JPH03292669A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To swiftly change a disk over to the next disk by reproducing a disk in the next selected disk arranging part when the present selected disk arranging part has no disk. CONSTITUTION:The device is provided with a disk detecting means 3b (B) for detecting the presence of disks in the disk arranging parts of a disk arrang ing member 2. Then, a disk arranging member driving means (D) is controlled by a control means (C) in order to assign the next disk arranging part 3 in preset selective order to a reproducing position 29 at the time of detecting no disk in the present disk arranging part assigned to the reproducing position 29 in accordance with the selective order. By this method, the changeover to a disk in a disk arranging part set in selective order for following selection is swiftly performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a compact disc player, etc., which arranges a plurality of discs on a rotatable disc arrangement member, indexes these discs to predetermined playback positions, and plays them sequentially. The present invention relates to a disc playback device.

[Conventional technology]

In a conventional disc playback device such as a compact disc player, as shown in FIGS. 8 and 9, a plurality of discs 31 as recording media are placed on a disc-shaped tray 3.
A so-called rotary type disc changer is arranged on a disc arranging part 33 formed in a disc arrangement part 2, and rotates the above-mentioned tray 32 in, for example, a certain direction to index and reproduce the disc arranging part 33, that is, the disc 31, at a predetermined playback position. Some have a mechanism. In the above disc playback device, the disc 31 placed in the disc placement part 33 of the tray 32 is moved between a magnetic disc holder 35 provided at the tip of the fixed arm 34 and a turn of the disc drive means 36. maintained by table 37;
It is held and rotated by a spin motor 38. The information recorded on the disc 31 is detected by the optical pickup 39, and thereby reproduced.

In such a disc playback device, the tray 32 rotates in a fixed direction and the discs 31 are played back in the order in which they are arranged, or the user controls a microcomputer (hereinafter referred to as a microcomputer, not shown) in the disc playback device. According to the program input to the disk 3
1 is selectively played back. At this time, as shown in FIG. 10, first, the disk 31 placed in the disk placement section 33 at the playback position is played back (S31), and when the playback of this disk 31 is completed, the disk 31 is 532), and then the next selected disc placement section 3 in the tray 32
Rotate the tray 32 so that 3 comes to the playback position (S3
3) Next, the disc 31 is played back (334).
. After that, when the playback of disk 31 is completed, disk 3
The reproducing operation of step 1 is stopped (535), the tray 32 is rotated (336), and the above operations are repeated in the same manner.

Further, as described above, when the discs 31 are being played back in a predetermined order, the next disc placement section 33
If there is no disk 31, the disk drive means 36
Once the disc 31 operates according to the playback operation procedure, when the output signal from the optical pickup 39 indicates that there is no disc 31 in the disc placement section 33, the tray 32 is driven and the tray 32 is moved to the next disk placement section 33. The disc 31 is now played back.

[Problem to be solved by the invention]

However, in the conventional configuration described above, it takes a long time from when the microcomputer outputs a reproduction operation command until it is determined that there is no disk 31 in the disk placement section 33. For this reason, for example, when editing music information on a disk by recording it on a magnetic tape, if there is no disk 31 in the predetermined disk placement section 33, the songs recorded on the magnetic tape will be different from each other. A large silent section occurs between the two, making it impossible to perform good editing.

In addition, when a plurality of discs 31 are being played back continuously, if there is no disc 31 in a certain disc placement section 33, it will take a long time to start playing the next disc 31, and the disc 31 will not be used. There are problems such as causing discomfort and harm to people.

Therefore, the present invention quickly detects the presence or absence of a disk 31 in the disk placement section 33, and when a plurality of disks 31 are played back continuously, after the playback of a certain disk 31 is completed, the next disk 31 The object of the present invention is to provide a disc playback device that does not require a long time until the start of playback.

[Means to solve the problem]

In order to solve the above-mentioned problems, the disc playback device of the present invention has a plurality of rotatably provided disc placement sections, and discs serving as recording media are individually arranged in these disc placement sections. A disc mounting member, a disc mounting member driving means for rotating the disc mounting member, and a disc mounting member for detecting when each disc mounting portion of the disc mounting member reaches a playback position for playing a disc. disc placement member driving means based on the output of the disk placement portion detection means so that the disk placement portion is indexed to the playback position according to the set selection order of the disk placement portions; In a disc playback device equipped with a control means for controlling the operation of the disc, the following measures are taken.

That is, as shown in FIG. 1, a disk detecting means is provided for detecting the presence or absence of a disk in the disk arranging portion of the disk arranging member. The output of the disc placement portion detection means is configured such that when it is detected that there is no disc in the disk placement portion indexed to the playback position, the next disk placement portion in the selection order is assigned to the playback position. The disc mounting member driving means is controlled based on the disc arrangement member driving means.

[For production]

According to the above configuration, the disk arranging member is driven by the disk arranging member driving means to rotate.

At this time, the operation of the disk placement member driving means is controlled by the control means based on the output of the disk placement portion detection means, and each disk placement portion of the disk placement member is moved to the playback position according to the set selection order. will be allocated to.

Here, when the disc detecting means detects that there is no disc in the disc placement section indexed to the playback position, the control means causes the next disc placement section in the selection order to be indexed to the playback position. Next, the disk mounting member driving means is controlled based on the output of the disk mounting portion detection means.

As a result, when the playback of the disc placed in a certain disc placement part of the disc placement member is completed and the next selected disc placement part is to be played, the disc placement part is If there is no disc, the disc in the next selected disc placement section will be played, so that switching from one disc to the next can be quickly performed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 to 7.

As shown in FIG. 2, the disc playback device according to the present invention has a disc-shaped tray 2 serving as a disc placement member. It is designed to rotate. In the tray 2, a plurality of recessed disk placement portions 3, in which the disks 1 are placed, are formed at equal intervals. As shown in FIG. 3, each disc mounting portion 3 is formed with a long hole 3a for passing a turntable 7 (described later) and for securing an optical path between the optical pickup 9 and the disc 1. . A sensor detection hole 3b is formed in a portion closer to the center of the tray 2 than the elongated hole 3a.

As shown in FIG. 4, an arm 4 extending from the device housing 10 in the direction of the center of the tray 2 is provided above the tray 2 at the playback position 29 for playing back the disk 1. A magnetic disk retainer 5 is provided at a portion of the arrangement portion 3 that corresponds to the circular center portion.

A disk drive mechanism section 6 is disposed below the tray 2 at a portion facing the arm 4 mentioned above with the tray 2 interposed therebetween. This disk drive mechanism section 6 has a spin motor 8 for rotating the disk 1, and at the upper end of the rotating shaft of this spin motor 8, there is a turn that clamps and rotates the disk 1 together with the disk holder 5. A table 7 is attached. The spin motor 8 described above is attached to a drive mechanism chassis 11. This drive mechanism chassis 11 has a vibration isolating rubber 1 at the outer peripheral end of the tray 2.
It is rotatably attached to the support member 13 via 2. A chassis drive lever 14 for driving the drive mechanism chassis 11 up and down is provided on the other end side of the drive mechanism chassis 11. By pushing up the drive mechanism chassis 11 via the rubber 15 or canceling its operation, the turntable 7 moves to the disk 1.
It is designed to move to an upper position and a lower retracted position to hold it. That is, when the turntable 7 moves to the upper position, the disc 1 is lifted by the turntable 7 above the disc placement part 3,
While being held between the turntable 7 and the disc holder 5, when the turntable 7 moves to the retracted position, the turntable 7 separates from the disc holder 5.
A disk 1 is placed on a disk placement section 3.

An optical pickup 9 for detecting signals recorded on the disk 1 is provided between the spin motor 8 and the anti-vibration rubber 12 in the drive mechanism chassis 11. This optical pickup 9 is adapted to move in the radial direction of the disk 1 along a guide shaft 16. Further, below the sensor detection hole 3b of the tray 2, an optical disk sensor 17 is arranged to detect the presence or absence of the disk 1 in the disk placement section 3. The disk sensor 17 projects, for example, infrared rays upward through the sensor detection hole 3b, and detects the presence or absence of the disk 1 based on the presence or absence of reflected light from the disk 1.

The disk sensor 17 and the sensor detection hole 3b constitute disk detection means.

Further, near the outer circumferential portion of the tray 2, as shown in FIG. 5, a disk placement portion detection mechanism 18 is provided as a disk placement portion detection means for detecting the rotational position of the tray 2. This disk placement part detection mechanism 18 is located in the device housing part 1.
0, and a roller 2 provided at the end of the rotating bar 19 on the tray 2 side.
0, a spring 21 provided on the opposite side of the rotation bar 19 from the roller 20 side and urging the roller 20 to rotate in the direction of the tray 2; 20 shapes, and each disk placement portion 3
a plurality of position detection recesses 2a formed in each position, and a switch 22 that is turned on by the rotation bar 19 when the roller 20 is fitted into the position detection recess 2a of the tray 2.
It is composed of.

The disc playback apparatus also includes a microcomputer (hereinafter referred to as microcomputer) 25 as a control means shown in FIG. This microcomputer 25 operates based on inputs from an input key 28, a disk sensor 17, and a switch 22 provided in the device housing 10, to operate a disk playback means 26 and a tray drive means 27 as a disk arrangement member drive means. The rotating operation of the tray 2 and the reproducing operation of the disk 1, that is, the control operations shown in FIG. 7 are performed by controlling the operation of the controller. The disk reproducing means 26 includes the spin motor 8, the optical pickup 9, a lever driving means (not shown) for driving the chassis driving lever 14, etc., and is configured to perform the reproducing operation of the disk 1. , the tray 2 is rotated.

In the above configuration, when the input key 28 is operated, the control operation by the microcomputer 25 is performed when, for example, the operation of sequentially playing back the disks 1 placed in each disk placement section 3 of the tray 2 is selected. This will be explained using the flowchart shown in FIG.

The microcomputer 25 first places the disc 1 in the disc placement section 3 at the current playback position based on the output of the disc sensor 17.
SL), and determine whether or not there is a
If the disc 1 is not present in the disc placement section 3, the process moves to S5, and if the disc 1 is present in the disc placement section 3, the disc reproducing means 26 is caused to reproduce the disc 1 (32).

Next, when the reproduction of the disc 1 is completed, the reproduction operation by the disc reproduction means 26 is stopped (S3), and if the reproduction operation is to be continued (S4), the process moves to S5.
The tray 2 is rotated by the tray drive means 27. Next, when it is detected by the switch 22 that the next disc placement section 3 has reached the playback position (S6), the rotation of the tray 2 is stopped (S7), and the process moves to Sl, and the same control is performed thereafter. .

In this embodiment, the disc sensor 17 is disposed at the playback position 29, but if the rotation direction of the tray 20 is limited to one direction, the disc sensor 17
However, with respect to the playback position 29, the disk placement section 3 located on the side opposite to the rotation direction of the tray 2, for example, the disk placement section 3 located at the playback position 29, is adjacent to the disk placement section in the direction opposite to the tray rotation direction. It may be provided in position 3. That is, since the disc placement section 3 moving to the playback position 29 always passes through the above position, it is possible to detect the presence or absence of the disc I.

〔Effect of the invention〕

As described above, the disc playback device of the present invention includes a disc detection means for detecting the presence or absence of a disc in the disc placement part of the disc arrangement member, and the control means causes the disc detection means to detect the presence or absence of a disc in the disc placement part of the disc arrangement member, and the control means controls the disc playback device according to the set selection order by the disc detection means. The output of the disc placement part detection means is configured such that when it is detected that there is no disc in the disc placement part that has been indexed to the playback position, the next disc placement part in the selection order is indexed to the playback position. Based on this, the disc arrangement member driving means is controlled.

As a result, when multiple discs are being played back in a predetermined order and there are no discs in the disc placement area for which the selection order has been set, the selection order will be set as the one to be selected after that. The set disk placement section can be quickly switched to the disk. Therefore, for example, when editing music information on a disc by recording it on magnetic tape, it is possible to avoid a situation where large silent parts occur between songs, and when the next disc is played back. This has the advantage of being able to avoid a situation where a long waiting time is required until the process is completed.

[Brief explanation of drawings]

FIG. 1 is a block diagram corresponding to the configuration shown in the claims. 2 to 7 show an embodiment of the present invention. FIG. 2 is a schematic plan view of the disc playback device. FIG. 3 is an enlarged view of the main part of the playback position shown in FIG. 2 with the arm removed. FIG. 4 is a schematic longitudinal sectional view showing the structure of the reproduction position. FIG. 5 is an enlarged view of the disk placement portion detection mechanism shown in FIG. 2. FIG. 6 is a block diagram showing the configuration of the main parts of the disc playback device. FIG. 7 is a flowchart showing the control operation by the microcomputer shown in FIG. 8 to 10 show conventional examples. FIG. 8 is a schematic plan view of the disc playback device. FIG. 9 is a schematic vertical sectional view showing the structure of the reproduction position. FIG. 10 is a flowchart showing the control operation by the microcomputer. 1 is a disk, 2 is a tray (disk placement member), 3 is a disk placement section, 3b is a sensor detection hole (disc detection means), 9 is an optical pickup, 17 is a disk sensor (disk detection means), 18 is a disk 22 is a switch, 25 is a microcomputer (control means), 26 is a disc playback means, 27 is a tray drive means (disc placement member drive means), 29 is a playback device. It's the location.

Claims (1)

[Claims] 1. A disk arranging member that is rotatably provided and has a plurality of disk arranging portions, in which disks serving as recording media are individually arranged, and a disk that rotates this disk arranging member. an arrangement member driving means, a disc arrangement part detection means for detecting when each disc arrangement part of the disc arrangement member reaches a playback position for playing a disc, and a disc arrangement part detection means for detecting when each disc arrangement part of the disc arrangement member reaches a playback position for playing a disc; A disc playback device comprising: control means for controlling the operation of a disc mounting member driving means based on the output of the disc mounting portion detection means so that the disc mounting portion is indexed to a playback position according to the selection order. , comprising a disc detecting means for detecting the presence or absence of a disc in the disc arranging portion of the disc arranging member; Based on the output of the disk placement section detecting means, the disk placement member is selected so that when it is detected that there is no disk in the placement section, the next disk placement section in the selection order is indexed to the playback position. A disc playback device, characterized in that it is configured to control a drive means.