JP3145870B2 - Feed tube joint structure of endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a structure of a feed pipe joint for connecting a feed pipe on the endoscope side for feeding air and water and a feed pipe on the feed side.

[0002]

2. Description of the Related Art An endoscope apparatus can introduce observation light into a body to be observed by a light guide or the like, and can observe an image captured by a distal end portion of the endoscope by optical means or electronic means. When the above-mentioned optical means is used, an observation image is guided to an eyepiece by an image guide, and when an electronic means is used, a CCD (Charge Coupled Device) which is an image pickup device is used.
The observation image captured by ice) is displayed on the monitor. In such an endoscope apparatus, a supply pipe for supplying air and water from the supply side to the distal end portion through the inside of the endoscope is disposed, and thereby, the supply pipe for cleaning the observation window and performing various treatments is provided. Qi,
Water can be supplied. In this case, the supply pipe is connected to a supply side at a joint portion provided on the endoscope side, for example.

[0003] Fig. 4 shows the configuration of a joint portion of an endoscope. A receiving portion 1 shown is attached to the endoscope side, and a connector 2 shown in the drawing is connected to the water supply tank side via a cable.
Is attached. The receiving portion 1 is provided with an air supply pipe 3A, a water supply pipe 4A, and a rubber packing 5;
In addition, an air supply pipe 3B and a water supply pipe 4B are provided. A pin 6 is arranged on the outer periphery of the receiving portion 1, while a pin engaging groove 7 is formed at the tip of the connector 2.
If the pin 6 is hooked and rotated, the two will be connected. At this time, the air supply pipe 3A and the air supply pipe 3B, and the water supply pipe 4A and the water supply pipe 4B are connected via the rubber packing 5.

[0004]

However, in the structure of the joint portion of the conventional endoscope, the position of the hole of the rubber packing 5 is determined by the air supply pipes 3A and 3B or the water supply pipes 4A and 4A.
4B, there is a problem that it is difficult to send water or air. That is, the rubber packing 5 has its hole fixed to the end face of the receiving portion 1 with an adhesive or the like in conformity with the air supply pipe 3A and the water supply pipe 4A. In some cases, the position of the rubber packing 5 is shifted or a part of the rubber packing 5 is peeled off. Therefore, in this case, the efficiency of air supply and water supply decreases, and in the worst case, the supply itself becomes impossible.

If the rubber packing 5 is not completely bonded, air may flow toward the water pipe 4A when water is supplied, and water containing air may be supplied to the body to be observed. Means that water cannot be supplied according to the purpose. Further, when the rubber packing 5 is partially peeled, there is a problem that dirt enters into the part and it becomes impossible to clean the joint part reliably.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent a position of a hole of a packing from being shifted from a feed pipe due to a rotation operation or the like , and to efficiently supply air and water. An object of the present invention is to provide a feed pipe joint part structure of an endoscope which can be performed without air being mixed in the water supply, and in which the joint part can be reliably washed.

[0007]

In order to achieve the above object, the present invention provides a plurality of feed pipes provided for air supply and water supply, and is disposed at an end of these feed pipes. and a packing, the supply pipe joint feeding of the endoscope to be connected detachably to the feed pipe by rotation operation, at least
Joint rotating unit feed pipe arranged in addition to the rotation center <br/> packing mounting surface by less than the thickness of the length of the packing to protrude from this the feed holes formed in the packing By fitting and fixing to the protruding tube, the packing
Is characterized by preventing rotation deviation of the.

[0008]

According to the above construction, the supply pipe as the air supply pipe and the water supply pipe is formed so as to protrude, and the packing hole is fitted into the protruded supply pipe. Positional displacement (rotational displacement) is prevented.
This protruding tube is used to feed other than the rotation center of the joint rotation part.
By being formed into a tube, ing to be effective to prevent rotation displacement. And since the length of this protruding tube is formed shorter than the thickness of the packing, it is possible to maintain the airtight state of the joint portion in a good condition.

In the above, the packing may or may not be bonded to the packing mounting portion using an adhesive or the like. However, when bonded, the packing can be firmly fixed, and the effect of preventing displacement can be further enhanced.

[0010]

1 and 2 show a feed pipe joint structure of an endoscope according to an embodiment, and FIG. 3 shows an overall view of an endoscope apparatus. First, in FIG. 3, the operation unit 10 of the endoscope is disposed behind the insertion unit 11, and the operation unit 10 includes a treatment instrument insertion port (forceps port) 12, an air / water supply button 13, a suction button. 14 and the like are provided. An eyepiece 15 is disposed at the rear end of the operation unit 10.
By looking into 5, the inside of the object to be observed is observed. The operation unit 10 has a light source connector 18 via a cable 17.
The light source connector 18 is provided with an air pump 19.
Connected to the light source unit 20 having

In the above-mentioned endoscope, an air supply pipe 22A and a water supply pipe 23A are arranged from the receiving portion 24 of the joint portion to the distal end through the switching structure of the air / water supply button 13, as shown in the figure. Further, a suction tube 25 is provided from the receiving portion 26 to the distal end through the structure of the suction button 14. A connector 27 connected to the receiving portion 24 is provided, and a water supply tank 28 is connected to the connector 27.

In such an endoscope, for example, by closing the upper opening of the air / water supply button 13 with a finger, the air supplied from the air pump 19 is sent to the distal end through the air supply pipe 22A. Next, when the air supply / water supply button 13 is depressed, the open path is switched from the air supply pipe 22A to the water supply pipe 23A, and the air from the air pump 19 is supplied to the water supply tank 28, whereby the water in the tank 28 is supplied. Is water pipe 2
It will be sent to the tip through 3A. At the time of suction, by operating the suction button 14, water or the like existing in the body to be observed can be sucked from the tip.

FIG. 1 is a cross-sectional view of a joint portion of the above-mentioned air supply and water supply. A pin 29 is provided in a receiving portion 24 as in the conventional case, and a pin engaging groove 30 is provided in one connector 27. Is provided. Therefore, after the pin 29 is engaged with the pin engaging groove 30, the connector 27 is rotated to connect the connector 27 and the receiving portion 24. The air supply pipe 22 is provided in the connector 27.
B, a water pipe 23B is provided.

FIG. 2 is an enlarged view of the receiving portion 24.
At the ends of the air supply pipe 22A and the water supply pipe 23A, projecting pipes 32, 3 are provided.
3 is provided, and the rubber packing 3 is
5 is attached. That is, the protruding tubes 32 and 33 are disposed so as to protrude amm from the mounting surface 36 of the rubber packing 35, and the amm is set to the thickness b of the rubber packing 35.
mm (a <b). In the embodiment, the radius of the packing attachment portion 34 is larger by cmm than the radius of the end opening of the receiving portion 24, thereby preventing the rubber packing 35 from coming off. The rubber packing 35 is provided with two holes 37 corresponding to the positions of the protruding tubes 32 and 33.

According to the above configuration, the rubber packing 35 is fitted into the two holes 37 while the protruding tubes 32 and 33 are fitted thereto.
It is attached to the packing attachment part 34. Since the position of the rubber packing 35 is fixed by the protruding pipes 32 and 33, the rubber packing 35 does not rotate and shift, and the diameter of the packing mounting portion 34 is larger than the end opening. The rubber packing 35 does not come off easily. Therefore, the efficiency of air supply and water supply does not decrease due to the positional displacement of the rubber packing 35, and it is possible to prevent air from being mixed in the water supply. In the case of the embodiment, since the rubber packing 35 is not adhered with an adhesive or the like, dirt enters.
Since the joint 5 can be removed, the dirty joint can be reliably cleaned.

On the other hand, unlike the embodiment, the rubber packing 35 can be adhered with an adhesive, which has an advantage that a stronger fixing state can be obtained. According to this strong fixing state, the possibility that a part of the rubber packing 35 is peeled off due to the rotation of the connector 27 or the like is extremely low, so that no dirt enters the bonded part and there is a problem in cleaning. It will not be.

In the above embodiment, the air supply pipe 22A, the water supply pipe 2
Although the protruding tubes 32 and 33 are provided on both of the 3A, even if only the protruding tube 32 is attached, for example, the positional displacement due to the rotation of the rubber packing 35 can be prevented. It is possible to obtain

[0018]

As described above, according to the present invention,
In a feed pipe joint section having a feed pipe and a packing for supplying air and water, the feed pipe joint section is provided at a position other than the center of rotation of the joint turning section , and can be detachably connected by a turning operation.
The supply pipe is formed so as to protrude from the packing mounting surface by a length shorter than the packing thickness, and the feed hole formed in the packing is fitted and fixed to this protruding pipe. Rotational deviation is prevented. Therefore, air supply and water supply can be performed efficiently, and air is not mixed in the water supply. In addition, there is an advantage that the cleaning of the joint portion can be performed more reliably than before.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a feed pipe joint structure related to air supply and water supply of an endoscope according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a receiving portion of the joint portion of the embodiment, in which FIG. 2 (A) is a side sectional view and FIG. 2 (B) is a front view.

FIG. 3 is a diagram illustrating an entire configuration of the endoscope according to the embodiment.

FIG. 4 is a cross-sectional view showing a feed pipe joint structure related to air supply and water supply in a conventional endoscope.

[Explanation of symbols]

 1,24 ... receiving part, 2,27 ... connector, 3A, 3B, 22A, 22B ... air pipe, 4A, 4B, 23A, 23B ... water pipe, 5,35 ... rubber packing, 10 ... endoscope, 32, 33: Projecting tube, 36: Mounting surface.

Claims (1)

(57) [Claims] 1. A air supply, a plurality of feed pipe provided for water, and a packing arranged at the end of these feed tubes, removable by rotation operation of the feed pipe In the feed pipe joint portion of the endoscope to be freely connected, the feed tube joint portion is arranged at least at a position other than the rotation center of the joint rotation portion.
By supplying pipe is formed projecting from the packing mounting surface only by the thickness <br/> remote short length of the packing, and fitting the feed holes formed in the packing to the protruding pipe fixing that, This
A feed pipe joint structure for an endoscope, wherein rotation of the packing is prevented .