JPS6241432Y2 - - Google Patents

Description

[Detailed description of the invention] This invention combines a radio receiver capable of receiving traffic information and a cassette tape recorder equipped with a so-called song cue function that cues the beginning of a song by detecting unrecorded portions of the tape. This invention relates to a cassette tape recorder with a radio for use in a vehicle.

In Europe, especially in West Germany, traffic information systems that use FM broadcasts have been adopted for drivers, and when traffic information starts even while a tape is being played, the tape is automatically transferred to the radio. The switching traffic information is configured so that it can be heard,
Drivers can always listen to traffic information while driving.

On the other hand, recent cassette tape recorders detect unrecorded parts of the tape by switching the tape drive to high-speed drive and retracting the magnetic head to a position where it slightly contacts the tape. When detected, there are devices equipped with a so-called song cue function that can play the song from the beginning by canceling high-speed tape drive and returning to playback drive, which is intended to improve operability. .

In a device equipped with the above-mentioned radio receiver capable of receiving traffic information and a cassette tape recorder equipped with a song cue function, the traffic information is started while the song is cueing. If the beginning of the song continues after the beginning of the song ends, when the traffic information ends and the radio switches to the tape, the tape is being driven at the playback speed from the end of the beginning of the song, and will be played from the middle of the song. As a result, the cueing operation that had been painstakingly carried out became meaningless, and the cueing function could not be fully utilized.

Therefore, the present invention was devised in view of this point.
If the traffic information continues even after the beginning of the song ends, the tape drive motor is stopped when the beginning of the song ends, and the motor is driven again when the traffic information ends. To provide a cassette tape recorder with a radio capable of reproducing a song from the beginning when returning to the tape after finishing playing.

Embodiments of the present invention will be described below with reference to the drawings.
Reference numeral 1 denotes a radio receiving section, and the demodulated output is guided to a power amplifier 3 via a radio/tape switching circuit 2 and is amplified from a speaker 4. Reference numeral 5 denotes a start signal detection circuit for detecting the traffic information start signal _S0 transmitted at the start of traffic information, the output of which is led to the radio/tape switching circuit 2, which switches to the tape side. If so, it acts to switch to the radio side. Traffic information start signal
_S0 is generated while traffic information is being provided, during which time the signal is forcibly switched to the radio side. 6 is a preamplifier that amplifies the playback output from the magnetic head 7, and the amplified output is transmitted to the radio tape switching circuit 2.
guided by. Reference numeral 8 denotes a non-recording detection circuit connected to the preamplifier 6 via a switch _9a that is closed when the beginning of a song is detected. It is configured to drive a release means 10, such as a plunger, which acts to cancel high-speed tape drive due to an unloading operation and return to playback drive. Reference numeral 11 denotes a motor control circuit for a cassette tape recorder. Power is supplied to the motor 12 via a tape switch 13 that is closed in connection with the movement of the cassette to the playing position, and power is supplied via a switching transistor 14. It is configured to be grounded and to be driven and controlled by switching the transistor 14. 15
is a one-shot multivibrator which is activated when the tape switch 13 is closed.The output is led to the set terminal S of the flip-flop 17 through the OR gate 16, and when the tape starts playing, the flip-flop 17 is set, and the set output Q is set to the above-mentioned level. By making the switching transistor 14 conductive,
It is configured to drive the motor 12. Further, a traffic information start signal _S0 is introduced to the set terminal S via an inverter 18 and an OR gate 16, and a flip-flop 17 is set when the traffic information ends. On the other hand, flip-flop 17
The traffic information start signal _S0 is led to one input of the reset terminal R of the , and the other input is connected to the resistor 19 connected in series between the power supply and the ground and the switch 9b that is closed when the song starts. The output of the AND gate 20 connected to the point is connected. switch 9
The circuits a and 9b are constructed so as to be closed in conjunction with the beginning of a song, and are opened when the non-recording detecting circuit 8 detects a non-recording and returns from high-speed tape drive to playback drive. Although not shown, in conjunction with the movement of the cassette to the playing position, the radio/tape switching circuit 2 is switched to the tape side, and power is supplied to the preamplifier 6 and non-recording detection circuit 8 to enter the tape playing state. . The radio receiving section 1, the start signal detection circuit 5, and the power amplifier 3 are always energized and are set in an operating state even when a tape is being played.

Next, the operation of the present invention having such a configuration will be explained.

First, while listening to the radio, when a cassette is loaded and moved to the playing position in order to play a tape, the radio/tape switching circuit 2 is switched to the tape side, and the tape switch 13 is closed to switch the entire tape section. When energized, the one-shot multivibrator 15 is activated, and the pulse output is passed through the OR gate 16 to the flip-flop 17.
When the flip-flop 17 is set, the switching transistor 14 is made conductive, and the motor 12 is driven to start playing the tape. Therefore, when the traffic information starts during the tape playing (time point T2 in Figure ₂ ), the start signal detection circuit 5 generates the start signal _S0 , and the radio/tape switching circuit 2 is switched to the radio side. By leading the traffic information output to the speaker 4 and reproducing it, the driver can listen to the traffic information even while listening to the tape. At this time, the traffic information start signal _S0 is guided to the motor control circuit 11 , so that the AND gate 20, whose one input is at the "H" level because the beginning of the song is not being performed, is opened, and the reset terminal is connected to the AND gate 20. By inputting the signal to R, the flip-flop 17 is reset, the switching transistor 14 is turned non-conductive, and the motor 12 is stopped. The stop of the motor 12 continues while the traffic information is broadcast and the traffic information start signal _S0 is generated, and when the traffic information start signal _S0 disappears at the end of the traffic information (at the time of T3 in Fig. ₂ ). , inverter 1
The flip-flop 17 is set by the output of 8 via the OR gate 16, so that the switching transistor 14 is turned on and the motor
is driven again. Therefore, when the tape performance is resumed after the traffic information ends, the continuation of the tape performance that was being played until the traffic information started can be played back.

Next, the operation during the beginning of the song will be explained.
When the switches 9a and 9b are closed by the song cue operation, the tape is driven at high speed, and traffic information broadcasting is started while the non-recording detection circuit 8 is detecting non-recording, the radio is activated in the same manner as described above. - The tape switching circuit 2 is switched to the radio side and traffic information is received. Since the switch 9b is closed at this time, even if the traffic information start signal _S0 is generated, the AND gate 20 will not be opened as described above, the flip-flop 17 will not be reset, and the motor 12 will not receive the traffic information. It continues to be driven during the middle of the song and continues to locate the beginning of the song. In this case, as shown in FIG. 3, if the traffic information broadcast ends before the beginning of the song is finished by detecting the unrecorded portion, the radio/tape switching circuit 2 is returned to the tape side, but the song is still being played. A cue operation is in progress and the tape is being driven at high speed. And when the unrecorded part arrives,
When the detection signal _S1 is generated from the non-recording detection circuit 8, the plunger 10 of the release means is driven to cancel the tape high-speed drive and return to the playback drive, thereby making it possible to play the next song from the beginning. I can do it. Switch 9 is activated in conjunction with the return to regeneration drive.
a and 9b are also opened, and the cueing operation is completed. still,
When the non-recording detection signal S ₁ is generated, the input of the AND gate 20 becomes "H" level due to the opening of the switch 9b, but at this time, the traffic information start signal S ₀ of one input has already been detected.
has disappeared, the AND gate 20 is not opened, the flip-flop 17 remains set, and the motor 12 continues to be driven.

However, as shown in FIG. 4, if the traffic information broadcast continues even after the beginning of the song is finished, the detection signal _S1 is generated due to non-recording detection, and the playback drive is resumed as described above. , switch 9a,
9b is opened, AND gate 20
is opened to reset the flip-flop 17 and stop the motor 12. Therefore, the tape is stopped at the unrecorded part. While the traffic information is being broadcast, the flip-flop 17 continues to be reset, and when the start signal _S0 disappears due to the end of the traffic information, the flip-flop 17 is reset by the output of the inverter 18. The motor 12 is then driven again. As the traffic information ends, the radio/tape switching circuit 2 switches to the tape side, and the motor 12 is driven to reproduce the song from the beginning.

As mentioned above, in the cassette tape recorder with radio of the present invention, if traffic information broadcasting is started during the beginning of a song, and the beginning of the song ends while the radio/tape switching circuit is switching to the radio side. is configured so that the tape drive motor is stopped and then driven again when the traffic information broadcast ends, so that when the beginning of a song is performed, the next song can always be played from the beginning. It has characteristics.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure of a cassette tape recorder with a radio according to the present invention, and FIGS. 2, 3, and 4 are diagrams for explaining the operation of FIG. 1. 1...Radio receiving unit, 2...Radio/tape switching circuit, 3...Power amplifier, 5...Traffic information start signal detection circuit, 6...Preamplifier, 7...Magnetic head, 8...No recording Detection circuit, 11 ...Motor control circuit.

Claims (1)

[Scope of utility model registration request] A cassette tape recorder with a radio that is equipped with a radio receiver capable of receiving traffic information and a cassette tape recorder equipped with a song cue function that cues the beginning of a song by detecting unrecorded portions of the tape. a traffic information start signal detection circuit;
A radio tape switching circuit, a non-recording detection circuit,
Equipped with a motor control circuit, the radio/tape switching circuit is automatically switched to the radio side when the traffic information start signal detection circuit detects the start of traffic information while the non-recording detecting circuit detects the non-recording of the song. At the same time as switching traffic information is received, the motor of the tape recorder is driven and non-recording detection is continued, and when the non-recording detection is completed while such traffic information is being received, the motor is activated from the time when this detection ends until the time when the traffic information ends. The radio tape switching circuit and motor control circuit automatically switch the radio tape switching circuit to the tape side when the traffic information ends, and drive the motor again to play the song from the beginning. A cassette tape recorder with a radio, which is characterized by controlling.