JPS6241015B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an endoscope in which a treatment instrument such as forceps, which is introduced into a body cavity through an insertion channel of the endoscope, can be lifted up and the direction in which the treatment instrument is guided can be selected. The present invention relates to a treatment instrument lifting device.

In general, endoscopes are used not only to simply observe the inside of a body cavity, but also to use the insertion channel to introduce various treatment tools into the body cavity to treat affected areas and collect tissue. be. and,
At the exit of the insertion channel at the tip of the insertion section of the endoscope, a lifting stand is provided to regulate the direction in which the treatment instrument is led out, and by operating this lifting stand with an operating wire, the lifting stand can be rotated, for example. death,
The direction in which the treatment instrument is led out can be selected.
The operating wire is guided to the operating section of the endoscope through a guide tube whose tip is opened in the outlet, and is pushed and pulled by an operating mechanism on the operating section. .

However, in the above structure, a gap inevitably occurs between the operating wire and the guide tube, and since this gap is exposed at the outlet, there is a drawback that dirt and sewage can enter and accumulate in the gap. Such a situation not only hinders the lifting operation, but is also unsanitary and difficult to clean. In particular, if dirty liquid or the like penetrates into the operating section through the gap, the entire operating section must be dismantled and cleaned, which is extremely troublesome.

Also, a large tension is applied to the operating wire during the lifting operation, deforming or bending the flexible guide tube that guides the operating wire, so that the guide tube is not inserted into the endoscope. It has a serious drawback in that it strongly hits the inserted image guide fiber and light guide fiber, damaging them.

The present invention has been made focusing on the above circumstances,
The purpose of this is to use an insertion channel to guide the operating wire without providing a special guide tube for the operating wire, thereby preventing liquids from entering the endoscope body and maintaining hygiene. It is an object of the present invention to provide a treatment instrument lifting device for an endoscope that can be used safely without damaging internal organs such as an image guide or a light guide.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 is an endoscope main body, and this endoscope main body 1 is formed by connecting a flexible insertion section 3 to a hand control section 2, and a light guide cable (not shown) is connected to the hand control section 2. is connected. Insertion section 3 above
is formed by connecting a distal end portion 6 to the distal end of a flexible tube 4 via a curved tube 5, and the curved portion 5 can be operated to bend by operating an angle knob 7 on the hand operation section 2. . Further, an illumination window 8 and an observation window 9 are provided on the distal end surface of the distal end portion 6, and the illumination window 8 is provided with a light guide fiber (not shown) inserted through the insertion portion 3, the hand operation portion 2, and the light guide cable. ) is connected to. The observation window 9 is connected to an image guide fiber 11 via an objective lens 10 as shown in FIG. It is connected to the eye part 12.

Furthermore, a flexible tube 14 having an inner hole that forms an insertion channel 13 is inserted through the hand operation section 2 and the insertion section 3. As shown in FIG. 2, the distal end portion of the tube 14 is fitted and fixed in a liquid-tight manner into a through hole 16 penetrating the main body 15 of the distal end portion 6.

Further, a raising chamber 17 is provided at the distal end portion of the through hole 16 forming the distal end portion of the insertion channel 13, that is, at the distal end exit of the insertion channel 13.
is formed. A lifting table 19 is pivotally attached to the lifting chamber 17 to determine the direction in which a treatment instrument 18 such as forceps is led out. The lower end of the elevating table 19 is pivotally attached to the bottom of the elevating chamber 17 via a shaft 20, and the rotating end thereof is provided so as to be freely foldable in correspondence with the opening at the tip of the through hole 16. Further, as shown in FIG. 3, the tip of an operating wire 21 is connected and fixed to the rotating end side wall of the elevator 19.
As shown in FIG. 2, the operating wire 21 is inserted and guided toward the hand operating section 2 by an insertion channel 13.

On the other hand, the proximal end of the tube 14 is inserted and fixed into an insertion opening 22 provided in the hand operation section 2, as shown in FIG. Further, an annular operating knob 23 is attached to the outer periphery of the protruding tip of the insertion opening 22 so as to be able to move forward and backward. A proximal end of an operating wire 21 guided through the insertion channel 13 is connected and fixed to this operating knob 23. That is, the insertion port 22 constitutes an operating mechanism that pushes and pulls the operating wire 21.
Note that a guide hole 2 is provided on the inner circumferential surface of the outer end of the insertion opening portion 22, through which the operating wire 21 is inserted and supported so that it can move forward and backward.
4 is provided.

Further, as shown in FIG. 4, a branch pipe 25 is connected to the tube 14 in the hand-held operation unit 2, and this branch pipe 25 is guided to the suction device (not shown) through the light guide cable. It's summery.

Next, a method of using the treatment instrument lifting device will be explained.

First, before inserting the treatment instrument 18 into the insertion channel 13, the operation knob 23 is operated on the hand operation section 2 to push the operation wire 21 forward. As a result, the elevator platform 1 of the elevator room 17
9 is pushed down as shown in FIG. and,
In this state, the treatment instrument 18 can be inserted through the insertion channel 13 and protruded substantially forward into the body cavity from the opening of the elevating chamber 17.

Next, when raising the treatment instrument 18, as shown in FIG. 4, the operation knob 23 is used to raise the raising table 19 via the operation wire 21, thereby raising the distal end of the treatment instrument 18. be able to.

The operating mechanism for advancing and retracting the operating wire 21 is not limited to that of the embodiment described above, but may be of any other type, such as using a rack and pinion.

As explained above, in the present invention, since the operating wire for operating the elevator is inserted through the insertion channel and guided, there is no need to provide a special guide tube for guiding the operating wire for operating the elevator.
The configuration can be simplified and the diameter can be reduced. Furthermore, liquid in the body cavity does not enter the endoscope body through the guide tube, which is sanitary and eliminates the problem of having to take the trouble of disassembling the endoscope body for cleaning.

In addition, as mentioned above, since there is no need to provide a guide tube to guide the operation wire for the lifting operation, there is no need to forcefully hit other internal objects, such as the image guide fiber or the light guide fiber, and damage them. The durability of the endoscope can be improved accordingly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of the entire endoscope, Fig. 2 is a side sectional view of the vicinity of the distal end of the insertion section, and Fig. 3 is a connection between the elevator and the tube. FIG. 4 is a perspective view showing the state, and FIG. 4 is a side sectional view of the operating mechanism portion of the hand operating section. 1...Endoscope main body, 2...Hand control unit, 13...
...Insertion channel, 17...Elevating chamber, 18...
Treatment instrument, 19... Elevating platform, 21... Operation wire,
22...Insertion port section, 23...Operation knob.

Claims (1)

[Claims] 1. A channel for inserting a treatment instrument is formed in the endoscope body, and a raising table for selecting the direction in which the treatment instrument is led is installed in a raising chamber formed at the outlet on the distal end side of the channel for inserting a treatment instrument, In an endoscope treatment tool lifting device in which the lifting table is remotely controlled from the hand control unit side using an operating wire, the operating wire, one end of which is connected to the lifting table, is inserted into a channel for inserting the treatment instrument. A treatment instrument lifter for an endoscope, characterized in that the operating wire is inserted through the operating wire and guided to a hand operating section, and the other end of the operating wire is connected to an operating mechanism provided near the hand operating section for advancing and retracting the operating wire. Device.