JPH0315043Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an endoscope having a protection member for protecting built-in items such as an optical fiber bundle.

[Technical background of the invention and its problems]

Inside the insertion section of the endoscope, various built-in items such as an optical fiber bundle, an air/water supply tube, a forceps insertion tube, etc. are housed together.

In particular, built-in items that are easily damaged, such as optical fiber bundles, are
As shown in the above-mentioned publication, the optical fiber bundle is covered with a single or double protective member, and this protective member is fixed to a cap provided at the end of the optical fiber bundle.
The fixing structure of this protective member is shown in Fig.
54317 (Utility Model Application Publication No. 55-155205)). That is, 1 is an optical fiber bundle,
A cap 2 is provided at this tip. A first small-diameter portion 4 and a second small-diameter portion 5 are provided at the connection portion of the cap 2 with the protrusion 3 interposed therebetween. A first protection member 6 for protecting the optical fiber bundle 1 is connected to the first small diameter portion 4, and a first protection member 6 for protecting the optical fiber bundle 1 is connected to the first small diameter portion 4.
A second protection member 7 is fitted on the outside of the protection member 6 . The distal end side of the second protective member 7 passes over the protruding portion 3 and fits into the second small diameter portion 5, and the outer periphery is bound with a thread 8, and the top thereof is fixed with an adhesive 9. There is.

Therefore, the connecting portion and adhesive layer of the second protection member 7 end up being thicker than the outer diameter of the second protection member 7. Similarly, the air and water supply tube
Also in tubes and forceps insertion tubes, the connecting portion is made thicker by connecting the tip to a mouthpiece or the like.

Therefore, as described above, in order to incorporate the thickened parts of the various internal components into the distal end component of the endoscope so as not to interfere with each other, there is a problem that the outer diameter of the distal end component must be increased. Figure 10 shows the insertion section 10.
This schematically shows the cross-sectional structure of the tip component 11, where the tip component 11 is thicker than the insertion portion 10.
Furthermore, if the assembly workability and the space for adjusting the focus of the optical fiber bundle 1 are ensured, the outer diameter of the distal end component 11 becomes even thicker, causing increased pain to the patient.

[Purpose of invention]

This invention was made with attention to the above-mentioned circumstances, and its purpose is to reduce the diameter of the tip component while avoiding interference between various internal organs, and to alleviate the pain inflicted on the patient. Our goal is to provide an endoscope that can

[Summary of the idea]

In order to achieve the above object, this invention consists of cutting out a part of the circumferential side wall near the connecting part on the distal end side of the protective tube member which covers the built-in contents and is fixed to the connecting member of the distal end component. be.

[Example of idea]

Hereinafter, embodiments of this invention will be described based on the drawings.

1 to 3 show a first embodiment, in which 10 is an insertion section of an endoscope, and 11 is a distal end component. This tip component 11 is provided with an observation window 12, an illumination window 13, and an air/water supply port (not shown). An objective optical system 14 is provided in the tip component 11 facing the observation window 12, and an optical fiber bundle 16 for observation whose tip end is fixed to a connecting member 15 is optically connected to the objective optical system 14. has been done. Further, an optical fiber bundle 18 for illumination, the tip of which is fixed to a connecting member 17, is optically connected to the tip component 11 facing the illumination window 13.
The rear end portions of the connecting members 15 and 17 protrude toward the insertion section 10 from the rear end surface of the distal end component 11, and the optical fiber bundles 16 and 18 are connected to the air/water supply tube connected to the air/water supply port. - It is installed inside the insertion section 10 together with the tube 19.

Furthermore, first protrusions 20 and 21 are provided at the rear end of the connecting member 15 and are spaced apart from each other in the axial direction, and a first connecting portion 22 and a second connecting portion 23 each having a small diameter portion are provided. ing. Further, the optical fiber bundle 16 is fitted with a first protective member 24 as a first protective tube member made of a flexible tube made of a material with good sliding properties. The portion extends over the first protrusion 20 and is bonded to the first connecting portion 22 . Further, a second protection member 25 as a second protection tube member is fitted on the outside of the first protection member 24, and the tip thereof passes over the second protrusion 21 to form a second protection member 25. It is fitted into the connecting portion 23 of No. 2. The tip of the second protection member 25 is bound with a thread 26 and then bonded with an adhesive. Therefore, a bulge a is formed at the connection portion of the second protection member 25. Note that the thread 26 may be omitted if the adhesive length is sufficient.

Further, the rear end portion of the connecting member 17 is also connected to the connecting member 1.
5, and the tip of a first protection member 27 serving as a first protection tube member into which the optical fiber bundle 18 is fitted is connected to the first connection portion 22. Furthermore, a second protection member 28 as a second protection tube member is fitted on the outside of the first protection member 27, and the expansion at the tip 29 of the second protection member 28 A portion adjacent to the outlet a and a portion adjacent to the air/water supply tube 19 are cut out diagonally to avoid interference. Therefore, the tip of the first protection member 27 is exposed through the notch 30,
The distal end extension 31 of the second protection member 28 is tied to the second connection member 23 with a thread 26 and further bonded with an adhesive 32.

With this configuration, built-in components such as the optical fiber bundles 1, 6, 18 and the air/water supply tube 19 can be placed in positions where they originally interfere with each other. The outer diameter of the can be reduced. Moreover, the cutout portion 30
As a result, gaps 33, 33 are formed between the first optical fiber bundle 16 and the second protection member 25. Therefore, focus adjustment is facilitated by gripping the connecting member 15 of the optical fiber bundle 16 with tweezers or the like and moving it in the axial direction. Also, during assembly work, a second
By finally assembling the optical fiber bundle 18 for illumination having the notch 30 of the protective member 28 into the tip component 11, there is an effect that the work can be carried out smoothly.

4 and 5 show a second embodiment, in which both sides of the tip of the protective member 34 that is fitted over the optical fiber bundles 18, 18 for illumination, that is, the optical fiber bundle 16 for observation Air and water supply tube 19
The side and tip component 11 adjacent to built-in objects such as
Notches 35, 35 are provided on the outer circumferential side. By configuring in this manner, the same effects as in the first embodiment can be achieved, and the outer diameter of the distal end component 11 can be further reduced by 2t, further reducing pain to the patient. be able to.

FIGS. 6 and 7 show a third embodiment, in which one piece 37 is left at the tip of a protective member 36 that is fitted onto an optical fiber bundle 18 for illumination, and the other parts are cut out. The same effects as in the first and second embodiments are achieved.

FIG. 8 shows a fourth embodiment, in which a relief part 39 consisting of a through hole or notch is provided at the tip of a protective member 38 that is fitted onto an optical fiber bundle 18 for illumination, and a connection part such as a base is provided. A fixing screw 41 for fixing the internal member of the connecting member 40 is screwed into the member 40 from the escape part 39 and the head thereof is positioned in the escape part 39, thereby preventing the fixing screw 41 from protruding from the protection member 38. be able to.

In addition, in each of the above embodiments, the protective member that is fitted onto the optical fiber bundle for illumination has been described;
It can also be applied to protective members for protecting built-in objects such as optical fiber bundles for observation, air and water tubes, and signal lines.

[Effect of idea]

As explained above, according to this invention, by providing a notch at the tip of the protective tube member that is fitted into the internal parts, the internal parts can be closely arranged without interfering with each other. It is possible to reduce the diameter of the tip component. Therefore, the pain caused to the patient can be reduced, and since there is more space between the built-in parts, the assembly work efficiency can be improved.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of this invention, with Figure 1 being a longitudinal side view of the distal end of the endoscope, and Figure 2 being a longitudinal side view of the distal end of the protective member. , FIG. 3 is a sectional view taken along the - line in FIG. 1, FIGS. 4 and 5 show a second embodiment of this invention, FIG. 4 is a side view of the protective member, and FIG. 6 and 7 show the third embodiment of this invention, FIG. 6 is a side view of the protective member, and FIG. −
8 is a perspective view of the tip of the protective member showing the fourth embodiment of this invention; FIG. 9 is a sectional view showing the connected state of the conventional protective member; FIG.
The figure is a schematic configuration diagram showing the cross-sectional structure of the insertion section and the distal end component. 11... Tip component, 17... Connection member, 18
...Optical fiber bundle (built-in), 28, 34, 36,
38...Protective member.

Claims (1)

[Scope of utility model registration request] a plurality of built-in objects such as optical fiber bundles whose distal ends are fixed to the distal end component via connecting members; a first protective tube member that covers each of the plurality of built-in objects and is fixed to the connecting member; and a second protective tube member that further covers at least one optical fiber bundle among the built-in components from the outside together with the first protective tube member and is fixed to the outer peripheral surface of the connecting member. What is claimed is: 1. An endoscope according to claim 1, characterized in that a part of the circumferential side wall near the connecting portion of the second protective tube member to the connecting member is cut out.