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JPS5344990

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DESCRIPTION JPS5344990
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
and FIG. 1 is a plan view and FIG. 2 is a sectional view taken along the line XX. 1 · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Piezoelectric material 2, 3, · · · · · · · · · · · · · · · · · · ·
· piezoelectric film · Adhesive, 8 ° 9 · · · · · · · · · Connection electrode.
Description of the invention] = base Ko呆 In its 2 to the one-electron-type blood Wang meter, of a
microphone to detect the Korutokonoho sound sensitive, 4 Rinikansuru. The one-child type
sphygmomanometer does not require skill for auscultation of the sound of Colt Kosoh. Although
this electronic sphygmomanometer receives Coltko Noho sounds with a microphone-it is Colt
Kosoe. 1t) 1, g-eyf 1 λ to λ! If you do not receive at the position closest to the artery, you can
not get good quality of 5-And, there are individual differences in @ pulse position; Sloppy,
improper installation position of microphone, and measurement error Cause. In order to solve
this defect, it may be considered to increase the area of the microphone's sensitivity. However,
the arm on which the micro: phone is placed is a curved surface, and the curvature of the arm is
also different among individuals. There is a conventional micro 1 off f, yo, wa. product. 2カニ
6いい9、あ、。 Since the sound of Korukosokoho sound is discriminated to storm 9
reservation with one frequency component, there should not be a unique slope point in the
frequency characteristic of one microphone, so conventionally the shape of the sensing part of
the microphone is circular It was limited. The present invention is intended to provide a sensing
unit of a microphone for a blood field meter which solves the above-mentioned drawbacks, and
will be described in detail based on the embodiment shown in the following. A flexible film
having electro-pneumatic conductive properties and elasticity on both surfaces of the stripshaped piezoelectric film (4) +2) 131 having a metal foil electrode i 21 131 on both sides of the
thin film-like king turtle material H) Membrane 15] 161 each. (2)-',... The flexible N 151 161
slightly protrudes from the longitudinal direction both fii (4a M 4 b) of the strip-shaped
piezoelectric film i 4, and the protruding ends r 5 a) C 6 a) (5 b M 6 b) are bonded with an
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electrically insulating adhesive 171171 . Further, both ends (4a) and (4b) in the longitudinal
direction of the piezoelectric film [4] are also adhered and fixed to the burnable film i 51 + 61
with an adhesive 171171. A sensing section (A) in which the piezoelectric film (4) and the
flexible film 01161 are laminated, and both longitudinal directions (4a) and (4b) of the Ichida
Nafisonem (4) are translated to the flexible d: 51 + 61 : Axle, strip-shaped longitudinal direction
is orthogonal to the arm, and is attached to the arm while adhering closely along the oil surface
of the arm. At this time, the anti-sense portion (A) is curved in the longitudinal direction, and the
piezoelectric film 14) to which one end C4a) C4b) is fixed is appropriately subjected to summer
tension, and this tension is acting piezoelectric The film (4) is able to receive the Colt Koso sound
over the entire surface.
On the other hand, in order to take out the electric signal generated from the peripheral
'electrodes 121: 311c of one piezoelectric film 14) 13) to both electrodes i 2 ++ 31 13 Since the
flexure g-415) 161 is insulated by the adhesive 171i 71, it is sufficient to contact the connection
electrode t 8) + 91 appropriately to the appropriate place on the outer surface of the one biplegia
film [51 161]. Further, since the impedance of the piezoelectric film [4] is very high, the
resistance value of the flexible F, A15) 161 may be relatively high. Furthermore, since the flexible
film f5L'61 is a conductive elastic material, when one sensing portion (A) is curved in one use,
the flexible film 151t61 and the electrode +21 + 3) are in close contact with each other and in
contact with each other. Increase pressure. Electrical contact is also good. As described above,
according to the present invention, it is possible to provide a sensing unit (A) having a large strip
shape and a large sensitivity on the electronic sphygmomanometer, and using the sensing unit
(A) Apply an appropriate tension to the piezoelectric film and facilitate electrode connection-and
protect the extremely thin piezoelectric film +41 on both sides with re-sedimentation film r) ++ 6
+ thickness of the sensitive part) Can be made easy to use.
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