JP2005092995A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device which can move a disk tray by a prescribed distance, without a circuit or a switch for detecting the position of the disk tray. <P>SOLUTION: The optical disk device 10 is provided with: the disk tray 11 for carrying an optical disk; a stepping motor 12 for driving the disk tray 11; a driving circuit 13 for controlling the driving of the stepping motor 12; a microcomputer 14 for controlling the driving circuit 13; and an opening/closing switch 15 provided to an operational part on which a user operates. When the opening/closing switch 15 is pressed down, the microcomputer 14 controls the driving circuit 13 so that a prescribed pulse is applied to the stepping motor 12, and the stepping motor 12 is rotated by a prescribed angle. The disk tray 11 is moved, and is stopped at the position according to the rotational angle of the stepping motor 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to an optical disc apparatus that transports an optical disc by moving a disc tray.

One method of setting an optical disk in an optical disk apparatus is a disk tray method. In this method, an optical disk is placed and transported on a disk tray that is opened and closed by a motor. The opening / closing operation of the disk tray, that is, the driving of the motor is controlled by the loading control device.

For example, the loading control device of the optical disc recording / reproducing apparatus disclosed in Patent Document 1 applies the drive voltage to the motor to move the disc tray for a predetermined time longer than the time for moving the disc tray from the open position to the closed position. ing. Further, the motor is stopped when the driving current of the motor after starting exceeds a predetermined current value, or when the driving voltage falls below a predetermined voltage value.
JP 2002-367263 A

In the above Patent Document 1, a DC motor is used. Since this motor cannot grasp the position of the disk tray, it is necessary to control the motor by controlling the motor driving time or detecting a change in the driving voltage or driving current. As a result, the load is applied to the motor even after the disk tray is stopped, and the life of the motor is shortened. Further, a circuit for detecting the drive voltage or drive current is also required.

In general loading control devices, a switch for detecting the disk tray position is provided, and the motor is controlled based on a detection signal of the switch. Also in this case, since the DC motor does not stop suddenly, it is detected by the position detection switch, and a load is applied to the motor even after the disk tray stops. Further, the provision of the detection switch causes an increase in cost.

The present invention, without providing a circuit or switch for detecting the position of the disk tray,
An object of the present invention is to provide an optical disc apparatus capable of moving a disc tray by a predetermined distance.

In order to achieve the above object, an optical disc apparatus of the present invention includes a disc tray for transporting an optical disc, a stepping motor for driving the disc tray, and a loading control unit for controlling the stepping motor.

In the above optical disk apparatus, the loading control unit applies a predetermined pulse to the stepping motor, the stepping motor rotates by a predetermined angle, and the disk tray moves to an open position or a closed position.

According to another aspect of the present invention, there is provided an optical disc apparatus comprising: a disc tray that transports an optical disc; a motor that drives the disc tray; a loading control unit that controls the motor; and an operation unit that is operated by a user. When the disk tray opening / closing switch provided in the operation unit is pressed, the loading control unit applies a predetermined pulse to the stepping motor, and the stepping motor rotates at a predetermined angle proportional to the predetermined pulse. The disc tray moves to an open position or a closed position.

In this way, by using the stepping motor as the disk tray driving motor, the stepping motor is rotated and stopped as much as necessary to open and close the disk tray, so that the disk tray is securely stopped at the open position or the closed position. . Therefore, it is possible to simplify the circuit and reduce the component cost without providing a circuit and a switch for detecting the position of the disk tray as in the prior art. Furthermore, since the load is not applied to the motor when the disk tray reaches the open position or the closed position, the life of the drive components of the disk tray and the motor is extended.

FIG. 1 is a block diagram showing a configuration of a main part of the optical disc apparatus. The optical disc apparatus 10 includes a disc tray 11 that carries an optical disc, a stepping motor 12 that drives the disc tray 11, a drive circuit 13 that controls the drive of the stepping motor 12, a microcomputer 14 that controls the drive circuit 13, and a user And an open / close switch 15 provided in an operation unit (not shown) to be operated. The drive circuit 13 and the microcomputer 14 may be collectively referred to as a loading control unit. The stepping motor 12 is proportional to the number of pulses given,
This motor has a function of rotating by a certain angle.

FIG. 2 is a flowchart showing the loading operation of the optical disc apparatus 10. In step S20, it is determined whether or not the disk tray opening / closing switch 15 has been pressed. When the disk tray opening / closing switch 15 provided in the operation unit is pressed, the process proceeds to step S21, where the microcomputer 14 controls the drive circuit 13 to apply a predetermined pulse voltage to the stepping motor 12. If it does so, it will progress to step S22 and the stepping motor 12 will rotate only the predetermined angle proportional to the given predetermined pulse. When the stepping motor 12 is driven, the process proceeds to step S23, and the disk tray 11 moves to the open position or the closed position.

Here, a predetermined angle of the stepping motor 12 is determined from the moving distance of the disc tray 11 from the open position to the closed position or from the closed position to the open position, and the stepping motor 1 is determined from this predetermined angle.
2 is determined.

For example, when the disk tray 11 is in the closed position, when the disk tray opening / closing switch 15 is pressed, the microcomputer 14 controls the drive circuit 13 to apply a predetermined pulse to the stepping motor 12 so that the stepping motor 12 is moved by a predetermined angle. Turn forward. When the stepping motor 12 rotates forward, the disk tray 11 starts moving from the closed position toward the open position, and stops at a position (open position) corresponding to the rotation angle of the stepping motor.

On the other hand, when the disk tray 11 is in the open position, when the disk tray open / close switch 15 is pressed, the microcomputer 14 controls the drive circuit 13 to apply a predetermined pulse to the stepping motor 12 so that the stepping motor 12 is moved by a predetermined angle. Reverse. Stepping motor 1
When 2 is reversed, the disk tray 11 starts moving from the open position to the closed position, and stops at a position (closed position) corresponding to the rotation angle of the stepping motor.

Thus, by rotating the stepping motor 12 as much as necessary to open and close the disk tray 11 and stopping, the disk tray stops at the open position or the closed position. Therefore, it is possible to simplify the circuit and reduce the component cost without providing a circuit and a switch for detecting the position of the disk tray as in the prior art. Furthermore, since the load is not applied to the motor while the disk tray 11 has reached the open position or the closed position, the life of the disk tray drive components and the motor is extended.

The present invention can be used in a disc tray type optical disc apparatus that carries an optical disc on a disc tray and transports it, and a disc such as a CD or a DVD can be used as the optical disc.

It is a block diagram which shows the structure of the principal part of the optical disk apparatus of this invention. 4 is a flowchart showing a loading operation of the optical disc apparatus of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical disk apparatus 11 Disc tray 12 Stepping motor 13 Drive circuit 14 Microcomputer 15 Open / close switch

Claims (3)

In an optical disc apparatus comprising a disc tray for conveying an optical disc, a motor for driving the disc tray, a loading control unit for controlling the motor, and an operation unit operated by a user,
The motor is a stepping motor;
When the disk tray opening / closing switch provided in the operation unit is pressed,
The loading control unit gives a predetermined pulse to the stepping motor,
The stepping motor rotates a predetermined angle proportional to a predetermined pulse,
An optical disc apparatus, wherein the disc tray moves to an open position or a closed position. In an optical disc apparatus comprising a disc tray for transporting an optical disc, a motor for driving the disc tray, and a loading control unit for controlling the motor.
An optical disc apparatus, wherein the motor is a stepping motor. The loading control unit gives a predetermined pulse to the stepping motor,
The stepping motor rotates a predetermined angle,
3. The optical disc apparatus according to claim 2, wherein the disc tray moves to an open position or a closed position.

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