JPH08266462A - Pipeline changeover device for endoscope - Google Patents

Abstract

PURPOSE: To provide a pipeline changeover device for an endoscope which realized a higher operability, a significant reduction in production costs and a higher washing performance by simplifying the structure very much. CONSTITUTION: An air pipe 11 connected to an air feeder and a suction pipe 12 connected to a suction device are connected to a cylinder body 41 and a base end of a channel 6 opened at the tip of an inserting part of an endoscope is connected to a bottom part of the cylinder body 41 so that the connecting position of the air pipe 11 and the suction pipe 12 is switched with respect to the channel 6 by the operation of advancing or retracting a piston body 43 axially within the cylinder body 41. Moreover, a forceps cock 55 which is closed normally and is opened by the insertion of a treating device is formed at a head part of the piston body 43 and a path 45 is formed on the piston body 43 to guide the treating device inserted from the forceps cock 55 into the channel 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope conduit switching device for performing air feeding operation and suction operation in an endoscope.

[0002]

2. Description of the Related Art In endoscopes, in many cases, an air supply control valve for supplying air into a body cavity for inflating internal organs, and aspirating blood, secretions, and other dirty liquid in the body cavity. A suction operation valve for performing a suction operation for removal is provided.

Further, a forceps insertion opening for inserting a treatment tool for performing a treatment such as collecting tissue in a body cavity is provided, and the treatment tool is normally closed and the treatment tool is inserted. Then, the forceps plug which is opened by it is attached.

[0004]

However, in the conventional endoscope, since the air supply operation valve, the suction operation valve, and the forceps insertion port are provided separately, the structure is complicated and the manufacturing cost is high. Also, it was difficult to completely clean and disinfect after using the endoscope.

Therefore, the present invention provides a conduit switching device for an endoscope, which can have a very simple structure and can realize improved operability, significantly reduced manufacturing cost, and improved cleanability. The purpose is to provide.

[0006]

In order to achieve the above object, a conduit switching device for an endoscope of the present invention comprises an air supply pipe connected to an air supply device and a suction pipe connected to a suction device. Connected to the cylinder body, the base end of the channel opening to the insertion portion tip of the endoscope is connected to the bottom portion of the cylinder body, and the piston body is moved forward and backward in the cylinder body to move the piston body forward and backward. A forceps plug, which is normally closed and is opened by inserting a treatment tool, is formed on the head of the piston body and is inserted from the forceps plug while the connection state between the air supply pipe and the suction pipe is switched. A passage for guiding the treatment instrument into the channel is formed in the piston body.

[0007]

Embodiments will be described with reference to the drawings. FIG. 5 shows an endoscope used for gastrointestinal examinations of the stomach and the like, 2 is an operating portion, and 3 is an insertion portion made of a flexible tube. A tip portion main body 5 having an objective optical system and the like built therein is connected to the tip of the insertion portion 3.

The operation section 2 is provided with an air supply / suction switching operation valve 40 on the front side, and an eyepiece section 8 is projectingly provided on the upper end. A connector (not shown) that is detachably connected to the light source device is attached to the tip of the connection flexible tube 9 connected to the operation unit 2.

An air supply / suction / forceps channel 6 (hereinafter, simply referred to as "channel 6") which is open outward in the tip end main body 5 is inserted from the inside of the operation portion 2 into the inside of the insertion portion 3.

The base end side of the channel 6 is connected to the bottom of the air supply / suction switching operation valve 40. Further, an air supply pipe 11 and a suction pipe 12 connected to an external air supply device and a suction device (not shown) are connected to the side surface of the air supply / suction switching operation valve 40 through the connecting flexible tube 9. There is.

FIG. 1 shows the air supply / suction switching operation valve 40 in a standby state, in which a cylinder body 41 is provided in the operation portion 2 and its mouth is open to the outside of the operation portion 2.
The channel 6 is connected to the central axis position of the bottom of the cylinder body 41, and the air supply pipe 11 and the suction pipe 12 are connected to the side surface of the cylinder body 41. Further, a leak hole 42 that communicates with the atmosphere is formed on the side surface of the cylinder body 41.

A piston body 43 made of metal or plastic is fitted in the cylinder body 41 so as to be movable back and forth in the axial direction. A shaft hole 45 (passage) extending over the entire length is provided at an axial position of the piston body 43. It is drilled through.

An air supply pipe 11 is provided on the outer peripheral surface of the piston body 43.
A wide communication groove 46 communicating with the suction pipe 12 and the leak hole 42 is formed on the circumferential surface. A narrow circumferential groove 47 is formed on the proximal side (mouth side) of the communication groove 46, and a communication hole 48 connects the circumferential groove 47 and the shaft hole 45. Before and after each groove 46, 47, a piston body 43 is formed.
An O-ring for sealing is attached to the outer periphery of the.

The head of the piston body 43 projects outward from the mouth of the cylinder body 41, and the projection end of the projecting portion is
An elastic operation button 50 made of, for example, rubber is attached.

The tip of the operation button 50 is on the piston body 4 side.
3 is detachably attached to a flange-like portion 43a protruding from the protruding end of the cylinder 3, and the base portion of the operation button 50 is detachably attached to a flange-like portion 41a protruding from the mouth of the cylinder body 41. There is.

The operation button 50 is formed in a hollow 8-shaped cross section, and an air passage 51 for communicating the upper and lower chambers is formed between the operation button 50 and the piston body 43 in the middle thereof. .

In the operation button 50, the thickness of the base-side half 50a near the cylinder body 41 is smaller than that of the head-side half 50b. Therefore, the piston body 4
Operation button 50 in the direction of pushing 3 into cylinder body 41.
When is pressed with the tip of the finger from the tip end side, the base half 50a is first crushed as shown in FIG. 2, and when the operation button 50 is further pressed, the head half 50b is crushed as shown in FIG. .

When the pushing force of the fingertip is relaxed, the elasticity of the operation button 50 first restores the head half 50b as shown in FIG. 2, and then the base half as shown in FIG. The part 50a is restored.

Reference numeral 52 denotes an operation button 5 for such an operation.
In order to move the air in 0 to the outside, the head side half 5
0b is a ventilation hole formed on the outer wall surface. 53 is also
As shown in FIG. 3, when the head side half part 50b is crushed, it is a ventilation groove 53 for letting in and out air between the head side half part 50b and the base side half part 50a.

A finger rest 54 for placing an operating finger is formed on the tip end of the operation button 50, and it is normally closed at the center thereof and is opened by inserting the treatment instrument 100 when the instrument 100 is inserted. The "-shaped slit is formed, and that portion is a so-called forceps plug.

In the embodiment thus formed, in the standby state, as shown in FIG. 1, the air sent from the air feed pipe 11 into the cylinder body 41 passes through the communication groove 46 and the suction pipe. The air having a difference between the air supply amount and the suction amount is sucked into 12, and is sent or sucked from the leak hole 42.

Then, as shown in FIG.
4 of the operation button 50 on the proximal side half 5
When the piston body 43 is pushed to the position where 0a is completely crushed, the circumferential groove 47 faces the opening of the air feeding pipe 11, and the air feeding pipe 11 is inserted into the shaft hole 45 via the circumferential groove 47 and the communication hole 48. Further, the air is supplied from the air supply pipe 11 to the tip of the insertion portion through the channel 6. The atmosphere is sucked into the suction pipe 12 through the leak hole 42 and the communication groove 46.

As shown in FIG. 3, when the piston body 43 is pushed until the operation button 50 is completely crushed, the circumferential groove 47 faces the opening of the suction pipe 12, and the circumferential groove 47 and the communication hole 48. The suction tube 12 communicates with the shaft hole 45 via the, and suction is performed from the tip of the insertion portion to the suction tube 12 via the channel 6. The air sent into the cylinder body 41 from the air supply pipe 11 is released to the atmosphere through the ventilation path 51, the ventilation groove 53, and the ventilation hole 52.

As shown in FIG. 4, when the treatment instrument 100 is inserted into the slit of the forceps plug 55 from the outside in the standby state, the treatment instrument 100 pushes the slit and is formed on the piston body 43. It is guided through the shaft hole 45 into the channel 6 and protrudes from the opening at the tip of the insertion portion.

After the end of the endoscopic examination, the operation button 50 is removed from the cylinder body 41 and the piston body 43, the piston body 43 is pulled out from the cylinder body 41, and the inside of the cylinder body 41, the piston body 43, and the forceps plug 55 are removed. Etc. can be easily washed at the same time.

[0026]

According to the present invention, by switching the piston body in the axial direction in the cylinder body, it is possible to switch between air supply and suction, and at the same time, forceps formed on the head of the piston body. Since the treatment tool can be inserted from the stopper, all operations can be performed by one operation valve with a simple structure, and the entire structure can be made extremely simple, improving operability and manufacturing cost. Can be significantly reduced and can be easily washed after use.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a standby state according to an embodiment.

FIG. 2 is a vertical cross-sectional view of the air supply state of the embodiment.

FIG. 3 is a vertical cross-sectional view of the suction state of the embodiment.

FIG. 4 is a vertical cross-sectional view showing a state in which the treatment tool of the embodiment is used.

FIG. 5 is a side view of the endoscope of the embodiment.

[Explanation of symbols]

 6 channel 11 air supply pipe 12 suction pipe 41 cylinder body 43 piston body 45 shaft hole (passage) 55 forceps plug 100 treatment tool

Claims (1)

[Claims] 1. An air supply pipe connected to an air supply device and a suction pipe connected to a suction device are connected to a cylinder body, and a base end of a channel opening to a distal end of an insertion portion of an endoscope is connected to the cylinder body. Connected to the bottom of the cylinder body, and the piston body is axially moved back and forth in the cylinder body so as to switch the connection state of the air supply pipe and the suction pipe with respect to the channel. A forceps plug opened by the insertion is formed on the head of the piston body, and a passage for guiding the treatment instrument inserted from the forceps plug into the channel is formed in the piston body. Pipeline switching device for endoscopes.