JPH09266913A - Ultrasonic hand piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic hand piece which can control vibration in the horn part so that it will not be transmitted to the hand piece main body and can quickly and securely cool down an area to be processed. SOLUTION: This device has an ultrasonic horn part 6 with a tool part 6Bk, and the hand piece main body 8. An ultrasonic vibrator 4 is installed in the hand piece main body 8, and the ultrasonic hour part 6 is held by the hand piece main body 8 by way of a flange part 6a. A front case 10 whose cross section is U-shaped with a through hole at the center is rotatable installed at the top of the hand piece main body 8. A gap 11 is formed between the front case 10 and the hand piece main body 8 to keep cooling liquid tentatively, and a liquid guide passage 13 running into the gap 11 is formed on the side wall of the hand piece main body 8. A cooling liquid guide hole 6C connecting to the tool part 6Bk is made on the ultrasonic hone part 6, and a cooling liquid entrance 6Ca of the cooling liquid guide hole 6A is opened inside the gap 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic handpiece, and particularly to an ultrasonic handpiece that effectively functions as one of various surgical scalpels and also functions as a device for processing plastic products and the like. Regarding the handpiece.

[0002]

2. Description of the Related Art In the medical field, ultrasonic handpieces have been used relatively frequently as one of various surgical scalpels. In the industrial field, various ultrasonic handpieces have been widely used for cutting plastics.

Conventional examples of this ultrasonic handpiece are shown in FIGS. Of these, FIG. 4 shows the overall configuration of an ultrasonic processing apparatus including an ultrasonic handpiece. In FIG. 4, reference numeral 50 indicates an ultrasonic handpiece for ultrasonic processing, and reference numeral 52 indicates an ultrasonic oscillator. Further, reference numeral 54 is a cooling cleaning liquid (irrigation liquid).
Is a plastic transparent bag containing physiological saline, and reference numeral 54A is a cooling liquid introduction hose for feeding the cooling liquid in the transparent bag 54 into the ultrasonic handpiece 50.
The cooling liquid introducing hose 54A is provided between the transparent bag 54 and the ultrasonic handpiece 50 via a roller-type rotary water injection pump 53.

Further, in FIG. 4, the above-mentioned ultrasonic oscillator 52 is provided with a first power switch 52A for turning on / off the operation thereof and a second power switch for allowing the operator to operate it with his / her foot. It is equipped with a certain foot switch 52B. Reference numeral 55 is a transparent bag 54 for the cooling liquid.
Shows a stand for hanging.

The ultrasonic handpiece 50, as shown in FIG. 5, is an ultrasonic transducer 50 that outputs ultrasonic waves of a predetermined frequency.
A, an ultrasonic horn unit 50B coaxially integrated with the ultrasonic vibrator 50A and receiving and converging the ultrasonic waves output from the ultrasonic vibrator 50A, and the ultrasonic vibrator 50A are housed. And a handpiece body 50C equipped with an ultrasonic horn portion 50B protruding therefrom, and an ultrasonic horn portion 50.
An ultrasonic tool (tool) 50D coaxially equipped with the ultrasonic horn 50B is provided at the tip of B.

The ultrasonic horn portion 50B has a thin plate-shaped annular collar portion 50Ba around the ultrasonic transducer 50A side, and the annular collar portion 50Ba is used for a screw member 50Ca and a seal member 50Ce and for sealing. The ultrasonic horn unit 50 is sandwiched by the O-ring 50Cf.
B is connected to the handpiece body 50C.

The ultrasonic horn portion 50B is equipped with a cooling liquid jetting means 56 for jetting a predetermined cooling liquid toward the work piece. Reference numeral 56A indicates a cooling liquid introduction pipe, and reference numeral 5
Reference numeral 6B denotes a cooling liquid introducing nipple provided in the ultrasonic horn portion 50B for discharging the cooling liquid from the tool 50D portion. As a result, heat invasion (heat damage) of the processed portion due to overheating that is likely to occur along with ultrasonic vibration of the tool 50D
The occurrence of is effectively suppressed in advance.

Further, in this conventional example, as shown in FIG. 5, the annular collar portion 50Ba is sandwiched by the seal members 50Ce and O-rings 50Cf arranged on both sides thereof,
As a result, the ultrasonic horn portion 50B is connected to the handpiece body 50C while maintaining a state of being floated from the handpiece body 50C. Therefore, in this conventional example, the vibration of the ultrasonic horn portion 50B is absorbed by the seal member 50Ce and the O-ring 50Cf, and the operability is excellent in this respect.

[0009]

However, in the above-mentioned conventional example, since the coolant introducing portion of the coolant injecting means 56 is provided so as to project from the handpiece body 50C, it is processed during actual use. There was an inconvenience that the field of view was obstructed.

Further, in the above-mentioned conventional example, since the position of the cooling liquid introduction pipe 56A of the cooling liquid injection means 56 and the nipple 56B of the ultrasonic horn portion 50B connected thereto is fixed, Alignment requires a lot of time and labor, and maintainability is poor, which has always been a problem.

[0011]

An object of the present invention is to improve the inconvenience of the conventional example, and in particular, it is possible to maintain a good field of view with respect to a processed portion, and to install the ultrasonic horn at a mounting position for introducing a cooling liquid. It is an object of the present invention to provide an ultrasonic handpiece which can be freely adjusted regardless of the path and has good maintainability and operability.

[0012]

In order to achieve the above object, in the invention according to claim 1, an ultrasonic oscillator for outputting an ultrasonic wave of a predetermined frequency and an ultrasonic oscillator are integrally provided coaxially with the ultrasonic oscillator. The ultrasonic horn unit which is connected and converges the ultrasonic waves output from the ultrasonic vibrator, and the ultrasonic horn unit which is provided inside the ultrasonic horn unit and which is provided with the ultrasonic horn unit. A cylindrical handpiece body for holding the sonic horn portion is provided, and the ultrasonic tool portion is provided at the tip portion of the ultrasonic horn portion described above.

Further, a front case having a U-shaped cross section having a through hole for an ultrasonic horn portion in a central portion is detachably attached to a tip portion of the handpiece body. A gap is provided between the front case and the tip surface of the handpiece body to temporarily hold the cooling liquid. or,
The liquid introduction path leading to the void is provided in the side wall of the handpiece body described above. Then, in the central axis portion of the ultrasonic horn portion described above, a cooling liquid guide hole continuous with the ultrasonic tool portion is provided, and the cooling liquid introduction port of this cooling liquid guide hole is set in the above-mentioned void portion, I am collecting.

Therefore, according to the first aspect of the present invention,
First, the ultrasonic waves generated by the ultrasonic transducer 4 are converged by the ultrasonic horn portion 6 and the tool portion (ultrasonic tool portion) at the tip end portion.
Drive 6 Bk.

Next, the tool portion is brought close to the processing location and the water injection pump is turned on to inject the cooling cleaning liquid (irrigation liquid) toward the operation portion. In this case, since the cooling cleaning liquid is poured directly from the central axis portion of the ultrasonic horn to the processing portion, the ultrasonic horn portion and the tool portion (ultrasonic tool portion) 6Bk are cooled and the processing portion is cooled. And cleaning can be done at the same time. Further, since the liquid introduction path 13 is provided on the side wall of the handpiece body 8, the structure of the tip of the ultrasonic handpiece is simplified,
At the time of use, the visibility of the operator is less obstructed, and operability can be improved in this respect.

Further, since the front case 10 can be easily attached and detached, when a problem such as clogging of the liquid injection hole 10A occurs during use, the front case 10 can be replaced immediately to deal with hole clogging or the like. can do.

[0017]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. First, in FIG. 1, reference numeral 2 indicates an ultrasonic handpiece. This ultrasonic handpiece 2 is an ultrasonic transducer 4 that outputs ultrasonic waves of a predetermined frequency, and an ultrasonic transducer that is integrally connected coaxially with the ultrasonic transducer 4 and that is output from the ultrasonic transducer 4. An ultrasonic horn unit 6 for inputting and converging a sound wave is provided. Reference numeral 8 indicates a tubular handpiece body. This handpiece body 8
Is a part of the ultrasonic transducer 4 and the ultrasonic horn portion 6 described above which are disposed inside, and the ultrasonic horn portion 6 and the ultrasonic horn portion 6 are disposed via the collar portion 6a provided in the ultrasonic horn portion 6. It holds the oscillator 4.

The ultrasonic horn portion 6 is provided with a first horn portion 6A having the above-mentioned collar portion 6a at the center thereof, and is screwed on the same axis as the first horn portion 6A and extends outward. And a second horn portion 6B having a predetermined length.
A tool portion (ultrasonic tool portion) 6Bk is detachably attached to the tip portion of the second horn portion 6B.

A front case 10 having a U-shaped cross section (cap shape) is provided at the tip of the handpiece body 8 (on the side of the second horn 6B). This front case 10
Is provided with a through hole 10a for the ultrasonic horn portion 6 in the central portion, and is detachably attached to the tip portion of the handpiece body 8 described above. A sealing groove 10E is formed in the through hole 10a. Reference numeral 10F indicates an O-ring for sealing provided in the groove 10E for sealing.

Specifically, the inner diameter of the front case 10 on the opening side (left side in FIG. 1) is formed slightly larger than the outer diameter of the tip of the handpiece body 8 described above, and is slidably fitted. Have been combined. Further, as shown in FIGS. 1 and 2, the inner diameter portion of the front case 10 on the opening side is O
The groove 10b for storing the ring is formed, and the groove 10b is formed.
An O-ring 12 for sealing the fitting surface between the handpiece body 8 and the front case 10 is housed inside. In this case, the O-ring 1 is also attached to the handpiece body 8 side.
The concave groove 12a for 2 is formed shallowly. As a result, shearing stress and frictional force act appropriately on the O-ring 12, and the front case 10 is prevented from coming off the handpiece body 8.

On the other hand, in order to separate the front case 10 from the handpiece body 8, an external force slightly larger than the frictional force of the O-ring 12 is applied.
And the front case 10 is gradually pulled out. As a result, the O-ring 12 is deformed and separated from the shallow groove 12a on the handpiece body 8 side. Therefore, the front case 10 can be relatively easily detached from the handpiece body 8 as needed.
This state is shown in FIG.

Here, the front case 10 having a U-shaped cross section.
Is the handpiece body 8 via the O-ring 12 for sealing.
Since it is attached to the O-ring 1 as shown by the arrow a in FIG.
It is possible to rotate the front case 10 along the outer circumference of 2.

Front case 10 and handpiece body 8
A gap portion 11 for temporarily holding the cooling liquid is provided between the gap surface 11 and the tip surface of the. Further, the liquid introduction passage 13 communicating with the void portion 11 is formed in the side wall portion of the handpiece body 8 described above.

Here, in each central axis portion communicating with the second horn portion 6B and a part of the above-mentioned first horn portion 6A connected to the second horn portion 6B, a cooling liquid is supplied to the tool portion (ultrasonic tool portion) 6Bk at the tip portion. Is provided with a coolant guide hole 6C for feeding. Then, the cooling liquid introduction port 6Ca of the cooling liquid guide hole 6C is set in the void portion 11 described above.
In this case, the cooling liquid introduction ports 6Ca are provided at two locations in FIG. 1, but may be three locations or four locations.

Therefore, the cooling liquid is continuously and directly poured into the working portion through the cooling liquid guide hole 6C, so that the working portion can be quickly cooled.

A rear end cap 14 for holding and guiding a signal input cable for inputting a vibrator drive signal is provided at the left end (rear end) in FIG. 1 of the cylindrical handpiece body 8. There is. Further, a liquid introduction pipe 15 for introducing a predetermined cooling cleaning liquid (irrigation liquid) from the outside into the liquid introduction passage 13 is connected to the rear end portion of the handpiece body 8.

An annular protrusion 8A is provided on the inner diameter side of the right end portion (tip portion) of the handpiece body 8 in FIG. Further, on the right side of the annular protrusion 8A in FIG. 1, a tubular and relatively thick annular pressing member 8B corresponding to the annular protrusion 8A is screwed on the inner diameter side of the handpiece body 8. There is. And this annular protrusion 8
The collar portion 6a provided on the ultrasonic horn portion 6 is sandwiched by A and the annular pressing member 8B, and the ultrasonic horn portion 6 is held by the handpiece body 8 by this. Reference numeral 8Bc (see FIG. 2) indicates a locking hole for applying a rotational force to the annular pressing member 8B.

Here, the concave groove 6 for accommodating the O-ring is provided in the first horn portion 6A of the ultrasonic horn portion 6 facing the inner diameter surface of the annular protruding portion 8A in the handpiece body 8 described above.
Aa is formed, and an O-ring 16 for sealing the inside of the handpiece body 8 is housed in the groove 6Aa. In addition, on the inner diameter side and the outer diameter side of the above-mentioned annular pressing member 8B, respectively, the concave groove 6Ba for storing the O-ring,
6Bb is formed and equipped with O-rings 17 and 18, which further effectively seal the inside of the handpiece body 8.

O-rings 16 to 1 installed at these three locations
8 also has a function of absorbing a part of the vibration of the ultrasonic horn section 6 at the same time, whereby a part of the ultrasonic component propagating to the handpiece body 8 side is effectively absorbed. ing. Other configurations are the same as those of the above-described conventional example.

Next, the operation and effects of the above embodiment will be described. First, when the rotary water injection pump for the cooling cleaning liquid (irrigation liquid) is turned off and the entire apparatus is set to the operating state, the ultrasonic transducer 4 operates and the generated ultrasonic wave is generated by the ultrasonic horn unit 6. 1 horn section 6A, 2nd horn section 6B
Then, the tool portion (ultrasonic tool portion) 6Bk at the tip of the second horn portion 6B is driven.

Next, the tool portion 6Bk is brought close to the processing location, and the rotary water injection pump is turned on to inject the cooling cleaning liquid (irrigation liquid) toward the processing location.
In this case, the cooling cleaning liquid (irrigation liquid) enters from the cooling liquid introducing port 6Ca located in the void portion 11 and passes through the cooling liquid delivery hole 6C to a part of the first horn portion 6A and the second horn portion 6B. While passing through the central axis portion, the respective horn portions 6A, 6B are cooled and sent into the tool portion (ultrasonic tool portion) 6Bk at the tip portion, and jetted from the tool portion 6Ba toward the processing location as described above. To be done.

Therefore, the cooling liquid is continuously and directly poured into the processing portion through the cooling liquid guide hole 6C, whereby the processing portion is quickly and accurately cooled and cleaned.

As described above, in the above embodiment, the front case 10 is provided with the void portion 11 and the ultrasonic horn portion 6 is provided so that the cooling liquid introduction port 6Ca is located in the void portion 11. The cooling liquid introduction port 6Ca is always opened in the cavity 11 no matter how the sonic horn section 6 is rotated to adjust its position on the axis. Therefore, the inconvenience of the conventional example that it takes time to align the cooling liquid introduction mechanism with the cooling liquid introduction mechanism is completely eliminated.

Further, since the front case 10 can be easily attached and detached, if a problem such as clogging of the liquid injection hole 10A occurs during use, the front case 10 can be replaced immediately to deal with hole clogging or the like. can do.

Further, the liquid introduction path 12 is connected to the handpiece body 8
Since it is provided on the side wall portion of the ultrasonic handpiece, the structure of the tip portion of the ultrasonic handpiece is simplified, and the visual field of the operator is less obstructed during use, and operability can be improved in this respect.

[0036]

Since the present invention is constructed and functions as described above, according to this, the cooling liquid is continuously and directly poured into the processing portion through the cooling liquid guide hole, so that the processing portion can be quickly processed. Since the ultrasonic horn is equipped so that the cooling liquid can be cooled and cleaned properly and the cooling liquid inlet is located in the cooling liquid retention space formed by the front case, the ultrasonic horn is attached to the shaft. The cooling liquid introduction port is always open in the gap no matter how the position is adjusted by rotating it. Therefore, it takes time to align the cooling liquid introduction means with the ultrasonic horn. The inconvenience of the conventional example can be almost completely eliminated, and in this respect, maintainability can be effectively improved.

Further, since the front case can be easily attached / detached, if inconvenience such as clogging of the liquid injection hole occurs during use, the front case can be replaced immediately to deal with the hole clogging. In addition, since the liquid introduction path is provided on the side wall of the handpiece body, the structure of the tip of the ultrasonic handpiece is simplified, and there is less obstruction of the operator's view during use, which improves operability. It is possible to provide an excellent ultrasonic handpiece that can be achieved, which has not been achieved conventionally.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view showing an embodiment of an ultrasonic handpiece according to the present invention.

FIG. 2 is a detailed partial cross-sectional view showing a mounting portion of an ultrasonic horn portion of the ultrasonic handpiece disclosed in FIG.

3A and 3B are views showing a function of a front case of the ultrasonic handpiece disclosed in FIG. 1, FIG. 3A is an explanatory view showing a rotating operation of the front case, and FIG. It is explanatory drawing which shows operation.

FIG. 4 is an explanatory diagram showing an entire ultrasonic processing system including an ultrasonic handpiece in a conventional example.

5 is an explanatory diagram showing an example of the ultrasonic handpiece disclosed in FIG. 4. FIG.

[Explanation of symbols]

 2 Ultrasonic handpiece 4 Ultrasonic transducer 6 Ultrasonic horn section 6a Collar section 6Bk Ultrasonic tool section (tool section) 6C Coolant guide hole 6Ca Coolant inlet 8 Handpiece body 10 Front case 11 Void section 13 Liquid introduction Road

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naomi Takekawa 8-33-8 Takashimadaira, Takashimadai, Itabashi-ku, Tokyo 302 (72) Inventor Yukihiro Kato 505-1 Hongo-cho, Funabashi-shi, Chiba Clio Nishifunabashi Ichibankan 606

Claims (1)

[Claims] 1. An ultrasonic transducer which outputs ultrasonic waves of a predetermined frequency, and ultrasonic waves which are coaxially integrated with the ultrasonic transducer and converge the ultrasonic waves output from the ultrasonic transducer. A horn portion, and a tubular handpiece body that holds the ultrasonic horn portion through a flange portion provided in the ultrasonic horn portion while disposing the ultrasonic transducer portion inside, An ultrasonic handpiece comprising an ultrasonic tool part at the tip of the ultrasonic horn part, wherein a U-shaped cross section having a through hole for the ultrasonic horn part at the center part at the tip part of the handpiece body. -Like front case is detachably equipped, and a space for temporarily holding the cooling liquid is provided between the front case and the tip surface of the handpiece body, and a liquid introduction path leading to the space is provided. Of the handpiece body It is provided in the wall portion, and the central axis portion of the ultrasonic horn portion is provided with a cooling liquid guide hole that is continuous with the ultrasonic tool portion, and the cooling liquid introduction port of this cooling liquid guide hole is set in the void portion. Characteristic ultrasonic handpiece.