JPH0824666B2 - Suction line switching device for endoscope - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an endoscope suction line switching device, and more particularly,
The present invention relates to a suction channel switching device for an endoscope having two forceps channels.

[Prior Art] There have been various types of suction tube switching devices for endoscopes having two forceps channels.

(A) In the one disclosed in Japanese Utility Model Publication No. 50-142387, a piston is fitted in a cylinder connected to two forceps channels through a communication pipe, and the piston is rotated to communicate with the suction means. The forceps channel to be selected was selected.

(B) The one disclosed in Japanese Patent Laid-Open No. 59-20142 has two communication conduits communicating with one of the two forceps channels and one suction conduit communicating with the suction means. The forceps channel communicating with the suction means is selected by rotatably providing a switching cock having a T-shaped connection hole and a T-shaped communication hole at the connection portion.

(C) In the device disclosed in Japanese Patent Laid-Open No. 60-137344, one forceps channel is communicated with the suction means, and a communication conduit for communicating the two forceps channels is provided so that both forceps channels are connected to each other. It was possible to suck at the same time.

[Problems to be Solved by the Invention] In the above-mentioned conventional suction pipe line switching device for an endoscope, (a) the device of Japanese Utility Model Application Laid-Open No. 50-142387 is capable of performing suction from two channels simultaneously. This is not possible, and it is not possible to clean by rubbing with a brush or the like in the communication pipe that connects the cylinder and the channel, which is inconvenient for hygiene.

(B) In JP-A-59-20142, the inside of the communicating pipe communicating with the switching cock cannot be cleaned by rubbing it with a brush or the like, which is inconvenient for hygiene.

(C) In Japanese Patent Laid-Open No. 60-137344, it is not possible to freely select a channel for suction, and when simultaneously suctioning from both channels, the channel directly connected to the suction means is used. Compared with this, the suction force acting on the other channel was weak, and there was a drawback of being unbalanced.

The present invention has been made paying attention to these circumstances, and it is possible to selectively and evenly suction from either one or both of the two forceps channels, and yet to brush in all the ducts. It is an object of the present invention to provide a suction pipe path switching device for an endoscope, which can be cleaned by inserting and scraping the same.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a suction channel switching device for an endoscope according to the present invention is an endoscope having two forceps channels, and the two forceps are used. Two communication conduits communicating with each one of the channels and one suction conduit communicating with the suction means are connected in a Y shape, and both or one of the communication conduits and the suction conduit are connected. It is characterized in that a switching cock for selectively communicating is provided at the Y-shaped connecting portion.

[Operation] By operating the switching cock, the suction conduit communicates with both or one of the two communication conduits, and suction is performed from the forceps channel communicating with the communication conduit. And since the suction pipe line and the two communication pipe lines are connected in a Y shape,
When performing suction from two forceps channels at the same time, suction pressure is evenly applied to both, and by inserting a brush or the like into the suction conduit, the switching cock and the communication conduit are rubbed with a brush for cleaning. You can

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 to 7.

FIG. 2 is a perspective view around the operation portion of the endoscope. A suction operation valve 3 and an air / water supply operation valve 4 are arranged side by side on the upper front part of the grip part 2 of the operation part 1, and the right side part. A bending operation knob 5 is arranged in the. Reference numeral 6 is an eyepiece, and 7 is a suction connection pipe connected to a suction device (not shown).

Reference numeral 8 denotes a flexible insertion portion, which includes the insertion portion 8 and the operation portion 1.
Two forceps insertion ports 9 and 10 are formed in the connection portion with and forceps channels 11 and 12 are connected and connected to the forceps insertion ports 9 and 10, respectively. 13 and 14 are known forceps plugs attached to the forceps insertion port. Reference numeral 15 is a switching cock that switches the communication state between one or both of the two forceps channels 11 and 12 and the suction operation valve 3. Since it is provided diagonally rearward on the right side, it is easy to operate and is easy to see. Is.

FIG. 1 shows the piping of the suction system in the operation unit 1. The suction connection pipe 7 is communicatively connected to the side of the cylinder 3a of the suction operation valve 3, and the bottom of the cylinder 3a and the switching cock 15 are connected.
A suction pipe 16 is connected between and.
Reference numeral 3b is a piston that constitutes the suction operation valve 3, and is detachably provided in the cylinder 3a. Therefore, by removing the piston 3b, the cleaning brush etc. can be removed from the cylinder.
It can be inserted into the suction line 16 from 3a.

Further, the two forceps channels 11 and 12 and the switching cock 15 are connected by communication pipes 17 and 18, respectively, and the communication pipes 17 and 18 and the suction pipe 16 are connected to each other.
It is connected to 5 in a Y shape. In FIG. 1, the Y-shape is in an upside-down direction, and the angle sandwiched by the two communication conduits 17 and 18 is an acute angle (for example, 30 degrees).

FIG. 3 shows the structure of the switching cock 15 section. In the figure, 20 is a housing, 21 is a support cylinder housed in the housing 20, a joint ring 23 is integrally screwed to a cylinder 22 positioned by the support cylinder 21, and a nut 24
It is fixed to the housing 20 by. A cock 25 is rotatably fitted in the cylinder 22, and as shown in FIG. 5 showing a VV cross section, two communication pipes 17, 18 are provided.
And the suction line 16 are connected to the cylinder 22 in a Y shape,
The cock 25 is provided with a communication hole 26 that communicates with the three conduits 16, 17, and 18 at the same time.

Returning to FIG. 3, the cock 25 is directly connected to the knob 27, and as shown in FIG. 4, the knob 27 has indicators 28 and 29 displayed for visual confirmation during operation. Again cock 25
A click spring 31 is pressed by a press ring 32 on the square shaft portion 30 so as to rotate integrally with the cock 25. 33 is a protrusion of the click spring. On the other hand, the fixing plate 35 is fixed by the pressing cover 34 screwed to the upper end of the housing 20.
Is pressed and fixed, and a rotation stopping projection 35a protruding downward from the fixed plate is engaged with a concave groove formed in the housing. A hole 36 is formed in the fixing plate 35, and the protrusion 33 of the click spring engages with the hole 36. Therefore, by attaching and detaching the presser cover 34 from the upper end of the housing 20, the cock 25 can be easily attached and detached from the operation portion 1. 38 is an O-ring for sealing.

Next, the operation of the above embodiment will be described with reference to FIGS. 5 to 7.

When the knob 27 is rotated, the cock 25 rotates in the cylinder 22, and clicks are heard at the respective positions shown in FIGS. 5, 6, 7 to stop the cock. In the state shown in FIG. 5, the two communication conduits 17 and 18 and the suction conduit 16 communicate with each other, and suction is performed from the two forceps channels 11 and 12 with equal pressure. In the state of FIGS. 6 and 7, one of the communication conduits 17 and 18 communicates with the suction conduit 16 and suction is performed through one of the two forceps channels 11 and 12. .

Further, as shown in FIG. 7, if the cleaning brush 37 is inserted from the suction pipe line 16 side, the brush 37 is inserted through the cock 25 to the communication pipe lines 17 and 18, and the inside of the pipe line is surrounded. It can be cleaned without rubbing.

A lever or the like may be provided instead of the knob 27 in the above embodiment.

[Effect of the Invention] According to the suction channel switching device for an endoscope of the present invention, it is possible to arbitrarily and selectively suction from both or one of the two forceps channels by operating the switching cock. Since the suction conduit and the two communication conduits are connected in a Y-shape, when performing simultaneous suction from the two forceps channels, they can be sucked with an equal suction pressure from both, and the inside of the conduit can be further suctioned. Since it can be cleaned by rubbing with a brush or the like, it is extremely hygienic.

[Brief description of drawings]

FIG. 1 is a schematic view showing a pipe line of a suction system according to an embodiment of the present invention, FIG. 2 is a perspective view around the operation part thereof, FIG. 3 is a vertical sectional view of a switching cock, and FIG. Similarly, the front view of the knob as viewed from the arrow IV and FIGS. 5 to 7 are sectional views taken along the line V-V in different states. 1 ... Operation part, 3 ... Suction operation valve, 7 ... Suction connection pipe,
11,12 …… Forceps channel, 15 …… Switching cock, 16 ……
Suction line, 17,18 ... Communication line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 59-20142 (JP, A) JP 60-137344 (JP, A) JP 58-182703 (JP, A)

Claims (1)

[Claims] 1. In an endoscope having two forceps channels, two communication channels communicating with each of the two forceps channels and one suction channel communicating with a suction means. A switching cock is connected in a Y shape so that an angle between the two communication pipes forms an acute angle, and a switching cock that selectively communicates both or one of the communication pipes with the suction pipe. A suction line switching device for an endoscope, which is provided at a connecting portion.