JPS55109999

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DESCRIPTION JPS55109999
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view from above showing an
embodiment of an ultrasonic probe according to the present invention, FIG. 2 is a perspective
view from above and FIG. 3 is the same It is an expansion perspective view of the A section of
FIG. 1 ...... piezoelectric element, 2 ...... backing material, 4 ...... flexible printed circuit board, 6 ... ...
ground side lead wire, 8 ...... Pin type connector, 9... 19. ピン。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic
probe which can reduce the number of assembling steps. The ultrasonic probe has a structure in
which a piezoelectric element is attached to a banking material, this piezoelectric element is
divided into electrodes (plus side), and a wire 2 is divided into a plurality of transducers by
element separation. It is used in ultrasonic diagnostic equipment. In the conventional ultrasonic
probe, one lead wire is connected to the piezoelectric element, and lead soldered to the pin on
the opposite side, and the side surface of the one backing material so that the lead wire does not
sag and break. Paste it on b. Therefore, the number of assembling steps of the probe is increased,
and it has a disadvantage that it can be manufactured inexpensively. The present invention has
been made to eliminate such drawbacks of the prior art, and an embodiment thereof will be
described together with the drawings. First, the piezoelectric element 1 is attached to the upper
surface 11C of the backing material 2. The piezoelectric element 1 has the ground common
electrode 3 on its surface and a plurality of divided positive electrodes (shown in FIG. Is provided.
Here, the piezoelectric element 1 may be divided into elements, and the divided electrodes on the
ground side may be made conductive by the common electrode. A flexible or 3 printed board 4 is
connected to the piezoelectric element 1, and the flexible printed board 4 is attached to the side
surface of the backing material 2 with an adhesive or the like. That is, as shown in FIG. 3, the
copper foil 5 on the flexible printed board 4 is connected to the positive electrode of the
piezoelectric element 1 so that the transmission of the electric signal becomes possible. On the
other hand, the ground side of the piezoelectric element 1 is led by the lead wire 6. That is, the
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ground side common electrode 3 of the piezoelectric element 1 has its own center at several
places (four places in the embodiment). Is connected. Here, an insulating coat (not shown) is
normally formed on the entire surface of the flexible printed board 4 so that the copper foil 5
and the lead @ 6 do not contact each other. Then, the flexible printed board 4 and the ground
side lead wire 6 are guided to the lower surface side of the backing material 2 and b. A printed
circuit board 7 formed by adhering the lower surface portion of the flexible printed board 4 is
adhered to the lower surface side of the backing material 2, and the flexible printed circuit board
4 is the front side of the printed circuit board 7 (the lower surface of the backing material 2- 2)
Yu 1 j i i 、 ヵ 8 ピ ア ピ ア イ イ (((Yo, ず). -L-'4 has been reached. In addition, a copper foil for
connecting to the ground side lead wire 6 is provided on the portion of the flexible printed board
4 attached to the front side of the printed board 7, and this copper foil is used for the pin
insertion hole of the printed board 7. It will reach you.
The printed circuit board 7 is soldered in a state where the pin type connector 8 is inserted into
the pin insertion hole of the printed circuit board 7 and is adhered to the lower surface side of
the backing material 2. A plurality of pins 9 of the connector 8 are flexible. It is electrically
connected to the copper foil 6 (including the copper foil for connection to the earth side lead
wire) of the bump printed board 4. At this time, the connecting surface of the pin 9 and the
flexible flint plate 4 is visible from the outside, and the pin type connector 8 is integrally formed
by embedding a plurality of pins 9 in resin in a straight line. As a matter of course, the pin
insertion holes are also formed linearly. Finally, the ground lead wire 6 and the copper foil are
soldered to b. The troublesome work of connecting the-, xctop 1 ′ ′ ′ ′ ′ 0′hu, E′ty; +
t <IEE 1 $ ′ ′ ′ ′) becomes unnecessary, and the cost can be reduced by a large size.
Moreover, although the earth side lead wire was taken out from two places of the end
conventionally, by increasing the number and taking out the lead wire also from the center part,
leakage is reduced by reducing the current loop flowing to the vibrator in the center part. It is
something we are reducing. In this case, the earth side lead wire width o, ssw or more, thickness
35-200 nmli! It becomes effective by increasing the contact with the metal plate which shields
the whole Frekin pull printed board from above by setting it as a degree of foil, and the thickness
is not weak in strength, and the thickness is effective for shielding effect In this way, the present
invention reduces the number of assembling steps and also allows the user to remove the female
connector even when using it, so it is necessary to remove the soldering even if the probe fails. It
is nothing. Further, due to the increase of the ground side lead wire, the loss due to the radio
wave leakage is small even for the high frequency vibrator. And, the shield structure is also easy
as described above and has a great effect in practical use 6.
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