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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a microphone speaker, FIG.
2 is a front view of the microphone and its fixed frame, and FIGS. 3 to 4 are characteristic curve
diagrams. 1
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/ 1 to 1 ? 7 and 7-+ 'N 1-N- One-on-one one-one '/ \ ,, one-one-one I / BVX / Be one / \ no / /
one / \ two five five 700 ? 2 ? y 5 hori taOoo 2 ? # 0 one one one one one one-one- ??
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker
microphone in which a speaker and a microphone are integrated. The purpose of the present
invention is to explain the complexity of the structure of the conventional speaker microphone
and the complexity of operation. It is an object of the present invention to provide a speaker
microphone in which the shape is miniaturized while solving the defects. There are a wide variety
of types of speaker microphones conventionally used for audio equipment such as tape
recorders, interphones, transceivers, etc., but broadly speaking, the type of speaker microphone
and (1) speaker and microphone are separately juxtaposed The former is divided into one, and
the former can be further divided into one in which the mechanisms of the speaker and the
microphone are integrally configured as one unit, and the other in which the speaker and the
microphone are combined by the unit having the same structure. However, they have the
disadvantages of operation and installation inconvenience as described in the following j. In the
former, the speaker and the microphone are basically the same in structure but excellent In order
to obtain different characteristics, the speaker requires mass control, and the microphone
requires resistance control. It is necessary to adopt mutually contradictory control methods.
Therefore, in the case where the same unit is used for both, the control method has to be
switched each time, and the operation is complicated. The differences between the characteristics
when the speaker is used as a microphone and when the microphone is used as a speaker are as
shown in the graph 6 of FIGS. 3 and 4. Both figures show the response characteristics, but FIG. 3
shows that when the speaker having the characteristics like b is used as the microphone, the
characteristics like the six curves are obtained. In FIG. 4, conversely to the above, when the
microphone of A characteristic is also used as a speaker as it is, the characteristic 1 as shown by
B is obtained, and the characteristic as a speaker is deteriorated up to a certain frequency. In
addition to the above-mentioned disadvantages, the former has a disadvantage that the structure
becomes complicated in any form. In the latter method in which the speaker and the microphone
are separately juxtaposed, there is no problem in the characteristics but there is a drawback that
the 11 installation places become wide. The present invention solves these drawbacks. Therefore,
when one embodiment of the present invention will be described with reference to the drawings,
as shown in the sectional view of FIG. 1 and the front view of the microphone of FIG. The speaker
comprises the outside by a yoke 2 and a speaker frame 3, and a coil 6 is insulatingly mounted on
the outer periphery of the tip of the magnet 5 at the center of the yoke 2 via a center ring 4. The
rear end of the speaker diaphragm 8 concentrically mounted on the speaker frame 3 is fixed in
front of the magnet 5.
9 is a small condenser microphone or a semiconductor microphone (for example, an electleft
microphone incorporating an IC) having no magnetic circuit, attached to the center of the front
of the speaker 1 via a fixed frame 1 ░ so as not to harm the speaker characteristics And the
speaker 1 and C are integrally assembled. The method of fixing the speaker and the microphone
during assembly and the material of each part can be any method and material as long as the
characteristics of the microphone and the speaker are not impaired. 11 is a microphone lead
wire. Since the present invention separately provides a small, high-performance microphone in
the center of the front of the speaker as described above, and does not adversely affect the
characteristics of both, it is desirable to use a microphone and a speaker control system in use.
There is no need to switch, the structure and structure are simple, the overall size can be
reduced, and there are many practical benefits in terms of manufacturing cost as well as use.
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