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DESCRIPTION JPS4852530

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DESCRIPTION JPS4852530
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view and a side view of a conventional
electroacoustic transducer, FIG. 2 is a sectional view at the time of bending vibration, and FIG. 3
is a longitudinal sectional view of one embodiment of this invention. FIG. 4 is a cross-sectional
view of a part during the bending vibration. 6 ...... conductive adhesive 7 ...... Ebokishi insulating
adhesive. -+7 Sat 2 figure, No i》 t》 ゝ j-ゝ 4-73 1 48 48-52 5 30 (2) 3 3 Figure 4 1
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electroacoustic
transducer in which a piezoelectric element and a diaphragm are integrally bonded. As shown in
FIG. 1, this kind of electro-acoustic transducer resembles the Ia pole 2.5 on the front and back of
the eaves-like piezoelectric element 1, and when an alternating voltage is applied between the
electrodes, As shown in FIG. 2, when the piezoelectric element 1 stretches and contracts in the
radial direction, the piezoelectric element 1 is bonded to the piezoelectric element 1 to perform
bending vibration integrally with the next diaphragm 4 and to generate an additional 11 #.
Therefore, it is an adhesive with a large elasticity and a small amount of transmission loss of
vibration J <-> -48-52530-02 U] at the contact between the piezoelectric element 1 and the
vibration IE11, and the element 1 It is necessary to have a strong adhesive force that does not
cause a gap between the plate 4 and the V # surface. ・ Conventional epoxy resin such as candy,
phacyanoacrylate, etc. has been used. (4) If the electroacoustic transducer is used for a long
period of time, adhesion will be poor, and since these adhesives are insulators, the contact
surface KtI of the electrical connection between the element 1 and the plate 4 is small. Since the
protrusion St-through is conducted, it is incomplete. Therefore, a part of the peripheral edge of
the electrode 2 on the surface of the element 10 is cut away] and the electrode on the surface is
covered with the surface of the electric and black 1t-element 1 on the back surface. [2] extension
to the notch [, · · · through the extension of the electrode 5 It has also been made to connect to a
square of Miko. Although some adhesives have conductive tubes, they have a large transmission
loss of vibration and inferior adhesion as compared with the above-mentioned adhesives. This
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device is a simple structure that can be used to strengthen the mechanical connection between
the piezoelectric element and the probe and strengthen the capsule life t- and to use the
conductive adhesive for the bonding of one and the other 11 and the jIi's A1: to make the electric
system better, AO-1: The purpose is to make the electro-acoustic transducer possible. This
invention is a poetry piece. S @ is a cross-sectional view of one embodiment of the present
invention, of the circular diaphragm 4 made of phosphor bronze! l!! Place a disc-shaped
piezoelectric element 1 in the center of the surface! Only 110 depths and almost 11! A
piezoelectric element 1t made of barium titanate based magnet 6 provided with JyM size 5 and
provided with electrodes 2 and S on the front and back surfaces 1 and 5 made of zinc phosphate
lead titanate based porcelain is put in this hollow 5 On the back side of element 1, glue adhesive
to the bottom of recess 5 with conductive adhesive 6, and the peripheral edge of element 10 and
the edge of recess 50 of diaphragm 4 have a small transmission loss of the vibration axis and
high adhesive strength. "S" indicates an alternating current power supply.
With this construction, as shown in FIG. 4, the radial expansion of the piezoelectric element 1 is
transmitted through the peripheral edge of the recess 5 to the diaphragm 4K [11], and the
restoring force of the diaphragm 4 when the element 1 is contracted in the radial direction. As a
result, there is no need to replace the mechanical bond between the element 1 and the
diaphragm 4 as in the conventional case with only the “l # adhesive”, and the conductive
adhesive 6 is used, AQ-1, “) l , Qn-nA] so that the electrical connection between the electrode 5
of the element 1 and the vibration w4 can be improved, and a conductive adhesive such as a part
or all of a tube adhesive such as a silicone based adhesive etc. It is also possible to extend
mechanical life of the piezoelectric element 1 and the diaphragm 4 more strongly than the
conventional 11KL and extend its life by replacing the snow with an adhesive having a small loss
and a high adhesive strength. In the case where only the insulating adhesive is used, a part of the
back Its electrode black of the element 1 is extended through the periphery of the element 1c to
the notch on the periphery of the electrode 20 in the same manner as in the prior art. In this
electro-acoustic transducer element capable of connecting the electrode 3 and the power source
8 through the electrode, the piezoelectric element 1 is coupled with O by which the bump 5 is
provided at a predetermined position of the diaphragm 4 At the same time, it is possible to save
the time for performing the axis alignment t between the two. As described above, the electroacoustic transducer according to the present invention can make the mechanical connection
between the piezoelectric element and the diaphragm * m with a simple structure, and extend the
life thereof. · · Conductive adhesive for bonding of both The electric continuity of both of them
can be said to be due to good taste. 4! Brief description of Ellf 1 s is a figure of the Hoei e
electric sound conversion element e flat W and a drawing, FIG. 1 is its rrJll S-view at the time of
vibration, and FIG. Longitudinal cross-sectional view of the fourth melt and its shoulder-part o @
ill at the time of vibration. 6-conductive adhesive · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · human agents for fire protection
industrial corporation Ltd. 1 1 “'i 7 7 =) 7'? −−ゝi・・:」す38″、・、。 + 4 figures. r a
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thousand wlnthl! Image-^ Amami Disaster Prevention Industry Co., Ltd. 48-52530-074 Annex V
reference meeting (11 specifications 1 12) IfM 1 general) application duplicate 1 G 4) subject 1
non-working clerk creator Neri Makka ξ シ イ シ イ Address Tokyo, Nerima-ku Kamiishikamii
lTh100 Mito Kento Mitsu name Tomi 1) e party 4B-52530-08
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