JPS6137935B2 - - Google Patents
Info
- Publication number
- JPS6137935B2 JPS6137935B2 JP54064673A JP6467379A JPS6137935B2 JP S6137935 B2 JPS6137935 B2 JP S6137935B2 JP 54064673 A JP54064673 A JP 54064673A JP 6467379 A JP6467379 A JP 6467379A JP S6137935 B2 JPS6137935 B2 JP S6137935B2
- Authority
- JP
- Japan
- Prior art keywords
- curved
- distal end
- tube
- end side
- flexible tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000903 blocking effect Effects 0.000 claims description 15
- 230000037431 insertion Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000011295 pitch Substances 0.000 description 11
- 238000005452 bending Methods 0.000 description 7
- 239000011152 fibreglass Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000005357 flat glass Substances 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 210000002429 large intestine Anatomy 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 2
- 210000000813 small intestine Anatomy 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Description
【発明の詳細な説明】
この発明は内視鏡における彎曲管の構造に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a curved tube in an endoscope.
一般に内視鏡は、体腔内に挿入される挿入部と
体腔外で種々の操作を行う操作部とで構成され、
上記挿入部は照明用窓および観察用窓などを備え
た先端部、外部からの操作にもとづきこの先端部
の向きを変える彎曲部および体腔内の径路に対応
して自在に屈曲する可撓管部とで形成されてい
る。そして上記彎曲部は、操作部に設けたハンド
ルノブを操作して上記可撓管部内を通じて彎曲部
の先端に連結されたワイヤを引くことにより遠隔
操作にて彎曲させられるようになつている。 Generally, an endoscope consists of an insertion section that is inserted into a body cavity and an operation section that performs various operations outside the body cavity.
The insertion section has a distal end section that is equipped with an illumination window and an observation window, a curved section that changes the direction of the distal end section based on external operations, and a flexible tube section that bends freely in accordance with the path inside the body cavity. It is formed by. The curved portion can be bent by remote control by operating a handle knob provided on the operating portion and pulling a wire connected to the tip of the curved portion through the flexible tube portion.
しかしながら、彎曲部が彎曲する場合は、内部
に導通されているフアイバーグラスからなるイメ
ージガイドやライトガイドなどの抵抗のため、可
撓管部との継ぎ部分から彎曲を開始し、先端部側
の彎曲が最後になることが多い。このような彎曲
性能のものは、上記フアイバーグラスなどの耐久
性能を低下させるばかりでなく、たとえば大腸な
どの検査等のごとく、細い体腔内で大きな屈曲が
要求されるなどの場合には使い難い不具合があつ
た。 However, when the curved section curves, due to the resistance of the image guide, light guide, etc. made of fiberglass that is electrically conductive inside, the curve starts from the joint with the flexible tube section, and the distal end side bends. is often the last. Products with such bending performance not only reduce the durability of the fiberglass mentioned above, but also have the disadvantage that they are difficult to use when large bends are required in narrow body cavities, such as when examining the large intestine. It was hot.
このため従来において、たとえば彎曲部を構成
している螺旋管のピツチを変えたり、または弾性
被覆の肉厚を変化させるなどの手段により、彎曲
部の先端部側が後端部側より彎曲し易くしたも
の、つまり先端部側が軟く構成されたものが開発
されている。 For this reason, in the past, the tip side of the curved part was made easier to curve than the rear end side by, for example, changing the pitch of the helical tube constituting the curved part or changing the thickness of the elastic coating. A type with a soft tip end has been developed.
しかしながらこのように先端部側が軟く構成さ
れたものは、彎曲操作すると先端部側だけが大き
く彎曲されて後端部側は全く彎曲されないことが
ある。 However, in a case where the distal end side is configured to be soft, when a bending operation is performed, only the distal end side may be largely bent, and the rear end side may not be bent at all.
この発明はこのような事情にもとづきなされた
もので、その目的とするところは、彎曲管の先端
部側が後端部側より軟く構成されたものにおい
て、先端部側が所定量彎曲されるとそれ以上の彎
曲を規制して引き続き後端部側が彎曲されるよう
にし、使い勝手が向上する内視鏡の彎曲管を提供
しようとするものである。 This invention was made based on the above circumstances, and its purpose is to provide a curved tube in which the distal end side is softer than the rear end side, and when the distal end side is bent by a predetermined amount, It is an object of the present invention to provide a curved tube for an endoscope that is improved in usability by regulating the above-mentioned curvature so that the rear end side is continuously curved.
以下この発明の一実施例を図面にもとずき説明
する。 An embodiment of the present invention will be described below with reference to the drawings.
図中１は内視鏡の挿入部、２はその操作部であ
る。挿入部１は体腔内に挿入されるもので、先端
部３、彎曲管４および可撓管部５とで構成されて
いる。先端部３は照明系窓ガラス６および観察用
窓ガラス７を有し、上記照明系窓ガラス６はフア
イバーグラスからなるライトガイド８に対向され
ているとともに、イメージ系窓ガラス７は対物レ
ンズ９を介してフアイバーグラスからなるイメー
ジガイド１０に対向されている。これら各ガイド
８および１０は彎曲管４および可撓管部５内を導
通されて操作部２に導びかれ、図示しない光源お
よび接眼部１１に接続されている。 In the figure, 1 is the insertion section of the endoscope, and 2 is its operation section. The insertion section 1 is inserted into a body cavity, and is composed of a distal end section 3, a curved tube 4, and a flexible tube section 5. The distal end portion 3 has an illumination system window glass 6 and an observation window glass 7. The illumination system window glass 6 is opposed to a light guide 8 made of fiberglass, and the image system window glass 7 is opposed to an objective lens 9. The image guide 10 made of fiberglass is opposed to the image guide 10 made of fiberglass. Each of these guides 8 and 10 is conducted through the curved tube 4 and the flexible tube section 5, guided to the operating section 2, and connected to a light source and an eyepiece section 11 (not shown).
上記彎曲管４は、本実施例の場合、螺旋管１２
の外周を合成樹脂などの弾性被覆１３で覆つて構
成されている。そして上記螺旋管１２は、その先
端部側１２ａが後端部側、つまり可撓管部側１２
ｂに比べて螺旋のピツチが疎になるように形成さ
れている。換言すれば螺旋管１２は全長に亘つて
連続に形成されたものであるが、その前半部１２
ａはそのピツチが比較的大きなピツチP1で一様な
疎巻きに形成され、かつ後半部１２ｂは上記ピツ
チP1よりも小さなピツチP2（P1＞P2）で一様な密
巻きに形成されている。この結果彎曲管４にあつ
ては先端部側が可撓管側に比べて軟く、つまり彎
曲し易くなつている。 In the case of this embodiment, the curved pipe 4 is a spiral pipe 12.
The outer periphery thereof is covered with an elastic coating 13 made of synthetic resin or the like. The helical tube 12 has its distal end side 12a facing the rear end side, that is, the flexible tube side 12a.
It is formed so that the pitch of the spiral is sparser than that in b. In other words, the spiral tube 12 is formed continuously over the entire length, but the front half 12
A is formed into a uniform loose winding with a relatively large pitch P 1 , and the rear part 12b is formed into a uniform dense winding with a pitch P 2 (P 1 > P 2 ) smaller than the pitch P 1. It is formed. As a result, the tip side of the curved tube 4 is softer than the flexible tube side, that is, it is easier to bend.
上記彎曲管４内には索条体としてのワイヤ１４
ａ，１４ｂが互に対向する内面に沿つて挿通され
ている。これらワイヤ１４ａ，１４ｂの各一端は
彎曲管４内の螺旋管１２の先端部位、本実施例で
は先端部３に連結されており、かつ各他端は可撓
管部５内を通じて操作部２に装着したハンドルノ
ブ１５に巻回されている。そしてハンドルノブ１
５を回動操作するといづれか一本のワイヤが引か
れると同時に他方のワイヤが弛められるので彎曲
部４が彎曲変形されるようになつている。 A wire 14 as a cable body is disposed inside the curved pipe 4.
a and 14b are inserted along the inner surfaces facing each other. One end of each of these wires 14a, 14b is connected to the distal end portion of the spiral tube 12 in the curved tube 4, which is the distal end portion 3 in this embodiment, and the other end thereof is connected to the operating portion 2 through the flexible tube portion 5. It is wound around the attached handle knob 15. and handle knob 1
When 5 is rotated, one of the wires is pulled and at the same time the other wire is loosened, so that the curved portion 4 is deformed into a curved shape.
上記螺旋管１２の内面には、上記ワイヤ１４
ａ，１４ｂに沿つてワイヤ保持部材１６…が取着
されている。この場合、ワイヤ保持部材１６…は
先端部側１２ａにおいては螺旋管の１ピツチ毎に
設けられているが、可撓管部側１２ｂにおいては
螺旋管の２ピツチ毎に設けられている。上記ワイ
ヤ１４ａ，１４ｂはこれら各ワイヤ保持部材１６
…に摺動自在に係止されている。ところで上記疎
巻きの先端部側１２ａと密巻きの可撓管部側１２
ｂとの境界部分においてはワイヤ保持部材１６…
が設けられてなく、その代りに上記ワイヤ１４ａ
および１４ｂに係合子１７ａ，１７ｂが固着され
ている。これら係合子１７ａ，１７ｂは、第２図
に示されるように、彎曲部４が真直状態において
は疎巻き先端部側１２ａのワイヤ保持部材１６…
の一番近いもの１６ａ，１６ｂに対してギヤツプ
S1，S1を保つて離間するようになつており、彎曲
部４が後述するように彎曲された状態にあつては
一方の係合子１７ａまたは１７ｂが上記一番近い
ワイヤ保持部材１６ａ，１６ｂに衝止するように
なつている。したがつてこれらワイヤ保持部材１
６ａ，１６ｂは本発明の衝止部材を兼用してい
る。 The inner surface of the spiral tube 12 has the wire 14
Wire holding members 16 are attached along lines a and 14b. In this case, the wire holding members 16 are provided at every pitch of the helical tube on the distal end side 12a, but are provided at every two pitches of the helical tube on the flexible tube side 12b. The wires 14a, 14b are connected to each wire holding member 16.
It is slidably locked to... By the way, the loosely wound tip end side 12a and the tightly wound flexible tube side 12a
At the boundary with b, wire holding members 16...
is not provided, and instead the wire 14a is
Engagement members 17a and 17b are fixed to and 14b. As shown in FIG. 2, when the curved portion 4 is in a straight state, these engaging members 17a and 17b are connected to the wire holding member 16 on the loosely wound tip end side 12a...
gap to the nearest ones 16a, 16b.
S 1 and S 1 are maintained and separated, and when the curved portion 4 is in a curved state as described later, one of the engaging elements 17a or 17b is connected to the wire holding member 16a, 16b which is the closest to the wire holding member 16a, 16b. It's starting to come to an end. Therefore, these wire holding members 1
6a and 16b also serve as the blocking members of the present invention.
なお、１８は彎曲管４と可撓管部５とを連結す
る連結管、１９ａ，１９ｂは可撓管部５内に設け
られたワイヤ案内管を示す。 Note that 18 is a connecting pipe that connects the curved tube 4 and the flexible tube section 5, and 19a and 19b are wire guide tubes provided in the flexible tube section 5.
このように構成された実施例の作用について説
明する。 The operation of the embodiment configured as described above will be explained.
ハンドルノブ１５を回転して一方のワイヤ１４
ａを引くと他方のワイヤ１４ｂが弛められ、した
がつて彎曲部４は第３図に示されるように彎曲さ
れる。この場合、彎曲部４の螺旋管１２は先端部
側１２ａのピツチP1が可撓管部側１２ｂのピツチ
P2よりも大きい（P1＞P2）ため、先端部側１２ａ
が可撓管部側１２ｂより軟く、したがつて一方の
ワイヤ１４ａが引かれることにより第３図のよう
に先端部側１２ａから彎曲を開始する。 Rotate the handle knob 15 to connect one wire 14
By pulling a, the other wire 14b is loosened, so that the curved portion 4 is curved as shown in FIG. In this case, in the spiral tube 12 of the curved portion 4, the pitch P1 on the distal end side 12a is the same as the pitch P1 on the flexible tube side 12b.
Since it is larger than P 2 (P 1 > P 2 ), the tip side 12a
is softer than the flexible tube side 12b, so when one wire 14a is pulled, the bending starts from the distal end side 12a as shown in FIG.
このような彎曲においては、ほぼ彎曲管４の管
軸が彎曲の中立線O1―O1となるので、吸引され
るワイヤ１４ａ側の彎曲管は圧縮変形されるとと
もに、繰り出されるワイヤ１４ｂ側の彎曲管は引
張変形される。したがつて中立線O1―O1を境と
して内側のワイヤ１４ａ側の螺旋管のピツチP′は
小さく（P′＜P1）なり、かつ外側のワイヤ１４ｂ
側の螺旋管のピツチP1″は大きく（P″＞P1）な
る。しかるに、ワイヤ１４ａ，１４ｂにあつては
これ自身伸縮しないので、彎曲管に対し相対的に
変位し、しかもこれらワイヤ１４ａ，１４ｂは螺
旋管１２の内面に固定されたワイヤ保持部材１６
…に摺動自在に係止されているので、外側のワイ
ヤ１４ｂにあつてはこれに固定した係合子１７ｂ
がワイヤ保持部材兼用の衝止部材１６ｂ側に移動
してそのギヤツプS1″が小さく（S1″＜S1）なり、
かつ内側のワイヤ１４ａはこれに固定した係合子
１７ａがワイヤ保持部材兼用の衝止部材１６ａか
ら遠ざかつてギヤツプS1″が大きく（S1′＞S1）な
る。 In such a curve, the tube axis of the curved tube 4 almost becomes the neutral line O 1 - O 1 of the curve, so the curved tube on the side of the wire 14a to be sucked is compressed and deformed, and the side of the wire 14b to be paid out is compressed and deformed. The curved tube is tensile deformed. Therefore, the pitch P' of the spiral tube on the inner wire 14a side with respect to the neutral line O 1 - O 1 becomes small (P'<P 1 ), and
The pitch P 1 ″ of the side spiral tube becomes large (P ″>P 1 ). However, since the wires 14a and 14b do not expand or contract themselves, they are displaced relative to the curved tube.
Since it is slidably locked to the outer wire 14b, the engager 17b fixed thereto
moves toward the blocking member 16b, which also serves as a wire holding member, and its gap S 1 ″ becomes smaller (S 1 ″<S 1 ),
In addition, as the engager 17a fixed to the inner wire 14a moves away from the blocking member 16a which also serves as a wire holding member, the gap S 1 ″ becomes larger (S 1 ′>S 1 ).
そして、さらに内側のワイヤ１４ａが引かれて
彎曲部４における先端部側１２ａが彎曲される
と、外側のワイヤ１４ｂの係合子１７ｂがワイヤ
保持部材兼用の衝止部材１６ｂに衝止する
（S″＝Ｏ）。このような衝止状態になると、螺旋
管１２における先端部側１２ａはそのピツチ
P1″をそれ以上増すことができないからこれ以上
の彎曲が阻止される。そして外側の係合子１７ｂ
が衝止部材１６ｂに衝止したのちにさらに内側の
ワイヤ１４ａを引けば、外側の係合子１７ｂが衝
止部材１６ｂを先端側に向つて押すことになる。
しかるにこの衝止部材１６ｂを固定している部位
の螺旋部が先端側に押されると、螺旋管１２の先
端部側１２ａと可撓管部側１２ｂとは連続して成
形されていることから、上記押した分だけ密巻き
部分の螺旋管１２ｂは疎巻き状態へと変化し、こ
の結果密巻き部分、つまり可撓管部側１２ｂが第
４図のように彎曲することになる。 Then, when the inner wire 14a is further pulled and the tip end side 12a of the curved portion 4 is bent, the engager 17b of the outer wire 14b hits the blocking member 16b which also serves as a wire holding member (S'' =O).When such a blocking state occurs, the tip end side 12a of the spiral tube 12
Since P1 '' cannot be increased any further, further curvature is prevented.Then, the outer engager 17b
If the inner wire 14a is further pulled after the wire 14b hits the blocking member 16b, the outer engaging element 17b will push the blocking member 16b toward the distal end side.
However, when the helical portion of the portion fixing the blocking member 16b is pushed toward the distal end, since the distal end side 12a and the flexible tube side 12b of the spiral tube 12 are continuously formed, The tightly wound portion of the helical tube 12b changes to a loosely wound state by the amount of pushing described above, and as a result, the tightly wound portion, that is, the flexible tube side 12b, is curved as shown in FIG.
したがつてこのような実施例によると、彎曲部
４においては先端部側から必ず彎曲を開始し、こ
の先端部側の彎曲が一定に至るとそれ以後は必ず
可撓管部側（後端側）が彎曲を開始することにな
る。このため、たとえば大腸や小腸などのように
体腔の径が狭く、しかも曲がりの多い部分に使用
する場合には、彎曲管４は先端部側から彎曲を開
始するので先端部３の向きを小さいスペース内で
容易に変えることができ、よつて体腔の途中を観
察することができるばかりでなく、上記体腔に沿
つて方向制御がし易くなる。しかも彎曲管４にあ
つては上記のように先端部側が一定量彎曲したの
ちに可撓管部側が彎曲するから、体腔の曲がりに
対応し易く、使い勝手が向上することになる。 Therefore, according to such an embodiment, the curved portion 4 always starts curving from the distal end side, and once the curvature on the distal end side reaches a certain level, it always starts curving from the flexible tube side (rear end side). ) will start the curve. Therefore, when used in a body cavity with a narrow diameter and many bends, such as the large intestine or small intestine, the curved tube 4 starts curving from the distal end side, so the direction of the distal end section 3 is adjusted to fit into a small space. This not only allows for observation along the body cavity, but also facilitates directional control along the body cavity. Moreover, in the case of the curved tube 4, as described above, after the distal end side is curved by a certain amount, the flexible tube side is curved, so that it can easily accommodate bends in the body cavity and improve usability.
なお、この発明は上記実施例に制約されるもの
ではない。すなわち、たとえば彎曲管４の先端部
側を軟くして曲がり易くするためには、弾性被覆
１３の肉厚を先端部側が薄くなるように構成して
もよいものである。 Note that this invention is not limited to the above embodiments. That is, for example, in order to soften the distal end side of the curved tube 4 and make it easier to bend, the elastic coating 13 may be configured to have a thinner wall thickness on the distal end side.
また、上記実施例では彎曲管４の操作用ワイヤ
１４ａ，１４ｂに直接係合子１７ａ，１７ｂを固
定してこれらワイヤ１４ａ，１４ｂを規制索条体
として兼用するようにしたが、操作ワイヤと規制
用の索条体とは互に独立して構成するようにして
もよく、かつ衝止部材はワイヤ保持部材とは別に
構成してもよいものである。 In addition, in the above embodiment, the engaging members 17a and 17b are directly fixed to the operating wires 14a and 14b of the curved tube 4, so that these wires 14a and 14b are also used as regulating cables. The blocking member may be constructed independently from the wire holding member, and the blocking member may be constructed separately from the wire holding member.
以上詳述したこの発明によれば、彎曲管の先端
部側を可撓管部側に比べて軟くし、この彎曲管の
内周面に沿つて一端が先端部位に連結されるとと
もに他端が上記剛性が変わる部分よりも後方に導
びかれた規制索条体を配設し、上記剛性が変わる
部位の近傍に位置して上記彎曲管の内面に上記索
条体が摺動可能に挿通される衝止部材を固定し、
かつ上記索条体には上記彎曲管の先端側が所定量
彎曲されたときに上記衝止部材に衝突してこの彎
曲管先端側のそれ以上の彎曲を規制する係合子を
固設したものである。したがつてこのものによる
と、彎曲管を彎曲させると軟い先端部側から彎曲
を開始するので、大腸や小腸などのように狭い体
管内で先端部の向きを変え易く、かつ屈曲の多い
体腔であつてもその向きの制御が容易に行える。
しかも引続き彎曲操作した場合上記先端部側の彎
曲が一定に達すると、この先端部側の彎曲を保持
したままこの彎曲管の可撓管部側が円滑に彎曲す
るので、体腔の屈曲に対応し易く、挿入操作が容
易に行えて使い勝手が向上するなどの利点があ
る。 According to the invention described in detail above, the distal end side of the curved tube is made softer than the flexible tube side, and one end is connected to the distal end portion along the inner circumferential surface of the curved tube, and the other end is connected to the distal end portion along the inner peripheral surface of the curved tube. A regulating cable body is disposed that is guided rearward of the part where the rigidity changes, and the cable body is slidably inserted into the inner surface of the curved pipe so as to be located near the part where the stiffness changes. fix the blocking member,
Further, an engaging element is fixed to the cable body to collide with the blocking member when the distal end side of the curved pipe is bent by a predetermined amount, and to restrict further curving of the distal end side of the curved pipe. . Therefore, according to this document, when a curved tube is bent, the bending starts from the soft tip side, so it is easy to change the direction of the tip in a narrow body canal such as the large intestine or small intestine, and it can be used in body cavities with many bends. Even if it is, the direction can be easily controlled.
Moreover, when the bending operation is continued, when the curvature on the distal end side reaches a certain level, the flexible tube side of the bending tube curves smoothly while maintaining the curvature on the distal end side, making it easier to cope with the bending of the body cavity. , it has advantages such as easy insertion operation and improved usability.
図面はこの発明の一実施例を示し、第１図は内
視鏡の全体を示す側面図、第２図はその要部の断
面図、第３図および第４図はそれぞれ作動状態を
示す断面図である。
１…挿入部、２…操作部、３…先端部、４…彎
曲管、５…可撓管部、１２…螺旋管、１３…弾性
被覆、１４ａ，１４ｂ…ワイヤ、１６…ワイヤ保
持部材、１６ａ，１６ｂ…ワイヤ保持兼用衝止部
材、１７ａ，１７ｂ…係合子。
The drawings show one embodiment of the present invention, in which Fig. 1 is a side view showing the entire endoscope, Fig. 2 is a sectional view of its main parts, and Figs. 3 and 4 are sectional views showing the operating state. It is a diagram. DESCRIPTION OF SYMBOLS 1... Insertion part, 2... Operation part, 3... Tip part, 4... Curved tube, 5... Flexible tube part, 12... Spiral tube, 13... Elastic coating, 14a, 14b... Wire, 16... Wire holding member, 16a , 16b... Wire holding and blocking member, 17a, 17b... Engagement element.
Claims (1)
由に屈曲可能な可撓管部と、これら先端部と可撓
管部の間に介挿され外部からの操作により彎曲さ
れる彎曲管とを具備した内視鏡の挿入部におい
て、上記彎曲管は上記先端部側の剛性を可撓管側
の剛性より低くし、この彎曲管の内周面に沿つて
一端が先端部位に連結されるとともに他端が上記
剛性が変わる部分よりも後方に導びかれた規制索
条体を配設し、上記剛性が変わる部位の近傍に位
置して上記彎曲管の内面に上記索条体が摺動可能
に挿通される衝止部材を固定し、かつ上記索条体
には上記彎曲管の先端側が所定量彎曲されたとき
に上記衝止部材に衝突してこの彎曲管先端側のそ
れ以上の彎曲を規制する係合子を固設したことを
特徴とする内視鏡の彎曲管。1. A distal end, a flexible tube that can be bent freely according to the path of the body cavity into which it is inserted, and a curved tube that is inserted between the distal end and the flexible tube and can be bent by external operation. In the insertion section of the endoscope, the curved tube has a distal end side with lower rigidity than a flexible tube side, and one end of the curved tube is connected to the distal end portion along an inner circumferential surface of the curved tube. At the same time, a regulating cable body is arranged, the other end of which is guided to the rear of the part where the rigidity changes, and the regulation cable body is located near the part where the stiffness changes, and the cable body slides on the inner surface of the curved pipe. A blocking member that can be inserted through the cable is fixed, and the cable body has a structure that when the distal end side of the curved pipe is bent by a predetermined amount, it collides with the blocking member and causes the distal end side of the curved pipe to curve further. A curved tube for an endoscope, characterized in that an engaging element is fixedly installed to regulate the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6467379A JPS55158028A (en) | 1979-05-25 | 1979-05-25 | Curved tube for endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6467379A JPS55158028A (en) | 1979-05-25 | 1979-05-25 | Curved tube for endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55158028A JPS55158028A (en) | 1980-12-09 |
| JPS6137935B2 true JPS6137935B2 (en) | 1986-08-26 |
Family
ID=13264923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6467379A Granted JPS55158028A (en) | 1979-05-25 | 1979-05-25 | Curved tube for endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55158028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2717025B2 (en) * | 1990-07-10 | 1998-02-18 | 富士通株式会社 | Print head |
-
1979
- 1979-05-25 JP JP6467379A patent/JPS55158028A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2717025B2 (en) * | 1990-07-10 | 1998-02-18 | 富士通株式会社 | Print head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55158028A (en) | 1980-12-09 |
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