JP5161750B2 - Observation unit separation type treatment endoscope - Google Patents

Description

  The present invention relates to an observation unit separation type treatment endoscope that treats a site in a body cavity.

  Insert the endoscope and treatment instrument guide insertion tool into the body cavity using the overtube, and treat the affected part in the body cavity with the treatment tool guided into the body cavity with the treatment tool guide insertion tool while observing the inside of the body cavity with the endoscope An endoscopic treatment apparatus configured to do this is known (Japanese Patent Laid-Open No. 2000-325303). In this endoscope treatment apparatus, an endoscope including an imaging unit and a bending mechanism and a treatment instrument guide insertion tool including a bending mechanism are used in a state of being inserted into a common overtube. . Further, both the endoscope and the treatment instrument guide insertion tool include a bending mechanism that protrudes from the tip of the overtube and can move independently. The endoscope and the treatment instrument guide insertion tool are subjected to independent bending operations.

On the other hand, Japanese Patent Application Laid-Open No. 2005-95590 discloses an endoscope in which a treatment arm is provided at the distal end of an insertion portion provided with a bending portion.
JP 2000-325303 A JP 2005-095590 A

  In the endoscope treatment apparatus of Patent Document 1 described above, since the endoscope and the treatment instrument guide insertion tool are guided into the body cavity using an overtube, the endoscope and the treatment tool guide insertion tool are any of them. In the body cavity, an independent bending operation is performed individually and independently. For this reason, the cooperative operation of the endoscope and the treatment instrument guide insertion tool is difficult, and the burden on the operator with respect to the access to the treatment target site in the body cavity and the treatment operation is large.

  Further, in the endoscope disclosed in Patent Document 2, the treatment arm portion is provided at the distal end of the insertion portion, so that the configuration is more complicated than that of a normal observation endoscope. Therefore, the labor and time for cleaning, disinfection, and sterilization are enormous, and there is a problem that the work cost per treatment is increased.

  The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to improve the cleaning performance by reducing the burden on the operator as a method in which the observation unit part can be detached from the endoscope body. Another object is to provide a treatment endoscope.

The present invention is provided in an endoscope main body, an intracorporeal insertion portion provided with a main body bending portion at a distal end side portion,
One or more treatment arms having a bending mechanism that is connected to the distal end of the body cavity insertion portion and is bent;
A main body operation unit that is provided on the proximal end side of the body cavity insertion unit and has a first operation means for bending the main body bending unit;
An arm operation unit provided on the proximal end side of the body cavity insertion unit and having a second operation means for bending the treatment arm;
An observation unit having imaging means and signal transmission means for transmitting imaging signal data;
An observation unit attaching / detaching means provided in the body cavity insertion portion, wherein the observation unit is detachably attached to the body cavity insertion portion;
Equipped with,
The observation unit attaching / detaching means includes an insertion guide means that is formed in the body cavity insertion portion and passes the observation unit to the tip of the body cavity insertion portion; and the observation unit that is inserted through the insertion guide means is the body cavity insertion portion. An observation unit positioning fixing means for positioning and fixing to
The insertion guide means is provided on the proximal end side of the body cavity insertion portion, and the insertion port into which the observation unit is inserted, and the observation unit that is formed in the body cavity insertion portion and is inserted through the insertion port. An insertion path that guides to the distal end of the body cavity insertion portion,
The insertion guide means includes a separating member that forms an insertion passage that can be inserted into the body cavity insertion portion and can be inserted through the observation unit by being isolated from a built-in object arranged in the serpentine portion and the bending portion of the body cavity insertion portion
The separation member is composed of a tubular member, and is disposed in the body cavity insertion portion.
The tubular member has a positioning part that engages with a guide member that guides a wire that bends the bending part in the insertion part in the body cavity and positions the tubular member in the insertion part in the body cavity. It is a unit separation type treatment endoscope.

  In the present invention, since the observation unit attaching / detaching means capable of inserting / withdrawing the observation unit into / from the endoscope main body is provided, the observation unit can be attached / detached from the body cavity insertion portion on the endoscope main body side. When the observation unit is mounted on the endoscope body, the burden on the operator is reduced. In addition, since the insertion unit in the body cavity on the endoscope body side including the treatment arm and the observation unit can be separated, for example, when the endoscope is used, the insertion part in the body cavity on the endoscope body side is discarded. Then, it is possible to clean the observation unit and replace only the endoscope main body side with a new one. Therefore, the cost required for the cleaning operation can be greatly reduced. For example, by reusing an expensive observation unit that includes many electronic components such as an image sensor, the cost per treatment can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  One embodiment will be described with reference to FIGS. The treatment endoscope 10 according to this embodiment includes an endoscope main body 100 and an observation unit (observation optical system) 200 as shown in FIGS. 1 and 2A and 2B.

  The endoscope main body 100 includes a body cavity insertion portion 12 to be inserted into a body cavity, a branch member (branch portion) 14 disposed at a proximal end portion of the body cavity insertion portion 12, and a base of the branch member 14. A first extending portion 16 and a second extending portion 18 branched from the end side and separately extending rearward, and a first operating portion disposed at a base end portion of the first extending portion 16 ( (Main body operation unit) 20, a second operation unit (arm operation unit) 22 disposed at the base end of the second extension unit 18, and a universal cord 24 extended from the first operation unit 20. Prepare.

  Both the first extension part 16 and the second extension part 18 are formed of a long flexible member. The first operation unit 20 has a bending operation knob (handle) 23 as an operation means for bending an operation of a third bending portion (main body bending portion) 44 described later. When this bending operation knob 23 is operated, a later-described third bending portion (main body bending portion) 44 in the body cavity insertion portion 12 is bent. The main body member of the first operation unit 20 is provided with an insertion port 130 serving as an inlet for inserting a treatment tool (not shown) such as forceps into a third channel tube 66 described later. As shown in FIG. 2, the insertion port 130 is formed so as to open laterally away from the central axis of the first extension portion 16 and obliquely rearward.

  The second operation section 22 is provided with an operation unit (arm operation section) 41 as an operation means for performing a bending operation on a treatment work arm treatment arm section described later. The operation unit 41 includes an operation handle 41a for bending the first bending portion 38 of the first arm portion 32 as a treatment work arm treatment arm portion shown in FIG. 1, and a treatment work arm treatment arm portion. And an operation handle 41b for bending the second bending portion 40 of the first arm portion 32. One bending portion may be incorporated into the first arm portion 32 and the second arm portion 34, but here, as shown in FIG. 2B, the first arm portion 32 and the second arm portion 34. Both are provided with two bending portions, a first bending portion 38 and a second bending portion 40. For this reason, each operation handle 41a, 41b can operate each bending part 38, 40 of each bay part 32, 34 individually.

  As shown in FIG. 1, in the main body of the operation unit 41, the first insertion port 37 a leading to the first channel tube 62 that guides the treatment tool to the first arm portion 32 and the treatment tool to the second arm portion 34 are guided. And a second insertion port 37b communicating with the second channel tube 64 is provided. The first insertion port 37 a serves as a forceps port for inserting a treatment instrument guided to the first arm portion 32. The second insertion port 37 b serves as a forceps port for inserting a treatment instrument guided to the second arm portion 34. Further, the channel tubes 62 and 64 are not only used for inserting / removing the treatment instrument, but also for water supply / aspiration or injection of a chemical solution into the body cavity from the arm portions 32/34 corresponding to the channel tube. Is available.

  By the way, when performing a procedure operation for treating a living tissue or the like using the treatment endoscope 10, for example, an operation (twisting) of the proximal end portion of the body cavity insertion portion 12 or the first extension portion 16 about its axis. Operation). Therefore, the first extension portion 16 and the first operation portion 20 are arranged coaxially with the central axis of the body cavity insertion portion 12 from the branch member 14. For this reason, when performing the above-described twisting operation, the operating force for rotating the proximal end portion of the body cavity insertion portion 12 and the first extension portion 16 about the axis is compared with a case where the operation force is not provided coaxially. Therefore, it is easy to transmit to the distal end side of the body cavity insertion portion 12, and the operability when using the treatment endoscope is improved.

  As shown in FIG. 1 and FIG. 2 (A), the body cavity insertion portion 12 has an insertion portion main body 13 as a main body, and one that protrudes forward by connecting the base end to the distal end of the insertion portion main body 13. The treatment arm portion described above is provided. In this form, it is a double arm part provided with the 1st arm part 32 and the 2nd arm part 34 which are arrange | positioned along with right and left. The first arm portion 32 includes a first hard portion (tip portion) 36 positioned at the forefront, a first bending portion (arm portion bending portion) 38 disposed in connection with the proximal end of the first hard portion, The second bending portion (arm portion bending portion) 40 is connected to the proximal end of the first bending portion 38. The proximal end of the second bending portion 40 is fixedly connected to the distal end of the insertion portion main body 13. Similarly to the first arm portion 32, the second arm portion 34 also has a first hard portion (distal end portion) 36 positioned at the distal end, and a first bending portion (arm curving portion) arranged to be connected to the base end. 38 and a second bending portion (arm portion bending portion) 40 connected to the proximal end of the first bending portion 38. The proximal end of the second bending portion 40 is fixedly connected to the distal end of the insertion portion main body 13. Channels 33 and 35 are formed in the first arm portion 32 and the second arm portion 34, respectively (see FIG. 6). As shown in FIG. 11, the channel 33 of the first arm portion 32 is connected to the first channel tube 62, and the channel 35 of the second arm portion 34 is connected to the second channel tube 64.

  As shown in FIG. 2A, the insertion portion main body 13 includes a second hard portion (tip portion) 42 positioned at the foremost end and a third hard portion 42 that is connected to the base end of the second hard portion 42. A bending portion (main body bending portion) 44 (main body bending portion) and a serpentine tube portion (flexible tube portion) 46 connected to the proximal end of the third bending portion 44 are provided. The proximal end of the first arm portion 32 and the proximal end of the second arm portion 34 are both connected to the distal end of the insertion portion main body 13 and supported by the distal end of the insertion portion main body 13. Therefore, when the third bending portion 44 is bent, the first arm portion 32 and the second arm portion 34 follow the bending of the third bending portion 44 and move together with the distal end of the insertion portion main body 13. That is, the first arm portion 32 and the second arm portion 34 as the treatment work arms move following the bending of the third bending portion 44 with the position of the tip of the third bending portion 44 as a reference. Accordingly, when the distal end of the insertion portion main body 13 moves by bending the third bending portion 44, the first arm portion 32 and the second arm portion 34 move following the distal end of the insertion portion main body 13. Therefore, the state of the first arm portion 32 and the second arm portion 34 can be observed within the field of view of the observation unit 200 disposed at the tip of the second hard portion (tip portion) 42. Since the first arm portion 32 and the second arm portion 34 move following the distal end of the insertion portion main body 13, the first arm portion 32 and the second arm portion 34 are less likely to be invisible, and even if temporarily invisible. Easy to return to view. Therefore, the treatment work by the first arm part 32 and the second arm part 34 is easy and the work can be performed quickly.

  Here, each of the arm portions 32 and 34 includes a plurality of bending portions, that is, a first bending portion 38 and a second bending portion 40. For example, the bending portion includes only one portion, or three or more bending portions. It may have a part. Further, an indirect support member such as a flexible tube (serpentine tube) between the first bending portion 38 and the second bending portion 40 or between the second bending portion 40 and the second hard portion 42 at the distal end of the insertion portion main body 13. It is also possible to adopt a form in which the is disposed. Here, although not described in detail, the structure of the first bending portion 38 and the second bending portion 40 may be the same as that of the third bending portion 44.

  Next, the configuration of the insertion portion main body 13 will be specifically described. As shown in FIG. 4, the serpentine tube portion 46 of the insertion portion main body 13 includes a flex 52 formed in a cylindrical shape, a net-like blade 54 disposed outside the flex 52, and disposed outside the blade 54. The outer skin 56 is provided. The flex 52 is formed by winding a thin plate material made of, for example, stainless steel in a spiral shape so as to have a substantially circular shape. The blade 54 is formed, for example, into a substantially tubular shape by assembling a bundle of strands in which a plurality of strands made of stainless steel are bundled. The outer skin 56 is formed in a substantially tubular shape so as to cover the outside of the blade 54 with a flexible polymer material such as a rubber material or a resin material.

  As shown in FIGS. 3A, 3B, and 4, the third bending portion 44 located on the distal end side of the serpentine tube portion 46 is a bending tube made of a tubular member that can be bent in, for example, up, down, left, and right directions. 112 and the outer skin | cover 114 which covers this. The outer skin 114 includes a blade disposed on the inner surface. The bending tube 112 has a plurality of bending pieces 116, the plurality of bending pieces 116 are arranged in a line in the axial direction of the third bending portion 44, and adjacent front and rear bending pieces 116 are rotatably connected by pins 116a. Is. As shown in FIGS. 3A and 3B, the portion of the bending tube 112 located at the most distal end is fixed to the second hard portion 42 by, for example, adhesion or screwing. As shown in FIG. 4, a connection cap 118 is disposed between the proximal end of the bending tube 112 and the distal end of the serpentine tube portion 46. The connection base 118 connects the proximal end of the third bending portion 44 and the distal end of the serpentine tube portion 46.

  As shown in FIG. 4, on the inner peripheral surface of the connection base 118, for example, the closely wound coil-shaped third wire guides 86 are distributed and arranged at four locations on the upper, lower, left, and right sides of the inner peripheral surface. The tip of the third wire guide 86 is fixed to the connection base 118. A third wire 76 for bending the third bending portion 44 is inserted into each third wire guide 86 separately. The distal end portion of each third wire 76 extends independently from the distal end of each third wire guide 86 to the third bending portion 44 side. A wire receiving portion 116 b for guiding the third wire 76 is disposed on the inner peripheral surface of the bending piece 116. The tip of the third wire 76 is fixed to the tip of the bending tube 112 (the bending tip 116 at the tip) or the second hard portion 42. Therefore, the third bending portion 44 is bent in the pulling direction by pulling one of the third, right, left and right third wires 76 toward the front side in the axial direction. Although not shown in the present embodiment, a net-like blade such as the blade 54 of the serpentine tube portion 46 may be disposed between the bending tube 112 and the outer skin 114.

  As shown in FIG. 11, a plurality of built-in objects to be described later and a guide tube (tubular member) 96 for guiding the observation unit 200 while avoiding these built-in objects are disposed in the insertion portion main body 13. ing. The built-in items referred to here are, for example, first to third channel tubes 62, 64, 66, four pairs of first wires 72, two pairs of second wires 74, and two pairs of third wires. 76, the first wire guide 82, the second wire guide 84 and the third wire guide 86 or the air supply tube 92, the water supply tube 94, etc., through which these wires 72, 74 and 76 are inserted separately, respectively. Not limited to this.

  The guide tube 96 is also a kind of built-in object. Here, an insertion path (path) 97 for guiding an observation unit 200 described later is formed, and the guide tube 96 itself is separated from other built-in objects. It becomes a separating member for isolating and forming the insertion passage 97. In this respect, the guide tube 96 is distinguished from other built-in objects.

  As shown in FIG. 11, an observation unit attaching / detaching means for detachably attaching the observation unit 200 to the insertion portion is incorporated in the body cavity insertion portion 12. This observation unit attaching / detaching means includes a guide tube (observation unit guide tube) 96 disposed in the body cavity insertion portion 12 so as to avoid the above-mentioned built-in objects. The guide tube 96 here is formed as a tubular member having a substantially flat cross-sectional shape. Further, the guide tube 96 constitutes a restricting means for determining the direction around the axis of the observation unit 200 inserted through the guide tube 96 by making the cross-sectional shape substantially flat. Therefore, the guide tube 96 here is an observation unit insertion guide means formed so as to isolate and separate the insertion path (path) 97 for guiding the observation unit 200 from the other built-in components. At the same time, it becomes a part of the observation unit attaching / detaching means.

  The first channel tube 62 shown in FIG. 11 is led from the serpentine tube portion 46 of the insertion portion main body 13 through the third bending portion 44 and the second hard portion 42 to the first hard portion 36 of the first arm portion 32, and 1 A passage reaching the opening of the hole formed in the hard portion 36 is formed. That is, the tip of the first channel tube 62 communicates with the channel 33 formed in the first arm portion 32. The proximal end portion of the first channel tube 62 passes through the second rigid portion 42, the third bending portion 44, the serpentine tube portion 46, the branch member 14, and then through the second extension portion 18 to the first insertion port of the second operation portion 22. 37a.

  As in the case of the first channel tube 62, the second channel tube 64 shown in FIG. 11 extends from the serpentine tube portion 46 to the first hard portion 36 of the second arm portion 34 through the third bending portion 44 and the second hard portion 42. Led. The tip of the second channel tube 64 forms a passage that reaches the opening of the hole formed in the first hard portion 36. That is, the second channel tube 64 communicates with the channel 35 formed in the second arm portion 34. The base end side of the second channel tube 64 is connected from the second hard portion 42 to the second insertion port 37b of the second operation portion 22 through the third bending portion 44, the snake tube portion 46, the branch member 14, and the second extension portion 18. Is done.

  On the other hand, as shown in FIGS. 3A and 3B and FIG. 11, the distal end of the third channel tube 66 is connected to a distal end opening (forceps opening) 108 formed in the second hard portion 42 of the insertion portion main body 13. The The tip of the third channel tube 66 is connected to a connection tube 93 fixed to the second hard portion 42. As shown in FIGS. 3A and 3B, the connection pipe 93 is connected to a connection hole 109 that forms the tip opening 108 of the third channel. The proximal end side of the third channel tube 66 is guided through the third bending portion 44, the snake tube portion 46, the branch member 14, and the first extension portion 16, and connected to the insertion port (forceps port) 130 of the first operation unit 20. Has been.

  The first bending portion 38 in each of the first arm portion 32 and the second arm portion 34 is operated to bend in four directions, for example, up, down, left, and right by two pairs of first wires (bending operation wires) 72. The tips of the two pairs of first wires 72 are connected to the first bending portions 38 of the corresponding first arm portion 32 and second arm portion 34, respectively. The proximal ends of the two pairs of first wires 72 are second along the outer periphery of the channel tube 62 or the channel tube 64 corresponding to the arm portion of the corresponding first bending portion 38 on which the first wire 72 is bent. The bending portion 40, the second hard portion 42, the third bending portion 44, the snake tube portion 46, the branch member 14, and the second extending portion 18 are guided to the second operation portion 22.

  The second bending portion 40 in each of the first arm portion 32 and the second arm portion 34 is operated to bend in the left and right directions, for example, by a pair of second wires (bending operation wires) 74. The distal ends of the pair of second wires (bending operation wires) 74 are connected to the second bending portions 40 of the corresponding first arm portion 32 and second arm portion 34, respectively. The proximal end side of the second wire 74 has the second hard portion 42, the second rigid portion 42 along the outer periphery of the channel tube 62 or the channel tube 64 corresponding to the arm portion of the corresponding second bending portion 40 to which the second wire 74 is bent. The third bending portion 44, the snake tube portion 46, the branch member 14, and the second extension portion 18 are connected to the second operation portion 22.

  When the pair of first wires 72 are pushed and pulled by the second operation unit 22, the corresponding first bending portions 38 of the arm portions 32 and 34 are bent in four directions, for example, up, down, left, and right. When the second operation unit 22 pushes and pulls the pair of second wires 74, the corresponding second bending portions 40 of the arm portions 32 and 34 are bent in, for example, the left and right directions. The first bending portion 38 of the first arm portion 32 and the first bending portion 38 of the second arm portion 34 can be independently bent. The second bending portion 40 of the first arm portion 32 and the second bending portion 40 of the second arm portion 34 can be independently bent. Note that the first bending portion 38 and the first bending portion 340 are not limited to the above directions, and may be bent in other directions.

  The distal ends of the first wire guides 82 that individually guide the first wires 72 are connected to the proximal ends of the first bending portions 38 of the first and second arm portions 32 and 34, respectively. . The proximal end side portion of the first wire guide 82 has the second bending portion 40 along the outer periphery of the channel tube 62 or 64 corresponding to the arm portion having the first bending portion 38 on which the first wire 72 is bent. The second hard portion 42, the third bending portion 44, the snake tube portion 46, and the branch member 14 are guided from the second extension portion 18 to the inside of the second operation portion 22. The proximal end portion of the first wire guide 82 does not necessarily need to be fixed.

  The distal ends of the second wire guides 84 that individually pass through the second wires 74 and guide the respective wires are connected to the proximal ends of the second bending portions 40 of the first and second arm portions 32 and 34 to which the second wire guides 84 correspond. . The proximal end portion of the second wire guide 84 is the second hard portion 42 along the outer periphery of the channel tube 62 or 64 corresponding to the arm portion having the second bending portion 40 to be bent by the second wire 74. The second bent portion 18 is guided from the second extending portion 18 to the inside of the second operating portion 22 through the third bending portion 44, the serpentine tube portion 46, and the branching member 14. The proximal end side portion of the second wire guide 84 is not necessarily fixed.

  On the other hand, two pairs of third wires 76 for bending the third bending portion (main body bending portion) 44 in the body cavity insertion portion 12 are brazed to members near the distal end of the third bending portion 44. Or connected by soldering. The proximal end portion of the third wire 76 is guided from the insertion portion main body 13 to the first operation portion 20 through the inside of the serpentine tube portion 46, the branch member 14, and the first extension portion 16. The distal ends of two pairs of third wire guides 86 for guiding the third wires 76 are connected to the connection cap 118 shown in FIG. The proximal end portion of the third wire guide 86 is guided to the inside of the first operation unit 20 through the serpentine tube portion 46, the branch member 14, and the first extension portion 16. The first to third wire guides 82, 84, 86 are each formed by a tube member formed in, for example, a closely wound coil shape. The proximal end portion of the third wire guide 86 is not necessarily fixed.

  Therefore, when the first operation unit 20 pushes and pulls each pair of the third wires 76, the third bending portion 44 is bent in a corresponding direction. In the case of this embodiment, since there are two pairs of third wires 76, the third bending portion 44 can be bent in, for example, four directions, up, down, left, and right.

  The tip of the air supply tube 92 and the tip of the water supply tube 94 shown in FIG. 11 are gathered together with the connection pipe 95 fixed to the second hard portion 42 in the vicinity of the second hard portion 42 of the insertion portion main body 13 shown in FIG. Connected. For this reason, the air supply tube 92 and the water supply tube 94 communicate with the common nozzle 106 via the connection hole 111 provided in the second hard portion 42. The proximal end portions of the air supply tube 92 and the water supply tube 94 are universally connected through the third bending portion 44, the serpentine tube portion 46, the branch member 14, the first extension portion 16, and the first operation portion 20 through the universal cord 24. It is led to the connection connector 25 provided at the end of the cord 24 (see FIG. 2).

  As shown in FIG. 3, the observation unit guide tube 96 is arranged in a predetermined region in the space inside the insertion portion main body 13 of the body cavity insertion portion 12. That is, the observation unit guide tube 96 constitutes the distal end portion of the insertion portion main body 13 from a position regulated by a later-described separation plate 147 provided on the branching member 14 shown in FIGS. 2 (A), 9 and 10. 2 Arranged through a predetermined area up to the observation opening (observation window) 104 of the hard part 42. A proximal end portion of the guide tube 96 is fixed to a guide member 142 described later through a predetermined region of the separation plate 147. Further, the tip of the guide tube 96 is disposed at a predetermined position of the second hard portion 42. The guide tube 96 divides a region separated from other built-in objects in the inner region of the insertion portion main body 13, and an insertion path (observation unit guide means for guiding an observation unit 200 described later to the distal end of the body cavity insertion portion 12 ( Route) 97 is formed.

  The guide tube 96 is made of a resin such as polytetrafluoroethylene (tetrafluoroethylene) or tetrafluoroethylene / hexafluoropropylene copolymer (4.6 fluoroethylene), a metal foil such as aluminum, or other material. 11 is formed as a tube having a substantially flat cross-sectional shape shown in FIG.

  The guide tube 96 has a flexibility that can follow the deformation of the flexible tube portion 46 and the third bending portion 44 of the insertion portion main body 13 as long as the function of guiding the observation unit 200 is not impaired. Therefore, the guide tube 96 has a flexible elasticity that expands in accordance with the thickness and shape of the observation unit 200 when guiding the observation unit 200. Therefore, even when the observation unit 200 having a narrower cable portion than the imaging unit incorporated in the observation unit 200 is inserted, the guide tube 96 contracts in the portion through which the cable unit passes after passing through the imaging unit 202, or Since the guide tube itself is easily bent, the deformation of the flexible tube portion and the bending portion of the insertion portion main body 13 is not significantly hindered.

  Next, the structure of the front-end | tip part of the body cavity insertion part 12 is demonstrated. As shown in FIGS. 5 and 6, a pair of illumination windows 102, an observation opening 104 for positioning and arranging the distal end of the imaging unit 202 of the observation unit 200 described later, The air / water supply nozzle 106 with the jet outlet facing the front end surface of the imaging unit 202 mounted in the observation opening 104 and the front end opening (channel port) 108 to which the third channel tube 66 is connected are both included. It is formed to be exposed. The illumination window 102 includes a tip lens 135 that also serves as a transparent cover. The observation opening 104 is formed as an opening that penetrates to the outside. Here, the observation opening 104 is formed open, but the observation opening 104 may be closed with a transparent cover.

  As shown in FIGS. 5 and 6, the observation opening 104 is disposed between the pair of illumination windows 102. In the region located below the pair of illumination windows 102 and the observation opening 104, the first arm portion 32 and the second arm portion 34 described above that are disposed on the left and right sides of the observation opening 104 are substantially the same. It is provided symmetrically. An air / water supply nozzle 106 is provided directly below the observation opening 104. A tip opening 108 is disposed in the lower region of the air / water supply nozzle 106. The observation opening 104, the air / water supply nozzle 106, and the tip opening 108 are arranged substantially in a line with their centers positioned on a vertical line passing through the tip surface center of the second hard portion 42. The pair of illumination windows 102 are arranged substantially symmetrically with respect to the observation opening 104. Since the first arm portion 32 and the second arm portion 34 are disposed below the pair of illumination windows 102 and the observation opening 104 and symmetrically disposed with respect to the observation opening 104, the observation unit 200 is provided. Thus, it is easy to observe the posture and movement of the first arm portion 32 and the second arm portion 34. Here, the positions of the first arm portion 32 and the second arm portion 34 are arranged below the observation opening 104, but their arrangement relationship is specified, for example, the arrangement is reversed upside down. It is not a thing.

  As shown in FIGS. 3A and 3B and FIG. 5, the second hard portion 42 is formed in a substantially cylindrical shape with a metal material such as stainless steel or a hard resin material, for example. . In this case, the outer periphery is electrically insulated. The inside of the second rigid portion 42 is located inside both the two illumination windows 102 and the observation opening (observation window) 104, and both inner regions of the two illumination windows and the observation opening are provided. One recessed space having a combined size is formed. This recessed space forms a storage chamber 132 for positioning and storing the imaging unit 202, which is the tip of the observation unit 200 described later, in a predetermined direction. Since the storage chamber 132 has a cross-sectional shape that corresponds to a shape and a size that match a cross-sectional shape of the imaging unit 202 described later, the imaging unit 202 stored in the storage chamber 132 has a predetermined orientation. It is formed to be positioned with. That is, the storage chamber 132 constitutes a restricting means that determines the direction around the axis of the observation unit.

  As shown by the dotted line in FIG. 6, the storage chamber 132 here is formed in a substantially flat shape that is horizontally long and symmetrical in the left and right directions and vertically asymmetric. That is, the cross-sectional shape of the storage chamber 132 is set to match the cross-sectional shape of the imaging unit 202. However, the cross-sectional shape of the storage chamber 132 may not be a shape corresponding to the cross-sectional shape of the image pickup unit unit 202 as long as the image pickup unit unit 202 can be installed in the storage chamber 132 while being positioned in a predetermined direction.

  As shown in FIGS. 3A and 3B and FIG. 5, the rear end side entrance portion of the storage chamber 132 is formed in a shape that extends backward in a substantially tapered shape that extends vertically and horizontally compared to the front end side portion. . Due to this widening shape, the rear end side entrance portion of the storage chamber 132 forms an entrance guide portion (insertion guide portion) 134 when the imaging unit 202 is inserted into the storage chamber 132. The entrance guide part 134 has a guide function for smoothly guiding the part of the image pickup unit unit 202 guided by the guide tube 96 to a predetermined position in the storage chamber 132.

  The storage chamber 132 is provided with a means for positioning and fixing the imaging unit 202 stored therein. The tip of the observation unit 200 can be positioned and fixed by means of positioning and fixing. This is an example of the observation unit positioning and fixing means. Further, as means for positioning and fixing the imaging unit, as shown in FIGS. 3A and 3B and FIG. 5, an edge 105 narrower than the inner space of the storage chamber 132 is formed at the leading edge of the observation opening 104. To do. The edge portion 105 serves as a stopper that restricts the end position of the imaging unit unit 202 in the insertion direction by abutting the peripheral edge of the imaging unit unit 202 stored in the storage chamber 132. In addition, a circumferential groove 139 into which an O-ring 140 as a seal member is fitted is formed on the inner surface near the tip of the observation opening 104. When the O-ring 140 is fitted into the circumferential groove 139, as shown in FIG. 3B, when the imaging unit 202 is stored in the storage chamber 132, the O-ring 140 is positioned at the outer periphery of the distal end of the imaging unit 202. As a liquid-tight means for sealing the observation opening 104 by tightening, the positioning and holding function for fixing the imaging unit 202 positioned in the storage chamber 132 at the predetermined position is provided. As described above, the means for positioning and arranging the imaging unit 202 with respect to the storage chamber 132 and the means (mechanism) for fixing the imaging unit 202 stored in the storage chamber 132 are the observations inserted through the insertion guide means of the insertion unit main body 13. Since the unit is positioned and fixed with respect to the insertion portion main body 13, it becomes one of observation unit positioning and fixing means for positioning and fixing the observation unit 202 to the insertion portion main body 13 of the body cavity insertion portion 12.

  As shown in FIGS. 3A and 3B, in the second hard portion (tip portion) 42, the portion corresponding to the inlet guide portion 134 of the storage chamber 132 is provided with the imaging unit unit guide tube 96. The tip portion is arranged. Here, as shown in FIGS. 3 and 5, the distal end portion of the guide tube 96 is fixed to the member of the second hard portion 42. As described above, the inlet guide part 134 of the storage chamber 132 is formed in a tapered shape so as to be wider than the diameter of the tip part of the guide tube 96. Therefore, a part of the tip part of the guide tube 96 is provided in the inlet guide part 134. They may be placed inside.

  Further, the distal end portion of the guide tube 96 may be disposed in a free state in which the distal end portion of the guide tube 96 can advance and retract in the axial direction without fixing the distal end portion of the guide tube 96 to the member of the second hard portion 42. Since the guide tube 96 is at a position shifted from the central axis of the insertion portion main body 13, the guide tube 96 advances and retreats in the axial direction when the bending of the third bending portion 44 or the bent tube portion 46 is bent. However, when the distal end of the guide tube 96 is not fixed to the second rigid portion 42 and is disposed in a free state with respect to the inlet 134 of the storage chamber 132, the guide tube 96 itself becomes the third curved portion 44 and the snake tube. It moves according to the deformation of the portion 46 and does not hinder the deformation of the third bending portion 44 and the flexible tube portion 46. If the tip of the guide tube 96 is disposed so as to enter the inlet 134 of the storage chamber 132, the guide tube 96 can be prevented from coming off from the inlet 134 even if the guide tube 96 moves forward and backward, and the imaging unit guided through the guide tube 96. The unit 202 can be reliably guided into the storage chamber 132.

  As shown in FIG. 7, the shape holding tape 136 is wound around the outer periphery of the distal end portion of the guide tube 96 to maintain the shape of the distal end portion of the guide tube 96. When the shape holding tape 136 is wound around the outer periphery of the distal end portion of the guide tube 96 in this way, the shape of the distal end portion of the guide tube 96 is determined to be a predetermined shape. The tip position of the guide tube 96 can be easily determined even when the portion is placed in the rear end side entrance portion and positioned. Further, as shown in FIG. 7, the tip portion of the guide tube 96 is hung on the protrusion 137 provided on the inner surface of the second hard portion 42, and the tip portion of the guide tube 96 is interposed between the inner surface of the second hard portion 42. It is installed to support. In this way, the position of the tip portion of the guide tube 96 can be determined more easily. Further, the support portion at the distal end portion of the guide tube 96 may be bonded to the second hard portion 42 and the protrusion 137. This guide tube positioning and fixing means by the protrusions and the like is effective even when the tape is not wound around the outer periphery of the distal end of the guide tube 96.

  The distal end of the guide tube 96 and the storage chamber 132 may be connected by other connecting means that allows the guide tube 96 to slide. Further, when the distal end of the guide tube 96 and the storage chamber 132 or the inlet 134 are fixedly connected, an elastic material that can be expanded and contracted may be used for the guide tube 96. Further, the expansion / contraction absorbing means may be configured by incorporating a member that can be expanded and contracted or slid into the connecting portion between the guide tube 96 and the storage chamber 132 or the inlet 134.

  Further, as shown in FIG. 8, both ends of the plate material 138 are hung over a pair of left and right protrusions 137 protruding from the inner surface of the second hard portion 42, and the tip portion of the guide tube 96 is supported from below by the plate material 138. Good. The plate material 138 is formed of a thin sheet metal or the like. The plate material 138 and the protrusion 137 may be fixed by adhesion or the like. Further, the distal end portion of the guide tube 96 may be fixed to the peripheral portion thereof by adhesion or the like, and the distal end portion of the guide tube 96 can be reliably positioned and fixed by fixing by adhesion or the like.

  Next, the structure of the branch member 14 of the endoscope main body 100 will be described with reference to FIGS. 9 and 10. The branch member 14 is formed in a trifurcated shape. Then, the first extension part 16 and the second extension part 18 are branched from the body cavity insertion part 12, and the built-in object disposed in the body cavity insertion part 12 inside the first extension part 16, Branches to the second extension 18. Moreover, it has the function to hold | maintain the rear-end opening part of the guide tube 96 in the state exposed outside. The branch member 14 has a main body casing 122. A proximal end portion of the body cavity insertion portion 12 is connected to a distal end portion of the main body casing 122. The first extending portion 16 and the second extending portion 18 are connected to the rear end portion of the main body casing 122.

  As shown in FIG. 9, an insertion port 123 serving as a port for inserting the observation unit (observation optical system) 200 into the insertion guide means (guide tube 96) is provided at the upper rear end of the main body casing 122. As shown in FIG. 2, the first extension portion 16 is arranged coaxially with the body cavity insertion portion 12, so that the insertion port 123 has a second extension with respect to the central axis of the first extension portion 16. It arrange | positioned so that the diagonal opening might be carried out to the outward direction opposite to the part 18. As shown in FIG. For this reason, when inserting the observation unit 200 in the insertion port 123, the 1st extension part 16 and the 2nd extension part 18 do not become obstructive.

  As shown in FIGS. 9 and 10, a guide member 142 formed in a cylindrical shape is incorporated in the main body casing 122 of the branch member 14. The guide member 142 regulates the observation unit 200 through a guide space 143 formed in the guide member 142 so that the upper, lower, left, and right directions are in a predetermined direction, and the observation unit 200 is inserted into the guide tube 96 in the body cavity insertion portion 12. The insertion guide means to be inserted into is configured. The insertion port 123 is formed by an opening formed at one end of the guide member 142. The other end (inner end) of the guide member 142 positions and holds a separation plate 147, which will be described later, and connects the rear end opening edge of the guide tube 96.

  The cross-sectional shape of the insertion port 123 is formed in a shape that matches the cross-sectional outline of the imaging unit 202 of the observation unit 200. Since the imaging unit 202 here is symmetric and vertically asymmetric, the cross-sectional shape of the insertion port 123 is formed accordingly. For example, the imaging unit 202 is formed in a flat oval shape that cannot rotate. Therefore, it constitutes a rotation restricting means in which the imaging unit 202 cannot rotate within the guide member 142. At the same time, when the image pickup unit 202 is inserted into the insertion port 123, a configuration is provided that restricts the direction in which the image pickup unit 202 cannot be inserted into the insertion port 123 unless the vertical, left, and right directions of the image pickup unit 202 are predetermined. To do. Therefore, the guide member 142 including the insertion port 123 forms a direction restricting portion that restricts the direction (posture) when the imaging unit 202 is inserted. The exit 145 portion of the guide space 143 shown in FIG. 10 may also be configured as a restricting means for restricting the orientation (posture) of the imaging unit 202 as with the insertion port 123.

  Further, the entrance 144 portion of the guide space 143 shown in FIG. 9 and the exit 145 portion of the guide space 143 shown in FIG. 10 are crossed in a shape closer to the outer shape of the imaging unit 202 than the other guide space 143 portions. It is formed in a surface shape. In this way, the narrow portion of the entrance 144 and the exit 145 has a shape similar to the cross-sectional shape of the imaging unit 202 and is slightly larger than the imaging unit 202, so that the insertion direction of the imaging unit 202 is changed. The regulation guide function can be enhanced. The middle part of the guide member 142 is relatively thick but has a similar flat shape. Therefore, the imaging unit 202 inserted from the inlet 144 of the guide member 142 is guided by the guide member 142 in a specific direction in which the vertical direction is determined, and the outlet 144 and the separation plate of the guide space 143 are maintained in the same posture. It is guided to the guide tube 96 through 147. For this reason, the imaging unit 202 inserted from the inlet 144 of the guide member 142 is guided to the guide tube 96 in a predetermined direction toward the center of the guide tube 96 of the insertion guide means.

  On the other hand, as shown in FIG. 10, a separation plate 147 formed in a substantially disc shape is disposed at the inner end (end end side end of the insertion portion) of the guide member 142. The separation plate 147 includes first to fifth opening regions 172, 174, 176, 178 and 180 that are separated from each other. The first to third opening regions 172, 174, and 176 are disposed below the fifth opening region 180, and the fourth opening region 178 is disposed above the fifth opening region 180.

  The first opening region 172 has a first channel tube 62 communicating with the first arm portion 32, wires 72 and 74 for bending the curved portions 38 and 40 of the first arm portion 32, and these wires are covered. Wire guides 82 and 84 are inserted. The second opening region 174 has a second channel tube 64 communicating with the second arm portion 34, wires 72 and 74 for bending the bending portions 38 and 40 of the second arm portion 34, and wires covering these wires. Guides 82 and 84 are inserted. The third channel tube 66, the air supply tube 92, and the water supply tube 94 are inserted through the third opening region 176. In the first to fourth opening regions 172, 174, 176, and 178, a third wire 76 for bending the third bending portion 44 and a third wire guide 86 for covering them are appropriately dispersed. Are arranged. In the fifth opening region 180, the distal end portion of the guide member 142 described above and the proximal end portion of the guide tube 96 described above are coaxially disposed, and the distal end portion of the guide member 142 is located in the proximal end portion of the guide tube 96. The connection is made with a part of it in. In this case, the distal end portion of the guide member 142 and the proximal end portion of the guide tube 96 are fixed, but they may be connected in a slidably fitted state while maintaining a state in which they are in communication with each other.

  As a result of positioning the distal end portion of the guide member 142 and the proximal end portion of the guide tube 96 at predetermined positions by the separation plate 147, the other built-in members are isolated from the guide member 142 and the guide tube 96. Can be separated from each other. Therefore, the guide tube 96 is arranged at a predetermined position independently from other built-in members. Therefore, the position of the guide tube 96 as insertion guide means for inserting the observation unit 200 is determined.

  Here, as shown in FIG. 10, the first to third opening regions 172, 174, and 176 are arranged below the fifth opening region 180, and the fourth opening region 178 is above the fifth opening region 180. Placed in. Therefore, the first channel tube 62 that communicates with the first arm portion 32, the pair of wires 72 and 74 that bend the bending portions 38 and 40 of the first arm portion 32, and the first wire guide 82 that covers these wires, 84, a second channel tube 64 communicating with the second arm portion 34, a pair of wires 72 and 74 for bending the bending portions 38 and 40 of the second arm portion 34, and a second wire guide 82 covering these wires. 84, the third channel tube 66, the air supply tube 92 and the water supply tube 94, the third wire 76, and the third wire guide 86 covering them, avoid the region where the guide tube 96 as the insertion guide means is disposed. It is arranged in a separated state. These members are also arranged in the second hard portion 42 located at the distal end of the insertion portion main body 13 in the same manner as in the disposition state on the separation plate 147 (see FIG. 11). 42 is assembled.

  By the way, it is expected that the built-in member incorporated in the insertion portion main body 13 maintains its arrangement state in the predetermined positional relationship described above. However, in the insertion portion main body 13, since it is necessary to allow the third bending portion 44 and the serpentine tube portion 46 to bend or bend, a member incorporated in the insertion portion main body 13 is free to move in the insertion portion main body 13. Basically, it should be arranged in a stable state. On the other hand, when the third bending portion 44 and the serpentine tube portion 46 are bent or bent, the arrangement relationship between the members is easily broken. Therefore, in this embodiment, an insertion guide means as an insertion path for guiding the observation unit 200 is also formed in the insertion portion main body 13 so that the observation unit 200 is guided to the distal end of the insertion portion main body 13.

  In this embodiment, as shown in FIG. 11, in order to secure a passage region for separating and guiding the observation unit from other built-in objects, the guide tube 96 as the insertion guide means is partitioned from the other built-in objects. It was made to arrange | position in the insertion part main body 13 of the body cavity insertion part 12 in the state which isolate | separated. An insertion path (path) 97 for guiding the observation unit 200 with the guide tube 96 is secured in the insertion portion main body 13. That is, the guide tube 96 forms an insertion path 97 that guides the observation unit 200 by inserting it away from the built-in components disposed in the flexible tube portion 46 and the third bending portion 44 of the insertion portion main body 13. The distal end of the guide tube 96 is continuous with the storage chamber 132 of the second hard portion 42.

  By the way, it is expected that the built-in objects incorporated in the insertion portion main body 13 are maintained in the predetermined positional relationship described above. However, since the insertion portion main body 13 moves such that the third bending portion 44 and the serpentine tube portion 46 are bent or bent, these built-in objects are basically free in the insertion portion main body 13. I try to arrange it. Therefore, when the third bending portion 44 and the serpentine tube portion 46 are bent or bent, the arrangement relationship of the built-in objects is easily broken. The observation unit 200 cannot be inserted into a predetermined position simply by inserting the observation unit 200 into the insertion portion main body 13.

  Therefore, in this embodiment, the insertion portion main body is separated and separated from the other built-in objects as a separating member in order to partition the insertion path for inserting and guiding the observation unit 200 by separating from the other built-in objects. 13 is arranged inside. Since the guide tube 96 is arranged in a separate section from other built-in objects, the guide tube 96 has an insertion path (path) 97 for guiding the observation unit 200 that does not interfere with the other built-in objects inside the insertion portion main body 13. Secure. The distal end of the guide tube 96 is connected to the storage chamber 132 of the second hard portion 42, so that the observation unit 200 can be guided to the storage chamber 132. In other words, the guide tube 96 is a separation member that forms an insertion path 97 that guides the observation unit 200 by inserting it away from the built-in components disposed in the flexible tube portion 46 and the third bending portion 44 of the insertion portion main body 13. It has become.

  By the way, as shown in FIGS. 1 and 2A, the observation unit 200 in this embodiment includes a state-of-the-art imaging unit 202, a cable unit 204 connected to the imaging unit 202, and a cable unit 204. And an observation unit connector 206 connected to the base end of the observation unit. The observation unit connector 206 is inserted into the connection connector 25 provided at the extended end of the universal cord 24 described above, and is detachably mounted. The connection connector 25 is provided with a signal cable 207. An imaging connector 208 shown in FIG. 1 is provided at the extending end of the signal cable 207. The imaging connector 208 can be connected to a camera control unit as an external device (not shown). The camera control unit captures an image with an imaging module as an imaging unit (imaging unit), converts the imaging signal into a video signal with a signal line (signal transmission unit), and displays an image on a monitor (not shown). The connection connector 25 is also used as a light guide connector for connecting the light guide tube 203 to a light source device (not shown). Further, the connection connector 25 is connected to a fluid source of a fluid control unit (not shown) through a connection terminal (not shown), and the air supply tube 92, the water supply tube 94, or the third channel tube 66 of the treatment endoscope 10 through the universal cord 24 described above. Supply air, water, or suction. The light guide tube 203 is connected to a light guide (fiber bundle) 224 (to be described later) of the cable unit 204 for guiding illumination light.

  As shown in FIGS. 12A, 12B, and 13C, the imaging unit 202 includes a casing 222 formed of a metal material. The casing 222 is located between the pair of pipe portions 225 and a pair of pipe portions 225 for inserting the tip ends of the light guides 224 shown in FIG. An imaging element such as a CCD and an objective optical system are integrally formed so that one pipe portion 227 for interpolating 226 is disposed in parallel with the longitudinal direction directed in the same direction. Further, as shown in FIG. 12B, the pair of left and right pipe portions 225 are located slightly offset upward from the center of the pipe portion 227 at the center position. Therefore, the pair of pipe portions 225 and the single pipe portion 227 are substantially symmetrical with respect to the α-α line in the vertical direction in FIG. Since the pipe portion 225 is arranged to be offset in the up-down direction here in this case with respect to the pipe portion 227, the pipe portion 225 has an asymmetric shape with respect to the β-β line in the left-right direction. The casing 222 has an asymmetric cross-sectional shape in at least one of top and bottom and left and right. The cross-sectional shape of the imaging unit 202 is an irregular shape having no symmetry in at least one of the top and bottom and the left and right. It is a flat cross-sectional shape with different vertical and horizontal widths. Here, it is a flat shape whose vertical width is smaller than the horizontal width.

  In the present embodiment, the cross-sectional shape of the casing 222 has been described as being bilaterally symmetric only with respect to the α-α line, but may be asymmetric with respect to the α-α line. In this case, it becomes an irregular shape with no symmetry in the top, bottom, left and right.

  Therefore, the imaging unit 202 has a specified vertical and horizontal orientation. For this reason, the imaging unit 202 is inserted into the insertion passage 97 of the insertion guide means of the treatment endoscope in the determined orientation, and is mounted in the storage chamber 132 in that orientation. As described above, if the insertion passage 97 and the storage chamber 132 are not in their predetermined directions, they have a flat cross-sectional shape that does not allow the image pickup unit 202 to be inserted or mounted. As described above, the insertion port 123 of the branch member 14 and the guide space 143 in the guide member 142 have a flat cross-sectional shape as well. Therefore, the imaging unit 202 is not reversed while being inserted into the insertion guide means formed between the insertion port 123 of the branch member 14 and the separation plate 147 and between the separation plate 147 and the storage chamber 132. It is guided in the predetermined posture and is attached to the body cavity insertion portion 12. In particular, since the insertion port 123 and the outlet 145 in the guide member 142 are narrowly formed in accordance with an irregular cross-sectional shape that uniquely determines the top, bottom, left, and right of the imaging unit 202, the imaging unit 202 has an upside down orientation. Then, it cannot be inserted into the insertion port 123.

  As shown in FIGS. 12A, 12B, and 13C and FIGS. 13A and 13B, the signal line 228 and the light guide 224 connected to the imaging module 226 are bundled with the heat-shrinkable tube 230 or the like. The cable unit 204 is formed into one cable shape by the members. The front end portion of the heat-shrinkable tube 230 covers the base end portion of the casing 222, so that the heat-shrinkable tube 230 becomes a folding tube with respect to the casing 222. Although the cable unit 204 is flexible, it becomes an introduction lead portion when the imaging unit 202 is operated to be taken in and out of the insertion guide means. It must be strong.

  Here, as shown in FIGS. 13A and 13B, the signal line 228 and the pair of light guides (fiber bundles) 224 are integrated together by a bundling member such as a heat-shrinkable tube 230, and therefore predetermined. The strength of the waist was ensured.

  As shown in FIGS. 1 and 2, a cable operating grip 205 is provided in the middle of the cable portion of the cable unit 204. As shown in FIGS. 1 and 2, an engagement portion 209 that also serves as a folding member is provided between the cable operation gripping portion 205 and the distal end side cable portion. The engaging portion 209 can be detachably engaged with an engaged portion provided in the opening portion 148 of the inlet 144 of the branching member 14. Here, it is preferable to provide a seal portion that seals the engagement portion 209 and the engaged portion provided at the opening portion 148 of the inlet 144 of the branching member 14 in a liquid-tight state between the engagement portions. .

  The cable operation gripping portion 205 serves as a push-in operation member for gripping the cable unit 204 when the cable unit 204 is pushed into the insertion portion main body 13 of the treatment endoscope 10. Therefore, when the observation unit 200 is attached to the insertion guide means of the body cavity insertion portion 12, the cable operation grip portion 205 can be gripped to push the observation unit 200 and simultaneously adjust the amount of push. Then, the cable unit 204 can be positioned and fixed with respect to the intracorporeal insertion portion 12 by fitting the engagement portion 209 into the insertion port 123 of the insertion guide means provided in the branching member 14 and engaging.

  The portion of the cable unit 204 that is led out from the treatment endoscope 10 in a state where the cable unit 204 is inserted into the body cavity insertion portion 12 from the insertion port 123 and the observation unit 200 is set on the treatment endoscope 10 is a cable operation. Since the gripping portion 205 is covered, it is possible to prevent a sudden bend from occurring at the leading end portion of the cable unit.

  Further, when the engaging portion 209 at the tip of the cable operation gripping portion 205 is engaged with the branch member 14 of the body cavity insertion portion 12, the imaging portion unit 202 of the observation unit 200 is stored in the storage chamber 132 in the body cavity insertion portion 12. The length of the cable unit 204 is set so that it can be accommodated within. Therefore, when the observation unit 200 is attached to the insertion guide means of the body cavity insertion portion 12 and the engaging portion 209 is engaged with the branch member 14, the observation unit 200 is positioned at a predetermined position with respect to the body cavity insertion portion 12. , Will be fixed in that state. Therefore, the engaging portion with respect to the branch member 14 is also an example of the observation unit positioning and fixing means for positioning and fixing the observation unit with respect to the body cavity insertion portion 12.

  Next, an effect | action at the time of using the treatment endoscope 10 which concerns on this form is demonstrated. When the treatment endoscope 10 is used, the observation unit 200 is inserted into the insertion port 124 of the endoscope main body 100. At this time, the imaging unit 202 of the observation unit 200 cannot be inserted through the insertion slot 123 unless it has a predetermined vertical and horizontal orientation. Therefore, whether or not the observation unit 200 is in the correct orientation can be determined by whether or not the imaging unit 202 can be inserted into the insertion slot 123, and can be inserted in the correct orientation. Then, the observation unit 200 is inserted into the guide tube 96 from the insertion port 123 in a predetermined direction by the insertion guide means, and the imaging unit 202 is guided to the storage chamber 132.

  The guide tube 96 is disposed inside the insertion portion main body 13 in a state separated from other built-in members, and secures an insertion passage 97 of the insertion guide means. For this reason, the imaging unit 202 of the observation unit 200 is smoothly guided to the storage chamber 132 through the insertion path 97 without interfering with other built-in objects. Further, the insertion path 97 is formed in a cross-sectional shape corresponding to the outer shape of the imaging unit 202. Therefore, the imaging unit 202 is guided to the storage chamber 132 in a predetermined direction, and can be inserted and stored in the storage chamber 132 in that direction. Then, the imaging unit 202 is positioned and fixed by observation unit positioning and fixing means (such as an edge of the storage chamber or an O-ring) while being mounted on the insertion unit main body 13. The tip of the imaging module 226 is fixed at a position determined in a predetermined direction with respect to the observation opening 104. At the same time, the tip of the light guide 224 is positioned in the illumination window 102. The observation unit 200 can be positioned and fixed at a predetermined mounting position with respect to the treatment endoscope 10 by engaging and fixing the cable operating grip portion 205 to the branching member 14 of the treatment endoscope 10. Thereby, the mounting of the observation unit 200 is completed. The treatment endoscope 10 is ready to be used with an illumination function and an observation function by the observation unit 200. The portion of the observation unit 200 that is inserted into the body cavity insertion portion 12 while being attached to the insertion portion main body 13 is attached to the body cavity insertion portion 12 from the outside in a liquid-tight state.

  Next, the case where the assembled treatment endoscope 10 is used will be described. First, the body cavity insertion portion 12 is inserted into the body cavity. While observing the inside of the body cavity with this treatment endoscope, the first operating portion 20 can bend the third bending portion 44, and the second operating portion 22 can bend the first arm portion 32 and the second arm portion 34. In addition, a multi-functional treatment can be performed, for example, a treatment tool is introduced into a body cavity through channels 62, 64, and 66 provided in the treatment endoscope. Also, treatment such as liquid feeding and suction can be performed through the channel. According to this treatment endoscope 10, a multifunctional treatment can be treated minimally invasively.

  After using the treatment endoscope 10, the observation unit 200 can be pulled out from the endoscope main body 100, and the observation unit 200 can be reused after being cleaned, disinfected, and sterilized. In addition, the endoscope main body 100 may be cleaned, disinfected, sterilized, and reused, but may be discarded.

  In this embodiment, the case where a pair of treatment arm portions 32 and 34 are provided in the endoscope main body 100 has been described, but three or more treatment arm portions may be provided. One treatment arm may be provided.

Next, another embodiment will be described.
First, the form shown in FIG. 14 is a modified example of the guide tube 96 in the treatment endoscope 10. The guide tube 96 is provided with a protrusion 151 protruding upward at the upper portion shown in FIG. The protrusion 151 is formed with an engagement recess 152 (positioning portion) that engages with the third wire guide 86 positioned on the upper side shown in FIG. Here, the protrusion 151 may be formed continuously over the entire length of the guide tube 96, but in order to increase the flexibility of the body cavity insertion portion 12, it is not formed continuously but in the longitudinal axis direction of the guide tube 96. It is better to place them partially at intervals.

  In this embodiment, since the positioning portion for restricting the position of the third wire guide 86 in the snake tube portion is provided by engaging the third wire guide 86 with the engagement recess 152, the guide tube 96 in the snake tube portion 46 is provided. The position is fixed and the position of the insertion path 97 can be stabilized. Further, since the guide tube 96 is received by the other built-in group 99 from the lower side, the vertical and horizontal positioning within the flexible tube portion 46 is performed, and the position and posture of the insertion passage 97 of the insertion guide means are stabilized. .

  According to this embodiment, the guide tube 96 having the insertion passage 97 through which the observation unit 200 can be taken in and out of the insertion portion main body 13 is secured separately from the other built-in object group 99, and the position of the guide tube 96 is stabilized. be able to. Therefore, the observation unit 200 can be smoothly guided to a predetermined site near the distal end of the insertion portion main body 13 by the insertion passage 97 formed by the guide tube 96.

  The form shown in FIG. 15 is a modification of the embodiment shown in FIG. This is because not only the upper side in FIG. 15 but also the left and right side surfaces of the guide tube 96 are formed with protrusions 151 and engagement recesses 152 (positioning portions) and engaged with the corresponding third wire guide 86. The recess 152 is engaged. Therefore, since the guide tube 96 is supported by the third wire guide 86 in the left and right and upper directions, the positional stability is increased. Further, since the guide tube 96 is received and supported from the lower side by other built-in objects, the guide tube 96 is positioned in all directions in the vertical and horizontal directions within the serpentine tube portion 46, and the stability of the position and posture of the insertion passage 97 is increased.

  The form shown in FIG. 16 shows another modification of the insertion path 97 in the treatment endoscope 10 described above. In this modification, the insertion path 97 is formed by the wall portion (guide portion) for guiding the observation unit 200 in the third bending portion 44 and the snake tube portion 46 without using the guide tube 96. That is, partition walls (partition walls) 155 (155a, 155b) that are partitioned from built-in objects other than the observation unit 200 are provided, and an insertion passage 97 including a wall portion (guide portion) that guides the observation unit 200 is formed therebetween. As the partition wall 155, a first partition wall 155a that surrounds the third wire guide 86 located on the upper side, and a second partition wall 155b that is located on the lower side and arranged to cover and cover other built-in groups are used. The first partition 155a and the second partition 155b serve as a separating member that forms an insertion passage 97 for inserting the observation unit 200 therebetween. The partition wall (separation member) 155 for separation forms an insertion path 97 in the third bending portion 44 and the snake tube portion 46. Therefore, the observation unit 200 can be guided by the insertion path 97 formed between the first partition 155a and the second partition 155b. The shape of the insertion path 97 is defined so that the imaging unit 202 is guided in a predetermined direction without rotating in the insertion path 97. Also in this case, the shape of the insertion path 97 is determined so that the imaging unit 200 is guided in a predetermined direction without rotating in the insertion path 97.

  By the way, although the partition wall 155 may be formed continuously in the longitudinal axis direction of the insertion portion main body 13, it is not formed continuously in order to increase the flexibility of the insertion portion main body 13, but the longitudinal direction of the insertion portion main body 13. It is good to arrange partially at intervals. The first partition 155a and the second partition 155b may be formed of a resin sheet or a metal foil in a sheet shape so that the partition 155 has flexibility that can be deformed according to the deformation of the insertion portion main body 13.

  The form shown in FIG.17 and FIG.18 is a modification of the separation member (partition wall) mentioned above. The separating member here uses a tube member 157 as a bundling member for bundling a built-in material other than the third wire guide 86 in the third bending portion 44 and the flexible tube portion 46. The tube member 157 is used to form an insertion path 97 into which the observation unit 200 is inserted by bundling a built-in object other than the third wire guide 86 to be separated from the built-in object. As a separating member, as shown in FIGS. 17 and 18, a tube member 157 that surrounds the built-in objects is bundled. Since such a binding means separates the insertion passage 97 for inserting the observation unit 200 from the built-in object disposed in the flexible tube portion 46 and the third bending portion 44 of the insertion portion main body 13, the insertion passage 97 is formed. The insertion path 97 for inserting the observation unit 200 can be easily secured. In the case of this embodiment, as a member that forms the insertion path 97, a partition wall 155a that is partitioned from a built-in object other than the observation unit 200 is also used.

  The tube member 157 may be a heat-shrinkable tube, a tape, or the like. For example, as shown in FIG. The binding member serves as a partition wall (partition wall) that partitions the insertion path 97 from the built-in material other than the observation unit 200. Although the tube member 157 may be formed continuously, as shown in FIG. 18, it is better to dispose the tube member 157 partially apart from each other in order to increase the flexibility of the insertion portion.

  The form shown in FIG.19 and FIG.20 shows the other modification about a separation member (partition wall). Here, the set of the first channel tube 62 and the (first) wire guide 82 of the first bending portion surrounding the first channel tube 62 is in contact with the outer periphery of the first channel tube 62. In a state, they are bundled by a bundling member (first bundling member) 158. In addition, the pair of the second channel tube 64 and the (second) wire guide 82 of the second bending portion surrounding the second channel tube 64 is also in a state where the wire guide 82 of the second bending portion is in contact with the outer periphery of the first channel tube 64. They are bundled by a bundling member (second bundling member) 159. In this way, when the set of each channel tube and the wire guide 82 associated therewith is bound by the binding members 158 and 159, the channel tube and the wire guide are not scattered and are not complicated, and the vicinity of the tube is not complicated. Further, the first binding member 158 and the second binding member 159 serve as a guide portion that forms one wall portion of the insertion passage 97, and the insertion passage 97 is separately formed on the upper portion thereof, thereby stabilizing the insertion passage space. Can be formed continuously in the state. Here, the first bundling member 158 and the second bundling member 159 are separation members that separate and form the insertion path 97 from other built-in objects. Each binding member may be a heat-shrinkable tube or a tape. Further, as shown in FIG. 20, the built-in objects may be bundled in places.

  The form shown in FIG. 21 shows another modification of the separating member (partition wall). In particular, other built-in objects except for the third wire guide 86 are built in the multi-lumen tube 156. The multi-lumen tube 156 constitutes a separating member (separating means) that leaves the space remaining above the multi-lumen tube 156 as an insertion path 97 as a guide portion. Engagement recesses 169 (positioning portions) are formed on the left and right side surfaces and the lower surface of the multi-lumen tube 156 so as to engage with the corresponding third wire guides 86 on the left and right sides and below. These engagement recesses 169 can stabilize the position of the multi-lumen tube 156 in the insertion portion main body 13. In this embodiment, since the plurality of built-in objects are arranged using the lumen of the multi-lumen tube 156, the members of each built-in object can be omitted and the plurality of built-in objects can be gathered in a compact manner. Moreover, since the internal movement of the built-in object can be suppressed, the shape of the insertion path 97 is also stabilized, and the insertion performance of the observation unit 200 is enhanced.

  The form shown in FIG. 22 shows a modification of the imaging unit 202 and the insertion path 97 of the observation unit 200. Here, the basic configuration of the imaging unit 202 is as described above, but a protrusion 161 protruding upward in FIG. 18 is formed on the upper surface of the casing 222 at the tip of the imaging unit 202. Is formed. The protrusion 161 is formed with an engagement recess 162 (positioning portion) that engages with the third wire guide 86 positioned on the upper side.

  Then, when the observation unit 200 is inserted through the insertion path 97, the imaging recess unit 162 of the imaging unit 202 is aligned with the third wire guide 86 positioned on the upper side, and the imaging recess unit 162 is used as a guide unit. I was going to guide you. By providing such a guide part in the image pickup unit unit 202, the image pickup unit 202 can be smoothly inserted and removed without the image pickup unit unit 202 swinging in the insertion path 97 inside the insertion unit main body 13.

  The form shown in FIG. 23 shows a modification of the imaging unit 202 and the insertion path 97 of the observation unit 200. In this embodiment, an engagement recess 162 (positioning portion) is formed not only on the upper side of the image pickup unit unit 202 shown in FIG. 23 but also on the left and right side surfaces of the image pickup unit unit 202. The third wire guides 86 are engaged with each other. Since the engaging recess 162 is formed on the upper side and the left and right side surfaces of the imaging unit 202 as a guide unit, the imaging unit 202 does not need to move further in the insertion path 97, and the imaging unit 202 is smoothly moved to the insertion path 97. It can be inserted and removed.

  The form shown in FIG. 24 shows a modification of the imaging unit 202 and the insertion path 97 of the observation unit 200 described above. In this observation unit 200, the base end portion of the casing 222 of the imaging unit 202 is led out from the rear end of the casing 222 of the imaging unit 202 without being covered with a binding member such as a heat-shrinkable tube 230. . In particular, the signal line 228 and the pair of light guides 224 are covered with a binding member 230 such as a heat-shrinkable tube, and the leading end of the binding member 230 is fastened to the rear end of the casing 222 and does not protrude to the outer periphery of the casing (not covered). ). The part of the members (228, 224) led out from the casing 222 is solidified with a filler 181 filled in the bundling member 230, and this part has a function of preventing folding. The filler 181 may be a known material such as an adhesive, a sealing agent, or a resin, and is not particularly limited.

  The form shown in FIG.25 and FIG.26 shows the modification of the observation unit 200 in each form mentioned above. Here, the member of the cable unit 204 is covered with the coil 159. The front end of the coil 159 is connected to the rear end of the casing 222 by soldering or the like. A wire 160 as a drawing linear member is connected to the rear end of the casing 222. The wire 160 is made of a hard linear member having a relatively low waist. The drawing wire 160 is guided to the hand side of the cable unit 204 through the coil 159.

  When the observation unit 200 is inserted into the treatment endoscope, the observation unit 200 is attached by being pushed in by the coil 159. When detaching the observation unit 200 from the treatment endoscope, the observation unit 200 is pulled out by pulling the pulling wire 160.

  The coil 159 can be used without being fixed to the casing 222 because it can obtain the function of pushing the observation unit 200 without being fixed to the casing 222.

  In addition, as shown in FIG. 27, a pipe 161 may be used instead of the coil 159. The pipe 161 is slidably fitted to the signal line 228 and the pair of light guides 224 that are members of the cable unit 204.

  When the observation unit 200 is attached to the endoscope main body 100, the observation unit 200 is pushed by placing the tip of the pipe 161 against the rear end of the casing 222.

  On the other hand, after the observation unit 200 is attached to the treatment endoscope, the pipe 161 is pulled out. When the observation unit is detached from the treatment endoscope, the observation unit is pulled out by using the pulling wire 160 and pulled out. The distal end portion of the pipe 161 is formed in a tapered shape in which the distal end side widens. The drawing wire 160 can be used in the form of an observation unit that does not use a coil or pipe.

  In the form shown in FIG. 28, cable members such as the signal line 228 and the pair of light guides 224 in the cable unit 204 described above are integrated by extrusion molding.

  In this embodiment, the cable unit portions are bundled with the resin 182 and the cable unit portions are integrated, so that the whole is easily assembled. Also, the cross-sectional shape of the cable unit portion can be easily selected. When the cross-sectional shape similar to the cross-sectional shape of the imaging unit 202 shown in FIG. 27 is formed, the insertion guide performance of the entire observation unit 200 can be improved.

  The forms shown in FIGS. 29A, 29B, and 29C show other modified examples of the treatment endoscope 10. FIG. In this modification, one flexible extension portion 241 is extended from the proximal end of the body cavity insertion portion, and an operation portion 242 is provided at the extension tip of the extension portion 241. The operation unit 242 includes operation means having the functions of the first operation unit (main body operation unit) 20 and the second operation unit (arm unit operation unit) 22 described above. Therefore, since the first operation unit 20 and the second operation unit 22 are not separated from each other, one operator can easily operate both the operation units 20 and 22. In this way, the integrated type in which the operation units are gathered in one place is suitable when the treatment endoscope 10 is used alone without the assistance of an assistant. Other configurations and the like may be the same as those described above.

  The forms shown in FIGS. 30 to 32 show still another modification of the treatment endoscope 10. In this configuration, the observation unit 200 that can be attached to and detached from the body cavity insertion unit 12 is configured only by the imaging unit 202 without an illumination system. The illumination means is configured separately from the observation unit 200 by a light guide 251 made of a fiber fiber bundle or the like, and is incorporated in the endoscope main body 100 separately from the observation unit 200.

  As shown in FIG. 31, a holding member 253 that supports the tip of the light guide 251 is fixedly provided on the second hard portion (tip portion) 42 located at the forefront of the insertion portion main body 13, and the holding member 253 is The positioning portion determines the position of the tip of the light guide 251 in the second hard portion 42.

  The tip of the light guide 251 is positioned and fixed at the inner end position of the illumination window 102 shown in FIG. The proximal end side portion of the light guide 251 is guided from the universal cord 24 to the connection connector 25 through the first extension portion 16 and the first operation portion 20 shown in FIGS. 1 and 2. When the connection connector 25 is detachably connected to a light source device (not shown), the light guide 251 is connected to the light source device. Other configurations may be the same as those described above.

  As shown in FIG. 32, the tip of a guide tube 255 that guides only the imaging unit 202 is attached to the holding member 253. The holding member 253 serves as a positioning member that positions and arranges the distal end opening of the guide tube 255 toward the rear end side entrance portion 134 of the storage chamber 132 that stores the distal end portion of the imaging unit 202. For this reason, when the imaging unit 202 is introduced into the guide tube 255, the distal end portion of the imaging unit 202 is guided to the storage chamber 132 through the guide tube 255.

  The proximal end portion of the guide tube 255 is connected to the branch member 14 at the proximal end of the body cavity insertion portion, and communicates with the insertion port 123 provided in the branch member 14. Thus, the guide tube 255 constitutes an insertion guide means for inserting the observation unit 200 to the distal end of the body cavity insertion portion. Also in the case of this modified example, the observation unit attaching / detaching means for detachably attaching the observation unit 200 to the body cavity insertion portion and the observation unit 200 are positioned and fixed to the body cavity insertion portion as in the case of the above-described embodiment. An observation unit positioning and fixing means is provided. Further, the distal end portion of the imaging unit 202 may have a perfect circular cross-sectional shape, but it has a flat shape such as an ellipse, and crosses the insertion path of the insertion guide means so as to match the shape of the imaging unit unit 202. If the surface shape is formed and the restricting means for determining the direction around the axis of the observation unit is configured, the orientation of the imaging unit 202 inserted into the insertion guide means is easily determined.

  Also, as shown in FIG. 33, the cross-sectional shape of the tip chip 257 of the imaging unit 202 is a perfect circle. Furthermore, a flat portion 258 is formed by cutting out a part of the outer periphery of the tip chip 257. On the other hand, the opening of the observation opening 104 of the second hard portion 42 is formed in accordance with the shape of the tip chip 257. In this case, as shown in FIG. 34, when the tip chip 257 is stored in the storage chamber 132, the flat portion 258 determines the direction around the axis of the tip chip 257.

  Next, as shown in FIG. 35, if an elastic body 260 that covers the tip of the imaging unit unit 202 is disposed on the outer periphery of the imaging unit unit 202, the tip of the imaging unit unit 202 is pushed into and stored in the storage chamber 132. At this time, the distal end portion of the imaging unit 202 can be fixed to the distal end of the body cavity insertion portion. In addition, a liquid-tight means is provided that seals between the periphery of the distal end portion of the imaging unit 202 and the inner surface of the storage chamber 132 to prevent liquid from entering from the outside of the body cavity insertion portion.

  In the above embodiment, a pair of treatment arm portions are provided, but three or more treatment arm portions may be provided. This invention is not limited to the form mentioned above, All the forms performed in the range which does not deviate from the summary of this invention are included. Moreover, it is also possible to combine and form each form.

1 is a perspective view schematically showing an entire treatment endoscope according to one embodiment of the present invention. The schematic explanatory drawing of the whole treatment endoscope which concerns on the same form. (A) is a longitudinal cross-sectional view of the insertion part main body of the said treatment endoscope, (B) is a longitudinal cross-sectional view of the insertion part main body in the state which mounted | wore the said treatment endoscope with the observation unit. The longitudinal cross-sectional view of the serpentine part and curved part in the insertion part main body of the said treatment endoscope. The longitudinal cross-sectional view which cut | disconnected the front-end | tip part in the insertion part main body of the said treatment endoscope, and was seen from the top. The front view of the insertion part of the said treatment endoscope. The cross-sectional view which follows the AA arrow line in FIG. The cross-sectional view which follows a BB arrow line in FIG. The top view of the branch member of the said treatment endoscope. Explanatory drawing which looked at the part of the separation plate in the branch part of the said treatment endoscope from the front. The cross-sectional view of the flexible tube part in the insertion part main body of the said treatment endoscope. (A) is a side view of the imaging unit in the observation unit, (B) is a front view of the imaging unit, and (C) is a plan view of the imaging unit. (A) is a longitudinal cross-sectional view of the imaging part unit in an observation unit, (B) is a cross-sectional view which follows the AA line in FIG. 13 (A). The cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Explanatory drawing of the binding member of the treatment endoscope which concerns on the form shown in FIG. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. The perspective view of the binding member of the treatment endoscope which concerns on the form of FIG. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. Furthermore, the cross-sectional view in the serpentine part of the insertion part main body of the treatment endoscope which concerns on another form. The longitudinal cross-sectional view of the imaging part unit vicinity part in the observation unit which concerns on another form. The longitudinal cross-sectional view of the imaging part unit vicinity part in the observation unit which concerns on another form. FIG. 26 is a cross-sectional view of the vicinity of the cable unit in the observation unit of FIG. The longitudinal cross-sectional view of the imaging part unit vicinity part in the observation unit which concerns on another form. The cross-sectional view of the cable unit vicinity part in the observation unit which concerns on another form. Explanatory drawing which shows the other modification of treatment endoscope. The front view of the front-end | tip part of the treatment endoscope which concerns on another form. The longitudinal cross-sectional view of the front-end | tip part of the treatment endoscope which follows the AA line in FIG. The perspective view of the holding member in the treatment endoscope. Explanatory drawing of the treatment endoscope incorporating the form of the imaging part unit which concerns on another form. Explanatory drawing of the treatment endoscope. The longitudinal cross-sectional view of the front-end | tip part of the treatment endoscope.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Treatment endoscope, 12 ... Body cavity insertion part, 13 ... Insert part main body, 32 ... Treatment arm part, 34 ... Treatment arm part, 44 ... Bending part, 46 ... Serpentine part, 96 ... Guide tube, 97 ... insertion path, 200 ... observation unit.

Claims (19)

An intracorporeal insertion portion provided in the endoscope main body and provided with a main body bending portion at a distal end side portion;
One or more treatment arms having a bending mechanism that is connected to the distal end of the body cavity insertion portion and is bent;
A main body operation unit that is provided on the proximal end side of the body cavity insertion unit and has a first operation means for bending the main body bending unit;
An arm operation unit provided on the proximal end side of the body cavity insertion unit and having a second operation means for bending the treatment arm;
An observation unit having imaging means and signal transmission means for transmitting imaging signal data;
An observation unit attaching / detaching means provided in the body cavity insertion portion, wherein the observation unit is detachably attached to the body cavity insertion portion;
Equipped with,
The observation unit attaching / detaching means includes an insertion guide means that is formed in the body cavity insertion portion and passes the observation unit to the tip of the body cavity insertion portion; and the observation unit that is inserted through the insertion guide means is the body cavity insertion portion. An observation unit positioning fixing means for positioning and fixing to
The insertion guide means is provided on the proximal end side of the body cavity insertion portion, and the insertion port into which the observation unit is inserted, and the observation unit that is formed in the body cavity insertion portion and is inserted through the insertion port. An insertion path that guides to the distal end of the body cavity insertion portion,
The insertion guide means includes a separating member that forms an insertion passage that can be inserted into the body cavity insertion portion and can be inserted through the observation unit by being isolated from a built-in object arranged in the serpentine portion and the bending portion of the body cavity insertion portion,
The separation member is a tubular member, and is disposed in the body cavity insertion portion.
The tubular member has a positioning part that engages with a guide member that guides a wire that bends the bending part in the insertion part in the body cavity and positions the tubular member in the insertion part in the body cavity. Unit separation type treatment endoscope. The observation unit separation type endoscope according to claim 1 , wherein the separation member is a partition wall that partitions the insertion passage from a built-in object other than the observation unit in the insertion portion in the body cavity . The separation member is a member that binds a plurality of built-in objects other than the observation unit and is formed in the body cavity insertion part to form the insertion passage in the body cavity insertion part. 2. The observation unit separation type endoscope according to 1. The observation unit separation type endoscope according to claim 1 , wherein the separation member includes a guide portion that guides the observation unit inserted through the insertion passage . 2. The observation unit separation type endoscope according to claim 1 , wherein the separation member is a multi-lumen tube which is disposed in the body cavity insertion portion and incorporates a plurality of built-in objects other than the observation unit. . The observation unit positioning / fixing means includes tip portion positioning / fixing means for fixing a distal end portion of the observation unit inserted into the body cavity insertion portion at a fixed position at a distal end of the body cavity insertion portion. The observation unit separation type treatment endoscope according to Item 1 . The distal end portion positioning and fixing means fixes the distal end portion of the observation unit to the distal end of the body cavity insertion portion and prevents liquid from entering the insertion passage from the outside of the body cavity insertion portion at the fixed position. The observation unit separation type treatment endoscope according to claim 6 , further comprising means . The distal end portion positioning fixing means has a stopper provided at the distal end of the insertion guide means, and the distal end of the observation unit is abutted against the stopper to determine a position in the insertion direction of the observation unit distal end. The observation unit separation type treatment endoscope according to claim 6 or 7 . The said observation unit attachment / detachment means is provided with the control means which determines the direction around the axis | shaft of the said observation unit with which this observation unit attachment / detachment means is mounted | worn , The claim in any one of Claim 6-8 characterized by the above-mentioned. Observation unit separation type treatment endoscope. A branch portion for branching the main body operation portion and the arm portion operation portion is provided at a proximal end of the body cavity insertion portion, and the main body operation portion is connected via a first extension portion extending from the branch portion. The observation unit separation type treatment according to any one of claims 6 to 9, wherein the arm operation unit is connected via a second extension part extending from the branch part. Endoscope. The observation unit separation type treatment endoscope according to claim 10 , wherein an observation unit insertion port of the observation unit attaching / detaching means is formed in the branch portion . 12. The observation unit separation type treatment endoscope according to claim 11 , further comprising insertion guide means for restricting an insertion direction of the observation unit when the observation unit is inserted into the observation unit insertion port . The one extension part extended from the base end of the said body cavity insertion part was provided, and the said main body operation part and the said arm part operation part were provided in this one extension part, It is characterized by the above-mentioned. The observation unit separation type treatment endoscope according to any one of claims 1 to 12 . The said observation unit has a positioning part engaged with the guide member which guides the wire which curves the said bending part, and is guided by this guide member, The claim in any one of Claim 1-13 characterized by the above-mentioned. The observation unit separation type endoscope according to the item . The observation unit is integrated by covering an imaging unit including an imaging unit and an illumination unit and a cable unit including cables connected to the imaging unit and the illumination unit with a heat shrink material. observation unit separation endoscope according to any one of claims 13 claim 1, characterized in that there. The observation unit includes an imaging unit including an imaging unit and an illumination unit, and a cable unit including cables connected to the imaging unit and the illumination unit, and the cable unit is covered with a coil member. observation unit separation endoscope as claimed in any one of claims 13, characterized in that the. The said observation unit has an imaging part unit containing an imaging part and an illumination part, The linear member for extraction was connected to the said imaging part unit, The claim in any one of Claim 1-13 characterized by the above-mentioned. The endoscope described. The observation unit separation type treatment endoscope according to any one of claims 1 to 17, wherein the observation unit includes an illumination unit that illuminates a visual field to be observed. The observation unit separation type treatment endoscope according to any one of claims 1 to 18, wherein the observation unit includes an imaging unit separated from an illuminating unit that illuminates a visual field to be observed.

Images