JPS5850885Y2 - endoscope forceps plug - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a forceps plug for an endoscope that is inserted into a living body cavity for observation, photography, treatment, etc.

Generally, when inserting an endoscope into a living body cavity to observe, photograph, or treat the inside of the body cavity, air is sent through the air and water nozzle installed at the tip of the insertion tube to fill the body cavity appropriately. It is necessary to create a space.

On the other hand, an endoscope is provided with a forceps channel for inserting forceps or the like.

Since this forceps channel communicates with the forceps insertion port provided in the operation section of the endoscope, there is an inconvenience that the air inside the body cavity leaks through this channel. A stopper is provided.

Conventionally, the forceps plug known from Japanese Utility Model Application Publication No. 54-18093 has an elastic tube provided in a part of the forceps channel passage, and the outer surface of the elastic tube is pressed by an elastic body to allow the forceps to be inserted into the elastic tube. The purpose is to seal the passage formed.

However, this method requires an elastic tube and an elastic body, which has the disadvantage of complicating the arrangement structure and increasing the size.Furthermore, there is a risk that the elastic body may not be able to seal reliably, creating a small gap. .

In addition, the forceps plug known from Japanese Utility Model Application Publication No. 173587/1987 has a seal made of a magnet and magnetic fluid at the inlet of the forceps guide tube, but each time the forceps are inserted, the magnetic fluid flows through the forceps. As the magnetic fluid adheres to the forceps, the magnetic fluid gradually decreases, impairing the airtightness of the forceps plug, resulting in poor reliability and durability.

The present invention was developed in view of the above circumstances, and its purpose is to provide a forceps plug for an endoscope that has a simple structure, can ensure the airtightness of the forceps channel, and can improve durability. be.

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

Reference numeral 1 in FIG. 1 is an operating section of an endoscope 2, to which a flexible insertion section 3 and a light guide cable 4 are connected.

Furthermore, the operating section 1 is provided with angle knobs 5, 5, an eyepiece section 6, an air/water supply button 7, a suction side 8, and a forceps stopper 9.

In addition, the distal end surface of the insertion section 3 includes an observation window 10 and an illumination window 11.1.
1 and a forceps port 12 are provided.

Further, a forceps channel 13 is formed in the operating section 1 and the insertion section 3 to communicate the forceps plug 9 and the forceps opening 12.

As shown in FIG. 2, the forceps plug 9 has a substantially cylindrical forceps plug main body 14 fixed to an insertion section main body 15 with screws, and the forceps channel 1 is connected to the inside of the forceps plug main body 14.
A forceps insertion opening 16 communicating with the opening 3 is formed.

Furthermore, an elastic tube 1 is provided in the forceps insertion opening 16 to form an insertion passage 17 that communicates with the forceps channel 13.
8 is provided.

Both ends of this elastic tube 18 have forceps insertion ports 1, respectively.
The elastic tube 18 is adhesively fixed to the inner surface of the elastic tube 18, and the middle portion of the elastic tube 18 forms a closed portion 19 that is tightly attached by the magnetic force of a powder magnet, which will be described later.

That is, the elastic tube 18 is made of an elastic material containing a powdered magnet at least in its middle portion, and is usually tightly attached to the insertion passage 17 by the magnetic force of the powdered magnet.
It is meant to be sealed.

Note that the elastic tube 18 is fitted and attached to an annular recess 20 formed corresponding to the inner surface of the forceps insertion port 16.

Further, the depth of this recess 20 is formed to be greater than the wall thickness of the elastic tube 18, so that when a treatment tool such as forceps 21 is inserted, it can retreat into the recess 20.

When using the endoscope 2 of the above embodiment, the closed portion 19 of the elastic tube 18 in the forceps plug 9 is usually closed as shown in FIGS. 2 and 3, and the forceps insertion port 16 is closed. is sealed.

Therefore, air does not leak out from the living body cavity into which the endoscope 2 is inserted through the forceps channel 13.

Meanwhile, the forceps 21 are inserted into the forceps channel 13 through the forceps plug 9.
When inserting the elastic tube 18, the closed portion 19 is pushed open against the magnetic force of the powder magnet contained in the elastic tube 18, and the elastic tube 18 is inserted.

Furthermore, when the forceps 21 are removed, the magnetic force of the powdered magnet brings the closed portion 19 into close contact with the forceps 21 again, resulting in a closed state.

FIG. 4 shows another embodiment of the present invention, in which a ring portion 22 integrally formed from the end edge of the elastic tube 18 is fitted into the opening of the forceps insertion port 16. The inner diameter d is the outer diameter of the forceps 21 or the insertion passage 1.
The inner diameter is smaller than that of 7.

In this way, the airtightness when the forceps 21 are inserted can be further improved.

Note that the other configurations are the same as in the above embodiment.

In the above embodiment, the powder magnet was contained only in the middle of the elastic tube 18, but the present invention is not limited to this, and the powder magnet may be contained throughout the elastic tube 18.

As explained above, the present invention provides an elastic tube that forms an insertion passage communicating with a forceps channel in the forceps insertion port of an endoscope, and furthermore, this elastic tube is made of an elastic material containing powdered magnet at least in the middle part. It was formed.

Therefore, the magnetic force of the powder magnet causes the closed portion to come into close contact with each other, and the airtightness thereof can be improved.

In addition, airtightness can be ensured even if the elastic material is slightly deformed or deteriorated due to changes over time or temperature changes.

Furthermore, since the elastic material contains powdered magnets, the powdered magnets do not decrease or the magnetic force deteriorates when a treatment tool such as forceps is inserted or removed, and durability can be improved.

Furthermore, since the present invention does not necessarily use an elastic member or the like to crush and close the elastic tube, the structure can be simplified and the forceps plug can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the entire endoscope showing one embodiment of the present invention;
FIG. 2 is a side sectional view of the forceps plug, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a side sectional view of the forceps plug showing another embodiment of the present invention. be. 2... Endoscope, 9... Forceps plug, 12.
...forceps mouth, 13...forceps channel,
14... Forceps plug body, 16... Forceps insertion port, 17... Insertion passage, 18... Elastic tube, 19... Obstruction Part, 21...
·forceps.

Claims (1)

[Scope of utility model registration request] It is equipped with a forceps insertion port that communicates with the forceps channel of the endoscope, and an elastic tube that is provided in the forceps insertion port and forms an insertion passage that communicates with the forceps channel, and this elastic tube has a powder magnet attached at least in the middle. 1. A forceps plug for an endoscope, characterized in that the forceps plug is made of an elastic material containing the above-mentioned powder magnet, and is configured to close at least an intermediate portion thereof using the magnetic force of the powdered magnet.