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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural perspective view of a conventional
full screen mask, FIG. 2 is an exploded perspective view of an essential part showing one
embodiment of the present invention, and FIG. 3 aeb is a sectional view and a plan view of a
loudspeaker. It is. E, q part, P source, E · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · battery 1'4 · · · · · · · case cover plate, 15 · · ·・ ・ ・ ・ ・ ・
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ The operation knob. Ji 1-223-Japanese Utility Model
Application No. 51-141800 (2) revolt (cL) (Di 2-224-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an all-over mask,
and more particularly to an all-around respirator for radiation protection. Workers are required
to wear protective clothing to prevent contamination by radiation when inspecting and
maintaining equipment within a radioactively contaminated environment such as a nuclear
power plant. By the way, in this case, it is naturally impossible for the workers to communicate
with each other, which causes a safety problem in operation. Therefore, it is essential to adopt
some means of communication, but in this case 1-the air tightness of the anti-screen is not
disturbed by the feeding by the means of communication 1 the communication device is simple
and lightweight 1 radiation after work It is necessary to provide conditions such as the function
of the communication device not to be disturbed by washing with water for decontamination. For
this reason, the exhaust hole of the entire surface mask (1) for covering the head, for example,
the full surface mask + 11 provided with the window (2) and the air intake hole (3) 1 exhaust
hole (4) incorporating a filter as shown in FIG. A voice transmission plate (5) made of a thin film
is provided on the top of (4) so as to maintain air tightness, and the vibration of air inside the
mask due to the voice is externally transmitted through the voice transmission plate (5). A means
to communicate as air vibration is used. This transmission plate has advantages such as simple
structure and light weight, and sufficient airtightness, and that the function is not damaged in
decontamination. However, because the transmission efficiency is low, it is necessary to make a
loud voice, and it works normally for relatively weak vibrations, but it has the drawback that it
can not accurately transmit vibrations due to the occurrence of a weak sound. doing. Therefore,
there is a drawback that the clarity of the call is disturbed and good call communication can not
be performed, which is a major obstacle to practical use. The object of the present invention is to
provide an overall mask which eliminates the above-mentioned drawbacks, which will be
described in detail with reference to the drawings. Fig. 2 is a perspective view of an essential part
showing one embodiment of the present invention (the same reference numerals as in Fig. 1
indicate the same parts), and Fig. 8 alfbl is a sectional view and a plan view showing an example
of a loudspeaker. In the present invention, as shown in FIG. 2, an electric loudspeaker having a
female screw portion (6) on the outer side of a mask (5 mounted on a mask) and a male screw
portion (7) on the mask as shown in FIG. Device (8), for example, as shown in FIG. 8, a male
screw portion (7) integrally provided at the center of the bottom plate (91) of the case (9), so that
the front surface of the receiving-receptive is exposed at its center Having a plurality of
microphones Q (1, non-correction, the amplifier output fill of the microphone output built in the
f-case (9), the speaker 0, the battery 03, and the slit for nasal passage (.about.t, L.sub.141) The
cover plate α of the case and the power supply switch (11 and the loudspeaker system with the
microphone Q · spaced from the voice transmission plate (5) at appropriate intervals are
provided so that the operation knob (151) is exposed at the center The female, male screw + 61 +
71 k as shown In which it was to be screwed to have.
As described above, when the loudspeaker is fully screwed to the front surface of the voice
transmission plate, the air vibration generated by the voice transmission plate is converted into
an electric signal by the microphone and then amplified and emitted by the speaker. Therefore, it
is possible to communicate sufficiently by producing an unnatural utterance that does not
produce a vignette, and of course, after one operation, the loudspeaker can be easily removed at
a predetermined place to carry out all the decontamination of radiation) and start the operation It
is possible to easily wear a stored loudspeaker system. For this reason, no consideration is
required so that the function of the loudspeaker is not disturbed at the time of decontamination
of the radioactivity, so that decontamination can be carried out simply and sufficiently. The air
tightness of the mask is maintained by the mounting structure, so there is no danger of
contamination by radiation, and it can be easily removed and used like a conventional mask
when a loudspeaker is not required. There is an advantage that can be done. The proposal can be
applied to all masks other than those for radiation protection. As is apparent from the above
description, according to the present invention, a decontamination easy-to-clean full-face mask
can be obtained which enables good communication and communication safety even when using
the full-face mask. The practical effects are quite large.
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