JPS6019687Y2 - heated electric scalpel - Google Patents

Description

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

The basic configuration of the conventionally known heated electric scalpel is shown in Figures 1 and 2.
As shown in the figure, the heating resistor 1 is
A ceramic plate 2 for a heat generating element is provided with metallization on one side of a metal blade plate 3 having a blade portion 3 at the tip.
The brazing method is used to join the resistor 1.
By supplying electricity to the blade plate 4, the blade plate 4 is heated.

Then, the energizing lead 5 of the resistor 1 and the blade plate 4 are covered with synthetic resin from both sides, leaving the terminal end of the lead 5 and the blade part 3, to form a grip part 6. Molded products are commonly used.

However, when using the heating type electric scalpel, when a voltage is applied to the heating resistor 1 to generate heat, the heat is transmitted not only through the blade portion 3 of the blade plate 4 but also through the blade plate 4 or the current-carrying lead 5. For example, if the blade part 3 is to maintain a temperature of 300°C, the gripping part 6 will be heated to approximately 50°C to 200°C, and a special holder or thick heat-resistant Both methods had defects that hindered proper operation of the electric scalpel, requiring the use of rubber gloves.

In addition, there was also a risk that the highly heated part of the gripping section 6 would come into contact with parts other than the patient and cause burns to the patient.

The present invention was devised to solve the above-mentioned drawbacks, and will be explained below based on the embodiment shown in FIGS. 3 and 4.

In addition, in the figure, parts common to FIGS. 1 and 2 are given the same reference numerals.

As shown in FIG. 4, the basic structure of the electric scalpel of the present invention is that a ceramic plate 2 for a heating element having a heating resistor 1 and a ceramic plate 7 different from the ceramic plate 2 are placed facing each other. Metalized metallization is applied to both sides of the metal blade plate 4 as shown in FIG.
Joined using brazing technique.

Providing the ceramic plate 7 means that the brazing of the metal blade plate 4 and the ceramic plate 2.7 exerts an equal shrinkage suppressing effect on both sides of the blade plate 4 when the temperature drops later, thereby preventing warping of the blade plate 4. This is preferable because it can be prevented.

The material of this ceramic plate 7 is preferably the same as that of the ceramic plate 2 for heating element, but it may be a different material as long as the coefficient of thermal expansion is similar.

As shown in FIG. 3, the ceramic plate 2 for heating element has
A heat-resistant ceramic sintered substrate with a pattern of heating resistor 1 printed on it, or a ceramic green substrate.
A sintered body obtained by printing a pattern of the heating resistor 1 on a sheet and heating this at an appropriate firing temperature is used.

At a desired location of the heating resistor 1, a conductive lead 5a made of a brazing material or the like is provided through a metallized layer 8.
5b, 5c, and 5d are attached.

A well-known switching mechanism (not shown) is provided to apply current between two selected electrodes of the plurality of leads, and this switching operation allows the temperature of each part of the blade 3 to be adjusted appropriately. I try to maintain it.

In the electric scalpel of the present invention, the grip part 6 made of synthetic resin
When forming the gripping part 6, it is important to form passages through which a cooling medium such as air or water passes or circulates at appropriate locations within the gripping part 6.

For this purpose, as shown in FIGS. 3 and 4, for example, a pipe 9 made of synthetic resin or the like is arranged above the metal blade plate 4, and this pipe 9 is also made of synthetic resin. The grip portion 6 is formed by covering.

The present invention is not limited to the embodiments described above, and various modifications can be made.

For example, the pipe 9 may be made of metal, ceramic, glass, etc., and depending on the number or shape of lead terminals, a pipe may not be used, but two split resin plates with recesses formed at predetermined positions may be used. The concave portion may form a passage by bonding them together.

With the above-described configuration of the heated electric scalpel of the present invention, the heat conducted to the grip as the temperature of the blade increases is absorbed by the cooling medium in the passage made of pipes, etc., effectively raising the temperature of the grip. is prevented.

This makes it possible to operate the device properly over a long period of time without having to attach a special holder or use thick heat-resistant rubber gloves during surgery, and there is no risk of burns for the patient. It has practical advantages such as:

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a conventionally known heated electric scalpel.
Figure 2 is an enlarged sectional view taken along line X-X in Figure 1, Figure 3 is a front view showing the main parts of the electric scalpel of the present invention, and Figure 4 is the
It is an enlarged sectional view taken along the YY line in the figure. 2: Ceramic plate for heating element, 3: Blade portion, 4: Metallic blade plate, 6: Grip portion, 9: Pipe.

Claims (1)

[Scope of utility model registration request] A metal blade plate having a blade part at the tip and bonded with a ceramic plate for a heating element is coated with a synthetic resin leaving the blade part intact, and a cooling medium is placed inside the grip corresponding to the blade plate. A heated electric scalpel characterized by having a passage formed therein.