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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of a conventional ultrasonic ceramic
microphone, FIG. 2 is a side sectional view of the same, FIG. 3 is a bottom view of the same, and
FIGS. FIG. 5 is a side sectional view of the ultrasonic ceramic microphone according to an
embodiment of the present invention, and FIG. 6 is a characteristic view of the proximity switch
using the same microphone. q plate, E terminal, O10 ', 10 "..... reflected wave, 11 ..... resin. Fig.1
Fig.2 Fig.6-Fig.5-Fig.4 (c) (Fig.3) Fig.4 (c) (B) -62-Fig.5 Fig.6 Fig.6 (mV ) -63-
[Detailed description of the invention] The present invention is the amount of attenuation time
when receiving pulsed ultrasonic waves. Eclophone t-Providing 4 eels. First of all, I will explain to
you about 1st to JIB 3III and t about ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
microphone. In the 1st to 8th gardens, 1 is the tIIIl plate of the metal case and operates as a
resonance plate. 1 'is a metal case 1IiIi. 2 is a piezoelectric element, and this piezoelectric
element 2 is a front plate which operates as a resonant plate! ?????????????? The
numeral 8 is a terminal plate of forged material, 4 # i metal pace, 6 is a lead wire and connects
the facing electrode of this lead @ 6Td piezoelectric element 2 and the terminal 7. In the case of
8 # i earth electrons, 6 is a solder for grounding the metal terminal 28 and the metal paste 41 ?
?, and the solder 6 and the case * 1 ft 1 ? are in contact and electrically conducted. Upper E
The conventional ultrasonic ceramic microphone has a resonance plate 1 for the piezoelectric
element 2 to operate as an electromechanical conversion element when an electric signal of the
same number of waves of the terminal 7.8 eC # diaphragm is applied. Resonates to generate
ultrasonic waves' fr. Conversely, when an ultrasonic wave at the resonant frequency of the
common plate 1 is applied, an electrical signal of that frequency is generated between the
terminals 7.8. Using this type of microphone four phones vi ? ?, ultrasonic waves are
transmitted as pulses from the transmitting microphone, and reflected by the proximity-reflected
by the microphone tube reception m7 that is returned and received, and the presence or absence
of a proximity object A proximity switch that can be detected is configured. However, when the
proximity switch is configured using the above-mentioned conventional ultrasonic ceramic
microphone, it is for direct payment from the transmitting microphone! Due to the long decay
time of the ultrasonic waves entering the icrophone, it is not possible to detect a nearby object
before it attenuates. 3. Explain this situation in the fourth cabinet. 4th Fs Fi Microphone 0
Receive 4M! ! In the case where the shape is shown (Oshi, 4 @ A is a close object or relatively far,
B is relatively close ?). The super-gwlO pulse or pulse f11 is sent from the transmitting i
microphone 7 on, and the microphone for receiving 411 receives it, and the microphone
microphone for receiving it directly from the microphone for the reception microphone receives
an ultrasonic wave of 2-11 Appears on the receiving microphone as
9't J, and O from near
tremor. It appears in the form of L contact @ txHIIb1o, 1o'o. In this case, the present invention is
relatively far-rounded so that it can be pricked up to 8 or 10 as self-similar to Filall A, and it is
easy to make a nail to identify the presence or absence of nail work O, proximity-is metaphorical
If it is close, the received waveform tlBfD becomes K, and 91 and 1? are obtained by tms.
As a mourning-like microphone company injury, ? giO bandwidth or ugly, it has a drawback that
it is difficult to use. The present invention will be described with reference to FIG. 4 to eliminate
the above-mentioned conventional defects, and an embodiment of the present invention will be
described together with the same reference numerals as those of the prior art with the same
reference numeral 6. In 11es ?, 11 is a resin of epoxy resin, 69 of this 40 resin 11 # i
piezoelectric element 2 and the periphery 3 'of the piezoelectric element 2 including the
piezoelectric element 2 on the entire side of the resonance plate 1 Km cloth bonding n is not . In
the 1 # example shown in J11611, the resonance plate 1 and the case are integrated, but this
resonance plate 1 is a metal disc tube, and it is also possible to stick it to the forward facing of
the It1 cup O case. When a pulse-like m1ll beast is received by the 6th-company's main vibration
microphone, it shows an O-shaped lanyard, and in FIG. 6, a direct wave 1 # is a reflected wave. As
is apparent from ? 6--in the case of a book 2 # microphone t-stabilized, it becomes a vibration O
attenuation or o, sms и C Ik, so 1i image sheet 9 # and reflection good 10u It is possible to
distinguish objects that are in close proximity to one another with more than 16 shades in the
furnace. In addition, the bandwidth of this invention microphone is 4 to 11 as shown in the prior
art O microphone o 7 on is 4 to ? times 111 [, and there is no bad friend or aid in the fillt IL
number, so it will be stable once it is bright A point switch that can obtain a proximity switch. 4.Between the surface of the car, the surface of the car 6, and Fig. 1 is the top view of the original
ultrasonic sera Z Tsuta Microphone, and the second play is the same. A, B & i and n are the
characteristic diagrams of proximity switches using Oka Maitarofon, 61! I is a cross-sectional
view of a roaring beast sera microphone in one embodiment of the present invention, $ IK 6 is
the same! The proximity switch V ** shown in FIG. 1 иии 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 terminal type, 40. ииииии Metal base, 6 ииииииииииииииииииииииииииииииииииииииииииииииииии Earth
terminal, 9, W, 9 ?-иии Direct wave, 10 ░ 1?, 10 # ииииииииии Reflected wave, 11 ииииииии Resin. Name of
extra payer 9Pia Shishi Nakajima Toshio et al. 14a-1% Figure 1 rotation-~ ~ ~ ,? ??????
?????????????????????? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? 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 (4) (mV) electric (C) 4 hours
(++ cle . ?????????? 'TO' electric (B) pressure 456 ? ? m, xec)-name of the agent
69526; ? Toshio Nakao Fig. 5 111 1 4 ? 7 sixth!
I (mV) 1 q ~ A electric "trj" pressure, 456 hours (l 6) I 4th generation's Mr. 16 952 ? ? ? ? ?
6 Other inventor and agent (1) inventor's address Osaka Prefecture Kamon Shin City Daijimon
Makoto 1006 address Matsushita Electric Industrial Co., Ltd. Toss Blue Toshi I ? Name 1)
Nakasuharu I. (2) Agent address Osaka Prefecture Kadoma City Oza Kadoma 1006 Address
Matsushita Electric Industrial Co., Ltd. Name (6152) Patent attorney Shigetaka Hino. Moth
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