close

Вход

Забыли?

вход по аккаунту

?

JPH1157640

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH1157640
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
method of fixing an ultrasonic transducer fixed on a diaphragm through an adhesive.
[0002]
2. Description of the Related Art Generally, an ultrasonic cleaning apparatus is used which
transmits the vibration generated by an ultrasonic transducer connected to an ultrasonic
oscillator to a diaphragm, vibrates the entire diaphragm, and performs cleaning using this
vibration. Are known. The ultrasonic transducer used in this ultrasonic cleaning apparatus is
constantly vibrating on the vibrating plate, so it may be dropped off from the vibrating plate, and
conventionally, as shown in FIG. The stud bolt 31 is welded onto the diaphragm 30, the screw
hole 33 is formed in the bottom of the vibrator 32, and the vibrator 32 is screwed to the stud
bolt 31 and fixed with the adhesive 34. Since the process of welding the stat bolt 31 to the
diaphragm 30 and forming the screw hole 33 in the vibrator 32 is indispensable, the
manufacturing labor and process become complicated, and the cost can not be reduced, and only
the screw hole 33 portion There is a problem that the acoustic efficiency is reduced because the
bottom area of the ultrasonic transducer is reduced. However, as a result of improving the quality
of the adhesive and the bonding method, as shown in FIG. 6B, after the lower end of the
ultrasonic transducer 37 is embedded in the adhesive 36 mounted on the diaphragm 35 By
curing the adhesive 36, it is possible to ensure the same strength without the need for a stat bolt.
04-05-2019
1
[0003]
However, while being used for a long time, the holding power of the adhesive 36 is also reduced,
and as shown in FIG. 6C, the vibrator 37 drops out of the diaphragm 35. There is a possibility
that a reduction in acoustic efficiency or a short circuit caused by contact of the electrode 38 of
the vibrator with another vibrator may occur.
[0004]
An object of the present invention is to solve the above-mentioned problems, to increase the
fixing strength to a diaphragm with a simple structure, and to provide a method of fixing an
ultrasonic transducer which is less likely to drop out even in long-term use.
[0005]
In order to solve the above-mentioned problems, according to the method of fixing an ultrasonic
transducer according to the present invention, ultrasonic power is applied to an ultrasonic
transducer fixed on a vibrating plate with an adhesive interposed. In the ultrasonic cleaning
device for generating ultrasonic vibration and cleaning the cleaning material immersed in the
liquid in the cleaning tank by the ultrasonic vibration, wherein at least one of the lower
circumferential surfaces of the ultrasonic transducers is An annular groove is formed, and a
lower portion of the ultrasonic transducer is immersed in the adhesive so that the adhesive is
engaged with the annular groove.
[0006]
Further, an annular protrusion may be formed on the lower circumferential surface of the
ultrasonic transducer in place of the annular groove.
[0007]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an ultrasonic
cleaning apparatus to which an ultrasonic transducer according to the present invention is
applied. A plurality of ultrasonic transducers A fixed on the vibrating plate 4 from the
commercial power source to generate ultrasonic power corresponding to the resonance
frequency of the ultrasonic transducers. By connecting in parallel, the ultrasonic transducer A is
sealed by a cover 6 mounted on the diaphragm 4 so as not to be immersed in the liquid 3, and
ultrasonic power is applied to resonate the ultrasonic transducer. The entire vibrating plate 4 is
ultrasonically vibrated to clean the cleaning material 7 in the liquid 3.
04-05-2019
2
There is also a cleaning tank integrated type in which an ultrasonic transducer is directly
attached to the back side of the bottom plate of the cleaning tank and used.
[0008]
As shown in FIGS. 2 (a) and 2 (b), the ultrasonic transducer A is composed of a base member 10,
ring-shaped piezoelectric ceramics 11 and 12, electrodes 13 and 14, and a fixing member 15, as
shown in FIG. As shown in the exploded perspective view of 3, the base member 10 is made of
aluminum and formed substantially in the shape of a truncated cone, and a nonslip satin is
formed on the bottom surface 10a and the lower circumferential surface 10b by sandblasting,
and a satin is formed. One annular groove 16 is provided around the lower circumferential
surface 10b.
Further, a screw hole 17 is formed at the center of the upper surface of the base member 10, and
a bolt 18 is screwed into the screw hole 17. The bolt 18 is formed such that the upper end
thereof protrudes above the base member 10.
[0009]
The first electrode 13, the first piezoelectric ceramic 11, the second electrode 14, the second
ceramic 12, and the fixing member 15 are sequentially polymerized on the upper surface of the
base member 10 to screw the nut 19 to the bolt 18. Thereby, the first electrode 13, the first
piezoelectric ceramic 11, the second electrode 14, the second ceramic 12 and the fixing member
15 are fixed to the base member 10, and the ultrasonic transducer A can be formed.
[0010]
A Teflon tube 20 is interposed between the bolt 18 and the piezoelectric ceramics 11, 12 and the
electrodes 13, 14 so that the electrodes 13, 14 are not short circuited by the bolt 18.
[0011]
The base member 10 and the fixing member 15 are connected to each other via a bolt 18 and
are electrically connected to the first electrode 13.
04-05-2019
3
[0012]
Further, the first piezoelectric ceramic 11 and the second piezoelectric ceramic 12 are disposed
such that the positive electrodes face each other with the second electrode 14 interposed
therebetween, and the negative electrode of the first piezoelectric ceramic 11 corresponds to the
first electrode 13. The negative electrode of the second piezoelectric ceramic is electrically
connected to the first electrode 13 through the fixing member 15, the bolt 18 and the base
member 10.
[0013]
By applying ultrasonic power supplied from an ultrasonic oscillator between the first electrode
13 and the second electrode 14, when a positive voltage is applied to the second electrode 14,
the piezoelectric ceramic 11, Since 12 extends in the vertical direction and contracts in the
vertical direction when a negative voltage is applied to the second electrode 14, the expansion
and contraction is repeated in synchronization with the frequency of the applied ultrasonic
power.
[0014]
In the case of fixing the ultrasonic transducer A having the above configuration to the diaphragm
4, first, as shown in FIG. 4A, an epoxy-based thermosetting adhesive (hereinafter referred to as
an adhesive) on the diaphragm 4 Serve 21
Next, as shown in FIG. 4 (b), the bottom of the ultrasonic transducer A is pressed against the
diaphragm 4 so that the annular groove 16 formed in the base member 10 is inserted into the
adhesive 21.
The bottom of the ultrasonic transducer A sinks into the adhesive 21 while pushing back the
adhesive 21, and a part of the adhesive 21 enters the annular groove 16 and the ultrasonic
transducer A is reliably held by the adhesive 21. (Refer FIG.4 (c)).
[0015]
The ultrasonic transducer A is adhered to the diaphragm 4 with the adhesive 21 and at the same
time a part of the adhesive 21 is engaged with the annular groove 16, the adhesive 21 is cured
by heating at a predetermined temperature.
04-05-2019
4
[0016]
As the textured surface is formed on the bottom surface 10a and the lower circumferential
surface 10b of the base member 10 of the ultrasonic transducer A, and the annular groove 16 is
formed on the lower circumferential surface 10b, the adhesive 21 has a textured surface. Since it
is hardened in a state of biting into the annular groove 16, it does not come off from the adhesive
21 due to the vibration of the ultrasonic transducer A or an external force, and ultrasonic
vibration from the diaphragm 4 even in long-term use Child A is less likely to fall out.
[0017]
In the above-described ultrasonic transducer, one annular groove is formed in the base member.
However, the number of annular grooves is not limited to one, and a plurality of annular grooves
may be formed.
[0018]
Further, the annular groove does not necessarily have to be continuous, and may be formed as a
series of concave portions.
[0019]
Furthermore, as shown in FIGS. 5 (a) and 5 (b), an annular protrusion 22 is formed on the lower
circumferential surface of the base member 10, and after the annular protrusion 22 is immersed
in the adhesive 21, the adhesive 21 is added. The adhesive 21 and the annular projection 22 may
be engaged to be cured.
The annular projection may be formed by a series of projections.
[0020]
According to the invention of claim 1, by immersing the annular groove formed on the lower
circumferential surface of the ultrasonic transducer into the adhesive, the vibration is caused in
the state where the adhesive and the annular groove are engaged. Bonding strength to the plate
greatly improves bonding strength, and the ultrasonic transducer is less likely to come off from
the diaphragm, making it possible to securely fix the ultrasonic transducer on the diaphragm
while using a simple fixing method. And stable ultrasonic cleaning can be performed over a long
period of time.
04-05-2019
5
[0021]
According to the invention of claim 2, by immersing the annular projection formed on the lower
circumferential surface of the ultrasonic transducer in the adhesive, the bonding force between
the ultrasonic transducer and the adhesive is enhanced, and the ultrasonic transducer is formed.
Is less likely to fall off the diaphragm.
[0022]
Brief description of the drawings
[0023]
Fig. 1 An illustration of the ultrasonic cleaning device
[0024]
2 (a) and 2 (b) are front and plan views of the ultrasonic transducer according to the present
invention.
[0025]
Fig. 3 An exploded perspective view of the above ultrasonic transducer
[0026]
4 (a), (b) and (c) are a front view and a cross-sectional view of an essential part for explaining the
method of fixing the ultrasonic transducer to the diaphragm
[0027]
5 (a) and 5 (b) are a front view and a cross-sectional view of another part showing another
example of the method of fixing the ultrasonic transducer
[0028]
6 (a) and 6 (b) are explanatory views of a conventional ultrasonic transducer fixing method.
[0029]
04-05-2019
6
Explanation of sign
[0030]
DESCRIPTION OF SYMBOLS 4 Vibration plate 7 Washing | cleaning material 10 Base member 16
Annular groove 21 Adhesive agent A Ultrasonic transducer
04-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
14 Кб
Теги
jph1157640
1/--страниц
Пожаловаться на содержимое документа