JPS5932002Y2 - tape recorder with radio - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an ultra-small tape recorder with a radio.

For example, in the case of an ultra-small tape recorder with a radio that fits in the pocket of a Y-shirt, the space within the case is extremely narrow, so each component is arranged compactly within the metal case.

Therefore, in such a tape recorder with a radio, the tape recorder circuit, which includes a motor and an AC bias oscillation circuit, and the radio reception circuit, which includes an antenna and a tuner circuit, are provided in the case in close proximity to each other.

However, if these metals are placed close to each other, noise generated from the motor of the tape recorder circuit and harmonic components of the oscillation output of the oscillation circuit may be received by the antenna of the radio receiving circuit, causing noise to be heard in radio broadcasts. Also, when recording radio broadcasts, the performance of the tape recorder with radio may be significantly degraded, such as noise being introduced into the recording.

The present invention was developed in view of the above circumstances, and by improving the arrangement and configuration of each component in the case, it is possible to prevent the motor noise of the tape recorder circuit and the oscillation output of the oscillation circuit from mixing in the received signal of the radio receiving circuit. The purpose of this invention is to provide a tape recorder with a radio that can prevent the above problems.Hereinafter, an embodiment of the present invention will be described with reference to Figures 1a and 1b and Figure 2.

That is, in FIGS. 1a and 1b, 1 is a case of a tape recorder with a radio, and a loading section 4 for a cassette tape 2 is provided in the upper part of the case 1 as shown in the figure, and a motor 3 is disposed close to this tape loading section.

The motor 3 is connected to a flywheel 5 through a belt 4 and drives a spindle shaft 6 for driving the tape.

Further, an amplifier board 7 made of gold is placed behind the motor 3.

The amplifier board 7 is provided with a main amplifier for both a radio and a tape recorder, and a preamplifier for the tape recorder, and is further provided with an AC bias oscillation circuit 8 for the tape recorder, which constitutes the motor 3 alloyed tape recorder circuit. .

On the other hand, a tuner board 9 gold is disposed at the lower end of the case 1 in the drawing.

This tuner board 9 is provided with a radio tuner circuit and a ferrite antenna 10 to constitute a radio receiving circuit.

A battery chamber 11 gold is disposed between the tuner board 9 and the amplifier board 7, and a spica 12 gold is disposed at the front of the case between the battery chamber 11 and the amplifier board 1.

In this case, the above components are electrically connected as shown in FIG.

That is, the tuner circuit 1 of the antenna 10 and the gold tuner board 9
3, and an old microphone 14 is connected to the playback/recording switch 15 and the preamplifier 16 of the amplifier board T.

The tuner circuit 13 and the preamplifier 16-karat gold changeover switch 17 are connected to the main amplifier 18 of the amplifier board 7.

A speaker 12 is connected to this main amplifier 18.

Further, the recording/playback head 194 is connected to the preamplifier 16 via the changeover switch 15, and is also connected to the main amplifier 18 of the amplifier board 7 and the AC bias oscillation circuit 8 via another playback/recording changeover switch 20.

According to such a configuration, a battery compartment and a speaker are placed between the motor and oscillation circuit, Kanekura's tape recorder circuit, and the antenna and tuner circuit, Kanekura's radio receiving circuit, to maximize the separation between these circuits. Therefore, it is possible to prevent noise generated from the motor and harmonic components of the oscillation output of the oscillation circuit from entering the radio antenna, thereby preventing a decrease in the performance of the tape recorder with radio.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications within the scope without changing the gist of the invention.

As described above, according to the present invention, by improving the arrangement of each component within the case, it is possible to prevent the motor noise of the recorder circuit and the oscillation output of the oscillator circuit from being mixed into the received signal of the radio receiving circuit. We can provide a tape recorder with radio.

[Brief explanation of drawings]

Figures 1a and 1b show an embodiment of a tape recorder with a radio according to the present invention. Figure 1a is a front view of the case with the front metal removed, Figure 2 is a vertical view, and Figure 2 is a block diagram of the same embodiment. It is. 1... Case, 2... Cassette tape, 3... Motor, 4... Belt, 5...
... flywheel, 6 ... capstan shaft, 7 ... amplifier board, 8 ... AC bias oscillation circuit, 9 ... tuner board, 10・
... Ferrite antenna, 11 ... Battery compartment, 12 ... Speaker, 13 ... Tuner circuit, 14 ... R. Microphone, 15, 1
7, 20...Choice switch, 16...
Preamplifier, 18... Main amplifier, 19...
...Recording and playback head.

Claims (2)

[Scope of utility model registration request] (1) A tape recorder with a radio in which a battery compartment is arranged between a tape recorder circuit including a motor and an oscillation circuit housed in a case, and a radio reception circuit containing a radio antenna and tuner circuit. (2) A tape recorder with a radio according to claim 1, which is a utility model, in which a battery compartment and a speaker are disposed between the tape recorder circuit and the radio receiving circuit.