JPH0440013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an endoscope that facilitates assembly by simplifying the connection between a channel tube and a channel base.

[Conventional technology]

In the case of an endoscope equipped with a forceps channel, a channel base is provided in the operation section, and a treatment instrument is inserted through the channel base into a channel tube built in the insertion tube body.

Incidentally, in such an endoscope, conventionally, as shown in FIG. 3, a channel tube b in an insertion tube body a and a channel cap c have been directly connected and fixed. Specifically, conventionally, in such an endoscope, as shown in FIG.
In addition to connecting the insertion tube body a into which the channel pipe b is inserted through the cylindrical support e (corresponding to an annular connecting member) to the end of the cylindrical support e, the branch body f can be slid freely on the outer peripheral surface of the cylindrical support e. Use the structure provided. When connecting the channel cap c to the channel tube b, the end of the channel tube b on the endoscope operation section d side is exposed from the branch section to the outside, as shown in FIG. 4. After that, the channel cap c was connected and fixed to the end of the channel pipe b by adhesive or other means.

[Problem that the invention seeks to solve]

However, since each part is bonded and dried in an unstable state, the channel pipe b
The connection between the endoscope and the channel cap c was troublesome, and the endoscope was not easy to assemble.

The present invention was made in view of these problems, and an object of the present invention is to provide an endoscope that can be easily assembled.

[Means and actions for solving problems]

This endoscope is provided with a channel receiving part having an outer diameter that can pass through the annular connecting member that connects the insertion tube body at the end of the channel tube on the operating section side, and the channel base is connected to the channel receiving part. Make it connect. In other words, by simply connecting the channel receiving portion to the channel cap, the channel pipe and the channel cap can be connected by simply assembling the channel pipe, thereby facilitating assembly.

[Embodiments of the invention]

The present invention will be described below based on an embodiment shown in FIGS. 1 and 2. FIG. 1 shows the structure around the forceps channel of a small-diameter endoscope 1, where 1 is an endoscope operating section and 2 is an endoscope insertion section.

Here, the endoscope operation section 1 will be explained as follows.
3 has a plurality of rod-shaped members 5 erected at the end of the head side of the cylindrical support 4 (corresponding to an annular connecting member), and a closed-side cover 6 is attached to the end of these rod-shaped members 5 . This is a frame part that is connected to each other. A circumferential cover 7 is slidably arranged around the rod-shaped members 5 to close the circumference of the rod-shaped members 5 together with the closing-side cover 6. The lower end of the circumferential cover 7 is slidably supported in the downward direction by locking a detachable ring 5a screwed onto the outer circumferential portion of the head side of the cylindrical support 4. In a space surrounded by the side cover 6 and the circumferential cover 7, an equipment storage chamber 8 is formed which can be freely exposed to the outside by sliding the circumferential cover 7. Although not shown, various types of equipment necessary for operating the endoscope are housed inside this equipment storage chamber 8. In addition, on the outer peripheral surface of the cylindrical support 4,
A branch main body 9 formed in a substantially Y-shape with a columnar cover 10 connected to the upper end is slidably fitted onto the outside, and a mouth branching to the side of the branch main body 9 serves as a channel entrance. It consists of 12. The channel entrance section 12 of this endoscope operating section 1
A channel cap 13 is provided in the channel cap 13 . Further, the lower end of the branch main body 9 has a stepped portion 1 formed on its outer periphery.
4 as a support part, it is fixed to the cylindrical column 4 with a fixing screw 15 screwed inward from the outer circumferential side of the stepped part 14, and by removing the fixing screw 15, the branch main body 9 and the cover 10 are fixed to the cylindrical column 4. It is designed so that it can be slid downwardly of the support column 4. Note that 16 is an O-ring that seals between the upper end of the cover 10 and the detachable ring 5a, and 17 is an O-ring that seals the connection between the branch main body 9 and the cover 10.

On the other hand, as for the structure of the endoscope insertion section 2, a bend-preventing member 21 made of rubber is attached to the outer peripheral surface of a flexible insertion tube body 19 into which the channel tube 18 is inserted, and a bend-preventing fixing nut 20 is connected to the tip thereof. It consists of an exterior that can be slid freely. The insertion tube body 19 of the endoscope insertion section 2 has its distal end inserted into the distal end portion of the cylindrical column 4 that protrudes from the branch body 9, and also extends from the outer peripheral side of the insertion tube body 19. It is fixed to the cylindrical support 4 with an insertion part fixing screw 22 screwed toward the cylindrical support 4 side. The tip of the anti-bending fixing nut 20 is fitted onto the stepped portion 14 of the cylindrical support 4, and the threaded portion of the anti-bending fixing nut 20 is inserted into the threaded portion 23 carved on the outer peripheral surface of the cylindrical support 4. These insertion tube bodies 19 and anti-bending members 2 are fixed by screwing.
1 is fixed to connect the endoscope insertion section 2 to the endoscope operation section 1. Note that 24 is an O-ring provided on the upstream side of the fixing screw 15 to seal between the anti-bending fixing nut 20 and the branch main body 9, and the portion of the cylindrical support 4 facing the channel entrance 12 is an opening. Of course that's what I'm doing. The end of the channel tube 18 inserted into the insertion tube body 19 on the operating section side is detachably fixed to the channel cap 13 of the endoscope operating section 1 via a channel receiving section 25 provided at the end. has been done.
That is, the channel cap 13 has a step 27 formed at the tip of a cap main body 26 formed into a substantially cylindrical shape, and a plurality of pins (not shown) protruding from the outer peripheral surface of the rear stage of the step 27. Furthermore, there is a threaded part 29 for attaching a stopper on the outer peripheral surface of the rear stage of the pin.
is provided to configure the tip side. Further, a recess 30 for mounting a receiving part is provided in the rear end of the cap body 26, and a flange portion 31 is formed on the outer peripheral surface of the center portion of the cap body 26, and the flange portion 31 is used as a stopper. A fixing ring 32 having a threaded portion formed on the outer peripheral surface is detachably arranged on the base body 26 to constitute the entire body. The channel cap 13 is inserted into the channel inlet section 12 of the branch main body 9 until its rear side contacts the positioning seat 33 provided on the inner surface of the channel inlet section 12, and then the fixing ring 32 is inserted into the channel inlet section. It is attached by inserting a screw toward the threaded portion provided on the inner surface of the flange portion 12 and sandwiching the flange portion 31 with a fixing ring 32. On the other hand, as shown in FIG. 2, the channel receiving part 25 has a substantially cylindrical insertion part 35 with a conical tip formed at its rear portion, which can be inserted into the recess 30 of the channel base 13. A recess 37 is formed along the circumferential direction on the central outer peripheral surface of the receiving body 36, and a step 38 protruding outward is connected to the rear end of the recess 37. There is. The outer diameter of the channel receiving portion 25 is set to be smaller than the inner diameter of the cylindrical support 4. In other words, the channel receiving portion 25 is designed to be able to pass through the inside of the cylindrical column 4. The channel receiving portion 25 is attached to the channel pipe 18 so that it will not come off. That is, the end of the channel tube 18 is inserted into the recess 37 and the stepped portion 38 of the channel receiving portion 25, and the outer peripheral portion disposed in the recess 37 of the channel tube 18 is inserted into the thread 3.
9, and then the wound thread portion is fixed with an adhesive 40. Of course, the recessed portion 30 of the channel cap 13 has an inner diameter dimension corresponding to the outer diameter of the channel receiving portion 25.
And the channel receiving part 2 configured in this way
5 is removably attached to the channel cap 13 using a fixing screw 43 having a sharp tip. That is, a sloped surface 41 is formed on the back surface of the fitting portion 35, and a slope surface 41 is formed on the opening side of the peripheral wall of the recess 37. A plurality of screw holes 42 are bored corresponding to the positions of the inclined surface 41 when the insertion part 35 is inserted, and after the insertion part 35 is inserted into the recess 30, each screw hole 4 is opened.
By screwing the fixing screws 43... toward the inclined surface 41 from . Therefore, the channel receiving portion 25 is pressed against the inner bottom side of the recess 30.
is fixed to the channel cap 13. By using the channel receiving part 25 smaller than the inner diameter dimension of the cylindrical support 4, the channel pipe 18 and the channel receiving part 25 can be connected in advance.
If you fix it, in the subsequent assembly of the endoscope 1,
Channel receiving part 2 serving as the end of the channel pipe 18
5 can be housed in the cylindrical support 4 together with the channel pipe 18.

Note that 45 is a forceps plug detachably provided at the tip of the channel base 13, and 58 is an O-ring provided on the channel receiver 25 for sealing between the channel receiver 25 and the channel base 13.

Therefore, when connecting the channel pipe 18 and the channel cap 13 in such a structure,
A channel receiving part 2 is attached to the end of the channel pipe 18 in advance.
5 are connected and fixed by winding a thread 39 and using an adhesive 40. Next, the insertion tube body 19 incorporating the channel tube 18 is inserted into the cylindrical column 4 from below, and the insertion tube body 19 is fixed with the insertion portion fixing screw 22. As a result, the end of the channel pipe 18 is connected to the cylindrical support 4.
It can be stored inside. In other words, when the inner diameter of the cylindrical support 4 and the channel support 25 are D, and the outer diameter of the channel support 25 is d, D>d
Since the relationship is as follows, the channel receiving portion 25 passes through the inside of the cylindrical support 4.

Next, using the cylindrical support 4 as a guide, the branch main body 9 is lowered as shown in FIG. That is, the channel receiving portion 25 is caused to pass through the opening of the cylindrical support 4 and protrude outward from the channel entrance portion 12 of the branch portion. After that,
The channel receiving part 25 is inserted and fixed into the recessed part 30 of the channel cap 13, and the channel receiving part 25 is securely fixed with a fixing screw 43.

Then, raise the lowered branch main body 9 upward,
After positioning the channel mouthpiece 13 at the channel entrance part 12, if it is fixed with the fixing ring 32, the connection between the channel pipe 18 and the channel mouthpiece 13 is completed.

In this way, the channel pipe 1 is installed using the channel receiving part 25 that can pass through the inside of the cylindrical support 4.
The structure for connecting the endoscope insertion portion 2 to the cylindrical support 4 has good workability, since the endoscope insertion portion 2 can be attached to the cylindrical support 4 after the channel pipe 18 and the channel mouthpiece 13 are connected. In other words, the connection work can be carried out in a spacious area, the troublesome work inside the endoscope operating section 1 is not required, and the assembly is easy.

〔Effect of the invention〕

As explained above, according to the present invention, it is only necessary to connect the channel tube and the channel receiver in a spacious place, and then attach the endoscope insertion section to the endoscope operation section. Connection with the base can be accomplished by simply assembling it.

Therefore, it can be easily assembled and workability can be improved.

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention, FIG. 1 is a cross-sectional view of the endoscope, FIG. 2 is a cross-sectional view showing the structure around the channel receiving part, and FIG. 3 is a conventional endoscope. FIG. 4 is a cross-sectional view showing the endoscope, and FIG. 4 is a cross-sectional view showing the connection area between the channel pipe and the channel base. DESCRIPTION OF SYMBOLS 1...Endoscope operation part, 4...Cylindrical support (annular connecting member), 13...Channel cap, 18...
Channel pipe, 25...Channel receiving part.

Claims (1)

[Claims] 1. In an endoscope having a forceps channel, the channel tube inserted into the insertion tube body, the channel mouthpiece provided on the endoscope operation section, and the insertion tube body provided on the endoscope operation section are connected. It is characterized by comprising an annular connecting member, and a channel receiving part that is provided at the end of the channel pipe on the operating section side, has an outer diameter dimension that allows the channel pipe to pass through the connecting member, and is communicatively connected to the channel cap. endoscope.