JP2005052454A - Forceps plug of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forceps plug of an endoscope capable of being attached to an treatment instrument insertion mouthpiece of the endoscope in a stable state and having the excellent operability by smoothly opening a slit formed in a closing film part with the treatment instrument even if the whole forceps plug is formed as an integrally molded article connected with an elastic rubber material. <P>SOLUTION: In the forceps plug of the endoscope, the closing film part 15 in which the slit 15a to be elastically deformed and forced open by the inserted treatment instrument 50 and a treatment instrument insertion mouthpiece attaching part 14 detachably attached to the treatment instrument insertion mouthpiece 4 mounted at the entrance of a treatment instrument insertion channel 3 of the endoscope by the elastic deformation are integrally molded connected with the elastic rubber material. The surface of at least either the closing film part 15 or the treatment instrument insertion mouthpiece attaching part 14 is reformed so that the hardness of the surface of the closing film part 15 is lower than the hardness of the surface of the treatment instrument insertion mouthpiece attaching part 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscopic forceps plug that is detachably attached to an entrance portion of a treatment instrument insertion channel of an endoscope.

  In general, a forceps plug of an endoscope has a closing membrane portion formed with a slit that is elastically deformed and pushed open when the treatment tool is passed through, and an entrance of a treatment tool insertion channel of the endoscope by being elastically deformed. And a treatment instrument insertion base attaching portion that is attached to and detached from the treatment instrument insertion base provided on the instrument.

The closure membrane part of the forceps plug of such an endoscope is formed in a lid-like part that is removable with respect to the body part of the forceps plug in which the treatment instrument insertion base attaching part is formed, In the case where the connecting portion is connected to the body-like portion, and the cleaning performance after use is reduced and the cost is reduced, the entire forceps plug is formed as a single piece integrally formed by a resilient rubber material. (For example, patent document 1).
Japanese Utility Model Publication No. 4-34802, FIG. 1, etc.

  The closure film part of the forceps plug of the endoscope has poor operability such as a heavy operation resistance unless the slit is pushed open smoothly by the passing treatment tool. The treatment tool insertion base attachment part is a treatment tool insertion base. However, if it is not firmly attached to a certain extent, the operability is hindered during the treatment instrument insertion operation. Therefore, a certain degree of flexibility is required for the closure membrane part of the forceps plug, and a certain degree of hardness is required for the treatment instrument insertion base attachment part.

  However, in the endoscopic forceps plug formed as a unitary integrally molded product as described above, the closure membrane portion and the treatment instrument insertion base mounting portion are made to have the same hardness. If the emphasis was placed on insertion, the attachment to the treatment instrument insertion cap wobbled, and if the state of attachment to the treatment instrument insertion cap was stabilized, the insertion of the treatment instrument would become heavy and the operability tends to deteriorate.

  Therefore, the present invention attaches the endoscope forceps plug in a stable state to the endoscope treatment instrument insertion base even if it is an endoscope forceps plug that is formed as a unitary integrally molded product by a resilient rubber material. An object of the present invention is to provide an endoscopic forceps plug that can be used and can smoothly open and open a slit formed in a closing membrane portion with a treatment instrument.

  In order to achieve the above-mentioned object, the forceps plug of the endoscope of the present invention includes an obturator membrane portion formed with a slit that is elastically deformed and pushed open when the treatment instrument is passed through, and an inner portion of the endoscope by elastically deforming. An endoscope in which a treatment instrument insertion base attachment portion attached to and detached from a treatment instrument insertion base provided at the entrance of a treatment instrument insertion channel of the endoscope is integrally formed by a resilient rubber material. In the forceps plug, at least one surface of the closure membrane portion and the treatment instrument insertion base attachment portion is modified so that the surface hardness of the closure membrane portion is lower than the surface hardness of the treatment instrument insertion base attachment portion. .

  According to the present invention, in the endoscopic forceps plug formed entirely as a unitary integrally formed product of elastic rubber material, at least one surface of the closing membrane portion and the treatment instrument insertion base mounting portion is modified. The treatment instrument insertion base attachment part is attached to the endoscope treatment instrument insertion base in a stable state by forming the surface hardness of the closure membrane part lower than the surface hardness of the treatment instrument insertion base attachment part. In addition, the slit formed in the closing membrane portion can be smoothly pushed open with the treatment tool, and good operability can be obtained.

  Surface modification, such as chemical vapor deposition, on the surface of at least one of the closure membrane part and the treatment tool insertion base attachment part of the endoscope forceps plug, which is integrally molded integrally with elastic rubber material The surface hardness of the closing membrane portion is formed to be lower than the surface hardness of the treatment instrument insertion base mounting portion.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the overall configuration of the endoscope. A treatment instrument insertion channel 3 through which the treatment instrument 50 is inserted and removed is inserted and disposed in the flexible insertion portion 1 over the entire length.

  A forceps plug 10 attached to the proximal end inlet of the treatment instrument insertion channel 3 is obliquely disposed near the connection portion of the operation portion 2 connected to the proximal end of the flexible insertion portion 1 with the flexible insertion portion 1. It is arranged to protrude upward.

  FIG. 1 shows a forceps plug 10 as a single unit. A body-like portion 11 and a lid-like portion 12 that can be removed from its upper half are connected together by a belt-like connecting portion 13, and elastic rubber. It is formed by integral molding with the material.

  The lower half of the inner surface portion of the body-like portion 11 is attached to a treatment instrument insertion base attachment portion 14 that is attached to and detached from a treatment instrument insertion base (reference numeral 4 shown in FIG. 3) of an endoscope not shown in FIG. It is formed in the shape where the vicinity part of the lower end mouth was constricted.

  The lid-like portion 12 can be fitted into and removed from the upper half of the barrel-like portion 11 by being elastically deformed, and a treatment instrument is attached to the closing membrane portion 15 formed in the central portion of the lid-like portion 12. A "-"-shaped slit 15a that is elastically deformed and pushed open by being passed therethrough is formed.

  An auxiliary closing membrane portion 16 is formed in an intermediate portion of the inner surface portion of the body-like portion 11, and a small hole 16 a having a diameter slightly smaller than the diameter of the treatment instrument 50 to be inserted is formed in the auxiliary closing membrane portion 16. It is formed to help prevent leakage when using the treatment tool.

  As described above, the forceps plug 10 that is integrally formed integrally with an elastic rubber material is subjected to a surface modification process that increases the surface hardness of the treatment instrument insertion base mounting portion 14 after the rubber molding. (A) is performed, and a surface modification process (B) for reducing the hardness of the surface is performed on the closing membrane portion 15, and as a result, the surface of the treatment instrument insertion base mounting portion 14 is cured, and the closing membrane The surface of the part 15 is softened.

  The surface modification method can be selected as appropriate from various surface modification processes such as chemical vapor deposition, and masking is performed so as not to expose the parts that do not require the surface modification process. Then, a treatment for reacting with the surface modifier may be performed.

  FIG. 3 shows a use state in which the treatment tool 50 is passed through the forceps plug 10, and a treatment tool insertion base 4 that is an inlet of the treatment tool insertion channel 3 is projected from the outer wall portion of the operation unit 2. A treatment tool insertion base attachment portion 14 of the forceps plug 10 is elastically deformed and attached to the tool insertion base 4.

  The treatment instrument 50 is inserted into and removed from the treatment instrument insertion channel 3 from the treatment instrument insertion base 4 by pushing open the slit 15a formed in the closure film part 15 and the small hole 16a formed in the auxiliary closure film part 16. The treatment instrument 50 and the closing membrane portion 15 rub against each other with the insertion / removal operation.

  However, since the closing membrane portion 15 in which the slit 15a is formed is formed flexibly by the surface modification treatment, the closing membrane portion 15 is easily elastically deformed, and the rubbing portion between the treatment instrument 50 and the slit 15a Does not generate large frictional resistance.

  Further, since the treatment instrument insertion base mounting portion 14 is formed rigid by surface modification processing and is engaged with the treatment instrument insertion base 4 firmly, the forceps plug 10 is attached when the treatment instrument 50 is inserted or removed. Stable operation can be performed without shaking.

  The present invention is not limited to the above-described embodiment. For example, the entire forceps stopper 10 is molded from a rubber material having a hardness suitable for the closing membrane portion 15 and only the treatment instrument insertion base mounting portion 14 is surface-modified. The entire forceps plug 10 may be formed of a rubber material having a hardness suitable for the treatment instrument insertion base mounting portion 14 and only the closing film portion 15 may be softened by the surface modification treatment. Good.

1 is a longitudinal sectional view of a single forceps plug of an endoscope according to an embodiment of the present invention. 1 is a side view showing an overall configuration of an endoscope according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the use condition by which a treatment tool is inserted / removed in the forceps plug of the endoscope of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Treatment tool insertion channel 4 Treatment tool insertion base 10 Forceps stopper 11 Trunk-shaped part 12 Lid-like part 13 Connection part 14 Treatment tool insertion base attachment part 15 Closure film part 15a Slit 50 Treatment tool

Claims (1)

With respect to a closure membrane portion formed with a slit that is elastically deformed and pushed open by passing the treatment instrument, and a treatment instrument insertion base provided at the entrance of the treatment instrument insertion channel of the endoscope by elastic deformation In a forceps plug of an endoscope in which a treatment tool insertion base attaching portion to be attached and detached is integrally formed integrally with an elastic rubber material,
It is characterized in that at least one surface of the closure film part and the treatment instrument insertion base attachment part is modified so that the surface hardness of the closure film part is lower than the surface hardness of the treatment instrument insertion base attachment part. Endoscope forceps plug.

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