JP2002034895A - Endoscope insertion section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inserting section of an endoscope capable of arranging various type built-in bodies in a most efficient state in a curved section or a flexible tube section and thereby thinning an outer diameter of the inserting section to reduce a pain to be given to a person suffering an examination of an endoscope. SOLUTION: Arranging positions of one or several built-in bodies of a plurality of built-in bodies 9, 10, 13 and 14 are displaced between a distal end body 5 and a curved section 3 or a flexible tube section 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an insertion portion of an endoscope.

[0002]

2. Description of the Related Art Generally, an endoscope has a bending portion which is bent by remote operation from a hand side connected to a distal end of a flexible tube portion, and a distal end main body in which an observation window or the like is disposed is attached to the distal end of the bending portion. Are linked.

[0003] Various built-in components such as optical fiber bundles and tubes each having a distal end attached to the distal end main body extend straight rearward from the rear end of the distal end main body, and extend from the inside of the curved portion to the flexible tube. It is inserted through the inside of the unit.

[0004]

However, in the above-described structure, the various built-in components are not arranged efficiently in the curved portion or the flexible tube portion, so that the outer diameter of the insertion portion becomes large. This has contributed to the increased pain given to those undergoing endoscopy.

Accordingly, the present invention enables the various internal components to be arranged in the most efficient state in the curved portion or the flexible tube portion, thereby reducing the outer diameter of the insertion portion and making it easier for a person who undergoes endoscopy. An object of the present invention is to provide an insertion portion of an endoscope that can reduce pain to be given.

[0006]

In order to achieve the above-mentioned object, the insertion portion of the endoscope according to the present invention has a bending portion, which is bent by remote operation from a hand side, connected to a distal end of a flexible tube portion,
The distal end main body connected to the distal end of the bending portion, the insertion portion of the endoscope in which the distal end of a plurality of internal components inserted and arranged from inside the bending portion to the inside of the flexible tube portion, The arrangement position of one or a plurality of built-in components is displaced between the distal end main body and the bending portion or between the flexible tube portion.

[0007] The position of one or more of the plurality of built-in components may be displaced between the rear end of the distal end body and the inside of the curved portion.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 4 shows the entire configuration of the endoscope. An operation unit 2 is connected to a base end of a flexible tube 1 constituting an insertion unit, and an operation unit 2 is attached to a distal end of the flexible tube 1. The bending part 3 which bends remotely by rotating the operation knob 4 arranged at the position is connected.

FIG. 5 is a front view of the distal end portion of the insertion portion.
An observation window 6, an illumination window 11, an air / water supply port 12, and a treatment instrument protrusion 10 a are arranged on the distal end surface of the distal end portion main body 5 connected to the distal end of the curved portion 3.

FIG. 6 is a side cross-sectional view of the distal end portion of the insertion section. The imaging surface of the solid-state imaging device 8 is arranged at the position where an object is imaged by the objective optical system 7 arranged inside the observation window 6. , An electronic circuit unit 8 ′ arranged behind the solid-state imaging device 8
A signal cable 9 extends rearward from.

A curved portion 3 is provided inside the treatment tool outlet 10a.
The distal end of the channel tube 10 is disposed from the inside thereof and is inserted through the entire length of the flexible tube portion 1. The channel tube 10 is formed of, for example, a tetrafluoroethylene resin tube.

A spiral groove is formed in the outer peripheral surface of the channel tube 10 at a portion located in the curved portion 3 so that flexibility is imparted, and a wire for reinforcing to prevent hip break is wound along the spiral groove. Have been. However, such a spiral groove may or may not be present in the present invention.

The bending portion 3 is composed of a plurality of (for example, about 5 to 15) node rings 31 rotatably connected by rivets 32, and the outer surface thereof is provided with an elastic outer cover 33 such as a rubber tube.
The rear part of the distal end main body 5 is fitted and fixed to the front part of the foremost node ring 31a by screws.

The distal end of a bending operation wire 34 to be pulled from the operation section 2 is inserted and fixed to a wire stopper 36 protruding from the inner peripheral surface of the foremost node ring 31a, and protrudes forward from it. A retaining ring 35 is fixed to the distal end of the bending operation wire 34.

A wire guide 37 for guiding through the bending operation wire 34 is attached to the inner peripheral surface of the node ring 31 so as to protrude inward at an appropriate interval.
In FIG. 6, illustration of various built-in components inserted and arranged in the bending portion 3 is omitted.

FIGS. 1, 2 and 3 show I-I in FIG.
I section, II-II section and III-III section are shown.
Reference numeral 3 denotes a light guide fiber bundle having an emission end face arranged inside the illumination window 11, and reference numeral 14 denotes a flexible air / water supply tube connected to the air / water supply port 12.

The aforementioned signal cable 9, channel tube 10 and light guide fiber bundle 13,
The air / water supply tube 14 is a built-in member whose distal end portion is fixed to the distal end main body 5 and is inserted through the entire length of the flexible tube portion 1 from the inside of the bending portion 3 to the inside of the operation portion 2.

As shown in FIG. 2, the solid-state imaging device 8 and the electronic circuit section 8 'need to be arranged vertically in the tip main body 5 in order to match the orientation of the observation screen with the vertical direction. There is.

By arranging the channel tube 10 which occupies the next largest space next to the electronic circuit portion 8 'at the diameter position of the distal end main body 5 side by side with the electronic circuit portion 8', the outer diameter of the insertion portion of this portion is reduced. Can be the smallest. The light guide fiber bundle 13 and the air / water supply tube 14 provided two by two are respectively arranged one by one on the left and right.

As shown in FIG. 1, a state-of-the-art node ring 31 is provided.
At a position near the rear end of a, a wire stopper 36 is provided to protrude inward at a diameter position in the vertical direction in order to fix the distal end of the bending operation wire 34.

Therefore, by displacing the channel tube 10 slightly left and right from the diameter line in the vertical direction so as not to interfere with the wire stopper 36, the outer diameter of the insertion portion at this portion can be minimized.

Although the signal cable 9 is considerably thinner than the electronic circuit section 8 ', the signal cable 9 is moved in the left-right direction (however, the channel tube 1) to avoid interference with the wire stopper 36.
0) and the signal cable 9
Is displaced inwardly.

As described above, the built-in members 10 and 9 that interfere with the wire stopper 36 are displaced inside the node ring 31a at the forefront (that is, between the rear end of the distal end body 5 and the inside of the curved portion 3). This arrangement minimizes the outer diameter of the insertion section at that point, minimizing the pain experienced by the person undergoing the endoscopy.

Further, as shown in FIG. 3, in the curved portion 3, since four wire guides 37 are provided inwardly at four positions, that is, up, down, left and right, each of the built-in parts 9, 10, 1 is provided.
The outer diameter of the curved portion 3 is minimized by appropriately displacing one or more of the built-in components 3 and 14 to a position that does not interfere with the wire guide 37, so that a person who undergoes an endoscopy can receive it. Pain can be minimized.

Usually, since no projection or the like is provided in the flexible tube portion 1, various internal components may be arranged in the flexible tube portion 1 in the same arrangement state as the rear end portion of the curved portion 3. However, when a projection or the like that interferes with the built-in components 9, 10, 13, 14 is provided in the flexible tube portion 1, the arrangement position of one or a plurality of built-in components can be The outer diameter of the flexible tube 1 may be minimized by appropriately displacing.

[0026]

According to the present invention, the arrangement position of one or more of the plurality of built-in objects is displaced between the distal end body and the curved portion or between the flexible tube portion. Thereby, various built-in components can be arranged in the most efficient state in the bending portion or the flexible tube portion, thereby reducing the outer diameter of the insertion portion and reducing the pain given to the person who undergoes the endoscopy. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line II of FIG. 6 of an insertion portion of an endoscope according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 6 of an insertion portion of the endoscope according to the embodiment of the present invention.

FIG. 3 is a sectional view of the insertion portion of the endoscope according to the embodiment of the present invention, taken along line III-III in FIG. 6;

FIG. 4 is an external view showing the entire configuration of the endoscope according to the embodiment of the present invention.

FIG. 5 is a front view of a distal end portion of the insertion section of the endoscope according to the embodiment of the present invention.

FIG. 6 is a side sectional view of a distal end portion of an insertion portion of the endoscope according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible tube part 3 Bending part 5 Tip part main body 9 Signal cable (built-in) 10 Channel tube (built-in) 13 Light guide fiber bundle (built-in) 14 Air / water tube (built-in) 31 Section ring 31a Nodal ring 36 Wire stopper 37 Wire guide

Claims (2)

[Claims] 1. A bending portion which is bent by remote operation from a hand side is connected to a distal end of a flexible tube portion, and a distal end body connected to a distal end of the bending portion is connected to the flexible tube portion from the inside of the bending portion. In the insertion portion of the endoscope to which the distal ends of the plurality of built-in objects inserted through are attached, the arrangement position of one or more built-in objects among the plurality of built-in objects is determined by changing the position of the distal end main body and the curved portion. An insertion portion of an endoscope, wherein the insertion portion is displaced between the endoscope and the flexible tube. 2. An arrangement position of one or more of the plurality of built-in components is displaced between a rear end portion of the tip main body and the inside of the curved portion. Endoscope insertion section.