JPH0451806Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a treatment electrode angle adjustment mechanism for applying heat treatment to cancerous tissue by applying a high frequency power source.

(b) Prior Art FIGS. 7 and 8 are enlarged perspective views of essential parts of a conventional electrode angle adjustment mechanism.

The electrode angle adjustment mechanism shown in FIG.
A sphere (ball) 73 is fixed to the tip of the ball 2, and a rotatable ring 74 is fitted around the outer circumference of the sphere 73. On the other hand, on the electrode fixing body 75 side, a pair of divided mounting arms 76 are screwed onto one screw shaft 77, and the opposing arms 76 are set to be screwed in opposite directions. To fix the electrode, the electrode ring 74 is inserted between the pair of attachment arms 76, the handle lever 78 is operated to rotate the screw shaft 77, and the electrode ring 74 is clamped and fixed between the pair of attachment arms 76. When changing the angle of the attached electrode 71, the electrode angle is changed by loosening the clamping state of the mounting arm 76, and the electrode is clamped and fixed again by the mounting arm 76 while maintaining this angle.

In the electrode angle adjustment mechanism shown in FIG. 8, a prismatic mounting shaft 82 is provided protruding from the center of the inner surface of an electrode 81, and a ball 84 is freely disposed inside a through hole 83 of this mounting shaft 82. This attachment shaft 82 is attached to the electrode fixing body. Then, the through hole 83 of the mounting shaft 82
The screw shaft 85 is screwed in from above, the support shaft 86 that supports the ball 84 is inserted from below, and the screw shaft 85 is lowered by operating a lever 87 provided at the base end of the screw shaft 85. The ball 84 is pressed and fixed at the tip. When displacing the angle of the electrode 81, operate the lever 87 and tighten the screw shaft 8.
5 to loosen the pressing force of the ball 84 and move the electrode to an arbitrary angle, the ball 84 is again pressed and fixed by the screw shaft 85.

(c) Problems to be Solved by the Invention None of the conventional electrode angle adjustment mechanisms is provided with a means for limiting the angle of electrode movement, that is, a stopper means. Therefore, in order to maintain the stationary state of the attached electrode, it is necessary to fix the electrode attachment portion (electrode attachment shaft portion) with sufficient tightening force to support the weight of the electrode itself.

Therefore, in any of the above mechanisms, when changing the angle of the electrode, the lever (handle) must be operated to loosen the clamping force that kept the electrode stationary.
After making the electrode movable, it is necessary to displace it to a desired angle, maintain this angular state, and fix the electrode again, which has the disadvantage of being troublesome. In particular, when loosening the electrode clamping force, the weight of the electrode itself causes the electrode to tilt downward significantly, so it is necessary to hold the electrode until the angle is set. However, there are disadvantages such as the electrode falling off. In addition, in the conventional mechanism, there is no stopper to limit the range of the electrode movement angle, so if an external force is unexpectedly applied to the electrode while loosening the clamping force and adjusting the electrode angle, the electrode will move around the electrode fixing body. There were disadvantages such as collision with the surface and damage.

This idea solves the above problems,
It is an object of the present invention to provide a treatment electrode angle adjustment mechanism that can maintain an electrode in a stationary state under normal conditions and arbitrarily displace the electrode angle within a certain range when a slight external force is applied.

(d) Means and actions for solving the problem In order to achieve this purpose, this invention has the following structure.

The therapeutic electrode angle adjustment mechanism is provided with an electrode angle adjustment mechanism on an electrode fixing body to which an electrode is attached, and the electrode angle adjusting mechanism includes a ball housing fixedly disposed in a through hole of the electrode fixing body, and a ball housing fixedly disposed in a through hole of the electrode fixing body. A bushing fixed to the accommodation space of the ball housing and having a ball therein; a press screw shaft provided in the ball housing and having a flat spring part whose tip presses the ball; a movable body that can move vertically and horizontally and is fixed to the movable body, an angle limiter that supports the lower part of the movable body and limits vertical and horizontal movements of the movable body, and an angle limiter that is disposed on the angle limiter and supports the ball. It consists of a support shaft.

In the treatment electrode angle adjustment mechanism having such a configuration, the electrode is attached and fixed to the electrode fixing body. The ball placed in the through hole of the electrode fixing body is constantly pressed by a push screw shaft equipped with a flat spring part, and the contact pressure (frictional pressure) between the push screw shaft and the ball corresponds to the weight of the electrode. It has been set. That is, the weight of the electrode is supported by the contact pressure between the push screw shaft and the ball, and the electrode is always held stationary with a variable angle. Therefore, when displacing the electrode to a desired angle, there is no need to loosen the fixed state (pinched state) of the electrode as in the past, and the operator simply grasps the electrode and moves it in the desired direction, such as up and down (vertical direction). ) Alternatively, the electrode, that is, the electrode fixing body, can be moved in any direction by simply moving it in the left and right direction (horizontal direction). When the electrode is moved, the movable body moves on the angle limiter (the contact point between the push screw shaft and the ball moves), and moves vertically and horizontally within the movement limit range.
That is, when the angle of the electrode fixed body integrated with the movable body is displaced and the external force that moves the electrode disappears, the electrode remains stationary. Further, when the movable body moves vertically and horizontally on the fixed angle limiter, the movement thereof is restricted by a stop piece provided on the angle limiter. Therefore, even if a large external force is applied to the electrode, there is no risk that the electrode will collide with the electrode fixing body (mounting surface) and be damaged.

(E) Embodiment FIG. 6 is a perspective view showing a high frequency thermotherapy device.

The high-frequency thermotherapy device 6 includes a C-shaped arm (a semicircular curved arm) 61, a slider piece 63 protruding from both sides of the C-shaped arm 61, and a slider piece 63 sandwiched between the two. It consists of an arm support 62 to which the mold arm 61 is rotatably mounted, and a slide mechanism 64 such as a rail for moving the arm support 62 back and forth, for example, relative to the bed on which the patient lies supine. And, on both sides of the C-shaped arm 61,
Cylindrical electrode fixing cases 1 are fixed to face each other, and a pair of applicators, that is, electrodes 5 integrally provided with a cooling section 53, are detachably attached to the end faces of the electrode fixing cases 1.

FIG. 3 is an enlarged perspective view of a main part showing the interlocking relationship between the electrode 5 and the electrode fixing case 1.

The electrode 5 has a substantially cylindrical shape and has a metal (conductive) electrode fixing shaft 51 protruding from the center of the plane, and the fixing shaft 51 has a groove 5 notched in the width direction at the center of the upper surface.
2 is formed.

The electrode fixing case 1 is a hollow case body having a substantially cylindrical shape, and a mounting surface portion 16 for the electrode fixing body 11 housed therein is exposed. The electrode fixing body 11 is provided with a mounting hole 12 into which the electrode fixing shaft 51 is inserted. In addition, the outer peripheral portion of the mounting surface portion 16 has a flexible connector (rubber membrane) 19 in the shape of a bellows.
The flexible connecting body 19 is fixedly attached to the electrode fixing case 1 through the electrode fixing body 11.
is set to expand and contract.

FIG. 1 is an enlarged cross-sectional view of a main part showing an electrode angle adjustment mechanism for high-frequency thermotherapy according to an embodiment.

Electrode fixing body 11 housed in electrode fixing case 1
is formed into an almost cylindrical shape, and one end (mounting surface part 1
An electrode mounting hole 12 is opened on the 6) side, and a through hole 15 for adjusting the electrode angle in a direction perpendicular to the electrode mounting hole 12 is opened on the other end side.

The electrode mounting means 2 has a shaft elevating screw tube 21 disposed above the electrode mounting hole 12, and a stopper shaft 22 is screwed into the shaft elevating screw tube 21. This stopper shaft 22 is raised and lowered by forward and reverse rotation via a forward and reverse rotation motor 23 and a transmission means (a pair of pulleys 24 and a belt 25), and is moved up and down by a groove 62 of an electrode fixing shaft 61 inserted into the electrode mounting hole 12. The electrodes 6 are set to appear and appear in the area to fix the electrodes 6. Furthermore, an electrode plate 17 connected to the power supply line 18 is exposed at the lower part of the electrode mounting hole 12 and is set to come into contact with the electrode fixing shaft 61 .

The feature of this invention is that the through hole 1 of the electrode fixing body 11
5 is provided with an electrode angle adjusting means 3.

The electrode angle adjustment means 3 includes a ball housing 31 in which a ball 38 is arranged, a push screw shaft 39 that presses the ball 38, and a ball housing 31.
It is composed of a movable body 41 that is fixed to and moves vertically and horizontally on an angle limiter 45.

The ball housing 31 has a housing empty chamber 32
A screw hole cylinder 33 is provided in a protruding manner and communicates with the. Then, a ball 38 is inserted into this housing cavity 32.
A bushing 34 equipped with this is screwed on. Bushiyu 34
is equipped with a ball hole 35 corresponding to the ball 38, and has openings 36 at the top and bottom that communicate with the ball hole 35,
37 is open. The push screw shaft 39 is provided with a flat spring portion 40 at the center of the shaft length, and is screwed into the screw hole cylinder 33, and presses the ball 38 through the opening 36 of the bush 34 at the shaft tip.

The movable body 41 is fixed to the ball housing 31 via this bush 34, and the lower part of the movable body 41 is supported by an angle limiter 45. Further, the angle limiter 45 is provided with a support shaft 48 that supports the ball 38 protruding from the lower opening 37 of the bush 34. This support shaft 48 and the push screw shaft 39 equipped with the flat spring portion 40 press the ball 38 from above and below toward the center of the ball 38, and the contact friction pressure between the push screw shaft 39 and the ball 38 causes the electrode to be fixed. Adjustments are made to maintain the body 11)5 in a stationary state.

FIG. 2 is an enlarged perspective view showing the movable body 41 and the angle limiter 45. FIG.

The movable body 41 is formed into a flat prismatic shape with a circular hole 42 in the center. Then, the lower parts of both side walls are lowered from both ends toward the center,
A mortar-shaped (funnel-shaped) inclined surface part 4 with a protruding center part
3,43a are formed. In the embodiment, the inclination angle of the inclined surface portions 43, 43a is set to about 10 degrees. Furthermore, the lower portions of both end walls of the movable body 41 are formed with cutout recesses 44 having a downward opening.

The angle limiter 45 is formed into a disk shape with a square hole 46 in the center of the plane, and two stop pieces 47 each having a substantially trapezoidal planar shape are disposed on the top surface of the stop piece 47, facing each other with the square hole 46 in between. It is set up protrudingly. This stop piece 47 is formed smaller than the notch recess 44, and the movable body 41 is placed on the angle limiter 45 when the notch recess 44 of the movable body 41 is fitted into the stop piece 47. In the supported state, until the side walls 44a, 44b of the notch recess 44 abut against the inclined side walls 47a, 47b of the stop piece 47,
The movable body 41 is set so as to be able to move laterally.

This angle limiter 45 is fixed to the electrode fixing case 1 by a fixing shaft 49 whose one end is fixed to a square hole 46 (see FIG. 1).

In the electrode angle adjustment mechanism for high frequency thermotherapy having such a configuration, the through hole 15 of the electrode fixing body 11
The ball 38 disposed inside is pressed by the push screw shaft 39 equipped with a flat spring portion 40, and the contact pressure (frictional pressure) between the push screw shaft 39 and the ball 38 is
It is set in accordance with the weight of the electrode 5. Therefore, the electrode 5 attached to the electrode fixing body 11 is always kept in a variable and stationary state.

FIG. 4 is an explanatory diagram showing a state in which the electrode (electrode fixing body 11) 5 is pushed upward.

In the normal state, the lower part of the movable body 41 has central protrusions at the lower parts of both side walls in contact with the upper surface of the angle limiter 45;
The inclined surfaces 43, 43a on both sides are spaced apart. By pushing up the electrode 5, the inclined surface portion 43a tilts toward the angle limiter 45 surface. In other words, the contact point between the ball 38 and the push screw shaft 39 moves. When the inclined surface portion 43a completely contacts the angle limiter 45 surface, the electrode fixed body 11 is elevated by about 10 degrees, and the limiter 45 surface prevents the movable body 11 from further upward movement. Furthermore, when the external force applied to the electrode 5 in this state (external force greater than the contact friction force between the push screw shaft 39 and the ball 38) is removed, the electrode (electrode fixing body 11) 5 remains stationary due to this contact friction force. do.

FIG. 5 is an explanatory diagram showing a state in which the electrode (electrode fixing body 11) 5 is tilted downward and rotated to the left.

In this case, contrary to the case of FIG. 4 described above, the inclined surfaces 43 of both side walls of the movable body 41 are in contact with the upper surface of the angle limiter 45, and the inclined surfaces 43a are spaced apart. As a result of the movable body 41 being rotated to the left, the side wall 44a of the notch recess 44 on the front end side comes into contact with the inclined side wall 47a of the corresponding stop piece 47, and the side wall of the notch recess 44 on the rear end side comes into contact with the inclined side wall 47a of the corresponding stop piece 47. 44b abuts against the inclined side wall 47b of the corresponding stop piece 47. This restricts the leftward rotation of the movable body 41.

Thus, for the electrode (electrode fixing body 11) 5,
By applying an external force greater than the contact friction force between the ball 38 and the push screw shaft 39, the contact point between the push screw shaft 39 and the ball 38 moves in the direction of the external force, and the movable body 41 moves on the angle limiter 45 within a certain range. It moves up and down and left and right. Then, when the external force is released, the electrode 5 remains stationary at an arbitrary angle.

(f) Effects of the invention In this invention, as described above, a through hole is formed in the electrode fixing body, a ball housing is attached to this through hole, and the ball in the ball housing is moved by a push screw shaft equipped with a flat spring part. Since the movable body that presses and moves vertically and horizontally on the angle limiter is fixed integrally to the ball housing, the electrode attached to the electrode fixing body always remains stationary with a variable angle. By simply moving the electrode in any direction, the movable body moves up and down and left and right within a certain range on the angle limiter, allowing the electrode angle to be freely changed. Therefore, unlike the conventional method, the work of releasing the clamping force of the electrode fixing shaft every time the electrode angle is displaced can be omitted, but the angle limiter properly regulates the moving angle of the electrode. Therefore, there is no risk of the electrodes being damaged due to movement of the electrode angle, and the invention has excellent effects that achieve the purpose of the invention.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of the main part showing the electrode angle adjustment mechanism for high-frequency thermotherapy according to the embodiment, FIG. 2 is an enlarged perspective view of the main part showing the movable body and the angle limiter, and FIG. 3 is the electrode and A perspective view showing the attachment relationship with the electrode fixing case, FIG. 4 is an explanatory diagram showing the electrode fixing body angularly displaced upward, and FIG. 5 is an explanatory diagram showing the electrode fixing body rotationally displaced to the left. Explanatory diagram showing the state, No. 6
The figures are a perspective view showing a high-frequency thermotherapy device, FIG. 7 is a perspective view showing a conventional electrode angle adjustment mechanism, and FIG. 8 is a perspective view showing a conventional electrode angle adjustment mechanism.
The figure is a perspective view showing another conventional electrode angle adjustment mechanism. 1... Electrode fixing body, 2... Electrode attachment means, 3...
... Electrode angle adjustment means, 15 ... Through hole, 31 ...
Ball housing, 38...Ball, 39...Press screw shaft, 40...Flat spring portion, 41...Movable body, 45...Angle limiter, 48...Ball support shaft.

Claims (1)

[Claims for Utility Model Registration] An electrode fixing body to which an electrode is attached is equipped with an electrode angle adjusting mechanism, wherein the electrode angle adjusting mechanism includes a ball housing fixedly disposed in a through hole of the electrode fixing body, and the ball housing. a bushing fixed to the housing cavity and having a ball inside; a press screw shaft disposed in the ball housing and having a flat spring part whose tip presses the ball; and a push screw shaft fixed to the ball housing via the bushing. a movable body that can move vertically and horizontally; an angle limiter that supports the lower part of the movable body and limits the vertical and horizontal movements of the movable body; and a support shaft that is disposed on the angle limiter and supports the ball. A treatment electrode angle adjustment mechanism consisting of.