JPS5932003Y2 - 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 radio-equipped tape recorder that fits in a Y-shirt pocket, the space within the case is extremely narrow, so it is important to arrange each component compactly within the metal case.

On the other hand, when the component layout in such a case is made more compact, the motor, AC bias oscillation circuit, tape recorder circuit, radio antenna and tuner circuit are located close to each other, so motor noise and the oscillation output of the oscillation circuit are affected by the tuner circuit. However, the performance of a brass tape recorder with a radio is said to be significantly degraded, such as noise in radio broadcasts and noise in recordings of radio broadcasts.

Furthermore, since it is extremely small and can be used in any location, it is conceivable that the local transmission of the tuner circuit may have an adverse effect on the outside of the case.

The present invention was developed in view of the above circumstances, and it can be made more compact by making effective use of the space within the case, and is more compact than the layout of components.Moreover, the motor noise of the tape recorder circuit and the oscillation output of the oscillation circuit can affect the tuner circuit. It is an object of the present invention to provide a tape recorder with a radio that can remove metal and also prevent local transmission from a tuner circuit from spreading to the outside of the case.

Hereinafter, one embodiment of the present invention will be explained according to the gold cycles a and b.

That is, in the figure, reference numeral 1 denotes a case of a tape recorder with a radio.A loading part for a cassette tape 2 is provided at the upper part of the case 1 in the drawing, and a motor 3 is disposed close to the tape loading part.

The motor 3 is connected to a flywheel 5 through a belt 4, and is driven by a tape drive capstan shaft 6.

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

This 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 a tape recorder circuit including the motor 3. .

On the other hand, a 9-karat gold ferrite antenna for radio is arranged at the lower end of the case 1 as shown in the drawing.

A 10-karat gold speaker is placed in front of the case between the antenna 9 and the amplifier board 1.

Then, batteries 11 and 11 gold are arranged vertically between the yoke parts of this speaker 10, and these batteries ICl
A tuner board made of 12 gold is placed in the space behind the yoke between the two.

This tuner board 12 is provided with a radio tuner circuit.

However, with this configuration, the batteries are placed between the yoke parts of the speaker, and the tuner board 4 is provided in the space behind the yoke part between these batteries, making use of the space behind the speaker that has not been used much in the past. Since it is used for the purpose of making the parts arrangement inside the case more compact, it can contribute to further miniaturization of the case.

1. The tuner circuit is four-layered on the metal part of the speaker and battery, and the surrounding area is shielded four times, so it is possible to eliminate the influence of the tape recorder circuit's motor noise and the oscillation output of the oscillation circuit, and at the same time, the tuner circuit's It is possible to completely prevent local transmissions from spreading outside the case, which also makes it possible to meet FCC (Federal Communications Commission) standards.

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

For example, if the metal case 4 is used in place of the case 1, the sound effect will be better than that of the shield around the tuner circuit, and the above sound effect will be more reliable.

As described above, according to the present invention, the space within the case can be effectively used and the component arrangement can be made more compact than in the fourth example, and the influence of the motor noise of the tape recorder circuit and the oscillation output of the oscillation circuit on the tuner circuit can be eliminated. In addition, it is possible to provide a tape recorder with a radio that can completely prevent the local transmission of the tuner circuit from spreading to the outside of the case.

[Brief explanation of drawings]

Figures a and b show an example of a tape recorder with a radio according to the present invention, and a is a front view of the case with the front metal removed.
b is a longitudinal sectional view. 1... Case, 2... Cassette case, 3... Motor, 4... Belt, 5...
... Flywheel, 6 ... Capstan shaft, 7 ... Amplifier board, 8 ... AC bias oscillation circuit, 9 ... Ferrite antenna , 10...Speaker, 11...Battery,
12...Tuner board.

Claims (2)

[Scope of utility model registration request] (1) A tape recorder with a radio in which batteries are placed between the yoke parts of the speakers housed in the case, and a radio tuner circuit 4 is placed between these batteries and in the space behind the yoke. (2) A tape recorder with a radio according to claim 1, wherein the case includes a metal case.