JPS61107567A - Multi disk automatic reproducing apparatus - Google Patents

Abstract

PURPOSE:To make disk replacement easy by adopting an optical reading system for a disk selection device. CONSTITUTION:Control circuit 44 includes not only the first recognition section 22 to recognize key input, but the second recognition section 48 to recognize data input from an optical reader 46. The control circuit also includes a comparator 50 to compare these two data items and a judgement and instruction section 52 to judge the result of the comparison and output an appropriate instruction. Moreover, a disk selecting section 54 is provided with the optical reader 46 as a means of selecting a disk, whereby this read data is inputted in the control circuit 44, and this selecting section 54 also contains a disk selecting mechanism section 28 that is operated by the instruction from the control circuit 44. With this optical reader, the information that acts as the information source peculiar to disk to be able to optically read data instantaneously is read and this read data is compared with data obtained by the disk selecting instruction to select a disk.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a multi-disc automatic playback device, and particularly to improvements in its disc selection means.

[Technical Background of the Invention] As shown in FIG. 4, a conventional multi-disc automatic playback device, such as a jukebox, includes an input circuit 10 for selecting music, and recognizes and judges an input signal to select a disc 12 and select music. a control circuit 14 that generates commands to perform the above operations, a disk selection unit 16 that incorporates the disk 12 and performs disk selection operations, and a pickup 18 that reproduces the recording signal of the selected disk 12 and converts it into an electrical signal. , and a playback section 20 that amplifies and outputs sound.

The input circuit 10 is usually a key switch matrix circuit or a similar switch circuit.

Control 1 circuit 14 is the key to human power! ! ! ! It consists of an identification section 22, a judgment section 24, and an instruction section 26, which is usually constructed from an integrated circuit such as a microprocessor. The disk selection section 16 includes a mechanism section 28 for selecting the disk 12 according to a command from the control circuit 14;
It is composed of a disk selection arm 30, a structure 32 indicating the position of the disk, and its sensor 34. The reproducing unit 20 includes a disc drive unit 36, the pickup 18, a head amplifier 38, a control and power amplifier 40, and a speaker 42, and the disc 12 is reproduced here.

In a multi-disc automatic playback device configured as described above, the operator selects a desired song from a list of "song titles" and "titles" (hereinafter simply referred to as "song titles" for simplicity), which are not shown. Paired with the "song title" provided in the table above.
An input code corresponding to is first input to the input circuit 10. In other words, the operator [reads the data visually]
This will be determined and manually input into the input circuit 10. This input signal is transmitted to the control circuit 14, which makes a decision and outputs a control signal for operating the disk selection section 16.

Then, depending on whether an input request is made or whether the entire disk 12 is moved by this control signal, the disk 12 is selected. At this time, a sensor 34 for detecting the positional relationship between the mechanism section 28 and the disk 12 is essential, and in the past, this sensor 34 was often built in between the disk storage section and the disk selection section. In the example in this diagram,
It is comprised of a structure 32 on the disk storage side that indicates each position for one disk, and a sensor 34 that detects the ribs of the structure 32. In this way, the mutual positional relationship is detected while moving, and after moving to the desired position, one disc is selected.

The disk 12 selected in this way is moved to the disk rotation drive unit 36, and the signal pressed on the disk 12 is converted into an electric signal by the pickup 18, and amplified by the head amplifier 38, control and power amplifier 40. Then, the sound is output from the speaker 42.

[Problems with the background art] Such a multi-disc automatic playback device requires precision in many parts, especially in the operation when selecting the disc 12. For example, in the above example, the structure 32 that indicates the position
Therefore, the sensor 34 is required to have high positional accuracy, and therefore becomes expensive.

Further, if position detection becomes impossible due to damage or the like, the entire structure 32 must be replaced, resulting in a large-scale repair.

On the other hand, the storage position of the disk 12 is fixed by a method such as being encoded with certain data, and once the disk 12 is
2, the input method for disc selection corresponds to one disc 12 on a one-to-one basis. Therefore, when changing the storage location of the disk 12, it is also necessary to change the input data (for example, the disk storage number), which is a tedious task for jukeboxes that frequently change the disk 12. Met.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and an object thereof is to provide an inexpensive multi-disc automatic playback device that allows easy work when replacing discs.

[Summary of the Invention] That is, the multi-disc automatic playback device according to the present invention includes an optical reading device in the disc selection device, and uses the reading device to instantly read information optically as a disc-specific information source. The disc is selected by reading the data (for example, a bar code, table of contents data of a compact disc) and comparing the read data with data according to a disc selection command.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The first factor indicates the configuration of the input circuit 10.
The reproduction section 20 is the same as the conventional one.

The control circuit 44 includes a first recognition unit 2 for recognizing key human power.
2, but also includes a second recognition section 48 that inputs data from an optical reading device 46, which will be described later.

In addition, a comparison unit 50 that compares these two data and a judgment/command unit 5 that judges the comparison result and outputs a command.
Including 2.

Further, the disc selection section 54 includes an optical reading device 46 as means for disc selection, and the read data is input to the control circuit 44 . In addition, the selection section 54 also includes a disk selection mechanism section 28 that operates according to commands from the control circuit 44.

The operation of this multi-disc automatic playback apparatus will be described below, with particular emphasis on the disc selection operation, using the flowchart shown in FIG. First, in step a, key human power is received. The input to the first Wg intelligence unit 22 is the same as in the past. At this time, in step b, the data is stored in the input register, and thereafter this data is used for comparison with the data read from the disk. Once the input data is entered,
Information section 5 attached to the disk 12 from the judgment/instruction section 52
A command is output to read information from 6. The information in this case refers to data specific to the disc, such as a bar code printed on a label on the disc surface, a table of contents data pressed on a compact disc, and the like. Various methods can be considered to read this data, such as a method in which the reading device 4G itself moves, a method in which the disc selection arm 30 selects and reads the discs 12 one by one, or a method as shown in FIG. One example is a method in which the disk storage tray 58 is configured so that the disks 12 are arranged on the same circle, and the tray 58 is rotated to move the disks 12 to the reading device 46.

Then, the disc 12 read by the reading device 46
The unique data of the second Wg control section 48 in the control circuit 44
input. Step C of the flowchart corresponds to this, and the first r! Similarly to the identification section 22, it is written to an internal register. The comparator 50 compares the above two data, that is, the data from the input circuit 10 and the data from the disk data reading device 46 (step d). The judgment/instruction unit 52 judges whether the comparison results match (step e). If the two data do not match, the judgment/instruction unit 52 issues an instruction to read information on the next disk. The data is output (step f), and this operation is repeated until the matching data is read. If the results of the above comparison match, the process moves to step Q. The fact that they match means that the disc 12 is exactly the disc 12 that should be played, so the command to play this disc 12 is sent to the disc selection mechanism section 2 again.
Output to 8. This completes the disc selection work, and the disc playback operation then begins.

Since the operation of the playback section 20 is the same as the conventional technology,
It is omitted here.

In other words, by using a multi-disc automatic playback device with such a configuration, the input information for disc selection becomes constant (can be fixed), which eliminates the hassle of replacing input data every time a disc is replaced. This also reduces the possibility of input errors.

Further, since mechanical precision is not required so much, it can be made inexpensive.

Furthermore, by adding an optical reader to the input device, the method of disc selection can be made more general.
Everything from input to disk selection can be performed reliably without errors.

Note that by using an optical reading device also in the input circuit, the data comparison method becomes easy and a simple device can be realized as a system.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an inexpensive disc selection type playback device that allows easy work when replacing discs.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a multi-disc automatic playback device according to an embodiment of the present invention, FIG. 2 is a flowchart explaining the operation of the multi-disc automatic playback device of FIG. 1, and FIG. 3 is a diagram similar to the one shown in FIG. FIG. 4 is a diagram showing the configuration of a conventional multi-disc automatic playback device. DESCRIPTION OF SYMBOLS 12... Disc, 20... Playback part, 22... First recognition part, 44... Control circuit, 46... Optical reader, 48... Second recognition Department, 50...
Comparison section, 52... Judgment/instruction section, 54... Disc selection section, 56... Information section, 58... Disk storage tray. Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] A multi-disc automatic playback device that can automatically play a desired disc from among a large number of discs includes an input means for inputting identification data of the desired disc, and an optical an optical reading means for reading identification data readable by the input means, and comparing the identification data input from the input means with the identification data read by the reading means to select a desired disc from the large number of discs. 1. A multi-disc automatic playback device comprising: control means for generating a control command signal for a multi-disc automatic playback device.