JPS58163330A - Flexible tube of endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible tube for an endoscope that is configured to prevent dust from forming on the flexible tube due to separation between the outer skin tube and the mesh blade.

Generally, as shown in FIG. 1, an endoscope 1 includes a distal end portion 2 equipped with a light guide, an objective lens, an air/water supply port, a forceps mouthpiece, and an operating section main body 5 equipped with a contact portion 6 and the like. , a curvature 11 and a flexible tube 4 connected between the tip portion 2 and the operation portion main body 5.

As shown in FIGS. 2 and 1, the flexible tube 4, which is entirely in the shape of a flexible pipe, has a lettuce 7 placed on the innermost side to prevent crushing, and this flex 7 is It is surrounded by a net-shaped braid 8 to prevent twisting, and an adhesive 13 is applied to the entire or partial outer periphery of the net-shaped braid 8 to create an outer skin! The mesh blade 8 is covered with a wrinkled skin tab 9 and fixed to the outer circumferential surface of the net-like blade 8 so as not to peel off.

In addition, a ring-shaped intermediate cap 10 and a rear cap 11 are integrally fixed to the flex 7 and the blade 8 by soldering to both ends of the flexible tube 40, and are attached to the inside of the lettuce 7. A coil pipe 12 through which an operating wire is inserted is inserted through the rear base 11 and fixed to the intermediate base 10 by brazing.

The flexible tube 4 of the conventional endoscope configured in this way is
Since the net-like blade 8 is made of metal wire such as stainless steel or brass, an outer skin tube 9, which is generally made of synthetic resin, etc., is attached to the blade 8 with adhesive to prevent water leakage. Even if they are bonded together, the adhesive strength is weak and the two easily peel off, which has the drawback of causing buckling of the flexible tube.

The present invention has been made to eliminate such drawbacks, and includes coating a net-like blade whose surface is coated with an adhesive with a melted outer skin TAVE material so as to fill at least a portion of the mesh portion of the net-like blade. , at least a portion of the rope-like braid and the sheath tube are integrated via an adhesive to improve the bonding force between the sheath chain and the net-like braid, thereby preventing buckling of the flexible tube due to separation of the two. It is an object of the present invention to provide a flexible tube for an endoscope configured as described above.

Next, the present invention will be explained in detail based on examples.

FIG. 4 is a partially omitted enlarged cross-section of an embodiment of the flexible tube of the endoscope according to the present invention. In the vIJ diagram, 7 is a flex made of metal ribbon material arranged on the inside [K], and on the outside, like the conventional one, a
A net-like blade 8 made of UII%FB# metal wire is arranged. And adhesive such as polyurethane on the outer circumferential surface of the net-like blade! , and its outer periphery is covered with a tube material made of synthetic resin melted using a tape extrusion machine. ! Then, as soon as it reaches the outer surface of the flex 7 or the inner surface of the blade 8, the mesh part of the mesh braid 8 is filled and the mesh braid is wrapped around the mesh braid 8. The outer skin chain is integrated through it! , which constitutes the flexible tube 4. In addition, as the synthetic resin for the above-mentioned outer skin Dex, -7' material, Boliure! Polyester, polyvinyl chloride, and other thermoplastic synthetic resins are used.

In the above example, adhesive 1! is applied to all outer surfaces of the metal wires forming the reticulated braid. Although the adhesive is shown to be coated with I, the adhesive may be provided partially on a part of the outer surface of the net-like blade, or it may be provided so as to fill the mesh part. , outer skin chain! teeth,
Although a configuration is shown in which the outer skin tube 9 is configured to wrap around the entire net-like blade, the same effect can be obtained even if the outer skin tube 9 is configured to wrap around a part of the net-like blade.

As described above in detail based on the embodiments, in the flexible pipe of the inner convex pipe according to the present invention, the outer sheath chain is
Since the outer circumferential surface of the net-like braid is formed with 5K so as to wrap at least a part of the net-like braid via an adhesive, the bonding force between the outer skin chain and the net-like braid is determined by the bonding force of the adhesive and the outer skin. Together with the bonding force due to at least a portion of the integrated blade with the gourd net-like blade, separation of the two is prevented, and as a result, the seat of the flexible tube that occurs due to separation is strengthened. bending can be effectively prevented.

[Brief explanation of the drawing]

Figure 1 is a partially omitted external view of a general endoscope, IIE
Figure 2 is a partially cutaway side view of the flexible tube of a conventional endoscope;
The figure is an enlarged sectional view of the main part of the flexible tube shown in FIG. 2, and FIG. 4 is an enlarged sectional view of the main part of the flexible tube of the endoscope according to the present invention. In the figure, 1 is the endoscope, 2 is the tip, black is the part of the curvature, and 4
5 is a flexible tube, 5 is an operating section main body, 7 is a flex, 8 is a blade, 9 is an outer skin tube, and 15 is an adhesive. Patent applicant Olympus Optical Industry Co., Ltd. Taku 11 Genshin 21!
12th episode 3) Illusion? to the fourth country

Claims (1)

[Claims] A spiral flex to prevent the flexible tube from collapsing,
In the flexible tube of an endoscope, the flexible tube is composed of a net-like blade arranged outside the flexible tube to prevent twisting of the flexible tube, and an outer skin tube made of synthetic resin or the like and arranged on the outermost side. A flexible tube for an endoscope, characterized in that: is fixedly formed on the outer circumferential surface of the net-like blade via an adhesive so as to wrap and integrate at least a part of the net-like blade.