JPS5921770Y2 - Endoscope with tip camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an endoscope with a camera at the distal end, which is used by incorporating a photographing device section at the distal end of the insertion section and loading film into the photographing device section.

In order to obtain particularly good photographs of the inside of a body cavity using an endoscope, it is desirable to incorporate a photographing device into the tip of the insertion section of the endoscope, load film into this photographic device, and take photographs. .

However, the tip of the endoscope's insertion section is very small in order to facilitate insertion into the body cavity, so the material of its component parts is thin but strong and corrosion-resistant. High quality stainless steel material is also used.

However, when stainless steel material is thin, it is relatively easy for X-rays to pass through it, exposing the film housed in the imaging device, causing a so-called fogging phenomenon, which causes the film to become illegible. .

By the way, because it is difficult to insert an endoscope into the colon, the insertion operation is usually performed under X-ray fluoroscopy. Rarely used for some reason.

The present invention was developed in light of the above circumstances, and its purpose is to protect the film stored at the tip of the insertion tube from X-rays and to prevent it from being exposed to the fogging phenomenon caused by X-rays. The goal is to provide a scope.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 in FIG. 1 is an insertion section of the endoscope, and a distal end component 2 is provided at the distal end of the endoscope.

This distal end component 2 has a photographing window 5 on the distal end surface 4 of its main body 3.
, an observation window 6 and an illumination window (not shown) are provided, and a photographing optical system 7 is installed inside the photographing window 5, and constitutes a photographing device section 9 together with a cassette storage chamber 8 to be described later.

An observation optical system 10 is installed inside the observation window 6, and this observation optical system 10 allows the image transmission optical fiber bundle 1 to be
The observation field inside the body cavity is imaged on the distal end surface 12 of the body cavity.

Further, the tip of the illumination optical fiber bundle 13 is opposed to the inside of the illumination window.

The image transmission optical fiber bundle 11 and the illumination optical fiber bundle 13 are each led to the proximal side of the endoscope through the insertion section 1.

The cassette storage chamber 8 is installed behind the photographic optical system 7, and allows the film cassette 14 to be inserted and loaded through an opening 8a provided on the side surface of the main body 3.

That is, the opening 8a of the cassette storage chamber 8 is closed by fitting the hood 15 onto the main body 3 of the tip component 2.

Further, the film cassette 14 has a cassette main body 16
A supply shaft 18 and a take-up shaft 19 for the film 17 are provided inside the cassette, and one end of the take-up shaft 19 protrudes from the cassette body 16, to which a take-up pulley 20 is attached.

A hoisting wire 21 is attached to the hoisting pulley 20.
The tip of the winding wire 21 is wound around the winding wire 21.
The rear end side is guided through a wire guide 22 in the insertion section 1 to the hand handling section of the endoscope.

By pulling this winding wire 21, the winding shaft 19 is rotated and the film 17 is wound up.

On the other hand, the main body of the hood 15 is formed into a substantially cylindrical shape, and is formed to fit over the entire length of the main body 3 of the distal end component 2.

Further, a threaded portion 23 is formed on the inner surface of the distal end portion of the hood 15, and is adapted to be screwed into the main body 3 of the distal end component portion 2.

That is, the hood 15 is detachably attached to the main body 3 of the tip component 2.

As described above, when attaching and detaching the film cassette 14, the hood 15 is removed to open the cassette storage chamber 8.

Further, an X-ray blocking member 25 is fitted into the inner surface of the hood 15, which is entirely cylindrical except for the threaded portion 23 and a small portion 24 on the inner surface of the rear end.

The material of this X-ray blocking member 25 does not allow X-rays to pass through it easily.

For example, it is made of lead or cerium.

However, since such materials generally have low mechanical strength, the inner surface of the X-ray blocking section 25 is covered with a thin, cylindrical protection member 26 made of stainless steel.

According to the embodiment described above, since the imaging device section 9 is covered with the X-ray blocking member 25, even when the insertion section 1 of the endoscope is inserted into a body cavity and viewed through X-rays. The film 17 in the film cassette 14 is not irradiated with X-rays.

Note that no X-ray blocking members are particularly placed at both the front and rear ends of the distal end component 2, but in normal endoscopy, it is extremely rare for X-rays to enter from that direction, and other Since there are structural members, even if the incident occurs, the film 1
When it reaches 7, it becomes extremely weak and poses no practical problem.

Further, in the above embodiment, photography is performed by blinking the light sent into the body cavity through the illumination optical fiber bundle 13 by an operation on the hand side.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be, for example, those shown in FIGS. 3 to 5, respectively.

That is, in the case shown in FIG. 3, a relatively thin X-ray blocking member 27 is coated on the circumferential surface of the main body 3 of the distal end component 2 except for the opening side of the cassette storage chamber 8, and the X-ray shielding member 27 is further provided opposite to the cassette storage chamber 8. A relatively thick X-ray blocking member 28 is detachably coated on the peripheral surface portion.

Further, the outer surface of each of the X-ray blocking members 27, 28 is covered with a thin protective member 29, 30 made of stainless steel.

The reason why the X-ray blocking member 27 on the side of the tip component 2 is made relatively thin is because the member of the tip component 2 itself has the effect of blocking X-rays to a certain extent, so the thickness was set accordingly. This is due to a number of reasons.

The embodiment shown in FIG.
A radiation blocking member 31, 32 is provided, and each X-ray blocking member 3
The outer surface of 1.32 is covered with a thin stainless steel protective member 33.
It is covered with 34.

Note that the X-ray blocking member 32 on the hood 15 side
is positioned in advance so as to face the cassette storage chamber 8 when screwed in to a predetermined position.

In the embodiment shown in FIG. 5, an X-ray blocking member 35 is embedded within the thickness of the hood 15.

For example, when the hood 15 is molded from a synthetic resin, it is preferable to mix lead powder into the synthetic resin as the X-ray blocking member 35 and mold them integrally.

As explained above, the present invention provides an endoscope with a distal camera that incorporates a photographing device section at the distal end of the insertion section and takes photographs by loading film into the photographing device section. An X-ray blocking member is arranged so that the film is surrounded by the X-ray blocking member.

Therefore, when guiding the insertion part of the endoscope into the body cavity,
Even when viewed through X-rays, the film is not exposed to X-rays.

In other words, since the film is protected from exposure to X-rays, good photographs without fogging can be obtained.

Therefore, the photographed film can be easily read and accurate diagnosis can be made.

Further, according to the present invention, an endoscope with a camera at the tip can be guided to an examination site under X-ray fluoroscopy.

Therefore, an endoscope with a tip camera can be used for colon examinations that could not be guided under X-ray fluoroscopy, and it is possible to obtain good photographs, which is a feature of photography with an endoscope with a tip camera. can.

Furthermore, since an X-ray blocking member is provided at the tip of the insertion tube, the shadow of the X-ray blocking member can be observed under X-ray fluoroscopy.
The position of the tip of the insertion tube can be clearly known.

That is, the insertion section can be guided easily and safely, and a rapid examination can be performed.

Furthermore, since the X-ray blocking member at least at the opening of the cassette storage chamber is made removable in accordance with the attachment and detachment of the hood, the structure is simple and it is very easy to see through the film.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the tip of the insertion section of one embodiment of the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Figs. 3 to 5 are respectively different embodiments. FIG. 1... Insertion section, 9... Imaging device section, 2
5, 27, 28, 31. 32.35...X-ray blocking member.

Claims (3)

[Scope of utility model registration request] (1) In an endoscope with a distal end camera equipped with an imaging device section having a cassette storage chamber formed by drilling into the side circumference of the distal end of the insertion section, a hood and a hood removably provided at the distal end of the insertion section are provided. , an X-ray blocking member provided around the entire periphery of the cassette storage chamber, and at least a portion of the X-ray blocking member located at the opening of the cassette storage chamber is removable in accordance with attachment and detachment of the hood. An endoscope with a camera at the tip. (2) The endoscope with a distal end camera according to claim 1, wherein the X-ray blocking member is provided integrally with the hood. (3) The X-ray blocking member is provided on an opening/closing lid that is removably provided at the opening of the cassette storage chamber, and is removably fixed to the tip of the insertion section in accordance with the attachment and detachment of the hood. An endoscope with a camera at the tip according to claim 1 of the registered utility model.