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JPH10126873

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DESCRIPTION JPH10126873
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
external auditory canal insertion type bone vibration type microphone and vibration pickup used
in communication devices such as portable telephones, cordless telephones, general telephones,
and transceivers.
[0002]
2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional bone vibration type
microphone 14 has a built-in vibration pickup 15 and has a cylindrical sensing portion 16 which
contacts a wall of the ear canal and senses a bone conduction sound signal. Part of the outer
surface is covered with an open-cell foam material 17 having a physical property of slow
recovery from compression, and the coating of the sensing portion 16 covers a part of the outer
peripheral surface in a single arc shape And the compressed sensing material 16 is inserted into
the ear canal in a compressed state, and the sensing material 16 on the side facing the foaming
material 17 is brought into direct contact with the external ear canal wall by restoration thereof.
It can be closely attached to the wall of the ear canal according to the size of the human ear and
can detect clear voice (Japanese Utility Model Publication No. 58-21275).
[0003]
However, in such a conventional bone vibration type microphone, in order to sense the vibration
of the otobone at the sensing portion 16 through the foam material 17 which is a soft elastic
body, the otobone is accurately detected. In addition, since the sensing unit 16 has a cylindrical
shape, it is difficult to conform to the shape of the human ear canal and has a sense of discomfort
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1
when the sensing unit 16 is attached to the external ear canal. Since the substance 17 is
contained, clogging of the foam portion of the foam substance 17 occurs due to hand dust,
earwax or the like, and there is a problem that maintenance such as cleaning and replacement of
the foam substance 17 is provided.
[0004]
The present invention is a bone vibration type microphone which is excellent in maintainability
and can sense the vibration of the oto bone accurately by fitting the sensing unit in the external
ear canal without discomfort, and a highly sensitive vibration used in a bone vibration type
microphone etc. It provides a pickup.
[0005]
SUMMARY OF THE INVENTION A bone vibrating microphone according to the present invention
has a banana-like soft body having a substantially spherical surface at one end and bent along an
ear canal, and one on the outer peripheral surface of the soft body. An earpiece having a hard
body provided in a portion, and a vibration pickup means fixed between the soft body and the
hard body and fixed on the hard body.
[0006]
According to this configuration, since the earpiece is a soft body, there is no clogging of the soft
body by hands, earlobes and the like, and one end of the earpiece is substantially spherical, so
that the earpiece can be easily inserted into the ear canal. Since the body is a soft body, it is
closely attached to the ear canal, and furthermore, since the vibration pickup means is fixed to
the hard body, the vibration of the ear bone is accurately transmitted to the vibration pickup
means via the hard body.
[0007]
In the bone vibration type microphone of the present invention, the hard body is provided on the
other end side of the soft body.
[0008]
According to this configuration, the vibration of the ear bone is close to the large auricular
cartilage at the wall of the ear canal, so that the vibration of the ear bone is more accurately
transmitted to the vibration pickup means.
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2
[0009]
Further, the earpiece of the bone vibration type microphone according to the present invention
has a cavity from the end on the other end side of the soft body to the interval between the soft
body and the hard body, and the soft body and the hard body And are integrally formed.
[0010]
With this configuration, since the soft body and the hard body are integrally formed, the earpiece
is easily manufactured, and since the hollow portion is provided, the vibration pickup means is
mounted on the hard body rather than the hollow portion. The vibration pickup means can be
removed from the body.
[0011]
In the earpiece of the bone vibration type microphone according to the present invention, a
groove is provided on the outer peripheral surface of the soft body from one end of the soft body
toward the other end of the soft body.
[0012]
With this configuration, air that is compressed during insertion of the earpiece into the ear canal
escapes and external sound is transmitted to the tympanic membrane through the groove after
the earpiece is attached to the ear canal.
[0013]
The vibration pickup means of the bone vibration type microphone according to the present
invention is provided with a vibrating electrode plate for dividing the inside of the case into two,
and a weight provided at the central portion of the vibrating electrode plate.
[0014]
According to this configuration, the vibration of the otobone is transmitted to the vibrating
electrode plate through the hard body, and the weight of the vibrating electrode plate amplifies
the vibration of the otobone.
[0015]
In the vibration pickup means of the bone vibration type microphone according to the present
invention, a hole is provided in the case wall surface.
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[0016]
With this configuration, since the inside of the case is not sealed, the vibrating electrode plate is
more easily vibrated.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
[0018]
As shown in FIGS. 1 to 3, the bone vibrating microphone according to the embodiment of the
present invention has a banana-like hardness of 10 to 20, which has a substantially spherical
surface 1 at one end and is bent along the ear canal 2. Soft resin 3 made of soft resin such as
silicone rubber and hard resin such as silicone rubber, ABS resin, acrylic resin, etc. provided on a
part of the outer peripheral surface 3a of the soft body 3 with a hardness of about 70 to 80
degrees Or vibration pick-up means 6 composed of a vibration sensor fixed between the soft
body 3 and the hard body 4 and fixed on the hard body 4 and the soft body 3 And a housing 8
made of a rigid resin, metal or the like having a sealed structure to which the end 7 is fixed.
The bone vibrating microphone according to the present invention transmits the output of the
vibration pickup means 6 to a communication device such as a mobile phone.
When the sound quality, voice and the like of the communication device are adjusted, the output
of the vibration pickup means 6 may be transmitted to the communication device via an
equalizer, an amplifier 18 and the like.
[0019]
The hard body 4 is provided on the soft body 3 located on the lower wall 2 a side of the external
ear canal 2 on the other end 7 side of the soft body 3.
[0020]
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4
The earpiece 5 has a cavity 9 from one end on the other end 7 side of the soft body 3 to the time
when the soft body 3 and the hard body 4 oppose each other, and the outer peripheral surface of
the soft body 3 from the one end of the soft body 3 The soft body 3 and the hard body 4 are
integrally formed by a double molding method, each having a groove 10 in the direction of the
end 7.
The banana-like outside diameter size of the earpiece 5 is larger than the size of the ear canal 2
by about 2 mm to 3 mm.
The groove 10 of the earpiece 5 is provided on both outer peripheral side surfaces 3c and 3d of
the soft body 3 orthogonal to the lower wall 2a and the upper wall 2b of the ear canal 2, and the
other end located from one end of the soft body 3 to the outside of the external ear canal 2 It
extends to the portion 7, and the width of the groove 10 is made relatively wide, such as about 1
mm to 2 mm, in consideration of clogging of the groove due to hand marks, earlobes, and the
like.
[0021]
As shown in FIG. 4, the vibration pickup which is the vibration pickup means 6 has a case 11
made of cylindrical metal having a bottom at both ends and a position which divides the inside of
the case 11 in the direction orthogonal to the cylinder axis X into two. The disk-shaped vibrating
electrode plate 12 whose outer peripheral portion is fixed to the inner wall surface of the case 11
and the capacitor is formed by the vibrating plate and the back electrode plate, and the adhesive
or the like at the central portion of the vibrating electrode plate 12 And the through holes 19a,
19b and 19c are provided on the bottom of the case 11 so that the vibration of the ear bone is
transmitted to the vibrating electrode plate 12. The capacitance is changed, and the capacitance
is converted into an audio electrical signal.
[0022]
Next, the operation and effects of the bone vibrating microphone will be described.
In the bone vibration type microphone according to the embodiment of the present invention,
since the earpiece 5 is formed of the soft body 3 and the hard body 4, there is no clogging of the
soft body by hand scale, earwax and the like, and the maintenance performance is excellent.
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5
In addition, since one end of the earpiece 5 is a substantially spherical surface 1, it is easy to
insert into the ear canal 2, and since the earpiece 5 is a banana-like soft body 3 bent along the
ear canal 2, The earpiece 5 can be tightly inserted and attached to the ear canal 2 without pain
and discomfort.
Furthermore, since the vibration pickup means 6 is fixed to the hard body 4, the vibration of the
otobone is accurately transmitted to the vibration pickup means 6 via the hard body 4, and as a
result, clear sound can be obtained by the vibration pickup means 6. Can sense
[0023]
In the bone vibration type microphone of the present invention, the hard body 4 is provided on
the side of the other end 7 of the soft body 3 and on the hard body 4 located on the lower wall 2
a side of the ear canal 2.
That is, since the vibration pickup means 6 on the hard body 4 is provided at a position close to
the large auricular cartilage 2c of the otobone vibration, the vibration of the otobone is
transmitted to the vibration pickup means 6 more accurately. A clear voice can be sensed by the
vibration pickup means 6.
[0024]
Since the earpiece 5 of the bone vibration type microphone of the present invention integrally
forms the soft body 3 and the hard body 4, the earpiece can be easily manufactured and the
productivity can be improved.
Further, since the hollow portion 9 is provided, the vibration pickup means 6 can be mounted on
the hard body 4 from the hollow portion 9 or the vibration pickup means 6 can be removed from
the hard body 4 to improve maintenance.
Furthermore, since the groove 10 is provided on the outer peripheral surface of the soft body 3
in the direction from one end to the other end 7 of the soft body 3, air compressed during
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insertion of the earpiece 5 into the ear canal 2 escapes. Since the external sound is transmitted to
the tympanic membrane 2d of the ear canal 2 through the groove 10 after the earpiece 5 is
attached to the ear canal 2, the external sound can be easily heard.
[0025]
Further, since the vibration pickup means 6 of the bone vibration type microphone according to
the present invention is sealed off from the outside by the other end 7 of the soft body 3 and the
housing 8, noise and sound from the outside due to air propagation are The vibration is hard to
be transmitted to the vibrating electrode plate 12 and the inertia of the weight 13 of the
vibrating electrode plate 12 is transmitted to the vibrating electrode plate 12 via the hard body 4
to amplify the vibration of the otic bone, and further, in the case 11 Since the diaphragm 12 is
not sealed, the vibrating electrode plate 12 is more easily vibrated, and as a result, even a weak
otobone vibration can be perceived as a clear voice.
That is, the vibration pickup means 6 can detect only the voice of the person wearing the bone
vibration type microphone without sensing the noise and the voice from the outside, and
therefore can advantageously talk even in a noisy place. There is.
[0026]
In the bone vibration type microphone according to the embodiment of the present invention, the
hard body 4 is provided on the soft body 3 on the lower wall 2a side of the external ear canal 2,
but the hard body 4 is provided on the upper wall 2b of the external ear canal 2. You may
provide on the soft body 3 of the side.
In the bone vibration type microphone according to the embodiment of the present invention, the
soft body 3 and the hard body 4 are integrally formed with the earpiece 5 by a double molding
method, but the soft body 3 and the hard body 4 are Alternatively, the soft body 3 and the hard
body 4 may be fixed by bonding, fitting, insert molding or the like.
Further, a part of the cavity 9 on the side of the housing 8 of the vibration pickup means 6 may
be filled with a filler 20 such as a silicone resin as shown by an alternate long and short dash line
in FIG.
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[0027]
As described above, according to the present invention, a banana-like soft body having a
substantially spherical surface at one end and bent along the ear canal and a portion on the outer
peripheral surface of the soft body are provided. By providing an earpiece having the abovedescribed hard body, and a vibration pickup means which is between the soft body and the hard
body and fixed on the hard body, maintenance is excellent and the sensing portion can be used in
the external ear canal Wearing without discomfort, it is possible to accurately sense the vibration
of the otobone.
[0028]
Further, according to the present invention, since the hard body is provided on the other end side
of the soft body, the vibration of the otobone can be more accurately detected.
[0029]
Further, according to the present invention, the soft body and the hard body are integrally
formed with a hollow portion from the one end on the other end side of the soft body to the
interval between the soft body and the hard body facing each other. Therefore, productivity and
maintainability can be improved.
[0030]
Further, according to the present invention, since the groove is provided on the outer peripheral
surface of the soft body in the direction from the one end of the soft body to the other end of the
soft body, discomfort when inserting the earpiece can be reduced. After wearing the earpiece, the
external sound can be made easy to hear.
[0031]
Further, according to the present invention, since the vibrating electrode plate for dividing the
inside of the case of the vibration pickup means into two and the weight provided at the central
portion of the vibrating electrode plate, conversation can be performed even in a noisy place.
[0032]
Further, according to the present invention, a hole is provided in the case wall surface of the
vibration pickup means.
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[0033]
With this configuration, even a weak otobone vibration can be perceived as a clear voice.
[0034]
Brief description of the drawings
[0035]
1 is a front sectional view of the bone vibration type microphone according to the embodiment of
the present invention attached to the external ear canal
[0036]
Fig. 2 Front view of the bone vibration type microphone according to the embodiment of the
present invention
[0037]
Fig. 3 Same right side view
[0038]
Fig. 4 Cross section of the main part of the vibration pickup means used in the same bone
vibration type microphone
[0039]
Fig. 5 Front sectional view of the conventional bone vibration type microphone
[0040]
Fig. 6 Same left side view
[0041]
Explanation of sign
[0042]
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2 outer ear canal 2a lower wall of outer ear canal 2 upper wall of outer ear canal 3 soft body 4
hard body 5 earpiece 6 vibration pickup means 9 hollow portion 10 groove 11 case 12 vibration
electrode plate 13 weight
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