JPH067366A - Gripping forceps - Google Patents

Abstract

PURPOSE:To operation, act as stoppers effective in both opening and closing operation, act as stoppers effective in both opening and closing directions and can adjust the positions of the stoppers. CONSTITUTION:A stationary operation handle 28 is provided at the base end of a sheath 24. The stationary operation handle and a moving operation handle 30 are freely turnably connected. A connecting rod 41 is engaged with the moving operation handle 30 so that the handle is made freely movable into and out of the stationary operation handle 28. An operation shaft 33 is connected by screwing to the connecting rod 41 and a forceps part is connected to the front end of the operatic shaft 10. The connecting rod 41 and the part of the stationary operation handle 28 to be inserted with the connecting rod 41 are provided with the first stopper part 11 and second stopper part 12 freely adjustably regulating the forward terminal and backward terminal of the connecting rod 41, by which the stoppers for opening and closing the moving operation handle are constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to, for example, laparoscopic surgery (laparoscopic surgery).
The present invention relates to grasping forceps used when grasping a biological tissue or the like.

[0002]

2. Description of the Related Art Conventionally, as this type of grasping forceps, there is one shown in Japanese Utility Model Laid-Open No. 1-133907.
In this, a pair of gripping members are provided at the distal end of a sheath to be inserted into the abdominal cavity through an outer tube of a trocar device so as to be openable and closable, and an operation unit for opening and closing the pair of gripping members is provided at a proximal end of the sheath. ing. An operation shaft is inserted through the sheath, and the tip of the operation shaft is connected to a pair of gripping members via a link mechanism. Further, the operation portion is composed of a fixed operation handle fixed to the proximal end portion of the sheath and a movable operation handle rotatably attached to the fixed operation handle by a setscrew pin.

The rear end of the operating shaft is connected to the rotating end of the movable operating handle. Therefore, when the movable operation handle is rotated about the set screw pin as a fulcrum, the operation shaft slides in the front-rear direction to open and close the pair of gripping members via the link mechanism. In this way, the pair of gripping members are opened and closed by remote operation in the operation unit, and the living tissue in the body cavity,
For example, it grasps or releases an organ such as the gallbladder.

[0004]

By the way, in particular, in such grasping forceps, when the movable operation handle of the operation portion is rotated, it is rotated more than necessary to close the tip grasping portion with a large force. When operated, it may damage the organs. In particular, in laparoscopic surgery, treatment is often performed with other instruments while grasping an organ such as the gallbladder with grasping forceps. In such a case, the surgeon's attention tends to concentrate on the instrument being treated, so measures should be taken to ensure safety even if the movable operation handle of the grasping forceps is accidentally squeezed tightly. There must be.

Therefore, in the above-mentioned conventional device,
A stopper pin is integrally provided on the surface of the fixed operation handle that faces the movable operation handle so that when a large force is applied when the movable operation handle is closed, the movable operation handle abuts the protruding tip of the stopper pin. However, the gripping forceps are prevented from being applied with an excessive gripping force.

However, in such a conventional grasping forceps, since the stopper pin projects from the portion of the fixed operation handle, it may be an obstacle in operation. Also, the stopper pin effectively acts when closing the tip grip portion, but does not have any action when opening the tip grip portion.

Further, since the protrusion amount of the stopper pin is fixed, the contact position of the movable operation handle is always constant. However, in reality, there are various forms of the ecological tissue to be grasped, and it is often convenient in use to be able to adjust the stopper position.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to prevent an obstacle in gripping operation, to provide an effective stopper action in both directions of opening and closing the movable operation handle, and An object of the present invention is to provide a grasping forceps whose stopper position can be adjusted.

[0009]

Means for Solving the Problems In order to solve the above problems, a grasping forceps according to the present invention is a sheath having a distal end portion provided with an openable and closable distal end grasping portion, and a fixing provided at a proximal end portion of the sheath. An operation handle, a movable operation handle that is rotatably connected to the fixed operation handle, one end is connected to a rotation operation end of the movable operation handle, and the other end side is advanced and retracted into the fixed operation handle and the sheath. An operation shaft that is freely inserted and the other end is connected to the tip grip portion, and an operation shaft that opens and closes the tip grip portion by advancing and retracting movement accompanying the rotation operation of the movable operation handle, and a fixing operation through which the operation shaft is inserted. A first stopper portion provided at a handle portion for restricting a forward end of the operation shaft, and a rearward end end of the operation shaft provided at a fixed operation handle through which the operation shaft is inserted. That the second; and a stopper portion, at least one of the stopper portion of the first stopper portion and the second stopper section has a modified adjusted freely configure a moving end position of the operating shaft.

[0010]

According to the present invention, since the first stopper portion and the second stopper portion are provided at the portion of the fixed operation handle through which the operation shaft is inserted, it is difficult for each stopper portion to interfere with the operation of the grasping forceps. Also, the movement end position of the operation shaft can be changed and adjusted.

[0011]

1 and 2 show a first embodiment of the present invention. FIG. 1 shows a configuration of a main part of the grasping forceps 1, and FIG. 2 shows an overall configuration of the grasping forceps 1.

The grasping forceps 1 includes an inserting portion 2 which is inserted into a body cavity through a trocar outer tube, a forceps portion (tip grasping portion) 3 provided at a tip of the inserting portion 2 and a base end of the inserting portion 2. And an operation section 4 provided in the section.

The insertion portion 2 is formed of a hollow tubular sheath 24 made of a metallic material such as stainless steel, and the outer surface of the sheath 24 is covered with an insulating tube 25 made of an insulating material, for example, fluorine resin. ing.

The forceps section 3 is for holding an organ in a body cavity, such as a gallbladder, and is rotatably supported via a link mechanism 26 provided at the distal end of the sheath 24. The forceps members (grip members) 27a and 27b are formed.

The operation section 4 includes forceps members 27a and 27b.
A fixed operation handle 28 fixed to the proximal end portion of the sheath 24, and a movable operation handle 30 rotatably attached to the fixed operation handle 28 by a setscrew pin 29. Is formed by.

As shown in FIG. 2B, a washer 31 is fitted in the set screw pin 29, and the head of the set screw pin 29 is made of an electrically insulating material such as rubber or plastic. The cap 32 is attached by means such as adhesion or snap fit.

Again, as shown in FIGS. 1 (A) and 2 (A), the grasping forceps 1 has an operating shaft 10 for connecting the forceps portion 3 and the operating portion 4. The operating shaft 10 is inserted into the sheath 24 so as to be able to move back and forth, and the tip of the operating shaft 10 is integrally connected to a connecting member 34, and the link mechanism 26 is connected via the connecting member 34. Are linked to. On a part of the peripheral surface of the connecting member 34,
The O-ring 35 is fitted. The O-ring 35 is interposed between the peripheral surface of the connecting member 34 and the inner surface of the sheath 24 so as to maintain airtightness and watertightness from the distal end side of the insertion portion 2 of the grasping forceps 1 to the inside thereof. There is.

On the other hand, as shown enlarged in FIG.
An insertion portion guide hole 36, into which the sheath 24 is fitted via an insulating tube 25, and a rod storage hole 37 having a diameter smaller than the insertion portion guide hole 36 are provided on the upper portion of the fixing operation handle 28 from the distal end side thereof. Further, a through hole 38 having a diameter smaller than that of the rod housing hole 37 is continuously provided on a straight line.

In the insertion portion guide hole 36, an abutting pipe 39 for preventing the electrically insulating tube 25 from coming out toward the front side is fitted into the end portion of the sheath 24. The rear end portion 39 a of the butting pipe 39 is formed in a brim shape that engages with the rear end surface of the sheath 24 and has an inner peripheral surface having a smaller diameter than the rod housing hole 37.

The operation shaft 10 has such a length that the base end portion of the shaft body 33 thereof protrudes from the end portion of the sheath 24 and further protrudes from the fixed operation handle 28 via the rod housing hole 37 and the through hole 38. .

A connecting rod 4 is provided at the base end of the shaft body 33.
1 is connected. A male screw 40 is formed on the outer periphery of the base end portion of the shaft body 33, and a female screw 42 is formed on the connecting rod 41 along the central axis thereof. Then, the male screw 40 of the shaft body 33 is screwed into the female screw 42 of the connecting rod 41 and screwed together, whereby the shaft body 33 and the connecting rod 41 are connected in a straight line to form the operating shaft 10.

Therefore, the shaft body 33 of the operating shaft 10 and the connecting rod 41 are integrated and move forward and backward together. Further, by rotationally operating the connecting rod 41 in the circumferential direction, the relative positional relationship between the male screw 40 and the female screw 42 in the axial direction is changed, and the operating shaft 10 is connected to the shaft body 33. The position of the rod 41 can be changed back and forth along the axial direction.

The connecting rod 41 has a large-diameter portion 41a, a small-diameter portion 41b, and a spherical portion 41 in order from the front end side to the rear end side.
c are integrally formed and continuously formed. The large diameter portion 41a is loosely fitted in the rod housing hole 37, and the small diameter portion 41b is loosely fitted in the through hole 38. In the state where the connecting rod 41 is advanced toward the tip side, the tip surface of the large diameter portion 41a comes into contact with the rear end portion 39a of the butting pipe 39, and the forward end of the operating shaft 10 is thereby fixed. It constitutes a first stopper portion 11 for regulating.

Further, when the connecting rod 41 is advanced toward the rear end, the step which is the boundary between the large diameter portion 41a and the small diameter portion 41b becomes the step formed between the rod receiving hole 37 and the through hole 38. They come into contact with each other, and with these, the operation shaft 10
A second stopper portion 12 that regulates the trailing end of the vehicle is formed.

That is, the first stopper portion 11 regulates the forward end of the connecting rod 41, and the second stopper portion 12 regulates the backward end of the connecting rod 41. By rotating the connecting rod 41 in the circumferential direction with respect to the shaft body 33 of the operation shaft 10, the relative positional relationship in the axial direction between the male screw 40 and the female screw 42 changes due to the screwing relationship. By moving the position of the connecting rod 41 with respect to the operating shaft 10 forward and backward along the axial direction, the front and rear movement end positions of the operating shaft 10 can be changed and adjusted.

On the other hand, O is formed on a part of the peripheral surface of the large diameter portion 41a.
The ring 44 is fitted, and the O-ring 44 comes into close contact with the inner peripheral surface of the rod housing hole 37. The small diameter portion 41b projects rearward from the rear end surface of the fixed operation handle 28. The peripheral surface of the small diameter portion 41b is covered with a heat shrinkable tube 45 made of, for example, a fluororesin material.

As shown enlarged in FIG. 1B, the fixed operation handle 2 is provided at the operation end of the movable operation handle 30.
A long engagement groove 46 is formed in the wall surface portion facing 8 in the vertical direction. The spherical portion 41c is fitted and engaged in the engagement groove 46. Therefore, when the movable operation handle 30 is rotated around the set screw pin 29 as a fulcrum, the movable shaft 30 slides while maintaining the state in which the spherical portion 41c is engaged with the engagement groove 46, and the operation shaft 1
Move 0 back and forth. As a result, the operating shaft 10 including the shaft main body 33 and the connecting rod 41 is integrally driven back and forth.

A through hole 47 is formed in a part of the peripheral wall of the butting pipe 39. Further, a hole 48 having a V-shaped cross section is provided in the peripheral wall portion of the sheath 24 facing the through hole 47. Further, a screw hole 49 is provided in a portion of the fixed operation handle 28 facing the through hole 47, and an electrode pin 50 is screwed into the screw hole 49.

The tip of the electrode pin 50 is formed in a conical shape, and is inserted into the through hole 47 of the butting pipe 39 and is inserted into the hole 48 of the sheath 24 and locked. The electrode pin 50 is for connecting a cord that transmits a high-frequency current from a high-frequency power source (not shown), and is made of a metal material such as a stainless material.

Next, the operation of the gripping forceps 1 thus constructed will be described. First, the fixed operation handle 2
When the movable shaft 30 is opened and closed to move the operation shaft 10 forward and backward, the link mechanism 26 acts to open and close the forceps members 27a and 27b of the forceps part 3.

Specifically, when the movable operation handle 30 is rotated in the counterclockwise direction in the figure, that is, in the direction of opening with respect to the fixed operation handle 28, with the set screw pin 29 as a fulcrum, the operation shaft 10 moves forward. By sliding, the forceps members 27a and 27b of the forceps part 3 are opened via the link mechanism 26. In this state, the forceps part 3 is made to face the living tissue to be grasped in the body cavity.

Then, when the movable operation handle 30 is rotated clockwise in the drawing, that is, in the direction in which it is closed with respect to the fixed operation handle 28, the operation shaft 10 slides backward.
Therefore, the link mechanism 26 closes the forceps members 27a and 27b, and thus can grasp the living tissue.

Incidentally, when the movable operation handle 30 is operated in advance and the forceps members 27a and 27b are in an ideal closed state in which an excessive force is not applied, the connecting rod 41 of the operation shaft 10 is used.
Is screwed with respect to the shaft body 33, and the connecting rod 41 is adjusted so as to come into a position where it abuts on the second stopper portion 12.

By doing so, the forceps members 27a,
Even when the movable operation handle 30 is rotated more strongly than necessary at the time of closing 27b, the second stopper portion 12 causes the backward end of the connecting rod 41, that is, the backward end of the operating shaft 10. The forceps members 27a, 27
It is possible to prevent damage to an organ without applying an extreme force to b. Further, the forceps portion 3 can be prevented from being damaged.

When the movable operation handle 30 is rotated in the opening direction, the connecting rod 41 moves forward and finally the first stopper portion 11 acts. That is, the forward end of the connecting rod 41 is restricted and the forceps member 2
The opening angle of 7a and 27b is regulated. Forceps member 27
Even when the movable operation handle 30 is rotated with a larger force than necessary when the a and 27b are opened, the forceps portion 3 is not subjected to an unnecessary force, and this damage can be prevented. . In addition, the forceps 3 is not opened more than necessary.

When adjusting the opening amount of the forceps portion 3, the connecting rod 41 of the operating shaft 10 is connected to the shaft body 33.
The connecting rod 41 is screwed to change the position of the connecting rod 41. For example, when the connecting rod 41 is moved forward, the opening angle between the forceps members 27a and 27b becomes smaller. vice versa,
When the connecting rod 41 is moved to the rear side, that is, the rear side, the opening angle between the forceps members 27a and 27b can be increased.
In this way, the grasping forceps 1 can be adjusted to the optimum opening angle corresponding to the living tissue to be grasped.

Since the large diameter portion 41a of the connecting rod 41 is fitted with the O-ring 44 and is brought into close contact with the inner peripheral surface of the rod accommodating hole 37, the airtightness and watertightness of the inside of the operating portion 4 can be maintained. .

When the operating portion 4 is operated, the connecting rod 4
The particularly small diameter portion 41b of 1 is exposed from between the fixed operation handle 28 and the movable operation handle 30, but since it is covered with the heat-shrinkable tube 45, even if a high-frequency current is applied to the grasping forceps 1, even if it makes contact with the grasping forceps 1. Even if you do
No accident such as burns.

Further, as shown in FIG. 2 (B), when the set screw pin 29 is attached, the set screw pin 29 is screwed into the fixed operation handle 28 with, for example, a flat-blade screwdriver and fastened until it comes into contact with the end face of the washer 31. Then, the insulating cap 32 is fitted into this head.

When the set screw pin 29 is screwed in,
Even if it is tightened with an extremely strong force, the insulating coating layer is not directly formed on the head of the set screw pin 29, so that there is no need to worry about peeling of the insulating coating layer. Moreover, since the head is covered with the insulating cap 32, a reliable insulating effect can be maintained.

In the first embodiment, the small-diameter portion 41b and the spherical portion 41c of the connecting rod 41 are integrally connected, but the present invention is not limited to this, and the small-diameter portion 41b is a separate body. Alternatively, the small diameter portion 41b may be screwed into the spherical portion 41c to form a spherical portion 41c and a separate structure of screw connection type.

Further, in the above-mentioned embodiment, the insertion portion 2 and the forceps portion 3 are arranged linearly, but the present invention is not limited to this, and other arrangements as shown in FIG. 3 and FIG. The configuration of the embodiment may be adopted.

First, the second embodiment shown in FIG. 3 will be described. As shown in FIGS. 3A and 3B, the inserting portion 2 of the grasping forceps 1 has a large diameter inserting portion 51. Small diameter insertion part 5
2 and.

As shown in FIG. 1A, in the side view of the grasping forceps 1, the large diameter insertion portion 51 and the small diameter insertion portion 52 have the central axes Oa and Ob aligned with each other. However, in the plan view as shown in FIG. 6B, the central axes Oa and Ob of the large diameter insertion portion 51 and the small diameter insertion portion 52 are eccentric.

Further, a forceps portion 3 is provided at the tip of the small diameter insertion portion 52. The pair of forceps members 53a and 53b forming the forceps part 3 are formed in a straight line shape with each other and are driven to open and close in the vertical direction in the side view shown in FIG. There is no difference from the example.

In the plan view shown in FIG. 1B, the pair of forceps members 53a and 53b forming the forceps portion 3 are curved. That is, on the base end side connected to the small-diameter insertion portion 52, it is straight along the small-diameter insertion portion 52,
It is gradually bent toward the tip. However, the most distal end portion should not exceed the maximum outer diameter line Oc of the large diameter insertion portion 51.

The gripping forceps 1 thus constructed is
When inserting into a trocar outer tube (not shown) having an inner diameter equal to the outer diameter of the large-diameter insertion portion 51, the forceps member 53
Since the tips of a and 53b are bent within a range that does not exceed the maximum outer diameter line Oc of the large diameter insertion portion 51, they can be smoothly inserted into the trocar outer tube.

When the living tissue is grasped by inserting these into the abdominal cavity, since the tips of the forceps members 53a and 53b are bent, the grasping target portion is on the back side of the blood vessel or ureter. However, it will be easy to approach.

FIG. 4A shows a third embodiment of the present invention, which is configured to obtain the same effect as the above. That is, since the insertion portion 2 of the grasping forceps 1 shown in FIG. 4A is configured in the same manner as that described in FIG. 3, the same numbers are given and a new description is omitted. Forceps part 3
The pair of forceps members 54a and 54b are formed by bending an obtuse angle from a straight base end portion.

FIG. 4B shows a fourth embodiment of the present invention. The insertion part 2 of the grasping forceps 1 is configured in the same manner as that described in FIG. In the forceps portion 3, the pair of forceps members 55a and 55b have a straight base end portion whose length is made longer to some extent, and the tip end portion thereof is curved with a shape having a small radius of curvature.

Any of the forceps members 54a, 54b, 55
The tips of a and 55b are set so as not to exceed the maximum outer diameter line Oc of the large diameter insertion portion 51. As a result, the trocar can be smoothly inserted into the mantle, and the blood vessel and the living tissue on the back side of the ureter can be grasped without difficulty, as in the case described above.

FIG. 5 shows the structure of the essential parts of the grasping forceps 1 according to the fifth embodiment of the present invention. The basic configuration is the above-mentioned first
The embodiment is substantially the same as the embodiment described above, except for the following points. That is, the male screw 40 provided on the base end portion of the shaft body 33 that constitutes the operation shaft 10, and the connecting rod 4 for screwing the male screw 40 thereto.
The female screw 42 of 1 was lost. Instead of this, the base end portion of the shaft body 33 is provided with three through holes 61a, 61b, 61c that penetrate the shaft body 33 in the axial direction at predetermined intervals.

Further, the small diameter portion 41b of the connecting rod 41 is provided with a through hole 62 having a dish-shaped end portion 62a. The through hole 62 and the through hole 61a,
A pin 63 having a dish-shaped head 63a is inserted over one of the 61b and 61c, for example, the through hole 61b, and the shaft body 33 and the connecting rod 41 are connected.

This also has the same function as that of the first embodiment, but by inserting the pin 63 into any one of the through holes 61a, 61b, 61c, the connecting rod 41 is connected to the shaft body 33. The connection position can be adjusted and fixed in the axial direction. As a result, the respective end positions of the first stopper portion 11 and the second stopper portion 12 are moved to the operation shaft 10
It is adjustable in the axial direction.

In the fifth embodiment, the through hole 61
Although a, 61b, and 61c are three, any number may be selected depending on the degree of adjustment of the first stopper portion 11 and the second stopper portion 12.

FIG. 6 shows the construction of the essential parts of the grasping forceps 1 according to the sixth embodiment of the present invention. The configuration of the grasping forceps 1 of this embodiment is almost the same as that of the first embodiment described above, but the following points are different. That is, the male screw 40 provided at the base end portion of the shaft body 33 that constitutes the operation shaft 10 and the female screw 42 of the connecting rod 41 for screwing the male screw 40 are eliminated. Instead, the peripheral wall portion of the small diameter portion 41b of the connecting rod 41 is provided with a screw hole 65 penetrating to the inner hole thereof, and a set screw 67 having a head portion 66 is screwed into the screw hole 65. By pressing the tip of the set screw 67 against the outer peripheral surface of the shaft body 33, the shaft body 33 and the connecting rod 41 are fixed at an arbitrary insertion position.

The basic function of this is the same as that of the embodiment described above, but by loosening the screw of the set screw 67, the connecting rod 41 becomes movable in the axial direction with respect to the shaft body 33. As a result, the respective end positions of the first stopper portion 11 and the second stopper portion 12 can be moved in the axial direction of the operation shaft 10. Further, the set screw 67 can be tightened at a predetermined position to fix the connecting rod 41 to the shaft body 33. According to this, since the tightening position of the set screw 67 can be arbitrarily selected, the end position thereof can be continuously selected.

FIG. 7 shows the construction of the essential parts of the grasping forceps 1 according to the seventh embodiment of the present invention. The configuration of the grasping forceps 1 of this embodiment is almost the same as that of the first embodiment described above, but the following points are different. That is, the male screw 40 provided at the base end portion of the shaft body 33 that constitutes the operation shaft 10 and the female screw 42 of the connecting rod 41 for screwing the male screw 40 are eliminated. Instead, connect the connecting rod 41 to the front and rear in the axial direction.
Divide into the body, the member on the tip side is the first connecting rod 71,
The proximal member is the second connecting rod 72. A shaft fastening portion 70 is formed by forming a plurality of slits (slits) 73 at the proximal end portion of the first connecting rod 71. A male screw 74 is formed on the outer periphery of the central portion of the first connecting rod 71.

On the other hand, a female screw 75 into which the male screw 74 of the first connecting rod 71 is screwed is formed in the inner hole of the tip side portion of the second connecting rod 72. The female screw 75 is formed up to the vicinity of the center of the second connecting rod 72, and a first slope (tapered portion) 76 is formed near the end of the female screw 75 so that the diameter thereof becomes smaller toward the proximal side. ing. The first slope (taper portion) 76 is provided so as to face a second slope (taper portion) 77 that is also formed on the outer circumference of the inner end of the first connecting rod 71.

The basic function of this is the same as that of the above-mentioned embodiment, but here the first connecting rod 71 is used.
The male screw 74 and the female screw 75 of the second connecting rod 72 are screwed in, and the second connecting rod 72 is moved in the axial direction with respect to the first connecting rod 71.
By pressing 6 against the second slope 77, the inner diameter of the shaft tightening chuck portion 70 having the slit 73 is reduced, and the outer circumference of the central portion of the first connecting rod 71 is tightened. For this reason, the shaft tightening chuck part 70 comes into strong contact with the peripheral surface of the shaft body 33, whereby the first tightening chuck part 70 comes into contact.
The connecting rod 71 is fixed to the shaft body 33, and the second connecting rod 71 is also fixed to the shaft body 33.

On the other hand, when the male screw 74 and the female screw 75 are screwed in the opposite directions to move the second connecting rod 72 toward the hand side with respect to the first connecting rod 71, the space between the slopes 76 and 77 is reduced. By releasing the pushing force, the shaft tightening chuck 7
The contact of 0 with the peripheral surface of the shaft body 33 is loosened, and the first connecting rod 71 and the second connecting rod 72 are connected to the shaft body 33.
It is possible to freely move in the axial direction of.

Stopper flanges 71a, 72a near the inner diameter of the rod housing hole 37 are formed at the front ends of the first connecting rod 71 and the second connecting rod 72, respectively. O
The ring 44 is installed between the collar portions 71a and 72a.

Then, the positional relationship between the first connecting rod 71 and the second connecting rod 72 with respect to the shaft main body 33 is determined by the operation at a predetermined position on the proximal side of the shaft main body 33. It is possible to adjust the direction. Also, the distance between the stopper flanges 71a and 72a can be adjusted. As a result, the respective end positions of the first stopper portion 11 and the second stopper portion 12 can be set arbitrarily and individually.

FIG. 8 shows the construction of the essential parts of the grasping forceps 1 according to the eighth embodiment of the present invention. The configuration of the grasping forceps 1 of this embodiment is almost the same as that of the first embodiment described above, but the following points are different. That is, the connecting rod 41
A hole 81d on the tip side is provided inside, and the proximal end of the shaft body 33 is inserted and fitted therein, and is fixed by a fixing means such as brazing or adhesion.

Further, the through hole 38 of the fixed operating handle 28
Instead of this, a hole 80 is provided from the proximal side, and a female screw 81 is formed in this hole 80. A stopper screw member 82 is screwed into the hole 80. The stopper screw member 82 has a hole 83 having a diameter larger than that of the small diameter portion 41b in order to allow the small diameter portion 41b of the connecting rod 41 to pass therethrough. At the tip of the stopper screw member 82, a cylindrical stopper portion 84 having an outer diameter that can be accommodated in the rod storage hole 37 of the fixed operation handle 28 is provided.

Therefore, when the connecting rod 41 advances toward the rear end, the step which is the boundary between the large diameter portion 41a and the small diameter portion 41b contacts the tip of the stopper portion 84 of the stopper screw member 82. Contact. This constitutes the second stopper portion 12. Then, the stopper screw member 8
By screwing 2 with respect to the internal thread 81 of the fixed operation handle 28, the stopper screw member 82 can be moved in the axial direction. By doing so, it becomes possible to continuously and arbitrarily adjust the end position by the second stopper portion 12.

FIG. 9 shows the construction of the essential parts of the grasping forceps 1 according to the ninth embodiment of the present invention. The configuration of the grasping forceps 1 of this embodiment is almost the same as that of the first embodiment described above, but the following points are different. That is, a hole 91 having an opening on the tip side is coaxially provided on the tip side portion of the connecting rod 41, and the proximal end of the shaft body 33 is inserted and fitted therein, and fixing such as brazing or adhesion is performed. It is fixed by means.

Further, a female screw 92 is provided in the insertion guide hole 36 of the fixed operation handle 28 so that the butting pipe 39
A male screw 93 is provided on the outer periphery of the butting pipe 39 and is screwed into the insertion portion guide hole 36. Butt pipe 39
The rear end portion is extended toward the hand side and forms a stopper portion 39b having an outer diameter which is housed in the rod housing hole 37 of the fixed operation handle 28.

With the connecting rod 41 advanced toward the tip end, the end face of the large diameter portion 41a comes into contact with the stopper portion 39b of the abutting pipe 39, whereby the
It constitutes the first stopper portion 11.

Although the basic function of this is the same as that of the above-mentioned embodiment, by screwing the butting pipe 39 with respect to the female screw 92 of the fixed operation handle 28, the butting pipe 39 and The sheath 24, the insulating tube 25, and the operating shaft 10 move back and forth as a unit. By doing so, it becomes possible to move and adjust the terminal position of the second stopper portion 12 back and forth. At this time, the position of the first stopper portion 11 does not change.

FIG. 10 shows the construction of the essential parts of the grasping forceps 1 according to the tenth embodiment of the present invention. The structure of this embodiment is almost the same as that of the above-mentioned embodiment, but the connecting structure of the shaft body 33 and the connecting rod 41 constituting the operating shaft 10 is the same as that of the above-mentioned eighth and ninth embodiments. ing.

A female screw 95 is provided on the inner surface of the butting pipe 39, while a male screw 96 is provided on the outer periphery of the sheath 24 near the proximal end. The external thread 96 of the sheath 24 is screwed into the internal thread 95 of the butting pipe 39 to connect them.

The basic function of this is the same as that of the above-mentioned embodiment, but the sheath 24, the insulating tube 25, and the operating shaft 10 are made to move by screwing the sheath 24 with respect to the butting pipe 39. It is possible to move the abutting pipe 39 and the fixed operation handle 28 in the front-rear direction. By doing so, the end positions of the first stopper portion 11 and the second stopper portion 12 can be adjusted back and forth simultaneously. The adjusting means for the first stopper portion 11 and the second stopper portion 12 described above may be used in combination as appropriate.

[0074]

As described above, according to the present invention, the connecting rod is screwed and connected to the operating shaft for operating the forceps part, and the connecting rod is inserted through the fixed operating handle which constitutes the operating part together with the movable operating handle. Since the fixed operation handle and the connecting rod are provided with the first stopper portion and the second stopper portion that regulate the forward end and the backward end of the connecting rod, the stopper portions do not become an obstacle in the gripping operation. The corners have an effective stopper action in both directions of opening and closing the movable operation handle, and further, the stopper end position can be adjusted.

[Brief description of drawings]

FIG. 1A is a vertical cross-sectional view of a main part of a grasping forceps according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view of a portion along line AA in FIG.

FIG. 2A is a vertical cross-sectional view of the entire grasping forceps. (B)
Is a vertical cross-sectional view taken along the line BB of (A).

FIG. 3A is a side view of the entire grasping forceps according to the second embodiment of the present invention. (B) is a plan view of the insertion portion of the grasping forceps and the forceps portion.

FIG. 4A is a plan view of the insertion portion and the forceps portion of the grasping forceps according to the third embodiment of the present invention. FIG. 7B is a plan view of the insertion portion and the forceps portion of the grasping forceps according to the fourth embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a main part of a grasping forceps according to a fifth embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of a main part of a grasping forceps according to a sixth embodiment of the present invention.

FIG. 7A is a vertical cross-sectional view of an essential part of a grasping forceps according to a seventh embodiment of the present invention, and FIG. 7B is a cross-sectional view of a portion along line CC of FIG.

FIG. 8 is a vertical cross-sectional view of the essential parts of a grasping forceps according to an eighth embodiment of the present invention.

FIG. 9 is a vertical cross-sectional view of a main part of a grasping forceps according to a ninth embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view of a main part of a grasping forceps according to a tenth embodiment of the present invention.

[Explanation of symbols]

3 ... forceps part, 10 ... operation shaft, 11 ... first stopper part,
12 ... 2nd stopper part 24 ... Sheath, 28 ... Fixed operation handle, 30 ... Movable operation handle, 41 ... Connecting rod.

Claims (1)

[Claims] 1. A sheath having a distal end provided with an openable and closable distal end grip portion, a fixed operation handle provided at the proximal end of the sheath, and a movable member rotatably connected to the fixed operation handle. One end of the operating handle is connected to the rotary action end of the movable operating handle, the other end is inserted into the fixed operating handle and the sheath so as to be able to move forward and backward, and the other end is connected to the distal end grip portion. A first stopper that is provided at a portion of a fixed operation handle through which the distal end gripping portion is opened and closed by a forward / backward movement associated with the turning operation of the handle and a fixed operation handle through which the operational shaft is inserted, and that regulates the forward end of the operational shaft. And a second stopper portion that is provided at a portion of the fixed operation handle through which the operation shaft is inserted and that regulates the backward end of the operation shaft, the first stopper portion and the second strike portion. At least one of the stopper portion of the path section, grasping forceps, characterized in that the modified adjusted freely configure a moving end position of the operating shaft.