JP3269226B2 - Endoscope focus adjustment device - Google Patents
Endoscope focus adjustment deviceInfo
- Publication number
- JP3269226B2 JP3269226B2 JP29556593A JP29556593A JP3269226B2 JP 3269226 B2 JP3269226 B2 JP 3269226B2 JP 29556593 A JP29556593 A JP 29556593A JP 29556593 A JP29556593 A JP 29556593A JP 3269226 B2 JP3269226 B2 JP 3269226B2
- Authority
- JP
- Japan
- Prior art keywords
- focus adjustment
- focus
- endoscope
- wire
- peripheral surface
- 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
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- Endoscopes (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は内視鏡のフォーカス調整
装置に係り、特に内視鏡挿入部の先端硬質部内に設けら
れたフォーカスレンズ鏡胴を前後移動させてフォーカス
調整を行う内視鏡のフォーカス調整装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a focus adjusting device for an endoscope, and more particularly to an endoscope for adjusting a focus by moving a focus lens barrel provided in a hard end portion of an endoscope insertion portion back and forth. A focus adjustment device.
【0002】[0002]
【従来の技術】従来、この種のフォーカス調整装置に
は、内視鏡手元操作部の接眼部の周囲に設けられたフォ
ーカスリングによってフォーカス受けを回動し、移動部
材、及び操作パイプを前後移動させ、この操作パイプに
固着されたフォーカス調整用ワイヤを押し引き操作する
ことにより、フォーカスレンズ鏡胴を前後移動させてフ
ォーカス調整を行うものがある(特開昭63−2691
13号公報)。2. Description of the Related Art Conventionally, this type of focus adjustment device includes a focus ring which is provided around an eyepiece of an endoscope hand operation unit to rotate a focus receiver to move a moving member and an operation pipe back and forth. In some cases, the focus is adjusted by moving the focus lens barrel back and forth by moving and moving a focus adjustment wire fixed to the operation pipe (JP-A-63-2691).
No. 13).
【0003】また、他のフォーカス調整装置には、手元
操作部に取り付けられたレバーを回動することにより、
牽引ワイヤを押し引き操作してフォーカス調整を行うも
のもある。[0003] In other focus adjustment devices, a lever attached to a hand operation unit is rotated to thereby rotate the lever.
In some cases, focus adjustment is performed by pushing and pulling a pulling wire.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、特開昭
63−269113号公報に開示されたフォーカス調整
装置は、フォーカスリングを接眼部の周囲に設けている
為、フォーカスリングが大きくなり、また、フォーカス
受け、移動部材、及び操作パイプも複雑な加工で形成さ
れているので、コストが高くなるという欠点がある。However, in the focus adjusting device disclosed in Japanese Patent Application Laid-Open No. 63-269113, the focus ring is provided around the eyepiece, so that the focus ring becomes large. Since the focus receiver, the moving member, and the operation pipe are also formed by complicated processing, there is a disadvantage that the cost is increased.
【0005】また、レバーでワイヤを操作するフォーカ
ス調整装置は、レバーの微小な回転角をもとに、フォー
カスレンズ鏡胴の僅かな移動量を制御しなければならな
いので、複雑なギヤ機構や、レバーをフリーストップに
する為にレバーに負荷を与える機構が必要になる。これ
により、前記フォーカス調整装置は、レバーのトルクが
重くなるので、操作性が悪いという欠点がある。Further, a focus adjusting device which operates a wire with a lever has to control a slight amount of movement of a focus lens barrel based on a minute rotation angle of the lever. In order to make the lever free stop, a mechanism for applying a load to the lever is required. As a result, the focus adjusting device has a disadvantage that the operability is poor because the lever torque is increased.
【0006】本発明はこのような事情に鑑みてなされた
もので、簡単な構造で、且つ操作性の良い内視鏡のフォ
ーカス調整装置を提供することを目的とする。The present invention has been made in view of such circumstances, and has as its object to provide an endoscope focus adjustment device having a simple structure and good operability.
【0007】[0007]
【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、内視鏡挿入部の先端硬質部内に光軸に沿
って前後移動可能に設けられたフォーカスレンズ鏡胴
を、内視鏡手元操作部から前記挿入部を介して挿通配置
されたフォーカス調整用ワイヤを操作することにより前
後移動させてフォーカス調整を行う内視鏡のフォーカス
調整装置に於いて、前記手元操作部のケーシングに穿設
された孔部に固着された筒状体と、前記筒状体の内周面
に外周面が螺合された筒状のフォーカス調整用ツマミ
と、前記ワイヤの基端部が固着され、前記フォーカス調
整用ツマミの内周面に外周面が螺合されると共に、前記
筒状体の軸方向に形成されたガイド孔にピン係合され、
フォーカス調整用ツマミを回動することにより前記ガイ
ド孔に沿って往復移動し、前記ワイヤを操作する牽引部
材と、から成ることを特徴としている。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a focusing lens barrel provided inside a hard end portion of an endoscope insertion portion so as to be movable back and forth along an optical axis. In a focus adjustment device of an endoscope for performing focus adjustment by operating a focus adjustment wire inserted and arranged from the endoscope hand operation unit through the insertion unit to perform forward / backward movement, a casing of the hand operation unit A cylindrical body fixed to a hole formed in the cylindrical body, a cylindrical focus adjustment knob having an outer peripheral surface screwed to an inner peripheral surface of the cylindrical body, and a base end of the wire fixed to the cylindrical body. An outer peripheral surface is screwed into an inner peripheral surface of the focus adjustment knob, and a pin is engaged with a guide hole formed in an axial direction of the cylindrical body,
A pulling member that reciprocates along the guide hole by rotating a focus adjustment knob and operates the wire.
【0008】[0008]
【作用】本発明によれば、フォーカス調整用ツマミを筒
状体に対して回動すると、該フォーカス調整用ツマミに
螺合された牽引部材が筒状体のガイド孔と該ガイド孔に
係合されたピンとの作用により、ガイド孔に沿って往復
移動する。これにより、牽引部材に固着されたフォーカ
ス調整用ワイヤが押し引き操作されてフォーカスレンズ
鏡胴が前後移動するので、フォーカス調整を行うことが
できる。According to the present invention, when the focus adjustment knob is rotated with respect to the cylindrical body, the traction member screwed to the focus adjustment knob engages with the guide hole of the cylindrical body and the guide hole. Reciprocating along the guide hole by the action of the pin. Accordingly, the focus adjustment wire fixed to the traction member is pushed and pulled to move the focus lens barrel back and forth, so that focus adjustment can be performed.
【0009】このように、本発明では筒状体、フォーカ
ス調整用ツマミ、及び牽引部材によってフォーカス調整
装置を構成したので、簡単な構造でフォーカス調整を行
うことができると共に、筒状体、フォーカス調整用ツマ
ミ、及び牽引部材に螺刻されたネジの作用によってフォ
ーカス調整用ワイヤを操作するようにしたので、操作性
が良くなる。As described above, according to the present invention, since the focus adjusting device is constituted by the tubular body, the focus adjusting knob, and the pulling member, the focus can be adjusted with a simple structure, and the tubular body, the focus adjuster can be adjusted. The operability is improved because the focus adjustment wire is operated by the action of the control knob and the screw threaded on the traction member.
【0010】[0010]
【実施例】以下添付図面に従って本発明に係る内視鏡の
フォーカス調整装置の好ましい実施例について詳説す
る。図1は、本発明に係る内視鏡のフォーカス調整装置
が適用された内視鏡の全体図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a focus adjusting device for an endoscope according to the present invention; FIG. 1 is an overall view of an endoscope to which a focus adjustment device for an endoscope according to the present invention is applied.
【0011】内視鏡の手元操作部ケーシング10には挿
入部12の基端部が接続され、この挿入部12の先端部
には湾曲部14を介して先端硬質部16が接続されてい
る。また、手元操作部ケーシング10には、ライトガイ
ド18が接続される。ライトガイド18の先端部は、該
ケーシング10から挿入部12、及び湾曲部14を介し
て先端硬質部16に挿通配置され、先端硬質部16の先
端部から患部等を照明する。更に、ケーシング10の後
端部には接眼部20が形成されている。A proximal end portion of an insertion portion 12 is connected to a hand operation portion casing 10 of the endoscope, and a distal end hard portion 16 is connected to a distal end portion of the insertion portion 12 via a curved portion 14. A light guide 18 is connected to the hand operation unit casing 10. The distal end of the light guide 18 is inserted from the casing 10 through the insertion portion 12 and the curved portion 14 to the distal hard portion 16, and illuminates the affected part from the distal end of the hard distal portion 16. Further, an eyepiece 20 is formed at the rear end of the casing 10.
【0012】前記ケーシング10の両側面には、左右ア
ングルツマミ22と上下アングルツマミ24が装着され
る。これらのアングルツマミ22、24には、ケーシン
グ10内に回動自在に配置された図示しないプーリが各
々連結されており、また、プーリには、先端部が湾曲部
14に固着された牽引ワイヤが各々巻回されている。従
って、アングルツマミ22、24を回動すると、牽引ワ
イヤがプーリによって牽引されるので、湾曲部14を所
望の方向に湾曲することができる。Left and right angle knobs 22 and up and down angle knobs 24 are mounted on both side surfaces of the casing 10. A pulley (not shown) rotatably arranged in the casing 10 is connected to each of the angle knobs 22 and 24. A pulling wire having a distal end fixed to the curved portion 14 is connected to the pulley. Each is wound. Therefore, when the angle knobs 22 and 24 are rotated, the pulling wire is pulled by the pulley, so that the bending portion 14 can be bent in a desired direction.
【0013】一方、フォーカス調整装置30がケーシン
グ10の基端部近傍に穿設された図2に示す孔部32に
設けられている。前記フォーカス調整装置30は図2、
図3に示すように、本体筒34、フォーカス調整用ツマ
ミ36、及び牽引筒38を主な構成としている。前記本
体筒34は、前記ケーシング10の孔部32に固着され
た筒状の支持部材40内に嵌入固着され、その内周部に
はネジ筒42が螺合されている。前記ネジ筒42は、セ
ットネジ44によって前記フォーカス調整用ツマミ36
と一体と成している。また、ネジ筒42の略中央部には
ストッパーピン46が固着され、このストッパーピン4
6はフォーカス調整用ツマミ36の回動によって本体筒
34の突片部48の両端部に当接することにより、フォ
ーカス調整用ツマミ36の回動範囲、即ち、操作範囲を
制限している。On the other hand, a focus adjusting device 30 is provided in a hole 32 shown in FIG. The focus adjustment device 30 is shown in FIG.
As shown in FIG. 3, a main body tube 34, a focus adjustment knob 36, and a traction tube 38 are main components. The main body tube 34 is fitted and fixed in a cylindrical support member 40 fixed to the hole 32 of the casing 10, and a screw tube 42 is screwed to an inner peripheral portion thereof. The screw cylinder 42 is fixed to the focus adjustment knob 36 by a set screw 44.
With one. A stopper pin 46 is fixed to a substantially central portion of the screw cylinder 42.
Reference numeral 6 restricts the rotation range of the focus adjustment knob 36, that is, the operation range, by abutting on both ends of the projecting piece 48 of the main body cylinder 34 by the rotation of the focus adjustment knob 36.
【0014】前記牽引筒38には、後述するフォーカス
調整用ワイヤ50の基端部50Aが金具52を介して固
着される。また、牽引筒38は、ネジ筒42の内周面に
螺合されると共に、本体筒34の軸方向に形成されたガ
イド孔54にピン56によって係合される。従って、牽
引筒38は、フォーカス調整用ツマミ36を回動する
と、ネジ筒42とのネジの作用、及びガイド孔54とピ
ン56との作用によってガイド孔54に沿って往復移動
するので、前記ワイヤ50を押し引き操作することがで
きる。A base end portion 50A of a later-described focus adjustment wire 50 is fixed to the pulling barrel 38 via a metal fitting 52. The traction tube 38 is screwed to the inner peripheral surface of the screw tube 42 and is engaged with a guide hole 54 formed in the axial direction of the main body tube 34 by a pin 56. Therefore, when the focus adjustment knob 36 is rotated, the pulling cylinder 38 reciprocates along the guide hole 54 by the action of the screw with the screw cylinder 42 and the action of the guide hole 54 and the pin 56. 50 can be pushed and pulled.
【0015】前記ワイヤ50は、牽引筒38からガイド
ブロック58、及び密着コイル60に保護されて挿入部
12内に挿通され、その先端部50Bが図4に示すよう
に、先端硬質部16内に設けられたフォーカスレンズ鏡
胴62にストッパ環64を介して取り付けられる。ま
た、ワイヤ50は、スプリング66の付勢力によって図
中左方向に付勢される。前記フォーカスレンズ鏡胴62
は、フォーカスレンズ68を保持し、ガイド孔70に沿
って光軸方向に前後移動自在に配置される。The wire 50 is inserted into the insertion portion 12 while being protected by the guide block 58 and the contact coil 60 from the pulling tube 38, and the distal end portion 50B is inserted into the distal end hard portion 16 as shown in FIG. It is attached to a provided focus lens barrel 62 via a stopper ring 64. Further, the wire 50 is urged leftward in the figure by the urging force of the spring 66. The focus lens barrel 62
Holds the focus lens 68 and is arranged to be movable back and forth in the optical axis direction along the guide hole 70.
【0016】従って、前記ワイヤ50を図中右方向に引
っ張ると、レンズ鏡胴62はスプリング66の付勢力に
抗して図中右方向移動し、ワイヤ50を図中左方向に押
し出すと、レンズ鏡胴62はスプリング66の付勢力に
よって図中左方向に移動する。これにより、対物レンズ
72から入射した観察像をイメージガイド74の結像面
76上に合焦させることができる。この観察像は、イメ
ージガイド74を介して図1に示した接眼部20に導か
れる。Accordingly, when the wire 50 is pulled rightward in the drawing, the lens barrel 62 moves rightward in the drawing against the urging force of the spring 66, and when the wire 50 is pushed leftward in the drawing, the lens The lens barrel 62 is moved leftward in the figure by the urging force of the spring 66. Thereby, the observation image incident from the objective lens 72 can be focused on the image forming surface 76 of the image guide 74. This observation image is guided to the eyepiece unit 20 shown in FIG.
【0017】次に前記の如く構成された内視鏡のフォー
カス調整装置の作用について説明する。接眼部20を介
して観察した観察像のピントが合っていない場合には、
フォーカス調整用ツマミ36を本体筒34に対して正転
/反転回動させる。これにより、フォーカス調整用ツマ
ミ36のネジ筒42に螺合された牽引筒38が、本体筒
34のガイド孔54と該ガイド孔54に係合されたピン
56との作用により、ガイド孔54に沿って往復移動す
る。従って、牽引筒38に固着されたワイヤ50が押し
引き操作されてフォーカスレンズ鏡胴62が前後移動す
るので、ピントを合わすことができる。Next, the operation of the focus adjusting device for an endoscope configured as described above will be described. If the observation image observed through the eyepiece 20 is out of focus,
The focus adjustment knob 36 is rotated forward / reversely with respect to the main body cylinder 34. As a result, the pulling barrel 38 screwed into the screw barrel 42 of the focus adjustment knob 36 is inserted into the guide hole 54 by the action of the guide hole 54 of the main body barrel 34 and the pin 56 engaged with the guide hole 54. Reciprocating along. Therefore, since the wire 50 fixed to the pulling barrel 38 is pushed and pulled to move the focus lens barrel 62 forward and backward, the focus can be adjusted.
【0018】このように、本実施例では、本体筒34、
フォーカス調整用ツマミ36、及び牽引筒38によって
フォーカス調整装置30を構成したので、従来の装置と
比較して簡単な構造でフォーカス調整を行うことができ
る。また、本実施例では、本体筒34、牽引筒38、及
びネジ筒42に螺刻されたネジの作用によってワイヤ5
0を操作するようにしたので、従来の装置と比較して操
作性が良くなる。As described above, in this embodiment, the main body tube 34,
Since the focus adjustment device 30 is constituted by the focus adjustment knob 36 and the traction tube 38, the focus adjustment can be performed with a simple structure as compared with a conventional device. Further, in this embodiment, the wire 5 is formed by the action of the screws threaded on the main body tube 34, the traction tube 38, and the screw tube 42.
Since 0 is operated, the operability is improved as compared with the conventional device.
【0019】更に、本実施例の装置では本体筒34、牽
引筒38、及びネジ筒42に螺刻されたネジのピッチを
小さくすることで、ワイヤ50の押し引き量を微妙に制
御できるので、ピント合わせを正確に行うことができ
る。Further, in the apparatus of the present embodiment, the amount of pushing and pulling of the wire 50 can be delicately controlled by reducing the pitch of the screws threaded in the main body tube 34, the traction tube 38, and the screw tube 42. Focusing can be performed accurately.
【0020】[0020]
【発明の効果】以上説明したように本発明に係る内視鏡
のフォーカス調整装置によれば、筒状体、フォーカス調
整用ツマミ、及び牽引部材によってフォーカス調整装置
を構成したので、簡単な構造でフォーカス調整を行うこ
とができると共に、筒状体、フォーカス調整用ツマミ、
及び牽引部材に形成されたネジの作用によってフォーカ
ス調整用ワイヤを操作するようにしたので、操作性が良
くなる。As described above, according to the focus adjusting device for an endoscope according to the present invention, since the focus adjusting device is constituted by the tubular body, the focus adjusting knob, and the pulling member, the focus adjusting device has a simple structure. Focus adjustment can be performed, and a cylindrical body, a knob for focus adjustment,
In addition, since the focus adjusting wire is operated by the action of the screw formed on the traction member, the operability is improved.
【図1】本発明に係る内視鏡のフォーカス調整装置が適
用された内視鏡の全体図FIG. 1 is an overall view of an endoscope to which a focus adjustment device for an endoscope according to the present invention is applied.
【図2】本発明に係る内視鏡のフォーカス調整装置の断
面図FIG. 2 is a sectional view of a focus adjusting device for an endoscope according to the present invention.
【図3】本発明に係る内視鏡のフォーカス調整装置の組
立斜視図FIG. 3 is an assembled perspective view of a focus adjusting device for an endoscope according to the present invention;
【図4】本発明に係る内視鏡のフォーカス調整装置に適
用された内視鏡先端硬質部の断面図FIG. 4 is a sectional view of an endoscope distal end hard portion applied to the endoscope focus adjusting device according to the present invention;
10…手元操作部ケーシング 30…フォーカス調整装置 34…本体筒 36…フォーカス調整用ツマミ 38…牽引筒 50…フォーカス調整用ワイヤ 62…フォーカスレンズ鏡胴 DESCRIPTION OF SYMBOLS 10 ... Hand operation part casing 30 ... Focus adjustment device 34 ... Main body cylinder 36 ... Focus adjustment knob 38 ... Towing cylinder 50 ... Focus adjustment wire 62 ... Focus lens barrel
Claims (1)
って前後移動可能に設けられたフォーカスレンズ鏡胴
を、内視鏡手元操作部から前記挿入部を介して挿通配置
されたフォーカス調整用ワイヤを操作することにより前
後移動させてフォーカス調整を行う内視鏡のフォーカス
調整装置に於いて、 前記手元操作部のケーシングに穿設された孔部に固着さ
れた筒状体と、 前記筒状体の内周面に外周面が螺合された筒状のフォー
カス調整用ツマミと、 前記ワイヤの基端部が固着され、前記フォーカス調整用
ツマミの内周面に外周面が螺合されると共に、前記筒状
体の軸方向に形成されたガイド孔にピン係合され、フォ
ーカス調整用ツマミを回動することにより前記ガイド孔
に沿って往復移動し、前記ワイヤを操作する牽引部材
と、 から成ることを特徴とする内視鏡のフォーカス調整装
置。1. A focusing lens barrel provided in a rigid distal end portion of an endoscope insertion portion so as to be movable back and forth along an optical axis from an endoscope hand operation portion through the insertion portion. In a focus adjustment device for an endoscope which performs focus adjustment by moving the focus adjustment wire back and forth by operating a focus adjustment wire, a tubular body fixed to a hole formed in a casing of the hand operation unit, A cylindrical focus adjustment knob having an outer peripheral surface screwed to an inner peripheral surface of the cylindrical body; and a base end portion of the wire fixed thereto, and an outer peripheral surface screwed to the inner peripheral surface of the focus adjustment knob. A pulling member that is engaged with a guide hole formed in the axial direction of the cylindrical body, reciprocates along the guide hole by rotating a focus adjustment knob, and operates the wire. And consisting of Focus adjustment device of the endoscope, wherein.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29556593A JP3269226B2 (en) | 1993-11-25 | 1993-11-25 | Endoscope focus adjustment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29556593A JP3269226B2 (en) | 1993-11-25 | 1993-11-25 | Endoscope focus adjustment device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07143958A JPH07143958A (en) | 1995-06-06 |
JP3269226B2 true JP3269226B2 (en) | 2002-03-25 |
Family
ID=17822292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29556593A Expired - Lifetime JP3269226B2 (en) | 1993-11-25 | 1993-11-25 | Endoscope focus adjustment device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3269226B2 (en) |
-
1993
- 1993-11-25 JP JP29556593A patent/JP3269226B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07143958A (en) | 1995-06-06 |
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