JPH0324217B2 - - Google Patents
Info
- Publication number
- JPH0324217B2 JPH0324217B2 JP60264131A JP26413185A JPH0324217B2 JP H0324217 B2 JPH0324217 B2 JP H0324217B2 JP 60264131 A JP60264131 A JP 60264131A JP 26413185 A JP26413185 A JP 26413185A JP H0324217 B2 JPH0324217 B2 JP H0324217B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- insertion section
- fitting
- center
- gripping
- 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 - Lifetime
Links
- 210000000078 claw Anatomy 0.000 claims description 56
- 230000037431 insertion Effects 0.000 claims description 31
- 238000003780 insertion Methods 0.000 claims description 31
- 238000005452 bending Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 description 8
- 239000004575 stone Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 210000003445 biliary tract Anatomy 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 201000001883 cholelithiasis Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 208000001130 gallstones Diseases 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は挿入部先端に把持爪を備えた内視鏡に
係り、特に胆道内結石の如く比較的大形な対象物
の摘出、破砕等に好適な内視鏡に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an endoscope equipped with a grasping claw at the tip of the insertion section, and is particularly suitable for extracting and crushing relatively large objects such as stones in the biliary tract. This invention relates to a suitable endoscope.
従来の内視鏡は胆石等を摘出するのに挿入部先
端の鉗子口を介して挿入部内方から挿入部先端外
方にバスケツト、鉗子等の各種処置具を突出させ
て結石等の摘出や破砕操作を行なうようにしてい
る。
Conventional endoscopes remove gallstones, etc. by protruding various treatment tools such as baskets and forceps from the inside of the insertion tube to the outside of the tip of the insertion tube through the forceps port at the tip of the insertion tube. I am trying to perform the operation.
しかし、内視鏡挿入部先端の径及びこれに開口
される鉗子口の大きさには一定の制限があり、し
たがつて鉗子口に通す処置具の能力も大きさの面
から制約を受ける。 However, there are certain limitations on the diameter of the tip of the endoscope insertion portion and the size of the forceps port opened therein, and therefore the ability of the treatment tool to pass through the forceps port is also limited in terms of size.
このため、従来の内視鏡では胆道内に生じた比
較的大きい結石等の摘出や破砕が十分に行えない
不具合があつた。 For this reason, conventional endoscopes have had the problem of not being able to sufficiently remove or crush relatively large stones and the like that occur within the biliary tract.
本発明はこのような事情に鑑みてなされたもの
で、体腔内の大きな対象物等を確実に把持して、
その摘出や破砕等の処置が確実に行なえると共に
挿入部先端から前方が充分観察できる内視鏡を提
案することを目的としている。
The present invention has been made in view of the above circumstances, and is capable of reliably grasping large objects within the body cavity.
The purpose of the present invention is to propose an endoscope that can reliably carry out treatments such as extraction and crushing, and also allows sufficient observation of the front from the distal end of the insertion section.
本発明は、前記目的を達成する為に、挿入部先
端に支軸を介して一対の把持爪を開閉可能に設
け、その各把持爪を挿入部内に挿通した操作ワイ
ヤを介して、開閉動作させるようにしたものであ
る。
In order to achieve the above object, the present invention provides a pair of gripping claws that can be opened and closed via a support shaft at the tip of the insertion section, and each of the gripping claws is operated to open and close via an operating wire inserted into the insertion section. This is how it was done.
以下、添付図面に従つて本発明に係る内視鏡の
好ましい実施例を詳説する。
Hereinafter, preferred embodiments of the endoscope according to the present invention will be described in detail with reference to the accompanying drawings.
第１図に示すように挿入部２は、湾曲部４とそ
の先端に取付けた先端金具６を有し、湾曲部４
は、複数の節輪８から構成され、節輪８の外側は
ゴム或いは合成樹脂製のチユーブ等の被覆材１４
で被覆されている。 As shown in FIG. 1, the insertion section 2 has a curved section 4 and a distal end fitting 6 attached to the distal end of the curved section 4.
is composed of a plurality of joint rings 8, and the outside of the joint rings 8 is covered with a covering material 14 such as a tube made of rubber or synthetic resin.
covered with.
第２図に示すように挿入部２内には一対、ある
いは左右上下の四方向への湾曲ができるようにし
たものにあつては周知のように二対の湾曲操作用
ワイヤ１６を挿入部２後端の図示しない操作部で
操作することにより、湾曲部４を湾曲することが
できる（第９図参照）。 As shown in FIG. 2, a pair of bending operation wires 16 are installed inside the insertion section 2, or two pairs of bending operation wires 16 are installed in the insertion section 2 as is well known in the case of a device that can bend in four directions (left, right, top, and bottom). The bending portion 4 can be bent by operating an operation section (not shown) at the rear end (see FIG. 9).
先端金具６は第１図に示すようにその円筒基部
１８が上記節輪８の先頭部に接続され被覆材１４
でその円筒基部１８が被覆され、外側から糸締付
具２０で結束保持されている。この先端金具６の
先端側に取付けらる把持爪ユニツトは第３図で示
すように軸受２２と、この軸受２２に支軸２６，
２６を介して取付けられた一対の把持爪２４，２
４とから構成されている（第５図、第６図参照）。
なお先端金具６の先端部は段付形状とされ、その
段部に後述するユニツトの軸受２２が嵌込まれ、
接着等により固定される。この軸受２２の表面に
形成した２枚の突片２８，２８に把持爪２４のボ
ス部２４ａが支軸２６を介して回転自在に支持さ
れている。 As shown in FIG.
The cylindrical base portion 18 is covered with a thread fastener 20 from the outside. As shown in FIG. 3, the gripping claw unit attached to the tip side of the tip fitting 6 includes a bearing 22, a support shaft 26,
A pair of gripping claws 24, 2 attached via 26
4 (see Figures 5 and 6).
The tip of the tip fitting 6 has a stepped shape, and a bearing 22 of the unit, which will be described later, is fitted into the stepped portion.
It is fixed by adhesive etc. A boss portion 24a of the gripping claw 24 is rotatably supported by two protrusions 28, 28 formed on the surface of the bearing 22 via a support shaft 26.
各支軸２６，２６は第４図並びに第１０図に示
すように、先端金具６の中心から外側に離れた位
置に配置され、把持爪２４，２４をそれぞれ離間
した二点で回動支持する。これにより、第１０図
に示すように、先端金具６の中心位置に空間を確
保することができ、その部分に後述する鉗子チヤ
ンネルを設けることを可能とし、また、第１０図
に示すように、内視鏡先端部の外側に把持爪２
４，２４の回動支点を配置させて、より大きな異
物の把持を可能としている。つまり、把持爪を第
１０図の仮想線ａで示すように先端部中心の支点
ｂで支持する場合に比べて、より大きな直径Ｄの
異物３２を把持することができる（仮想線ａの把
持爪では爪先端間の距離が小さくなり、把持でき
る異物３２′の径ｄは小さいということと、爪角
度が小さくなり異物を把持しやすいことに基づ
く。）。 As shown in FIGS. 4 and 10, each support shaft 26, 26 is arranged at a position apart from the center of the tip fitting 6, and rotatably supports the gripping claws 24, 24 at two points spaced apart from each other. . As a result, as shown in FIG. 10, a space can be secured at the center position of the tip fitting 6, and a forceps channel, which will be described later, can be provided in that part. There are two gripping claws on the outside of the end of the endoscope.
By arranging 4 and 24 pivot points, it is possible to grasp a larger foreign object. In other words, compared to the case where the gripping claws are supported at the fulcrum point b at the center of the tip as shown by the imaginary line a in FIG. This is based on the fact that the distance between the tips of the claws is small, the diameter d of the foreign object 32' that can be gripped is small, and the angle of the claws is small, making it easier to grip the foreign object).
把持爪２４の形状は使用目的に応じて種々設定
できる。この実施例では比較的幅広い角形で先端
側が対向方向に折曲した形状としているが、先端
側がスプーン状に湾曲する形状にしたり、先細テ
ーパ付、その他の形状にしてもよい。なお、把持
爪２４の基端側は第８図に示すように、軸受２２
と反対側の部分に切開部３４を有する形状となつ
ている。これにより、切開部３４が窓状に開き、
後述するように観察の視野が広げられる。 The shape of the gripping claws 24 can be set in various ways depending on the purpose of use. In this embodiment, the tip has a relatively wide rectangular shape with the distal end bent in opposite directions, but the distal end may be curved into a spoon shape, tapered, or other shapes. Note that the base end side of the gripping claw 24 is attached to a bearing 22 as shown in FIG.
The shape has an incision 34 on the opposite side. As a result, the incision 34 opens like a window,
As will be described later, the field of observation is expanded.
各把持爪２４，２４は、挿入部２内に挿通した
操作ワイヤの押引により開閉動作するようになつ
ている。即ち、第１図、第４図に示すように把持
爪２４の基端部には、支軸２６よりも挿入部中心
側にこれと平行に操作用のピン３８が挿着されて
いる。このピン３８にレバー４０が連結され、レ
バー４０は、挿入部に挿通した爪開閉操作用ワイ
ヤ４２先端の円柱状ワイヤ止め４４にピン４６を
介して連結されている。レバー４０は先端金具６
にあけたガイド孔４８内に挿通されている。 Each of the gripping claws 24, 24 is configured to open and close by pushing and pulling an operating wire inserted into the insertion portion 2. That is, as shown in FIGS. 1 and 4, an operating pin 38 is inserted into the base end of the gripping claw 24 closer to the center of the insertion portion than the support shaft 26 and in parallel therewith. A lever 40 is connected to this pin 38, and the lever 40 is connected via a pin 46 to a cylindrical wire stop 44 at the tip of a nail opening/closing operation wire 42 inserted into the insertion portion. The lever 40 is the tip metal fitting 6
The guide hole 48 is inserted into the guide hole 48 .
しかして、操作者が挿入部２後端の図示しない
周知の鉗子湾曲操作ノブの如く構成された操作ノ
ブを操作すれば、ワイヤ４２を介して伝達される
押引力によりレバー４０がガイド孔４８内で進退
し、それにより把持爪２４が開閉する。なお、ワ
イヤ４２引張時に把持爪２４が閉じるので、異物
の把持は確実なものとなる。 When the operator operates an operation knob (not shown) configured like a well-known forceps bending operation knob at the rear end of the insertion section 2, the lever 40 is moved into the guide hole 48 by the pushing and pulling force transmitted via the wire 42. The gripping claws 24 open and close. Note that since the gripping claws 24 close when the wire 42 is pulled, the foreign object can be gripped reliably.
ところで把持爪２４は、支軸２６及び軸受２２
は、先端金具６に対してユニツトとして組込まれ
ている。即ち、先端金具６、軸受２２、把持爪２
４、レバー４０等は全て挿入部２の軸方向に沿つ
て組立てられ、支軸２６及び各ピン３８，４６は
挿入部２の軸心と直交する方向から所定の支持孔
にそれぞれ挿入後、接着されている。その組込み
は、第１１図、第１２図に示すようにまず予め把
持爪２４と軸受２２、レバー４０等の組立て及び
ワイヤ４２の接合を行なう。一方、把持爪２４の
作動調整及び先端金具６への光学系のレンズ組み
込み、焦点調整等を行なつておく。そして、ワイ
ヤ４２の引込み及び軸受２２の先端金具６への嵌
込み、接着等を行なう。ユニツトの嵌込み、接着
は、軸受２２に突設された３本のピン１００，１
００，１００を金具６に穿設された孔１０２，１
０２，１０２に嵌入して行う。 By the way, the gripping claw 24 is attached to the support shaft 26 and the bearing 22.
is incorporated into the tip fitting 6 as a unit. That is, the tip metal fitting 6, the bearing 22, the gripping claw 2
4. The lever 40, etc. are all assembled along the axial direction of the insertion section 2, and the support shaft 26 and each pin 38, 46 are inserted into the predetermined support holes from the direction perpendicular to the axis of the insertion section 2, and then glued. has been done. To assemble it, as shown in FIGS. 11 and 12, first, the gripping claw 24, bearing 22, lever 40, etc. are assembled and the wire 42 is joined. On the other hand, the operation of the gripping claw 24 is adjusted, the lens of the optical system is assembled into the tip fitting 6, the focus is adjusted, etc. Then, the wire 42 is pulled in, the bearing 22 is fitted into the end fitting 6, and the wire 42 is bonded. Fitting and gluing of the unit is done using three pins 100, 1 protruding from the bearing 22.
00,100 are holes 102,1 drilled in the metal fitting 6.
This is done by inserting into 02,102.
このようなユニツト構造およびピン接合構造に
よれば、レンズ組込みや把持爪２４の作動調整終
了後にユニツト部分を先端金具６に組立てること
ができ、しかも支軸２２およびピン３８，４６は
接着によるものであるから、ハンダ付けやカシメ
等と異なり熱や衝撃を与えることがなく、レンズ
の焦点や把持爪２４の動作に悪影響を与えない。
したがつて、後の再調整等も要しない確実な組立
が、容易かつ迅速に行なえる。 According to such a unit structure and pin joint structure, the unit part can be assembled to the tip fitting 6 after the lens has been assembled and the operation adjustment of the gripping claw 24 has been completed, and furthermore, the support shaft 22 and the pins 38, 46 are not glued together. Because of this, unlike soldering or caulking, no heat or impact is applied, and the focus of the lens and the operation of the gripping claws 24 are not adversely affected.
Therefore, reliable assembly can be performed easily and quickly without requiring subsequent readjustments.
また第２図、第４図および第８図等に示すよう
に、対物レンズ５０は、先端金具６に接着固定さ
れる軸受２２の嵌合部と異なる側、つまり先端段
部の後部側に設けられている。この対物レンズ５
０の位置は、各把持爪２４の支軸２２の軸心e1，
e2（第４図）の間の中心位置で、かつ先端金具６
の外周側に変位した部分に配置されている。この
対物レンズ５０の後方には対物レンズ５０に基づ
く観察像を前記操作部に設けた接眼部に伝送する
イメージガイド用フアイバ束５２の入射端部が保
持パイプ５４を介して連結されている。そのフア
イバ束５２は挿入部２後端側へと導かれ、図示し
ない操作部の接眼へ像電送をする。対物レンズ５
０をこのような配置構成としたことにより、観察
範囲は把持爪２４の内外に亘つて広く設定するこ
とができる。第５図〜第７図に観察範囲を示す。
即ち、対物レンズ５０は支軸２６の軸心e1，e2間
の中心位置にあるから、第５図に示すように、把
持爪２４を閉じた状態では把持爪２４の各内側を
平均的に観察できる（なお対物レンズ５０による
視野は図示のθ0の如く例えば110°とする）。また、
把持爪２４を開いた状態では第６図に示すように
把持爪２４の先端部間を介して外方（前方）が開
き角度θだけ観察できるとともに、110°以内の範
囲θ′で把持爪２４の内側を観察できる。一方、爪
の幅方向においては、把持爪２４を閉じた状態で
は、第７図に示すように、対物レンズ５０が偏位
した側の外部一定範囲θ1を観察できるほか、先端
部軸線に沿つて爪内側一定範囲θ2で爪内側観察が
可能であり、対物レンズ５０と反対の側では一定
範囲θ3で爪内外の観察が行なえる。 Further, as shown in FIGS. 2, 4, and 8, the objective lens 50 is provided on a side different from the fitting portion of the bearing 22 that is adhesively fixed to the tip fitting 6, that is, on the rear side of the tip stepped portion. It is being This objective lens 5
0 position is the axis e 1 of the support shaft 22 of each gripping claw 24,
e 2 (Fig. 4), and the end fitting 6
It is located at a portion displaced toward the outer circumference of the Behind the objective lens 50, an input end of an image guide fiber bundle 52 for transmitting an observation image based on the objective lens 50 to an eyepiece provided in the operating section is connected via a holding pipe 54. The fiber bundle 52 is guided to the rear end side of the insertion section 2 and transmits an image to the eyepiece of an operation section (not shown). Objective lens 5
By arranging the gripping claw 24 in this manner, the observation range can be set to be wide ranging from the inside to the outside of the gripping claw 24. The observation range is shown in FIGS. 5 to 7.
That is, since the objective lens 50 is located at the center between the axes e 1 and e 2 of the support shaft 26, as shown in FIG. (Note that the field of view through the objective lens 50 is, for example, 110°, as shown in θ 0 ). Also,
When the gripping claws 24 are open, as shown in FIG. You can observe the inside of. On the other hand, in the width direction of the claw, when the gripping claw 24 is closed, as shown in FIG . Therefore, the inside of the nail can be observed within a certain range θ 2 inside the nail, and the inside and outside of the nail can be observed within a certain range θ 3 on the opposite side from the objective lens 50.
なお、把持爪２４の基端側に切開部３４を設け
たことにより、把持爪２４を閉じた場合の観察範
囲の狭少化が防止される。即ち、各把持爪２４の
支点を個別として離間させた構成においては、把
持爪２４を開いた場合に各支点を中心にそれぞれ
基端側が逆に閉じ状態となつて視野を狭める可能
性がある。この点、切開部３４が対物レンズ５０
側に設けてあるこの実施例では切開部３４により
常に一定範囲の開口量が確保され、爪閉塞時に設
定した観察範囲が爪開放時にも失われない。 Note that by providing the incision portion 34 on the proximal end side of the gripping claw 24, narrowing of the observation range when the gripping claw 24 is closed is prevented. That is, in a configuration in which the fulcrums of each gripping claw 24 are separate and separated from each other, when the gripping claws 24 are opened, the proximal ends of each gripping claw 24 may become closed around the fulcrum, narrowing the field of view. In this point, the incision 34 is connected to the objective lens 50.
In this embodiment, which is provided on the side, the incision 34 always ensures a constant opening amount, and the observation range set when the nail is closed is not lost even when the nail is opened.
なお、第４図に示すように、照明窓５６は先端
金具６の先端面に、対物レンズ５０に近接して配
設され、把持爪２４の内外に投光するようになつ
ている。 As shown in FIG. 4, the illumination window 56 is disposed on the distal end surface of the distal end fitting 6, close to the objective lens 50, and is adapted to project light into and out of the gripping claw 24.
そして、把持爪２４の内面側には光の反射防止
用コーテイングが施されている。即ち前記の如
く、イメージガイド５０から把持爪２４の内側が
観察されるから、把持爪２４を例えば光沢のある
金属製としたような場合、把持爪２４の内側面で
反射したライトガイド５６からの光が散乱して観
察の妨げになる可能性がある。そこで、金属製把
持爪２４の場合は例えば黒色酸化処理や黒色つや
消し塗装等を施して、光を吸収するようにしたも
のである。なお、把持爪２４の材質に応じて他の
手段を施してもよいことは勿論である。 The inner surface of the gripping claw 24 is coated with anti-reflection coating. That is, as described above, since the inside of the gripping claw 24 is observed from the image guide 50, if the gripping claw 24 is made of shiny metal, for example, the light from the light guide 56 reflected on the inner surface of the gripping claw 24 can be observed. Light may scatter and interfere with observation. Therefore, in the case of the metal gripping claws 24, for example, a black oxidation treatment or a black matte coating is applied to absorb light. It goes without saying that other means may be used depending on the material of the gripping claws 24.
なお、先端金具６の中心部には鉗子口６０が開
設され、その後方に鉗子ガイドチユーブ６２を接
続されている。これにより、挿入部先端中央に各
種の鉗子（図示せず）を突出させることができ
る。例えば、把持爪２４によつて大形な胆道内結
石等を把持した状態で、鉗子口６０から針付鉗子
を突出させて、その結石を破砕する。破砕後は、
標準形、ワニ口形又ははさみ形等の鉗子によつて
結石回収が行なえる。後に洗浄等を行なうことも
できる。 Note that a forceps port 60 is formed in the center of the tip metal fitting 6, and a forceps guide tube 62 is connected to the rear thereof. Thereby, various forceps (not shown) can be made to protrude from the center of the tip of the insertion portion. For example, with the grasping claws 24 grasping a large stone in the biliary tract, needle forceps are made to protrude from the forceps opening 60 to crush the stone. After crushing,
Stones can be retrieved using standard, alligator-shaped, or scissor-shaped forceps. Cleaning etc. can also be performed afterwards.
以上のように、本発明に係る内視鏡によれば、
挿入部先端の前方に把持爪を開閉操作可能に設け
たので、従来のものでは回収、破砕できなかつた
大きな患部、例えば胆道内の結石等の異物でも、
これを把持し、回収又は破砕することができ、内
視鏡による処置範囲を拡大することが可能とな
る。
As described above, according to the endoscope according to the present invention,
A grasping claw is provided in front of the tip of the insertion tube so that it can be opened and closed, so it can be used to remove foreign objects such as stones in the biliary tract, such as large lesions that could not be recovered or crushed with conventional tools.
This can be grasped and recovered or crushed, making it possible to expand the treatment range with the endoscope.
本発明では、挿入部先端金具に段部を形成し、
段部の凹部に把持爪の支軸を配置すると共に、段
部の凸部に観察光学系を配置し、把持爪の支軸と
観察光学系とを並列配置したので先端金具の部分
の長さを短くできる。 In the present invention, a stepped portion is formed on the insertion portion tip fitting,
The supporting shaft of the gripping claw is arranged in the concave part of the step, and the observation optical system is arranged in the convex part of the step, and the supporting shaft of the grasping claw and the observation optical system are arranged in parallel, so that the length of the tip metal part can be reduced. can be shortened.
また、本発明は、把持爪、支軸及び軸受が一つ
のユニツトとして構成されているので、観察光学
系のレンズ組込みや把持爪の作動調整終了後にユ
ニツト部分を先端金具に組立てることが出来、後
の再調整を要しない確実な組立が容易かつ迅速に
行える。 Further, in the present invention, since the gripping claw, the support shaft, and the bearing are configured as one unit, the unit part can be assembled to the tip fitting after the lens of the observation optical system is assembled and the operation adjustment of the gripping claw is completed. Reliable assembly that does not require readjustment can be performed easily and quickly.
更に、本発明は、鉗子孔が一対の支軸の軸心間
中央に位置するように配置されているので把持爪
で保持された対象物は鉗子孔の出口に臨んで位置
するようになり、対象物の破砕等が容易に行える
利点がある。 Further, in the present invention, the forceps hole is arranged so as to be located in the center between the axes of the pair of support shafts, so that the object held by the gripping claws is positioned facing the exit of the forceps hole. There is an advantage that the object can be easily crushed.
図面は本発明に係る内視鏡の一実施例を示すも
ので、第１図は一部断面にした正面図、第２図は
一部断面にした底面図、第３図は外形全体を示す
底面図、第４図は第２図の−線断面図、第５
図は把持爪の閉状態における作用説明図、第６図
は開状態における作用説明図、第７図は閉状態に
おける作用説明図で第５図の底面図、第８図は第
６図の左側面図、第９図は屈曲作用説明図、第１
０図は把持作用の説明図、第１１図並びに第１２
図は、ユニツト構造の組立状態を示す説明図であ
る。
２……挿入部、６……先端金具、２４……把持
爪、２６……支軸、４２……操作ワイヤ、５０…
…対物レンズ。
The drawings show an embodiment of the endoscope according to the present invention, in which Fig. 1 is a front view partially cut away, Fig. 2 is a bottom view partially cut away, and Fig. 3 shows the entire external shape. The bottom view, Figure 4 is a sectional view taken along the - line in Figure 2, and Figure 5 is a cross-sectional view taken along the line -
The figure is an explanatory diagram of the action in the closed state of the gripping claw, Figure 6 is an explanatory diagram of the action in the open state, Figure 7 is an explanatory diagram of the action in the closed state, and is a bottom view of Figure 5. Figure 8 is the left side of Figure 6. Top view, Figure 9 is an explanatory diagram of bending action, 1st
Figure 0 is an explanatory diagram of the gripping action, Figures 11 and 12
The figure is an explanatory view showing the assembled state of the unit structure. 2... Insertion section, 6... Tip metal fitting, 24... Gripping claw, 26... Support shaft, 42... Operating wire, 50...
...Objective lens.
Claims (1)
金具とを有し、挿入部先端の先端金具に一対の把
持爪を設け、この各把持爪は、挿入部中心から外
周側に離れた位置に設けた一対の支軸を介して
夫々先端金具より前方の突出した位置で互いに開
閉可能に設けられ、各把持爪は挿入部内に挿通し
た操作ワイヤの押引により開閉動作するようにし
た内視鏡に於いて、 前記先端金具の先端にはその軸心方向に沿つて
挿入部中心を挟んだ一方側が凸部であつて他方側
が凹部であるように段部が形成され、 この段部の凹部に前記一対の支軸が配置され、 前記段部の凸部に配置された観察光学系は、前
記挿入部先端の前記各把持爪の支軸の軸心間中心
位置で、且つ挿入部中心から外周側に偏位したあ
位置に配置され、 鉗子孔が前記一対の支軸の軸心間中心に位置す
るように配置されると共に、 前記把持爪は挿入部の先端金具の、段部の凹部
に嵌込む軸受に前記支軸を介して枢着され、この
把持爪、支軸及び軸受が一つのユニツトとして挿
入部先端に組込まれている、 ことを特徴とする内視鏡。 ２ 各把持爪の内面側には光の反射防止用コーテ
イングが施されている特許請求の範囲第１項記載
の内視鏡。[Scope of Claims] 1. The insertion section has a bendable bending section and an unbendable distal fitting, and the distal fitting at the distal end of the insertion section is provided with a pair of gripping claws, each of which grasps from the center of the insertion section. They are provided so that they can be opened and closed from each other at positions protruding forward from the tip fitting via a pair of support shafts installed at separate positions on the outer circumference, and each gripping claw can be opened and closed by pushing and pulling an operating wire inserted into the insertion section. In the endoscope, a stepped portion is formed at the distal end of the distal end fitting along the axial direction so that one side of the insertion portion center is a convex portion and the other side is a concave portion. , the pair of support shafts are disposed in the concave portion of the stepped portion, and the observation optical system disposed in the convex portion of the stepped portion is located at a center position between the axes of the support shafts of the respective gripping claws at the tip of the insertion portion. , and is arranged at a position offset from the center of the insertion section toward the outer periphery, and the forceps hole is arranged at the center between the axes of the pair of support shafts, and the gripping claw is located at the tip of the insertion section. The endoscope is pivotally connected via the support shaft to a bearing that fits into the recess of the stepped portion, and the grasping claw, the support shaft, and the bearing are incorporated into the distal end of the insertion portion as one unit. mirror. 2. The endoscope according to claim 1, wherein the inner surface of each gripping claw is coated to prevent light reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60264131A JPS62122649A (en) | 1985-11-25 | 1985-11-25 | Endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60264131A JPS62122649A (en) | 1985-11-25 | 1985-11-25 | Endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62122649A JPS62122649A (en) | 1987-06-03 |
| JPH0324217B2 true JPH0324217B2 (en) | 1991-04-02 |
Family
ID=17398890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60264131A Granted JPS62122649A (en) | 1985-11-25 | 1985-11-25 | Endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62122649A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0761359B2 (en) * | 1992-10-04 | 1995-07-05 | 重信 高根 | Toilet bowl |
| JP3657624B2 (en) * | 1993-06-17 | 2005-06-08 | テルモ株式会社 | Coelomic surgical instrument |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505877A (en) * | 1973-05-18 | 1975-01-22 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184801U (en) * | 1983-05-28 | 1984-12-08 | 富士写真光機株式会社 | Endoscope |
-
1985
- 1985-11-25 JP JP60264131A patent/JPS62122649A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505877A (en) * | 1973-05-18 | 1975-01-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62122649A (en) | 1987-06-03 |
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