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JPS55179484

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DESCRIPTION JPS55179484
BRIEF DESCRIPTION OF THE DRAWINGS Each drawing shows an embodiment of the present
invention. FIG. 1 is a front view of an ear microphone, FIG. 2 is a left side view of the same
drawing, and FIG. 4 and 5 are side views of an ear microphone according to another
embodiment, FIG. 5 is a front view of an ear microphone according to another embodiment, and
FIG. 6 is an ear microphone according to still another embodiment. FIG. In the figure, 1 is an
earpiece body, 2 is a sensing & 3 is a vibration big amplifier, and 4 is a foam material.
DETAILED DESCRIPTION OF THE INVENTION The unthinking part is the sensing part of the
vibrating pink-up type earma 1 crophone that picks up the bone conduction voice No. 1 in the
ear canal. Furthermore, it is possible that the size of each person's ear is closely attached to the
wall of the ear canal 1-2 / 7. The present invention relates to a sensing unit of a vibration pick
amplifier and an ear microphone capable of clear speech detection. This ear microphone is a
technology of T '棋 in the special electric wire @ 53-39563, which was previously proposed by
one of the inventors of the present invention, and in Japanese Utility Model Publication Nos. 5349607 and 51-121409. Are known. These ear microphones are inserted into the ear canal, and
the earpiece body having a sensing unit for sensing the bone conduction sound signal tube of the
wearer's own who transmits to the ear canal, converts the bone conduction sound signal sensed
by the sensing unit into an electric signal. A vibration pickup such as a piezoelectric element to
be converted is provided, and an air leakage passage for preventing the closing effect of the ear
canal is provided if necessary, or a sound for passing an output sound such as an air grooved
speaker to the ear canal Set the way 7. : It is a thing. Since the rl 感知 満 足 要 請 た め イ ヤ ー
ear microphone is for detecting sound from the wall of the ear canal, it is desirable that the
sensing unit satisfy the following requirements. 2-- Allowing the sensing unit to be in close
contact with the wall of the ear canal according to the size of each person's ear so that clear voice
detection can be performed. ■ Wearing feeling is good, and pain does not occur on the wall of
the ear canal to which the sensing unit is in close contact, even when wearing for a long time. ■
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Easy to install and remove. ■ Each person who has different size of the ear canal can easily wear
and remove. ■ The sensing unit should not cause pain or the like to the wall of the ear canal
during installation and removal. ■ Even if the sensing unit is in close contact with the wall of the
ear canal, the effect of closing the ear canal is not generated. ■ It is possible to pass output
sound such as air groove type speaker. ■ Even if the sensing unit is in close contact with the
external ear canal 11, it can hear the begging call from the surroundings and can be determined
on the direction of arrival of the sound to be able to have 4 ordinary conversations with the
people nearby. Heretofore, there have been known several techniques related to the "sensing
section" 3- for satisfying the folding condition n of the above-mentioned 2. The first is the
technology described in Japanese Utility Model Publication No. 53-44423, which was previously
proposed by the present invention, and the second is the technology described in Japanese Utility
Model Application Publication No. 52-55240, and Part 3 The second is the technology described
in Japanese Patent Application Laid-Open No. 52-64,922, which is also proposed by one person
of the present invention.
However, these techniques are each described in the above l. Although satisfied with the
plagiarism, only 4 were satisfied with respect to the other part of the spread of ■ ˜ ■. That is,
the first technique is to prepare and exchange sensing portions having different sizes from large,
middle, small, etc. ! However, there is a disadvantage in that the replacement sensing unit must
be prepared at all times. The second technique relates to a trumpet-shaped sensing section
having radial sides vs. parts, but this sensing section is not a part of the above-mentioned I and II.
In addition, the sensing part is always in contact with the wall of the ear canal by the spread 1human paneler, so it is easy to cause inflammation in the wall of the ear canal, and the trumpet
shaped sensing part is fully spread at the time of insertion into the ear canal Because it is in the
state, the pressure applied to the wall of the ear canal at the time of its installation is remarkable,
and there is a risk of damaging the wall of the ear canal, and furthermore, the trumpet shaped
sensing unit is the ear canal! (Since it is reduced as it is inserted, it has the disadvantage that the
raw hair and skin of the wall of the ear canal get caught in the slit part and the pain is severe.
Next, the third technique is to provide an expansion and contraction unit at or near the sensing
unit, expand the expansion and contraction unit by the operation after mounting the detection
unit, and reduce the expansion and contraction unit by the operation at removal. However, the
above-mentioned requirements can not be satisfied, and in particular, the structure is somewhat
complicated, and there is a disadvantage that low-cost mass-productivity is lacking. Therefore,
the first object of the present invention is all (1) to (1)! It is an object of the present invention to
provide a sensing unit of an ear movement pick-up ear microphone capable of satisfying rust.
The second object of the present invention is to solve all the above-mentioned drawbacks of the
first to third prior art of the prior art at once, ie, there is no need to prepare a sensor for
replacement. In addition, even when wearing, even when wearing or not, even if K is worn for a
long time, there will be no burning or scratching on the wall of the ear canal, 0 Do not care about
the raw hair or skin of the wall of the ear canal The object of the present invention is to provide a
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sensor tube of a vibration pickup type ear microphone which can satisfy the above items 1 to 0,
which is suitable for inexpensive mass production. Hereinafter, the details of the present
invention for achieving the above object will be described in detail based on the drawings. In
each of the drawings, reference numeral 1 denotes an earpiece main body having a sensing unit
2 which contacts an ear canal wall to sense a bone conduction sound signal, and incorporates a
vibration pinkup 3 such as a piezoelectric element. 4 is a part of or the whole of the outer coating
surface t of the sensing part 2-an open-cell foam material to be covered, which has a slow
recovery from the compressed state.
The foam material 4 of the present invention has a ring-like covering on the entire outer surface
of the sensing 11N2 as shown by 6 in FIG. 3 and a factor 2 in FIG. 3. As shown in FIG. Covering a
portion of the outer surface of the sensing portion 2 or a whole surface of the ore, such as
covering a portion of the outer surface of the sensing portion 2 in a single arc as shown in FIG.
(Stuck so as not to fall off easily. )すればよい。 The sensing portion 2 used in the present
invention is formed to be relatively smaller than the size and diameter of the human ear canal,
and the outermost diameter of the foam material 4 (the largest rear portion is the size and
diameter of the human ear canal). Also, it is preferable to form relatively large, for example, to be
in close contact with the ear canal in a compression state of 40 to go%. The shape of the foamed
material used in the present invention must be circular, annular or arc-like! For example, if it is t,
it may be a deformation such as an elliptical shape. Also, the shape of the sensing part must be
circular as well! However, as described in the draft for the first time in the proposal + 185344426, one of the ideas of the present invention may be a six-minute shape such as a circular
notch shape, as in the case of ordinary foam materials. (7) may be attached to the tip (the shape
may be gradually enlarged according to the shape). The effervescent substance used in the
present invention is an open-celled substance having a physical property that the recovery from
the compression state is slow, for example, preferably one having a time required for recovery
from the compression state of 40 to 6 ON for 10 to 60 seconds. be able to. The foamed material
having such physical properties is, for example, one produced by heating and foaming a vinyl
chloride resin, a foaming agent and a plasticizer as a plastisol, and the like, and it is easy to
obtain the commercially available product. The vibrating pink-up ear microphone of the present
invention may be any of those known in the art. Further, as shown in FIG. 6, the air passage for
preventing the effect of closing the external ear canal or the line sound path 5 may be single or
plural at the base of the earpiece body 1 so that air or sound passes through the outer periphery
of the sensing unit 2. (It is preferable to provide 4 + 1 fil at intervals). In FIG. 6, 6 is a lead wire
for extracting the output of the vibration pickup 3 to the outside, and 7 is a sound pipe (elastic
tube such as a rubber tube is preferable. ). Also in the case of such an eight-ear microphone,
since the foam material of the present invention comprises open cells, air and sound can be
communicated into and out of the ear canal. An example of use of the present invention having
the above configuration is as follows. First, the foamed material 4 is fully discharged by a finger
tip or the like.
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Next, the sensing unit 2 is inserted into the ear canal. Then, since the foam material 4 gradually
and warmly restores, the sensing unit 2 is pressed against the wall of the ear canal indirectly
through the contact or the foam material 4. The voice detection by the vibration pickup 3
includes detection of bone conduction voice signals (vibrations) passing through the sensing part
in the case of 1 ml from the wall of the ear canal or indirectly from the wall of the ear canal via
the foam material 4 Its action is similar to that of a conventional vibration pick-up shop ear
microphone. Since the sensing unit of the vibration pickup ear microphone according to the
present invention has the above configuration and the f'F river, it is possible to achieve all the
objects of (1) to (2) and (2) to (0).
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