JPH0866353A - Forward-viewing type electronic endoscope for medical treatment - Google Patents

Abstract

PURPOSE: To provide a forward-viewing type electronic endoscope for medical treatment, allowing the easy concurrent use of two medical treatment aids, regarding an electronic endoscope using a solid-state image-pickup element. CONSTITUTION: Two treatment aid insertion channels 11 and 12 for passing treatment aids 101 and 102 are arranged right and left above a solid-state image- pickup element, and constitution is so made that the aids 101 and 102 projected forward via the internal space of the channels 11 and 12 appear in an observation image screen 100 photographed with the element, from upper right and left positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front-viewing type medical endoscope for observing an object in front of a distal end body.

[0002]

2. Description of the Related Art When attempting to perform a little full-scale treatment using a thin forward-looking electronic endoscope for bronchi, etc.,
Since two treatment tools must be used at the same time,
It is necessary to provide two treatment instrument insertion channels for inserting treatment instruments.

Therefore, in a conventional forward-looking electronic endoscope for bronchial treatment, two treatment instrument insertion channels are provided.
It was placed on both sides of the observation optical system.

[0004]

As described above, when the two treatment instrument insertion channels are arranged on both sides of the observation optical system with the observation optical system interposed therebetween, the two treatments projecting forward through the treatment instrument insertion channels. The tools are projected from opposite diagonal directions in the observation screen, for example, from the upper right and lower left, or from the upper left and lower right.

However, when the two treatment tools come out in opposite directions on the observation screen, it is very difficult to perform the treatment operation. Therefore, it is an object of the present invention to provide a front-viewing type electronic endoscope for treatment, which is an electronic endoscope using a solid-state image pickup element and which makes it easy to use two treatment tools at the same time.

[0006]

In order to achieve the above-mentioned object, a forward-looking electronic endoscope for treatment according to the present invention comprises a solid-state image pickup device for picking up an image of a subject in front of the distal end body. In the forward-looking electronic endoscope for treatment incorporated in the distal end portion main body, two treatment instrument insertion channels for inserting treatment instruments are arranged at the upper right and upper left of the solid-state imaging device, and It is characterized in that the treatment tools protruding forward through the treatment tool insertion channel come out from the upper right corner and the upper left corner in the observation image screen imaged by the solid-state imaging device.

The electronic circuit for the solid-state image pickup device is arranged in the lower half of the tip end main body with the cross-sectional shape being elongated behind the solid-state image pickup device, and the two treatment tools are inserted therethrough. Channels may be located to the right and left of the upper half of the tip body.

[0008]

Embodiments will be described with reference to the drawings. Figure 2
It is a front view of the tip of the insertion part of a front-viewing type electronic endoscope for bronchus, the observation window 13 is arrange | positioned at the center lower part, and the objective optical system and solid-state image sensor 35 mentioned later are arrange | positioned in the back. Has been done.

Illumination windows 14 and 1 are provided on both left and right sides of the observation window 13.
4 is arranged, and the exit end of the light guide fiber bundle is arranged behind it. Further, the two treatment tool projecting openings 11a and 12a are arranged at the upper right and upper left positions.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2, in which the curved portion 2 formed at the distal end of the insertion portion has a large number of node rings 15 ... The reticulated tube 16 is covered with the rubber tube 1 on the outside.
It is covered with 7 etc. The end portion of the rubber tube 17 is tightly bound and joined to the outer peripheral surface of the tip portion main body 3.

In FIG. 3, the two node rings 15, 15 on the tip side are shown.
Although only the illustration is shown, a stop ring 20 for fixing the operation wire 18 is projectingly provided on the inner surface of the node ring 15 at the front end, and a tip of the stop ring 20 from the stop ring 20 is provided at the tip of the operation wire 18. Retaining ring 2 as a reinforcing material to prevent slipping out
1 is fixed.

The tip portion main body 3 is connected to the tip of the bending portion 2 via a connecting ring 19. The connecting ring 19 is a joint ring 1
5 is soldered and is connected to the tip portion main body 3 by a pin (not shown).

The tip end main body 3 is formed of, for example, stainless steel into a cylindrical shape, the rear end is open, and the tip end portion is closed by a wall except for the window portion and the like.

An objective optical system 25 is disposed inside the observation window 13 so as to be fixed inside a metallic lens frame 24. Between the lens frame 24 and the tip body 3, and between the lens frame 24 and the objective optical system 2
5 and 5 are watertightly joined.

An insulating connecting ring 30 made of an electrically insulating plastic material is fitted, joined and held on the outer periphery of the rear portion of the lens frame 24, and is provided between the outermost lens outer periphery and the insulating connecting ring 30. Are sealed by the defoamed epoxy adhesive 31.

The outer periphery of the insulating connection ring 30 is formed such that the latter half portion thereof is slightly thinner than the front half portion, and the tip end of the metallic shield cylinder 32 is fitted and joined to the portion and held therein.

The shield cylinder 32 is formed in a vertically-long, substantially rectangular cross-section when viewed from the front. This is in conformity with the cross-sectional shape of the solid-state image sensor 35 arranged therein.

The rear end of the shield cylinder 32 reaches the boundary with the curved portion 2, and an electrically insulating tape 36 is wound around the entire outer periphery thereof. The rear end of the insulating tape 36 covers the outer periphery of the front end of the signal cable 43 described later.

A solid-state image sensor 35, which is, for example, a charge-coupled device (CCD), is fixed inside the shield cylinder 32 at a position closer to the front with the image receiving surface facing forward. When the solid-state image sensor 35 is viewed from the front, the image-receiving surface is formed in a substantially square shape but is formed in a substantially rectangular shape as a whole, and is arranged so as to be vertically long when viewed from the front.

A transparent cover glass 37 is arranged on the front side thereof, and a YAG laser light cut filter 38 is further attached to the front surface thereof. The observation light image is formed on the image receiving surface of the solid-state image sensor 35 by the objective optical system 25 through the transparent members 37 and 38.

Reference numeral 42 denotes a wiring board, which is a solid-state image sensor 35.
An electronic component 40 for forming a drive circuit for driving the, an amplifier circuit for amplifying an output signal from the solid-state imaging device 35, and the like is attached.

The position of the rear end portion of the wiring board 42 and the position of the rear end portion of the shield cylinder 32 are substantially coincident with each other, and the signal cable 43 extends rearward from that position into the bending portion 2 and the flexible tube 1. Has been towed. The shield tube 32 is connected to the shield of the signal cable 43 by soldering.

Further, an insulating tape 34 is continuously wound around the entire surface of the components arranged in the shield cylinder 32 to ensure electric insulation between the shield cylinder 32 and the shield cylinder 32. There is.

The forceps channel 11 is, for example, a tube having a regular circular cross section made of tetrafluoroethylene resin, and the tip portion thereof is inserted into a cylindrical connecting pipe 50 made of stainless steel from the rear side. It is inserted and glued. Since the tetrafluoroethylene resin does not have a good adhesiveness as it is, a chemical pretreatment is carried out before the adhesive to allow a long adhesive margin.

The tip of the connecting pipe 50 is fitted and joined from the rear to a treatment instrument projecting opening 11a formed at the most distal end of the tip body 3. Since metals have good adhesiveness, sufficient bonding strength can be obtained even with a short adhesion margin.

The treatment instrument insertion channel 11 is provided along the shield cylinder 32 surrounding the electronic circuits 40 and 42.
The distal end body 3 is drawn from inside the tubular portion into the rear curved portion 2.

Although only the first treatment instrument insertion channel 11 is shown in FIG. 3, the second treatment instrument insertion channel 12 also communicates with the second treatment instrument projection opening 12a. It is arranged in parallel with the treatment instrument insertion channel 11.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, in which the shield cylinder 32, which is formed in a vertically long substantially rectangular shape and surrounds the electronic circuits 40 and 42, is located in the central lower half portion of the tip body 3. And light guide fiber bundles 5 and 5 for illumination are inserted on both sides thereof. Then, the first and second treatment instrument insertion channels 11 and 12 are inserted into the right side and the left side of the upper half of the distal end body 3.

FIG. 5 is a sectional view taken along line V-V in FIG. 3, in which the connecting ring 19 positioned so as to project on the inner surface of the tip end main body 3 includes the treatment instrument insertion channels 11 and 12 and the shield tube 32. The part that interferes is cut out.

The shield cylinder 32 is arranged in the central lower half of the tip body 3, and the first and second treatment instrument insertion channels 11 and 12 are provided on the right and left sides of the upper half of the tip body 3. 4 is the same as that of FIG.

In the electronic endoscope having the distal end configured as described above, when the treatment tools are projected from the treatment tool projection ports 11a and 12a through the both treatment tool insertion channels 11 and 12, FIG. As shown, two treatment tools 10
1, 102 are observed so as to come out from the upper left and upper right in the observation video screen 100 which is imaged by the solid-state imaging device 35 and displayed on the monitor television.

[0032]

According to the present invention, when two treatment tools are used at the same time, the two treatment tools come out from the upper right and the upper left in the observation image screen, which is very easy to use.
Endoscopic treatment can be safely performed in the bronchus.

[Brief description of drawings]

FIG. 1 is a schematic view showing an observation screen of an example.

FIG. 2 is a front view of the electronic endoscope for front-view treatment according to the embodiment.

FIG. 3 is a side sectional view (III-III sectional view) of the embodiment.

FIG. 4 is a sectional view taken along line IV-IV of the embodiment.

FIG. 5 is a sectional view taken along line VV of the example.

[Explanation of symbols]

 11, 12 Treatment tool insertion channel 11a, 12a Treatment tool projecting port 35 Solid-state image sensor 100 Observation image screen 101, 102 Treatment tool

Claims (2)

[Claims] 1. A front-viewing type electronic endoscope for treatment in which a solid-state image pickup device for capturing an image of a subject in front of a distal end body is built in the distal end body for inserting a treatment instrument. Two treatment instrument insertion channels are arranged at the upper right and upper left of the solid-state imaging device,
The treatment instruments protruding forward through the treatment instrument insertion channel come out from the upper right and the upper left in the observation image screen imaged by the solid-state image sensor. Forward-looking electronic endoscope for treatment. 2. An electronic circuit for the solid-state image pickup device is arranged in the lower half of the tip end main body with a vertically elongated cross-sectional shape behind the solid-state image pickup device. The front-view electronic endoscope for medical treatment according to claim 1, wherein the insertion channels are arranged on the right and left of the upper half of the distal end body.