JPS6137936B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in forceps plugs for endoscopes.

For example, when observing the inside of the bile duct with a biliary fiberscope, physiological saline is pumped into the bile duct through the scope's mouthpiece that leads to the forceps hole or through another water supply hole, etc. to remove bile turbidity in the bile duct and improve the field of view. Observe while ensuring transparency.
However, if the forceps opening remains open, the physiological saline that has been pumped into the forceps may leak from the forceps opening, and especially during surgery, the saline may flow into the surgical field and contaminate the surgical field. be.

For this reason, the forceps opening is provided with packing to prevent the physiological saline from flowing out. However, when inserting forceps or the like, the forceps opening must be opened, and on the other hand, after insertion, it must be sufficiently closed to prevent leakage of physiological saline.

Conventionally used packing is an elastic ring, which is compressed by an operating member having a tapered end surface to reduce the inner diameter of the ring and close the ring.

However, since this conventional structure is closed by crushing a ring made entirely of a single elastic body, the amount of force required for its operation is extremely large, and sometimes The ring may not close sufficiently and leakage may occur. Furthermore, because the operating member is operated so forcefully, other fastening parts may unnecessarily loosen and come off.

It is also known that a notch is provided in an elastic plate, but this method makes it difficult to obtain a sufficient occluded state, and since the opening is made by pushing the treatment tool itself, for example, a balloon catheter may be damaged. Cheap.

The present invention has been made based on the above-mentioned circumstances, and its purpose is to reduce the amount of operating force and improve the sealing performance through a simple structure, and to provide a durable forceps plug for an endoscope. Our goal is to provide the following.

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

In FIG. 1, reference numeral 1 indicates the operating section main body of the endoscope, and numeral 2 indicates a forceps opening projecting from the operating section main body 1 and integrally formed. A forceps mouth main body 3 is detachably attached to the forceps mouth part 2. That is, the forceps mouth main body 3 is attached to the forceps mouth 2 via the fixing ring 4, and an elastic ring 5 is interposed between the forceps mouth 2 and the forceps mouth main body 3, and It is now possible to connect them airtightly. Further, the hole portion 6 of the forceps mouth main body 3 communicates with the forceps hole 7 of the forceps mouth portion 2. The fixing ring 4 is configured to be connected to the forceps opening 2 by screwing.

Further, a large diameter portion 8 having an inner diameter larger than other portions is formed in the middle of the hole 6 of the forceps mouth main body 3, and an elastic tube 9 is stretched over this large diameter portion 8. There is. That is, both ends of the elastic tube 9 are fixed to the front and rear ends of the large diameter portion 8, respectively, so that the forceps hole 7 is continuously formed as a part of the hole 6. Furthermore, a linear flexible binding member 10 is wound around the elastic tube 9. One end of the binding member 10 is attached and fixed to a support 11 fixedly installed in the large diameter portion 8, and the other end of the binding member 10 is attached to a through hole 12 formed in the side wall of the forceps mouth main body 3.
It is connected to an operating ring 13 which will be described later.

Further, the above-mentioned binding member 10 is shown in FIGS. 7 and 8.
As shown in the figure, it is made of a flexible plate, and is particularly formed into an elongated trapezoidal shape. The longer end portion is supported by a supporting column 11, and the middle portion is wrapped around the elastic tube 9. Further, the short width side portion is inserted into a long hole 14 formed in the middle of the binding member 10. Furthermore, the binding member 1
The short width side extending tip portion of 0 is connected to the operation ring 13 through the through hole 12 .

Further, on the outer periphery of the forceps mouth main body 3, the cylindrical operating ring 13 is provided which is rotatable in the circumferential direction.
Furthermore, both the front and rear ends of the operation ring 13 and the forceps mouth body 3
O-rings 15 and 16 are inserted between them, respectively, to maintain airtightness of the inner portion of the operating ring 13. That is, the inner portion of the operating ring 12 communicates with the large diameter portion 8 of the forceps mouth body 3 through the through hole 12, but is completely isolated from the outside. Therefore, it is possible to prevent dust and sewage from entering the inside.

Next, the function of the forceps plug of the above embodiment will be explained.

First, FIG. 1 shows a state in which the forceps hole 7 is opened. That is, the binding member 10 wound around the elastic tube 9 is loosened, so that the elastic tube 9 is in a state where it swells and opens under its own elastic restoring force. Further, FIG. 2 also shows the same state. Therefore, the treatment tool 17 such as forceps can be freely taken in and out.

On the other hand, when the forceps hole 7 is to be closed, the binding member 10 is pulled out by rotating the operating ring 13 in the direction in which the binding member 10 is wound, as shown in FIGS. 3 and 4. Thus, the binding member 10 strongly tightens the elastic tube 9 as shown in FIGS. 3 and 4, and the elastic tube 9 is bound and crushed, so that the elastic tube 9 can be closed. Note that since the O-rings 15 and 16 are compressed between the operating ring 13 and the forceps mouth body 3, a frictional force is generated and they do not return to their original positions even by the restoring force of the elastic tube 9. .

On the other hand, if the same operation is performed with the treatment tool 17 such as forceps inserted, it is possible to close the treatment tool 17 in the inserted state as shown in FIGS. 5 and 6. In other words, leakage of physiological saline and the like can be prevented during surgery. Note that when it is desired to advance or retreat the treatment instrument 17, the operation ring 13 is returned slightly to weaken the force binding the elastic tube 9, thereby preventing leakage of physiological saline or the like, or allowing the treatment instrument 17 to be advanced or retreated in a state with less leakage. is possible.

As explained above, in the present invention, an elastic tube forming a forceps mouth is provided, and a binding member wound around the elastic tube is operated by an operation ring. The forceps opening is opened and closed using a compact means. That is, since the elastic tube is simply tied down, the amount of operating force required to open and close the forceps opening can be reduced. Moreover, it can be sufficiently sealed. Furthermore, since the amount of tightening force can be adjusted, it is possible to set it to leak when the pressure inside the body cavity exceeds a certain level, thereby avoiding an increase in the pressure inside the body cavity. Moreover, since the binding member is made of a flexible plate, it causes less damage to the elastic tube and has high durability.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a front sectional view of the embodiment, FIG. 3 is a side sectional view of the embodiment in a closed state, and FIG. 4 is a side sectional view of the embodiment. FIG. 5 is a side sectional view of the same embodiment when the treatment instrument is in use, FIG. 6 is a front sectional view of the same embodiment when the treatment instrument is in use, and FIG.
The figure is a partial side sectional view of the tied portion, and FIG. 8 is a longitudinal sectional view of the same embodiment. DESCRIPTION OF SYMBOLS 1... Operating part main body, 2... Forceps mouth part, 3... Forceps mouth main body, 6... Hole part, 7... Forceps hole, 9... Elastic tube,
10... Binding member, 12... Operation ring.

Claims (1)

[Claims] 1. An elastic tube that communicates with the forceps hole of the endoscope to form a forceps mouth, an operating ring that rotates around the elastic tube approximately around the axis of the elastic tube, and an operating ring that is wound around the elastic tube. A forceps plug for an endoscope, comprising: a binding member made of a flexible plate having one end connected to the operation ring and the other end fixed at a fixed position.