JPH069539B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an endoscope in which an insertion portion is formed by using a perforated tube.

[Conventional technology]

An endoscope in which an insertion portion is constructed by using a perforated tube having a plurality of holes formed in the longitudinal direction is disclosed in Japanese Utility Model Publication No. 60-24323. Each hole of the perforated tube is used as a channel for inserting an image guide fiber or a light guide fiber, and is also used as a water supply channel or a treatment instrument insertion channel.

[Problems to be solved by the invention]

When the image guide fiber or the light guide fiber is inserted into the channel, it may be considered that the outer tube is not inserted in order to make the diameter of the insertion portion as small as possible.

However, each fiber is led out from the end surface of the porous tube, and a water supply tube, a forceps insertion tube, etc. are connected. That is, the components from each hole of the perforated tube are gathered together and are very crowded.

For this reason, the work of incorporating each component is troublesome. Moreover, since the image guide fiber and the light guide fiber are not provided with the outer tube, they may be easily broken when an external force is applied near the exit of the hole of the perforated tube.

Further, since the internal space of the operation portion main body is small, it is difficult to arrange each component.

An object of the present invention is to prevent each component such as a fiber arranged in each hole of a perforated tube from being congested in an operating portion, and further to prevent the fiber from being broken due to an external force applied during an assembly operation. To do.

[Means and Actions for Solving Problems]

The present invention uses a perforated tube formed by forming a plurality of holes along the longitudinal direction as an insertion portion, and arranges components such as fibers in the respective holes, and from the proximal end portion of the perforated tube into the operation portion. In the endoscope to be led out, the base end portion of the porous tube is provided with a step having different end face positions in the longitudinal direction, and at least one stepped portion is formed with an opening of a hole for leading out the fiber, An opening for leading out the constituent elements other than the above fiber was formed in the other step portion.

This prevents the constituent elements such as the fibers arranged in the respective holes of the perforated tube from being congested in the operation portion, and thus prevents the fibers from being broken due to an external force applied during the assembling work.

〔Example〕

1 and 2 show a first embodiment of the present invention.

FIG. 2 shows a small-diameter endoscope, for example, a blood vessel endoscope 1.
The endoscope 1 is composed of an insertion section 2, an operation section 3 and a light guide cable 4, and a tip forming section 5 is connected to the tip of the insertion section 2. The operation section 3 is provided with an eyepiece section 6 and a treatment instrument insertion port 7. A connector 8 is connected to the extending tip of the light guide cable 4.

On the other hand, the insertion portion 2 is configured by using a perforated tube 11 which is a resin molded product and has a large number of holes 10 penetrating over the entire length thereof along the major axis direction thereof. Each hole 10 serves as a channel in which various components are arranged. For example, image guide fiber 12
, A channel for inserting the light guide fiber 13, an air supply channel, a treatment instrument insertion channel, a balloon air supply channel, and a suction channel. The image guide fiber 12 and the light guide fiber 13 are directly inserted into the channel without fitting the outer tube.

Further, as shown in FIG. 1, the base end portion of the porous tube 11 is provided with a step portion 14 by cutting off the upper side portion, thereby forming two end surfaces 15 and 16 on the base end side. . Then, on the end face 15 on the side of the protruding portion 17, an opening 18 of a channel through which the image guide fiber 12 is inserted and an opening 19 of a channel through which the light guide fiber 13 is inserted are arranged side by side. Further, on the end face 16 on the base end side of the stepped portion 14, for example, an opening 20 of the water supply channel and an opening 21 of the treatment instrument insertion channel are opened side by side. One ends of connection pipes 22 and 23 are fitted into and connected to the openings 20 and 21, respectively. The projecting portions of the connecting pipes 22 and 23 are bent in a direction away from the projecting portion 17 as shown in FIG. A water supply tube 24 (not shown) is connected to the connection pipe 22 on the water supply channel side. The water supply tube 24 is guided to the connector 8 through the operation section 3 and the light guide cable 4. Further, a channel tube (not shown) is connected to the connection pipe 23 on the side of the treatment instrument insertion channel, and the channel tube is connected to the treatment instrument insertion port 7 of the operation portion 3.

Further, the image guide fiber 12 and the light guide fiber 13 are led out into the operation portion 3, and the portions on the lead-out side are covered with protective outer tubes 25 and 26, respectively. It is to be noted that these fibers 12, 13 are desired to be completely covered up to the root of the lead-out portion, but since the vicinity is crowded, the fibers are covered only halfway. So, these fibers 12,
13 is further stored in a protective tube 27. The tip of the protective tube 27 is fitted and fixed to the projecting portion 17 at the base end of the porous tube 11 as shown by the chain double-dashed line in FIG.

Therefore, in the above-mentioned configuration, the openings 18, 19, 20, 21 of the holes 10 in the porous tube 11 have two end faces 1
Since they are divided into 5 and 16 respectively, the components derived from the openings 18, 19, 20, and 21 are separated. Therefore, the derived components are not crowded.
That is, the opening 18 of the channel through which the image guide fiber 12 is inserted and the opening 19 of the channel through which the light guide fiber 13 is inserted are the end faces 15 of the protrusions 17.
Since the optical fiber 12 and the optical fiber 12 are disposed so as to be branched from the openings 20 and 21 of the other one, the fibers 12 and 13 thereof are less likely to interfere with each other. Further, the protective tube 27 facilitates the protective exterior. In addition, assembling these within the operation unit 3 is easy.

FIG. 3 shows a second embodiment of the present invention.

In this embodiment, a hole 30 is formed in the base end surface of the porous tube 11, and openings 18 and 19 of the respective channels through which the image guide fiber 12 and the light guide fiber 13 are inserted are arranged on the inner bottom surface of the hole 30. Arrange. Further, one end of the pipe 31 is fitted into and fixed to the hole 30. Further, one end of a protection tube 27 into which both the image guide fiber 12 and the light guide fibers 12 and 13 are inserted is fitted and connected and fixed to the protruding outer peripheral portion of the pipe 31. Since the protective tube 27 is provided, the outer tubes 25 and 26 which are to be wrapped around the respective fibers 12 and 13 have the same fibers 12 and 13.
It is not necessary to cover the root of the derived part of.

Further, the outer circumference of the base end portion of the porous tube 11 is formed in a tapered shape, and the tapered peripheral surface 32 is formed with openings 20 and 21 of other channels. Then, in each of the openings 20 and 21, a connection pipe 2 similar to that of the above-described embodiment is provided.
2, 23 are connected. In addition, each of the openings 20,
21 are located on opposite sides of each other and are arranged in a branched state.

Since the openings 20 and 21 are formed on the tapered peripheral surface 32 in this manner, the members can be easily assembled.

4 and 5 show a third embodiment of the present invention.

In this embodiment, a notched recess 35 is formed at the base end of the porous tube 11, and a pair of protrusions 36 are provided on the left and right of the recess 35.
An opening 18 for the image guide fiber channel is formed on the tip end surface of one of the protrusions 36, and an opening 19 for the light guide fiber channel is formed on the tip end surface of the other protrusion 36. Has been formed. Also,
As shown in FIG. 5, the outer tubes 25 and 26 for protecting the fibers 12 and 13 are provided on the protrusions 36, respectively.
Is fitted and fixed by connection.

On the other hand, a push-in member 37 as shown in FIG. 4 is fitted in the concave portion 35, and the left and right projecting portions 36 are pushed apart to be branched. The pushing member 37 is composed of a protrusion 38 having a thickness the same as the width of the recess 35 and an expanding portion 39 that spreads left and right from the protruding portion 38, and the expanding portion 39 widens the protrusion 36 left and right. .

In addition, the pushing member 37 has channel pipes 41, 42.
Is inserted, one channel pipe 41 communicates with the water supply channel, and the other channel pipe 42 communicates with the treatment instrument insertion channel. Then, the projections of the channel pipes 41 and 42 form the openings 20 and 21 of the respective channels.

The openings 18 and 19 through which the image guide fibers 12 and 13 are led out are laterally expanded and branched by the pushing member 37, and are also separated from the central openings 20 and 21. Further, since the protruding portions 36 protrude to the left and right, the outer tubes 25 and 26 can be easily attached.

〔The invention's effect〕

As described above, according to the present invention, in particular, each component such as the fiber arranged in each hole of the perforated tube is prevented from being congested in the operation portion, and thus the fiber is broken by the external force applied during the assembly work. Can be prevented.
Furthermore, since there is no need to worry about breaking the fibers during assembly, the assembly time can be shortened and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a branch portion in the first embodiment, FIG. 2 is a side view of an endoscope of the same embodiment, and FIG. 3 is a side sectional view of a branch portion in the second embodiment. FIG. 4 is a perspective view of the base end portion in the third embodiment, and FIG. 5 is a side sectional view of the branch portion thereof. 1 ... Endoscope, 10 ... Hole, 11 ... Perforated tube, 1
2 ... Image guide fiber, 13 ... Light guide fiber, 18 ... Aperture, 19 ... Aperture, 20 ...
Aperture, 21 ... Aperture.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Nobuaki Akui 2-43-2 Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd. (72) Inventor Yoshio Tashiro 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Tsuruo Hatori 2-43-2 Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd. (56) Reference JP-A-58-86131 (JP, A) Kai 53-12199 (JP, A) Unexamined Japanese Patent Sho 53-139390 (JP, A) Actual Open Sho 58-95841 (JP, U) Actual Open Sho 60-69139 (JP, U) Actual Open Sho 60-23042 ( JP, U) JP-B 48-28750 (JP, B1) JP-B 51-16627 (JP, B2) JP-B 60-24323 (JP, Y2)

Claims (1)

[Claims] 1. A perforated tube having a plurality of holes formed in the longitudinal direction is used as an insertion part, and a component such as a fiber is arranged in each of the holes, and a proximal end of the perforated tube is inserted into an operation part. In the endoscope adapted to be led out, a step having different end face positions in the major axis direction is provided at the base end of the porous tube, and the opening of the hole for leading out the fiber is formed in at least one step. An endoscope characterized in that an opening for leading out a component other than the fiber is formed in another step portion.