JP3658204B2

JP3658204B2 - Endoscope device

Info

Publication number: JP3658204B2
Application number: JP28382298A
Authority: JP
Inventors: 治男秋庭
Original assignee: Fujinon Corp
Current assignee: Fujinon Corp
Priority date: 1998-10-06
Filing date: 1998-10-06
Publication date: 2005-06-08
Anticipated expiration: 2018-10-06
Also published as: JP2000111806A

Description

【０００１】
【発明の属する技術分野】
本発明は内視鏡装置、特にモータに変速ギヤ部、線状伝達部材等を接続して固定するための取付け部材の構造に関する。
【０００２】
【従来の技術】
内視鏡では、挿入先端部に配置された、例えば観察距離を可変させるレンズを駆動するためのモータ駆動部が内視鏡操作部に設けられる。即ち、このモータ駆動部の回転駆動力を線状の伝達部材、例えば撚り線ワイヤを用いて先端駆動部へ伝達し、ここで回転運動を直線運動に変換して所定の可動レンズを前後移動させることにより、観察距離可変動作が実行できるようになっている。
【０００３】
そして、上記モータ駆動部及び線状伝達部材は上記操作部に配置されたシャーシ（基台）に取り付けられ、上記の線状伝達部材は屈曲可能に構成されたアングル部（湾曲部）内或いはこのアングル部を含み曲げ可能に形成された挿入部内を通すため、フレキシブルな保護チューブの中に収めて配置される。これにより、アングル部を湾曲させた状態等における観察距離を変化させる時の線状伝達部材の回転を確保すると共に、挿入部内の他の部材の損傷等を防止することができる。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記従来の内視鏡内駆動部取付け構造では、上記モータ駆動部内のモータ、変速ギヤ部そして線状伝達部材のそれぞれの間での軸ずれ、或いは上記保護チューブの取付けの位置ずれがあると、駆動力の伝達効率が低下し、振動が発生する等の不都合が生じる。特に、上記線状伝達部材の保護チューブは内視鏡挿入部の径の制限により可能な限り小径とされており、位置決めを高精度に行う必要がある。
【０００５】
また、上記の撚り線ワイヤの線状伝達部材は、アングル部を含む挿入部の良好な曲げ動作を確保するために、弛ませた少し長めの状態で挿入部内に配置しており、このために、挿入部を直線状に維持しているとき、駆動力の伝達効率が低下するという問題もある。
【０００６】
更に、上記モータ駆動部は挿入部後端側の操作部内に配置されるが、この操作部は手で把持しながら内視鏡の挿入操作を行うため、手で持ちやすい大きさにする必要がある。しかし、この操作部内には、ライトガイドや送気／送水管等の他に、アングル部を曲げ動作するためのワイヤ巻取り部も配置されており、モータを含めた駆動部を従来のシャーシに取り付ける場合には、操作部の径がやや大きくなる傾向にあった。
【０００７】
本発明は上記問題点に鑑みてなされたものであり、その目的は、軸ずれ、保護チューブの位置ずれをなくして、振動のない良好な動作が確保でき、また操作部径が太くなるのを防止できる内視鏡装置を提供することにある。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、請求項１に係る発明は、操作部内に配置されたモータの駆動力を、線状伝達部材を介して挿入部の先端に配置された目的の駆動部材へ伝達する内視鏡装置において、上記線状伝達部材の外周に保護管を設け、この保護管の保持部と上記モータの保持部とを駆動部取付け部材に一体に形成し、この駆動部取付け部材を、上記操作部の内部を仕切るように設けたシャーシに固定することにより、上記モータを上記シャーシで仕切った一方の空間に配置したことを特徴とする。
請求項２に係る発明は、内視鏡内の上記シャーシに落し込み部（貫通孔、凹部、切り欠き部等）を形成し、この落し込み部に駆動部取付け体（駆動部を取付け部材に取り付けたもの）の一部を落し込みながら上記駆動部取付け部材を上記シャーシに固定することを特徴とする。
請求項３に係る発明は、上記線状伝達部材は、多重コイルバネからなることを特徴とする。
請求項４に係る発明は、上記駆動部取付け部材では、上記落し込み部に配置される壁面に上記モータを固定するための固定孔を設けたことを特徴とする。
【０００９】
上記の構成によれば、線状伝達部材の保護管の保持部とモータの保持部とが駆動部取付け部材に一体に形成され、この駆動部取付け部材が操作部の内部を仕切るシャーシに固定されるので、この保護管とモータを別個にシャーシに取り付ける必要がなく、モータ軸及びこの軸に取り付けられる線状伝達部材と保護管との位置関係が一定となり、この伝達部材の安定した動作が確保される。
【００１０】
上記請求項２の構成によれば、例えば操作部の中間位置に取り付けられるシャーシの落し込み部に、駆動部取付け体の一部が落し込まれて固定されるので、この駆動部取付け体のシャーシ面からの高さが低くなり、操作部径が太くなるのを防止できる。
【００１１】
上記請求項３の構成によれば、多重コイルバネは弛ませることなく配置され、曲げ動作時ではスプリングの伸びにより安定した位置及び回転を確保でき、伝達効率の低下が防止される。
請求項４の構成によれば、落し込み部側から固定孔のネジを緩めることにより、裏側等からモータ取付けの微調整が可能となる。
【００１２】
【発明の実施の形態】
図１乃至図４には、実施形態例に係る内視鏡（電子内視鏡）内駆動部取付け装置が示されており、まず図３及び図４によりズームレンズの駆動部に関する全体構成を説明する。図４（Ａ）は内視鏡操作部１０を示しており、図の左側に図（Ｂ）の先端部１１、アングル部（湾曲部）を含む挿入部が配置され、他方ではケーブル１２を介して光源装置やプロセッサ装置に接続される。この操作部１０の後側には、送気／送水操作釦１４Ａ、吸引操作釦１４Ｂ、フリーズスイッチ１６Ａ、画像拡大スイッチ１６Ｂ、ＶＴＲスイッチ１６Ｃや観察距離可変スイッチ１７等が設けられる。
【００１３】
また、この操作部１０の前側には、鉗子口１９が設けられ、この鉗子口１９は内部の吸引管２０の前側に配置される処置具挿通チャンネルに管接続される。その他にも、図３に示されるように、ライトガイド２１、送気／送水管、信号ケーブル等が配置される。更に、この操作部１０では、内部を中間部で仕切るようにシャーシ（基台）２２が取り付けられ、このシャーシ２２で仕切られた他方の空間にワイヤ巻取り部２４［図３］が配置され、一方の上記吸引管２０が配置された空間に駆動部取付け部材２５（詳細は後述する）が設けられる。
【００１４】
図４（Ｂ）に示されるように、先端部１１では対物レンズ２７、可動レンズ２８、プリズム２９が配置され、このプリズム２９にカバーガラス３０を介して固体撮像素子であるＣＣＤ３１が光学的に接続される。上記可動レンズ２８の保持部材３２は、その上部に雌ネジ部を有し、この雌ネジ部に雄ネジ部を螺合する回転駆動体３３が配置され、この回転駆動体３３に、多重コイルバネからなる線状伝達部材３４が連結される。従って、この線状伝達部材３４が後述するモータによって回転駆動すると可動レンズ２８が前後移動し、これによってズーム動作が可能となる。
【００１５】
図５には、上記の線状伝達部材３４の詳細な構成が示されており、図示されるように、この線状伝達部材３４は巻き方向Ｄ1のコイルバネ３４Ａとこのバネ３４Ａとは異なる巻き方向Ｄ2のコイルバネ３４Ｂを重ねた多重コイルバネとなっている。この線状伝達部材３４が、図１等に示されるように駆動部取付け部材２５から先端部１１まで配置された軟性の保護チューブ３５内に挿入され、この保護チューブ３５は内視鏡内の他の部材との干渉を避けて上記線状伝達部材３４のスムーズな回転を確保し、また上記他の部材の損傷を防止することになる。
【００１６】
また、上記線状伝達部材３４は、内視鏡挿入部を真っ直ぐしたとき、従来の撚り線ワイヤのように弛ませることなく、真っ直ぐに配置することになる。これによれば、アングル部を含む挿入部が湾曲動作するときでも、コイルバネの伸縮により保護チューブ３５内での安定した回転が確保され、駆動力伝達効率を低下させることもない。しかも、二重のコイルバネ３４Ａ，３４Ｂの巻き方向をＤ1，Ｄ2のように交差させることにより、左右の回転負荷を均一にすることができるという利点がある。
【００１７】
図１には、操作部内の駆動部が示され、図１（Ａ）は図４（Ａ）と同様に上側から見た図、図１（Ｂ）は側面側から見た図であり、図２には駆動部取付け部材２５が示されている。この駆動部取付け部材２５は、モータ３７を取付け保持するモータ保持部２５Ａ、変速ギヤ部３８のヘッド側を保持するギヤ部保持部２５Ｂ、上記線状伝達部材３４の保護チューブ３５を保持するチューブ保持部２５Ｃとを一体に形成する。この駆動部取付け部材２５には、シャーシ２２への固定孔Ｈ1が設けられると共に、上記モータ保持部２５Ａとギヤ部保持部２５Ｃの上側と下側に、ネジ固定孔Ｈ2とＨ3が設けられる。
【００１８】
一方、図１及び図３に示されるように、上記シャーシ２２にはモータ３７及び変速ギヤ部３８の部分を落し込むための落し孔４０が形成され、この落し孔４０に位置決めするための段差（鉤状部）４１が上記駆動部取付け部材２５の下側に形成される。そして、この段差４１とシャーシ２２の取付け面（表面）との間に、振動を吸収するためのゴム弾性体等の緩衝部材４２が配置される。
【００１９】
更に、上記変速ギヤ部３８の回転軸４４と線状伝達部材３４の軸部４５が軸接続具４６で接続されており、この軸接続では、上記回転軸４４及び軸部４５にＤカットを形成し、このＤカットの面を軸接続具４６側からネジ止めすることにより、両者が固定される。なお、この軸接続具４６は、カバー筒体４７内に収納される。
【００２０】
このような構成によれば、上記の駆動部取付け部材２５において、モータ３７が保持部２５Ａに配置され、変速ギヤ部３８が保持部２５Ｂに配置され、これらはそれぞれの保持部２５Ａ，２５Ｂのネジ固定孔Ｈ２，Ｈ3によって固定される。当該例では、モータ３７だけでなく、変速ギヤ部３８でも（両方で）ネジ固定することにより、線状伝達部材３４までを含む回転部の軸ずれ等による振動の発生が抑制される。なお、上記ギヤ部３８の軸４４は、軸接続具４６で線状伝達部材３４の軸部４５に固定され、カバー筒体４７が被せられる。
【００２１】
また、上記線状伝達部材３４の外周に配置された保護チューブ３５が上記駆動部取付け部材２５のチューブ保持部２５Ｃに接着剤等により固定される。そして、この駆動部取付け部材２５は上記緩衝部材４２を挟みながら、その下部が落し孔４０に落し込まれて段差４１によって位置決めされ、固定孔Ｈ1を介してシャーシ２２に固定される。
【００２２】
このような駆動部取付け部材２５によれば、上記チューブ保持部２５Ｃが他の保持部２５Ａ，２５Ｂと一体形成されているので、保護チューブ３５の中心位置と線状伝達部材３４の回転中心位置の位置合わせが精度良く行われ、この線状伝達部材３４のスムーズな回転が確保される。しかも、モータ３７や変速ギヤ部３８等で生じる振動は緩衝部材４２で吸収されるため、操作部１０等への振動の伝達が抑制される。また、このモータ３７の保持部２５Ａと変速ギヤ部３８の保持部２５Ｂが一体に形成されることによっても、軸ずれ防止の効果がある。即ち、変速ギヤ部３８の保持部２５Ｂをモータ３７の保持部２５Ａと別個に形成した場合は、上記緩衝部材４２との関係でシャーシ２２からの取付け高さにずれが生じ、軸ずれにつながるからである。
【００２３】
更に、上記各部材を取り付けた駆動部取付け部材２５（駆動部取付け体）はシャーシ２２の孔４０に落し込むので、取付け後のシャーシ面からの高さが低くなる。また、この落し孔４０側に、ネジ固定孔Ｈ3を配置することにより、落し孔４０を利用したモータ３７、変速ギヤ部３８の固定状態の調整が可能である。即ち、上記駆動部取付け部材２５をシャーシ２２に取り付けた後に、モータ３７、変速ギヤ部３８のスラスト方向の微調整が必要な場合があるが、このときに、上記落し孔４０を利用すれば、モータ配置側とは反対の側（裏側）からネジ固定孔Ｈ3でスラスト方向位置の微調整ができる。
【００２４】
【発明の効果】
以上説明したように、本発明によれば、モータの駆動力を目的の駆動部材へ伝達する線状伝達部材の外周に保護管を設け、この保護管の保持部と上記モータの保持部とを駆動部取付け部材に一体に形成し、この駆動部取付け部材を操作部の内部を仕切るシャーシに固定したので、軸ずれ、保護チューブの位置ずれをなくして、振動のない良好な動作が確保できる。
【００２５】
また、請求項２の発明によれば、シャーシに落し込み部を形成し、駆動部取付け体の一部を落し込んで配置したので、操作部径が太くなるのを防止できるという利点がある。
更に、請求項３の発明によれば、曲げ動作時ではスプリングの伸びにより安定した回転を確保でき、伝達効率の低下が防止され、請求項４の構成によれば、裏側等から落し込み部を利用したモータ取付け位置の微調整が可能となる。
【図面の簡単な説明】
【図１】本発明の実施形態例に係る内視鏡装置を示し、図（Ａ）は上面図、図（Ｂ）は側面図である。
【図２】実施形態例の駆動部取付け部材の構造を示す図である。
【図３】実施形態例の内視鏡操作部の内部を内視鏡軸方向から見た断面図である。
【図４】内視鏡におけるズームレンズ駆動に関する構成を示し、図（Ａ）は操作部の図、図（Ｂ）は先端部の拡大図である。
【図５】実施形態例の線状伝達部材の構成を示し、図（Ａ）は外側コイルバネを一部外した状態の図、図（Ｂ）は図（Ａ）の軸方向断面図である。
【符号の説明】
１０ … 内視鏡操作部、１１ … 先端部、
２２ … シャーシ、２５ … 駆動部取付け部材、
２５Ａ，２５Ｂ，２５Ｃ … 保持部、
３４ … 線状伝達部材、３５ … 保護チューブ、
４０ … 落し孔、４１ … 段差、
４２ … 緩衝部材、
３７ … モータ、３８ … 変速ギヤ部、
Ｈ1，Ｈ2，Ｈ3 … 固定孔。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope apparatus, and more particularly to a structure of an attachment member for connecting and fixing a transmission gear portion, a linear transmission member, and the like to a motor.
[0002]
[Prior art]
In an endoscope, a motor driving unit for driving a lens that is arranged at an insertion distal end and that changes, for example, an observation distance is provided in the endoscope operation unit. That is, the rotational drive force of the motor drive unit is transmitted to the tip drive unit using a linear transmission member, for example, a stranded wire, where the rotary motion is converted into a linear motion to move a predetermined movable lens back and forth. Thus, the observation distance variable operation can be executed.
[0003]
The motor drive unit and the linear transmission member are attached to a chassis (base) disposed in the operation unit, and the linear transmission member is in an angle part (curved part) configured to be bendable. In order to pass through the insertion portion that is bent and includes the angle portion, the insertion portion is placed in a flexible protective tube. Accordingly, it is possible to ensure the rotation of the linear transmission member when changing the observation distance in a state where the angle portion is curved, and to prevent damage to other members in the insertion portion.
[0004]
[Problems to be solved by the invention]
However, in the conventional endoscope drive unit mounting structure, there is a shaft misalignment among the motor, the transmission gear unit, and the linear transmission member in the motor drive unit, or a position shift of the protection tube mounting. As a result, the transmission efficiency of the driving force is lowered, and inconveniences such as vibrations occur. In particular, the protective tube of the linear transmission member is made as small as possible due to the restriction of the diameter of the endoscope insertion portion, and positioning needs to be performed with high accuracy.
[0005]
In addition, the above-described wire transmission member of the stranded wire is arranged in the insertion portion in a slightly slackened state in order to ensure a good bending operation of the insertion portion including the angle portion. When the insertion part is maintained in a straight line, there is a problem that the transmission efficiency of the driving force is lowered.
[0006]
Further, the motor drive unit is disposed in the operation unit on the rear end side of the insertion unit. This operation unit performs the insertion operation of the endoscope while being grasped by a hand, and therefore needs to be sized to be easily held by the hand. is there. However, in addition to the light guide and air / water pipe, etc., a wire take-up part for bending the angle part is also arranged in this operation part, and the drive part including the motor is attached to the conventional chassis. When attaching, the diameter of the operation part tended to be slightly larger.
[0007]
The present invention has been made in view of the above problems, and its purpose is to eliminate shaft misalignment and positional displacement of the protective tube, to ensure good operation without vibration, and to increase the diameter of the operation section. An object of the present invention is to provide an endoscopic device that can prevent the above.
[0008]
[Means for Solving the Problems]
To achieve the above object, the invention according to claim 1, the driving force of the motor disposed in the operation portion, is transmitted to the drive member disposed at the distal end of the insertion portion via the linear transmission member object In the endoscope apparatus, a protective tube is provided on the outer periphery of the linear transmission member, and a holding portion of the protective tube and a holding portion of the motor are formed integrally with the driving portion mounting member. The motor is arranged in one space partitioned by the chassis by being fixed to a chassis provided so as to partition the inside of the operation unit .
The invention according to claim 2, the chassis in the drop addition unit in the endoscope (through holes, recesses, notches, etc.) is formed and the member mounting the drive unit attachment member (drive unit in the drop addition unit The drive unit attachment member is fixed to the chassis while dropping a part of the attachment).
The invention according to claim 3 is characterized in that the linear transmission member comprises a multiple coil spring.
According to a fourth aspect of the present invention, in the drive unit mounting member, a fixing hole for fixing the motor is provided in a wall surface arranged in the drop-in portion.
[0009]
According to the above configuration, the protective tube holding portion of the linear transmission member and the motor holding portion are formed integrally with the drive portion mounting member, and the drive portion mounting member is fixed to the chassis that partitions the inside of the operation portion. Runode, it is not necessary to mount the protective tube and the motor to separately chassis, the positional relationship between the linear transmission member attached to the motor shaft and the shaft and the protective tube becomes constant, stable operation of the transmission member is secured Is done.
[0010]
According to the second aspect of the present invention, for example, a part of the drive unit mounting body is dropped and fixed to the drop portion of the chassis that is mounted at an intermediate position of the operation unit. It is possible to prevent the height from the surface from being lowered and the operating portion diameter from becoming thick.
[0011]
According to the configuration of the third aspect, the multi-coil spring is arranged without slackening, and a stable position and rotation can be secured by the extension of the spring during the bending operation, thereby preventing a decrease in transmission efficiency.
According to the fourth aspect of the present invention, it is possible to finely adjust the motor mounting from the back side or the like by loosening the screw of the fixing hole from the dropping part side.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an endoscope (electronic endoscope) drive unit mounting device according to an embodiment. First, the overall configuration of the zoom lens drive unit will be described with reference to FIGS. 3 and 4. FIG. To do. FIG. 4A shows an endoscope operation unit 10, and an insertion portion including a distal end portion 11 and an angle portion (curving portion) in FIG. Connected to the light source device and the processor device. On the rear side of the operation unit 10, an air / water supply operation button 14A, a suction operation button 14B, a freeze switch 16A, an image enlargement switch 16B, a VTR switch 16C, an observation distance variable switch 17, and the like are provided.
[0013]
In addition, a forceps port 19 is provided on the front side of the operation unit 10, and the forceps port 19 is connected to a treatment instrument insertion channel disposed on the front side of the internal suction tube 20. In addition, as shown in FIG. 3, a light guide 21, an air / water pipe, a signal cable, and the like are arranged. Further, in this operation unit 10, a chassis (base) 22 is attached so as to partition the inside by an intermediate part, and a wire winding unit 24 [FIG. 3] is arranged in the other space partitioned by the chassis 22, A drive unit mounting member 25 (details will be described later) is provided in a space in which the one suction pipe 20 is disposed.
[0014]
As shown in FIG. 4B, an objective lens 27, a movable lens 28, and a prism 29 are disposed at the distal end portion 11, and a CCD 31 that is a solid-state imaging device is optically connected to the prism 29 via a cover glass 30. Is done. The holding member 32 of the movable lens 28 has a female threaded portion at the upper portion thereof, and a rotational driving body 33 for screwing the male threaded portion into the female threaded portion is disposed. The linear transmission member 34 is connected. Accordingly, when the linear transmission member 34 is rotationally driven by a motor to be described later, the movable lens 28 moves back and forth, thereby enabling a zoom operation.
[0015]
FIG. 5 shows a detailed configuration of the above-described linear transmission member 34. As shown in FIG. 5, the linear transmission member 34 includes a coil spring 34A in the winding direction D1 and a winding direction different from the spring 34A. This is a multi-coil spring in which the D2 coil spring 34B is overlapped. The linear transmission member 34 is inserted into a flexible protective tube 35 disposed from the drive unit mounting member 25 to the distal end portion 11 as shown in FIG. 1 and the like. Thus, the linear transmission member 34 can be smoothly rotated while avoiding interference with the other member, and the other members can be prevented from being damaged.
[0016]
Further, when the endoscope insertion portion is straightened, the linear transmission member 34 is arranged straight without being slackened like a conventional stranded wire. According to this, even when the insertion portion including the angle portion performs a bending operation, stable rotation within the protective tube 35 is ensured by expansion and contraction of the coil spring, and driving force transmission efficiency is not reduced. In addition, there is an advantage that the left and right rotational loads can be made uniform by intersecting the winding directions of the double coil springs 34A and 34B like D1 and D2.
[0017]
FIG. 1 shows a drive unit in the operation unit. FIG. 1 (A) is a view as seen from the upper side as in FIG. 4 (A), and FIG. 1 (B) is a view as seen from the side. In FIG. 2, a drive portion mounting member 25 is shown. The drive unit mounting member 25 includes a motor holding unit 25A for mounting and holding the motor 37, a gear unit holding unit 25B for holding the head side of the transmission gear unit 38, and a tube holding for holding the protective tube 35 of the linear transmission member 34. The part 25C is integrally formed. The drive portion mounting member 25 is provided with a fixing hole H1 for the chassis 22, and screw fixing holes H2 and H3 are provided above and below the motor holding portion 25A and the gear portion holding portion 25C.
[0018]
On the other hand, as shown in FIGS. 1 and 3, a drop hole 40 for dropping the motor 37 and the transmission gear portion 38 is formed in the chassis 22, and a step (for positioning in the drop hole 40 ( 41) is formed on the lower side of the drive unit mounting member 25. A buffer member 42 such as a rubber elastic body for absorbing vibration is disposed between the step 41 and the mounting surface (surface) of the chassis 22.
[0019]
Further, the rotation shaft 44 of the transmission gear portion 38 and the shaft portion 45 of the linear transmission member 34 are connected by a shaft connector 46. In this shaft connection, a D cut is formed on the rotation shaft 44 and the shaft portion 45. The two D-cut surfaces are fixed by screwing them from the shaft connector 46 side. The shaft connector 46 is accommodated in the cover cylinder 47.
[0020]
According to such a configuration, in the drive unit mounting member 25 described above, the motor 37 is disposed in the holding unit 25A, and the transmission gear unit 38 is disposed in the holding unit 25B, and these are the screws of the respective holding units 25A and 25B. It is fixed by fixing holes H2 and H3. In this example, not only the motor 37 but also the speed change gear portion 38 (both) are screw-fixed, thereby suppressing the occurrence of vibration due to the axial deviation of the rotating portion including the linear transmission member 34. The shaft 44 of the gear portion 38 is fixed to the shaft portion 45 of the linear transmission member 34 by a shaft connector 46, and a cover cylinder 47 is covered.
[0021]
Further, the protective tube 35 disposed on the outer periphery of the linear transmission member 34 is fixed to the tube holding portion 25C of the drive portion mounting member 25 with an adhesive or the like. Then, the drive unit mounting member 25 has its lower part dropped into the drop hole 40 while being sandwiched by the buffer member 42, positioned by the step 41, and fixed to the chassis 22 via the fixing hole H1.
[0022]
According to such a drive part mounting member 25, since the tube holding part 25C is integrally formed with the other holding parts 25A and 25B, the center position of the protective tube 35 and the rotation center position of the linear transmission member 34 are arranged. Positioning is performed with high accuracy, and smooth rotation of the linear transmission member 34 is ensured. In addition, since vibration generated by the motor 37, the transmission gear unit 38, and the like is absorbed by the buffer member 42, transmission of vibration to the operation unit 10 and the like is suppressed. Also, the holding portion 25A of the motor 37 and the holding portion 25B of the transmission gear portion 38 are integrally formed, and there is an effect of preventing the shaft misalignment. That is, when the holding portion 25B of the transmission gear portion 38 is formed separately from the holding portion 25A of the motor 37, the mounting height from the chassis 22 is shifted due to the buffer member 42, leading to an axial shift. It is.
[0023]
Furthermore, since the drive part attachment member 25 (drive part attachment body) to which each of the above members is attached falls into the hole 40 of the chassis 22, the height from the chassis surface after the attachment becomes low. Further, by arranging the screw fixing hole H3 on the dropping hole 40 side, it is possible to adjust the fixed state of the motor 37 and the transmission gear portion 38 using the dropping hole 40. That is, after the drive unit mounting member 25 is mounted on the chassis 22, fine adjustment in the thrust direction of the motor 37 and the transmission gear unit 38 may be necessary. At this time, if the drop hole 40 is used, The position in the thrust direction can be finely adjusted from the side opposite to the motor arrangement side (back side) with the screw fixing hole H3.
[0024]
【The invention's effect】
As described above, according to the present invention, the protective tube is provided on the outer periphery of the linear transmission member that transmits the driving force of the motor to the target driving member, and the holding portion of the protective tube and the holding portion of the motor are provided. Since it is formed integrally with the drive unit mounting member and this drive unit mounting member is fixed to the chassis that partitions the inside of the operation unit, it is possible to eliminate the shaft misalignment and the position shift of the protective tube, and to ensure a good operation without vibration.
[0025]
According to the second aspect of the present invention, since the drop portion is formed in the chassis and a part of the drive portion mounting body is dropped and arranged, there is an advantage that the diameter of the operation portion can be prevented from being increased.
Further, according to the invention of claim 3, during the bending operation, stable rotation can be ensured by the extension of the spring, and the transmission efficiency is prevented from being lowered. According to the structure of claim 4, the drop-in part is provided from the back side or the like. The used motor mounting position can be finely adjusted.
[Brief description of the drawings]
FIG. 1 shows an endoscope apparatus according to an embodiment of the present invention, in which FIG. (A) is a top view and FIG. (B) is a side view.
FIG. 2 is a diagram illustrating a structure of a drive unit mounting member according to an embodiment.
FIG. 3 is a cross-sectional view of the inside of an endoscope operation unit according to an embodiment as viewed from the endoscope axis direction.
4A and 4B show a configuration related to driving of a zoom lens in an endoscope, in which FIG. 4A is a diagram of an operation unit, and FIG.
5A and 5B show a configuration of a linear transmission member according to an embodiment, in which FIG. 5A is a diagram with a part of an outer coil spring removed, and FIG. 5B is an axial sectional view of FIG.
[Explanation of symbols]
10 ... Endoscope operation part, 11 ... Tip part,
22 ... Chassis, 25 ... Drive unit mounting member,
25A, 25B, 25C ... holding part,
34 ... linear transmission member, 35 ... protective tube,
40 ... flow hole, 41 ... step,
42 ... cushioning member,
37 ... motor, 38 ... transmission gear section,
H1, H2, H3 ... Fixed holes.

Claims

操作部内に配置されたモータの駆動力を、線状伝達部材を介して挿入部の先端に配置された目的の駆動部材へ伝達する内視鏡装置において、
上記線状伝達部材の外周に保護管を設け、
この保護管の保持部と上記モータの保持部とを駆動部取付け部材に一体に形成し、
この駆動部取付け部材を、上記操作部の内部を仕切るように設けたシャーシに固定することにより、上記モータを上記シャーシで仕切った一方の空間に配置したことを特徴とする内視鏡装置。The driving force of the deployed motor operation portion, an endoscope device for transmitting the driving member disposed at the distal end of the insertion portion via the linear transmission member end,
A protective tube is provided on the outer periphery of the linear transmission member,
The protective tube holding portion and the motor holding portion are formed integrally with the drive portion mounting member ,
An endoscope apparatus, wherein the drive unit mounting member is fixed to a chassis provided so as to partition the inside of the operation unit, thereby arranging the motor in one space partitioned by the chassis .

内視鏡内の上記シャーシに落し込み部を形成し、この落し込み部に駆動部取付け体の一部を落し込みながら上記駆動部取付け部材を上記シャーシに固定することを特徴とする上記請求項１記載の内視鏡装置。The said drive part attachment member is fixed to the said chassis, forming a drop part in the said chassis in an endoscope, and dropping a part of drive part attachment body in this drop part. 1. The endoscope apparatus according to 1.

上記線状伝達部材は、多重コイルバネからなることを特徴とする上記請求項１記載の内視鏡装置。 The endoscope apparatus according to claim 1, wherein the linear transmission member includes a multiple coil spring.

上記駆動部取付け部材では、上記落し込み部に配置される壁面に上記モータを固定するための固定孔を設けたことを特徴とする上記請求項２記載の内視鏡装置。The endoscope apparatus according to claim 2, wherein the driving unit mounting member is provided with a fixing hole for fixing the motor to a wall surface arranged in the drop-in part.