JPH0728851B2 - Endoscope device - Google Patents

Description

Detailed Description of the Invention

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus applied to a front-viewing type endoscope or a side-viewing type endoscope, and more particularly to a distal end portion of a guiding tube introduced into a body cavity of a subject. The present invention relates to an endoscope device provided with a head portion.

[0003]

2. Description of the Related Art Conventionally, as shown in FIG. 7, an objective optical system for picking up an image of a region to be inspected is fixed to a head portion 10 provided at the tip of a guiding tube introduced into a body cavity of a subject. A guide sleeve 11 is provided, and the guide sleeve 1
In the vicinity of 1, there are an air supply tube for sending gas, a water supply tube for sending water, a light guide for guiding light to an illumination window for illuminating an examination site in a body cavity, and a tip of a processing tool. Guide holes are formed to guide and fix the forceps channels for guiding to the forceps ports. An outer peripheral wall 12 is formed on the head portion 10, and each channel except the objective optical system is fixedly guided by the outer peripheral wall 12. Then, a head cover 20 for protecting the inside of the body cavity is fitted onto the outer peripheral wall 12 while being guided.

[0004]

However, in the above-mentioned conventional endoscope apparatus, in order to fix and fix each channel including the objective optical system to the head portion 10, the outer peripheral portion of the head portion 10 is thick. The outer peripheral wall 12 of T is required. While the outer peripheral wall 12 becomes an obstacle in a medical endoscope apparatus aiming to make the diameter smaller, making the outer peripheral wall 12 as thin as possible causes problems in workability and accuracy, resulting in high cost. There was a problem that became.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope apparatus in which the diameter of the head portion is reduced and the workability is improved. [Structure of Invention]

[0006]

In order to achieve the above object, in the endoscope apparatus according to the present invention, a head portion is provided at the distal end portion of the guiding middle portion to be introduced into the body cavity, and the head portion is provided. In the endoscope device in which the cover is fitted to the above, a guide sleeve is formed in the head portion, and the objective optical system for imaging the examination site is guided and fixed by the guide sleeve. A part or the whole circumference is exposed from the head part in the fitting part of the head cover, the channel exposed part from the head part is guided by the head cover, and the other head channels are completed by fitting the head cover to the head part. It is a thing.

[0007]

In the present invention having the above structure, the objective optical system for picking up the image of the inspection site is fixedly guided by the guide sleeve formed in the head portion, and the head cover side guides the other channels. Therefore, it is not necessary to form an outer peripheral wall for guiding and fixing each channel in the head portion. As a result, the diameter of the head portion can be reduced and the workability can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the endoscope apparatus according to the present invention will be described below with reference to the accompanying drawings.

In describing this endoscope apparatus, the same or corresponding portions as those of the conventional endoscope apparatus will be described using the same reference numerals as those in FIG.

FIG. 4 is an overall configuration diagram of an endoscope apparatus to which the present invention is applied. The endoscope apparatus 1 includes a guiding hollow tube 2 that is introduced into the body cavity of a subject, and an operating unit 3 that is attached to the proximal end of the guiding hollow tube 2 and that operates the scope. It is connected to the apparatus main body 5 by the universal cord 4. A flexible portion 6 configured to be bendable and a stainless steel head portion 10 connected to the distal end of the flexible portion 6 are provided at the distal end portion of the guiding tube 2.

At the tip of the head portion 10, as shown in FIG. 5, an observation window 11a for observing an inspection site in a body cavity, an illumination window 13a for illuminating the inspection site, and an air supply port 14a for supplying air. A water supply port 15a for supplying water and a forceps port 16a for introducing the tip of a processing tool such as forceps into the body cavity are provided.

Further, the head portion 10 has a structure shown in FIGS.
As shown in FIG. 5, a guide sleeve 11 for fixing an objective optical system for imaging an examination site in a body cavity, and an illumination window 13
a light guide hole 13 for guiding and fixing a light guide for guiding light to a, a gas feeding tube hole 14 for guiding and fixing a gas feeding tube for feeding gas, and a water feeding tube hole for guiding and fixing a water feeding tube for feeding water 15. A forceps hole 16 for guiding a forceps channel for guiding the processing tool to the forceps port 16a is formed. Light guide hole 1
A plurality of 3 may be provided in the head portion.

Further, a cap-shaped head cover 20 for protecting the inside of the body cavity is attached to the head portion 10, and the head cover 20 is molded from a non-conductive material such as a synthetic resin material or an insulating material. As shown in FIGS. 1 and 2, the head cover 20 has a guide sleeve 11, a light guide hole 13, and an air supply tube hole 1 in the head portion 10.
4, the water supply tube hole 15, and the sleeve hole 21, which communicates with the forceps hole 16, respectively, the light sleeve 23, the air supply sleeve 24, the water supply sleeve 25, and the forceps sleeve 2.
6 is integrally formed. And the head cover 20
The guide sleeve 11 is fitted with the light sleeve 23, the air supply sleeve 24, and the water supply sleeve 25 when it is fitted to the head portion 10.
The head cover 20 is fixed by being inserted into the space formed by the forceps sleeve 26.

As described above, in the head section 10, the objective optical system, which is required to have a high mounting accuracy, is fixed to the guide sleeve 11, and other channels such as a light guide, an air feeding tube, and
The water supply tube and the forceps channel are provided with the head cover 20.
Light sleeve 23 and air supply sleeve 2 integrally formed on the
4, the water supply sleeve 25, and the forceps sleeve 26 communicate with the head portion 10 side. Therefore, the outer peripheral wall is not formed on the head portion 10 for fixing the channel to the guide, and the diameter of the head portion 10 can be reduced accordingly.

In the above structure, when observing the inside of the body cavity of the subject, the operator introduces the guiding tube 2 into the body cavity and then performs an angle operation with the operation unit 3 to move the head near the examination site. Position the part 10. Then, as shown in FIG. 5, light is radiated from the illumination window 13a to the inspection site, and the optical image thereof is incident on the imaging unit 17 including the objective optical system and the CCD through the observation window 11a. The image pickup unit 17 sends a video signal to the apparatus main body 5 through a signal line, the apparatus main body 5 displays an image formed based on the video signal, and the operator observes the displayed image.

FIG. 6 shows a second embodiment of the present invention, and the same or corresponding portions as those of the first embodiment will be described with the same reference numerals. In the present embodiment, the light guide hole 13, the air supply tube hole 14, the water supply tube hole 15, and the forceps hole 16 in the head portion 10 are notched and formed, but the notch portion is formed by the inner peripheral wall of the head cover 20. Covered. The channels other than the objective optical system, that is, the air supply tube, the water supply tube, the light guide, and the forceps channel are guided and fixed by fitting the head cover 20 to the head portion 10. In this case, the head cover 20 does not need the light sleeve 23, the air supply sleeve 24, the water supply sleeve 25, and the forceps sleeve 26 as in the first embodiment, and may simply have holes.

As described above, according to the present embodiment, since the sleeves are not formed on the head cover 20, the structure can be simplified. The rest of the configuration and operation are the same as in the first embodiment, so a description thereof will be omitted.

In the above embodiment, an example in which the present invention is applied to a front-viewing type endoscope has been described, but other than this, it is also applicable to a side-viewing type endoscope.

[0019]

As described above, according to the present invention,
A guide sleeve is formed on the head part, and the guide sleeve fixes the objective optical system for imaging the inspection site. The other channels formed around the guide sleeve are fitted to the head part and the head cover. Part of the head part is exposed from the head part, the channel exposed part from the head part is guided by the head cover, and the other respective channels are completed by fitting the head cover to the head part. At least a part of each channel outer peripheral wall can be loaded on the head cover side, and it is not necessary to form the channel outer peripheral wall in the head portion by that amount, and the diameter of the head portion can be reduced, and It is designed to be compact and compact. Further, when it is not necessary to form the outer peripheral wall of the other channel on the head portion, the machining for forming the outer peripheral wall of the channel is not required, the workability is remarkably improved, and the cost can be reduced. Produce an effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a head portion and a head cover in a first embodiment of an endoscope apparatus according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing a state in which a head cover is fitted to the head portion.

FIG. 4 is a perspective view showing the overall configuration of an endoscope apparatus to which the present invention has been applied.

5 is an enlarged perspective view showing the tip of the guiding hollow tube of FIG.

FIG. 6 is a perspective view showing a head portion and a head cover in a second embodiment of the endoscope apparatus according to the present invention.

FIG. 7 is a cross-sectional view showing a state in which a head cover is fitted to a head portion in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endoscope device 2 Guide tube 10 Head part 11 Guide sleeve 20 Head cover.

Claims (1)

[Claims] 1. An endoscope apparatus in which a head portion is provided at a tip end portion of a guiding center portion to be introduced into a body cavity, and a head cover is fitted to the head portion, a guide sleeve is formed on the head portion, and the guide sleeve is used. The objective optical system for imaging the inspection site is fixed by a guide, and the other channels formed around the guide sleeve are partially or entirely exposed from the head portion at the fitting portion of the head portion and the head cover. An endoscope apparatus, wherein a channel exposed portion from the head portion is guided by a head cover, and the other head channels are completed by fitting the head cover to the head portion.