JPH0838492A - Surgical forceps - Google Patents

Abstract

PURPOSE:To provide a surgical forceps whose durability is improved by making power amount added to a head part absorbed and relaxed by means of rubber elastic power when a power amount larger than its set up amount is added to a handle part. CONSTITUTION:An elliptic hole 9 is formed on the protruding part 8 of the first handle 2a, and a rubber 10 to which a protecting board 10a is fixedly stuck is fixed to the handle 2a. A rotary axis 7 is inserted into the projecting part 6 of the second handle 2b. This rotary axis 7 is held sliding-movably in the elliptic hole 9. The protecting board 10a presses semicircular shaped outer circumference of the projecting part 6 by means of elasticity of the rubber 10, and positions the rotary axis 7 at the edge face in the elliptic hole 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grasping and incising organs and the like in the abdominal cavity at the distal end in endoscopy and endoscopic surgery.
The present invention relates to surgical forceps for peeling.

[0002]

2. Description of the Related Art Conventional surgical forceps erroneously apply an excessive force to a handle portion when gripping an organ or performing other treatments, and excessive force is applied to the organ to There is a risk of scratching or damaging the tip of the surgical forceps or the handle.

Therefore, for the purpose of preventing damage to organs and damage to the distal end portion and handle portion of surgical forceps,
In Japanese Patent Laid-Open No. 63-272339, the tip portion is made of synthetic resin, or a thin rubber-like elastic body is attached to the inside of the sandwiching portion of the metal tip portion or by surrounding the sandwiching portion, A forceps for surgery has been proposed in which the force, which is wholly or partially deformed, is not transmitted to a distal end portion in excess of a preset force amount.

In US Pat. No. 3,608,554,
By configuring the forceps body with a metal having a spring property,
A forceps for surgery has been proposed in which the entire body is deformed so that a force exceeding a preset value is not transmitted to the distal end portion.

Further, US Pat. No. 5,286,255 and US
Japanese Patent No. P5009661 proposes a surgical forceps in which a force applied to the handle portion is absorbed and relaxed by a metallic coil spring so that a force exceeding a preset value is not transmitted to the distal end portion.

[0006]

However, as disclosed in Japanese Patent Laid-Open No. 63-272339, the forceps are made of synthetic resin, or the thin rubber elastic body is attached to the metal portion, so that the durability is improved. However, there is a problem in that it is not easy to process when the forceps are entirely made of metal.

Further, in US Pat. No. 3,608,554,
Since the tip gripping portion for relieving the force is made of a metal having a complicated shape, there is a problem that the processing is not easy as described above.

Further, US Pat. No. 5,286,255 and US
In P5009661 publication, since a metallic coil spring is used, a large storage space and operating space for the spring are required, so there is a problem in that the forceps as a whole become large and difficult to operate, or heavy. Furthermore, since the spring itself has gaps and spaces, it took a very long time to clean and sterilize it. Further, when changing the spring constant in order to change the set force value, it is necessary to redesign a spring having a new size, shape, and constant, which causes a problem of high manufacturing cost.

The present invention has been made in view of the above problems. Even when a force larger than the set force is erroneously applied to the handle portion, the force applied to the tip portion can be easily absorbed and relaxed, and the organ The purpose of the present invention is to provide an inexpensive surgical forceps by protecting the tissue and tissues, improving the durability of the device, and being lightweight and easy to operate, easy to wash and sterilize, and improving the workability. To do.

[0010]

According to the present invention, there is provided a handle portion composed of a first handle and a second handle which are rotatably connected to each other, and a tip opening / closing portion which is opened / closed by an opening / closing operation of the handle portion. An operating force transmitting means for transmitting the operating force of the handle portion to the tip opening / closing portion, and an operating force for relieving an operating force of a set force amount or more from being transmitted to the tip portion when a force amount is applied to the handle portion. In the surgical forceps having the easing means, the operating force easing means is made of rubber so that the rubber is elastic even when an excessive amount of force is applied without requiring a space such as a coil spring. It deforms and absorbs and relaxes forces.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a partial cross-sectional view showing the structure of surgical forceps and an external view showing a state in which a distal end opening / closing part is closed, and FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a side view showing a partial cross section of the handle portion showing a state in which the tip opening / closing portion is opened.

The surgical forceps 1 shown in FIG. 1 has a handle portion 2 composed of a first handle 2a and a second handle 2b which are rotatably connected, and an opening / closing operation of the second handle 2b. A tip opening / closing part 3 which is opened and closed by means of an operation shaft, an operation shaft 4 which transmits the operation force of the second handle 2b to the tip opening / closing part 3, and the tip opening / closing part 3 and the first handle 2a are connected to each other, In addition, it is configured by a tubular insertion portion 5 in which the operation shaft 4 is incorporated so as to be able to move straight in the axial direction. In addition,
When the handle portion 2 is rotated in the opening direction, the tip opening / closing portion 3 is opened, and when the handle portion 2 is rotated in the closing direction, the tip opening / closing portion 3 is opened.
Is set to close.

The handle portion 2 comprises a first handle 2a fixed to the proximal end of the insertion portion 5 and a movable second handle 2b. On the upper end side of the second handle 2b, a semi-circular protrusion 6 and a hole for inserting a rotation shaft 7 which is a rotation center of the handle 2 are provided at substantially central positions of the semi-circular protrusion 6. is there. On the upper end side of the first handle 2a,
Protrusions 8 having storage grooves into which the protrusions 6 are fitted are provided on both sides with the protrusions 6 in between. On both sides of the storage groove of the projection portion 8, elliptical holes 9 through which the rotary shaft 7 can slide are provided, respectively.

Further, in the vicinity of the projecting portion 8 of the first handle 2a, a rubber 10 having an appropriate elasticity and a protective plate 10a for protecting the rubber 10 fixed to the rubber 10 are provided with an operating force. A spring portion 11 as a relaxation means is provided, and is fixed to the first handle 2a by a convex portion 12 formed on the rubber 10. (Fig. 2)

Here, the material of the protective plate 10a includes metal and synthetic resin. Examples of metals include stainless steel and aluminum. The rubber 10 may be natural rubber or synthetic rubber. As the synthetic rubber, for example, silicone rubber, fluororubber, butyl rubber, ethylene propylene rubber, isoprene rubber, butadiene rubber or the like can be used.

When the handle portion 2 is operated in the closing direction,
In a normal use state in which a force equal to or greater than a set force, which is a force when the rubber 10 starts to be deformed from the assembled state, is used, the spring portion 11 causes the rotating shaft 7 inserted into the protrusion 6 to move the rotation shaft 7 through the protrusion 6 The rubber 10 is set in advance to be pressed by being previously compressed to the end of the elliptical hole 9 on the side away from the spring portion 11 as a normal use position through the outer peripheral surface of the rubber.

Next, the peripheral portion of the rotary shaft 7 will be described with reference to FIG. The protrusion 6 of the second handle 2b is formed in a thin plate shape, and on both sides of the protrusion 6, there are provided sliding portions 13 having cylindrical protrusions around the holes through which the rotary shaft 7 is inserted. , Is fitted in the storage groove of the projection 8 of the first handle 2a. The rotating shaft 7 has a columnar one end having a large diameter and a female screw provided at the other end, and is screwed through the oval holes 9 and the sliding portion 13 on both sides of the protrusion 8. Thus, the first handle 2a and the second handle 2b are rotatably connected about the rotation shaft 7.

Further, as shown in FIG. 1, the handle portion 2
Is provided with a ratchet mechanism which is an engaging means for limiting the movement of the second handle 2b in the opening direction.

This ratchet mechanism comprises a ratchet lever 14 and a stopper 15. The ratchet lever 14 is rotatably supported by a shaft 16 in an opening provided near the middle of the second handle 2b, and its tip extends through the opening of the first handle 2a and extends in an arc shape. And a plurality of ratchet teeth 17 in its middle part.
Has been placed. The ratchet teeth 17 are engaged with the stopper 15 provided on the first handle 2a, and the tip opening / closing portion 3
Is closed, the movement of the second handle 2b in the opening direction is restricted. As shown in FIG. 3, the second handle 2b
The ratchet teeth 17 do not engage with the stopper 15 in the wide open state (the tip opening / closing portion 3 is open), and when the tip opening / closing portion 3 is closed as shown in FIG. It is set to engage.

A cam-like protrusion 18 is provided in the vicinity of the rotary shaft 16 of the ratchet lever 14, and the other end of a leaf spring 19 fixed at one end to the second handle 2b has the protrusion. 18, stopper 15 and ratchet tooth 1
It is set so as to push in the engaging direction of 7.

Further, the stopper 15 of the first handle 2a
A finger hook 20 projects in the vicinity of the so as to cover the ratchet teeth 17 formed on the ratchet lever 14. The finger rest 20 is provided for the purpose of preventing the following problems. That is, as disclosed in DE4113075 and German Patent No. 9109113, since the conventional forceps do not have this finger hook, when the handle portion 2 is held by the finger and the opening / closing operation is performed, the finger is erroneously ratcheted. There is a problem that the ratchet is inadvertently released by touching the tip of the lever 14 or the ratchet teeth 17 are touched and the finger is injured.

In the present embodiment constructed as described above, when the handle portion 2 is operated with an appropriate operating force, the rotating shaft 7
Is pressed in one direction by the elastic force of the rubber 10, so the normal operating position (the side of the elliptical hole 9 far from the rubber 10)
However, when an excessive amount of force equal to or greater than the set amount of force is applied, the rotation shaft 7 moves to the other end along the elliptical hole 9 against the elasticity of the rubber 10. At this time, the protrusion 6
Presses the protective plate 10a through its outer periphery,
0a evenly distributes this pressing force and transmits it to the rubber 10, and the rubber 10 elastically deforms to absorb an excessive force equal to or greater than the preset force amount. The degree of elastic deformation of the rubber 10 is determined by the hardness of the rubber. When the hardness is high, the rubber 10 is difficult to deform, and when the hardness is low, the rubber 10 is easily deformed.

When the amount of force applied to the handle portion 2 is weakened, the elastically deformed rubber 10 returns to its original state, and the rotary shaft 7 returns to its normal operating position.

Next, the operation of the ratchet part will be described with reference to FIG.
This will be described with reference to FIG. As shown in FIG. 3, when the tip opening / closing portion 3 (not shown) is opened, the second handle 2b is also opened, and the ratchet teeth 17 do not engage with the stopper 15, so that the second handle 2b can be freely opened and closed. At this time, the tip of the ratchet lever 14 is pressed against the stopper 15 by the urging force of the leaf spring 19. When the second handle 2b is closed from this state, the ratchet teeth 17 come into engagement with the stopper 15 as shown in FIG. 1, and this ratchet mechanism allows the second handle 2b to move in the closing direction. , It cannot be moved in the opening direction. To release the engagement of the ratchet, the tip of the ratchet lever 14 may be pushed down with a finger downward in FIG. 1 against the force of the leaf spring 19. After releasing the engagement of the ratchet, a stable operation of the handle portion 2 can be performed by placing a finger on the finger rest 20.

As shown in FIG. 3, when the second handle 2b is wide open, the ratchet teeth 17 do not engage with the stopper 15 and can be freely opened and closed.
Therefore, the engagement as the ratchet operates only when it is desired to actually operate the ratchet mechanism, such as when the tip opening / closing portion 3 is closed to a certain extent.

In the present embodiment, even if the handle portion 2 is erroneously applied with an excessive amount of force greater than the set value, the excessive amount of force is absorbed and alleviated by the movement of the rotary shaft 7, and the handle portion 2 and the tip end thereof are absorbed. Since it is possible to prevent an excessive force from being applied to the opening / closing part 3, the durability of the forceps can be improved and the tip opening / closing part 3 can be improved.
It is possible to prevent inadvertent damage to the organ grasped by. Further, since the handle portion 2 does not have an excessive force applied,
The degree of freedom in selecting a material such as using a synthetic resin material for a part or the whole of the forceps is increased.

In addition, in this embodiment, since the rubber 10 is pre-compressed, the rotary shaft 7 does not move until a force more than the set value is applied, so that the rotation center of the handle portion 2 does not move and operability is improved. Good.

Further, in this embodiment, since it is made of rubber, it is lighter in weight than a metal spring and does not require a gap or space for operation, so that cleaning and sterilization are easy and the size can be reduced.

Further, in this embodiment, the convex portion 12 of the rubber 10 is used.
Since it is fitted and fixed to the first handle 2a, it can be replaced, and the elasticity, that is, the set force value can be changed easily and inexpensively without changing the volume, only by changing the type and hardness of rubber. be able to.

Further, in this embodiment, the first handle 2a
Since the fingerrest 20 is provided on the ratchet, the finger does not touch the ratchet lever 14 carelessly, the ratchet teeth 17 can hurt the finger, and the ratchet can be prevented from malfunctioning, and the handle portion 2 can be stably opened and closed. .

Further, in the present embodiment, since the arrangement position of the ratchet teeth 17 is set to the minimum necessary number of teeth near the position corresponding to the closed position of the tip opening / closing portion 3, the tip opening / closing portion 3 is in a substantially closed state, that is, the first opening / closing portion 3. The stopper 15 and the ratchet teeth 17 engage with each other for the first time when the handle 2b of No. 2 is in a substantially closed state, so that the engagement as a ratchet starts only when an organ or the like is gripped. The operability of the handle portion 2 is good. Moreover, since the number of ratchet teeth 17 is small, it is difficult for a finger to hit the ratchet teeth 17,
You can prevent injuries.

Further, in this embodiment, since the stopper 15 and the finger hook 20 are integrally provided on the first handle 2a, the number of parts is small and the structure can be constructed at low cost.

Further, since the protection plate 10a is used, the rubber 10 is elastically deformed uniformly without being partially deformed, and a stable force is obtained.

FIGS. 4 and 5 relate to the second embodiment of the present invention.
4 is a side view showing a main part of the present invention, and FIG. 5 is a BB of FIG.
It is sectional drawing.

The surgical forceps of the present embodiment has a structure of a rubber 10 and a protection plate 10a as an operation force relaxing means, and an insertion portion 5.
This is different from the first embodiment in that a knob is provided on the. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

As shown in FIG. 4, the operating force relieving means of the surgical forceps of this embodiment is provided with protective plates 10a on both sides of the rubber 10 as shown in FIG.
And the second protection plate 21 are arranged. That is, on the protective plate 10a in contact with the protrusion 6, the rubber 10 fixed to the protective plate 10a, and the opposite side of the protective plate 10a,
The second protective plate 2 is provided between the rubber 10 and the first handle 2a.
It is fixed to the first handle 2a via 1 by means of screws. Further, as shown in FIG. 5, the protection plate 10a and the second
The peripheral portion of the protective plate 21 is bent over the entire circumference in the direction of the rubber 10.

In this embodiment, the first handle 2a is also used.
A knob 22 for rotating the insertion portion 5 and the tip opening / closing portion 3 around the axial direction of the insertion portion 5 is provided at the tip portion.
The operation of this embodiment configured as described above is the same as that of the first embodiment.

In this embodiment, in addition to the same effect as the first embodiment, the spring portion 11 is provided because the plates are arranged on both sides of the rubber 10.
Can be fixed with screws or the like through the second protection plate 21,
Easy to assemble and replace.

Further, in this embodiment, the protective plate 10a and the second
Since the peripheral portion of the protective plate 21 is bent, it is possible to prevent the rubber 10 from being damaged at the edges of the protective plate 10a and the second protective plate 21 when the handle portion 2 is applied with an excessive force equal to or more than the set force. it can.

Further, in this embodiment, since the knob 22 is provided, the tip opening / closing portion 3 can be provided without rotating the handle portion 2.
Since the opening and closing direction of can be freely rotated, the operability is good.

FIG. 6 is a side view including a partial cross section of the handle portion of the surgical forceps according to the third embodiment of the present invention.

The surgical forceps of this embodiment differs from that of the first embodiment in the mounting shape of the protrusion 8 of the first handle 2a and the rubber 10. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

In the surgical forceps of this embodiment, as shown in FIG. 6, a space for accommodating the rubber 10 is provided in the first handle 2a, and the rubber 10 and the protective plate 10a are fixed in this space. . The protruding portion 8 extends in a semicircular shape from the first handle 2a in accordance with the positions of the rubber 10 and the protective plate 10a.

The operation of this embodiment constructed as described above is the same as that of the first embodiment. In the present embodiment, in addition to the effect of the first embodiment, the rubber 10 is arranged in the space inside the first handle 2a and is not exposed to the outside, so that it does not fall.

FIG. 7 is a side view including a partial cross section of a main part of the handle of the surgical forceps according to the fourth embodiment of the present invention.

The surgical forceps of this embodiment is different from that of the third embodiment in the arrangement position of the rubber 10 and the protective plate 10a. Other configurations and operations similar to those of the third embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

As shown in FIG. 7, the surgical forceps of this embodiment has a space for accommodating the rubber 10 in the second handle 2b, and the rubber 10 and the protective plate 10a are fixed to this space. . The protruding portion 8 extends in a semicircular shape from the first handle 2a in accordance with the positions of the rubber 10 and the protective plate 10a, and the outer peripheral portion of the protruding portion 8 comes into contact with the protective plate 10a, A pressing force is applied from the rubber 10 and the protective plate 10a.

The operation of the present embodiment configured as described above,
The effect is the same as that of the third embodiment.

FIG. 8 is an external view including a partial cross section of the surgical forceps according to the fifth embodiment of the present invention.

The surgical forceps of this embodiment differs from that of the first embodiment in the shape and structure of the connecting portion between the operating shaft 4 and the handle portion 25, and the structure of the ratchet portion. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

The surgical forceps of this embodiment has a structure as shown in FIG. That is, the structure of the handle portion 25 is such that the second handle 25 rotatably connected to the rotary shaft 7 provided on the first handle 25 a connected to the insertion portion 5.
It consists of b. The operation shaft 4 that transmits the operation force of the handle portion 25 to the tip opening / closing portion 3, and the first handle 25a and the second handle 25b each have a link 26a having a different length,
It is connected by 26b.

One end of each of the links 26a and 26b has an operating shaft 4
Is rotatably supported by the proximal end of each. Link 2
The other ends of 6a and 26b have a semicircular shape, and oval holes 28a and 28b into which sliding shafts 27a and 27b described later can slide.
Is provided. The oval holes 28a, 28b are slidably connected to sliding shafts 27a, 27b provided in the internal space of the first handle 25a and the second handle 25b.

Further, rubber 29 is provided inside the space.
a, 29b and the protection plates 30a, 30b are arranged, and the rubber 29a and the rubber 2 are used when the force is less than the set force.
9b presses the semicircular outer circumferences of the links 26a, 26b, and the rubbers 29a, 2 in the oval holes 28a, 28b are pressed.
It is set so that the sliding shafts 27a and 27b are located on the side closer to 9b.

Ratchets 31a and 31b as engaging means are provided at the ends of the first handle 25a and the second handle 25b, respectively. This ratchet 31
At least one ratchet tooth 32 is provided on each of the facing surfaces of a and 31b in a shape and position that restricts the movement in the opening direction when the handle portion 25 moves in the closing direction to some extent.

In the present embodiment having the above-described structure, when the handle portion 25 is applied with an amount of force larger than the set value, the rubber 29
a and 29b are deformed, and the oval holes 2 of the links 26a and 26b are deformed.
By the sliding shafts 27a and 27b moving on 8a and 28b, the force applied to the tip opening / closing portion 3 via the links 26a and 26b is reduced.

Further, in the structure of this embodiment, the ratchets 31a and 31b are not engaged at the position shown in FIG.
The engagement is set to start at about the same time that a and 29b start to deform. Therefore, the sliding shaft 2
7a and 27b are the ratchets 31a and 3 in the position of FIG.
1b does not engage, and the handle portion 25 can be arbitrarily opened and closed. Rubber 29 when ratchet engagement is required
If a force amount equal to or greater than the set force amount, which is the force amount when a and 29b start to be deformed from the assembled state, is applied to the handle portion 25, the ratchet is engaged.

In this embodiment, since the link is used,
The shape of the handle portion 25 can be set arbitrarily.

Further, in this embodiment, the rubber 29 and the protective plate 3 are used.
Since 0 is arranged at each of two places, the force can be absorbed and relieved for a larger amount of force.

Further, in the present embodiment, when the ratchet needs to be engaged, it is sufficient to apply a force more than the set force to the handle portion 25. Therefore, the operator can arbitrarily decide whether or not the ratchet should be engaged. Since it can be selected, operability is good.

FIG. 9 is a side view including a partial cross section of the main part of the surgical forceps according to the sixth embodiment of the present invention.

The surgical forceps of this embodiment has a handle portion 36.
The rotation mechanism, the length of the link 39, and the presence or absence of a ratchet are different from the fifth embodiment. Other configurations and operations similar to those of the first to fifth embodiments are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

As shown in FIG. 9, the surgical forceps of the present embodiment has a first handle 36a and a second handle which are attached to rotary shafts 38a and 38b provided on a mounting frame 37 fixed to the insertion portion 5. 36b is configured to be rotatably supported.

The links 39a and 39b have the same shape, and the first handle 36a side and the second handle 36b side are symmetrical with respect to the operation shaft 4.

No ratchet mechanism is provided. The operation and effect of this embodiment configured as described above are the same as those of the fifth embodiment except for the ratchet mechanism.

FIG. 10 is a side view including a partial cross section of the main part of the surgical forceps according to the seventh embodiment of the present invention.

The surgical forceps of this embodiment is different from that of the sixth embodiment in the arrangement position of the rubber as the operation force relaxing means and the protective plate. Other configurations and operations similar to those of the sixth embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

As shown in FIG. 10, the surgical forceps of this embodiment includes an operating shaft 4 for transmitting an operating force of the handle portion 41 to the tip opening / closing portion 3 (not shown), a first handle 41a and a second handle. 41b are links 42a, 4 of the same length.
2b are rotatably connected to each other. This link 42
The other ends of a and 42b are respectively connected to the first handle 41a and the second handle 41a.
A shaft 43 provided in each internal space with the handle 41b of the
It is pivotally supported by a and 43b.

Further, the first handle 41a and the second handle 41b are provided with elliptical holes 44a and 44b at their tip portions, and the elliptical holes 44a and 44b and the insertion portion 5 on the proximal side. Sliding shafts 46a and 46b provided in the space of the mounting frame 45 configured are slidably held. Further, the rubbers 47a and 47b and the protective plates 48a and 48b are provided in the space where the first handle 41a and the second handle 41b of the mounting frame 45 are installed, and the first handle 41a and the second handle 41a are provided. It is set to press 41b.

In the present embodiment constructed as described above, when a force amount equal to or greater than the set force amount is applied to the handle portion 41, the rubber 4
7a and 47b are deformed, and the elliptical holes 44a and 44b of the first handle 41a and the second handle 41b are attached to the sliding shaft 46.
By moving a and 46b, the force applied to the tip opening / closing portion 3 is relaxed.

The effect of this embodiment is the same as that of the sixth embodiment.

In the fifth to seventh embodiments, the example in which the number of the rubber and the number of the protective plate are each two has been described, but the effect and action can be obtained even if each is one or three or more. Does not change.

FIG. 11 is a side view including a partial cross section of the main part of the surgical forceps according to the eighth embodiment of the present invention.

The surgical forceps of this embodiment is different from that of the sixth embodiment in the arrangement position of the rubber as the operation force relaxing means and the protective plate. Other configurations and operations similar to those of the sixth embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

As shown in FIG. 11, the surgical forceps of this embodiment is an example in which the rubber 51 and the protective plate 52 are gathered in one place, and the arrangement position thereof is the proximal end of the operating shaft 4.

That is, the other ends of the links 39a, 39b rotatably supported by the shafts 43a, 43b provided in the spaces of the first handle 53a and the second handle 53b are formed in a semicircular shape, In addition, oval holes 28a and 28b are provided. The mounting frame 54 on the proximal side of the operation shaft 4 has the elliptical hole 2
Sliding shafts 27a and 27b on which 8a and 28b can slide and 1
Rubber 51 and two protective plates 52 fixed on both sides
a and 52b are provided. During normal use in which a force equal to or less than the set force, which is the force when the rubber 51 starts to be deformed from the assembled state, the rubber 51 presses the protection plates 52a and 52b and the links 39a and 39b, respectively. Is set to.

The operation of this embodiment constructed as described above is the same as that of the sixth embodiment.

In this embodiment, in addition to the effect of the sixth embodiment, the links 39a, 39b on both sides can be pressed by one rubber 51, so that the structure is simple and inexpensive, and cleaning and sterilization are easy. Becomes

FIG. 12 is a side view including a partial cross section of the essential part of the surgical forceps according to the ninth embodiment of the present invention.

The surgical forceps of this embodiment is different from that of the eighth embodiment in the arrangement positions of the rubber 57 and the protection plate 58 which are the operation force relaxing means. Other than that, about the same composition and operation as the 8th example, the same numerals are attached and explanation is omitted,
Only the different points will be described.

In the surgical forceps of this embodiment, as shown in FIG. 12, the rubber 57 and the protective plate 58 are integrated in one place, and the arrangement position is the rear end of the operating shaft 4 on the proximal side. Is.

That is, the other ends of the links 39a, 39b rotatably supported by the shafts 43a, 43b provided in the spaces of the first handle 53a and the second handle 53b are formed in a semicircular shape, In addition, oval holes 28a and 28b are provided. The mounting frame 59 on the proximal side of the operation shaft 4 includes one sliding shaft 27 on which the elliptical holes 28a and 28b are slidable, and one sliding shaft 27 each.
A rubber 57 and a protective plate 58 fixed to the rubber 57 are provided. During normal use in which a force equal to or less than the set force is applied, the protective plate 58 and the link 39 are protected by the rubber 57.
It is set so that a and 39b are pressed respectively.

Operation of the present embodiment configured as described above,
The effect is the same as that of the eighth embodiment.

13 to 15 relate to the tenth embodiment of the present invention. FIG. 13 is a partial cross-sectional view showing the structure of surgical forceps and an external view showing a state of grasping a tissue with normal force, and FIG. FIG. 15 is a cross-sectional view taken along the line CC in FIG. 13, showing a state in which the fulcrum has moved due to an amount of force exceeding the setting.

The surgical forceps of this embodiment is different from the first embodiment in the shape of the forceps itself. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

The surgical forceps of this embodiment are shown in FIGS.
As shown in, the handle portion and the tip opening / closing portion are integrated with each other.

The forceps section 61 comprises a first forceps section 61a and a second forceps section 6 in which the tip grip section and the handle section are integrated.
1b. The second forceps 61b is provided with a protrusion 6 in the vicinity of the middle thereof and rotation shafts 7 on both sides thereof.
(FIG. 15) The first forceps 61a has an opening in the vicinity of an intermediate portion through which the second forceps 61b is inserted, and the rotary shaft 7 pivotally supports and slides on both sides of this opening. Oval holes 9 are provided. The rubber 62 and the protective plate 6 are pressed so as to press the outer peripheral portion of the protruding portion 6 provided on the second forceps portion 61b.
3 is provided on the first forceps portion 61a.

Ratchets 64a and 64b are provided at the proximal ends of the first forceps portion 61a and the second forceps portion 61b, respectively.
Is provided and is configured to restrict the movement in the opening direction.

In the present embodiment constructed as described above, as shown in FIG. 13, the elastic force of the rubber 62 presses the rotary shaft 7 in the side of the elliptical hole 9 away from the rubber 62, and It can be opened and closed freely using as a rotation axis. In the state where the tissue 65 is lightly gripped, the elastic force of the rubber 62 prevails, so that the rotating shaft 7 is at the position shown in FIG. 13 and the ratchet mechanism operates at this position. Further, when the amount of operating force of the handle portion is increased to firmly grasp the tissue 65, the rubber 6
2 causes elastic deformation, and as shown in FIG.
Slides in the direction of approaching the rubber 62, and absorbs and alleviates the amount of operating force.

The degree of elastic deformation is determined by the hardness of the rubber 62. If the hardness is increased, it is difficult to deform, and if the hardness is decreased, it is easily deformed with a small amount of operating force.

If the operating force of the handle is weakened,
Since the elastically deformed rubber 62 returns to its original shape,
The rotary shaft 7 returns to the original normal position.

The effects of this embodiment are the same as those of the first embodiment.

FIG. 16 is an external view including a partial cross section showing a first modification of the tenth embodiment.

The surgical forceps of this modification is the ratchet 14
Is an example in which the finger rest 20 and the stopper 15 are provided on the first forceps portion 67a, as in the first embodiment, near the middle of the handle portion.

The operation of this modified example configured as described above is the same as that of the first embodiment.

In this embodiment, since the finger hook 20 is provided on the first handle 67a, the finger does not touch the ratchet lever 14 carelessly, and it is possible to prevent the ratchet teeth 17 from injuring the finger or malfunction of the ratchet. In addition to this, stable opening / closing operation of the handle portion 67 can be performed.

Further, in the present embodiment, since the arrangement position of the ratchet teeth 17 is set to the minimum necessary number of teeth near the position corresponding to the closed position of the tip opening / closing portion, the tip opening / closing portion is almost closed.
That is, since the stopper 15 and the ratchet teeth 17 are engaged only when the second handle 67b is in the closed position,
Since the engagement as a ratchet starts only when an organ or the like is gripped, the handle portion 67 for opening and closing the tip opening / closing portion.
The operability of is good. Moreover, since the number of ratchet teeth 17 is small, it is difficult for a finger to hit the ratchet teeth 17, and an injury can be prevented.

Further, in the present embodiment, since the stopper 15 and the finger hook 20 are integrally provided on the first handle 67a, the number of parts is small and the structure can be inexpensive.

FIG. 17 is an external view showing a second modification of the tenth embodiment.

The surgical forceps of this modification is an example in which the ratchet lever 70, the stopper 71, and the finger hook 72 are arranged at the proximal end of the handle portion.

The operation and effect of this modified example configured as described above are the same as those of the first modified example.

FIG. 18 is an external view showing a third modification of the tenth embodiment.

In the surgical forceps of this modified example, the ratchet lever 14, the stopper 15, and the finger hook 75 are arranged at a position close to the rotating shaft 7 of the handle portion, and further ratchet teeth 17 are provided on the handle side to provide a ratchet. This is an example in which the ratchet lever 14 is moved to the tip side when releasing the engagement.

The operation and effect of this modification constructed as described above are the same as those of the first modification of the tenth embodiment.

FIG. 19 is a side view including a partial cross section of the main part of the handle portion 2 showing a first modification of the above-described first embodiment.

The handle portion 2 of the surgical forceps of this modification is
It comprises a first handle 2a and a second handle 2b. This is an example in which a finger rest 78 is provided below the ring 77a of the first handle 2a, and the first handle 2a, the ring 77a, and the finger rest 78 are arranged on substantially the same straight line 79.

In this modified example constituted as described above, in addition to the operation and effect of the first embodiment, the first handle 2
Since a, the ring 77a, and the finger rest 78 are arranged on substantially the same straight line 79, the handle portion 2 has a shape that makes it easy to grip and force is applied, resulting in good operability.

FIG. 20 is a side view including a partial cross section of the main part of the handle portion 2 showing a second modification of the above-described first embodiment.

The handle portion 2 of the surgical forceps of this modification is
This is an example in which the finger hook of the first handle 2a is modified to the cover 81. The cover 81 is formed by bending a thin plate material made of stainless steel or aluminum material and is detachably fixed to the first handle 2a.

In addition to the functions and effects of the first embodiment, the present modification constructed as described above can be easily attached and detached so that cleaning, sterilization, etc. can be easily performed, and it is made of a thin plate. It is easy to process and can be manufactured at low cost.

FIG. 21 shows a third modification of the first embodiment, which is a modification in which the shape of the handle portion 2 of the first embodiment and the shape of the ratchet portion of the second modification of the tenth embodiment are combined. It is an example, and is an external view showing a main part of this modification.

The operation and effect of this modification constructed as described above are the same as those of the second modification of the tenth embodiment.

In each of the above embodiments, the case where both the rubber and the protective plate are used in combination has been described. However, even if the protective plate is not used and only the rubber is used, the function and effect are the same.

Although the handle portion and the finger rest 20 have been described as a single body, they may each be composed of a plurality of two or more bodies.

Alternatively, the ratchet mechanism may be omitted, or the number and position of ratchet teeth may be set arbitrarily to change the position and range of ratchet operation.

Further, the arrangement of the rotary shaft or the sliding shaft and the elliptical hole is not limited to the case of each embodiment, but may be arranged on opposite members.

The above-described embodiments can be arbitrarily combined without departing from the gist of the present application.

[Appendix] As described in detail above, according to the embodiment of the present invention, the following constitution can be obtained.
That is, [Supplementary Note 1] a handle portion including a first handle and a second handle that are rotatably connected, a tip opening / closing portion that opens and closes by opening / closing operation of the handle portion, and the handle portion on the tip opening / closing portion. Forceps for operating force transmitting means for transmitting the operating force of the operating force, and operating force relieving means for relieving the operating force of a set force or more so as not to be transmitted to the distal end when the force is applied to the handle portion. In, the operating force relaxing means is composed of rubber and at least one protective plate that is in close contact with the rubber.

[Supplementary Note 2] The surgical forceps according to Claim 1 or Supplementary Note 1, wherein the rotation fulcrum portion rotatably connected to the first handle and the operation provided to the second handle. And a substantially oval hole through which the rotation fulcrum portion is slidable. In normal use, the rotation fulcrum portion is moved by the operation force mitigation means to the operation force mitigation means of the substantially oval hole. From the operating force reducing means of the substantially elliptical hole when the handle portion receives an operating force equal to or greater than the set force.

[Supplementary Note 3] A handle portion composed of a first handle and a second handle that are rotatably connected, a tip opening / closing portion that opens and closes by opening / closing operation of the handle portion, and the handle on the tip opening / closing portion. A force is applied to the handle portion, an operation force transmitting means including an operation shaft and at least one link plate for transmitting the operation force of the portion, an insertion portion having a part of the operation force transmitting means built therein so as to be able to advance straight, and the handle portion. In some cases, in the surgical forceps, the operating force alleviating means is made of rubber, and the operating force alleviating means for alleviating an operating force equal to or more than the set amount of force so as not to be transmitted to the distal end portion.

[Supplementary Note 4] A handle portion composed of a first handle and a second handle that are rotatably connected, a tip opening / closing portion that opens and closes by opening / closing operation of the handle portion, and the handle on the tip opening / closing portion. A force is applied to the handle portion, an operation force transmitting means including an operation shaft and at least one link plate for transmitting the operation force of the portion, an insertion portion having a part of the operation force transmitting means built therein so as to be able to advance straight, and the handle portion. At a time, in the surgical forceps having an operating force relaxing means for relaxing an operating force equal to or more than a set force so as not to be transmitted to the distal end portion, the operating force relaxing means is a rubber, and at least one of which is closely attached to the rubber.
It consists of two protective plates.

[Supplementary Note 5] The surgical forceps according to Supplementary Note 3 or 4, wherein at least one handle connected to the proximal side of the insertion portion and the proximal side of the operating shaft of the operating force transmitting means are rotated. At least one link means that is freely connected and has a substantially oval hole at the other end, a sliding shaft that is slidable on the substantially oval hole portion of the link means, and an operation force relaxing means. In normal use, the operating force mitigating means pushes the sliding shaft toward the side closer to the operating force mitigating means of the substantially elliptical hole to operate the handle portion with a force equal to or greater than a preset force. When a force is applied, the sliding shaft is moved to the side of the substantially oval hole farther from the operating force mitigating means.

[Supplementary Note 6] The surgical forceps according to Supplementary Note 3 or 4, wherein at least one handle connected to the proximal side of the insertion portion, and at least one handle rotatably connected, and At least one link means having a substantially oval hole at the other end, a sliding shaft capable of sliding on the substantially oval hole portion of the link means, and an operating force mitigating means, and the operating force transmitting means. And a fixing portion fixed to the proximal side of the operating shaft, and in normal use, the operating force mitigating means presses the sliding shaft toward a side closer to the operating force mitigating means of the substantially oval hole. Then, when an operating force equal to or larger than the set force is applied to the handle portion, the sliding shaft is moved to the side of the substantially oval hole farther from the operating force mitigating means.

[Supplementary Note 7] The surgical forceps according to Supplementary Note 3 or 4, wherein one end is rotatably connected to the proximal side of the sliding shaft of the operating force transmission means and the other end is a handle. At least one link means rotatably connected to the section;
At least one handle portion that is rotatably connected to the link means and has a substantially oval hole in the other portion, a sliding shaft slidable in the substantially oval hole of the handle portion, and an operation force relaxing means. And a fixing portion fixed on the proximal side of the insertion portion, and in normal use, the sliding shaft is moved by the operating force reducing means and the operating force reducing means of the substantially oval hole. When the handle portion receives an operating force equal to or more than the set force, the sliding shaft is moved to the side farther from the operating force mitigating means of the substantially oval hole.

[Supplementary Note 8] The surgical forceps according to Claim 1, Supplementary Notes 1, 3 or 4, wherein the rubber is made of synthetic rubber.

[Supplementary Note 9] In the surgical forceps according to Supplementary Note 8, the synthetic rubber is composed of at least silicone rubber, fluororubber, butyl rubber, ethylene propylene rubber, isoprene rubber, butadiene rubber, or the like.

[Supplementary Note 10] The forceps for operation according to claim 1, Supplementary Notes 1, 3 or 4, wherein the rubber is made of natural rubber.

[Supplementary Note 11] The surgical forceps according to Claim 1 or Supplementary Notes 1 to 5, wherein the tubular insertion portion connecting between the distal end portion and the handle portion, and the operating force of the handle portion are applied to the distal end. And an operating shaft which is transmitted to the portion and extends through the insertion portion.

[Appendix 12] First rotatably connected
Handle portion including the handle and the second handle, a tip opening / closing portion that is opened / closed by opening / closing operation of the handle portion, operation force transmission means for transmitting an operation force of the handle portion to the tip opening / closing portion, and a ratchet opening / closing position. A forceps for positioning by the lever of
A ratchet provided on the second handle in a cantilevered manner;
The ratchet claw provided on the handle and the cover for covering at least a part of the ratchet are provided.

[Supplementary Note 13] In the surgical forceps according to Supplementary Note 12, the cover is provided on the first handle.

[Supplementary Note 14] The surgical forceps according to Supplementary Notes 12 and 13, wherein the tubular insertion portion connecting the distal end portion and the handle portion, and the operating force of the handle portion are transmitted to the distal end portion,
And an operating shaft extending through the insertion portion.

[0131]

As described above, according to the present invention,
Since the elastic member is made of rubber, it is lighter than metal springs and does not require a gap or space for operation.
Easy to wash and sterilize and can be miniaturized.

Further, since the rubber 10 is previously subjected to the compressive force, the rotary shaft 7 which is the rotation center of the handle portion 2 does not move until a force amount equal to or more than the preset value is applied, so that the operability is good.

Further, even if the handle portion is erroneously applied with an excessive amount of force larger than the set value, the excessive amount of force is absorbed and alleviated by the movement of the rotating shaft, and the handle portion 2 and the tip opening / closing portion 3 are excessively large. Since it is possible to prevent the force from being applied, it is possible to improve the durability of the forceps and prevent accidental damage to the organ grasped by the tip opening / closing portion 3.

[Brief description of drawings]

1 to 3 relate to a first embodiment, and FIG. 1 is a partial cross-sectional view showing a structure of surgical forceps and an external view showing a state in which a distal end opening / closing portion is closed.

FIG. 2 is a sectional view showing an AA section of FIG.

FIG. 3 is a side view showing a partial cross-section of a handle portion showing a state in which a tip opening / closing portion is opened.

4 to 5 relate to a second embodiment, and FIG. 4 is a side view showing a main part of surgical forceps.

5 is a sectional view showing a BB section of FIG. 4;

FIG. 6 is a side view including a partial cross section of the handle portion of the surgical forceps according to the third embodiment.

FIG. 7 is a side view including a partial cross section of a main part of the handle of the surgical forceps according to the fourth embodiment.

FIG. 8 is an external view including a partial cross section of the surgical forceps according to the fifth embodiment.

FIG. 9 is a side view including a partial cross-section of a main part of the surgical forceps according to the sixth embodiment.

FIG. 10 is a side view including a partial cross-section of a main part of the surgical forceps according to the seventh embodiment.

FIG. 11 is a side view including a partial cross section of a main part of the surgical forceps according to the eighth embodiment.

FIG. 12 is a side view including a partial cross-section of a main part of the surgical forceps according to the ninth embodiment.

13 to 15 relate to a tenth embodiment,
FIG. 13 is a partial cross-sectional view showing the structure of surgical forceps and an external view showing a state in which a tissue is grasped with normal force.

FIG. 14 is a partial cross-sectional view showing the structure of surgical forceps and an external view showing a state in which a fulcrum has moved due to application of force over a preset value.

FIG. 15 is a cross-sectional view showing a CC cross section of FIG. 13.

FIG. 16 is an external view including a partial cross section of a surgical forceps according to a first modification of the tenth embodiment.

FIG. 17 is an external view of surgical forceps according to a second modification of the tenth embodiment.

FIG. 18 is an external view of surgical forceps according to a third modification of the tenth embodiment.

FIG. 19 is a side view including a partial cross-section of the main part of the handle portion of the surgical forceps according to the first modification of the first embodiment.

FIG. 20 is a side view including a partial cross-section of the main part of the handle portion of the surgical forceps according to the second modification of the first embodiment.

FIG. 21 is an external view showing a main part of surgical forceps according to a third modification of the first embodiment.

[Explanation of symbols]

1 surgical forceps 2, 25, 36, 41, 53, 61 handle portions 2a, 25a, 36a, 41a, 53a, 61a 1st
Handle 2b, 25b, 36b, 41b, 53b, 61b second
Handle 3 Tip opening / closing part 4 Operation shaft 5 Insertion part 6 Projection part 7 Rotating shaft 9, 28a, 28b, 44a, 44b Elliptical hole 10, 29a, 29b, 47a, 47b, 51, 62
Rubber 10a, 30a, 30b, 48a, 48b, 52a, 5
2b, 63 protection plate 11 spring part 21 second protection plate 27a, 27b, 46a, 46b sliding shaft 61 forceps part 61a first forceps part 61b second forceps part

Claims (1)

[Claims] 1. A handle portion comprising a first handle and a second handle that are rotatably connected, a tip opening / closing portion that opens and closes by an opening / closing operation of the handle portion, and a handle portion on the tip opening / closing portion. Operating force transmitting means for transmitting operating force,
In the surgical forceps, which has an operating force mitigating means for mitigating an operating force equal to or more than a preset force amount so as not to be transmitted to the distal end portion when the force is applied to the handle portion, the operating force mitigating means is made of rubber. Surgical forceps characterized by the above.