JPH0349727A - Endoscope - Google Patents

Abstract

PURPOSE:To easily replace the parts even when a guide fiber and a tube are damaged by forming integrally a light guide and the tip part of a forceps channel tube and sticking them to a tip part main body with an adhesive. CONSTITUTION:On the tip part main body 17 of an endoscope, a through-hole 18 for light guide and a through-hole 19 for observation are provided, and a forming part 28 constituted of a forceps channel tube 27 and a light guide 31 is inserted through the through-hole 18 for light guide. The tip surface of this forming part 28 is fixed at the tip part main body 17 with the adhesive 29 having elasticity, for instance, of a silicone compound while keeping watertightness so that it becomes almost the same surface as the tip surface of the tip part main body 17. In such a manner, in the case of replacing the light guide 31 and the forceps channel tube 27 for the purpose of repair, the forceps channel tube 27 and the light guide 31 can be pulled out easily from an operating part by cutting the part of the adhesive 29 and removing the forming part 28 from the tip part body 17, and the repair can be executed in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an endoscope having an objective optical system, a light guide fiber, and a forceps channel tube in the tip body.

[Prior art and problems to be solved by the invention] Conventional endoscopes, especially the tip end of a bronchial endoscope, were developed in U.S. Pat.
As shown in Japanese Patent Application No. 0003, an image carrier unit, a light guide fiber, and tubes are slidably fixed to a hole or a cap provided in the tip body. For this reason, if the light guide fiber or tube is damaged, it is not possible to replace only the damaged parts, and the entire insertion section must be discarded and replaced with a new insertion section, making repair work difficult and difficult. Repair costs were also high because solid-state image sensors and other components had to be discarded.

There is also a repair method in which the tip part is removed from the curved part of the insertion tube and the flexible part (flexible tube) along with the built-in parts to replace the Dave 1-wave or light guide fiber, but in such a case, the tip body and the curved part are separated It is necessary to removably fix it with screws etc. in advance so that it can be removed, and the diameter of the tip becomes larger by that space. Since pipes and flexible parts are not usually reused, repair costs are high.

The present invention has been developed in view of the above circumstances, and allows for easy parts replacement in the event that the light guide fiber or tube breaks without increasing the diameter of the tip of the endoscope. An object of the present invention is to provide an endoscope that can perform the following operations and can reduce the repair cost to -6.

[Means and effects for solving the problems] In the endoscope of the present invention, the distal end of the light guide fiber and the distal end of the forceps channel tube are integrally molded, and are fixed to the distal end body with an elastic adhesive. This is what I did.

In the present invention, a light guide fiber and a forceps channel tube with an integrated distal end are fixed to the distal end main body using an elastic adhesive. When replacing the light guide fiber and the forceps channel tube, the light guide fiber and forceps channel tube are fixed with adhesive and removed from the tread portion.

[Embodiment 1] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

Figures 1 to 7 relate to one embodiment of the present invention, in which Figure 1 is a front view of the distal end of the endoscope, and Figure 2 is an explanation of the integrated light guide fiber and the distal end of the forceps channel tube. Figure 3 is a longitudinal cross-sectional view of the tip of the endoscope, Figure 4 is a cross-sectional view along the line A-A'' in Figure 3, Figure 5 is a schematic diagram of the endoscope, and Figure 6 is a light guy fiber. FIG. 7 is an explanatory diagram of the case where the light guide fiber and the forceps channel tube are inserted.

In FIG. 5, the endoscope 1 has a large-diameter operating section 2, and an insertion section 3 is connected to the distal end of the operating section 2. As shown in FIG. This insertion section 3 has a distal end section 4, a curved section 6, and a flexible tube 7 connected in this order from the distal end side, and the operating section 2 is connected to the rear end of the flexible tube 7.

The operation section 2 has a grip 8 at the front and an operation section main body 9 at the rear.
have. A universal cord 11 extends from the side of the operation section main body 9, and a connector section 12 is provided at the rear end of the universal cord 11.

The connector portion 12 is provided with a light guide connector 13 and an electrical connector 14. The light guide connector 13 is connected to a light source device (not shown), and the electrical connector 14 is connected to a signal processing device (not shown). It has become.

Furthermore, the grip 8 is provided with a forceps insertion opening 16 into which forceps (not shown) can be inserted.

In FIG. 3, the distal end 4 has a cylindrical and hard distal end main body 17, and the distal end main body 17 has a light guide through hole 7L18 and an observation through hole 19 in the longitudinal direction of the insertion section 3. is provided.

An objective optical system 21 is glued and fixed in a watertight manner to the front part of the above-mentioned 1m through hole 19, and a solid-state image carrier 22 is mounted behind the objective optical system 21 to capture the image of the subject. It is set up to form an image. External leads 23, 23, .
There are multiple signal lines 2 in this external lead 23, 23,...
4,24. ...is soldered. These outer leads 23, 23. ... and signal line 24.24. The connecting parts of . ... is fixed inside the unit.

The light guide through hole 18 is formed to have a substantially elliptical cross-sectional shape as shown in FIG. In this light guide through hole 18, as shown in FIG.
is inserted. This molded part 28 is designed so that the light guide 31 surrounds the tip of the forceps channel tube 27, and is integrally bonded into a substantially oval shape that can be fitted into the light guide through hole 18. Fixed. The distal end surface of the molded part 28 is made flat by 1ft polishing, and is attached to the distal end main body 17 with an adhesive 29 made of silicone, for example, to increase its elasticity so that it becomes almost the same plane as the distal end surface of the distal end main body 17. Fixed and watertight.

Note that the distal end surface of the molded portion 28 does not necessarily have to be polished into a flat surface, but may be a gently curved surface from the outer periphery of the distal end surface of the molded portion 28 of the light guide 31 toward the center of the forceps channel tube 27. By doing this, the wood line end surface of the light guide 31 has an inclination, so the illumination direction changes and a wide light distribution angle can be obtained as a whole.

The forceps channel tube 27 is inserted through the insertion portion 3 and communicates with the forceps insertion port 16. Further, the light guide 31 is bundled into two pieces behind the molded part 28, and the outer periphery is protected by a protective duplex 32. The lie 1-guide 31 protected by this protective duplex 32.
31 reaches the connector section 12 via the insertion section 3 and the universal cord 11, and is connected to the light guide connector 13. Note that the light guides 31 do not necessarily need to be bundled into two, but may be one, or may be three or more in some cases.

A curved portion 6 is formed on the rear end outer peripheral wall of the tip body 17, and rivets 34, 34. A plurality of curved portions 33.33. are rotatably connected to each other. . . The curved portion 36 at the rearmost end is externally fitted and fixed.

Further, the curved portion 33 at the final end is adhesively fixed to the tip of the flexible tube 7. The outer periphery of the curved portions 36, 33, 33°... is covered with a braid 37 braided with thin metal wires,
Furthermore, this outer periphery is coated with an outer skin 38'C-. This outer skin 38 is fixed to the tip main body 17 and the flexible tube 7 in a watertight manner by threads 39, and an adhesive is applied onto the threads 39 to prevent fraying.

In the endoscope configured as described above, a method for replacing the light guide 31 and forceps channel tube 27 will be described below.

First, the forceps channel tube 27 is removed from the forceps insertion port 16, the grip 8 is removed from the operating section 2, and the light guide 31 is removed from the light guide connector 13.

Next, the light guide 31 exposed by removing the grip 8 is pulled toward the tip side, and the light guide 31 inside the universal cord 11 is taken out as shown in FIG. At this time, insert the light guide 31 into the socket 124 for convenience when pulling the new light guide 31 into the universal cord 11 later.
A string 42 is tied to the cap 41 on the GW side.

Next, pass the core bar 43 into the forceps channel duplex 27, pull the rear light guide 31 toward your hand, cut the adhesive 29 that fixes the tip body 17 and the molded part 28, and cut the tip body 17 and the molded part 28. 17, the molded part 28 is removed, and the forceps tip 1 thinner tube 27 and light guide 31 are removed from the operation part 2.

Next, as shown in FIG. 7, a new forceps channel tube 27' is placed over the core bar 43 protruding from the distal end side of the insertion section 3, and the base 41- of the new light guide 31' is connected to the forceps 1 thinner duplex 27' and the tip. It is tied to the core metal 43 between the part body 17 with a thread 44.

Next, pull the core bar 43 protruding from the operating section 2 side, and pull the light guide 31 and the forceps channel 127' into the flexible tube 7, and the molded part 28 is pulled into the light guide through hole 18. At the point where it is stuck, use adhesive 29 to keep the water in place and fix it.

Next, after removing the thread 44 and removing the core bar 43 from the inside of the flexible pipe 7, tie the string 42 coming out from the operation part 2 side to the base 41', and tighten the string 42 coming out from the light guide bin 1 connector 13 side.
Pull 42 and insert light guide 3 into universal cord 11.
1-, the base 41- is fixed to the light guide connector 13.

Next, insert the forceps f-rennel tube 27- into the forceps insertion port 16.
, attach the grip 8 to the operating section 2, and complete the r'i operation.

As described above, according to this embodiment, there is no need to disassemble the tip portion 4 and the curved portion 6 in order to replace the light guide 31 and the forceps channel I7 channel tube 27, and the tip portion 4 and the curved portion 6 can be connected by screws. There's no need to stop. Therefore, since the distal end portion 4 and the curved portion 6 can be fixed by adhesive, the diameter can be made smaller than when the distal end portion 4 is fixed with screws.

In addition, since only the forceps f-rennel tube 27 and light guide 13, which are easily damaged among the built-in components, can be easily replaced, the insertion section 3 can be reused, and there is no need to discard the insertion section 3 or disassemble it for repair. Repairs can be done at a much lower cost and in a shorter time.

Incidentally, in the embodiment described above, an electronic endoscope using a solid-state dancing element has been described, but the present invention may also be applied to a fiber scope having an image guide.

[Effects of the Invention] As explained above, according to the present invention, the light guide and the forceps 1? Since the tip of the tunnel tube is integrally molded and fixed to the tip body using adhesive, there is no need to increase the diameter of the endoscope tip, and parts can be easily replaced even if the light guide fiber or duplex is damaged. can be done,
Repair costs can be reduced.

[Brief explanation of drawings]

Figures 1 to 7 relate to one embodiment of the present invention, in which Figure 1 is a front view of the distal end of the endoscope, and Figure 2 is an explanation of the integrated light guide fiber and the distal end of the forceps channel tube. Figure 3 is a longitudinal sectional view of the tip of the endoscope, Figure 4 is a sectional view in the direction of △-8 in Figure 3, and Figure 5 is a schematic diagram of the endoscope.
FIG. 6 is an explanatory diagram when the light guide fiber and forceps channel tube are replaced, and FIG. 7 is an explanatory diagram when the light guide fiber and forceps channel tube are inserted. 17... Tip body 21... Objective optical system 27
... Forceps channel tube 28 ... Molding part 29 ... Adhesive 31 ...
・Light guide Figure 1 274g Moran graduation route i-A Figure 4 7 Figure 5-1,171

Claims (1)

[Claims] An endoscope having an objective optical system, a light guide fiber, and a forceps channel tube in the distal end body of the insertion section, wherein the distal end of the light guide fiber and the distal end of the forceps channel tube are integrally molded. An endoscope, wherein the endoscope is fixed to the tip body using an elastic adhesive.