JPH0418566Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a conduit switching device for an endoscope that allows suction and water supply through a channel.

[Prior Art] Conventionally, in an endoscope capable of suctioning and water supply through a channel, two cylinders are provided in the operation section, and a suction operation is performed by an operation valve that moves back and forth within one cylinder. Water supply was performed by an operating valve that moved forward and backward within the other cylinder.

[Problems to be solved by the invention] As mentioned above, in conventional endoscopes, cylinders were provided independently in the operation section for suction operation and water supply operation, so the operation section became large. This resulted in poor operability and high manufacturing costs. However, if only suction or only water supply can be performed, the technique and purpose of use of the endoscope will be limited, and its value will be significantly reduced.

This idea was made with attention to such circumstances, and was designed to create an endoscope conduit that is small and easy to operate, and that allows suction or water supply to be carried out at will, depending on the procedure and purpose of use. The purpose is to provide a switching device.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the endoscope pipe switching device according to the present invention includes a cylinder that can be connected to both the suction means and the water supply means.
a suction operation valve that communicates with a channel opening at the distal end of the insertion section and is provided in the operation section and communicates or cuts off the suction means and the channel when the cylinder is connected to the suction means; and the cylinder is connected to the water supply means. The water supply operation valve is characterized in that the cylinder is provided with a replaceable water supply operation valve that communicates or cuts off the water supply means and the channel when the water supply means is connected to the channel.

[Operation] When the suction means is connected to the cylinder, a suction operation valve is attached to the cylinder, and suction can be arbitrarily performed through the channel. When the water supply means is connected to the cylinder, water can be freely supplied through the channel by removing the suction operation valve from the cylinder and attaching a water supply operation valve in its place.

[Example] A first example of the present invention will be described based on FIGS. 1 to 6.

FIG. 2 is an overall schematic diagram of the endoscope of this embodiment, in which a channel 2 opening at the distal end of the insertion section 1 is
It communicates with a cylinder 4 provided in the operating section 3, and the cylinder 4 can be connected to either a suction device 5 or a water supply device 6. 7
is a suction tube, 8 is a water supply tube, and 9
is a known forceps plug provided at an insertion opening for inserting forceps or the like into the channel 2.

FIG. 1 shows a state in which the suction tube 7 is connected to the cylinder 4. As shown in the figure, inside the cylinder 4, a constricted portion 10 with a narrow diameter is formed at the lower part, and a channel 2 is communicated with the bottom part. The suction tube 7 is connected to the central abdomen of the cylinder 4. 11 is a rubber suction operation valve detachably provided in the cylinder 4;
An end portion of the umbrella portion 12 is removably fitted into a circumferential groove 13 formed on the outer periphery of the head of the cylinder 4.

The distal end portion 14 of the suction operation valve inserted into the cylinder 4 is formed to be thicker than the constricted portion 10 of the cylinder 4 . Therefore, as shown in the left half of FIG. 1, when the suction operation valve 11 is not touched, the tip 14 of the suction operation valve comes into contact with the constriction 10 of the cylinder, and the cylinder 4 stops there. Atmospheric air is sucked into the suction tube 7 through the closed hole 15 formed in the umbrella portion 12 .

Further, a stepped portion 16 is provided on the lower surface of the head of the suction operation valve 11.
As shown in the right half of FIG.
The upper end opening of the cylinder 4 is sealed. At the same time, a gap is created between the constriction 10 and the tip 14 of the suction operation valve, so that the suction tube 7 and the channel 2 communicate with each other, and suction is performed from the tip of the channel 2.

FIG. 3 shows a state in which the suction tube 7 is removed from the cylinder 4 and a water supply tube 8 is connected in its place. In this case, the suction operation valve 11 is replaced by a rubber water supply operation valve 18. is attached to the cylinder 4. Here, a seal portion 19 circumferentially protruding from the side of the water supply operation valve 18 closely contacts the inner surface of the cylinder 4 and closes the cylinder 4 .

Further, the tip portion 20 of the water supply operation valve 18 is formed thick and short. Therefore, when the water supply operation valve 18 is not pressed, the water supply tube 8 and the channel 2 communicate with each other as shown in the left half of FIG. 3, and water is ejected from the tip of the channel 2. and,
As shown in the right half of Fig. 3, the water supply operation valve 1
8 into the cylinder 4, the tip 20 of the water supply operation valve comes into contact with the constriction 10 of the cylinder to close the cylinder 4 and no water is supplied.

FIG. 4 shows an example in which a second water supply operation valve 28 having a long valve length is attached to the cylinder 4. In this case, contrary to the example shown in FIG.
If 8 is not pressed, the tip 30 of the water supply operation valve
comes into contact with the constriction 10 of the cylinder and the cylinder 4
is blocked and the water supply operation valve 28 is pushed into the cylinder 4, the water supply tube 8 and channel 2 are closed.
and water is ejected from the tip of channel 2.

Figure 5 shows the third point where water stops flowing when pushed in.
This is an example in which the same type of water supply operation valve as shown in the figure is attached with a third water supply operation valve 38 that has been improved to operate more reliably. The distal end portion 40 of the valve that abuts the constricted portion 10 of the cylinder is formed to protrude laterally in the shape of a thin flange. The valve is formed into a tapered shape and gradually becomes thicker between the seal portion 39 and the seal portion 39 provided circumferentially on the upper side surface, thereby increasing the strength of the valve. Furthermore, a circumferential groove 33 is formed on the inner surface of the end of the umbrella portion 32, and an edge 33 on the outer end of the circumferential groove 33 is formed on the inner surface.
a is fitted into the circumferential groove 13 on the outer periphery of the cylinder head, and the edge 13 of the circumferential groove on the cylinder tip
a is tightly fitted into the groove 33 of the umbrella portion 32. With such a configuration, the water supply operation valve shown in FIG. 5 is detachably attached to the cylinder 4.

As shown in FIG. 6, when the valve 38 is pushed in diagonally, the thin end portion 40 of the valve is pushed into the constriction 10 of the abutting cylinder.
It easily deforms according to the shape of the valve 38, and even if the valve 38 is pushed in in an oblique direction, the cylinder 4 is reliably closed and water supply is stopped. Furthermore, even if the valve 38 is pushed diagonally and a gap is created between the seal portion 39 and the inner wall of the cylinder 4, the end of the umbrella portion 32 and the head of the cylinder 4 will not fit into each other. This ensures that water leakage to the outside is prevented in that area.

In this manner, in the above-described embodiment shown in FIGS. 1 to 6, the rubber suction operation valve 11 and the water supply operation valves 18, 28, and 38 are connected to one cylinder 4.
By replacing the operation valve as appropriate, suction or water supply operations can be performed.

7 to 9 show a second embodiment of the present invention, in which the operating valve is made of metal, and a constricted portion 52 with a narrow diameter is formed on the inside of the cylinder 51. A channel 2 communicates with the bottom of the cylinder 51, and a screw is formed on the inner periphery of the head of the cylinder 51.

FIG. 7 shows a state in which the suction tube 7 is connected to the cylinder 51, and the cylinder 51 is equipped with a suction operation valve 53. Suction operation valve 53
has O-rings 54, 55 on the outer periphery near both the upper and lower ends.
A piston 57 to which a suction path 56 is formed in the middle part thereof, a push button 58 for finger rest screwed onto the top of the piston 57, and a cylinder 5.
1 and a piston 57.
It is made up of a coil spring 60 that urges outward (upward in the figure).

Therefore, when the suction operation valve 53 is not touched, the suction tube 7 sucks the atmosphere through the suction path 56, as shown in the left half of FIG.
When the suction operation valve 53 is pushed into the cylinder 51, the upper end opening of the cylinder 4 is sealed by the upper O-ring 54, and at the same time, a gap is created between the constriction part 52 and the lower O-ring 55, so that the suction tube 7 and the channel are closed. 2 are in communication with each other, and suction is performed from the tip of channel 2.

FIG. 8 shows a state in which the suction tube 7 is removed from the cylinder 51 and a water supply tube 8 is connected in its place. In this case, the water supply operation valve 63 is connected to the cylinder 51 instead of the suction operation valve 53.
is attached to. This water supply operation valve 63 differs only in the piston 67 from the suction operation valve 53 shown in FIG.
The other parts may be exactly the same as the suction operation valve 53.
That is, in the state shown in the left half of FIG. 8 where the water supply operation valve 63 is not pressed, the two upper and lower O-rings 64,
In the state shown in the right half of FIG. 8, in which the cylinder 51 is completely closed by the cylinder 51 and no water is supplied, and the water supply operation valve 63 is pushed into the cylinder 51,
The water supply tube 8 and the channel 2 communicate with each other, and water is ejected from the tip of the channel 2.

In FIG. 9, the piston 77 is formed shorter so that the operation is opposite to that in FIG. 8, and when the water supply operation valve 73 is not pressed, the water supply tube 8 is
and the channel 2 communicate with each other, water is ejected from the tip of the channel 2, and the water supply operation valve 73 is connected to the cylinder 51.
When pushed in, the cylinder 51 is closed and water is not supplied.

In this way, in the second embodiment, the presser ring 5
9 to the threaded portion of the head of the cylinder 51, the suction operation valve 53 and the water supply operation valve 63,
73 is detachably installed in one cylinder 51, and by replacing the operating valve as appropriate,
Suction or water supply operations can be performed.

Incidentally, the connection between the suction tube and the water supply tube may be switched by a switch or the like.

[Effects of the invention] According to the pipe switching device for an endoscope of this invention, suction or water supply can be performed as desired by attaching an appropriate operation valve to the cylinder, so that the purpose of use of the endoscope is improved. Alternatively, you can freely select and operate either the suction or water supply function depending on the procedure, etc. Furthermore, since only one cylinder needs to be provided in the operating section, the operating section is small and lightweight. It has excellent effects such as good operability.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the first embodiment of the present invention with a suction operation valve attached to the cylinder, Fig. 2 is a general schematic diagram of the endoscope, and Fig. 3 is the first embodiment of the invention. FIG. 4 is a cross-sectional view of the example with a water supply operation valve attached, FIG. 4 is a cross-section of the embodiment with a second water supply operation valve of a different shape attached, and FIGS. FIG. 7 is a sectional view of the embodiment with a third water supply operation valve of a different shape attached, and FIG. 8 is a sectional view of the second embodiment, with a suction operation valve attached to the cylinder. and FIG. 9 is a sectional view of the same with the water supply operation valve attached. DESCRIPTION OF SYMBOLS 1...Insertion part, 2...Channel, 3...Operation part, 4...Cylinder, 5...Suction device, 6...Water supply device, 11...Suction operation valve, 18, 28, 38
... Water supply operation valve, 51 ... Cylinder, 53 ... Suction operation valve, 63, 73 ... Water supply operation valve.

Claims (1)

[Scope of utility model registration request] A cylinder that can be connected to both the suction means and the water supply means is provided in the operating section so as to communicate with a channel that opens at the distal end of the insertion section, and when the cylinder is connected to the suction means, the cylinder is connected to the suction means. The cylinder is provided with a suction operation valve that communicates with or shuts off communication with the channel, and a water supply operation valve that communicates or disconnects the water supply means with the channel when the cylinder is connected to the water supply means, so that the cylinder can be replaced. A conduit switching device for endoscopes.