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DESCRIPTION JP2016092630

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DESCRIPTION JP2016092630
Abstract: A protective mask that makes it easy to attach and detach a microphone. A microphone
(41) in a protective mask (1) is located in a space (50) formed by a base member (21) and a
housing forming member (22). Extending from the microphone (41) is a case (42) formed of a
rigid material that does not deform. The case portion (42) is held between the base member (21)
and the housing forming member (22) which can be separated from each other through a gasket
(43) formed of an elastically deformable soft material. [Selected figure] Figure 2
Protective mask
[0001]
The present invention relates to a protective mask on which a microphone and a microphone are
attached.
[0002]
BACKGROUND OF THE INVENTION Protective masks using a microphone and a microphone
having a diaphragm for sound transmission are known in the prior art.
[0003]
For example, in the sound transmission device for a respiratory protection mask described in
Japanese Patent Application Laid-Open No. 60-158796 (PTL 1), the movable portion of the
electroacoustic transducer is for the sound transmission diaphragm attached to the protective
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mask, It is directly coupled to the voice transmitting diaphragm.
An example of an electroacoustic transducer is a dynamic microphone, whose conversion
diaphragm is directly coupled to the voice diaphragm from the outside of the protective mask.
[0004]
Further, in the sound transmission method of the protective surface mask described in Japanese
Patent Laid-Open No. 4-504346 (Patent Document 2), a microphone device amplifier assembly is
attached to a voice generation passage of the protective surface mask.
The microphone device amplifier assembly includes a microphone, an amplification base, a
speaker, a battery, and an electrical circuit connecting them.
[0005]
Japanese Patent Application Laid-Open No. 60-158796 Japanese Patent Application Laid-Open
No. 4-504346
[0006]
In these conventional protective masks, those in which the microphone conversion diaphragm is
directly coupled to the voice diaphragm can not be applied to a protective mask in which both
sides of the voice diaphragm are protected by caps.
Also, if the microphone is attached directly to the base wall forming a void to accommodate it, it
is not possible to remove the microphone alone from the protective mask when the microphone
is not needed.
[0007]
The problem to be solved by the present invention is to provide a protective mask that is
improved to make it easy to attach and detach a microphone.
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[0008]
In order to solve the above problems, the present invention is directed to a transmitter including
a voice transmitting diaphragm located in front of the face, and a microphone for converting the
sound from the transmitter into an electric signal. It is a protective mask attached.
[0009]
The features of the present invention are as follows.
The diaphragm is attached to a base member incorporated in the protective mask, and the base
member is integrated with a housing forming member that detachably abuts on the base member
so as to surround the voice transmitter. It forms a space in which the microphone can be
positioned forward.
From the microphone located in the space, a case portion integral with the microphone extends
between the base member and the housing forming member to the outside of the space. The base
member, the housing forming member, and the case portion are formed of a hard material that
does not deform. The microphone is fixed in the space by holding the case portion between the
base member and the housing forming member via a gasket formed of an elastically deformable
soft material.
[0010]
In the protective mask according to the present invention in which the microphone is positioned
in the space formed by the base member to which the transmitter is attached and the housing
forming member in contact with the base member, the microphone can be separated from the
transmitter. Even though the microphone has protective caps on both sides, the microphone can
be attached. The microphone is held between the base member and the housing member which
are separable from each other in the protective mask through the gasket formed of the elastically
deformable soft material and the case portion formed of the rigid material which does not
deform. Therefore, the position of the microphone in space is fixed, and the vibration generated
in each part of the protective mask can be prevented from being transmitted to the microphone.
The protective mask to which the microphone is so attached is easy to attach and remove the
microphone.
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[0011]
The drawings illustrate certain embodiments of the present invention according to the present
disclosure and include not only the essential features of the invention, but also optional and
preferred embodiments. The perspective view of a protection mask. Vertical cross-sectional view
of a protective mask. III-III arrow line view of the protective mask of FIG. IV-IV arrow line view of
the protective mask of FIG. The same figure as FIG. 2 which shows an example of an embodiment.
VI-VI line arrow line view in FIG. VII-VII arrow line view in FIG.
[0012]
The details of the protective mask according to the present invention will be described below
with reference to the accompanying drawings.
[0013]
FIG. 1 is a perspective view of a full-face type protective mask 1 which is an example of a
protective mask.
Double-headed arrows A, B, and C in the figure indicate the vertical direction, width direction,
and front-rear direction of the air suction and discharge unit 20 described later in the protective
mask 1. However, in the following description, the vertical direction may be referred to as the
vertical direction, and the width direction may be referred to as the horizontal direction.
Protective mask 1 has face 10 capable of covering at least the mouth and nostrils of a wearer
(not shown), and filter medium unit 7 for filtering outside air can be removably attached to face
10. . The face body 10 has an eyepiece 2, a face-contacting pad 3 attached to the peripheral edge
of the eyepiece 2 via a frame member 5, a nose cup 4 positioned inside the eyepiece 2, and the
like. The eyepiece 2 in the illustrated example is symmetrical and formed of a transparent hard
plastic material such as polycarbonate resin or inorganic glass, and the facing pad 3 is formed of
a soft elastic material such as silicone rubber or urethane rubber. Is made of a hard plastic
material such as ABS resin or nylon resin. The nose cup 4 is formed of a soft and elastic material
similar to the facing pad 3. A strap (not shown) for hanging around the head of the wearer can be
attached to the portion 6 of the facing pad 3. The nose cup 4 is formed to be able to cover the
wearer's mouth and nostrils inside the face body 10, and includes a pair of left and right first
intake valves 4a and a ring-shaped member 4b for attaching the first intake valve 4a. Have. In the
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face piece 10, the suction / exhaust unit 20 is attached to the facing pad 3 using a belt 16. In the
present invention, it is not essential that the eyepiece 2 be symmetrical.
[0014]
The air suction and discharge unit 20 has a base member 21 which forms the rear part and is
attached to the facing pad 3 and a housing forming member 22 which is assembled from the
front to the base member 21. The housing forming member 22 is detachably attached to the base
member 21 via the locking slider 22a. From between the base member 21 and the housing
forming member 22, a case portion 42 extending from a microphone 41 described later located
inside the air suction and discharge unit 20 extends. The case unit 42 accommodates either a
component (not shown) such as a converter in the microphone 41 and the output cord 41a
extending from the member, and the case where the output cord 41a is accommodated in the
figure The thing of is shown. The case portion 42 is formed of a hard material which does not
elastically or inelastically deform when the mask 1 is handled or worn, for example, a hard
plastic material such as ABS resin or a metal material, and It has the preferred thickness and
cross-sectional shape to prevent. The case portion 42 is sandwiched by the peripheral portion of
the base member 21 and the peripheral portion of the housing forming member 22 via a gasket
43 formed of an elastic material such as silicone rubber. A through hole 26 for taking in air is
formed in the front part of the housing forming member 22.
[0015]
FIG. 2 is a cross-sectional view of the mask 1 in the up-down direction A along the center line IIII, which bisects the dimension in the width direction B of the eyepiece 2 and the air suction and
discharge unit 20 in FIG. The base member 21 in the air suction and discharge unit 20 is formed
of a hard material which does not deform in handling or wearing of the protective mask 1, for
example, a hard plastic material such as ABS resin, and a front opening formed on the facecontacting pad 3 It is in pressure contact with the inner peripheral surface of the portion 3a so
as to be airtight. The base member 21 is provided with a speaker 23 commonly used in the art in
the central part in the vertical direction A. The voice transmitter 23 has a voice transmission
diaphragm 24 and a cap 25 formed of a porous plate which is on both sides in the front-rear
direction C of the diaphragm 24 and protects the diaphragm 24. The sound emitted by the
wearer can be transmitted to a third party by vibrating the diaphragm 24. The base member 21
also has an intake passage 27 in the upper part, and a second intake valve 28 that can be opened
toward the inside of the face 10 is attached to the rear end of the intake passage 27. An exhaust
hole 21 b is formed in the lower portion of the base member 21, and an exhaust valve 29 which
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can be opened toward the outside of the flat body 10 is attached to the exhaust hole 21 b.
[0016]
The housing forming member 22 is also formed of a hard material which does not deform in
handling or wearing of the protective mask 1, for example, a hard plastic material such as ABS
resin, and has an air supply passage 31 in the upper portion 30a. In the air supply passage 31,
the front portion 31 a is connected to the through hole 26 formed in the front surface portion of
the housing forming member 22, and the rear portion 31 b enters the air intake passage 27 of
the base member 21 in a retractable manner. The outer peripheral surface of the rear portion 31
b is in pressure contact with the inner peripheral surface of the intake passage 27 through an
elastic gasket (not shown) so as to be airtight.
[0017]
A sensor 32 for detecting the opening degree of the exhaust valve 29 is attached to the lower
portion 30 b of the housing forming member 22 at a position facing the exhaust valve 29. At the
lowermost portion of the housing forming member 22, an engagement hole 34 for advancing the
hook portion 33 of the base member 21 is formed. The hook portion 33 engages with the
circumferential surface of the engagement hole 34, whereby the lower portion 30b of the
housing forming member 22 is integrated with the base member 21 in a detachable manner.
From the engagement hole 34, the exhalation having exited the exhaust hole 21b flows out as
indicated by the arrow y.
[0018]
An intermediate portion 30c in the vertical direction A of the housing forming member 22 has a
front surface portion 36 in which the through hole 26 is formed, and a rear surface portion 37
spaced apart and opposed to the transmitter 23. In the front-rear direction C of the housing
forming member 22, a front space 39 for housing the electric fan 38 for intake is formed
between the front surface portion 36 and the rear surface portion 37. The front space 39 is
connected to the outside of the protective mask 1 through the through hole 26 and the filter
medium unit 7 (see FIG. 1), and is also connected to the air supply passage 31 formed in the
upper portion 30a. The motor fan 38 is attached to the motor 38 a and is attached to the rear
surface portion 37. The electric fan 38 is also electrically connected to an external power supply
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(not shown) carried by the mask wearer or a battery (not shown) built in the protective mask 1
and incorporated in the sensor 32. The rotational state is controlled based on a signal from a
control circuit (not shown). When the electric fan 38 rotates, outside air filtered by passing
through the filter medium unit 7 enters the forward space 39 from the through hole 26.
Thereafter, the outside air passes through the air supply passage 31 and the intake passage 27
as indicated by the arrow Y, opens the second intake valve 28, and proceeds to the inside of the
eyepiece 2. Outside air further opens the first intake valve 4a to enter the inside of the nose cup
4 and is used as an intake by the wearer. The wearer's exhalation flows as shown by the arrow y,
opens the exhaust valve 29, and goes out of the exhaust hole 21b, and then is formed between
the engagement hole 34 or the base member 21 and the housing forming member 22. Out of the
air intake and exhaust unit 20 through a gap (not shown).
[0019]
The rear surface portion 37 of the housing forming member 22 is integrated with the base
member 21 by coming into contact with a portion of the base member 21 which is positioned
around the transmitter 23 so as to surround the transmitter 23. Form a space 40 for storing the
In the space 40, the microphone assembly 45 including the microphone 41 is located in front of
the transmitter 23, and is housed in a manner to be separated from the transmitter 23. As
apparent from FIG. 1 and FIG. 4 together with reference to FIG. 4, the microphone assembly 45
includes at least the microphone 41 and the case portion 42 of the microphone 41, the output
cord 41 a extending from the microphone 41, and the case portion 42. And. The microphone 41
may be separately attached to the tip of the case 42 or may be formed by incorporating a
component such as a converter at the tip of the case 42. In any case, the microphone 41 can be
regarded as being integrated with the case portion 42 at the tip end portion of the case portion
42. The output cord 41a may be accommodated in such a case 42 extending from the
microphone 41 (see FIG. 1). The position of the microphone 41 is fixed in the space 40 by the
case portion 42 being held between the peripheral portion of the base member 21 and the
peripheral portion of the housing forming member 22 via the gasket 43.
[0020]
The microphone 41 converts the voice from the transmitter 23 into an electrical signal and
outputs the electrical signal through the output code 41a, and the signal is reproduced as voice
by a speaker (not shown) connected to the microphone 41 by wire or wirelessly. .
[0021]
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FIG. 3 is a view on arrow III-III in FIG.
The III-III line is a line that separates the base member 21 and the housing forming member 22
in the front-rear direction C in the air suction and discharge unit 20, and the front surface
portion of the base member 21 is visible in FIG. In order to separate the base member 21 and the
housing forming member 22, the slider 22a is slid downward as indicated by the arrow P in FIG.
1 to engage the base member 21 and the housing forming member 22 via the slider 22a. solve.
Next, the portion of the air supply passage 31 of the housing forming member 22 is withdrawn
from the intake passage 27 of the base member 21 and at the same time, the engagement hole
34 and the base formed in the lowermost portion of the housing forming member 22 The
engagement with the hook portion 33 of the member 21 may be released. In addition, in FIG. 3,
illustration of eyepiece 2 grade | etc., Located in the back of the base member 21 in FIG. 2 is
abbreviate | omitted. In the base member 21 of FIG. 3, the intake passage 27 is visible in the
upper part. The second intake valve 28 is in contact with the plurality of pillars 27 a extending
vertically in the intake passage 27 so as to be able to open and close from the inside of the mask
1. In the middle part in the up and down direction A, the cap 25 of the transmitter 23 is visible.
An exhaust valve 29 is visible in the lower part.
[0022]
FIG. 4 is a view taken along line IV-IV in FIG. The IV-IV line is a line coinciding with III-III in FIG.
2, but the arrow IV points forward. In FIG. 4, the whole including the back surface part 37 of the
housing formation member 22 is visible. Also in FIG. 4, the microphone assembly 45 and the
gasket 43 are shown in phantom. An air supply passage 31 is formed in the upper portion 30 a
of the housing forming member 22. The sensor 32 is visible in the lower part 30b. The rear
surface portion 37 is visible in the middle portion 30c. The gasket 43 extends from the inside to
the outside of the housing forming member 22 through a recessed portion 56 (see FIG. 1) formed
in the peripheral portion of the housing forming member 22. The case portion 42 extending from
the microphone 41 is covered with a gasket 43 at a portion extending from the housing forming
member 22 and the vicinity thereof. The gasket 43 is in pressure contact with the peripheral
portion of the base member 21 and the peripheral portion of the housing forming member 22 so
that the vibration of the intake and exhaust unit 20 due to the rotation of the electric fan 38 and
the motor 38a is transmitted to the microphone 41 through the case portion 42. You can prevent
that. In addition, external noise can be prevented from intruding from the recessed portion 56.
For example, if the protective mask 1 is worn at a fire site where vehicles such as fire engines
come and go and helicopters for fire fighting activities come in, noise can be prevented from
being transmitted to the microphone, and the voice emitted by the wearer Can be transmitted to
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a third party in a clear manner via the microphone 41. The wearer includes a pilot of a helicopter
as well as a firefighter. The microphone assembly 45 and the gasket 43 can be freely attached to
and detached from the housing forming member 22.
[0023]
Although it is preferable to wear the mask 1 of the illustrated example in a state in which the
electric fan 38 can rotate, a state in which the electric fan 38 does not rotate or the electric fan
38 and the motor 38a are attached It is also possible to use it in an unoccupied state.
[0024]
FIG. 5 is a view similar to FIG. 2 showing another example of the embodiment of the present
invention.
A tubular member 50 for covering at least the microphone 41 of the microphone assembly 45 is
incorporated in a space 40 formed by the base member 21 and the housing forming member 22
in FIG. 5. The cylindrical member 50 is made of an elastically deformable soft material such as
silicone rubber, and is a front portion 51 located in front of the microphone 41 and in pressure
contact with the rear surface portion 37 of the housing forming member 22; A peripheral portion
52 behind the microphone assembly 45 and in pressure contact with the base member 21
around the transmitter 23 so as to surround the transmitter 23, and an opening 53 defined by
the peripheral portion 52; Have. The tubular member 50 does not move in the space 40 by being
in pressure contact with the rear surface portion 37 of the housing forming member 22 and the
base member 21 in this manner. In the preferred cylindrical member 50, as is apparent from FIG.
7, a gasket 43 (see FIG. 7) is interposed between the peripheral portion of the base member 21
and the peripheral portion of the housing forming member 22 while covering a part of the case
portion 42. 1) is formed integrally with the cylindrical member 50. In the preferred microphone
assembly 45, at least the microphone 41 is not in contact with the inner surface of the cylindrical
member 50, while the case portion 42 is sandwiched between the base member 21 and the
housing forming member 22 via the gasket 43. As a result, the position of the microphone 41 in
the space 40, more specifically, the position of the microphone 41 inside the cylindrical member
50 is fixed. However, in the present invention, the tubular member 50 and the gasket 43 can be
separately formed. In addition, the inner surface of the cylindrical member 50 can be brought
into contact with the microphone 41 so that the inner surface can support the microphone 41.
[0025]
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The cylindrical member 50, which is formed of an elastically deformable soft material and is in
pressure contact with the base member 21 and the housing forming member 22, transmits the
rotational sound of the electric fan 38 and the motor 38a attached thereto to the microphone 41.
It is possible to prevent the generation of noise due to the vibration by absorbing the vibration of
the rear surface portion 37 etc. which may be generated by the rotation of the electric fan 38
and the motor while exhibiting the sound insulation effect to prevent the noise. The cylindrical
member 50 can also prevent noise outside the mask 1 from being transmitted to the microphone
41. The outer surface of the bottom portion 51 of the cylindrical member 50 and the rear surface
portion 37 of the housing forming member 22 in which the outer surface is in pressure contact
can be formed flat as in the illustrated example. It can also be formed to have The bottom portion
51 and the rear surface portion 37 can also be fitted to each other in the concave portion and the
convex portion.
[0026]
6 is a view taken along the line VI-VI in FIG. The VI-VI line is a line that separates the base
member 21 and the housing forming member 22 in the front-rear direction C in the air suction
and discharge unit 20 of FIG. 5, and FIG. 6 shows the base member 21 having the same shape as
FIG. You can see the front part of the
[0027]
7 is a view on arrow VII-VII in FIG. The VII-VII line is a line corresponding to VI-VI in FIG. 5, but
the arrow VII points forward. In FIG. 7, the whole including the back surface part 37 of the
housing formation member 22 is visible. In FIG. 7 also, the microphone assembly 45 and the
cylindrical member 50 covering the microphone 41 are shown by imaginary lines. An air supply
passage 31 is formed in the upper portion 30 a of the housing forming member 22. The sensor
32 is visible in the lower part 30b. The rear surface portion 37 of the illustrated example in the
middle portion 30c is formed flat, and the bottom portion 51 of the cylindrical member 50 is in
pressure contact. A gasket 43 is integrally formed on the cylindrical member 50. The gasket 43
extends to the outside of the housing forming member 22 through a recessed portion 56 formed
in the peripheral portion of the housing forming member 22. Inside the cylindrical member 50,
the microphone 41 does not touch the inner surface of the cylindrical member 50. The case
portion 42 accommodates the output cord 41 a (see FIG. 1), and a portion extending from the
housing forming member 22 and the vicinity thereof are covered with a gasket 43. The gasket 43
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can prevent the vibration of the air suction and discharge unit 20 due to the rotation of the fan
38 and the motor 38 a from being transmitted to the microphone 41 via the case portion 42. In
addition, external noise can be prevented from intruding from the recessed portion 56. In the
case of the mask 1 illustrated in FIGS. 5-7, external noise is transmitted to the microphone 41 by
the double sound insulation structure formed by the base member 21 acting as a sound
insulation wall, the housing formation member 22 and the cylindrical member 50. You can
prevent that. Therefore, even in a noisy fire site where many fire engines are active and the
helicopters for digestion activities are turning in the sky, pilots of fire fighters and helicopters
who are wearing the protective mask 1 A person can be clearly transmitted through the
microphone 41. Also in the mask 1 in this case, the microphone assembly 45 and the tubular
member 50 can be freely attached to or detached from the housing forming member 22.
[0028]
The gasket 43 has a length that can extend from the cylindrical member 50 to the outside of the
air suction and discharge unit 20 so as to pass between the base member 21 and the housing
forming member 22. Also in the mask 1 illustrated in FIGS. 5-7, the case portion 42 is held
between the base member 21 and the housing forming member 22 via the gasket 43, whereby
the space 40, more specifically the cylindrical member 50, is held. The position of the
microphone 41 at the inside is fixed.
[0029]
Although the protective mask according to the present invention has been described above as a
full-face type having an eyepiece, the present invention may be practiced as a protective mask in
which the eyepiece is of a twin-lens type, or It can also be implemented as a half type protective
mask that can only cover the mouth and mouth and does not have an eyepiece.
[0030]
When the mask 41 is worn in an environment where the microphone 41 does not need to be
used, the microphone assembly 45 and the gasket 43 or the microphone assembly 45, the gasket
43 and the tubular member 50 may be removed from the mask 1. The voice from the voice
transmitter 23 comes out from the recess 56 and the like.
The housing forming member 22 can be formed with a plurality of additional concave portions
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acting in this manner. However, when the microphone assembly 45 is attached to the mask 1, it
is necessary to close the additional concave portion with a plug made of an elastic material such
as rubber. In the mask 1, even if the microphone assembly 45 and the tubular member 50 are
removed, the voice transmitting diaphragm 24 is not damaged as long as the transmission 23 has
the cap 25 on both sides thereof.
[0031]
The present invention described above can be organized at least as follows. A protective mask
attached to a transmitter including a voice transmitting diaphragm located in front of a face and
a microphone for converting sound from the transmitter to an electric signal, the diaphragm
being incorporated in the protective mask Mounted on the base member, the base member being
integral with a housing forming member that detachably contacts the base member so as to
surround the voice transmitter to position the microphone in front of the diaphragm From the
microphone located in the space, a case part integral with the microphone extends between the
base member and the housing forming member to the outside of the space, and the base The
housing forming member and the case portion are formed of a hard material that does not
deform, and the case portion By a deformable flexible material the base through the formed
gasket member and said housing forming member by being sandwiched, in a state where the
microphone is fixed in the space. The present invention has at least the following embodiments.
(1) A tubular member formed of a soft material which can be elastically deformed and covering
the microphone is incorporated in the space, and the tubular member faces a bottom portion
located forward of the microphone and the bottom portion And an open rim which abuts against
the periphery of the diaphragm. (2) The above-mentioned microphone is covered with the abovementioned cylindrical member in the mode which does not contact the inner surface of the
above-mentioned cylindrical member. (3) An electric fan capable of blowing air into the inside of
the protective mask is attached to the housing forming member outside the space, and the
bottom of the cylindrical member abuts on the housing forming member in the space.
[0032]
DESCRIPTION OF SYMBOLS 1 protection mask 20 intake / exhaust unit 21 base member 22
housing forming member 23 speaker 38 electric fan 40 space 41 microphone 41 a output cord
42 case portion 43 gasket 45 microphone assembly 50 cylindrical member 51 bottom portion
52 peripheral portion 53 opening
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