JPS5931213Y2 - Film cassette loading device for side-viewing tip camera endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film cassette mounting device for a side-viewing end camera type endoscope, which has an improved means for fixing a film cassette in an endoscope equipped with a front end camera.

Conventionally, in an endoscope equipped with a distal camera, a storage chamber for a film cassette is provided at the distal end of the endoscope. A leaf spring is provided.

Therefore, when the end cap is removed and the film cassette is taken out or put into the storage chamber, the plastic film cassette is scraped and scrapes are generated because the film cassette is pressed firmly against the leaf spring.

The shavings may adhere to the lens surface or film surface as dust, adversely affecting photography and complicating diagnosis.

Furthermore, since such defects are only noticed after the film is developed, the test may sometimes have to be repeated, which may place additional burdens on the patient and the testing technician.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to prevent shavings from being scraped against the elastic member and the walls of the storage chamber when the film cassette is put in and taken out of the storage chamber. It is an object of the present invention to provide a film cassette mounting device for an endoscope that prevents the film from being damaged.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

What is shown in FIG. 1 is a film cassette A consisting of a main body 1 made of synthetic resin, and the main body 1 consists of a bottom case 2 and a lid case 3.

As shown in FIG. 2, a film storage chamber 4 and an exposure chamber 5 are provided inside this chamber.

The film storage chamber 40 portion is formed wider than the exposure chamber 50 portion, and an exposure window 6 is formed in the exposure chamber 50 portion.

Further, a film 7 is wound into the film storage chamber 4, and a winding shaft 8 is provided adjacent to the film 7.

The winding shaft 8 is connected to a pulley 9 attached to the side wall of the main body 1 so as to be exposed, and a cable 10 for film winding is wound around the pulley 9 in multiple layers, and the cable 10 is used for operations (not shown). It is designed to connect wires.

By pulling the operation wire at the operation section on the proximal side of the endoscope, the cable 10 is pulled, the winding shaft 8 is rotated together with the pulley 9, and the film 7 is wound up.

A connector (not shown) is attached to the tip of the cable 10, so that the operating wire can be detachably connected.

Further, a light shielding material 12 is installed inside the exposure window 6, and the film 7 is guided between the light shielding material 12 and the exposure window 60.

On the other hand, FIG. 2 shows the distal end component 14 of the endoscope insertion section 13, in which a storage chamber 15 for the film cassette A is formed.

The film cassette A is formed in a shape that can be inserted with the exposure chamber 5 side portion at the back, and the film storage chamber 4 side portion of the film cassette A is inserted into the storage chamber 15.
It is designed to be stored so that it slightly protrudes from the opening.

Further, a tip cap 16 is detachably attached to the tip of the tip component 14.

That is, the tip cap 16 has a structure in which it is screwed into and engaged with a threaded portion 17 formed on the inner surface of the opening of the storage chamber 15.

Furthermore, inside the storage chamber 15, there is an inserted film cassette).
An elastic member, such as a leaf spring 18, is installed to press the exposure window 6 side portion of A against the positioning side wall surface of the storage chamber 15 for positioning.

The leaf spring 18 is installed along the front-rear direction, and its inner end is fixed to the inner wall surface of the storage chamber 15, and its tip end is free.

Further, the tip end 19 of the plate spring 18 extends long enough to reach the threaded portion 17, and is configured to be pushed into the housing by a tip cap 16 screwed into the threaded portion 17.

That is, when the tip cap 16 is removed, the leaf spring 1
8 does not swell along the inner wall surface of the storage chamber 15, but when the tip cap 16 is attached, the leaf spring 18
By pushing in the tip of the film cassette A, the middle part will bulge out and the surface of the film cassette A on the exposure window 6 side will be placed in the storage chamber 1.
It is pressed against the positioning side wall surface of No.5.

Note that the exposure window 6 of the film cassette A in the installed state
A photographing optical system 20 is installed at a position facing the photographing optical system 20, and the tip component 14 is further provided with an illumination window 22 in addition to a photographing window 21 corresponding to the photographing optical system 20. .

Further, the photographing window 21 also serves as an observation window, and therefore a prism 23 for light division is installed inside the photographing window 21, and an objective lens 24 is connected through the prism 23. .

The front end surface of the image guide 25 is located at the imaging position of the objective lens 24.

In the structure of the above embodiment, the operation of attaching and detaching the film cassette A is carried out as follows.

First, as shown in FIG. 3, after the tip cap 19 is removed, the film cassette A is inserted into the storage chamber 15 from the exposure chamber 5 side.

At this time, the leaf spring 18 is fully extended and does not protrude along the inner wall surface of the storage chamber 15, thus forming an insertion space into which the film cassette A can be inserted.

Therefore, the film cassette A can be inserted loosely without being pressed against the leaf spring 18.

The film cassette A has a plate 18 and a storage chamber 15.
It can be easily inserted into the inner wall without rubbing too hard.

Further, since the main body 1 of the film cassette A made of synthetic resin is not strongly rubbed, no shavings are generated.

Next, after inserting the film cassette A, the tip cap 16 is screwed in as shown in FIG. The middle portion of the leaf spring 18 bulges toward the film cassette A and presses the film cassette A.

Therefore, the surface of the film cassette A on the exposure window 6 side hits the wall surface of the storage chamber 15 and is positioned.

In addition, when removing the film cassette A, if the tip cap 16 is removed, the leaf spring 18 will stretch and will no longer press the film cassette A, so the film cassette A can be easily pulled out, and the film cassette A can be easily pulled out. There is no risk of shavings coming out.

As explained above, according to the present invention, when a film cassette is taken in and taken out of the storage chamber, it is not rubbed strongly against the elastic member or the wall surface of the storage chamber, so it can be taken in and taken out easily, and no shavings are generated. Therefore, it does not adhere as dust to the lens surface or film surface and interfere with photography.

In particular, defects caused by sanding powder adhering to the lens or film surface as dust not only impede the diagnosis itself, but also require a re-examination because they are only noticed after the film is developed. Situations may also arise.

This kind of situation can place additional burden on patients and laboratory technicians, and this invention can prevent this situation from occurring.
It has exceptional effects as an endoscope.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of a film cassette, Fig. 2 is a sectional view of the distal end of the endoscope insertion section, and Fig. 3 is the same distal end with the distal end cap removed. FIG. A: Film cassette, 1: Main body, 4: Film storage chamber, 5: Exposure chamber, 6: Exposure window, 7...Film,
13...Endoscope insertion section, 14...Tip component, 15...Storage chamber, 16...Tip cap, 17...・Threaded part, 18...
・Plate spring, 19...Tip, 20...
Photographing optical system, 21... Photographing window.

Claims (1)

[Scope of utility model registration request] In a film cassette loading device for a side-viewing tip camera type endoscope, which has a film cassette storage chamber at the end of the endoscope and a cap that can be detachably attached by screwing into the opening of the storage chamber, the storage chamber An elastic member is provided along the front and back direction of the storage chamber to press and position the exposure window side portion of the film cassette to be inserted into the storage chamber against the positioning side wall surface of the storage chamber, and one end of this elastic member is attached to the deep part of the storage chamber. , the other end is free, and when the cap is removed, this other end is located on the opening side outside the screwed end surface of the cap, and the elastic member expands when the cap is removed. This creates an insertion space for the film cassette, and
A film cassette mounting device for a side-viewing end camera type endoscope, characterized in that when the cap is attached, the cap deforms toward the film cassette and presses and fixes the film cassette.