JP2660070B2 - Ultrasonic handpiece device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ultrasonic handpiece device having an electrostrictive vibrator.

[Related Art] Ultrasound handpiece devices for treatment for incising or emulsifying living tissue or crushing calculi using ultrasonic vibration are already known. For example, there are those disclosed in JP-A-61-259655 and USP 4,516,398.

FIG. 9 shows an example of a conventional ultrasonic handpiece device for treatment. In this ultrasonic handpiece device, an electrostrictive vibrator 1 is incorporated in a grip portion 2 thereof, and an ultrasonic vibration transmitting probe 3 is connected to the electrostrictive vibrator 1. Also, the electrostrictive vibrator 1
A power cord 4 connected to the power supply cord 4 extends from the grip portion 2, and an electric connector 5 connected to a driving device (not shown) is provided at an extending end of the power cord 4.

When the drive signal is applied to the electrostrictive vibrator 1 by connecting the electric connector 5 to a drive device (not shown) and operating a foot switch (not shown), the electrostrictive vibrator 1
Vibrates to generate ultrasonic vibration, and the ultrasonic vibration is transmitted to the treatment site through the probe 3.

[Problems to be Solved by the Invention] By the way, when using this kind of ultrasonic handpiece device for medical use, it is important to sterilize it.
As the sterilization treatment method, methods such as chemical solution sterilization and gas sterilization are known. In recent years, as a reliable and effective method of sterilization treatment, a method of sterilizing in an atmosphere of high-pressure steam using an autoclave is effective. Is attracting attention.

Sterilization by autoclave is 139 ° C to 140 ° C, 2
This is performed by exposing the ultrasonic handpiece device under an atmosphere of atmospheric pressure.

However, since the electrostrictive vibrator 1 has an electrostrictive element sandwiched between electrodes, spontaneous polarization occurs due to a change in temperature due to its nature. The resistance of the electrostrictive element itself is extremely large. As a result, a high voltage is generated between the electrodes.

Then, after the ultrasonic handpiece device is placed in an autoclave and sterilized in an atmosphere of high-pressure steam, a high voltage is generated between the electrodes, and the high voltage is applied to the connector pins 5a of the electrical connector 5. Appear in between. Also,
When a mechanical shock or the like is applied to the electrostrictive element of the electrostrictive vibrator 1, a high voltage may be generated between the electrodes of the electrostrictive vibrator 1.

Therefore, after sterilization, the user
If you touch 5a, you risk being shocked. Further, if the electric connector 5 is connected to the driving device while a high voltage is being generated between the connector pins 5a, an instantaneous high-voltage discharge may occur, which may damage or adversely affect the driving device.

The present invention has been made in view of the above problems, and an object thereof is to provide an ultrasonic handpiece device provided with an electrostrictive vibrator with means for leaking high voltage generated in the electrostrictive vibrator. An object of the present invention is to secure an ultrasonic handpiece device that is incorporated and secures safety.

[Means and Actions for Solving the Problems] To solve the above problems, the present invention provides an electrostrictive vibrator,
An ultrasonic vibration transmission probe connected to the electrostrictive vibrator, and an electric connector connected to an electrode of the electrostrictive vibrator via a transmission line and receiving an ultrasonic drive signal from an ultrasonic drive signal generator. An ultrasonic handpiece device having a leaking means for electrically connecting a leaking element for leaking a high voltage generated in the electrostrictive vibrator to an electrode of the electrostrictive vibrator. is there.

For example, connecting directly between the electrodes of the electrostrictive vibrator or through a transmission line that transmits an ultrasonic drive signal to the electrostrictive vibrator,
A leak element such as a resistance element having a value large enough to have no effect on driving the electrostrictive vibrator is connected in advance.

Thus, according to this configuration, a high voltage generated between the electrodes of the electrostrictive vibrator due to a temperature change, a mechanical shock, or the like is released through the leak element of the leak means to ensure safety.

Embodiment FIG. 1 shows a first embodiment of the present invention. This therapeutic ultrasonic handpiece device 10 incorporates an electrostrictive vibrator 12 in a grip portion 11 thereof, and a probe 13 for transmitting ultrasonic vibrations for treatment is connected to the electrostrictive vibrator 12. is there.

The electrostrictive vibrator 12 includes a plurality of electrostrictive elements 1 made of, for example, PZT.
4 and an electrode 15 are laminated, and sandwiched and fastened between the front horn 16 with probe and the backing member 17 to be integrally connected. The ultrasonic vibration transmission probe 13 attached to the horn 16 protrudes forward from the grip portion 11.

Further, a power cord 21 for leading a lead wire 20 connected to the electrode 15 of the electrostrictive vibrator 12 is led out from the grip portion 11. An electric connector 22 connected to an ultrasonic drive (not shown) is attached to the extension end of the power cord 21.
Then, the connector pin 23 of the electrical connector 22 and the electrode 15 of the electrostrictive vibrator 12 are electrically connected by a lead wire 20 conducted into the power supply cord 21. A transmission circuit for transmitting the ultrasonic drive voltage from the sound wave drive signal generation circuit to the electrostrictive vibrator 21 is configured.

Further, a leak element 25 for leaking a high voltage generated in the electrostrictive vibrator 12 is interposed between the lead wires 20 in the holding portion 11. In other words, a leak unit electrically connected to the electrostrictive vibrator 12 in parallel with the transmission circuit is configured.

As the leak element 25, a resistance element having a high resistance value large enough to have no influence on driving the electrostrictive vibrator 12 is used. As the resistance element, a platinum element or the like whose characteristics do not significantly change even in a high temperature environment is effective.

The ultrasonic handpiece device for treatment 10 is placed in an autoclave and sterilized in an atmosphere of high-pressure steam, so that a high voltage is generated between the electrodes of the electrostrictive vibrator 12. Then, this high voltage reaches between the connector pins 23 of the electrical connector 22 through the lead wire 20.

However, between the lead wires 20 of the electrostrictive vibrator 12, the leaking element 25 in the grip portion 11 is connected in parallel, so that the leaking element 25 leaks a high voltage. For this reason, the high voltage of the electrostrictive vibrator 12 decreases. Therefore, a dangerous high voltage does not appear between the connector pins 23 of the electrical connector 22.

Therefore, it is safe for the user to touch the connector pin 23, and even if the connector pin 23 is electrically connected to the ultrasonic driving device, the ultrasonic driving device may be damaged or the internal circuit may be damaged. There is no risk of adversely affecting

FIG. 2 shows a second embodiment of the present invention. The therapeutic ultrasonic handpiece device 10 is provided with an electric connector at the extension end of the power cord 21 instead of in the grip portion 11 thereof.
In FIG. 22, a leak element 25 for leaking a high voltage is provided.

If the leak element 25 is provided in the holding portion 11 of the electrostrictive vibrator 12, the device receives ultrasonic vibration from the nearby electrostrictive vibrator 12, but in the second embodiment, the electrostrictive vibration Since the leak element 25 is provided in the electric connector 22 distant from the grip 11 in which the child 12 is built, the ultrasonic vibration is not received. Therefore, the durability of the leak element 25 can be ensured. Other points are the same as those of the first embodiment.

FIG. 3 shows a third embodiment of the present invention. In this therapeutic ultrasonic handpiece device 10, the leak element 25 is gripped by the grip 11, the power cord 21, or the electrical connector.
Instead of being provided on the electric connector 22, it is provided in a waterproof cap 31 attached to the electric connector 22. The leak element 25 is connected between the connector pins 23 of the electrical connector 22 when the waterproof cap 31 is attached to the electrical connector 22.

When the ultrasonic treatment handpiece device 10 is placed in an autoclave for sterilization, a waterproof cap 31 is attached to the electric connector 22 in advance.
And, while keeping the waterproofness in the part of the electrical connector 22,
At the same time, a high voltage generated between the electrodes of the electrostrictive vibrator 12 due to the sterilization is applied to the lead wire 20 and the electrical connector 22.
Through the connector pin 23 to the leak element 25. For this reason, the high voltage of the electrostrictive vibrator 12 decreases. No dangerous high voltage appears between the connector pins 23 of the electrical connector 22.

Therefore, after the sterilization process, it is safe to remove the waterproof cap 31 from the electrical connector 22 so that the user can touch the connector pin 23 and electrically connect the connector pin 23 to the ultrasonic driving device. Also, there is no risk of damaging the ultrasonic driving device or adversely affecting the internal circuit and the like.

Further, in the third embodiment, since the leaking element 25 is provided in the waterproof cap 31 attached to the electric connector 22, it is not normally connected to the electric circuit of the ultrasonic handpiece device 10. . Therefore, of the electrostrictive vibrator 12,
Even when the impedance at the time of driving is relatively high, power loss due to the presence of a leak element 25 such as a resistance element in parallel with the current-carrying circuit can be prevented.

FIG. 4 shows a fourth embodiment of the present invention. In the therapeutic ultrasonic handpiece device 10, the leak element 25 is provided not in the grip portion 11 but in the electrical connector 22 and between the lead wires 20. The electrical connector 22 is formed as a conductive hole (female) 42 instead of a pin. The leak element 25 is connected to the conductive hole (female).
It may be connected between 42. Other points are the same as those of the above embodiment.

FIG. 5 shows a fifth embodiment of the present invention. The ultrasonic treatment handpiece device 10 is an example in which an inductance is used as the leak element 25 instead of a resistance element. Leakage element consisting of inductance
The place where 25 is provided is inside the electric connector 22 as in the fourth embodiment. Of course, it may be provided at the same place as described above or at another place.

When the leakage element 25 made of the inductance is provided in this manner, the resistance is small with respect to the direct current component, so that the effect of the leakage is large. The influence on driving is reduced. It is preferable to set the value as much as possible so as to have such a tendency. Further, it may also be used as an inductance for canceling the braking capacity specific to the electrostrictive vibrator 12.

FIG. 6 shows a sixth embodiment of the present invention. This therapeutic ultrasonic handpiece device 10 has a power cord
Leakage element 25 between lead wires 20 in the middle of 21
Is inserted.

In this way, as shown in FIG.
When the 25 is provided, as shown in FIGS. 7 and 8, an installation box 35 is inserted in the middle of the power cord 21, and the leak element 25 is installed in the installation box 35. Good.

The present invention is not limited to the above embodiment.

[Effects of the Invention] As described above, the present invention provides a leak device for electrically connecting a leak element for leaking high voltage generated in an electrostrictive vibrator to an electrode of the electrostrictive vibrator. Even if a high voltage is generated between the electrodes of the electrostrictive vibrator due to temperature change or mechanical shock during sterilization, etc., the high voltage is discharged through the leak element of the leak means. In addition, when using the therapeutic ultrasonic handpiece device, the user does not receive an electric shock, and the ultrasonic activation device is not damaged or adversely affected.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a therapeutic ultrasonic handpiece device showing a first embodiment of the present invention, and FIG. 2 is a side sectional view of a therapeutic ultrasonic handpiece device showing a second embodiment of the present invention. FIG. 3 is a side sectional view of a connector portion of a therapeutic ultrasonic handpiece device according to a third embodiment of the present invention. FIG. 4 is a therapeutic ultrasonic hand according to a fourth embodiment of the present invention. FIG. 5 is a side sectional view of a connector portion in a piece device, FIG. 5 is a side sectional view of a connector portion in a therapeutic ultrasonic handpiece device showing a fifth embodiment of the present invention, and FIG. 6 is a sixth embodiment of the present invention. FIG. 7 is a side sectional view of an ultrasonic treatment handpiece device showing an example, FIG. 7 is a cross-sectional view of an installation box in the middle of a power cord of the treatment ultrasonic handpiece device, and FIG. It is sectional drawing of an installation box. FIG. 9 is a side sectional view of a conventional ultrasonic handpiece device for treatment. 10 …… Therapeutic ultrasonic handpiece device, 11 …… Grip part,
12 ... electrostrictive oscillator, 13 ... probe, 15 ... electrode, 20 ...
... lead wire, 21 ... power cord, 22 ... electric connector,
25 ... leak element.

Claims (1)

(57) [Claims] An electrostrictive vibrator, an ultrasonic vibration transmitting probe connected to the electrostrictive vibrator, and an ultrasonic drive signal generator connected to an electrode of the electrostrictive vibrator via a transmission line. An ultrasonic handpiece device having an electric connector for receiving an ultrasonic drive signal according to claim 1, wherein a leaking element for leaking a high voltage generated in said electrostrictive vibrator is electrically connected to an electrode of said electrostrictive vibrator. An ultrasonic handpiece device provided with a leak means for electrically connecting.