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JPS57104682

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DESCRIPTION JPS57104682
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a main body of a
microphone according to an embodiment of the present invention, FIGS. 2 and 3 are side views
showing the same grip portion, and FIG. A side view showing a state in which the main body and
the grip portion of FIG. 2 are connected, FIG. 5 and FIG. 6 are circuit diagrams of the above main
body and FIG. 7 and FIG. DESCRIPTION OF SYMBOLS 1 иии Body и и и и и и и и и и и и и и и и и switching
knob 7, 14 и и и и и и и и и и и grip portion, 20.23 и и и и и и acoustic-electrical conversion element, 21 ......
changeover switch, 25 ...... output code, 26 ...... plug, 30 ...... wireless oscillation and modulation
circuit.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microphone,
wherein a first microphone body including an acoustic-electric conversion element which does
not require a power supply, and an acoustoelectric conversion factor which requires a power
supply are 8 old /// '. /? A plurality of microphones can be easily provided by providing two
types of microphone main bodies of the second microphone main body including 22 and one
grip unit incorporating a power source, and combining these main units with the grip unit in an
arbitrary combination It is something like that. When the conventional microphones are divided
by means for taking out the output, there are a usual one called a wired microphone taken out by
an output cord (cable) and a so-called wireless microphone taken out by radio waves. There are
also microphones that combine the two into one with both functions. This dual-function
microphone is convenient and convenient, but when it is used as a wireless microphone, the
output code must be removed, and even when it is used as a wired microphone, including
unnecessary wireless oscillation and modulation circuits It has to be carried around, and it has
the disadvantage that it tends to be increased in size by 9 in order to combine the functions of
both. The present invention solves the above-mentioned conventional drawbacks), and an
embodiment thereof will be described with reference to the drawings 5b3. FIG. 1 shows a
microphone main body 1, 2 a main body case, 3 a changeover switch control knob, and 4 a
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microphone head portion. In this head portion 4, an acoustic-electric conversion element-socalled microphone unit (not shown) Is housed. At the lower end of the main body case 2 are
provided a female screw 6 corresponding to a connection screw of the grip, which will be
described later, and a tongue-shaped contact 6 for transmitting an output signal (also a power
supply if necessary). FIG. 2 shows a grip 7 for wired connection, and one end of the grip case 8
has an external thread 9 corresponding to the internal thread 6 of the main body case 2 and an
output corresponding to the contact 6 of the main body ) Is transmitted. The other end of the
grip case 8 has an output cord 12 via a cord protector 11 and an outlet cap 13 at its tip. FIG. 3
shows a grip portion 14 for wireless connection, and one end of the grip case 14 has a female
screw portion 6. of the main body 1 as in FIG. Male thread 16 corresponding to the terminal 6, ")
7. It has a contact point 10 for transmitting power and output, and a transmitting antenna wire
18 via a cord protector 17 at the other end of the glyph "g5ts4 knob case 14".
The grip case 14 accommodates a wireless oscillation, modulation circuit and the like described
later. The main body 1 of FIG. 1 can be connected to any of the grip portion 7 of FIG. 2 and the
grip portion 14 of FIG. FIG. 4 shows a state in which the main body 1 of FIG. 1 and the grip part
7 for wired connection of FIG. 2 are combined, and both are integrated to form a single
microphone. 6 is a schematic diagram of the inside of the main unit 1 when the dynamic (moving
coil) type microphone unit is used as the built-in microphone unit in the main unit 1, 20 is a
dynamic type microphone unit, and 21.21 'is a knob of FIG. The interlock switch for switching
the output (and power supply) operated by 3; 22 is a capacitor for blocking DC; 6a is an output
terminal; 6b is a power terminal; and 6C is a common ground terminal. FIG. 6 is a connection
diagram in the main body 1 using an electret capacitor type micros) and a phone-unit 23, 85 / 624 are FETs (field effect type transistors), and 34 is a DC blocking capacitor. 7 is a schematic
diagram of a circuit adapted to the main body circuit of FIG. 6 mainly of the grip 7 for wired
connection of FIG. 2, 27 is a battery, 28 is an output load resistance, and 29 is a DC blocking
capacitor . 8 is a connection diagram in the wireless connection 7921 section 14 of FIG. 3, 3 o is
for wireless amplification 9 oscillation, modulation circuit, 31 is a signal input terminal from the
microphone unit, 32 is a power input terminal for the circuit 30 , 33 is a common ground
terminal. Among the above, components having the same function are denoted by the same
reference numerals and the description thereof is omitted. Next, the operation of the above
embodiment will be described. When the main body 1 of FIG. 1 and the grip portion 7 of FIG. 2
are connected, the male screw portion 9 of the grip portion 7 is the acid screw portion of the
main body 1 while connecting the contact 10 of the grip portion 7 to the contact 6 of the main
body 1 6 and screwed in to complete as shown in FIG. The same is true for the case where the
wireless connection greaser i and i of FIG. 3 are connected to the main unit 1. . If the grip circuit
of FIG. 8 is connected to the main circuit of FIG. 6, the output of the dynamic microphone unit 20
is the capacitor 22, the terminal 6a, and the terminal. 10a and a capacitor 29 are applied to the
signal input terminal of the wireless circuit 30, and similarly applied via a terminal 6c and a
terminal 10C to the common ground terminal 33, amplified and modulated in one circuit 30, and
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emitted from the antenna 18. Since one end of the battery 27 is connected to the power input
terminal 32 of the circuit 3o, the other end passes through the terminal 10b and the terminal 6b,
and from the fixed contact W or ? of the switch 21 'to the movable contact D', the terminal 6c,
the terminal 100.
The process is completed by the path of the terminal 33, and the power is supplied to the circuit
3o. The switch 21. 21 'is A non-conductive at the I position, short-circuited at the output short
circuit [0FFj state, B, W conductive at the W-position, short circuited "5 TAND B YJ state C". The
output short circuit condition is released at the C 'position, and the battery is in the "ONJ state" at
conduction. Next, when the path is connected to the main body circuit of FIG. 6 by the grip
portion of FIG. 7, at this time, the battery is unnecessary b9711 in operation but is blocked by
the capacitor 22 and shorted by the switch 21 It does not flow to the microphone unit 20 and
overheat. Although the resistor 28 enters the load side, there is no problem in practice if the
value is higher than the internal impedance of the microphone unit. Next, when the grip circuit of
FIG. 7 is connected to the main circuit of FIG. 6, the current of the battery 27 is the resistance 28,
the terminal 10a, the terminal 6a and the drain of the FET 24 when the switch 21 'is B' and C '.
24c, also the source 24b, D /, B '(or C /) terminal eb of the switch 21, and the terminal eb, the
terminal 10b flows to operate the FET 24. The output of the electret condenser microphone unit
23 is applied to the gate 24a of the FET 24, and the amplified output is generated at both ends of
the resistor 28 and led to the output cab 26 in the same way. Also when the grip unit circuit for
wireless connection of FIG. 8 is connected to the main circuit of FIG. 6, the operation 608 of the
FET is the same, and the output 608 of the microphone unit similarly amplified is the signal input
of the circuit 3o. It is added to the terminal 31, amplified and modulated, and emitted from the
antenna 18. As described above, in the microphone of this embodiment, both wired and wireless
output extraction methods are performed for grip replacement with respect to one main body,
and it is not necessary to always store both functions together at the time of use It can be small
and lightweight. In addition, since different power generation types can be exchanged for one
grip, subtle differences in tone due to differences in power generation types can be used
depending on applications, etc., resulting in high practical effects. The capacitor 29 and the
resistor 28 may be omitted as long as only the grip of FIG. 8 is connected to the main body of
FIG. Further, the connection between the main body 1 and the grip portion 7 or 14 can be a
method which can be easily attached and removed such as a so-called bayonet method used for
an interchangeable lens of a camera besides a screw method as illustrated. Therefore, not only
the projections and tongue-like contacts shown in the drawing but also a combination of
concentric metal rings and tongues, for example, may be used. Other easy and reliable electrical
contacts can be adopted.
When both contacts are metal cases, the common ground terminal may be shared by the case. In
addition, the antenna for wireless may not have to go out of the grip when it is not necessary
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because the wavelength of the radio wave is short or it is not necessary to make special
arrangements such as looping. In addition, although it is desirable to unify the length of a grip
part into the same dimension, there may be some magnitudes in the range which does not make
a difference in use. As described above, since the microphone body of the present invention can
appropriately select and connect microphone bodies of different power generation types to the
grip portion, it is possible to selectively use subtle differences in timbre due to differences in
power generation types depending on applications. Moreover, the function switching of the
microphone can be performed centrally by the changeover switch of the microphone main body,
and even if the grip portion incorporating the power supply is connected to the microphone main
body which does not require power supply, the microphone main body is not fed with electricity.
It is possible to prevent damage or the like of the 86.degree.
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