JPS62186836A - Curving operation wire mount structure 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 [Field of Industrial Application] The present invention relates to an improvement in the attachment structure between the tip body of an endoscope and a bending operation wire.

[Prior art] In order to attach the bending operation wire to the distal end body of the endoscope,
A common method is silver brazing.

However, in the case of small-diameter endoscopes such as those used for bronchial examinations,
Since the diameter of the operating wire used is small, the operating wire becomes dull due to the high heat applied during silver brazing work, resulting in a significant decrease in strength and the disadvantage that it may break during operation.

Therefore, conventionally, as shown in FIG. 6, for example, grooves are formed on the circumferential surface of the tip body a for half a circumference along the circumferential direction, and the grooves are formed rearwardly along the axial direction at both ends of the groove. It is known that one operating wire C is fitted into the groove and both ends are pulled out rearward (Jikko Sho GO-4I204).

[Problems to be Solved by the Invention] According to the above-mentioned conventional attachment structure for the bending operation wire of the endoscope, the operation wire C closes the cross section of the endoscope over half the circumference, as shown in Fig. 757. become. therefore,
Of the image guide fiber, forceps channel, and other various built-in objects d, e, f, and g that are inserted into the endoscope, the built-in objects f and g are inserted into the half of the side that is blocked by the operating wire C.
However, it will not be possible to insert the wire unless it is made thinner by the diameter of the operating wire C compared to the same thickness as e and d that could originally be inserted.

As a result, it is unavoidable that the quality of the observation image deteriorates or the size of the treatment instruments that can be used is reduced, resulting in a deterioration of the most important function of the endoscope, which is the observation and diagnosis ability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mounting structure for a bending operation wire of an endoscope, which eliminates such conventional drawbacks and can obtain a strong mounting force to the tip body in a small space.

[Means for Solving the Problems] The mounting structure for the bending operation wire of an endoscope according to the present invention, which solves the above problems, will be explained based on FIG. 1 corresponding to the embodiment. A stopper portion 1 is provided at the tip of the operating wire 10 that is operated to move forward and backward.
1 is formed, and a groove 12 is formed along the axial direction on the peripheral surface of the rear half of the distal end main body l of the endoscope. Then, the operation wire IO is inserted into the groove 12.

The stopper portion 11 protrudes from the circumferential surface of the tip body 1, and an annular body 7 is fitted and fixed to the circumferential surface of the tip body 1 from the rear, and the stopper portion 11 abuts on the end surface of the annular body 7. ing.

[Function] Since the operating wire 10 is fitted into the groove 12 and the annular body 7 covers the outside thereof, the operating wire 10 does not separate from the groove 12, and the stopper portion 11 formed at the tip of the operating wire is in contact with the end surface of the annular body 7, so even if the operating wire 10 is advanced or retreated, the operating wire 10 does not come out of the groove 12 and is firmly attached to the tip body 1.

[Example] A first example of the present invention will be described based on FIGS. 1 to 4.

FIG. 1 is a side sectional view of the embodiment, and FIG. 2 is its TI
-II line sectional view.

Reference numeral 1 denotes a main body of the distal end of the endoscope, which incorporates an objective lens 2, etc.; 3 indicates a curved section formed at the distal end of a flexible tube that can be bent by remote control; 1 is attached, and the tips of the so-called built-in items, such as the image guide fiber 4, the light guide fiber 5, and the forceps channel 6, which are pulled through the curved portion 3 to the hand side, have the above-mentioned tip configuration. It is attached to part 1.

Reference numeral 7 denotes a node ring which is a metal annular body, and the curved portion 3 rotatably connects the plurality of node rings 7 with a connecting shaft 8, and the outer side thereof is covered with an elastic outer tube 9 made of, for example, rubber. It is covered with.

1O indicates a pair of upper and lower operation wires that are remotely operated forward and backward by a known operation device (not shown), and the tip of this operation wire 10 is attached to the tip body 1,
By moving the operating wire 10 back and forth, the bending portion 3 is bent in the vertical direction.

The structure for attaching the tip end of the operating wire 10 to the main body l will be explained with reference to FIGS.
A stopper portion 11 is formed by folding back 80 degrees and solidifying it by soldering or the like, and protruding laterally. and,
In the peripheral surface of the rear half of the tip main body 1, grooves 12 large enough to fit the operating wire 1o are formed along the axial direction at the top and bottom of the peripheral surface, respectively. The operating wire 10 is fitted into the groove 12 and pulled out rearward, and the stopper portion 11 protrudes from the circumferential surface of the tip main body l.

On the other hand, the most advanced node ring 7 of the curved portion 3 is fitted onto the outer periphery of the tip main body l and fixed by soldering or screwing, and the stopper portion 11 is in contact with the front end surface of the node ring 7. are in contact with each other.

Further, the distal end portion of the outer skin tube 9 is watertightly joined to the outer peripheral surface of the distal end main body 1.

As described above, in this embodiment, since the operating wire 10 is fitted into the groove 12 of the tip main body l and the node ring 7 covers the outside thereof, the operating wire 101 does not come off from the old groove 12, and Since the stopper portion 11 at the tip of the operating wire is in contact with the end surface of the node ring 7, the operating wire 10 does not come out of the groove 12 even when the operating wire 10 is advanced or retreated, and is firmly attached to the tip body 1. There is.

Note that if the operating wire 10 is joined within the groove 12 by soldering or the like, the attachment of the operating wire 10 to the tip main body l becomes stronger.

FIG. 5 shows a second embodiment of the present invention, in which a member having a diameter larger than the wire, such as stainless steel pipe material, is fixed to the tip of the operating wire 20 by soldering or the like to form a stopper. 21 was formed. In this case as well, the operating wire 20 is firmly attached to the tip body 1 in the same manner as in the first embodiment.

[Effects of the Invention] According to the attachment structure of the bending operation wire of the endoscope of the present invention,
The operating wire is fitted into a groove formed on the circumferential surface of the tip body, and an annular body is fitted and fixed on the circumferential surface of the tip body, and a stopper portion formed at the tip of the operating wire is attached to the end face of the annular body. This allows the operating wire to be securely attached to the tip body in a small space, and because it does not block the cross section of the endoscope as in the conventional case, it is possible to thin built-in components such as the image guide fiber and forceps channel. This method has the effect of providing sufficient observational diagnostic ability.

In addition, in the event that a wire breaks, there is no need to replace all the wires as in the conventional case, and only the broken wire of the pair of wires needs to be replaced, making repairs easier. be.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■, FIGS. 3 and 4 are exploded perspective views of the first embodiment, and FIG. The figure is an exploded perspective view of a second embodiment of the present invention, FIG. 6 is an exploded perspective view of a mounting structure for a bending operation wire of a conventional endoscope, and FIG. 7 is a front sectional view thereof. ...Tip body, 7... Nodal ring (annular body), 1
0.20...Operation wire, 12.22...Groove. 11.21... Stopper Department Agent Patent Attorney Kazuhiko Mitsui Diagram 2 Procedural Amendment Document April 7, 1986 1, Indication of Case 1985 Patent Application vJZ8381
No. 2, Title of the invention: Endoscope bending operation wire attachment structure 3, Relationship with the amended case Patent applicant address: 2-36-9 Maeno-cho, Itabashi-ku, Tokyo Name (name) (052) Asahi Optical Industry Co., Ltd. 4, Agent: tSO Address: 502 Sunny Plaza Shinjuku Gyoen, 2-2-10 Shinjuku, Shinjuku-ku, Tokyo 6. Subject of amendment Detailed explanation of the invention in the specification 7
, content of correction

Claims (1)

[Scope of Claims] 1. A stopper part that protrudes laterally is formed at the distal end of the operating wire that is remotely operated to move forward and backward, and a stopper part is formed in the peripheral surface of the rear half of the distal end body of the endoscope in the axial direction. A groove is formed along the groove, and the operating wire is inserted into the groove to cause the stopper portion to protrude from the circumferential surface of the tip body, and an annular body is fitted and fixed to the circumferential surface of the tip body from the rear. A mounting structure for a bending operation wire of an endoscope, characterized in that the stopper portion is brought into contact with an end face of the annular body. 2. The mounting structure for a bending operation wire of an endoscope according to claim 1, wherein the stopper portion is formed by folding back the distal end portion of the operation wire. 3. The endoscope bending operation wire attachment structure according to claim 1, wherein the stopper portion is formed by fixing a member thicker than the diameter of the wire to the distal end of the operation wire. 4. An endoscope bending operation wire attachment structure according to claim 1, wherein the annular body is a node ring forming a bending portion.