42 of the eject arm 41 is also retracted small. At this time, the other end side of the eject arm 41 is pulled by a coil spring 49 extended by the advance of the trigger plate 46. For this reason, the eject arm 41 rotates counterclockwise, one end side of the eject arm 41 moves backward, and the contact member 43 of the eject arm 41 moves away from the periphery of the optical disc 2. As a result, an appropriate clearance is ensured between the contact member 43 of the eject arm 41 and the periphery of the optical disc 2. [0076] As shown in FIG. 10, when the clamping of the optical disk 2 is completed and the eject arm 41 and each opening arm 21 are retracted, the spindle motor 65 (not shown) starts driving, and the turntable 62 rotates, The optical disk 2 rotates. Then, information is read from or recorded on the optical disc 2 by the optical pick-up 63.

[0077] When reading or writing of information on the optical disk 2 is completed and an instruction to eject the optical disk 2 is given, the motor 65 is started in response to this instruction. At this time, the rotation direction of the motor 65 is opposite to that during loading. Then, the pinion 66 starts to rotate in the reverse direction, whereby the first shift bar 51 and the trigger plate 46 move backward. Further, the second shift bar 55 moves to the left, the switching stick 56 moves to the left, the switching stick 56 releases the switching lever force of the third switch 73, and the third switch 73 switches the on force to off. Further, the traverse mechanism 61 is lowered. Further, the retraction control pin 53 of the first shift bar 51 retracts from the second retraction control groove 35 of the rack plate 31, and the rack plate 31 moves to the right by the force of a spring (not shown). As a result, each loading arm 21 is closed, and the roller 23 of each loading arm 21 comes into contact with the periphery of the optical disk 2. Further, when the trigger plate 46 is retracted, the eject arm 41 rotates clockwise, one end side of the eject arm 41 moves forward, and the contact member 43 comes into contact with the peripheral edge of the optical disk 2. Furthermore, each roller 23 starts reverse rotation by the rotation of the motor 65.

Then, the optical disk 2 is pushed by the eject arm 41 and further conveyed forward by the reverse rotation of the roller 23 of each loading arm 21.

As shown in FIG. 11, as the optical disc 2 is conveyed in the forward direction, the leading end side of each loading arm 21 is closed and the rack plate 31 is moved in the right direction. Then, the switching edge 32 of the rack plate 31 contacts the switching lever of the second switch 72, and the second switch 72 is also turned on. When the second switch 72 is turned on, the control circuit 75 stops driving the motor 65. As a result, the rotation of the roller 23 of each loading arm 21 stops, and the optical disc 2 stops at the ejection completion position.

[0080] Thereafter, when the user pushes the optical disk 2 stopped at the ejection completion position into the disk drive 10 again, each loading arm 21 is thereby opened, and the rack plate is opened. 31 moves to the left, the second switch 72 is switched off and the motor 65 starts to drive. Thus, the optical disk 2 is drawn back into the disk drive 10 by the rotation of the roller 23 of each loading arm 21.

[0081] (Rack plate position detection and motor control)

FIG. 12 schematically shows the rack plate 31, the first switch 71, and the second switch 72. As shown in FIG. 12, the first switch 71 and the second switch 72 have a function of detecting the position of the rack plate 31 in the left-right direction. Then, by detecting the position of the rack plate 31 in the left-right direction, the first switch 71 causes (1) the force or force that the optical disk 1 having a diameter of 8 cm reaches the completion position, and (2) the reloading of the optical disk 1 (3) It is detected whether any optical disk is inserted into the disk drive 10 or not. On the other hand, the second switch 72 is (1) whether or not the optical disk 2 having a diameter of 12 cm has reached the ejection completion position, and (2) force force force at which re-loading of the optical disk 2 is started. Detect whether the type of optical disk is optical disk 1 with a diameter of 8 cm or optical disk 2 with a diameter of 12 cm.

Now, the position in the left-right direction of the rack plate 31 when the optical disk 1 having a diameter of 8 cm has reached the completion position is defined as a first reference position P1. The first switch 71 is disposed at a position where the right end of the switching edge 32 and the switching lever 71A come into contact when the position of the rack plate 31 in the left-right direction is at the first reference position P1. Then, the first switch 71 detects whether or not the position of the rack plate 31 in the left-right direction is the first reference position P1, based on the contact between the right end of the switching edge 32 and the switching lever 71A. Thereby, the first switch 71 detects whether or not the optical disk 1 having a diameter of 8 cm has reached the ejection completion position.

[0083] Furthermore, the position in the left-right direction of the rack plate 31 when the optical disk 1 having a diameter of 8 cm reaches the completion position of the optical disc 1 is also the position of the rack plate 31 immediately before the re-loading of the optical disk 1 is started. is there. When the user gently pushes the optical disk 1 into the disk drive 10 to reload the optical disk 1 at the ejection completion position, the rack plate 31 immediately moves to the left, and the position of the rack plate 31 is the first position. The reference position is lost. The first switch 71 has a first horizontal position of the rack plate 31 in the first position. By detecting whether or not it is the reference position PI, it is also detected whether or not the re-loading of the optical disc 1 has been started.

Furthermore, in this embodiment, when the optical disk 1 having a diameter of 8 cm reaches the completion position of the rack plate 31 in the left-right direction and when no optical disk is inserted into the disk drive 10. The position of the rack plate 31 in the left-right direction in the standby state is equal. Accordingly, the first reference position P1 is also the position in the left-right direction of the rack plate 31 when no optical disk is inserted into the disk drive 10. When any optical disk is inserted into the disk drive 10, the rack plate 31 immediately moves to the left, and the position of the rack plate 31 is not the first reference position. The first switch 71 also detects whether any optical disk is inserted into the disk drive 10 by detecting whether or not the position of the rack plate 31 in the left-right direction is the first reference position P1.

[0085] On the other hand, the position in the left-right direction of the rack plate 31 when the optical disc 2 having a diameter of 12 cm has reached the completion position is defined as a second reference position P2. The second switch 72 is arranged at a position where the right end of the switching edge 32 and the switching lever 72A come into contact with each other when the rack plate 31 has a horizontal position at the second reference position P2. Then, the second switch 72 detects whether or not the position of the rack plate 31 in the left-right direction is the second reference position P2 with reference to the contact between the right end of the switching edge 32 and the switching lever 72A. Thereby, the second switch 72 detects whether or not the optical disk 2 having a diameter of 12 cm has reached the ejection completion position.

[0086] Further, the horizontal position of the rack plate 31 when the optical disk 2 having a diameter of 12 cm reaches the completion position of the optical disc 2 is also the position of the rack plate 31 immediately before re-loading of the optical disk 2 is started. . When the user gently pushes the optical disk 2 into the disk drive 10 to re-open the optical disk 2 at the ejection completion position, the rack plate 31 immediately moves to the left, and the position of the rack plate 31 is 2 Reference position P2 disappears. The second switch 72 detects whether or not the re-loading of the optical disk 2 has been started by detecting whether or not the position of the rack plate 31 in the left-right direction is the second reference position P2. Furthermore, the second switch 72 also has a function of detecting the type (diameter) of the optical disk loaded in the disk drive 10. That is, when the position of the optical disk 1 having a diameter of 8 cm is the clamp position, the second switch 72 is on as shown in FIG. On the other hand, when the position of the optical disk 2 having a diameter of 12 cm is the clamp position, as shown in FIG. 10, the second switch 72 is off. In other words, the on / off state of the second switch 72 differs depending on whether the diameter of the optical disk existing at the clamp position is 8 cm or 12 cm. As described above, the second switch 72 also detects the type of the optical disk loaded in the disk drive 10.

It should be noted that the fact that the position of the optical disk is the clamp position can be detected by the on / off state of the third switch 73. That is, the third switch 73 is on when clamping, and is off when not.

FIG. 13 shows a signal state in the control circuit 75 when the optical disk 1 having a diameter of 8 cm is inserted into the disk drive 10. In this embodiment, the output signal of each switch 71, 72, 73 is high level (H) when the switch is on, and low level (L) when the switch is off. The identification signal indicating the result of identifying the type of optical disk is low when the diameter of the optical disk is 8 cm, and high when the diameter of the optical disk is 12 cm. The motor drive signal is at a high level when the motor 65 is driven, and is at a low level when the motor 65 is stopped.

As shown in FIG. 13, in a standby period in which no optical disk is inserted into the disk drive 10, the position of the rack plate 31 is the first reference position, and the first switch 71 is on. Accordingly, a high level output signal is output from the first switch 71. At this time, the control circuit 75 outputs a low-level motor drive signal and stops the drive of the motor 65.

[0091] When an optical disk 1 having a diameter of 8 cm is inserted into the disk drive 10 (time tl), the rack plate 31 also moves the first reference position force, and the first switch 71 switches the on-force to off. Therefore, the level of the output signal of the first switch 71 is switched from the high level to the low level. At this time, the control circuit 75 switches the level of the motor drive signal from the low level to the high level, and starts driving the motor 65. As a result, loading of the optical disc 1 is started. [0092] When the optical disc 1 is transported to the clamp position and the clamp operation is completed (time t2), the third switch 73 is also turned on. Therefore, the output signal level of the third switch 73 is switched from the low level to the high level. At this time, the control circuit 75 switches the level of the motor drive signal from the low level to the low level, and stops the drive of the motor 65.

[0093] When the clamping operation is completed, or when information is being read from or recorded on the optical disc 1, the disc identification circuit 76 sets the type (diameter) of the currently loaded optical disc to the second switch. Identify based on 72 output signal levels. The currently installed optical disk is an optical disk 1 with a diameter of 8cm. For this reason, as shown in FIG. 5, the second switch 72 is turned on when the clamp operation is completed. Therefore, as shown in FIG. 13, the level of the output signal of the second switch 72 is high during the period from time t2 to immediately before time t3. At this time, the disc identification circuit 76 outputs a low level identification signal.

[0094] When the reading or recording of information with respect to the optical disc 1 is completed and an instruction is given to eject the optical disc 1, in response to this instruction, the control circuit 75 changes the motor drive signal level from low to high. Switch to level and start driving motor 65. As a result, the clamp is released. When the clamp is released (time t3), the third switch 73 is switched off. Accordingly, the level of the output signal of the third switch 73 is switched from the high level to the low level. Then, ejection of the optical disc 1 is started.

[0095] When the optical disc 1 reaches the ejection completion position (time point t4), the rack plate 31 reaches the first reference position, and the first switch 71 is switched on. Therefore, the level of the output signal of the first switch 71 is switched from the low level to the high level. At this time, the control circuit 75 detects the level of the identification signal. When the identification signal level is low, the control circuit 75 switches the level of the motor drive signal from high level to low level, and stops driving the motor 65. As a result, the optical disc 1 stops at the ejection completion position.

[0096] When the optical disk 1 stopped at the ejection completion position is pushed into the disk drive 10 (time t5) to re-load the optical disk 1, the rack plate 31 moves to the 1st reference position force, and the 1st switch 71 is also turned off. Therefore, the level of the output signal of the first switch 71 is switched from the high level to the low level. At this time, the control circuit 75 detects the level of the identification signal. When the identification signal level is low, the control circuit 75 switches the level of the motor drive signal from low level to high level and starts driving the motor 65. Thereby, re-loading of the optical disk 1 is started.

FIG. 14 shows a signal state in the control circuit 75 when the optical disk 2 having a diameter of 12 cm is inserted into the disk drive 10. As shown in FIG. 14, the shifted optical disk is also inserted into the disk drive 10. During the standby period, the position of the rack plate 31 is the first reference position, and the first switch 71 is on. Therefore, a high level output signal is output from the first switch 71. At this time, the control circuit 75 outputs a low-level motor drive signal and stops the drive of the motor 65.

[0098] When the optical disk 2 having a diameter of 12 cm is inserted into the disk drive 10 (time tl), the rack plate 31 also moves the first reference position force, and the first switch 71 is switched off. Therefore, the level of the output signal of the first switch 71 is switched from the high level to the low level. At this time, the control circuit 75 switches the level of the motor drive signal from the low level to the high level, and starts driving the motor 65. As a result, loading of the optical disc 2 is started.

[0099] If the rack plate 31 moving leftward exceeds the second reference position (time ta) during the transport of the optical disk 2, the second switch 72 is switched off and the output of the second switch 72 is output. The signal level changes from high level to low level. However, the control circuit 75 does not change the operation by this switching!

[0100] When the optical disk 2 is transported to the clamp position and the clamp operation is completed (time point t2), the third switch 73 is also turned on. Therefore, the output signal level of the third switch 73 is switched from the low level to the high level. At this time, the control circuit 75 switches the level of the motor drive signal from the low level to the low level, and stops the drive of the motor 65.

[0101] When the clamping operation is completed, or when information is read from or written to the optical disc 2. When recording is in progress, the disc identification circuit 76 discriminates the type (diameter) of the currently loaded optical disc based on the level of the output signal of the second switch 72. The currently installed optical disc is an optical disc 2 with a diameter of 12cm. For this reason, as shown in FIG. 10, the second switch 72 is off when the clamping operation is completed. Therefore, as shown in FIG. 14, the level of the output signal of the first switch 71 is low during the period from time t2 to immediately before time t3. At this time, the disk identification circuit 76 outputs a high level identification signal.

[0102] When the reading or recording of information on the optical disc 2 is completed and an instruction to the optical disc 2 is given, the control circuit 75 changes the motor drive signal level from low to high in response to this instruction. Switch to level and start driving motor 65. As a result, the clamp is released. When the clamp is released (time t3), the third switch 73 is switched off. Accordingly, the level of the output signal of the third switch 73 is switched from the high level to the low level. Then, ejection of the optical disc 2 is started.

[0103] When the optical disc 2 reaches the ejection completion position (time t4), the rack plate 31 reaches the second reference position, and the second switch 72 is also turned on. Accordingly, the level of the output signal of the second switch 72 is switched from the low level to the high level. At this time, the control circuit 75 detects the level of the identification signal. When the identification signal level is high, the control circuit 75 switches the level of the motor drive signal from high level to low level and stops driving the motor 65. As a result, the optical disk 2 stops at the ejection completion position.

[0104] When the optical disk 2 stopped at the ejection completion position is pushed into the disk drive 10 (time t5) by the user to re-load the optical disk 2, the rack plate 31 also has the second reference position force. Moves and the second switch 72 is switched off. Therefore, the level of the output signal of the second switch 72 is switched from the high level to the low level. At this time, the control circuit 75 detects the level of the identification signal. When the identification signal level is high, the control circuit 75 switches the level of the motor drive signal from low level to high level and starts driving the motor 65. Thereby, re-loading of the optical disk 2 is started. [0105] As described above, according to the disk drive 10, it is possible to realize transport control of a plurality of types of optical disks having different diameters with a simple structure. That is, when the movement of the rack plate 31 in the left-right direction is detected using the two switches 71 and 72, the motor 65 is driven at the start of loading for a plurality of types of optical disks having different diameters by a simple structure. The start and start of optical disk pull-in, motor 65 drive stop and optical disk stop at the exit completion position, motor start when re-loading starts and drive start of optical disk can be started at appropriate timing. Therefore, the disk drive 10 can be reduced in size, thickness, weight, and manufacturing cost.

[0106] When the diameter of the optical disk is different, the rotation angle of each loading arm 21 when the optical disk is inserted differs depending on the diameter of the optical disk. The disk drive 10 converts the rotation angle of each loading arm 21 for each diameter of the optical disk by converting the rotation of each loading arm 21 into the horizontal movement of the rack plate 31. Convert to position difference. Since the rack plate 31 moves linearly, even if the position of the rack plate 31 varies depending on the diameter of the optical disk, this difference in position can be easily detected. That is, by arranging a plurality of switches in a straight line along the movement direction of the rack plate 31, the position of the rack plate 31 that differs for each diameter of the optical disk can be detected. In addition, switches with a small number of switches can be arranged close to each other, and switches can be arranged in a straight line, so that the wiring is also simple.

In particular, the optical disc completion position is a position at which about 3/5 to 3/4 of the optical disc is exposed from the disc slot 13. The detection completion position is difficult to detect, and the detection force is further increased if the completion position is different for each diameter of the optical disc. However, the disc drive 10 detects the difference in the ejection completion position for each diameter of the optical disc by converting it into a difference in the position of the rack plate 31 that moves linearly. This makes it possible to detect an ejection completion position that differs depending on the diameter of the optical disc by a simple structure in which two switches 71 and 72 are arranged.

[0108] Also, according to the disk drive 10, the completion of the clamping operation can be confirmed using the switch 73. It can be easily detected, and the motor 65 can be stopped when the clamping operation is completed with a simple structure.

[0109] Also, according to the disk drive 10, the type (diameter) of the optical disk inserted into the disk drive 10 can be identified with a simple structure. That is, at the time of clamping, the position of the rack plate 31 is different for each diameter of the optical disk. Since the position of the rack plate 31 changes linearly, a difference in the position of the rack plate 31 can be easily detected by the switch 72, and thus the optical disc can be easily identified.

In the above description, the power of the disk drive 10 that handles two types of optical disks having a diameter of 8 cm and a diameter of 12 cm is taken as an example. The present invention is not limited to this. The present invention can also be applied to three or more types of optical discs having different diameters. For example, when handling three types of optical disks with different diameters, the three switches are switched on and off by the switching edge.

[0111] Further, in the above description, the force is exemplified by the case where the position of the rack plate is detected using a switch. The present invention is not limited to this. For example, an optical sensor may be used to detect the position of the rack plate.

[0112] In the above description, the rack plate 31 is a specific example of the first moving member, and the gear 24, the pion 25, and the rack portion 31A are specific examples of the movement variation. The switch unit 69 is a specific example of the position detecting means, the first switch 71 is a specific example of the first detecting means, and the second switch 72 is a specific example of the second detecting means. Further, the optical disc 1 is a specific example of a first optical disc having a small diameter, and the optical disc 2 is a specific example of a second optical disc having a large diameter. The second shift bar 55 is a specific example of the second moving member, and the disk identification circuit 76 is a specific example of the disk identification means.

[0113] Further, the present invention can be appropriately changed without departing from the gist or concept of the invention which can also read the claims and the entire specification, and a disc drive accompanying such a change is also applicable to the present invention. It is included in the technical idea.

Industrial applicability

[0114] The disk drive according to the present invention includes, for example, a DVD drive and a CD (Compact Disc) drive. It can be used for disk drives such as More specifically, it can be used for a disk transport mechanism of a slot-in type disk drive.

Claims

The scope of the claims

[1] A disk drive that reads or records information on a plurality of types of optical disks having different diameters.

A substrate,

A pair of arms supported rotatably on the substrate, holding a periphery of the optical disc, and transporting the optical disc;

A first moving member supported by the substrate so as to be movable in the left-right direction;

A motion conversion mechanism that converts the rotation of the arm into a lateral movement of the first moving member;

Position detecting means for detecting a position of the first moving member in the left-right direction, the position detecting means detecting whether or not the position of the first moving member is a first reference position. And a second detection means for detecting whether or not the position of the first moving member is a second reference position.

[2] The first reference position is a position in the left-right direction of the first moving member when the position force ejection completion position of the first optical disk having a small diameter included in the plurality of types of optical disks. The position is a position in the left-right direction of the first moving member when the position force ejection completion position of the second optical disk having a large diameter included in the plurality of types of optical disks. The disk drive described in the section.

[3] The range according to claim 2, wherein the first reference position is also a horizontal position of the first moving member when no optical disk is inserted in the disk drive. Disk drive.

[4] A roller provided at a tip of each arm and in contact with a peripheral edge of the optical disc; a motor that rotates each roller;

When the first optical disk is ejected, the motor is controlled based on the detection result of the first detection means, and when the second optical disk is ejected, the motor is controlled based on the detection result of the second detection means. 3. The disk drive according to claim 2, further comprising a control circuit that performs drive control.

[5] The first detection means is a first switch, and the second detection means is a second switch, and each of these switches is turned on and off depending on the presence or absence of contact with the first moving member. The disk drive according to claim 1, wherein the disk drive is replaced.

[6] a clamping mechanism for clamping the optical disc;

A second moving member that moves in a clamping operation and a clamping release operation of the clamping mechanism;

6. The disk drive according to claim 5, further comprising a third switch that is switched on and off depending on presence or absence of contact with the second moving member.

7. A disc identification unit for identifying the type of the optical disc using a detection result obtained by the second detection unit obtained when the position of the optical disc is a clamp position. A disk drive as described in Section 2 of the scope.