JP2022080983A - forceps - Google Patents

Abstract

To provide forceps regardless of a simple configuration, allowing an operator to adjust an interval between a rotational handle and a fixed handle and to adjust an opening state according to the size and preference of the operator.SOLUTION: Forceps 1 comprise a shaft part 2, a tip operation part 3, and a handle part 4 for performing operation of the tip operation part 3. The shaft part 2 includes a shaft having a sheath to which the tip operation part 3 is fixed and a rod freely forward-movably stored in the sheath, and a shaft holding part for holding the sheath. The handle part 4 includes a shaft-part fixing base 5 to which the shaft part 2 is fixed, a fixed handle 6, and a rotational handle 7 being rotational relative to the fixed handle 6. When the rotational handle 7 is rotationally turned to be opened/closed relative to the fixed handle 6, the rod moves forward and the operation part 3 is actuated. The axial position of the sheath is moved relative to the fixed handle 6 to be able to change a maximum opening angle when the rotational handle 7 is opened relative to the fixed handle 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to forceps. More specifically, the present invention relates to forceps such as grasping forceps, peeling forceps, and scissors forceps used in endoscopic surgery such as laparoscopic surgery.

In recent years, in surgery on the stomach and large intestine, instead of operating with a large abdomen opened, multiple holes are provided in the abdominal wall, a tubular device called a trocker is inserted, and carbon dioxide gas is sent to inflate the abdominal cavity into the abdominal cavity. After creating a space in the abdominal cavity, a so-called laparoscopic surgery is often performed by inserting an electric scalpel, grasping forceps, peeling terminal, shear forceps, etc. while inserting the laparoscope into the abdominal cavity from the trocker and displaying it on the monitor. ing. Laparoscopic surgery has smaller scars and less pain than open surgery, so recovery is quicker and hospitalization is shorter, but the surgeon requires advanced technical skills.

For forceps used in endoscopic surgery such as laparoscopic surgery, the handle is the part that comes into contact with the operator's hand, so the advanced technical capabilities are fully demonstrated for a long time. In order to do so, it is desirable that the burden on the handle operation is small.

In actual surgery, the operation of grasping, detaching, and cutting tissue is performed by repeatedly opening and closing the handles of grasping forceps, detaching forceps, and scissors forceps. These handle opening / closing operations are performed from beginning to end during the operation, and may be completed in less than 1 hour or may last for a long time exceeding 6 hours. Therefore, in order for the surgeon to continue to exert a high level of technical ability in surgery, it has been desired that the forceps have a structure that does not impose a burden on the surgeon's hands.

As a conventional forceps having these configurations, there is one disclosed in Patent Document 1. This forceps has a shaft portion, a tip actuating portion at the tip of the shaft portion, and a handle portion at the end portion. The handle portion is provided with two handles, a fixed handle fixed to the case of the handle portion and a rotatable rotary handle, and the tip actuating portion is operated by operating the two handle portions by making them move relative to each other. To.

This rotating handle is provided with a rotating portion and an operating portion that are rotatably attached to the case and actuate the tip operating portion by the rotation thereof, and the operating portion is connected to and connected to the rotating portion. It is configured so that it can be released. Then, by disconnecting the operating portion from the rotating portion and reconnecting it at a predetermined angle, it is possible to adjust the opening angle of the rotating handle with respect to the fixed handle. That is, the opening of the handle portion of the forceps can be adjusted and used according to the size of the operator's hand and the posture of the operator at the time of operation. In this way, forceps that are easy for the surgeon to use and that are easy to exert advanced technical skills can be obtained.

Further, as a conventional forceps, there is one disclosed in Patent Document 2 in which the applicant was also involved in the development. This forceps has a shaft portion, a tip actuating portion, and a handle portion, and the handle portion includes a fixed handle and a rotating handle. This shaft part has a smaller diameter than a normal shaft, but the tip actuating part is equipped with a large diameter tip actuating part having a normal diameter larger than this small diameter shaft part and having sufficient gripping force. It is composed.

Since the large-diameter tip actuating part and the small-diameter shaft part are configured to be removable, insert the small-diameter shaft part from the small-diameter trocar, and once remove the tip of the small-diameter shaft part from the large-diameter trocar. The large diameter tip actuating portion can be attached to the tip of the small diameter shaft portion. Then, some of the holes in the abdomen for inserting the trocar can be narrowed to fit the small diameter trocar. The small-diameter abdominal hole eliminates the need for so-called Band-Aid (trademark) sutures, shortening the patient's hospital stay and making scars less noticeable.

That is, the burden on the patient is reduced, and the surgeon can exert a high level of technical ability by using forceps having the same gripping force as that of a normal one. In this forceps, the handle portion and the shaft portion are configured to be removable, and the shaft portion having the tip actuating portion according to the purpose of surgery is selected and configured to be replaceable.

Japanese Patent No. 3996353 Japanese Patent No. 5663088

However, in the technique described in Patent Document 1, in order to adjust the opening angle of the rotating handle, a structure for connecting the rotating portion and the operating portion and a case for covering the rotating portion are required, and the configuration is complicated. There was an inconvenience that the forceps became large. Furthermore, in order to adjust the angle, it is necessary to release the connection from the rotating part of the operation part, and there is an inconvenience that it is difficult for the operator to adjust the angle while the forceps are actually attached to the hand. rice field.

Further, the technique described in Patent Document 2 has a disadvantage that the opening angle of the rotating handle cannot be adjusted.
Here, the opening angle of the rotating handle can be adjusted by adjusting the maximum opening angle at which the rotating handle opens with respect to the fixed handle. Then, by adjusting the opening angle of the rotating handle, the distance between the rotating handle and the fixed handle is adjusted, and the optimum opening state that is easy for the operator to use is adjusted.

An object of the present invention is to allow the operator to adjust the distance between the rotating handle and the fixed handle while attaching the forceps to the hand and opening and closing the forceps, although the structure is simple, and the size of the operator's hand can be adjusted. It is an object of the present invention to provide forceps which can be adjusted to an open state according to preference.

The present invention has adopted the following configuration in order to solve the above problems.

The present invention relates to a forceps having a shaft portion, a tip actuating portion at one end of the shaft portion, and a handle portion at the other end of the shaft portion where the shaft portion is fixed and the tip actuating portion is operated.
The shaft portion includes a shaft having an elongated cylindrical sheath in which the tip actuating portion is fixed to one end and a rod housed in the sheath so as to be freely movable, and a shaft holding portion for holding the other end of the sheath. The handle portion has a shaft portion fixing base portion in which the shaft portion is fixed by the shaft holding portion, a fixed handle portion, and a rotating handle rotatably configured with respect to the fixed handle portion. The rotating handle is rotated to open and close with respect to the fixed handle, so that the rod moves forward and the tip actuating part is operated, and at least the sheath is axially oriented with respect to the fixed handle. It is characterized in that the rotating handle can change the maximum opening angle to be opened with respect to the fixed handle by moving the relative position of the.

Further, the forceps have a handle opening angle adjusting portion for adjusting the maximum opening angle, and when the handle opening angle adjusting portion is adjusted, the relative position of the sheath in the axial direction with respect to the fixed handle changes, so that the maximum opening angle is changed. It is characterized by being configured to change.

Further, the fixed handle holds the shaft fixing base so as to be movable in the axial direction, and by adjusting the handle opening angle adjusting portion, the shaft fixing base moves with respect to the fixed handle, and the shaft of the sheath with respect to the fixed handle. It is characterized in that it is configured so that the relative position in the direction changes.

Further, the shaft holding portion holds the sheath so as to be movable in the axial direction, and by adjusting the handle opening angle adjusting portion, the sheath moves with respect to the shaft holding portion, and the sheath is axially oriented with respect to the fixed handle. It is characterized in that it is configured so that its relative position changes.

Further, the handle portion main body is characterized by having a movement restricting portion that regulates the relative movement between the rotating handle and the fixed handle in only one direction.

Further, the fixed handle is located behind the rotating handle and has a substantially oval hole, and the front portion of the substantially oval hole has a front inner surface having a predetermined width. The forceps can be held by inserting the thumb ball of the hand into the hole of the approximately oval and grasping the fixed handle so that the part between the thumb and index finger and the part of the palm below it abuts on the inner surface of the front part. It is characterized by being configured.

Further, the rotating handle has a hole for at least one of the three fingers from the middle finger to the little finger, and is formed in an arch shape in which the central portion slightly bulges forward with respect to the fixed handle as a whole. It is characterized by being.

The upper part on the back side of the fixed handle is characterized by being provided with an operating means for switching whether the relative movement between the rotating handle and the fixed handle is restricted or not restricted in only one direction by the movement restricting portion. do.

According to the present invention, since it has the above-mentioned characteristics, it can be shown below.

A forceps having a shaft portion, a tip actuating portion at one end of the shaft portion, and a handle portion at the other end of the shaft portion where the shaft portion is fixed and the tip actuating portion is operated. A handle having a shaft having an elongated cylindrical sheath in which a tip actuating portion is fixed to one end and a rod housed in the sheath so as to be able to move forward, and a shaft holding portion for holding the other end of the sheath. The portion has a shaft portion fixing base in which the shaft portion is fixed by the shaft holding portion, a fixed handle, and a rotating handle rotatably configured with respect to the fixed handle, and the rotating handle is fixed. Rotated to open and close with respect to the handle, the rod is configured to move forward and actuate the tip actuating part, at least moving the sheath axially relative to the fixed handle. As a result, since the rotating handle is configured to be able to change the maximum opening angle with respect to the fixed handle, the maximum opening angle can be changed with a simple configuration.

Further, the forceps have a handle opening angle adjusting portion for adjusting the maximum opening angle, and when the handle opening angle adjusting portion is adjusted, the relative position of the sheath in the axial direction with respect to the fixed handle changes, so that the maximum opening angle is changed. Since it is configured to change, the surgeon can adjust the distance between the rotating handle and the fixed handle by changing the maximum opening angle while attaching the forceps to the hand and opening and closing. Become.

Further, the fixed handle holds the shaft fixing base so as to be movable in the axial direction, and by adjusting the handle opening angle adjusting portion, the shaft fixing base moves with respect to the fixed handle, and the shaft of the sheath with respect to the fixed handle. Since the relative position in the direction is changed, the shaft portion having the tip actuating portion according to the purpose can be fixed to the shaft portion fixed to the shaft fixing base.

Further, the shaft holding portion holds the sheath so as to be movable in the axial direction, and by adjusting the handle opening angle adjusting portion, the sheath moves with respect to the shaft holding portion, and the sheath is axially oriented with respect to the fixed handle. Since it is configured to change the relative position, it is possible to change the maximum opening angle of the handle portion by mounting this shaft portion.

Further, since the handle portion main body has a movement restricting portion that regulates the relative movement of the rotating handle and the fixed handle in only one direction, the relative movement in the direction not intended by the operator is prevented carelessly, and the relative movement is prevented. It is possible to maintain the state of the tip actuating portion.

Further, the fixed handle is located behind the rotating handle and has a substantially oval hole, and the front portion of the substantially oval hole has a front inner surface having a predetermined width. The forceps can be held by inserting the thumb ball of the hand into the hole of the approximately oval and grasping the fixed handle so that the part between the thumb and index finger and the part of the palm below it abuts on the inner surface of the front part. Since it is configured, it is possible to stably hold the forceps.

Further, the rotating handle has a hole for at least one of the three fingers from the middle finger to the little finger, and is formed in an arch shape in which the central portion slightly bulges forward with respect to the fixed handle as a whole. Therefore, the forceps can be opened and closed in a natural shape.

The upper part on the back side of the fixed handle is provided with an operating means for switching whether the relative movement between the rotating handle and the fixed handle is restricted or not restricted in only one direction by the movement restricting portion, so that the index finger can be pressed. It can be easily switched using.

It is a perspective view from the front which shows the structure of the forceps which concerns on 1st Embodiment of this invention. The configuration of the forceps according to the first embodiment of the present invention is shown, (A) is a perspective view seen from the back, and (B) is a perspective view seen from the back with the shaft portion removed. The configuration of the forceps according to the first embodiment of the present invention is shown, and FIGS. (A) to (F) are views corresponding to a six-view view of the forceps. It is a perspective exploded view seen from the front which shows the structure of the forceps which concerns on 1st Embodiment of this invention. An example of using the forceps according to the first embodiment of the present invention is shown, (A) is a left side view showing a state in which a small hand operator wears forceps, and (B) a state in the case of a large hand. .. It is a front view which shows the structure of the main part of the forceps which concerns on 1st Embodiment of this invention. The configuration of the main part of the forceps according to the first embodiment of the present invention is shown, (A) is a partial cross-sectional view showing the combination of the main parts when corresponding to a small hand, and (B) corresponds to a large hand. It is a partial cross-sectional view which shows the case of this. It is a figure for demonstrating the holding state of the forceps which concerns on 1st Embodiment of this invention, and shows the shape of a human hand, (A) is a top view, (B) is a left side view. It is a figure for demonstrating the holding state of the forceps which concerns on 1st Embodiment of this invention, (A) is the left side view of the shape of a hand, (B) is the left side of the state which the forceps are held by a hand. It is a top view. It is a figure for demonstrating the holding state of the forceps which concerns on 1st Embodiment of this invention, (A) is the left side view of the shape of a hand, (B) is the left side of the state which the forceps are held by a hand. A plan (C) is a left side view of a state in which the conventional forceps are held by hand. The configuration of the main part of the forceps according to the first embodiment of the present invention is shown, (A) is a perspective view which shows the combination of the main part when the ratchet is removed, and (B) is the ratchet. It is a perspective view seen from the back which shows the case of wearing a ratchet. The configuration of the forceps according to the first embodiment of the present invention is shown, (A) is an exploded view of a main part seen from the back, and (B) is an exploded view of the main part seen from the front. A configuration of a main part of the forceps according to the first embodiment of the present invention is shown, (A) is a partial cross-sectional view showing a combination of the main parts when the ratchet is removed, and (B) is a ratcheted portion. It is a partial cross-sectional view which shows the case. It is a left side view which shows the structure of the forceps which concerns on 2nd Embodiment of this invention. The configuration of the forceps according to the second embodiment of the present invention is shown, and a part is a perspective exploded view seen from the back and a part is a perspective exploded view seen from the front. It is sectional drawing which shows the structure of the forceps which concerns on 2nd Embodiment of this invention. It is a left side view which shows the structure of the forceps which concerns on 3rd Embodiment of this invention. It is a partial cross-sectional view which shows the structure of the forceps which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the following description, the front-back direction, the up-down direction, and the left-right direction of the forceps are shown with the operator holding the forceps in his / her hand and viewed from the operator's side, and the direction in which the tip actuating portion is located is indicated. The forward direction and the opposite direction are referred to as the backward direction or the back direction.
However, the front-back, up-down, and left-right directions shown below are shown for convenience of explanation, and the present technique is not limited to these directions.

(First Embodiment)
A first embodiment of the present invention will be described with reference to FIGS. 1 to 13.
First, the configuration of the forceps 1 will be described with reference to FIGS. 1 to 4.
FIG. 1 is a perspective view of the forceps 1 as viewed from the front. As shown in FIG. 1, the forceps 1 (forceps) are located at the long shaft portion 2 (shaft portion), the tip actuating portion 3 (tip actuating portion) at one end of the shaft portion 2, and the other end of the shaft portion 2. It has a handle portion 4 (handle portion) for operating the tip actuating portion 3. The handle portion 4 is rotatably configured with respect to the shaft portion fixing base portion 5 (shaft portion fixing base portion) to which the shaft portion 2 is fixed, the fixed handle portion 6 (fixed handle), and the fixed handle portion 6. It has a rotating handle portion 7 (rotating handle). Further, the fixed handle portion 6 is provided with a ratchet operation portion 8 (movement restricting portion) and a handle opening angle adjusting portion 9 (handle opening angle adjusting portion).

FIG. 2A is a perspective view of the forceps 1 viewed from the rear, and FIG. 2B is a perspective view of the forceps 1 in a state where the shaft portion 2 is removed from the handle portion 4 as viewed from the rear. That is, as shown in FIG. 2B, in the present embodiment, the fixed shaft portion 2 of the tip actuating portion 3 is removed from the shaft portion fixing base 5, and the tip actuating portion 3 having various functions is fixed. It is configured so that it can be replaced with the shaft portion 2.

3 (A) to 3 (F) are hexagonal views of the forceps 1 and represent the outer shape of the forceps 1 in a design diagram. That is, FIG. 3 (A) is a view corresponding to the front view of the forceps 1, FIG. 3 (B) is a rear view, FIG. 3 (C) is a left side view, and FIG. 3 (D) is a right side view, FIG. 3 ( E) is a plan view, and FIG. 3 (F) is a bottom view.

FIG. 4 is an exploded view of the forceps 1 in a state of being viewed from the front. As shown in FIG. 4, a tip actuating portion 3 provided at the tip of the shaft portion 2 is provided in front of the shaft portion 2. Here, the tip actuating portion 3 of the present embodiment has a shape having a function of gripping the tissue by opening one side.

As shown in FIG. 4, the shaft portion 2 has a long shaft 21 (shaft) and a shaft holding portion 22 (shaft holding portion). The shaft 21 has a rod 23 (rod) in the center and a hard and elongated cylindrical sheath 24 (sheath) in which the rod 23 is movably housed and the tip actuating portion 3 is fixed to the front end. By moving the rod 23 back and forth in the sheath 24, operations such as opening and closing of the tip actuating portion 3 are performed. The shaft portion 2 is fixed to the shaft portion fixing base portion 5 by the shaft holding portion 22 that holds the rear end portion of the sheath 24.

As shown in FIG. 4, the shaft portion fixing base portion 5 to which the shaft portion 2 is fixed has a connecting shaft 51 at the center, a connecting shaft guide 52 for guiding the connecting shaft portion 52, a rotary knob 53, a wave washer 54, and an adjusting base portion 55. Have. The connecting shaft 51 is configured to move forward through a through hole communicating the connecting shaft guide 52 and the adjusting base 55.

As shown in FIG. 4, the fixed handle portion 6 has a fixed handle main body 61 and a rotating handle shaft 62, and the fixed handle main body 61 is provided with a ratchet operation portion 8 and a handle opening angle adjusting portion 9. There is. In the present embodiment, the handle opening angle adjusting portion 9 is a cam having a lever for moving the shaft portion fixing base 5 in the front-rear direction, and has a handle opening angle adjusting cam 91 and handle opening angle adjusting levers 92 and 92. is doing.

As shown in FIG. 4, the rotating handle portion 7 is configured to be rotatable around the rotating handle shaft 62 with respect to the fixed handle main body 61, and has a rotating handle main body 71 and a shaft end holder 72. is doing. As will be described later, one end of the connecting shaft 51 is locked to the shaft end holder 72, and the rotating handle body 71 is rotated to move the connecting shaft 51 and the rod 23 forward, so that the tip actuating portion 3 is used. Is configured to be activated.

As shown in FIG. 4, the ratchet operation unit 8 has a ratchet operation lever portion 81 and a ratchet claw portion 82. The ratchet operating lever portion 81 is provided on the upper portion of the rotating handle main body 71 on the rear surface side, and has a ratchet operating lever 83, a ratchet operating lever holder 84 for holding and guiding the ratchet operating lever 83, and a shaft (not shown) penetrating the ratchet operating lever holder 84. Further, the ratchet claw portion 82 is provided inside the rotating handle main body 71, and has a ratchet claw 85, a ratchet claw guide 86, a ratchet claw spring 87, and a ratchet claw spring holder 88.

Next, an example of using the forceps 1 will be described with reference to FIG.
5 (A) and 5 (B) show a state in which the surgeon wears surgical gloves and holds the forceps 1, and FIG. 5 (A) shows the surgeon holding a small hand HS. In this case, FIG. 5B shows the case of a large hand HL. With this forceps 1, the operator can operate the handle opening angle adjusting lever 92 of the handle opening angle adjusting portion 9 while holding the forceps 1 in the case of a small hand HS or a large hand HL. The maximum opening angle of the rotating handle portion 7 with respect to the fixed handle portion 6 can be adjusted according to the size. Here, the adjustment of the opening angle of the rotating handle portion 7 is the adjustment of the distance between the rotating handle portion 7 and the fixed handle portion 6, and is adjusted to the optimum opening state for the operator. ..

As shown in FIGS. 5 (A) and 5 (B), the fixed handle holding hole 61a (substantially oval hole) provided in the fixed handle portion 6 is completely inserted into the base of the thumb of the operator's hand. Can hold the forceps 1. In addition, the other fingers of the hand are naturally attached to the rotating handle portion 7, and the third to fifth fingers (three fingers from the middle finger to the little finger) are inserted into the rotating handle holding hole 71a, and the rotation is performed. The moving handle portion 7 can be operated. That is, as will be described later, in order to make the forceps 1 easier to use, the shape of the forceps 1 is ergonomically examined, and the shape of the handle of the forceps 1 is developed. Therefore, the surgeon can demonstrate the advanced technique possessed by the surgeon without holding the forceps 1 in an unreasonable manner, with less fatigue and pain in the hand and no burden on the hand. That is, the forceps 1 that are gentle on the operator's hand are realized.

Furthermore, as shown in FIGS. 5 (A) and 5 (B), since the ratchet operating lever portion 81 is provided on the upper portion of the rotating handle main body 71 on the back side, the operator can perform the rotating handle holding hole 71a. You can easily operate whether to apply the ratchet by using the index finger that is not included in.
Although the forceps 1 has the above-mentioned characteristics in use, the configuration that realizes the forceps 1 will be described in detail below in order.

6 and 4 will be used to describe how the rotational movement of the rotating handle portion 7 is transmitted to the rod 23 and the like.
FIG. 6 is a partially exploded perspective view seen from the front to show how the forceps 1 operate. As shown in FIG. 6, the rear end portion of the rod 23 is once thinned, and a spherical rod end spherical portion 23a is formed at the tip thereof. On the other hand, at the front end of the connecting shaft 51, a shaft end holder portion 51a having a hole and a groove for accommodating and engaging the rod end spherical portion 23a is formed. That is, the rod 23 and the connecting shaft 51 are detachably engaged and connected.

As shown in FIG. 6, the rear end portion of the connecting shaft 51 is once thinned, and a spherical connecting shaft end spherical portion 51b is formed at the tip thereof. On the other hand, the shaft end holder 72 assembled on the rotating handle main body 71 is formed with a cylindrical bottomed hole having an open upper end and an elongated groove, and the connecting shaft end spherical portion 21a is housed and engaged. .. When the connecting shaft 51 and the rotating handle portion 7 are engaged and connected and rotated so as to open and close the rotating handle portion 7, the movement is transmitted to the rod 23 via the connecting shaft 51, and the rod 23 moves forward. It will move.

Here, as shown in FIG. 6, the adjusting base 55 is formed with a cylindrical portion 55a having cylindrical portion ribs 55b and 55b that are vertically long in the front-rear direction. On the other hand, as shown in FIG. 4, the front portion of the fixed handle main body 61 has a cylindrical portion guide hole 61c and 61c having columnar portion rib guide grooves 61c and 61c that are long in the vertical direction above and below the inner surface of the hole so as to correspond to the cylindrical portion 55a. The portion 61b is formed. When the cylindrical portion 55a is inserted into the cylindrical portion guide hole portion 61b, the adjusting base portion 55 is held by the fixed handle main body 61 so as to be movable back and forth and unable to rotate in the circumferential direction.

As shown in FIG. 6, a substantially U-shaped adjusting base cam groove 55c is formed at the rear portion of the adjusting base 55. On the other hand, the handle opening angle adjusting cam 91 has a handle opening angle adjusting camshaft 91a eccentric with respect to the center of rotation, and when the handle opening angle adjusting lever 92 is turned, the handle opening angle adjusting camshaft 91 becomes an adjustment base. It moves in the cam groove 55c and moves the adjusting base 55 in the front-rear direction.

Then, with reference to FIG. 7, and FIGS. 4 and 6, how the maximum opening angle of the rotating handle portion 7 with respect to the fixed handle portion 6 is configured to be adjustable will be described.
7 (A) and 7 (B) show the position of the handle opening angle adjusting cam shaft 91a, and the shaft portion fixing base portion 5, the shaft portion 2, and the rotating handle portion 7 with respect to the fixed handle portion 6 changed by the position. It is a partial cross-sectional view of the forceps 1 which shows the movement.

As shown in FIGS. 4, 6, 7 (A) and 7 (B), the connecting shaft guide 52 and the adjusting base 55 are integrally fixed so as to sandwich the rotary knob 53 and the wave washer 54 in between. There is. Then, the rotary knob 53 is rotatably held around the connecting shaft guide 52. Here, the wave washer 54 is inserted in order to apply a force by a spring in the axial direction to the rotary knob 53 to remove play and to give an appropriate friction force.
The rotary knob 53 is provided to rotate the shaft portion 2 when the forceps 1 grips the tissue to change the direction of the tip actuating portion 3.

As shown in FIGS. 4, 6, 7 (A), and 7 (B), the fixed handle portion 6 holds the shaft portion fixing base portion 5 so as to be movable in the axial direction, and the handle opening angle adjusting portion 9 By adjusting, the shaft portion fixing base portion 5 can be moved with respect to the fixed handle portion 6. That is, the shaft portion 2 fixed to the shaft portion fixing base portion 5 can be moved.

7 (A) and 7 (B) show how the opening angle of the rotating handle portion 7 changes depending on the position of the shaft portion 2.
Here, when the rotating handle portion 7 is opened and closed with respect to the fixed handle portion 6, the tip actuating portion 3 also opens and closes accordingly. That is, in FIG. 7A, when the rotating handle portion 7 is rotated so as to open with respect to the fixed handle portion 6, the rod 23 advances and the tip operating portion 3 fixed to the tip of the shaft portion 2 also opens. To go. Then, when the tip actuating portion 3 is fully opened, the rod 23 stops advancing, and the rotating handle portion 7 cannot rotate any more. The angle of the rotating handle 7 with respect to the fixed handle portion 6 at this time is the maximum opening angle.

Next, as shown in FIG. 7B, consider a case where the handle opening angle adjusting portion 9 is adjusted to move the position of the shaft portion 2 in the forward direction. In this case, since the tip actuating portion 3 also moves in the forward direction, the tip actuating portion 3 cannot be fully opened unless the position of the rod 23 is further advanced as compared with the case of FIG. 7A. Then, in order to fully open the tip actuating portion 3, the rotating handle portion 7 also opens further, and the maximum opening angle of the rotating handle 7 becomes larger.

On the contrary, when the handle opening angle adjusting portion 9 is adjusted and the position of the shaft portion 2 is moved backward, the tip actuating portion 3 also moves backward, and as a result, the maximum opening angle of the rotating handle 7 is reached. Will be smaller.
Here, the adjustment of the opening angle of the rotating handle is the adjustment of the distance between the rotating handle and the fixed handle, and is adjusted to the optimum opening state for the operator.

Since the forceps 1 are configured as described above, the operator can adjust the distance between the rotating handle portion 7 and the fixed handle portion 6 while attaching the forceps 1 to the hand and opening and closing the forceps 1, and the operator can adjust the distance between the forceps 1 and the fixed handle portion 6. It has become possible to adjust the open state according to the size and taste of the hand. As a result, the burden on the operator's hand has been reduced, and it has become possible for the operator to continue to demonstrate advanced technical skills in surgery.

In the present embodiment, the rotating handle portion 7 is configured to be rotated around the rotating handle shaft 62 provided on the fixed handle portion 6, but the present invention is not limited to this. For example, it is of course possible to provide a circular arc-shaped rotation guide so that the rotation handle portion 7 is rotated around the virtual axis instead of the rotation handle shaft 62. Is.

Further, the tip actuating portion 3 of the present embodiment has a shape having a function of gripping a single-sided tissue, but the present invention is not limited to this. Of course, it may have a double-sided gripping function, or may have a peeling function, a scissors function, or the like.

Further, in the present embodiment, the handle portion 4 has various functions already possessed by the operator, for example, because the fixed shaft portion 2 of the tip actuating portion 3 is interchangeably configured. The shaft portion 2 to which the tip actuating portion 3 is fixed can be effectively utilized in the forceps 1.

Here, in the present embodiment, in order to make the forceps 1 easier to use for the operator, the shape of the handle of the forceps 1 is examined from an ergonomic point of view, and a new shape is developed. This new type of forceps 1 will be described with reference to FIGS. 8 to 10.

First, consider the shape of the human hand. 8 (A) and 8 (B) show the shape of the hand when a human holds the hand lightly and naturally, and FIG. 8 (A) shows the shape of the hand as seen from above, FIG. (B) is a view seen from the left side surface.
As shown in FIG. 8A, it can be seen that when the hand is lightly grasped, the fingers and the entire palm are in the shape of a cylinder. That is, as shown in FIGS. 8 (A) and 8 (B), it is considered that the human hand has a shape suitable for gripping the cylinder B.

As shown in FIGS. 8 (A) and 8 (B), the thumb ball T (the bulge at the base of the thumb of the palm) and the second to fifth fingers (four fingers from the index finger to the little finger). Is in the shape of facing each other with the column B in between. Further, as shown by the broken line, the shapes of the second to fifth fingers are, strictly speaking, bulging slightly outward at the center and forming an arch shape.

9 (A) and 9 (B) show the shape of the hand when it is naturally grasped and the forceps 1 corresponding thereto, and FIG. 9 (A) shows the shape of this hand, FIG. 9 ( B) shows the shape of the hand holding the forceps 1. The reason why the hand shown in FIG. 9B does not wear surgical gloves is to show the shape of the hand more clearly.

As shown in FIG. 9B, the forceps 1 is configured so that the ball of the thumb completely enters the fixed handle holding hole 61a and a part of the back side of the hand abuts on the rear part of the fixed handle holding hole 61a. Has been done. As shown in FIG. 2A, the inner surface of the front portion of the fixed handle holding hole 61a is formed with a wide fixed handle holding hole front inner surface 61f (front inner surface) formed to a predetermined width. .. Then, as shown in FIG. 9B, when the hand is put in, the portion between the thumb and the index finger and the portion of the palm below the thumb and the index finger are widely configured to abut on the inner surface 61f of the front portion of the fixed handle holding hole. With these configurations, the fixed handle portion 6 is firmly held between the thumb and index finger and the palm portion underneath, so that the operator can stably hold the forceps 1 in the hand simply by lightly touching the thumb. Will be done. That is, the operator can freely move the second to fifth fingers while stably holding the forceps 1.

10 (A), 10 (B), and 10 (C) show the shapes of the second to fifth fingers, and FIG. 10 (A) shows the fingers of the hand when naturally grasped. Shape, FIG. 10 (B) shows the case of grasping the forceps 1 and FIG. 10 (C) shows the case of grasping the conventional forceps 100.

As described above and as shown in FIG. 10 (A), the shape of the second to fifth fingers when the hand is held is, strictly speaking, an arch shape in which the center bulges slightly outward as shown by the broken line. Become. As shown in FIG. 10B, in the present embodiment, the rotating handle portion 7 is also formed in an arch shape in which the central portion slightly bulges forward, and the second to fifth fingers are naturally fingered. Can be applied.

As shown in FIG. 10A, the rotating handle holding hole 71a is configured to accommodate the third to fifth fingers, and the index finger of the second finger is not inserted into the rotating handle holding hole 71a. Not in. This is so that the rotary knob 53, the ratchet operation lever 83, and the like can be freely operated by using the index finger. By the way, when the peeling forceps are used, the peeling forceps are peeled from the tissue by repeatedly opening the tip actuating portion 3. Since the rotation handle holding hole 71a enables a rotation operation such as opening the rotation handle portion 7 for opening the tip actuating portion 3, three fingers, the third finger to the fifth finger, are used here. Although it is designed to be inserted, it may be configured so that only one finger can be inserted. However, the burden on the hand is reduced when multiple fingers are inserted.

As shown in FIG. 10 (C), in the case of the conventional forceps 100, since the arrangement of the second finger to the fifth finger becomes a straight line, the second finger has a shallow finger contact, and the third finger and the third finger. It is difficult to put your finger in a natural state because the 4th finger becomes too deep and the 5th finger opens far away. In addition, in the case of long-term surgery, the forceps are opened and closed only with the thumb and ring finger, which causes hand fatigue and pain.
Here, the description of the conventional forceps 100 is for comparison with the arrangement of the fingers of the second to fifth fingers in the ergonomic rotation handle portion 7 of the present embodiment, and is for the present invention. Techniques elsewhere are not limited by this description.

As described above, in the forceps 1, the fixed handle portion 6 is stably held between the thumb and the index finger and the palm portion under the thumb, and the other fingers are naturally attached to the rotating handle portion 7. It can be operated.
Therefore, the surgeon can demonstrate the advanced technique possessed by the surgeon without holding the forceps 1 in an unreasonable manner, with less fatigue and pain in the hand and no burden on the hand. That is, the forceps 1 that are gentler to the operator's hand can be realized.

Next, since the forceps 1 of the present embodiment has a ratchet mechanism (movement restricting unit) which is a movement restricting unit that regulates the relative movement of the rotating handle portion 7 and the fixed handle portion 6 in only one direction. The configuration will be described with reference to FIGS. 11 to 13.

11 (A) and 11 (B) are partial perspective views of a part of the rotating handle portion 7 and the ratchet operating portion 8 as viewed from the rear direction, and FIG. 11 (A) shows a state in which the ratchet is removed. FIG. 11B shows a state in which the ratchet is applied. FIG. 12A shows an exploded perspective view of the entire ratchet operating unit 8 as viewed from the rear surface direction, and FIG. 12B shows an exploded perspective view of the ratchet operating lever unit 81 as viewed from the front surface direction. 13 (A) and 13 (B) are partial cross-sectional views seen from the left side surface of the ratchet mechanism portion, FIG. 13 (A) shows a state in which the ratchet is removed, and FIG. 13 (B) shows a state in which the ratchet is engaged. Is shown.

As shown in FIGS. 11A and 11B, the rotary handle main body 71 has a claw gear portion 71b that projects diagonally toward the upper part of the back surface and forms an arc shape with respect to the center of rotation. .. Further, the ratchet claw 85 having the ratchet claw portion 85a, which will be described later, located at a position facing the claw gear portion 71b is urged forward by the ratchet claw spring 87 via the ratchet claw guide 86, and is configured to be freely advancing and retreating. There is.

As shown in FIGS. 11A and 11B, the ratchet operating lever 83 is formed with a substantially cylindrical operating lever main body portion 83a and operating lever portions 83b and 83b, with a central axis (not shown) as a rotation center. , Is configured to swing from side to side. Further, ratchet cam groove portions 83d, 83e, 83e are formed in the lower part of the back surface of the ratchet operation lever 83, and the ratchet claw 85 is operated to move forward and backward as described later.

As shown in FIG. 11A, when the ratchet operating lever 83 is in the neutral state, the ratchet of the rotating handle main body 71 is released. Then, as shown in FIG. 11B, if the operation lever portion 83b is operated by an index finger or the like to rotate the ratchet claw 85 to an inclined state, the ratchet claw 85 advances and the ratchet is applied.
Then, using FIGS. 12 (A), 12 (B), 13 (A), and 13 (B), their configurations and movements will be described in detail.

First, the configuration of each part of the ratchet operation part 8 will be described with reference to FIG.
As shown in FIG. 12A, the ratchet operating lever portion 81 has a ratchet operating lever 83 and a ratchet operating lever holder 84. A large number of ratchet dowel receiving recesses 83c, 83c ... 83c are formed on the back surface of the ratchet operating lever 83. Ratchet cam groove portions 83e, 83d, 83e are formed in the lower part of the back surface, the central ratchet cam groove portion 83d is shallow, and the left and right ratchet cam groove portions 83e are formed deeply (that is, deeply recessed in the front direction). On the other hand, the ratchet operation lever holder 84 has front and rear disk portions 84a and 84a and a lower connecting portion 84b connecting them, and is formed in a substantially U shape when viewed from the side surface. A ratchet claw hole 84b, which is a square hole, is formed in the lower portion of the disk portion 84a on the back surface side.

As shown in FIG. 12A, the ratchet claw portion 82 has a ratchet claw 85, a ratchet claw guide 86, a ratchet claw spring 87, and a ratchet claw spring holder 88. The ratchet claw spring holder 88 is fixed to the fixed handle main body 61, and the ratchet claw guide 86 is slidably combined so as to sandwich the ratchet claw spring 87 in between, and urges the ratchet claw 85 in the forward direction. The ratchet claw front portion 85b at the front portion of the ratchet claw 85 penetrates the inner surface of the ratchet operation lever holder 84 from the ratchet claw hole 84c and is moved back and forth by the ratchet cam groove portions 83e, 83d, 83e.

As shown in FIG. 12B, a substantially inverted U-shaped notch for giving elasticity to the disk portion 84a on the back side and ratchet dowels 84d and 84d protruding forward at the tip thereof are left and right, respectively. It is formed. Then, the ratchet operation lever 83 is combined and fitted with the ratchet dowel receiving recesses 83c, 83c ... 83c, and the swinging ratchet operation lever 83 is predetermined when it is in a substantially horizontal state and when it is tilted. It is configured to hold the position.

Next, the movement of each part of the ratchet operation unit 8 will be described with reference to FIG.
As shown in FIG. 13A, when the ratchet operating lever 83 is in the neutral state, the ratchet claw front portion 85b is pushed backward by the shallow ratchet cam groove portion 83d, and the ratchet claw 85 retracts. Then, since the ratchet claw portion 85a is disengaged from the claw gear portion 71b, the ratchet of the rotating handle main body 71 is released.

On the other hand, as shown in FIG. 13B, when the ratchet operation lever 83 is in an inclined state, the ratchet claw front portion 85b moves forward corresponding to the deep ratchet cam groove portion 83e, and the ratchet claw 85 advances. Then, since the ratchet claw portion 85a engages with the claw gear portion 71b, the ratchet of the rotating handle main body 71 is hooked.

As described above, in the present embodiment, the ratchet operation lever 83 is provided on the upper portion on the back side of the fixed handle portion 6, and the ratchet of the rotating handle main body 71 can be hooked and removed, and the state is maintained. And said. Further, for this reason, it is possible to freely switch with one finger such as the index finger of the operator, and it is possible to obtain forceps that are easier for the operator to use and that are easy to demonstrate advanced technical skills.

In the present embodiment, the claw gear portion 71b is formed in an external tooth shape facing the outside of the arc-shaped portion of the rotating handle main body 71, but has an internal tooth shape facing the inside of the arc-shaped portion. It may be configured to form. In this case, since the ratchet claw portion 82 is configured inside the claw gear portion 71b, there is a possibility that the ratchet claw portion 82 or the like can be formed more compactly.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIGS. 14 to 16.
In this second embodiment, the technical idea of the present invention can be applied to forceps having the same structure as the forceps conventionally used in endoscopic surgery such as laparoscopic surgery. It shows that the convenience of 1 is improved.
14 shows a side view of the forceps 1 as viewed from the left side, FIG. 15 shows an exploded perspective view, and FIG. 16 shows a cross-sectional view.

As shown in FIG. 14, in the second embodiment as in the first embodiment, the forceps 1 are the long shaft portion 2, the tip actuating portion 3 at one end of the shaft portion 2, and the shaft portion 2. It has a handle portion 4 at the other end that operates the tip actuating portion 3, and has the same function. Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different parts will be described.

As shown in FIG. 14, in the forceps 1 of the present embodiment, the rotating handle portion 7 is provided at the rear portion of the fixed handle portion 6, and the holes of the respective handles, the rotating handle holding hole 71a, and the fixed handle holding hole 61a are provided. Is configured so that one finger can be inserted at a time. Further, the shaft 21 of the shaft portion 2 has a small diameter, and the rod 23 does not use the connecting shaft 51 as in the first embodiment, and as shown in FIG. 16, the direct rotating handle portion 7 is used. It is configured to engage with. Further, the handle opening angle adjusting portion 9 uses a cam with a lever in the first embodiment, but in the present embodiment, as shown in FIG. 15, it is composed of a ring-shaped screw.

As shown in FIGS. 15 and 16, the adjusting base 55 is formed from the front with a large-diameter front cylindrical portion 55d, a medium-diameter cylindrical threaded portion 55e, and a small-diameter rear cylindrical portion 55f. Further, long cylindrical guide grooves 55g and 55g are provided on the left and right side surfaces of the front cylindrical portion 55d. On the other hand, the fixed handle main body 61 has a cylindrical guide hole portion 61b corresponding to the adjusting base portion 55. Cylindrical guide ribs 61d and 61d corresponding to the cylindrical guide grooves 55g and 55g are formed on the left and right sides of the inner wall of the cylindrical guide hole 61b. Further, the upper surface of the fixed handle main body 61 has a recess, and a handle opening angle adjusting portion storage hole 61e in which the handle opening angle adjusting portion 9 is rotatably stored is formed.

As shown in FIG. 15, the forceps 1 is configured so that the tip actuating portion 3, the shaft portion 2, and the shaft portion fixing base portion 5 are integrated and can be removed from the fixing handle portion 6. Then, first, the handle opening angle adjusting portion 9 is stored in the handle opening angle adjusting portion storage hole 61e, the adjusting base 55 is inserted into the cylindrical guide hole portion 61b, and the handle opening angle adjusting portion is rotated and assembled. Can be integrally formed. As shown in FIGS. 15 and 16, the upper end of the shaft end holder 72 of the rotating handle portion 7 is opened, and when the rotating handle main body 71 is rotated upward, the shaft of the shaft end holder 72 and the rod 23 is rotated. It is structured so that the hearts are united. Then, in this state, if the rod end spherical portion 23a is inserted from the opening of the shaft end holder 72 and the rotating handle body 71 is rotated downward, the rotating handle body 71 and the rod 23 are engaged with each other. Can be completed.

As shown in FIG. 16, the front cylindrical portion 55d and the rear cylindrical portion 55f of the adjusting base portion 55 are held in the cylindrical portion guide hole portion 61b so as to be able to move forward. By rotating the handle opening angle adjusting portion 9 screwed to the cylindrical screw portion 55e, the shaft portion fixing base portion 5 and the entire shaft portion 2 can be moved back and forth. Then, as in the first embodiment, the opening angle of the rotating handle portion 7 can be changed by moving the position of the shaft portion 2 in the axial direction with respect to the fixed handle portion 6. That is, the operator can adjust the distance between the rotating handle portion 7 and the fixed handle portion 6 while attaching the forceps 1 to the hand and opening and closing the forceps 1, and the open state according to the size and preference of the operator's hand. Can be adjusted to.

Since the forceps 1 are configured as described above, the operator can adjust the distance between the rotating handle portion 7 and the fixed handle portion 6 while attaching the forceps 1 to the hand and opening and closing the forceps 1, and the operator can adjust the distance between the forceps 1 and the fixed handle portion 6. It has become possible to adjust the open state according to the size and taste of the hand. As a result, the burden on the operator's hand has been reduced, and it has become possible for the operator to continue to demonstrate advanced technical skills in surgery.

In the present embodiment, the forceps 1 does not have a ratchet mechanism (movement restricting unit) which is a movement restricting unit that regulates the relative movement of the rotating handle portion 7 and the fixed handle portion 6 in only one direction. Of course, a conventional ratchet mechanism corresponding to the forceps used from the above may be attached.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. 17 and 18.
This third embodiment shows that the technical idea of the present invention can be applied to the type of forceps conventionally used as in the second embodiment.
FIG. 17 shows a side view of the forceps 1 as viewed from the left side, and FIG. 18 shows a partial cross-sectional view.

As shown in FIG. 17, in the third embodiment as in the first embodiment, the forceps 1 are the long shaft portion 2, the tip actuating portion 3 at one end of the shaft portion 2, and the shaft portion 2. It has a handle portion 4 at the other end that operates the tip actuating portion 3, and has the same function. Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different parts will be described.

As shown in FIG. 17, in the forceps 1 of the present embodiment, as in the second embodiment, the rotating handle portion 7 is provided at the rear portion of the fixed handle portion 6, and the holes of the respective handles and the rotating handle holding are provided. The hole 71a and the fixed handle holding hole 61a are configured so that one finger can be inserted into the hole 71a. Further, the shaft 21 of the shaft portion 2 has a small diameter, and the rod 23 is configured to be connected to the rotating handle portion 7 via the connecting shaft 51 as in the first embodiment. .. The handle opening angle adjusting portion 9 is composed of a ring-shaped screw similar to that of the second embodiment, but unlike the second embodiment, the handle opening angle adjusting portion 9 is in front of the shaft holding portion 22. It is placed in the department.

By the way, in the first embodiment and the second embodiment, the shaft portion fixing base portion 5 is held by the fixed handle portion 6 so as to be movable in the axial direction, and when the handle opening angle adjusting portion 9 is adjusted, the fixed handle portion is formed. By moving with respect to 6, the maximum opening angle of the rotating handle 7 was adjusted. However, in the third embodiment, the shaft portion fixing base portion 5 is fixed to the fixing handle portion 6 and is not moved in the same structure as the conventional forceps. That is, the maximum opening angle of the rotating handle 7 can be adjusted only by the configuration of the shaft portion 2. Hereinafter, how it is configured will be described with reference to FIG.

As shown in FIG. 18, the shaft portion 2 is configured to be detachable from the shaft portion fixing base portion 5 as in the first embodiment. That is, by engaging the rod end spherical portion 23a of the shaft portion 2 with the shaft end holder portion 51a and screwing the shaft holding portion 22 into the rotary knob 53 of the shaft portion fixing base portion 5, the shaft portion 2 becomes the handle portion 4. Is fixed to.

As shown in FIG. 18, the shaft portion 2 has a shaft base 25 and a shaft base spring 26 in addition to a shaft 21 having a rod 23 and a sheath 24 and a shaft holding portion 22, and the shaft base 25 is provided. Is fixed integrally with the sheath 24. Further, the handle opening angle adjusting portion 9 is configured as a part of the shaft portion 2. The shaft base 25 is formed with a shaft base screw portion 25a having a small diameter from the front portion, a central shaft base portion 25b having a medium diameter, and a rear shaft base portion 25c having a large diameter. The central shaft base portion 25b and the rear shaft base portion 25c are respectively held on the inner surface of the shaft holding portion 22 so as to be able to move forward, and the shaft base 25 is urged rearward by the shaft base spring 26.

As shown in FIG. 18, if the handle opening angle adjusting portion 9 is screwed into the shaft base screw portion 25a, the shaft base 25 resists the urging force of the shaft base spring 26 with respect to the shaft holding portion 22. It is held in place. Then, if the handle opening angle adjusting portion 9 is rotated to move the shaft base 25 back and forth, the sheath 24 fixed to the shaft base 25 also moves back and forth integrally. That is, since the tip actuating portion 3 fixed to the tip of the sheath 24 is moved back and forth, the maximum opening angle of the rotating handle portion 7 can be changed as in the first embodiment.

Here, in the first embodiment and the second embodiment, the entire shaft portion 2 to which the sheath 24 is fixed is moved back and forth, but in the present embodiment, the shaft portion 2 is not the entire shaft portion 2. The sheath 24 is configured to move with respect to the shaft holding portion 22 of the above. That is, in any of the embodiments, the maximum opening angle at which the rotating handle portion 7 opens with respect to the fixed handle portion 6 is changed by moving at least the sheath 24 in the axially relative position with respect to the fixed handle portion 6. It can be said that it is configured to be able to.

As described above, also in the third embodiment, the operator can adjust the distance between the rotating handle portion 7 and the fixed handle portion 6 while attaching the forceps 1 to the hand and opening and closing the operation. It can be adjusted to the open state according to the size and taste of the person's hand.

As described above, in the third embodiment, the shaft portion 2 is made into that of the present embodiment by using the forceps 1 having the same structure as the forceps used conventionally, and the rotating handle portion. It became possible to change the opening angle of 7. This makes it possible to change the handle opening angle within the movable range of the handle even for forceps that have been used for a long time, which improves convenience.
Further, if the forceps can use the conventional replaceable shaft portion, the opening angle of the rotating handle portion 7 can be changed even if the forceps do not have the same structure as the conventional forceps.

The outer peripheral surface of the rear shaft base portion 25c and the inner peripheral surface of the shaft holding portion 22 are provided with long grooves and ribs in the front-rear direction (not shown) so that the rear shaft base portion 25c does not rotate on the inner surface of the shaft holding portion 22. Of course, it may be configured as follows. Further, the directions of the screws of the shaft holding portion 22 and the shaft base 25 may be reversed to prevent loosening.

Further, in the present embodiment, the forceps 1 does not have a ratchet mechanism (movement restricting unit) which is a movement restricting unit that regulates the relative movement of the rotating handle portion 7 and the fixed handle portion 6 in only one direction. Of course, a conventional ratchet mechanism corresponding to the conventional forceps may be attached.

The forceps of the present invention are not limited to the embodiments shown above and shown in the drawings, and various modifications can be carried out within a range not deviating from the gist thereof.
For example, in the above-described embodiment, a cam with a lever or a ring-shaped screw is used for the handle opening angle adjusting portion, but the present invention is not limited to this, and a knob, dial, handle, or the like may be used. Of course.

Further, for example, in the above-described embodiment, the forceps having a hard shaft portion are described, but the forceps are not limited to this, and are used, for example, in a pharyngeal forceps used in an operation from a natural opening such as an oral cavity or anus. Of course, it may be applied to forceps having a shaft portion that can be bent.

H Hand T Thumb ball B Round bar 1 Forceps 2 Shaft part 21 Shaft 22 Shaft holding part 23 Rod 24 Sheath 4 Handle part 5 Shaft part fixing base 6 Fixed handle part 7 Rotating handle part 8 Ratchet operation part 9 Handle opening angle adjustment Part 100 Conventional forceps

Claims (8)

A forceps having a shaft portion, a tip actuating portion at one end of the shaft portion, and a handle portion at the other end of the shaft portion where the shaft portion is fixed and the tip actuating portion is operated.
The shaft portion includes a shaft having an elongated cylindrical sheath in which the tip actuating portion is fixed to one end portion, a rod housed in the sheath so as to be able to move forward, and a shaft holding the other end portion of the sheath. Has a holding part and
The handle portion has a shaft portion fixing base portion to which the shaft portion is fixed by the shaft holding portion, a fixed handle, and a rotating handle rotatably configured with respect to the fixed handle.
By rotating the rotating handle so as to open and close with respect to the fixed handle, the rod moves forward and the operating portion is operated.
At least the sheath is configured so that the maximum opening angle at which the rotating handle opens with respect to the fixed handle can be changed by moving the sheath in an axially relative position with respect to the fixed handle. Characterized forceps. The forceps have a handle opening angle adjusting portion for adjusting the maximum opening angle.
The forceps according to claim 1, wherein when the handle opening angle adjusting portion is adjusted, the maximum opening angle is changed by changing the axially relative position of the sheath with respect to the fixed handle. .. The fixed handle holds the shaft fixing base so as to be movable in the axial direction.
By adjusting the handle opening angle adjusting portion, the shaft fixing base is moved with respect to the fixed handle, and the relative position of the sheath with respect to the fixed handle in the axial direction is changed. 2. The forceps according to claim 2. The shaft holding portion holds the sheath so as to be movable in the axial direction.
By adjusting the handle opening angle adjusting portion, the sheath moves with respect to the shaft holding portion, and the relative position of the sheath with respect to the fixed handle in the axial direction is changed. The forceps according to claim 2. The forceps according to claim 1 to 4, wherein the handle portion main body has a movement restricting portion that restricts the relative movement of the rotating handle and the fixed handle in only one direction. The fixed handle is located behind the rotating handle and has a substantially oval hole.
The front part of the hole of the substantially oval has a front inner surface of a predetermined width, and the thumb ball of the hand is inserted into the hole of the substantially oval, and the part between the thumb and the index finger and the part of the palm below it. The forceps according to claim 1 to 5, wherein the forceps are configured to be able to hold the forceps by gripping the fixed handle so as to abut the inner surface of the front portion. The rotating handle has a hole for at least one of the three fingers from the middle finger to the little finger, and is formed in an arch shape such that the central portion slightly bulges forward with respect to the fixed handle as a whole. The forceps according to claim 6, wherein the forceps are provided. The upper part of the back side of the fixed handle is provided with an operating means for switching whether the relative movement between the rotating handle and the fixed handle is restricted or not restricted in only one direction by the movement restricting unit. The forceps according to claim 6 or 7.

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