JPH0838497A - Endoscopec grasping forceps - Google Patents

Abstract

PURPOSE:To prevent the head part of a head grasping part and an elastic grasping member from projecting outside beyond the outer circumferent face of an inserting part when the elastic grasping part is pulled into the inserting part. CONSTITUTION:An elastic grasping part 3 is composed of three elastic grasping members 31, 32, 33 and circular claw parts 31a, 33a are attached on the head part of these elastic grasping members 31, 32, 33 as head grasping parts. These circular claw parts 31a, 33a are folded smoothly toward inside against the moving direction of an operating wire 25. And an inclination angle theta made by the circular claw part 31a which is arranged at the most proximal place of the head face of the inserting part 2a with the elastic grasping member 33 which is provided with the circular claw part 33a arranged at the most distal place from the inserting head face 2a is set for an obtuse angle, and thereby, the circular claw part 31a comes into contact with the elastic grasping member 33, and the head part of the elastic grasping member 33 and the circular claw part 33a are prevented from projecting outside beyond the outer circumferent face of the inserting part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used by inserting a treatment instrument insertion channel provided in an endoscope into an endoscope for grasping and extracting an object such as a foreign substance or polyp in a body cavity. For grasping forceps.

[0002]

2. Description of the Related Art In recent years, in addition to the examination of the inside of a body cavity by an endoscope, a grasping for an endoscope such as a biopsy forceps or a grasping forceps is performed through a treatment instrument insertion channel provided in the endoscope. Insert forceps into the body cavity to grasp and remove foreign matter,
The test cell tissue and the like are collected.

For example, an endoscope grasping forceps disclosed in Japanese Utility Model Laid-Open No. 5-62214 discloses an operating wire and an elastic gripping portion formed by connecting a plurality of elastic gripping members to the distal end of the operating wire. Is placed inside the elongated insertion portion formed by covering the outer circumference of the flexible coil sheath with a flexible resin tube, and the finger-hanging member operated by the operator is connected to the proximal end of the operation wire. Is configured.

Then, the tip end portions of the plurality of elastic gripping members constituting the elastic gripping portion of the endoscopic grasping forceps are bent at substantially right angles to the central axis of the inserting portion of the endoscopic grasping forceps. A grip is provided. Furthermore, since the plurality of distal end gripping members have a bending tendency using the elastic restoring force of each elastic gripping member, when the finger hook member of the operating portion is pushed out, the elastic gripping portion causes the distal end of the insertion portion to move. Each elastic gripping member projects from the member and expands outward from the central axis direction of the insertion portion.

That is, the operator pushes and pulls the finger-hooking member to move the operation wire forward and backward, and the elastic gripping portion is projected and retracted from the cylindrical tip member installed at the distal end of the insertion portion in accordance with the forward and backward movement of the operation wire. The tip gripping portion formed of a plurality of elastic gripping members is opened and closed to extract and collect foreign matter and test cell tissue.

Further, when the finger gripping member of the operating portion is operated to cause the elastic grip portion to project and retract from the tip member at the tip of the insertion portion,
The length of each elastic gripping member is adjusted so that the end gripping parts of the elastic gripping members that form the elastic gripping part do not come into contact with each other, and the end gripping parts are axially displaced and aligned. I'm trying to converge.

[0007]

However, for example, as shown in FIG. 7A, the elastic grasping portion 81 of the endoscopic grasping forceps 80a is pulled toward the operator side (not shown) to the elastic grasping member 82, When the members 83, 84 are drawn into the inner holes of the tubular tip member 86 of the insertion portion 85, the insertion portion tip surface 85
As shown by A in the figure, the distal end grip portion 82a arranged closest to a and the elastic grip member 84 provided with the distal end grip portion 84a arranged farthest from the insertion portion distal end surface 85a contact each other. There is a possibility that the elastic gripping member 84 may be pushed out to the outside of the outer peripheral surface of the insertion portion 85 due to the contact.

Similarly, as shown in FIG. 2B, the elastic gripping member 8 of the elastic gripping portion 87 of the endoscopic gripping forceps 80b.
When 8, 89, 90, 91, 92 are drawn into the inner hole of the tubular tip member 86, the tip grip portion 88a arranged closest to the insertion portion tip surface 85a and the insertion portion tip surface 85.
The elastic gripping member 92 provided with the distal end gripping portion 92a disposed farthest from a is brought into contact with the elastic gripping member 92 as shown by B in the figure, and the elastic gripping member 92 is pushed outward from the outer peripheral surface of the insertion portion 85. There is a risk that

For this reason, when the endoscopic grasping forceps is removed from the treatment instrument insertion channel of the endoscope (not shown), the tip grasping portion and the elastic grasping member come into contact with each other, and the tip portion or the tip of the elastic grasping member is contacted. It is conceivable that the grasping forceps for the endoscope may be pulled out without noticing that the distal end grasping portion provided in the portion protrudes outward from the outer peripheral surface of the insertion portion. Should the tip of the elastic gripping member or the tip gripping part project outside the outer peripheral surface of the insertion part of the endoscopic gripping forceps, the inner surface of the treatment instrument insertion channel may be damaged or the elastic gripping part may be damaged. Shape is deformed, or the amount of insertion / removal force is increased due to the frictional resistance generated between the distal end grip and the treatment instrument insertion channel, which deteriorates operability, or the amount of insertion / removal force is increased. However, there is a possibility that the grasping forceps for the endoscope may be forcibly pulled out from the channel for inserting the treatment tool and the grasping forceps for the endoscope may be broken.

The present invention has been made in view of the above circumstances, and when the elastic gripping portion is pulled into the insertion portion, the plurality of elastic gripping members forming the elastic gripping portion are arranged, for example, closest to the tip end surface of the insertion portion. The distal end grip of the elastic gripping member and the elastic gripping member provided with the distal end gripping part arranged farthest from the distal end surface of the insertion part come into contact with each other, so that the distal end gripping part or the distal end part of the elastic gripping member comes out from the outer peripheral surface of the insertion part An object is to provide an endoscopic grasping forceps that does not protrude to the outside.

[0011]

In the grasping forceps for an endoscope of the present invention, an operation wire is inserted into an elongated and flexible insertion portion so as to be able to advance and retreat, and a bending tendency is formed at the distal end portion of the operation wire. The elastic gripping portion formed by a plurality of attached elastic gripping members is connected, and the operating wire provided on the proximal end of the operating wire is operated to move the operating wire forward and backward to move the elastic gripping portion. An endoscopic grasping forceps that opens and closes, wherein a distal end grip portion arranged closest to the distal end surface of the insertion portion is bent at an inclination angle, or arranged farthest from the distal end surface of the insertion portion. An elastic gripping member provided with a distal end grip portion is provided with a bent portion, and the distal end grip portion is disposed at least closest to the distal end surface of the insertion portion, and the distal end is disposed farthest from the distal end surface of the insertion portion. Tilted elastic gripping member with gripping part They are arranged in a location relationship.

[0012]

According to this structure, when the operation wire of the grasping forceps for an endoscope is pulled toward the operator's side and the elastic gripping portion composed of a plurality of elastic gripping members is pulled into the flexible insertion portion, at least the insertion portion is inserted. Since the distal end grip portion arranged closest to the distal end surface and the elastic grip member provided with the distal end grip portion arranged farthest from the distal end surface of the insertion portion are arranged in an inclined positional relationship, the insertion portion The tip gripping portion closest to the tip end surface does not come into contact with the elastic gripping member having the tip gripping portion at the position farthest from the tip end surface of the insertion portion. For this reason, the tip gripping portion provided on the elastic gripping member and the tip end portion of the elastic gripping member are not extruded to the outside of the outer peripheral surface of the insertion portion, and the tip gripping portions provided on the plurality of elastic gripping members are not attached to the outer circumference of the insertion portion. It is located on the inner side of the surface, and converges side by side in the axial direction of the insertion portion.

[0013]

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, and FIG. 1 is an explanatory view showing an outline of a use state of grasping forceps for an endoscope,
FIG. 2 is a cross-sectional view showing a schematic configuration of a distal end portion of an insertion portion of the endoscopic grasping forceps, and FIG. 3 is an explanatory view showing an elastic grasping portion of the endoscopic grasping forceps.

As shown in FIG. 1, the grasping forceps 1 for an endoscope is
From the treatment instrument insertion opening 11 provided in the endoscope 10, the insertion portion 2 of the endoscopic grasping forceps 1 is inserted into a forceps channel (not shown) provided inside the endoscope insertion portion 12 and guided into the body cavity. . The endoscopic grasping forceps 1 is configured to grasp and extract an object such as a foreign substance or polyp in a body cavity.
For example, it is connected to an insertion portion 2 in which an elastic gripping portion 3 composed of three elastic gripping members 31, 32, 33 is mounted, and an operation wire described later for opening and closing the elastic gripping portion 3 mounted on the distal end side of the insertion portion 2. The operation unit 4 includes the finger hook member 4a.

As shown in FIG. 2, the insertion portion 2 of the grasping forceps 1 for an endoscope is made of a metal and has a cylindrical distal end member 21, a flexible distal end side coil sheath 22 and a proximal end side coil sheath 23.
To connect the tip member 21 and the tip side coil sheath 2
2 and the outer sheath tube 2 on the outer circumference of the proximal coil sheath 23.
4 is covered.

An operating wire 25 is inserted through the inside of the insertion portion 2, and one end of a joint pipe 26 is fixed to the tip of the operating wire 25. The connecting pipe 2
At the other end of 6, the three elastic gripping members 31, 32, 33 forming the elastic gripping part 3 are bundled and fixed.

The proximal end of the operating wire 25 has a distal coil sheath 22 and a proximal coil sheath 23.
It is fixed to the finger-hooking member 4a of the operation portion 4 provided on the operator's hand side through the inside of the and so that the push / pull operation can be performed.

Here, the elastic grip portion 3 will be described.
As shown in FIG. 3, the elastic gripping part 3 capable of recovering a target tissue in a body cavity without damaging the tissue is composed of three elastic gripping members 31, 32, 33. Circular claw portions 31a, 32a formed by bending a substantially circular shape at the tip portions of 32, 33 as tip holding portions,
33a is provided. These circular claw portions 31a, 32a,
33a is smoothly bent inward with respect to the moving direction of the operation wire 25.

Then, the elastic gripping member 3 provided with the circular claw portion 31a arranged closest to the insertion portion distal end surface 2a and the circular claw portion 33a arranged farthest from the insertion portion distal end surface 2a.
3 is set to be an obtuse angle, and the circular claw portion 31a comes into contact with the elastic gripping member 33 so that the elastic gripping member 33 can be held.
The tip portion and the circular claw portion 33a are prevented from protruding outward from the outer peripheral surface of the insertion portion 2.

Elastic gripping members 31, 32, 3 constituting the elastic gripping portion 3 by pulling an operating wire (not shown).
When 3 is housed in the distal end member 21 and the distal end side coil sheath 22, the circular claw portions 31a, 32a, 33a provided on the distal end side of the elastic gripping members 31, 32, 33 are arranged along the axial direction of the insertion portion 2. The lengths of the three elastic gripping members 31, 32, 33 are adjusted so that they converge side by side so that the tip gripping portions 31a, 32a, 33a do not come into contact with each other.

When the elastic gripping portion 3 is pushed out from the distal end side coil sheath 22 and the distal end member 21 by pushing out the finger hooking member 4a of the operating portion 4 located on the proximal side of the endoscopic grasping forceps 1, this elasticity In consideration of the elastic restoring force of the elastic gripping members, the elastic gripping members 31, 32, 33 constituting the gripping part 3 are expanded outward from the central axis direction of the insertion part 2 in order to expand the elastic gripping parts. Members 31, 32,
33 has a bending tendency.

The operation of the endoscopic grasping forceps 1 configured as described above will be described. First, with the operation wire 25 of the endoscopic grasping forceps 1 being pulled, that is, with the circular claw portions 31a, 32a, 33a of the elastic grasping portion 3 being closed, the endoscope 10 inserted near the polyp. The grasping forceps 1 for endoscope is inserted into the body cavity from the treatment instrument insertion opening 11 through the treatment instrument insertion channel.

Then, the finger-hanging member 4a provided on the operating portion 4 of the endoscopic grasping forceps 1 is pushed out to move the operating wire 25 to the distal end side. Then, the elastic gripper 3 disposed on the distal end member 21 and the distal end side coil sheath 22 provided on the distal end side of the insertion part of the endoscopic grasping forceps 1 is pushed out from the insertion part 2, and the elastic gripping members 31, 3 are provided.
Circular claw portions 31 provided at the tips of the elastic gripping members 31, 32, 33 by the elastic restoring force of each of 2, 3
a, 32a, 33a expand from the central axis direction of the insertion portion 2 toward the outer side.

Next, the finger hooking member 4a of the operation portion 4 is pulled to move the operation wire 25 to the hand side. Then, the elastic gripping members 31, 32, 33 are gradually accommodated inside the distal end member 21 and the distal end side coil sheath 22 of the insertion portion 2, and the circular claws 31a, 32a, 33a are closed to grip the polyp. Then, the endoscopic grasping forceps 1 in which the elastic grasping portion 3 is closed is removed from the treatment instrument insertion channel of the endoscope 10.

Incidentally, the circular claw portions 31a, 32a, 33
For the sake of safety, the bent portions of the elastic gripping members 31, 32, 33 and the tip surfaces are curved to be smooth so that the inside of the body cavity is not damaged by a.

In this way, the inclination angle θ is an obtuse angle with respect to the elastic gripping member provided with the distal end grip portion disposed closest to the distal end surface of the insertion portion and the distal end grip portion disposed farthest from the distal end surface of the insertion portion. Since it is bent inward so that when the operating part is pulled and the elastic gripping part is housed in the insertion part, the elastic gripping part and the insertion part tip that are arranged closest to the distal end surface of the insertion part. The elastic gripping member provided with the distal end gripping portion disposed farthest from the end does not come into contact with the elastic gripping member and the distal end portion of the elastic gripping member is pushed out to the outside of the outer peripheral surface of the insertion portion. Are located inside the outer peripheral surface of the insertion portion and can be converged side by side along the axial direction of the insertion portion.

Further, the angle of inclination θ of the elastic gripping portion arranged closest to the distal end surface of the insertion portion with respect to the elastic gripping member provided with the distal end gripping portion arranged farthest from the distal end surface of the insertion portion.
By bending inward so that the angle is obtuse, the diameter of the circular claw part of the elastic gripping part located closest to the distal end surface of the insertion part must be smaller than the diameter of the circular claw part of the other elastic gripping part. Instead, it can be formed to have the same diameter as the circular claw portion of the other elastic grip portion.

As shown in FIG. 4, for example, in the grasping forceps 1a for an endoscope in which the elastic grasping portion 3a is composed of elastic grasping members 34, 35, 36, 37, 38, the distal end surface 2a of the inserting portion is formed.
Of the distal end grip portion 34a arranged closest to the elastic grip member 38 provided with the circular claw portion 38a arranged farthest from the distal end surface 2a of the insertion portion at an acute angle and bent inward. Also by the above, it is possible to obtain the same action and effect as those of the endoscopic grasping forceps 1 in which the inclination angle is an obtuse angle.

FIG. 5 is an explanatory view showing an elastic grip portion of the gripping forceps for an endoscope according to the second embodiment of the present invention. As shown in the figure, in the endoscopic grasping forceps 1b, the insertion portion 2b is formed by the tip member 21 and the coil sheath 27, and the outer circumference of the tip member 21 and the coil sheath 27 is different from that of the first embodiment. The tube 24 is not covered. Further, the elastic gripping portion 40 is composed of three elastic gripping members 41, 42, 43. The tips of the elastic gripping members 41, 42, 43 serve as tip gripping portions, and the circular claw portion of the first embodiment. 31
Instead of a, 32a, 33a, elastic gripping members 41, 4
Bending claw portions 41a, 41b, 41c are formed by bending the tip portions of 2, 43 inward by about 1 mm.

Then, similarly to the first embodiment, the bent claw portion 41a arranged closest to the insertion portion distal end surface 2c is the bent claw portion 43 arranged farthest from the insertion portion distal end surface 2c.
The inclination angle θ2 is made obtuse with respect to the elastic gripping member 43 provided with a. Other configurations, operations, and effects are the same as those in the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

The elastic gripping member 43 provided with the bent claw portion 43a of the bent claw portion 41a arranged closest to the insert portion distal end surface 2c is disposed farthest from the inserted portion end surface 2c.
Even if the inclination angle with respect to is acute, the same action and effect as in the first embodiment can be obtained. In addition, the bent claw portions 41a, 42
The edges around a and 43a are chamfered so that the inside of the body cavity is not damaged. Further, since the bending claw portion 41a is provided so as to be inclined, the length of the bending claw portion 41a arranged closest to the insertion portion distal end surface 2c is the same as the length of the other bending claw portions 42a and 43a. Thus, all the bent claw portions 41a, 42a, 43a can be aligned and housed inside the outer peripheral surface of the insertion portion.

FIG. 6 is an explanatory view showing an elastic grip portion of the gripping forceps for an endoscope according to the third embodiment of the present invention. Figure (a)
And as shown in (b), the grasping forceps 1 for an endoscope of the present embodiment.
The elastic gripping portion 5 of c is an elastic gripping member 3 provided with a circular pawl portion 31a arranged closest to the insertion portion distal end surface 2a and a circular pawl portion 33a arranged farthest from the insertion portion distal end surface 2a.
3 is arranged in an inclined manner, the insertion portion 2 is formed instead of inclining and bending the circular claw portion 31a arranged closest to the insertion portion distal end surface 2a with respect to the elastic gripping member 33. A bent portion 51 is provided substantially at the center of the elastic gripping member 33 housed in the distal end member 21 and the distal end side coil sheath 22.

That is, the circular claw portion 31a disposed closest to the insertion portion distal end surface 2a is bent inward at about 90 degrees with respect to the elastic grip member 31 and is disposed farthest from the insertion portion distal end surface 2a. Elastic gripping member 3 provided with circular claw portion 33a
3 is provided with a bent portion 51 to expand the elastic gripping member 33 from the central axis direction toward the outer side.

As a result, when the elastic gripping portion 5 is pulled from the open state to the closed state by pulling the operating wire (not shown), the circular claw portion 31a arranged closest to the distal end surface 2a of the insertion portion is inserted into the distal end of the insertion portion. The elastic gripping member 33 provided with the circular claw portion 33a arranged farthest from the surface 2a is prevented from abutting. Other configurations are the same as those in the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

Endoscopic grasping forceps 1 configured as described above
The action of c will be described. When the elastic gripping portion 5 of the endoscopic grasping forceps 1c is opened, a finger hooking member provided on an operation unit (not shown) of the endoscopic grasping forceps 1c is pushed out to move the operation wire to the distal end side. To move. Then, as shown in (a) of FIG. 6, the elastic grasping portion 5 disposed on the distal end member 21 and the distal end side coil sheath 22 of the inserting portion distal end of the endoscope grasping forceps 1c is pushed out from the inserting portion 2,
The elastic gripping members 31, 32, 33 expand the circular claw portions 31 a, 32 a, 33 a by the elastic restoring force from the central axis direction of the insertion portion 2 toward the outer side.

On the other hand, when the elastic gripping portion 5 is closed, the finger hooking member is pulled to move the operation wire toward the hand side so that the elastic gripping members 31, 32, 33 are inserted into the distal end member of the insertion portion 2. 21 and the tip side coil sheath 22 are gradually accommodated. Then, as shown in (a) of the figure, the elastic gripping member 33 comes into contact with the inner peripheral surface of the distal end member 21 and the distal end gripping portion 33a gradually closes. At this time, since the tip end side of the bent portion 51 formed in the elastic gripping member 33 expands from the central axis direction toward the outer side,
The elastic gripping member 33 and the distal end grip portion 31a arranged closest to the distal end of the insertion portion are accommodated without coming into contact with each other.

Further, when the operating wire is pulled, the bent portion 51 of the elastic gripping member 33 passes through the inner peripheral surface of the tip member 21 and spreads outward as shown in FIG. 33 is in contact with the inner peripheral surface of the tip member 21, and the circular claw portion 3 is disposed closest to the tip surface 2a of the insertion portion.
1a does not come into contact with a portion of the elastic gripping member 33 provided with the distal end gripping portion 33a arranged farthest from the insertion portion distal end surface 31a, and the distal end gripping portion 33a and the distal end of the elastic gripping member 33 do not come into contact with each other. As for the portion, the insertion portion 2 converges inside the outer peripheral surface of the insertion portion 2 and side by side along the insertion portion axial direction. Other actions and effects are similar to those of the above-described embodiment.

The assembly of the endoscopic grasping forceps 1 of the first embodiment and the endoscopic grasping forceps 1c of the third embodiment will be described. In the case of the endoscope grasping forceps 1 of the first embodiment, when the circular claw portion 31a is provided with an inclination angle so that the circular claw portion 31a and the elastic grasping member 33 do not come into contact with each other, each elastic grasping member is formed. It is difficult to set the inclination angle θ in advance because there are individual differences in the angle. Therefore, the inclination angle θ is adjusted after the grasping forceps for the endoscope is assembled.

On the other hand, in the case of the endoscope grasping forceps 1c of the third embodiment, the elastic grasping member 33 and the circular claw portion 31 are provided.
In the first embodiment, the angle of the bent portion 51 that prevents the distal end portion of the elastic gripping member or the circular claw portion 33a from being pushed outward from the outer peripheral surface of the insertion portion 2 by contacting a is preset. Although it is difficult for the same reason as described above, since the bending angle at the time of manufacturing is small, stress is not concentrated on the bending portion, and there is an advantage that adjustment after assembling from the endoscope grasping forceps 1c of the first embodiment can be easily performed. is there.

[Additional Notes] (1) While the operation wire is inserted into the elongated and flexible insertion portion so as to be able to advance and retreat, the elasticity formed by a plurality of elastic gripping members having a bending tendency at the tip of the operation wire In the grasping forceps for an endoscope, which connects the proximal end portion of the grasping portion, operates the operating portion provided at the proximal end portion of the operating wire to move the operating wire forward and backward, and opens and closes the elastic grasping portion, Of the elastic gripping portions, at least the distal end gripping portion arranged closest to the distal end surface of the insertion portion and the elastic gripping member provided with the distal end gripping portion arranged farthest from the distal end surface of the insertion portion are in a tilted positional relationship. Grip forceps for the endoscope to be placed.

(2) The tip grip portion arranged closest to the tip surface of the insertion portion is bent at an inclination angle, and the tip grip portion arranged closest to the tip surface of the insertion portion and the tip surface of the insertion portion 2. The grasping forceps for an endoscope according to appendix 1, which has an inclined positional relationship with an elastic grasping member provided with a distal end grasping portion arranged farthest.

(3) The inclination angle between the distal end grip portion arranged closest to the distal end surface of the insertion portion and the elastic gripping member provided with the distal end grip portion disposed farthest from the distal end surface of the insertion portion is an obtuse angle. The grasping forceps for an endoscope according to appendix 2.

(4) The inclination angle between the distal end grip portion arranged closest to the distal end surface of the insertion portion and the elastic gripping member provided with the distal end grip portion disposed farthest from the distal end surface of the insertion portion is an acute angle. The grasping forceps for an endoscope according to appendix 2.

(5) The elastic gripping member provided with the distal end gripping portion arranged farthest from the distal end surface of the insertion portion is provided with a bent portion, and the distal end gripping portion disposed closest to the distal end surface of the insertion portion, and the insertion portion. The grasping forceps for an endoscope according to appendix 1, wherein an elastic grasping member provided with a distal end grasping portion disposed farthest from the distal end surface of the portion has a tilted positional relationship when in an open state.

(6) Due to the bent portion provided substantially at the center of the elastic gripping member provided with the distal end gripping portion arranged farthest from the distal end surface of the inserting portion, the distal end side portion of the elastic gripping member is positioned at the central axis of the inserting portion. The grasping forceps for an endoscope according to appendix 5, which expands to the outside of the.

(7) The endoscopic grasping forceps according to appendices 2 and 5, wherein the tip grasping portion is a circular claw portion.

(8) The endoscopic grasping forceps according to appendices 2 and 5, wherein the tip grasping portion is a bent claw portion.

[0048]

As described above, according to the present invention, when the elastic gripping portion is pulled into the insertion portion, the plurality of elastic gripping members constituting the elastic gripping portion are arranged, for example, closest to the tip end surface of the insertion portion. The tip gripping part and the tip end part of the elastic gripping member are contacted with the elastic gripping member provided with the tip gripping part arranged farthest from the tip end surface of the insertion part so that the tip end part of the elastic gripping member is outside the outer peripheral surface of the insertion part. It is possible to provide a grasping forceps for an endoscope that does not protrude to the outside.

[Brief description of drawings]

1 to 3 relate to a first embodiment of the present invention,
FIG. 1 is an explanatory diagram showing an outline of a usage state of grasping forceps for an endoscope.

FIG. 2 is a sectional view showing a schematic configuration of a distal end portion of an insertion portion of a grasping forceps for an endoscope.

FIG. 3 is an explanatory view showing an elastic grip portion of the gripping forceps for an endoscope.

FIG. 4 is an explanatory view showing an elastic grasping portion of another endoscopic grasping forceps.

FIG. 5 is an explanatory diagram showing an elastic grip portion of the endoscopic grip forceps according to the second embodiment of the present invention.

FIG. 6 is an explanatory view showing an elastic grip portion of the endoscopic grip forceps according to the third embodiment of the present invention.

FIG. 7 is an explanatory view showing an elastic grip portion of a conventional gripping forceps for an endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscopic gripping forceps 2 ... Insertion part 3 ... Elastic gripping part 31a ... Tip gripping part 33 ... Elastic gripping member θ ... Inclination angle

Claims (3)

[Claims] 1. A base of an elastic gripping portion formed by a plurality of elastic gripping members having a distal end portion of the operation wire inserted in a slender and flexible insertion portion so as to be able to move back and forth. Connecting the end portion, operating the operating portion provided at the proximal end of the operating wire to move the operating wire forward and backward,
In the endoscopic grasping forceps that opens and closes the elastic grasping part, a distal end grasping part of the elastic grasping part arranged at least closest to a distal end surface of the insertion part, and a distalmost part arranged farthest from the distal end surface of the insertion part. An endoscopic grasping forceps, wherein an elastic grasping member provided with a distal end grasping portion is arranged in an inclined positional relationship. 2. A distal end grip portion disposed closest to the distal end surface of the insertion portion is bent at an inclination angle, and a distal end grip portion disposed closest to the distal end surface of the insertion portion and a distal end surface closest to the distal end surface of the insertion portion. The grasping forceps for an endoscope according to claim 1, wherein an elastic grasping member provided with a distal end grasping portion arranged at a distance is brought into a tilted positional relationship. 3. An elastic gripping member provided with a distal end gripping portion arranged farthest from the distal end surface of the insertion portion, a bending portion being provided, and a distal end gripping portion arranged closest to the distal end surface of the insertion portion, and an insertion portion. The endoscopic grasping forceps according to claim 1, wherein an elastic grasping member provided with a distal end grasping portion arranged farthest from the distal end surface is in an inclined positional relationship.