JPH0668160U - Magneto-optical recording / reproducing device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a magneto-optical recording / reproducing apparatus which avoids an increase in the torque of a motor when recording information on a disk and avoids an increase in the size of the motor. [Structure] The disc 9 by the spindle motor 1 at the time of recording information on the disc 3 by the microcomputer 9
After the start of the rotation, the magnetic head 6 is controlled to come into contact with the disk 3. Since the magnetic head 6 is not in contact with the disk 3 at the start of rotation, it is not necessary to increase the torque of the spindle motor 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magneto-optical recording / reproducing apparatus for recording / reproducing information on / from a magneto-optical disk.

[0002]

[Prior art]

 A structure shown in FIG. 5 is known as a magneto-optical recording / reproducing apparatus for recording / reproducing information on / from a magneto-optical disk. A disk 3 as a magneto-optical disk is mounted on a turntable 2 which is rotated by a spindle motor 1. Information is recorded on the disk 3 below the disk 3 by irradiating one surface with laser light. A pickup 4 for optically reading is arranged on a slide shaft 5 so as to be movable in the radial direction, while a magnetic head 6 for writing information on the other surface of the disk 3 by magnetic field modulation is provided above the disk 3. It is arranged so that it can contact the disk 3 by means of a gimbal 7.

In such a magneto-optical recording / reproducing apparatus, the operation of recording information on the disk 3 is performed by the procedure shown in the flowchart of FIG. First, when the REC (recording) command is received in step 01, the pickup 4 and the magnetic head 6 move to the innermost peripheral sides of the lower and upper surfaces of the disk 3 as in step 02. Next, as in step 03, the magnetic head 6 contacts the upper surface of the disk 3 as shown in FIG. 5, and then the focus search of the pickup 4 is performed in step 04. The tracking servo is turned on, the spindle kick is performed as in step 06, and the disk 3 starts rotating.

Next, in step 07, it is judged whether or not the spindle servo is OK, and if it is OK, TOC reading is performed as in step 08, and recording is started as in step 09.

[0005]

[Problems to be solved by the device]

 By the way, in the conventional magneto-optical recording / reproducing apparatus, when the information is recorded, the magnetic head is in contact with the disk at the start of rotation of the disk, so that static friction occurs between the disk and the magnetic head. Therefore, the torque of the spindle motor has to be increased, and there is a problem that the motor becomes larger and the load increases accordingly.

That is, as the motor becomes larger, it is necessary to increase the output of the driver circuit, and as a result, it becomes difficult to reduce the size and power consumption of the magneto-optical recording / reproducing device.

The present invention has been made in consideration of the above problems, and an object thereof is to provide a magneto-optical recording / reproducing apparatus which avoids an increase in size of a motor and thereby eliminates a burden associated therewith. It is what

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention corresponds to a disk rotating means for rotating a magneto-optical disk, a laser light irradiating means for irradiating one surface of the magneto-optical disk with laser light, and the laser light irradiating means. In a magneto-optical recording / reproducing apparatus equipped with a magnetic head moving means for bringing a magnetic head for information recording into contact with the other surface of the magneto-optical disk, the magnetic head moving means is a disk rotating means for urging the disk rotating means. It is characterized in that the magnetic head is brought into contact with the magneto-optical disk after the rotation is started.

[0009]

[Action]

 The magnetic head moving means brings the magnetic head into contact with the magneto-optical disk after the disk rotating means is energized to start the rotation of the disk. As a result, when recording information, the magnetic head is not in contact with the disk at the start of rotation of the disk, so there is no need to increase the torque of the motor, and therefore it is possible to avoid increasing the size of the motor.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a magneto-optical recording / reproducing apparatus of the present invention. 1 is a spindle motor, 2 is a turntable, 3 is a disk, 4 is a pickup, 5 is a slide shaft, 6 is a magnetic head, and 7 is a magnetic head. The configuration of the gimbal is the same as the conventional one.

Reference numeral 8 denotes a REC command unit that generates a REC command when information is recorded on the disc 3, and 9 receives a REC command from the REC command unit 8 to perform overall control operation necessary for recording, Particularly in the case of this embodiment, the microcomputer has a function of controlling the magnetic head up / down drive unit 10 so that the magnetic head 6 is brought into contact with the upper surface of the disk 3 after the rotation of the disk 3 is started by the spindle motor 1. . Reference numeral 11 is a servo amplifier which is controlled by the micro computer 9 to control the operations of the spindle motor 1 and the pickup 4, and 12 is an RF amplifier which amplifies the detection signal of the pickup 4 and outputs it to the micro computer 9 and the servo amplifier 11. .

Next, the first operation of recording information on the disk 3 in the apparatus of this embodiment will be described with reference to the flowchart of FIG. First, when a REC (recording) command is received in step 01, the pickup 4 and the magnetic head 6 move to the innermost peripheral sides of the lower and upper surfaces of the disc 3 as in step 02. Next, the pick-up 4 starts the focus search as in step 03, the tracking servo is turned on as in step 04, and the spindle kick is performed as in step 05 so that the magnetic head 6 as shown in FIG. Start rotation without contact.

Next, after a timer reset is performed in step 06, it is determined in step 07 whether or not a predetermined time X has elapsed. If X has elapsed, the magnetic field is determined in step 08. The head 6 contacts the upper surface of the disk 3. Subsequently, in step 09, it is judged whether or not the spindle servo is OK, and if it is OK, the TOC is read as in step 10, and the recording is started as in step 11.

According to this embodiment, the magnetic head 6 is not in contact with the disk 3 at the start of disk rotation when information is recorded, and the contact of the magnetic head 6 with the disk 3 causes the disk rotation. Since it is performed after the start, it is not necessary to increase the torque of the spindle motor 1. Therefore, the spindle motor 1 can be prevented from increasing in size, and accordingly, the driver circuit does not need to have a high output, so that the magneto-optical recording / reproducing apparatus can be downsized and the power consumption can be reduced.

FIG. 4 is a flow chart for explaining the second operation at the time of recording information in the apparatus of this embodiment. Compared with the first operation of FIG. 3, in step 06 in FIG. The difference is that it is judged whether or not it is OK, and if it is OK, the magnetic head 6 is brought into contact with the upper surface of the disk 3 as in step 07. Even with such a second operation, the same effect as that of the first operation can be obtained with only a slightly different method.

[0016]

[Effect of device]

 As described above, according to the present invention, the magnetic head is brought into contact with the disk to record information after the disk starts to be rotated, so that it is necessary to increase the torque of the motor for rotating the disk. This eliminates the need to increase the size of the motor and eliminates the burden associated with it.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a magneto-optical recording / reproducing apparatus of the present invention.

FIG. 2 is a side view showing the position of a magnetic head when recording information on a disk in this embodiment.

FIG. 3 is a flowchart showing a first operation in this embodiment.

FIG. 4 is a flowchart showing a second operation in this embodiment.

FIG. 5 is a side view showing the position of a magnetic head when recording information on a disk in a conventional example.

FIG. 6 is a flowchart illustrating an operation in a conventional example.

[Explanation of symbols]

 1 Spindle motor 3 Disk 4 Pickup 6 Magnetic head 9 Microcomputer

Claims (1)

[Scope of utility model registration request] 1. A disk rotating means for rotating a magneto-optical disk, a laser light irradiating means for irradiating one surface of the magneto-optical disk with laser light, and another surface of the magneto-optical disk corresponding to the laser light irradiating means. In a magneto-optical recording / reproducing apparatus having a magnetic head moving means for contacting a magnetic head for information recording, the magnetic head moving means is a magnetic head after the disk rotating means is energized to start rotation of the disk. A magneto-optical recording / reproducing apparatus, wherein the magneto-optical disk is brought into contact with the magneto-optical disk.