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JPS52145090

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DESCRIPTION JPS52145090
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
microphone of the present invention, FIG. 2 is a cross-sectional view of a microphone of one
embodiment of the present invention, and FIG. Fig. 4 is a plan view of the waveform detected by
the microphone of the embodiment and the waveform of the Korotkoff sound by the stethoscope,
and Fig. 5 is a diagram showing the waveform when the microphone of the related art is used.
FIG. 6 shows the result of frequency analysis of each Korotkoff sound detected by the
conventional microphone, FIG. 7 shows the waveform of each Korotkoff sound, and FIG. 8 shows
each Korotkoff detected by the microphone of the above embodiment FIG. 9 is a graph showing
the result of frequency analysis of sound, and FIG. 9 is a graph showing the waveform of each
Korotkoff sound. 11 ... a substrate, 13 ... an elastic member, 14 ... a diaphragm. 15: Piezoelectric
vibration element.
Detailed Description of the Invention In the case of measuring L1 blood pressure according to the
present invention, generally, the improvement of the microphone for sphygmomanometer for
detecting Korotkoff sound, the blood pressure tel + line when it is determined, 17 points in the
upper arm first The internal pressure is set higher than the systolic blood pressure, and then the
internal pressure of the manchette is gradually lowered, and the internal pressure of the
manchette when the Korotkoff sound first appears is taken as the systolic blood pressure, and the
manchette's inner pressure tube is lowered to finally Korotkoff. The internal pressure of 7-noneth
immediately before the sound disappears is the diastolic pressure 4. When the Korotkoff sound is
manually performed by the microphone by the microphone, listen to the Korotkoff sound, and
when automatically measuring the blood pressure, use it as a recognition standard of
measurement. It is desirable to accurately identify and detect the Korotkoff sound in order to
determine the blood pressure in this way. However, the detection microphone needs not only the
Korotkoff sound. It is basically difficult to accurately identify and detect only Korotkoff sounds
because skin movement and other noises come in too much. Furthermore, Korotkoff sounds have
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their amplitude, number of beats, etc. It is often very different. For this reason, in the case where
the direct pressure 1 is automatically measured to 1%, the conventional obstacle for horizontal
mountain 7 to w, which is to be regarded as a serious problem, is shown in FIG. A case 1 and a
diaphragm 2 wound around the opening of the case 1 are provided, and the outer surface of the
diaphragm 2 is brought into contact with the measurement site of the human body, and the
diaphragm 2 is piezoelectric The vibration element 3 is stuck and it is a transition. Looking at the
measurement results obtained using such a conventional microphone, not only Korotkoff sound
but also arterial sound as unnecessary noise and the like are simultaneously detected as
discussed later. In the past, means for eliminating all electric circuits, especially noises generated
continuously among noises detected simultaneously with Korotkoff sounds under such
circumstances, but this means utilizes electric circuits Rounding makes the device extremely
expensive, and unnecessary noise is also amplified when amplifying the detection sound, and the
present invention, which is not necessarily an effective means, is made by paying attention to the
circumstances as described above. Therefore, the purpose is to improve the L detection
microphone itself, eliminate noises and so on other than Korotkoff sound at the detection stage,
and detect only Korotkoff sound by job separation Hereinafter, an embodiment of the present
invention will be described with reference to the drawings. That is, FIGS. 2 and 3 show the blood
pressure movement microphone, in which 11 is a substrate of the microphone coco / the
substrate. 11Vi glass Ehoki /, metal foil is resin, and is formed in a disk shape with a diameter of
about t125 and a thickness of about 1.5 w to 2.0 um. The vibrator 11 is attached only via a linklike elastic member 13 described later, and the substrate 11 and the diaphragm 14 are disposed
facing each other with the elastic member 13 interposed therebetween. The elastic member 13 is
attached to the substrate 11 and the diaphragm 14 by adhesion or the like as a means, while the
elastic member 13 has an inner diameter of 20 mm and an outer diameter of 25 m like the
substrate 11. Thickness The formation of n Teii to 4m1lll.
In addition, elastic materials such as Noricon rubber are used so that the material absorbs
frequencies of 30 Hz or less under the above-mentioned shape, and Korotkoff sound of
frequencies of 30 Hz or more is absorbed by one thousand elastic members 13 (9), the peristaltic
plate 14 is made of glass epoxy), and it is formed in a disk shape with a diameter of 0-2 vm to 0.3
and a diameter of 25. Note that the diaphragm 14 is fused to the portion to be measured when it
is used, and a piezoelectric vibration element 15 such as a bimorph element is attached to the
center of the inner surface of the diaphragm 14. It is detected that this is an electrical vibration.
On the other hand, the end sK of the base fiJJ @ t) elastic member 13 is connected to the small
cable 16 and this signal cou- ble 1 lead 0 III @ 19 and 19 are squeezed by the piezoelectric
vibrating element 15 When only one copper foil for shielding is attached to the inner surface 12
of the substrate 11 and the blood pressure is determined by using the above-mentioned
microphone ? # 1, the foreign-made surface of the diaphragm 14 is applied to the surface of the
human body It is good that the pressure is measured by the same method as in the prior art.
However, with the above configuration, the piezoelectric vibration element 15 is excluded as
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much as possible to noise other than Korotkoff sound, and only the Korotkoff sound is easily
detected and detected. This is because the elastic member 13 is interposed between the base
plate 11 and the diaphragm 14 to absorb the noise component in the transmission region such
as the arterial layer. Korotkoff sound is a frequency component of 30 Hz or more, and therefore,
it is hard to be absorbed by the elastic member 13. However, skin vibration and arterial pressure
vibration are mainly 30H! Since it is a frequency component below, it is possible to identify only
Korotkoff sound as much as possible and to effectively detect it in the piezoelectric vibration
element 15 in order to be absorbed easily by the elastic member 13. The result of the experiment
with the microphone at tC is as follows: Fig. 4 shows the output waveform 0) obtained by the
microphone and the output waveform of Korotkoff sound by the 01 m 110 eye stethoscope (b)
Are the waveforms of Korotkoff sounds, respectively, whereas the experimental results with the
conventional microphone show that it is the 5110th excess 1, corresponding The waveforms to
be displayed should be assigned the same numbers as in FIG. As is apparent from this result, it is
understood that the noise portion O waveform 2J of the present invention is extremely small as
compared to the waveform xspc of the conventional noise portion.
The noise part O output is reduced and the Korotkoff sound is clearly identified and attenuated
without attenuation. With regard to the above two results of O experiments, the frequency
analysis of Korotkoff sounds and the waveforms of their seven tosses are performed as shown in
FIGS. 6 to **. First, each Korotkoff sound detected by a conventional microphone, t! The sound
two beats before the first sound 111 (Fig. 6 mu), the first sound (position indicating the highest
blood pressure) (? и mII), the sound one beat after the first sound (S @ C), Sounds one beat
before the fifth sound (Fig. 6D), the fifth sound (the position of the diastolic blood pressure tube)
(Fig. 6E) and the sound after the fifth sound 02 (Fig. 6) From the analysis result of the frequency
of F), it can be understood that noise components other than the frequency of Korotkoff sound
(low frequency components of 50 Hz or less) t- include many. Also, when looking at the
waveforms corresponding to the above-mentioned sounds, superposition of noise components
can be seen as is apparent from the respective drawings of FIG. 7. On the other hand, each
Korotkoff sound detected by the microphone of this embodiment, that is, The first sound 01 beat
before the sound (FIG. 8A), the first sound (Hp), the sound one beat after the first sound (FIG. 8C),
the O sound one beat before the fifth sound (FIG. 8C) Analysis of the frequency of the sound after
one beat (Fig. 8F) of the fifth blue (Fig. 8E) and the fifth sound (Fig. 8F) shows that the first sound
is given in comparison with the above-mentioned sub * IIK. In addition, the frequency (50 Hz or
less O frequency range) m which becomes noise decreases for all Korotkoff sounds. The noise
level of less than 4.20 Hm is significantly reduced. As is apparent from each of the figures of FIG.
19 and the graph of FIG. 20, each of the O waveforms corresponding to each sound has a clear
Korotkoff sound waveform without noise superposition. With Shimaru, Korotkoff sounds can be
clearly identified as both city and hearing sounds. According to the conventional microphone
diphone, even the sound after 2 beats of the 5th blue corresponding to the lowest blood pressure
value 55HsO frequency While the component is entrained and the output is also output at 1 lK,
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the microphone of this embodiment and the O-wave sensitivity component of 30 Hz or more do
not appear at all, and according to the microphone of this embodiment O output has dropped
sharply. Because of this: I four Tokoff sound annihilation time 01111! Is easy. In addition, it is
possible to find a diastolic blood pressure value that is accurate. Furthermore, the waveform
width t of each Korotkoff sound is much smaller than that of the conventional rattan sound. This
indicates that the present invention is easily vibrated to Korotkoff sound, and the response is
good. As described above, the invention can increase the sensitivity to the Korotkoff sound, and
an elastic member is interposed between the vibration element and the substrate to be brought
into contact with the measurement site of the human body. Since all noise components in the
region are absorbed and sensitivity to Korotkoff sound is enhanced, only Korotkoff sound can be
detected as effectively as possible.
Tsutomu), Korotkoff sound is detected in a state where it can be clearly identified both
electrically and as a hearing sound. Therefore, accurate blood pressure measurement can be
performed, and is it also effective when automatically adding one by the device? It becomes a
detection means-furthermore, while the structure of the microphone itself is simple, detection of
noise is prevented in advance in the detection stage, and noise components are not eliminated by
an electric circuit etc. after the fact. It can be economical. 4, FIG. 1iiO Brief Description The imm
is a cross-sectional view of the conventional microphone tube of the present invention, FIG. 2 is a
cross-sectional view of the microphone of one embodiment of the present invention, and FIG. A
plan view, FIG. 4 is a diagram in which a nine-wave zero-shape detected by the microphone of the
embodiment and a Korotkoff sound waveform by a stethoscope are similarly arranged, and FIG. 6
shows the result of frequency analysis of each Korotkoff sound detected by the conventional
microphone, FIG. 7 shows the waveform of each Korotkoff sound, and FIG. 8 is detected by the
microphone of the above embodiment. Each: A diagram showing the results of frequency analysis
of I Rotokov blue, FIG. 5: the piezoelectric vibrating element, applicant Attorney Attorney
Takehiko Suzue 1 Figure 1 - Nana s in Figure 2 one ruins 1; 19161812 8! I: и l '-1-1176 21411
1313 Applicants qtv' e-Med4 4 agents Suzue Takehiko 4th 2nd Army 2nd 22oo 22 Figure 5 112
122 22 22 45 90 each, 7621412 / 3 Applicant Corporation Tek EK formula ? rum I abscess r
? r ?-? 6 (A) (B) (C) (C) (D) (E) (F) "L, s, UsMM. 50t) Of shoulder [FIG. 7 (A) (B) (C) (D) (E) (F>
country ? ? ? ? ? ? ? ? ? ? ? ?8 s (A) CB) (C) (D) (E) (F) "Filled [ML ░" (Fig. 9 (A) (B)
(C) (D) (E) (F) "black"-"Less" ttt 13 50 50 g'L Takewa, , L, 3. -Applicant Chil t '': r ? 7 Vi. -"Me," ".
'5 List of attached documents (1) One letter of attorney's letter (2) one statement (3) one drawing
(4) application copy one copy (6) examination request one copy 6 the inventor of other than the
above, practical Applicant for patent registration or agent, ?? (tll # i 1,... 911 + 7) 2 Ekichi иии: '1:
i и ? (2 rational address Minato-ku, Tokyo Shiba Nishi Kubo 2nd Sakuragawacho 17th Mori
Building.
Name (5743) Patent Attorney Takeo Miki Address same name (6881) Patent Attorney Tsuboi Tai
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? ? 1-1 J 1 S 1
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