JPH0316151Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a music selection device for an optical disc player.

BACKGROUND ART AND THEIR PROBLEMS In optical disc players such as compact disc players, signals are recorded on the optical disc at high density, so a large number of songs can be recorded.

Therefore, conventionally, for example, in an optical disk player that does not have 10 keys, when selecting a song, the next key is used to select the next song number each time the button is pressed, and the previous key is selected each time the button is pressed. I was trying to access the track number corresponding to the number of times the previous key was pressed, so for example, if you wanted to select the 10th song while playing the 1st song, you would have to press the next key 9 times. However, the song selection operation was troublesome. Furthermore, for example, a compact disc can hold up to 99 songs, so you can select, for example, the first few dozen songs from an optical disc that has many songs, or select the next song from the current song number or the previous song one by one. When selecting music, the music selection operation is extremely difficult, and conventional music selection functions have been insufficient.

Purpose of the Invention In view of the above-mentioned conventional problems, it is an object of the present invention to provide a music selection device for an optical disc player that greatly facilitates music selection operations.

Summary of the invention The music selection device for an optical disc player according to the invention consists of a music selection button that sequentially switches and specifies the song number to be played by pressing the music selection button, and a pulse that sequentially outputs pulses according to the pressing operation time of the music selection button. The above-mentioned apparatus comprises a generating means, a setting means for sequentially switching the performance song number by adding or subtracting the pulses output by the pulse generation means, and a display means for displaying the performance song number switched by the setting means. By providing a delay timer circuit in the pulse generating means, when the music selection button is pressed, the first pulse is output first, and when the pressing operation continues for a predetermined time or more, the first pulse is output according to this duration. 2
The configuration is such that subsequent pulses are output at intervals shorter than the predetermined time. With this configuration, when selecting the next or previous performance song number, it is only necessary to press the selection button within the predetermined time as in the case of the conventional next key or previa key, and By continuing to press the song selection button without having to press the song selection button many times,
Since the song number is displayed as it changes sequentially, if the song selection button is released when the desired song number is displayed, the desired song number has been set. In this way, the music selection operation can be made extremely easy.

Embodiment An embodiment of the music selection device for an optical disc player according to the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows an embodiment of a music selection device for an optical disc player according to the present invention, in which one end of a music selection key 1 for sequentially selecting and specifying performance music numbers by pressing is grounded, and the other end is grounded. It is connected to the positive power supply +B via the resistor 2. Now, the case where music selection key 1 is applied to the next key will be described below.

When the music selection key 1 is pressed, the input of the one-shot multivibrator 3 becomes "L" level,
Immediately, a pulse _P1 shown in FIG. 2 is sent out from the one-shot multivibrator 3 via the one-shot OR circuit 4, and is supplied to a system control circuit such as a microcomputer. Then, the performance song number is incremented by "1". Therefore, the performance is 1
If it is from the first track, it means that the second song has been selected, and if the 10th song is being played, it means that the 11th song has been selected.

If the music selection key 1 is not pressed for a long time, the next music number will be selected as described above.

However, if the music selection key 1 is kept pressed, the delay timer circuit 5 supplies an output (“H” level) to one input terminal of the AND circuit 6 after a predetermined time T ₁ (for example, 1 sec), and the output of the AND circuit 6 becomes “H” level. The clock oscillator 7 is driven by the output "H" of the AND circuit 6, and the clock pulses of the clock oscillator 7 are supplied to the counter 8 and counted. On the other hand, a setting value output corresponding to the setting time T ₂ (for example, 0.3 seconds) is supplied from the setting circuit 9 to the comparison circuit 10 . The comparator circuit 10 supplies an output pulse P2 shown in FIG. ₂ to the system control circuit via the OR circuit 4 when the output of the counter 8 matches the set value of the setting circuit 9. Note that the output pulse _P2 of the comparison circuit 10 is supplied to the counter 8 via the OR circuit 11, and the contents of the counter ₈ are reset at the fall of the pulse P2. Similarly, a timer 12 consisting of a counter 8, a setting circuit ₉ , and a comparison circuit 10 sequentially sends pulses P ₃ , P _{4 ,} . supply to In the setting section for setting the number of music to be played, based on the pulses P ₁ , P _{2 ,} . Then, the performance song numbers to be changed sequentially are displayed on the display section via the system control section. Therefore, to set the song number to be played, press song selection key 1.
The person who is pressing the music selection key 1 releases the music selection key 1 when he or she watches the display and the music number to be played on the display reaches the desired set music number. When the music selection key 1 is released, the delay timer circuit 5 is reset, the output of the NAND circuit 6 is inverted and becomes the "L" level, and the clock oscillator 7 becomes inoperable and stops oscillating. On the other hand, the counter 8 is reset via the OR circuit 11 when the output of the AND circuit 6 falls from the "H" level to the "L" level.
Thereafter, the timer 12 does not send out any pulses, and the performance song number setting operation, that is, the song selection operation is completed.

Here, the one shot multivibrator 3, the OR circuits 4 and 11, the delay timer circuit 5, the NAND circuit 6, the clock oscillator 7, and the timer 12 constitute a pulse generating circuit 13. Therefore, as shown in FIG. 2, this pulse generating circuit 13 sends out a pulse P ₁ at the moment when the music selection key 1 is pressed, and if the music selection key 1 is kept being pressed, after a predetermined time (T ₁ + T ₂ ). Further pulses (next control signals) P ₂ , P ₃ , . . . P _o are sent out at constant time intervals T ₂ .

The delay timer circuit 5 delays the time T ₁ to lengthen the time interval T between the second pulse P ₂ and the first pulse P ₁ because of the OR circuit 4 for setting the performance song number. One output pulse is enough, but
Since the pressing operation time of the music selection key 1 varies depending on the person, this is to prevent a second hit from occurring and an error in setting the performance music number.

From the above, instead of pressing a music selection key such as the next key or the previa key many times as in the past, by continuing to press the music selection key 1, the time will change according to the pressing operation time of the music selection key 1. The pulse generation circuit 13 generates a number of music selection pulses corresponding to
The number of music pieces to be played is automatically added and switched in sequence in the setting section by the number of pulses. This sequentially changing performance song number is displayed on the display, so if you release the song selection key 1 when the desired performance song number is reached, the desired performance song number will be set in the setting section, and this set The optical disc can be played back depending on the performance song number.

In short, even when selecting music numbers to be performed one by one, it becomes extremely easy to perform the music selection operation to bring the music to the desired set music number.

Further, the pulse generating circuit 13 may be modified in various ways without departing from the gist of the present invention. For example, the one-shot multivibrator 3 may be replaced by a flip-flop.

Further, in this embodiment, although the case where the music selection key 1 is applied as the next key has been described, the case where it is applied as the previa key is also explained in the same way.

Effects of the invention If the present invention is used, as described above, without having to press the song selection button such as the next key or the previa key many times, the song selection button can be pressed until the song number displayed on the display means reaches the desired performance song number. By continuing to press the button, the number of pieces to be played is automatically sequentially switched according to the duration of the pressing operation, making it possible to set the desired number of pieces to be played very easily. Therefore, if you use a song selection button that has a song selection function based on the pressing operation time, it is possible to keep the desired song number, for example, even when selecting a song number that is far away, or a song number that is in front of you in the middle of a performance. This has great practical effects, such as making music selection operations extremely easy.

In addition, by providing a delay timer circuit in the pulse generating means, when the music selection button is pressed, the first pulse is output first, and when the pressing operation continues for a predetermined time or more, the pulse is output according to this duration. The configuration is such that the second and subsequent pulses are output at intervals shorter than the predetermined time. Therefore, even if the time required for pressing the song selection button varies depending on the person, when selecting the next or previous song number, the button must be pressed above the button as in the case of the conventional next key or previa key. By pressing the button only within a predetermined time, you can reliably select the desired performance number, and even when selecting the next or previous performance number, you can select it relatively quickly. .

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of a music selection device for an optical disc player according to the present invention, and FIG. 2 is a diagram showing an output signal of the OR circuit 4 of FIG. 1. In addition, in the symbols used in the drawings, 1...
. . . music selection key, 5 . . . delay timer circuit, 13 . . . pulse generation circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A music selection button that sequentially switches and specifies performance song numbers by pressing the button, a pulse generating means that sequentially outputs pulses according to the pressing operation time of the music selection button, and the pulse generating means a setting means for sequentially switching the performance song number by adding or subtracting pulses output from the pulse generation means; and a display means for displaying the performance song number to be changed by the setting means, and a delay timer circuit is provided in the pulse generation means. By providing this, when the music selection button is pressed,
An optical disk player configured such that, when a first pulse is first output and the pressing operation continues for a predetermined time or more, second and subsequent pulses are output at intervals shorter than the predetermined time according to this duration. music selection device.