JP2856528B2 - Optical disk drive - Google Patents

Description

The present invention relates to a double-sided recording / reproducing optical disk device.

(Prior Art) As an optical disk device, a set of an optical head and a magnetic field applying means is mounted on a carriage opposed to the end of two arms sandwiching a magneto-optical disk so as to be adjacent to and opposite to a circumferential direction of the magneto-optical disk. A linear drive mechanism is provided so that they can be accessed over the entire radial recording area of the magneto-optical disk, thereby enabling recording / reproducing / erasing on both sides without reversing the magneto-optical disk. Such a technique is disclosed in, for example, JP-A-61-208653.

Although not yet publicly known, the following are proposed technologies. That is, two optical heads are provided so as to sandwich the magneto-optical disk, and can be independently driven linearly so as to be accessible over the entire radial recording area of the magneto-optical disk. Magnetic field applying means is provided at a position facing each optical head. A technology that enables recording / reproducing / erasing on both sides by providing the entire area of the recording area in the radial direction of the magneto-optical disk, as well as reducing the weight of the movable part during access and enabling high-speed access. It is.

Furthermore, in recent years, an optical disk, which is an information recording medium that is housed in a cartridge and can be inserted into and removed from an optical disk device, so that the information recording medium has portability, has become popular.

When these technologies are combined, the following technologies are grasped.

That is, an optical disc device in which a cartridge containing an optical disc capable of recording / reproducing information on both sides can be inserted and removed, and a spindle motor for driving a turntable on which the optical disc is mounted and a turntable for the optical disc. A first optical head for irradiating a light beam on a surface on which it is mounted to record / reproduce information, and a second optical head for irradiating a light beam on a reflection side of the surface to record / reproduce information; A head, first guide means for guiding the first optical head in a radial direction of the optical disk, first drive means for moving the first optical head along the first guide means, and second optical means Second guide means for guiding a head in a radial direction of the optical disc;
An optical disc device having a second drive unit for moving the second optical head along a guide unit.

On the other hand, there is known an optical disk device of a type in which an optical head is provided so as to face only one surface of an optical disk, in which a turntable is inserted into a cartridge to chuck and rotate the optical disk.

In this type, the cartridge is held so as to surround the cartridge, and is reciprocated in the direction of the rotation axis of the turntable at least between a position where the optical disk is mounted on the turntable and a position where the optical disk is separated from the turntable. It has a holder.

(Problems to be Solved by the Invention) In an optical disk apparatus having optical heads for recording / reproducing on both sides of an optical disk, a case where a turntable is inserted into a cartridge and the optical disk is chucked is used. When trying to exchange information by bringing the optical head as close to the optical disk as possible,
When the cartridge is inserted and removed, the cartridge and the cartridge holder interfere with the optical head.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical disk apparatus which can eliminate the interference between the second optical head and the cartridge holder and the second optical head and the cartridge when the cartridge is inserted and removed, and can insert and remove the cartridge smoothly.

(Means for Solving the Problems) In order to achieve the above object, an optical disk device according to the present invention is an optical disk device in which a cartridge containing an optical disk capable of recording / reproducing information on both sides can be inserted and removed. A spindle motor for rotating a turntable on which the optical disk is mounted, a first optical head for recording / reproducing information by irradiating a light beam on a surface on the side where the optical disk is mounted on the turntable; A second optical head for recording / reproducing information by irradiating a light beam on a surface on a reflection side of the surface, a first guide means for guiding the first optical head in a radial direction of the optical disk, and the first guide First driving means for moving the first optical head along means, and second guiding means for guiding the second optical head in a radial direction of the optical disk. And an optical disk device having a second drive unit for moving the second optical head along the second guide unit, wherein the optical disk device is held so as to surround the cartridge, and at least a position at which the optical disk is mounted on the turntable and A cartridge holder is provided which is reciprocated in the direction of the rotation axis of the turntable between a position where the optical disk is separated from the turn tail, and at least the second guide means and the second drive means are attached to the turntable. The second optical head extends movably to the outside of the outer edge of the cartridge when the optical disc is mounted, and the side of the cartridge holder on the side where the second guide means is extended. A notch is provided to allow passage of the second optical head, and the second optical head When access was to be accessed through the notch.

(Operation) Since the cartridge holder is driven to change the position of the turntable relative to the turntable in the rotation axis direction of the turntable, the turntable is outside the cartridge insertion / removal area when the cartridge is inserted / removed. Since the second guide means and the second drive means extend outside the outer edge of the cartridge, the second optical head can be retracted out of the insertion / removal area of the cartridge, and the cutout provided on the side surface of the cartridge holder. Chipping makes this retraction easier.

(Embodiment) In FIGS. 1 and 2, reference numeral 1 denotes a cartridge, on which optical discs 2 capable of recording / reproducing information are stored on both sides. The cartridge 1 is inserted through an insertion port 9 shown in FIG. 3 when recording / reproducing information, reaches the cartridge holder 3, and is mounted. Press the eject button 10 to remove.

Reference numeral 4 denotes a turntable on which the optical disk 2 is mounted, and is driven by a spindle motor 5.

On the lower side of the cartridge holder 3, a first optical head H1,
The second optical heads H2 are respectively located on the upper side. First
The optical head H1 irradiates a light beam onto the surface on which the optical disc 2 is mounted on the turntable 4 to record / reproduce information, and the second optical head H2 is mounted on a surface opposite to the above surface. The recording / reproduction of information is performed by irradiating a light beam.

The first optical head H1 is guided in the radial direction of the optical disk 2 mounted on the turntable by rail-shaped first guide means G1, and as shown in FIG. , The first composed of the permanent magnet 8
It is designed to be driven by driving means D1.

The driving system of the second optical head H2 is also similar to the driving system of the first optical head H1, and the second guide means G2 and the second
Driving means D2 is provided. However, the second guide means G2 and the second drive means D2 extend so as to guide the second optical head H2 to the outside of the cartridge holder in the radial direction of the optical disk.

The cartridge holder 3 is in an operation state (see FIG. 2) in which the optical disc 1 is mounted on the turntable 4 and is rotationally driven to perform recording / reproduction, and a non-operation in which the optical disc 1 is inserted into and removed from the turntable. It is moved in the rotation axis direction VV of the turntable between the state (see FIG. 1).

In the non-operating state (see FIG. 1), no interference occurs because the second optical head H2 on the opposite side of the spindle motor 5 has escaped from the vertical movement area of the cartridge 1.

In the operating state (see FIG. 2), the optical disk 2 is driven to rotate, and the optical heads H1 and H2 can access any track on the optical disk 2 by the guide means and the drive means as shown in FIG.

Next, with reference to FIGS. 5 and 6, the process from the insertion of the cartridge 1 to the operation state will be described.

In FIG. 5, the shutter opener 11 is urged to rotate counterclockwise about the shaft 12 by a spring (not shown), and when the cartridge 1 is inserted against the spring force, The shutter opener 11 is pushed by the carton ridge 1 and pivots clockwise, and its tip engages with the end of the shutter 17 to open the shutter 17.

As shown in FIG. 6, a pin 13 is provided on the side surface of the cartridge holder 3, and is inserted into the long hole 14A of the cam member 14 and the long hole 15A of the horizontal plate 15 as an immovable member.

The movement of the cartridge holder 3 in the insertion direction of the cartridge 1 is restricted by the elongated hole 15A of the horizontal plate 15. The cam member 14 is provided with a gear on the outer periphery and meshes with a gear (23) rotated by the motor 18.

When the cartridge 1 is completely inserted as shown in FIG.
Is pressed, the signal is transmitted to the controller 20, and the stopper 21 is rotated about the shaft 22 by a drive mechanism (not shown) to regulate the movement of the cartridge 1 and the motor 18 in FIG. And the cartridge holder 3
Is guided by the elongated holes 14A and 15A and moves in the direction of the rotation axis of the turntable, that is, descends, and the optical disc 22 is mounted on the turntable, and the optical disk 22 enters an operating state.

When removing the cartridge 1 from the operation state, the third
When the eject button 10 shown in the figure is pressed, the controller
20 detects that the second optical head H2 is retracted in the cartridge insertion direction. At this time, as shown in FIG. 6, there is a notch 24 on the side surface of the cartridge holder 3, so that the second optical head
H2 passes through the notch 24 and is located outside the movement area of the cartridge holder 3 in the direction of the rotation axis of the turntable 4, and the cartridge holder 3 moves in the direction of the rotation axis of the turntable 4. Also the second optical head H2
Does not interfere with the cartridge holder 3 and, of course, cannot be in contact with the cartridge 1 in the cartridge holder 3. Subsequently, the motor 18 is rotated in the reverse direction to drive the cam member 14, and the cartridge holder 3 is raised. Finally, the stopper 21 is released and the cartridge 1 is ejected by the spring force of the shutter opener 11 (fifth embodiment).
FIG. (A)).

In the embodiment described above, the cartridge holder 3 is driven so as to change its position with respect to the turntable 4, so that the cartridge 1 does not interfere with the turntable 4 when the cartridge 4 is inserted or removed.

Further, the second optical head H2 can be retracted to the outside of the cartridge holder 3 in the radial direction of the optical disc by the second guide means G2 and the second drive means D2,
As described above, when the cartridge 1 is inserted into and removed from the cartridge holder 3, the cartridge holder 3 and the second optical head H 2 may interfere with each other even if the cartridge holder 3 performs the movement of changing the position in the rotation axis direction of the turntable 4. Be avoided.

When interference between the side surface of the cartridge holder 3 and the second optical head H2 occurs during the retreat of the second optical head H2, the second guide means G2 is provided on the cartridge holder 3
This notch is formed by forming a suitable notch 24 on the side where the second optical head H2 is extended on the side where the second optical head H2 is extended.
The second optical head 2 can be kept at the height position as close as possible to the optical disk via the 24 and retracted, so that interference with the cartridge holder 3 and the cartridge 1 can be avoided.

(Effect of the Invention) According to the present invention, interference between the cartridge and the second optical head and interference between the second optical head and the cartridge holder during insertion / removal of the cartridge are eliminated, and smooth insertion / removal of the cartridge is enabled. An optical disk device can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are diagrams for explaining the operation state of an optical disk device according to the present invention, FIG. 3 is a perspective view of the optical disk device, and FIG. 4 is guide means and driving of an optical head. FIG. 5 is a perspective view illustrating the mounting process of the cartridge to the cartridge holder, and FIG. 6 is a perspective view illustrating the driving means of the cartridge holder. 1 ... cartridge, 2 ... optical disk, 3 ... cartridge holder, 4 ... turntable, 24 ... notch,
D2: second drive means, G2: second guide means, H2: second optical head, V-V: rotational axis direction of the turntable.

Continuation of front page (58) Fields investigated (Int.Cl. ⁶ , DB name) G11B 21/12 G11B 21/02 G11B 17/04 G11B 11/10 G11B 7/085

Claims (1)

(57) [Claims] 1. An optical disk device in which a cartridge containing an optical disk capable of recording / reproducing information on both sides can be inserted / removed, wherein a spindle motor for rotating and driving a turntable on which the optical disk is mounted; A first optical head for irradiating a light beam on a surface on the side mounted on the turntable to record / reproduce information; and a recording / reproducing of information by irradiating a light beam on a reflection side surface of the surface. A second optical head, first guide means for guiding the first optical head in a radial direction of the optical disc, first drive means for moving the first optical head along the first guide means, A second guide means for guiding the optical head in a radial direction of the optical disk;
An optical disc device having a second driving means for moving the second optical head along a guide means, wherein the optical disc apparatus is held so as to surround the cartridge, and at least a position where the optical disc is mounted on the turntable and the optical disc is the turntable. A cartridge holder that is reciprocated in the direction of the rotation axis of the turntable between a position separated from the cartridge and at least the second guide means and the second drive means, wherein the optical disk is mounted on the turntable. The second position from the outer edge of the cartridge when
An optical head extending so as to be movable;
A notch is provided on the side of the cartridge holder on which the guide means is extended to allow the second optical head to pass therethrough. When the second optical head accesses the optical disk surface, the notch is accessed through the notch. An optical disc device characterized by performing: