JPH04134751A - Optical disk device - Google Patents

Abstract

PURPOSE:To smoothly insert and eject a cartridge by extending a 2nd guide means for guiding a 2nd optical head and a 2nd driving means for moving the 2nd optical head along the 2nd guide means from an outer periphery of the cartridge to the outside when an optical disk is mounted on a turntable. CONSTITUTION:A 1st optical head H1 is guided in a radial direction of the optical disk 2 mounted on the turntable by a 1st guide means G1 of a rail-like fashion, and is driven by a 1st driving means D1. The driving system of the 1st optical head H1 applies correspondingly to the driving system of the 2nd optical head H2 as well, which is provided with the 2nd guide means G2 and the 2nd driving means D2. Then, these 2nd guide means G2 and 2nd driving means D2 are extended so as to enable the 2nd optical head H2 to be guided to the outside of a cartridge holder. By this method, interference between the cartridge 1 and the turntable 4 and also the cartridge 1 and the optical head H2 is eliminated, and the cartridge 1 is smoothly inserted and ejected.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a double-sided recording/reproducing type optical disc device.

(Prior art) As an optical disk device, there is a
Two sets of an optical head and a magnetic field applying means are installed adjacently and in opposite directions in the circumferential direction of the magneto-optical disk on a carriage placed opposite to the tip of the book arm, and these are integrated into the radial recording area of the magneto-optical disk. For example, Japanese Patent Laid-Open Publication No. 61-208653 discloses a technology that provides a linear drive mechanism that can be accessed over the entire area of the disk, thereby making it possible to record/play/erase on both sides of the magneto-optical disk without reversing the disk. There is.

In addition, although not yet publicly known, the following techniques are being proposed. That is, two optical heads are provided sandwiching a magneto-optical disk, and can be linearly driven to independently access the entire radial recording area of the magneto-optical disk, and a magnetic field applying means is provided at a position facing each optical head. By providing it so as to cover the entire radial recording area of the magneto-optical disk, recording/reproduction/erasing can be performed on both sides, and the weight of the moving parts during access is reduced.
This technology enables high-speed access.

Furthermore, in recent years, optical discs have become commonplace, in which an optical disc as an information recording medium is housed in a cartridge and can be inserted into and removed from an optical disc device, thereby providing portability to the information recording medium.

When these technologies are put together, the following technologies can be grasped.

In other words, it is an optical disc device in which a cartridge containing an optical disc that can record/reproduce information on both sides can be inserted and removed, and includes a spindle motor that rotationally drives a turntable on which the optical disc is mounted, and a spindle motor that rotates a turntable on which the optical disc is mounted. A first optical head that records/reproduces information by irradiating a light beam onto a surface to which it is mounted, and a second optical head that records/reproduces information by irradiating a light beam onto a surface on the reflection side of the above-mentioned surface. a head, a first guide means for guiding the first optical head in the radial direction of the optical disk, a first drive means for moving the first optical head along the first guide means, and a second optical head. a second guide means for guiding the head in the radial direction of the optical disk; and a second guide means for moving the second optical head along the second guide means.
This is an optical disc device having a driving means.

On the other hand, there is known an optical disc device in which an optical head is provided facing only one side of an optical disc, and a turntable is inserted into a cartridge to chuck and rotate the optical disc.

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

(Problem M to be solved by the invention) In an optical disc device having an optical head that performs recording/reproduction on both sides of an optical disc, a turntable is inserted into a cartridge to chuck the optical disc, and If an attempt is made to bring both optical heads as close to the optical disk as possible to exchange information, the cartridge and turntable and the cartridge and optical head will interfere.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disc device that eliminates interference between the cartridge and the turntable and between the cartridge and the optical head when inserting and removing the cartridge, and allows smooth insertion and removal of the cartridge.

(Means for Solving the Problems) In order to achieve the above object, in the optical disc device of the present invention, the cartridge is held so as to surround it, and at least the position where the optical disc is mounted on the turntable and the position where the optical disc is separated from the turntable are provided. a cartridge holder that is reciprocated in the direction of the rotational axis of the turntable between the position where the cartridge holder is moved, and at least a second guide means;
2nd I! The moving means is extended so that the second optical head can be moved to the outside of the outer edge of the cartridge when an optical disc is mounted on the turntable. Further, a notch is provided on the side surface of the cartridge holder on the side where the second guide means is extended, allowing the passage of the second optical head.

(Function) Since the cartridge holder is driven to change its position with respect to the turntable, the turntable is located outside the cartridge insertion/removal area when the cartridge is inserted/removed.

By extending the second guide means and the second drive means, the second optical head can be retracted from the cartridge insertion/removal area. The cutout also makes this retraction easier.

(Embodiment) In FIGS. 1 and 2, reference numeral 1 indicates a cartridge, which houses an optical disc 2 on both sides of which information can be recorded/reproduced. When recording/reproducing information, this cartridge 1 is inserted through an insertion opening 9 shown in FIG. 3, reaches inside the cartridge holder 3, and is mounted. To remove it, press the eject button 1o.

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

On the lower side of the cartridge holder 3 is a first optical head H1,
Second optical heads H2 are located on the upper side.

The first optical head H1 is connected to the optical disc 2 on the turntable 4.
Records information by shining a light beam onto the side that is attached to the
The second optical head H2 records/reproduces information by irradiating a light beam onto the surface opposite to the above-mentioned surface.

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

Similarly to the drive system of the first optical head H1, the drive system of the second optical head H2 is also provided with a second guide means G2 and a second drive means D2. However, these second
The guide means G2 and the second drive means D2 extend so as to be able to guide the second optical head H2 to the outside of the cartridge holder.

The cartridge holder 3 can be operated in an operating state (see Fig. 2), in which the optical disc 1 is mounted on a turntable 4 and rotated to perform recording/reproduction, and in an inoperative state, in which the optical disc 1 is inserted into and removed from the turntable by the cartridge 2. (see FIG. 1), the turntable is moved in the rotational axis direction v-■.

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

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

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

In FIG. 5, the shutter opener 11 is rotated counterclockwise around a shaft 12 by a spring (not shown), and when the cartridge 1 is inserted against this spring force, The shutter opener 11 is pushed by the cartridge 1 and rotates 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 a long hole 14 of the cam member 14 is provided with a pin 13.
A and is inserted into a long hole 15A of the horizontal plate 15, which is an immovable member.

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

As shown in FIG. 5(b), when the cartridge 1 is completely inserted, the push switch 19 is activated by the cartridge 1.
is pressed, the signal is transmitted to the controller 20, and the stopper 21 is rotated around the shaft 22 by a drive mechanism (not shown), thereby regulating the movement of the cartridge 1 and causing the motor 18 in FIG. 6 to rotate in the direction of the arrow. Then, the cartridge holder 3 is guided by the elongated holes 14A and 15A, 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 becomes operational.

When removing cartridge 1 from the operating state.

When the eject button 10 shown in FIG. 3 is pressed, the controller 20 detects this and the second optical head H2 retreats in the cartridge insertion direction. At this time, as shown in FIG. 6, since there is a notch 24 on the side surface of the cartridge holder 3, the second optical head H2 is prevented from coming into contact with the cartridge holder 3.

Subsequently, the motor 18 is rotated in the opposite direction, the cam member 14 is driven, and the cartridge holder 3 is raised.

Finally, the stopper 21 is released and the shutter opener
The cartridge 1 is ejected by the spring force of 11.

In the embodiments described above, since the cartridge holder is driven to change its position with respect to the turntable, the cartridge does not interfere with the turntable when the cartridge is inserted or removed.

Further, the second guide means and the second drive means
Since the optical head can be retracted to the outside of the cartridge holder, interference between the cartridge holder and the second optical head can be avoided even when the cartridge holder moves to change its position with respect to the turntable, as described above. Ru.

When the second optical head is retracted, if interference occurs between the side surface of the cartridge holder and the second optical head,
This interference can also be avoided by forming a suitable notch that allows the optical head to pass through.

(Effects of the Invention) According to the present invention, it is possible to provide an optical disc that eliminates interference between the cartridge and the turntable and between the cartridge and the optical head when inserting and removing the cartridge, thereby enabling smooth insertion and removal of the cartridge.

[Brief explanation of drawings]

1 and 2 are diagrams illustrating the operating state of the optical disc device according to the present invention, FIG. 3 is a perspective view of the optical disc device, and FIG. 4 is a perspective view illustrating the guide means and drive means of the optical head. FIG. 5 is a diagram illustrating the process of mounting 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 disc, 3...
Cartridge holder, 4... Turntable, 24...
...Notch, D2...Second driving means, G2...Second
Guide means, H2... second optical head, v-■...
The direction of the turntable's rotation axis. ÷4 mouth ■ also 2 figure

Claims (1)

[Scope of Claims] 1. An optical disc device in which a cartridge containing an optical disc capable of recording/reproducing information on both sides is removably inserted, comprising a spindle motor that rotationally drives a turntable on which the optical disc is mounted; a first optical head that records/reproduces information by irradiating a light beam onto a side of the optical disc that is mounted on a turntable; and a first optical head that irradiates a light beam onto a reflective side of the surface to record/reproduce information. a second optical head for performing reproduction; a first guide means for guiding the first optical head in the radial direction of the optical disk; and a first guide means for moving the first optical head along the first guide means.
An optical disc device comprising: a drive means; a second guide means for guiding the second optical head in a radial direction of the optical disc; and a second drive means for moving the second optical head along the second guide means; holding the cartridge so as to surround it, and at least between a position where the optical disc is mounted on the turntable and a position where the optical disc is separated from the turntable;
A cartridge holder is provided that is reciprocated in the direction of the rotation axis of the turntable, and at least the second guide means and the second drive means are connected to the outer edge of the cartridge when the optical disc is mounted on the turntable. the second
An optical disc device characterized in that an optical head is extended so as to be movable. 2. The optical disc device according to claim 1, further comprising a notch provided on the side surface of the cartridge holder on the side where the second guide means is extended, through which the second optical head passes.