JPH0731585A - Endoscope - Google Patents

Abstract

PURPOSE:To stably conduct fine operation of a treatment instrument by providing a forceps port base part with a finger pressing part in the case of inserting a treatment instrument from a forceps port of an operation part to give medical treatment. CONSTITUTION:A forceps port base part 12a having a forceps port A where a treatment instrument 8 is inserted is formed extending obliquely from the main body part on an operation part 2 for bending an insert part 3 inserted in the inside of a testee, and a finger pressing part 22 formed by a recess or a projection is formed on the slant face part of the forceps port base part 12a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a forceps mouth base in an endoscope having an insertion section and an operating section.

[0002]

2. Description of the Related Art Conventionally, an insertion portion of an endoscope is inserted into a subject, and a forceps port is formed on an operation portion of the endoscope. From the forceps port, forceps tubes and crabs are inserted. Various treatment tools, such as a tube, are inserted, and the distal end portion of the treatment tool is projected from the distal end opening of the insertion portion, and various treatments are performed by operating the treatment tool while observing a photographed image.

[0003]

However, the above-mentioned endoscope has a problem that it is difficult to obtain stable operability when a fine operation by the treatment tool inserted from the forceps port is required. .

That is, in the endoscope, the position and pointing direction of the tip of the insertion portion are adjusted by operating the bending operation knob of the operation portion, and the treatment instrument inserted from the forceps port extends from the opening at the tip of the insertion portion. The distal end of the treatment instrument is inserted into or removed from a predetermined site of the subject while monitoring the radiographic image. It requires skill to monitor the two-dimensional image and requires treatment. When moving a small amount, the base portion of the treatment tool protruding outward from the forceps opening is held with a fingertip and operated in the axial direction.
When the hands and arms are floating in the air without being supported, it is difficult to perform stable micromovement.

In view of the above circumstances, an object of the present invention is to provide an endoscope in which a treatment instrument inserted through a forceps port can be easily operated for minute fluctuations.

[0006]

An endoscope of the present invention for achieving the above object comprises an insertion portion to be inserted into a subject, and an operation portion for performing bending operation of the insertion portion. The operation portion is formed with a forceps mouth base portion that extends obliquely from the main body portion, and the treatment tool is inserted into the forceps tube from the forceps mouth formed at the center of the forceps mouth base portion so as to protrude from the tip of the insertion portion. When performing a treatment, a concave portion or a protrusion is formed on the inclined surface portion of the forceps opening base portion, and is configured as a finger contact portion when operating the treatment tool inserted from the forceps opening.

[0007]

According to the above configuration, when performing a slight variation operation of the treatment instrument inserted from the forceps port of the operation section, the treatment instrument is held by the operating fingers such as the thumb and the index finger, and the other middle finger or ring finger or By holding the little finger against the finger rest formed on the slope of the forceps mouth base where the above forceps mouth is formed, the little finger is slightly misaligned due to this fixation. The operation is stable and easy.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a main part of an endoscope in a used state according to an embodiment.

The endoscope 1 is provided with an operating section 2 which an operator holds and performs various operations, and an insertion section 3 on the distal end side (the distal end portion is not shown) to be inserted into a subject. The operation section 2 is composed of a main body case 10 at the base end, a grip case 11 and a branch case 12 that are connected to the main body case 10 in this order.

On the other hand, although not shown, the insertion portion 3 is provided with a bending portion capable of being bent and deformed in an arbitrary direction, and a tip observing portion is installed on the tip side of the bending portion, and an image is formed at this tip portion. Various members such as an optical system such as a sensor and an imaging objective lens are installed. Further, a forceps tube for guiding the treatment tool 8 such as a forceps or a cannulation tube, an air supply / water supply tube for supplying air or water, etc. are inserted into the insertion portion 3 at the distal end opening, and the proximal end side of the curved portion is inserted. A flexible part 13 having flexibility is connected to the operation part 2 for performing various operations such as photographing and bending operation on the proximal end side of the flexible part 13.
Are connected.

The main body case 10 of the operation section 2 has a bending operation mechanism (not shown) inside, and has up and down and left and right operation knobs for operating the bending operation mechanism on the opposite side of the drawing. , Air / water supply valve 17, suction valve 1
8. A photographing switch 19 is installed, and further, a light guide and other various tubes connected to an illumination light source (not shown), and a flexible connecting portion 20 for leading out cords are connected.

Further, the grip case 11 is formed into a thin and circular shape from the connecting portion with the main body case 10 and is connected to the branch case 12. Inside the grip case 11, a connecting mechanism for connecting the operation wire from the bending portion to the bending operation mechanism, a stopper mechanism for restricting the bending amount, and the like are arranged.

The branch case 12 is provided with a forceps opening base 12a on its outer surface that projects obliquely to the side.
A forceps port A for inserting the treatment tool 8 such as forceps is formed at the center of 12a.

The forceps opening base 12a of the branch case 12 is
As shown in FIG. 2, the branch case 12 is formed in a tubular shape projecting obliquely laterally from the pipe-shaped main body, and is connected to a forceps mouth pipe tool 26 (base) inside the forceps mouth stand 12a. A tube 28 is attached, and a forceps port A for inserting a treatment tool 8 such as forceps or a cannula tube is formed in the central portion of the tube. Further, as shown in FIG. 3, a finger contact portion 22 having a concave shape is formed on the front slope portion of the forceps mouth base portion 12a. In addition, sub-water supply system piping tools 24, 25 are provided near the forceps mouth base 12a.

Further, a branch member 27 is provided on the forceps opening branch portion 5 in the branch portion case 12 so as to be connected to an inner end portion of a connecting pipe 28 mounted on the forceps opening base portion 12a. . The branch member 27 has a three-pronged shape and is a forceps port connection portion 27 that is directed in an oblique direction.
The inner end of the connecting pipe 28 is screwed and connected to a, and the forceps tube 29 extending to the distal end of the insertion portion 3 is connected to the tube connecting portion 27b on the distal end side by a fastening metal fitting 31 and branched from the intermediate portion. The suction tube 30 is connected to the pipe-shaped suction tube connecting portion 27c, and the suction tube 30 is connected to the gripping case 11.
To the inside of the main body case 10 and is connected to the suction valve 18.

Then, the treatment instrument 8 inserted from the forceps port A is inserted into the forceps tube 29 through the forceps port piping tool 26 and the connection tube 28 and the branching member 27 so that the inside of the insertion section 3 is closed. It is guided to the tip side and extended from the tip opening.

The connecting structure of the branch case 12 is as follows.
A chassis extending from the main body case 10 to the grip case 11 at the rear end of the reinforcing tubular member 35 arranged along the inner peripheral surface.
The distal end of 36 is connected via a connecting metal fitting 37, while the connecting metal fitting 42 provided at the proximal end of the insertion portion 3 is connected to the distal end via a sleeve-shaped hollow member 41.

An opening 35c is formed in the tubular member 35 in the portion corresponding to the forceps mouth base 12a, and the lower end of the connecting pipe 28 is inserted and connected to the branch member 27 installed inside. . The tubular member 35 is divided at the dividing portion D into a tip side tubular member 35a and a main body side tubular member 35b. The tip end side tubular member 35a and the main body side tubular member 35b are fitted to each other at their split ends, and are connected and fixed by tightening a screw 38 from the outside. In the main body side tubular member 35b,
The connection parts 24a, 25a to the tubes 32, 32 on the inner side of the auxiliary water supply pipe fittings 24, 25 are fixed, and the outer cap parts 24b, 25b penetrate the branch part case 12 to the connection parts 24a, 25a. Are linked together.

Although not shown in detail in the branch member 27, locking members 27d extending to both sides of the upper portion are installed,
The locking member 27d is engaged and supported by the end portion (divided end portion) of the main body side tubular member 35b at the end portion of the opening 35c, and the forceps port base portion 12a is engaged and supported by the branch member 27. From connection pipe 2
8. Insert the forceps port piping tool 26, and insert the tip end of the forceps port piping tool 26 into the branching member 2
The forceps port connection portion 27a of 7 is screwed and connected and fixed. A base plate 39 is separately arranged in parallel with the chassis 36, and a bending operation mechanism for bending the bending portion of the insertion portion 3 is independently attached to the base plate 39.

On the other hand, in the connection structure of the cylindrical member 35 and the insertion portion 3, the distal side cylindrical member 35a is hollow with respect to the connection fitting 42 fixed to one end of the flexible portion 13 of the insertion portion 3. It is connected so that the rise can be adjusted. That is, the hollow member 41 fixed to the tip side tubular member 35a by the screw 43.
Is provided with a sliding member 44 that is restricted in rotation, and a male and female knurl that engages in the axial direction is formed between the sliding member 44 and the connection fitting 42, and the engagement results in a cylindrical shape. The members 35 and the connection fittings 42 are aligned with each other to stop rotation. Further, a fastening ring 45 for preventing the sliding member 44 from coming off is screwed into the connection fitting 42.

As shown in FIG. 2, a cover rubber 14 for protection is provided on the outer periphery of the connecting portion between the insertion portion 3 and the operating portion 2, and the cover rubber 14 is provided on the outer periphery of the tubular member 35. An insert metal fitting 15 that extends and is screwed is fixed, and a protective sleeve 16 is provided between the insert metal fitting 15 and the tip of the branch case 12.

A bracket 49 is attached to the chassis 36 in the grip case 11 as shown in FIG.
A sleeve 48 fixed to an end of a protective pipe 47, through which an operation wire extended from a curved portion of the insertion portion 3 is inserted, is engaged with and held by the bracket 49.

The operation of the above-described embodiment will be described below.
When the treatment tool 8 is inserted from the forceps mouth A opened in the forceps mouth rest portion 12a formed in the branch case 12 and the micromanipulation of the treatment tool 8 is performed, as shown in FIG. 8 is held by the operator's thumb and forefinger (may be further held by the middle finger), and another middle finger or ring finger, and if necessary, the little finger of the forceps opening base 12a in which the forceps opening A is formed. The operation is performed in this state by supporting the finger contact portion 22 formed on the inclined surface portion. By operating in this state, the operating finger is stabilized by the support by the finger contact portion 22, and the micromanipulation of the treatment instrument 8 can be easily performed. .

The finger contact portion 22 formed on the forceps mouth base portion 12a may be provided in the shape of a protrusion as well as the shape of a recess, or may be formed by combining irregular shapes to prevent slippage. Good. However, if the surface is roughened to prevent slippage, cleaning becomes difficult.

Specifically, in FIG. 4 to FIG.
22 shows modification examples of the shapes. First, the finger contact portion 22A shown in FIG. 4 is formed by forming ridges extending in the lateral direction above and below the inclined surface portion of the forceps opening base portion 12a. Figure 5
The finger contact portion 22B shown in (1) is provided by alternately forming recesses and protrusions extending in the lateral direction on the inclined surface portion of the forceps opening base 12a. In addition, the finger rest 22C shown in FIG.
Two ridges extending in the vertical direction are formed in the concave part formed on the slope of a.
It is formed and provided. Further, the finger contact portion 22D shown in FIG. 7 is provided with a large number of small projections provided in a concave portion formed in the inclined surface portion of the forceps opening base 12a.

[0026]

According to the endoscope of the present invention, since the finger contact portion is formed on the slope portion of the forceps opening base portion of the operation portion, other than the finger holding the treatment instrument inserted from the forceps opening of the operation portion. By touching and fixing the finger to the finger contact portion, it is possible to stably perform the minute fluctuation operation of the treatment tool.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an endoscope according to an embodiment of the present invention.

FIG. 2 is a sectional front view of a forceps opening portion of an endoscope.

FIG. 3 is a plan view showing a forceps opening portion of an endoscope by cutting out a part thereof.

4 to 7 are plan views of a main part similar to FIG. 3, showing respective modifications of the shape of the finger contact part.

[Explanation of symbols]

 1 Endoscope 2 Operation part 3 Insertion part 8 Treatment tool 10 Main body case 12 Branch part case 12a Forceps mouth base A Forceps mouth 22,22A-22D Finger rest part 29 Forceps tube

Claims (1)

[Claims] 1. An insertion portion to be inserted into a subject, and an operation portion for performing a bending operation of the insertion portion. The operation portion is formed with a forceps mouth base portion extending obliquely from a main body portion, In an endoscope for performing various treatments by inserting a treatment tool into a forceps tube through a forceps port formed in the center of the forceps port base and projecting from the distal end of the insertion part, a recess or a recess is formed in the slope of the forceps port base. Form a protrusion,
An endoscope characterized in that it is configured as a finger rest when operating a treatment instrument inserted from a forceps port.