JPS5854923A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope with an improved structure of an insertion port of an insertion channel.

Generally, an endoscope has an insertion channel formed therein, which is used to introduce a treatment tool such as forceps into a body cavity. A notch is formed at the insertion opening of this channel to prevent air and dirt from inside the body cavity from leaking out.
A valve is incorporated in which two elastic membranes are stacked so that the notches intersect.
issue). However, with this valve structure, each elastic membrane is damaged by wear when forceps are inserted into the notch and pulled out, and the #J! Oneness is lost. Furthermore, since the valve body is constituted by a relatively thin elastic membrane, it is not possible to thoroughly wipe away dirt and the like from the forceps when the forceps are pulled out.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to improve durability and occlusiveness, and to
It is an object of the present invention to provide an endoscope that can reliably scrub away dirt and the like stuck to a treatment instrument when the treatment instrument is pulled out.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows an endoscope 1, which includes an operating section 2, an insertion section 3, and a light guide cable 4. As shown in FIG. The insertion section 1 has a distal end component 1 connected to the distal end of a flexible tube 5 via a bending tube 6.The bending tube 6 is connected to the bending operation knob 8 of the operation section 2 by a remote control means (not shown). It is curved so that the direction of the tip component 1 can be changed. In addition, an observation window 9 is provided on the tip surface of the tip component r.
Lighting window 10. An insertion hole 12, which will be described later, is provided. Then, the observation window 9 is operated 1t, ? It is connected to the eyepiece section 13 of the operation section 2 via an image guide (not shown) inserted across the insertion section 3 . Further, the illumination window 10 is connected to a light guide (not shown) inserted inside each of the operating section 2, the insertion section 3, and the light guide cable 4. This light guide is a light guide tube 1 of a connector 14 provided at the tip of a light guide cable 4.
5.

Further, the operation unit 2 is provided with an air/water supply switching valve 16 for switching air and water supply to the nozzle 12, a suction switching valve 18 for performing a suction operation through the insertion channel 11, and furthermore, the channel 17 An insertion opening 19 is provided. The channel 17 is formed inside the operating section 2 and the insertion section 3, and allows a treatment instrument 20 such as forceps to be guided into the body cavity.

The insertion opening portion 19 is constructed as shown in FIG. That is, the proximal end of the mouth main body 210 formed into a hollow cylindrical shape is screwed into the main body 22 of the operating section 2 and the attachment is fixed], and the insertion port 11 communicating with the channel 11 is formed by the inside thereof. The 0-mouth main body 21 looks like this.
A tube body 24 is movably fitted into the inside of the book, and a spiral guide groove 25 is formed in the side wall of the tube body 24. A pin 26 protruding from the mouth main body 21 is fitted into the guide groove 25, which allows the tube body 24 to move straight while rotating along the insertion direction of the treatment instrument 20 relative to the mouth main body 21. It constitutes a first guide mechanism for causing 9. The tube body 24 is biased outward by a biasing member made of a coil spring 2r. At the outer end of the tube body 14, there is a relatively thick plate-shaped valve member 28. However, the attachment is fixed, and the tenth valve member 28 moves together with the pipe body 24. Furthermore, the mouth main body 21 is located outside the valve member 28 of the irises.
The circle has a second valve member 2 overlapping the first valve member 28.
9 is provided. This second valve member 29 is fitted into and held by a ring-shaped frame 30 so that it can move together with this frame 30. The frame body 30 is provided with a claw 31 that projects laterally, and this claw S1 is connected to the mouth main body 2.
The guide groove 32 is fitted into a guide groove 32 formed linearly in the inner wall of the treatment instrument 20 along the insertion direction of the treatment instrument 20. tb/guide groove 3
the second valve member 2 by guiding the pawl 31 along the second valve member 2;
A second guide mechanism is configured to linearly move the treatment instrument 9 with respect to the mouth main body J1 without rotating it along the insertion direction of the treatment instrument 20. Note that each of the valve members 374 and 29 is made of an elastic material.

Further, a lid body 33 is detachably attached to the outer end of the mouth main body 21. The lid body 13 directly receives the second valve member 29 to prevent the first and second valve members J 9 from protruding outside the mouth main body 21. Wow.

As a result, the first and second valve members 2g and III are pushed outward by the biasing force of the coil spring 21 and come into close contact with each other as shown in FIG. I'm waiting. Furthermore, the first and second valve members 2
8. Insertion holes 34 each eccentric by the same distance in 29.
．． ill is formed. Each insertion hole 34, JI
In the standby state shown in FIG. 2, S is shifted by 180° and does not match with each other. When the first valve member 28 rotates 180°, they match with each other and the treatment instrument 20 can be inserted.

Further, a through hole 36 is formed in the lid body 33 and corresponds to the second valve member 28, and the treatment instrument 20 can be inserted through this through hole S6.

Next, the insertion channel 1 is inserted through the insertion port 19.
The operation when inserting the treatment instrument 20 into 1 will be explained. First, in the standby state shown in FIG.
The two valve members xg and sit are mutually blocked by the other valve member xg and sit. Moreover, since they are in close contact with each other under the biasing force of the coil spring 21, the insertion port 23 is completely closed.

Therefore, the second valve member 2 is inserted through the through hole 36 of the lid body 31.
Insert the treatment instrument 20 into the insertion hole 35 of 9, apply the photoelectric current to the first valve member 28 and push it in against the biasing force of the coil spring 21. As a result, the first valve member 28 is pushed in together with the tubular body 24. However, in this process, the guide groove 25 and the bottle 2
6, the insertion hole 34 of the first valve member 2J is rotated by the first valve member 2J at a certain push-in position as shown in FIG.
corresponds to and communicates with the insertion hole 15 of the second valve member 29.

Then, the treatment tool 20 is inserted into the channel 1 through the insertion port 23.
1 can be inserted. Note that at this time, only the second valve member is present.

In addition, since the first valve body 28 receives the biasing force of the coil spring 21 when the treatment instrument is inserted and in a good condition,
It is trying to return to the east position while rotating. Brush, insertion hole 34. Even if the insertion holes 34, 315 become worn out and somewhat enlarged due to the force acting to displace the holes 34, 315, the closed state can be ensured.

On the other hand, if the treatment tool 20 is pulled out from the inserted state, the biasing force of the coil spring 27 returns to the original standby state shown in FIG. II is dislodged and closes the insertion port 23.

FIGS. 4 and 5 show other embodiments of the present invention.

In this embodiment, the basic configurations of the valve member 28, second valve member 29, and lid body 33 of the mouth body zxlH are the same as in the above embodiment, but the IIl and l@2 are the same. The guide mechanism that guides the movement of the valve members JIB and III is particularly different. That is, the guide tube 40 is installed concentrically in the mouth main body 21rPl, and the first tube body 41 that holds the first valve member 28 and the second valve member 2g are held on the outer periphery of the guide tube 4#. Another second tube 42 is movably fitted therein, and furthermore, claws 41 are protruded from the inner wall of the first tube 410 and formed in a spiral shape on the outer periphery of the guide tube 40. It engages with the guide groove 44 and moves the first valve member 28 linearly in the insertion direction of the treatment instrument 10 while rotating. Further, a claw 45 is also provided on the inner wall of the second tubular body 4j, and correspondingly, a linear guide groove 4d is provided on the outer periphery of the guide tube 40 along the insertion direction of the treatment instrument 20. 415
By guiding the pawl 45, the second valve member 29 can be moved linearly without rotating. Also, a coil spring 41 that biases the first valve member 28
is wrapped around the outer periphery of the guide tube 40.

By inserting a sealing ring 48 between the guide tube 40 and the first tube body 41 to seal the space between them, dirt, etc. can be prevented from flowing into the outer circumferential side of the guide tube 40 from the insertion port 23 side. This operation is similar to the above embodiment.

As explained above, in the present invention, it is not necessary to provide an insertion hole in each of the pair of valve members that close the insertion port, and to configure the valve body with an elastic membrane that biases the valve members so that the insertion holes are displaced from each other. Therefore, it is easy to create a strong structure that can forcefully squeeze out dirt etc. from the treatment instrument when it is pulled out.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an endoscope showing one embodiment of the present invention;
The figure is a sectional view of the insertion port of the endoscope, FIG. 3 is a sectional view of the insertion port in the operating state 11, and FIG. 4 is a sectional view of the insertion port showing another embodiment of the present invention. FIG. 5 is a cross-sectional view of the insertion port in an operating state. 1-endoscope, 2-operation section, 3-insertion section, 1r...
Channel, 1g...Insertion port, 20-Treatment instrument, 21
- Mouth body, 23... Insertion port, 25-- Guide groove, valve member, 2#-- Second valve member, 11-- Pawl, 12-- Guide groove, 34-- Insertion hole, 15 -・Insertion hole, 41・-1st
tubular body, 42--second tubular body, 43-claw, 44--guide groove, 45--claw, 4#--guide groove, 4r--coil spring.

Claims (1)

[Claims] (1) A rounded and elongated insertion section to be inserted into a body cavity, an operating section connected to the proximal end of the insertion section, and a channel formed inside the insertion section and the operating section through which a treatment instrument is inserted. , a mouth main body having an insertion port provided in the operating section and communicating with the channel, and a mouth main body that is overlapped in the mouth main body so that the overlapping surface thereof is arranged orthogonal to the insertion direction of the treatment instrument, and is movable. A first guide for rotating and moving the first valve member on the inside, the second valve member on the outside, and the first valve member relative to the mouth main body along the insertion direction of the treatment instrument. a second guide mechanism that moves the second valve member relative to the mouth main body without rotating the second valve member along the insertion direction of the treatment instrument; a first mutually coincident insertion hole formed with a second valve member that is further offset in a standby state;
An endoscope comprising: a biasing member that biases the first and second valve members toward a standby position. (2. The endoscope according to claim 1, wherein the valve member is formed of an elastic membrane.