JPH0712101U - Endoscope - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a blood vessel endoscope that can secure a ventilation path to a balloon with a simple configuration. [Structure] A bending tube 3 is airtightly attached between a ring 1 and a protective tube 4 to form a closed tube, and an image guide, a bending wire, and the like (not shown) are housed inside. An outer tube 5 is provided on the outer periphery of the protective tube 4 so as to secure a ventilation space, and the tip end portion thereof is fixed on the protective tube 4 with an adhesive so as to form a ventilation hole. The balloon 6 is airtightly attached around the ring 1 and around the tip of the outer tube 5. The air sent through the ventilation space between the exterior tube 5 and the protective tube 4 is supplied to the inside of the balloon 6 from the ventilation hole, and the balloon 6 can be inflated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an endoscope used for medical and industrial purposes, and more particularly to an endoscope including a balloon in which an image guide and a light guide are extremely thin like a blood vessel endoscope. .

[0002]

[Prior art]

 An endoscope has an image guide that transmits an image and a light guide that transmits illumination light as basic components, and moves in and out biopsy forceps, a channel pipe for sending or sucking air or water, and a tip part. A curved wire for the purpose is incorporated.

An endoscope, such as a blood vessel endoscope, which is applied in a pipe through which a liquid flows, has a balloon attached near the tip end thereof in order to stop the flow, and air is blown into the balloon to make it adhere to the inner wall of the pipe. It is common to stop the flow of liquid and make observations. Furthermore, in the case of a blood vessel endoscope, observation is performed while injecting physiological saline into the blood vessel through the channel pipe.

As described above, in the case of an endoscope having a balloon, it is necessary to send air to the balloon from the body device side. As a method of sending air to the balloon, the balloon attachment part is attached to a cylinder made of SUS, the pipe for ventilation to the balloon is passed through the inside of the exterior pipe, and the tip of the pipe is made of SUS using a cylinder at a predetermined position. Welding and fixing from the inside of the hole opened on the side, and sending air to the balloon. A method in which the inside of the exterior pipe is used as a ventilation hole for the balloon, and the bending wire, which is the moving part, is covered with a resin pipe to keep it airtight. Was taken.

However, the method (1) has a problem that it is difficult to weld the ultrafine ventilation pipe and the SUS cylinder, and the mass productivity is poor. In addition, the method (1) has a problem in that it is difficult to pass the bending wire using SUS through the resin pipe, and since the bending wire is covered with the resin pipe, the entire outer diameter becomes large.

[0006]

[Problems to be solved by the device]

 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to realize an endoscope capable of ensuring a ventilation path to a balloon with a simple configuration.

[0007]

[Means for Solving the Problems]

 The present invention relates to an endoscope having a balloon in which at least an image guide, a light guide and a bending wire are housed in a protective tube, and a tube is provided outside the protective tube, and a tube is provided between the protective tube and the tube. It is characterized by being a ventilation space for the balloon.

[0008]

[Action]

 By providing a ventilation space between the protective tube and the tube outside the balloon by ensuring a ventilation path to the balloon, a portion unrelated to the bending wire can be used as the ventilation path, and good airtightness is obtained. The endoscope can be constructed with a simple structure.

[0009]

【Example】

 1 is a cross-sectional view of the vicinity of the distal end of an embodiment of the endoscope of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. In the figure, 1 is a ring, 2 is a buckling prevention rod, 3 is a curved tube, 4 is a protective tube, 5 is an outer tube, 6 is a balloon, 7 is an adhesive, and 8 is a ventilation hole. The ring 1 and the protective tube 4 at the distal end portion are arranged with a space therebetween, and the curved tube 3 is provided between them. Both ends of the curved tube 3 are adhered to the inside of the ring 1 and the protective tube 4, and the ring 1, the curved tube 3 and the protective tube 4 constitute a closed tube. Image guides, light guides, channel pipes, bending wires, etc. are housed in these sealed tubes, but they are not shown. As the ring 1, SUS was used. As the protective tube 4, a SUS tube is used in order to have an appropriate waist strength, but a material having an appropriate rigidity can be used. Although a polyimide tube is used for the curved tube 3, other flexible materials can be used. In order to prevent buckling of the bending tube 3 when the ring 1 is bent with respect to the protection tube 4 by operating the bending wire, buckling prevention bars 2 are provided on both side surfaces of the bending tube 3. Although the buckling prevention rod 2 is also made of a rigid material, a SUS rod is used in this embodiment. The buckling prevention rod 2 is fixed so as to connect the ring 1 and the protection tube 4, but the line connecting the two bending wires is placed in a positional relationship that is perpendicular to the line connecting the two bending wires. It is attached.

An outer tube 5 is provided on the outer circumference of the protective tube 4. The outer tube 5 is made of a resin pipe and is provided with a space so as to secure a ventilation space between the outer tube 5 and the protective tube 4. The tip portion is fixed on the protective tube 4 with an adhesive, and as shown in FIG. 2, a vent hole 8 is formed. A protective layer or a protective pipe may be further provided on the outer circumference of the outer tube 5.

The balloon 6 is airtightly attached around the ring 1 and around the tip of the outer tube 5. Therefore, the air sent through the ventilation space between the exterior tube 5 and the protective tube 4 is supplied to the inside of the balloon 6 from the ventilation hole 8 and the balloon 6 can be inflated. As described above, the ring 1, the curved tube 3, and the protective tube 4 form a closed tube, and the air passage is formed outside the closed tube to the balloon 6. It can be separated from the bending wire that is housed in, and can provide good airtightness.

3 to 9 are explanatory views of the manufacturing process of the endoscope of the present invention. In the figure, the same parts as those in FIG. 9 is a dummy rod and 10 is a thread.

First, the tips of the two buckling prevention rods 2 are welded to the opposing positions of the ring 1 (FIG. 3). On the other hand, an image guide, a light guide, a channel pipe, a bending wire, etc. are passed through the bending tube 3, and the bending wire is temporarily fixed to the inner wall of the ring so that it is at a right angle to the positional relationship of the buckling prevention rod 2. Then align the tips and bond them together. The buckling prevention rod 2 of FIG. 3 is welded and fixed to the ring 1, and the ring portion is adhesively fixed (FIG. 4). The image guide, light guide, channel pipe, bending wire, etc. are not shown.

An image guide, a light guide, a channel pipe, a bending wire, etc. are passed through the protection tube 4, and the bending tube 3 is superposed on the inner surface of the protection tube 4 for about 10 mm and fixed by adhesion to prevent buckling. 2 is adhered to the outside of the protective tube 4 (FIG. 5).

Next, the protective tube 4 is covered with the exterior tube 5. The tip of the outer tube 5 may be positioned at the same extent as the tip of the protective tube 4, but may be positioned so as to protrude to the curved tube 3 side. In this example, a heat-shrinkable tube was used as the outer tube 5. An appropriate number of dummy rods 9 are sandwiched between the protective tube 4 and the exterior tube 5 (FIG. 6). The dummy rod 9 is made of a material that is difficult to adhere to the adhesive, such as Teflon rod.

The inside of the tip portion of the outer tube 5 is filled with an adhesive, and the outer tube 5 is adhesively fixed. At this time, heat is applied to the tip of the outer tube 5 to shrink it (FIG. 7). Thereby, the adhesiveness with the adhesive becomes good. When a heat shrinkable tube is not used as the outer tube 5, the step of causing heat shrinkage is unnecessary. After completion of the adhesive fixing, the dummy rod 9 is pulled out (FIG. 8). By extracting the dummy rod 9, the ventilation hole 8 of FIG. 2 is formed.

Finally, a rubber pipe is covered as the balloon 6 so as to cover the entire portion of the curved tube 3, both ends are fixed with a resin thread 10 and fixed with an adhesive (FIG. 9). As can be seen from the above steps, since it is not necessary to cover the bending wire with a pipe, the working time can be shortened and an endoscope having a small diameter can be obtained. In addition, the welding work can be done independently of a very limited part to improve workability and the assembly work is easy.

[0018]

[Effect of device]

 As is clear from the above description, according to the present invention, the structure is simple by providing the ventilation path to the balloon by providing the ventilation space between the protection tube and the tube outside thereof. There is an effect that an endoscope with good airtightness can be constructed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the vicinity of the distal end portion of an embodiment of the endoscope of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a manufacturing process of the endoscope according to the embodiment of the present invention.

FIG. 9 is an explanatory view of the manufacturing process of the endoscope of the embodiment of the present invention.

[Explanation of symbols]

 1 Ring 2 Buckling Prevention Rod 3 Curved Tube 4 Protective Tube 5 Exterior Tube 6 Balloon 7 Adhesive 8 Vent Hole 9 Dummy Rod 10 Thread

Claims (1)

[Scope of utility model registration request] 1. At least an image guide in the protective tube,
In an endoscope having a balloon accommodating a light guide and a bending wire, a tube is provided outside the protective tube, and a space between the protective tube and the tube serves as a ventilation space for the balloon. An endoscope that does.