JPH05266611A - Disc drive unit - Google Patents

Abstract

PURPOSE:To realize high speed access at the time of reading or writing of data. CONSTITUTION:First read/write head 6 is positioned at one surface of a disc 2 and a second read/write head 7 is positioned at the other surface of the disc 2. When it is required to gain access from one surface to the other surface of the disc 2, switching is made simply from the first read/write head 6 to the second read/write head 7 without moving the read/write head from one surface to the other surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for reading or writing data from an optical disk or the like.

[0002]

2. Description of the Related Art In optical discs such as compact discs and laser discs, data may be recorded on both the front and back sides in order to increase the recording amount.

Generally, an optical disk drive device for reading or writing data from such an optical disk is
The structure is shown in FIG.

In the figure, reference numeral 61 indicates a cartridge for accommodating the optical disk 62. This optical disk 62
Is rotatable by a spindle motor 63 in both forward and reverse directions, and a movement guide mechanism 64 is arranged so as to straddle the front and back of the optical disc 62.
A carriage base 66, on which the optical system 65 is placed, is moved along.

Then, the optical system 65 is connected to the A of the optical disk 62.
By moving from the surface B to the surface B and from the surface B to the surface A, reading or writing of data on both front and back surfaces is performed.

However, in such an optical disk drive device, since it takes time to move the optical system 65 from the A surface to the B surface and from the B surface to the A surface of the optical disk 62, it is necessary to read or write the data. There was a problem that access was delayed.

[0007]

In the conventional disk drive device corresponding to the disk in which data is recorded on both front and back surfaces as described above, it takes time to move the read / write head to the other surface. However, there is a problem in that access is delayed when reading or writing data.

Therefore, an object of the present invention is to provide a disk drive device capable of speeding up access when reading or writing data.

[0009]

In order to solve the above problems, the present invention reads a data from a spindle motor which rotates a mounted disk in both forward and reverse directions and a disk which is rotated by the spindle motor. Or a first and a second read / write head for writing, and a first and a second read / write head that are arranged so as to straddle the front and back of the disk, and move the first and second read / write heads between the front and back of the disk. 1st and 2nd movement guide mechanism, and said 1st and 2nd
Control means for controlling the movement of the read / write head.

The second invention is based on the above invention.
The first and second movement guide mechanisms are arranged on a plane orthogonal to the disc loading direction.

[0011]

In the present invention, the first read / write head is located on one side of the disk and the second read / write head is located on the other side of the disk. When access from one side of the disk to the other side is required, the read / write head to be accessed is simply read by the first read / write head without moving the read / write head to the other side. It suffices to switch from the write head to the second read / write head. Therefore, it is possible to speed up access when reading or writing data.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of an optical disk drive device according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a cartridge for housing the optical disk 2. The cartridge 1 has a window portion in which the contained optical disk 2 can be reproduced on both sides as it is. Further, the optical disk 2 is rotatable by a spindle motor 10 in either forward or reverse directions.

A first movement guide mechanism 3 and a second movement guide mechanism 4 are arranged on both sides of the optical disc 2 so as to straddle both sides of the optical disc 2.

The first movement guide mechanism 3 guides an optical system, which will be described later, by a linear motor or a rack gear, for example, and is arranged in parallel with the upper linear guide portion 3a and the upper linear guide portion 3a. The lower straight guide portion 3c and the arc-shaped guide portion 3b connecting the straight guide portions 3a and 3c are integrally formed.

Similarly, the second movement guide mechanism 4 is constructed by integrally forming the upper linear guide portion 4a, the lower linear guide portion 4c, and the arcuate guide portion 4b.

The first and second movement guide mechanisms 3,
Reference numeral 4 is fixed to the main body of the apparatus via a base member 5, and has a structure that cannot be moved when the optical disk is attached or detached.

Then, a first carriage base 8 on which an integrated first optical system 6 is placed on the first movement guide mechanism 3.
However, the second carriage base 9 on which the integrated second optical system 7 is placed moves on the second movement guide mechanism.

The optical system is not limited to this, and the movable part of the separation optical system can be arranged at the positions of the first optical system 6 and the second optical system 9.

FIG. 2 is a diagram showing a circuit configuration of the optical disk drive device.

In the figure, reference numeral 22a denotes a first carriage for controlling the movement of the first carriage base 8 on which the first optical system 6 is mounted.
2b is a second control circuit for controlling the movement of the second carriage base 9 on which the second optical system 7 is mounted.

The first control circuit 22a includes a first optical system 6
The position of the first carriage base 8 on which the first optical system 6 is mounted is recognized by the track count circuit 23a that counts the number of tracks of the optical disc 2 detected via the linear motor control circuit 24a. The movement of the first carriage base 8 on which the optical system 6 of FIG.

Similarly, the second control circuit 22b also has a track count circuit 23b and a linear motor control circuit 24b.
And controls the movement of the second carriage base 9 on which the second optical system 7 is mounted.

The first control circuit 22a and the second control circuit 22b control the rotation of the spindle motor 10 in the forward and reverse directions via the motor control circuit 25.

The optical disk drive device thus constructed operates as follows. First, the case of continuously reproducing from the A side to the B side will be described.

Here, the first and second carriage bases 8 and 9 are designed to be guided from the inner circumference of the optical disk 2 toward the outer circumference.

Then, after the first carriage base 8 on which the first optical system 6 is mounted reaches the outermost position and the reproduction of the surface A is completed, the second optical system 7 on the lower side is mounted on the second carriage base 8. The carriage base 9 is waiting at the innermost re-circumferential position which is the reproducing portion at the beginning of the B side, and at the same time, the spindle motor 10 is reversely rotated and the second carriage base 9 is moved in the disc outer peripheral direction in the same manner as the A side. Then, the B side is accessed. From side B to A
Switching the playback to the plane is performed in the same manner.

Therefore, in the optical disk drive device of the present embodiment, the reproduction from the A side to the B side and the reproduction from the B side to the A side are continuously performed.

Next, a case where one surface is randomly accessed will be described.

First, as shown in FIG. 4, a first carriage base 8 and a second optical system in which the first optical system 6 is placed at an arbitrary position on one surface of the optical disk 2, for example, the A surface. Both of the second carriage bases 9 carrying the respective 7 are present.

When accessing a predetermined position on the optical disk 2, the optical system closer to the position is moved.

Therefore, in such a case, the access time can be shortened.

FIG. 3 is a perspective view showing the appearance of this optical disk drive device.

As shown in the figure, the front surface 12 (XY surface) into which the cartridge 1 is inserted, the cartridge insertion opening 13 and the position 15 in which the cartridge 1 is housed are horizontal, and the cartridge 1 is moved in the Z direction. It has a horizontal loading mechanism 14 for moving it.

Then, the cartridge 1 inserted from the cartridge insertion port 13 has the horizontal loading mechanism 14
It is loaded at the position 15 stored in.

After that, as shown in FIG. 1, the cartridge 1 has the upper and lower linear guide portions 3a, 3c, 4a, 4c.
It is clamped by the magnet chuck 19.

Thus, in the optical disk drive device of the present embodiment, it is possible to make the device thinner in the X direction and to make the depth in the Z direction compact, and further, the movement guide mechanism having two access times and the optical system. By having the above, it is possible to freely access from the A side to the B side and from the B side to the A side, and it is possible to speed up the access time.

Next, another embodiment of the present invention will be described.

FIG. 5 is a sectional view of the optical disk drive device of this embodiment.

In the optical disk drive device shown in the figure, a rack groove 17 is formed on the first and second movement guide mechanisms 3 and 4.
A self-propelled motor 1 for driving is provided on this rack.
The first and second carriage bases 7 and 9 provided with 8 are meshed with the groove 17 of the rack, and are pivotally supported by gears and pinions.

In this case, although track counting cannot be performed at a higher speed than that of a linear motor, it is easy to manufacture, and the weight and cost of the movable portion of the access device can be reduced.

Although the above-described embodiments apply the present invention to an optical disk drive apparatus, the present invention is not limited to this and can be applied to other information recording / reproducing apparatus such as a magnetic disk.

[0044]

As described above, according to the present invention,
When access from one side of the disk to the other side is required, the read / write head to be accessed can be simply switched, so that access can be speeded up when reading or writing data. ..

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an optical disk drive device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a circuit configuration of an optical disk drive device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing an appearance of an optical disk drive device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view for explaining another effect of the optical disc drive device according to the embodiment of the present invention.

FIG. 5 is a sectional view of an optical disk drive device according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a conventional optical disc drive device.

[Explanation of symbols]

1 ... Cartridge, 2 ... Optical disc, 3 ... First movement guide mechanism, 4 ... Second movement guide mechanism, 6 ... First
Optical system, 7 ... second optical system, 8 ... first carriage base, 9 ... second carriage base, 10 ... spindle motor.

Claims (2)

[Claims] 1. A spindle motor for rotating a mounted disk in both forward and reverse directions, and first and second read / write operations for reading or writing data from the disk rotated by the spindle motor.
The write head and the first head are arranged so as to straddle the front and back of the disk.
And first and second movement guide mechanisms for moving the second read / write head between the front and back of the disk, and control means for controlling the movement of the first and second read / write heads. A disk drive device comprising: 2. The disk drive device according to claim 1, wherein the first and second movement guide mechanisms are arranged on a surface orthogonal to a direction in which the disk is loaded.