JPS5935206Y2 - ultrasonic probe - Google Patents

Description

[Detailed description of the invention] Recently, ultrasonic tomography devices that can view tomographic images of the moving heart and abdomen in real time have been rapidly becoming popular as medical devices.

This is because it has the following characteristics: non-invasiveness, low risk, and a large amount of information obtained for the price.

Ultrasonic diagnostic methods include the pulse reflection method, the Doppler method, and the transmission method, but the Hahals reflection method is currently in practical use and is the mainstream of research.

The principle of this pulse reflection method is that the piezoelectric element
Ultrasonic pulses of approximately MHz are emitted, and echoes are returned from the interface of two tissues (substances) with different acoustic impedances due to impedance mismatch.

This signal is received by the same piezoelectric element, and a brightness modulation sound is applied to the oscilloscope based on its intensity, which displays the position of the echo.

There are two types of diagnostic equipment: a mechanical scanning method and an electronic scanning method, but there is a tendency in the future to standardize on the electronic scanning method, which provides a large amount of information.

In the case of the electronic scanning method, there are two types: one in which only the electrodes are divided into m pieces on the α side of the piezoelectric element, and one in which the straddling piezoelectric element is divided into m pieces.

As shown in FIGS. 1 to 3, a piezoelectric element 1 divided into m pieces is pasted on a resin layer 2, and one end of a lead wire 4 coated with insulation on m electrodes 3 is coated with gold conductive paste. Alternatively, the other end of the lead wire 4 was connected by soldering and guided by a gold lead pin 51, and the other end of the lead wire 4 was connected to the lead pin 5 using a gold lead pin 51.

In the figure, 6 is the connection part made of gold.

Here, if the interval between the piezoelectric elements 1 (casings or electrodes 3) divided into m pieces is about 1 mm, the above connection work is extremely difficult, and the leads on the resin layer 2 to which the piezoelectric element 1 is attached with gold. The arrangement of line 4 was misaligned and looked bad.

Furthermore, when soldering the lead wires 4 onto the pins 5, since the pin spacing is narrow, the soldering iron tends to come into contact with other lead wires, causing problems such as the lead wires being soldered together and the insulation coating being removed. Ta.

Furthermore, since the lead wire 4 is gold-plated on the resin layer 2, there are drawbacks such as wire breakage.

Next is the connection between the detector and the doped pins 5. Since m lead pins 5 and one lead wire i drawn out from the detector must be soldered one by one, the work is difficult and time consuming, and as mentioned above, other There were many problems, such as giving influence money to the lead line.

In addition, the shape was large and the appearance was very bad.

The present invention uses a flexible printed circuit board as lead wires for these electrodes, attaches a connector to the other end of this flexible printed circuit board, and electrically connects the connector attached to the detector with the gold connector. It is easier to work with than conventional methods, is suitable for mass production without worrying about wire breakage, and is compact in appearance by being inserted into the piezoelectric element, flexible printed circuit board, and connector gold storage case. The present invention provides an ultrasonic probe which has advantages such as the storage case serving to prevent the occurrence of wire breakage.

That is, the drawbacks of the above-mentioned conventional example can be completely eliminated by the present invention, which will be explained below.

First, a flexible printed circuit board having m lead wires is used as lead wires.

This board has m lead wires molded and insulated with polyide resin, and the ends of which are solder-plated onto bare wires (copper foil).

Further, the other end of the lead wire has a hole into which a connector terminal can be inserted, and solder plating is applied around the hole.

The structure of an embodiment of the present invention will be explained using FIGS. 4 to 6.

7 is a piezoelectric element, and electrodes 8 are vacuum-deposited on both sides.
It is divided.

Reference numeral 9 denotes a flexible printed circuit board, on which m lead wires are insulated and molded with polyide resin.

At one end of the lead wire of this flexible printed circuit board, m bare wires are arranged with the same dimensions as the m division pitch of the piezoelectric element T, and the surface is solder plated.

Further, the other end of the lead wire has m holes into which connector terminals can be inserted, and solder plating is applied around the holes.

A connector 10 has m terminals 11 inserted into holes in the flexible printed circuit board 9 and m 12-metal metal terminals connected to a connector (not shown) attached to the detector.

Electrical connection between the piezoelectric element 7 and the flexible printed circuit board 9 is made using conductive paste or solder 13.

Further, the flexible printed circuit board 9 and the connector 10 may be connected by simply inserting the terminals 11 into the holes of the flexible printed circuit board 9, but it is more effective to solder the terminals using gold.

The piezoelectric elements 7, which are connected to each other as described above, the flexible printed circuit board 9, and the connector are housed in the 10-karat gold storage case 14 and integrated by appropriate means.

By using flexible printed circuit board gold in the present invention, it is not necessary to connect each pure gold lead to the piezoelectric element and the pins one by one as in the conventional method, making the work easier and suitable for mass production.

Also, by using a connector, there is no need to connect the detector to the pins (soldering).

And since everything can be stored in a storage case, it has a clean appearance and prevents defects such as disconnections.
Very practical value.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional ultrasonic probe, Fig. 2 is a perspective view of the ultrasonic probe seen from below, Fig. 3 is a perspective view of the main part of the piezoelectric element that constitutes the probe metal, and Fig. 4 is An exploded perspective view of one embodiment of the ultrasonic probe according to the present invention, FIG. 5 is a perspective view of the same,
FIG. 6 is a perspective view of a piezoelectric element constituting the probe metal. 7... Piezoelectric element, 8... Electrode, 9...
...Flexible printed circuit board, 10...
Connector, 14...Storage case.

Claims (1)

[Scope of utility model registration request] A flexible printed circuit board metal was used as a lead-out IJ-wire from the electrode of the piezoelectric element divided into m pieces, a connector metal was attached to the other end of the flexible printed circuit board, and a connector attached to the detector and the flexible printed circuit board were attached. An ultrasonic probe that is electrically connected to a connector and housed in a flexible printed circuit board housing case to which the piezoelectric element and connector metal are attached.