JPH04259436A - Endoscope device - Google Patents

Abstract

PURPOSE:To provide a device for an endscope the head portion of which is reduced in diameter and whose processability is enhanced. CONSTITUTION:A device for an endoscope comprising a head portion 10 provided at the end portion of a guide tube introduced into a body cavity, a cover 20 fitted over the head portion 10, a guide sleeve 11 formed in the head portion 10, an objective optical system adapted for taking an image of a portion for inspection and fixed by the guide sleeve 11, and other channels fixed to the head cover 20 by the guide.

Description

[Detailed description of the invention]

[Object of the invention]

0002

[Field of Industrial Application] The present invention relates to an endoscope device applied to a forward-viewing endoscope or a side-viewing endoscope, and particularly to the distal end 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 imaging an examination site is fixed to a head section 10 provided at the distal end of a guiding tube introduced into a body cavity of a subject. A guide sleeve 11 is provided, and this guide sleeve 1
1 is surrounded by an air tube for sending gas, a water tube for sending water, a light guide for guiding light to a lighting window for illuminating the examination site in the body cavity, and the tip of the treatment tool. Guide holes are drilled to guide and fix the forceps channels to guide the forceps to the forceps opening. Further, an outer circumferential wall 12 is formed on the head portion 10, and each channel except the objective optical system is guided and fixed on this outer circumferential wall 12. A head cover 20 for protecting the inside of the body cavity is fitted onto the outer peripheral wall 12 while being guided.

0004

[Problems to be Solved by the Invention] However, in the above conventional endoscope apparatus, in order to guide and fix each channel including the objective optical system in the head part 10, a thick wall is added to the outer periphery of the head part 10. Therefore, the outer peripheral wall 12 of T is required. This outer circumferential wall 12 becomes an obstacle in medical endoscope devices aiming for a smaller diameter, while making the outer circumferential wall 12 as thin as possible causes problems in workability and accuracy, resulting in high costs. There was a problem with becoming.

The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide an endoscope device in which the diameter of the head portion is reduced and workability is improved. [Structure of the invention]

[0006]

[Means for Solving the Problems] In order to achieve the above object, an endoscope device according to the present invention is provided with a head portion at the distal end of a guiding tube introduced into a body cavity. In an endoscope device in which a cover is fitted to the head part, a guide sleeve is formed in the head part, and the guide sleeve guides and fixes the objective optical system for imaging the examination part, and the other channels are connected to the head cover. It is characterized by being guided by the side.

[0007]

[Operation] In the present invention having the above configuration, the objective optical system for imaging the inspection area is guided and fixed by the guide sleeve formed on the head part, and the other channels are guided on the head cover side. This eliminates the need to form an outer peripheral wall for guiding and fixing each channel to the head portion. As a result, the diameter of the head portion can be reduced, and workability can also be improved.

[0008]

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

In explaining this endoscope device, the same reference numerals as in FIG. 7 will be used for the same or corresponding parts as in the conventional endoscope device.

FIG. 4 is an overall configuration diagram of an endoscope apparatus to which the present invention is applied. This endoscope device 1 consists of a guide tube 2 that is introduced into the body cavity of a subject, and an operating section 3 that is attached to the proximal end of the guide tube 2 and is used to operate the scope. It is connected to the device main body 5 by a universal cord 4. The leading end of the guiding tube 2 is provided with a bendable flexible part 6 and a stainless steel head part 10 connected to the leading end of the flexible part 6.

At the tip of the head section 10, as shown in FIG. 5, there are an observation window 11a for observing the examination site inside the body cavity, an illumination window 13a for illuminating the examination 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 treatment tool such as forceps into the body cavity.

[0012] The head portion 10 also has a structure shown in FIGS.
As shown in FIG. 2, a guide sleeve 11 and an illumination window 13 guide and fix an objective optical system for imaging an examination site in a body cavity.
A light guide hole 13 that guides and fixes a light guide for guiding light to a, an air tube hole 14 that guides and fixes an air tube for sending gas, and a water tube hole that guides and fixes a water tube for sending water. 15. A forceps hole 16 is drilled to guide a forceps channel for guiding the processing tool to the forceps port 16a. Light guide hole 1
3 may be provided in plural on the head portion.

Furthermore, a cap-shaped head cover 20 for protecting the inside of the body cavity is attached to the head portion 10, and this head cover 20 is molded from a non-conductive material such as a synthetic resin material or an insulating material. The head cover 20 also includes a guide sleeve 11, a light guide hole 13, an air supply tube hole 14 in the head portion 10, as shown in FIGS.
, a sleeve hole 21, a light sleeve 23, an air supply sleeve 24, a water supply sleeve 25, and a forceps sleeve 26, which communicate with the water supply tube hole 15 and the forceps hole 16, respectively.
are integrally formed. When the head cover 20 is attached to the head part 10, the guide sleeve 11 is inserted into the space formed by the light sleeve 23, the air supply sleeve 24, the water supply sleeve 25, and the forceps sleeve 26, so that the head cover 20 is inserted. Fixed.

As described above, the head section 10 fixes the objective optical system, which requires high mounting accuracy, to the guide sleeve 11, and also fixes the objective optical system, which requires high mounting accuracy, to the guide sleeve 11, and fixes the other channels such as the light guide, air supply tube,
Head cover 20 for water tube and forceps channel
A light sleeve 23 and an air supply sleeve 24 integrally formed with the
, a water supply sleeve 25, and a forceps sleeve 26 to communicate with the head portion 10 side. Therefore, it is no longer necessary to form an outer peripheral wall on the head section 10 to guide and fix the channel, and the diameter of the head section 10 can be reduced accordingly.

In the above configuration, when observing the inside of the body cavity of a subject, the operator introduces the guiding tube 2 into the body cavity and then performs an angle operation using the operation section 3 to place the head near the examination site. 1. Position the section 10. Then, as shown in FIG. 5, light is irradiated onto the inspection site from the illumination window 13a, and the light image passes through the observation window 11a and enters the imaging section 17 consisting of the objective optical system and CCD. This imaging section 17 sends a video signal to the device main body 5 through a signal line, and the device main body 5 displays an image constructed based on this video signal, and the operator observes this displayed image.

FIG. 6 shows a second embodiment of the present invention, and the same or corresponding parts as in the first embodiment will be described with the same reference numerals. In this embodiment, the light guide hole 13, the air tube hole 14, the water tube hole 15, and the forceps hole 16 are partially cut out in the head section 10. covered. The air supply tube, the water supply tube, the light guide, and the forceps channel, which are channels other than the objective optical system, are guided and fixed by fitting the head cover 20 to the head section 10. In this case, the head cover 20 does not require 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 it is sufficient to simply provide holes in each of them.

As described above, according to this embodiment, since there is no need to form sleeves on each of the head covers 20, the structure can be simplified. The other configurations and operations are the same as those of the first embodiment, so their explanation will be omitted.

In the above embodiment, the present invention is applied to a forward-viewing endoscope, but it can also be applied to a side-viewing endoscope.

[0019]

[Effects of the Invention] As explained above, according to the present invention,
A guide sleeve is formed on the head part, and the objective optical system for imaging the inspection area is guided and fixed by this guide sleeve, and other channels are provided on the head cover side, so that an outer peripheral wall can be formed on the head part. disappears. Therefore, the diameter of the head portion can be reduced. Further, since machining for forming the outer peripheral wall is not required, workability is significantly improved and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a head section 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 the line II-II in FIG. 1;

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

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

FIG. 5 is an enlarged perspective view showing the tip of the guiding tube in FIG. 4;

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

[Explanation of symbols]

1 Endoscope device 2. Conduit pipe 10 Head part 11 Guide sleeve 20 Head cover.

Claims (1)

[Claims] Claim 1. An endoscope device in which a head is provided at the distal end of a guiding tube introduced into a body cavity, and a head cover is fitted to the head, wherein a guide sleeve is formed in the head, and the guide sleeve is provided with a head cover. An endoscope apparatus characterized in that an objective optical system for imaging an examination site is guided and fixed to the head cover, and other channels are guided and fixed partially or entirely to the head cover.