JPS6050455B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope that is inserted into a body cavity and incorporates a photographing device for photographing a lesion or the like.

An endoscope that incorporates a photographing device such as a gastro camera, in which a film cassette is loaded into the head body provided at the tip of the flexible tube, and the film is wound to a predetermined length for each exposure. It has been known.

This film cassette for an endoscope has a feed-out shaft and a take-up shaft spaced apart from each other in the cassette, a film passage formed between them, and a film exposure section. This film cassette is loaded into the cassette storage section provided in the main body of the head, but since an outer cylinder is fitted on the outside of the main body of the head, when the film cassette is attached or removed, the outer cylinder is inserted into the head. It is necessary to remove it from the main body,
It was extremely difficult to replace film cassettes. In addition, if the outer cylinder is pulled out when installing or removing a film cassette, mechanisms other than the cassette storage part, such as the photographing optical system and the illumination optical system, may be exposed, and dust may adhere to them, which is an inconvenience that may adversely affect each mechanism. There is. This invention has been made based on the above circumstances, and its object is to provide a film cassette loading opening on the side wall of the head body, and to provide a film cassette loading opening in the loading opening with an opening/closing lid.
It is an object of the present invention to provide an endoscope in which the operation of attaching and detaching a lumen cassette can be performed extremely easily and without adversely affecting each mechanism.

The present invention will be described below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 denotes a flexible tube of an endoscope, and the flexible tube 1 has a connecting ring body 2 at its distal end, which has a fitting part 2a with a conical inner circumferential surface.
The head main body 3 is integrally fixed via. The head main body 3 has a cylindrical shape, and a bottomed cylindrical tube 4 is fitted on the outside thereof, and an outer tube 5 is fitted on the outer peripheral surface of the cylindrical tube 4. Further, a cassette storage chamber 6 consisting of a rectangular recess is provided in a part of the side wall of the head body 3, and a reel storage chamber 7 is cut out in the bottom of the cassette storage chamber 6. A film cassette 8, which will be described later, is removably loaded in the cassette storage chamber 6, and a reel 9 provided on the film cassette 8 is stored in the reel storage chamber 7 when the film cassette 8 is loaded. That is, the main body 10 of the film cassette 8 is formed of a synthetic resin material into a substantially rectangular shape, and has a feeding section 12 on one side of which the film 11 is wound, and a winding shaft 13 on the other side. A winding section 14 is provided, and a light plate 16 for guiding the film 11 to an exposure section 15 is provided on the feeding section 12 side within the main body 10. Further, one end portion of the winding shaft 13 penetrates the main body 10 and projects to the outside, and a reel 9 on which the operating yarn 17 is wound is integrally provided on this projecting portion. The end of the operating thread 17 is hooked onto an operating wire 18 that passes through the flexible tube 1 and connects to an operating section (not shown). Further, on the distal end side of the head body 3, photographing optical systems 19, 52, 51, 24, observation optical systems 20, 50, 51, and two illumination optical systems 26 are arranged, and the photographing optical system The systems 19, 52, 51, and 24 face the exposure section 15 of the film cassette 8, and the observation optical systems 20, 50, 51, and 24, and the illumination optical system 26 penetrate the head body 3 and the flexible tube 1, respectively. optical fiber bundle 22
, 33, and illuminates the inside of the body cavity for photographing and observation. Furthermore, a male thread 27 is cut into the outer circumferential wall of the front end of the cylindrical tube 4 fitted into the head body 3, and a tightening member 29 is attached to the outer circumferential surface of the cylindrical tube 4. A screw 30 is screwed on. An annular fitting part 31 having a hollow inner peripheral surface is integrally formed at the rear end of this tightening member 29, and this fitting part 31 is connected to the fitting part 2a of the connecting ring body 2. is facing. moreover,
The opening of the cassette storage chamber 6 located between the connection ring 2 and the tightening member 29 is formed as a loading port 32 for the film cassette 8. An opening/closing lid 33 is removably attached and is curved along the . A packing 34 made of a soft elastic material such as rubber is attached to the joint 33a on the inner surface of the periphery of the opening/closing lid 33. Slanted surfaces 35, 35 are provided on the outer surfaces of both ends to match the inner surfaces of the fitting portions 2a and 31 of the connecting ring body 2 and the tightening member 29, respectively. When the opening/closing lid 33 is attached, the inner surface of the packing 34 is fluid-tightly joined to the lip of the loading port 32, and the inclined surfaces 35, . 3
5 is in close contact with the inner surfaces of the fitting portions 2a and 31. When in use, the endoscope is inserted into the body cavity through the head body 3, and the light beam transmitted by the light source device provided outside the endoscope through the optical fiber bundle 23 is transmitted to the illumination optical system. 26
The interior of the body cavity can be illuminated through it, making observation and photography possible.

After exposing the film 11 facing the exposure section 15 in this way, by pulling the operation wire 18 at the operation section of the endoscope, the reel 9 is rotated via the operation thread 17, and the exposed film 11 is rotated through the operation thread 17. The unexposed film 11 can be taken up on the take-up shaft 13 and guided to the exposure section 15. Also,
When a predetermined number of images have been taken and the film cassette 8 is to be taken out, the head body 3 is pulled out of the body cavity through the flexible tube 1 of the endoscope, and when the mass hood 28 is rotated, the tightening member integrated therewith is removed. In the relationship between the female thread 30 of 29 and the male thread 27,
The hood 28 and the tightening member 29 gradually move toward the distal end side of the head body 3. Then, when the tightening member 29 reaches a predetermined position, the fitting portion 31 is removed from the inclined surface 35 of the opening/closing lid 33. Therefore, one end side of this opening/closing lid 33, that is, the fitting part 31
By lifting the fitted part outward as shown by the arrow and then pulling it towards the front of the head main body 3, the inclined surface 35 on the other end side is pulled out from the fitting part 2a of the connecting ring body 2 and loaded. The mouth 32 can be opened. Therefore, the film cassette 8 in the cassette storage chamber 6 can be taken out from the loading port 32. In this case, film cassette 8
The integral reel 9 is also pulled out from the reel storage chamber 7, and the operating wire 18 is also pulled out via the operating thread 17, but they can be separated by removing the joint between the operating thread 17 and the operating wire 18. Furthermore, when loading the film cassette 8, the film cassette 8 is stored in the cassette storage chamber 6 through the loading port 32, and the end of the operating thread 17 wound around the reel 9 is connected to the operating wire 1.
Hook it on 8.

Next, position the opening/closing lid 33 in the loading opening 32, inserting one end of the opening/closing lid 33 into the fitting part 2a of the connecting ring body 2 in the opposite direction of the arrow direction at the time of opening mentioned above, and insert the other end into the loading opening. 32
Attaches to the rim of the mouth. When the hood 28 is rotated in this state, the tightening member 29 will tighten due to the relationship between the female thread 30 and the male thread 27.
The hood 28 and the tightening member 29 gradually move toward the rear end of the head body 3. Therefore, the fitting part 31 joins with the inclined surface 35 of the opening/closing lid 33, and the opening/closing lid 33 is pressed toward the connecting ring body 2 and is also connected to the head main body 3 via the packing 34.
The opening/closing lid 33 allows the loading port 32 to be mounted in a liquid-tight manner. In the above-mentioned embodiment, the opening/closing lid is configured to be detachable from the head body, but the invention is not limited to this, and the opening/closing lid may be rotatably attached using a hinge or the like. And the mounting structure thereof is not limited.

As explained above, this invention has a film cassette loading port on the side wall of the endoscope and an opening/closing lid for this loading port, making it extremely easy to attach and remove the film cassette. Since there is no need to expose the photographing optical system, illumination optical system, etc. when replacing the cassette, there is an effect that these mechanisms will not be adversely affected.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of the endoscope head, FIG. 2 is a longitudinal sectional view taken along the line FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 1, and FIG. 4 is an exploded perspective view of the head of the endoscope. 3...Head body, 8...Film cassette, 32.
... Loading port, 33... Opening/closing lid.

Claims (1)

[Claims] 1. In an endoscope in which a film cassette is removably loaded in the head body, a loading opening consisting of a concave portion in which the long axis of the rectangular film cassette can be accommodated is provided in the side wall of the head body along the optical axis direction. An endoscope characterized in that the loading port is provided with an opening/closing lid.