JP2002279716A - Disk unit and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage to a disk and failure in a disk unit of a slot loading system by detecting the abnormal disk insertion of an irregular shaped disks such as a star into the disk unit. SOLUTION: Operation abnormalities during disk loading are determined based on the state transition processes of switching parts for position detection or sensor parts which change states when the optical disk is moved by the rotation of a roller for disk loading. An operation is determined abnormal (S7), for example, when the switching parts other than a switching part 6 or the sensor parts are shifted to ON (S5) or when the switching part 6 is not shifted on ON over a predetermined time limit (a) (S6) after a switching part 5 is shifted to ON (S1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slot-loading type disk reproducing apparatus, a recording / reproducing apparatus, which automatically pulls an optical disk inserted into a disk insertion slot to a reproducing position in the apparatus, and a method for detecting an abnormal operation during disk loading. How to judge.

[0002]

2. Description of the Related Art In recent years, optical disks of various shapes have been sold in the market. Among them, there is a disk having a shape having a protruding portion such as a star or a character (hereinafter, a deformed disk).

When such a deformed disk is inserted into a slot loading type apparatus, the disk and the mechanical housing may be damaged due to the mechanical structure of the slot loading.

[0004] Unlike a tray-type reproducing apparatus in which a disk is loaded on a tray and then the disk is pulled into the apparatus, a slot-loading-type reproducing apparatus moves a disk by rotating rollers pressed against the disk, and guides the disk. The disc is drawn into the playback position in the playback device along a housing such as a pin. When the moving disk contacts and acts on these housings, the switches and the like that operate in conjunction with the housings are turned on and off.

When the disk is pulled in normally without being caught in the housing or the like, the mechanical control for pulling in the disk is normally performed, and the disk is fixed after being pulled in.

[0006]

However, when an odd-shaped disc is inserted into a slot-loading type reproducing apparatus, there is a possibility that a projection portion of the disc may be caught by a housing such as a guide pin. Therefore, the process of contacting the housing such as the guide pin becomes unstable, and normal control is not performed.

Conventionally, when an odd-shaped disk is caught on a casing or the like, a disk loading roller continues to rotate in a direction to pull in the disk. As a result, an excessive load is applied to the housing, which may cause a failure of the reproducing apparatus due to the damage of the housing, and a deformation or damage of the disk. Further, if the power is turned off after such an operation abnormality has occurred, the disk may not be able to be removed from the apparatus.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the damage of a disk and the failure of a disk device by detecting an abnormal disk insertion operation due to a deformed disk or the like.

[0009]

According to the disk device of the present invention, when such a deformed disk or the like is inserted, it is detected and discharged by using a switch, a sensor, or the like, so that damage to the disk and failure of the device can be prevented. prevent.

That is, the present invention relates to a slot loading type disk device for drawing an optical disk inserted into a disk insertion slot to a reproduction position in the device, comprising: a disk loading means for moving the optical disk into the device; A plurality of position detecting means for detecting the position of the optical disk moving in the apparatus by the loading means; and a state transition process of the plurality of position detecting means for performing a state transition in response to the movement of the optical disk. And a judging means for judging an abnormal operation of the above.

Further, the disk drive of the present invention is provided with means for monitoring the elapsed time when the switch and the sensor are turned on or off, and the process of turning on and off.

[0012]

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

FIG. 1 is a diagram showing a configuration of a disk reproducing apparatus to which the present invention is applied. The loading motor 8 rotates the roller 9 in the direction of the arrow d, and the disc 3 moves into the reproducing apparatus 1, that is, is loaded by friction with the roller 9. The guide pins 10 to 16 guide the disk 3 moved by the rotation of the roller 9 to the reproduction position. For example, the guide pin 10 rotates about a shaft 10a. An arc indicated by a dotted line indicates a case where a part of the disk 3 is inserted into the reproducing apparatus 1 from the disk insertion slot (not shown) in the direction of arrow e, and the guide pins 10 and 11 are pushed open. . Sensor 4, switch section 5
Reference numeral 7 denotes a detecting means for detecting the position of the moving disk 3. The microcomputer 2 controls the operation of the playback device 1 comprehensively.

FIG. 2 is a timing chart showing a process when the state of each of the switches 5 to 7 and the sensor 4 is normally changed during disc loading. Time a,
“b” and “c” are time limits until each switch section makes a transition, and a predetermined time is set in advance.

As shown in FIG. 1, when the disk 3 is inserted in the direction of arrow e, the guide pin 10 rotates in the direction of arrow f, whereby the shaft 18 moves in the direction of arrow g, and The state of No. 5 transits to ON. When the switch section 5 is turned on, the loading motor 8 rotates the roller 9 and the disk 3 is drawn into the reproducing apparatus 1. Thereafter, the switch unit 6 is turned on, and subsequently, the sensor unit 4 is turned on.

When the guide pin 16 is moved in the direction of arrow h along the guide groove 17 by the loaded disc 3, the switch section 7 is turned on in conjunction with the movement. After the switch section 7 is turned on, the disc insertion operation is completed.

FIG. 3 is a timing chart showing a process when the state transitions of the switches 5 to 7 and the sensor 4 are abnormal during disc loading. As an example, a case where the sensor unit 4 makes a transition before the switch unit 6 makes a transition to ON is shown.

Next, a description will be given of a method for judging an operation abnormality at the time of loading a disc by the disc reproducing apparatus of the present invention.

FIG. 4 shows that the microcomputer monitors the switch units 5 to 7 and the sensor unit 4 which transition during disk loading.
9 is a flowchart illustrating a method for determining an operation abnormality.
As shown in the flowchart of FIG. 4, the microcomputer unit 2 shown in FIG. 1 drives the loading motor unit 8 in the disk insertion direction after the switch unit 5 is turned on when the disk is inserted, and moves the roller unit 9 in the direction of arrow d. (S1,
S2). Next, the microcomputer unit 2 starts measuring an elapsed time until the switch unit 6 is turned on (S3).

The microcomputer unit 2 monitors the transition states other than the switch unit 6 together with the measurement of the elapsed time (S4, S4).
5). The microcomputer unit 2 includes a switch unit 6 as shown in FIG.
If the status changes to other than (the sensor unit 4 is ON in the same figure), it is determined that the operation is abnormal, and the process proceeds to the process of ejecting the disk (S7). That is, the microcomputer unit 2 drives the loading motor unit 8 in the disc ejection direction to rotate the roller unit 9 in a direction opposite to the arrow d. Microcomputer part 2
Monitors the elapsed time when there is no transition other than the switch unit 6 and no transition of the switch unit 6 (S6). If the elapsed time exceeds the time limit a shown in FIG. 2, it is determined that the operation is abnormal, and the process proceeds to the process of ejecting the disc (S
7).

Conventionally, since the above-mentioned detecting means is not provided, the loading motor 8 is continuously driven in the insertion direction. In the present embodiment, the loading motor unit 8 is driven in a direction in which the disc is ejected, that is, in a direction opposite to the insertion direction.

The microcomputer unit 2 determines that the switch unit 6 is normal when the switch unit 6 is turned on within the time limit a shown in FIG. The measurement of the elapsed time until 4 turns on is started (S8).

The microcomputer unit 2 monitors the transition state other than the sensor unit 4 together with the measurement of the elapsed time (S9, S1).
0). The microcomputer unit 2 determines that the operation is abnormal when the elapsed time until the sensor unit 4 is turned on or the sensor unit 4 is turned on exceeds the time limit b shown in FIG. 2 (S1).
1), the process proceeds to the process of ejecting the disc (S12).

The microcomputer unit 2 determines that the sensor unit 4 is normal when the sensor unit 4 is turned on within the time limit b in FIG. The measurement of the elapsed time until 7 turns on is started (S13).

The microcomputer unit 2 monitors the transition state other than the switch unit 7 together with the measurement of the elapsed time (S14, S1).
5). The microcomputer unit 2 has a transition other than the switch unit 7 or
If the elapsed time until the switch unit 7 is turned on exceeds the time limit c in FIG. 2, it is determined that there is an abnormality (S16), and the process shifts to a process of ejecting the disk (S17).

When the switch unit 7 has turned on within the time limit c in FIG. 2 and there has been no transition other than the switch unit 7, the microcomputer unit 2 determines that the operation is normal and stops the loading motor 8 ( S18). Upon completion of this process, the insertion operation is completed.

As described above, according to the present embodiment, the means for setting and monitoring the time limit in the transition process of each switch unit and the sensor unit, the switch unit and the sensor unit to which the next transition takes place in the above transition process Means for monitoring a transition state other than the above, and detecting an abnormal insertion operation. When an abnormal insertion operation is detected, the loading motor unit 8 is inverted so that an excessive load is not applied in the same direction. I will not let you.

[0028]

As described above, according to the present invention, when a disk is pulled in, an abnormal operation due to a deformed disk or the like is detected by using a switch unit and a sensor, thereby preventing damage to the disk and failure of the apparatus. It is possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a disk drive having a slot-loading type mechanical housing.

FIG. 2 is a timing chart showing a process in which each switch unit and a sensor unit are turned on when a disc insertion operation is normally performed.

FIG. 3 is a timing chart showing a transition process of each switch unit and a sensor when a disc insertion operation is abnormal.

FIG. 4 is a flowchart showing a unit for detecting an abnormal disk insertion operation of a deformed disk or the like.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Playback apparatus, 2 ... Microcomputer (microcomputer), 3 ... Disk, 4 ... Sensor, 5-7 ... Switch part, 8 ... Loading motor, 9 ... Roller, 10-16
…guide pin.

Claims (8)

[Claims] 1. A slot loading type disk device for pulling an optical disk inserted into a disk insertion slot to a reproduction position in the device, comprising: a disk loading unit for moving the optical disk into the device; and a disk loading unit. A plurality of position detecting means for detecting a position of the optical disk moving in the apparatus; and an operation abnormality at the time of disk loading based on a state transition process of the plurality of position detecting means for performing a state transition corresponding to the movement of the optical disk. A discriminating means for judging the condition. 2. The method according to claim 1, wherein the determining means measures a time period from when one of the detecting means makes a state transition while the optical disc is moving to when a detecting means to which the next state transition is to be made makes a state transition. 2. The disk device according to claim 1, wherein when the measured time exceeds a predetermined time limit, the operation is determined to be abnormal. 3. The apparatus according to claim 1, wherein the determination unit determines that the operation is abnormal if the order in which the plurality of detection units perform state transition does not follow a predetermined order while the optical disk is moving. The disk device as described above. 4. The disk device according to claim 1, further comprising a unit that ejects the optical disk when the operation is determined to be abnormal by the determination unit. 5. A method for judging an operation abnormality at the time of disc loading in a slot loading type disc apparatus for pulling an optical disc inserted into a disc insertion slot to a reproduction position in the apparatus, wherein the optical disc is moved into the apparatus. Causing the optical disc to move in the apparatus, detecting the position of the optical disc by a plurality of position detecting means, and performing a state transition corresponding to the movement of the optical disc based on a state transition process of the plurality of position detecting means. Determining an operation abnormality during disk loading. 6. A step of measuring the time from when one of the detecting means makes a state transition while the optical disk is moving to when a detecting means to which the next state transition is scheduled makes a state transition. 6. The method according to claim 5, further comprising the step of determining the occurrence of the operation abnormality when the measurement time exceeds a predetermined time limit. 7. The method according to claim 1, wherein the step of determining includes the step of determining the occurrence of the operation abnormality when the order in which the plurality of detection means changes state during the movement of the optical disk does not follow a predetermined order. The method according to claim 5, wherein the operation abnormality is determined. 8. The operation abnormality judging device according to claim 5, further comprising a step of ejecting said optical disk when said operation abnormality is judged in said judging step. Method.