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JPS55152600

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DESCRIPTION JPS55152600
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a first
embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG. 3A is a first
piezoelectric ceramic plate constituting a piezoelectric vibrator. 3B is a plan view of the second
piezoelectric ceramic plate, FIG. 3C is a bottom view thereof, FIG. 4 is an exploded perspective
view showing a second embodiment of the present invention, and FIG. FIG. 6A is a plan view of a
piezoelectric ceramic plate constituting a piezoelectric vibrator, and FIG. 6B is a plan view of a
diaphragm. 1.1A и и и и и и Piezoelectric buzzer, 2, 2A и и и и и и и и и и и и и и и и и и и и и cylindrical support, 4 и
и и и и и и и и и Case 5A ~ 5F и и и ----- mounting holes, 6A to 6F ...... connection pins, 7 ...... sound
emission hole, 10,13,21 ...... piezoelectric ceramic plate, 1L15,22 и ииииии Main electrode, 12, 23 иииииииии
Feedback electrode, 20 ииииииииии Diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electroacoustic
transducer such as a piezoelectric buzzer using a piezoelectric vibrator. In a conventional
electroacoustic transducer, in particular a piezoelectric buzzer, a structure in which the vibration
node portion of the piezoelectric vibrator is supported by a cylindrical support, the cylindrical
support of the piezoelectric vibrator-1 / / "" Wllt Fixation to the body was done with adhesive.
However, in the structure as described above, it is difficult to align the center of the piezoelectric
vibrator or to set the position of the electrode terminal of the piezoelectric vibrator to a desired
position, and there is a drawback that the workability is bad. The present invention eliminates the
above-mentioned drawbacks, facilitates positioning of the piezoelectric vibrator, can easily
connect the electrode of the piezoelectric vibrator and the connection pin on the support side,
and can improve the workability. Would like to provide a bowl. An embodiment of the
electroacoustic transducer according to the present invention will be described with reference to
the drawings. 1 and 2 show a first embodiment of the present invention. In these figures, the
piezoelectric buzzer 1 as an electroacoustic transducer comprises the piezoelectric vibrator 2, the
cylindrical support 3 and the case 4, and the piezoelectric vibrator 2 corresponds to the vibration
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node thereof. Mounting holes 5A, 5B, 50 are preferably formed asymmetrically at the positions,
and the cylindrical support 3 is provided with connection pins 6A, 6B, 6C of a conductor, and
these connection pins 6A, 6tt, 6c Mounting fire 5A, 5B, 5 (! And protrudes from the tip end
surface of the cylindrical support 3 so as to be fitted thereto. Further, the case 4 has a sound
emission hole 7. The piezoelectric vibrator 2 is a bimorph type in which two piezoelectric
ceramic plates are bonded to each other, and a main electrode 11 and a feedback electrode 12
that holds the main electrode 11 on the surface of the first piezoelectric ceramic plate 10 as
shown in FIG. And the intermediate electrode 14 is formed on the bonding surface of the second
piezoelectric ceramic plate 13 as shown in FIG. 3 IBI, and the back surface of the second
piezoelectric ceramic plate 13 as shown in FIG. The main electrode 15 is formed. In addition, on
the bonding surface of the first piezoelectric ceramic plate 10, an intermediate electrode that
matches the intermediate electrode 14 of the second piezoelectric ceramic plate 13 is provided.
Attach the piezoelectric vibrator 2 to the cylindrical support 3 as described above by providing
an adhesive such as 7 recon rubber on the end face of the cylindrical support 3 and fitting the
mounting holes 5A to 5C into the connection bins 6A to 6C. The piezoelectric vibration coil 2 is
bonded and fixed to the cylindrical support 3, and the connection bins 6A to 6C and the
electrodes of the piezoelectric vibrator 2 are soldered. As a result, the connection bin 6 is
electrically connected to the main electrode 11.15, the connection pin 6B to the return electrode
12, and the connection pin 6C to the intermediate electrode 14, respectively.
Next, the case 1 is covered so that the sound release hole 7 faces the piezoelectric vibrator 2.
According to the first embodiment, a position corresponding to a node of vibration of the
piezoelectric vibrator 2 (1 (the mounting holes 5A to 5C are formed, and the front surface of the
cylindrical support 3 is formed in the mounting holes 5A to 5C) Since the more projecting
connection pins 6A to 6C are fitted in, the positioning is automatically performed simultaneously
with the mounting of the piezoelectric vibrator 2 at the same time Jcr alignment. The connection
between the connection bins 6A to 6C and the electrodes of the piezoelectric vibrator 2 is also
extremely easy, so that the assembling operation can be simplified. Furthermore, since the rear
end of the connection pin 6A160 160 works as a mounting pin to the substrate, the mounting
operation can be facilitated, and electronic components such as transistors can be directly
attached to the connection bins 6A to 6C. It is also possible to carry out the assembly of the
circuit. FIGS. 4 and 5 show the second embodiment of the present invention. In these figures, a
piezoelectric buzzer IA as an electrical front-end transducer comprises two piezoelectric
vibrators, a cylindrical support 3 and a case 4 and is equivalent to a node of vibration for two
piezoelectric vibrators. The mounting holes 5D, 5J5F are formed at the positions where the
connection support 6D is attached to the cylindrical support 3. There are provided fiB, 6F, and
these connection pins 5D, 6K, 5F protrude at the tip end face of the cylindrical support 3 so as to
be fitted with the mounting holes 5D, 5E, 5I '. Still, the case 4 has a sound emission hole 7 and
the piezoelectric vibrator 2A is a unimorph type in which the piezoelectric ceramic plate 21 is
bonded on the metal diaphragm 20, and the piezoelectric ceramic plate as shown in FIG. The
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main electrode 22 and the feedback electrode 23 are formed on the surface of the electrode 21,
the counter electrode is formed on the back surface, and the diaphragm 20 is in contact with the
connection pins 5D and 5 as shown in FIG. Through holes 24D and 24K are formed to allow
these to pass through, and a mounting hole 5F is formed to be fitted with a connection bin 61F in
which the projecting amount is equal to the thickness of the diaphragm 20. The attachment of
the cylindrical support 3 to the piezoelectric vibrator 2A described above can be performed in
the same manner as in the first embodiment described above, and the connection bin 6D is
connected to the main electrode 22 and the connection bin 6E to the feedback electrode 23, The
same effect as the first embodiment described above can be achieved even by the second
embodiment in which the connection bin 6F is electrically connected to the vibrating plate 20
made of gold a and the counter electrode, respectively. Like the clay, according to the present
invention, the positioning of the piezoelectric vibrator 9 is easy, and the piezoelectric vibrator, ''
electrode can be connected easily to the connection side of the support side, and the working
efficiency is improved. Obtain an electro-acoustic transducer capable of
4. Brief description of the plane Fig. 1 is an exploded perspective view showing the first
embodiment of the present invention, Fig. 2 is the same sectional view, Fig. 3 tAl is a plan view of
the first piezoelectric ceramic plate comprising piezoelectric vibrators. Figure 3 Figure 3 (Bl is a
plan view of the second piezoelectric ceramic plate, Figure 3 tel is a bottom view, Figure 4 is an
exploded perspective view showing a second embodiment of the present invention, and Figure 5
is a section thereof Fig. 6, Fig. TAl is a plan view of a pressure-ta ceramic plate constituting a
piezoelectric vibration I, Fig. 6 tBl is a plan view 1 of a diaphragm и 1, IA piezoelectric fuser 2.2 A
и и и и vibrates piezoelectrically 3 Tubular support, 4: case, 5A to 5F ... mounting hole, 6A to 6F ...
connection pin, 7: sound output hole, 10.13.21 ... piezoelectric ceramic plate, 11, 15. 22 и и Main
electrode, 12.23 feedback electrode, 2 o и и и Vibration plate. Utility model registration applicant
Tokyo Electric Chemical Industry Co., Ltd. Atsushi Taketo Murai 71-. Fig. 1 14 ==== Snow Paw
Hiro o Hitsu. ? 2nd 16 ? 1 near 26 003 ? utility model registration j ? ?? Tokyo Electric r L
? ? ? ? ? ? B B 105 B ? (: = ? i two (A) Figure 3 ( B, sx, 7.5B ,, i: c SC ░ C ? SC B '15: '5 Q
Q Sissi utility model registration applicant Tokyo Den- kan' 7 D 71 type company agent attorney
Takashi Ii 1A1225 E 235 o C 12 12 '2A Fig. 2 6 6 D-6 F% formula% utility model registration
applicant ? ? ? ?? ??? ??? ? ??? ??? E E 5E ?' (A) 21 21 "24 E ░ ? (B) 1j:
E'5 '! ? O / '? utility model applicant Applicant Tokyo Electrochemicals under? : I, formula
company agent attorney Nakai Iku 6, 1 iii note F addresser Tokyo-i'i 'M +;' u '? 1 1 1 1 13 No. 1
Tokyo Electric 1 H Science I-business Name of company Goto Mitsunobu / f) is 6-Q
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