JP3513844B2 - Airtight structure of the operation unit of the endoscope - Google Patents
Airtight structure of the operation unit of the endoscopeInfo
- Publication number
- JP3513844B2 JP3513844B2 JP24451795A JP24451795A JP3513844B2 JP 3513844 B2 JP3513844 B2 JP 3513844B2 JP 24451795 A JP24451795 A JP 24451795A JP 24451795 A JP24451795 A JP 24451795A JP 3513844 B2 JP3513844 B2 JP 3513844B2
- Authority
- JP
- Japan
- Prior art keywords
- ring
- opening
- operation unit
- endoscope
- airtight structure
- 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 - Fee Related
Links
Landscapes
- Endoscopes (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は内視鏡手元操作部の
気密構造に係り、特に内視鏡手元操作部の本体ケースに
形成された開口部にＯリングを介して挿通配置されたコ
ネクタ部材の気密構造に関する。
【０００２】
【従来の技術】内視鏡手元操作部には、吸引用のコネク
タ管（コネクタ部材）が手元操作部の本体ケースに形成
された開口部にＯリングを介して気密状態で挿通配置さ
れている。このコネクタ管はチューブを介して吸引装置
に接続され、手元操作部の吸引ボタンの操作により、先
端部から吸引を行う。
【０００３】
【発明が解決しようとする課題】しかしながら、前記コ
ネクタ管は吸引バルブにろう付けで溶接されているため
寸法精度が高くなく、これによりコネクタ管が本体ケー
スの開口部に偏心した状態で配置される場合がある。こ
のような場合、前記Ｏリングは円周上で締め代が変わっ
てしまうため、締め代の小さい個所で気密不良を起こす
という欠点がある。
【０００４】このような不具合を防止するために、予め
締め代の大きいＯリングを使用すると、Ｏリングが開口
部に挿入し難くなり、また無理に挿入しようとするとＯ
リングの変形による反力がコネクタ管のろう付け部分に
伝達してろう付け部分が破損するという虞がある。ま
た、Ｏリングの硬度を低くしてＯリングの前記反力を低
減し、ろう付け部分の破損を防止しようとすると、コネ
クタ管が開口部に対してガタつき易いので、コネクタ管
に外力が加わった際に生じるコネクタ管のガタで前記ろ
う付け部分に悪影響を与えるという欠点がある。
【０００５】本発明はこのような事情に鑑みてなされた
もので、Ｏリングの挿入が容易でコネクタ部材の溶接部
に悪影響を与えない内視鏡手元操作部の気密構造を提供
することを目的とする。
【０００６】
【課題を解決するための手段】本発明は、前記目的を達
成するために、内視鏡手元操作部の本体ケースに形成さ
れた開口部にＯリングを介してコネクタ部材が挿通配置
された内視鏡手元操作部の気密構造に於いて、前記Ｏリ
ングは硬度の異なる少なくとも二種類のＯリングを使用
し、硬度の高いＯリングは前記開口部との締め代を小さ
く形成して開口部に対するコネクタ部材の位置決め用と
して使用し、硬度の低いＯリングは前記開口部との締め
代を前記硬度の大きいＯリングよりも大きく形成して開
口部に対するコネクタ部材の気密用として使用するよう
にしたことを特徴としている。
【０００７】本発明によれば、硬度の高いＯリングは開
口部との締め代が小さく形成されているので開口部に容
易に挿入することができ、また、硬度の低いＯリングは
開口部との締め代が大きく形成されているが軟らかいの
で開口部に容易に挿入することができる。そして、開口
部に挿通配置されたコネクタ部材に外力が加わると、位
置決め用として使用されている前記硬度の高いＯリング
でコネクタ部材のガタを抑えることができ、また、開口
部との気密性は、前記硬度の低いＯリングで保持するこ
とができる。
【０００８】
【発明の実施の形態】以下添付図面に従って本発明に係
る内視鏡手元操作部の気密構造の好ましい実施の形態に
ついて詳述する。図１は、本発明に係る内視鏡手元操作
部の気密構造が適用された内視鏡手元操作部１０の外観
を示す斜視図である。同図に示す内視鏡手元操作部１０
の本体ケース１２の上部には、フリーズスイッチ１４と
吸引バルブ１６とが並設され、また、本体ケース１２の
後端部には接眼部の中継基板部１８が設けられている。
符号２０は鉗子孔であり、符号２２はライトガイドケー
ブル等が収納された連結チューブ、符号２４はアングル
レバーである。
【０００９】一方、本体ケース１２の側面は図２に示す
ように開口部２６が形成され、この開口部２６にパッキ
ン２８を介して蓋３０が気密状態で取り付けられてい
る。前記蓋３０の表面には円筒状の突出部３２が形成さ
れ、この突出部３２の貫通孔３４に吸引用のコネクタ管
３６が後述する３枚のＯリング３８、４０、４２を介し
て気密状態で挿入配置されている。
【００１０】図１において前記コネクタ管３６の基端部
３６Ａは本体ケース１２の外部に突出配置され、チュー
ブ４４を介して図示しない吸引装置に接続される。図２
においてコネクタ管３６の先端部３６Ｂは、本体ケース
１２内に位置する前記吸引バルブ１６の下端部４６にろ
う付けで溶接接合される。ところで、前記Ｏリング３８
〜４２は、硬度の異なる二種類のＯリングが使用されて
いる。貫通孔３４の外側端部に位置するＯリング３８
は、コネクタ管３６に外力が加わってもコネクタ管３６
にガタを生じさせないように硬度が高く、且つ貫通孔３
４に容易に挿入できるように貫通孔３４との締め代が小
さく形成されている。
【００１１】前記Ｏリング４０、４２は、前記Ｏリング
３８よりも硬度が低く、且つコネクタ管３６が貫通孔３
４に偏心した状態で挿入された際にも気密性を保持でき
るように貫通孔３４との締め代が前記Ｏリング３８より
も大きく形成されている。このように構成されたコネク
タ管３６のＯリング３８〜４２による気密構造によれ
ば、硬度の高いＯリング３８は貫通孔３４との締め代が
小さく形成されているので貫通孔３４に容易に挿入する
ことができ、また、硬度の低いＯリング４０、４２は貫
通孔３４との締め代が大きく形成されているが軟らかい
ので貫通孔３４に容易に挿入することができる。
【００１２】そして、貫通孔３４に挿通配置されたコネ
クタ管３６に外力が加わっても、コネクタ管３６は前記
硬度の高いＯリング３８で貫通孔３４に位置決めされて
ガタが抑えられているので、コネクタ管３６のろう付け
溶接部に悪影響を与えない。また、貫通孔３４にコネク
タ管３６が偏心して挿入された場合でも、前記硬度の低
いＯリング４０、４２でその気密性を保持することがで
きる。
【００１３】従って、前記気密構造によれば、Ｏリング
３８〜４０の挿入が容易になり、また、コネクタ管３６
に外力が加わってもコネクタ管３６の溶接部に悪影響を
与えない。本発明の実施の形態では、吸引用のコネクタ
管３６における気密構造について説明したが、これに限
られるものではなく、本体ケース１２に形成された開口
部に挿通配置される他のコネクタ部材についても適用す
ることができる。
【００１４】また、本発明では、硬度の低いＯリング４
０、４２を２個使用したが１個でもよい。
【００１５】
【発明の効果】以上説明したように本発明に係る内視鏡
手元操作部の気密構造によれば、硬度の異なる少なくと
も二種類のＯリングを使用し、硬度の高いＯリングを締
め代を小さく形成して開口部に対するコネクタ部材の位
置決め用として使用し、硬度の低いＯリングを締め代を
大きく形成して開口部に対するコネクタ部材の気密用と
して使用するようにしたので、Ｏリングの挿入が容易に
なり、また、コネクタ部材に外力が加わってもコネクタ
部材の溶接部に悪影響を与えない。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an airtight structure of an endoscope hand operation unit, and in particular, to an opening formed in a main body case of the endoscope hand operation unit. The present invention relates to an airtight structure of a connector member inserted and arranged via a ring. 2. Description of the Related Art A connector tube (connector member) for suction is inserted through an O-ring through an O-ring in an airtight state in an endoscope hand operation unit. Have been. The connector tube is connected to a suction device via a tube, and suction is performed from a distal end portion by operating a suction button of a hand operation unit. However, since the connector tube is welded to the suction valve by brazing, the dimensional accuracy is not high, so that the connector tube is eccentric to the opening of the main body case. May be placed. In such a case, the interference of the O-ring changes on the circumference, so that there is a drawback that poor airtightness occurs at a portion where the interference is small. In order to prevent such a problem, if an O-ring having a large interference is used in advance, it becomes difficult to insert the O-ring into the opening.
The reaction force due to the deformation of the ring may be transmitted to the brazing portion of the connector tube, and the brazing portion may be damaged. Also, if the hardness of the O-ring is reduced to reduce the reaction force of the O-ring and prevent the breakage of the brazed portion, the connector tube is likely to rattle against the opening, so that an external force is applied to the connector tube. However, there is a disadvantage that the backlash of the connector tube generated at the time of the occurrence adversely affects the brazed portion. SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide an airtight structure of an endoscope hand-operating portion that can easily insert an O-ring and does not adversely affect a welded portion of a connector member. And According to the present invention, in order to achieve the above object, a connector member is inserted through an O-ring into an opening formed in a main body case of an endoscope hand operation unit. In the airtight structure of the endoscope hand operation unit, the O-ring uses at least two types of O-rings having different hardness, and the O-ring having high hardness is formed with a small interference with the opening. The O-ring having a low hardness is used for positioning the connector member with respect to the opening, and the interference between the O-ring and the opening is formed larger than the O-ring having the high hardness, so that the O-ring is used for hermetic sealing of the connector member with respect to the opening. It is characterized by having. According to the present invention, the O-ring having a high hardness has a small interference with the opening, so that the O-ring can be easily inserted into the opening. Has a large interference, but is soft and can be easily inserted into the opening. When an external force is applied to the connector member inserted and arranged in the opening, play of the connector member can be suppressed by the high hardness O-ring used for positioning, and airtightness with the opening can be reduced. , Can be held by the O-ring having a low hardness. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an airtight structure of an endoscope hand-held operation section according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an appearance of an endoscope hand operation unit 10 to which an airtight structure of an endoscope hand operation unit according to the present invention is applied. Endoscope hand operation unit 10 shown in FIG.
A freeze switch 14 and a suction valve 16 are juxtaposed on the upper part of the main body case 12, and a relay board part 18 of an eyepiece is provided at a rear end of the main body case 12.
Reference numeral 20 denotes a forceps hole, reference numeral 22 denotes a connection tube in which a light guide cable or the like is stored, and reference numeral 24 denotes an angle lever. On the other hand, an opening 26 is formed in the side surface of the main body case 12 as shown in FIG. 2, and a lid 30 is attached to the opening 26 via a packing 28 in an airtight state. A cylindrical projection 32 is formed on the surface of the lid 30, and a suction connector tube 36 is provided in a through hole 34 of the projection 32 through three O-rings 38, 40, 42 described later in an airtight state. Inserted and arranged. In FIG. 1, a base end portion 36A of the connector tube 36 is arranged so as to protrude outside the main body case 12, and is connected to a suction device (not shown) via a tube 44. FIG.
5, the distal end portion 36B of the connector tube 36 is welded to the lower end portion 46 of the suction valve 16 located in the main body case 12 by brazing. By the way, the O-ring 38
Nos. To 42 use two types of O-rings having different hardnesses. O-ring 38 located at the outer end of through hole 34
Indicates that the connector tube 36 can be connected even when an external force is applied to the connector tube 36.
The hardness is high so as not to cause backlash and the through holes 3
4, the interference with the through hole 34 is formed small. The O-rings 40 and 42 have a lower hardness than the O-ring 38 and the connector tube 36
The interference with the through-hole 34 is formed larger than that of the O-ring 38 so that airtightness can be maintained even when the O-ring 38 is inserted in an eccentric state. According to the airtight structure of the O-rings 38 to 42 of the connector tube 36 configured as described above, the O-ring 38 having high hardness is easily formed into the through-hole 34 because the interference between the O-ring 38 and the through-hole 34 is small. The O-rings 40 and 42 having a low hardness have a large interference with the through-hole 34 but are soft, so that they can be easily inserted into the through-hole 34. Further, even if an external force is applied to the connector tube 36 inserted and arranged in the through hole 34, the connector tube 36 is positioned in the through hole 34 by the O-ring 38 having high hardness, and the play is suppressed. It does not adversely affect the brazed weld of the connector tube 36. Further, even when the connector tube 36 is eccentrically inserted into the through hole 34, the O-rings 40 and 42 having low hardness can maintain the airtightness. Therefore, according to the airtight structure, the O-rings 38 to 40 can be easily inserted, and the connector tube 36 can be easily inserted.
Does not adversely affect the welded portion of the connector tube 36 even if an external force is applied to the connector tube 36. In the embodiment of the present invention, the airtight structure in the suction connector tube 36 has been described. However, the present invention is not limited to this, and other connector members inserted and arranged in the opening formed in the main body case 12 are also applicable. Can be applied. In the present invention, the O-ring 4 having a low hardness is used.
Although two 0s and 42s are used, one may be used. As described above, according to the airtight structure of the endoscope hand-operated portion according to the present invention, at least two types of O-rings having different hardnesses are used, and the O-rings having a high hardness are tightened. The O-ring has a small margin and is used for positioning the connector member with respect to the opening, and an O-ring having a low hardness is formed with a large tightening margin to be used for airtightness of the connector member with respect to the opening. Insertion becomes easy, and even if external force is applied to the connector member, it does not adversely affect the welded portion of the connector member.
【図面の簡単な説明】
【図１】本発明の内視鏡手元操作部の気密構造が適用さ
れた手元操作部の斜視図
【図２】内視鏡手元操作部の気密構造の要部断面図
【符号の説明】
１０…内視鏡手元操作部
１２…本体ケース
１６…吸引バルブ
３０…蓋
３４…貫通孔
３６…コネクタ管
３８…硬度の高いＯリング
４０、４２…硬度の低いＯリングBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hand operation unit to which an airtight structure of an endoscope hand operation unit of the present invention is applied. FIG. 2 is a cross-sectional view of a main part of an airtight structure of an endoscope hand operation unit. DESCRIPTION OF SYMBOLS 10: Endoscope hand operation unit 12: Main body case 16: Suction valve 30: Lid 34: Through hole 36: Connector tube 38: O-rings 40, 42 with high hardness O-rings with low hardness
フロントページの続き (56)参考文献 特開 平３−277341（ＪＰ，Ａ) 特開 平５−111455（ＪＰ，Ａ) 特開 平７−47050（ＪＰ，Ａ) 特開 平４−89041（ＪＰ，Ａ) 特開 平５−317244（ＪＰ，Ａ) 特表 平10−507105（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) A61B 1/00 - 1/32 Continuation of the front page (56) References JP-A-3-277341 (JP, A) JP-A-5-111455 (JP, A) JP-A-7-47050 (JP, A) JP-A-4-89041 (JP) , A) JP-A-5-317244 (JP, A) JP-A-10-507105 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) A61B 1/00-1/32
Claims (1)
た開口部にＯリングを介してコネクタ部材が挿通配置さ
れた内視鏡手元操作部の気密構造に於いて、 前記Ｏリングは硬度の異なる少なくとも二種類のＯリン
グを使用し、硬度の高いＯリングは前記開口部との締め
代を小さく形成して開口部に対するコネクタ部材の位置
決め用として使用し、硬度の低いＯリングは前記開口部
との締め代を前記硬度の大きいＯリングよりも大きく形
成して開口部に対するコネクタ部材の気密用として使用
するようにしたことを特徴とする内視鏡手元操作部の気
密構造。(57) [Claims 1] The airtightness of the endoscope hand-operating part in which a connector member is inserted through an opening formed in the main body case of the endoscope hand-operating part via an O-ring. In the structure, the O-ring uses at least two kinds of O-rings having different hardnesses, and the O-ring having a high hardness forms a small interference with the opening and is used for positioning the connector member with respect to the opening. An endoscope wherein the O-ring having a low hardness is formed so that the interference between the O-ring and the opening is larger than that of the O-ring having a high hardness, so that the connector member can be used for hermetically sealing the opening. Airtight structure of the operation unit at hand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24451795A JP3513844B2 (en) | 1995-09-22 | 1995-09-22 | Airtight structure of the operation unit of the endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24451795A JP3513844B2 (en) | 1995-09-22 | 1995-09-22 | Airtight structure of the operation unit of the endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0984739A JPH0984739A (en) | 1997-03-31 |
| JP3513844B2 true JP3513844B2 (en) | 2004-03-31 |
Family
ID=17119865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24451795A Expired - Fee Related JP3513844B2 (en) | 1995-09-22 | 1995-09-22 | Airtight structure of the operation unit of the endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3513844B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5666027B2 (en) * | 2014-01-17 | 2015-02-04 | 富士フイルム株式会社 | Endoscope duct switching device and ultrasonic endoscope |
| CN107072502A (en) * | 2015-06-29 | 2017-08-18 | 奥林巴斯株式会社 | Endoscope |
-
1995
- 1995-09-22 JP JP24451795A patent/JP3513844B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0984739A (en) | 1997-03-31 |
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