JPH0455081A - Multipoint welding method for laser welding - Google Patents
Multipoint welding method for laser weldingInfo
- Publication number
- JPH0455081A JPH0455081A JP2167925A JP16792590A JPH0455081A JP H0455081 A JPH0455081 A JP H0455081A JP 2167925 A JP2167925 A JP 2167925A JP 16792590 A JP16792590 A JP 16792590A JP H0455081 A JPH0455081 A JP H0455081A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- welding
- small
- hole
- diameter
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 23
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- Surgical Instruments (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、レーザ溶接における多点溶接方法に係り、特
に１時計、カメラ、内視鏡等に使用される小径ピンを溶
着固定するためのレーザ溶接における多点溶接方法に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multi-point welding method in laser welding, and particularly to a method for welding and fixing small diameter pins used in watches, cameras, endoscopes, etc. This invention relates to a multi-point welding method in laser welding.
［従来の技術］
時計、力、メラ、内視鏡等に使用される小径ピンの固定
は、対象が小さくかつ高精度を要求されるためにレーザ
光を用いた多点溶接により一固着する＋段が採用されて
いる。かかるレーザ光を用いたレーザ溶接により小径ピ
ンを被固定部に対して固定する従来技術を、第４図〜第
６図に例示する内視鏡ｌを用いて説明する。[Prior art] Small-diameter pins used in watches, wristwatches, cameras, endoscopes, etc. are fixed by multi-point welding using laser light because the objects are small and require high precision. steps are used. A conventional technique for fixing a small diameter pin to a fixed part by laser welding using such a laser beam will be explained using an endoscope 1 illustrated in FIGS. 4 to 6.
まず、第４図、第５図を用いて鉗子装Ｎ２を装備した内
視鏡１の構成について説明する。内視鏡ｌは、挿通自在
の可撓性管３と、鉗子装Ｎ２及び鉗子装置２を遠隔操作
するための操作部４等により構成されている。鉗子装置
２は、第５図にて示すごとく一対の鉗子カップ５．５等
により構成されており、鉗子７カツプ５．５はリンク機
構部６、可撓性管３内に貫挿された操作ワイヤ７を介し
て操作部４と接続構成されている。一対の鉗子カップ５
，５は、操作部４を介して操作ワイヤ７を進退操作する
ことにより、開閉自在の構成となっている。鉗子５．５
は、ピン８を介して開閉自在に連結されるとともに、リ
ンク機構部６を構成するリンク部材９，９．連結ピンｌ
Ｏを介して操作ワイヤ７の先端部に設けられたワイヤ継
手１１に連結支持されている。なお、１２で示めす部材
は先端ヘッド、１３で示す部材は、先端ヘッド１２に設
けられたすり割開ロカバーで、このすり割開ロカバー１
３内にリンク機構部６．ワイヤ継手１１が挿入されてい
る。First, the configuration of the endoscope 1 equipped with the forceps device N2 will be described using FIGS. 4 and 5. The endoscope 1 is composed of a flexible tube 3 that can be inserted freely, and an operation section 4 for remotely controlling the forceps device N2 and the forceps device 2. The forceps device 2 is composed of a pair of forceps cups 5.5, etc., as shown in FIG. It is configured to be connected to the operating section 4 via a wire 7. A pair of forceps cups 5
, 5 can be opened and closed by moving the operating wire 7 forward and backward through the operating section 4. forceps 5.5
are connected via pins 8 so as to be openable and closable, and link members 9, 9 . Connecting pin l
It is connected and supported via O to a wire joint 11 provided at the tip of the operating wire 7. The member indicated by 12 is the tip head, and the member indicated by 13 is the slotted opening cover provided on the tip head 12.
3 has a link mechanism section 6. A wire joint 11 is inserted.
一対の鉗子カップ５．５とリンク部材９，９との連結は
、ピン１４を介して行なわれている。ピン１４は、第６
図にて示すごとくその一端部はレーザ光を用いたレーザ
溶接にて鉗子カップ５に固着されており、ピン１４の他
端部は皿状の大径部１４ａに形設されてリンク部材９が
抜出るのを防止しうるように設定されている。ピン１４
は。The pair of forceps cups 5.5 and the link members 9, 9 are connected via pins 14. Pin 14 is the sixth
As shown in the figure, one end of the pin 14 is fixed to the forceps cup 5 by laser welding using a laser beam, and the other end of the pin 14 is formed into a dish-shaped large diameter portion 14a, and the link member 9 is formed into a large diameter portion 14a. It is designed to prevent it from coming out. pin 14
teeth.
外径寸法が０．４−腸、全長１ｍｍに設定されており、
ピン挿通用の孔として鉗子カップ５．リンク部材９に貫
設された孔１５．１６に挿入しうるように設定しである
。番孔１５．１６の孔径は、ピン１４の外径寸法より０
．０１〜０．０１ｍｍ程度大きく設定してあり、孔１６
におけるピン１４の皿状大径部１４ａと対応する部分に
は皿状のザグリ１７が形設しである。The outer diameter is set to 0.4-inch and the total length is 1mm.
Forceps cup as a hole for pin insertion 5. It is configured to be inserted into a hole 15, 16 provided through the link member 9. The hole diameter of the numbered holes 15 and 16 is 0 from the outer diameter of the pin 14.
．． It is set approximately 0.01 to 0.01 mm larger, and the hole 16
A dish-shaped counterbore 17 is formed in a portion corresponding to the dish-shaped large diameter portion 14a of the pin 14.
次に、小径のピン１４をレーザ光を用いて鉗子カップ５
にレーザ溶接する方法について説明する。まず、鉗子カ
ップ５とリンク部材９とを重ね合せ、ザグリ１７部側か
らピン１４を挿入する。Next, the small diameter pin 14 is inserted into the forceps cup 5 using a laser beam.
This section explains how to perform laser welding. First, the forceps cup 5 and the link member 9 are placed one on top of the other, and the pin 14 is inserted from the counterbore 17 side.
次に、ピン１４の一端部側（皿状大径部１４ａと反対側
）の周辺にレーザ光を照射し、ピン１４と鉗子力７プ５
とを溶着固定させる。レーザ溶接は、第７図（ａ）にて
示すように多点溶接とする。Next, a laser beam is irradiated around one end side of the pin 14 (the side opposite to the dish-shaped large diameter portion 14a), and the pin 14 and the forceps force 7 force 5 are irradiated.
and are welded and fixed. Laser welding is multi-point welding as shown in FIG. 7(a).
上記レーザ溶接により、鉗子カップ５とリンク部材９と
はピン１４を介して互に回動自在に連結されるものであ
る。By the laser welding described above, the forceps cup 5 and the link member 9 are rotatably connected to each other via the pin 14.
［発明が解決しようとする問題点１
しかしながら、上記従来技術においては次のような問題
点があった。即ち、第７図（ａ）にて示すごとく４点溶
接を行なうものとし、溶接順序をＡ、Ｂ、Ｃ，Ｄの順序
にて行なうものとすると。[Problem 1 to be Solved by the Invention However, the above-mentioned prior art has the following problems. That is, assume that four-point welding is performed as shown in FIG. 7(a), and the welding order is A, B, C, and D.
第１番目のＡ部の溶着操作の際に、ピン１４のＡ部は鉗
子カー、プ５方向に引き寄せられて溶着されることにな
る。即ち、ピン１４の溶着部Ａは、第７図（ａ）、（ｂ
）にて示すごとく鉗子カップ５と接合した状態で溶着さ
れ、溶着部Ａと反対側（次工程の溶着部Ｂ側）はピン１
４と孔１５との間の直径方向の総間隙量分だけ開くこと
になり、ピン１４は第７図（ｂ）に示すごとく傾きを生
ずる。以下。During the first welding operation of the A section, the A section of the pin 14 is drawn toward the forceps curve 5 and welded. That is, the welded part A of the pin 14 is as shown in FIGS.
), the pin 1 is welded in a state where it is connected to the forceps cup 5, and the side opposite to the welded part A (the welded part B side in the next process) is
4 and the hole 15 in the diametrical direction, and the pin 14 tilts as shown in FIG. 7(b). below.
Ｂ、Ｃ，Ｄ部をレーザ溶接しても、ピン１４がＡ部の溶
着の際に傾いてしまっているので、ピン１４の軸心と孔
１５．１６との同心度がとれず、ピン１４＠状大径部１
４＆と孔１６のザグリ１７部とが不自然な形で係接し、
リンク部材９の自由な回動が防げられるという問題があ
った。また。Even if parts B, C, and D are laser welded, since the pin 14 is tilted during welding of part A, concentricity between the axis of the pin 14 and the hole 15.16 cannot be maintained, and the pin 14 @-shaped large diameter part 1
4& and counterbore 17 of hole 16 engage in an unnatural manner,
There was a problem in that free rotation of the link member 9 was prevented. Also.
Ｂ部の溶着部においては、直径方向の間隙の総量性だけ
開口するので、溶着を行なっても溶着強度が小さく、ピ
ン１４と鉗子カップ５との溶着強度が必要以下になり、
品質の低下、信頼性の低下をもたらしていた。In the welded part of part B, since the opening is the same as the total gap in the diametrical direction, the welding strength is small even if welding is performed, and the welding strength between the pin 14 and the forceps cup 5 becomes less than necessary.
This resulted in a decline in quality and reliability.
本発明は、上記従来技術の問題点に鑑みなされたもので
あって、小径ピンをレーザ光による多点溶接により被固
定物に溶着する場合に、ピンの傾きを生じさせることな
く溶着しうるちのとし１品質の向上、信頼性の向上を図
ることを目的とする。The present invention has been made in view of the problems of the prior art described above, and is a method of welding small diameter pins to an object to be fixed by multi-point welding using laser light without causing the pins to tilt. The purpose is to improve quality and reliability.
ｃ問題点を解決するための手段】
本発明は、第１図にて示すごとく、本体２０に立設され
た小径ピン２１に孔２２を有する被固定部材２３を介し
て嵌着し、次に、小径ピン２１の端面軸心部にレーザ光
２４を照射して小径ピン２１の端部の外径寸法を均一に
拡大させて小径ピンの端部外周と孔２２どの間の間隙を
なくシ、最後に、小径ピン２１の端部外周部をレーザ光
にて数個所多点溶接するものである。c. Means for Solving the Problems] As shown in FIG. , irradiating the axial center of the end surface of the small diameter pin 21 with a laser beam 24 to uniformly expand the outer diameter dimension of the end of the small diameter pin 21 to eliminate the gap between the outer periphery of the end of the small diameter pin and the hole 22; Finally, the outer periphery of the end of the small diameter pin 21 is welded at several points using laser light.
［作 用］
上記方法によれば、孔２２内に挿入された小径ピン２１
の端部が軸心部に照射されるレーザ光２４によりまず半
径方向に均一に拡大され、これにより孔２２と小径ピン
２１との間隙がなくなる０次に、小径ピン２１の端部外
周部に照射されるレーザ光により、小径ピン２１と被固
定部材２３とがレーザ光が照射された部分だけ溶着され
る。[Function] According to the above method, the small diameter pin 21 inserted into the hole 22
The end of the hole 22 is uniformly expanded in the radial direction by the laser beam 24 irradiated onto the shaft center, thereby eliminating the gap between the hole 22 and the small diameter pin 21. Next, the outer circumference of the end of the small diameter pin 21 is expanded. The irradiated laser beam welds the small diameter pin 21 and the member to be fixed 23 together only in the portion irradiated with the laser beam.
［実 施 例］
第２図は、本発明に係るレーザ溶接における多点溶接方
法を実施するための第１の実施例を示すものであり、図
は内視鏡おける鉗子５とリンク部材９との連結部の構成
を示している。鉗子５とリンク部材９との構成について
は、前記第７図にて示したものと同様であるので、同一
部材には同一符号を付してその説明を省略する。[Example] Fig. 2 shows a first example for implementing the multi-point welding method in laser welding according to the present invention, and the figure shows a forceps 5 and a link member 9 in an endoscope. The configuration of the connecting part is shown. The configurations of the forceps 5 and the link member 9 are the same as those shown in FIG. 7, so the same members are given the same reference numerals and the explanation thereof will be omitted.
次に、鉗子カップ５とリンク部材９とを連結する小径ピ
ン（例えば、直径０．４腸■程度）をレーザ光を用いて
溶着する方法について説明する。Next, a method of welding a small diameter pin (for example, about 0.4 mm in diameter) connecting the forceps cup 5 and the link member 9 using a laser beam will be described.
第１工程
まず、リンク部材９をザグリ１７部が下になるようにし
、下方からピン１４を挿入する。この際、ピン１４とリ
ンク部材９の互の皿状形設部１４ａ、１７が適合するよ
うに挿入するのは勿論である０次に鉗子カップ５を、孔
１５がピン１４に嵌合するように上から重ね合わせ、鉗
子カー、ブ５とリンク部材９とをピン１４を介して互に
連結状態にする。なを、鉗子カップ５とリンク部材９と
を互のピン挿入用孔１５．１６が一致するように重ね合
せ、連結ピン１４を挿入させてもよいことは勿論である
。この状態でレーザ加工機にセットされているＸ−Ｙテ
ーブル３０上に固定する。First step: First, the link member 9 is placed so that the counterbore 17 is at the bottom, and the pin 14 is inserted from below. At this time, it is of course necessary to insert the pin 14 and the plate-shaped portions 14a and 17 of the link member 9 so that they fit together. are superimposed from above, and the forceps curve 5 and link member 9 are connected to each other via the pin 14. Of course, the forceps cup 5 and the link member 9 may be overlapped so that their pin insertion holes 15 and 16 are aligned, and the connecting pin 14 may be inserted. In this state, it is fixed on an XY table 30 set in a laser processing machine.
ｘ−Ｙテーブル３０は、図示を省略しているＮ／Ｃ装置
によりＸ−Ｙ方向に自動制御しうるように設定されてい
る。The x-y table 30 is set so that it can be automatically controlled in the x-y directions by an unillustrated N/C device.
第２工程
次に、レーザ加工機からレーザ光を照射して多点溶接を
行なうのであるが、まず、レーザ光の照射点を第２図（
ａ）のＡ点、即ち小径ピン１４の軸心位置にセットし、
このＡ点にレーザ光の照射を行なう、レーザ光は、ピン
１４、鉗子カップ５の材質、大きさ等に適合させてＹＡ
Ｇレーザ。Second process Next, multi-point welding is performed by irradiating laser light from a laser processing machine. First, the irradiation points of the laser beam are
Set it at point A in a), that is, the axial center position of the small diameter pin 14,
This point A is irradiated with laser light.
G laser.
ＣＯ２レーザ等を適宜用いる。また、レーザ光の強さは
、ピン１４の直径、ピン１４と孔１５との間の間隙量等
に応じて設定する。照射時間は数秒程度でよい。A CO2 laser or the like is used as appropriate. Further, the intensity of the laser beam is set depending on the diameter of the pin 14, the amount of gap between the pin 14 and the hole 15, and the like. The irradiation time may be about several seconds.
第３工程 次に、ピン１４と孔１５との接合部周辺にＢ。Third step Next, place B around the joint between pin 14 and hole 15.
Ｃ，Ｄ、Ｈに示す順序にてレーザ光をスポット的に照射
し、ピン１４の端部と鉗子カップ５とを多点溶着する。Laser light is irradiated spot-wise in the order shown in C, D, and H to weld the ends of the pins 14 and the forceps cup 5 at multiple points.
なお、図においては、Ｂ、Ｃ，Ｄ。In addition, in the figure, B, C, and D.
Ｅの４ケ所を溶着する場合について例示したが。The case where four locations E are welded is shown as an example.
これに限定されるものではなく、必要とされる溶接強度
に対応させて増減しうるちのである。It is not limited to this, and can be increased or decreased depending on the required welding strength.
上記方法による作用について説明する。ピン１４の端面
軸心部にレーザ光を照射すると、ピン１４の端面部は均
一に半径方向に、即ち直径寸法が拡大する方向に変形せ
しめられ、この変形によりピン１４における溶接部外周
と鉗子カップ５における孔１５との間の間隙がなくなる
。ピン１４の端面部の外径は、その軸心部に照射される
レーザ光により均一に拡大されるので、径拡大部具外の
ピン１４外周と孔１５内周との間の間隙は一定に保持さ
れ、従って、ピン１４と孔１５とは同心状態となる。こ
の状態で、ピン１４と孔１５との接合部をＢ、Ｃ，Ｄ、
Ｈの順序でスポット的に溶接するので、ピン１４と孔１
５との同心度がとれた状態で溶着される。The effect of the above method will be explained. When the axial center of the end face of the pin 14 is irradiated with a laser beam, the end face of the pin 14 is uniformly deformed in the radial direction, that is, in the direction in which the diameter increases, and this deformation causes the outer periphery of the welded portion of the pin 14 and the forceps cup to 5 and the hole 15 is eliminated. Since the outer diameter of the end surface of the pin 14 is uniformly expanded by the laser beam irradiated to its axial center, the gap between the outer periphery of the pin 14 outside the diameter enlarger and the inner periphery of the hole 15 is constant. The pin 14 and the hole 15 are held concentrically. In this state, connect the pin 14 and hole 15 to B, C, D,
Since we will spot weld in the order of H, pin 14 and hole 1
It is welded with concentricity with 5.
従って、本実施例による方法によれば、小径ピン１４が
傾いたりラジアル方向（半径方向）にずれを生じたりす
ることなく溶若しうるちのであり、その結果、リンク部
材９のスムーズな作動を確保しうるちのである。又、ピ
ン１４の溶接部の外径寸法を予め均一に拡大させて溶接
するので。Therefore, according to the method according to this embodiment, the small diameter pin 14 can be melted without being tilted or displaced in the radial direction, and as a result, the link member 9 can operate smoothly. It is guaranteed to be safe. Furthermore, the outer diameter of the welded portion of the pin 14 is uniformly expanded in advance before welding.
各溶接部Ｂ、Ｃ，Ｄ、Ｅの溶着強度を均一な所定強度に
設定することができる。これらのことから、製品として
の品質の向上、信頼性の向上を大幅に図ることができる
ものである。The welding strength of each welding part B, C, D, and E can be set to a uniform predetermined strength. For these reasons, it is possible to significantly improve the quality and reliability of the product.
第２実施例
第３図に、本発明に係る方法を適用する第２の実施例を
示す、第３図は、第５図にて示した内視鏡における鉗子
カップ５周辺の構成と同様の構成を示すものであり、第
５図の平断面状態を示すものである。Second Embodiment FIG. 3 shows a second embodiment to which the method according to the present invention is applied. This shows the configuration, and shows the planar cross-sectional state of FIG. 5.
本実施例は、第１実施例にて説明したレーザ光による多
点溶接方法を鉗子カップ５とカバー１３との連結ピン８
及びリンク部材９とワイヤ継手１１との連結ピン１０と
に適用した例を示すものである。In this embodiment, the multi-point welding method using a laser beam explained in the first embodiment is applied to the connecting pin 8 of the forceps cup 5 and the cover 13.
An example in which the present invention is applied to a connecting pin 10 between a link member 9 and a wire joint 11 is shown.
上記各ピン８、ｌＯを溶着する工程及びその作用、効果
は前記第１実施例と同様であるので、その説明を省略す
る。The process of welding each of the pins 8 and 1O, and its operation and effect are the same as those of the first embodiment, so a description thereof will be omitted.
なお、上記各実施例においては、内視鏡の構成部品であ
る小径ピンの溶着方法について説明したが、これに限定
されるものではなく、時計やカメラその他に用いられる
小径ピンの溶着手段として適用しうるのは勿論である。In each of the above embodiments, a method for welding small-diameter pins that are components of an endoscope has been described, but the method is not limited to this, and can be applied as a means for welding small-diameter pins used in watches, cameras, and other devices. Of course it is possible.
［発明の効果］
以上のように、本発明によれば、製品の品質の向上、信
頼性の向上を図りうるものである。[Effects of the Invention] As described above, according to the present invention, it is possible to improve the quality and reliability of products.
第１図は本発明に係る方法を説明する図、第２図（ａ）
、（ｂ）は本発明に係る方法を適用する第１の実施例を
示す説明図、第３図は本発明に係る方法を適用する第２
の実施例を示す断面説明図、第４図、第５図、第６図及
び第７図は従来技術を説明するための図である。
５・・・鉗子カップ
９・・・リンク部材
１４・・・ピン
１５．１６−・・ピン嵌挿用孔
Ａ、Ｂ、Ｃ，Ｄ・・・レーザ光の照射部第
図
第
図
第
図
第
図
第
第
４ａ
１′／Figure 1 is a diagram explaining the method according to the present invention, Figure 2 (a)
, (b) is an explanatory diagram showing a first embodiment in which the method according to the present invention is applied, and FIG. 3 is an explanatory diagram showing a second embodiment in which the method according to the present invention is applied.
4, 5, 6, and 7 are diagrams for explaining the prior art. 5... Forceps cup 9... Link member 14... Pin 15, 16... Pin fitting insertion hole A, B, C, D... Laser light irradiation part Figure Figure Figure Figure Figure 4a 1'/
Claims (3)
記小径ピンにおける端部軸心部にレーザ光を照射して小
径ピンの溶着部の径を均一に拡大し、小径ピンの溶着部
外周と前記小径ピン嵌挿用孔との間の間隙をなくし、し
かる後に、小径ピンの所定外周溶接部にレーザ光を照射
して溶着することを特徴とするレーザ溶接における多点
溶接方法。(1) Insert a small-diameter pin into a hole provided on the side of the welded member, irradiate the axial center of the end of the small-diameter pin with laser light to uniformly expand the diameter of the welded part of the small-diameter pin, and A multi-point welding method in laser welding, characterized in that a gap between the outer periphery of the welded part and the small-diameter pin insertion hole is eliminated, and then a predetermined outer periphery welded part of the small-diameter pin is irradiated with laser light to weld. .
は、小径ピンの直径、小径ピンのと小径ピン嵌挿用孔と
の間の間隙の大小等に応じて照射条件が設定されること
を特徴とする特許請求の範囲第１項記載のレーザ溶接に
おける多点溶接方法。(2) Irradiation conditions for the laser beam irradiated onto the end axis of the small diameter pin are set according to the diameter of the small diameter pin, the size of the gap between the small diameter pin and the small diameter pin insertion hole, etc. A multi-point welding method in laser welding according to claim 1, characterized in that:
ザ光は、必要とされる溶接強度に対応してその照射数、
強さが設定されることを特徴とする特許請求の範囲第１
記載のレーザ溶接における多点溶接方法。(3) The number of laser beams irradiated to the predetermined outer circumferential welded portion of the small diameter pin is adjusted according to the required welding strength.
Claim 1 characterized in that strength is set.
Multi-point welding method in laser welding described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167925A JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167925A JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455081A true JPH0455081A (en) | 1992-02-21 |
| JPH0787994B2 JPH0787994B2 (en) | 1995-09-27 |
Family
ID=15858604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2167925A Expired - Fee Related JPH0787994B2 (en) | 1990-06-26 | 1990-06-26 | Multi-point welding method in laser welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787994B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767349B2 (en) | 2001-03-01 | 2004-07-27 | Pentax Corporation | Bipolar forceps for endoscopes |
-
1990
- 1990-06-26 JP JP2167925A patent/JPH0787994B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767349B2 (en) | 2001-03-01 | 2004-07-27 | Pentax Corporation | Bipolar forceps for endoscopes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0787994B2 (en) | 1995-09-27 |
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