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JPS51113592

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DESCRIPTION JPS51113592
'I + March 31, 050 414. + 許 1 IQ IQ name of invention ■ Japanese Patent Application LaidOpen No. 51-1135920 (1976) 10.6 Office internal reference number 682 right 5 + specification
1, name of invention Langevin type vibrator 1, name of invention Langevin type vibrator
# N / 〆))? 7-'Langevin type oscillators 讐 Ganus Φ! Sushi ■ (Naoshi Suzuki Masafumi () l or 1
person) [F] Japan Patent Office
3. Detailed Description of the Invention The present invention is intended to improve the
Langevin-type vibrator of the electroacoustic transducer. The object of the present invention is
relatively low for use in water. Ultrasound of frequency, for example 1-sKIIZ ultrasound. And
produce high efficiency and extremely high sound output. Providing a Langevin-type vibrator. It
is a piezoelectric electrostrictive element itself as a compression-plate. . Compression by a
tightening object made of bolts etc. It is a Langevin type vibrator formed into a resonance unit by
bonding a gold member, which is an additional mass at both terminals, to form an imaging
element. -Conventionally, when a Langevin type transducer can be built with a relatively low
frequency ultrasonic wave (e.g. 1 to a KHz), the total length is long and the weight is huge, so it is
a driving source. An electrostrictive element and an additional 'I! Cross section of metal material
that is tt. It is considered useful to make the product ratio extremely large (cross-sectional area of
electrostrictive element / cross-sectional area of metal base material). 1. · · · H · such a Langevintype vibrator to generate sound # out to some extent to (If is satisfied, but the transmission of a
large output by the quotient acoustic @ degree t-of the electrostrictive element There is a
problem because the cross-sectional area is small. One of them is that the electrostrictive element
itself is broken by 1 ° ThLn at the time of high-power transmission due to the generation of
high tensile stress. As is well known, the electrostrictive element has a characteristic of being
strong in compression and weak in tension peculiar to porcelain. . The other one is that the
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bonding points between the electrostrictive element and the gold-metal and electrostrictive
elements are separated due to the occurrence of high tensile stress EndPage: 1 stress during high
power transmission. From this point of view, there has conventionally been provided a Lange-Pan
type imaging moving member in which a strain element and an adhesive portion are subjected to
even-odd stress in advance. It maintains the target bond between the electrostrictive element and
the metal material by elastic bulging of the bolt cylinder by means of elastic deformation of the
bolt tube, such as an electrostrictive element @ and an adhesive, a pair of metal material as an
additional mass, and an additional mass. Therefore, it has a structure to connect a pair of four
gold materials to apply pressure to the electrostrictive element and the adhesive. 1D to 1st to
41st lc, in the form of the conventional embodiment, 1st letter, 1st letter, 1st letter, 1st letter, 1st
letter, 1st letter, 1st letter, 1st letter. Bonded by 4C, (-1 consideration agent 4a to its both ends.
The metal material 2 ° 3 <5 @ that is additional protection by dbK. /′する。 Preelectrostrictive 7-1a, 1b and adhesive 4α, 4D, 4C and metal material such as 1 do not pull each
other 4 when sending high power 1. Spring washer 6 bolt 5 bolt 5 Keep each '0 mechanical bond
by 1.
To form an integral Langevin type transducer. In the operation, power is applied by the lead
wires 7α, 7b, 7C, electrostriction, electro-mechanical conversion is performed by the elements
1α, 1b, imaging is transmitted to the metal material, and acoustic radiation 8 is generated. The
prior art methods as described above have the following disadvantages. The first is that the
performance is generally understood only when the parts are assembled together, and an
intermediate step (for example, only adhesion of the electrostrictive elements to each other does
not add compression □ force I / -1 96 Mostly the performance of the electrostrictive element
itself. It is difficult to predict the final performance in. In the case of 9 defects of parts, such as
damage to the electrostrictive element, processing errors or assembly of metal material. ・ If it is
not possible to make an adhesion, a mistake in tightening, etc. in the end, it will be undetectable.
Unfortunately, one of them is roughly 1. sex. If a performance failure occurs, all components
become defective. In particular, in the case of using a large number of expensive electrostrictive
elements, in order to realize high efficiency acoustically. It is necessary for gold practice
materials and assembly, and the loss, including the effort, -5 damage is notable. If you need a
vibrator of various performance, it is very troublesome. Second, the electrostrictive element and
the adhesive are less likely to have a uniform compression force. If you get a low frequency
Langevin type transducer at @, the metal material is CIBecause of large CI size and inevitably
long bolts and jigs for bonding and compression of parts too large, the dimensional accuracy of
each part is degraded, and the concentration of stress on the compressed part is not good. Since
the head of the bolt is exposed at the end of the metal material in the case of bolting with the h0
third, water, moisture, etc. penetrate into the inside of the electrostrictive element from between
the metal material and the bolt (1, electrical insulation failure And the like. Fourth, in the case of
an extremely low mechanical q "shooting type", the metal material on the sound emitting side has
a low density and thin body force; either it is used, or in that case it is not metal material by
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bolting. A uniform stress is applied, and the metallic material produces vibrational disturbance
tt'6 on the acoustic radiation surface during vibration, the power density of the acoustic radiation
surface becomes uneven during transmission, and a cavity phenomenon tends to occur. -Forced
water load is not uniform on the acoustic radiation surface. The fifth connects low density metal
and bolt. When this happens, the metal material will creep and compression 1. For
electrostrictive elements and adhesives, the problem of compressive stress relaxation arises. The
sixth has a weight of about 2 o to 3 o in this type of Lange-Pan oscillator, and 30.0 pieces of 1- to
1 set of 1.times.
And so on. In the case of assembly, however, a large ji1 bearing and a clamping jig are required,
and a great deal of labor is required in transportation and the like. Above. There is a problem like
the first to the 61th line, and the degree of the problem is a low mechanical Q, a very low
frequency (for example, 1 to 4 KHz), and a large and small force transmission wave of the ability
of the Lange-pan. In the case of a mold oscillator. It can be said that it is remarkable. □ The
present invention provides a compression plate for fully compressing the above-mentioned
conventional defects as well as the pre-electrostrictive 4 and adhesive itself, and compresses it
with a bolt etc. to form a vibrating element 11, with an added mass at both ends Bond a certain
metal material 1. A Langevin type transducer that solves by making a sympathy unit and
generates an extremely high sound output with high efficiency at a low frequency is in the place
of W. Hereinafter, the present invention will be described in detail by way of examples. In FIG. 5
and FIG. 6, a plurality of 1 1⁄4 18 pieces of EndPage: 2 are electrostrictive elements 11α and
11b made of silver lightning at both ends and made of piezoelectric ceramic with poles baked,
and in the case of multiple use. There is an adhesive or a soft gold plate 14C between each other,
and there are also an adhesive or a soft metal plate 14α, 14 / l-· · at both ends of the lightning
and strain elements j1a and 11b, and a compression plate 19q. 19b is thrown snow 1 by spring
washer 16 and bolt 15 they squeeze-srL 振 # l Takako and (7 4 4). Compression plate 19σ, 191!
(d electrostrictive elements 11α, 11b and adhesive coated soft metal plates 14a, 14C 14C for
applying a compressive force evenly to the cross section, material 6, metal, synthetic resin, glass,
porcelain It is either. As described above (the first vibration and the second blade, the metal
material 12.13 is spread or screwed with the adhesive 14 d or 14 e or by a screw or the like to
form a resonance unit. Thus, the Langevin transducer of the present invention is spared. Metal
material 12.1! 1 is an added mass which is not apt to be lacking in the configuration of the U /
Span type resonator, so it is necessary to acoustically select R, and in the case of this
embodiment, it is cylindrical. However, the shape is particularly limited in shape, and it may be a
cone, 19 may be a polygon, and may face the compression plates 19α, 19b. It is necessary to
have a surface that can be tightly coupled. According to the above-mentioned structure, electric
power is supplied from the electrode lead wires 17α, 17b and 17c, and electricity is supplied to
the electrostrictive elements 11α and 11h. -Mechanical conversion is performed, and through
the compression plates 19rL and 19b, the metallic material 12VC imaging motion is transmitted,
and the acoustic radiation 18 is a metallic material 12!
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'i Follow-up to the i1 area forest of the electrostrictive element-so that the transmission of the
imaging motion is received and transmitted on the entire surface of the compression plate 19a,
not the transmission of the imaging motion, the acoustic radiation, the surface Another
embodiment of the present invention which provides uniform shooting is shown in FIG. 71st
threshold. Is the first embodiment of FIG. 5, @ 6 and the structure and action. & 'I Similar 1. The
numbers are the same. . In the first embodiment, one tree of electrostrictive elements is used.
11α, 11b, contact-if agent 14rL, 14b, 14r? The imaging element consisting of a 1 'E reduced
plate 19α, 3 ° 19h-h, etc. was compressed -1, but FIG. 7 of another embodiment shows an
electrostrictive element 11σ, 11b and an adhesive or a soft metal plate 14α. 146, 14CK, to
apply compressive stress more uniform than in the first embodiment, and to arrange a plurality
of bolts to achieve desired FfL. Another embodiment of the present invention is shown in FIGS.
The fifth of the first embodiment also applies to 48 to 10'121. The structure and function are
similar to those of 6-m 1. Therefore, the “numbers” are the same as shown in Table 1, and the
new and ha elements are represented by l numbers. As shown in FIGS. 8A to 1A, the vibration
element is one in which a large number of electrostrictive elements 11 are used to obtain an
acoustically high driving force. Plates 19σ, 19b. There is a spring, 16 from the spring washer 16
and the bolt 15, and an electric distortion element by tightening the bolt 15. 11i? And
compression is applied to the bond. Vibrancy. The two ends of the child are bonded or screwed
with the metal members 12 and 13 to form a resonance unit, thereby forming the Langevin type
vibrator of the present invention. Metal material. 12 is an area that is significantly more friendly
than the @i product of the 10% distortion element 11 in order to significantly lower the parasitic
frequency and to prevent the cavity phenomenon? It is necessary to make the thickness with
respect to the diameter as thin as possible 1-1 and the density of the material is low because it is
necessary to equalize the amount of isometric measurement seen from the electrostrictive
element 11 which is a drive source in order to reduce mechanical stress. The above configuration
makes this Langevin type transducer. Relay terminal 21α, 21b [@: electric power is applied from
the electrode lead wires 17α, 17b], 'electro-mechanical conversion is performed by the
electrostrictive element 111C, metal material through the electric insulating plate 2o α, the
compression plate 19a A 12 Km motion is transmitted n1 acoustic radiation 18. In this way,
Lansch is capable of high-power transmission with low mechanical Q and high efficiency at
relatively low ultrasonic frequencies (for example, 1 to sKHz).
You can get a bread-type touching child. The electrostrictive element and back agent of the
Langevin type | mold vibrator of this invention are shown to FIGS. 11-16. Fig. 8 shows an
example of another variant of a soft metal plate or an imaging element such as a compression
plate car. Each of the electrostrictive elements 11a, 1 '[+ and an adhesive or a soft metal plate
14α, 14b. j4c is the same as the lIR composition of the vibrator element shown in FIGS. 5 and 6
of the first embodiment, but the compression method is different, and both use bolts. ていない。
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That is, in FIGS. 11 and 12, the compression plates 19a and 19b have a diameter smaller than
the inner diameter of the electrostrictive elements 111Z and 11b, respectively. EndPage: 311A
and adhesive 14α, 1-4b, 141? Is a compression force. Sixteenth and 141st chestnuts are
compression plates 19a and 19b '. ! (7, attach a relatively soft elastic ring ring 22 with rubber
calculat- es, and mix in fluid-into electrostrictive elements 11a and 11b) Prevent and compress
plate 19α. 19b It is a thing of 1t that prevents the transmission of mutual impression. The
15.4π 161 bacteria are compression plates 19α and 19b that are electrostrictive elements
11α. It has a tongue screw portion 24 which is larger than the outer diameter of 11b, and by
tightening the screw portion 524, the electrostrictive element 114.11b and the # layer agent
14α, 146.14 CVC compressed and squeezed are added. である。 As described above, according
to the present invention, the large size of the conventional lansie pan-type scissors shown in
FIGS. For tensile failure of the electrode elements ia, 1bb and adhesive 4a, -4b, 4C by power
transmission. The electrostrictive elements 11a, 11b and the adhesive or soft metal plates 14a,
14b, 14c and the compression plates 19σ, 19b are bolt 15 or compression plates as shown in
FIG. 19α, 19b owing to the application of a compressive force to the solution (7, Langeban type
moving element structure 14K-i at its both ends-no metal material attached to the missing layer)
Thus, a resonant unit is formed, high efficiency at extremely low frequency, high power
transmission is possible, and a Langevin-type vibrator with low mechanical Q is obtained.
effective. The first is by the bolt 15 or the compression plate 19 / Z, 19 / l itself by the
electrostrictive element 11i, 11b-% and the adhesive 14cL, 14h, 14 '' (5 compression plates 19α,
19D // provided). Compression break addition, vibration and moving element and 1.
Performance, I. 12, the metal material 12.13i throws ta +, compression 1. on both ends of the
tensioning element. After fc, generally final confirmation. If you f By adhesion of t′′14
material 12.15. There is an element C1 “1” with no variation in performance, and the process
of 1 in 1 manager. [Oh, l / '1 gives you an idea of the final performance. このことは。 A number
of defects are prevented in advance. And, @ @ The basic shape of the metal material of the
appropriate shape and material by the performance of @ @ ま は ず れ screwing shift 'if the final
performance of the final performance-/ / 1% limit can be limited, and resonance It is possible to
change the frequency, the directivity, and the photographing motion k ". On the other hand, the
other advantage of configuring the imaging element is to apply a compressive force to the
electric element, resulting in high power. It is extremely advantageous unlike the fact that
compression force can not be applied if a large scale, heavy metal 4 material as in the past is
used to determine whether the motion feeling test is performed by the image pickup device
alone. . By using the 214th compression plate 19rL, 19bl, it is extremely short compared to the
conventional type with 15 bolts, and there is no need to perform adhesion, compression, etc.
including conventional metal materials at the same time-adhesion, child The wire jig is small, the
dimensional accuracy is the same as above 1-1-electrostrictive element 11a, 11h, and the layer
agent tohi add a uniform compressive force to the soft gold parts 8 plates 14α, 14.6 and 14c. Or
^, the same quality as the conventional one. Third, since the head of the bolt 15 is completely
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hidden by the metal material 13, water is externally supplied to the inside of the electrostrictive
elements 11α and 11D. And moisture can not penetrate, and electrical insulation failure occurs
due to water or moisture. にくい。 Further, as shown in the embodiment of FIGS. 13 to 16, if a
collar or the like is provided on the outside of the electrode element, water, moisture and the like
can be further prevented out of the electrode elements 11α and 11b. Electrode element 11α.
Spaces of very small volume 25 vc '+ l [2t] which can be used to prevent breakdown of the inside
and the outside of the chamber 117 can easily be filled with inert gas or dry air. The fourth is
metal 12 machine. Low density and thin thickness to lower mechanical Q. こ。 Because of this,
the conventional Langevin type imaging -7-is directly bolted to the metal material 2, and the
acoustic radiation surface of the metal material 2 is disorganized due to the influence of the bolt.
Since vibration transmission does not occur on the metal material 12 by the entire end face of
the compression plates 19α and 19b, the imaging movement of the sound / echo radiation
surface becomes uniform, and the cavity force phenomenon occurs because the small power
density is uniform at the time of transmission. << 1. ・ The output limit is extended. The literary
load is the sound emission surface.
It is possible to obtain uniform performance and obtain theoretical performance. The fifth uses
all the low density material for the metal material 2 1. In the case where the mechanical strength
is low, creep is likely to occur in the screw portion of the metal member 2 by bolt connection
conventionally, and there is no need to provide a screw for the electrostrictive element 1α and
ivc stress relief, and high pressure is applied to the compression plates 19α and 19b. It is
possible to use an extremely rigid material with density, EndPage: 4, and there is no problem of
stress relaxation of the electrostrictive element 11 α, 111) due to creep buildup. In addition, it
has a large weight (about 10 to 4) and a large shape metal, which is related to the problem.
Machining of material 12.15 saves machining of screw holes, bolt through holes, etc. and weighs
6th 6 is capable of contacting 4-h3 with metal material 12.15 + d final assembly jig. 'f, s% Very
large adhesive bond and tightening jig (in the case of the present invention, go in the state of
tightening and peeling @ element) as in the past Or metal 12. ・ 15 is a contact-dust A, with
minimal handling in the rt, fc, state. It has the effect of requiring no effort and equipment. The
advantage of the present invention is that the efficiency is high at very low frequency (for
example, 1 to a KHz) 11, high power transmission is possible, and the mechanical Q is low. In the
case of the oscillator second. い。
4. Brief description of the drawings. FIG. 1 is a longitudinal sectional view showing the basic form
of a conventional bolted 6-inch flange type flanged rotor, FIG. 2 is a longitudinal sectional view
showing a modification of 1 m, FIG. The figure is a cross-sectional arrow view divided into line -4A in FIG. 1, FIG. 4 is a cross-section arrow line view on line A-A in FIG. 2 (figure 2), and FIG. Fig.
61d is a longitudinal sectional view showing a car shape of the embodiment of the imaging lens,
Fig. 61d is an exploded view of a partially cropped surface in Fig. 5, and Fig. 7 is a partial
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sectional view showing a modification of Fig. FIG. 8 is a longitudinal sectional view showing an
embodiment of the Langevin-type imaging motor according to the present invention, FIG. 8 is a
cross-sectional view taken along the line A-A of FIG. In the B-B edge of Figure 5? 11 is a
longitudinal sectional view of an imaging element which is a part of the Langevin-type vibrator
according to the present invention, FIG. 2I light A cross-sectional arrow view taken on line A-A in
FIG. 13 is a longitudinal sectional view showing a modification of FIG. 11, FIG. + 1-A crosssectional view taken along the line AA in FIG. FIG. 16 is another longitudinal sectional view
showing another modified example of FIG. Is a cross-sectional arrow view taken along the line AA in FIG. Description of symbols 1 (IZ, b), 11 (IZ, 6): electrostrictive elements 2.3.12.13 = metal
materials 4 (a, tr, c "), 14 (a, b, 'c): Contact agent “lP” is a soft metal plate 5.15: bolt 7 (α, b,)),
17 (/ Z, b, 1?): Lead wire 1 q (rt, b): compression plate 20 Crt, o) : Electrical insulation plate 22:
Containment ring agent patent attorney thin 1) Toshiyuki. ? 1 Figure 1 ′ ′ 3 Figure 士
Shoulder 7 L, 7 End EndPage: 5 years 1 year 6 Fang old hot 8 N years old? 藺 + Io play 11 11 @
doo + llil attached 111's 1 ・ 1 record τ l) llj fine 111IA (2), 4If 111 (the duty 4.). I) 111 (1) h 1,
1 deprivation 1, criminal book summer f 5 Inventors other than the above, patent applicant or
agent inventor EndPage: 6
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