close

Вход

Забыли?

вход по аккаунту

?

JP2006247130

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 JP2006247130
PROBLEM TO BE SOLVED: To prevent deterioration of image quality of an ultrasonic image.
SOLUTION: An ultrasonic transducer array 10 in which a plurality of ultrasonic transducers 12
are arranged at a tip 2a of an ultrasonic probe 2 and an FPC 30 is connected to electrodes 42a
and 42b of the ultrasonic transducers 12, A flexible sheet 22 to which the transducer array 10 is
bonded, and a pedestal 11 having a curved surface shape and to which the flexible sheet 22 is
attached are disposed. The positioning pin 31 is provided on the pedestal 11, the positioning
hole 32 is provided on the flexible sheet 22, and when the flexible sheet 22 is attached to the
pedestal 11, the positioning pin 31 is fitted into the positioning hole 32 to obtain flexibility.
Positioning of the seat 22 and the pedestal 11 is performed. There is no possibility of
displacement of the ultrasonic transducer 12 and deterioration of the image quality of the
ultrasonic image can be prevented. [Selected figure] Figure 3
ULTRASONIC PROBE, AND METHOD FOR MANUFACTURING ULTRASONIC PROBE
[0001]
The present invention relates to an ultrasonic probe provided with an ultrasonic transducer for
irradiating an ultrasonic wave to a required part of a living body and receiving an echo signal
from the living body, and a method of manufacturing the same.
[0002]
BACKGROUND In recent years, medical diagnosis using ultrasonic images has been put to
practical use in the medical field.
04-05-2019
1
An ultrasonic image is generated by irradiating an ultrasonic wave to a required part of a living
body from an ultrasonic probe and electrically detecting an echo signal from the living body with
an ultrasonic observation device connected via the ultrasonic probe and a connector. can get. As
a driving method of the ultrasonic probe, an electronic scan scanning method is known in which
a plurality of ultrasonic transducers for transmitting and receiving ultrasonic waves are disposed
and an ultrasonic transducer to be driven is selectively switched by an electronic switch or the
like.
[0003]
An electronic scan type ultrasonic probe includes a convex electronic scanning type in which a
plurality of (for example, 94 to 128) ultrasonic transducers are arranged in a fan shape at the tip
of the probe. In addition, there is a radial electronic scanning system in which a plurality of (for
example, 360) ultrasonic transducers are disposed on the outer periphery of the tip of the probe.
Further, among these systems, they are classified into one-dimensional array type and twodimensional array type according to the arrangement of ultrasonic transducers.
[0004]
As a method of manufacturing a one-dimensional array type ultrasonic transducer, as disclosed
in, for example, FIG. 17 of Patent Document 1, a flexible wiring member (FPC; Flexible Printed
Circuit) is connected to an end portion of an electrode. A method is proposed in which a wafer of
an ultrasonic transducer is bonded to a flexible backing material, the wafer is diced into a
predetermined size, and then the backing material is curved and attached to a bowl-like pedestal
(see Patent Document 1) It is done. JP-A-8-89505
[0005]
However, in the technique described in Patent Document 1, when the backing material is
attached to the base, the array pitch of the ultrasonic transducers is shifted due to the expansion
and contraction of the FPC, which causes the image quality of the ultrasonic image to be
degraded. There was a problem.
[0006]
04-05-2019
2
The present invention has been made in view of the above problems, and an object of the present
invention is to provide an ultrasonic probe capable of preventing deterioration of the image
quality of an ultrasonic image, and a method of manufacturing the ultrasonic probe.
[0007]
In order to achieve the above object, according to the present invention, an ultrasonic transducer
array in which a plurality of ultrasonic transducers are arranged, and a flexible wiring member is
connected to electrodes of the ultrasonic transducers, and an ultrasonic transducer array In an
ultrasonic probe having a joined flexible sheet and a pedestal having a curved surface shape and
having the flexible sheet attached thereto disposed at the tip, the flexible sheet and the pedestal
may be When affixing a flexible sheet to the pedestal, a positioning portion for positioning the
flexible sheet and the pedestal is provided.
[0008]
The positioning portion preferably includes a convex portion provided on one of the flexible
sheet or the pedestal, and a concave portion provided on the other and in which the convex
portion is fitted; It is preferable that the part is provided so as to be removable from the flexible
sheet or the base after the flexible sheet is attached to the base.
[0009]
Further, according to the present invention, an ultrasonic transducer array is formed by
arranging a plurality of ultrasonic transducers, and an ultrasonic transducer array is connected
to an ultrasonic transducer array in which a flexible wiring member is connected to the
electrodes of the ultrasonic transducers. In a method of manufacturing an ultrasonic probe
having a sheet and a pedestal to which the flexible sheet is attached and having a sheet and a
curved surface, when attaching the flexible sheet to the pedestal, The flexible sheet and the
pedestal may be positioned by the flexible sheet and a positioning unit provided on the pedestal.
[0010]
In addition, it is preferable to comprise the said positioning part from the convex part provided in
one of the said flexible sheet or the said pedestals, and the other provided in the other and in
which the said convex part is engage | inserted, and the said flexible Preferably, the convex
portion is removed from the flexible sheet or the base after the elastic sheet is attached to the
base.
[0011]
04-05-2019
3
According to the ultrasonic probe and the method of manufacturing the ultrasonic probe of the
present invention, when the positioning portion is provided on the flexible sheet and the base,
and the flexible sheet is attached to the base, the positioning portion is flexible Since the sheet
and the pedestal are positioned, there is no possibility of displacement of the ultrasonic
transducer.
Therefore, the deterioration of the image quality of the ultrasonic image can be prevented.
[0012]
In FIGS. 1 and 2, an ultrasonic transducer array 10 is disposed at the tip 2a of an ultrasonic
probe 2 to which the present invention is applied.
The ultrasonic transducer array 10 employs a so-called convex electronic scanning system in
which a plurality of ultrasonic transducers 12 are arranged in a one-dimensional array on a
pedestal 11 formed in a bowl shape.
[0013]
An imaging device 16 provided with an objective optical system 14 for taking in image light of an
observation site in a living body and a CCD 15 for imaging the image light and outputting an
imaging signal on the upper part of the sheath 13 connected to the tip 2a. And a channel 18 for
puncture needle through which the puncture needle 17 is inserted.
In the lower part of the sheath 13, an array wiring cable 19 and an imaging device wiring cable
20 for electrically connecting an ultrasonic observation device (not shown), the ultrasonic
transducer array 10 and the imaging device 16 are as follows: It is inserted so as to sandwich the
puncture needle channel 18.
[0014]
04-05-2019
4
The pedestal 11 is placed on the base 21 of the tip 2a.
The pedestal 11 is made of a rigid material such as hard rubber, and an ultrasonic attenuation
material (ferrite, ceramic or the like) is added as necessary.
Although not illustrated, the base material 21 is connected to an FPC 30 described later, and a
connector in which wiring is drawn from the array wiring cable 19 is disposed.
[0015]
The ultrasonic transducer array 10 is bonded to a flexible sheet 22, and is attached to the
pedestal 11 via the flexible sheet 22.
Although not shown in the drawing for the purpose of avoiding complication, the gap between
the ultrasonic transducers 12 is filled with a filler made of epoxy resin. In addition, on the
ultrasonic transducer array 10, an acoustic lens made of silicon resin or the like and focusing
ultrasonic waves emitted from the ultrasonic transducer array 10 toward an observation site in
the living body is attached.
[0016]
In FIG. 3, a sheet-like flexible wiring member (FPC) 30 is drawn downward at both ends of the
flexible sheet 22. In the FPC 30, conductive wires having conductive patterns arranged at a
predetermined pitch are integrally formed in advance by etching on a flexible resin substrate.
The FPC 30 is electrically connected to the individual electrode 42 a and the common electrode
42 b (see FIG. 4) of the ultrasonic transducer 12 by soldering or the like.
[0017]
Positioning pins 31 are provided on both ends of the surface of the pedestal 11. The positioning
pins 31 are arranged at equal intervals, as many as the number of ultrasonic transducers 12. On
04-05-2019
5
the other hand, positioning holes 32 are provided at both ends of the flexible sheet 22
corresponding to the positions of the positioning pins 31. When the flexible sheet 22 is attached
to the pedestal 11, the positioning pin 31 is fitted into the positioning hole 32. Thereby, the
flexible sheet 22 and the pedestal 11 are positioned.
[0018]
In FIG. 4, the ultrasonic transducer 12 is composed of a piezoelectric element 40 made of a thin
film of PZT (lead zirconate titanate) and an acoustic matching layer 41 made of epoxy resin in
this order from the flexible sheet 22 side. Is sandwiched between the individual electrode 42a
and the common electrode 42b.
[0019]
The individual electrodes 42 a are connected to the transmission / reception switching circuit 43
in the ultrasonic observation device via the aforementioned FPC 30, connector, and wiring cable
19 for array.
On the other hand, the common electrode 42b is connected to the ground via the FPC 30 and the
connector.
[0020]
The transmission / reception switching circuit 43 performs transmission / reception switching of
ultrasonic waves by the ultrasonic transducer 12 at predetermined time intervals. The pulse
generation circuit 44 and the voltage measurement circuit 45 are connected to the transmission
/ reception switching circuit 43. The pulse generation circuit 44 applies a pulse voltage to the
piezoelectric element 40 when generating ultrasonic waves from the ultrasonic transducer 12
(during transmission of ultrasonic waves). Thereby, the ultrasonic transducer 12 generates an
ultrasonic wave having a predetermined frequency.
[0021]
The voltage measurement circuit 45 measures a voltage generated in the piezoelectric element
04-05-2019
6
40 when an echo signal from a living body is received by the ultrasonic transducer 12 (at the
time of receiving an ultrasonic wave). The voltage measurement circuit 45 transmits this
measurement result to the controller 46. The controller 46 converts the measurement result
transmitted from the voltage measurement circuit 45 into an ultrasonic image and causes the
monitor 47 to display this.
[0022]
When acquiring an ultrasonic image in the living body, the insertion portion of the ultrasonic
probe 2 is inserted into the living body, and while the optical image acquired by the imaging
device 16 is observed by the endoscope monitor, the in-vivo The required part is searched. Then,
when the distal end 2a reaches a required part in the living body and an instruction to acquire an
ultrasonic image is given, the transmission / reception switching circuit 43 switches the
transmission / reception of the ultrasonic wave of the ultrasonic transducer 12 from the pulse
generation circuit 44 By the application of the pulse voltage, an ultrasonic wave is emitted from
the ultrasonic transducer 12 and the ultrasonic wave is scanned on the living body.
[0023]
An echo signal from a living body is received by the ultrasonic transducer 12, and a voltage
measurement circuit 45 measures a voltage generated in the piezoelectric element 40. The
measurement results of the voltage measurement circuit 45 are transmitted to the controller 46
and converted into an ultrasonic image by the controller 46. The converted ultrasound image is
displayed on the monitor 47. In addition, while observing an optical image or an ultrasonic
image, the puncture needle 17 is operated as needed, and a required part in the living body is
collected.
[0024]
Next, the procedure for producing the ultrasonic probe 2 having the above configuration will be
described. First, the FPC 30 is connected to the individual electrode 42 a and the common
electrode 42 b of the wafer of the ultrasonic transducer 12 by soldering or the like. The wafer is
then bonded onto the flexible sheet 22.
04-05-2019
7
[0025]
After bonding the wafer of the ultrasonic transducer 12 on the flexible sheet 22, the wafer is
diced into a one-dimensional array. Then, the filler is filled in the gap between the ultrasonic
transducers 12. Thus, the ultrasonic transducer array 10 is formed on the flexible sheet 22.
[0026]
Thereafter, the flexible sheet 22 is curved according to the curved surface shape of the pedestal
11, the positioning pin 31 is fitted into the positioning hole 32, and the flexible sheet 22 and the
pedestal 11 are positioned while the flexible sheet 22 is positioned. 22 is attached to the pedestal
11. Finally, an acoustic lens is attached onto the ultrasonic transducer array 10, the pedestal 11
is adhered onto the substrate 21, and the FPC 30 is inserted into the connector to complete the
ultrasonic probe 2.
[0027]
As described above in detail, when the positioning pin 31 is provided on the base 11, the
positioning hole 32 is provided on the flexible sheet 22, and the flexible sheet 22 is attached to
the base 11, the positioning pin 31 is used as the positioning hole 32. Since the flexible sheet 22
and the pedestal 11 are positioned by fitting, there is no possibility that the positional
displacement of the ultrasonic transducer 12 occurs. Therefore, the deterioration of the image
quality of the ultrasonic image can be prevented.
[0028]
In the embodiment described above, the positioning pin 31 and the positioning hole 32 are
integrally provided on the pedestal 11 and the flexible sheet 22. However, as shown in FIG. After
being attached to the pedestal 51, the portion provided with the positioning pin 52 and the
positioning hole 53 may be removed.
[0029]
Both ends of the pedestal 51 shown in FIG. 5 where the positioning pins 52 are provided are
04-05-2019
8
projected outward, and a groove 54 into which the FPC 30 is inserted is formed inside the
overhanging part.
On the other hand, both ends of the flexible sheet 50 are also projected to the outside like the
pedestal 51, and positioning holes 53 corresponding to the positioning pins 52 are provided in
the projected part. The portions of the flexible sheet 50 and the pedestal 51 projected to the
outside are separated from the pedestal 50 and the flexible sheet 51 by a cutter or the like after
the flexible sheet 50 is attached to the pedestal 51. With such a configuration, it is possible to
easily remove positioning pins and positioning holes that are unnecessary at the product level, so
that the appearance of the product is improved and space saving can be realized.
[0030]
Further, the jig 60 shown in FIG. 6 may be used in combination with the flexible sheet 50 shown
in FIG. The jig 60 is formed with a notch 62 in which the pedestal 61 is placed, and positioning
pins 63 are provided at both ends. In this case, it is not necessary to provide the positioning pins
on the pedestal, and it is possible to reduce the time and cost required for processing the parts.
However, it goes without saying that it is necessary to position the jig 60 and the pedestal 61
with high accuracy.
[0031]
In the above embodiment, the positioning pins are provided on the base and the positioning
holes are provided on the flexible sheet, but conversely, the positioning holes may be provided
on the base and the positioning pins may be provided on the flexible sheet. Further, the number
of positioning pins and positioning holes may not be the same as the number of ultrasonic
transducers, and one for every four to five ultrasonic transducers, for example. Further, the
positioning pin and the positioning hole may not be provided at both ends of the above
embodiment. Furthermore, instead of the positioning pin and the positioning hole, a protrusion
and a groove may be provided.
[0032]
The present invention includes, in addition to the ultrasonic transducer array 10 described in the
above embodiment, an actuator for driving a focus lens and a zoom lens of a camera, and another
transducer array such as a vibrating gyroscope used for an angular velocity sensor Is also
04-05-2019
9
applicable.
[0033]
It is an expanded sectional view showing composition of a tip of an ultrasonic probe to which the
present invention is applied.
It is a top view which shows the structure of the front-end | tip of an ultrasonic probe. It is a
perspective view showing the state at the time of sticking a flexible sheet on a pedestal. It is an
expanded sectional view showing composition of an ultrasonic transducer. FIG. 7 is a perspective
view of another embodiment of the present invention. FIG. 7 is a perspective view of yet another
embodiment of the present invention.
Explanation of sign
[0034]
Reference Signs List 2 ultrasonic probe 10 ultrasonic transducer array 11, 51, 61 pedestal 12
ultrasonic transducer 22, 50 flexible sheet 30 flexible wiring member (FPC) 31, 52, 63
positioning pin 32, 53 positioning hole 40 piezoelectric element 42a, 42b individual electrodes,
common electrode 46 controller 60 jig
04-05-2019
10
Документ
Категория
Без категории
Просмотров
0
Размер файла
19 Кб
Теги
jp2006247130
1/--страниц
Пожаловаться на содержимое документа