JP3275927B2 - Endoscope - Google Patents

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 base in an endoscope having an insertion section and an operation 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 in an operation portion of the endoscope. Various treatment tools such as a ration tube are inserted, the distal end 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 viewing a photographed image.

[0003]

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

That is, the position and the direction of the tip of the insertion section of the endoscope are adjusted by operating a bending operation knob or the like of the operation section, and the treatment tool inserted from the forceps port extends from the opening at the tip of the insertion section. The distal end of the treatment tool is inserted into a predetermined part of the subject or cut off while monitoring the photographed image, and the operation of monitoring the two-dimensional image requires skill and the treatment tool When the micro-movement is performed, the root portion of the treatment tool protruding outward from the forceps port is held with a fingertip and operated in the axial direction.
In a state where the hands and arms are floating in the air without being supported, it is difficult to perform stable minute movement.

In view of the above circumstances, it is an object of the present invention to provide an endoscope that allows a micro-change operation of a treatment tool inserted from a forceps port to be easily performed.

[0006]

An endoscope according to the present invention for achieving the above object has an insertion portion inserted into a subject, and an operation portion for performing a bending operation and the like of the insertion portion. The operation section has a forceps base portion extending obliquely from the main body portion, and inserts a treatment tool into a forceps tube from a forceps port formed at the center of the forceps base portion and projects the treatment tool from the distal end of the insertion portion. For performing the treatment, a concave portion or a protrusion is formed on the slope of the forceps port base, and is configured as a finger pad when operating a treatment tool inserted from the forceps port.

[0007]

According to the above arrangement, when performing a minute change operation of the treatment tool inserted from the forceps port of the operation section, the treatment tool is held by the operation finger such as the thumb and the index finger, and the other middle finger or the ring finger or By performing the operation with the little finger held against the finger rest formed on the slope of the forceps base in which the forceps mouth is formed, the operation finger is less displaced due to this fixation, and the treatment instrument is minute. 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 operation unit 2 that is gripped by an operator to perform various operations, and an insertion unit 3 (a distal end portion is not shown) on the distal end side to be inserted into a subject. The operation unit 2 includes a main body case 10 at a base end, a gripping case 11 and a branch case 12 which are sequentially connected to the main body case 10.

On the other hand, although not shown, the insertion portion 3 has a curved portion that can be bent and deformed in an arbitrary direction, and a distal end observation portion is provided at a distal end side of the curved portion. An optical system such as a sensor and an imaging objective lens and other various members are installed. Further, a forceps tube for guiding a treatment tool 8 such as a forceps or a cannulation tube, an air supply / water supply tube for supplying air or water, or the like is inserted into the insertion opening 3 at the distal end opening, and a proximal end side of the curved portion. Is connected to a flexible portion 13 having flexibility. The operation portion 2 is provided on the proximal end side of the flexible portion 13 for performing various operations such as photographing and bending operations.
Are connected.

The main body case 10 of the operation section 2 has therein a bending operation mechanism (not shown) therein, and is provided with up and down and left and right operation knobs for operating the bending operation mechanism on the opposite side of the figure. , 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 a lighting light source (not shown) and a connecting flexible portion 20 for leading out cords are connected.

The gripping case 11 becomes thinner and circular in order from the connection with the main body case 10 and is connected to the branch case 12. In the grip case 11, a connection mechanism for connecting the operation wire from the bending portion to the bending operation mechanism, a stopper mechanism for controlling the amount of bending, and the like are provided.

The branch case 12 is provided on its outer surface with a forceps base 12a projecting obliquely laterally.
At the center of 12a, a forceps port A for inserting a treatment instrument 8 such as a forceps is opened.

The forceps base 12a of the branch case 12 is
As shown in FIG. 2, it is formed so as to protrude obliquely from the pipe-shaped main body portion of the branch portion case 12 in a cylindrical shape, and is connected to a forceps port piping device 26 (base) inside the forceps base section 12a. A tube 28 is mounted, and a forceps port A for inserting a treatment tool 8 such as a forceps or a cannulation tube is formed in a central portion thereof. On the front slope of the forceps base 12a, a finger contact portion 22 having a concave shape is formed as shown in FIG. In the vicinity of the forceps base 12a, auxiliary water supply piping tools 24 and 25 are provided.

A branch member 27 is provided at the forceps port branch portion 5 in the branch portion case 12 so as to be connected to the inner end of the connection tube 28 mounted on the forceps port base portion 12a. . This branch member 27 is a three-pronged, forceps port connecting portion
a is connected to the inner end of the connecting tube 28 by screwing, and a tube connecting portion 27b on the distal end side is connected to a forceps tube 29 extending to the distal end of the insertion portion 3 by a clamp 31 and branches off 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
Extends into the main body case 10 and is connected to the suction valve 18.

The treatment tool 8 inserted from the forceps port A passes through the inside of the forceps port plumbing tool 26 and the connection pipe 28, passes through the branching member 27, passes through the forceps tube 29, and passes through the insertion section 3. It is guided to the tip side and extends from the tip opening.

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

An opening 35c is formed in a portion of the cylindrical member 35 corresponding to the forceps base 12a, and the lower end of the connection tube 28 is inserted therethrough and connected to the branch member 27 installed therein. . The cylindrical member 35 is divided into a distal cylindrical member 35a and a main cylindrical member 35b at a dividing portion D. The distal-side tubular member 35a and the main-body-side tubular member 35b are fitted to each other at their divided ends, and are connected and fixed by tightening screws 38 from the outside. The main body side tubular member 35b includes:
The connecting portions 24a, 25a of the pipe fittings 24, 25 of the sub water supply system with the inner tubes 32, 32 are fixed, and the outer cap portions 24b, 25b pass through the branch case 12 at the connecting portions 24a, 25a. Are connected.

Although not shown in detail, the branch member 27 is provided with a locking member 27d extending to both upper sides.
The locking member 27d is engaged and supported by the end of the opening 35c at the distal end (divided end) of the main body side cylindrical member 35b, and the forceps base 12a is engaged with the branch member 27 in the engaged and supported state. Connection pipe 2 from
8.Put the forceps port plumbing tool 26 and cut the tip
It is screwed and connected and fixed to the forceps port connection portion 27a of No. 7. A ground plate 39 is separately provided in parallel with the chassis 36, and a bending operation mechanism for bending the bending portion of the insertion section 3 is independently attached to the ground plate 39.

On the other hand, the connection structure between the tubular member 35 and the insertion portion 3 is such that the distal end side tubular member 35a is connected to the hollow member 41 with respect to the connection fitting 42 fixed to one end of the flexible portion 13 of the insertion portion 3. Are connected so as to be able to adjust the rise. That is, the hollow member 41 fixed to the distal end side cylindrical member 35a by the screw 43
A sliding member 44 is provided which is engaged with the sliding member 44 to regulate the rotation. A male and female knurl is formed between the sliding member 44 and the connection fitting 42 so as to engage in the axial direction. The rotation of the member 35 is stopped by performing phase matching between the member 35 and the connection fitting 42. Further, a fastening ring 45 for preventing the sliding member 44 from coming off is screwed to the connection fitting 42.

As shown in FIG. 2, a protective cover rubber 14 is provided on the outer periphery of the connecting portion between the insertion section 3 and the operation section 2. An insert fitting 15 that is extended and screwed is fixed, and a protective sleeve 16 is disposed between the insert fitting 15 and the tip of the branch case 12.

As shown in FIG. 3, a bracket 49 is attached to the chassis 36 in the grip case 11.
A sleeve 48 fixed to the end of the protection pipe 47 through which an operation wire extending from the curved portion of the insertion section 3 is inserted is held by the bracket 49.

The operation of the above embodiment will be described.
When the treatment tool 8 is inserted from the forceps opening A opened in the forceps base 12a formed in the branch case 12 of the above, and when the treatment tool 8 is minutely operated, as shown in FIG. 8 is held by the operator's thumb and index finger (and may be held by the middle finger), and the other middle finger or ring finger and, if necessary, the little finger are inserted into the forceps base 12a where the forceps port A is formed. The finger rest 22 is formed on the slope and is supported by the finger rest 22. By operating in this state, the operation finger is stabilized by the support by the finger rest 22 and the minute operation of the treatment instrument 8 can be easily performed. .

The finger rest 22 formed on the forceps base 12a may be provided in a projecting shape in addition to a recessed shape, or may be formed by combining uneven shapes to prevent slipping. Good. However, if the surface is roughened to prevent slippage, cleaning becomes difficult.

More specifically, FIG. 4 to FIG.
22 each show a variation of the shape. First, the finger contact portion 22A shown in FIG. 4 is provided by forming ridges extending in the horizontal direction above and below a slope portion of the forceps base portion 12a. FIG.
The finger contact portion 22B shown in FIG. 1 is formed by forming a concave portion extending in the lateral direction and a ridge alternately on the slope portion of the forceps base portion 12a. Further, the finger rest 22C shown in FIG.
Insert a vertically extending ridge into the recess formed on the slope of
This is formed and provided. Further, the finger contact portion 22D shown in FIG. 7 is provided with a number of small projections arranged in a concave portion formed on the slope of the forceps base 12a.

[0026]

According to the endoscope of the present invention, since the finger rest is formed on the slope of the forceps base of the operation unit, the endoscope other than the finger holding the treatment tool inserted from the forceps opening of the operation unit is provided. The finger can be stably applied to the above-mentioned finger contact portion to stably perform the minute change operation of the treatment tool.

[Brief description of the 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 the endoscope.

FIG. 3 is a plan view showing a portion of a forceps opening of the endoscope partially cut away;

FIGS. 4 to 7 are plan views of essential parts similar to FIG. 3, showing modified examples of the shape of the finger rest.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endoscope 2 Operation part 3 Insertion part 8 Treatment tool 10 Main body case 12 Branch part case 12a Forceps base A Forceps port 22,22A-22D Finger contact part 29 Forceps tube

Claims (1)

(57) [Claims] An insertion portion inserted into the subject; and an operation portion for performing a bending operation and the like of the insertion portion, wherein the operation portion has a forceps base extending obliquely from a main body portion. In an endoscope for performing various treatments by inserting a treatment tool into a forceps tube from a forceps port formed at the center of a forceps base and protruding from a distal end of an insertion portion, a concave portion or a slanted portion of the forceps base is provided. Form a protrusion,
An endoscope comprising a finger pad for operating a treatment tool inserted from a forceps port.