Insertion devices and endoscopes

Abstract

The insertion device of the present invention comprises: a tube (30) having a channel hole (32) and a connecting hole (32s); a frame member (41) having a tube insertion hole (46) and a forceps channel (47a) and arranged so as to cover the periphery of the connecting hole (32s); and a closing member (70) which closes the channel hole (32) in the tube (30) at a position closer to the base end side than the connecting hole (32s) and is arranged so as to have a front end surface (73s) facing the connecting hole (32s).

Description

Technical Field

[0001] The present invention relates to an insertion device and an endoscope including a tube having a hole formed along the long axis of an insertion portion inserted into a subject. Background Art

[0002] In recent years, insertion devices, such as endoscopes, have become widely used in the medical field. Endoscopes, by inserting a slender insertion portion into a body cavity, allow for observation of internal organs within the cavity. Alternatively, more detailed observations or various procedures can be performed using surgical instruments or known sub-endoscopes inserted into the tube of the endoscope (the mother endoscope). A mother endoscope is an endoscope with the insertion portion of a sub-endoscope inserted into its channel.

[0003] Also known as channels are tubes provided in the insertion portion and operation portion of an endoscope and having holes (hereinafter referred to as first holes) through which treatment instruments, sub-endoscopes, guide wires, etc. are freely inserted, and forceps channels communicating with the tubes.

[0004] The first hole of the tube extends along the long axis of the insertion portion (hereinafter simply referred to as the long axis).

[0005] Furthermore, the distal end of the first hole in the direction along the longitudinal axis (hereinafter simply referred to as distal end) opens as a treatment instrument protrusion opening at the distal end surface of the insertion portion.

[0006] The forceps channel communicating with the first hole branches from a portion located within the operating portion of the tube in a direction intersecting the long axis (hereinafter referred to as a cross direction). The forceps channel opens into a treatment instrument insertion port provided in the operating portion.

[0007] Therefore, such a tube has a structure such that when a treatment instrument, a sub-endoscope, a guide wire, etc. is inserted from the treatment instrument insertion port, these inserted objects are inserted into the first hole through the forceps channel and protrude from the treatment instrument protrusion port.

[0008] Furthermore, in order to reduce the diameter of the insertion portion, the insertion portion is formed of a multi-lumen tube having a plurality of holes along the longitudinal axis, and a structure is also known in which one of the plurality of holes is used as the first hole.

[0009] When using such a multi-lumen tube, a connecting hole is formed on the outer peripheral surface of the multi-lumen tube in a cross direction so as to communicate with the first hole, and a forceps channel is provided as a third hole of the frame member so as to communicate with the connecting hole within a frame member that has a second hole for insertion of the base end side (hereinafter referred to as the base end side) along the long axis of the multi-lumen tube and is arranged so as to cover the periphery of the connecting hole.

[0010] Thus, Japanese Patent Application Laid-Open No. 2004-249008 discloses a structure in which the insertion portion is formed of a multi-lumen tube, and the forceps channel communicates with a communication hole formed on the outer peripheral surface of one of the plurality of holes in the multi-lumen tube within a frame member.

[0011] However, the following method is known: in an endoscope having a thin-diameter insertion portion, such as a choledochoscope, a pyelureteroscope, an enteroscope, or a bronchoscope, a guide wire previously retained in the body cavity is inserted through the first hole from the protruding port of the treatment instrument toward the insertion port of the treatment instrument, thereby inserting the insertion portion deep into the body cavity via the guide wire.

[0012] Therefore, at this time, the guide wire enters the first hole from the treatment instrument protrusion port, moves toward the proximal end side in the first hole, enters the forceps channel from the communication hole, and protrudes from the treatment instrument insertion port.

[0013] However, when the guide wire enters the forceps channel from the first hole, it may get caught around the communicating hole, making it difficult for the guide wire to smoothly enter the forceps channel.

[0014] The above situation is not limited to the mother endoscope, but also applies to the daughter endoscope, and also applies to a structure in which the insertion portion is composed of a tube other than a multi-lumen tube and a tube is provided in the insertion portion as a channel.

[0015] Furthermore, the present invention is not limited to endoscopes, and is also applicable to treatment instruments and the like that are inserted into a body cavity via a guide wire.

[0016] The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an insertion device having a structure that allows a guide wire to smoothly enter a forceps channel from a first hole of a tube via a communicating hole. Summary of the Invention

[0017] Means for solving problems

[0018] In order to achieve the above-mentioned purpose, an insertion device of one embodiment of the present invention comprises: a tube having a first hole formed along the long axis of the insertion part inserted into the subject and a connecting hole connected to the first hole and opening in a direction intersecting the long axis; a frame member having a second hole for inserting the base end side of the tube along the direction of the long axis and a third hole connected to the first hole via the connecting hole, and arranged to cover the surrounding of the connecting hole; and a closing member, which closes the first hole in the tube at a position closer to the base end side along the direction of the long axis than the connecting hole, and is arranged so that the front end surface of the front end located along the direction of the long axis faces the connecting hole.

[0019] In addition, another embodiment of the insertion device of the present invention comprises: a tube having a first hole formed along the long axis of the insertion portion inserted into the subject and a connecting hole connected to the first hole and opening in a direction intersecting the long axis; a frame member having a second hole for inserting the base end side of the tube along the direction of the long axis and a third hole connected to the first hole via the connecting hole, and being arranged to cover the periphery of the connecting hole; and a closing member which closes the first hole in the tube at a position closer to the base end side along the direction of the long axis than the connecting hole, and whose front end surface at the front end along the direction of the long axis is positioned closer to the front end side than the base end of the connecting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a plan view showing an endoscope apparatus including a sub-endoscope according to the present embodiment and a main endoscope used in combination with the sub-endoscope.

[0021] Figure 2 yes Figure 1 Partial top view of the sub-endoscope.

[0022] Figure 3 It means setting Figure 2 A schematic diagram of the structure of the tube module within the operation unit.

[0023] Figure 4 yes Figure 3 Exploded perspective view of the tube module.

[0024] Figure 5 yes Figure 3 A perspective view of the tube module.

[0025] Figure 6 It means from Figure 5 A three-dimensional view of the pipe module with the closing components removed.

[0026] Figure 7 It is from Figure 5 VII direction observation Figure 5 Top view of the tube module.

[0027] Figure 8 It is along Figure 7 Cross-sectional view of the tube module of line VIII-VIII.

[0028] Figure 9 yes Figure 4 An enlarged perspective view of the closing component in the tube module.

[0029] Figure 10 It is from Figure 9 X direction observation Figure 9 A top view of the closure component.

[0030] Figure 11 yes Figure 2 Magnified stereoscopic image of the sub-endoscope.

[0031] Figure 12 It is from Figure 11 XII direction observation Figure 11 Side view of the sub-endoscope.

[0032] Figure 13 It is from Figure 11 XIII direction observation Figure 11 Side view of the sub-endoscope.

[0033] Figure 14 It is from Figure 11 XIV direction observation Figure 11 Main view of the sub-endoscope.

[0034] Figure 15 The hole of the fixing belt is fixed on the Figure 11 A three-dimensional diagram of the state of the hook for fixing the belt in the sub-endoscope.

[0035] Figure 16 It is from Figure 15 XVI direction observation Figure 15 Side view of the sub-endoscope.

[0036] Figure 17 Yes Figure 11 A partial side view of a state in which the operating portion of a daughter endoscope is fixed to the operating portion of a mother endoscope by a fixing belt.

[0037] Figure 18 yes Figure 11 An enlarged top view of the fixing belt used to fix the sub-endoscope.

[0038] Figure 19 It is from Figure 18 XIX direction observation Figure 18 Side view of the fixing strap.

[0039] Figure 20 It is shown in Figure 14 A top view of a structure in which an insertion portion holder is provided near the anti-bend portion in the operating portion of a sub-endoscope.

[0040] Figure 21 It will Figure 20 A perspective view showing an enlarged portion of the insertion portion holder and a portion of the operation portion.

[0041] Figure 22 It will Figure 21 A perspective view showing a modified example of the shape of the insertion portion holder together with a portion of the operation portion.

[0042] Figure 23 It will Figure 21 A perspective view showing another modified example of the shape of the insertion portion holder together with a portion of the operation portion.

[0043] Figure 24 It will Figure 21 A perspective view showing still another modified example of the shape of the insertion portion holder together with a portion of the operation portion.

[0044] Figure 25 It means Figure 8 A cross-sectional view of a pipe module according to a modified example in which the front end surface of the sealing member is formed into a hemispherical shape. DETAILED DESCRIPTION

[0045] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the present embodiment described below, the insertion device will be described by taking an example of a child endoscope in an endoscope apparatus having a mother-child endoscope.

[0046] Figure 1 FIG2 is a top view showing an endoscope apparatus including a sub-endoscope according to the present embodiment and a main endoscope used in combination with the sub-endoscope. Figure 2 yes Figure 1 Partial top view of the sub-endoscope.

[0047] in addition, Figure 3 It means setting Figure 2 A schematic diagram of the structure of the pipe module within the operating unit, Figure 4 yes Figure 3 Exploded perspective view of the tube module.

[0048] also, Figure 5 yes Figure 3 A three-dimensional view of the tube module, Figure 6 It is shown from Figure 5 A perspective view of the pipe module with the closing components removed. Figure 7 It is from Figure 5 VII direction observation Figure 5 Top view of the tube module.

[0049] in addition, Figure 8 It is along Figure 7 A cross-sectional view of the tube module of line VIII-VIII, Figure 9 yes Figure 4 An enlarged perspective view of the closing component in the pipe module, Figure 10 It is from Figure 9 X direction observation Figure 9 A top view of the closure component.

[0050] like Figure 1As shown, the endoscope apparatus 1 includes a main endoscope 10 and a sub-endoscope 20 used in combination with the main endoscope 10 , and constitutes a main part.

[0051] The mother endoscope 10 has the following parts as its main components: a slender insertion part 11, which is inserted into the subject; an operating part 12, which is connected to the base end side of the insertion part 11 in the longitudinal direction; a universal cable 17, which extends from the operating part 12; and an endoscope connector 17a, which is arranged at the extended end of the universal cable 17 and can be freely loaded and unloaded on external equipment such as a light source device (not shown).

[0052] The insertion portion 11 includes a distal end portion 13 , a bending portion 14 , and a flexible tube portion 15 in this order from the distal end side in the longitudinal direction, and constitutes a main portion.

[0053] Disposed inside the distal end portion 13 are, for example, an imaging unit including an objective optical system and an image sensor such as a CCD or CMOS, an illumination optical system for irradiating illumination light transmitted by a light guide bundle, and the like (none of which are shown).

[0054] The mother endoscope 10 is, for example, a so-called side-viewing endoscope in which the optical axes of the imaging unit and the illumination optical system are inclined at a predetermined angle with respect to the longitudinal direction of the insertion portion 11 .

[0055] The distal end portion 13 is provided with an opening 13a that opens to the side, and the distal end of a treatment instrument channel (not shown) inserted into the interior of the insertion portion 11 is connected to the opening 13a. Figure 8 ) and the like, an insertion portion 21 of the sub-endoscope 20, which will be described later, can also be inserted therethrough.

[0056] Furthermore, the opening 13a is provided with a treatment instrument lifting stand (not shown) for lifting the treatment instrument, the guide wire 300 , the insertion portion 21 of the sub-endoscope 20 , and the like protruding from the opening 13a through the treatment instrument channel.

[0057] The bending portion 14 is configured to be actively bendable in all directions around the insertion axis including the up-down and right-left directions. The flexible tubular portion 15 is configured from a flexible tubular member that is passively bendable.

[0058] A treatment instrument insertion portion 16 is provided at the distal end of the operation portion 12, which is the insertion portion 11 side. The proximal end of the treatment instrument channel communicates with the treatment instrument insertion portion 16. A forceps plug 16a is detachably attached to the treatment instrument insertion portion 16.

[0059] Furthermore, a pair of bending operation knobs 18 for bending the bending portion 14 and an operation lever 19 for operating the treatment instrument lifting platform are provided on the proximal end side of the operation portion 12 away from the insertion portion 11 .

[0060] In the above description, the mother endoscope 10 is described as a side-viewing endoscope. However, it may be a so-called direct-viewing endoscope that observes a position forward of the distal end portion 13 in the longitudinal direction.

[0061] The sub-endoscope 20 mainly includes an elongated insertion portion 21 that is inserted into a subject and an operation portion 22 that is connected to a proximal end of the insertion portion 21 .

[0062] The insertion portion 21 extends from the longitudinal axis L (see Figure 2 ) in the direction N (hereinafter referred to as the direction N) and the front end side (hereinafter referred to as the front end side) sequentially comprises a front end portion 23, a bending portion 24 and a flexible tube portion 25 to constitute the main parts.

[0063] Similar to the above-described mother endoscope 10 , an imaging unit, an illumination optical system (none of which are shown) for irradiating illumination light onto a subject, and the like are provided inside the distal end portion 23 .

[0064] In the present embodiment, the sub-endoscope 20 is described as a so-called direct-view endoscope in which the optical axes of the imaging unit and the illumination optical system are set along the long axis L as an example.

[0065] Furthermore, an observation window in the imaging unit, an illumination window in the illumination optical system, a water supply nozzle, various openings, and the like are provided on the front end surface of the front end portion 23 .

[0066] The bending portion 24 is configured to be actively and freely bent in four directions, for example, upward, downward, leftward, and rightward, in accordance with an operation of a bending operation knob 26 (to be described later) provided on the operation portion 22 .

[0067] The flexible tube portion 25 is composed of a flexible tubular member that can be passively bent. In this embodiment, the flexible tube portion 25 is composed of a flexible tube 30. Alternatively, the tube 30 may be provided inside the flexible tube portion 25.

[0068] The tube 30 has a hole inside thereof extending from the distal end side to the proximal end side along the long axis L. Alternatively, the tube 30 may be formed of a so-called multi-lumen tube having at least two holes.

[0069] Hereinafter, in this embodiment, a case where the tube 30 is formed of a multi-lumen tube will be described as an example.

[0070] Specifically, if Figure 4As shown, in this embodiment, the tube 30 is composed of a multi-lumen tube having 8 holes, for example, and the 8 holes include: an observation hole 31, through which an image guide bundle (or a signal line of a camera unit) and an optical bundle are inserted; a channel hole 32 as the first hole, which serves as a suction channel and also functions as a channel for insertion of a disposal instrument; a pair of water supply holes 33; and 4 wire insertion holes 34, through which 4 wires not shown in the figure, connected to the bending operation knob 26, are inserted.

[0071] In addition, the number of holes formed in the tube 30 is not limited to 8, and may be any number.

[0072] In addition, not only the flexible tube portion 25 but also the bending portion 24 may be formed of the tube 30 .

[0073] return Figure 1 The operating portion 22 is provided with: a pair of bending operation knobs 26 for bending the bending portion 24; and a handle for placing a treatment instrument, a guide wire 300 (see Figure 8 ) The disposal instrument inserted into the channel hole 32 is inserted through the insertion connector 27.

[0074] Furthermore, cables and tubes 28 including an image guide bundle, a light guide bundle, a suction tube 28 a , a water supply tube 28 b , and the like extend from the operation unit 22 .

[0075] In the sub-endoscope 20 of this embodiment, the above-mentioned imaging unit may be provided in the operation portion 22. In this case, instead of extending the image guide bundle from the operation portion 22, a signal cable connected to the imaging unit extends from the operation portion 22.

[0076] And, as Figure 2 As shown, one end of a fixing belt 29 for fixing the operating portion 22 to the operating portion 12 of the mother endoscope 10 is fixed to the operating portion 22, and a fixing belt hook 141 is provided for locking the other end of the fixing belt 29 wrapped around the operating portion 12 when fixing.

[0077] In addition, Figures 11 to 19 The structure of the fixing belt 29 and the fixing belt hook 141 and the method of fixing the operating portion 22 to the operating portion 12 will be described later in the description of FIG.

[0078] Here, the treatment instrument insertion joint 27 and the suction tube 28a are connected to the channel hole 32 on the proximal end side of the tube 30. In addition, the water supply tube 28b is connected to a pair of water supply holes 33.

[0079] In order to achieve these connections, in this embodiment, as Figure 3 As shown, a tube module 40 is provided on the base end side of the tube 30 .

[0080] like Figures 3 to 8 As shown, the pipe module 40 includes a frame member 41. The frame member 41 includes a main body portion 45 and a branch portion 47 communicating with the main body portion 45, and constitutes a main portion.

[0081] Note that the frame member 41 may be entirely integrally formed using, for example, a 3D printer, or may be formed by combining two members that are separately molded.

[0082] The frame member 41 is made of a material having good sliding properties, such as polycarbonate, polypropylene, polyethylene, or polyacetal. The material constituting the frame member 41 is not limited to these materials as long as it has good sliding properties.

[0083] The frame member 41 is provided in the operating portion 22 so as to cover the outer peripheral surface 30g (see Figure 4 ) is maintained in a manner surrounding the communicating hole 32s on the tube 30, whereby the proximal end side of the tube 30 (ie, the proximal end side of the insertion portion 21) and the operation portion 22 are continuously provided.

[0084] like Figure 4 As shown, a communication hole 32s and a pair of water supply communication holes 33a are formed on the base end side of the tube 30.

[0085] Specifically, the communication hole 32 s communicates with the passage hole 32 and is formed along the intersecting direction K.

[0086] In addition, each water supply communication hole 33 a is a hole that allows the inner peripheral surface of each water supply hole 33 to communicate with the outer peripheral surface 30 g of the tube 30 in a direction substantially perpendicular to the direction N.

[0087] The communication hole 32 s and the water supply communication hole 33 a are formed at positions offset with respect to the direction N in a region on the base end side of the tube 30 .

[0088] Specifically, the communication hole 32s is formed at a position offset toward the distal end side of the pair of water supply communication holes 33a.

[0089] In addition, in this embodiment, a structure in which a pair of water supply communication holes 33a are provided in the pipe 30 corresponding to the pair of water supply holes 33 is shown as an example, but when there is only one water supply hole 33, the water supply communication hole 33a can be formed at one location of the pipe 30.

[0090] In addition, when there are three or more water supply holes 33 , it is sufficient to form the water supply communication holes 33 a at three or more locations in the tube 30 .

[0091] like Figure 4As shown, the main body 45 is formed in a cylindrical shape along the long axis L. A tube insertion hole 46 serving as a second hole for inserting the proximal end of the tube 30 is formed in the main body 45 along the direction N.

[0092] The tube insertion hole 46 is formed of a through hole having an inner peripheral surface having an inner diameter larger than that of the outer peripheral surface 30 g of the tube 30 , and the through hole has a step.

[0093] Specifically, if Figure 3 、 Figure 4 As shown, the tube insertion hole 46 comprises, for example, the following parts in sequence from the front end side, constituting a main part: a first insertion hole portion 46a having an inner diameter sufficiently larger than the outer diameter of the tube 30, a second insertion hole portion 46b having an inner diameter smaller than the first insertion hole portion 46a (slightly larger than the outer diameter of the tube 30), and a third insertion hole portion 46c having an inner diameter larger than the second insertion hole portion 46b (for example, the same diameter as the first insertion hole portion 46a).

[0094] Furthermore, a branch portion 47 extending in the intersecting direction K is integrally formed on the main body 45 . The treatment instrument insertion joint 27 is connected to the extending end of the branch portion 47 in the intersecting direction K.

[0095] Moreover, a branch pipe 49 for suction is integrally formed at a midway position of the branch portion 47 in the intersecting direction K. Moreover, the branch pipe 49 for suction is connectable to the suction pipe 28a.

[0096] A forceps channel 47 a serving as a third hole is formed in the branch portion 47 and the treatment instrument insertion sleeve 27 .

[0097] The forceps channel 47a is connected to the second insertion hole portion 46b. Figure 8 As shown, the central axis J of the forceps channel 47a forms an acute angle θ with the long axis L.

[0098] Furthermore, a suction branch line 49 a of the suction branch pipe 49 branches off from a midway position in the intersecting direction K of the forceps channel 47 a .

[0099] The first insertion hole 46 a constitutes a portion on the front end side of the main body 45 into which the cylindrical connection sleeve 150 is fitted and engaged.

[0100] The connection joint 150 holds an O-ring 55 that watertightly holds the outer peripheral surface 30 g of the tube 30 and the inner peripheral surface of the tube insertion hole 46 .

[0101] In addition, the second insertion hole portion 46b is formed to have a smaller diameter than the first insertion hole portion 46a, thereby forming a first stopper portion 46e protruding toward the inside of the tube insertion hole 46 at the base end of the first insertion hole portion 46a in the direction N (hereinafter referred to as the base end).

[0102] Furthermore, the O-ring 55 comes into contact with the first stopper portion 46 e and is restricted from moving toward the proximal end side, thereby positioning the O-ring 55 within the connection sleeve 150 .

[0103] Furthermore, the O-rings 55 are in close contact with the outer peripheral surface 30 g of the tube 30 and the inner peripheral surface of the connection joint 150 , whereby the gap between the tube 30 and the connection joint 150 is sealed airtightly and liquid-tightly by each O-ring 55 .

[0104] The second insertion hole portion 46 b is provided corresponding to the communication hole 32 s opened in the outer peripheral surface 30 g of the tube 30 .

[0105] The tube 30 is positioned in the tube insertion hole 46 so that the communication hole 32s is located in the second insertion hole portion 46b, whereby the channel hole 32 formed in the tube 30 communicates with the forceps channel 47a via the communication hole 32s.

[0106] The third insertion hole portion 46 c is provided corresponding to the water supply communication hole 33 a opened in the outer peripheral surface 30 g of the tube 30 .

[0107] In addition, if Figure 5 、 Figure 7 、 Figure 8 As shown in FIG. 1 , a locking claw portion (hereinafter simply referred to as a claw portion) 50 having four claws 51 is inserted into the third insertion hole portion 46c. In addition, the claw portion 50 is integrally formed with the branch pipe 48 for water supply.

[0108] Furthermore, a branched water supply conduit 48a communicating with the third insertion hole 46c is formed in the branched water supply conduit 48. The water supply pipe 28b and the branched water supply conduit 48 are freely connectable.

[0109] Furthermore, an O-ring 60 , a cylindrical spacer 61 , an O-ring 62 , and an annular adjustment ring 63 are inserted into the claw portion 50 in order from the base end side of the main body portion 45 .

[0110] The second insertion hole portion 46b is formed to have a smaller diameter than the third insertion hole portion 46c, and thus a second stopper portion 46f is formed at the front end of the third insertion hole portion 46c to protrude toward the inside of the tube insertion hole 46.

[0111] The O-ring 60 and the claw 50 abut against the second stopper 46f and are restricted from moving toward the distal end, thereby positioning the claw 50, O-ring 60, spacer 61, O-ring 62, and adjustment ring 63 within the third insertion hole 46c.

[0112] Specifically, the O-ring 60 is positioned on the front end side of the water supply communication hole 33a and the water supply branch pipe 48a in the third insertion hole 46c by abutting against the second stopper 46f.

[0113] Furthermore, by making the O-ring 60 positioned in this way tightly contact the outer peripheral surface 30g of the hose 30 and the inner peripheral surface of the claw 50, the gap between the outer peripheral surface 30g of the hose 30 and the claw 50 is sealed airtightly and liquid-tightly by the O-ring 60 at a position closer to the front end side than the water supply connecting hole 33a and the water supply branch pipe 48a.

[0114] The spacer 61 is positioned in the third insertion hole 46c at a position corresponding to the opening of the water supply communication hole 33a and the water supply branch pipe 48a by abutting against the O-ring 60 (i.e., abutting against the second stopper 46f via the O-ring 60).

[0115] The spacer 61 includes a substantially cylindrical wall portion 61 a , which is disposed with a predetermined gap between the tube 30 and the third insertion hole portion 46 c (tube insertion hole 46 ).

[0116] Furthermore, a communication hole 61 b ​​is formed in the wall portion 61 a of the spacer 61 , which communicates the inner surface side and the outer surface side of the wall portion 61 a .

[0117] Then, by arranging the spacer 61 having the communication hole 61b at a position corresponding to the water supply communication hole 33a and the opening of the water supply branch pipe 48a, the pair of water supply holes 33 formed in the tube 30 are connected to the water supply branch pipe 48a.

[0118] The O-ring 62 is positioned in the claw portion 50 closer to the base end side than the water supply communication hole 33a and the water supply branch conduit 48a by abutting against the spacer 61 (ie, abutting against the second stopper 46f via the O-ring 60 and the spacer 61).

[0119] Furthermore, by bringing the thus positioned O-ring 62 into close contact with the outer circumferential surface 30g of the hose 30 and the inner circumferential surface of the claw 50, the gap between the outer circumferential surface 30g of the hose 30 and the claw 50 at a position closer to the base end than the water supply communication hole 33a and the water supply branch pipe 48a is sealed airtightly and liquid-tightly by the O-ring 62. The O-ring 60, the spacer 61, and the O-ring 62 are pre-formed integrally.

[0120] The adjustment ring 63 is positioned on the base end side in the claw portion 50 by abutting against the O-ring 62 (ie, abutting against the second stopper portion 46 f via the O-ring 60 , the spacer 61 , and the O-ring 62 ).

[0121] A closing member 70 for closing the base end of the claw portion 50 is fitted into and held in the claw portion 50 .

[0122] like Figure 9 、 Figure 10 As shown, the closing member 70 mainly includes a cover 74 for closing the claw portion 50 and a pin-shaped sealing member 73 extending from a front end surface 74 s of the cover 74 toward the front end side.

[0123] When the cover 74 is inserted into the claw 50 and the base end of the claw 50 is closed, Figure 8 As shown, the sealing member 73 is inserted into the channel hole 32 from the proximal opening 32h of the channel hole 32 toward the distal end, thereby sealing the proximal portion of the channel hole 32 relative to the communication hole 32s.

[0124] Thus, when suction is performed from the suction branch line 49 a through the forceps channel 47 a , the communication hole 32 s , and the channel hole 32 , airtightness is ensured on the proximal end side of the channel hole 32 by the sealing member 73 .

[0125] The sealing member 73 is made of a material that is harder than the tube 30 and has a hardness sufficient to prevent deformation even when pressed toward the proximal end by a guide wire, such as polycarbonate, polypropylene, polyethylene, or polyacetal.

[0126] Furthermore, a front end surface 73 s located at the front end of the sealing member 73 is located at a position exposed to the communicating hole 32 s in the passage hole 32 so as to face the communicating hole 32 s .

[0127] Furthermore, when the lid 74 closes the base end of the claw 50, a pin-shaped sealing member 79 is inserted into the base end of each water supply hole 33. Thus, the base end of each water supply hole 33 is also sealed by the sealing member 79. Alternatively, the sealing member 79 may be integrally formed on the front end surface 74s of the lid 74.

[0128] Furthermore, through holes 77 penetrating along the long axis L are provided in the cover 74 at positions corresponding to the observation hole 31 and the wire insertion holes 34 .

[0129] When the cover 74 closes the base end of the claw 50 , the image guide bundle and the light guide bundle can be inserted into the observation hole 31 via the through hole 77 , and wires can be inserted into the wire insertion holes 34 .

[0130] Furthermore, a flange portion 72 serving as a locking portion protruding in the radially outer direction is provided on the outer peripheral surface of the cover body 74 .

[0131] like Figure 5 As shown, the flange portion 72 is engaged with the claw 51 of the claw portion 50 , thereby holding the cover 74 in the claw portion 50 with the position of the cover 74 in the rotational direction relative to the claw portion 50 restricted.

[0132] Alternatively, the claw portion 50 may be formed integrally with the main body portion 45 .

[0133] In addition, if Figure 8 As shown, the cover body 74 is embedded in the claw portion 50 until the front end surface 74s abuts the step portion 52, wherein the step portion 52 is formed at the base end of the third insertion hole portion 46c in the longitudinal direction N of the inner peripheral surface of the claw portion 50.

[0134] At this time, the tube 30 is pushed toward the distal end side in the claw portion 50 by the closing member 70 , so that the proximal end position of the tube 30 on the long axis L is automatically positioned relative to the main body 45 .

[0135] Thus, the major axis L of the tube 30 is automatically positioned within the claw portion 50 , the communication hole 32 s is arranged within the second insertion hole portion 46 b , and the water supply communication hole 33 a is arranged within the third insertion hole portion 46 c .

[0136] Furthermore, along with the positioning of the closing part 70 of the above-mentioned flange portion 72 in the rotational direction relative to the claw 51, the tube 30 in the tube insertion hole 46 is automatically positioned in the rotational direction around the long axis L, and in the second insertion hole portion 46b, the connecting hole 32s is arranged at a position consistent with the forceps channel 47a.

[0137] The O-ring 60 , the spacer 61 , and the O-ring 62 are sandwiched between the second stopper 46 f and the cover 74 via the adjustment ring 63 , thereby being held in a state of being positioned at predetermined positions relative to the second stopper 46 f .

[0138] The sealing member 73 inserted into the channel hole 32 from the proximal opening 32h and sealing the proximal portion of the channel hole 32 relative to the communicating hole 32s is positioned so that its distal end surface 73s faces the communicating hole 32s.

[0139] Specifically, the entire distal end surface 73s is positioned at least entirely distal to the proximal end 32sp of the communicating hole 32s. The proximal end 32sp is the proximal end in the direction N of the portion where the communicating hole 32s intersects with the channel hole 32.

[0140] Here, if Figure 8 As shown, the front end surface 73s of the channel hole 32 facing the communication hole 32s is formed in a shape that smoothly connects the channel hole 32 and the forceps channel 47a in a positioned state.

[0141] Specifically, the front end surface 73 s is formed as an inclined surface at least partially parallel to the central axis J or with the long axis L, at an angle θ′ smaller than the angle between the central axis J and the long axis L.

[0142] In addition, the shape that smoothly connects the channel hole 32 of the distal end surface 73 s and the forceps channel 47 a is not limited to an inclined surface, and may be a curved surface or the like.

[0143] The other structures of the pipe module 40 are the same as those in the related art.

[0144] Thus, in this embodiment, the seal member 73 that seals the portion of the channel hole 32 closer to the proximal end than the communicating hole 32s is positioned so that the inclined distal end surface 73s faces the communicating hole 32s.

[0145] In addition, it is shown that a portion of the front end surface 73 s is formed parallel to the central axis J, or the angle θ′ formed with the long axis L is smaller than the angle formed between the central axis J and the long axis L.

[0146] Therefore, when the guide wire 300 is inserted from the distal end side to the proximal end side of the channel hole 32 and enters the forceps channel 47a through the communicating hole 32s, the guide wire 300 does not get caught around the communicating hole 32s due to the distal end surface 73s.

[0147] Therefore, the guide wire 300 can be smoothly guided from the channel hole 32 to the forceps channel 47 a .

[0148] Thus, when the insertion portion 21 of the sub-endoscope 20 is inserted into the body cavity via the guide wire 300 inserted into the treatment instrument channel of the mother endoscope 10 , a smooth insertion operation can be performed.

[0149] Thus, it is possible to provide the sub-endoscope 20 having a structure that allows the guide wire 300 to smoothly enter the forceps channel 47 a from the first hole 32 of the tube 30 through the communicating hole 32 s.

[0150] Furthermore, in the above-described embodiment, the insertion device is described using the daughter endoscope 20 as an example, but the present invention is not limited thereto and can also be applied to the mother endoscope 10. Specifically, it can also be applied to the tube module included in the mother endoscope 10. Furthermore, it can also be applied to other treatment instruments having a tube 30 that are inserted into a body cavity via a guide wire 300.

[0151] In the above embodiment, the case where the insertion portion 21 is formed of the tube 30 and the tube 30 is formed of a multi-lumen tube is described as an example, but the present invention is not limited thereto and can also be applied to a case where the tube 30 is formed of only one hole.

[0152] Next, use Figures 11 to 19 , a structure for fixing the operating portion 22 of the sub-endoscope 20 to the operating portion 12 of the main endoscope 10 using the fixing belt 29 will be described.

[0153] Figure 11 yes Figure 2 Magnified stereoscopic image of the sub-endoscope, Figure 12 It is from Figure 11 XII direction observation Figure 11 Side view of the sub-endoscope, Figure 13 It is from Figure 11 XIII direction observation Figure 11 Side view of the sub-endoscope, Figure 14 It is from Figure 11 XIV direction observation Figure 11 Main view of the sub-endoscope.

[0154] in addition, Figure 15 It means that the hole of the fixing belt is set at Figure 11 A three-dimensional diagram of the state in which the fixing belt of the sub-endoscope is hooked. Figure 16 It is from Figure 15 XVI direction observation Figure 15 Side view of the sub-endoscope.

[0155] and, Figure 17 It shows Figure 11 A partial side view of a state in which the operating portion of the daughter endoscope is fixed to the operating portion of the mother endoscope by a fixing belt, Figure 18 is used for Figure 11 An enlarged top view of the fixing belt of the sub-endoscope, Figure 19 It is from Figure 18 XIX direction observation Figure 18 Side view of the fixing strap.

[0156] In addition, the following Figures 11 to 17 The sub-endoscope 20 shown is different from the sub-endoscope 20 shown in the above-mentioned embodiment. The cable / tube 28 does not extend directly from the operating part 22, but the cable / tube 28 is inserted through the universal cable 120 extending from the operating part 22 and the endoscope connector 121 provided at the extended end of the universal cable 120.

[0157] However, as mentioned above Figure 2As shown, when fixing the operating part 22 of the sub-endoscope 20 to the operating part 12 of the mother endoscope 10, the operator first presses the pressing surface of the operating part 22 on the side opposite to the surface on which the bending operating knob 26 is provided against the pressed surface of the operating part 12 on which the bending operating knob 18 is provided.

[0158] At this time, the pressed surface of the operating portion 12 is formed in a concave shape, and the pressing surface of the operating portion 22 is formed in a convex shape, so the contact area during pressing becomes larger.

[0159] Next, the operator places one end 29e (refer to Figure 18 ) The treatment instrument fixed to the operation portion 22 is inserted through the fixing belt 29 on the side of the insertion joint 27 and is wound around the operation portion 12, so that the other end 29t (refer to Figure 18 ) side hole 29i (refer to Figure 11 ) is locked to the fixing belt hook 141 provided on the operation portion 12.

[0160] Thus, the operation portion 22 is fixed to the operation portion 12 via the fixing belt 29 .

[0161] However, the operator generally wears gloves when performing the fixing operation. Therefore, when the hole 29i of the fixing belt 29 is locked with the fixing belt hook 141, a part of the glove is caught in the locking portion, making the fixing operation difficult.

[0162] Therefore, a structure that can easily engage the hole 29i of the fixing belt 29 with the fixing belt hook 141 with good workability is desired.

[0163] Therefore, in Figures 11 to 19 In the structure of the sub-endoscope 20 shown, a large finger grip 29 g to be gripped by the operator's fingers is provided on the other end 29 t side of the fixing belt 29 .

[0164] like Figure 18 、 Figure 19 As shown, in order to improve the gripping properties of the operator's fingers, the gripping surface 29m of the finger grip 29g has a gently curved shape.

[0165] Furthermore, in order to further improve the gripping properties of the finger grip 29g, a fine step may be formed on the gripping surface 29m, or a non-slip process such as coating may be performed.

[0166] In addition, if Figure 18 As shown, the hole 29i is formed offset from the finger grip portion 29g toward the one end 29e side.

[0167] In addition, conventionally, a hole 29i is formed at the position of the finger grip 29g. In this structure, the hole 29i is located at a position offset to the one end 29e side than conventionally, and the finger grip 29g is set as a dedicated portion for the operator's fingers to grip.

[0168] Therefore, in the past, the hole 29i was formed at the position of the finger grip 29g. Therefore, when the hole 29i was locked to the hook 141 for the fixing belt, the operator held the part where the hole 29i was formed, so there was a high possibility that the glove would be caught in the locking part (between the hole 29i and the hook 141 for the fixing belt).

[0169] However, in this structure, the hole 29i is formed offset from the finger grip 29g, so the operator can easily and simply grip the finger grip 29g and lock the hole 29i with the belt hook 141 without getting the glove caught in the locking portion.

[0170] And, as Figure 13 As shown, the hook 141 for fixing the belt is located on the side C2 opposite to the side C1 on which the bending operation knob 26 and the insertion joint 27 of the treatment instrument are provided relative to the central axis C of the operating portion 22, and is located on the upper side D1 (on the side opposite to the insertion portion 21 in the operating portion 22) than the central axis D of the bending operation knob 26.

[0171] Therefore, if Figure 15 、 Figure 16 As shown, when the hole 29i is locked in the hook 141 for the fixing belt, even if a finger grip portion 29g is formed on the fixing belt 29, in other words, even if the hole 29i is formed offset from the finger grip portion 29g to the side of one end 29e as described above, after being locked, the finger grip portion 29g and the other end 29t do not contact the bending operation knob 26, the bending locking rod 226, etc.

[0172] Furthermore, since the hole 29i is locked to the belt hook 141 on the C2 side, the locking position does not interfere with the insertion of the treatment instrument into the joint 27, unlike the structure in which the hole 29i is locked to the belt hook 141 on the C1 side.

[0173] Therefore, the sub-endoscope 20 can be operated comfortably regardless of whether it is fixed using the fixing belt 29 or not.

[0174] Based on the above, the following structure of the sub-endoscope 20 can be provided: Figure 17 As shown, the fixing belt 29 is used to fix the operating part 22 to the operating part 12. When the hole 29i is locked to the fixing belt hook 141, the glove will not be pinched by the locking part. In addition, the fixing belt 29 will not interfere with the bending operation knob 26, bending locking rod 226, etc. of the operating part 22.

[0175] However, when the operating portion 22 of the sub-endoscope 20 is fixed to the operating portion 12 of the mother endoscope 10 using the fixing belt 29 as described above, when the insertion portion 21 of the sub-endoscope 20 is pulled out from the treatment instrument channel of the mother endoscope 10 and other treatment instruments are inserted into the treatment instrument channel from the treatment instrument insertion portion 16, since the operating portion 22 is fixed to the operating portion 12, the sub-endoscope 20 cannot be moved to other parts unless the fixation is released.

[0176] Therefore, in order to keep the insertion portion 21 clean after being pulled out when the sub-endoscope 20 is fixed to the mother endoscope 10, it is necessary to have someone other than the operator hold the insertion portion 21, or move it to a place where the sub-endoscope 20 can be released and kept clean, which leads to the problem of complicated operations.

[0177] Below, use Figures 20 to 24 The diagram shows a structure for easily and simply holding the insertion portion 21 of the child endoscope 20 pulled out from the treatment instrument channel of the mother endoscope 10 in a fixed state where the child endoscope 20 is fixed to the mother endoscope 10 , while maintaining cleanliness.

[0178] Figure 20 It means in Figure 14 A top view of a structure in which an insertion portion holder is provided near the anti-bending portion of the operating portion of the sub-endoscope, Figure 21 It will Figure 20 A perspective view showing an enlarged portion of the insertion portion holder and a portion of the operation portion.

[0179] in addition, Figure 22 It will Figure 21 A perspective view showing a modified example of the shape of the insertion portion holder together with a portion of the operation portion, Figure 23 It will Figure 21 A perspective view showing another modified example of the shape of the insertion portion holder together with a portion of the operation portion, Figure 24 It will Figure 21 A perspective view showing another modified example of the shape of the insertion portion holder together with a portion of the operation portion.

[0180] like Figure 20 As shown, an insertion portion holder 155 is provided near the anti-bend member 190 in the operating portion 22 of the sub-endoscope 20 .

[0181] like Figure 21 As shown, the insertion portion holder 155 is formed in a ring shape having a hole 155i into which the insertion portion 21 is inserted.

[0182] In addition, the insertion portion holder 155 can be Figure 22 As shown in the figure, it can be formed into a C shape. Figure 23As shown relative to Figure 21 The directions of the two electrodes are arranged in a circular shape at a difference of approximately 90°. Figure 24 As shown, the insert holder 155 can also be relative to Figure 22 The insertion portion holder 155 is provided in a C-shape in directions that differ by approximately 90 degrees. The insertion portion holder 155 may have any shape as long as it can hold the insertion portion 21, but is not limited to these shapes.

[0183] According to such a structure, the insertion part 21 pulled out from the disposal instrument channel of the mother endoscope 10 is only embedded in the hole 155i of the insertion part holder 155. Even when the child endoscope 20 is fixed to the mother endoscope 10, the fixation will not be released, and there is no need for others to hold the insertion part 21. The insertion part 21 can be prevented from falling and kept clean.

[0184] Furthermore, when the insertion portion 21 is held by the insertion portion holder 155 , the holding position is near the operation portion 22 , so that operability is improved when reinserting the insertion portion 21 into the treatment instrument channel of the mother endoscope 10 .

[0185] In addition, the following uses Figure 25 Indicates a modification example. Figure 25 Yes Figure 8 A cross-sectional view of a pipe module according to a modified example in which the front end surface of the sealing member is formed into a hemispherical shape.

[0186] like Figure 25 As shown, the front end surface 73s of the sealing member 73 may be formed in a hemispherical shape, and the front end surface 73s may be positioned at least on the front end side of the base end 32sp of the communication hole 32s.

[0187] Thus, when the guide wire 300 is inserted from the distal end side of the channel hole 32 to the proximal end side and enters the forceps channel 47a through the communicating hole 32s, the guide wire 300 can be smoothly guided from the channel hole 32 to the forceps channel 47a by the hemispherical distal end surface 73s located more distally than the proximal end 32sp of the communicating hole 32s, depending on the thickness of the guide wire 300 and the shape of the distal end of the guide wire 300. Other effects are the same as those of the present embodiment described above.

Claims

1. An insertion device, characterized in that The insertion device comprises: a tube having a first hole and a communicating hole; a frame member disposed so as to cover the periphery of the communicating hole; and a closure member having a front end face formed at a front end, The first hole is formed along the long axis of the insertion portion inserted into the subject. The communicating hole is formed along a direction intersecting the long axis, the communicating hole is communicated with the first hole, and the communicating hole opens on the outer surface of the tube. The frame member is formed with a second hole and a third hole. The base end of the tube is inserted into the second hole. The third hole communicates with the communication hole. The closing member is inserted from the proximal opening of the first hole to close the first hole at a position closer to the proximal side than the communicating hole. The closing member is positioned such that the distal end surface is closer to the distal side than the proximal end of the communicating hole.

2. The insertion device according to claim 1, characterized in that The front end surface of the closing member is formed in a shape that smoothly connects the first hole and the third hole.

3. The insertion device according to claim 1, characterized in that The central axis of the third hole forms an acute angle with the long axis.

4. The insertion device according to claim 3, characterized in that A portion of the front end surface of the closing member is formed to be parallel to the central axis, or a portion of the front end surface of the closing member is formed to form an angle smaller than an angle formed between the central axis and the long axis.

5. The insertion device according to claim 1, characterized in that The tube is a multi-lumen tube.

6. The insertion device according to claim 5, characterized in that The first hole is one of the plurality of holes formed in the multi-lumen tube. The communication hole is formed on the outer peripheral surface of the multi-lumen tube so as to communicate with the first hole.

7. The insertion device according to claim 1, characterized in that The closing member has a locking portion locked to the frame member.

8. The insertion device according to claim 2, characterized in that The shape that smoothly connects the first hole and the third hole is a curved surface.

9. The insertion device according to claim 1, characterized in that The front end surface is formed in a hemispherical shape.

10. An endoscope, characterized in that: The endoscope comprises: a tube having a first hole and a communicating hole; an operating portion provided on a proximal end side of an insertion portion inserted into a subject; a frame member disposed so as to cover the periphery of the communicating hole; and a closure member having a front end face formed at a front end, The first hole is formed along the long axis of the insertion portion, The communicating hole is formed along a direction intersecting the long axis, is communicated with the first hole, and opens on the outer surface of the tube. The frame member is formed with a second hole and a third hole. The base end of the tube is inserted into the second hole. The third hole communicates with the communication hole. The closing member is inserted from the proximal opening of the first hole to close the first hole at a position closer to the proximal side than the communicating hole. The closing member is positioned such that the distal end surface is closer to the distal side than the proximal end of the communicating hole.

11. The endoscope according to claim 10, wherein: The front end surface of the closing member is formed in a shape that smoothly connects the first hole and the third hole.

12. The endoscope according to claim 10, wherein: The central axis of the third hole forms an acute angle with the long axis.

13. The endoscope according to claim 12, wherein: A portion of the front end surface of the closing member is formed to be parallel to the central axis, or a portion of the front end surface of the closing member is formed to form an angle smaller than an angle formed between the central axis and the long axis.

14. The endoscope according to claim 10, wherein: The tube is a multi-lumen tube.

15. The endoscope according to claim 14, characterized in that The first hole is one of the plurality of holes formed in the multi-lumen tube. The communication hole is formed on the outer peripheral surface of the multi-lumen tube so as to communicate with the first hole.

16. The endoscope according to claim 10, wherein: The closing member has a locking portion locked to the frame member.

17. The endoscope according to claim 11, wherein The shape that smoothly connects the first hole and the third hole is a curved surface.

18. The endoscope according to claim 10, wherein: The front end surface is formed in a hemispherical shape.

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