JP2021126331A - Insertion body of endoscope and endoscope using the same - Google Patents

Insertion body of endoscope and endoscope using the same Download PDF

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JP2021126331A
JP2021126331A JP2020022820A JP2020022820A JP2021126331A JP 2021126331 A JP2021126331 A JP 2021126331A JP 2020022820 A JP2020022820 A JP 2020022820A JP 2020022820 A JP2020022820 A JP 2020022820A JP 2021126331 A JP2021126331 A JP 2021126331A
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coil portion
outer coil
endoscope
axial direction
main body
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JP7398293B2 (en
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貴史 平田
Takashi Hirata
貴史 平田
幹之 大塚
Mikiyuki Otsuka
幹之 大塚
裕樹 保戸田
Hiroki Hotoda
裕樹 保戸田
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NHK Spring Co Ltd
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NHK Spring Co Ltd
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Abstract

To provide an insertion body of an endoscope whose structure can be simplified while stabilizing a bending motion.SOLUTION: An insertion part (insertion body) 3 of an endoscope 1 covers an outer side of a body tube part 9 with a covering part 11 and can be inserted to a subject. The body tube part 9 positions an inner coil part 15 having elasticity that can be bent and restored together with an outer coil part 13 in the outer coil part 13 having elasticity that can be bent and restored with respect to the coil-like axial direction. The outer coil part 13 has a plurality of gaps 13c separating wound parts 13b adjacent to each other in the axial direction. In the inner coil part 15, a wound part 15b is provided correspondingly to the gap 13b of the outer coil part 13 and fit between the wound parts 13b while contacting the adjacent wound parts 13b of the outer coil part 13.SELECTED DRAWING: Figure 2

Description

本発明は、被検体に挿入される内視鏡の挿入体及びこれを用いた内視鏡に関する。 The present invention relates to an insert of an endoscope to be inserted into a subject and an endoscope using the insert.

内視鏡は、被検体としての患者の体内や工業用プラント内の検査等のために広く用いられている。このような内視鏡としては、例えば特許文献１のように、被検体内へ挿入される挿入部（挿入体）が可撓性を有するものがある。 Endoscopes are widely used for examinations in the body of a patient as a subject or in an industrial plant. As such an endoscope, for example, as in Patent Document 1, the insertion portion (insertion body) inserted into the subject has flexibility.

かかる挿入部は、複数の短筒体を相互に揺動自在に係合して構成され、各短筒体の揺動により全体として湾曲動作を行うようになっている。 The insertion portion is configured by engaging a plurality of short cylinders with each other so as to swing freely, and the swinging of each short cylinder causes a bending operation as a whole.

このため、挿入部は、軸方向の圧縮に対する剛性を確保でき、湾曲動作の安定化を図ることができるが、構造が煩雑であるという問題があった。 Therefore, the insertion portion can secure rigidity against compression in the axial direction and can stabilize the bending operation, but has a problem that the structure is complicated.

特開２０１３−１０６９０５号公報Japanese Unexamined Patent Publication No. 2013-106905

解決しようとする問題点は、湾曲動作の安定化を図るために、構造が煩雑になっていた点である。 The problem to be solved is that the structure has become complicated in order to stabilize the bending motion.

本発明は、本体管部の外側を被覆部によって被覆し被検体に挿入自在な内視鏡の挿入体であって、前記本体管部は、前記軸方向に複数の巻部を有するコイル状の線材からなり前記コイル状の軸方向に対して湾曲及び復元が可能な弾性を有する外コイル部と、前記軸方向に複数の巻部を有するコイル状の線材からなり前記外コイル部内に位置して前記外コイル部と共に湾曲及び復元が可能な弾性を有する内コイル部とを備え、前記外コイル部は、前記軸方向で隣接する巻部間を離間させた複数の隙間を有し、前記内コイル部は、前記巻部が前記外コイル部の前記隙間に対応して設けられ前記外コイル部の前記隣接する巻部に接触しつつ当該巻部間に嵌合することを内視鏡の挿入体の最も主な特徴とする。 The present invention is an inserter of an endoscope in which the outside of the main body tube portion is covered with a covering portion and can be inserted into a subject, and the main body tube portion has a coil shape having a plurality of winding portions in the axial direction. It is composed of an outer coil portion made of a wire and having elasticity that can be curved and restored in the axial direction of the coil, and a coiled wire having a plurality of winding portions in the axial direction, and is located inside the outer coil portion. The outer coil portion is provided with an elastic inner coil portion that can be curved and restored, and the outer coil portion has a plurality of gaps that are separated from adjacent winding portions in the axial direction, and the inner coil portion is provided. The insert of the endoscope is such that the winding portion is provided corresponding to the gap of the outer coil portion and is fitted between the winding portions while being in contact with the adjacent winding portion of the outer coil portion. The most main feature of.

また、本発明は、上記挿入体を備えた内視鏡であって、前記挿入体が結合されユーザーが操作する操作部を備えたことを内視鏡の最も主な特徴とする。 Further, the present invention is an endoscope provided with the insert body, and the most main feature of the endoscope is that the insert body is combined and provided with an operation unit operated by the user.

本発明によれば、挿入体が本体管部の内コイル部を外コイル部内に位置させることで構成されているため、構造を簡素化することができる。 According to the present invention, since the insert body is configured by locating the inner coil portion of the main body tube portion inside the outer coil portion, the structure can be simplified.

また、内コイル部の巻部が外コイル部の隣接する巻部に接触しつつそれら隣接する巻部間に嵌合しているので、軸方向の剛性を確保することができる。 Further, since the winding portion of the inner coil portion is in contact with the adjacent winding portion of the outer coil portion and is fitted between the adjacent winding portions, the rigidity in the axial direction can be ensured.

内視鏡を示す一部を省略した概略正面図である（実施例１）。It is a schematic front view which omitted a part which shows an endoscope (Example 1). 図１の内視鏡の挿入部であり、部分的に内部構造及び断面を示す正面図である（実施例１）。It is an insertion part of the endoscope of FIG. 1, and is a front view partially showing an internal structure and a cross section (Example 1). 図２のＩＩＩ−ＩＩＩ線に係る断面図である（実施例１）。It is sectional drawing which concerns on line III-III of FIG. 2 (Example 1). 図２の挿入体の本体管部を示す断面図である（実施例１）。It is sectional drawing which shows the main body tube part of the insertion body of FIG. 2 (Example 1). 図４の要部を拡大した断面図である（実施例１）。It is sectional drawing which enlarged the main part of FIG. 4 (Example 1). 図４の挿入体の本体管部の湾曲時の状態を示す断面図である（実施例１）。It is sectional drawing which shows the state at the time of bending of the main body tube part of the insertion body of FIG. 4 (Example 1). 内視鏡の挿入部であり、部分的に内部構造及び断面を示す正面図である（実施例２）。It is an insertion part of an endoscope, and is a front view partially showing an internal structure and a cross section (Example 2). 図７のＶＩＩＩ−ＶＩＩＩ線に係る断面図である（実施例２）。It is sectional drawing which concerns on line VIII-VIII of FIG. 7 (Example 2). 内視鏡の挿入部の本体管部の要部を示す断面図である（実施例３）。It is sectional drawing which shows the main part of the main body tube part of the insertion part of an endoscope (Example 3).

湾曲動作の安定化を図りつつ構造を簡素化するという目的を、内視鏡の挿入体の本体管部を外コイル部内に内コイル部を位置させた二重コイル形状とすることにより実現した。 The purpose of simplifying the structure while stabilizing the bending motion was realized by forming the main body tube portion of the insertion body of the endoscope into a double coil shape in which the inner coil portion is located inside the outer coil portion.

すなわち、内視鏡（１）の挿入体（３）は、本体管部（９）の外側を被覆部（１１）によって被覆し被検体に挿入自在なものである。本体管部９は、外コイル部（１３）と内コイル部（１５）とを備える。外コイル部（１３）は、軸方向に複数の巻部（１３ｂ）を有するコイル状の線材（１３ａ）からなりコイル状の軸方向に対して湾曲及び復元が可能な弾性を有する。内コイル部（１５）は、軸方向に複数の巻部（１５ｂ）を有するコイル状の線材（１５ａ）からなり外コイル部（１３）内に位置して外コイル部（１３）と共に湾曲及び復元が可能な弾性を有する。また、外コイル部（１３）は、軸方向で隣接する巻部（１３ｂ）間を離間させた複数の隙間（１３ｃ）を有し、内コイル部１５は、巻部（１５ｂ）が外コイル部１３の隙間（１３ｃ）に対応して設けられ外コイル部１３の隣接する巻部（１３ｂ）に接触しつつ当該巻部（１３ｂ）間に嵌合する。 That is, the insert body (3) of the endoscope (1) is such that the outside of the main body tube portion (9) is covered with the covering portion (11) and can be inserted into the subject. The main body tube portion 9 includes an outer coil portion (13) and an inner coil portion (15). The outer coil portion (13) is made of a coil-shaped wire rod (13a) having a plurality of winding portions (13b) in the axial direction, and has elasticity capable of bending and restoring in the coil-shaped axial direction. The inner coil portion (15) is composed of a coiled wire rod (15a) having a plurality of winding portions (15b) in the axial direction, is located inside the outer coil portion (13), and is curved and restored together with the outer coil portion (13). Has the elasticity that is possible. Further, the outer coil portion (13) has a plurality of gaps (13c) separated between adjacent winding portions (13b) in the axial direction, and the winding portion (15b) of the inner coil portion 15 is the outer coil portion. It is provided corresponding to the gap (13c) of the 13 and fits between the winding portions (13b) while contacting the adjacent winding portion (13b) of the outer coil portion 13.

内外コイル部（１３，１５）の線材（１３ａ，１５ａ）の断面形状は、円形、矩形、楕円形、三角形等の適宜の形状を採用することが可能である。ただし、外コイル部（１３）は、円形や半円形のように、少なくともコイル状の径方向の内側の断面形状が円弧状であるのが好ましい。 As the cross-sectional shape of the wire rods (13a, 15a) of the inner and outer coil portions (13, 15), an appropriate shape such as a circle, a rectangle, an ellipse, or a triangle can be adopted. However, it is preferable that the outer coil portion (13) has at least a coil-shaped radial inner cross-sectional shape such as a circular shape or a semi-circular shape.

また、内コイル部（１５）は、外コイル部（１３）と同一断面形状だけでなく、異なる断面形状とすることも可能である。ただし、内コイル部（１５）は、断面形状が円形であるのが好ましい。 Further, the inner coil portion (15) can have not only the same cross-sectional shape as the outer coil portion (13) but also a different cross-sectional shape. However, the inner coil portion (15) preferably has a circular cross-sectional shape.

被覆部（１１）は、本体管部（９）よりも捩じれ剛性が高い管体であるのが好ましい。この場合、被覆部（１１）は、編組チューブとしてもよい。 The covering portion (11) is preferably a tubular body having a higher torsional rigidity than the main body tubular portion (9). In this case, the covering portion (11) may be a braided tube.

また、被覆部（１１）は、外側にコーティング（１７）を備えてもよい。 Further, the covering portion (11) may be provided with a coating (17) on the outside.

かかる挿入体（３）を備えた内視鏡１は、挿入体（３）が結合され、ユーザーが操作する操作部（５）を備える。 The endoscope 1 provided with the insert body (3) includes an operation unit (5) to which the insert body (3) is connected and operated by the user.

［内視鏡］
図１は、内視鏡を示す一部を省略した概略正面図である。 [Endoscope]
FIG. 1 is a schematic front view in which a part showing the endoscope is omitted.

内視鏡１は、挿入部３と、操作部５とを備え、被検体としての患者の体内や工業用プラント内の検査や処置等を行うものである。 The endoscope 1 includes an insertion unit 3 and an operation unit 5, and performs inspections and treatments in the patient's body as a subject or in an industrial plant.

挿入部３は、被検体に挿入される本実施例の挿入体であり、可撓性を有する筒状体からなっている。なお、挿入部３の詳細については後述する。 The insertion portion 3 is an insert body of the present embodiment to be inserted into the subject, and is made of a flexible tubular body. The details of the insertion portion 3 will be described later.

挿入部３の軸方向の先端部３ａには、照明や観察のための光学系のレンズ（図示せず）、吸引や器具挿通用のチャンネルの先端開口部（図示せず）、送水・送気用のノズル（図示せず）等が設けられている。挿入部３の軸方向の基端部３ｂは、操作部５に結合されている。 The axial tip 3a of the insertion portion 3 has an optical lens (not shown) for illumination and observation, a tip opening (not shown) for a channel for suction and instrument insertion, and water supply / air supply. Nozzles (not shown) and the like are provided. The axial base end portion 3b of the insertion portion 3 is coupled to the operation portion 5.

なお、軸方向とは、挿入部３の軸心Ｏに沿った方向である。また、軸方向は、挿入部３の軸心Ｏに厳密に沿っている必要はなく、挿入部３の軸心Ｏに対して若干傾斜しているものも含まれる。 The axial direction is a direction along the axial center O of the insertion portion 3. Further, the axial direction does not have to be exactly along the axis O of the insertion portion 3, and includes those slightly inclined with respect to the axis O of the insertion portion 3.

操作部５は、操作者であるユーザーが把持して内視鏡１を操作する部分である。操作部５からは、ケーブル７が伸び、ケーブル７の先端（図示せず）は、光源（図示せず）、コンピューター（図示せず）等に接続されるコネクタ（図示せず）を有している。 The operation unit 5 is a portion that is grasped by a user who is an operator to operate the endoscope 1. A cable 7 extends from the operation unit 5, and the tip (not shown) of the cable 7 has a connector (not shown) connected to a light source (not shown), a computer (not shown), or the like. There is.

操作部５には、挿入部３を操作するためのノブ５ａの他、吸引ボタン５ｂ、送気・送水ボタン５ｃ、チャンネルの基端開口部５ｄ、その他各種スイッチ（図示せず）等が設けられている。ノブ５ａは、挿入部３内を通る操作用ワイヤー（図示せず）に接続されており、回転によりワイヤーを牽引して挿入部３を湾曲させることを可能とする。 The operation unit 5 is provided with a knob 5a for operating the insertion unit 3, a suction button 5b, an air supply / water supply button 5c, a channel base end opening 5d, and various other switches (not shown). ing. The knob 5a is connected to an operating wire (not shown) that passes through the insertion portion 3, and can pull the wire by rotation to bend the insertion portion 3.

かかる構成の内視鏡１は、使用時に挿入部３を被検体内に挿入させる。この挿入部３の挿入時には、必要に応じて、操作部５のノブ５ａにより挿入部３を湾曲させ、操作部５と共に挿入部３を軸周りに回転させる等して、挿入部３の先端部３ａを所望の方向に指向させることができる。 The endoscope 1 having such a configuration causes the insertion portion 3 to be inserted into the subject at the time of use. At the time of inserting the insertion portion 3, the insertion portion 3 is curved by the knob 5a of the operation portion 5 and the insertion portion 3 is rotated around the axis together with the operation portion 5, so that the tip portion of the insertion portion 3 is inserted. 3a can be oriented in a desired direction.

［挿入部］
図２は、図１の内視鏡１の挿入部３であり、部分的に内部構造及び断面を示す正面図である。図３は、図２のＩＩＩ−ＩＩＩ線に係る断面図である。図４は、図２の挿入部３の本体管部９を示す断面図である。図５は、図４の要部を拡大した断面図である。 [Insert]
FIG. 2 is an insertion portion 3 of the endoscope 1 of FIG. 1, and is a front view partially showing an internal structure and a cross section. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is a cross-sectional view showing a main body tube portion 9 of the insertion portion 3 of FIG. FIG. 5 is an enlarged cross-sectional view of a main part of FIG.

挿入部３は、本体管部９の外側を被覆部１１によって被覆した被検体に挿入自在な構成となっている。 The insertion portion 3 has a configuration that allows it to be inserted into a subject whose outer side of the main body tube portion 9 is covered with the coating portion 11.

本体管部９は、二重コイル形状であり、外コイル部１３と、内コイル部１５とを備えている。 The main body tube portion 9 has a double coil shape, and includes an outer coil portion 13 and an inner coil portion 15.

外コイル部１３は、コイルばねであり、軸方向に複数の巻部１３ｂを有するコイル状の線材１３ａからなる。なお、巻部１３ｂは、コイル形状を構成する一巻きを意味する。本実施例の外コイル部１３は、コイルばねであることにより、コイル状の軸方向に対して湾曲及び復元が可能な弾性を有している。 The outer coil portion 13 is a coil spring, and is made of a coil-shaped wire rod 13a having a plurality of winding portions 13b in the axial direction. The winding portion 13b means one winding forming the coil shape. Since the outer coil portion 13 of this embodiment is a coil spring, it has elasticity that allows it to be curved and restored in the axial direction of the coil shape.

線材１３ａの材質は、金属や樹脂等とすることが可能である。本実施例において、線材１３ａの断面形状は、円形となっている。 The material of the wire rod 13a can be metal, resin, or the like. In this embodiment, the cross-sectional shape of the wire rod 13a is circular.

外コイル部１３の径Ｄ１は、軸方向の一端から他端に至るまで一定となっている。ただし、外コイル部１３の径Ｄ１は、軸方向で変化させることも可能である。 The diameter D1 of the outer coil portion 13 is constant from one end to the other end in the axial direction. However, the diameter D1 of the outer coil portion 13 can be changed in the axial direction.

外コイル部１３は、軸方向で隣接する巻部１３ｂ間を軸方向で離間させた複数の隙間（ピッチ）１３ｃを有している。本実施例の隙間１３ｃは、軸方向で隣接する巻部１３ｂの各間に形成され、全ての隙間１３ｃは、同一の軸方向の寸法を有している。ただし、隙間１３ｃは、軸方向で一部の巻部１３ｂ間にのみ設けることも可能である。また、隙間１３ｃの軸方向の寸法を変化させることも可能である。 The outer coil portion 13 has a plurality of gaps (pitch) 13c in which the winding portions 13b adjacent in the axial direction are separated in the axial direction. The gaps 13c of this embodiment are formed between the winding portions 13b adjacent in the axial direction, and all the gaps 13c have the same axial dimensions. However, the gap 13c can be provided only between a part of the winding portions 13b in the axial direction. It is also possible to change the axial dimension of the gap 13c.

内コイル部１５は、外コイル部１３と同様に、軸方向に複数の巻部１５ｂを有するコイル状の線材１５ａからなるコイルばねである。従って、内コイル部１５は、外コイル部１３と共にコイル状の軸方向に対して湾曲及び復元が可能な弾性を有している。 Like the outer coil portion 13, the inner coil portion 15 is a coil spring made of a coiled wire rod 15a having a plurality of winding portions 15b in the axial direction. Therefore, the inner coil portion 15 and the outer coil portion 13 have elasticity that allows the coil to be curved and restored in the axial direction.

内コイル部１５は、線材１５ａの材質を金属や樹脂とすることが可能であり、線材１５ａの断面形状が円形である。 The inner coil portion 15 can be made of metal or resin as the material of the wire rod 15a, and the cross-sectional shape of the wire rod 15a is circular.

この内コイル部１５は、外コイル部１３の内側に同心状に位置し、外コイル部１３内に螺合されている。この螺合により、内コイル部１５の巻部１５ｂが外コイル部１３の隣接する巻部１３ｂの各間に位置している。従って、内コイル部１５は、巻部１５ｂが外コイル部１３の隙間１３ｃに対応して設けられた構成となっている。 The inner coil portion 15 is concentrically located inside the outer coil portion 13 and is screwed into the outer coil portion 13. Due to this screwing, the winding portion 15b of the inner coil portion 15 is located between each of the adjacent winding portions 13b of the outer coil portion 13. Therefore, the inner coil portion 15 has a configuration in which the winding portion 15b is provided corresponding to the gap 13c of the outer coil portion 13.

また、内コイル部１５の巻部１５ｂは、径Ｄ２及び線材１５ａの線径ｄ２の設定により、外コイル部１３の隣接する巻部１３ｂに接触しつつ当該巻部１３ｂ間に嵌合している。 Further, the winding portion 15b of the inner coil portion 15 is fitted between the winding portions 13b while being in contact with the adjacent winding portion 13b of the outer coil portion 13 by setting the diameter D2 and the wire diameter d2 of the wire rod 15a. ..

なお、内コイル部１５の径Ｄ２は、軸方向の一端から他端に至るまで一定となっている。ただし、内コイル部１５の径Ｄ２は、外コイル部１３の径Ｄ１に応じて、軸方向で変化させること等も可能である。 The diameter D2 of the inner coil portion 15 is constant from one end to the other end in the axial direction. However, the diameter D2 of the inner coil portion 15 can be changed in the axial direction according to the diameter D1 of the outer coil portion 13.

また、線材１５ａの線径ｄ２は、外コイル部１３の線材１３ａの線径ｄ１と同一になっている。ただし、線材１５ａの線径ｄ２は、外コイル部１３の線材１３ａの線径ｄ１よりも大きく又は小さく形成してもよい。 Further, the wire diameter d2 of the wire rod 15a is the same as the wire diameter d1 of the wire rod 13a of the outer coil portion 13. However, the wire diameter d2 of the wire rod 15a may be formed larger or smaller than the wire diameter d1 of the wire rod 13a of the outer coil portion 13.

内コイル部１５は、隣接する巻部１５ｂ間を軸方向で離間させた複数の隙間（ピッチ）１５ｃを有している。隙間１５ｃは、外コイル部１３との螺合に応じ、隣接する巻部１５ｂの各間に形成され、全ての隙間１５ｃは、同一の軸方向の寸法を有している。ただし、隙間１５ｃは、外コイル部１３の場合と同様、軸方向で一部の巻部１５ｂ間にのみ設けたり、軸方向の寸法を異ならせることも可能である。 The inner coil portion 15 has a plurality of gaps (pitch) 15c in which adjacent winding portions 15b are separated in the axial direction. The gaps 15c are formed between the adjacent winding portions 15b according to the screwing with the outer coil portion 13, and all the gaps 15c have the same axial dimensions. However, as in the case of the outer coil portion 13, the gap 15c can be provided only between a part of the winding portions 15b in the axial direction, or the dimensions in the axial direction can be different.

なお、外コイル部１３及び内コイル部１５は、外コイル部１３内に内コイル部１５が位置していない自由状態で、隣接する巻部１３ｂ，１５ｂの各間に隙間１３ｃ，１５ｃを有する構成の他、自由状態で隣接する巻部１３ｂ，１５ｂが密着した構成（密着ばね）とすることも可能である。さらに、外コイル部１３及び内コイル部１５の一方のみを密着ばねとすることも可能である。 The outer coil portion 13 and the inner coil portion 15 are configured to have gaps 13c and 15c between the adjacent winding portions 13b and 15b in a free state in which the inner coil portion 15 is not located in the outer coil portion 13. In addition, it is also possible to have a configuration (contact spring) in which adjacent winding portions 13b and 15b are in close contact with each other in a free state. Further, it is also possible to use only one of the outer coil portion 13 and the inner coil portion 15 as a close contact spring.

外コイル部１３及び内コイル部１５の一方又は双方が自由状態で密着ばねである場合は、内コイル部１５と外コイル部１３とを螺合することにより相互に密着する巻部１３ｂ相互間及び巻部１５ｂ相互間の一方又は双方を離間させ、外コイル部１３の隙間１３ｃ及び内コイル部１５の隙間１５ｃの一方又は双方が形成される。この場合、二重コイル形状の本体管部９に初張力を付与することが可能である。 When one or both of the outer coil portion 13 and the inner coil portion 15 are in close contact with each other in a free state, the winding portions 13b are in close contact with each other by screwing the inner coil portion 15 and the outer coil portion 13 and between the winding portions 13b. One or both of the winding portions 15b are separated from each other, and one or both of the gap 13c of the outer coil portion 13 and the gap 15c of the inner coil portion 15 are formed. In this case, it is possible to apply the initial tension to the main body tube portion 9 having a double coil shape.

かかる構成の本体管部９の外周には、被覆部１１が設けられている。 A covering portion 11 is provided on the outer periphery of the main body pipe portion 9 having such a configuration.

被覆部１１は、本体管部９よりも捩じれ剛性が高い管体である。これにより、被覆部１１は、本体管部９の捩じれを抑制する。本実施例の被覆部１１は、編組チューブであり、金属製の繊維を交差して格子状に編み込んで形成されている。 The covering portion 11 is a tubular body having a higher torsional rigidity than the main body tubular portion 9. As a result, the covering portion 11 suppresses the twisting of the main body tube portion 9. The covering portion 11 of this embodiment is a braided tube, and is formed by crossing metal fibers and knitting them in a lattice pattern.

なお、被覆部１１は、図２において本体管部９を説明のために部分的に覆った状態となっているが、本体管部９の全域を覆っている。 Although the covering portion 11 partially covers the main body tube portion 9 for explanation in FIG. 2, it covers the entire area of the main body tube portion 9.

被覆部１１と本体管部９とは、図示しない端部間が固着されている。この固着は、溶着、はんだ付け、接着等の適宜の手段によって行えばよい。 The covering portion 11 and the main body tube portion 9 are fixed between ends (not shown). This fixing may be performed by an appropriate means such as welding, soldering, and adhesion.

［挿入部の動作］
図６は、図４の挿入部３の本体管部９の湾曲時の状態を示す断面図である。 [Operation of insertion part]
FIG. 6 is a cross-sectional view showing a curved state of the main body tube portion 9 of the insertion portion 3 of FIG.

本実施例の内視鏡１では、上記のように挿入部３を被検体内に挿入させる際、図１のように、軸心Ｏが湾曲していない直状状態から、必要に応じて操作部５のノブ５ａにより挿入部３を湾曲させる。併せて、操作部５と共に挿入部３を軸周りに回転させることもある。 In the endoscope 1 of the present embodiment, when the insertion portion 3 is inserted into the subject as described above, the insertion portion 3 is operated as necessary from a straight state in which the axis O is not curved as shown in FIG. The insertion portion 3 is curved by the knob 5a of the portion 5. At the same time, the insertion unit 3 may be rotated around the axis together with the operation unit 5.

挿入部３が直状状態である場合は、図４及び図５のように、本体管部９の内コイル部１５の巻部１５ｂが外コイル部１３の隣接する巻部１３ｂに接触しつつ、それら隣接する巻部１３ｂ間に嵌合している。 When the insertion portion 3 is in a straight state, as shown in FIGS. 4 and 5, the winding portion 15b of the inner coil portion 15 of the main body tube portion 9 is in contact with the adjacent winding portion 13b of the outer coil portion 13 while being in contact with the winding portion 13b. It is fitted between the adjacent winding portions 13b.

このため、挿入部３は、軸方向での圧縮力が作用しても、外コイル部１３の隙間１３ｃ及び内コイル部１５の隙間１５ｃが圧縮により小さくなることを内コイル部１５の巻部１５ｂ及び外コイル部１３の巻部１３ｂがそれぞれ規制し、全体としての圧縮が抑制される。 Therefore, in the insertion portion 3, even if a compressive force in the axial direction acts, the gap 13c of the outer coil portion 13 and the gap 15c of the inner coil portion 15 become smaller due to compression, so that the winding portion 15b of the inner coil portion 15 becomes smaller. And the winding portion 13b of the outer coil portion 13 regulate each, and the compression as a whole is suppressed.

一方、挿入部３の軸心Ｏが湾曲するときには、図６のように、湾曲の内側で本体管部９の外コイル部１３の隙間１３ｃが小さくなり、湾曲の外側で外コイル部１３の隙間１３ｃが大きくなる。 On the other hand, when the axial center O of the insertion portion 3 is curved, as shown in FIG. 6, the gap 13c of the outer coil portion 13 of the main body tube portion 9 becomes smaller inside the curvature, and the gap 13c of the outer coil portion 13 outside the curvature. 13c becomes large.

このとき、本体管部９内では、内コイル部１５が径方向に変位することにより湾曲を円滑に行うことができる。 At this time, in the main body tube portion 9, the inner coil portion 15 is displaced in the radial direction, so that the bending can be smoothly performed.

すなわち、内コイル部１５は、湾曲の内側で、外コイル部１３の隙間１３ｃが小さくなることにより、各巻部１５ｂが径方向に押し出される。この押し出しは、外コイル部１３のコイル状の径方向の内側の断面形状が円弧状であることにより、内外コイル部１３，１５の巻部１３ｂ及び１５ｂ間の接触角αが大きく、容易に行うことができる。 That is, in the inner coil portion 15, each winding portion 15b is extruded in the radial direction by reducing the gap 13c of the outer coil portion 13 inside the curve. This extrusion is easily performed because the coil-shaped radial inner cross-sectional shape of the outer coil portion 13 is arcuate, so that the contact angle α between the winding portions 13b and 15b of the inner and outer coil portions 13 and 15 is large. be able to.

なお、接触角αは、外コイル部１３の巻部１３ｂと軸方向の両側で接触する内コイル部１５の巻部１５ｂとの接触部分の接線間の角度をいう。 The contact angle α refers to the angle between the tangents of the contact portion between the winding portion 13b of the outer coil portion 13 and the winding portion 15b of the inner coil portion 15 which is in contact with both sides in the axial direction.

かかる内コイル部１５の巻部１５ｂの湾曲内側での押し出しに応じ、内コイル部１５は、全体として径方向の外側に変位するが、この変位は、内コイル部１５の各巻部１５ｂが外コイル部１３の大きくなった隙間１３ｃに入り込むようにして許容される。 The inner coil portion 15 is displaced outward in the radial direction as a whole in response to the extrusion of the winding portion 15b of the inner coil portion 15 inside the curvature. It is allowed to enter the enlarged gap 13c of the portion 13.

こうして、挿入部３は、円滑に湾曲して、可撓性が阻害されることはない。また、かかる湾曲状態でも、直状状態と同様に、軸方向での圧縮力が作用しても全体としての圧縮が抑制される。 In this way, the insertion portion 3 is smoothly curved and the flexibility is not impaired. Further, even in such a curved state, the compression as a whole is suppressed even if a compressive force in the axial direction acts as in the straight state.

このように、挿入部３は、軸方向の圧縮を規制することができる構成でありながら、可撓性が阻害されることはない。結果として、挿入部３は、被検体への挿入や湾曲動作の安定化が図られる。 As described above, the insertion portion 3 has a structure capable of restricting compression in the axial direction, but the flexibility is not hindered. As a result, the insertion portion 3 can be inserted into the subject and the bending motion can be stabilized.

また、内コイル部１５が変位するときは、少なくとも外コイル部１３のコイル状の径方向の内側の断面形状が円弧状であることにより、外コイル部１３の巻部１３ｂを軸方向で大型にすることなく、内コイル部１５が外コイル部１３から脱落することを抑制できる。 Further, when the inner coil portion 15 is displaced, at least the coil-shaped radial inner cross-sectional shape of the outer coil portion 13 is arcuate, so that the winding portion 13b of the outer coil portion 13 becomes large in the axial direction. It is possible to prevent the inner coil portion 15 from falling off from the outer coil portion 13 without doing so.

また、挿入部３が湾曲する際は、上記のように、湾曲の内側で本体管部９の外コイル部１３の隙間１３ｃが小さくなり、湾曲の外側で外コイル部１３の隙間が大きくなるので、軸心Ｏ上で隙間１３ｃの大きさが直状時と比較して変化しないことになる。 Further, when the insertion portion 3 is curved, as described above, the gap 13c of the outer coil portion 13 of the main body tube portion 9 becomes smaller inside the curvature, and the gap of the outer coil portion 13 becomes larger outside the curvature. , The size of the gap 13c on the axis O does not change as compared with the case of the straight shape.

従って、挿入部３は、直状時だけでなく湾曲時にも、軸心Ｏ上の長さを一定に保つことができ、内部を挿通する部材への干渉が抑制される。 Therefore, the insertion portion 3 can keep the length on the axis O constant not only in the straight shape but also in the curved shape, and the interference with the member passing through the inside is suppressed.

また、本実施例では、挿入部３の湾曲状態から直状状態に戻す場合、本体管部９の外コイル部１３及び内コイル部１５の復元力によって円滑に動作させることができる。 Further, in the present embodiment, when the insertion portion 3 is returned from the curved state to the straight state, it can be smoothly operated by the restoring force of the outer coil portion 13 and the inner coil portion 15 of the main body tube portion 9.

さらに、本体管部９の外コイル部１３及び内コイル部１５の径方向の復元力により、挿入部３は、径方向に作用する外力による潰れや変形が抑制され、内部を挿通する部材を保護することができる。また、挿入部３は、潰れや変形の抑制により、チャンネルに器具を挿通するときに器具を円滑に滑らせることができる。 Further, due to the radial restoring force of the outer coil portion 13 and the inner coil portion 15 of the main body tube portion 9, the insertion portion 3 is suppressed from being crushed or deformed by the external force acting in the radial direction, and protects the member to be inserted inside. can do. Further, the insertion portion 3 can smoothly slide the instrument when inserting the instrument into the channel by suppressing crushing and deformation.

操作部５と共に挿入部３を軸周りに回転させる際には、本体管部９の外側を覆う被覆部１１の捩じれ剛性により、挿入部３の捩じれを抑制して、挿入部３の先端部３ａに至るまで軸周りに確実に回転させることができる。 When the insertion portion 3 is rotated around the axis together with the operation portion 5, the twisting rigidity of the covering portion 11 covering the outside of the main body tube portion 9 suppresses the twisting of the insertion portion 3 and the tip portion 3a of the insertion portion 3 It can be reliably rotated around the axis up to.

［実施例１の効果］
以上説明したように、本実施例の内視鏡１の挿入部３は、かかる径方向での本体管部９の外側を被覆部１１によって被覆し、被検体に挿入自在に構成されている。本体管部９は、軸方向に複数の巻部１３ｂを有するコイル状の線材１３ａからなり、コイル状の軸方向に対して湾曲及び復元が可能な弾性を有する外コイル部１３と、軸方向に複数の巻部１５ｂを有するコイル状の線材１５ａからなり、外コイル部１３内に位置して外コイル部１３と共に湾曲及び復元が可能な弾性を有する内コイル部１５とを備える。 [Effect of Example 1]
As described above, the insertion portion 3 of the endoscope 1 of the present embodiment is configured such that the outside of the main body tube portion 9 in the radial direction is covered with the covering portion 11 so as to be freely inserted into the subject. The main body tube portion 9 is composed of a coiled wire rod 13a having a plurality of winding portions 13b in the axial direction, and has an outer coil portion 13 having elasticity capable of bending and restoring in the coiled axial direction, and an axially axially. It is composed of a coiled wire rod 15a having a plurality of winding portions 15b, and includes an inner coil portion 15 located inside the outer coil portion 13 and having elasticity capable of bending and restoring together with the outer coil portion 13.

外コイル部１３は、軸方向で隣接する巻部１３ｂ間を離間させた複数の隙間１３ｃを有し、内コイル部１５は、巻部１５ｂが外コイル部１３の隙間１５ｂに対応して設けられ、外コイル部１３の隣接する巻部１３ｂに接触しつつ当該巻部１３ｂ間に嵌合する。 The outer coil portion 13 has a plurality of gaps 13c that are spaced apart from each other in the axial direction, and the inner coil portion 15 is provided with the winding portion 15b corresponding to the gap 15b of the outer coil portion 13. , Fits between the winding portions 13b while contacting the adjacent winding portions 13b of the outer coil portion 13.

従って、挿入部３は、本体管部９が内コイル部１５を外コイル部１３内に位置させることで構成されているため、構造を簡素化することができる。 Therefore, since the main body tube portion 9 is configured by positioning the inner coil portion 15 inside the outer coil portion 13, the structure of the insertion portion 3 can be simplified.

また、挿入部３は、軸方向での圧縮力が作用しても、外コイル部１３の隙間１３ｃ及び内コイル部１５の隙間１５ｃの圧縮が規制され、全体として圧縮が抑制される。 Further, even if a compressive force in the axial direction acts on the insertion portion 3, the compression of the gap 13c of the outer coil portion 13 and the gap 15c of the inner coil portion 15 is restricted, and the compression is suppressed as a whole.

結果として、挿入部３は、軸方向の剛性を確保することができ、内視鏡１の先端を観察対象に正確に位置決めすることができる。 As a result, the insertion portion 3 can secure the rigidity in the axial direction, and the tip of the endoscope 1 can be accurately positioned on the observation target.

また、湾曲時には、湾曲の内側で外コイル部１３の隙間１３ｃを小さくしつつ湾曲の外側に内コイル部１５を変位させ、湾曲の外側で外コイル部１３の隙間１３ｃを大きくして内コイル部１５の変位を許容することで、軸方向の剛性を確保しても十分な可撓性を確保することができる。 Further, at the time of bending, the inner coil portion 15 is displaced to the outside of the curvature while reducing the gap 13c of the outer coil portion 13 inside the curvature, and the gap 13c of the outer coil portion 13 is increased to the outside of the curvature to increase the inner coil portion. By allowing the displacement of 15, sufficient flexibility can be ensured even if the rigidity in the axial direction is secured.

さらに、本実施例では、挿入部３の湾曲状態と直状状態との間で、本体管部９の外コイル部１３及び内コイル部１５の繰り返し円滑に動作させることができる。 Further, in this embodiment, the outer coil portion 13 and the inner coil portion 15 of the main body tube portion 9 can be repeatedly and smoothly operated between the curved state and the straight state of the insertion portion 3.

しかも、本実施例の挿入部３は、本体管部９の外コイル部１３及び内コイル部１５の径方向の復元力により、径方向に作用する外力による潰れや変形が抑制され、内部を挿通する部材を保護することができると共に、器具を挿通する際に円滑に滑らせることができる。 Moreover, the insertion portion 3 of the present embodiment is inserted through the inside by suppressing crushing and deformation due to the external force acting in the radial direction due to the radial restoring force of the outer coil portion 13 and the inner coil portion 15 of the main body tube portion 9. It is possible to protect the member to be used and to slide the device smoothly when inserting the device.

本実施例の外コイル部１３は、少なくともコイル状の径方向の内側の断面形状が円弧状であるので、内外コイル部１３，１５の巻部１３ｂ及び１５ｂ間の接触角αを大きくして、湾曲時における内コイル部１５の変位を容易に行うことができる。 Since the outer coil portion 13 of this embodiment has at least a coil-shaped radial inner cross-sectional shape of an arc shape, the contact angle α between the winding portions 13b and 15b of the inner and outer coil portions 13 and 15 is increased. The displacement of the inner coil portion 15 at the time of bending can be easily performed.

しかも、内コイル部１５が変位するときは、少なくとも外コイル部１３のコイル状の径方向の内側の断面形状が円弧状であることにより、外コイル部１３の巻部１３ｂを軸方向で大型にすることなく、内コイル部１５が外コイル部１３から脱落することを抑制できる。 Moreover, when the inner coil portion 15 is displaced, at least the coil-shaped radial inner cross-sectional shape of the outer coil portion 13 is arcuate, so that the winding portion 13b of the outer coil portion 13 becomes large in the axial direction. It is possible to prevent the inner coil portion 15 from falling off from the outer coil portion 13 without doing so.

本実施例では、内コイル部１５の断面形状が円形であるため、確実に内外コイル部１３，１５の巻部１３ｂ及び１５ｂ間の接触角αを大きくできる。 In this embodiment, since the cross-sectional shape of the inner coil portion 15 is circular, the contact angle α between the winding portions 13b and 15b of the inner and outer coil portions 13 and 15 can be surely increased.

また、本実施例では、被覆部１１が本体管部９よりも捩じれ剛性が高い管体である。このため、挿入部３を軸周りに回転させる際には、挿入部３の捩じれを抑制して、挿入部３の基端部３ｂから先端部３ａに至るまで回転させることができる。 Further, in this embodiment, the covering portion 11 is a tubular body having a higher torsional rigidity than the main body tubular portion 9. Therefore, when the insertion portion 3 is rotated about the axis, the twisting of the insertion portion 3 can be suppressed and the insertion portion 3 can be rotated from the base end portion 3b to the tip end portion 3a.

本実施例の被覆部１１は、編組チューブであるため、より確実に本体管部９の捩じれを抑制することができる。 Since the covering portion 11 of this embodiment is a braided tube, it is possible to more reliably suppress the twisting of the main body tube portion 9.

図７は、実施例２に係る内視鏡の挿入部であり、部分的に内部構造及び断面を示す正面図である。図８は、図７のＶＩＩＩ−ＶＩＩＩ線に係る断面図である。なお、実施例２では、実施例１と対応する構成に同符号を付して重複した説明を省略する。 FIG. 7 is an insertion portion of the endoscope according to the second embodiment, and is a front view partially showing an internal structure and a cross section. FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. In the second embodiment, the same reference numerals are given to the configurations corresponding to the first embodiment, and duplicate description will be omitted.

実施例２の挿入部３は、被覆部１１の外側にコーティング１７を備えている。その他は、実施例１と同一である。 The insertion portion 3 of the second embodiment includes a coating 17 on the outside of the covering portion 11. Others are the same as in Example 1.

コーティング１７は、被覆部１１の外周全域を覆っている。なお、図７では、理解容易のために、図２と同様に被覆部１１が本体管部９を部分的に覆った状態となっていると共に、コーティング１７が被覆部１１を部分的に覆った状態となっている。 The coating 17 covers the entire outer circumference of the covering portion 11. In FIG. 7, for easy understanding, the covering portion 11 partially covers the main body tube portion 9 and the coating 17 partially covers the covering portion 11 as in FIG. 2. It is in a state.

本実施例のコーティング１７は、樹脂製である。ただし、コーティング１７の材質は、限定されるものではない。本実施例のコーティング１７の表面粗さは、被覆部１１よりも小さい。このコーティング１７は、被覆部１１（挿入部３）の剛性を向上させるため、仕様に応じて適宜の厚みを有する。 The coating 17 of this embodiment is made of resin. However, the material of the coating 17 is not limited. The surface roughness of the coating 17 of this example is smaller than that of the coating portion 11. The coating 17 has an appropriate thickness according to the specifications in order to improve the rigidity of the coating portion 11 (insertion portion 3).

例えば、コーティング１７を挿入部３の先端部３ａに隣接する領域で薄くして挿入部３に湾曲可能な湾曲部を形成し、挿入部３の他の部分でコーティング１７を厚くして挿入部３に湾曲しない部分を形成してもよい。 For example, the coating 17 is thinned in a region adjacent to the tip 3a of the insertion portion 3 to form a bendable curved portion in the insertion portion 3, and the coating 17 is thickened in other portions of the insertion portion 3 to form the insertion portion 3. A non-curved portion may be formed.

従って、本実施例では、コーティング１７の厚みを調整することによって、挿入部３の剛性を仕様に応じて適宜調整することができる。また、コーティング１７により、挿入部３を被検体へ挿入する際の抵抗を低減でき、挿入部３の保護や挿入作業の円滑化を図ることができる。 Therefore, in this embodiment, the rigidity of the insertion portion 3 can be appropriately adjusted according to the specifications by adjusting the thickness of the coating 17. Further, the coating 17 can reduce the resistance when the insertion portion 3 is inserted into the subject, and can protect the insertion portion 3 and facilitate the insertion work.

その他、本実施例でも、実施例１と同様の作用効果を奏することができる。 In addition, in this example as well, the same action and effect as in Example 1 can be obtained.

図９は、実施例３に係る内視鏡の挿入部の本体管部の要部を示す断面図である。なお、実施例３では、実施例１と対応する構成に同符号を付して重複した説明を省略する。 FIG. 9 is a cross-sectional view showing a main part of the main body tube portion of the insertion portion of the endoscope according to the third embodiment. In the third embodiment, the same reference numerals are given to the configurations corresponding to the first embodiment, and duplicate description will be omitted.

実施例３は、外コイル部１３の巻部１３ｂの断面形状を半円形としたものである。その他は、実施例１と同一である。なお、実施例３の外コイル部１３の構造は、実施例２に適用してもよい。 In the third embodiment, the cross-sectional shape of the winding portion 13b of the outer coil portion 13 is a semicircular shape. Others are the same as in Example 1. The structure of the outer coil portion 13 of the third embodiment may be applied to the second embodiment.

本実施例では、実施例１と同様の作用効果を奏することができながら、径方向のサイズを小さくすることができる。 In this embodiment, the size in the radial direction can be reduced while the same effects as those in the first embodiment can be obtained.

１ 内視鏡
３ 挿入部（挿入体）
５ 操作部
９ 本体管部
１１ 被覆部
１３ 外コイル部
１３ａ 線材
１３ｂ 巻部
１３ｃ 隙間
１５ 内コイル部
１５ａ 線材
１５ｂ 巻部
１５ｃ 隙間
１７ コーティング


1 Endoscope 3 Insertion part (insertion body)
5 Operation part 9 Main body pipe part 11 Covering part 13 Outer coil part 13a Wire rod 13b Winding part 13c Gap 15 Inner coil part 15a Wire rod 15b Winding part 15c Gap 17 Coating

Claims (7)

本体管部の外側を被覆部によって被覆し被検体に挿入自在な内視鏡の挿入体であって、
前記本体管部は、
前記軸方向に複数の巻部を有するコイル状の線材からなり前記コイル状の軸方向に対して湾曲及び復元が可能な弾性を有する外コイル部と、
前記軸方向に複数の巻部を有するコイル状の線材からなり前記外コイル部内に位置して前記外コイル部と共に湾曲及び復元が可能な弾性を有する内コイル部とを備え、
前記外コイル部は、前記軸方向で隣接する巻部間を離間させた複数の隙間を有し、
前記内コイル部は、前記巻部が前記外コイル部の前記隙間に対応して設けられ前記外コイル部の前記隣接する巻部に接触しつつ当該巻部間に嵌合する、
内視鏡の挿入体。 An endoscope insert that can be inserted into a subject by covering the outside of the main body tube with a covering.
The main body tube portion
An outer coil portion made of a coiled wire having a plurality of winding portions in the axial direction and having elasticity capable of bending and restoring in the axial direction of the coil, and an outer coil portion.
It is made of a coiled wire having a plurality of winding portions in the axial direction, and is provided with an inner coil portion that is located inside the outer coil portion and has elasticity that can be curved and restored together with the outer coil portion.
The outer coil portion has a plurality of gaps separated between adjacent winding portions in the axial direction.
The inner coil portion is fitted between the winding portions while the winding portion is provided corresponding to the gap of the outer coil portion and is in contact with the adjacent winding portion of the outer coil portion.
Endoscope insert. 請求項１記載の内視鏡の挿入体であって、
前記外コイル部の線材は、少なくとも前記コイル状の径方向の内側の断面形状が円弧状である、
内視鏡の挿入体。 The endoscope insert according to claim 1.
The wire rod of the outer coil portion has at least an arcuate cross-sectional shape inside the coil shape in the radial direction.
Endoscope insert. 請求項１又は２記載の内視鏡の挿入体であって、
前記内コイル部の線材は、断面形状が円形である、
内視鏡の挿入体。 The endoscope insert according to claim 1 or 2.
The wire rod of the inner coil portion has a circular cross-sectional shape.
Endoscope insert. 請求項１〜３の何れか一項に記載の内視鏡の挿入体であって、
前記被覆部は、前記本体管部よりも捩じれ剛性が高い管体である、
内視鏡の挿入体。 The endoscope insert according to any one of claims 1 to 3.
The covering portion is a tubular body having a higher torsional rigidity than the main body tubular portion.
Endoscope insert. 請求項１〜４の何れか一項に記載の内視鏡の挿入体であって、
前記被覆部は、編組チューブである、
内視鏡の挿入体。 The endoscope insert according to any one of claims 1 to 4.
The covering portion is a braided tube.
Endoscope insert. 請求項１〜５の何れか一項に記載の内視鏡の挿入体であって、
前記被覆部は、外側にコーティングを備えた、
内視鏡の挿入体。 The endoscope insert according to any one of claims 1 to 5.
The coating has a coating on the outside.
Endoscope insert. 請求項１〜６の何れか一項に記載の挿入体を備えた内視鏡であって、
前記挿入体が結合されユーザーが操作するための操作部を備えた、
内視鏡。
An endoscope provided with the insert according to any one of claims 1 to 6.
The insert body is combined and provided with an operation unit for the user to operate.
Endoscope.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540573A (en) * 1895-06-04 Pneumatic straw-stacker
JPS5279947U (en) * 1975-12-12 1977-06-15
JPH03128025A (en) * 1989-10-13 1991-05-31 Machida Seisakusho:Kk Angle for curving operation device
JPH06105798A (en) * 1992-09-30 1994-04-19 Terumo Corp Catheter tube
US5405073A (en) * 1993-12-06 1995-04-11 Ethicon, Inc. Flexible support shaft assembly
JPH07250808A (en) * 1994-03-14 1995-10-03 Olympus Optical Co Ltd Endoscope
JPH07265323A (en) * 1993-12-06 1995-10-17 Ethicon Inc Fastener and stapler device for operation
JP2010063886A (en) * 2008-09-09 2010-03-25 Biosense Webster Inc Deflectable catheter with joined center support, and method of manufacturing the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540573A (en) * 1895-06-04 Pneumatic straw-stacker
JPS5279947U (en) * 1975-12-12 1977-06-15
JPH03128025A (en) * 1989-10-13 1991-05-31 Machida Seisakusho:Kk Angle for curving operation device
JPH06105798A (en) * 1992-09-30 1994-04-19 Terumo Corp Catheter tube
US5405073A (en) * 1993-12-06 1995-04-11 Ethicon, Inc. Flexible support shaft assembly
JPH07265323A (en) * 1993-12-06 1995-10-17 Ethicon Inc Fastener and stapler device for operation
JPH07250808A (en) * 1994-03-14 1995-10-03 Olympus Optical Co Ltd Endoscope
JP2010063886A (en) * 2008-09-09 2010-03-25 Biosense Webster Inc Deflectable catheter with joined center support, and method of manufacturing the same

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