JPH10255368A - Optical disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the loading of a single optical disk and a disk cartridge respectively by providing a tray equipped with loading parts for the single optical disk and the disk cartridge and a shutter opening and closing arm for opening and closing a shutter of the disk cartridge when the disk cartridge is placed on the loading part. SOLUTION: Vertical movement of a drive base 6 is performed by engaging a cam groove 17a of a drive base vertically moving cam 17 supported freely linearly movably by a base via pins 25 with a pin 6a fixed to a front end part of the drive base 6 and moving the cam 17 horizontally. By moving the cam 17 horizontally, the drive base 6 is rotated to mount the optical disk on a turntable 7a of a spindle motor 7. By inserting the disk cartridge 26 into a front door of the disk tray 1, the insertion is feasible in a direct insertion system.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording / reproducing apparatus capable of recording or reproducing a single optical disk and an optical disk stored in a disk cartridge.

[0002]

2. Description of the Related Art Conventionally, when loading an optical disk into a recording / reproducing apparatus, the optical disk is loaded in either a format using a disk cartridge containing the optical disk or a format using a single optical disk not contained in the disk cartridge. Often.
For optical discs that use a disc cartridge,
PD (Phase change otical Disk), CD-ROM (Co
mpact Disk-Read Only Memory), and the format using a single optical disk is CD (Compact Disk) or CD-R.
OM etc.

In addition to the above optical disks, DVD
(Digital Versatile Disk), DVD-ROM (Digita
l Versatile Disk-Read Only Memory) or DV
D-RAM (Digital Versatile Disk-Random Access M)
emory) etc. are receiving attention. DVD appeared as a single optical disk, but DVD-ROM and DVD-RA
M is also being studied as an optical disk of the type using a cartridge. There is a need for an optical disk recording / reproducing apparatus capable of reproducing both a single optical disk and an optical disk using a cartridge.

A conventional example of an optical disk recording / reproducing apparatus capable of reproducing both a single optical disk and an optical disk using a cartridge as described above is disclosed in Japanese Patent Laid-Open No. 4-362560.
And JP-A-7-161112.

FIG. 11 shows an optical disk recording / reproducing apparatus described in Japanese Patent Application Laid-Open No. 4-362560. FIG. 11 is a right side view illustrating a loading portion of a disk cartridge in a conventional optical disk recording / reproducing device. FIG.
It is a right view explaining the loading part of the single optical disk in the device of the conventional example.

The loading operation of the disk cartridge will be described with reference to FIG. The disk tray 35 is pulled into the optical disk recording / reproducing apparatus (hereinafter, referred to as “disk tray 35”).
"The disc tray 35 is closed." ). Then, the disc cartridge 37 is pushed into the disc cartridge insertion door 36 provided on the front surface of the disc tray 35 and inserted.

[0007] The disc cartridge 37 is gripped by the claws 41 at both ends of the disc cartridge 37 by the cartridge carrier 38 and is conveyed into the optical disc recording / reproducing apparatus. Then, the disk 37a in the cartridge
Is a clamper 37b also provided in the cartridge.
Is fixed on the turntable 40. This loading is a direct insert type loading.

Next, the loading operation of a single optical disk will be described with reference to FIG. The disc tray 35 is set in a state of being ejected out of the optical disc recording / reproducing apparatus (hereinafter, referred to as “opening the disc tray 35”). After the single optical disk is placed on the disk tray 35, the disk tray 35 is pulled into the optical disk recording / reproducing apparatus (hereinafter, "loading the optical disk").

Inside the cartridge carrier 38, a clamper 39 for a single optical disk rotatably supported is provided. After the disc tray 35 is moved to a position where the center hole of the pulled-in single optical disc and the axis of the clamper 39 substantially match, the clamper 39 and the turntable 40 inside the cartridge carrier clamp the single optical disc 42 by sandwiching it. . Disc tray 3
When the optical disk 5 is ejected out of the optical disk recording / reproducing apparatus and the optical disk is taken out (hereinafter referred to as "unloading the optical disk"), the reverse operation is performed. This loading is a disc tray type loading.

In the configuration of the optical disk recording / reproducing apparatus as described above, it is assumed that an optical disk such as a CD having only one information reading surface is used. By providing a clamper for the optical disk on the upper side of the disk cartridge and providing a cutout hole for passing the turntable on the lower side, the optical disk can be clamped between the clamper and the turntable.

However, DVD, DVD-ROM or D
In the case of an optical disk having an information surface on both sides such as a VD-RAM, a clamper cannot be provided on the disk cartridge in order to place both sides of the disk cartridge. Therefore, it is not possible to reproduce both sides of a disk cartridge using an optical disk recording / reproducing apparatus as described in JP-A-4-362560.

If a disk having a hub at the center of the optical disk is used, the optical disk cartridge can be mounted on both sides. However, since the turntable needs to be compatible with both disks with and without a hub, a turntable is required. The table and optical pickup must be moved up and down, sacrificing mechanical accuracy. When a hub is used for an optical disk such as a DVD or a DVD-ROM having an information surface on both sides, there is a disadvantage that it is not suitable to use a single optical disk and a disk cartridge together.

Further, for example, when loading a disk cartridge in a loading state of a single optical disk,
Open the disc tray, take out the single optical disc, close the disc cartridge,
Then, it is necessary to close the disk tray once, for example, to load a cartridge.

In addition, as in an optical disk recording / reproducing apparatus described in JP-A-7-161112, both a single optical disk and a disk cartridge can be mounted on a disk tray, and one of them is mounted on the disk tray. Such an optical disk tray system is known.

However, when a disk cartridge is mounted, it is necessary to eject the disk tray once as well, and there is a drawback that the operation is complicated in both configurations and it takes time to replace the disk cartridge.

[0016]

When unloading a disk cartridge, the disk cartridge is pulled out and unloaded while the disk tray is in a closed state, so that the replacement is quick. There is a need for an optical disk recording / reproducing apparatus in which the tray can be opened and the optical disk can be replaced. In an optical disc recording / reproducing apparatus having an information recording / reproducing surface on both sides, a direct insert type loading is used for a disc cartridge,
Provided is an optical disk recording / reproducing apparatus that performs loading by a disk tray method for a single optical disk.

[0017]

According to the first aspect of the present invention, there is provided an optical disk recording / reproducing apparatus for recording or reproducing both a single optical disk and an optical disk in a disk cartridge by one apparatus. An opening into which the disc cartridge is inserted;
A disk tray provided with a single optical disk mounting portion on which the single optical disk is positioned and mounted, a disk cartridge mounting portion on which a disk cartridge is positioned and mounted, and a disk tray inserted through an opening of the disk tray. A shutter opening / closing arm for opening and closing a shutter of the disk cartridge when the disk cartridge is mounted on a mounting portion.

According to a second aspect of the present invention, in the optical disk recording / reproducing apparatus according to the first aspect, when loading the single optical disk, the rear end of the disk tray pushes the shutter opening / closing arm rearward and retracts. It is characterized by making it.

According to a third aspect of the present invention, in the optical disk recording / reproducing apparatus according to the first or second aspect, the unloading amount of the disk tray when unloading the optical disk is determined by unloading the single optical disk. It is characterized in that there are two stages between loading and unloading the disk cartridge.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an optical disk recording / reproducing apparatus according to an embodiment of the present invention.

The disk tray of the optical disk recording / reproducing apparatus includes a disk tray 1 on which a single optical disk and a disk cartridge can be mounted, and a motor 16 for driving the disk tray 1 to move in the front-rear direction.

The drive base of the optical disk recording / reproducing apparatus includes a spindle motor 7 fixed on the drive base 6 for driving the optical disk to rotate. The drive base 6 is mounted on the drive base 6 so as to be movable in the radial direction of the optical disk. An optical pickup 8 for irradiating and reading / writing a signal on / from an optical disk and a motor 19 for raising / lowering the drive base 6 are provided.

The clamp section of the optical disk recording / reproducing apparatus includes a magnet clamper 4 for fixing the optical disk to the turntable 7a and a clamp arm 3 to which the magnet clamper 4 is rotatably fixed.

The shutter opening / closing section of the optical disk recording / reproducing apparatus includes shutter opening / closing arms 12 and 13 for opening and closing the shutter of the optical disk cartridge.

The base 11 of the optical disk recording / reproducing apparatus is
It has the tray section, drive base section, clamper section, and shutter opening / closing section.

The housing of the optical disk recording / reproducing apparatus comprises a cover 21 and a front panel 22.
The base 11 is placed on the cover 21, and the front panel 22 is provided with a front door 23 and an operation button (not shown) for blocking foreign matter and dust from entering by closing the entrance of the disc tray 1. Have been.

These units are connected to an electric circuit unit (not shown) by a signal code (not shown), and a series of controls are performed. The electric circuit is a CPU (Central Processing Uni
t), and controls the operation of each unit according to an instruction input from an operation button.

A disk tray 1 for mounting either an individual optical disk or an optical disk stored in a disk cartridge and for inserting and removing the optical disk into and out of the optical disk recording / reproducing apparatus main body is supported movably in the front-rear direction. It has a rack 1g on one inside of the lower side,
The gear 15 meshing therewith is driven by a motor 16 to move in the front-rear direction.

The disc tray 1 has a disc tray notch 1h (hatched portion) for allowing a disc cartridge to be mounted from the front side or from above the disc tray.
Disk cartridge mounting surface 1a, recesses 1b and 1c for mounting two types of single optical disks having different diameters, and holes for passing positioning pins 9 and 10 of the disk cartridge fixed to four corners of drive base 6 from below the disk tray. 1d and a concave portion 1i (hatched portion) for facilitating mounting of a disk cartridge or a single optical disk below the notch 1h.

In order to prevent the disc cartridge 1 from dropping and being excessively inserted when the disc cartridge is mounted on the disc tray 1, the disc tray 1 has a leaf spring 2 on both front sides and a stopper 1f at the back of the disc tray 1.

Further, cams 1e are provided on both sides of the disc tray.
And a cam follower 3a in contact with the cam surface is provided with a clamp arm 3 rotatably supporting a magnet clamper 4.
And are pressed by a coil spring 20. The clamp arm 3 has a bearing 3b for supporting the base 11 with the shaft 5.

Thus, the vertical movement of the cam follower 3a is defined as the rotation of the clamp arm 3. By moving the cam 1e of the disk tray 1 in the front-rear direction and moving the cam follower portion 3a in the vertical direction, the magnet clamper 4 for fixing the single optical disk or the optical disk in the disk cartridge to the turntable 7a can be moved up and down. is there.

Behind the drive base 6 on which the spindle motor 7 is fixed and the pickup 8 is movably supported, there is a bearing 6b rotatably mounted coaxially with the shaft 5 of the clamp arm 3. A pin 6a is fixed to the opposite front end face, and the pin 6a is restrained by a drive base elevating cam 17 having a cam groove and a rack. The drive base elevating cam 17 is driven by a gear 18 and a motor 19. .

At the rear of the optical disk recording / reproducing apparatus, there are provided shutter opening / closing arms 12 and 13 rotatably supported by pins 11b fixed to a base 11, and a force is applied in a forward direction by a torsion spring 14. It has become. The lower surfaces of the shutter opening / closing arms 12 and 13 have protrusions 12a and 13a, respectively.
13a is restricted from rotating by the groove 11a of the base 11.

The two shutter opening / closing arms 12, 1
Numeral 3 is supported by changing the height in the vertical direction so that two can cross each other. Thus, the shutter of the disk cartridge can be opened and closed regardless of whether the disk cartridge is inserted from the front or back surface.

FIG. 2 is a front view showing a method of raising and lowering the drive base in the apparatus of this embodiment. When the drive base 6 is moved up and down, the cam groove 17a of the cam 17 which is supported by the base 11 of FIG. 1 via a pin 25 so as to be linearly movable is engaged with the pin 6a fixed to the front end of the drive base 6. The cam 17 is moved right and left by the motor 19 and the gear 18 shown in FIG. The drive base 6 rotates about the shaft 5 in FIG. 1 by the lateral movement of the cam 17, and the optical disk can be mounted on the turntable 7a of the spindle motor 7.

FIG. 3 is a right side view for explaining loading of a disk cartridge of the optical disk recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 3A shows a state in which the clamp arm 3 is raised by the cam 1e on the side of the disk tray and the drive base 6 is lowered by the cam 17 in FIG. 2, and no single optical disk or disk cartridge is inserted. It is a state explanation. This is a state of waiting for insertion of a disk cartridge or waiting for ejection of a disk tray. The insertion by the direct insertion method is possible by opening the front door 23 in the direction of arrow M and inserting the disk cartridge 26. is there.

FIG. 3B illustrates a state in which the entire disc tray has been ejected. At this time, the disk cartridge 26 is mounted on the disk tray upper surface 1a. That is, it is possible to mount a disk cartridge by a disk tray method.

FIG. 3C shows the state of the disk cartridge 26.
After loading the disc tray 1 on the disc tray 1, the disc tray 1 is stored in the optical disc recording / reproducing apparatus. Cams 1e on both sides of disc tray 1
As a result, the cam follower 3a and the clamp arm 3 which are in contact with each other are lowered (arrow C), and the drive base 6 is further raised (arrow D) by the cam 17, thereby clamping the disk 26a in the cartridge. This state is a state where the optical disk is recording or reproducing.

At this time, when the optical pickup 8 irradiates a laser beam to the information recording / reproducing surface of the optical disk, and it is determined that the disk cartridge is not inserted, FIG.
The process returns to the disk cartridge insertion standby state shown in FIG.

FIG. 3D shows the state of the disk cartridge 26.
Of the disc tray 1 when ejecting a disc. Only the front end portion of the disc tray 1 and the disc cartridge 26 is ejected, and the clamp arm 3 is ejected.
Is raised and the drive base 6 is lowered, and only the leaf spring 2 and the stopper 1f shown in FIG. 1 restrain the disk cartridge 26. Therefore, the disk cartridge 26 can be attached and detached in the direction of arrow E. It is. for that reason,
In this state, operation according to the direct insert method is possible.

If a disc cartridge is erroneously inserted when a single optical disc is inserted, and FIG.
Even in the disk cartridge insertion standby state (a), the single optical disk is not damaged because the height is different between the mounting position of the single optical disk and the mounting position of the disk cartridge. When a disk cartridge is mounted, there is no need to worry about double insertion because the disk cartridge covers the front notch of the disk tray.

As described above, the disk cartridge 26
The attachment / detachment can be selected from two methods, a direct insert method as shown in FIG. 3A or FIG. 3D or a method similar thereto, and a disk tray method as shown in FIG. 3B.

FIG. 4 is a right side view for explaining a method of loading a single optical disk in the optical disk recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 4A shows a state where the disc tray 1 has been ejected. A single optical disk 27 can be attached to and detached from the concave portion 1b or 1c of the disk tray 1 in FIG.

FIG. 4B shows a state in which the single optical disk is recording and reproducing. After mounting the single optical disk 27, the disk tray 1 is housed in the apparatus, the clamp arm 3 is lowered (arrow G), and the drive base 6 is raised (arrow H).
By doing so, the single optical disk 27 is clamped. In this state, recording and reproduction on the single optical disk 27 are possible.

The unloading operation of the single optical disk is the reverse of the above-described loading operation from FIG. 4A to FIG. 4B, and is performed by lowering the drive base 6 and discharging the entire disk tray 1. As described above, loading of a single optical disk is performed by a disk tray method.

FIG. 5 is a top view for explaining the opening and closing of the shutter of the disk cartridge of the optical disk recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 5A shows the state of FIG. 3A, that is, the disk cartridge insertion standby state as viewed from above. When the disk cartridge 26 is not mounted, the frontmost portion of the groove 11a of the base 11 and the rear end 1h of the disk tray coincide with each other, and the shutter opening / closing arms 12, 13 are moved by the torsion spring 14 into the groove 11a of the base 11. It comes into contact with the forefront portion or the rear end 1h of the disc tray and stops at the position shown in the figure.

FIG. 5B shows a state where the disk cartridge is inserted. The tip 12b of the shutter opening / closing arm enters the recess 26c of the shutter.
6b is completely open.

FIG. 5 (c) shows the state of FIG. 3 (c), that is, the recording / reproducing state of the optical disk as viewed from above.

FIG. 5D shows an example of the state of FIG. 3D, that is, the state in which the disk cartridge 26 has been ejected, as viewed from above. At this time, if the disk cartridge 26 is pulled out by hand to the left in the figure, the two leaf springs 2 on both sides open in the direction of arrow P, so that the disk cartridge 26 can be taken out.

FIG. 6A is a top view showing a state after the disk cartridge 26 is ejected from FIG. 5D. Even in this state, the disk cartridge 26 can be mounted in the same manner as in FIG.

FIG. 6 (b) is a diagram corresponding to FIG. 3 (b) and FIG.
As in (a), another state when the disc cartridge 26 is ejected is viewed from above. The shutter opening / closing arms 12 and 13 are stopped at the forefront of the groove 11a of the base 11.

FIG. 6C is similar to FIG. 4B,
This is a state in which recording / reproduction of a single optical disk is being performed. At this time,
The projections 12a, 13a of the shutter opening / closing arms 12, 13 are pushed by the rear end 1j of the disk tray, and the shutter opening / closing arm is moved rearward of the apparatus.

FIG. 6D shows a state where the disc cartridge is inserted upside down. FIG.
The tip 13b of the shutter opening / closing arm on the opposite side from (b)
Enters the recess 26c of the shutter 26b,
Is fully open.

Finally, the operation of the above embodiment will be described with reference to FIG.
This will be described with reference to FIG. 4 and the flowcharts of FIGS. 7, 8, 9, and 10. In the loading operation of the single optical disk, the single optical disk is mounted on the disk tray 1b or 1c in FIG.
When the eject switch is pressed or the disc tray 1 is pushed in the direction of arrow L, the loading motor (motor 16) rotates to store the disc tray 1 in the apparatus.

When the detection switch 34 is turned off, the clamp arm 3 has already been lowered by the cam 1e (arrow G in FIG. 4B). Thereafter, the clamp motor (motor 19) is rotated, and the drive base 6 is raised to perform recording / reproduction on the disk 27 (the state shown in FIG. 4B). Thereafter, the focus servo is turned on in order to focus the laser beam of the optical pickup 8 on the disk recording surface. However, when the laser beam is out of focus, it is determined that there is no optical disk, the clamp is released, and the disk shown in FIG. Return to the cartridge insertion standby state.

When the eject switch is depressed, the loading motor 16 is rotated until the detection switch 31 is turned off after the lowering operation of the drive base 6 is completed. The door 23 is pushed open to eject the disc tray 1.

On the other hand, in the loading operation of the disk cartridge, the disk cartridge 26 is mounted on the disk tray 1 in any of the states shown in FIGS. 3 (a), 3 (b) and 3 (d). When the user pushes hard in the direction of the arrow N in FIG. 3B or the arrow O in FIG. 3D or presses the eject button, the detection switch 31 or 31 is pressed.
Changes from OFF to ON, the loading motor 16 starts rotating, and enters the recording or reproducing state of FIG. 3C or the disk cartridge insertion standby state of FIG. 3A by the same operation as the loading of the single optical disk 27. return. In addition, in the state of FIG.
When inserting the disc cartridge 6, it is necessary to open the door 23 in the direction of arrow M by hand before inserting the disc cartridge 26.

When unloading the disk cartridge, pressing the eject switch in the state of FIG. 3A or FIG. 3C ejects the disk cartridge 26 together with the disk tray 1. There are two cases, one is when the button is pressed once and immediately released, and the other is when the disc tray 1 starts to be ejected and kept pressed until the detection switch 32 is turned off.

In the former case, the disc tray is ejected until the detection switch 31 is turned off to be in the state shown in FIG. 3B. This is convenient when ejecting the disc cartridge and subsequently recording or reproducing a single optical disc. It is.

In the latter case, when the detection switch 32 is turned off, the disc tray 1 stops at that position, and the entire tray is not ejected. Therefore, the moving distance of the disc tray becomes shorter, and the unloading is performed as compared with the former. Time is reduced. Therefore, replacement and removal of the disk cartridge 26 can be performed quickly.

As described above, in the case of a disk cartridge, the method of unloading is determined by the way in which the eject switch is pressed, so that a method suitable for the situation can be easily selected.

[0066]

According to the present invention, it is possible to load a disk cartridge containing a single optical disk having an information surface on both sides and an optical disk having an information surface on both surfaces, and in particular, a disk cartridge having no clamper. .

In the loading system, a single optical disk has a disk tray system, and a disk cartridge has both a direct insert system and a disk tray system, and the two can be selectively used by a simple operation. Therefore, for example, when only the disk cartridge is replaced and used, the direct insertion method is used, and when the disk cartridge is replaced with a single optical disk, the tray method is used, thereby shortening the disk replacement time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an optical disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view showing the elevation of the drive base of the optical disc recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 3 is a right side view illustrating loading of a disk cartridge of the optical disk recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 4 is a right side view illustrating loading of a single optical disk in the optical disk recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 5 is a top view for explaining opening and closing of a shutter of a disk cartridge of the optical disk recording / reproducing apparatus according to the embodiment of the present invention;

FIG. 6 is a top view illustrating opening and closing of a shutter of a disk cartridge of the optical disk recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 7 is a flowchart illustrating loading of a disk cartridge of the optical disk recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 8 is a flowchart illustrating unloading of a disk cartridge of the optical disk recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 9 is a flowchart illustrating loading of a single optical disk in the optical disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 10 is a flowchart illustrating unloading of a single optical disc in the optical disc recording / reproducing apparatus according to the embodiment of the present invention;

FIG. 11 is a right side view illustrating a loading portion of a conventional disk cartridge.

FIG. 12 is a right side view illustrating a loading section of a conventional single optical disk.

[Explanation of symbols]

1 ... Disc tray, 1a ... Disc cartridge mounting surface, 1b, 1c ... Single optical disc mounting section, 1d ...
... Hole, 1e ... Cam, 1f ... Stopper, 1g ... Rack, 1h ... Notch, 1i ... Recess, 1j ... Rear end,
2 ... leaf spring, 3 ... clamp arm, 3a ... cam follower, 3b ... bearing part, 4 ... magnet clamper,
5 ... axis, 6 ... drive base, 6a ... pin, 6b
... bearing, 7 ... spindle motor, 7a ... turntable, 8 ... pickup, 9, 10 ... positioning pin, 11 ... base, 11a ... groove, 11b ... pin
12, 13 ... shutter opening / closing arm, 12a, 13a
... Projections, 14 torsion springs, 15 gears, 16
... Motor, 17 ... Drive base elevating cam, 17a ...
... Cam groove, 18 ... Gear, 19 ... Motor, 20 ... Coil spring, 21 ... Cover, 22 ... Front panel,
23 front door, 25 pin, 26 disk cartridge, 26b shutter, 26c recess, 27 single optical disk, 28 disk tray guide, 29, 30, 31, 32, 33, 34 detection switch. 35 ... Disc tray, 36 ... Door, 3
7 disk cartridge, 37a disk, 3
7b ... clamper, 38 ... cartridge carrier, 3
9 ... Clamper, 40 ... Turntable, 41 ...
Claw, 42 ... Single optical disk

Claims (3)

[Claims] An optical disk recording / reproducing apparatus for recording / reproducing both a single optical disk and an optical disk in a disk cartridge with a single device, wherein an opening for inserting the disk cartridge, the single optical disk is positioned and A disk tray including a single optical disk mounting portion on which a disk cartridge is positioned and a disk cartridge mounting portion on which a disk cartridge is positioned and mounted; and a disk cartridge inserted through an opening of the disk tray and mounted on the mounting portion. An optical disk recording / reproducing apparatus comprising: a shutter opening / closing arm that opens and closes a shutter of a disk cartridge when the optical disk is mounted. 2. The optical disk recording / reproducing apparatus according to claim 1, wherein, when loading the single optical disk, a rear end of the disk tray pushes a shutter opening / closing arm backward to retreat. apparatus. 3. The optical disk recording / reproducing apparatus according to claim 1, wherein an unloading amount of the disk tray when unloading the optical disk is determined when unloading the single optical disk and unloading the disk cartridge. An optical disc recording / reproducing apparatus characterized in that the recording / reproducing apparatus changes in two stages between loading and loading. [0001]