JPS6041027Y2 - cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette tape recorder, and more particularly to a cassette tape recorder equipped with an organic microphone device.

Conventional cassette tape recorders usually have a microphone unit built into the tape recorder housing, making it possible to record without the need for a microphone.

Furthermore, there is also known a cassette tape recorder in which the built-in microphone unit is detachably attached to the tape recorder housing, especially when it is desired to record with a microphone close to the sound source.

However, in both tape recorders, the microphone device had a rather poor organic performance, and the cassette tape recorder had the disadvantage of not being able to provide sufficient mobility.

The present invention eliminates the above-mentioned drawbacks, and provides a highly mobile cassette tape recorder with an organic microphone device.

An embodiment of a cassette tape recorder according to the present invention will be described below with reference to the drawings.

The cassette tape recorder according to the present invention has a main body 12 including a first microphone unit 11 housed and fixed in a housing 10 so as to be able to record by itself, and an organic relationship with the first microphone 11. and a microphone device 13 provided therein.

More specifically, the first microphone unit 11 is arranged at a slightly corner inside the casing 10 of the tape recorder main body, and the sound receiving surface 14 is arranged toward the front of the casing 11.

The first microphone unit 11 is connected to a recording magnetic head 16 via an electric recording device 15 provided within the housing 10, as shown in FIG.

Furthermore, a recording machine section (not shown) related to the magnetic head 16 and an FM radio receiver (not shown) are built into the housing 10.

In FIG. 1, 17 is a group of buttons for operating the recording mechanism section;
18 is a lid for storing a cassette; 19 is a dial display section of the FM radio receiver; 20 is a power switch knob for the radio receiver; 21 is a dial operation knob; 22 is a power switch for the entire device; 23 24 and 25 are a volume adjustment knob and a sound quality adjustment knob, respectively.

The housing 10 is provided with a recess 30, the opening of which is directed toward the top surface of the housing 10.

This recess 30 is located above the first microphone unit 11, and connection terminals 31 and 32 are provided protruding from the bottom thereof.

This connection terminal 3L32 is electrically connected to the signal output end of the first microphone unit 11 and the input end of the electric recording device 15, as shown in FIG.

The microphone device 13 has an outer shape that can fit into the recess 30, and has a connection terminal 3 in the recess 30 at its lower end.
Connection terminal 35.36 that can be coupled to 1.32, with a second
A microphone unit 37, a transmitter 38, and a switch 39 are provided on the side.

As shown in FIG. 3, when the microphone device 13 is inserted into the recess 30, the second microphone 3
The sound receiving surface 40 of the microphone 7 is oriented in a direction opposite to the direction of the sound receiving surface 14 of the first microphone 11 .

This orientation can be achieved, for example, by providing a protrusion guide on the inner surface of the recess 30 and, in contrast, providing a groove on the side surface of the microphone device 13, so that the microphone device 13 is What is necessary is to make it impossible to fit into the recess 30.

a connection terminal 35 equipped on the microphone device 13;
36, second microphone unit 37, transmitter 38,
The switches 39 are connected in the relationship shown in FIG.

That is, the connection terminals 31 and 32 are connected to the switches X and Y of the switch 39, and the fixed terminals a and c of the switch 39
are connected to the output end of the transmitter 38, and fixed terminals S and d are connected to the output end of the second microphone unit 37, respectively.

Further, the input end of the transmitter 38 is connected to the output end of the second microphone unit 37.

The transmitter 38 frequency-modulates the output signal of the microphone unit 37 at a predetermined frequency, and connects the output signal to the connection terminal 35.36.
By connecting lead wires to these terminals 35 and 36, microphone signals are transmitted as FM radio waves using the lead wires as antennas.

If the carrier frequency of the yM radio wave is set to about 78MH2, it can be received by the radio receiver.

Next, the operation will be explained.

Operate the switch 39 of the microphone device 13 to switch the switch
, with Y connected to fixed terminals s and d,
If the terminals 35 and 36 are fitted into the recesses 30, the terminals 31 and 3
2 are interconnected, and the output end of the second microphone unit 37 and the first microphone unit 12 are both connected to the input end of the recording electric device.

In this state, if the operation button group 17 is used to set the tape recorder main body to 1 recording mode, the tape recorder magnetically records the signals from both the first microphone unit 11 and the second microphone unit 37.

In this recording state, the first microphone unit 12
Since the sound receiving surfaces 14 and 40 of the second microphone unit 37 face in opposite directions, it is possible to receive sound sources or reflected sounds in front and behind the tape recorder main body 12.

If the first and second microphone units 11.37 are non-directional, both microphone units can record sounds from approximately 360° directions.

Next, when the microphone device 13 is removed from the recess 30, only the first microphone unit 11 is removed from the recording electric device 1.
It is connected to the input end of 5 and records with the same function as a normal built-in microphone type cassette tape recorder.

In this case, the first microphone unit 11
has a strong sensitivity to the directionality of the sound receiving surface 14, and can record with slightly stronger directionality than when the microphone device 13 described above is attached.

Next, with the microphone device 13 removed from the recess 30, the switch 39 of the microphone device 13 is operated to connect the switches X and Y to the fixed terminal a.

C, the output of the second microphone unit 37 is sent to the transmitter 38 and sent into the air via terminals 35 and 36.

On the other hand, if the radio receiver in the tape recorder main body 12 is operated and the dial knob 21 is used to tune the receiving frequency to the transmitting radio wave frequency of the transmitter, the sound received by the second microphone unit 37 can be transmitted to the main body 12. It can be played from a speaker on the side.

Furthermore, if the tape recorder main body is set to 1 recording mode in this receiving state, it is possible to mix the received signal from the radio and the signal from the first microphone unit 11 for recording.

As a method for directly recording a radio reception signal, the method used in a tape recorder with a radio can be used as is, so a detailed explanation will be omitted here.

With the above, the first microphone unit 11 on the main body side
and a second microphone unit 37 located away from the main body, it is possible to simultaneously record sounds from different sound sources.

Of course, if a means for electrically isolating between the first microphone unit 11 and the electric recording device 15 is added, the signal received by the radio receiver (the signal from the second microphone unit or the signal from the broadcasting station only) can be removed. Can be recorded.

The functions of the tape recorder of the present invention can be summarized as follows.

1. Recording of signals from only the first microphone unit built into the tape recorder body.

2. Recording of signals from a first microphone unit built into the tape recorder body and a second microphone mounted in the opposite direction to the tape recorder body.

3. Recording of signals from the first microphone unit built into the tape recorder main body and the second microphone unit detached from the tape recorder main body.

4 Recording only radio reception signals.

As described above, the cassette tape recorder according to the present invention has the above-mentioned functions, so that, for example, when recording in a state where you can speak directly to Cheap Recorder (English conversation practice), all the sound sources around the tape recorder body are high-pitched. When you want to record at high sensitivity (table speech), when you want to record sound from two sound sources, one near the front of the tape recorder and the other from a distance, at high sensitivity (practice singing along with an instrument),
To obtain a highly mobile tape recorder that can be operated in various ways, such as when recording a radio broadcast program with one's own voice mixed therein.

In addition, conventional tape recorders with radios that are sold with a wireless microphone packaged together as an accessory have had trouble storing the wireless microphone, but the tape recorder of the present invention has a microphone device that can operate as a wireless microphone. Since it can always be attached to the tape recorder body, it is easy to store and the volume of the root capsule can be reduced.

[Brief explanation of drawings]

FIG. 1 is a front perspective view showing an embodiment of the cassette tape recorder according to the present invention, FIG. 2 is a rear perspective view of the same, and FIG. 3 is a side view showing the relationship between the first microphone unit and the second microphone unit. , FIG. 4 is a circuit configuration diagram showing the relationship between the first microphone unit and the second microphone unit. 10... Tape recorder housing, 11...
・First microphone unit, 12...Tape recorder main body, 13...Microphone device,
14...Sound receiving surface of first microphone unit, 30...Recess, 31.32...Plug, 35.36...Jack, 37.・・・・・・
- Second microphone unit, 3B... transmitter, 40... sound receiving surface of the second microphone unit.

Claims (1)

[Scope of utility model registration request] A first microphone unit whose sound receiving surface is fixed to a housing is directed toward the front of the housing, a connection terminal connected to a signal output end of the first microphone unit, and this connection terminal arranged inside. a recess formed in the surface of the housing, a terminal having an outer shape that can fit into the recess and coupled to the connection terminal, and a terminal connected to the terminal and having a sound receiving surface as the first A second microphone unit fixed in a direction opposite to the sound receiving surface of the microphone unit, and a transmitter connected through a switch between the output end of the second microphone and the connection terminal. A cassette tape recorder comprising a device.