JPH0698152B2 - Electrosurgical knife tip electrode holder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scalpel electrode holder for electrosurgery used during surgery.

[0002]

2. Description of the Related Art Generally, in this kind of electrosurgical scalpel tip electrode holder, a scalpel tip electrode is removably attached to the end of an elongated cylindrical holder body so that it can be repeatedly used after being sterilized by gas sterilization or the like. . In addition, a push button type hand switch mechanism is attached to the tip of the holder body in a waterproof manner with waterproof rubber to prevent blood and chemicals from entering during surgery. A cord with is connected. Thus, the connector is connected to the electrosurgical unit, and the surgeon holds the holder main body in his hand and operates the hand switch mechanism at the time of surgery to switch the output signal of the electrosurgical unit at hand.

Conventionally, in particular, the hand switch mechanism of the electrosurgical knife tip electrode holder is constructed as shown in FIGS. 7 and 8, for example. That is, in the conventional example of FIG. 7, the holder 40 has a holder body 41 in the shape of an elongated circular cylinder, and the printed board 43 is engaged with the circular hole 42 inside the holder body 41, and the left and right sides are engaged with the guides 44. It is fixedly mounted by the pin 45. A contact point 47 of a hand switch mechanism 46 is provided at a predetermined position on the printed circuit board 43, and a bowl-shaped movable piece 48 having a spring function and a push button 49 are overlapped on the contact point 47. As a result, when the push button 49 is pressed with a finger, the center of the movable piece 48 comes into contact with the contact point 47 while being depressed, and the switch is turned on. When the finger is released from the push button 49, the movable piece 48 returns to its original shape due to the restoring force. By returning, it separates from the contact point 47 and switches OF
It is configured to perform F.

In the conventional example shown in FIG. 8, a printed circuit board 43 is mounted in a hole 42 inside a holder body 41 of a holder 40 in the same manner as described above, and a contact 47 of a hand switch mechanism 46 is projected on the printed circuit board 43. At the same time, the plate-shaped movable piece 50 having a spring function is attached by the fixed member 51. Then, the push button 49 is disposed at the free end portion of the movable piece 50. This push button 49
By pressing or releasing the finger, the plate-shaped movable piece 5
0 is elastically deformed and comes in contact with and separates from the contact point 47 to turn the switch ON and OFF.

[0005]

By the way, in the former case of the above-mentioned prior art, since the switch operation is directly performed by the deformation and restoration of the bowl-shaped movable piece 48, the switch O
A certain amount of restoring force is required to ensure the FF. For this reason, the push operation of the push button 49 is inevitably hard, and the fatigue of the operator is increased especially in the case of a long-time operation. Since the movable piece 48 has a bowl shape, it is preferable that the movable piece 48 be deeply curved, but it cannot be made too deep due to a limitation when it is housed in the holder main body 41. Therefore, the contact point 47 cannot use a contact point member and has to be formed by the pattern of the printed circuit board 43, so that the contact point 47 is easily deteriorated. This
The mechanism is mainly disposable (disposable).
e) The mechanism used for the type.

Further, in the latter of the above-mentioned prior arts, since the switch operation is directly performed by the deformation and restoration of the plate-shaped movable piece 50, the push operation of the push button 49 becomes hard similarly to the above. Since the free end of the plate-shaped movable piece 50 is in contact with the contact 47, it is difficult to feel the contact when the contact 47 is contacted, and there is no switch operating sound .

The present invention has been made in view of this point, and the outer shape of the holder body is formed so as not to slip, and the pressing operation of the hand switch mechanism is reduced to reduce the fatigue of the operator.
It is another object of the present invention to provide an electrosurgical scalpel tip electrode holder that produces a clear operating sound when the switch is operated so that it can be clearly seen.

[0008]

In order to achieve the above object, the present invention has a holder main body formed in an elongated tubular shape and held by an operator's hand, and a female tip electrode is provided at the tip of the holder main body. In the electrosurgical knife tip electrode holder, a printed circuit board that is detachably attached and installed inside the holder body is provided with a hand switch mechanism that turns the switch on and off by operating a push button with the operator's finger. A support member having a U-shape in a plan view, which is electrically connected and fixed to the printed circuit board by a switch mechanism, and a bifurcated plate-shaped member, which is swingably attached to the support member and contacts a contact member of the printed circuit board. a movable piece which is provided so as to release, is biased between the support member and the movable piece, a wide rectangular movable piece of contact members and width depending on the presence or absence of pressing of the push button
The upper limit position of the groove is provided with a coil spring that strongly abuts while making an operating noise.

[0009]

According to the above construction, when the operator grips the holder body with the hand and operates the push button with the thumb, the push button operates the coil spring of the hand switch mechanism. Then, the movable piece is pushed down by the coil spring,
The movable piece comes into contact with the contact member while generating an operating sound, and the switch is turned on with good response. By releasing the pressing force of the coil spring, the movable piece is jumped up, and the upper limit of the wide rectangular groove is reached.
Similarly, an operation sound is generated between the mounting portion and the contact member, and the operation is performed so that the switch is turned off with good response. In this case, it is possible to confirm each operation state by the operation sound.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, an outline of the entire electrosurgical knife tip electrode holder will be described. The holder 1 has a long and slender tubular holder body 10 made of a resin having insulation properties, and a female knife electrode 2 is detachably attached to the tip of the holder body 10 by an attachment head 33, and a connector is provided at the rear end. A cord 4 with 3 is connected. Also,
On the tip side of the holder body 10, two push buttons 21 of the hand switch mechanism 20 are projected at the position of the thumb when gripped with a hand.

2 to 4, the structure of each portion will be described. The outer shape of the push button portion of the holder body 10 is formed in a substantially pentagonal cross-sectional shape as shown in FIG. 3 so as to prevent slippage, and a hole portion 11 is provided inside the holder body 10. The hole 11 has a semi-circular hole 12, a guide 13, a wide rectangular groove 14 and a narrow rectangular groove 15 which are stacked to communicate with each other.
It extends to the place where it is inserted into the
The elongated printed circuit board 5 is inserted and installed in the cable 13. The printed circuit board 5 is provided with a metal plug 6 at its tip, a contact member 22 at its upper part, and a movable piece mechanism 25 for performing a switch operation by generating an operation sound. Further, a fixing ring 30, a chuck 31, a chuck holder 32, and a mounting head 33 are attached to the tip of the holder body 10.

The holder body 10 is formed with a female screw 10a and a hole 10c having a rotation preventing projection 10b inside the tip of the hole 11. The fixing ring 30 has a male screw 3 on the outer circumference.
0a, the female screw 30b is provided on the inner circumference, and the male screw 30a is screwed into the female screw 10a inside the holder body 10 to be fastened. The chuck holder 32 has a male screw 32 at the front of the outer circumference.
a has a large diameter portion 32c provided with a groove 32b that engages with the protrusion 10b on the rear side, and a through hole 32d is provided at the center.
The chuck holder 32 is the holder body 1.
At the tip of the fixing ring 30 of 0, the large diameter portion 32d is loosely fitted in the hole 10c with the groove 32b engaged with the protrusion 10b and prevented from rotating, and the male screw 32a is projected and fixed to the outside of the main body.

The chuck 31 is made of metal and has a stopper 3
1a has a sandwiching piece 31b that is divided in half, a male screw 31c on the rear side, an electrode insertion hole 31d on the front side of the center, and a connection hole 31e on the rear side. And this chuck 31
Is inserted into the through hole 32d of the chuck holder 32, the male screw 31c is screwed into the female screw 30b of the fixing ring 30 so that the stopper 31a abuts on the front end of the chuck holder 32, and the holding piece 31b is projected and fixed. It At this time, the printed circuit board 5 is inserted into the connection hole 31e of the chuck 31.
The plug 6 is tightly fitted, and the printed board 5 is fixed and electrically connected by both.

The mounting head 33 is formed in a substantially conical shape,
A taper hole 33a and a female screw 33b are provided at the center, the taper hole 33a is brought into contact with the holding piece 31b of the chuck 31, and the female screw 33b is screwed to the male screw 32a of the chuck holder 32 to be mounted. As a result, the attachment head 33 is loosened to insert the knife tip electrode 2 into the sandwiching piece 31b of the chuck 31, and in this state, the attachment head 33 is tightened to reduce the sandwiching piece 31b, whereby the knife tip electrode 2 is fixed. . And
At this time, the knife tip electrode 2 is electrically connected to the printed circuit board 5 via the chuck 31 and the plug 6. Further, by loosening the mounting head 33, the female tip electrode 2 can be easily removed and sterilized for repeated use.

As a result, during assembly, the holder body 1
When the printed circuit board 5 is stopped in the guide 13 of the hole portion 0 of 0 ,
Insert the fixing ring 30 into the holder body 10
Installation, then the chuck holder 32 is installed,
Insert the plug 6 of the printed circuit board 5 into the rear chuck 31.
Then, the mounting head 33 is mounted.

The movable piece mechanism 25 of the hand switch mechanism 20 will be described with reference to the side view of FIG. 5A and the plan view of FIG. The movable piece mechanism 25 has a support member 26 made of metal and having a U-shape in a plan view. The support member 26 is fixed on the printed circuit board 5, and square recesses 26b are formed at the ends of both side pieces 26a. It The movable piece 27 made of metal is formed into a two-pronged plate shape. The movable piece 27 swings up and down in a state in which both leg portions 27a are engaged with the recesses 26b, and the contact member 22
It is provided so that it can be brought into and out of contact with. Also, the support member 2
A coil spring 28 is urged between the end portion of 6 and the substantially central portion of the movable piece 27, and a switch operation is performed by the force of the spring 28.

That is, in the free state, the spring force causes the movable piece 27 to jump up to the upward inclined position where it abuts against the upper corner portion 26c of the recess 26b, whereby the movable piece 27 is quickly separated from the contact member 22 and is switched. It is turned off, and at this time, the movable piece 27 is strongly contacted with the upper limit position of the wide rectangular groove 14 to generate an operating noise. When the spring 28 is pressed in the middle, the movable piece 27 is pressed downward, and when the spring 28 and the movable piece 27 are substantially aligned with each other,
The spring force acts in the longitudinal direction of the movable piece 27 to extremely reduce the lifting force. As a result, the movable piece 27 suddenly reverses to the downward operating state, strongly abuts the contact member 22 to generate an operating sound, and is electrically connected to the contact member 22 via the support member 26, the spring 28 and the movable piece 27. And switch on. Also, in this case, the spring 28
By reducing the lifting force of the movable piece 27 due to, it is possible to hold the switch in the ON state with a light pressing force.

Further, the printed circuit board 5 is a holder body 10.
When it is inserted and installed in the guide 13 of the movable piece mechanism 2
5 is accommodated in the wide rectangular groove 14 of the hole portion 11, and the groove 14 positions the movable piece 27 in the left-right direction and the upper limit position. Further, in the housed state of the movable piece mechanism 25, a cylindrical guide 16 is formed immediately above the spring of the holder main body 10, and a push button 21 is provided inside the guide 16 to prevent the tip portion 21a from coming off the hole 17. Then
Moreover, it is movably inserted through the waterproof rubber 18. Here, the tip portion 21a of the push button 21 is housed in the narrow rectangular groove 15 of the hole portion 11 and is held in the retracted position in contact with the upper surface of the groove 15 in the free state.

Next, the operation of this embodiment will be described. First, by inserting the knife tip electrode 2 into the chuck 31 at the tip of the holder body 10 of the holder 1 and tightening the attachment head 33, the knife tip electrode 2 is electrically connected and attached to the printed circuit board 5. And the holder body 1
By connecting the connector 3 of the code 4 of 0 to the electrosurgical instrument, it becomes possible to energize the female tip electrode 2. Therefore, when the surgeon holds the holder body 10 with his / her hand and does not press the push button 21 of the hand switch mechanism 20 during the operation, the push button 21 retracts upward and the movable piece mechanism 25 moves the movable piece. As shown in FIG. 5, 27 is lifted up by the spring 28 and separated from the contact member 22,
Switch off.

On the other hand, when the operator presses the push button 21 with his / her finger, the push button 21 is moved downward to move the tip portion 21.
By a, the movable piece 27 is pushed down through the spring 28 of the movable piece mechanism 25 as shown in FIG. In this case, when the two are substantially aligned, the force applied by the spring 28 changes, and the movable piece 27 strongly abuts the contact member 22 to generate an operating sound, and the switch is turned on with good response. Can check the operating status. And
In this case, the lifting force of the movable piece 27 by the spring 28 is substantially reduced, so that the switch is kept in the ON state with a slight pressing force by the thumb.

Then, when the operator pushes his thumb off the button 21, the movable piece 27 of the movable piece mechanism 25 moves the spring 28.
The lifting force due to is restored and the body is immediately jumped up. At this time, the movable piece 27 has the width of the width provided inside the holder body 10.
While strongly contacting the upper limit position of the wide rectangular groove 14 and similarly producing an operating sound, the switch is turned off with good response, and the operating sound allows the operator to confirm the operating state. Further, the push button 21 is moved upward by the spring 28, and the tip end portion 21 a is brought into contact with the upper surface of the groove 15 and is moved to the retracted position. In this way, when the operation of pressing and releasing the push button 21 is repeated, the switch is turned on with an operating sound each time,
When turned off, the output of the scalpel tip electrode 2 is changed.

Although the embodiment of the present invention has been described above, the shape of the waterproof rubber 18 can be appropriately changed, and other modifications and changes can be made without changing the gist of the present invention.

[0023]

As described above, according to the present invention, in the electrosurgical knife electrode holder, the hand switch mechanism mounted on the printed circuit board has a coil spring engagement degree by pressing and releasing the push button. Is configured to strongly swing the movable piece,
The operating force during switch operation is significantly lightened, and this can reduce the operator's fatigue during surgery. Further, since the operating sound is generated in accordance with the strong swing of the movable piece, each operating sound is generated when the switch is turned on and off, and the operator can accurately know the operating state during the operation. Therefore, erroneous operations can be reduced.

The holder body has a substantially pentagonal cross-section at the portion to be pinched by the thumb and forefinger, so that it is difficult to slip even if blood adheres to it. Since the movable piece and the tip of the push button are positioned by the groove of the hole inside the holder body, the movable piece is prevented from lateral displacement and falling off, and the push button is always held at a constant retracted position. Since the fixing ring, the chuck holder, the chuck, and the mounting head are sequentially mounted on the tip of the holder body, the assembling property is good, and the printed circuit board and the female tip electrode can be securely electrically connected and fixed.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an embodiment of a scalpel tip electrode holder for electrosurgery according to the present invention.

FIG. 2 is a vertical sectional view of the embodiment.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an exploded perspective view of each part.

5A and 5B are a side view and a plan view of a hand switch mechanism.

FIG. 6 is a side view showing a switch ON state of the hand switch mechanism.

FIG. 7 is a longitudinal sectional view and a lateral sectional view of a conventional example.

FIG. 8 is a vertical cross-sectional view of another conventional example.

[Explanation of symbols]

 1 Electrosurgical scalpel tip electrode holder 2 scalpel tip electrode 5 Printed circuit board 10 Holder body 20 Hand switch mechanism 21 Push button 22 Contact member 25 Moving piece mechanism 26 Supporting member 27 Moving piece 28 Coil spring

Claims (3)

[Claims] 1. A holder main body which is formed in an elongated tubular shape and can be grasped by an operator's hand. A female tip electrode is detachably attached to the tip of the holder main body and is inserted and installed inside the holder main body. In an electrosurgical scalpel tip electrode holder in which a printed circuit board is provided with a hand switch mechanism that is turned on and off by operating a push button with an operator's finger, the hand switch mechanism is electrically connected and fixed to the printed circuit board. A support member having a U-shape in plan view, a movable piece formed in a bifurcated plate shape and swingably attached to the support member so as to come in contact with and separate from a contact member of a printed circuit board, the support member and the movable piece. The movable piece is urged between the contact member and the contact member depending on whether the push button is pressed or not .
An electrosurgical knife tip electrode holder, characterized in that the upper end position of the groove is provided with a coil spring that strongly abuts while generating an operating noise. 2. The holder main body is formed in a substantially pentagonal cross section, and has a semicircular hole therein, a guide for inserting and installing a printed circuit board, and a width for positioning the movable piece of the hand switch mechanism in the left-right direction and the upper limit position. The scalpel electrode holder for electrosurgical use according to claim 1, further comprising a wide groove and a narrow groove for positioning the retracted position of the tip portion of the push button. 3. The holder main body is mounted by screwing a fixing ring inside the tip, and fixing the chuck holder by rotating it, inserting a metal chuck inside the chuck holder, and fixing it by a fixing ring. The electrosurgery according to claim 1, characterized in that a plug of a printed circuit board is connected to the chuck, a scalpel tip electrode is inserted, and the chuck and the chuck holder are attached so as to fix the scalpel tip electrode by fixing a mounting head. Scalpel electrode holder.