JPS5993414A - Guiding device of endoscope treating tool - Google Patents

Abstract

PURPOSE:To reduce the external diameter of the insertion part of a projecting treating tool and relieve patient's pain, and to guide the tip of the tool to the center of a visual field easily and speed up and facilitate treatment, by providing a guide element with an energizing means which guides the tip from a storage chamber toward the center of the visual field. CONSTITUTION:The guide element 24 which guides the front end of the treating tool 18 in a projection direction is stored in the storage chamber 23 at the exit 23 of a channel 19; and the base is supported pivotally in the recessed part of the chamber 23 and the reverse surface of the tip side is pressed in engagement with a coil spring 25 as the energizing method. The tip side of the guide element 24 is energized by the spring 25 to shield part of the passage in the chamber 23 in front of the exit 22. The guide element 24 abuts on the flexible sheath part 18C of the treating tool 18 projected from the insertion part almost axially to displace the sheath part. Therefore, the treating tool 18 is only projected to guide the tip cap part 18A of the treating tool 18 to the center of the visual field, facilitating treatment such as bioassay.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guiding device for an endoscopic treatment instrument having a simple structure in which the guiding element is formed using an elastic member or the like.

In recent years, by inserting an elongated insertion part into a body cavity, organs inside the body cavity can be observed, and if necessary, in-vivo tissues can be collected using a 98-piece shell such as forceps inserted through a channel for treatment shells. Medical endoscopes, which can be used to diagnose affected areas in detail, are widely used. Also, in the industrial field, boilers.

Internal mirrors are used for maintenance purposes, such as observing the condition inside pipes of chemical plants, etc., and collecting and inspecting deposits on the inner surfaces of pipes.

Within the above? ! There are two types of mirrors: flexible endoscopes, which have flexible insertion sections that can be bent, and rigid endoscopes, which have rigid insertion sections that are approximately linear.

These endoscopes include an illumination optical system that transmits illumination light supplied to the proximal side when the insertion section is inserted and emits the illumination light from the distal end of the insertion section to the object side, and the illumination optical system. An observation optical system is provided that can form an image of the object illuminated by the camera and observe it from behind the eyepiece on the hand side.

Traditionally, there are side-viewing endoscopes in which the side-viewing direction is the observation field of view, and strabismus-type endoscopes in which the oblique direction is the observation field of view. In IA&i, when performing treatment using treatment instruments,
As disclosed in Japanese Patent No. 4-17519, a treatment instrument guide is used to guide the treatment instrument to the vicinity of the center of the observation field where treatment can be easily performed. The inductor is controlled remotely by mechanical means such as moving a wire or the like passed through the distal end of the insertion section up to the inductor back and forth in the hand operation section of the endoscope.

Therefore, a mechanism for moving the wire forward and backward is inserted into the operation section, a wire and a guide tube for the wire are inserted into the insertion section, and the inserted wire is guided to the entire wall of the inductor housing on the distal end side of the insertion section.
It is connected to an inductor housed inside.

In the conventional treatment instrument guide device having such a structure, many members are used in the operating section and the guide storage chamber formed on the distal end side of the insertion section. The manufacturing cost of 1~ increases. In addition, dirt may enter through the wire insertion port, making it impossible to prepare the inductor in a uniform manner, and the outer diameter of the endoscope insertion section may become thicker due to the wire and wire guide tube. It had drawbacks such as causing great pain to patients.

The present invention has been made in view of the above-mentioned points, and therefore, the present invention is formed near the outlet 1 of the treatment instrument channel! : Forming a means for biasing the inductor in the inductor storage chamber, and having a 4M structure that abuts on the inductor and guides the treatment instrument projecting upward from the channel outlet toward the center of the observation field of view. This makes it possible to guide a treatment instrument with a simple structure C without using a wire to control the guide, and also enables endoscopic treatment that reduces the pain caused to the patient by reducing the outer diameter of the insertion section. The purpose of the present invention is to provide a guidance device for iJ# implements.

Hereinafter, the present invention will be specifically explained with reference to the drawings. 1st
4 to 4 relate to a first embodiment of the present invention, FIG. 1 shows a perspective type flexible endoscope to which the first embodiment is applied, with forceps inserted through it, and FIG. 2 shows a state in which forceps are inserted. FIG. 3 shows an enlarged view of the distal end side of the insertion portion shown in FIG.
In contrast to the embodiment, FIG. 4 shows a state in which the tip of the 811 element is in contact with the inductor, and FIG. 4 shows a state in which the forceps are further projected forward from the treatment instrument channel.

In these figures, a soft endoscope 1 equipped with the first embodiment has an elongated and flexible insertion section 2 and a large diameter angle operation knob 3 provided on the rear end side of the insertion section 2. The operating section 4, the eyepiece section 5 provided at the rear end of the operating section 4, and the flexible light guide cooler extending outward from the side of the operating section 4 It consists of pull 6.

By attaching a connector (not shown) attached to the tip of the light guide cable 6 of the flexible endoscope 1 to the light source device, illumination light 5- is supplied from the light source treatment instrument side, and the illumination light is transmitted to the light guide 'r- ',, f ((and covered with a flexible mantle cove 7 Jq, l:
: Inserted into 1m entrance part 2 (formed by fiber bundle ↑
1. LL)', / Lighting windows 10, 10 formed on the front end surface 9 of the distal end component 8 of the insertion section 2 with the light guide attached.
The configuration is such that the light is emitted from h+ to the external object side.

The illumination light emitted from the illumination window 10.10 is reflected by the object, and a part of the reflected light enters the observation window 11 formed between the illumination windows 10.10 on the front end surface 9 of the tip component 8. The incident light is focused on the front end of the image guide 13 by the objective lens system 12 disposed inside the observation window 11, and is transmitted to the rear end surface side by the image folds and zigite, so that He can be seen from the rear of the eyepiece 5. It's becoming.

The front end surface 9 of the distal end component 8, in which the illumination window 10.10 and the observation window 11 are formed, is inclined at an angle of θ degrees (see FIG. 2) with respect to the (straight) axial direction of the insertion section 2. The observation window 11 is formed in a perspective type in which the (observation) viewing direction is a direction inclined at an angle of θ degrees with respect to the axial direction, that is, a direction perpendicular to the end surface of the observation window 11. Therefore, the light guide (not shown) inserted into the insertion section 2 from the operation section 4 side has its front end curved, and the illumination light passes from each end face through the illumination windows 10 and 10 in the viewing direction. It is designed to be emitted.

Further, inside the cover glass 14 that closes the IW observation window 11, a prism 15 that changes the traveling direction of light is disposed on the way to the objective lens system 12.

- A curved part 16 having a structure that can be curved vertically, horizontally, etc. is formed in the rear part adjacent to the tip structure part 8, and the angle operating knob 3 provided on the side of the operating part 4 on the hand side can be rotated. The bending portion 16 is configured to be able to bend by pulling and relaxing a bending operation wire (not shown).

The upper diagonal view type flexible endoscope 1 has a procedure that allows a treatment instrument such as a forceps 18 to be inserted into the operation section 4 and the insertion section 3 through a treatment instrument insertion port (forceps port) 17 formed in the operation section 4. A tooling channel 19 is formed inside the soft dupe 20. The front end side of this flexible tube 20 is fixed to the distal end component 8 and to the outer periphery of the rear end of a base 21 which is fixed to the inner wall of a through hole formed with a slight inclination in the oblique direction from the axial direction of the insertion section 2 (the front end side). The front end (tip) of the through hole becomes the channel outlet 22, and the tip component 8 in front of the channel outlet 22 is connected to the observation window 11! An inductor storage chamber 23 is formed by forming a concave portion which is in contact with and has a wide opening.

(Inductor) storage chamber 2 adjacent to the channel outlet 22
3 accommodates an inductor 24 that controls (guides) the protruding direction of the front end of the treatment instrument protruding from the channel outlet 22, and the base of the inductor 24 is located in the storage chamber 23 adjacent to the channel outlet 23. One end of a coil spring 25 serving as a means for biasing the inductor 24 is mounted on the back surface (the surface close to the objective lens system 12 side) located on the tip side of the inductor 24. The other end of the spring 25 is fixed to the inner wall of the storage chamber 23 facing the back surface.

The elastic force of the spring 25 normally causes the inductor 24 to move through the passage in the storage chamber 23 with the channel exit 122 extending forward (in a direction from the axial direction of the insertion section 2 to the perspective direction). ) - It is energized so that the capital is connected. That is, the biasing means is formed so as to come into contact with the treatment tool inserted in the substantially axial direction of the insertion portion 2 and guide the protruding distal end side toward the viewing direction by the biasing force of the spring 25.

Note that the tip side surface of the inductor 24 (which protrudes continuously in front of the channel outlet 22) is connected to the inserted forceps 18.
For example, it has an arc shape so that smooth contact can be maintained.

The operation of the first embodiment of the present invention configured in this manner will be described below.

The insertion section 2 of the flexible endoscope 1 is inserted into a body cavity, and the forceps 18 having a cup section 18A at the tip are inserted into the channel 19 from the forceps opening 17 for, for example, biopsy, and the tip of the forceps 18 is inserted into the channel 19. When the tip cup portion 18A is projected toward the storage chamber 23 through the outlet 22, the tip cup portion 18A comes into contact with the tip side surface of the inductor 24. Then, since the cup portion 18A and the distal end portion 18B on the proximal side of the cup portion 18 are hard, the forceps 18 is pressed against the biasing horn of the spring 25 (, jφ) as shown in FIG. Contract the spring 25 and move the inductor 24 to arrow R] A 7
Evacuate as shown.

When the forceps 18 are further protruded forward, the inductor 24
The part that comes into contact with the inductor 24 and the inductor 24 and the inductor 24 and the inductor 24 and the inductor 24 and the inductor The sheath portion 18C that contacts the child 24 returns to the direction in which the spring 25 extends, using the pivot portion of the inductor 24 as a fulcrum, and the forceps 1
By raising the distal end side of the forceps 8 in the oblique direction from (close to) the axis of the insertion section 2, the cup portion 18A at the distal end of the forceps 18 can be guided to approximately the center of the Wl observation field.

Therefore, according to the first embodiment, by simply inserting the treatment instrument such as the forceps 18 through the forceps port 17, the channel 19
Since the distal end side of the treatment instrument such as the forceps 18 protruding from the can be guided to the center of the visual field, treatments such as a biopsy can be easily performed.

Further, unlike the conventional example, since a wire for operating the inductor is not required, the outer diameter of the insertion portion 2 can be made thinner, and the pain caused to the patient can be reduced. Also, insertion part 2
Also, since the structure of the operating section 4 can be simplified, manufacturing costs can be reduced.

FIG. 5 shows a second embodiment of the present invention (the main parts and their surroundings are shown in a simplified manner. The same applies to FIG. 6 and subsequent figures).

).

As shown in the figure, in the second embodiment, an elastic rubber 31 is used as the biasing means in place of the spring 25 of the first embodiment. Therefore, for example, a small diameter constriction is formed in a portion close to each end of the rubber 31, and the constriction of the rubber 31 is formed on the back surface of the tip side of the inductor 24 and the inner wall of the storage chamber 23 opposite to the back surface. The formed ends are respectively fitted and housed so that the tip side of the inductor 24 is always biased in a direction to partially block the front of the channel outlet 22,
When the treatment instrument is inserted, a biasing means is formed that guides the distal end side of the instrument constituted by the storage chamber 23 toward the viewing direction.

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

FIG. 6 shows a third embodiment of the present invention using a plate-shaped member that also functions as an inductor. Forming a groove or the like for accommodating the base part on the inner wall of the storage chamber 23 whose end is formed in the tip component part 8, and press-fitting or press-fitting (fixing by spring brazing or the like);
The tip side is always urged by the elasticity of the inductor 32 so that it protrudes in front of the channel I and the outlet 22. A biasing means is formed to guide the inserted treatment tool in the visual field direction.

This third embodiment is a simpler ml than the first and second embodiments.
It is almost the same as the embodiment. Even if you use rubber parts, you can make them in different shapes! A fourth practical example of the present invention constructed by Lepoi et al. is shown below.

As shown in the figure, recesses are formed on the back side of the inductor 24 and on the inner wall surface of the storage chamber 23 facing the back side, respectively.
Permanent 1i stones 33 and 34 are fitted into each of these recesses in close proximity to each other so that the opposing surfaces are of the same polarity such as S, S poles or N, N poles.

The inductor 24 is urged in a direction to close the front of the channel outlet 22 by the repulsive force of the magnets 33 and 34 which are opposite to each other and have the same polarity.

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

Although each of the embodiments described above uses a single biasing means, a plurality of biasing means may be used. Moreover, the number of inductors to be energized can also be plural.

Although each of the above-mentioned embodiments is applied to a perspective-viewing flexible endoscope, the present invention can be applied to a side-viewing flexible endoscope by, for example, increasing the biasing force or using a plurality of inductors. It can also be applied to flexible endoscopes.

Further, the present invention is not limited to flexible endoscopes, but can be similarly applied to rigid endoscopes.

As described above, according to the present invention, the 13- tip side of the treatment instrument protruding from the storage chamber is guided toward the center of the field of view by the inductor stored in the storage chamber (since j + force f ~ is formed) , it is necessary to insert the operation wire X7 and form the operation 1ff#l as in the conventional example, and the manufacturing cost can be reduced.

Furthermore, the outer diameter of the insertion portion can be made thinner, reducing the pain experienced by the patient, and the insertion portion can also be inserted into narrower insertion points. or,
Unlike the conventional example, it is not necessary to operate the treatment instrument at hand, and by simply inserting the treatment instrument, the distal end thereof can be guided to the center of the visual field, so that the treatment can be performed easily and quickly.

[Brief explanation of the drawing]

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure is a perspective view showing a flexible endoscope to which the first embodiment is applied;
FIG. 2 is a cross-sectional view showing the distal end side of the insertion section of FIG. 1 in which the first embodiment is formed. @Figure 3 is a sectional view showing the tip side of the insertion section with the forceps inserted until the front end contacts the inductor, and Figure 4 is a cross-sectional view showing the insertion section with the forceps inserted until the front end protrudes forward from the storage chamber. A sectional view showing the tip side of the part,
FIG. 5 is a schematic explanatory diagram showing the second embodiment of the present invention;
- Fig. 6 is a schematic explanatory diagram showing a third embodiment of the present invention, and Fig. 7 is a schematic explanatory diagram showing a fourth embodiment of the present invention. 1... Soft inside 71! M 3...Insertion part 8.
...Tip component 11...Observation window 19...Channel 22...Channel exit 23...Storage chamber 24.3
2... Inductor 25... Spring 31... Rubber 33.34
...Magnet 15- Figure 1

Claims (1)

[Scope of Claims] (1) An endoscope in which an inductor for guiding the protruding direction of the distal end of the treatment instrument is housed in a storage chamber formed near the pressure port on the distal side of the channel through which the treatment instrument can be inserted, A guiding device for an endoscopic treatment instrument, characterized in that a biasing means for biasing the guide in the storage chamber in the direction of the observation visual field is formed. (2) The guiding device for an endoscopic treatment instrument according to claim 1, wherein the biasing means is configured to bias the inductor using a coil spring or a leaf spring. (3) The guiding device for an endoscopic treatment instrument according to claim 1, wherein the biasing means is configured to bias the guide element using an elastic rubber member. (4) Guidance technique Vl for an endoscopic treatment instrument according to claim gg1, wherein the biasing means is configured to bias the inductor using a magnet. 1. The endoscope (Illifr shell guiding device) according to claim 1, wherein the inductor is an elastic member (1) that the biasing means is formed by forming the inductor.