JPS6299716A - Endoscope - Google Patents

Abstract

PURPOSE:To make a contained unit hard to break at the position of taking out the contained unit, and to make connection to a covering tube surely by passing a contained unit inserted into at least one inner hole of a multilumen tube through an elastic coil simultaneously with the end part of the multilumen tube to protect the contained unit. CONSTITUTION:When using an endoscope 1, an inserted part 3 bends in a body, and accordingly, image guide fiber 9 moves back and forth in axial direction in the inner hole 8, and the part of image guide fiber 9 led out from the end face of a multilumen tube 7 also moves. As a covering tube 11 is held by the coil part 13c of an elastic coil 13, and exposed part 14 of the image guide fiber 9 is inserted loosely into a coil part 13b abrupt change of flexibility of led out part of the image guide fiber is suppressed. Hardness changes stepwise, and breakage of the image guide fiber 9 is prevented. The elastic coil 13 is effective in prevention of abrupt breakage of the image guide fiber 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope that uses a so-called multi-lumen tube in its insertion section.

[Conventional technology]

It is known that the insertion portion of an endoscope is constructed using a so-called multi-lumen tube having a plurality of lumens (see Japanese Utility Model Publication No. 60-24323). and,
Each lumen of this multi-lumen channel is used for guiding a light guide and an image guide, and as a channel for inserting a treatment instrument, a water supply channel, and the like.

The method of guiding the image guide, light guide, etc. built into the inner cavity of the multi-lumen tube to the outside is to press fit or glue a metal pipe from the end of the multi-lumen tube, and pass the built-in contents into the pipe. The tube was covered from the end of the nob to protect the internal contents while being taken out.

[Problem that the invention seeks to solve]

The above derivation structure is complex. Moreover, during assembly, built-in components such as light guides and image guides that are led out from the end of the pipe fixed to the end of the multi-lumen tube are easily damaged because their flexibility varies greatly between the inside and outside of the pipe. Further, when a pipe is press-fitted into a multi-lumen tube, the end of the multi-lumen tube is distorted, which causes the shape of the inner cavity to change.

The present invention has been made in view of the above-mentioned problems, and its purpose is to break the built-in objects such as the image guide and light guide at the point where they are taken out from the multi-lumen tube that constitutes the insertion section. It is an object of the present invention to provide an endoscope that can be easily connected to a covering tube and that can be connected reliably to a covering tube.

[Means and effects for solving the problem] A built-in object inserted into at least one lumen of a multi-lumen tube was covered with an elastic coil at the same time as the end of the multi-lumen tube to protect the built-in object.

〔Example〕

1 to 3 show a first embodiment of the present invention.

FIG. 2 shows an endoscope 1 for blood vessels. This endoscope I consists of an operating section 2 and an insertion section 3, and the operating section 2 is provided with an eyepiece section 4 and a treatment instrument insertion opening section 5. Furthermore, a distal end component 6 is attached to the distal end of the insertion section 3.

The insertion section 3 is composed of a multi-lumen tube 7 integrally molded from a flexible resin such as polyurethane or polyethylene. This multi-lumen tube 7
has a plurality of internal cavities 8 passing through it along its longitudinal axis.
・is formed. The image guide fiber 9 and other built-in objects are inserted into the inner cavities 8, respectively, and the inner cavities 8 are used as a channel for inserting a treatment instrument, a water supply channel, and the like.

Further, the proximal end portion of the multi-lumen tube 70 is roughly disposed within the operating section 2 at section A in FIG. 2, as shown in FIG. That is, internal components such as the image guide fiber 9 are guided from the end face of the multi-lumen tube 7 into the protruding operation section 2 . Further, a covering tube 11 is fitted around the outer periphery of the portion of the image guide fiber 9 led out from the end face of the multi-lumen tube 7 except for the vicinity of the end face of the multi-lumen tube 7 . Note that this image guide fiber 9 is connected to the operating section 2.
It is optically connected to the eyepiece section 4 of.

Furthermore, the outer periphery 1 of the proximal end of the multi-lumen tube 7
2 and the outer periphery of the lead-out portion of the image guide fiber 9, one elastic coil I3 is wound around both. The coil portion ZJ& wound around the outer periphery I2 of the base end has an inner diameter that is the same as the outer diameter of the multi-lumen tube 7, and is closely fixed to the outer periphery of the base end. Also, the exposed portion 14 of the image guide fiber 9
The coil portion 13b is wound loosely around the outer periphery of the portion 14 without wobbling. Further, the coil portion 13c to be wound around the covering tube IIK has an inner diameter that is the same as the outer diameter of the covering tube 11, and is tightly fixed. Moreover, the above-mentioned coil portion Z J b.

The center of 130 is the lumen 8 through which the image guide fiber 9 passes.
coincides with the center of

The image guide fiber 9 as a built-in component is loosely inserted into the inner cavity 8 and the covering tube II, and is movable in the longitudinal direction thereof.

When the inner YA boundary 1 is used, the insertion portion 3 is curved inside the patient's body, so the image guide fiber 9 moves back and forth in the axial direction within the inner cavity 8. Then, the portion of the image guide fiber 9 led out from the end face of the multi-lumen tube 7 also moves. By the way, the covering tube 11 is held by the coil portion 13C of the elastic coil 13, and the coil portion Z, ? Since the exposed portion 14 of the image guide fiber 9 is loosely inserted in l), the flexibility of the lead-out portion of the image guide fiber 9 is
The hardness of LA changes gradually,
This prevents the image guide fiber 9 from breaking. In other words,
The elastic coil I3 has a bending effect that prevents the image guide fiber 9 from being suddenly bent.

Furthermore, since the elastic coil 13 can be tightly wound, there is little risk of the covered tube 11 being caught between the wires.

Note that the elastic coil 13 is connected to the image guide fiber 9.
However, it can also be used for other built-in items such as light guide fibers.

Further, in the above embodiment, the elastic coil 13 may be wound around the image guide fiber 9 continuously up to the eyepiece section 4. Moreover, even if only the elastic coil 13 is wound without using the covering tube 11 and the coil portion is extended to the eyepiece 4, the elasticity of the multi-lumen tube 7 and the covering tube 11 in the first embodiment is The coil 13 was fixed by pressing it against each surface and winding it, but as shown in FIG. The end portion I3J of 13 may be inserted and fixed. Further, the elastic knot 13 may be fixed with adhesive.

FIG. 5 shows a second embodiment of the invention. In this embodiment, the covering tube 11 that covers the built-in image guide fiber 9 may be fitted and fixed onto the outer periphery of the coil portion 13b of the elastic coil 13 into which the image guide fiber 9 is loosely inserted. In other words, it is sufficient that there is at least a portion where the image guide fiber 9 and the elastic coil 13 overlap.

FIG. 6 shows a third embodiment of the invention. In this embodiment, an elastic coil 13 is wound around a plurality of internal components, such as an image guide fiber 9 and a light guide fiber 15. That is, while wrapping and fixing the one end side coil portion 13a of the elastic coil Z3 around the base end outer circumference 12 of the multi-lumen tube 7,
The other end is wound around both the fibers 9 and 15 so as to be alternately knitted.

In this way, each of the tubes 11 can be covered with one elastic coil 13 . Further, the distance between the lead-out portions of the plurality of built-in objects can be kept constant. Therefore, interference between a plurality of built-in objects can be prevented, and damage can be prevented.

FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, an elastic coil 13 similar to that of the first embodiment is constructed using a band-shaped material. According to this configuration, the contact area of the elastic coil I3 with the multi-lumen tube 7 and the covering tube IZ is increased, and the contents are preserved accordingly.Figure 8 shows a fifth embodiment of the present invention. In this embodiment, one elastic coil 13 is sequentially wound around a plurality of internal components, such as an image guide fiber 9 and a light guide fiber 15, one by one through a covering tube 11.

According to this embodiment, the internal components of the sheathing can be covered with one elastic coil 13, and at the same time, each elastic coil is in close contact with the entire circumference of the sheathing tube.
Flexibility remains unchanged no matter which direction the built-in components are bent. Moreover, since close winding is also possible at the same time, there is little risk of the covering tube 11 being caught in the gap between the elastic coils 13.

Note that this embodiment may have any number of built-in parts, similar to the third embodiment. Furthermore, when enclosing elastic coils, the bending rigidity can be freely set by changing the material and pitch.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to easily prevent sudden changes in the flexibility of the lead-out portion of built-in objects led out from a multi-lumen tube using an elastic coil, and prevent damage to the built-in objects. can. Furthermore, when a covered tube is used for the built-in component, the covering tube and the multi-lumen tube can be easily connected.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the proximal end of the multi-lumen tube of the first embodiment, Fig. 2 is a side view of the entire endoscope of the same embodiment, and Fig. 3 is a perspective view of the multi-lumen tube of the same embodiment. FIG. 4 is a cross-sectional side view of the proximal end of the multi-lumen tube in a modified example, and FIG. 6 is a cross-sectional view of the proximal end of the multi-lumen tube in the third embodiment. A perspective view, FIG. 7 is a side sectional view of the central end of the multi-lumen tube in the fourth embodiment, and FIG. 8 is a perspective view of the base end of the multi-lumen tube in the M5 embodiment. 3... Insertion section, 7... Multi-lumen tube, 8
...Inner cavity, 9...Image guide fiber, 13.
...Elastic coil. Applicant's representative Patent attorney Tsuboi Floating tube 1 Figure 1 Figure 3 w & 4 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In an endoscope that uses a multi-lumen tube formed with a plurality of lumens as an insertion section, a portion that fits on the outer periphery of the end of the multi-lumen tube, and a portion that covers the outer periphery of the built-in object that is inserted into the lumen. An endoscope comprising an elastic coil consisting of a fitting part and a part connecting the two parts.