JPH0450039Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to an electrode mounting structure for a high-frequency thermotherapy device that applies heat to a cancer tissue, for example, by applying a high-frequency power source to the same.

(b) Conventional technology A high-frequency thermotherapy device has a pair of applicators mounted opposite to each other on a movable arm provided on a support base. It consists of a cooling section that protects the This electrode (the applicator including the cooling part) is firmly fixed to the mounting surface of the electrode fixing part (applicator mounting part) provided on the movable arm by fastening parts such as screws.

When treating cancer affected areas, the location of cancer tissue,
In other words, the size of the pair of electrodes is selected and attached depending on the shallow and deep position inside the living body. for example,
If the cancer tissue is located near the back side of the living body (in a deep position), select a large electrode on the surface of the living body, select a small electrode on the back side of the living body, and install it. By placing the pair of electrodes facing each other across the affected area and applying high-frequency power between the two electrodes, the cancerous tissue on the back side (deep position) of the living body is heated appropriately.

(c) Problems to be solved by the invention Electrodes for high-frequency treatment can be used to efficiently treat cancer-affected areas by appropriately selecting the size of a pair of electrodes according to the location of cancer tissue, and attaching and using them. Heat treatment can be achieved. Therefore, it is desirable that the electrode be able to be easily and quickly attached to the fixed part of the movable arm.

However, conventional high-frequency treatment electrodes employ a method of firmly fixing them to an electrode fixing part using a fastening member such as a screw. Therefore, when replacing and installing electrodes of different sizes for each treatment,
This installation work not only requires a great deal of time and effort, but also has disadvantages such as difficulty in installing large electrodes. In particular, with methods of attaching electrodes using fastening members such as screws, it is difficult to obtain an appropriate tightening torque, and the tightening torque varies depending on the operator, resulting in the electrode falling off due to insufficient tightening. There were disadvantages such as the risk of wear and tear of the tightening part due to poor energization or excessive tightening.

This idea solves the above problems,
It is an object of the present invention to provide a therapeutic electrode mounting structure that allows proper electrode mounting to be carried out extremely simply and quickly.

(d) Means and action for solving the problems In order to achieve this objective, the therapeutic electrode mounting structure of this invention has the following configuration.

The treatment electrode mounting structure consists of an electrode having a groove in its insertion shaft, and an electrode fixing body having a fitting hole into which the insertion shaft of the electrode is removably fitted. A stopper shaft that moves up and down in a direction perpendicular to the fitting hole and that protrudes and retracts from the groove of the electrode insertion shaft, a forward/reverse drive means that rotates the stopper shaft in forward and reverse directions, and a conversion means that moves the rotation of the stopper shaft in a linear manner. and an electrode fixing mechanism.

In the therapeutic electrode mounting structure having such a configuration, the insertion shaft portion of the electrode is inserted into the fitting hole portion of the electrode fixing body. At this time, the stopper shaft positioned perpendicularly to the fitting hole and the groove of the insertion shaft properly correspond to each other. Here, the stopper shaft is rotated by driving the forward/reverse rotating motor and transmitting this rotational force to the stopper shaft via the transmission means. The stopper shaft is lowered in direct motion by means of a rotation-to-linear motion conversion means (the stopper shaft and the shaft elevating receiver are threaded). Then, the tip of the stopper shaft fits into the groove of the insertion shaft, comes into contact with the bottom wall of the groove, and stops. In this state, the electrode is in close contact with the mounting surface of the electrode fixing body and is fixed. On the other hand, when exchanging (removing) the electrode, the stopper shaft is raised by rotating the drive motor in the opposite direction, and is removed from the groove of the insertion shaft. As a result, the electrode insertion shaft is released from the stopper shaft, and the electrode (electrode insertion shaft) can be easily removed from the electrode fixing body.

(E) Embodiment FIG. 4 is a perspective view showing a high frequency thermotherapy device.

The high-frequency thermotherapy device 4 includes a C-shaped arm (a semicircular curved arm) 41, a slider piece 43 protruding from both sides of the C-shaped arm 41, and a slider piece 43 sandwiched between the two. It consists of an arm support 42 to which the mold arm 41 is rotatably attached, and a slide mechanism 44 such as a rail for moving the arm support 42 back and forth relative to the bed on which the patient lies supine. A cylindrical electrode fixing case 1 is fixed to each end of the C-shaped arm 41 in a facing manner, and a pair of applicators,
That is, the electrode 3 integrally provided with the cooling part 33 is detachably attached.

A feature of this invention is that a mounting structure is provided for attaching the electrode 3 to the electrode fixing case 1 in an extremely simple manner.

FIG. 2 is an enlarged perspective view of essential parts showing the interconnection relationship between the electrode 3 and the electrode fixing case 1.

The electrode 3 has a substantially disk shape and has a metal electrode fixing shaft 31 protruding from the center of the inner surface. This conductive electrode fixing shaft 31 is set to have a length corresponding to the depth of the mounting hole 13 of the electrode fixing case 1, which will be described later. A groove portion 32 is formed.

The electrode fixing case 1 is a substantially cylindrical hollow case body, and contains therein an electrode fixing body 11 and an electrode fixing mechanism 2, which will be described later. Further, on the outer surface of the electrode fixing case 1, a forward and reverse rotation motor 2, which will be described later, is provided.
1, and operation keys 1a and 1b for rotating the motor forward or reverse are provided.

The electrode fixing body 11 has one end portion (tip portion) protruding from the opening surface of the case 1, and this protruding portion serves as a mounting surface portion 12, and the fixing shaft 31 of the electrode 3 is inserted into and removed from the mounting surface portion 12. This is the opening of the hole 13. The outer periphery of this mounting surface portion 12 is fixed to the electrode fixing case 1 via a bellows-shaped flexible connector 18, so that the electrode fixing body 11 can be angularly displaced.

FIG. 1 is an enlarged sectional view of a main part showing an electrode mounting structure for high-frequency thermotherapy according to an embodiment.

The electrode fixing body 11 of the electrode fixing case 1 is formed into a substantially cylindrical shape, and has a mounting surface portion 1 at one end (tip).
2 protrudes outward from the case 1, and is provided with a mounting hole 13 penetrating the mounting surface 12 inside. Further, an electrode fixing mechanism 2, which will be described later, is attached to the other end (rear end) of the electrode fixing body 11 via a mounting flange 28.
A forward/reverse rotating gear motor 21 is fixed. Further, above the mounting hole 13, a mounting hole 13 is provided.
A shaft lifting hole 19 that is perpendicular to and communicates with
has been formed. This shaft lifting hole 19 has a threaded portion 26 of a stopper shaft 25, which will be described later.
A shaft elevating receiver 16 having a screw groove 17 that is screwed into the shaft is fitted. That is, the threaded rod of the stopper shaft 25 and the shaft elevation hole 19 constitute a screw pair (conversion means) that converts the rotation of the stopper shaft 25 into linear motion. Further, an electrode contact plate 14 is provided protrudingly below the mounting hole 13, and one end of a power supply line 15 for applying high frequency power to the electrode 3 is attached to this electrode contact plate 14.

The electrode fixing mechanism 2 includes a forward and reverse rotation gear motor (drive means) 21 and a pair of timing pulleys 2.
2, 23, a timing belt 24 wound and tensioned between a pair of pulleys 22, 23, and a stopper shaft 25.

The driving pulley 22 is attached to the rotating shaft of the gear motor 21, and the driven pulley 23 is attached at a position corresponding to the shaft lifting hole 19 of the electrode fixing body 11. The stopper shaft 25 is
A threaded part 26 is formed on the outer circumference of the shaft, and one end (tip part)
A collar plate 27 is attached to the. This stopper shaft 25 has the other end (base end) attached to the driven pulley 23.
and is pressed and fixed by a pin 29 so as to rotate together with the pulley 23, and the tip end is screwed into the thread groove 17 of the shaft lift receiver 16. That is, the stopper shaft 25 is set and arranged at an upper position corresponding to the groove 32 of the electrode fixing shaft 31 in a state where the electrode fixing shaft 31 is fitted into the mounting hole 13. Further, the tip of the stopper shaft 25 is set so as to slightly protrude into the mounting hole 13 in a normal state, so that the electrode fixing shaft 31 can be inserted and removed. Also, stoppashaft 2
When the stopper shaft 25 is raised, the collar plate 27 of No. 5 engages with the shaft lifting receiver 16 and exerts a function of preventing the stopper shaft 25 from coming off.

FIG. 3 is an enlarged sectional view of a main part showing a state in which the electrode 3 is attached to the electrode fixing case 1.

When attaching the electrode 3, select an electrode of an appropriate size and insert the electrode fixing shaft 31 into the attachment hole 13 with the opening side of the groove 32 facing upward.
In this state, the groove portion 32 is positioned appropriately corresponding to the tip end of the stopper shaft 25. Next, when the forward rotation operation key 1a is pressed, the motor 21 rotates, and the driven pulley 23 and stopper shaft 25 rotate at the same time. Then, the rotation of the stopper shaft 25 is lowered by the shaft elevating receiver 16, and the tip of the stopper shaft 25 fits into the groove 32 and comes into contact with the bottom surface (see FIG. 1).
Further, the electrode fixing shaft 31 is pressed against the lower electrode contact plate 14 by the pressing force of the stopper shaft 25, and a proper energized state is maintained.

In this state, the stopper shaft 25
In order to apply a falling pressure to the electrode fixing shaft 31,
The load torque on the motor 21 increases rapidly, and the value of the current flowing through the motor 21 increases rapidly. Although not shown, a comparator in the control circuit provided inside the electrode fixing case 1 compares the rapidly increased current value with a preset reference current value, and compares the rapidly increased current value with a preset reference current value. When this occurs, a stop signal is generated to stop driving the motor 21.
In this way, the electrode 3 maintains a proper energized state and is securely fixed.

On the other hand, when removing the electrode 3, the reverse operation key 1b is pressed. As a result, the motor 21 rotates in the opposite direction, and the driven pulley 23 and stopper shaft 25
Rotate in the opposite direction. As a result, the stopper shaft 25 rises and the tip comes out of the groove 32. While the stopper shaft 25 is being raised, the flange plate 27 is engaged with the shaft elevating receiver 16, thereby preventing the stopper shaft 25 from rising (see FIG. 3). In this state, the load torque of the motor 21 increases, and the value of the current flowing through the motor 21 increases. Here, the rapidly increased current value is compared with a set current value by a comparator, and when the current value exceeds the set value, a stop signal is generated to stop driving the motor 21. Thus, the electrode fixing shaft 31 of the electrode 3 becomes open, and the mounting hole 13
Can be pulled out more easily.

(f) Effects of the invention In this invention, as described above, a groove is formed in the electrode fixing shaft, a mounting hole is provided on the electrode fixing case side into which the electrode fixing shaft can be inserted and removed, and a mounting hole is provided for the electrode fixing shaft. Since we have provided a stopper shaft that moves up and down and appears in and out of the groove, when installing the electrode, the electrode can be quickly installed by simply inserting the electrode fixing shaft into the mounting hole of the electrode fixing case. Can be fixed. Therefore, it is not only possible to omit the troublesome work of fastening screws when exchanging electrodes as in the past, but even large electrodes can be installed in an extremely short time.

Moreover, this invention has a structure in which the stopper shaft is fitted into and removed from the groove of the electrode fixing shaft using a forward and reverse rotating motor, so the electrode is fixed automatically and maintains the proper energization state, preventing the electrode from falling off. It has excellent effects that achieve the purpose of the invention, such as there is no risk of electrical conduction failure.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of main parts showing the electrode mounting structure for high-frequency thermotherapy according to the embodiment, Fig. 2 is a perspective view showing the connection between the electrode and the electrode fixing case, and Fig. 3 is the fixing of the electrode to the electrode. FIG. 4 is an enlarged cross-sectional view of main parts showing a state in which it is attached to a case, and FIG. 4 is a perspective view showing the high-frequency thermotherapy device. 1... Electrode fixing case, 2... Electrode fixing mechanism,
3... Electrode, 11... Electrode fixing body, 16... Shaft lifting receiver, 21... Forward/reverse rotation motor, 25...
... Stopper shaft, 31 ... Electrode fixing shaft, 32
...Mizobe.

Claims (1)

[Scope of utility model registration request] It consists of an electrode with a groove in the insertion shaft, and an electrode fixing body having a fitting hole into which the insertion shaft of the electrode is removably fitted. Equipped with a stopper shaft that moves up and down in orthogonal directions and that moves in and out of the groove of the electrode insertion shaft, an electrode fixing mechanism that includes a forward/reverse drive means for rotating the stopper shaft in forward and reverse directions, and a conversion means for linearly moving the rotation of the stopper shaft. A therapeutic electrode mounting structure consisting of: