JP2000000209A - Treating tool raising-up device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the smooth operation of a tip chip by forming a drain path communicating to the middle part of a connection hole at a treating tool raising-up table in the connection hole capable of freely rotatably inserting the tip chip, so as to reduce influence by mucus, excreta liquid, or the like, in a celom. SOLUTION: At the treating tool raising-up table 10, the drain path 20 in the shape of a hole communicating to the middle part of the connection hole 16 is formed at a position which does not interfere with a treating tool passing surface 10a. Consequently, even when the mucus, excreta liquid, or the like, in the celom enter the fitting part of the tip chip 15 and the connection hole 16, they are discharged from the path 20. Thus, since washing water which gets into and out from the path 20 easily gets into and out from the fitting part at the time of washing the endoscope after using, the tip chip 15 is not fixed in the hole 16. As a result of it, the tip chip 15 is always freely rotated in the hole 16 by following the back-forth moving operation of an operation wire 13 to make the wire 13 and the table 10 in the state of being connected in a proper direction reducing the transmitting loss of force, thereby the table 10 operates smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool raising device for an endoscope provided with a treatment tool raising table for changing a projecting direction of a distal end portion of a treatment tool passed through a treatment tool insertion channel.

[0002]

2. Description of the Related Art In general, at the distal end of an insertion portion of a side-viewing type endoscope, a treatment instrument raising table for changing a projecting direction of a distal end portion of a treatment instrument passed through a treatment instrument insertion channel is swingable. , And is rocked by an operation wire that is remotely moved forward and backward.

[0003] The distal end of such an operating wire is bent at a substantially right angle, and the distal tip fixed thereto is inserted rotatably around an axis into a connecting hole formed in the treatment instrument raising base so as to be rotatable around the axis. The wire is connected to the treatment instrument raising stand.

[0004]

Since the treatment instrument raising table is disposed at the distal end of the insertion section of the endoscope, mucus and contaminants in the body cavity adhere to the connection hole each time it is used. When the tip enters the fitting portion with the tip and remains, the tip tip may be difficult to rotate in the connection hole.

[0005] Then, of the forces transmitted from the operation wire to the treatment instrument raising table, the force acting in the direction of swinging the treatment instrument raising table becomes smaller, so that the treatment instrument raising table cannot be rocked to a predetermined position. This causes the treatment tool to be unable to protrude smoothly.

Accordingly, the present invention provides a treatment tool for an endoscope which can maintain a smooth operation with less influence of mucus and filth in the body cavity on a connecting portion between an operation wire and a treatment tool raising stand. It is intended to provide a raising device.

[0007]

In order to achieve the above object, a treatment instrument raising apparatus for an endoscope according to the present invention changes a projecting direction of a distal end portion of a treatment instrument passed through a treatment instrument insertion channel. A treatment tool raising table for swinging is disposed so as to be swingable, and a distal tip fixed to the distal end of an operation wire that is remotely advanced and retracted in a direction substantially perpendicular to the tip is connected to the treatment tool raising table. In the treatment instrument raising device for an endoscope inserted into the hole so as to be rotatable around an axis, a drainage path communicating with an intermediate portion of the connection hole is formed in the treatment device raising table.

[0008] The drain passage may be formed in a hole shape, or the drain passage may be formed in a slit shape. Further, the drainage path may be formed in a cutout shape obtained by cutting out the treatment instrument raising stand.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a plan view of the treatment tool raising device for an endoscope according to the first embodiment of the present invention, in which a distal end portion of an insertion portion 1 covered with a flexible tube is provided with a metallic distal end main body. 2 are connected, and an electrically insulating tip cap 3 is attached so as to cover the outer surface thereof.

This endoscope is of a so-called side-view type, in which an observation window 5 and an illumination window 6 are arranged side by side on the side of the distal end body 2, and a nozzle capable of selectively blowing air and water. An opening 7 is arranged toward the surface of the observation window 5.

A groove 8 for accommodating the treatment instrument raising table 10 is formed in the distal end body 2 in a positional relationship with the observation window 5 and the illumination window 6 with the axis interposed therebetween. As shown in FIG. 1, which is a side cross-sectional view of a cross section including the treatment tool raising table 10, the distal end of the treatment tool insertion channel 9 is connected to the back of the groove 8, and is inserted through the treatment tool insertion channel 9. The distal end portion of the treatment instrument is guided into the groove 8.

The treatment instrument raising table 10 is disposed in the groove 8 so as to be swingable about a shaft 11 supported by the distal end main body 2.
It is connected to the treatment instrument raising stand 10 at a position away from the shaft 11.

The operating wire 13 is bent at a substantially right angle in the vicinity of the distal end, and a stepped cylindrical metal distal tip 15 is fitted to a portion ahead of the bent portion. It is fixed by brazing or the like.

As shown in FIG. 2, the outer peripheral surface of the distal tip 15 is formed in a stepped shape having a large outer diameter near the distal end. The connection hole 16 having a shape and size that fits loosely into the shaft 11
It is drilled in the direction parallel to.

Therefore, the distal tip 15 inserted into the connecting hole 16 is rotatable around the axis, and the distal tip 15 does not fall out of the connecting hole 16 even when the operation wire 13 is pushed or pulled.

As a result, when the operation wire 13 is moved forward and backward from a not-shown operation portion, the treatment instrument raising table 10 swings around the shaft 11 and is projected outward from the groove 8. The protruding direction of the treatment tool can be arbitrarily changed.

As shown in FIGS. 1 and 2 and FIG. 3 which is a front view of the treatment tool raising table 10, the treatment tool raising table 10 communicates with an intermediate portion of the connection hole 16. A hole-shaped drainage path 20 is formed at a position that does not interfere with the treatment instrument passage surface 10a.

Therefore, the tip 15 and the connecting hole 16
Even if mucus and contaminants in the body cavity enter the fitting portion with the water, they are discharged from the drainage passage 20, and at the time of endoscope cleaning after use, the washing water flowing into and out of the drainage passage 20 enters the fitting portion. The tip tip 15 does not adhere in the connection hole 16 because it easily enters and exits.

As a result, the distal end tip 15 always rotates freely within the connection hole 16 following the advance / retreat operation of the operation wire 13, and the operation wire 13 and the treatment instrument raising table 10 are properly connected with a small power transmission loss. The treatment instrument raising base 10 is smoothly operated.

FIG. 4 is a front view of the treatment instrument raising table 10 according to the second embodiment of the present invention. The drainage path 20 is elongated in the axial direction of the connecting hole 16 over the entire width of the treatment instrument raising table 10. It is formed in a slit shape. The side sectional view is exactly the same as FIG. The configuration of the other parts is the same as that of the first embodiment.

When the drainage path 20 is formed in a slit shape over the entire width of the treatment instrument raising table 10 as described above, the cleaning performance of the fitting portion between the distal end tip 15 and the connection hole 16 is further improved. However, it is necessary to make the slit width smaller than the diameter of the connection hole 16 in order to prevent the tip 15 from dropping out of the connection hole 16 through the drain passage 20.

In the first and second embodiments, the drainage path 20 may be formed at a position that opens on the back surface of the treatment tool raising table 10 (the side opposite to the treatment tool passage surface 10a).

FIG. 5 is a front view of a treatment instrument raising table 10 according to a third embodiment of the present invention, in which a drainage path 20 is cut away at an intermediate portion on the back side of the treatment instrument raising table 10. It is formed in a shape.

The depth of the notch of the drainage passage 20 traverses the middle part of the connection hole 16 as shown in FIG.
Since the distal end tip 15 and the connection hole 16 are fitted only at both ends and the portion between them is largely cut away, the fitting portion has very good cleaning properties, and the operation of the treatment instrument raising table 10 is performed well. Secured.

[0025]

According to the present invention, the drainage passage leading to an intermediate portion of the fitting portion between the distal end tip fixed to the distal end of the operation wire and the connection hole is formed in the treatment instrument raising base, so that the fitting can be performed. Even if mucus or contaminants in the body cavity enter the part, they are discharged from the drainage path, and when the endoscope is cleaned after use, the washing water that enters and exits the drainage path easily enters and exits the fitting part. The erecting base can maintain a smooth operation.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view in a cross section including a treatment instrument raising table of a distal end portion of an endoscope according to a first embodiment of the present invention.

FIG. 2 is a plan view of a distal end portion of the endoscope according to the first embodiment of the present invention.

FIG. 3 is a front view of a treatment instrument raising base according to the first embodiment of the present invention.

FIG. 4 is a front view of a treatment instrument raising base according to a second embodiment of the present invention.

FIG. 5 is a front view showing a cross section of a part of a treatment instrument raising base according to a third embodiment of the present invention.

FIG. 6 is a side sectional view of a treatment instrument raising stand according to a third embodiment of the present invention.

[Explanation of symbols]

 2 distal end body 9 treatment instrument insertion channel 10 treatment instrument raising stand 13 operation wire 15 tip tip 16 connection hole 20 drainage path

Claims (4)

[Claims] 1. A treatment instrument raising base for changing a projecting direction of a distal end portion of a treatment instrument passed through a treatment instrument insertion channel is swingably disposed at a distal end of an operation wire which is remotely advanced and retracted. A treatment tool raising device for an endoscope in which a distal tip fixed at a substantially right angle and fixed is inserted rotatably around an axis into a connection hole formed in the treatment tool raising table. A treatment tool raising device for an endoscope, wherein a drainage path communicating with an intermediate portion of the hole is formed in the treatment tool raising table. 2. The treatment tool raising device for an endoscope according to claim 1, wherein the drainage path is formed in a hole shape. 3. The endoscope treatment instrument raising apparatus according to claim 1, wherein the drainage path is formed in a slit shape. 4. The treatment tool raising device for an endoscope according to claim 1, wherein the drainage path is formed in a notch shape in which the treatment tool raising table is cut out.