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DESCRIPTION JPS5916493
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
microphone suitable as a built-in microphone of an electric device such as a micro power
recorder, a television camera and the like. In general, when superdirectivity is realized by a highorder sound pressure gradient microphone as a built-in microphone in an electric apparatus such
as a microcassette tape recorder or a television camera, a large number of microphone units and
their microphone units There is a need for an electric circuit for processing the output signal
from the output signal, and it has been difficult to reduce the size and weight. FIG. 1 (t shows a
conventional secondary sound pressure gradient type microphone. In FIG. 1, the unidirectional
microphone unit 1 ° 2 is fixed in the punching metal 3 at a predetermined distance and
supported via the anti-vibration rubbers 4 and 5 provided on both ends of the punching metal
30. The mounts γ, 8 provided on the body 6 are floated (−J 3), and the support 6 is mounted in
the microphone case 9. On the other hand, in the second microphone case 9, an electric circuit
10 for processing output signals from the unidirectional microphone units 1 and 2 is attached.
However, in the above-described secondary sound pressure gradient type microphone, the
microphone circuit 1.2) is fixed to the punching metal 3, and the punching metal 3 is supported
by the anti-vibration rubbers 4, 6 and the mounting brackets 7, 8. Since the supporting body 6
must be housed in the case 9, the mounting structure of the microphone case 1.2 is complicated,
and a space for housing the electric circuit 10 is separately required in the case 9 Because of
this, there is a drawback that the physical size is increased. SUMMARY OF THE INVENTION It is
an object of the present invention to provide a compact, lightweight and easy-to-assemble
microphone that enables integration of a microphone unit and an electric circuit. In the
microphone of the present invention, a microphone unit insertion hole is provided in a part of a
flexible printed circuit board having a microphone circuit i1 structure, and the printed circuit
board and the microphone unit inserted in the microphone unit insertion hole are vibration proof
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rubber Integrated in the According to this configuration, the microphone unit and the electric
circuit thereof can be integrated, so that the weight and size can be reduced, and the printed
circuit board constituting the microphone circuit and the microphone unit are integrally made of
vibration-proof rubber. Has the advantage of being easy to assemble.
Description of the Embodiments Hereinafter, embodiments of the present invention will be
described. FIG. 2 shows an embodiment of the microphone according to the present invention. In
FIG. 2, 11.12 is a unidirectional microphone unit, and 13 is an output from the unidirectional
microphone case l-11, 12. The flexible printed circuit board which constitutes the electric circuit
which processes the signal, 14.15 is the anti-vibration effect for integrating the il ′ L-directional
microphone unit 11.12 and the printed circuit board 13 (! iii) The anti-vibration rubber 16 is a
microphone case for accommodating the unidirectional microphone units 7-11 and 12 integrated
with the anti-vibration rubber 14.15 and the printed circuit board 13. Here, as shown in FIG. 5,
the printed circuit board 13 is flexible (water / water-like, and has insertion holes 17, 184 for
mounting the microphone units 11 and 12). It has an electric circuit composed of circuit
elements 19 such as a chip resistor, a chip resistor, and a chip semiconductor on its surface. Also,
the above-mentioned vibration-proof rubber 14.16 is ring-shaped as shown in FIG. The
unidirectional microphone case 11.12 is inserted into the insertion hole 17.18 provided in the
printed circuit board 13 and electrically connected to the input end (not shown) of the electric
circuit formed on the printed circuit board 13. Connecting and fitting the vibration-proof rubber
14.15 onto the bent printed circuit board 13 in a state where the printed circuit board 13 is bent
so as to surround the outer periphery of the single directional micro bonding unit 11.12. Thus,
the elastic rubber 14.15 is integrated with the printed circuit board 13 with its elasticity. Then,
the unidirectional microphone unit 11.12 and the printed circuit board 13 integrated by the
above-mentioned vibration-proof rubber 14.15 are accommodated in the case 16 divided into
two, and both ends of the case 16 divided into two are screwed etc. The anti-vibration rubber
14.15 is held down by the microphone case 16 by means of fixing by means of the abovementioned, and the single-directional microphone Uninot 11.12,. It is supposed to The unidirectional microphone unit 11, 12, 126, I The above-mentioned printed circuit board 13 is
provided with a predetermined distance 4 defined by the insertion holes 17, 18 with fingers, one
phrase axis is in the front direction The secondary sound pressure gradient type microphone is
configured by turning on and off] + :) i +.
As described above, according to the present invention, the microphone board insertion hole is
provided in a part of the flexible printed circuit board constituting the microphone circuit, and
the above-mentioned printed circuit board and the microphone inserted in the microphone unit
insertion hole Since the unit is integrated with the anti-vibration rubber having the surface
vibration effect, it has the advantage of being easy to assemble and capable of reducing the size
and weight. In addition, since the anti-vibration rubber exerts a shaking effect with the storage
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case, there is an advantage that the support structure of the microphone unit itself can be
simplified.
[0002]
Brief description of the drawings
[0003]
1 is a block diagram of a conventional microphone, FIG. 2 is a block diagram showing one
embodiment of the microphone of the present invention, FIG. 3 is a perspective view of the main
part of the same microphone, FIG. 4 is a side view thereof FIG. 5 is a configuration perspective
view of a printed circuit board of the same microphone, and FIG. 6 is a configuration perspective
view of anti-vibration rubber of the same microphone.
11.12 ··· Microphone unit, 13 ··· Glint board, 14.16 · · · · Anti-vibration rubber, 17 ° 18 · · ·
Insertion hole. Name of Agent Attorney Nakao Toshio Other 1 person Figure 1 Figure 2 Figure 3!
? 55'3-Figure 5
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