JP4555006B2 - The tip of the electronic endoscope - Google Patents

The tip of the electronic endoscope Download PDF

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JP4555006B2
JP4555006B2 JP2004195090A JP2004195090A JP4555006B2 JP 4555006 B2 JP4555006 B2 JP 4555006B2 JP 2004195090 A JP2004195090 A JP 2004195090A JP 2004195090 A JP2004195090 A JP 2004195090A JP 4555006 B2 JP4555006 B2 JP 4555006B2
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signal line
circuit board
distal end
electronic endoscope
fixing groove
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JP2006014906A (en
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知史 岩川
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Hoya Corp
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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信号線の先端部分が、その部分だけ可撓性被覆が剥がされて、回路基板に設けられた接続端子部に半田付け等によって接続されている（例えば、特許文献１）。
特開平１１−４７０８４ In an electronic endoscope incorporating 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, The tip of the signal line led out from the tip of the signal cable inserted and inserted in the insertion part is peeled off only at that part, and connected to the connection terminal part provided on the circuit board by soldering or the like. (For example, Patent Document 1).
JP 11-47084 A

上述のような従来の電子内視鏡においては、信号ケーブルの先端から引き出された信号線の先端部分を、その部分だけ可撓性被覆を剥がしてから、回路基板の接続端子部に当て付けた状態で半田付け接続しており、図６は、そのような信号線９１の導線９１ａが、回路基板９３に設けられている接続端子部９４に対して良好な状態に半田付け接続された状態を略示している。   In the conventional electronic endoscope as described above, the distal end portion of the signal line drawn from the distal end of the signal cable is applied to the connection terminal portion of the circuit board after peeling only the flexible coating portion. FIG. 6 shows a state in which the conductor 91a of the signal line 91 is soldered and connected to the connection terminal portion 94 provided on the circuit board 93 in a good state. Abbreviated.

しかし、技術の進歩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９３が小型化されると、半田付け作業の際に、接続端子部９４に対する信号線９１の僅かな位置ずれにより、例えば図７に略示されるように、導線９１ａが接続端子部９４から浮き上がった状態に半田付けされて、短期間で接続が外れてしまう等の接続不良が発生していた。   However, when the circuit board 93 is miniaturized as the solid-state imaging device is miniaturized due to the advancement of technology, a slight displacement of the signal line 91 with respect to the connection terminal portion 94 during the soldering operation causes For example, as schematically shown in FIG. 7, a connection failure such that the conductive wire 91 a is soldered in a state of being lifted from the connection terminal portion 94 and disconnected in a short period of time has occurred.

そこで本発明は、回路基板の接続端子部に対して信号線の先端部分を確実かつ容易に位置決めして半田付け等により接続することができる電子内視鏡の先端部を提供することを目的とする。   Accordingly, an object of the present invention is to provide a distal end portion of an electronic endoscope in which a distal end portion of a signal line can be reliably and easily positioned with respect to a connection terminal portion of a circuit board and can be connected by soldering or the like. To do.

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、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信号線の先端部分が、その部分だけ可撓性被覆が剥がされて、回路基板に設けられている接続端子部に接続された電子内視鏡の先端部において、回路基板に、信号線の可撓性被覆が弾性変形してきつく嵌め込まれる信号線固定溝を、接続端子部に隣接して設けたものである。   In order to achieve the above object, the distal end portion of the electronic endoscope of the present invention includes a solid-state imaging device and a circuit board built in the distal end of the insertion portion, and is pulled out from the distal end of the signal cable inserted and disposed in the insertion portion. At the tip of the electronic endoscope connected to the connection terminal provided on the circuit board, the tip of the signal line is peeled off only at that part, and the signal line is connected to the circuit board. A signal line fixing groove into which the flexible coating is elastically deformed and tightly fitted is provided adjacent to the connection terminal portion.

なお、信号線固定溝が、回路基板上に間隔をあけて並んで突設された複数の突起により形成されていてもよく、或いは、回路基板に形成された凹部により形成されていてもよい。   In addition, the signal line fixing groove may be formed by a plurality of protrusions protruding in parallel on the circuit board, or may be formed by a recess formed on the circuit board.

本発明によれば、信号ケーブルから引き出された信号線の先端部分が接続される接続端子部に隣接して、回路基板に、信号線の可撓性被覆が弾性変形してきつく嵌め込まれる信号線固定溝を設けたことにより、可撓性被覆を信号線固定溝に嵌め込み固定した状態で信号線を接続端子部に半田付け等によって接続する作業を行うことができるので、回路基板の接続端子部に対して信号線の先端部分を確実かつ容易に位置決めして半田付け等により接続することができ、さらに、半田付けされた後も信号線の自由な動きが制約されるので、半田付け部分に加わる剥離力等が低減されて、半田付け部分の耐久性が向上する。   According to the present invention, the signal line fixing in which the flexible coating of the signal line is elastically deformed and tightly fitted to the circuit board adjacent to the connection terminal part to which the tip part of the signal line drawn from the signal cable is connected. By providing the groove, it is possible to perform the work of connecting the signal line to the connection terminal part by soldering or the like in a state where the flexible coating is fitted and fixed in the signal line fixing groove. On the other hand, the tip of the signal line can be reliably and easily positioned and connected by soldering or the like, and further, the free movement of the signal line is restricted even after soldering. The peeling force and the like are reduced, and the durability of the soldered portion is improved.

挿入部の先端に固体撮像素子と回路基板とが内蔵され、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信号線の先端部分が、その部分だけ可撓性被覆が剥がされて、回路基板に設けられている接続端子部に接続された電子内視鏡の先端部において、回路基板に、信号線の可撓性被覆が弾性変形してきつく嵌め込まれる信号線固定溝を、接続端子部に隣接して設ける。   A solid-state imaging device and a circuit board are built in the distal end of the insertion portion, and the flexible coating is peeled off only at the distal end portion of the signal line drawn from the distal end of the signal cable inserted and arranged in the insertion portion, At the distal end portion of the electronic endoscope connected to the connection terminal portion provided on the circuit board, the signal line fixing groove into which the flexible coating of the signal line is elastically deformed and tightly fitted into the circuit board is provided on the connection terminal portion. It is provided adjacent to

図面を参照して本発明の実施例を説明する。
図５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. 5 shows the distal end portion of the insertion portion of the electronic endoscope. The 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 device 7 is fitted and fixed in a through-hole formed in the distal end 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の先端部分が、回路基板１０の後端付近に設けられた接続端子部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. The front end portions of the plurality of signal lines 16 extending to are connected to the connection terminal portions 17 provided near the rear end of the circuit board 10 by soldering or the like.

図１は、回路基板１０の接続端子部１７に信号線１６が接続される前の状態を略示しており、回路基板１０の表面には、接続端子部１７に接続される信号線１６の可撓性被覆１６ｂを挟むように、複数の突起１８が間隔をあけて信号線１６の接続方向に沿う方向に並列に並んで突出して設けられ、可撓性被覆１６ｂを挟むための信号線固定溝１９が、各々隣り合う突起１８間の隙間によって可撓性被覆１６ｂの直径より狭く形成されている。   FIG. 1 schematically shows a state before the signal line 16 is connected to the connection terminal portion 17 of the circuit board 10, and the signal line 16 connected to the connection terminal portion 17 is allowed on the surface of the circuit board 10. A plurality of protrusions 18 are provided so as to protrude in parallel in a direction along the connection direction of the signal line 16 so as to sandwich the flexible coating 16b, and a signal line fixing groove for sandwiching the flexible coating 16b 19 are formed narrower than the diameter of the flexible coating 16b by the gaps between the adjacent protrusions 18 respectively.

なお、この実施例においては、各突起１８が、接続端子部１７に信号線１６が接続されたときに可撓性被覆１６ｂを挟む位置だけでなく、それより前方の接続端子部１７の左右位置まで設けられている。 In this embodiment, each protrusion 18 is not only located at the position where the flexible coating 16b is sandwiched when the signal line 16 is connected to the connection terminal portion 17, but also at the left and right positions of the connection terminal portion 17 in front of it. until it has provided.

そのような接続端子部１７に接続される信号線１６は、先端部分だけ可撓性被覆１６ｂが剥がされて導電線１６ａが剥き出しにされ、可撓性被覆１６ｂを信号線固定溝１９に挟み込んだ状態で導電線１６ａを接続端子部１７に半田付け等によって接続する。   The signal wire 16 connected to such a connection terminal portion 17 has the flexible coating 16b peeled off only at the tip portion, and the conductive wire 16a is exposed, and the flexible coating 16b is sandwiched between the signal wire fixing grooves 19. In this state, the conductive wire 16a is connected to the connection terminal portion 17 by soldering or the like.

図２は、信号線１６の先端部分が半田付け２０により接続端子部１７に接続された状態を略示しており、そのように導電線１６ａが接続端子部１７に半田付けされる前の段階で、可撓性被覆１６ｂが信号線固定溝１９に挟み込まれる際には、図２におけるIII−III断面を図示する図３に示されるように、可撓性被覆１６ｂが両側の突起１８の間で潰されて弾性変形し、信号線固定溝１９にきつく嵌め込まれる。   FIG. 2 schematically shows a state in which the tip end portion of the signal line 16 is connected to the connection terminal portion 17 by soldering 20, and in such a stage before the conductive wire 16 a is soldered to the connection terminal portion 17. When the flexible coating 16b is sandwiched between the signal line fixing grooves 19, as shown in FIG. 3 illustrating the III-III cross section in FIG. It is crushed and elastically deformed, and is tightly fitted into the signal line fixing groove 19.

その結果、導電線１６ａを接続端子部１７に半田付けする作業の際には導電線１６ａが安定した状態に固定されているので、導電線１６ａを接続端子部１７に対して正しく位置決めした状態で半田付け作業を行うことができる。   As a result, since the conductive wire 16a is fixed in a stable state when the conductive wire 16a is soldered to the connection terminal portion 17, the conductive wire 16a is properly positioned with respect to the connection terminal portion 17. Soldering work can be performed.

このようにして、回路基板１０の接続端子部１７に対して信号線１６の導電線１６ａを確実かつ容易に位置決めして半田付け等により接続することができ、また、可撓性被覆１６ｂが信号線固定溝１９にきつく嵌め込まれていることにより、半田付けが行われた後も信号線１６の自由な動きが制約されるので、信号線１６の半田付け２０部分に加わる剥離力等が低減されて、半田付け２０部分の耐久性が向上する。   In this way, the conductive wire 16a of the signal line 16 can be reliably and easily positioned and connected to the connection terminal portion 17 of the circuit board 10 by soldering or the like. Since the free movement of the signal line 16 is restricted even after the soldering is performed by being tightly fitted in the wire fixing groove 19, the peeling force applied to the soldering 20 portion of the signal line 16 is reduced. Thus, the durability of the soldering 20 portion is improved.

なお、本発明は上記実施例に限定されるものではなく、例えば図４に示されるように、回路基板１０に形成した凹部等によって信号線固定溝１９を形成しても差し支えない。   The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 4, the signal line fixing groove 19 may be formed by a recess formed in the circuit board 10.

本発明の第１の実施例の電子内視鏡の先端部の信号線接続部の信号線接続前の状態の略示斜視図である。It is a schematic perspective view of the state before the signal line connection of the signal line connection portion at the distal end portion of the electronic endoscope of the first embodiment of the present invention. 本発明の第１の実施例の電子内視鏡の先端部の信号線接続部の信号線接続後の状態の略示斜視図である。It is a schematic perspective view of the state after the signal line connection of the signal line connection portion at the distal end portion of the electronic endoscope according to the first embodiment of the present invention. 本発明の第１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 sectional view taken along the line III-III in FIG. 2 of the distal end portion of the electronic endoscope according to the first embodiment of the present invention. 本発明の第２の実施例の電子内視鏡の先端部の断面図（第１の実施例の図３に相当する断面図）である。It is sectional drawing (sectional drawing equivalent to FIG. 3 of 1st Example) of the front-end | tip part of the electronic endoscope of 2nd 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. 従来の電子内視鏡の先端部の良好な信号線接続部の略示斜視図である。It is a schematic perspective view of a good signal line connecting portion at the tip of a conventional electronic endoscope. 従来の電子内視鏡の先端部の不良な信号線接続部の略示斜視図である。It is a schematic perspective view of a defective signal line connecting portion at the tip of a 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
１５ 信号ケーブル
１６ 信号線
１６ａ 導電線
１６ｂ 可撓性被覆
１７ 接続端子部
１８ 突起
１９ 信号線固定溝 DESCRIPTION OF SYMBOLS 1 Insertion part 2 Tip part main body 7 Solid-state image sensor 10 Circuit board 15 Signal cable 16 Signal line 16a Conductive line 16b Flexible coating | cover 17 Connection terminal part 18 Protrusion 19 Signal line fixing groove

Claims (3)

挿入部の先端に固体撮像素子と回路基板とが内蔵され、上記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信号線の可撓性被覆が先端部分だけ剥がされて上記可撓性被覆内の導電線が剥き出しにされて、上記回路基板に設けられている接続端子部に上記導電線が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、上記信号線の可撓性被覆が弾性変形してきつく嵌め込まれる信号線固定溝が設けられて、その信号線固定溝内に上記接続端子部が配置され、上記可撓性被覆の最先端縁が上記信号線固定溝内に位置する状態で、上記導電線が上記信号線固定溝内において上記接続端子部に接続されていることを特徴とする電子内視鏡の先端部。 And the solid-state image sensor and the circuit board are incorporated in the distal end of the insertion portion, the flexible covering of the signal lines drawn from the tip of the insertion arrangement signal cable into the insertion portion is peeled by the tip portion said flexible conductive lines in the coating is exposed, the tip portion of an electronic endoscope in which the conductive wire is connected to the connecting terminal portion provided on the circuit board,
The circuit board is provided with a signal line fixing groove into which the flexible covering of the signal line is elastically deformed and tightly fitted , and the connection terminal portion is disposed in the signal line fixing groove, and the flexible covering of the flexible covering is provided. A distal end portion of an electronic endoscope , wherein the conductive wire is connected to the connection terminal portion in the signal line fixing groove in a state where a leading edge is located in the signal line fixing groove . 上記信号線固定溝が、上記回路基板上に間隔をあけて並んで突設された複数の突起により形成されている請求項１記載の電子内視鏡の先端部。 2. The distal end portion of an electronic endoscope according to claim 1, wherein the signal line fixing groove is formed by a plurality of protrusions protruding in parallel on the circuit board at intervals. 上記信号線固定溝が、上記回路基板に形成された凹部により形成されている請求項１記載の電子内視鏡の先端部。 The distal end portion of the electronic endoscope according to claim 1, wherein the signal line fixing groove is formed by a recess formed in the circuit board.
JP2004195090A 2004-07-01 2004-07-01 The tip of the electronic endoscope Expired - Fee Related JP4555006B2 (en)

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JP7280592B2 (en) * 2019-01-16 2023-05-24 ｉ－ＰＲＯ株式会社 Camera module, camera and camera module cable connection method

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