JPH0417649B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a forceps port device for an endoscope in which a channel tube inserted into a body insertion portion serves as both a forceps insertion path and a suction path.

"Prior Art and its Problems" In endoscopes, in addition to image transmission optical fiber bundles, illumination optical fiber bundles, air and water supply tubes, etc., forceps inserted through the forceps port of the operating section are used to A forceps insertion path for protruding from the body cavity and a suction path for suctioning mucus and air inside the body cavity are required, but conventionally, these two passages have been combined with a channel tube disposed inside the body insertion part. For this reason, in the conventional forceps port device, the forceps port insertion member of the channel tube that is directly guided to the forceps port is branched by a branch pipe, and the suction tube is connected to this branch pipe.

On the other hand, the forceps opening is generally provided at the distal end of the endoscope operating section, but since the operating section needs to be formed thinner toward the distal end, the forceps opening is
The built-in contents of the operating section become the most crowded, and the space inside the operating section becomes extremely narrow. That is, the forceps port insertion member of the channel tube fixed to the branch forceps port tube protruding radially from the operating section and the branch pipe branched from this forceps port insertion member form a Y-shape or a T-shape. Therefore, it requires a lot of storage space,
This makes it difficult to arrange and assemble the built-in components of the operating section. In particular, recent endoscopes are required to be watertight, as they are immersed in disinfectant solution for cleaning after examination, and it has become common practice to cover the operating section with a cylindrical cover, making this difficult. It's increasing. Furthermore, from the perspective of the endoscope assembly process, these difficulties are caused by the fact that assembly is started from the front of the body insertion section and the rear of the operating section, and the final assembly is performed at the forceps opening. JP-A No. 58-19221 was developed with the aim of solving these problems, but it has a large number of parts, is not necessarily easy to assemble, and does not have enough space inside the operating section. So, there is room for improvement.

``Object of the Invention'' An object of the present invention is to solve these problems and provide a forceps mouth device that has a simple structure, is easy to assemble, and can secure a sufficient space inside the operating section.

"Summary of the Invention" The present invention involves introducing and fixing a forceps port insertion member having a connecting tube of a channel tube and a branch pipe connecting a suction tube into a branched forceps port tube of a forceps port cover at the end of an assembly process. This was created based on the idea of an endoscope that covers the outside of the operating section support member that constitutes the internal frame of the endoscope operating section with a cylindrical forceps port cover that has a branched forceps port tube that forms the forceps port. In this forceps port device, a forceps port insertion member having a connecting pipe of a channel tube and a branch pipe to which a suction tube is to be connected is provided, and the moving direction of this forceps port insertion member is regulated in the radial direction of the operating part support member. The present invention is characterized in that a guide mechanism is provided to guide the channel tube connecting tube into the branched forceps port tube, and the forceps port insertion member is fixed to the forceps port cover.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. FIG. 7 is an overall view of the endoscope.
A flexible body insertion section 15 is connected to the distal end of the eyepiece 1, and an eyepiece device 16 and a suction operation valve 17 are provided at the rear end. As is well known, the curved portion 15a at the distal end of the body insertion section 15 is bent by rotating the operation knob 18 provided on the operation section 11. 19
is a bend-proof cover for the flexible body insertion part 15. An image formed by an objective lens (not shown) provided at the tip of the curved portion 15a is observed by the eyepiece device 16 via an image transmission optical fiber bundle disposed within the body insertion portion 15 and the operating portion 11. Internal insertion part 1
5 and the operation unit 11 include an optical fiber bundle for illumination that guides illumination light via the light guide cable 20, an air/water supply tube for supplying air or water by operating the air/water supply button 21, etc. Internal items are stored.

FIG. 1 is an enlarged sectional view of the forceps port cover 14 portion. The branch forceps mouth tube 13 is the forceps mouth cover 1
4 and is fixed by means such as brazing, and the rear end of the forceps opening cover 14 is attached to an O-ring 22.
The front end is attached to the grip part cover 12 through the fixing screw 2.
3 as an internal frame for the operating part support 2
It is fixed at 4. The operation section support 24 has a rear main plate fixed to the rear end of the operation section 11, and the main plate supports a bending operation mechanism of the bending section 15a, but the illustration thereof is omitted. There is. As shown in FIG. 2, the front part of this operation part support body 24 is
A pair of left and right support legs 25, 25, and this support leg 2
The fixed cap 28 of the body-insertable portion 15 is fixed to the inside of the annular portion 26 via a cap holder 29, and the anti-bending cover 19 is screwed to the outside. Fixed.

The pair of support legs 25 are connected by a semicircular fixing ring 30, and the fixing screw 23 is screwed into a screw hole 31 provided in the fixing ring 30. , the center part of the semicircular positioning ring 32 is cut out, and the forceps opening insertion member 3 is cut out.
Three insertion portions 34 are formed.

As shown in FIGS. 1 and 2, the forceps port insertion member 33 has a channel tube connecting tube 36 and a branch tube 37 branched from the channel tube connecting tube 36, which are fixed together by means such as brazing. This connecting pipe 3
6. A channel tube 40 is connected to the branch pipe 37 via tube fixed coils 38 and 39, respectively;
A suction tube 41 is fixed. Both tubes are made of flexible tubes, and the channel tube 40 passes through the inside of the body insertion part 15 and communicates with a forceps protrusion (not shown) at the tip of the body insertion part 15, and the suction tube 41 communicates with the operation part 11. The suction operation valve 17 is further connected to a suction source.

The outer surface of the forceps port insertion member 33 has markings shown in FIGS. 2 and 3.
As shown in Figure B, a pair of flanges 43a, 43
A and a locking groove 43b between the flange are formed, and the flanges 43a, 43a are formed with detent flat surfaces 42, 42 on both sides thereof. Locking groove 4
3b corresponds to a semicircular retaining protrusion 44 (see FIG. 3A) formed on the inner surface of the branched forceps mouth tube 13, and a forceps rotation preventing groove 45 is also formed in a part of the flanges 43a, 43a. has been done. On the opposite side of the retaining protrusion 44, a space sufficient to pull up the forceps port insertion member 33 is secured.

A forceps mouth body 4 is inserted into the branched forceps mouth tube 13 from the outside.
6 can be inserted, and a rotation prevention protrusion 47 that is inserted into this forceps rotation prevention groove 45 is formed at the tip of this forceps mouth body 46 (a fourth
figure). The forceps mouth body 46 is formed with a tapered syringe insertion port 48 that matches the taper of the syringe. Reference numeral 49 denotes a holding ring, which is screwed onto the inlet of the branched forceps mouth tube 13 to hold the forceps mouth body 46 into the forceps mouth insertion member 3.
3 and the retaining protrusion 44.

The greatest feature of the present invention is that the forceps opening insertion member 3
3 can be moved in the radial direction within the operating portion support 24 before assembly, particularly within the diameter of the forceps opening cover 14. That is, in assembling the device having the above structure, after fixing the rear part of the operating part support 24 to the rear part inside the operating part 11, the grip part cover 12 is covered, and this cover 12 is secured to the operating part support with the retaining ring 50. Fix it on the outside of 24. Furthermore, the fixed cap 28 at the rear end of the assembled body insertion portion 15 is fixed to the tip of the operating portion support 24 via a cap holder 29. In this state, the operation part support 24 is open, so that assembly work can be performed by inserting a fingertip into the operation part support 24 through the gap between the support legs 25, 25.

In this assembly work, the rear end of the channel tube 40 inserted into the body insertion part 15 is fixed to the connection tube 36 of the forceps port insertion member 33 using the tube fixing coil 38, and the rear end of the channel tube 40 inserted into the body insertion part 15 is fixed to the connection tube 36 of the forceps port insertion member 33, and the rear end is The distal end of the suction tube 41 is fixed to the branch pipe 37 using a tube fixing coil 39. Then, the forceps port insertion member 33 can be moved in the radial direction of the forceps port cover 14 by the channel tube 40 made of a flexible tube and the suction tube 41. Thereafter, the forceps port cover 14 is placed over the operation section support 24 and moved toward the grip section cover 12. At this time, the forceps port insertion member 33 is moved inward and the forceps port cover 14 is moved to the side of the grip section cover 12.
Avoid interfering with 4. After fitting the forceps mouth cover 14 to the inside of the tip of the gripping part cover 12 via the O-ring 22, tighten the operation part support 24 with the fixing screw 2.
3 to fix it to the fixed ring 30. In this state, insert the forceps from the branched forceps mouth tube 13 and pull up the forceps mouth insertion member 33, and then
2 and 42 into the insertion portion 34 of the operating portion support 24, and the locking groove 43b into the retaining protrusion 44 on the inner surface of the branched forceps mouth tube 13. Next, the forceps mouth body 46 is inserted into the branched forceps mouth tube 13, and its anti-rotation protrusion 47 is inserted into the forceps anti-rotation groove 45 of the flange 43a.
Further, the presser ring 49 is screwed onto the inlet of the branched forceps mouth tube 13, and the flange 43a is brought into close contact with the retaining protrusion 44 via the forceps mouth body 46 and fixed. In this state, the forceps mouth insertion member 33 is prevented from rotating by the rotation preventing plane 42 and the insertion portion 34, and the forceps mouth body 46 is prevented from rotating by the rotation prevention projection 47 and the forceps rotation prevention groove 45, respectively. after that,
Fit the tip cover 51 to the tip of the forceps mouth cover 14 via the O-ring 52, and then attach the anti-bend cover 1.
9 is screwed onto the outer periphery of the tip of the operating portion support 24, and the assembly work is completed. A forceps plug 53 made of rubber is attached to the forceps mouth body 46 at a protrusion from the presser ring 49 .

FIG. 6 shows another embodiment of the present invention, in which a radial separating wall 55 is integrally provided on the operation part support 24, and a forceps opening is inserted into a diametrical guide groove 56 formed in the separating wall 55. A member 33 is slidably fitted. In the separating wall 55, guide holes 57 are formed on both sides of the guide groove 56, through which an image transmission optical fiber bundle, an illumination optical fiber bundle, an air/water supply tube, a bending operation wire, etc. are inserted. According to this embodiment, when the forceps port insertion member 33 is pressed and displaced inward, there is no fear that the other built-in components are pushed and damaged by the forceps port insertion member 33, and moreover, the forceps port insertion member 33 Since the moving direction of the forceps port insertion member 33 is regulated, it becomes easy to insert the forceps port insertion member 33 into the branched forceps port tube 13.

Note that the means for fixing the forceps port insertion member 33 to the branched forceps port tube 13 in the above embodiment is only an example, and
The present invention is not concerned with any fixing means as long as it can be fixed to the branched forceps mouth tube 13 in a state where it is prevented from rotating.

"Effects of the Invention" As described above, the forceps port device of the present invention allows the forceps port insertion member having the connecting tube of the channel tube and the suction tube branched from the channel tube to be connected to the operation part support serving as the internal frame by the guide mechanism. Since the forceps cover can be moved in the radial direction and guided into the branched forceps mouth tube of the forceps cover, the forceps mouth insertion member can be moved radially inward when the forceps cover is placed on the operation part support, and after the forceps cover is covered, it can be easily guided. The branched forceps can be guided into the mouth. In other words, since the forceps port insertion member does not get in the way when the forceps port cover is put on, the forceps port cover can be thinned, compared to the conventional device in which the forceps port insertion member protruding in the radial direction is fixed to the operation part support in advance. It can be made into a material with a diameter of 1.5 mm, and has good workability. Further, in the final assembled state, the forceps port insertion member is pulled up into the branched forceps port tube and fixed to the forceps port cover side, so that a large space can be secured within the forceps port cover. moreover,
The number of components for fixing the forceps port insertion member is as follows:
Since only a few parts are required, an excellent forceps mouth device can be obtained which has a simple structure, is easy to assemble, is convenient for maintenance and inspection, and is light in weight.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the main parts showing an embodiment of the forceps port device for an endoscope according to the present invention, FIG. 2 is a perspective view of the front part of the operation part support and the forceps port insertion member, and FIG. 3A is a 1 and 3B are views of the forceps mouth insertion member with the forceps mouth insertion member, forceps mouth body, and presser ring removed, and FIG.
5 is a sectional view taken along the - line in FIG. 1, FIG. 6 is a sectional view similar to FIG. 5 showing another embodiment of the present invention, and FIG. FIG. 2 is a plan view showing the entire endoscope. 11... Operating unit, 12... Gripping unit cover, 13
...Branch forceps mouth tube, 14... Forceps mouth cover, 15
... Body insertion part, 16 ... Eyepiece device, 17 ... Suction operation valve, 24 ... Operation part support body, 25 ... Support leg, 30 ... Fixed ring, 33 ... Forceps port insertion member,
34...Insertion part, 36...Connecting pipe, 37...Branch pipe, 38, 39...Tube fixing coil, 40...
...Channel tube, 41...Suction tube,
43a...Latching groove, 44...Keeping projection, 45
... Forceps anti-rotation groove, 46 ... Forceps mouth body, 47...
... Anti-rotation protrusion, 49 ... Presser ring, 56 ... Guide groove.

Claims (1)

[Claims] 1. An operation section support member that constitutes the internal frame of the endoscope operation section; A cylindrical forceps port cover that has a branched forceps port tube that constitutes the forceps port and covers this operation section support member; A channel tube whose distal end opens at the distal end of the body insertion part and whose rear end is guided to this branched forceps orifice tube; and a suction tube branched from this channel tube; In an endoscope forceps orifice device, the channel A forceps port insertion member having a connecting pipe of the tube and a branch pipe to which the suction tube is to be connected; The moving direction of this forceps port insertion member is regulated in the radial direction of the operating section support member, and the channel tube connecting pipe is connected to the A guide mechanism provided between the operation part support member and the forceps port insertion member to guide the forceps into the branched forceps port tube; and a fixing means for fixing the forceps port insertion member to the forceps port cover. Characteristic endoscope forceps mouth device.