JPH0715522Y2 - Endoscopic forceps plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a forceps plug for an endoscope for closing an insertion port communicating with a treatment instrument channel in an endoscope.

[Conventional technology]

Generally, in medical examinations and operations using an endoscope, various treatments such as injecting a drug solution into the patient's body through the endoscope and excising / collecting a lesion site are performed. In order to perform these treatments, the endoscope is provided with a treatment tool channel through which various treatment tools such as forceps are inserted.

However, due to changes in pressure inside the body cavity, dirt and air inside the body cavity may leak out of the treatment instrument insertion port through the treatment instrument channel. For this reason, a so-called forceps plug is provided at the mouthpiece portion of the treatment instrument insertion port communicating with the treatment instrument channel to prevent dirt and air from leaking.

In general, this forceps plug is made of an elastic member such as rubber, has a partition membrane provided with a slit that is normally closed for inserting the treatment instrument, and is attached to the treatment instrument insertion port. This partition film projects on the side of the treatment instrument insertion port with almost the same thickness to form a mountain-shaped protrusion, and the mountain-shaped protrusion has a slit with a height lower than the height of the mountain-shaped protrusion and the mountain-shaped protrusion. It is known that the outer diameter of the protruding portion is cut to the same diameter. (Actual No. 64-26004) [Problems to be solved by the invention] However, when the treatment tool is repeatedly inserted and removed through the slit of the partition membrane part, when the treatment tool pushes the slit open,
A force is applied in the direction perpendicular to the slit cutting direction and the direction in which the treatment tool is inserted. For this reason, a crack may be formed from the root portion of the slit, the airtightness and watertightness of the forceps plug may be impaired, or the crack may gradually expand and the thin-walled portion may drop off. Also, since the slit cut was small, the slit did not open completely when liquid was delivered by inserting the syringe, and the liquid was exuded or overflowed between the partition membrane and the syringe, resulting in a treatment instrument channel. The liquid transfer property to was very poor.

The present invention has been made in view of the above problems, and its purpose is to ensure the airtightness and watertightness of forceps plugs, to prevent the thin-walled part from falling off, and to deliver liquid during syringe delivery. An object is to provide a forceps plug for an endoscope that can be improved.

[Means for solving problems]

The present invention has a partition membrane attached to a treatment instrument insertion opening of an endoscope and provided with a slit that is normally closed, and the partition membrane protrudes toward the treatment instrument insertion opening side with substantially the same thickness. The mountain-shaped protrusion is formed by forming a slit in the mountain-shaped protrusion, at least a part of which is larger than the outer diameter of the mountain-shaped protrusion and deeper than the height of the mountain-shaped protrusion, and is formed in the slit forming direction. On the other hand, it is formed diagonally at the base of the slit, and this base is made to have an inner diameter slightly smaller than the outer diameter of the tip of the syringe to be inserted, so that it has a portion without slit notch. It is configured.

[Action]

When the syringe is inserted, the forceps plug of the present invention is inserted up to the root part in front of the mountain-shaped protruding part and sealed at that part, and when the liquid is delivered, the slit is greatly expanded and the liquid is delivered without leaking out. Further, even if a force perpendicular to the slitting direction is applied to the slit, the force can be dispersed in the thick portion, and the slit does not crack or fall off.

〔Example〕

1 to 5 show a first embodiment of the present invention. FIG. 1 shows the entire endoscope, and this endoscope is provided with an operating section 1. The operation unit 1 is provided with a treatment instrument insertion port body 7 having an eyepiece unit 2, an angle knob 3, a suction control device 4, and a treatment instrument insertion port 6 for inserting a treatment instrument such as forceps. Further, a universal cord (not shown) and the insertion section 5 are connected to the operation section 1. The tip of the universal cord is connected to a light source (not shown).

On the other hand, a curved portion 5a is formed at the distal end side portion of the insertion portion 5,
The bending portion 5a can be remotely bent by operating the angle knob 3. The treatment instrument insertion port body 7 is connected to the other end of the treatment instrument channel, one end of which is opened at the tip of the insertion portion 5 through the operation portion 1 and the insertion portion 5. The treatment instrument insertion port body 7 is provided with a forceps plug 8 that closes the treatment instrument insertion port 6.

2 to 4 show the forceps plug 8, FIG. 2 is a view of the forceps plug 8 seen from above, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. The forceps plug 8 is attached to the treatment instrument insertion port body 7, and the treatment instrument insertion port 6 is attached.
Shows the state of closing the. The forceps plug 8 is composed of a main body portion 9 integrally formed of an elastic member such as silicon rubber, fluororubber, nitrobutyl rubber, etc., a cap portion 10, and a connecting portion 11 for connecting the both.

The main body 9 has a cylindrical shape with a small diameter in the upper part and a large diameter in the lower part, and a part of the outer circumference of the upper part is formed in a tapered shape. Body 9
A first recess 12 is formed in the upper part of the, and a second recess 13 is formed in the lower part. The first recess 12 and the second recess
The space between 13 is partitioned by a partition wall 14.

The cap portion 10 is formed in a cylindrical shape, and an arc-shaped first partition film 15 is integrally provided therein, and a (-)-shaped first slit is formed in the center of the first partition film 15. 16 is formed in the same direction as the mounting direction of the connecting portion 11, and is usually the first
The partition film 15 is closed by the elastic force of the partition film 15 itself.

The chamfered flange portion 17 is provided on the outer peripheral surface of the cap portion 10.
The flange portion 17 is adapted to be airtightly fitted into the cap fitting annular groove 18 formed in the main body portion 9.

On the other hand, the partition wall 14 of the main body portion 9 has a second partition film 19 located in the central portion. As shown in FIG. 3, the second partition film 19 has a mountain-shaped protruding portion 20 protruding in a mountain-shaped shape on the side of the treatment instrument insertion port 6 side. The mountain-shaped protruding portion 20 is thin and formed to have substantially the same thickness, and the outer diameter portion 21 thereof is in contact with the inlet inner surface 22 of the treatment instrument insertion port 6. On the other hand, the mountain-shaped protrusion 20
The inner surface of the is formed into a flask shape, the diameter of which is narrowed toward the partition wall 14, and an annular syringe abutting portion 23 is formed to which the tip of the syringe inserted beyond the first partition membrane 15 abuts. There is. The upper portion of the syringe abutting portion 23 is formed with a diameter smaller than the outer diameter of the tip of the syringe so that the tip of the syringe can be sealed in a watertight manner to form a syringe seal portion 24.

A second slit 25 is cut in the mountain-shaped protruding portion 20 in a direction orthogonal to the first slit 16, and is usually the second slit 25.
The slit 25 is closed by the elastic force. The second slit 25 is formed in a taper shape such that its upper width is narrowed from the lower surface side of the partition wall 14 following the root portion 26 of the mountain-shaped protruding portion 20 to the front side of the syringe seal portion 24. The wide part of the second slit 25 is larger than the outer diameter A of the mountain-shaped protrusion 20 and the depth of the slit 25 is the mountain-shaped protrusion 20.
Is formed deeper than the height B. However, the slit 25 is not cut in the syringe seal portion 24.

In the forceps plug 8 for an endoscope described above, when a treatment tool such as forceps (not shown) is inserted into the treatment channel, the tip of the treatment tool is pressed against the upper surface of the first partition film 15 of the cap portion 10. Then, the first slit 16 of the first partition film 15 of the cap portion 10 is pushed open and the second slit 25 of the mountain-shaped protruding portion 20 of the main body portion 9 is pushed open to insert the treatment instrument. The treatment instrument channel can be inserted through the mouth 6. Further, in order to remove the treatment instrument inserted through the treatment instrument channel, the treatment instrument is inserted into the first partition membrane.
15. Pull out against the elastic force of the mountain-shaped protrusion 20.

FIG. 5 is a side sectional view showing a state in which the syringe 27 is inserted through the forceps plug 8. To insert the syringe 27 into the forceps plug 8 and feed the liquid, the tip of the syringe 27 is pressed against the first partition film 15 of the cap portion 10 and the first slit 16 is opened.
Further, the syringe 27 is pressed, and the tip end portion of the syringe 27 is abutted against the syringe abutting portion 23 formed on the partition wall 14 of the main body 9 to deliver the liquid. At this time, the tip of the syringe 27 is water-tightly sealed by the syringe seal portion 24. Then, the second slit 25, which is closed by the elastic force of the mountain-shaped protruding portion 20 due to the liquid feeding from the syringe 27, spreads by the pressure of the liquid feeding, and the liquid is fed into the treatment instrument channel through the widened gap.

Further, the second slit 25 of the mountain-shaped protruding portion 20 is larger than the outer diameter A of the mountain-shaped protruding portion and deeper than the height B thereof, and is slit in a taper shape toward the thick partition wall 14. Therefore, even if a force is applied in a direction perpendicular to the slit 25 by inserting a treatment tool such as forceps, the force in the vertical direction can be dispersed in the thick portion. Furthermore, since the slit 25 is large,
The slit is easy to open. Therefore, even if the treatment tool is repeatedly inserted and removed, there is no concern that the slit 25 will be cracked or fall off due to the concentration of the force for expanding the slit 25 on the root portion 26 of the thin-walled mountain-shaped protrusion 20. Further, even when the syringe 27 is inserted and liquid is fed, the tip of the syringe 27 is reliably sealed, and the slit 25 is easily opened, so that the liquid can be fed easily. Therefore, the slit 25 remains closed, the pressure between the first partition film 15 and the second partition film 19 becomes too high, and the cap portion 10 does not come off. Further, since the forceps plug 8 has a double slit structure, it has high watertightness and airtightness.

FIG. 6 is a sectional view showing a second embodiment of the present invention.
The same components as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted. The second embodiment is a modification of the second slit 25, and the slits have the same slit cutting direction as the first slit 16, and the partition wall 14 is circularly cut from the lower surface side to the upper surface side. Other configurations are similar to those of the first embodiment.

FIG. 7 is a sectional view showing a third embodiment of the present invention. The forceps plug 30 of the third embodiment is attached to the treatment instrument insertion port body 7 to close the treatment instrument insertion port 6. The main body 31 has a cylindrical shape with a small diameter in the upper part and a large diameter in the lower part, and a part of the outer periphery of the upper part is tapered. A syringe (not shown) is inserted in the center of the main body portion 31, an elongated syringe seal hole portion 32 for sealing the syringe is formed, and an annular syringe abutting portion 33 on which the tip of the syringe abuts is formed in the lower portion thereof. Are formed. A recess is provided at the bottom of the main body 31.
34 is formed so as to engage the flange of the treatment instrument insertion port body 7 and lock the forceps plug 30.

On the other hand, on the lower side of the syringe abutting portion 33, a thin mountain-shaped mountain-shaped protruding portion 35 having a substantially uniform thickness is formed in the concave portion 34, and a slit 36 similar to that of the first embodiment is formed. There is.

According to the third embodiment, since the syringe seal hole portion 32 is long, the syringe and the forceps plug 30 can be reliably sealed, and the liquid cannot be easily leaked from between the syringe and the forceps plug. Also,
Since it is not divided into the cap portion and the main body portion, it is easy to manufacture and inexpensive.

The forceps plug of the present invention is not limited to the endoscope as shown in FIG. 1, and is also used as a forceps plug for a treatment instrument insertion port of an electronic endoscope having a solid-state image sensor at the tip. Of course you can.

[Effect of device]

According to the present invention, the slit provided in the mountain-shaped protrusion is at least partly larger than the outer diameter of the mountain-shaped protrusion, is deeper than the height of the mountain-shaped protrusion, and is the root of the slit in the forming direction of the slit. It is formed diagonally, and the root part has an inner diameter slightly smaller than the outer diameter of the syringe tip to be inserted and has a portion without slit slits, so insert a treatment tool such as forceps Even if a force is applied in a direction perpendicular to the slit cut, the force can be dispersed not only in the thin partition film but also in the thick portion, and the slit can be formed large, so that the slit can be easily opened. Therefore, even if the treatment tool is repeatedly inserted and removed, the force of spreading the slit is concentrated on the root of the thin-walled mountain-shaped protrusion, and there is no concern that the slit will crack or fall off. In addition, even if a syringe is inserted and liquid is delivered, the tip of the syringe is reliably sealed, and the slit is easily opened, so it is easy to deliver the liquid, and the slit remains closed from between the syringe and the forceps plug. There is no leakage of liquid.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention, FIG. 1 is an overall view of an endoscope, and FIG. 2 is a view of a forceps plug seen from above,
3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV- in FIG.
IV sectional view, FIG. 5 is a side sectional view showing a state in which a syringe is inserted through a forceps plug, FIG. 6 is a sectional view showing a second embodiment of the present invention, and FIG. 7 is a third embodiment of the present invention. It is sectional drawing shown. 6 ... Treatment tool insertion port, 8, 30 ... Forceps plug, 15 ... First partition film, 19 ... Second partition film, 20 ... Mountain-shaped protrusion, 24 ... Syringe seal part, 25 …… Slit, 26 ……
Root, 27 ... syringe.

Claims (1)

[Scope of utility model registration request] 1. A forceps plug for an endoscope, which is attached to a treatment instrument insertion opening of an endoscope and includes a partition membrane having a slit that is normally closed, wherein the partition membrane is substantially on the treatment instrument insertion opening side. It is formed as a mountain-shaped protrusion with the same thickness as the mountain-shaped protrusion, and the slit is at least partly larger than the outer diameter of the mountain-shaped protrusion, deeper than the height of the mountain-shaped protrusion, and the slit forming direction. It is characterized in that it is formed obliquely at the root part of the slit, the root part is formed with an inner diameter slightly smaller than the outer diameter of the syringe tip to be inserted, and the slit has no cut portion Endoscope forceps plug