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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an example of a
typical ultrasonic wave transmission tool, in which 10 is a base substrate, 11 is a transducer -112
a resonant plate, and 13 is a radiation tool. FIG. 2 shows cross-sectional views in the case where a
fold is provided to the radiating device of an example of the present invention. Correction 53.3.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a
radiation device which improves the spurious characteristics of an ultrasonic wave transmission
device. Conventionally, research in the audible band has many sources. For example, Harry F,
Modern5oundReprodu-ctionv by 01son, or AcoustlcalEnglneer-King of the same author.
According to this II fee, various things are described as the shape of the radiation tool (cone in
this book), but all of them have an oval or conical shape or a directivity. On the other hand, the
crimped cone type is an ex- ternal type or the like, and can not be provided as a material for
resonating the emission odor itself intended by the present invention. J J, j table E 1 On the other
hand, in the ultrasound band, see patent application publication No. 37- + 455 or Japanese
Patent Publication No. 47-36419, etc. 1 and so on. Radiation tool. Large size, simple. . Radiation
tool. The angle k degree is described, and the form structure is completely untouched. The
requirement for the electrical characteristics of the ultrasonic wave transmitter 1 is to expand the
width of the usable frequency band − to diversify the transmission 1 and 4. Ijl · 1 However
Nacala, there is Naru very serious problem when [to produce a wide bandwidth ultrasound
transmission member. Because the band is wide, it is a defect rate due to the spurious that the
occurrence rate becomes high. A cross-sectional view of a representative ultrasonic wave
transmitter is shown in FIG. The radiation tool 13 was mounted on the upper surface of the
vibration base consisting of the transducer 11 made of ceramic and the resonance plate 12 on
the base substrate 10. The electrical characteristics of this ultrasonic wave transmission tool are
as shown by the curve 8 in FIG. 3, which is normal, but when the production line is actually
flowed, it is shown by a broken line in the intended use band W, Many spurious S occur. The
cause of this problem is that the C characteristic of the ultrasonic wave transmitter which does
not wear the radiation sheet 13 is indicated by a dotted line as shown by the dotted line 11 and it
can be determined that it is attributed to the technology of the radiator and its mounting 11・
When 4 general radiation tools are viewed from the front, the shape is circular and 2A ( 6 □, t
6). Assuming that the radiation tool is a disk and the mode of its vibration is simulated assuming
that the radiation tool is 1.6 °, it is assumed that the node 21 as shown in FIG. Be Of these, 25
vibration modes with three nodal diameters, 28 ul diameters consisting of two 8-diameter and
nodal circles, and 28 nodal circles j, etc. Because the distance between the face centers of the
punctuation parts in antiphase in the same plane is the same, ....
There are no more than eight C's that cause a wide range of media to be vibrated (in other words,
excited). Therefore, if the characteristic is J at a single pressure level as an ultrasonic wave
transmission tool, the above-mentioned spurious S 'will be obtained. P direction. 1S) 4). ). Yo, 8
board 3. Yua, Oh, I'm 8. In fact, since the central part is driven, the nodes are dotted lines and
occur on the -i sphere. The point completely different from a general speaker cone (described
above) is that the radiator itself is resonated. That is, in a general speaker cone; it is desirable to
make the phase be the same phase on the plane as in FIG. 2 without causing a local resonance.
The emitting tool is to have itself taken as 21.22 or its higher vibration mode. It is a feature of
the present invention to promote resonance of this mode and to suppress other modes. An
example of the specific means is as shown in FIG. 4, i.e., a letter mark, a cheek showing a 499
[deg.] Cross section, providing at least one strand concentrically, and the like. The ultrasonic
transmitter using the radiator of this structure does not generate spurious, so the production
yield is increased and the industrially has an llh value. 1-〇Funny description 4 and lvI paper of
the drawing. Fig. 1 shows an example of a typical ultrasonic wave transmitter in a cross-sectional
view. The river is a base, 11 is a transducer -112 is a joint officer. , 13 is a radiation tool. FIG. 2
respectively shows a cross-sectional view of a molten metal in which a fold is provided to the
radiator of an example of the present invention Y. ,) Utility model 禄 出 頬 2 日 @ 燭 燭 燭 燭 ′
′ ′ ′ ′ ′ ′ ′: req req req req req ° ° ° °! 02122Q 串) ■ ÷ ■ · · · · · 21i 2 728 Figure
2 Yoshiharu Taniguchi 5 is 86,415 mouth Yoshime 1C. = = Procedure prosecution Showa March
1, 2001 Patent Office Secretary 1 display of the case Showa prison year utility model registration
request No. 161328 2, the name of the device Person who makes a correction to the structure of
ultrasonic transmission tool Relationship with the case Utility model registration applicant Nature
place Tottori type 247 Iwakura address Tani 7 + 27 Ha I + name Yoshiharu Taniguchi 4, date of
the correction instruction February a day 5 of the Showa year of the year, the target statement of
the correction 6, the contents of the correction Street, ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 4
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