JP6952861B2 - Standing operation wire and endoscope - Google Patents

Description

The present invention relates to an upright operating wire and an endoscope.

In an endoscope, various treatment tools are introduced from a treatment tool introduction port provided in a hand operation unit (hereinafter referred to as "operation unit"), and the treatment tool is opened to a tip member of an insertion portion. It is taken out from the tool outlet and used for treatment. For example, a duodenal endoscope uses a treatment tool such as forceps or a contrast tube, and an ultrasonic endoscope uses a treatment tool such as a puncture needle. In such a treatment tool, in order to treat a desired position in the subject, it is necessary to change the direction in which the treatment tool is derived from the treatment tool outlet. For this reason, the tip member is provided with a treatment tool standing table (hereinafter referred to as "standing table"), and the endoscope is provided with a treatment tool that changes the posture of the standing table between the standing position and the lying position. An upright mechanism is provided.

As a treatment tool standing mechanism, a wire traction type mechanism in which the tip of a wire (also referred to as a forceps raising wire) is directly attached to a standing base is known (see Patent Document 1). In this mechanism, the base end side of the wire is connected to the standing operation lever (also referred to as the forceps raising lever) provided in the operation unit, and the standing table is rotated by pushing and pulling the wire with the standing operation lever. It is rotated around an axis to change its posture between an upright position and a prone position.

More specifically, the operation portion of Patent Document 1 is provided with a grip portion for holding the operation portion by hand and an angle knob. In this operation portion, a wire opening is provided below the grip portion, and a drive shaft opening is provided in the grip portion. The base end of the wire is led out from the wire opening, and the drive shaft opening is used. The tip of the drive shaft moved by the forceps raising lever is derived. The tip of the drive shaft and the base end of the wire are detachably connected to the connector, and a protective cover covering the connector is detachably provided on the operation unit.

By the way, when an endoscope is used for various examinations or treatments, the fluid in the body cavity adheres to the tip member of the insertion portion including the stand and the guide tube through which the wire is inserted. The endoscope is cleaned and disinfected with a disinfectant solution. At that time, since the diameter of the guide tube is small and the wire is inserted inside, cleaning is troublesome.

Therefore, in the endoscope of Patent Document 1, a cover covering the tip member of the insertion portion, a stand, and a wire are detachably provided, and the cover, the stand, and the wire are removed to guide the tip member of the insertion portion and the wire. Cleaning the tube.

On the other hand, Patent Document 2 discloses an endoscope in which the base end of a cable cord is derived from the base end of a control handle and the base end of the cable cord is connected to a collet. The collet is fastened to the nut and is moved in the front-rear direction by the operating lever.

Japanese Unexamined Patent Publication No. 6-315458 European Patent No. 1759626

However, since the endoscope of Patent Document 1 has a configuration in which the connector which is the standing operation mechanism is housed in the narrow inside of the operation portion, there is a problem that the operation of attaching / detaching the base end of the wire to the standing operation mechanism becomes complicated. was there.

Further, the endoscope of Patent Document 1 has a problem that the operation unit becomes large by the amount that the connector of the standing operation mechanism is housed inside the operation unit.

On the other hand, in the endoscope of Patent Document 2, the cable cord is led out to the outside of the control handle, and the tip of the cable cord is detachably attached to the collet and the nut, but the attachment / detachment operation is complicated. In addition, when the cable cord is pulled out to the outside and connected to the standing operation mechanism in a detachable manner, if the stand and cable cord are made of metal such as stainless steel, a high-frequency treatment tool is used. At that time, there is a concern that the current may leak to the outside through the treatment tool stand or the cable cord.

The present invention has been made in view of such circumstances, the detachment operation of the wire against the upright operation Organization can be easily performed, it is possible to prevent the current from leaking to the outside without deteriorating the operability standing It is an object of the present invention to provide an operation wire and an endoscope.

In order to achieve the object of the present invention, the standing operation wire of the first aspect is the standing operation wire for operating the treatment tool standing stand provided at the tip of the insertion portion of the endoscope, and is the standing operation wire of the standing operation wire. An engaging member provided on the tip side, a conductive wire having a tip fixed to the engaging member, a base end locking portion provided on the base end side of the standing operation wire, and a base end locking. An insulating wire having a fixed base end portion, a connecting member connecting the base end portion of the conductive wire and the tip end portion of the insulating wire, and an insulating property juxtaposed with the insulating wire. And the members of.

In the standing operation wire of the second aspect, the insulating member is a tube-shaped member that covers the exposed outer circumference of the insulating wire.

In the standing operation wire of the third aspect, the insulating member is a rod-shaped member.

In the standing operation wire of the fourth aspect, the breaking strength of the insulating wire is 100 N or more, and the elongation rate of the insulating wire when pulled at 50 N is 5% or less.

In the standing operation wire of the fifth aspect, the insulating wire is composed of liquid crystal polyester fibers.

The standing operation wire of the sixth aspect has a brazing portion or a caulking portion for fixing the conductive wire and the connecting member, and a caulking portion for fixing the insulating wire and the connecting member.

The endoscope of the seventh aspect is an operation portion provided with an operation member and an insertion portion provided on the tip end side of the operation portion and inserted into a subject, and is a soft portion and a curved portion from the operation portion side. The above-mentioned standing operation in which the insertion portion including the portion and the tip portion, the treatment tool standing table provided at the tip portion, and the engaging member are connected to the treatment tool standing table, and the base end locking portion is connected to the operating member. With a wire.

In the endoscope of the eighth aspect, an insulating member, to a more instrument raiser member in pushing operation of the operation member reaches the maximum collapsed position, has a pressure is high buckling strength applied to the insulating member ..

In the endoscope of the ninth aspect, the connecting member is arranged in the flexible portion.

In the endoscope of the tenth aspect, the connecting member is arranged on the tip end side of the flexible portion.

In the endoscope of the eleventh aspect, a movable member that is exposed to the outside of the operation unit and operates in conjunction with the operation of the operation member is provided at the base end of the standing operation wire and is detachably engaged with the movable member. It is provided with a mounting member.

In the endoscope of the twelfth aspect, one of the movable member and the mounting member is provided with an engaging hole, and the other is provided with an engaging portion that is detachably engaged with the engaging hole.

In the endoscope of the thirteenth aspect, the engaging portion is provided with an elastically deforming portion that elastically deforms and engages with the engaging hole.

In the endoscope of the fourteenth aspect, the elastically deformed portion is formed with a pair of elastically deformable claws that are locked to the edge of the engaging hole, and the engaging hole and the engaging portion are engaged or engaged with each other. At the time of disengagement, the pair of claws are displaced in the direction of being brought closer to each other by elastic deformation.

According to the standing operation wire and the endoscope of the present invention, it is easy to attach / detach and prevent current from leaking to the outside.

Configuration diagram of an endoscope system including an endoscope according to an embodiment Perspective view of the tip member in which the stand is located in the inverted position Perspective view of the tip member in which the standing table is located in the standing position Enlarged perspective view of the stand Cross-sectional view of the main part showing the attachment structure of the stand to the tip member A perspective view illustrating the other side surface facing one side surface of the operation unit shown in FIG. Enlarged perspective view engagement member via the guiding part for engagement is accommodated in the accommodation groove Operation diagram engaging member is accommodated in the accommodating groove is induced in the induction part for engagement Configuration diagram showing the overall configuration of the standing operation mechanism Side view of the standing operation mechanism of FIG. Perspective view of the connected structure A perspective view of the connecting structure shown in FIG. 11 as viewed from the left side. Perspective view of the wire assembly of the first aspect Front view of mounting member Perspective view of the extension portion showing the introduction port and the movable member Explanatory drawing in which the wire is inserted from the introduction port with the engaging member at the top. Explanatory drawing of the mounting member in a state where the tip of the wire is connected to the upright stand Explanatory drawing in which a mounting member is connected to a movable member Cross-sectional view showing the state where the valve body is attached to the introduction port Enlarged perspective view of the wire of the second aspect Sectional view of the wire of the second aspect Sectional view of the wire of the second aspect Enlarged perspective view of the wire of the third aspect Cross-sectional view taken along the line I-I of FIG. 23 Explanatory drawing showing a modified example of a connected structure Sectional sectional view of the main part of the connecting structure shown in FIG. Perspective view of another connected structure Assembled perspective view of the connecting structure shown in FIG. 27. FIG. 27 is a cross-sectional view of a main part of the connecting structure shown in FIG. Top view showing the size of the engaging portion with respect to the engaging hole Assembly perspective view of another connecting structure Top view of the engaging hole showing the size of the engaging portion with respect to the engaging hole Perspective view of another connected structure Assembled perspective view of the connecting structure shown in FIG. 33. Main structure in which the first slider and lever are connected by a link sheet metal, which is a link mechanism. Operation explanatory view of the link mechanism of FIG. 35 Perspective view of the wire of the fourth aspect Perspective view of the tip member Perspective view of the wire of the fifth aspect Perspective view of the tip member

Hereinafter, preferred embodiments of the endoscope according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an endoscope system 12 including an endoscope 10 according to an embodiment of the present invention. The endoscope system 12 includes an endoscope 10, a processor device 14, a light source device 16, and a display 18. Note that FIG. 1 also shows a treatment tool 56 used in the endoscope system 12.

The endoscope 10 includes an operation unit 22 provided with a standing operation lever 20 which is an operation member, and an insertion unit 24 provided on the tip end side of the operation unit 22.

Further, as shown in the perspective views of FIGS. 2 and 3 showing the configuration of the tip portion 26 of the insertion portion 24, the tip portion 26 of the insertion portion 24 is provided with a tip member 28, and the tip member 28 is erected, which will be described later. The base 30 is attached. FIG. 2 is a perspective view of the tip member 28 in which the standing table 30 is located in the inverted position, and FIG. 3 is a perspective view of the tip member 28 in which the standing table 30 is located in the standing position.

In the following description, the upward direction refers to the Z (+) direction of FIGS. 1 and 2, and the downward direction refers to the Z (−) direction of FIGS. 1 and 2. The right direction refers to the X (+) direction in FIG. 2, and the left direction refers to the X (−) direction in FIG. Further, the Y (+) direction of FIGS. 1 and 2 points to the tip end side direction of the tip member 28, and the Y (−) direction of FIGS. 1 and 2 points to the proximal end side direction of the tip member 28.

Returning to FIG. 1, the operation unit 22 extends from the operation unit main body 32 provided with the standing operation lever 20, the grip portion 34 connected to the operation unit main body 32, and the grip portion 34 toward the tip side. It has an extension portion 36, and a base end portion of the insertion portion 24 is provided on the tip end side of the extension portion 36 via a break prevention pipe 38. The grip portion 34 is a portion gripped by the operator when operating the endoscope 10.

The extension portion 36 is provided from the tip end portion to the tip end side of the grip portion 34 in order to provide a part of the components of the movable member 96 (see FIG. 6) and the standing operation mechanism 120 (FIGS. 9 and 10) described later. It is a part of the non-grasping area extended toward. Specifically, the region A from the tip end 44A of the convex mount portion 44 of the treatment tool introduction port 42 provided in the grip portion 34 to the base end portion 38A of the breakage prevention pipe 38 corresponds to the extension portion 36. do. A tubular flange 40 is provided in the area of the extension portion 36.

The operation unit main body 32 of the operation unit 22 is provided with a universal cord 46. A light source connector 50 is provided on the tip side of the universal cord 46, and an electric connector 48 is branched and provided on the light source connector 50. The electric connector 48 is provided in the processor device 14, and the light source connector 50 is provided in the light source device 16. Connected to.

The insertion portion 24 is configured by connecting the tip portion 26, the curved portion 52, and the soft portion 54 from the tip end side to the base end side.

The following contents are provided inside the insertion portion 24. That is, the operation of changing the lead-out direction of the treatment tool channel 58 that guides the tip portion 56A of the treatment tool 56 of FIG. 1 to the tip member 28 of FIG. 2 and the tip portion 56A of the treatment tool 56 that is led out from the tip member 28. An upright operation wire 60 (hereinafter referred to as a wire 60) for carrying out the operation, an upright operation wire channel 62 (hereinafter referred to as a wire channel 62) for guiding the tip of the wire 60 to the tip member 28, and a light source of FIG. A light guide (not shown) that guides the illumination light supplied from the device 16 to the tip member 28 of FIG. 2, an air supply / water supply tube (not shown), an angle wire (not shown), and a signal cable (not shown). Etc. are provided.

Returning to FIG. 1, the operation unit 22 is configured to have a substantially cylindrical shape as a whole, and has a cylindrical axis B along the Y (+) −Y (−) direction. A pair of angle knobs 64, 64 for bending the curved portion 52 are arranged on the side surface 22A on one side of the vertical cross section of the operating portion 22 including the cylindrical shaft B. The pair of angle knobs 64, 64 are provided coaxially and rotatably.

The curved portion 52 has a structure in which a plurality of angle rings (not shown) are rotatably connected to each other. The curved portion 52 is formed by covering the outer periphery of the structure with a tubular net body woven with a metal wire, and covering the outer peripheral surface of the net body with a rubber tubular outer skin. For example, four angle wires (not shown) are arranged from the curved portion 52 configured in this way to the angle knobs 64 and 64, and these angle wires can be squeezed by rotating the angle knobs 64 and 64. The curved portion 52 is curved up, down, left and right by the push-pull operation.

Further, the air supply / water supply button 66 and the suction button 68 are arranged side by side on the operation unit main body 32 of the operation unit 22. By operating the air supply / water supply button 66, air and water can be ejected from the air supply / water supply nozzle 70 provided on the tip member 28 of FIG. Further, by operating the suction button 68 of FIG. 1, body fluid such as blood can be sucked from the suction port that also serves as the treatment tool outlet 72 provided on the tip member 28 of FIG.

Further, the grip portion 34 of the operation portion 22 of FIG. 1 is provided with a treatment tool introduction port 42 for introducing the treatment tool 56. The treatment tool 56 introduced from the treatment tool introduction port 42 with the tip portion 56A at the head is inserted into the treatment tool channel 58 of FIG. 2 inserted through the insertion portion 24, and the treatment tool guide provided on the tip member 28. It is derived to the outside from the exit 72.

Further, on one side surface 22A of the operation unit 22 of FIG. 1, a standing operation lever 20 is rotatably provided coaxially with the angle knobs 64 and 64. The standing operation lever 20 is rotationally operated by the operator who grips the grip portion 34. When the standing operation lever 20 is rotated, the wire 60 of FIG. 2 is pushed and pulled by the standing operation mechanism 120 (see FIGS. 9 and 10) that operates in conjunction with the rotation operation of the standing operation lever 20. The posture of the standing table 30 connected to the tip side of the 60 is changed between the standing position in FIG. 3 and the lodging position in FIG. The above-mentioned standing operation mechanism 120 will be described later.

The flexible portion 54 shown in FIG. 1 has a spiral tube (not shown) formed by spirally winding a thin metal strip having elasticity. The flexible portion 54 is formed by covering the outside of the spiral tube with a tubular net body woven with a metal wire, and covering the outer peripheral surface of the net body with a tubular outer skin made of resin.

The endoscope 10 of the embodiment configured as described above is a lateral endoscope used as a duodenal endoscope, and the insertion portion 24 is inserted into the subject through the oral cavity. The insertion portion 24 is inserted from the esophagus through the stomach to the duodenum, and a predetermined examination or treatment is performed.

In the embodiment, as the treatment tool 56, a biopsy forceps having a cup capable of collecting biological tissue at the tip portion 56A has been exemplified, but the present invention is not limited thereto. For example, as another treatment tool, a treatment tool such as a contrast tube or a knife for EST (Endoscopic Sphincterotomy) is used.

Next, the tip portion 26 of the insertion portion 24 will be described.

As shown in FIG. 2, the tip portion 26 of the insertion portion 24 is composed of a tip member 28 and a cap 76 that is detachably attached to the tip member 28. The cap 76 is formed in a substantially cylindrical shape with the tip side sealed, and a substantially rectangular opening window 76A is formed on a part of the outer peripheral surface thereof. When the cap 76 is attached to the tip member 28, the opening window 76A of the cap 76 communicates with the treatment tool outlet 72 of the tip member 28. As a result, the tip portion 56A of the treatment tool 56 derived from the treatment tool outlet 72 is led out from the opening window 76A.

Cap 76, a material with elasticity, for example, fluorine rubber or rubber material such as silicone rubber, polysulfone, or polycarbonate is composed of a resin material such as Ney bets, at its base end side is formed on the tip member 28 It has an engaging portion (not shown) that engages with a groove (not shown), and is attached to the tip member 28 by engaging this engaging portion with the groove of the tip member 28. Further, when the treatment of the endoscope 10 is completed, the cap 76 is removed from the tip member 28 and washed and disinfected, or is discarded as disposable.

The tip member 28 is made of a metal material having corrosion resistance. Further, the tip member 28 is integrally provided with a partition wall 78 projecting toward the tip side and a partition wall 80 facing the partition wall 78. An upright stand accommodating chamber 82 for accommodating the upright stand 30 is formed between the partition wall 78 and the partition wall 80. A treatment tool outlet 72 for leading the treatment tool 56 to the outside is formed on the base end side of the standing table storage chamber 82, and the tip end portion of the treatment tool channel 58 is connected to the treatment tool outlet 72.

The treatment tool channel 58 is inserted into the insertion portion 24 of FIG. The base end portion of the treatment tool channel 58 is connected to the tip pipe 202 of the branch pipe 200 (see FIG. 10) provided inside the operation unit 22.

The branch pipe 200 has a well-known structure, and the base end portion is branched into two pipe lines 204 and 206, and a treatment tool introduction port 42 is formed at the base end of one of the pipe lines 204. Therefore, the tip 56A of the treatment tool 56 introduced from the treatment tool introduction port 42 to the treatment tool channel 58 via the conduit 204 is inserted into the treatment tool channel 58 and stands up from the treatment tool outlet 72 of FIG. It is led out to the pedestal storage chamber 82. Then, the leading end portion 56A of the treatment tool 56 led out to the standing table accommodating chamber 82 changes its out-out direction according to the posture between the standing position and the lying position of the standing table 30 arranged in the standing table accommodating chamber 82. Will be done. Further, the tip of the suction pipe 208 for sucking body fluid such as blood is connected to the base end of the other pipe line 206 of the branch pipe 200 shown in FIG.

FIG. 4 is an enlarged perspective view of the standing table 30. As shown in FIG. 4, a guide surface 30A is provided on the upper surface of the standing table 30. Along the guide surface 30A, the tip portion 56A of the treatment tool 56 of FIG. 1 is led out from the opening window 76A of the cap 76 of FIG.

As shown in FIG. 4, the standing table 30 is provided with rotating shafts 84 and 86 on both side surfaces of the base portion 30B. The axial direction of the rotating shafts 84 and 86 is set in the X (+)-X (-) direction of FIG. 2 when the standing table 30 is attached to the tip member 28.

FIG. 5 is a cross-sectional view of a main part showing a structure for attaching the upright stand 30 to the tip member 28. As shown in FIG. 5, the axes of the rotating shafts 84 and 86 are coaxially arranged via the base portion 30B of the upright stand 30, and the rotating shaft 84 is rotatably fitted to the concave bearing portion 78A of the partition wall 78. The rotating shaft 86 is rotatably fitted to the concave bearing portion 80A of the partition wall 80. Further, the rotating shafts 84 and 86 are mounted on the bearing portions 78A and 80A with a predetermined amount of play x in the axial direction of the rotating shafts 84 and 86, respectively. When the rotation shafts 84 and 86 are offset to one side by using this backlash amount x, a part of one of the bearing portions 78A and 80A is exposed, and a brush can be easily applied to the exposed portion. Since it can be inserted, the cleanability of the bearing portions 78A and 80A is improved.

As shown in FIGS. 2 and 3, an optical system accommodating chamber 88 is provided inside the partition wall 78. An illumination window 90 and an observation window 92 are arranged adjacent to each other in the upper part of the optical system accommodation chamber 88, and an air supply / water supply nozzle 70 directed to the observation window 92 is provided on the tip member 28. The air supply water supply nozzle 70 is connected to an air supply water supply device (not shown) inserted through the insertion unit 24 via an air supply water supply tube (not shown), and the air supply water supply button 66 of the operation unit 22 shown in FIG. By operating the above, air or water is ejected from the air supply / water supply nozzle 70 toward the observation window 92. As a result, the observation window 92 is cleaned.

Further, an illumination unit (not shown) and a photographing unit (not shown) are housed inside the optical system storage chamber 88. The illumination unit includes an illumination lens (not shown) installed inside the illumination window 90, and a light guide (not shown) arranged so that the tip surface faces the illumination lens. The light guide is arranged on the universal cord 46 from the insertion portion 24 of the endoscope 10 via the operation portion 22, and its base end is connected to the light source device 16 via the light source connector 50. As a result, the irradiation light from the light source device 16 is transmitted via the light guide and is irradiated to the outside through the illumination window 90.

The above-mentioned photographing unit includes a photographing optical system (not shown) arranged inside the observation window 92 and a CMOS (complementary metal oxide semiconductor) type or CCD (charge coupled device) type image pickup device (not shown). ing. The image pickup device is connected to the processor device 14 via a signal cable (not shown) inserted through the insertion section 24 of FIG. The image pickup signal of the subject image obtained by the photographing unit is output to the processor device 14 via the signal cable, image-processed, and then displayed as the subject image on the display 18.

Although overlapping with the above description, first, the wire 60 will be described. As shown in FIGS. 2 and 3, the tip side of the wire 60 is arranged outside the outlet 74 and is connected to the upright stand 30. Further, the base end side of the wire 60 is arranged outside the introduction port 94 provided in the operation unit 22 as shown in FIG. 6, and is connected to the movable member 96 (see FIG. 10). The outlet 74 is an example of the tip opening of the present invention, and the introduction port 94 is an example of the base end opening of the present invention.

FIG. 6 is a perspective view of the operation unit 22, and is a perspective view showing the other side surface 22B facing one side surface 22A of the operation unit 22 shown in FIG.

According to FIG. 6, the introduction port 94 is provided in the extension portion 36 of the operation portion 22. A mounting member 98 is provided at the base end of the wire 60 arranged outside from the introduction port 94, and the mounting member 98 is detachably mounted in an engaging hole (described later) of the movable member 96. ..

The operation unit 22 is provided with a movable member 96. The movable member 96 is arranged so as to be exposed to the outside of the operation unit 22, and operates in conjunction with the operation of the standing operation lever 20 by the standing operation mechanism 120 described later. Further, in the embodiment, the movable member 96 is rotatably arranged on the other side surface 22B facing the one side surface 22A provided with the angle knobs 64 and 64, but the movable member 96 with respect to the operation unit 22 The arrangement position is not limited, and it may be rotatably arranged at a predetermined position of the operation unit 22. Further, the movable member 96 is a driven lever that rotates in conjunction with the rotation operation of the standing operation lever 20.

The standing operation mechanism 120 is arranged inside the operation unit 22, and operates the movable member 96 in conjunction with the operation of the standing operation lever 20. Therefore, when the standing operation lever 20 is operated, the movable member 96 operates via the standing operation mechanism 120, and the wire 60 (see FIG. 2) connected to the movable member 96 is pushed and pulled. The standing operation mechanism 120 will be described later.

Next, an engaging structure in which the tip of the wire 60 is engaged with and disengaged from the upright stand 30 will be described.

Returning to FIGS. 2 and 3, the wire 60 is provided with an engaging member 100 at the tip thereof. Further, the standing table 30 is provided with a housing groove 102 that is detachably engaged with the engaging member 100 and has an opening 104 formed on the X (+) direction side. As a result, the engaging member 100 provided at the tip of the wire 60 is accommodated in the accommodating groove 102 through the opening 104, so that the tip of the wire 60 is connected to the upright stand 30.

In the embodiment, the engaging member 100 is a sphere, and the accommodating groove 102 is a spherical recess for accommodating the spherical engaging member 100. The shapes of the engaging member 100 and the accommodating groove 102 are not limited to the above shapes, but the engaging member 100 is a sphere and the accommodating groove 102 is a spherical recess to push and pull the wire 60. The sliding resistance between the engaging member 100 and the accommodating groove 102 caused by the operation can be reduced. Therefore, the push-pull operation of the wire 60 can be smoothly performed.

Further, the tip member 28 is provided with an engaging guide portion 106 which is connected to the accommodating groove 102 at the upright position of FIG. The engaging guide portion 106 has a function of guiding the engaging member 100 led out from the outlet 74 to the opening 104 of the accommodating groove 102. The outlet 74 is provided in the tip member 28, and communicates with the introduction port 94 (see FIG. 6) via a wire channel 62 provided inside the insertion portion 24.

According to the endoscope 10 having such an engaging guide portion 106, when the wire 60 is introduced from the introduction port 94 and the engaging member 100 is introduced first, the engaging member 100 becomes the wire channel 62 (FIG. 2). It is inserted through the outlet 74) and is derived to the outside from the outlet 74. Then, the engaging member 100 is guided toward the opening 104 of the accommodating groove 102 of the standing table 30 by the engaging guiding portion 106 by the continuous introduction operation of the wire 60, and engages with the accommodating groove 102 from the opening 104. Will be done. As a result, according to the endoscope 10 of the embodiment, the engaging member 100 of the wire 60 can be engaged with the accommodating groove 102 of the upright stand 30 only by the introduction operation of the wire 60.

FIG. 7 is an enlarged perspective view in which the engaging member 100 is engaged with the accommodating groove 102 via the engaging guiding portion 106. FIG. 8 is an explanatory view showing the operation of the engaging member 100 being guided by the engaging guide portion 106 and being engaged with the accommodating groove 102 over time.

As shown in FIGS. 7 and 8, the engaging guide portion 106 guides the engaging member 100 led out from the outlet 74 to the opening 104 of the accommodating groove 102, and the engaging guide path 108 and the inside of the engaging guide path 108. A deformation generating portion 110, which is continuously provided in the opening 104 of the accommodating groove 102, is provided. The deformation generating portion 110 comes into contact with the engaging member 100 that advances in the Y (+) direction toward the opening 104 in the engaging guide path 108, and guides the engaging member 100 in the Y (+) direction while X (X). +) Guide in the direction.

As a result, the tip end side of the wire 60 is elastically deformed in the direction (X (+) direction) gradually away from the opening 104 as the engaging member 100 approaches the opening 104 along the engaging taxiway 108. When the engaging member 100 traveling in the engaging taxiway 108 passes through the deformation generating portion 110, it moves in the X (−) direction by the restoring force of the wire 60 and is engaged with the accommodating groove 102 through the opening 104. NS.

The engaging taxiway 108 is formed by cutting out a part of the peripheral surface 28A of the tip member 28 in a concave shape, and is gradually inclined in the X (+) direction from the outlet 74 in the Y (+) direction. It is a face. A deformation generating portion 110 is formed on the tip end side of the engaging taxiway 108.

Further, the engaging guide portion 106 is formed with a groove 112 that allows the tip end side of the wire 60 to be immersed and released when the engaging member 100 is engaged with the accommodating groove 102. Further, a groove 114 is also formed on the base end side of the accommodating groove 102 of the standing table 30 so that when the engaging member 100 is engaged with the accommodating groove 102, the tip end side of the wire 60 is immersed and released. The width dimension of the groove 112 in the direction orthogonal to the paper surface of FIG. 8 is larger than the diameter of the wire 60, and the engaging member 100 passes through the deformation generating portion 110 so that the engaging member 100 does not immerse in the groove 112. Smaller than the diameter. Further, the width dimension of the groove 114 in the direction orthogonal to the paper surface of FIG. 8 is larger than the diameter of the wire 60, and the engaging member 100 engaged with the accommodating groove 102 is prevented from coming off in the Y (−) direction. , Smaller than the diameter of the engaging member 100.

The engaging guide portion 106 is in a form suitable for engaging the engaging member 100 with the accommodating groove 102 in a state where the standing table 30 is positioned in the standing position. That is, as shown in FIG. 7, the accommodating groove 102 is arranged at a position facing the outlet 74 with the standing table 30 located at the standing position. Therefore, by advancing the engaging member 100 straight from the outlet 74, the engaging member 100 can be engaged with the accommodating groove 102 of the standing table 30 located at the standing position via the engaging guiding portion 106.

Next, a disengagement structure for disengaging the engaging member 100 of the wire 60 engaged with the accommodating groove 102 of the standing table 30 from the accommodating groove 102 will be described.

The tip member 28 is provided with a detachment guide surface 116, and the detachment guide surface 116 is provided on the upper surface of the partition wall 80 (see FIG. 2). The detachment guide surface 116 is a guide surface (see FIGS. 2 and 3) inclined in the Z (−) direction toward the X (+) direction. Further, the detaching guide surface 116 is provided from the inside of the accommodating groove 102 when the wire 60 is further pushed in while the engaging member 100 is engaged with the accommodating groove 102 and the upright stand 30 is located at the inverted position. It functions as a surface for guiding the wire 60 in the direction in which the engaging member 100 is disengaged from the opening 104.

According to the detaching structure configured in this way, the mounting member (described later) provided at the base end of the wire 60 is removed from the engaging hole (described later) of the movable member 96, and then the introduction port of the extension portion 36 is introduced. By pushing the wire 60 from 94, the standing table 30 is positioned from the standing position of FIG. 3 to the lying position of FIG. After that, when the wire 60 is further pushed in, the wire 60 is guided in the X (+) direction in which the engaging member 100 is disengaged from the inside of the accommodating groove 102 to the outside of the opening 104 by the disengagement guide surface 116 of the tip member 28. NS. As a result, the engaging member 100 is easily disengaged from the inside of the accommodating groove 102 to the outside of the opening 104 by the restoring force of the wire 60.

Next, the standing operation mechanism 120 shown in FIGS. 9 and 10 will be described.

FIG. 9 is a configuration diagram showing the overall configuration of the standing operation mechanism 120. Further, FIG. 10 is a side view of the standing operation mechanism 120 of FIG. In FIGS. 9 and 10, the outer case (not shown) of the operation unit 22 is omitted, and the inside of the operation unit 22 is shown.

As shown in FIGS. 9 and 10, the standing operation mechanism 120 is provided inside the operation unit 22.

Further, the standing operation mechanism 120 is a power transmission mechanism that connects the standing operation lever 20 and the movable member 96 and transmits the rotational operation of the standing operation lever 20 to the movable member 96.

The standing operation mechanism 120 rotates the first conversion mechanism 124 that converts the rotational movement of the standing operation lever 20 into a linear motion, the wire 126 that is linearly moved by the first conversion mechanism 124, and the linear motion of the wire 126. The second conversion mechanism 128, which converts the movable member 96 into the above and rotates the movable member 96, is provided. The wire 126 is an example of the driving member of the present invention.

The first conversion mechanism 124 includes a crank member 130 whose base end is connected to the standing operation lever 20, a first slider 132 whose base end is connected to the tip end of the crank member 130, and a base end to the tip end of the first slider 132. A second slider 134, to which is connected, is provided.

The base end of the wire 126 is connected to the tip of the second slider 134, and the tip of the wire 126 is connected to the second conversion mechanism 128 including the speed reduction mechanism.

According to the first conversion mechanism 124 configured as described above, when the standing operation lever 20 is rotated, the crank member 130, the first slider 132, and the second slider 134 are moved along the cylindrical axis B in conjunction with the rotation operation. Make a linear motion. As a result, the wire 126 linearly moves along the cylindrical axis B, and the linear motion is transmitted to the second conversion mechanism 128.

The second conversion mechanism 128 includes a lever 136, a first gear 138, a second gear 140, a third gear 142, and a fourth gear 144. The reduction mechanism is composed of the first gear 138, the second gear 140, the third gear 142, and the fourth gear 144.

The lever 136 is rotatably supported by the bracket 146 via a shaft 148, and the tip of the wire 126 is connected to the lever 136. Therefore, the lever 136 is rotated about the axis 148 by the linear motion of the wire 126.

The first gear 138 is provided integrally with the lever 136 and is rotated about a shaft 148. The second gear 140 is meshed with the first gear 138 and is rotatably supported by the bracket 146 via the shaft 150. The third gear 142 is provided integrally with the second gear 140 and coaxially with the second gear 140. The fourth gear 144 is provided coaxially with the drive shaft 152 of the movable member 96, and is rotatably supported by the bracket 146 via the drive shaft 152 together with the movable member 96. A third gear 142 is meshed with the fourth gear 144.

Therefore, according to the second conversion mechanism 128 configured as described above, when the linear motion of the wire 126 is transmitted to the lever 136, the first gear 138 is rotationally operated together with the lever 136, and the rotational operation of the first gear 138 is performed. Is transmitted to the fourth gear 144 via the second gear 140 and the third gear 142, and the fourth gear 144 is rotated. As a result, the movable member 96 integrated with the fourth gear 144 is rotated around the drive shaft 152.

Therefore, according to the standing operation mechanism 120 configured as described above, the rotation operation of the standing operation lever 20 is transmitted to the movable member 96 via the first conversion mechanism 124, the wire 126, and the second conversion mechanism 128. Can be done. As a result, the movable member 96 is rotated around the drive shaft 152.

Further, according to the standing operation mechanism 120, the rotational operation of the standing operation lever 20 is decelerated and transmitted to the movable member 96 by the second conversion mechanism 128 including the deceleration mechanism. That is, the rotation angle of the legs 162 and 164 of the movable member 96 is smaller than the rotation angle of the lever 136 that is operated by operating the standing operation lever 20. As a result, the force required to operate the standing operation lever 20 can be further reduced, and the standing and lying posture control of the standing table 30 by the standing operation lever 20 becomes easy.

Further, in the embodiment, as shown in FIGS. 9 and 10, the wire 126 is illustrated as an example of the driving member of the standing operation mechanism 120. By using the wire 126 as the driving member, there are the following advantages. That is, when the linear motion of the second slider 134 is converted into the rotary motion of the lever 136, the wire 126 can move in a curved line (slack), so that it is not necessary to install a link mechanism and the space limitation is reduced. Further, when the second slider 134 and the lever 136 are connected by a link mechanism, the force escape area in the standing operation mechanism 120 is reduced, but by using the wire 126, the wire 126 is loosened to release the force. Therefore, the load applied to the standing operation mechanism 120 can be reduced. Therefore, even if some force is applied to the movable member 96 exposed to the outside of the operation unit 22, the force can be released by loosening the wire 126, so that the load applied to the standing operation mechanism 120 is reduced. can do.

Here, the shape of the movable member 96 will be described. As shown in FIGS. 15 and 16 described later, the movable member 96 includes a flat beam portion 160 and legs 162 and 164 provided at both ends of the beam portion 160, and is configured in a U shape as a whole. Has been done. Then, as shown in FIGS. 9 and 10, the drive shaft 152 provided on the leg 162 side is rotatably supported by the outer case (not shown) of the operation unit 22 via the O-ring 166, and is supported on the leg 164 side. The driven shaft 168 provided in the above is rotatably supported by an outer case (not shown) via an O-ring (not shown). The operation unit 22 is kept watertight by these O-rings 166.

Further, the rotation axes of the drive shaft 152 and the driven shaft 168 of the movable member 96 are set in a direction (X (+) −X (−) direction) perpendicular to the axial direction of the wire 60. That is, since the movable member 96 is rotatably provided with the direction perpendicular to the axial direction of the wire 60 as the rotation axis, the wire 60 can be smoothly pushed and pulled.

Next, the connection structure 170 of the first embodiment for connecting the base end of the wire 60 and the movable member 96 will be described with reference to FIGS. 11 to 15.

FIG. 11 is a perspective view of the connecting structure 170 as viewed from the other side surface 22B of the operating unit 22. Further, FIG. 12 is a perspective view of the connecting structure 170 shown in FIG. 11 as viewed from the left side.

13 is a perspective view of the wire 60 and the wire assembly 172 provided with the mounting member 98 provided at the base end of the wire 60, FIG. 14 is a front view of the mounting member 98, and FIG. 15 is a front view of the mounting member 98. , Is a perspective view of an extension portion 36 showing an introduction port 94 and a movable member 96.

11 to 15 above are explanatory views for explaining the connecting structure 170, and in FIGS. 11 and 12, the base end of the wire 60 and the movable member 96 are connected by the connecting structure 170. The figure is shown, and FIGS. 13 to 15 show a mounting member 98 and a movable member 96 constituting the connecting structure 170. As shown in FIG. 13, the wire 60 includes an engaging member 100 provided on the distal end side, a conductive wire 60A having a distal end fixed to the engaging member 100, and a base provided on the proximal end side. It includes an end locking portion 60E and an insulating wire 60C whose proximal end is fixed to the proximal locking portion 60E. The wire 60 includes a connecting member 60B that connects the base end portion of the conductive wire 60A and the tip end portion of the insulating wire 60C.

As shown in FIG. 13, the connecting member 60B has a substantially tubular shape. The connecting member 60B defines an opening for inserting the conductive wire 60A and a space for accommodating the conductive wire 60A. Similarly, the connecting member 60B defines an opening for inserting the insulating wire 60C and a space for accommodating the insulating wire 60C. In the embodiment, a partition wall 60G that separates the space of the conductive wire 60A and the space of the insulating wire 60C is provided inside the connecting member 60B. The partition wall 60G functions as a positioning member when the conductive wire 60A and the insulating wire 60C are inserted into the connecting member 60B.

The connecting member 60B is made of a metal member such as stainless steel. The conductive wire 60A and the connecting member 60B can be fixed, for example, by forming a brazing joint. Further, the conductive wire 60A and the connecting member 60B can be fixed by pressurizing and deforming the connecting member 60B to form a caulked portion. Fixing of the conductive wire 60A and the connecting member 60B by brazing or caulking is shown, but the present invention is not particularly limited thereto.

The insulating wire 60C and the connecting member 60B can be fixed, for example, by deforming the connecting member 60B under pressure to form a caulked portion.

At the base end of the insulating wire 60C, the insulating wire 60C and the metal base end clasp 60F can be fixed by pressure-deforming the base end clasp 60F to form a caulked portion. ..

The base end locking portion 60E is made of a metal member such as brass and has a substantially tubular shape. At least, an opening for inserting the insulating wire 60C and a space for accommodating the insulating wire 60C are defined in the base end locking portion 60E. A reduced diameter portion 60H is formed inside the base end locking portion 60E. The reduced diameter portion 60H functions as a positioning member when the insulating wire 60C is inserted into the base end locking portion 60E.

The base end locking portion 60E and the base end clasp 60F can be fixed by forming a brazed joint portion by, for example, brazing or soldering. Further, the base end locking portion 60E and the base end clasp 60F can be fixed by pressurizing and deforming the base end locking portion 60E to form a caulking portion. The base end locking portion 60E and the insulating wire 60C are fixed via the base end clasp 60F. However, if the base end locking portion 60E and the insulating wire 60C can be fixed, the base end clasp 60F may not be used. The wire 60 is fixed to the mounting member 98 by the base end locking portion 60E (see FIG. 19).

Caulking is a method of tightening with a tool or the like to deform and fix a member. Further, brazing means fixing by brazing or soldering.

The insulating wire 60C is exposed except for the portion fixed by the connecting member 60B and the base end locking portion 60E. As shown in FIG. 13, the exposed outer periphery of the insulating wire 60C is covered with the insulating tube-shaped member 60D juxtaposed with the insulating wire 60C. The tube-shaped member 60D does not have to cover the entire exposed portion of the insulating wire 60C. Juxtaposition simply means that they are arranged side by side. The operation of the wire 60 will be described later.

As shown in FIG. 15, the movable member 96 is provided with an engaging hole 174 into which the mounting member 98 is detachably engaged with one touch. The engaging hole 174 is formed along the longitudinal direction of the beam portion 160 of the movable member 96, and is formed by a through hole penetrating the front and back surfaces of the beam portion 160. A pair of engaging portions 176 and 176 (see FIG. 14) of the mounting member 98 are detachably engaged with the engaging holes 174 with one touch. That is, the mounting member 98 is detachably engaged with the movable member 96 with one touch. As a result, according to the connecting structure 170 of the first embodiment, the base end of the wire 60 and the movable member 96 are connected outside the operation unit 22. The engaging hole 174 may be a concave non-penetrating hole that does not penetrate the front and back surfaces of the beam portion 160.

In addition, in this specification, "one-touch detachable engagement" means to attach the attachment member 98 to the movable member 96 without using other fixtures (for example, screws, bolts, nuts, etc.). This means that the operation and the operation for separating the mounting member 98 from the movable member 96 can be performed only by the relative movement of the mounting member 98 with respect to the movable member 96, respectively. The same applies to other embodiments described later.

The mounting member 98 shown in FIG. 14 is a substantially triangular plate-like body, and a hole 180 to which the base end of the wire 60 is connected is formed in the core portion 178 of the central portion. The engaging portions 176 and 176 of the mounting member 98 are provided on both sides of the core portion 178 via slit-shaped notches 182, and a pair of elastically deformed portions 184 that elastically deform and engage with the engaging holes 174. It is provided. The elastically deformed portion 184 is formed with a pair of claw portions 186 that are locked to the edge portions 175 and 175 (see FIGS. 15 and 16) on both sides of the engaging hole 174 in the longitudinal direction. When the engaging hole 174 and the engaging portion 176 are engaged with or disengaged, the pair of claw portions 186 are displaced in a direction close to each other due to the elastic deformation of the pair of elastic deformation portions 184.

Next, the procedure for connecting the base end of the wire 60 and the movable member 96 according to the connecting structure 170 of the first embodiment will be described with reference to FIGS. 16 to 18.

Before connecting the base end of the wire 60 and the movable member 96, first, the tip of the wire 60 is connected to the upright stand 30.

FIG. 16 shows a diagram in which the wire 60 is inserted from the introduction port 94 with the engaging member 100 (see FIG. 13) at the head, and the tip of the wire 60 is raised by the insertion operation of the wire 60. Connect to the stand 30.

That is, when the wire 60 is introduced from the introduction port 94 and the engaging member 100 is introduced first in the state where the standing table 30 is positioned in the standing position (see FIG. 3), as shown in FIG. 16, the engaging member 100 is introduced. Is led out from the outlet 74 via the wire channel 62 (see FIG. 2). Then, the engaging member 100 is guided toward the opening 104 of the accommodating groove 102 of the standing table 30 by the engaging guiding portion 106 of FIG. 3 by the continuous introduction operation of the wire 60, and the engaging member 100 is guided from the opening 104 toward the accommodating groove 102. Engage in. As a result, the tip of the wire 60 is connected to the upright stand 30.

FIG. 17 shows the state of the mounting member 98 in a state where the tip of the wire 60 is connected to the upright stand 30. In this state, the tapered portion 187 at the lower part of the claw portion 186 is brought into contact with the edges on both sides of the engaging hole 174 and pushed. By this operation, the space between the claws 186 and 186 is narrowed, the claws 186 and 186 are locked to the edges 175 and 175 on both sides of the engaging hole 174, and the movable member 96 is as shown in the connection diagram shown in FIG. The mounting member 98 is connected to.

As a result, according to the connection structure 170 of the first embodiment, the operation for attaching the attachment member 98 to the movable member 96 can be performed only by the relative operation of the attachment member 98 with respect to the movable member 96. That is, according to the connecting structure 170 of the first embodiment, the mounting member 98 can be engaged with the movable member 96 with one touch.

When mounting the mounting member 98 on the movable member 96, the pair of engaging portions 176 and 176 of the mounting member 98 are pinched by fingers, and the space between the claw portions 186 and 186 is determined from the dimensions of the engaging hole 174 in the longitudinal direction. It can also be narrowed to be smaller. That is, the pair of elastically deformed portions 184 are displaced in a direction closer to each other by elastic deformation. Then, after inserting the claws 186 and 186 into the engaging holes 174, the force of the fingers is relaxed to widen the space between the claws 186 and 186 so that the claws 186 and 186 are inserted into the engaging holes 174 on both sides. Lock to 175 and 175. As a result, the mounting member 98 engages with the movable member 96 with one touch.

Further, in the embodiment, the engaging hole 174 is formed in the movable member 96 and the engaging portion 176 is formed in the mounting member 98, but the engaging portion 176 is formed in the movable member 96 and the engaging hole is formed in the mounting member 98. 174 may be formed. That is, if one of the movable member 96 and the mounting member 98 is provided with an engaging hole 174, and the other is provided with an engaging portion 176 that can be detachably engaged with the engaging hole 174 with one touch. good. Further, the claw portion 186 may be provided not on the longitudinal direction side of the beam portion 160 of the movable member 96 but on the lateral side in the lateral direction. Furthermore, the engaging holes 174 may be two engaging holes formed so as to be separated from each other in the longitudinal direction of the beam portion 160.

By the way, the endoscope 10 is used for various examinations or treatments. After that, when cleaning the endoscope 10, the following work is performed.

First, the cap 76 shown in FIG. 2 is removed from the tip member 28. Next, the engaging portions 176 and 176 of the mounting member 98 are removed from the engaging hole 174 (see FIG. 15) of the movable member 96, and the wire 60 is removed from the movable member 96. Next, the wire 60 is pushed in from the introduction port 94 of the extension portion 36 to position the standing table 30 from the standing position of FIG. 3 to the inverted position of FIG. After that, when the wire 60 is further pushed in, the engaging member 100 is disengaged from the inside of the accommodating groove 102 to the outside of the opening 104. By this operation, the tip of the wire 60 is removed from the upright stand 30. Next, the wire 60 is pulled out from the introduction port 94 to empty the wire channel 62. After that, the tip member 28, the upright stand 30, and the wire channel 62 of the wire 60 are cleaned.

In the work of removing the tip of the wire 60 from the upright stand 30, since the mounting member 98 is connected to the movable member 96 outside the operation unit 22, the connecting structure 170 of the first embodiment is connected to the movable member 96 to the mounting member 98. Can be easily removed. Specifically, the pair of engaging portions 176 and 176 of the mounting member 98 are pinched by fingers to narrow the space between the claw portions 186 and 186 so as to be smaller than the longitudinal dimension of the engaging hole 174. After that, the claws 186 and 186 are pulled out from the engaging hole 174.

As a result, according to the connection structure 170 of the first embodiment, the operation for separating the mounting member 98 from the movable member 96 can be performed only by the relative movement of the mounting member 98 with respect to the movable member 96. That is, according to the connecting structure 170 of the first embodiment, the mounting member 98 is detached from the movable member 96 with one touch.

As described above, according to the connecting structure 170, after the tip of the wire 60 is connected to the upright stand 30, the mounting member 98 is engaged with the engaging hole 174 of the movable member 96 outside the operation unit 22. The base end of the wire 60 and the movable member 96 can be connected only by engaging the portions 176 and 176. Further, when the base end of the wire 60 is removed from the movable member 96 at the time of cleaning the endoscope 10, the mounting member 98 is simply removed from the engaging hole 174 of the movable member 96 outside the operation unit 22. The base end of the wire 60 can be removed from the movable member 96.

Therefore, according to the connecting structure 170, the endoscope of Patent Document 1 in which the operation of attaching / detaching the base end of the wire to the connecting tool is performed inside the operation unit, and the patent in which the tip of the cable cord is detachably attached to the collet and the nut. Compared with the endoscope of Document 2, the base end of the wire 60 can be easily attached to and detached from the movable member 96.

In the above-described embodiment, the wire 60 is pulled out from the introduction port 94, but the wire 60 may be pulled out from the outlet port 74 of the tip member 28. In this case, if the mounting member is removed from the base end of the wire 60 prior to pulling out the wire 60, the wire 60 can be pulled out from the outlet 74.

Next, the operations of the standing operation lever 20, the movable member 96, the mounting member 98, the wire 60, and the standing stand will be described.

When the standing operation lever 20 of FIG. 1 is operated, the movable member 96 operates in the direction of arrow C or arrow D as shown in the operation explanatory view of the movable member 96 shown in FIG. Then, in conjunction with the operation of the movable member 96, the wire 60 is pushed and pulled by the movable member 96 via the mounting member 98. As a result, the standing table 30 (not shown) is rotated between the standing position and the lying position.

When the movable member 96 moves in the direction of arrow C, the mounting member 98 mounted on the movable member 96 also moves in the direction of arrow C. Along with this operation, the wire 60 is pushed toward the tip side, and the upright stand 30 rotates to the lodging position. This is called a pushing operation.

When the movable member 96 moves in the direction of arrow D, the mounting member 98 mounted on the movable member 96 also moves in the direction of arrow D. Along with this operation, the wire 60 is pulled toward the base end side, and the standing table 30 rotates to the standing position. This is called a pulling operation.

First, the tension operation will be described. Since the wire 60 is configured as shown in FIG. 13, in the pulling operation, tension in the proximal direction is applied to the insulating wire 60C via the proximal end locking portion 60E. Next, the tension from the insulating wire 60C is applied in the order of the connecting member 60B, the conductive wire 60A, and the upright stand 30. The standing table 30 rotates to the standing position.

A strong force is required to raise the standing table 30 in order to raise the large-diameter treatment tool. Therefore, a relatively large tension is applied to the insulating wire 60C. If the insulating wire 60C is stretched due to tension, there is a concern that the standing angle of the standing table 30 may be lowered. Therefore, it is preferable that the stretching of the insulating wire 60C is small with respect to the tension in the pulling operation. Further, in the tensile operation, it is preferable that the insulating wire 60C has a high tensile strength in order to prevent the insulating wire 60C from breaking when a tension of an unexpected magnitude is applied.

For example, the insulating wire 60C preferably has a breaking strength of 100 N or more, and preferably has an elongation rate of 5% or less when pulled at 50 N. Breaking strength can be measured by a tensile test. Both ends of the insulating wire 60C are fixed with clasps, and the clasps at both ends are pulled to obtain the breaking strength at the time of breaking. The elongation rate can be obtained by pulling the clasps at both ends at 50 N and calculating 100 × (extended length) / (original length). The extended length can be calculated by (length after being pulled)-(original length).

The insulating wire 60C is a linear member and may be a single wire or a stranded wire. As the insulating wire 60C, for example, a liquid crystal polyester fiber (manufactured by KB Seiren Co., Ltd., "Zexion" (registered trademark)) or the like can be used.

As shown in FIG. 13, the tube-shaped member 60D is juxtaposed with the insulating wire 60C, but is not fixed to the connecting member 60B and the base end locking portion 60E. The structure is such that tension is not applied to the tube-shaped member 60D in the tension operation. It is possible to prevent the tube-shaped member 60D from being stretched or broken due to the pulling operation.

When the tube-shaped member 60D is not fixed to the connecting member 60B and the base end locking portion 60E, it has the following advantages.

If the connecting member 60B from the top of the tube-shaped member 60D for covering the insulation of the wire 60C, and the case of fixing by the proximal locking portion 60E, the tensioning strength member is a wire 60 C and the connecting member when tension There is a concern of slippage when the tube-shaped member 60D is inserted between the 60B and the 60B. On the other hand, in the structure of the embodiment shown in FIG. 13, no intervening tubular shaped member 60D between the coupling member 60B and the wire 60 C, since the directly fixed, it is possible to avoid the fear of slip.

Next, the pushing operation will be described. Since the wire 60 is configured as shown in FIG. 13, a pressure in the tip direction is applied to the insulating wire 60C via the base end locking portion 60E in the pushing operation. However, since the insulating wire 60C is easily bent, it is difficult to transfer the pressure to the connecting member 60B.

On the other hand, the tube-shaped member 60D has a characteristic that it is less likely to bend as compared with the insulating wire 60C. Therefore, pressure is applied to the tube-shaped member 60D via the proximal locking portion 60E. Next, pressure is applied from the tube-shaped member 60D in the order of the connecting member 60B, the conductive wire 60A, and the upright stand 30. The standing table 30 rotates to the lodging position.

If the tube-shaped member 60D is bent, there is a concern that it will be difficult to apply the pressure required for the rotation of the standing table 30. The tube-shaped member 60D needs to have an appropriate hardness. For example, it is preferable that the pipe-shaped member 60D has a high buckling strength even when the pressure applied to the pipe-shaped member 60D is reached until the standing base 30 reaches the maximum lodging position by the pushing operation of the standing operation lever 20. It is possible to prevent the tube-shaped member 60D from buckling.

The buckling strength is determined by covering the exposed portion of the insulating wire 60C with the tube-shaped member 60D, executing the pushing operation, and when the standing table 30 does not reach the maximum buckling position, "no buckling strength". When the standing table 30 reaches the maximum lodging position, it is determined that there is buckling strength.

As a material constituting the tube-shaped member 60D, an insulating resin such as polyvinyl chloride (PVC), polyethylene (PE: polyethylene), or polytetrafluoroethylene (PTFE) can be applied.

As described above, in the wire 60, the insulating wire 60C is mainly used in the pulling operation, and the tube-shaped member 60D is mainly used in the pushing operation. A material suitable for the pulling operation and the pushing operation can be selected.

Further, the tube-shaped member 60D covers the insulating wire 60C, and the insulating wire 60C can be prevented from being worn or unraveled by the internal parts of the endoscope 10.

When PTFE is used for the pipe-shaped member 60D, the pipe-shaped member 60D can be provided with a lubrication function. The tube-shaped member 60D can promote the smooth movement of the wire 60 and eliminate the need for a lubricant.

FIG. 19 is a cross-sectional view showing a state in which the valve body 95 is attached to the introduction port 94. In the embodiment, since the base end of the wire 60 is arranged outside the introduction port 94, it is preferable to attach the valve body 95 to the introduction port 94. As a result, it is possible to prevent the liquid in the body cavity that has flowed back from the outlet 74 of the tip member 28 via the wire channel 62 from leaking from the introduction port 94.

As shown in FIG. 19, the wire exposed region L of the wire 60 is exposed to the outside from the introduction port 94. Here, the wire exposed region L means an region of the wire 60 that is exposed to the outside from the introduction port 94 in a state where the movable member 96 is located farthest from the introduction port 94.

The wire 60 is composed of an insulating wire 60C and an insulating tube-shaped member 60D in the wire exposed region L. Therefore, when the high frequency treatment tool is used, it is possible to prevent the current from leaking to the outside from the wire exposed region L.

In order to surely prevent the current from leaking to the outside, the length of the insulating wire 60C and the tube-shaped member 60D is preferably long (see FIG. 13). As shown in FIG. 1, the wire 60 is engaged with the upright base 30 (not shown) of the tip portion 26 from the introduction port 94 via the flexible portion 54 and the curved portion 52. At that time, it is preferable that the connecting member 60B is not positioned at the curved portion 52, and it is preferable that the connecting member 60B is arranged inside the flexible portion 54. The angles of the bending portion 52 in order to stabilize. When the connecting member 60B is arranged inside the soft portion 54, it is preferably on the tip end side of the soft portion 54. The length of the insulating wire 60C and the tube-shaped member 60D can be increased. Specifically, by ensuring that the length from the engaging member 100 to the base end of the connecting member 60B is 80 mm or more, the connecting member 60B can be arranged in the flexible portion 54.

As the insulating wire 60C of the wire 60, it is desirable to use an insulating material having low elongation and elastic force at the tip portion. However, there are few insulating materials that satisfy such conditions. Therefore, the conductive wire 60A is used on the tip end side of the wire 60, and the insulating wire 60C and the conductive wire 60A are connected by the connecting member 60B to ensure the insulating property of the wire 60. By using the elastic conductive wire 60A, as shown in FIGS. 7 and 8, the engaging member 100 can be easily engaged with the accommodating groove 102 by elastically deforming and restoring the wire 60. can.

As shown in FIG. 19, in the embodiment, the operation unit 22 has an opening forming member 97 that forms an introduction port 94. In the embodiment, the wire channel 62 is formed by the opening forming member 97 and the tube 61, and the wire 60 is inserted into the wire channel 62 and the opening forming member 97. The movable member 96 rotates by operating the standing operation lever 20 (not shown). The wire 60 is pushed and pulled through the mounting member 98 attached to the movable member 96. By this operation, the wire 60 moves in the wire channel 62. The clearance between the tube-shaped member 60D of the wire 60 and the wire channel 62 is preferably, for example, about 0.1 mm. Click clearance is narrow and becomes resistance is large at the time of inserting the wire 60, also because lead clearance is wider in the play of the wire 60.

As shown in FIG. 19, the entire opening forming member 97 can be made of an insulator. Examples of the material constituting the insulator include resin materials such as m-PPE (modified Poly Phenylene Ether) and PC (polycarbonate).

As shown in FIG. 21, the wire 60 is fixed to the mounting member 98 by the base end locking portion 60E. For example, the mounting member 98 can be made of an insulator.

Examples of the material of the insulator constituting the mounting member 98 include a resin material such as POM (polyoxymethylene).

20 to 22 are views showing the form of the second aspect of the wire 60, and are enlarged views of the base end locking portion 60E and the base end side of the insulating wire 60C. As shown in FIGS. 20 to 22, the insulating wire 60C is fixed to the proximal clasp 60F on the proximal end side of the insulating wire 60C. The insulating rod-shaped member 60J is juxtaposed with the insulating wire 60C. The outer circumference of the rod-shaped member 60J is covered with an insulating wire 60C. The rod-shaped member 60J is formed with a through hole 60K orthogonal to the longitudinal axis direction of the rod-shaped member 60J on the proximal end side. The base end clasp 60F is formed with a through hole 60L orthogonal to the longitudinal axis direction of the rod-shaped member 60J on the tip end side.

With the through hole 60K and the through hole 60L aligned, the retaining pin 60M is inserted so as to penetrate the through hole 60K and the through hole 60L. The insulating wire 60C and the rod-shaped member 60J are fixed to the base end locking portion 60E.

On the tip side of the insulating wire 60C, although not shown, the insulating wire 60C and the rod-shaped member 60J are fixed to the connecting member 60B in the same manner as in FIGS. 20 to 22.

The operation of the wire 60 of FIGS. 20 to 22 will be described. In the pulling operation, since there is a gap between the through hole 60L of the base end clasp 60F and the retaining pin 60M, the tension is applied to the insulating wire 60C and not to the rod-shaped member 60J. The tension applied to the insulating wire 60C is finally applied to the upright stand 30, and the upright stand 30 rotates to the upright position.

In the pushing operation, when the through hole 60L of the base end clasp 60F and the retaining pin 60M come into contact with each other, pressure is applied to the rod-shaped member 60J. The pressure applied to the rod-shaped member 60J is finally applied to the standing table 30, and the standing table 30 rotates to the lodging position.

23 to 24 are views showing the form of the third aspect of the wire 60, and are enlarged views of the base end locking portion 60E and the base end side of the insulating wire 60C. As shown in FIGS. 23 to 24, the insulating wire 60C is fixed to the proximal clasp 60F on the proximal end side of the insulating wire 60C. The insulating rod-shaped member 60J is juxtaposed with the insulating wire 60C. The rod-shaped member 60J is fixed to the base end clasp 60F on the base end side thereof. The insulating wire 60C and the rod-shaped member 60J are arranged in a separated state.

On the tip side of the insulating wire 60C, although not shown, the insulating wire 60C and the rod-shaped member 60J are fixed to the connecting member 60B in the same manner as in FIGS. 23 to 24.

The operation of the wire 60 of FIGS. 23 to 24 will be described. In the pulling operation, since the insulating wire 60C and the rod-shaped member 60J are fixed to the base end clasp 60F, tension is applied to the insulating wire 60C and the rod-shaped member 60J. It begins to stretch at the same time as the rod-shaped member 60J and the insulating wire 60C. The insulating wire 60C is configured to reach maximum elongation before the rod-shaped member 60J begins elastic deformation. When the tension increases, the tension is applied to the insulating wire 60C and is not applied to the rod-shaped member 60J. The insulating wire 60C can prevent the rod-shaped member 60J from being deformed. The tension applied to the insulating wire 60C is finally applied to the upright stand 30, and the upright stand 30 rotates to the upright position.

In the pushing operation, pressure is applied to the rod-shaped member 60J via the base end clasp 60F. The pressure applied to the rod-shaped member 60J is finally applied to the standing table 30, and the standing table 30 rotates to the lodging position.

In the wire 60 shown in FIGS. 20 to 24, the insulating wire 60C is mainly used in the pulling operation, and the rod-shaped member 60J is mainly used in the pushing operation. A material suitable for the pulling operation and the pushing operation can be selected. The rod-shaped member 60J has higher resistance to kink than the tube-shaped member 60D. Kink means that when pressure is applied, it is difficult to bend and return to its original state. The rod-shaped member 60J is preferably made of a resin material such as PTFE.

FIG. 25 is a perspective view showing a modified example of the connecting structure 170 shown in FIGS. 11 to 18.

In explaining the connection structure 170A of the modified example shown in FIG. 25, the same or similar members as the connection structure 170 shown in FIGS. 11 to 18 will be described with the same reference numerals.

The engaging hole 174A formed in the movable member 96 is a circular through hole. Further, the engaging portion 176A of the mounting member 98A has a cylindrical portion 177 that is fitted and inserted into the engaging hole 174A. Further, the elastically deformed portion of the mounting member 98A is composed of a grinding portion 184A provided at the tip end portion of the tubular portion 177, and a claw portion 186A is formed on the outer peripheral surface of the grinding portion 184A.

According to the connecting structure 170A configured as described above, when the slit portion 184A of the tubular portion 177 is fitted and inserted into the engagement hole 174A, the diameter of the slit portion 184A is reduced by elastic deformation. As a result, the ground portion 184A passes through the engaging hole 174A, and then when the ground portion 184A passes through the engaging hole 174A, the ground portion 184A returns to the original diameter. As a result, as shown in the cross-sectional view of the connecting structure 170A shown in FIG. 26, the claw portion 186A of the ground portion 184A engages with the back surface 160A of the beam portion 160 of the movable member 96, so that the mounting member 98A is attached to the movable member 96. Engage with one touch.

In this connecting structure 170A as well, as in the connecting structure 170, the attachment / detachment work of the attachment member 98A to the movable member 96 is performed outside the operation unit 22. The mounting work only needs to insert the engaging portion 176A into the engaging hole 174A. By this mounting work, the base end of the wire 60 can be easily connected to the movable member 96 via the mounting member 98A.

When removing the mounting member 98A from the movable member 96, the slit portion 184A is pinched with a finger to reduce the diameter of the slit portion 184A. After that, the ground portion 184A is pulled out from the engaging hole 174A.

As a result, in the connection structure 170A of the modified example, as in the connection structure 170, the operation for attaching the mounting member 98A to the movable member 96 and the operation for separating the mounting member 98A from the movable member 96 are performed, respectively. It can be performed only by the relative operation of the mounting member 98A with respect to the movable member 96. That is, according to the connecting structure 170A, the mounting member 98A is detachably engaged with the movable member 96 with one touch.

Next, another connection structure will be described. However, in the following description, the insulating coat and the first insulator constituting the heat shrinkable tube will be omitted. Another connection structure 210 will be described with reference to FIGS. 27-29.

27 is a perspective view of the connecting structure 210, FIG. 28 is an assembled perspective view of the connecting structure 210, and FIG. 29 is a cross-sectional view of a main part of the connecting structure 210. In explaining the connection structure 210, members that are the same as or similar to the connection structure 170 shown in FIGS. 11 to 18 will be described with the same reference numerals.

The connecting structure 210 is composed of a movable member 96 and a mounting member 212.

As shown in FIG. 28, the beam portion 160 of the movable member 96 is provided with an engaging portion 214, and the mounting member 212 is provided with an engaging portion 216 that is detachably engaged with the engaging hole 214 with one touch. Further, the mounting member 212 is composed of a knob portion 218 and a shaft portion 220 constituting the engaging portion 216, and the base end of the wire 60 is connected to the hole portion 222 formed in the shaft portion 220.

Here, the shape of the engaging hole 214 will be described. FIG. 30 is a plan view of the engaging hole 214, showing the shape of the engaging portion 216 superimposed on the shape of the engaging hole 214.

The engaging hole 214 has a narrow portion 224 having a diameter a and a wide portion 226 having a diameter b larger than the diameter a. In the embodiment, the first width of the present invention is described by the diameter a, and the second width of the present invention is shown by the diameter b. As shown in FIG. 30, the line CL connecting the center of the narrow portion 224 and the center of the wide portion 226 is a curved line. The line CL constitutes a substantially arc centered on the introduction port 94 (not shown). The arrangement of the narrow portion 224 and the wide portion 226 facilitates the operation when the mounting member 212 is engaged with the engagement hole 214. This will be described later.

Further, the engaging portion 216 of the mounting member 212 shown in FIG. 28 has a shaft portion 220 having an outer diameter c equal to or less than the diameter a in FIG. 30 and an enlarged diameter portion 228 provided at the tip of the shaft portion 220. .. The enlarged diameter portion 228 has an outer diameter d larger than the diameter a and smaller than the diameter b. The enlarged diameter portion 228 functions as a retaining member for restricting the shaft portion 220 from separating from the narrow portion 224 in the axial direction of the shaft portion 220. In order to stably hold the shaft portion 220, it is preferable that the difference between the diameter a and the outer diameter c is small.

The engagement operation will be described. Since the wide portion 226 of the engaging hole 214 is larger than the enlarged diameter portion 228, the engaging portion 216 of the mounting member 212 can be easily inserted into the engaging hole 214. The mounting member 212 is then slid from the wide portion 226 to the narrow portion 224. At that time, as shown in FIG. 27, since the mounting member 212 is fixed to the wire 60, the mounting member 212 moves on the locus of a substantially arc centered on the introduction port 94. Since the narrow portion 224 and the wide portion 226 are arranged in a substantially arc as described above, the mounting member 212 can smoothly slide between the narrow portion 224 and the wide portion 226. Further, when the mounting member 212 is located in the narrow portion 224, tension can be applied to the wire 60.

Further, the engaging hole 214 has a frictional resistance portion 230 between the narrow portion 224 and the wide portion 226. The frictional resistance portion 230 is provided at the opening entrance portion of the narrow portion 224. The frictional resistance portion 230 can regulate that the shaft portion 220 inserted into the narrow portion 224 carelessly slides from the narrow portion 224 to the wide portion 226. The frictional resistance portion 230 is formed so as to protrude from the wall surfaces of the engaging holes 214 facing each other.

Similar to the connecting structure 170, the connecting structure 210 configured in this way also attaches / detaches the mounting member 212 to the movable member 96 outside the operation unit 22. In the mounting work, the engaging portion 216 is inserted into the wide portion 226 of the engaging hole 214, the engaging portion 216 is slid toward the narrow portion 224, and the engaging portion 216 is engaged with the narrow portion 224. All you have to do is let it. As a result, the mounting member 212 engages with the movable member 96 with one touch. By this mounting work, the base end of the wire 60 can be easily connected to the movable member 96 via the mounting member 212.

Further, when the engaging portion 216 is slid from the wide portion 226 toward the narrow portion 224, the shaft portion 220 comes into contact with the frictional resistance portion 230, but the engaging portion 216 is widened by the force of sliding the engaging portion 216. It can be engaged with the narrow portion 224 without any problem.

Further, in a state where the engaging portion 216 is engaged with the narrow portion 224, the diameter-expanding portion 228 prevents the shaft portion 220 from being disengaged from the narrow portion 224 in the axial direction of the shaft portion 220. Further, it is regulated that the engaging portion 216 slides from the narrow portion 224 to the wide portion 226 when the shaft portion 220 comes into contact with the frictional resistance portion 230. As a result, the mounting member 212 can be securely connected to the movable member 96.

On the other hand, when the mounting member 212 is removed from the movable member 96 when cleaning the endoscope 10, the engaging portion 216 of the mounting member 212 is slid from the narrow portion 224 to the wide portion 226 and engaged from the wide portion 226. Pull out the joint part 216. As a result, the mounting member 212 is detached from the movable member 96 with one touch.

Therefore, according to another connecting structure 210, the base end of the wire 60 can be easily attached to and detached from the movable member 96 as compared with the endoscopes of Patent Documents 1 and 2 described above.

Although the engaging hole 214 having the frictional resistance portion 230 is illustrated in FIG. 30, the engaging hole 214 may not have the frictional resistance portion 230.

Next, another connection structure 232 will be described with reference to FIGS. 31 and 32.

FIG. 31 is an assembly perspective view of the connecting structure 232. FIG. 32 is a plan view of the engaging hole 214 formed in the movable member 96, and shows the shape of the engaging hole 214 superimposed on the shape of the engaging portion 236 of the mounting member 234. In explaining the connection structure 232, members that are the same as or similar to the connection structure 210 shown in FIGS. 27 to 30 will be described with the same reference numerals.

As shown in FIG. 32, the engagement hole 214 has a narrow portion 224 having a diameter a and a wide portion 226 having a diameter b larger than the diameter a. The narrow portion 224 and the wide portion 226 are in a positional relationship as in FIG. 30.

Further, the engaging portion 236 of the mounting member 234 shown in FIG. 31 is provided at a shaft portion 220 having an outer diameter c having a diameter a or less and at the tip of the shaft portion 220, and has an outer diameter f larger than the diameter b. It has an enlarged diameter portion 238 in which a plurality of (for example, four) split grooves 237 (see FIG. 31) are formed. When the diameter-expanded portion 238 is fitted into the wide portion 226, the diameter-expanded portion 238 is elastically deformed by the plurality of split grooves 237 to reduce the diameter. In order to stably hold the shaft portion 220, it is preferable that the difference between the diameter a and the outer diameter c is small.

Similar to the connecting structure 210, the connecting structure 232 configured in this way also attaches / detaches the mounting member 234 to the movable member 96 outside the operation unit 22. In the mounting work, first, the diameter-expanded portion 238 is fitted into the wide portion 226 of the engaging hole 214. At that time, the diameter-expanded portion 238 is elastically deformed by the plurality of split grooves 237 to reduce the diameter. As a result, the enlarged diameter portion 238 passes through the wide portion 226, and then when the enlarged diameter portion 238 passes through the wide portion 226, the enlarged diameter portion 238 returns to the original diameter. As a result, the enlarged diameter portion 238 engages with the back surface 160A of the beam portion 160 of the movable member 96, so that the mounting member 234 is prevented from coming off from the movable member 96.

After that, the engaging portion 236 is slid toward the narrow portion 224 to engage the engaging portion 236 with the narrow portion 224. As a result, the mounting member 234 is engaged with the movable member 96 with one touch. By this mounting work, the base end of the wire 60 can be easily connected to the movable member 96 via the mounting member 234.

Further, in a state where the engaging portion 236 is engaged with the narrow portion 224, the diameter-expanding portion 238 prevents the shaft portion 220 from being disengaged from the narrow portion 224 in the axial direction of the shaft portion 220. Further, it is regulated that the engaging portion 236 slides from the narrow portion 224 to the wide portion 226 when the shaft portion 220 comes into contact with the friction resistance portion 230. As a result, the mounting member 234 can be securely connected to the movable member 96.

On the other hand, when removing the mounting member 234 from the movable member 96 when cleaning the endoscope 10, the engaging portion 236 of the mounting member 234 is slid from the narrow portion 224 to the wide portion 226, and then the diameter-expanded portion 238 is used. With fingers, the diameter-expanded portion 238 is reduced in diameter, and the diameter-expanded portion 238 is pulled out from the wide portion 226. As a result, the mounting member 234 is detached from the movable member 96 with one touch.

Therefore, according to another connection structure 232, the base end of the wire 60 can be easily attached to and detached from the movable member 96 as compared with the endoscopes of Patent Documents 1 and 2 described above.

Although FIG. 32 illustrates the engaging hole 214 having the frictional resistance portion 230, the engaging hole 214 may not have the frictional resistance portion 230.

Next, another connection structure 240 will be described with reference to FIGS. 33 and 34.

Figure 33 is a perspective view of the connecting structure 240, FIG. 34 is an assembled perspective view of the connection structure 2 4 0. In explaining the connection structure 240, members that are the same as or similar to the connection structure 170 shown in FIGS. 11 to 18 will be described with the same reference numerals.

The connecting structure 240 is composed of a movable member 242 which is a movable member and a mounting member 244.

The movable member 242 is composed of a leg portion 162, a leg portion 164, and a cylindrical body 246 that connects the leg portion 162 and the leg portion 164. The cylindrical body 246 extends in a direction (X (+) −X (−) direction) perpendicular to the axial direction of the wire 60. Further, in FIGS. 33 and 34, U-shaped grooves 248 and 250 forming a rotation restricting stopper are formed at the upper ends of the leg portion 162 and the leg portion 164.

On the other hand, the base end of the wire 60 is connected to the mounting member 244. The mounting member 244 is composed of an annular body 252 that rotatably engages with the outer circumference of the cylindrical body 246, and pins 254 and 256 that form a rotation control stopper together with the grooves 248 and 250. The annular body 252 has a C-shaped cross section orthogonal to the longitudinal direction, and by pressing the slit 253 formed in the longitudinal direction against the cylindrical body 246, the diameter is expanded and the ring body 246 is engaged with the cylindrical body 246 with one touch. It fits.

Similar to the connecting structures 170 and 210, the connecting structure 240 configured in this way also attaches / detaches the mounting member 244 to the movable member 242 outside the operation unit 22. In the mounting operation, the slit 253 of the annular body 252 of the mounting member 244 is pressed against the cylindrical body 246 of the movable member 242. By this work, the mounting member 244 engages with the movable member 242 with one touch. As a result, the base end of the wire 60 can be reliably connected to the movable member 242 via the mounting member 244.

Further, when the annular body 252 engages with the cylindrical body 246, the pin 254 is engaged with the groove 248 and the pin 256 is engaged with the groove 250 at the same time, so that the wire 60 is pushed and pulled by the movable member 242. Occasionally, it is possible to prevent the annular body 252 from rotating relative to the cylindrical body 246. As a result, the wire 60 can be smoothly pushed and pulled.

On the other hand, when the mounting member 244 is removed from the movable member 242 when cleaning the endoscope 10, the mounting member 244 is pulled in the direction of removing the pins 254 and 256 from the grooves 248 and 250, and the annular body 252 becomes the cylindrical body 246. The annular body 252 is removed from the cylindrical body 246 by being pulled from and expanded in diameter. As a result, the mounting member 244 is detached from the movable member 242 with a single touch.

Therefore, according to another connection structure 240, it is possible to easily attach / detach the base end of the wire 60 to the movable member 242 (standing operation mechanism) as compared with the endoscopes of Patent Documents 1 and 2 described above. can.

In the above embodiment, the movable member 242 is provided with the cylindrical body 246 and the mounting member 244 is provided with the annular body 252. However, one of the movable member 242 and the mounting member 244 is provided with the cylindrical body 246, and the other. The annular body 252 may be provided on the surface.

In the embodiment described above, as shown in FIGS. 9 and 10, the wire 126 is illustrated as an example of the driving member of the standing operation mechanism 120, but a link mechanism may be adopted instead of the wire 126.

FIG. 35 is a main part structure in which the first slider 132 and the lever 136 are connected by a link sheet metal 260 which is a link mechanism. FIG. 36 is an operation explanatory view of the link mechanism of FIG. 35.

As shown in FIGS. 35 and 36, the tip of the link sheet metal 260 is rotatably connected to the base end of the first slider 132 via the pin 262, and the base end of the link sheet metal 260 is rotatably connected to the lever 136 via the pin 264. It is rotatably connected.

As a result, when the standing operation lever 20 shown in FIGS. 9 and 10 is rotated, the linear motion of the first slider 132 can be transmitted to the lever 136 via the link sheet metal 260 which is a link mechanism. As a result, the lever 136 rotates in the rotation range of FIGS. 35 to 36, and the rotational force can be transmitted to, for example, the movable member 96 shown in FIGS. 9 and 10.

In the above embodiment, the duodenal endoscope has been described as an example of the endoscope 10, but if the endoscope is provided with a standing table at the tip of the insertion portion to adjust the direction of drawing out the treatment tool, ultrasonic endoscopy is performed. The present invention can be applied to various endoscopes such as mirrors.

Next, regarding the structure of the wire 60, other forms will be described. FIG. 37 is a perspective view of the wire 60 of the fourth aspect. The wire 60 includes an engaging member 100 provided on the tip side, an insulating wire 60C having a tip fixed to the engaging member 100, and a base end portion of the insulating wire 60C provided on the base end side. A fixed base end locking portion 60E and a fixed base end locking portion 60E are provided. The base end portion and the base end locking portion 60E of the insulating wire 60C are fixed by the same structure as in FIG. The tip of the insulating wire 60C and the engaging member 100 are fixed by forming a caulking portion.

The engaging member 100 has a cylindrical shape. The tip of the insulating wire 60C and the engaging member 100 are fixed in a positional relationship in which the axial direction of the engaging member 100 and the axial direction of the insulating wire 60C are orthogonal to each other.

As shown in FIG. 37, the insulating wire 60C is exposed except for the portion fixed by the engaging member 100 and the base end locking portion 60E. The exposed outer periphery of the insulating wire 60C is covered with an insulating tube-shaped member 60D juxtaposed with the insulating wire 60C.

FIG. 38 is a perspective view of the tip member 28 of the endoscope to which the wire 60 of FIG. 37 is applied. The same configuration as in FIG. 2 may be designated by the same reference numerals and the description thereof may be omitted.

As shown in FIG. 38, an upright lever accommodating chamber 302 for accommodating the upright stand upright lever 300 is provided on the opposite side of the upright stand accommodating chamber 82 with the partition wall 80 interposed therebetween. The upright lever accommodating chamber 302 is covered with the protective plate 304 to maintain the airtightness of the upright lever accommodating chamber 302 and is sealed from the outside air.

The engaging member 100 of the wire 60 is connected to the connecting portion 306 provided on the tip end side of the standing stand standing lever 300.

A rotating shaft 308 is provided on the base end side of the standing stand standing lever 300. The rotating shaft 308 penetrates the partition wall 80 and is coaxially connected to the rotating shafts 84 and 86 (see FIG. 5) of the upright stand 30.

The wire 60 is pushed and pulled by the operation of the standing operation lever 20. When the wire 60 is pulled by the standing operation lever 20, the wire 60 moves to the proximal end side. By this operation, the upright stand upright lever 300 rotates about the rotation shaft 308 in the direction in which the side of the connecting portion 306 moves toward the base end side. Since the rotating shafts 84 and 86 connected to the rotating shaft 308 rotate in the same direction as the rotating shaft 308, the standing table 30 can be rotated to the standing position.

When the wire 60 is pushed by the standing operation lever 20, the wire 60 moves to the tip side. By this operation, the upright stand upright lever 300 rotates about the rotation shaft 308 in the direction in which the side of the connecting portion 306 moves toward the tip end side. Since the rotation shafts 84 and 86 connected to the rotation shaft 308 rotate in the same direction as the rotation shaft 308, the standing table 30 can be rotated to the lodging position.

The wire 60 shown in FIG. 37 is composed of the insulating wire 60C and the insulating tube-shaped member 60D, and does not include the conductive wire 60A. Therefore, it is possible to prevent the current from leaking to the outside when the high frequency treatment tool is used.

Also in the wire 60 shown in FIG. 37, the insulating wire 60C is mainly used in the pulling operation, and the tube-shaped member 60D is mainly used in the pushing operation. A material suitable for the pulling operation and the pushing operation can be selected.

Next, regarding the structure of the wire 60, other forms will be described. FIG. 39 is a perspective view of the wire 60 of the fifth aspect. The wire 60 is connected to the standing table 30.

The wire 60 includes an engaging member 100 provided on the tip side, an insulating wire 60C having a tip fixed to the engaging member 100, and a base end portion of the insulating wire 60C provided on the base end side. A fixed base end locking portion 60E and a fixed base end locking portion 60E are provided. The base end portion and the base end locking portion 60E of the insulating wire 60C are fixed by the same structure as in FIG. The tip of the insulating wire 60C and the engaging member 100 are fixed by forming a caulking portion.

The engaging member 100 has a cylindrical shape. The tip of the insulating wire 60C and the engaging member 100 are fixed in a positional relationship in which the axial direction of the engaging member 100 and the axial direction of the insulating wire 60C are parallel to each other. The outer diameter of the engaging member 100 is larger than the outer diameter of the wire 60.

As shown in FIG. 39, the insulating wire 60C is exposed except for the portion fixed by the engaging member 100 and the proximal end locking portion 60E. The exposed outer periphery of the insulating wire 60C is covered with an insulating tube-shaped member 60D juxtaposed with the insulating wire 60C.

A through hole 30C for inserting the wire 60 is formed in the upright stand 30. An accommodating portion 30D, which is a space larger than the engaging member 100, is formed on one end side of the through hole 30C. A step 30E is formed by the through hole 30C and the accommodating portion 30D. Since the engaging member 100 engages with the step 30E, the wire 60 is connected to the upright stand 30.

FIG. 40 is a perspective view of the tip member 28 of the endoscope to which the wire 60 of FIG. 39 is applied. The same configuration as in FIG. 2 may be designated by the same reference numerals and the description thereof may be omitted.

The wire 60 is inserted into the through hole 30C of the upright stand 30, and the engaging member 100 of the wire 60 is engaged with the step 30E.

The wire 60 is pushed and pulled by the operation of the standing operation lever 20. When the wire 60 is pulled by the standing operation lever 20, the wire 60 moves to the proximal end side. By this operation, the tip of the upright stand 30 rotates around the rotation shafts 84 and 86 in the direction of moving toward the proximal end side, and the upright stand 30 can be rotated to the upright position.

When the wire 60 is pushed by the standing operation lever 20, the wire 60 moves to the tip side. By this operation, the tip of the standing table 30 rotates around the rotating shafts 84 and 86 in the direction of moving toward the tip side, and the standing table 30 can be rotated to the lodging position.

The wire 60 shown in FIG. 39 is composed of an insulating wire 60C and an insulating tube-shaped member 60D, and does not include the conductive wire 60A. Therefore, it is possible to prevent the current from leaking to the outside when the high frequency treatment tool is used.

Also in the wire 60 shown in FIG. 39, the insulating wire 60C is mainly used in the pulling operation, and the tube-shaped member 60D is mainly used in the pushing operation. A material suitable for the pulling operation and the pushing operation can be selected.

10 Endoscope 12 Endoscope system 14 Processor device 16 Light source device 18 Display 20 Standing operation lever 22 Operation unit 22A One side surface 22B The other side surface 24 Insertion unit 26 Tip part 28 Tip member 28A Peripheral surface 30 Standing table 30A Guide surface 30B Base 30C Through hole 30D Accommodating part 30E Step 32 Operation part Main body 34 Gripping part 36 Extension part 38 Breaking prevention pipe 38A Base end part 40 Flange 42 Treatment tool introduction port 44 Mount part 44A Tip part 46 Universal cord 48 Electric connector 50 Light source Connector 52 Curved part 54 Flexible part 56 Treatment tool 56A Tip part 58 Treatment tool Channel 60 Wire 60A Conductive wire 60B Connecting member 60C Insulating wire 60D Pipe shape member 60E Base end locking part 60F Base end clasp 60G Partition 60H Reduced diameter part 60J Rod-shaped member 60K Through hole 60L Through hole 60M Retaining pin 61 Tube 62 Wire channel 64 Angle knob 66 Air supply water supply button 68 Suction button 70 Air supply water supply nozzle 72 Treatment tool Outlet port 74 Outlet port 76 Cap 76A Opening Window 78 Partition 78A Bearing 80 Partition 80A Bearing 82 Standing stand accommodation 84 Rotating shaft 86 Rotating shaft 88 Optical system accommodation 90 Lighting window 92 Observation window 94 Introductory port 95 Valve body 96 Movable member 97 Opening forming member 98 Mounting Member 98A Mounting member 100 Engagement member 102 Engagement member 102 Accommodating groove 104 Opening 106 Engagement guide part 108 Engagement guide path 110 Deformation generation part 112 Groove 114 Groove 116 Detachment guide surface 122 Standing operation mechanism 124 First conversion mechanism 126 Wire 128 Second Conversion mechanism 130 Crank member 132 1st slider 134 2nd slider 136 Lever 138 1st gear 140 2nd gear 142 3rd gear 144 4th gear 146 Bracket 148 Axis 150 Axis 152 Drive shaft 160 Beam 160A Back side 162 Leg 164 Leg Part 166 O-ring 168 Driven shaft 170 Connection structure 170A Connection structure 172 Wire assembly 174 Engagement hole 174A Engagement hole 175 Edge part 176 Engagement part 176A Engagement part 177 Cylindrical part 178 Core part 180 Hole part 182 Notch 184 Elastic deformation part 184A Slip part 186 Claw part 186A Claw part 187 Tapered part 200 Branch pipe 202 Tip pipe 204 Pipe line 206 Pipe line 208 Suction pipe 210 Connecting structure 212 Mounting member 214 Engagement hole 216 Engagement part 218 Knob part 220 Shaft part 222 Hole part 224 Narrow part 226 Wide part 228 Diameter expansion part 230 Friction resistance part 232 Connection structure 234 Mounting member 236 Engagement part 237 Split groove 238 Diameter expansion part 240 Connection structure 242 Movable member 244 Mounting member 246 Cylindrical body 248 Groove 250 Groove 252 Ring body 253 Slit 254 Pin 256 Pin 260 Link sheet metal 262 Pin 264 Pin 300 Standing stand Standing lever 302 Standing lever accommodating chamber 304 Protective plate 306 Connecting part 308 Rotating shaft L wire Exposed area

Claims (14)

It is a standing operation wire that operates the treatment tool standing stand provided at the tip of the insertion part of the endoscope.
With the engaging member provided on the tip side of the standing operation wire,
A conductive wire whose tip is fixed to the engaging member,
With the base end locking portion provided on the base end side of the standing operation wire,
An insulating wire having a base end fixed to the base end locking portion,
A connecting member that connects the base end of the conductive wire and the tip of the insulating wire,
An insulating member juxtaposed with the insulating wire and
Standing operation wire with. The standing operation wire according to claim 1, wherein the insulating member is a tube-shaped member that covers the exposed outer periphery of the insulating wire. The standing operation wire according to claim 1, wherein the insulating member is a rod-shaped member. The standing operation according to any one of claims 1 to 3, wherein the breaking strength of the insulating wire is 100 N or more, and the elongation rate of the insulating wire when pulled at 50 N is 5% or less. Wire. The standing operation wire according to claim 4, wherein the insulating wire is made of a liquid crystal polyester fiber. Any one of claims 1 to 5, which has a brazing portion or a caulking portion for fixing the conductive wire and the connecting member, and a caulking portion for fixing the insulating wire and the connecting member. Standing operation wire described in. An operation unit provided with an operation member and
An insertion portion provided on the tip end side of the operation portion and inserted into the subject, and an insertion portion having a flexible portion, a curved portion, and a tip portion from the operation portion side.
The treatment tool stand provided at the tip and
The standing operation wire according to any one of claims 1 to 6, wherein the engaging member is connected to the treatment tool standing table, and the base end locking portion is connected to the operating member.
Equipped with an endoscope. The seventh aspect of claim 7, wherein the pressure applied to the insulating member also has a high buckling strength until the treatment tool standing base reaches the maximum lodging position from the pushing operation of the operating member. Endoscope. The connecting member is arranged in the flexible portion.
The endoscope according to claim 8. The connecting member is arranged on the tip end side of the flexible portion.
The endoscope according to claim 9. A movable member that is exposed to the outside of the operation unit and operates in conjunction with the operation of the operation member.
The endoscope according to claim 10, further comprising a mounting member provided at the base end of the standing operation wire and detachably engaging with the movable member. One of the movable member and the mounting member is provided with an engaging hole, and the other is provided with an engaging portion that is detachably engaged with the engaging hole.
The endoscope according to claim 11. The engaging portion is provided with an elastically deformed portion that elastically deforms and engages with the engaging hole.
The endoscope according to claim 12. A pair of elastically deformable claws that engage with the edge of the engaging hole are formed in the elastically deformed portion, and when the engaging hole and the engaging portion are engaged or disengaged, the elastically deformable portion is formed. , The pair of claws are displaced in a direction closer to each other by elastic deformation.
The endoscope according to claim 13.

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