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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a conventional
electret microphone, FIG. 2 is a longitudinal sectional view showing an embodiment of the
electret microphone according to the present invention, and FIG. 3 is a main part of the
embodiment It is a longitudinal cross-sectional view. 1.21 ... cross, 2, 22 ... capsule, 3 ░ 23 ...
diaphragm, 4, 24 ... back pole, 5, 25 ... back pole holder, 6, 26 ... FET, 7, 27 ... gate terminal, 14.
28 ... printed circuit board 1.29 ... microphone unit, 10 ... amplifier holder, 11 ... amplifier case,
12, 33 ... rear Room 13: amplifier circuit room 31: ring 31 31: spacer 32: elastic ring 34: resin
15, 35: amplifier circuit. j 41-65-real opening 5l-38428 (2) 93 eyes 66-
[Detailed description of the invention] This invention is a thin electret microphone [OI related!
FIG. 1 is a longitudinal sectional view showing an example of a conventional electret microphone.
In FIG. 1, the conventional electret microphone has a microphone unit s 9 and an amplifier end
15 and 1, and the microphone (1): ?uni?, ?g? 9 and ?angu? 15? Provision t substrate 14
and r> 11 f! A cylindrical amplifier holder 01 is provided, and in the holder IO, an amplifier-path
portion chamber 13 for accommodating the amplifier circuit portion 151 is formed. Also, in the
case of f) in the case of the back plate 4ff opposite to the back plate 4ff is open, the rear chamber
12 is provided at the rear of the front electrode 4). The rear chamber 12H back electrode holder
5 is hermetically sealed by, for example, being attacked by a hole tW oil or the like for passing
through a large electrode coat terminal 1. I had to roll 3 ░ by electret pufferfish Lee M ? m t by
sledting and then making m. Also, the gate terminal of the FET 6 is connected to the gate
terminal of the back ? ? pole 4 and is n-spot welded and soldered by 1 to 10 ru. Then, the
manure water portion 9 and the KW & * in on the substrate 14 and the amp holder 0
accommodating 15 tubes of the 1st boot are housed in the amp case 11 and integrally coupled to
the ?- There is. 1 kq (amp case IIIF) The lower part of the 1-fold broken n-piece is added by nine
units. ? 7 (as explained above t Conventional electret microphones are 11 '1141 characteristics
of electret microphones? -Control room 2-i-(3)-The rear room of the guard and the amplifier @ ?
111! ! ? It was not easy to make the electret microphone thinner and to use another layer I [-vr.
This device ? ? f ? ? ? ? ? ? ? ? ? ? g))) ? ? ? ? ? ? ? ? ? ? ? ? E electre,
Tomitata? In order to achieve the purpose t to achieve this purpose, the device according to the
present invention, a piezo-electric type acousto-electrical conversion means having a back pole 1,
and a back pole holder for supporting a III distribution pole of a sieve conversion means; III
'connected to the back pole and located at the rear of the back pole empty amplifier 1 s @ r
installed amplifier-the end, said amplifier circuit section is provided with a fl ? printed circuit
board, l1lIIIl! Converting means, III distribution pole holder, Saki 1 path section, at 'printed
circuit board, capsule to be housed, containing 1, Sprint printed circuit board and # 1 t! Seal the
lower end of the capsule with a tube resin 1 * ?-Hereinafter, one embodiment of the ? ?
electret 27t microphone according to the invention will be described in detail ? 2m light ? ?
invention K ? ? electretoma (2+) ic And a cross pole is provided at the upward opening of the
capsule shell, and the back electrode is provided with a vibration 1i23 and a back electrode
which forms a hand-shaped acousto-electric conversion hand arranged in parallel with the cross
gear. U is provided.
And a back electrode holder 5 supporting a diaphragm plate, a 1I1I back pole plate, and a back
pole 24'ft. ** The spot welding on the back electrode '14 is composed of a gate terminal 21
having a gate terminal 21 welded by soldering etc. and constituted by KL's, such as fi, f amplifier
circuit section, and printed circuit board section of amplifier circuit section [ 2B is housed in a
force plate 22 and between the caulks on the lower end of the capsule and the printed circuit
board are sealed with resin ropes to make the rear chamber tube a complete book. The amplifier
circuit unit 35 is installed in the rear chamber 33 which also searches the amplifier circuit unit
chamber, and the characteristic tube is controlled through the small hole of the back electrode U
(the back hole U is a small hole in the back of the IIM). ? ? ? ? V V f f f f f f f f f f f f f f f f f f f
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Capsule-A space that can be opened,
and diaphragm plate and ring (material) and love adhesion (4) pa ?. Ring I and I lose when
bonding with agents! ! In order to eliminate the double sleep of the movement [73 and r) the
adhesive layer and also the size of the adhesive layer, and the NJfl between the diaphragm n and
the ski f-31) and the M group, K is Ill! 3 Fig. ?) Work with ring K with opening R elasticity with
capsule 4 and capsule 4 1h и In order to make the electret microphone according to this
invention have single directivity vr, 7 'lint Board row and spine I! A pipe pipe through which a
pipe penetrating # 1 and a gap between the #RS plate and the back pole 24 and the circulation
with the outside is once worked, and a pipe with a non-directional pipe also made by KIIII's Mitra.
It is sufficient to set up a device for blocking. When voice enters the above-described
microphone, the electric signal is input to the amplifier circuit section from the gate terminal
section in response to the change of the city spirit due to the vibration r of the moving plate,
amplified by the amplifier circuit section and output. . This device is described above. In the
embodiment, it is acceptable to use an IC or the like as the amplifier circuit portion without being
limited to a fixed one. tt1 Unidirectional gold bearing f) Technical method F1a1F) Adopt the
method [Even even if the work и и и (5)-more than one explanation and t present invention electret
microphone printed circuit board and capsule g) lower end The solder of the printed circuit
board is sealed with resin by sealing the lead wire solder welding cp / sm during lead wire solder
welding and the risk of preventing the capsule r from being shorted "r-? ? ? ? ? ?
Conventional case, ? ? ? amp holder You can reduce the cost by unnecessary), and you can
use it freely because it is thin. 4) @ 4.11! IJU Brief Description Fig. 1 shows a longitudinal cross
section of a conventional electret microphone LliliWb ? 2!
14) f) Devise K such an Akebono elect 21 and show a longitudinal section of one embodiment of
tomike, ? 3 ? ? # 1! Example! ! It is a section longitudinal image-. 1.21 и и и и и Cross 2, 22 и и и и и и
Capsules 3.23 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и front pole 5.25 ииииииииииииииииииииииииии
FET 7, ? иииииииииии Gate terminal 14. и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и. иииииииииииииииииииииииииииииииииииииииииииииииииии Elastic ring M ииии Resin Is, 3! 1 - - ... amplifier (b) the final part
applicants stars 11 device manufacturing stock Board (off attorney Attorney Arai pressurized ?
this ---- I (Ma) parking 1 Figure T и / 2 degrees 261271611Jl?I4: ? Condy 7 и и и 2 Figure 3 z 3 3
9 4 z 3 4 4 J 3 ? Noro 2 ? 7 3 Figure, 22 zl JO ? 743 ? 74 applicant applicants, Electronics
Manufacturing Co., Ltd.-52, agent Arai Keisuke ^ ?), ? ? ? 6, Inventors other than the above
inventor or agent 1 character ? ? ?: ? 2 ((1) inventor Yao immersive voice-Example ?
Address Osaka Prefecture Yao City Kita Kita Kuho-ji Temple 1-chome No. 4 4 ?-Rikiya Electric
Manufacturing Co., Ltd. in Iu town Totoshi name and name Akira Ido (2) Agent address Kitayamaku, Osaka 6 Kamiyama-cho, Umeda ? Building -2- ? 530 Telephone 06 (312) 0187 Name
Patent Attorney (2947) Akiyama Shozo
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