JPS6053394B2 - Magnetic tape automatic performance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic magnetic tape performance device.

Generally, there are several songs recorded on a magnetic tape, and when you want to listen to which song you want to listen to, the tape recorder stores the song address in advance in the tape recorder's control unit and selects it. is becoming popular.

FIG. 1 is a block diagram of a conventional tape recorder equipped with such a function. In the figure, when play switch 1 is off, AND circuit 3 is enabled for the input of address switch 2. By pressing the address switch 2 when the play switch 1 is off, the on/off signal is input to the counter 8 via the M circuit 3 and the OR circuit 5 and counted. The count output of the counter 8 is always input to the memory determination circuit 9. When the set switch 6 is pressed when the count matches the song address of the song desired, the memory determination circuit 9 stores that the currently input count, that is, the song address has been set. By operating the address switch 2 and set switch 6, a desired song is reserved. Next, when the play switch 1 is pressed, the power supply voltage is inputted to the solenoid control circuit 10, the reset circuit 7, and the AND circuits 3 and 4 via the play switch 1. The solenoid control circuit 10 turns on and controls the play solenoid 12 by its output. Further, the reset circuit 7 generates a differential pulse and resets the counter 8 at the same time as the play switch 1 is turned on. On the other hand, the signals on the magnetic tape 14 are converted into electrical signals by the magnetic head 15 and output to the output terminal 18 via amplifiers 16 and 17. Also, amplifiers 16 and 1
The signal branched at the connection point 7 is sent to the inter-song detection circuit 19.
The signal is input to the AND circuit 4, where it is waveform-shaped and input to the AND circuit 4. Since the AND circuit 4 is now enabled, the output of the song interval detection circuit 19 is input to the counter 8 via the Ni circuit 4 and the OR circuit 5, and is counted every time there is an interval between songs. The song address count by the counter 8 is always input to the memory judgment circuit 9, and the judgment function starts operating by detecting that the play switch 1 is pressed, and the song address being input is set. The output signal is inputted to the solenoid control circuit 11, and the fast forward solenoid 1 is
3, and in the case of a song address that has not been set, the magnetic tape 14 is fast-forwarded to the next song address that has been set. In such a conventional circuit, when the pause button is pressed during automatic performance, tape running stops and the song signal on the tape is interrupted, so the song inter-song detection circuit 19 outputs an inter-song signal, There was a drawback that the address was different.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic magnetic tape playing device which eliminates the drawbacks of the prior art and is capable of continuing the automatic performance from that position without erroneously counting the song address even if the automatic performance is paused. be.

In order to achieve the above object, the present invention provides a data latch circuit between the song interval detection circuit and the counter, stops the song interval detection function only when the pause switch is pressed, and stores the data of the song interval detection signal. It is characterized by holding. The present invention will be explained in detail with reference to an embodiment shown in FIG.

In Figure 2, the same numbers as in Figure 1 indicate the same configuration, and 2
0 is a pause switch, 21 is a latch circuit, 22 is a solenoid control circuit, and 23 is a pause solenoid. After determining the number of songs recorded on the magnetic tape 14, the recording order of the songs is sent to the memory judgment circuit 9 in order to control automatic performance. Memorize the song address shown in advance. This is as described above.

Solenoid control circuit 10 when play switch 1 is off
The play solenoid 12 is in a stopped state, and the AND circuit 3 of the N1 circuits 3 and 4 is enabled in response to the on/off signal of the address switch 2. a. By turning on/off the dress switch 2, the signal is inputted to the counter 8 via the AND circuit 3 and the 0R circuit 5, and the number of times the signal is turned on/off is counted. This counted number is used as a song address and is always input to the memory judgment circuit 9. When the number matches the song number of the song you want to listen to, turn on the set switch 6, and the memory judgment circuit 9 will set the song address at this time. remember things. Note that it is of course possible to set a plurality of song addresses depending on the storage capacity. When the reservation of the desired song is completed using the address switch 2 and the set switch 6 as described above, the play switch 1 and the fast forward switch 11a are then pressed. Power supply voltage is applied to the solenoid control circuit 10, the reset circuit 7, and the AND circuits 3 and 4 via the play switch 1, and the solenoid control circuit 10 and the play solenoid 12 enter the play state. Further, the fast-forward solenoid 13 is driven by the fast-forward switch 11a, and the mechanism enters the song interval detection state. The reset circuit 7 detects that the play switch 1 is turned on, generates a differential pulse, inputs it to the reset terminal of the counter 8, and resets the contents of the counter 8. Note that the song address remains set in the storage determination circuit 9. A for AND circuits 3 and 4
The output of the ND circuit 3 is turned off, and the AND circuit 4 is enabled in response to the input from the latch circuit 21. magnetic tape 1
4, the signal of the song recorded on the magnetic head 15 is converted into an electric signal, and the signal is sent to the output terminal 1 by amplifiers 16 and 17.
Output to 8. The signal branched from the connection point between the amplifiers 16 and 17 is input to a song interval detection circuit 19, and the signal whose waveform has been shaped here is input to a latch circuit 21 composed of, for example, a D latch. The enable terminal of the latch circuit 21 is connected in parallel with the input terminal of the pause solenoid control circuit 22, and unless the pause switch 20 is pressed, the input and output data of the latch circuit 21 are equal. If the pause switch 20 is currently off, the signal whose waveform has been shaped by the song interval detection circuit 19 passes through the latch circuit 21, and then the AN
The D circuit is inputted to the counter 8 via the 0R circuit 5.
When the counter 8 counts the number of songs and transmits the song address to the memory judgment circuit 9, the judgment function of the memory judgment circuit 9 starts operating because the play switch 1 is pressed, and the currently input song address is reserved. , determines whether it is set or not and outputs a signal, and the output signal is transmitted to the solenoid control circuit 11 and the fast-forward solenoid 13, and if the reservation is set, the fast-forward solenoid 13 is turned off;
If reserved, the fast forward solenoid 13 is kept on to fast forward the tape. When the pause switch 20 is pressed during playback, the solenoid control circuit 22 is activated and the pause solenoid 23 is turned on, stopping the tape running.As the tape running is also stopped, the recorded signal on the magnetic tape 14 is no longer reproduced, and there is a gap between songs. However, the enable terminal of the latch circuit 21 receives the ON signal of the pause switch 20, and the latch circuit 21 does not accept data input and continues to hold the output data up to that point.

When the pause is released, the song signal is detected and input to the latch circuit 21, but since the pause switch 20 is released, the latch circuit 21 is in an enabled state, and the signal is transmitted to the counter 8. be done. As a result, when the pause switch 20 is pressed during play to enter the pause state and start playing again, even if the detection signal from the tape is interrupted, the inter-song signal is not transmitted to the counter 8 that counts the inter-song period, and the playback is performed automatically without erroneous counting. is possible again. As described above, even if a pause occurs during playback of an automatic performance, it is now possible to restart the automatic performance without erroneously counting the pause state as an inter-song signal as in the past.

Incidentally, the conventional device has the inconvenience of having to rewind the tape to the starting point and then start again when starting automatic performance again after a pause.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional device, and FIG. 2 is a block diagram of an embodiment of the device of the present invention. 1: Play switch, 2: Address switch, 3, 4:
AND circuit, 5: OR circuit, 6: Set switch, 7:
Reset circuit, 8: Counter, 9: Memory judgment circuit, 12
: Play solenoid, 13: Fast forward solenoid, 19: Song interval detection circuit, 20: Pause switch, 21: Latch circuit, 23: Pause solenoid.

Claims (1)

[Claims] 1. A first means for specifying and storing a song address of a desired song among songs recorded on a magnetic tape by using a non-signal portion placed between songs as a song address, and a first means for detecting a song interval on a magnetic tape. and a third means for comparing the number of inter-song detection signals outputted from the second means with a song address designated and stored in advance by the first means; and a fourth means for shifting from the inter-music selection state to the playback state when the comparison outputs match, wherein the output of the inter-music detection signal by the second means is paused based on a pause operation. A means for holding the output of the inter-song detection signal by holding it in the state before the operation and releasing the output of the inter-song detection signal when the pause operation is released, and transmitting the output of the inter-song detection signal, and counting the inter-song detection signal due to the pause operation. An automatic magnetic tape playing device characterized by stopping the magnetic tape.