JP5860693B2

JP5860693B2 - Endoscope

Info

Publication number: JP5860693B2
Application number: JP2011284345A
Authority: JP
Inventors: 松浦　伸之; 伸之松浦; 上野　晴彦; 晴彦上野
Original assignee: Olympus Corp
Current assignee: Olympus Corp
Priority date: 2011-12-26
Filing date: 2011-12-26
Publication date: 2016-02-16
Anticipated expiration: 2031-12-26
Also published as: JP2013132389A

Description

本発明は、操作部のケーシング内に配設された筒状部材と、処置具挿通用チャンネルと操作部の処置具挿入口と吸引通路との間を連結する連結用の分岐部材とを備えた内視鏡に関する。 The present invention includes a cylindrical member disposed in the casing of the operation unit, and a branch member for connection that connects the treatment instrument insertion channel, the treatment instrument insertion port of the operation unit, and the suction passage. It relates to an endoscope.

特許文献１には、内視鏡のチャンネルの基端側に処置具挿入孔と吸引通路に分岐する金属製の分岐部材が設けられている構成の内視鏡が示されている。また、操作部のケーシング内には、操作部の内部への挿通部材の保護及び保形性等の観点から金属で形成される筒状部材が配設されている。そして、従来の分岐部材は、ねじ部材によりこの筒状部材に固定されている。 Patent Document 1 shows an endoscope having a configuration in which a metal branch member that branches into a treatment instrument insertion hole and a suction passage is provided on the proximal end side of a channel of the endoscope. In addition, a cylindrical member formed of metal is disposed in the casing of the operation unit from the viewpoint of protection of the insertion member inside the operation unit and shape retention. And the conventional branch member is being fixed to this cylindrical member with the screw member.

特開平１１−４７０８３号公報JP 11-47083 A

特許文献１のような従来の内視鏡では、金属製の分岐部材は切削加工で管路が形成されているとともに、金属製の分岐部材を筒状部材に固定するために分岐部材にねじ穴を追加で機械加工する必要があるので、部品単価が高くなる。さらに、内視鏡の製造時には分岐部材を筒状部材にねじ部材によってねじ締めする作業等が必要なため、組み付け作業に時間がかかり、組立て費用が高くなっている。 In a conventional endoscope such as Patent Document 1, a pipe is formed by cutting a metal branch member, and a screw hole is formed in the branch member in order to fix the metal branch member to the cylindrical member. Since it is necessary to perform additional machining, the unit cost of the parts becomes high. Furthermore, since an operation of screwing the branching member to the cylindrical member with a screw member is necessary at the time of manufacturing the endoscope, the assembling operation takes time and the assembling cost is high.

本発明は上記事情に着目してなされたもので、その目的は、組立てが容易で、分岐部材の安価な取付け構造を具備した内視鏡を提供することにある。 The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide an endoscope that is easy to assemble and has an inexpensive mounting structure for a branch member.

本発明の一局面の態様は、挿入部の基端側に延設される筒状部材と、前記筒状部材の側壁に設けられた開口部と、前記筒状部材の内部に配置され、前記筒状部材の軸方向に開通する第１の通路および前記筒状部材の軸方向以外の方向に開通する第２の通路との連通部を有する分岐部材と、前記開口部の前縁に形成され、前記分岐部材が当接して前記筒状部材の軸方向に沿う前記分岐部材の移動を規制する突当て部と、前記開口部の側面から前記筒状部材の軸方向と交差する方向へ延出され、前記分岐部材を挟持する一対の挟持片を有する受け部と、前記受け部と前記分岐部材との接触部に設けられ、前記受け部と前記分岐部材との間を係脱可能に係合する係合部と、を備え、前記係合部は、前記分岐部材の側面に設けられた第１凹部または第１凸部のいずれか一方と、前記受け部に設けられ、前記第１凹部と係合する第２凸部または前記第１凸部と係合する第２凹部と、を含んでなる内視鏡である。
そして、上記構成では、挿入部の基端側に延設される筒状部材に分岐部材を組み付ける作業時には、筒状部材の側壁に設けられた開口部の前縁の突当て部に分岐部材を当接させることで、筒状部材の軸方向に沿う分岐部材の移動を規制するとともに、開口部の側面に配置された受け部の一対の挟持片間に分岐部材が挟持され、筒状部材の円周方向に沿う分岐部材の動きを規制する。この一対の挟持片間に分岐部材が挟持される際に、係合部によって受け部と前記分岐部材との間が係脱可能に係合固定される。これにより、分岐部材にねじ穴を機械加工するなどの追加の作業が不要になり、組立てが容易で、分岐部材のコスト低下を図るようにしたものである。 An aspect of one aspect of the present invention includes a cylindrical member extending on the proximal end side of the insertion portion, an opening provided in a side wall of the cylindrical member, and an inside of the cylindrical member, A branch member having a communicating portion with a first passage opened in the axial direction of the tubular member and a second passage opened in a direction other than the axial direction of the tubular member, and formed at the front edge of the opening The abutting portion that contacts the branching member and restricts the movement of the branching member along the axial direction of the cylindrical member, and extends from the side surface of the opening in a direction intersecting the axial direction of the cylindrical member. And a receiving portion having a pair of holding pieces for holding the branch member, and a contact portion between the receiving portion and the branch member, wherein the receiving portion and the branch member are detachably engaged. It includes an engaging portion for the said engaging portion, the first recess or the second provided on a side surface of the dividing member And one of the convex portion, provided in the receiving portion, the endoscope comprising a second recess for engagement with the second convex portion or the first convex portion that engages with the first recess is there.
And in the said structure, a branch member is attached to the abutting part of the front edge of the opening part provided in the side wall of a cylindrical member at the time of the operation | work which attaches a branched member to the cylindrical member extended in the base end side of an insertion part. By abutting, the movement of the branching member along the axial direction of the tubular member is restricted, and the branching member is sandwiched between a pair of sandwiching pieces of the receiving portion disposed on the side surface of the opening. The movement of the branching member along the circumferential direction is restricted. When the branching member is sandwiched between the pair of sandwiching pieces, the receiving portion and the branching member are detachably engaged and fixed by the engaging portion. This eliminates the need for additional work such as machining a screw hole in the branch member, facilitates assembly, and reduces the cost of the branch member.

好ましくは、前記分岐部材の第１凹部は、前記分岐部材の貫通穴の両端部によって形成されている。
そして、上記構成では、一対の挟持片間に分岐部材が挟持される際に、分岐部材の貫通穴の両端部によって形成されている第１凹部と受け部の第２凸部との間が係脱可能に係合される。 Preferably, the 1st recessed part of the said branch member is formed of the both ends of the through-hole of the said branch member.
And in the said structure, when a branch member is clamped between a pair of clamping pieces, between the 1st recessed part formed of the both ends of the through-hole of a branch member, and the 2nd convex part of a receiving part is engaged. Removably engaged.

好ましくは、前記受け部は、前記第２凸部が前記分岐部材の前記貫通穴に挿通された状態で係止されるスプリングピンを有する。
そして、上記構成では、一対の挟持片間に分岐部材が挟持される際に、分岐部材の貫通穴に受け部のスプリングピンが挿通された状態で係止されることで、分岐部材の側面に設けられた第１凹部と受け部の第２凸部との間が係脱可能に係合される。 Preferably, the receiving portion includes a spring pin that is locked in a state in which the second convex portion is inserted through the through hole of the branch member.
And in the said structure, when a branch member is clamped between a pair of clamping pieces, the spring pin of a receiving part is latched in the through-hole of a branch member, and it fixes to the side surface of a branch member. The provided first concave portion and the second convex portion of the receiving portion are detachably engaged.

好ましくは、前記受け部は、前記一対の挟持片の少なくとも一方が弾性変形可能な板ばね状の部材によって形成され、前記受け部の第２凸部は、前記挟持片に内方向に向けて突出成形された突出成形部によって形成されている。
そして、上記構成では、一対の挟持片間に分岐部材が挟持される際に、突出成形部によって形成されている受け部の第２凸部が分岐部材と当接することで、一対の挟持片の少なくとも一方の板ばね状の部材が弾性変形しながら受け部の第２凸部が分岐部材の側壁を乗り越えて第１凹部に挿入されることにより、分岐部材の第１凹部と受け部の第２凸部との間が係脱可能に係合される。 Preferably, the receiving portion is formed by a leaf spring-like member in which at least one of the pair of holding pieces is elastically deformable, and the second convex portion of the receiving portion protrudes inward from the holding piece. It is formed by the molded protruding molded part.
And in the said structure, when a branch member is clamped between a pair of clamping pieces, the 2nd convex part of the receiving part formed of the protrusion shaping | molding part contact | abuts a branch member, and a pair of clamping piece of While the at least one leaf spring-like member is elastically deformed and the second convex portion of the receiving portion gets over the side wall of the branching member and is inserted into the first concave portion, the first concave portion of the branching member and the second of the receiving portion are The protrusions are engaged with each other in a detachable manner.

好ましくは、前記受け部は、前記一対の挟持片の少なくとも一方が弾性変形可能な板ばね状の部材によって形成され、前記受け部の第２凹部は、前記挟持片に外方向に向けて突出成形された突出成形部の内面側の凹部または穴の一方によって形成されている。
そして、上記構成では、一対の挟持片間に分岐部材が挟持される際に、分岐部材の第１凸部が一対の挟持片と当接することで、一対の挟持片の少なくとも一方の板ばね状の部材が弾性変形しながら分岐部材の第１凸部が挟持片の突出成形部の内面側の凹部または穴の一方によって形成されている受け部の第２凹部に挿入されることにより、分岐部材の第１凸部と受け部の第２凹部との間が係脱可能に係合される。 Preferably, the receiving part is formed by a leaf spring-like member in which at least one of the pair of sandwiching pieces is elastically deformable, and the second recessed part of the receiving part is formed so as to project outward from the sandwiching piece. It is formed by one of the concave portion or the hole on the inner surface side of the protruding molded portion.
And in the said structure, when a branch member is clamped between a pair of clamping pieces, the 1st convex part of a branching member contact | abuts a pair of clamping pieces, and at least one leaf | plate spring shape of a pair of clamping pieces The first convex portion of the branch member is inserted into the second concave portion of the receiving portion formed by one of the concave portion or the hole on the inner surface side of the protruding molded portion of the sandwiching piece while the member of the branch member is elastically deformed, thereby The first convex portion and the second concave portion of the receiving portion are detachably engaged.

好ましくは、前記係合部は、前記受け部の一対の挟持片に前記筒状部材の軸方向に延設されたレールと、前記分岐部材に設けられ、前記レールと係合する溝部と、を含んでなる。
そして、上記構成では、挿入部の基端側に延設される筒状部材に分岐部材を組み付ける作業時には、筒状部材の側壁に設けられた開口部の前縁の突当て部に分岐部材を当接させることで、筒状部材の軸方向に沿う分岐部材の移動を規制するとともに、開口部の側面に配置された受け部の一対の挟持片間に分岐部材が挟持される。この一対の挟持片間に分岐部材が挟持される際に、一対の挟持片のレールが分岐部材の溝部に挿入されることで、受け部と前記分岐部材との間が係脱可能に係合される。 Preferably, the engaging portion includes: a rail extending in the axial direction of the cylindrical member on the pair of sandwiching pieces of the receiving portion; and a groove portion provided on the branch member and engaged with the rail. Comprising.
And in the said structure, a branch member is attached to the abutting part of the front edge of the opening part provided in the side wall of a cylindrical member at the time of the operation | work which attaches a branched member to the cylindrical member extended in the base end side of an insertion part. By abutting, the movement of the branch member along the axial direction of the tubular member is restricted, and the branch member is sandwiched between the pair of sandwiching pieces of the receiving portion disposed on the side surface of the opening. When the branching member is sandwiched between the pair of sandwiching pieces, the rails of the pair of sandwiching pieces are inserted into the groove portions of the branching member so that the receiving portion and the branching member are detachably engaged. Is done.

好ましくは、前記受け部は、前記レールの終端部に前記筒状部材の軸方向と交差する方向に延設された第３凸部を有し、前記分岐部材は、前記溝部に前記レールの前記第３凸部と係合する第４凹部が形成されている。
そして、上記構成では、一対の挟持片間に分岐部材が挟持される際に、一対の挟持片のレールが分岐部材の溝部に挿入されることで、受け部と前記分岐部材との間が係脱可能に係合される。このとき、レールの終端部の第３凸部と分岐部材の第４凹部との間が係脱可能に係合される。 Preferably, the receiving portion includes a third convex portion extending in a direction intersecting with an axial direction of the cylindrical member at a terminal portion of the rail, and the branch member is provided in the groove portion with the rail of the rail. A fourth concave portion that engages with the third convex portion is formed.
In the above configuration, when the branch member is sandwiched between the pair of sandwiching pieces, the rails of the pair of sandwiching pieces are inserted into the groove portions of the branching member, whereby the receiving portion and the branch member are engaged. Removably engaged. At this time, the third convex portion of the terminal end portion of the rail and the fourth concave portion of the branching member are detachably engaged.

好ましくは、前記筒状部材は、操作部のケーシング内に設けられた円筒部材によって形成され、前記分岐部材は、金属材料で形成された分岐部材本体を有し、前記第１の通路の先端側に処置具挿通チャンネルの基端部が連結されるとともに、前記第１の通路の基端側に吸引通路が接続され、前記第２の通路に前記操作部に設けられた処置具挿入口から挿入される処置具を導入する処置具挿入口体が連結される。
そして、上記構成では、操作部のケーシング内に設けられた円筒部材によって形成された筒状部材に金属材料で形成された分岐部材の分岐部材本体が組み付けられる。このとき、分岐部材本体の第１の通路の先端側に処置具挿通チャンネルの基端部が連結されるとともに、前記第１の通路の基端側に吸引通路が接続され、前記第２の通路に前記操作部に設けられた処置具挿入口から挿入される処置具を導入する処置具挿入口体が連結される。 Preferably, the cylindrical member is formed by a cylindrical member provided in a casing of the operation unit, and the branching member has a branching member main body formed of a metal material, and the distal end side of the first passage And a suction passage is connected to the proximal end side of the first passage, and the second passage is inserted from a treatment instrument insertion port provided in the operation portion. A treatment instrument insertion port for introducing a treatment instrument to be performed is connected.
And in the said structure, the branch member main body of the branch member formed with the metal material is assembled | attached to the cylindrical member formed of the cylindrical member provided in the casing of the operation part. At this time, the proximal end portion of the treatment instrument insertion channel is connected to the distal end side of the first passage of the branch member body, and the suction passage is connected to the proximal end side of the first passage, and the second passage A treatment instrument insertion port for introducing a treatment instrument to be inserted from a treatment instrument insertion port provided in the operation unit is connected to the operation unit.

本発明によれば、組立てが容易で、分岐部材の安価な取付け構造を具備した内視鏡装置を提供することができる。 According to the present invention, it is possible to provide an endoscope apparatus that is easy to assemble and has an inexpensive mounting structure for a branch member.

本発明の第１の実施の形態の内視鏡の全体の概略構成を示す斜視図。1 is a perspective view showing an overall schematic configuration of an endoscope according to a first embodiment of the present invention. 第１の実施の形態の内視鏡の操作部内の円筒部材と分岐部材との連結部分を示す要部の縦断面図。The longitudinal cross-sectional view of the principal part which shows the connection part of the cylindrical member and branch member in the operation part of the endoscope of 1st Embodiment. 第１の実施の形態の内視鏡の円筒部材を示す斜視図。The perspective view which shows the cylindrical member of the endoscope of 1st Embodiment. 第１の実施の形態の内視鏡の円筒部材の突当て部と分岐部材の前縁の係合溝との係合部分を示す要部の縦断面図。The longitudinal cross-sectional view of the principal part which shows the engaging part of the abutting part of the cylindrical member of the endoscope of 1st Embodiment, and the engaging groove of the front edge of a branch member. 図４のＶ−Ｖ線断面図。VV sectional view taken on the line of FIG. 本発明の第２の実施の形態の内視鏡の円筒部材を示す斜視図。The perspective view which shows the cylindrical member of the endoscope of the 2nd Embodiment of this invention. 第２の実施の形態の内視鏡の操作部内の円筒部材と分岐部材との連結部分を示す要部の横断面図。The transverse cross section of the important section showing the connection part of the cylindrical member and branching member in the operation part of the endoscope of a 2nd embodiment. 第２の実施の形態の第１の変形例を示す要部の横断面図。The transverse cross section of the important section showing the 1st modification of a 2nd embodiment. 第２の実施の形態の第２の変形例を示す要部の横断面図。The transverse cross section of the important section showing the 2nd modification of a 2nd embodiment. 本発明の第３の実施の形態の内視鏡の円筒部材を示す斜視図。The perspective view which shows the cylindrical member of the endoscope of the 3rd Embodiment of this invention. 第３の実施の形態の内視鏡の操作部内の円筒部材のレールと分岐部材の溝部との連結部分を示す要部の横断面図。The transverse cross section of the important section showing the connection part of the rail of the cylindrical member in the operation part of the endoscope of a 3rd embodiment, and the groove part of a branching member. 第３の実施の形態の内視鏡の円筒部材レールの爪部と分岐部材の溝部の係合凹部との連結部分を示す要部の横断面図。The transverse cross section of the important section showing the connection part of the claw part of the cylindrical member rail of the endoscope of a 3rd embodiment, and the engagement crevice of the groove part of a branching member.

［第１の実施の形態］
（構成）
図１乃至図５は、本発明の第１の実施の形態を示す。図１は本実施の形態の内視鏡１の全体の概略構成を示す図である。図示のごとく、内視鏡１は、挿入部２と、操作部３と、ユニバーサルコード４とから構成される。挿入部２は、細長い可撓管部５と、湾曲部６と、先端硬質部７とが設けられている。挿入部２は、ポリウレタン等の樹脂で被覆されるとともに、後端部分は操作部３に接続され、その接続部は折れ止め部材８により保護されている。 [First Embodiment]
(Constitution)
1 to 5 show a first embodiment of the present invention. FIG. 1 is a diagram showing an overall schematic configuration of an endoscope 1 according to the present embodiment. As shown in the drawing, the endoscope 1 includes an insertion portion 2, an operation portion 3, and a universal cord 4. The insertion portion 2 is provided with an elongated flexible tube portion 5, a bending portion 6, and a distal end hard portion 7. The insertion portion 2 is covered with a resin such as polyurethane, the rear end portion is connected to the operation portion 3, and the connection portion is protected by a bend preventing member 8.

また、湾曲部６は、軟らかい弾性体で被覆されている。この湾曲部６の先端には先端硬質部７が設けられており、この先端面には図示しない観察光学系、撮像素子、照明光学系、送気送水ノズル、鉗子口出口などが設けられている。
操作部３には、吸引を行う際に使用する吸引制御装置９、送気送水を行う際に操作する送気送水バルブ１０、さらに撮像素子から出力された映像信号を処理するためのリモートスイッチ１１が取り付けられている。さらに操作部３には、樹脂製の上下アングルノブ１２ａおよび左右アングルノブ１２ｂが取り付けられている。上下アングルノブ１２ａを操作することによって湾曲部６を上下方向に、また左右アングルノブ１２ｂを操作することによって湾曲部６を左右方向に湾曲させることができる。なお、湾曲部６を湾曲固定状態に保ったり、湾曲固定状態を開放するときに使用する樹脂製のＦＥレバー１３ａ、１３ｂも取り付けられている。 The bending portion 6 is covered with a soft elastic body. A distal end hard portion 7 is provided at the distal end of the curved portion 6, and an observation optical system, an imaging device, an illumination optical system, an air / water feeding nozzle, a forceps port outlet, and the like (not shown) are provided on the distal end surface. .
The operation unit 3 includes a suction control device 9 used when performing suction, an air / water supply valve 10 operated when performing air / water supply, and a remote switch 11 for processing a video signal output from the image sensor. Is attached. Further, a resin-made vertical angle knob 12 a and left and right angle knob 12 b are attached to the operation unit 3. The bending portion 6 can be bent in the vertical direction by operating the vertical angle knob 12a, and the bending portion 6 can be bent in the horizontal direction by operating the left and right angle knob 12b. Resin-made FE levers 13a and 13b that are used when the bending portion 6 is kept in the curved fixed state or when the curved fixed state is released are also attached.

操作部３に接続されたユニバーサルコード４はポリウレタン等の樹脂で被覆されており、その先端にはコネクタ１４が取り付けられている。コネクタ１４には高周波漏れ電流を焼灼電源に戻すためのＳクチガネ１５と、図示されていない送水タンクに接続して送水を行うための金属製の送水口金１６と、図示されていない吸引ポンプが接続される金属製の吸引口金１７と、複数の電気接点１８と、ライトガイドの端部１９と、送気を行うための金属製の送気管２０などが設けられている。コネクタ１４のライトガイドの端部１９を図示しない光源装置のコネクタ受けに接続することによって先端硬質部の照明光学系から照明光が照射される。さらにコネクタ１４の側面には、電気コネクタ部２１が設けられており、この部分に図示しない接続コードを接続して図示しないビデオプロセッサと接続することで、撮像素子から出力された電気信号を図示しないモニタ上に映像として映し出せる。 The universal cord 4 connected to the operation unit 3 is covered with a resin such as polyurethane, and a connector 14 is attached to the tip thereof. The connector 14 includes an S cuttet 15 for returning high-frequency leakage current to the ablation power source, a metal water supply base 16 for connecting to a water supply tank (not shown) and supplying water, and a suction pump (not shown). A metal suction cap 17 to be connected, a plurality of electrical contacts 18, an end portion 19 of the light guide, a metal air pipe 20 for supplying air, and the like are provided. By connecting the end portion 19 of the light guide of the connector 14 to a connector receiver of a light source device (not shown), illumination light is emitted from the illumination optical system at the distal end hard portion. Further, an electrical connector portion 21 is provided on the side surface of the connector 14. A connection cord (not shown) is connected to this portion and connected to a video processor (not shown), so that an electrical signal output from the image sensor is not shown. Can be displayed as a video on the monitor.

内視鏡１の操作部３の下部には内視鏡１を把持するためのポリサルフォンなどの硬い樹脂で形成されたグリップ２２が設けられている。さらに、グリップ２２と挿入部２の折れ止め部材８との間には図２で示される連結部２２ａが設けられている。この連結部２２ａには鉗子等の処置具を挿通させるための鉗子口２３が設けられている。鉗子口２３にはシリコンゴムなどの弾性体で形成される鉗子栓２４が取り付けられる構造になっている。 A grip 22 formed of a hard resin such as polysulfone for gripping the endoscope 1 is provided at a lower portion of the operation unit 3 of the endoscope 1. Further, a connecting portion 22 a shown in FIG. 2 is provided between the grip 22 and the anti-bending member 8 of the insertion portion 2. The connection portion 22a is provided with a forceps port 23 for inserting a treatment tool such as forceps. A forceps plug 24 made of an elastic material such as silicon rubber is attached to the forceps port 23.

また、連結部２２ａには、主筒部２２ａ１とこの主筒部２２ａ１から挿入部２の軸方向に対して斜め後方に向けて突出された分岐筒部２２ａ２とが設けられている。分岐筒部２２ａ２内には、処置具を導入する略筒状のチャンネル口金（処置具挿入口体）２５が配置されている。このチャンネル口金２５の外端部に前記鉗子口２３が形成されている。チャンネル口金２５の外周にはＯリング２６，２７を嵌め込み、このＯリング２６，２７により分岐筒部２２ａ２とチャンネル口金２５の間をシールする。チャンネル口金２５の組み付け位置はキー状のピン部材２８により定められるようになっている。 The connecting portion 22a is provided with a main tube portion 22a1 and a branch tube portion 22a2 protruding from the main tube portion 22a1 obliquely rearward with respect to the axial direction of the insertion portion 2. A substantially cylindrical channel base (treatment instrument insertion port) 25 for introducing a treatment instrument is disposed in the branch cylinder portion 22a2. The forceps port 23 is formed at the outer end of the channel cap 25. O-rings 26 and 27 are fitted on the outer periphery of the channel base 25, and the O-rings 26 and 27 seal between the branch tube portion 22 a 2 and the channel base 25. The assembly position of the channel cap 25 is determined by a key-shaped pin member 28.

内視鏡１のグリップ２２および連結部２２ａの内部には、図示しないアングル操作用ワイヤー、送気用チャンネル、送水用チャンネル、撮像素子からの出力信号伝達用の電気ケーブルなどの内装物が組み込まれている。グリップ２２および連結部２２ａの内部にはこれら内装物の保護と他の部材の保持などを目的としたアルミニウム合金製の円筒部材（筒状部材）２９が設けられている。図３に示すように円筒部材２９には長方形の開口部である円筒部材開口部３０が設けられる。この円筒部材２９は、グリップ２２の内部に設けられた図示しない金属製の固定用フレームに金属製の継ぎ板とネジで固定されている。 Inside the grip 22 and the connecting portion 22a of the endoscope 1, interiors such as an angle operation wire (not shown), an air supply channel, a water supply channel, and an electric cable for transmitting an output signal from the image sensor are incorporated. ing. A cylindrical member (cylindrical member) 29 made of an aluminum alloy is provided inside the grip 22 and the connecting portion 22a for the purpose of protecting these interior items and holding other members. As shown in FIG. 3, the cylindrical member 29 is provided with a cylindrical member opening 30 which is a rectangular opening. The cylindrical member 29 is fixed to a metal fixing frame (not shown) provided inside the grip 22 with a metal joint plate and screws.

また、円筒部材２９の内部には、分岐部材３１が配置されている。この分岐部材３１は、円筒部材２９の軸方向に開通する第１の通路３１ａと、円筒部材２９の軸方向以外の方向に開通する第２の通路３１ｂと、これら第１の通路３１ａと第２の通路３１ｂとの連通部３１ｃとを有する。そして、この分岐部材３１の内部には、第１の通路３１ａと、第２の通路３１ｂと、連通部３１ｃとによって三股状に分岐したほぼＹ字状の３つの分岐通路が形成されている。ここで、第１の通路３１ａの先端側には、第１の連結孔であるチャンネル孔３１ａ１、第１の通路３１ａの基端側には、第２の連結孔である吸引孔３１ａ２がそれぞれ形成されている。さらに、第２の通路３１ｂの先端には第３の連結孔である導入孔３１ａ３が形成されている。 A branch member 31 is disposed inside the cylindrical member 29. The branch member 31 includes a first passage 31a opened in the axial direction of the cylindrical member 29, a second passage 31b opened in a direction other than the axial direction of the cylindrical member 29, and the first passage 31a and the second passage 31b. And a communication portion 31c with the passage 31b. The branch member 31 has three substantially Y-shaped branch passages that are branched into three forks by the first passage 31a, the second passage 31b, and the communication portion 31c. Here, a channel hole 31a1 that is a first connection hole is formed on the distal end side of the first passage 31a, and a suction hole 31a2 that is a second connection hole is formed on the proximal end side of the first passage 31a. Has been. Furthermore, an introduction hole 31a3 that is a third connection hole is formed at the tip of the second passage 31b.

第１の通路３１ａの先端側のチャンネル孔３１ａ１には、挿入部２内に配設された処置具挿通チャンネル３２のチャンネルチューブの基端部が連結されている。第１の通路３１ａの基端側の吸引孔３１ａ２には、吸引通路３３の吸引パイプの先端部が接続されている。この吸引パイプは操作部３およびユニバーサルコード４内を通してコネクタ１４側に延出され、吸引口金１７に接続されている。さらに、第２の通路３１ｂの先端の導入孔３１ａ３には、チャンネル口金２５の基端部が連結される。 The proximal end portion of the channel tube of the treatment instrument insertion channel 32 disposed in the insertion portion 2 is connected to the channel hole 31a1 on the distal end side of the first passage 31a. The tip of the suction pipe of the suction passage 33 is connected to the suction hole 31a2 on the proximal end side of the first passage 31a. The suction pipe extends to the connector 14 side through the operation unit 3 and the universal cord 4 and is connected to the suction cap 17. Further, the proximal end portion of the channel base 25 is connected to the introduction hole 31a3 at the distal end of the second passage 31b.

また、分岐部材３１は、金属材料で形成された一体のブロック部材（分岐部材本体）３４を有する。このブロック部材３４は、例えば、ＭＩＭ（メタルインジェクションモールディング：金属粉末射出成形）によって一体成形されている。
円筒部材２９には、円筒部材開口部３０の前縁にほぼＬ字状に屈曲された突当て部３５が形成されている。さらに、円筒部材２９には、円筒部材開口部３０の側面から円筒部材２９の軸方向と交差する方向へ延出され、分岐部材３１を挟持する一対の挟持片３６ａ，３６ｂを有する受け部３６が形成されている。 The branch member 31 has an integral block member (branch member main body) 34 formed of a metal material. The block member 34 is integrally formed by, for example, MIM (metal injection molding: metal powder injection molding).
The cylindrical member 29 is formed with an abutting portion 35 bent in a substantially L shape at the front edge of the cylindrical member opening 30. Further, the cylindrical member 29 has a receiving portion 36 having a pair of clamping pieces 36 a and 36 b extending from the side surface of the cylindrical member opening 30 in a direction intersecting the axial direction of the cylindrical member 29 and sandwiching the branch member 31. Is formed.

また、分岐部材３１の先端面には、円筒部材２９の突当て部３５と係合可能な係合溝３７が形成されている。そして、図４に示すようにこの係合溝３７に円筒部材２９の突当て部３５が差し込まれて係合されることにより、分岐部材３１が円筒部材２９の突当て部３５と当接して円筒部材２９の軸方向に沿う分岐部材３１の移動を規制するようになっている。 Further, an engaging groove 37 that can engage with the abutting portion 35 of the cylindrical member 29 is formed on the distal end surface of the branching member 31. Then, as shown in FIG. 4, the abutting portion 35 of the cylindrical member 29 is inserted into and engaged with the engaging groove 37, so that the branch member 31 comes into contact with the abutting portion 35 of the cylindrical member 29 and is cylindrical. The movement of the branch member 31 along the axial direction of the member 29 is restricted.

さらに、分岐部材３１の側面には、円筒部材２９の挟持片３６ａ，３６ｂとの接触部位に貫通孔３８が形成されている。分岐部材３１の側面には、この貫通孔３８の両端部によって分岐部材３１の第１凹部が形成されている。
また、図３に示すように円筒部材２９の受け部３６には、２つの挟持片３６ａ，３６ｂにおける分岐部材３１の貫通孔３８と対応する部位にスプリングピン３９の係合穴４０が形成されている。そして、挟持片３６ａ，３６ｂの係合穴４０間に受け部３６の第２凸部であるスプリングピン３９の両端部が嵌合されている。これにより、２つの挟持片３６ａ，３６ｂ間に架設された状態でスプリングピン３９が固定されている。そして、図５に示すようにこのスプリングピン３９は、分岐部材３１の貫通孔３８に挿通された状態で係止されることで、分岐部材３１の側面に設けられた第１凹部である貫通孔３８と受け部３６の第２凸部である挟持片３６ａ，３６ｂ間のスプリングピン３９との間が係脱可能に係合される。この分岐部材３１の貫通孔３８と受け部３６の挟持片３６ａ，３６ｂ間のスプリングピン３９とによって受け部３６と分岐部材３１との間を係脱可能に係合する係合部４１が形成されている。 Further, a through hole 38 is formed in a side surface of the branch member 31 at a contact portion with the sandwiching pieces 36 a and 36 b of the cylindrical member 29. A first recess of the branch member 31 is formed on the side surface of the branch member 31 by both end portions of the through hole 38.
Further, as shown in FIG. 3, the receiving portion 36 of the cylindrical member 29 has an engagement hole 40 for the spring pin 39 formed in a portion corresponding to the through hole 38 of the branching member 31 in the two clamping pieces 36a and 36b. Yes. And the both ends of the spring pin 39 which is the 2nd convex part of the receiving part 36 are fitted between the engagement holes 40 of the clamping pieces 36a and 36b. As a result, the spring pin 39 is fixed in a state where it is installed between the two sandwiching pieces 36a, 36b. As shown in FIG. 5, the spring pin 39 is locked in a state where the spring pin 39 is inserted into the through hole 38 of the branching member 31, so that the through hole is a first recess provided on the side surface of the branching member 31. 38 and the spring pin 39 between the holding pieces 36a and 36b, which are the second convex portions of the receiving portion 36, are engaged with each other in a detachable manner. An engaging portion 41 that removably engages between the receiving portion 36 and the branching member 31 is formed by the through hole 38 of the branching member 31 and the spring pin 39 between the holding pieces 36a and 36b of the receiving portion 36. ing.

（作用）
次に、上記構成の作用について説明する。本実施の形態の内視鏡１の製造時に、挿入部２の基端側に延設される円筒部材２９に分岐部材３１を組み付ける作業時には、円筒部材２９の円筒部材開口部３０の前縁の突当て部３５に分岐部材３１の先端面の係合溝３７を当接させることで、円筒部材２９の軸方向に沿う分岐部材３１の前方向への移動を規制する。さらに、円筒部材開口部３０の側面に配置された受け部３６の一対の挟持片３６ａ，３６ｂ間に分岐部材３１が挟持される。この一対の挟持片３６ａ，３６ｂ間に分岐部材３１が挟持される際に、挟持片３６ａ，３６ｂの係合穴４０間に受け部３６の第２凸部であるスプリングピン３９の両端部が嵌合されることにより、２つの挟持片３６ａ，３６ｂ間に架設された状態でスプリングピン３９が固定される。そして、このスプリングピン３９が分岐部材３１の貫通孔３８に挿通された状態で係止されることで、分岐部材３１の側面に設けられた第１凹部である貫通孔３８と受け部３６の第２凸部である挟持片３６ａ，３６ｂ間のスプリングピン３９との間が係脱可能に係合される。 (Function)
Next, the operation of the above configuration will be described. At the time of manufacturing the endoscope 1 according to the present embodiment, when the branch member 31 is assembled to the cylindrical member 29 extending to the proximal end side of the insertion portion 2, the front edge of the cylindrical member opening 30 of the cylindrical member 29 is By causing the engaging groove 37 on the front end surface of the branch member 31 to abut on the abutting portion 35, the forward movement of the branch member 31 along the axial direction of the cylindrical member 29 is restricted. Further, the branch member 31 is sandwiched between the pair of sandwiching pieces 36 a and 36 b of the receiving portion 36 disposed on the side surface of the cylindrical member opening 30. When the branch member 31 is sandwiched between the pair of sandwiching pieces 36a and 36b, both end portions of the spring pin 39, which is the second convex portion of the receiving portion 36, are fitted between the engagement holes 40 of the sandwiching pieces 36a and 36b. As a result, the spring pin 39 is fixed in a state of being spanned between the two sandwiching pieces 36a and 36b. The spring pin 39 is locked in a state where the spring pin 39 is inserted into the through hole 38 of the branch member 31, so that the through hole 38 that is the first recess provided on the side surface of the branch member 31 and the first portion of the receiving portion 36. The spring pins 39 between the sandwiching pieces 36a and 36b, which are two convex portions, are detachably engaged.

（効果）
そこで、上記構成のものにあっては次の効果を奏する。すなわち、本実施の形態の内視鏡１では、分岐部材３１の側面に設けられた第１凹部である貫通孔３８を利用してスプリングピン３９によって円筒部材２９に分岐部材３１を組み付けることができる。したがって、従来のように分岐部材３１にねじ穴を機械加工し、この分岐部材３１を円筒部材２９にねじ部材によってねじ締めするなどの追加の作業が不要になるので、従来に比べて円筒部材２９に分岐部材３１を組み付ける組立て作業が容易となる。さらに、分岐部材３１は、例えば、ＭＩＭ（メタルインジェクション：射出成形粉末冶金）によってブロック部材３４を一体成形することができるので、分岐部材３１のコスト低下を図ることができる。これにより、組立てが容易で、分岐部材３１の安価な取付け構造を具備した内視鏡１を提供することができる。 (effect)
Therefore, the above configuration has the following effects. That is, in the endoscope 1 of the present embodiment, the branch member 31 can be assembled to the cylindrical member 29 by the spring pin 39 using the through hole 38 that is the first recess provided in the side surface of the branch member 31. . Accordingly, since the screw hole is machined in the branch member 31 as in the prior art and the additional work such as screwing the branch member 31 to the cylindrical member 29 with the screw member is not required, the cylindrical member 29 is compared with the conventional case. The assembling work for assembling the branching member 31 to the top becomes easy. Furthermore, since the branch member 31 can integrally mold the block member 34 by, for example, MIM (metal injection: injection molding powder metallurgy), the cost of the branch member 31 can be reduced. Thereby, the endoscope 1 which is easy to assemble and has an inexpensive mounting structure for the branch member 31 can be provided.

［第２の実施の形態］
（構成）
図６および図７は、本発明の第２の実施の形態を示す。本実施の形態は、第１の実施の形態（図１乃至図５参照）の内視鏡１の円筒部材２９と分岐部材３１との間の連結構造を次の通り変更した変形例である。なお、図６および図７中で、図１乃至図５と同一部分には同一の符号を付してここではその説明を省略する。 [Second Embodiment]
(Constitution)
6 and 7 show a second embodiment of the present invention. The present embodiment is a modification in which the connection structure between the cylindrical member 29 and the branch member 31 of the endoscope 1 of the first embodiment (see FIGS. 1 to 5) is changed as follows. 6 and 7, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted here.

本実施の形態の内視鏡１は、円筒部材２９の挟持片３６ａ，３６ｂが弾性変形可能な板ばね状の部材によって形成されている。これらの挟持片３６ａ，３６ｂには、図６に示すように内方向に向けて突出成形部５１がそれぞれ突出成形されている。そして、各挟持片３６ａ，３６ｂの突出成形部５１によってスナップフィット爪部を構成する受け部３６の第２凸部が形成されている。 In the endoscope 1 of the present embodiment, the sandwiching pieces 36a and 36b of the cylindrical member 29 are formed by a plate spring-like member that can be elastically deformed. As shown in FIG. 6, projecting portions 51 are projectingly formed on these sandwiching pieces 36a and 36b inward. And the 2nd convex part of the receiving part 36 which comprises a snap fit nail | claw part is formed by the protrusion shaping | molding part 51 of each clamping piece 36a, 36b.

また、本実施の形態の分岐部材３１は、第１の実施の形態と同一構成になっている。そして、分岐部材３１の貫通孔３８の両端部によって分岐部材３１の第１凹部が形成されている。これにより、図７に示すように各挟持片３６ａ，３６ｂの突出成形部５１が分岐部材３１の貫通孔３８の両端部に挿通された状態で係止されることで、分岐部材３１の側面に設けられた第１凹部である貫通孔３８と受け部３６の各挟持片３６ａ，３６ｂの突出成形部５１との間が係脱可能に係合される。この分岐部材３１の貫通孔３８と受け部３６の各挟持片３６ａ，３６ｂの突出成形部５１とによって受け部３６と分岐部材３１との間を係脱可能に係合する係合部５２が形成されている。 Further, the branching member 31 of the present embodiment has the same configuration as that of the first embodiment. A first recess of the branch member 31 is formed by both end portions of the through hole 38 of the branch member 31. As a result, as shown in FIG. 7, the protruding molded portions 51 of the sandwiching pieces 36 a and 36 b are locked in a state of being inserted into both end portions of the through holes 38 of the branch member 31, thereby The through hole 38 which is the first recess provided and the projecting molding portion 51 of each of the sandwiching pieces 36a and 36b of the receiving portion 36 are engaged with each other in a detachable manner. An engaging portion 52 that removably engages between the receiving portion 36 and the branching member 31 is formed by the through hole 38 of the branching member 31 and the projecting molding portion 51 of each sandwiching piece 36a, 36b of the receiving portion 36. Has been.

（作用）
次に、上記構成の作用について説明する。本実施の形態では、挿入部２の基端側に延設される円筒部材２９に分岐部材３１を組み付ける作業時には、円筒部材２９の円筒部材開口部３０の前縁の突当て部３５に分岐部材３１の先端面の係合溝３７を当接させることで、円筒部材２９の軸方向に沿う分岐部材３１の前方向への移動を規制する。さらに、円筒部材開口部３０の側面に配置された受け部３６の一対の挟持片３６ａ，３６ｂ間に分岐部材３１が挟持される。このとき、一対の挟持片３６ａ，３６ｂ間に分岐部材３１が挟持される際に、受け部３６の第２凸部を形成する突出成形部５１が分岐部材３１と当接することで、一対の挟持片３６ａ，３６ｂの板ばね部材が弾性変形しながら受け部３６の突出成形部５１が分岐部材３１の側壁を乗り越えて貫通孔３８に挿入される。これにより、分岐部材３１の貫通孔３８と受け部３６の突出成形部５１との間が係脱可能に係合される。 (Function)
Next, the operation of the above configuration will be described. In the present embodiment, at the time of assembling the branch member 31 to the cylindrical member 29 extending to the proximal end side of the insertion portion 2, the branch member is placed on the abutting portion 35 on the front edge of the cylindrical member opening 30 of the cylindrical member 29. By causing the engagement groove 37 on the front end surface of 31 to abut, the movement of the branch member 31 in the axial direction of the cylindrical member 29 is restricted. Further, the branch member 31 is sandwiched between the pair of sandwiching pieces 36 a and 36 b of the receiving portion 36 disposed on the side surface of the cylindrical member opening 30. At this time, when the branching member 31 is sandwiched between the pair of sandwiching pieces 36a and 36b, the protruding molded portion 51 that forms the second convex portion of the receiving portion 36 comes into contact with the branching member 31 so that the pair of sandwiching While the leaf spring members of the pieces 36 a and 36 b are elastically deformed, the protruding molded portion 51 of the receiving portion 36 gets over the side wall of the branch member 31 and is inserted into the through hole 38. Thereby, between the through-hole 38 of the branch member 31 and the protrusion molding part 51 of the receiving part 36 is engaged so that engagement / disengagement is possible.

（効果）
そこで、上記構成のものにあっては次の効果を奏する。すなわち、本実施の形態の内視鏡１では、一対の挟持片３６ａ，３６ｂの弾性変形を利用して分岐部材３１の側面に設けられた第１凹部である貫通孔３８に一対の挟持片３６ａ，３６ｂの各突出成形部５１を挿入させることで、円筒部材２９に分岐部材３１を組み付けることができる。そのため、本実施の形態でも第１実施形態と同様に従来のように分岐部材３１にねじ穴を機械加工し、この分岐部材３１を円筒部材２９にねじ部材によってねじ締めするなどの追加の作業が不要になるので、従来に比べて円筒部材２９に分岐部材３１を組み付ける組立て作業が容易となる。さらに、分岐部材３１は、例えば、ＭＩＭ（メタルインジェクション：射出成形粉末冶金）によってブロック部材３４を一体成形することができるので、分岐部材３１のコスト低下を図ることができる。これにより、組立てが容易で、分岐部材３１の安価な取付け構造を具備した内視鏡１を提供することができる。 (effect)
Therefore, the above configuration has the following effects. That is, in the endoscope 1 according to the present embodiment, the pair of sandwiching pieces 36a is inserted into the through hole 38 that is the first recess provided on the side surface of the branching member 31 by using the elastic deformation of the pair of sandwiching pieces 36a and 36b. 36b, the branch member 31 can be assembled to the cylindrical member 29. For this reason, in this embodiment as well as the first embodiment, an additional operation such as machining a screw hole in the branch member 31 and screwing the branch member 31 to the cylindrical member 29 with a screw member as in the prior art is performed. Since it becomes unnecessary, the assembling work for assembling the branching member 31 to the cylindrical member 29 becomes easier than in the prior art. Furthermore, since the branch member 31 can integrally mold the block member 34 by, for example, MIM (metal injection: injection molding powder metallurgy), the cost of the branch member 31 can be reduced. Thereby, the endoscope 1 which is easy to assemble and has an inexpensive mounting structure for the branch member 31 can be provided.

なお、本実施の形態では、一対の挟持片３６ａ，３６ｂが板ばね部材によって形成されている構成を示したが、一対の挟持片３６ａ，３６ｂのいずれか一方のみが板ばね部材によって形成されている構成にしてもよい。
［第２の実施の形態の第１の変形例］
（構成）
図８は、本発明の第２の実施の形態の第１の変形例を示す。本変形例は、第１の実施の形態（図１乃至図５参照）の内視鏡１の円筒部材２９と分岐部材３１との間の連結構造を次の通り変更した変形例である。なお、図８中で、図１乃至図５と同一部分には同一の符号を付してここではその説明を省略する。 In the present embodiment, the pair of sandwiching pieces 36a and 36b is configured by the leaf spring member. However, only one of the pair of sandwiching pieces 36a and 36b is formed by the leaf spring member. You may make it the structure which is.
[First Modification of Second Embodiment]
(Constitution)
FIG. 8 shows a first modification of the second embodiment of the present invention. This modification is a modification in which the connection structure between the cylindrical member 29 and the branching member 31 of the endoscope 1 according to the first embodiment (see FIGS. 1 to 5) is changed as follows. In FIG. 8, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted here.

すなわち、本変形例は、円筒部材２９の挟持片３６ａ，３６ｂが弾性変形可能な板ばね状の部材によって形成されている。各挟持片３６ａ，３６ｂには、図８に示すように１つの穴部６１がそれぞれ形成されている。そして、各挟持片３６ａ，３６ｂの穴部６１によって受け部３６の第２凹部が形成されている。 That is, in this modification, the sandwiching pieces 36a and 36b of the cylindrical member 29 are formed by a plate spring-like member that can be elastically deformed. As shown in FIG. 8, one hole 61 is formed in each of the sandwiching pieces 36a and 36b. And the 2nd recessed part of the receiving part 36 is formed of the hole part 61 of each clamping piece 36a, 36b.

また、本実施の形態の分岐部材３１の両側面には、円筒部材２９の挟持片３６ａ，３６ｂとの接触部位に外向きに突出する第１凸部６２がそれぞれ形成されている。そして、分岐部材３１の両側面の第１凸部６２によってスナップフィット爪部が構成されている。 Moreover, the 1st convex part 62 which protrudes outward is formed in the contact part with the clamping pieces 36a and 36b of the cylindrical member 29 in the both sides | surfaces of the branch member 31 of this Embodiment, respectively. And the snap fitting nail | claw part is comprised by the 1st convex part 62 of the both sides | surfaces of the branch member 31. FIG.

本変形例では、図８に示すように各挟持片３６ａ，３６ｂの穴部６１に分岐部材３１の両側面の第１凸部６２が挿通された状態で係止されることで、分岐部材３１の両側面の第１凸部６２と受け部３６の各挟持片３６ａ，３６ｂの穴部６１との間が係脱可能に係合される。この分岐部材３１の両側面の第１凸部６２と受け部３６の各挟持片３６ａ，３６ｂの穴部６１とによって受け部３６と分岐部材３１との間を係脱可能に係合する係合部６３が形成されている。 In this modified example, as shown in FIG. 8, the branching member 31 is locked by the first protrusions 62 on both side surfaces of the branching member 31 being inserted into the holes 61 of the sandwiching pieces 36 a and 36 b. The first protrusions 62 on both side surfaces of the receiving portion 36 and the hole portions 61 of the holding pieces 36a and 36b of the receiving portion 36 are detachably engaged. Engagement in which the receiving portion 36 and the branching member 31 are detachably engaged by the first convex portions 62 on both side surfaces of the branching member 31 and the hole portions 61 of the sandwiching pieces 36a and 36b of the receiving portion 36. A portion 63 is formed.

（作用・効果）
本変形例では、分岐部材３１の第１凸部６２が一対の挟持片３６ａ，３６ｂと当接することで、一対の挟持片３６ａ，３６ｂが弾性変形しながら分岐部材３１の第１凸部６２が挟持片３６ａ，３６ｂの穴部６１に挿入される。このように一対の挟持片３６ａ，３６ｂの弾性変形を利用して各挟持片３６ａ，３６ｂの穴部６１に分岐部材３１の両側面の第１凸部６２を挿入させることで、円筒部材２９に分岐部材３１を組み付けることができる。そのため、本変形例でも第１実施形態と同様に従来のように分岐部材３１にねじ穴を機械加工し、この分岐部材３１を円筒部材２９にねじ部材によってねじ締めするなどの追加の作業が不要になるので、従来に比べて円筒部材２９に分岐部材３１を組み付ける組立て作業が容易となる。さらに、本変形例でも分岐部材３１の両側面の第１凸部６２は、例えば、ＭＩＭ（メタルインジェクション：射出成形粉末冶金）によって分岐部材３１のブロック部材３４に一体成形することができるので、分岐部材３１のコスト低下を図ることができる。これにより、組立てが容易で、分岐部材３１の安価な取付け構造を具備した内視鏡１を提供することができる。 (Action / Effect)
In the present modification, the first convex portion 62 of the branching member 31 comes into contact with the pair of sandwiching pieces 36a and 36b, so that the first convex portion 62 of the branching member 31 is elastically deformed while the pair of sandwiching pieces 36a and 36b are elastically deformed. It is inserted into the hole 61 of the sandwiching pieces 36a, 36b. Thus, the cylindrical member 29 is inserted into the cylindrical member 29 by inserting the first convex portions 62 on both side surfaces of the branching member 31 into the hole portions 61 of the sandwiching pieces 36a and 36b by using the elastic deformation of the pair of sandwiching pieces 36a and 36b. The branch member 31 can be assembled. Therefore, in this modification as well as the first embodiment, an additional operation such as machining a screw hole in the branch member 31 and screwing the branch member 31 to the cylindrical member 29 with a screw member as in the prior art is unnecessary. Therefore, the assembling work for assembling the branch member 31 to the cylindrical member 29 is facilitated as compared with the conventional case. Further, in the present modification as well, the first protrusions 62 on both side surfaces of the branch member 31 can be integrally formed on the block member 34 of the branch member 31 by, for example, MIM (metal injection: injection molding powder metallurgy). The cost of the member 31 can be reduced. Thereby, the endoscope 1 which is easy to assemble and has an inexpensive mounting structure for the branch member 31 can be provided.

［第２の実施の形態の第２の変形例］
（構成）
図９は、本発明の第２の実施の形態の第２の変形例を示す。本変形例は、上記第１の変形例の各挟持片３６ａ，３６ｂの穴部６１に代えて各挟持片３６ａ，３６ｂに外方向に向けて突出成形された突出成形部７１を形成したものである。そして、各挟持片３６ａ，３６ｂの突出成形部７１の内面側の凹部７２に分岐部材３１の両側面の第１凸部６２が挿通された状態で係止されることで、分岐部材３１の両側面の第１凸部６２と受け部３６の各挟持片３６ａ，３６ｂの突出成形部７１の内面側の凹部７２との間が係脱可能に係合される。この分岐部材３１の両側面の第１凸部６２と受け部３６の各挟持片３６ａ，３６ｂの突出成形部７１の内面側の凹部７２とによって受け部３６と分岐部材３１との間を係脱可能に係合する係合部７３が形成されている。 [Second Modification of Second Embodiment]
(Constitution)
FIG. 9 shows a second modification of the second embodiment of the present invention. In this modification, instead of the hole 61 of each sandwiching piece 36a, 36b of the first modification, a projecting molding part 71 is formed by projecting outward from each sandwiching piece 36a, 36b. is there. Then, the first projecting portions 62 on both side surfaces of the branching member 31 are engaged with the recesses 72 on the inner surface side of the projecting molding portions 71 of the sandwiching pieces 36a and 36b in a state where the first projecting portions 62 are inserted through the both sides of the branching member 31. The first convex portion 62 on the surface and the concave portion 72 on the inner surface side of the projecting molding portion 71 of each of the holding pieces 36a and 36b of the receiving portion 36 are detachably engaged. The first projecting portion 62 on both side surfaces of the branching member 31 and the recess 72 on the inner surface side of the protruding molded portion 71 of each clamping piece 36a, 36b of the receiving portion 36 are engaged and disengaged between the receiving portion 36 and the branching member 31. An engaging portion 73 that engages with each other is formed.

（作用・効果）
本変形例では、分岐部材３１の第１凸部６２が一対の挟持片３６ａ，３６ｂと当接することで、一対の挟持片３６ａ，３６ｂが弾性変形しながら分岐部材３１の第１凸部６２が挟持片３６ａ，３６ｂの突出成形部７１の内面側の凹部７２に挿入される。本変形例でも一対の挟持片３６ａ，３６ｂの弾性変形を利用して各挟持片３６ａ，３６ｂの穴部６１に分岐部材３１の両側面の第１凸部６２を挿入させることで、円筒部材２９に分岐部材３１を組み付けることができる。そのため、本変形例でも第１実施形態と同様の効果が得られる。 (Action / Effect)
In the present modification, the first convex portion 62 of the branching member 31 comes into contact with the pair of sandwiching pieces 36a and 36b, so that the first convex portion 62 of the branching member 31 is elastically deformed while the pair of sandwiching pieces 36a and 36b are elastically deformed. The sandwiching pieces 36a and 36b are inserted into the recesses 72 on the inner surface side of the projecting molding portion 71. Also in this modified example, the cylindrical member 29 is inserted by inserting the first convex portions 62 on both side surfaces of the branching member 31 into the hole portions 61 of the sandwiching pieces 36a and 36b by using the elastic deformation of the pair of sandwiching pieces 36a and 36b. The branching member 31 can be assembled to. Therefore, the same effect as that of the first embodiment can be obtained in this modification.

［第３の実施の形態］
（構成）
図１０乃至図１２は、本発明の第３の実施の形態を示す。本実施の形態は第１の実施の形態（図１乃至図５参照）の内視鏡１の円筒部材２９と分岐部材３１との間の連結構造を次の通り変更した変形例である。なお、図１０乃至図１２中で、図１乃至図５と同一部分には同一の符号を付してここではその説明を省略する。 [Third Embodiment]
(Constitution)
10 to 12 show a third embodiment of the present invention. The present embodiment is a modification in which the connection structure between the cylindrical member 29 and the branch member 31 of the endoscope 1 of the first embodiment (see FIGS. 1 to 5) is changed as follows. 10 to 12, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted here.

本実施の形態の内視鏡１は、図１０に示すように円筒部材２９の円筒部材開口部３０の両側面から円筒部材２９の内部側に突設された一対の挟持片８１ａ，８１ｂを有する受け部８１が形成されている。各挟持片８１ａ，８１ｂには、図１１に示すようにほぼＬ字状に屈曲された屈曲部が形成され、この屈曲部によって円筒部材２９の軸方向に延設されたレール（第３凸部）８２が形成されている。各レール８２の基端部には、係止用の突起部（スナップフィット）８３が内向きに突設されている。 The endoscope 1 according to the present embodiment includes a pair of sandwiching pieces 81a and 81b protruding from both side surfaces of the cylindrical member opening 30 of the cylindrical member 29 to the inside of the cylindrical member 29 as shown in FIG. A receiving portion 81 is formed. As shown in FIG. 11, each sandwiching piece 81a, 81b is formed with a bent portion bent in an approximately L shape, and a rail (third protruding portion) extending in the axial direction of the cylindrical member 29 by the bent portion. ) 82 is formed. At the base end of each rail 82, a locking projection (snap fit) 83 projects inwardly.

また、分岐部材３１の両側面には、一対の挟持片８１ａ，８１ｂの各レール８２と係合する溝部（第４凹部）８４が形成されている。さらに、図１２に示すように分岐部材３１の両側面の溝部８４の基端部（終端位置）には、分岐部材３１の内方向に一段深く形成された凹部８５が形成されている。 Further, groove portions (fourth concave portions) 84 that engage with the rails 82 of the pair of sandwiching pieces 81 a and 81 b are formed on both side surfaces of the branch member 31. Furthermore, as shown in FIG. 12, a recess 85 is formed in the base end portion (terminal position) of the groove portion 84 on both side surfaces of the branch member 31 and is formed one step deeper inward of the branch member 31.

そして、本実施の形態では分岐部材３１の溝部８４に挟持片８１ａ，８１ｂの各レール８２が差し込まれ、終端位置で各レール８２の基端部の係止用の突起部８３が溝部８４の凹部８５に嵌合されて係合されることで、分岐部材３１の両側面の溝部８４と受け部８１の挟持片８１ａ，８１ｂの各レール８２との間が係脱可能に係合される。この分岐部材３１の両側面の溝部８４の凹部８５と受け部８１の挟持片８１ａ，８１ｂの各レール８２の突起部８３とによって受け部８１と分岐部材３１との間を係脱可能に係合する係合部８６が形成されている。 In this embodiment, the rails 82 of the sandwiching pieces 81 a and 81 b are inserted into the groove 84 of the branching member 31, and the locking projection 83 of the base end of each rail 82 is the recess of the groove 84 at the terminal position. By being fitted and engaged with 85, the groove portions 84 on both side surfaces of the branching member 31 and the rails 82 of the sandwiching pieces 81a and 81b of the receiving portion 81 are detachably engaged. The receiving portion 81 and the branching member 31 are detachably engaged with each other by the concave portions 85 of the groove portions 84 on both side surfaces of the branching member 31 and the projections 83 of the rails 82 of the holding pieces 81a and 81b of the receiving portion 81. An engaging portion 86 is formed.

（作用）
次に、上記構成の作用について説明する。本実施の形態の挿入部２の基端側に延設される円筒部材２９に分岐部材３１を組み付ける作業時には、円筒部材開口部３０の前縁の突当て部３５に分岐部材３１の係合溝３７を当接させることで、円筒部材２９の軸方向に沿う分岐部材３１の前方向への移動を規制するとともに、開口部３０の側面に配置された受け部８１の一対の挟持片８１ａ，８１ｂ間に分岐部材３１が挟持される。この一対の挟持片８１ａ，８１ｂ間に分岐部材３１が挟持される際に、一対の挟持片８１ａ，８１ｂのレール８２が分岐部材３１の溝部８４に差し込まれ、終端位置で各レール８２の基端部の係止用の突起部８３が溝部８４の凹部８５に嵌合されて係合されることで、受け部８１と分岐部材３１との間が係脱可能に係合される。 (Function)
Next, the operation of the above configuration will be described. At the time of assembling the branch member 31 to the cylindrical member 29 extending to the base end side of the insertion portion 2 of the present embodiment, the engaging groove of the branch member 31 is formed in the abutting portion 35 on the front edge of the cylindrical member opening 30. 37 is abutted to restrict the forward movement of the branching member 31 along the axial direction of the cylindrical member 29, and the pair of sandwiching pieces 81 a and 81 b of the receiving portion 81 disposed on the side surface of the opening 30. The branch member 31 is sandwiched therebetween. When the branching member 31 is sandwiched between the pair of sandwiching pieces 81a and 81b, the rails 82 of the pair of sandwiching pieces 81a and 81b are inserted into the grooves 84 of the branching member 31, and the base ends of the rails 82 at the terminal positions. By engaging and engaging the projection 83 for locking the portion with the recess 85 of the groove 84, the receiving portion 81 and the branch member 31 are engaged with each other in a detachable manner.

（効果）
本実施の形態では、円筒部材２９の一対の挟持片８１ａ，８１ｂの弾性変形を利用して分岐部材３１の両側面の溝部８４に一対の挟持片８１ａ，８１ｂの各レール８２が差し込まれ、終端位置で各レール８２の基端部の係止用の突起部８３が溝部８４の凹部８５に嵌合されて係合されることで円筒部材２９に分岐部材３１を組み付けることができる。したがって、本実施の形態でも第１実施形態と同様に従来のように分岐部材３１にねじ穴を機械加工し、この分岐部材３１を円筒部材２９にねじ部材によってねじ締めするなどの追加の作業が不要になるので、従来に比べて円筒部材２９に分岐部材３１を組み付ける組立て作業が容易となる。さらに、分岐部材３１は、例えば、ＭＩＭ（メタルインジェクション：射出成形粉末冶金）によってブロック部材３４を一体成形することができるので、分岐部材３１のコスト低下を図ることができる。これにより、組立てが容易で、分岐部材３１の安価な取付け構造を具備した内視鏡１を提供することができる。 (effect)
In the present embodiment, the rails 82 of the pair of sandwiching pieces 81a and 81b are inserted into the groove portions 84 on both side surfaces of the branching member 31 using the elastic deformation of the pair of sandwiching pieces 81a and 81b of the cylindrical member 29, and the terminal ends. The branching member 31 can be assembled to the cylindrical member 29 by engaging and engaging the projection 83 for locking the base end of each rail 82 with the recess 85 of the groove 84 at the position. Therefore, in the present embodiment, as in the first embodiment, an additional operation such as machining a screw hole in the branching member 31 and screwing the branching member 31 to the cylindrical member 29 with a screw member is performed. Since it becomes unnecessary, the assembling work for assembling the branching member 31 to the cylindrical member 29 becomes easier than in the prior art. Furthermore, since the branch member 31 can integrally mold the block member 34 by, for example, MIM (metal injection: injection molding powder metallurgy), the cost of the branch member 31 can be reduced. Thereby, the endoscope 1 which is easy to assemble and has an inexpensive mounting structure for the branch member 31 can be provided.

さらに、本発明は上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々変形実施できることは勿論である。
次に、本出願の他の特徴的な技術事項を下記の通り付記する。
記
（付記項１）挿入部の基端側に延設される円筒部材と、前記円筒部材の側壁に設けられた開口部と、前記円筒部材の内部に取り付けられ、前記円筒部材の軸方向及び前記開口部方向に開通する分岐部材と、前記開口部の前縁に形成され、前記分岐部材が当接する突当て部と、前記開口部の側面から前記円筒部材の短手方向へ延出する、前記分岐部材を挟持する受け部と、前記受け部と前記分岐部材を係合する係合部と、を備えた内視鏡。 Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
Next, other characteristic technical matters of the present application are appended as follows.
Record
(Additional Item 1) A cylindrical member extending to the proximal end side of the insertion portion, an opening provided in a side wall of the cylindrical member, and attached to the inside of the cylindrical member, the axial direction of the cylindrical member and the A branching member that opens in the direction of the opening, a butting part that is formed on a front edge of the opening and that contacts the branching member, and extends from a side surface of the opening to the short side of the cylindrical member, An endoscope comprising: a receiving part that holds a branching member; and an engaging part that engages the receiving part and the branching member.

（付記項２）前記係合部は、前記分岐部材の側面に設けられた凹部と、前記凹部と係合する前記受け部に設けられた凸部と、を含んでなる付記項１記載の内視鏡。
（付記項３）前記受け部の軸方向に設けられたレールと、前記分岐部材に設けられた、前記レールと係合する溝部と、を含んでなる付記項１記載の内視鏡。 (Additional Item 2) The internal portion according to Additional Item 1, wherein the engaging portion includes a concave portion provided on a side surface of the branch member and a convex portion provided on the receiving portion that engages with the concave portion. Endoscope.
(Additional Item 3) The endoscope according to Additional Item 1, comprising a rail provided in the axial direction of the receiving portion and a groove portion provided in the branching member to engage with the rail.

本発明は、操作部のケーシング内に配設された筒状部材と、処置具挿通用チャンネルと操作部の処置具挿入口と吸引通路との間を連結する連結用の分岐部材とを備えた内視鏡の組立てが容易で、分岐部材の安価な取付け構造を具備した内視鏡を使用する技術分野や、これを製造する技術分野に有効である。 The present invention includes a cylindrical member disposed in the casing of the operation unit, and a branch member for connection that connects the treatment instrument insertion channel, the treatment instrument insertion port of the operation unit, and the suction passage. The endoscope can be easily assembled and is effective in a technical field using an endoscope having an inexpensive mounting structure for a branching member and a technical field for manufacturing the endoscope.

２…挿入部、２９…円筒部材（筒状部材）、３０…円筒部材開口部、３１ａ…第１の通路、３１ｂ…第２の通路、３１ｃ…連通部、３１…分岐部材、３５…突当て部、３６ａ，３６ｂ…挟持片、３６…受け部、３８…貫通孔、３９…スプリングピン、４１…係合部。 DESCRIPTION OF SYMBOLS 2 ... Insertion part, 29 ... Cylindrical member (tubular member), 30 ... Cylindrical member opening part, 31a ... 1st channel | path, 31b ... 2nd channel | path, 31c ... Communication part, 31 ... Branch member, 35 ... Butting 36a, 36b ... clamping piece, 36 ... receiving part, 38 ... through hole, 39 ... spring pin, 41 ... engaging part.

Claims

A tubular member extending to the proximal end side of the insertion portion;
An opening provided in a side wall of the tubular member;
A branching member that is disposed inside the tubular member and has a communicating portion with a first passage that opens in the axial direction of the tubular member and a second passage that opens in a direction other than the axial direction of the tubular member When,
An abutting portion that is formed at a front edge of the opening, and that abuts the branching member to restrict movement of the branching member along the axial direction of the tubular member;
A receiving portion having a pair of clamping pieces extending from a side surface of the opening portion in a direction intersecting the axial direction of the cylindrical member, and sandwiching the branch member;
An engaging portion that is provided at a contact portion between the receiving portion and the branch member, and engages and disengages between the receiving portion and the branch member;
Equipped with a,
The engaging portion is
Either one of the first concave portion or the first convex portion provided on the side surface of the branch member;
A second convex portion provided in the receiving portion and engaged with the first concave portion or a second concave portion engaged with the first convex portion;
An endoscope comprising:

Wherein the first recess of the branch members, endoscope according to claim 1 which is formed by the both end portions of the through hole of the branch member.

The endoscope according to claim 2 , wherein the receiving portion includes a spring pin that is locked in a state in which the second convex portion is inserted into the through hole of the branch member.

The receiving portion is formed by a leaf spring-like member in which at least one of the pair of sandwiching pieces can be elastically deformed,
Second convex portion of the receiving portion, endoscope according to claim 1 which is formed by the projecting molding portion that protrudes shaped toward the inner direction to the clamping piece.

The receiving portion is formed by a leaf spring-like member in which at least one of the pair of sandwiching pieces can be elastically deformed,
The second recess of the receiving portion, endoscope according to claim 1 which is formed by one of the recesses or holes in the inner surface side of the projection forming portion that protrudes shaped toward the outside direction in the clamping piece.

The engaging portion is
Rails extending in the axial direction of the cylindrical member on the pair of sandwiching pieces of the receiving portion;
A groove provided on the branch member and engaged with the rail;
The endoscope according to claim 1, comprising:

The receiving portion has a third convex portion extending in a direction intersecting the axial direction of the cylindrical member at the end portion of the rail,
The endoscope according to claim 6 , wherein the branch member is formed with a fourth concave portion that engages with the third convex portion of the rail in the groove portion.

The cylindrical member is formed by a cylindrical member provided in the casing of the operation unit,
The branch member has a branch member body formed of a metal material, and a proximal end portion of a treatment instrument insertion channel is connected to a distal end side of the first passage, and a proximal end side of the first passage. The endoscope according to claim 1, wherein a suction passage is connected to the second passage, and a treatment instrument insertion port body for introducing a treatment instrument to be inserted from a treatment instrument insertion port provided in the operation unit is connected to the second passage. mirror.