JPS5910865Y2 - microphone - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a microphone, which includes a first microphone body including an acousto-electric transducer that does not require a power source, and a second microphone body including an acousto-electric transducer that requires a power source. 1 with built-in microphone body and power supply
By providing two grip parts and connecting these main bodies to the grip part in arbitrary combinations, it is possible to easily provide a plurality of types of microphones.

Conventional microphones can be divided into two types based on the means by which the output is extracted: wired microphones, which output the output using an output cord (cable), and so-called wireless microphones, which output the output using radio waves.

There are also microphones that combine the two functions and have both functions.

Although this dual-function microphone is convenient and easy to use, the output cord must be removed when used as a wireless microphone, and even when used as a wired microphone, unnecessary wireless oscillation and modulation circuits are included. It had the disadvantage that it had to be carried around, and since it had both functions, it tended to be large in size and weight.

The present invention eliminates these conventional drawbacks,
Examples thereof will be described below with reference to the drawings.

Figure 1 shows the microphone main body 1, 2 is the main body case,
3 is the selector switch operation knob, 4 is the microphone head part,
This head portion 4 accommodates an acoustoelectric transducer, a so-called microphone unit (not shown).

The lower end of the main body case 2 is provided with a female screw portion 5 corresponding to a connection screw of a grip portion to be described later, and a tongue-shaped contact 6 for transmitting an output signal (and power source if necessary).

Figure 2 shows a grip part 7 for wired connection, with a male screw part 9 at one end of the grip case 8 corresponding to the female screw part 5 of the main body case 2, and an output (6) corresponding to the contact point of the main body.
It has a contact 10 for transmitting power (including power if necessary).

The other end of the grip case 8 has an output cord 12 via a cord protector 11, and an output plug 13 at its tip.

FIG. 3 shows a grip part 14 for wireless connection, and one end of the grip case 14 has a female screw part 5 of the main body 1 as shown in FIG.
, has a male screw 16 corresponding to the terminal 6 and a contact 10 for transmitting power and output.

A cord protector 17 is attached to the other end of the grip case 14.
It has a transmitting antenna line 18 via it.

The grip case 14 houses wireless oscillation, modulation circuits, etc., which will be described later.

The main body 1 in Fig. 1 can be connected to either the grip part 7 in Fig. 2 or the grip part 14 in Fig. 3. Fig. 4 is for the wired connection between the main body 1 in Fig. 1 and the grip part 14 in Fig. 2. It shows a state in which the grip part 7 of the
It is in the form of individual microphones.

FIG. 5 is a wiring diagram inside the main body 1 when a dynamic (moving coil) type microphone unit is used as the built-in microphone unit in the main body 1. 20 is a dynamic type microphone unit, 21. 21' is an interlocking switch for opening and closing the output (and power supply) operated by knob 3 in Figure 1, 22 is a capacitor for DC blocking, 6a is an output terminal, 6b is a power supply terminal, and 6C is a common ground terminal. be.

Figure 6 is a wiring diagram inside the main body 1 using the electret condenser type microphone unit 23, and 24 is a FET
(field effect transistor), 34 is a capacitor for blocking direct current.

FIG. 7 is a wiring diagram of the circuit of the wired connection grip part 7 of FIG. 2, which is mainly compatible with the main body circuit of FIG. 6.
7 is a battery, 28 is an output load resistor, and 29 is a DC blocking capacitor.

FIG. 8 is a wiring diagram inside the wireless connection grip part 14 of FIG. 3, and 30 is a wireless amplification, oscillation, and modulation circuit;
31 is a signal input terminal from the microphone unit, 32
is a power input terminal for the circuit 30, and 33 is a common ground terminal.

Among the above, those having the same functions are given the same numbers and the explanation is omitted.

Next, the operation of the above embodiment will be explained.

When connecting the main body 1 shown in FIG. 1 and the grip part 7 shown in FIG. When pushed in, it will be completed as shown in Figure 4.

The same applies to the case where the wireless connection grip 14 shown in FIG. 3 is connected to the main body 1.

To explain this using a circuit diagram, when the grip circuit shown in FIG. 8 is connected to the main circuit shown in FIG. is added to the signal input terminal of circuit 30, and similarly to terminal 6C.
, is applied to the common ground terminal 33 via the terminal 10C, is amplified and modulated by the circuit 30, and is emitted from the antenna 18.

One end of the battery 27 is connected to the power supply terminal 32 of the circuit 30, so the other end is connected to the terminal 10b, terminal 6b,
From fixed contact B' or C of switch 21' to movable contact D
'The circuit 30 is completed with a path of terminal 6C, terminal 10C, and terminal 33, and power is supplied to the circuit 30.

Switches 21 and 21' are in the A, A' position, where the battery is non-conducting, and when the output is short-circuited, the battery is in the "rOFF"state; 33, when the B' position is, the battery is conductive, and when the output is short-circuited, the battery is in the "rSTAND BY" state, c,
At position c', the output short-circuit condition is released, and the battery is turned on with continuity.
, becomes the state.

Next, if the grip section circuit shown in FIG. 7 is connected to the main body circuit shown in FIG. There is no such thing as running and overheating.

Although the resistor 28 is placed on the load side, there is no practical problem as long as the value is higher than the internal impedance of the microphone unit.

Next, when the grip circuit shown in Figure 7 is connected to the main circuit shown in Figure 6, when the switch 21' is in the B' and C' positions, the current from the battery 27 flows through the resistor 28, terminal 10a, terminal 6a, and F.
ET24(7) Drey', /24C, also source 24
b, D', B' (or C') of the switch 21 flows through the path of the terminal 6b and the terminal 10b to operate the FET 24.

Electret condenser microphone unit 23
The output of FET 24 is applied to gate 24a of FET 24, where the amplified output is developed across resistor 28 and led to output plug 26 along a similar path.

When the grip section circuit for wireless connection shown in FIG. 8 is connected to the main circuit shown in FIG. Modulated antenna 18
is fired from.

As mentioned above, the microphone of this embodiment has both wired and wireless output output methods for one main body by replacing the grip, and there is no need to keep both functions in one at all times. It can be made small and lightweight.

In addition, since you can replace the main body with a different power generation type for one grip, you can use the subtle differences in tone due to the difference in power generation type depending on the purpose, which is highly effective in practical use.

If the combination is such that only the grip part shown in Fig. 8 is connected to the main body shown in Fig. 5, the capacitor 29 and the resistor 28
may be omitted.

The main body 1 and the grip portion 7 or 14 may be connected to each other by a screw method as shown in the example, or by a method that allows for easy attachment and removal, such as the so-called bayonet method used in interchangeable lenses of cameras.

The contacts for transmitting both outputs (and power if necessary) are not limited to the protrusion and tongue-shaped contacts as shown, but may also be a combination of concentric metal rings and tongues, or other types of connections that can be easily and securely connected. Electrical contacts that can be used can be used.

If both contacts have a metal case, the common ground terminal may also be used by the case.

Also, wireless antennas have short radio wave wavelengths.
If it is not necessary because it is specially designed to be looped, it does not need to be extended outside the grip.

Although it is desirable that the length of the grip portion be the same, it may be slightly different in length as long as it is not avoided in use.

As explained above, in the microphone of the present invention, microphone bodies with different power generation formats can be selected and connected to the grip portion as appropriate, so subtle differences in tone due to differences in power generation format can be used depending on the application.

What's more, the microphone's functions can be changed centrally using the changeover switch on the microphone itself, and even if a grip section with a built-in power supply is connected to the microphone itself, which does not require a power supply, no power is supplied to the microphone itself, and the acoustic-to-electrical conversion element is used. damage etc. can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the main body of a microphone according to an embodiment of the present invention, Figs. 2 and 3 are side views showing the grip section, and Fig. 4 shows the main body of Fig. 1 and the grip shown in Fig. 2. 5 and 6 are circuit diagrams of the main body, and FIGS. 7 and 8 are circuit diagrams of the grip portion. 1...Body, 3...Switching knob, 7,
14...Grip part, 20, 23...
・Acoustic-electrical conversion element, 21, 21'... Changeover switch, 25... Output cord, 26...
...Plug, 30...Wireless oscillation/modulation circuit.

Claims (1)

[Scope of utility model registration request] A first microphone body that includes an acoustic-electric conversion element and a changeover switch that does not require a power source, a second microphone body that includes an acoustic-electricity conversion element and a changeover switch that require a power source, and a grip section that has a built-in power source. When the grip section and the microphone body are connected in combination, the switch on the microphone body controls the on/off of the built-in power supply in the grip section, and when the switch is turned on, the electrical circuit in the grip section is turned on. A microphone configured to supply power and, when a second microphone body is connected, also supply power to its acoustic-to-electrical conversion element.