JPS625133Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electric scalpel.

An electric scalpel is used in surgery to incise or coagulate living tissue using high-frequency current.In the case of incision, this occurs when high-frequency current is concentrated in a localized area of living tissue from the tip of an active electrode. Steam and other gases are generated within the tissue using Joule heat, and the rapid expansion causes the tissue to be incised. The active electrode used in the electric scalpel has various tip shapes depending on the morphology of the local tissue and the purpose of the surgery, and the active electrode is replaced each time. Also,
The active electrode is also removed from the holder when disinfecting or removing attached carbide.

In the conventional electric scalpel, as shown in FIGS. 1 and 2, the supporting end 11a of the active electrode 11, which has a scalpel needle 11x at the tip, connects the tip of a connecting pipe 13 fixed to a holder 12. The connecting pipe 13 is inserted into the collecting chuck 14 to be formed.
By rotating the clamp pipe 15, which has a threaded part 15a that engages with the threaded part 13a of the clamp pipe 15, the tapered part 15b at the right end of the inner cylindrical part of the clamp pipe 15 in FIG. 14a to compress the collector chuck 14, and as the active electrode 11 is tightened to the collector chuck 14, the holder 1
2 is removably fixed. Collection check 1
4 is electrically connected to a cable 16 supported by the holder 12, and a high frequency current is applied to the active electrode 11 fixed to the collector chuck 14 from a power source (not shown). In addition, as another example of the conventional electric scalpel, as shown in FIG. end 1 widened into a shape
1b into the hole 12a of the holder 12, the spring force generated at the end 11b causes the hole 12 to open.
The conductive member 12b on the circumferential surface of a is in contact with the end portion 11b, and the active electrode 11 is supported by the holder 12.

However, in the conventional electric scalpel shown in Figs. 1 and 2, after many years of use, an oxide film is formed on the fixed part of the active electrode of the connecting pipe, or if dust or the like adheres to the part, this may occur. Since it is difficult to remove, there is a problem that poor contact between the active electrode and the connecting pipe is likely to occur. Furthermore, there is also a problem in that poor contact occurs when an oxide film is formed on the surface of the supporting end of the active electrode. Furthermore, in the electric scalpel shown in Fig. 3, Fig. 1,
In addition to having the same problems as the electric scalpel shown in FIG. 2, there were other problems such as deterioration of the spring force of the supporting end of the active electrode over time, making it difficult to securely fix the active electrode.

The present invention was developed in view of the above problems, and its purpose is to screw together an active electrode holding member having an inner peripheral surface eccentric by a certain length with respect to the rotational axis of the active electrode supporting member with a clamp pipe. In preparation for this, the supporting end of the active electrode is pressed against the active electrode holding member by rotation of the clamp pipe, and the active electrode is fixed to the clamp pipe, so that the active electrode can be attached and removed with simple operations. An object of the present invention is to provide an electric scalpel which can be used in a variety of applications and eliminate poor contact.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Fig. 4, 1 is a cylindrical clamp pipe made of synthetic resin or metal, 3 is a holder whose tip is integrally provided with an active electrode holding member 2, which will be described later, and a male threaded portion 3Y of the holder 3 is clamped. By screwing into the female threaded portion 2Y of the pipe 2, the holder 3 can be coaxially and removably fitted into and fixed to the clamp pipe 1.

The active electrode holding member 2 described above is formed at the tip of the holder 3 into a roughly semi-cylindrical shape with a predetermined length, and when the holder 3 is fitted into the clamp pipe 1, the outer peripheral surface of the active electrode holding member 2 The active electrode holding member 2 is supported in a state in which the active electrode holding member 2 is in rotatable contact with the inner circumferential surface of the clamp pipe 1. The active electrode holding member 2 is
As shown in FIG. 5, which is a view from the arrow, a conductive sliding plate 2a forms a semicircular concave surface with a radius r centered on an axis B that is eccentric by a distance S from the axis A of the clamp pipe 1. The member 2b between the sliding plate 2a and the clamp pipe 1 is made of an insulating material. The above-mentioned sliding plate 2a
The lower end edge in FIG. 5 is bent outward in the radial direction of the sliding plate 2a, and the end edge of the sliding plate 2a fits into the groove 2c provided in the active electrode holding member 2 and slides. A plate 2a is supported. Further, a lead wire (not shown) is connected to the sliding plate 2a through the space of the holder 3 to a predetermined power source (not shown).

Reference numeral 5 denotes a plug made of an insulating transparent material that is removably inserted through a screw 5a provided in the opening at one end of the clamp pipe 1. An insertion hole 7 is provided, through which the active electrode 6 is inserted and fixed. One end of the active electrode 6 has an electric scalpel tip needle 6a, and the other end has a supporting end 6b.

In the above configuration, the method for fixing the active electrode 6 is as follows.

That is, with the active electrode 6 removed, the plug 5 is fitted and fixed to the clamp pipe 1, and on the other hand,
The holder 3 is also screwed onto the clamp pipe 1 to form the state shown in FIG. 4, and the hole 7 of the plug 5 is located in the space c near the active electrode holding member 2 as shown in FIG.
so that it is facing the Note that it is convenient to attach a mark to the holder and clamp pipe to clearly indicate this position.

Then, when the active electrode 6 is inserted into the hole 7 so that the shoulder 6c of the active electrode 6 comes into contact with the stepped surface 7c of the hole 7, the support side end 6b of the active electrode 6
As shown in the figure, the area facing the active electrode holding member 2 is reached.

After that, when the clamp pipe 1 and the holder 3 are rotated relative to each other, for example, the upper clamp pipe 1 in FIG. 5 is rotated clockwise, the supporting end 6b of the active electrode 6 slides as shown in FIG. After reaching just below the upper end of the moving surface 2a and rotating by a certain angle α, the peripheral surface of the support side end 6b of the active electrode 6 comes into contact with the peripheral surface of the sliding surface 2a, and furthermore, the clamp pipe 1
By rotating the support side end 6b of the active electrode 6
is pressed in the direction toward the axis B of the sliding surface 2a while sliding on the sliding surface 2a. In this way, the active electrode 6 is removably fixed to the active electrode support member, that is, the plug 5, by a rotation operation of a slight angle, and the active electrode 6 is in pressure contact with the sliding surface 2a. electrically connected.

As mentioned above, the outer peripheral surface of the active electrode 6 is the sliding surface 2a.
Since they slide together under pressure, oxide films and the like on their contact surfaces are removed, thereby eliminating poor contact. In addition, clamp pipe 1
By turning in the opposite direction (counterclockwise), the active electrode is separated from the sliding surface 2a, and the active electrode can be easily removed.

In the above-described embodiment, a conductive sliding plate was fixed to the semi-cylindrical circumferential surface of the active electrode holding member, but instead of this sliding plate, a hard and thick metal plating may be applied. Further, the shape of the cylindrical portion of the semi-cylindrical circumferential surface may be formed into an inner cam shape such that more effective pressing force is applied by slight rotation.

As described in detail above, this invention involves attaching a plug through which the active electrode of an electric scalpel is inserted to a clamp pipe, and screwing the clamp pipe and holder together, so that when the plug is rotated, the support side end of the active electrode Since the active electrode is pressed into contact with a sliding surface provided eccentrically within the clamp pipe, attachment and detachment of the active electrode is facilitated.

In addition, since the active electrode and the active electrode holding member slide against each other under pressure, the oxide film or deposits such as dust on the mutual contact surfaces of the active electrode and the active electrode holding member are removed, eliminating poor contact. I can do it. Furthermore, the clamp pipe can be removed from the holder and the sliding surface of the active electrode holding member can be easily cleaned. Furthermore, since the structure can be simplified, the electric scalpel can be made smaller.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view showing a conventional example of an electric scalpel.
2 is an exploded view of FIG. 1, FIG. 3 is a partial sectional view showing another conventional example of an electric scalpel, FIG. 4 is a partial sectional view showing an embodiment of the present invention, and FIG. X- in the diagram
The X-arrow view and FIG. 6 are explanatory diagrams of the operation of the present invention. DESCRIPTION OF SYMBOLS 1... Clamp pipe, 2... Active electrode holding member, 3... Holder, 5... Plug, 7... Hole (active electrode insertion hole), 6... Active electrode.

Claims (1)

[Scope of utility model registration request] A plug is provided at one end of the cylindrical clamp pipe, and has an insertion hole that is eccentric by a certain distance with respect to the rotation axis and through which the supporting end of the active electrode is inserted, and the active electrode is inserted into the insertion hole. , an active electrode is mounted parallel to the axis of the clamp pipe and configured such that a portion of the active electrode extends within the clamp pipe, while a semi-cylindrical conductive conductive electrode is mounted eccentrically from the axis of the clamp pipe. A holder provided with an active electrode holding member having a circumferential surface is coaxially fitted into the clamp pipe, and the clamp pipe and the holder are rotated relative to each other, whereby the active electrode is moved into the semi-cylindrical shape of the active electrode holding member. An electric scalpel characterized by being pressed against the inner peripheral surface.