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JP2003088808

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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 JP2003088808
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
vibration direction conversion horn in which vibration leakage due to the touch of a flange of a
Langevin type vibrator is eliminated.
[0002]
2. Description of the Related Art In a conventional high intensity ultrasonic wave applied
longitudinal oscillator, a booster is provided to a bolt-clamped Langevin type vibrator to increase
the vibration amplitude on the radiation surface, and a horn is connected to this booster in a
cascade connection. In this ultrasonic wave-applied longitudinal oscillator, it is often used in a
low frequency region of several tens of kHz where the amplitude and vibration power can be
relatively large.
[0003]
Accordingly, in this ultrasonic wave-applied longitudinal oscillator, the entire oscillator needs to
be elongated due to the increase in the wavelength due to the subconnection and the low
frequency, and the installation space of the device must be enlarged. However, there is a problem
that the size of the device is increased, the handling is inconvenient, and the operability is bad.
[0004]
SUMMARY OF THE INVENTION In the present invention, a piezoelectric element is formed into a
cylindrical block, a cylindrical portion having substantially the same diameter as the cylindrical
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block, and a thin tip formed by tilting at a predetermined angle from the cylindrical portion. A
Langevin-type vibrator held by a horn block comprising a horn portion and a vibration direction
converter to which the tip of the horn portion of the horn block of the Langeban vibrator is
attached, and the Lange-ban vibrator from the vibration direction converter A rear mass portion
slightly narrower than the vibration direction conversion portion in a direction orthogonal to the
horn portion of the mold vibrator and projected to a predetermined length, and predetermined
from the vibration direction conversion portion facing the rear mass portion A vibration direction
conversion horn comprising: a vibration velocity expanding horn which is inclined at an angle to
form a thin tip and is constituted by an expanding horn portion having the same width as the
rear mass portion; Serial same as the width of the enlarged horn portion between said enlarged
horn portion and the vibration direction conversion section is intended to provide a vibration
damping portion having a desired vertical width.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a Langevin-type
vibrator is used as a vibration source, this Langevin-type vibrator is resonated by 1⁄2 wavelength
over its entire length, and the tip of the Langeban-type vibrator is tapered. In order to expand the
vibration speed by forming a horn metal part and expanding the vibration speed, the vibration
speed expansion horn is provided in the horn part of this Langevin type vibrator, and the
ultrasonic vibration generated by the Langevin type vibrator is orthogonalized by the vibration
speed expanding horn It converts into the direction, and the vibration and speed of ultrasonic
wave are expanded and transmitted at the tip of the expansion horn part of the vibration speed
expansion horn, and the vibration buffer between the vibration direction conversion part of the
vibration speed expansion horn and the expansion horn part By providing the mounting portion,
the mounting space can be reduced, which is easy to use, and the generation of unnecessary
bending vibration of the Langevin type vibrator is prevented by the vibration absorbing portion. ,
There is no increase in impedance during vibration leakage and fixing by deflection of the
support flanges with the bending vibration to prevent displacement of the device due to the
bending vibration in the bending vibration horn block, it is possible to prevent the occurrence of
spurious.
[0006]
FIG. 1 is a perspective view of a vibration direction conversion horn according to an embodiment
of the present invention, and FIG. 2 is a side view of the vibration direction conversion horn of
FIG. , And a horn block 5 consisting of a cylindrical portion 5a having substantially the same
diameter as the cylindrical block 4 and a horn portion 5b having a tapered tip at a tangent angle
θ of the start of a predetermined taper curve from the cylindrical portion 5a. The cylindrical
portion 5a of the horn block 5 is provided with a support flange 5c, and the tip end of the horn
portion 5b of the horn block 5 is provided with the vibration direction conversion portion 6a of
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the vibration direction expanding horn 6 The vibration direction expanding horn 6 is provided
with a rear mass portion 6 b projecting from the vibration direction converting portion 6 a with a
width slightly narrower than the vibration direction converting portion 6 a in a direction
orthogonal to the central axis of the Langevin type vibrator 1. Furthermore, a vibration damping
portion 6d having a desired vertical width slightly narrower than the horizontal width of the
vibration direction changing portion 6a is provided in a portion facing the rear mass portion 6b
of the vibration direction changing portion 6a. An enlarged horn 6c is formed with a width
substantially the same as 6d and gradually narrowed at a tangent angle θ of the start of the
taper curve predetermined from the vibration damper 6d, and a rear mass 6b, a vibration
direction converter 6a, The lengths of the vibration damping portion 6 d and the expanding horn
portion 6 c are configured to have a half wavelength resonance length.
[0007]
In the vibration direction conversion horn of this embodiment configured as described above,
when an oscillation output from an oscillator (not shown) is applied from the terminals 2a and 3a
of the piezoelectric elements 2 and 3 of the Langevin type vibrator 1, the Langevin type vibrator
is The vibration velocity expanding horn 6 is configured to resonate at 1⁄2 wavelength at a
frequency substantially equal to that of the Langevin-type vibrator 1, and further, the vibration
velocity expanding horn 6 changes its vibration direction. Since the vibration absorbing portion
6d is provided between the portion 6a and the expanding horn 6c, generation of unnecessary
bending vibration of the Langevin type vibrator 1 is prevented, and vibration due to deflection of
the portion of the support flange 5c accompanying this bending vibration. It is possible to
prevent leakage and increase in impedance when the flange 5c is fixed, and bending of the horn
5b of the horn block 5 of the Langevin type vibrator 1 Displacement of the device by moving can
be prevented, further, it is possible to prevent the occurrence of spurious.
[0008]
As described above, in the vibration direction conversion horn of the present invention, a
Langevin-type vibrator is used as a vibration source, and the tip of the Langevin-type vibrator is
tapered to form a horn portion. To expand the vibration velocity, provide a vibration direction
converter on the horn of the Langevin-type vibrator, project the rear mass from the vibration
direction converter in the orthogonal direction, and vibrate the opposite mass of the rear mass
The expansion horn is projected through the buffer to form a vibration speed expansion horn,
and the ultrasonic vibration generated by the Langevin-type vibrator is converted into the
orthogonal direction by the vibration speed expansion horn to form the tip of the expansion
horn. The vibration and speed of ultrasonic waves generated by the Langevin type transducer are
expanded and transmitted, and the vibration damping portion is formed between the vibration
direction conversion portion and the magnifying horn portion, so the Langevin type transducer is
formed. The occurrence of unnecessary bending vibration is prevented, the vibration leakage due
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to the deflection of the support flange accompanying this bending vibration is prevented, the
impedance increase at the time of fixing the support flange is prevented, and the element by the
bending vibration of the horn of the Langevin type vibrator It has the advantages of preventing
misalignment, preventing generation of spurious, reducing the mounting space, and being
convenient to use.
[0009]
Brief description of the drawings
[0010]
1 is a perspective view of the vibration direction conversion horn of the embodiment of the
present invention.
[0011]
2 is a side view of the vibration direction conversion horn of FIG.
[0012]
Explanation of sign
[0013]
1 Langevin type vibrator 2, 3 piezoelectric element 4 cylindrical block 5 horn block 6 vibration
direction conversion horn
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