JPS6016015B2 - Track interval detection device for tape recorders, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track interval detection device for a tape recorder or the like.

When listening to a magnetic tape on which a plurality of songs (music, lectures, stories, etc.) have been recorded, set in a tape recorder, if the song you are listening to is near the end, the tape recorder is naturally operated in fast forward mode.

Then, when the tape reaches a song that you don't like (this is done based on your general sense), you won't know unless you cancel the fast forward operation and listen to the song through the speakers, so you have to start playback. As a result of the playback operation, if the tape has not been advanced to the point at which the last song is being listened to, the user is forced to fast-forward the tape again. I repeat these tedious operations over and over again to listen to songs that I enjoy listening to. There are also tape recorders on the market that are equipped with a song interval detection device that skips the currently playing song and plays the next song while the tape is being played back. This inter-song detection device is useful only when locating the beginning of the next song.

However, when the listener does not want to listen to the next song, but wants to listen to a song several songs later, the user has to repeat the push button operation for detecting the song interval many times, which is extremely troublesome.

Of course, there are tape recorders on the market that are equipped with a device that allows the tape to run at high speed to the location where the most popular songs are located, but this only determines where on the tape the most popular songs are recorded. It assumes that you know where the most popular song is recorded, and if you don't know where the most popular song is recorded, there is nothing you can do about it. It has no choice but to operate like a song interval detection device. The present invention has been made in view of the current state of the prior art, and it is possible to play only the beginning of each song, for example, if the song is 3 minutes long, only the first part of the song is played, and then the tape is played back. An object of the present invention is to provide an inter-track detection device for a tape recorder or the like that fast-forwards the tape and when it reaches the beginning of the next track, plays only the intermission for one night, and then fast-forwards the tape again. It is something to do.

That is, according to the present invention, it is possible to quickly listen to a song without knowing where on the tape the song that is difficult to listen to is recorded.
The present invention will be described in detail below with reference to an embodiment shown in the drawings.

Referring to the accompanying drawings, 1 is a magnetic tape, 2 is a recording/playback head, 3 is an amplifier, and 4 is a rectifier circuit.

This rectifier circuit 4 outputs a constant output when the magnetic head 2 detects a tape recording signal and outputs it as a reproduction output, and does not output when the head 2 does not detect a recording signal.

In other words, playback output is obtained during the song portion, but no playback output is obtained between songs. 5 is a switch circuit that provides a control signal for either high-speed rotation or low-speed rotation to the control circuit 7 of the two-speed motor 6 that controls the running speed of the tape 1; 8 is a transistor; 9 is a flip-flop; , 10 is a transistor, 11 is a resistor, 12 is a capacitor that forms a charging/discharging circuit with this resistor 11, 13 is a waveform shaping circuit (amplifier), 1
Reference numeral 4 indicates a push button for starting a song interval detection operation, which will be described in detail later. Reference numeral 15 indicates a thyristor. Reference numeral 16 indicates an LED. Reference numeral 17 and 18 indicate interlocking switches.

Now, when there is a recording signal on tape 1, the recording signal is detected by head 2, amplified and waveform-shaped by amplifier 3, and sent through volume adjustment volume 19, AF amplifier 20, and speaker 21 to play a normal song. It can be played as.

On the other hand, the reproduced output of the recording signal that has entered the rectifier circuit 4 is rectified and input to the switch circuit 5 and the transistor 8, respectively.

In the switch circuit 5, the reproduced output turns on the transistor 22 and turns on the transistor 23, thereby applying the power source voltage B to the anodes of the diodes 15 and 16. Then, the reproduced output that enters the transistor 8 turns on this transistor 8, and lowers the input level to the input section 9a of the flip-flop to the ground potential.

Then, the output portion 9b of the flip-flop 9 becomes low level, the transistor 10 is turned off, and the power source voltage B starts to be charged to the capacitor 2 through the resistor 11.

However, until this charging voltage reaches a certain level, the amplifier 13 switches the output between the fixed contact B and the movable contact C of the switch 17.
The low speed control input is introduced into the motor control circuit 7 to which the cathode of the thyristor 15 is connected.

As a result, the motor 6 rotates at the reproduction speed (low speed).

Note that the diode 16 is a lamp for indicating that the song interval is being detected. However, when the charging voltage to the capacitor 12 increases and an output is derived from the charging voltage to the amplifier 13, the fixed contact B of the switch 17 and the movable contact C
The output is input to the gate of the thyristor 15 through the thyristor 15, and the thyristor 15 is turned on.The voltage generated by the current flowing through the thyristor 15 changes the control content of the control circuit 7, and the motor 6 rotates at high speed to rotate the tape. 1 is sent at high speed. Next, when a recording signal is not obtained from the tape 1 between songs, no output is obtained from the rectifier circuit 4, the switch circuit 5 does not work, the motor 6 rotates at a low speed, and the tape is run at a low speed.

Since the transistor 8 is OFF, the output part 9b of the flip-flop 9 is made to output an output of the level /. .

When the head 2 detects the beginning of the next song, an output is obtained from the rectifier circuit 5, the switch circuit 5 is activated, and at the same time, the transistor 8 turns ○N, the output of the flip-flop 9 is inverted, and the transistor 1 turns FF. , until the capacitor 12 starts to be charged and reaches a certain charging voltage, the tape is sent at the playback speed and the playback signal, that is, the song, is sent to the AF amplifier 20.
, can be heard through the speaker 21. In this way, the operator can immediately tell what song it is by listening to only the beginning of the song, and if he does nothing, the tape will immediately run at high speed, so even if he does not know where the most popular song is, he can easily tell what song it is. You can quickly find the recording location without any complicated operations.

If the manual switches 17 and 18 are turned OFF when the user is playing a song that is difficult to listen to, the motor 6 rotates to run the tape at the playback speed. Even if the song interval detection push pin 14 is not pressed, if the movable contacts C of the switches 17 and 18 are closer to B than the fixed contact A, the above operation will occur, but the movable contact C
When is at the fixed point A, it is good to perform the inter-song detection operation every time. Further, the push pin 14 is convenient to use when the middle of a song is being played.

In this way, according to the present invention, only the beginnings of multiple songs are played back, and the rest of the tape is run at high speed, so when it is unclear where the most popular song is recorded, it can be quickly played back. The tape can be run to the desired song with a simple operation.

[Brief explanation of the drawing]

The drawing shows an embodiment of a song interval detection device for a tape recorder or the like according to the present invention. In the diagram, 1...Tape, 2...Head, 3...Amplifier, 4
...... Rectifier circuit, 5... Switch circuit,
6...Motor, 7...Motor rotation speed control circuit, 9...Flip-flop, 13...Amplifier, 14
... Push sword for detecting between songs, 15 ... Thyristor, 16 ... ...LED, 1 7, 1 8... switch, 2 0... AF amplifier, 21... speaker.

Claims (1)

[Claims] 1. In a device that uses a magnetic head to detect song gaps on a magnetic tape to control a motor, the motor is configured to run the tape at low or high speed, a control circuit that rotates the motor at low or high speed, and a charging/discharging circuit. , a charging/discharging circuit control means for causing the charging/discharging circuit to perform a charging operation while a reproduction output is obtained from the magnetic tape and for causing the charging/discharging circuit to perform a discharging operation when the reproduction output disappears; and charging for the charging/discharging circuit. a detecting means for detecting the charge level and outputting an output when the charge level is above a certain level, and a control circuit for rotating the motor at a low speed when no playback output is being obtained from the magnetic tape to obtain the playback output. A track interval detection device for a tape recorder, etc., comprising a switch circuit which is in an operating state and, when there is an output from the detection means in such an operating state, causes the control circuit to rotate the motor at high speed.