JPS624953Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tape recorder with a radio that uses a counter display section to indicate the tuning of a radio receiver.

Recently, tape recorders combined with radio receivers have been widely used.

When such a tape recorder with a radio is used as a radio receiver, it is extremely convenient to use it if it is provided with a receiver tuning display function. Therefore, conventionally, a dedicated display device has been provided as such a synchronized display. However, with the recent trend toward ultra-miniaturization of tape recorders, it has become extremely difficult to provide a dedicated display device due to restrictions on shape and size.

Nowadays, tape recorders equipped with electronic counters that electrically count pulses proportional to the running length of the tape and digitally display the pulses on a counter display section using liquid crystal have appeared.

Therefore, this invention focuses on this, and by using the counter display section to display the tuning of the radio receiver, it does not interfere with the trend toward miniaturization of tape recorders, and moreover, it is possible to tune the radio receiver. , an object of the present invention is to provide a tape recorder with a radio that clearly displays out-of-tuning and allows easy confirmation.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 shows a tape recorder incorporating a radio receiver to which this invention is applied. In the figure, 1 is a tape recorder main body, and on the front of this main body 1 are a cassette loading section 2, a speaker 3, a dial scale 4, and a counter display using a liquid crystal (or LED) for electronically displaying the running amount of the tape. REC button 6 for tape recorder, PLAY 7 button and
A STOP button 8 is arranged, and a tuning dial 9 for a radio receiver, a tone control dial 10, and a volume 11 are also arranged on the lower side.

Next, the specific structure of this invention will be explained with reference to FIG. In the figure, reference numeral 12 denotes a pulse oscillator, and this oscillator 12 detects the rotation of the take-up shaft 13 (or delivery shaft 14) of the tape recorder, and generates one pulse for each rotation of the shaft 13. The output terminal of this pulse oscillator 12 is connected to a counter 15. This counter 15 is designed to count output pulses given by the pulse oscillator 12.

Decoder driver 1 is connected to the output terminal of counter 15.
A counter display section 17 is connected via 6. This counter display section 17 is for electronically displaying the contents of the counter 15 in digital form.

On the other hand, 18 is a radio receiver, with an antenna 19,
It is comprised of a mixing circuit 20, a local oscillation circuit 21, an intermediate frequency amplification circuit 22, a detection circuit 23, a volume control 24, a power amplifier 25, a speaker 26, and the like. Such a radio receiver 18 is well known, and its explanation will be omitted here.

In this case, the radio receiver 18 is provided with a radio/tape recorder switch 27 between the detection circuit 23 and the volume control 24, and when the switch 27 is switched to the tape recorder side, the playback head 28 of the tape recorder is connected. An amplifier 29 is connected to a power amplifier 25 via a volume control 24 to form a recording/reproducing circuit.

With such a configuration, the output terminal of the intermediate frequency amplification circuit 22 of the radio receiver 18 is connected to the receiver 18.
A detector, for example a level detector 30, for detecting out-of-tuning and tuning is connected. This level detector 30
The radio receiver 18 generates an "L" level when out of tune and an "H" level when tuned, and consists of a level comparator.

Further, the output terminal of this level detector 30 is connected via an inverter 31 to one input terminal of a NAND gate circuit 32 as a display control circuit. An oscillation circuit 33 is connected to the other input terminal of this NAND gate circuit 32. This oscillation circuit 33 generates "H" and "L" outputs at a cycle of, for example, about 10 Hz.

Further, the output terminal of the NAND gate circuit 32 is connected to the decoder driver 16. In this case, the decoder driver 16 controls the drive of the counter display section 17 by the output of the NAND gate circuit 32, and when the output of the NAND gate circuit 32 is "H", it generates an output "L" and drives the counter display section 17. When the output is "L", the display on the counter display section 17 is turned off by the output "H".

In this configuration, when used as a tape recorder, when the pulse oscillator outputs one pulse for each rotation of the shaft 13 due to tape running, this is counted by the counter 15, and this count output is sent to the decoder driver 16. It is digitally displayed on the counter display section 17 via the counter display section 17.

In this case, the selector switch 27 is switched to the tape recorder side, so when the PLAY button 7 in FIG. It is reproduced from the speaker 26.

Next, when used as a radio receiver, the tuning dial 9 shown in Fig. 1 is used to select a broadcast station, but if the tuning is currently out of tune, the output of the level detector 30 is as shown in Fig. 3a. As a result, the inverter 31 generates an output "H" as shown in FIG. more third
As shown in figure c, “H” and “L” at a cycle of about 10Hz.
pulse output is given. Therefore, as shown in FIG. 3d, the NAND gate circuit 32 repeatedly outputs "H" and "L" according to the output of the oscillation circuit 33, which is applied to the decoder driver 16. As a result, the decoder driver 16 generates the output shown in FIG. 3e and drives the counter display section 17 intermittently, causing the counter display section 17 to blink.

After that, when the tuning is achieved, the output of the level detector 30 changes to "H" as shown in FIG. 3a.
As a result, the output of the inverter 31 becomes "L" as shown in FIG. 3b. Therefore, the NAND gate circuit 32 continuously generates an "H" output as shown in FIG. 3d, regardless of the output of the oscillation circuit 33. As a result, the decoder driver 16 generates an output "L", causing the counter display section 17 to continuously light up and the drive ratio counter display section 17 to continuously light up.

Therefore, with this configuration, the counter display section can have a radio receiver tuning display function, so it takes up less space on the tape recorder body compared to the conventional case where a special display device is provided for displaying tuning. can be used effectively, and this can greatly contribute to the trend toward ultra-miniaturization of tape recorders. In addition, since the tuning of the radio receiver at this time is displayed by changing the display from intermittent lighting to continuous lighting on the counter display section, it is possible to clearly display the out-of-tuning and tuning of the radio receiver. By displaying the radio reception status on a counter display section having a relatively large area, it is possible to easily check whether the radio receiver is out of tune or not.

It should be noted that this invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.
For example, in the above-described embodiment, the case of a tape recorder incorporating a radio receiver has been described, but the present invention can also be applied to a type of tape recorder to which a radio receiver is connected. Further, in the above-described embodiments, the display contents of the counter display section are described in the case of a tape counter, but the present invention can also be applied to displaying the reception frequency.

As described above, according to this invention, by using the counter display section to display the tuning of the radio receiver, it is possible to clearly indicate the tuning or untuning of the radio receiver without interfering with the trend toward miniaturization of tape recorders. can be displayed and easily checked. We can provide tape recorders with radios.

[Brief explanation of the drawing]

FIG. 1 is a front view of a tape recorder with a radio to which this invention is applied, FIG. 2 is a block diagram showing an embodiment of this invention, and FIG. 3 is a time chart for explaining the embodiment. 1...Tape recorder body, 2...Cassette loading section, 3...Speaker, 4...Dial scale, 5...Counter display section, 6...REC button, 7
... PLAY button, 8 ... STOP button, 9 ... Tuning dial, 10 ... Tone control dial, 11 ... Volume, 12 ... Pulse oscillator, 13 ... Winding shaft, 14 ... Delivery shaft, 15 ……
Counter, 16... Decoder driver, 17...
Counter display section, 18...Radio receiver, 19...
... Antenna, 20 ... Mixing circuit, 21 ... Local oscillation circuit, 22 ... Intermediate frequency amplification circuit, 23 ... Detection circuit, 24 ... Volume control, 25 ...
...power amplifier, 26...speaker, 27...selector switch, 28...playback head, 29...playback amplifier, 30...level detector, 31...inverter, 32...NAND gate circuit, 33...oscillator circuit .

Claims (1)

[Scope of utility model registration request] A combination of a radio receiver and a counter display section for electronically displaying the amount of tape travel, etc., includes a detector for detecting out-of-tuning and tuning of the radio receiver, and a detector for detecting out-of-tuning. A tape recorder with a radio, comprising: a display control circuit that lights up the counter display part intermittently when the detector detects synchronization, and lights the counter display part continuously when the detector detects synchronization.