JPS5931206Y2 - Endoscope - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an endoscope equipped with a channel through which a treatment tool such as forceps is inserted.

Generally, in the above-mentioned endoscope, a guide is provided at the outlet of the channel in order to direct the tip of the treatment instrument guided out from the tip of the channel in a desired direction, and this guide is operated using the hand control section of the endoscope. It is operated remotely by wire.

That is, conventionally, as shown in FIG. 1, an inductor 4 is rotatably provided on a shaft 5 in a storage chamber 3 formed at the distal end opening of a channel 2 through which a treatment instrument 1 such as a catheter is inserted.

A groove 7 for guiding the treatment instrument 1 is formed in the guiding surface 6 of the inductor 4.

Further, the inductor 4 is provided with a mounting hole 8 penetrating through the inductor 4 in its width direction, that is, in a pair of side surfaces perpendicular to the guide surface 6, and a bearing 10 is rotatably provided in the mounting hole 8. It is being

The operating wire 12 led out from the insertion passage 11 whose distal end opens into the storage chamber 3 has its distal end fixed to the bearing 10 by brazing or the like.

By the way, according to such a configuration, in order to connect the tip of the operating wire 12 led out to the storage chamber 3 to the bearing 10 provided along the width direction of the inductor 40, the tip of the wire 12 must be connected to the bearing 10 provided along the width direction of the inductor 40. It must be bent at a substantially right angle on one side of the inductor 4.

Then, the entire portion of the operating wire 12 located in the storage chamber 3 bends significantly and comes into pressure contact with the inner wall of the storage chamber 3, resulting in a problem that the operating wire 12 cannot be moved forward or backward smoothly.

In addition, as described above, the tip of the operating wire 12 is connected to the inductor 4.
When the side surface of the inductor 4 is bent at a nearly right angle, an extra space 13 is provided on the side of the inductor 4 in order to store the bent portion in the storage chamber 3, and the upper opening of this space 13a is connected to the upper end of one side of the storage chamber 3. A flange 14 must be provided to close it off.

Then, when the treatment instrument 1 is inserted along the guide surface 6 of the inductor 4, the tip of the treatment instrument 1 hits the flange 14 and enters the space 13, and the treatment instrument 1 is inserted into the storage chamber 3. There was a problem that it became impossible to make the surface stick out.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to connect the tip of the operating wire to the inductor without bending it significantly, so that the operating wire can be smoothly moved forward and backward. To provide an endoscope in which there is no need to provide an extra space in which the tip of a treatment instrument enters the storage chamber.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 2 to 4.

In the figure, reference numeral 21 indicates a hand operation section of the endoscope, and reference numeral 22 indicates an insertion section.

The insertion section 22 consists of a flexible tube section 23, a curved tube section 24, and a distal end component 25, and the curved tube section 24 is connected to the hand operation section 21.
The bending operation can be performed remotely using the angle operation knob 26.

Furthermore, a channel 28 is formed inside the hand operation section 21 and the insertion section 22 of the endoscope, through which a treatment instrument 2T such as a catheter is inserted. can be protruded from the outlet of the tip component 25.

The distal end component 25 is provided with an observation window 30, an illumination window 31, and a storage chamber 32. It is connected to the eyepiece section 33 of the hand operation section 21.

In addition, the illumination window 31 is connected to the hand-operated unit 22 via an illumination transmission optical system (not shown) also installed inside the insertion section 22.
The cable 34 is connected to a light source device (not shown).

Further, the storage chamber 32 has an open end of the channel 28 described above, and the storage chamber 32 has an open end.
An inductor 35 formed to have a width slightly smaller than the width of the inductor 2 is rotatably housed by a shaft 36 passing through the width direction of the proximal end thereof.

The upper surface of the guide element 35 is formed as an inclined guide surface 37, and the guide surface 31 is provided with a guide groove 38 for guiding the distal end of the treatment instrument 27 inserted into the channel 28.

Further, a mounting groove 39 is carved in the guide surface 37 on the side of the guide groove 38, and a coupling member 40 is rotatably connected to the mounting groove 39 at one end by a shaft 41.

The other end of the coupling member 40 is connected to an operating wire 43 led out from an insertion passage 42 whose tip is open to the storage chamber 32, with its tip bent slightly downward.

That is, the operating wire 43 is located inside the inductor 350 in the width direction.

The rear end of this operating wire 43 is connected to an operating knob 44 provided on the hand operating section 21 of the endoscope.
When pulled, it slides toward the hand operation section 21 and the tip of the inductor 35 can be raised.

Next, a case in which the endoscope having the above configuration is used will be described.

First, when inserting the treatment instrument 2γ into the channel 28 of the endoscope inserted into the body cavity, the inductor 35 is laid down in the storage chamber 32 as shown by the solid line in FIG. 27, and insert its tip into the inductor 3.
5 in the guide groove 38 formed in the guide surface 37 of No. 5.

When protruding the treatment instrument 2T from the storage chamber 32, the operation wire 43 is moved by operating the operation knob 44.
By pulling the guide 35 and rotating the guide 35 to raise it as shown by the imaginary line in FIG. 3, the distal end of the treatment instrument 27 can be projected in a desired direction.

By the way, according to the above configuration, the operating wire 43 is rotatably inserted into the mounting groove 39 formed in the guiding surface 31 of the inductor 35 via the coupling member 40 with its tip bent slightly downward. is connected to.

Therefore, the portion of the operating wire 43 located in the storage chamber 32 is in pressure contact with the inner wall of the storage chamber 32.
The operation of advancing and retracting the operation wire 43 through the operation knob 44, that is, the raising and lowering operation of the inductor 35 can be performed smoothly.

Further, by connecting the operating wire 43 to the guiding surface 37 of the inductor 35, there is no need to provide a space on the side of the inductor 350 to accommodate the bent portion of the operating wire 43.

Therefore, the tip of the treatment instrument 27 does not enter the space provided on the side of the inductor 35 as in the conventional case, so the treatment instrument 27 can be reliably projected from the storage chamber 32 into the body cavity. can be done.

In the above embodiment, a mounting groove was formed on the guiding surface of the inductor, and the coupling member was pivotally attached to this mounting groove. The protrusion and the groove may be pivotally connected to each other.

As described above, the present invention allows the operating wire to be led out into the storage chamber while being positioned inside the inductor in the width direction, and to guide the operating wire to the side of the guide groove that guides the treatment instrument on the upper surface of the inductor. Therefore, the tip of the operating wire can be connected to the inductor without significantly bending it.

Therefore, since the operating wire does not come into pressure contact with the wall of the storage chamber in which the inductor is provided, the operating wire can be smoothly moved forward and backward.

In addition, since there is no need to provide a space on the side of the inductor to accommodate the bent portion of the operating wire as in the conventional method, the tip of the treatment instrument may enter the space, and the instrument may be removed from the storage chamber. It has many practical advantages, such as not being unable to eject it.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the distal end component of a conventional endoscope;
4 to 4 show one embodiment of the present invention, FIG. 2 is a perspective view of the entire endoscope, FIG. 3 is a sectional view of the distal end component, and FIG. FIG. 27...Treatment instrument, 28...Channel, 32...Storage chamber, 35...Inductor,
37...guiding surface, 40... coupling member,
43... Operation wire.

Claims (1)

[Scope of utility model registration request] A channel through which the treatment instrument is inserted, a storage chamber formed at the distal end opening of this channel, an inductor provided in the storage chamber so as to be rotatable around an axis perpendicular to the axial direction of the channel, and the inductor. In an endoscope comprising an inductor and an operating wire connected via a coupling member, the inductor has a concave guide groove formed on an upper surface thereof along an extending direction of the channel, and the coupling member The storage chamber is connected to the upper surface of the inductor so as to be rotatable at least vertically to the side of the guide groove on the upper surface of the inductor, and the storage chamber is formed to have a width slightly larger than the width of the inductor. An endoscope characterized in that an opening of an operating wire insertion passage led out to a storage chamber is formed within the width of the storage chamber, and the operating wire is located inward in the width direction of the inductor.