JP2005296150A - Distal end part of electronic endoscope - Google Patents

Distal end part of electronic endoscope Download PDF

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JP2005296150A
JP2005296150A JP2004113751A JP2004113751A JP2005296150A JP 2005296150 A JP2005296150 A JP 2005296150A JP 2004113751 A JP2004113751 A JP 2004113751A JP 2004113751 A JP2004113751 A JP 2004113751A JP 2005296150 A JP2005296150 A JP 2005296150A
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circuit board
distal end
electronic endoscope
signal
signal line
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JP4575698B2 (en
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Takashi Sawai
貴司 澤井
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Pentax Corp
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Pentax Corp
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  • Solid State Image Pick-Up Elements (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distal end part of an electronic endoscope which facilitates work of connecting a signal wire pulled out from a signal cable to a connecting terminal on a circuit board by soldering or the like without the leakage of current to adjacent connecting terminals if the size of the circuit board is reduced and is excellent in terms of preventing the breaking of the wires because of few sharp curves of the signal wire. <P>SOLUTION: In the distal end part of the electronic endoscope, a solid-state image sensor 7 and the circuit board 10 are embedded in the distal end of an insertion part 1, and a plurality of signal wires 16 pulled out of the distal end of the signal cable 15 inserted in the insertion part 1 in parallel with the axis line are connected to a plurality of connecting terminals 17 provided on the circuit board 10. A square-shaped signal wire joint 10a is provided on the circuit board 10 in the direction perpendicular to the axial direction of the distal end part of the insertion part 1, and the plurality of the connecting terminals 17 are evenly disposed on each of four sides of the signal wire joint 10a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は電子内視鏡の先端部に関する。   The present invention relates to a distal end portion of an electronic endoscope.

挿入部の先端に固体撮像素子を内蔵する電子内視鏡においては、固体撮像素子の駆動回路等を構成する電子部品が取り付けられた回路基板が固体撮像素子の後側に隣接して配置され、挿入部内に挿通配置された信号ケーブルの先端から引き出された複数の信号線が、回路基板に設けられた複数の接続端子に接続されている（例えば、特許文献１、２）。
特開２０００−１９９８６３ 特開平９−６４２７３ In an electronic endoscope that incorporates a solid-state image sensor at the tip of the insertion portion, a circuit board on which electronic components constituting a drive circuit of the solid-state image sensor are attached is arranged adjacent to the rear side of the solid-state image sensor, A plurality of signal lines drawn from the tip of the signal cable inserted and disposed in the insertion portion are connected to a plurality of connection terminals provided on the circuit board (for example, Patent Documents 1 and 2).
JP 2000-199863 A JP-A-9-64273

上述のような従来の電子内視鏡においては、平板状に形成された回路基板の表面と裏面の二つの面の各々に多数の接続端子が横一列に並んで形成されて、信号ケーブルの先端から引き出された複数の信号線が各接続端子に半田付け等により個別に接続固着されている。   In the conventional electronic endoscope as described above, a large number of connection terminals are formed in a horizontal row on each of the two surfaces of the circuit board formed in a flat plate shape, and the tip of the signal cable A plurality of signal lines led out from are individually connected and fixed to each connection terminal by soldering or the like.

しかし、技術の進歩等により固体撮像素子が小型化されるのに伴って回路基板が小型化されると、隣り合う接続端子間の間隔が接近してしまうため、接続端子への信号線の半田付け作業において隣の接続端子とのリークを避けるのが作業上非常に難しくなってきた。   However, if the circuit board is miniaturized as the solid-state imaging device is miniaturized due to technological advancement or the like, the distance between adjacent connection terminals approaches, so the solder of the signal line to the connection terminal It has become extremely difficult to avoid leakage with the adjacent connection terminal during the attaching operation.

また、挿入部先端の短縮化を図るために、例えば図４に示されるように回路基板９１を電子内視鏡の挿入部先端の軸線方向に対して垂直の向きに配置した場合には、信号線９２が回路基板９１の上下二箇所に並んで配置されていると、信号ケーブル９３から急な角度で引き出される信号線９２が多くなって信号線９２の断線の原因になる場合がある。   Further, in order to shorten the tip of the insertion portion, for example, as shown in FIG. 4, when the circuit board 91 is arranged in a direction perpendicular to the axial direction of the insertion portion tip of the electronic endoscope, If the lines 92 are arranged side by side at two locations above and below the circuit board 91, the number of signal lines 92 drawn out from the signal cable 93 at a steep angle may increase, and the signal lines 92 may be disconnected.

そこで本発明は、回路基板が小型化されても、信号ケーブルから引き出された信号線を回路基板の接続端子に半田付け等により接続する際に、隣の接続端子とリークしないように容易に接続作業を行うことができ、しかも信号線の急な曲がりが少なくて断線防止の点でも優れている電子内視鏡の先端部を提供することを目的とする。   Therefore, even if the circuit board is miniaturized, when connecting the signal line drawn from the signal cable to the connection terminal of the circuit board by soldering or the like, it is easily connected so as not to leak with the adjacent connection terminal. An object of the present invention is to provide a distal end portion of an electronic endoscope that can perform work and that is excellent in terms of prevention of disconnection due to less sudden bending of signal lines.

上記の目的を達成するため、本発明の電子内視鏡の先端部は、挿入部の先端に固体撮像素子と回路基板とが内蔵されて、挿入部内に軸線と平行方向に挿通配置された信号ケーブルの先端から引き出された複数の信号線が、回路基板に設けられた複数の接続端子に接続された電子内視鏡の先端部において、回路基板に、略正方形状の信号線接続部を挿入部の先端部分の軸線方向に対して垂直をなす向きに設け、複数の接続端子を信号線接続部の四つの各辺部分に均等に配置したものである。   In order to achieve the above object, the distal end portion of the electronic endoscope of the present invention has a signal in which a solid-state imaging device and a circuit board are built in the distal end of the insertion portion, and are inserted into the insertion portion in a direction parallel to the axis. At the tip of the electronic endoscope where multiple signal wires drawn from the cable tip are connected to multiple connection terminals provided on the circuit board, a substantially square signal line connection is inserted into the circuit board. A plurality of connection terminals are equally arranged on each of the four side portions of the signal line connection portion.

なお、信号線接続部が、信号ケーブル側に向かって回路基板から立体的に突出する凸状に形成されていて、その突出部の側面に接続端子が配置されていてもよい。   The signal line connecting portion may be formed in a convex shape that protrudes three-dimensionally from the circuit board toward the signal cable side, and the connection terminal may be disposed on the side surface of the protruding portion.

本発明によれば、接続端子が信号線接続部の四つの各辺部分に均等に分散配置されて隣り合う接続端子の間の間隔が確保されるので、回路基板が小型化されても、信号ケーブルから引き出された信号線を回路基板の接続端子に半田付け等により接続する際に、隣の接続端子とリークしないように容易に接続作業を行うことができ、信号線の急な曲がりが少なくて断線防止にも寄与する。   According to the present invention, since the connection terminals are evenly distributed and arranged on each of the four side portions of the signal line connection portion to ensure the space between the adjacent connection terminals, the signal can be obtained even if the circuit board is downsized. When connecting the signal line drawn from the cable to the connection terminal of the circuit board by soldering etc., it can be easily connected so that it does not leak with the adjacent connection terminal, and there is little sudden bending of the signal line This also helps prevent disconnection.

挿入部の先端に固体撮像素子と回路基板とが内蔵されて、挿入部内に軸線と平行方向に挿通配置された信号ケーブルの先端から引き出された複数の信号線が、回路基板に設けられた複数の接続端子に接続された電子内視鏡の先端部において、回路基板に、略正方形状の信号線接続部を挿入部の先端部分の軸線方向に対して垂直をなす向きに設け、複数の接続端子を信号線接続部の四つの各辺部分に均等に配置した。   A plurality of signal lines provided on the circuit board, each including a solid-state imaging device and a circuit board at the distal end of the insertion portion, and a plurality of signal lines drawn from the distal end of the signal cable inserted and disposed in the insertion portion in a direction parallel to the axis. At the distal end portion of the electronic endoscope connected to the connection terminal, a substantially square signal line connection portion is provided on the circuit board in a direction perpendicular to the axial direction of the distal end portion of the insertion portion, and a plurality of connections The terminals were evenly arranged on each of the four sides of the signal line connecting portion.

図面を参照して本発明の実施例を説明する。
図２は電子内視鏡の挿入部の先端部分を示しており、細長い可撓管状に形成された挿入部１の最先端部分に先端部本体２が連結され、その先端部本体２の最先端面に観察窓３と照明窓４等が配置されている。５は、照明窓４の後方に配置されているライトガイドファイババンドルである。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows a distal end portion of an insertion portion of an electronic endoscope. A distal end portion body 2 is connected to the distal end portion of the insertion portion 1 formed in an elongated flexible tube, and the distal end portion 2 of the distal end portion body 2 is connected. The observation window 3 and the illumination window 4 are arranged on the surface. A light guide fiber bundle 5 is arranged behind the illumination window 4.

観察窓３の奥の先端部本体２内には、対物光学系６が配置されていて、その対物光学系６による被写体の投影位置に、例えばＣＣＤ（電荷結合素子）等からなる固体撮像素子７の受光面７ａが配置されている。   An objective optical system 6 is disposed in the distal end main body 2 at the back of the observation window 3, and a solid-state imaging device 7 made of, for example, a CCD (Charge Coupled Device) or the like is projected onto the subject projection position by the objective optical system 6. The light receiving surface 7a is arranged.

この実施例においては、対物光学系６の光軸と先端部本体２の軸線とが平行になるようにレイアウトされていて、固体撮像素子７の受光面７ａは対物光学系６の光軸に対して垂直の向きに配置されている。   In this embodiment, the optical axis of the objective optical system 6 and the axis of the tip body 2 are laid out in parallel, and the light receiving surface 7a of the solid-state image sensor 7 is in relation to the optical axis of the objective optical system 6. Are arranged in a vertical orientation.

そのような対物光学系６と固体撮像素子７を保持する撮像部保持枠８は、先端部本体２に軸線と平行方向に形成された貫通孔内に嵌挿固定されていて、撮像部保持枠８内には、固体撮像素子７の駆動回路等を構成する電子部品が取り付けられた回路基板１０が、固体撮像素子７の後側に隣接して収容されている。１１は、固体撮像素子７から後方に延出して回路基板１０側に接続されたリード。１２は、リード１１の中間部分の外面に沿って配置された絶縁板である。   The imaging unit holding frame 8 that holds the objective optical system 6 and the solid-state imaging element 7 is fitted and fixed in a through hole formed in the distal end portion main body 2 in a direction parallel to the axis, and the imaging unit holding frame. In 8, a circuit board 10 on which electronic components constituting a drive circuit of the solid-state image sensor 7 and the like are attached is accommodated adjacent to the rear side of the solid-state image sensor 7. A lead 11 extends rearward from the solid-state imaging device 7 and is connected to the circuit board 10 side. Reference numeral 12 denotes an insulating plate disposed along the outer surface of the intermediate portion of the lead 11.

１５は、固体撮像素子７で撮像された内視鏡観察画像の撮像信号等を伝送するために挿入部１内に軸線と平行方向に全長にわたって挿通配置された信号ケーブルであり、その先端から前方に延出する複数の信号線１６が、回路基板１０の接続端子１７に半田付け等によって接続されている。   Reference numeral 15 denotes a signal cable that is inserted through the entire length of the insertion portion 1 in the direction parallel to the axis in order to transmit an imaging signal of an endoscopic observation image captured by the solid-state imaging device 7 and forward from the distal end thereof. A plurality of signal lines 16 extending to the circuit board 10 are connected to the connection terminals 17 of the circuit board 10 by soldering or the like.

回路基板１０は、例えば積層セラミック等によって立体的な形状に形成されていて、その後端部分に、斜め後方から見た状態の斜視図である図１にも示されるように、信号線接続部１０ａが信号ケーブル１５側に向かって回路基板１０から立体的に突出する凸状に形成されている。   The circuit board 10 is formed into a three-dimensional shape by using, for example, a laminated ceramic, and the signal line connecting portion 10a is formed at the rear end portion of the circuit board 10 as shown in FIG. Is formed in a convex shape protruding three-dimensionally from the circuit board 10 toward the signal cable 15 side.

そのような回路基板１０の信号線接続部１０ａは、図２におけるIII−III断面図を図示する図３にも示されるように、先端部本体２の軸線方向に対して垂直をなす向きに略正方形をなす断面形状に形成されていて、その四つの各辺の側面部分に複数の接続端子１７が均等に配置されている。   The signal line connecting portion 10a of such a circuit board 10 is substantially oriented in a direction perpendicular to the axial direction of the distal end portion main body 2 as shown in FIG. 3 illustrating a sectional view taken along line III-III in FIG. It is formed in a cross-sectional shape that forms a square, and a plurality of connection terminals 17 are evenly arranged on the side surfaces of the four sides.

そして、各信号線１６中の導線１６′が各々接続端子１７に半田付け等によって接続固定されており、略正方形に形成された信号線接続部１０ａの四つの各辺部分に均一に分散して接続端子１７が配置されているので、回路基板１０が小型化されても、隣り合う接続端子１７の間の隙間を十分に確保して、隣の接続端子１７とリークしないように容易に接続作業を行うことができる。   The conductive wires 16 'in each signal line 16 are connected and fixed to the connection terminals 17 by soldering or the like, and are uniformly distributed on each of the four sides of the signal line connection portion 10a formed in a substantially square shape. Since the connection terminals 17 are arranged, even if the circuit board 10 is downsized, the connection work can be easily performed so as to ensure a sufficient gap between the adjacent connection terminals 17 so as not to leak with the adjacent connection terminals 17. It can be performed.

また、信号ケーブル１５から接続端子１７に向かって引き出される信号線１６を急に曲げる必要がないので、信号線１６の断線の発生も抑制される。   Further, since it is not necessary to suddenly bend the signal line 16 drawn out from the signal cable 15 toward the connection terminal 17, occurrence of disconnection of the signal line 16 is also suppressed.

本発明の実施例の電子内視鏡の先端部の信号線接続部の斜視図である。It is a perspective view of the signal line connection part of the front-end | tip part of the electronic endoscope of the Example of this invention. 本発明の実施例の電子内視鏡の先端部の側面断面図である。It is side surface sectional drawing of the front-end | tip part of the electronic endoscope of the Example of this invention. 本発明の実施例の電子内視鏡の先端部の図２におけるIII−III断面図である。FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 of the distal end portion of the electronic endoscope of the embodiment of the present invention. 従来の電子内視鏡の先端部の信号線接続部の側面図である。It is a side view of the signal line connection part of the front-end | tip part of the conventional electronic endoscope.

符号の説明Explanation of symbols

１ 挿入部
２ 先端部本体
７ 固体撮像素子
１０ 回路基板
１０ａ 信号線接続部
１５ 信号ケーブル
１６ 信号線
１６′ 導線
１７ 接続端子 DESCRIPTION OF SYMBOLS 1 Insertion part 2 Front-end | tip part body 7 Solid-state image sensor 10 Circuit board 10a Signal line connection part 15 Signal cable 16 Signal line 16 'Conducting wire 17 Connection terminal

Claims (2)

挿入部の先端に固体撮像素子と回路基板とが内蔵されて、上記挿入部内に軸線と平行方向に挿通配置された信号ケーブルの先端から引き出された複数の信号線が、上記回路基板に設けられた複数の接続端子に接続された電子内視鏡の先端部において、
上記回路基板に、略正方形状の信号線接続部を上記挿入部の先端部分の軸線方向に対して垂直をなす向きに設け、上記複数の接続端子を上記信号線接続部の四つの各辺部分に均等に配置したことを特徴とする電子内視鏡の先端部。 A solid-state imaging device and a circuit board are built in the distal end of the insertion portion, and a plurality of signal lines led out from the distal end of a signal cable inserted in the insertion portion in a direction parallel to the axis are provided on the circuit board. At the tip of the electronic endoscope connected to a plurality of connection terminals,
The circuit board is provided with a substantially square-shaped signal line connection portion in a direction perpendicular to the axial direction of the distal end portion of the insertion portion, and the plurality of connection terminals are provided on each of the four side portions of the signal line connection portion. A distal end portion of an electronic endoscope, characterized by being evenly arranged. 上記信号線接続部が、上記信号ケーブル側に向かって上記回路基板から立体的に突出する凸状に形成されていて、その突出部の側面に上記接続端子が配置されている請求項１記載の電子内視鏡の先端部。 2. The signal line connecting portion according to claim 1, wherein the signal line connecting portion is formed in a convex shape protruding three-dimensionally from the circuit board toward the signal cable side, and the connection terminal is disposed on a side surface of the protruding portion. The tip of an electronic endoscope.
JP2004113751A 2004-04-08 2004-04-08 The tip of the electronic endoscope Expired - Fee Related JP4575698B2 (en)

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JP5926955B2 (en) * 2011-12-28 2016-05-25 オリンパス株式会社 Imaging mechanism and endoscope apparatus
JP2018152482A (en) * 2017-03-14 2018-09-27 オムロン株式会社 Cable disengagement prevention structure
WO2021149177A1 (en) 2020-01-22 2021-07-29 オリンパス株式会社 Imaging device, endoscope, and method for manufacturing imaging device

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JPS63158304U (en) * 1987-04-07 1988-10-17
JPH05115436A (en) * 1991-10-25 1993-05-14 Olympus Optical Co Ltd Solid-state image pickup device
JPH06178757A (en) * 1992-12-10 1994-06-28 Olympus Optical Co Ltd Electronic endoscope
JPH08146310A (en) * 1994-11-18 1996-06-07 Olympus Optical Co Ltd Solid-state image pickup device
JPH0961731A (en) * 1995-08-30 1997-03-07 Olympus Optical Co Ltd Image pickup unit
JPH10248803A (en) * 1997-03-10 1998-09-22 Olympus Optical Co Ltd Image pick-up device
JP2001046325A (en) * 1999-08-09 2001-02-20 Olympus Optical Co Ltd Electronic endoscope

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
JPS63158304U (en) * 1987-04-07 1988-10-17
JPH05115436A (en) * 1991-10-25 1993-05-14 Olympus Optical Co Ltd Solid-state image pickup device
JPH06178757A (en) * 1992-12-10 1994-06-28 Olympus Optical Co Ltd Electronic endoscope
JPH08146310A (en) * 1994-11-18 1996-06-07 Olympus Optical Co Ltd Solid-state image pickup device
JPH0961731A (en) * 1995-08-30 1997-03-07 Olympus Optical Co Ltd Image pickup unit
JPH10248803A (en) * 1997-03-10 1998-09-22 Olympus Optical Co Ltd Image pick-up device
JP2001046325A (en) * 1999-08-09 2001-02-20 Olympus Optical Co Ltd Electronic endoscope

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