JP2022018298A - Endoscope, raising base device - Google Patents

Abstract

To provide an endoscope, etc. that allow a raising base device to be easily attached to any of a plurality of endoscopes having different entire lengths without deteriorating an insertion property.SOLUTION: An endoscope 1 comprises an endoscope body 2 comprising an operation part 11 and an insertion part 12, and a raising base device 5. The raising base device 5 comprises a tip cover 63 with a raising base, a guide sheath 62 into which an operation wire 61 for rotating the raising base is inserted, fixing members 53 and 53a, and connecting member 51 and 52. The guide sheath 62 is inserted into an insertion pipe line 22 of the endoscope body 2. One of a base end side of the guide sheath 62 and a base end side of the operation wire 61 is fixed to the fixing members 53 and 53a, and the other is connected to the connecting member 51 and 52.SELECTED DRAWING: Figure 1

Description

The present invention relates to an endoscope and a riser device that raise the tip of a treatment tool extending from the tip of the endoscope.

A riser device for raising the tip of a treatment tool and an endoscope provided with the raiser device have been conventionally proposed.

For example, Japanese Patent Application Laid-Open No. 6-315458 describes a tip cover that covers the tip of the insertion portion so that the forceps riser storage chamber and the guide tube of the riser operation wire can be easily cleaned. The configuration in which the forceps raising table and the raising table operation wire are detachably attached to the endoscope is described. The base end of the raising platform operating wire is detachably connected to the raising mechanism of the operating portion by using a connector.

Further, in Japanese Patent Application Laid-Open No. 2009-273665, an endoscope in which a long guide sheath in which a riser operation wire is installed is arranged along the outer surface of the insertion portion of the endoscope is used. A tip hood with a removable treatment tool raising device is described in. The tip hood tube is attached to the tip body of the endoscope, and the guide sheath is fastened to the base end side of the outer surface of the insertion portion with an appropriate tightening band or the like.

Further, Japanese Patent No. 3228618 discloses an endoscope with a channel provided with a treatment tool channel for inserting the treatment tool and a treatment tool raising device in the endoscope cover covering the insertion portion of the endoscope. A mirror cover is listed. The treatment tool raising device includes a treatment tool raising table, a treatment tool raising wire, and / or a member for connecting an operation unit. The treatment tool raising wire is connected to, for example, an operation unit connection member, and the operation unit connection member is attached to the shaft of the bending operation knob of the operation unit of the endoscope. Then, by rotating the operation unit connecting member, the treatment tool raising wire is towed and the treatment tool raising table is raised / inverted.

Japanese Patent Application Laid-Open No. 6-315458 Japanese Patent Application Laid-Open No. 2009-273665 Japanese Patent No. 3228618

By the way, there are some types of endoscopes (short type and long type) having different total lengths of insertion portions even if they are of the same type. Further, even if the endoscope has the same type and the same type, the total length of the insertion portion may be slightly different for each machine due to the variation in manufacturing.

Further, even if the same aircraft is used, the total length of the insertion portion may change depending on the length of time that the endoscope has been used. For example, when an endoscope is used, a push-pull operation, a twist operation, and the like are frequently performed, and a force associated with the operation is applied to the insertion portion. For this reason, when the endoscope is used many times, the insertion portion gradually softens, and the total length of the insertion portion tends to increase over time.

Therefore, in the technique described in Japanese Patent Application Laid-Open No. 6-315458, not only the work of connecting the raising table operating wire is required for each case, but also the tension of the raising table operating wire needs to be adjusted. .. If the tension of the riser operation wire is too weak, the treatment tool will not be raised sufficiently, and if it is too strong, the treatment tool will not be inverted sufficiently. For this reason, adjusting the tension of the riser operation wire is a complicated and nerve-wracking task for the user.

Further, in the technique described in Japanese Patent Application Laid-Open No. 2009-273665, since the degree of raising / inversion is not affected by the length of the insertion portion of the endoscope, it is not necessary to adjust the tension of the raising table operation wire. However, since the guide sheath is arranged along the outer surface of the insertion portion, the insertability of the endoscope is lower than that in the case without the guide sheath.

Further, even in the technique described in Japanese Patent No. 3228618, it is necessary to adjust the tension of the riser operating wire, and the insertability of the endoscope is lowered.

The present invention has been made in view of the above circumstances, and is a detachable riser device for any of a plurality of endoscopes having different total lengths of insertion portions without deteriorating the insertability of the endoscope. It is an object of the present invention to provide an endoscope and a riser device that can be easily attached to an endoscope.

The endoscope according to one aspect of the present invention has an endoscope main body having an operation portion including an operation knob, an insertion portion extending from the operation portion in the insertion axis direction and having an insertion tube path, and the insertion portion. A tip cover that can be detachably attached to the tip of the tip cover, a rotatable riser provided on the tip cover, and a guide sheath that is inserted into the insertion pipe and the tip side is fixed to the tip cover. , The operation wire inserted into the guide sheath and connected to the riser on the distal end side, and one of the proximal end side of the guide sheath and the proximal end side of the operation wire are fixed and the operation is performed. The fixing member fixed to the portion and the other of the base end side of the guide sheath and the base end side of the operation wire are connected to the operation knob, and the insertion is performed according to the operation of the operation knob. A riser device having a connecting member that moves in the axial direction is provided, and in response to the movement of the connecting member, the tip end side of the operation wire connected to the riser moves, and the riser rotates. Move.

The riser device according to one aspect of the present invention is attached to a riser body having an operation unit including an operation knob and an insertion part extending from the operation unit in the insertion axis direction and having an insertion tube. A device having a tip cover detachably attached to the tip of the insertion portion, a rotatable raising table provided on the tip cover, and a tip inserted into the insertion tube and the tip of the tip cover. A guide sheath whose side is fixed, an operation wire which is inserted into the guide sheath and whose tip end side is connected to the riser, and a base end side of the guide sheath and a base end side of the operation wire. One is fixed, and the fixing member fixed to the operation portion and the other of the base end side of the guide sheath and the base end side of the operation wire are connected to the operation knob, and the operation is performed. A connecting member that moves in the insertion axis direction according to the operation of the knob is provided, and the tip end side of the operation wire connected to the raising table moves according to the movement of the connecting member, so that the raising table moves. Rotate.

According to the endoscope and the raising platform device of the present invention, the removable raising platform device can be used for any of a plurality of endoscopes having different total lengths of insertion portions without deteriorating the insertability of the endoscope. Can be easily attached to the endoscope.

In the first embodiment of the present invention, an external view showing a usage state in which an endoscope system in which a treatment tool is combined with an endoscope is inserted into a subject. In the first embodiment, the T arrow view near the operation unit of the endoscope shown in FIG. 1. In the first embodiment, the figure which shows the raising platform device before connecting the raising platform control part and the raising table tip side component part. In the first embodiment, the P arrow view of the riser control unit shown in FIG. In the first embodiment, the figure which shows the main part of the raising platform device which connected the raising platform operation wire and the guide sheath of the raising platform tip side component to the raising platform control part. The figure which shows the state which the operation part of the endoscope main body is grasped, and the raising table operation knob is operated in the said 1st Embodiment. In the first embodiment, the enlarged view shows the configuration of the base end side of the riser table operation wire and the guide sheath in the riser table tip side component. In the first embodiment, the vertical sectional view showing a state in which the base end side of the raising table operation wire and the guide sheath is connected to the raising table control unit. The QQ sectional view of the riser control unit shown in FIG. 8 in the first embodiment. In the first embodiment, the perspective view showing the state before attaching the first tip cover and the second tip cover to the tip body of the endoscope body. In the first embodiment, the perspective view showing a state in which the base end side of the guide sheath in which the raising table operation wire is arranged is inserted into the guide sheath insertion pipe line of the endoscope main body. FIG. 3 is a perspective view showing a state in which the first tip cover and the second tip cover have been attached to the tip body of the endoscope body in the first embodiment. In the first embodiment, a vertical cross-sectional view showing the tip of an endoscope in which the tip cover is attached to the tip body along the insertion axis direction. In the first embodiment, a state in which the second tip cover is removed for easy viewing is shown, and a perspective view for explaining a method of removing the tip cover from the tip body. In the first embodiment, the vertical cross-sectional view along the insertion axis direction for explaining the configuration of the modified example in which the mouthpiece provided at the tip of the guide sheath is locked to the tip body. The perspective view for demonstrating the deformation example of the material which comprises the tip main body of the endoscope main body of the said 1st Embodiment. FIG. 16 is a cross-sectional view taken along the line AA of FIG. 16 along a direction parallel to the insertion axis of the second tip body made of plastic in the first embodiment. The plan view which shows the structure of the treatment tool raising stand of the 1st modification in the tip part with the tip cover attached in the said 1st Embodiment. FIG. 18 is a cross-sectional view taken along the line BB of FIG. 18, showing the configuration of the treatment tool raising table of the first modification in the first embodiment. The cross-sectional view which shows the structure of the treatment tool raising stand of the 2nd modification in the said 1st Embodiment. The cross-sectional view which shows the structure of the treatment tool raising stand of the 3rd modification which provided the metal reinforcing member on the side surface in the said 1st Embodiment. In the first embodiment, an endoscope system in which a treatment tool is combined with an endoscope when a raising platform device is attached to the endoscope body whose total length of the insertion portion is shorter than that of the endoscope body of FIG. The external view which shows the use state which inserted into the subject. In the first embodiment, an endoscope in which a treatment tool is combined with an endoscope when a raising platform device is attached to an endoscope body in which a guide sheath outlet is arranged on the tip side of the treatment tool insertion port. External view showing the usage state when the system is inserted into the subject. In the second embodiment of the present invention, a perspective view showing a state before attaching the first tip cover and the second tip cover to the tip body of the direct-view type endoscope main body. In the second embodiment, the perspective view showing a state in which the first tip cover and the second tip cover have been attached to the tip body of the direct-view type endoscope main body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below.

In the description of the drawings, the same or corresponding elements are appropriately designated by the same reference numerals. Further, it should be noted that the drawings are schematic, and the relationship between the lengths of each element, the ratio of the lengths of each element, and the like in one drawing may differ from the reality. Further, even between a plurality of drawings, there may be a portion where the relationship and the ratio of the lengths of the drawings are different from each other.
[First Embodiment]

1 to 23 show the first embodiment of the present invention, and FIG. 1 shows a usage state in which an endoscope system in which an endoscope 1 is combined with a treatment tool 9 is inserted into a subject 100. The external view and FIG. 2 are a T-arrow view near the operation unit 11 of the endoscope 1 shown in FIG.

The endoscope 1 includes an endoscope main body 2 and a riser device 5. The endoscope 1 is configured to be used as an endoscope system in combination with the treatment tool 9.

The endoscope main body 2 includes an operation unit 11 gripped by the operator and an elongated insertion unit 12 extending from the operation unit 11 toward the tip end side in the insertion axis direction.

Here, in FIG. 1, the insertion portion 12 is inserted into the lumen 101 of the subject 100, and the raising platform device 5 is operated to direct the treatment tool tip portion 9a of the treatment tool 9 toward the pipe line 102. Shows the state of rising.

The insertion portion 12 includes a flexible tube 17 also called a serpentine tube, a curved portion 18 that bends to change the observation direction, and an illumination system and an observation system described later, in order from the base end side to the tip end side in the insertion axis direction. It is provided with a tip portion 19 provided with a.

The insertion axis direction is defined as a direction along the longitudinal direction of the endoscope 1. Therefore, when the curved portion 18 is curved, the insertion axis direction in the operation unit 11 and the insertion axis direction in the tip portion 19 do not match in three dimensions, but one dimension along the longitudinal direction of the endoscope 1. The directions are the same.

The operation unit 11 is provided with an angle knob 14 and an operation button 15, and a universal cord 13 extends from the base end side of the operation unit 11.

The angle knob 14 is an operating member for bending the curved portion 18 vertically and horizontally.

The operation button 15 corresponds to, for example, an air supply / water supply button for cleaning the observation window 24b described later of the tip portion 19, and a suction button for suctioning from the treatment tool channel opening 21b described later.

The universal code 13 includes a signal line 24 (see FIG. 17) for transmitting a signal related to imaging, a light guide 25 (see FIG. 17) for transmitting illumination light for illuminating a subject, and the like.

Further, the operation unit 11 is provided with a riser stand operation knob 16 (hereinafter, referred to as an operation knob 16) for operating the raiser stand device 5. The operation knob 16 is configured so that it can be operated coaxially with, for example, the angle knob 14, and includes a mounting hole 16a.

FIG. 6 is a diagram showing a state in which the operation unit 11 of the endoscope main body 2 is gripped and the operation knob 16 is operated.

As shown in FIG. 6, the operation knob 16 is rotated about an axis coaxial with the angle knob 14 by, for example, the thumb of the hand holding the operation unit 11.

Further, the operation unit 11 is provided with a riser device mounting portion 11a for attaching the riser device 5 to the endoscope main body 2. The riser device mounting portion 11a is configured as, for example, a peripheral recess.

A treatment tool channel 21 (see FIG. 13 and the like) and a guide sheath insertion pipe line 22 (hereinafter referred to as an insertion pipe line 22) are provided in the endoscope main body 2.

The treatment tool channel 21 is a conduit for inserting the treatment tool 9, and the treatment tool insertion port 21a on the proximal end side is open to the operation portion 11.

The insertion pipe line 22 is a pipe line for inserting the raising platform device 5, and the opening on the proximal end side of the insertion pipe line 22 opens to the operation unit 11 as the guide sheath outlet 22a. In the example shown in FIG. 1, the guide sheath outlet 22a is arranged at a position close to the treatment tool insertion port 21a. The insertion pipe line 22 is provided in the operation portion 11 and the insertion portion 12 from the guide sheath outlet 22a, and is terminated by the guide sheath insertion port 22b described later in the tip portion 19.

Here, the configuration of the riser device 5 will be described. FIG. 3 is a diagram showing a riser device 5 before connecting the riser control unit 5a and the riser tip side component 5b, and FIG. 4 is a P arrow view of the riser control unit 5a shown in FIG. 3, FIG. Is a diagram showing a main part of a riser device 5 in which a riser operation wire 61 (hereinafter referred to as an operation wire 61) and a guide sheath 62 of a riser tip side component 5b are connected to a riser control unit 5a.

The riser device 5 includes a riser control unit 5a and a riser tip side component 5b. Before attaching the riser device 5 to the endoscope main body 2, the riser control unit 5a and the riser tip side component 5b are separated. By attaching the riser control unit 5a and the riser tip side component 5b to the endoscope main body 2, respectively, the riser control unit 5a and the riser tip side component 5b are connected as described later. , An integrated riser device 5 is configured.

The riser control unit 5a includes an operation knob mounting unit 51, a control unit main body 52, an operation unit mounting unit 53, a locking button 54, a compression spring 55, and a tightening ring 56.

The operation knob mounting portion 51 is configured by, for example, bending both ends of a rigid linear member into an L shape. Specific examples of the operation knob mounting portion 51 are an operation rod, a link rod (bar-shaped link portion), and the like. When the riser control unit 5a is attached to the endoscope main body 2, the bent portion 51a on the base end side of the operation knob mounting portion 51 is detachably engaged with the mounting hole 16a of the operation knob 16.

The control unit main body 52 is provided with a mounting hole 52b, and the bent portion 51b on the tip end side of the operation knob mounting portion 51 is engaged with the mounting hole 52b. The connecting member that moves in the insertion axis direction in response to the operation of the operation knob 16 includes an operation knob mounting portion 51, a control portion main body 52 (which may further include a tightening ring 56).

The control unit main body 52 is, for example, a cylindrical member having a cylindrical shape, and is formed with a slide hole 52a that is elongated in the axial direction and penetrates in the radial direction.

A cylindrical wire fixing portion 53a is attached to the outer peripheral surface side of the control unit main body 52. In other words, the cylindrical control unit main body 52 is inserted into the cylindrical wire fixing portion 53a.

The wire fixing portion 53a is a fixing member integrally configured with the operation portion mounting portion 53. The operation unit mounting portion 53 has a C-ring shape and is detachably fitted with the riser device mounting portion 11a to fix its position with respect to the operation unit 11. Therefore, when the operation unit mounting portion 53 is fixed to the operation unit 11, the wire fixing portion 53a is also fixed to the operation unit 11.

FIG. 8 is a vertical sectional view showing a state in which the base end side of the operation wire 61 and the guide sheath 62 is connected to the raising platform control unit 5a, and FIG. 9 is a QQ sectional view of the raising platform control unit 5a shown in FIG.

A radial through hole is formed in the cylindrical wire fixing portion 53a, and one side of the through hole is a large diameter hole portion 53b and the other side of the through hole is a small diameter hole across the central axis of the wire fixing portion 53a. It is part 53c.

Further, along the central axis of the cylindrical wire fixing portion 53a, a through hole 53d is formed on the tip end side of the large diameter hole portion 53b, and a bottomed hole 53e is formed on the base end side of the large diameter hole portion 53b. Has been done. The through hole 53d and the bottomed hole 53e communicate with the large diameter hole portion 53b.

The locking button 54 is inserted into the large-diameter hole 53b of the wire fixing portion 53a and the slide hole 52a of the control unit main body 52, and the tip of the locking button 54 is inserted into the small-diameter hole 53c. The control unit body 52 can be moved in the insertion axis direction from the position where the wire fixing portion 53a abuts on the tip end side of the slide hole 52a (see FIG. 8) to the position where the wire fixing portion 53a abuts on the base end side of the slide hole 52a. It becomes a range.

The locking button 54 extends the large-diameter shaft portion 54b from the button head 54a for pressing with a finger or the like, and further aligns the small-diameter shaft portion 54c on the tip side of the large-diameter shaft portion 54b with the large-diameter shaft portion 54b. It is extended. The large-diameter shaft portion 54b is inserted into the large-diameter hole portion 53b of the wire fixing portion 53a, and the small-diameter shaft portion 54c is inserted into the small-diameter hole portion 53c of the wire fixing portion 53a.

Further, in the locking button 54, an elongated hole 54d (see FIG. 9) in the axial direction from the large diameter shaft portion 54b to the small diameter shaft portion 54c is formed as a hole (see FIG. 8) penetrating in the slide hole 52a direction. ing.

A compression spring 55 is arranged on the outer peripheral side of the large-diameter shaft portion 54b between the button head 54a and the wire fixing portion 53a. The compression spring 55 urges the button head 54a in a direction away from the wire fixing portion 53a.

A male screw 52f and, for example, a tapered portion 52e provided with a radial notch (not shown) are formed on the tip side of the control unit main body 52 with respect to the slide hole 52a. A sheath receiving hole 52c is formed along the central axis of the tapered portion 52e, and a wire insertion hole 52d that communicates the sheath receiving hole 52c and the slide hole 52a is further formed along the central axis of the control unit main body 52.

The tightening ring 56 is a cylindrical member, and has a tapered surface 56e formed on the distal end side of the inner peripheral surface and a female screw 56f formed on the proximal end side.

Guide sheath connection for connecting the base end side of the guide sheath 62 by the combination of the tightening ring 56 and the portion of the control unit main body 52 on the tip side of the slide hole 52a (including the tapered portion 52e and the male screw 52f). The part is composed.

FIG. 7 is an enlarged view showing the configuration of the base end side of the operation wire 61 and the guide sheath 62 in the riser tip end side component 5b.

The operation wire 61 is inserted into the long guide sheath 62, and the proximal end side of the operation wire 61 extends from the proximal end side of the guide sheath 62. Here, the guide sheath 62 and the operation wire 61 are configured to be expandable and contractible in the longitudinal direction.

A wire terminal member 64 is fixed to the base end of the operation wire 61 by a fixing method such as soldering, bonding, or caulking. A recess 64a having a small diameter is formed in the central portion of the wire terminal member 64, and the tip end side and the proximal end side of the recess 64a have a larger diameter than the recess 64a.

When connecting the riser control unit 5a and the riser tip side component 5b, the locking button 54 is pressed so that the elongated hole 54d communicates coaxially with the through hole 53d and the bottomed hole 53e. .. In this state, the base end side of the operation wire 61 and the guide sheath 62 is inserted into the control unit main body 52 from the sheath receiving hole 52c. Since the guide sheath 62 has a larger diameter than the wire insertion hole 52d, it is not inserted into the wire insertion hole 52d and stays in the sheath receiving hole 52c.

The operation wire 61 is sequentially inserted into the wire insertion hole 52d, the through hole 53d, the elongated hole 54d, and the bottomed hole 53e, and the insertion ends when the tip of the wire terminal member 64 abuts on the bottomed hole 53e. At this time, the recess 64a is located in the elongated hole 54d.

When the pressing of the locking button 54 is stopped in this state, the locking button 54 moves in the direction in which the button head 54a is separated from the wire fixing portion 53a by the urging force of the compression spring 55. Then, the recess 64a engages with the lower surface (locking portion) of the elongated hole 54d in the small diameter shaft portion 54c.

As described above, since the tip end side and the proximal end side of the recess 64a in the wire terminal member 64 have a larger diameter than the recess 64a, the recess 64a engages with the small diameter shaft portion 54c on the lower surface of the elongated hole 54d. As a result, the movement of the operation wire 61 in the L direction relative to the wire fixing portion 53a is prohibited. Since the wire fixing portion 53a is integrally configured with the operation portion mounting portion 53 as described above, the base end side of the operation wire 61 is fixed to the operation portion 11.

In this way, the operation of fixing the base end side of the operation wire 61 to the wire fixing portion 53a is performed by a one-touch operation of pressing and releasing the locking button 54.

After that, by screwing the female screw 56f into the male screw 52f, the tapered surface 56e presses the tapered portion 52e having a radial notch, the tapered portion 52e is reduced in diameter, and the guide sheath 62 is connected to the control unit main body 52. .. In this way, the so-called collet chuck that connects the guide sheath 62 by tightening the tubular tapered portion 52e with the tightening ring 56 is a specific configuration example of the guide sheath connecting portion.

The control unit main body 52 is slidable in the L direction of FIG. 8 with respect to the operation unit mounting unit 53. Therefore, even if the operation wire 61 is fixed to the operation unit 11, the guide sheath 62 can move with respect to the operation unit 11. In this way, when the operation knob 16 is rotated as shown in FIGS. 1 and 6, the control unit main body 52 moves forward and backward in the L direction with respect to the wire fixing portion 53a, and the base end side of the guide sheath 62 is in the L direction. Advance and retreat to.

By performing the reverse operation of the above, the operation wire 61 and the guide sheath 62 can be removed from the riser control unit 5a. In this way, the operation wire 61 and the guide sheath 62 are detachable from the riser control unit 5a.

FIG. 10 is a perspective view showing a state before the first tip cover 65 and the second tip cover 66 are attached to the tip body 31 of the endoscope body 2, and FIG. 11 is a guide sheath in which the operation wire 61 is arranged inside. A perspective view showing a state in which the proximal end side of 62 is inserted into the insertion tube 22 of the endoscope main body 2, FIG. 12 shows the endoscope main body 2 with the first tip cover 65 and the second tip cover 66. FIG. 13 is a perspective view showing a state in which the tip cover 63 has been attached to the tip body 31, and is a vertical cross-sectional view along the insertion axis direction showing the tip 19 of the endoscope 1 to which the tip cover 63 is attached to the tip body 31. be.

The tip cover 63 is a member that is detachably attached to the tip 19 of the insertion portion 12 of the endoscope 1 to cover the tip 19, and is provided with a treatment tool raising table 71 (hereinafter referred to as a raising table 71). It is a tip cover with a raising stand.

The tip cover 63 is configured by combining a first tip cover 65 and a second tip cover 66. The first tip cover 65 is formed of, for example, hard plastic so that the tip side has a dome shape (hemispherical shape) to ensure smooth insertion. The second tip cover 66 is arranged on the base end side of the outer periphery of the first tip cover 65, and is formed in a cylindrical shape by, for example, rubber.

The endoscope main body 2 at the tip 19 of the endoscope 1 is provided with a tip main body 31 (tip component). A nozzle 23b, an observation window 24b, and an illumination window 25b are arranged on the tip main body 31, and the endoscope 1 is a side-viewing endoscope.

The observation window 24b is an optical member arranged on the outermost side of the image pickup unit 24a (see FIG. 17) for capturing an optical image of the subject 100.

The illumination window 25b is an optical member that irradiates the subject 100 with the illumination light transmitted by the light guide 25 (see FIG. 17).

The nozzle 23b is a member for discharging the gas / liquid (water) transmitted by the air supply / water supply channel 23 (see FIG. 17) toward the observation window 24b and cleaning the observation window 24b.

Further, the treatment tool channel opening 21b and the guide sheath insertion port 22b are opened in the tip main body 31.

The treatment tool channel opening 21b is an opening for inserting from the treatment tool insertion port 21a of the operation unit 11 and extending the tip end side of the treatment tool 9 through which the treatment tool channel 21 (see FIG. 13 and the like) is inserted. ..

The guide sheath insertion port 22b is an insertion port for inserting the operation wire 61 of the riser tip end side component 5b and the base end side of the guide sheath 62 into the insertion pipe line 22. The operation wire 61 and the guide sheath 62 inserted into the insertion pipe line 22 are taken out from the guide sheath outlet 22a of the operation unit 11 and guided to the outside of the operation unit 11.

The operation wire 61 and the guide sheath 62 extending from the guide sheath outlet 22a are attached to the riser control unit 5a with an extra length.

As shown in FIG. 1, the operation knob 16 and the connecting member (operation knob mounting portion 51 and control unit main body 52) are arranged on the opposite side of the guide sheath outlet 22a with respect to the central axis of the operation portion 11. Has been done. Therefore, the operation wire 61 and the guide sheath 62 are attached to the riser control unit 5a after drawing a loop shape, for example, as shown in FIG. Thus, in the example shown in FIG. 1, the lengths of the operation wire 61 and the guide sheath 62 are designed so as to have an extra length sufficient for drawing the loop shape.

Further, the tip main body 31 is provided with a concave groove 31a, a locking pin 31b, and a support bearing 31c.

The concave groove 31a is a guide groove provided in the tip main body 31 in parallel with the insertion axis direction. When the first tip cover 65 is slid and attached to the tip body 31, the concave groove 31a engages with the protrusion 65a in the insertion axis direction provided in the first tip cover 65. Then, the concave groove 31a positions the first tip cover 65 with respect to the tip body 31, and guides the sliding operation of the first tip cover 65 in the insertion axis direction.

The locking pin 31b is provided so as to project in the outer diameter direction from the peripheral surface on the base end side of the tip portion main body 31. The first tip cover 65 is provided with a locking hole 65b and a plurality of slits 65g parallel to the insertion axis direction sandwiching the locking hole 65b. When the first tip cover 65 is slid toward the proximal end side along the concave groove 31a, the portion sandwiched between the plurality of slits 65g rides on the locking pin 31b and spreads in the outer diameter direction, and finally the locking pin 31b. And the locking hole 65b engage. The first tip cover 65 and the tip body 31 are positioned and locked in the insertion axis direction by the engaging portion formed by the locking pin 31b and the locking hole 65b, and the first tip cover 65 is attached. Is finished.

Further, the tip cover 63 is attached to the endoscope main body 2 by fitting the second tip cover 66 so as to cover the locking hole 65b on the outer periphery of the first tip cover 65 on the base end side. The second tip cover 66 may be pre-assembled to the first tip cover 65, or may be integrally molded with the first tip cover 65.

A riser 71 made of a metal such as stainless steel (SUS) is provided in the riser storage portion in the first tip cover 65. The raising table 71 is provided with a groove 71a on which the tip end portion of the treatment tool 9 is placed, and is rotatable about the support shaft 72. The support bearing 31c of the tip main body 31 is provided in the vicinity of the outlet side of the treatment tool channel opening 21b, and rotatably supports the support shaft 72.

A tip terminal member 67 is provided at the tip of the operation wire 61. The tip end terminal member 67 is raised at a position away from the support shaft 72 of the riser 71 that rotates about the support shaft 72 (when the riser base 71 is inverted, the position on the tip side of the support shaft 72). It is connected to the upper platform 71. With such a configuration, when the tip end terminal member 67 moves to the base end side, the riser stand 71 rises, and when the tip end terminal member 67 moves to the tip end side, the riser stand 71 is inverted.

The first tip cover 65 is provided with a cover opening 65c, and the observation window 24b and the illumination window 25b can be exposed to the outside through the cover opening 65c and face the subject 100. Further, when the raising table 71 rises, as shown in FIG. 13, the raising table 71 projects to the outside through the cover opening 65c.

As shown in FIG. 10, a tip end side notch 65d is provided on the proximal end side of the cover opening 65c, and a proximal end side notch 65e is provided on the proximal end side of the distal end side notch 65d. The fragile portion 65f is located between the tip end side notch 65d and the base end side notch 65e.

The tip of the guide sheath 62 is fixed to the first tip cover 65 on the opposite side of the locking hole 65b sandwiching the fragile portion 65f. As shown in FIG. 13, a base 68 is provided at the tip of the guide sheath 62, and by fixing the base 68 to the guide sheath fixing portion 65h, the tip of the guide sheath 62 is fixed to the first tip cover 65. Will be done. The tip side of the operation wire 61 can be moved in and out from the tip of the guide sheath 62 including the base 68.

As shown in FIG. 13, the guide sheath 62 is configured by covering the outer peripheral side of the coil 62a with a tube 62b formed of, for example, plastic, and is expandable and contractible in the longitudinal direction.

As described above, the first tip cover 65 is fixed to the tip body 31 by engaging the locking pin 31b and the locking hole 65b. Therefore, the guide sheath 62 fixed to the first tip cover 65 is fixed to the tip main body 31 via the engagement between the locking pin 31b and the locking hole 65b.

As shown in FIG. 13, a plurality of curved pieces 27 are continuously provided inside the curved portion 18, and the tip of the curved wire 26 for performing the bending operation by the angle knob 14 is fixed to, for example, the curved piece 27 at the tip. Has been done.

Further, the second tip cover 66 is fitted on the outer peripheral side of the insulating ring 73 provided on the tip body 31.

Next, an example of the procedure for attaching the riser device 5 to the endoscope main body 2 will be described.

In the initial state before mounting the riser device 5, as shown in FIG. 3, the riser control unit 5a and the riser tip side component 5b are separated (if they are not separated, they are separated). And set the initial state). Further, as shown in FIG. 10, the first tip cover 65 and the second tip cover 66 are separated, for example.

From such an initial state, as shown in FIG. 1, first, the operation unit mounting portion 53 of the riser base control unit 5a is attached to the riser base device mounting portion 11a of the operation unit 11, and then the operation knob mounting portion 51 The bent portion 51a is attached to the mounting hole 16a of the operation knob 16. The operation knob mounting portion 51 may be attached to the operation knob 16 even after the riser base control unit 5a and the riser base tip side component portion 5b are connected.

Then, the guide sheath 62 into which the operation wire 61 of the rising platform tip side component 5b is inserted is inserted from the guide sheath insertion port 22b, inserted into the insertion pipe passage 22, and extended from the guide sheath outlet 22a.

Further, after the first tip cover 65 is attached to the tip body 31 as described above and the locking hole 65b is engaged with the locking pin 31b, the second tip cover 66 is attached to the first tip cover 65. Attach to the outer peripheral side. As shown in FIG. 11, the tip cover 63 may be attached to the tip body 31 after the first tip cover 65 and the second tip cover 66 are integrated to form the tip cover 63. do not have.

Subsequently, the operation wire 61 and the guide sheath 62 extended from the guide sheath outlet 22a are looped as shown in FIG. 1, and then the locking button 54 is pressed while the control unit main body 52 is pressed. It is inserted into the sheath receiving hole 52c. When the base end of the wire terminal member 64 hits the bottom of the bottomed hole 53e, the pressing of the locking button 54 is released to fix the wire terminal member 64 to the wire fixing portion 53a. Further, the tightening ring 56 is tightened to fix the base end portion of the guide sheath 62 to the tip end side of the control unit main body 52.

By such a procedure, the raising platform device 5 is attached to the endoscope main body 2. However, the above is an example of the mounting procedure, and some procedures may be performed in a different order. For example, after connecting the riser control unit 5a and the riser tip side component 5b, the operation unit mounting portion 53 may be attached to the riser device mounting portion 11a.

Subsequently, in the endoscope 1 in which the raising table device 5 is attached to the endoscope main body 2, the action when the raising table 71 is raised / inverted is as follows.

As described above, the guide sheath 62 is composed of the coil 62a and the tube 62b and is expandable and contractible. Further, the operation wire 61 is also expandable and contractible as described above.

When the operator rotates the operation knob 16 from the inverted position shown by the two-dot chain line in FIG. 1 to the rising position shown by the solid line in FIG. 1, the control unit main body 52 is moved to the tip side via the operation knob mounting portion 51. Move to (right side in the L direction in FIG. 8). However, the wire fixing portion 53a does not move because it is fixed to the operation portion 11 by the operation portion mounting portion 53.

Since the base end side of the guide sheath 62 is fixed to the tip end side of the control unit main body 52, as the control unit main body 52 moves to the tip end side, the base end side of the guide sheath 62 also moves to the tip end side. On the other hand, the tip end side of the guide sheath 62 is fixed to the first tip cover 65 and, by extension, the tip portion main body 31 by the mouthpiece 68. Therefore, as a result of the proximal end side of the guide sheath 62 moving to the distal end side, the guide sheath 62 is compressed in the longitudinal direction (insertion axis direction) as a whole.

Since the base end side of the operation wire 61 is fixed in the position in the insertion axis direction with respect to the wire fixing portion 53a and the operation portion 11, the operation knob 16 does not move even if the operation knob 16 is operated. On the other hand, since the tip end side of the operation wire 61 is connected to the riser stand 71 that rotates around the support shaft 72 by the tip end terminal member 67, it can move with the rotation of the riser stand 71. Then, when the entire guide sheath 62 is compressed in response to the rotation operation of the operation knob 16, the operation wire 61 is also compressed together with the guide sheath 62, and the tip end side of the operation wire 61 moves to the proximal end side in the insertion axis direction. do.

As a result, the raising table 71 is pulled toward the base end side via the tip terminal member 67, rotates around the support shaft 72, and rises.

Further, when the operator rotates the operation knob 16 from the rising position shown by the solid line in FIG. 1 to the inverted position shown by the two-dot chain line in FIG. 1, the control unit main body 52 passes through the operation knob mounting portion 51. It moves to the base end side (left side in the L direction in FIG. 8), and the base end side of the guide sheath 62 also moves to the base end side. As a result, the compression of the guide sheath 62 in the longitudinal direction is released.

Then, the compression of the operation wire 61 is released together with the guide sheath 62, and the tip end side of the operation wire 61 moves to the tip end side in the insertion axis direction. Due to the relaxation of the operation wire 61, the raising table 71 rotates around the support shaft 72 and is inverted.

In the above description, the base end side of the operation wire 61 is fixed to the operation portion 11 by a fixing member (wire fixing portion 53a and the operation portion mounting portion 53), and the base end side of the guide sheath 62 is a connecting member (operation knob mounting portion 51). An example of being connected to the control unit main body 52) and movable with respect to the operation unit 11 has been described.

However, instead of this, the proximal end side of the guide sheath 62 is fixed to the operating portion 11 by the fixing member, and the proximal end side of the operating wire 61 is connected to the connecting member and is movable with respect to the operating portion 11. The configuration of 2 may be adopted. Specifically, the base end side of the guide sheath 62 is fixed to the wire fixing portion 53a (however, in this case, it is more appropriate to call it the guide sheath fixing portion), and the base end side of the operation wire 61 is the control unit main body 52. It may be configured to be connected to. Even in this case, the point that the tip end side of the guide sheath 62 is fixed to the tip cover 63 and the tip end side of the operation wire 61 is connected to the raising table 71 is the same.

In such a second configuration, the operation wire 61 and the guide sheath 62 do not need to be stretchable, but the operation wire 61 needs to be movable in the longitudinal direction in the guide sheath 62. In the second configuration, the position of the operation knob 16 in FIG. 1 is the inverted position as shown by the solid line and the rising position as the position shown by the two-dot chain line. That is, when the operation knob 16 is operated to move the control unit main body 52 to the base end side, the entire operation wire 61 moves to the base end side with respect to the guide sheath 62, and the raising base 71 rises. Further, if the operation knob 16 is operated to move the control unit main body 52 toward the tip end side, the entire operation wire 61 moves toward the tip end side with respect to the guide sheath 62, and the raising table 71 is inverted.

In this way, the tip end side of the guide sheath 62 is fixed to the tip cover 63, the tip end side of the operation wire 61 is connected to the raising table 71, and then the inside of the base end side of the guide sheath 62 and the base end side of the operation wire 61. If one is fixed to the operation unit 11 by the fixing member and the other is connected to the operation knob 16 by the connecting member, the tip end side of the operation wire 61 connected to the raising table 71 moves according to the movement of the connecting member. However, the riser 71 can be rotated to raise / invert the riser 71.

Further, an example of the procedure for removing the riser device 5 from the endoscope main body 2 is as follows.

For example, the tightening ring 56 is loosened to release the fixation of the base end portion of the guide sheath 62 to the tip end side of the control unit main body 52.

Next, the locking button 54 is pressed to release the fixing of the wire terminal member 64 to the wire fixing portion 53a, and the operation wire 61 and the guide sheath 62 are pulled out from the riser control unit 5a.

Here, FIG. 14 shows a state in which the second tip cover 66 is removed for easy viewing, and is a perspective view for explaining a method of removing the tip cover 63 from the tip body 31. ..

Next, the fragile portion 65f is broken by pressing the opening edge 65c1 of the cover opening 65c with a finger and applying a force in the direction of arrow F (circumferential direction) in FIG. When the fragile portion 65f is broken and the opening edge 65c1 is opened in the outer diameter direction, the engagement state between the locking pin 31b and the locking hole 65b is released.

Although the second tip cover 66 is actually attached to the outer peripheral side of the fragile portion 65f, the second tip cover 66 is made of an elastic member such as rubber, so that the second tip cover 66 is attached. It is possible to break the fragile portion 65f with the 66 attached.

At this time, the guide sheath fixing portion 65h for fixing the base 68 at the tip of the guide sheath 62 is provided on the opposite side of the locking hole 65b (and the locking pin 31b) sandwiching the fragile portion 65f in the circumferential direction. Therefore, when the fragile portion 65f is broken, the insertion pipe line 22 is not damaged.

Subsequently, the first tip cover 65 is removed from the tip body 31 by pulling out the first tip cover 65 toward the tip side in the insertion axis direction. As described above, in the state where the connection between the riser control unit 5a and the riser tip side component 5b is released, the guide sheath 62 and the operation wire 61 are further pulled out from the insertion pipe line 22 to form the riser tip side configuration. The portion 5b is separated from the endoscope main body 2.

After that, the bent portion 51a of the operation knob mounting portion 51 is removed from the mounting hole 16a of the operation knob 16.

Then, by removing the operation unit mounting portion 53 of the riser stand control unit 5a from the riser stand device mounting portion 11a of the operation unit 11, the riser stand control unit 5a is separated from the endoscope main body 2, and a series of removal procedures can be performed. finish.

By such a procedure, the raising platform device 5 is removed from the endoscope main body 2. However, the above is an example of the removal procedure, and some procedures may be performed in a different order. For example, even if the riser control unit 5a is separated from the endoscope main body 2 before the riser tip side component 5b is disconnected from the riser control unit 5a and the riser tip side component 5b. It doesn't matter, etc.

FIG. 15 is a vertical cross-sectional view along the insertion axis direction for explaining the configuration of a modified example in which the base 68 provided at the tip of the guide sheath 62 is locked to the tip main body 31.

The base 68 is adhered to and fixed to the coil 62a of the guide sheath 62 and the first tip cover 65.

An elastically deformable extending portion 69 is formed integrally with the base 68 on the tip side of the base 68. The extending portion 69 is provided with a second locking hole 69a. On the other hand, a second locking pin 31d is provided so as to project from the tip main body 31.

When the first tip cover 65 is slid toward the tip body 31 along the insertion axis direction, the extending portion 69 abuts on the second locking pin 31d and bends (in the two-dot chain line of FIG. 15). (See portion), the second locking hole 69a engages the second locking pin 31d.

With such a configuration, the guide sheath 62 is directly locked to the tip main body 31 by using the base 68 having the extending portion 69. When a compressive force is applied to the guide sheath 62 by operating the operation knob 16, a force pushed toward the tip side acts on the tip of the guide sheath 62, and this force is applied to the second locking hole 69a and the second. Since the tip cover 63 is directly received by the tip body 31 due to the engagement with the locking pin 31d, the tip cover 63 does not act as a force to fall off.

Further, when the first tip cover 65 is removed from the endoscope main body 2, the fragile portion 65f is broken to release the engagement state between the locking pin 31b and the locking hole 65b, and the extending portion 69 is provided. After lifting the tip side to release the engagement state between the second locking hole 69a and the second locking pin 31d, the first tip cover 65 is pulled out to the tip side. In this way, the base 68 of the modified example of FIG. 15 is detachably fixed to the tip main body 31.

Other effects of the configuration shown in FIG. 15 are similar to the effects of the configuration shown in FIG.

FIG. 16 is a perspective view for explaining a modified example of the material constituting the tip portion main body 31 of the endoscope main body 2, and FIG. 17 is a perspective view of the second tip portion main body 31B made of plastic, which is parallel to the insertion axis. FIG. 16 is an AA cross-sectional view of FIG. 16 along the direction.

The tip body 31 is not limited to being integrally formed of a single material, and as shown in FIG. 16, for example, a first tip body 31A made of metal and a second tip body 31 made of plastic. It may be a two-body structure with the tip body 31B of the above.

In the case of a two-body structure, the treatment tool channel opening 21b and the guide sheath insertion port 22b are provided in the first tip main body 31A made of metal to connect the treatment tool channel 21 and the insertion pipe line 22, respectively. It is preferable to do so. Further, it is preferable to provide at least one support bearing 31c1 of the pair of support bearings 31c that receives the support shaft 72 of the raising platform 71 on the first tip main body 31A. As shown in FIG. 16, the other bearing 31c2 may be provided on the second tip main body 31B made of plastic, or if structurally possible, it may be provided on the first tip main body 31A. You may.

Similarly, the second tip body 31B made of plastic includes an image pickup unit 24a (observation system) including an observation window 24b, an illumination system including an illumination window 25b, and an air supply / water supply system including a nozzle 23b. It is preferable to form a structure.

By adopting the two-body structure as described above as the tip portion main body 31, the compressive force of the guide sheath 62 generated when the treatment tool tip portion 9a is raised by the raising table 71 is the first made of metal. Since it can be received by the tip body 31A, it is possible to prevent the first tip body 31A from being damaged even if the raising / inversion is repeated.

Further, by making a part of the tip body 31 a second tip body 31B made of plastic, the tip body 31 is cheaper than the whole tip body 31 made of metal.

As shown in FIG. 17, a signal line 24 is connected to an image pickup unit 24a including an observation window 24b, an image pickup device (not shown), and an image pickup circuit. The signal line 24 is inserted through the endoscope main body 2 and is connected to a processor (not shown) including an image processing device that processes an image pickup signal via a universal cord 13.

Further, the illumination light emitted from a light source device (not shown) is transmitted by the light guide 25 constituting the illumination system. The illumination light transmitted by the light guide 25 is supplied to the illumination window 25b and is irradiated from the illumination window 25b toward the subject 100.

Here, the light guide 25 may be configured by using glass fibers, but is not limited to this, and may be configured by twisting, for example, a plurality of plastic fibers. By using the plastic fiber in this way, it is possible to reduce the price and weight of the light guide 25 as compared with the case of using the glass fiber.

In addition, the diameter of the single wire of the plastic fiber is larger and the diameter of the single wire is larger than that of the glass fiber. For this reason, the light guide 25 made of plastic fiber is more likely to buckle due to the bending of the curved portion 18 than the light guide 25 made of glass fiber. At this time, if the light guide 25 is configured by simply bundling a plurality of plastic fibers, each plastic fiber may bend in a different direction, and even if the bending of the curved portion 18 is restored, each plastic fiber may bend. Each may not return to its original position. Therefore, by twisting a plurality of plastic fibers to form the light guide 25 (which is used as a stranded wire), movement in different directions is prevented and each plastic fiber is prevented from breaking.

FIG. 18 is a plan view showing the configuration of the raising platform 71A of the first modification in the tip portion 19 with the tip cover 63 attached, and FIG. 19 is FIG. 18 showing the configuration of the raising platform 71A of the first modification. It is a BB sectional view.

In the above description, an example in which the riser 71 is made of a metal such as stainless steel (SUS) has been described, but the present invention is not limited thereto.

As shown in FIGS. 18 and 19, the base portion of the riser 71A is made of plastic, and a metal member 74 is provided at a portion where sliding with the treatment tool 9, for example, the tip of the groove 71a of the riser 71A. It doesn't matter. The metal member 74 is formed of, for example, a metal plate. The metal member 74 is fixed to the base portion of the riser 71A by being engaged with both sides of the mounting holes 71b formed in the riser 71 by bending both sides of the base end portion.

FIG. 20 is a cross-sectional view showing the configuration of the raising platform 71B of the second modification.

In the raising table 71B of the second modification, a metal member 75 formed of a metal plate or the like is arranged so as to cover almost the entire length of the groove 71a with respect to the base portion of the raising table 71A made of plastic. It has become. When this metal member 75 is used, the portion where sliding with the treatment tool 9 occurs is covered more widely than the above-mentioned metal member 74.

If the configurations shown in FIGS. 18 to 20 are adopted, since the base portion of the riser 71 is made of plastic, the weight is reduced as compared with the case where the riser 71 is made of metal such as stainless steel (SUS). It can be manufactured at low cost. By arranging the metal member 74 or the metal member 75 on the metal member 74, even if the treatment tool 9 is made of metal, for example, it is possible to prevent the plastic portion of the riser table 71 from being scraped by the advancement and retreat of the treatment tool 9. ..

FIG. 21 is a cross-sectional view showing the configuration of the riser table 71C of the third modification in which the metal reinforcing member 76 is provided on the side surface.

The riser table 71C is provided with a mounting hole 71b, and the metal member 74 is mounted on the mounting hole 71b, which is the same as the example shown in FIG.

Further, a metal reinforcing member 76 that connects the tip terminal member 67 and the support shaft 72 is integrally provided on the side surface of the riser table 71C. In the reinforcing member 76, the first hole 76a is supported by the tip terminal member 67, and the second hole 76b is supported by the support shaft 72.

Here, the case where the reinforcing member 76 is made of metal has been taken as an example, but the present invention is not limited to this, and any material having higher strength than the plastic constituting the foundation portion of the riser 71C may be used. The reinforcing member 76 may be configured by using an appropriate material of the above.

In this way, since the tip end member 67 of the operation wire 61 and the support shaft 72 of the raising table 71C are connected by using the reinforcing member 76 having high strength, even if a large force is applied when raising the raising table 71C, It is possible to prevent the riser 71C from being deformed.

FIG. 22 shows an endoscope in which the treatment tool 9 is combined with the endoscope 1 when the raising platform device 5 is attached to the endoscope main body 2A whose total length of the insertion portion 12 is shorter than that of the endoscope main body 2 of FIG. FIG. 3 is an external view showing a usage state in which the mirror system is inserted into the subject 100.

The total length L2 of the insertion portion 12 of the endoscope main body 2A of FIG. 22 is shorter than the total length L1 of the insertion portion 12 of the endoscope main body 2 of FIG. 1 (indicated by a two-dot chain line in FIG. 22) (L2 < L1).

Then, the lengths of the operation wire 61 and the guide sheath 62 taken out from the guide sheath outlet 22a of the operation unit 11 and connected to the riser control unit 5a are shown in FIG. 22 as compared with the example shown in FIG. The example shown is longer.

Therefore, the loop diameter R2 shown in FIG. 22 of the operation wire 61 and the guide sheath 62 extending from the guide sheath outlet 22a is larger than the two-dot chain line of FIG. 22 and the loop diameter R1 shown in FIG. Yes (R2> R1).

The structure of the raising platform device 5 itself is the same in FIGS. 1 and 22, and the procedure for attaching the raising platform device 5 to the endoscope main bodies 2 and 2A is also the same in FIGS. 1 and 22. Therefore, the mounting workability and operability of the raising table 71 are the same in the configuration shown in FIG. 1 and the configuration shown in FIG. 22.

In this way, the endoscope 1 of the present embodiment is not affected by the difference in the total length of the insertion portion 12 of the endoscope main body, and for example, the operability of the riser 71 does not depend on the difference in the total length of the insertion portion 12. It will be the same.

If the riser device 5 is designed according to the endoscope 1 having the longest total length of the insertion portion 12 among the plurality of endoscopes 1 having different total lengths of the insertion portion 12, the riser device 5 of the same model can be used. Can be applied to any endoscope 1.

FIG. 23 shows the inside of the endoscope 1 combined with the treatment tool 9 when the raising platform device 5 is attached to the endoscope main body 2B in which the guide sheath outlet 22a is arranged on the tip side of the treatment tool insertion port 21a. FIG. 3 is an external view showing a usage state in which the endoscope system is inserted into the subject 100.

In the endoscope main body 2B shown in FIG. 23, the guide sheath outlet 22a is arranged on the distal side of the treatment tool insertion port 21a and on the opposite side of the treatment tool insertion port 21a in the circumferential direction.

That is, since the guide sheath outlet 22a is arranged on the tip side in the insertion axis direction of the riser control unit 5a, it is not essential to loop the operation wire 61 and the guide sheath 62 extending from the guide sheath outlet 22a. .. For this purpose, the extended operation wire 61 and the guide sheath 62 are connected to the riser control unit 5a with an extra length without looping, as shown in FIG. 23.

Even when the raising table device 5 is attached to the endoscope main body 2B having such a configuration, the raising table 71 can be operated with the same operability as the endoscope 1 of FIGS. 1 and 22.

As described above, the riser control unit 5a and the riser tip side component 5b are separated in the initial state and are connected when they are attached to the endoscope main body 2. The riser control unit 5a can be used repeatedly, but the riser tip side component 5b is basically disposable because it breaks the fragile portion 65f when it is removed from the endoscope main body 2. Therefore, the operating wire 61 and the guide sheath 62 are prepared with various types of riser tip end side constituent parts 5b as products, depending on the total length of the insertion part 12 of the endoscope main body 2 held by the user. , The user may be able to purchase an appropriate type of riser tip side component 5b.

According to such a first embodiment, the tip end side of the operation wire 61 inserted in the guide sheath 62 is connected to the raising table 71, the tip end side of the guide sheath 62 is fixed to the tip cover 63, and the guide sheath is used. One of the base end side of 62 and the base end side of the operation wire 61 is fixed to the fixing member (wire fixing portion 53a and operation portion mounting portion 53), and the other is fixed to the connecting member (operation knob mounting portion 51 and operation knob mounting portion 53). It is connected to the operation knob 16 by the control unit main body 52). For this reason, it is not necessary to adjust the tension of the operation wire 61 when attaching the riser device 5 to the endoscope main bodies having different lengths of the insertion portions 12. Further, the riser device 5 can be attached to and detached from any of the plurality of endoscope main bodies having different lengths of the insertion portions 12 with the same operability. Further, it is possible to perform an operation of raising / inverting the raising table 71 without depending on the length of the insertion portion 12.

Since the operation wire 61 and the guide sheath 62 have a structure in which the insertion tube 22 inside the endoscope main body 2 is inserted, the operation wire and the like are arranged outside the endoscope main body 2 with the endoscope. In comparison, insertability is improved.

By fixing the base end side of the operation wire 61 to the fixing member and connecting the base end side of the guide sheath 62 to the connecting member, in the configuration of FIG. 1, in the configuration of FIG. 1, the rotation direction of the operation knob 16 and the riser base Since the rotation direction of the tip portion 9a of the treatment tool according to 71 is the same, intuitive operability is improved.

On the other hand, by fixing the base end side of the guide sheath 62 to the fixing member and connecting the base end side of the operation wire 61 to the connecting member, the elasticity of the operation wire 61 and the guide sheath 62 is not required, while the elasticity of the operation wire 61 and the guide sheath 62 is not required. It is possible to raise / invert the riser 71.

Since the operation wire 61 and the guide sheath 62 extended from the guide sheath outlet 22a are attached to the riser control unit 5a with an extra length, various endoscope bodies having different total lengths of the insertion unit 12 are used. It will be possible to deal with the second magnitude more widely.

Since the operation wire 61 and the guide sheath 62 extended from the guide sheath outlet 22a are attached to the riser control unit 5a after drawing the loop shape, the total length of the operation unit 11 of the endoscope 1 is lengthened. The riser device 5 can be attached to the endoscope main body 2 without any problem. In this way, since the operation unit 11 can have a normal length, it does not affect the operability of the operator who grips the operation unit 11.

Here, since the operation knob 16 and the connecting member are arranged on the opposite side of the guide sheath outlet 22a with respect to the central axis of the operation unit 11 as shown in FIG. 1, the operation wire 61 By designing the extra length of the guide sheath 62 to be longer, it is possible to easily form a loop shape.

Since the tip cover 63 is locked to the tip body 31 by engaging the locking hole 65b and the locking pin 31b, for example, even when a compressive force in the insertion axis direction is applied to the entire length of the guide sheath 62. , It is possible to prevent the tip cover 63 from falling off from the tip body 31.

At this time, as shown in FIG. 15, the second locking hole 69a of the extending portion 69 integrally formed with the base 68 engages with the second locking pin 31d of the tip portion main body 31. By configuring in this way, it is possible to more reliably prevent the tip cover 63 from falling off. Further, since the extending portion 69 is elastically deformable, the mouthpiece 68 can be attached to and detached from the tip portion main body 31.

In this way, since the raising platform device 5 can be completely separated and removed from the endoscope main body 2, it is possible to easily clean the endoscope main body 2 including the insertion pipe line 22 and the treatment tool channel 21. It will be possible.
[Second Embodiment]

24 and 25 show a second embodiment of the present invention, in which FIG. 24 shows a first tip cover 65C and a second tip cover on the tip body 31C of the direct-view endoscope main body 2C. A perspective view showing a state before attaching the 66, FIG. 25 is a perspective view showing a state in which the first tip cover 65C and the second tip cover 66 have been attached to the tip main body 31C of the direct-view endoscope main body 2C. Is.

In this second embodiment, the same parts as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted as appropriate, and only the differences will be mainly described.

The first embodiment described above relates to a side-viewing endoscope, but the present embodiment relates to a direct-viewing endoscope.

That is, in the endoscope main body 2C, an observation window 24b, a pair of illumination windows 25b provided so as to sandwich the observation window 24b, and a nozzle 23b are arranged on the tip surface of the tip main body 31C.

Further, the tip cover 63C in the raising platform device 5C is configured by combining the first tip cover 65C and the second tip cover 66.

The riser 71C provided on the first tip cover 65C is formed with an insertion hole 71Ca for inserting the treatment tool tip portion 9a of the treatment tool 9 in place of the groove 71a. The insertion hole 71Ca is coaxial with the treatment tool channel 21 near the treatment tool channel opening 21b in a state where the raising table 71C is inverted. As a result, the treatment tool tip portion 9a extending from the treatment tool channel opening 21b enters the insertion hole 71Ca and further extends from the tip of the insertion hole 71Ca.

Then, by pulling / relaxing the operation wire 61, the raising table 71C can be raised / inverted as in the first embodiment described above. Further, after removing the second tip cover 66, breaking the fragile portion 65f and removing the first tip cover 65C is the same as in the first embodiment, and other configurations and operations are also in the first embodiment. Follow the form.

Further, also in the second embodiment, various modifications (for example, modifications as described with reference to FIGS. 15 to 22) as described in the first embodiment described above are applied. Can be done.

According to such a second embodiment, even in a direct-view type endoscope, almost the same effect as that of the first embodiment described above can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment as it is, and at the implementation stage, the components can be modified and embodied within a range that does not deviate from the gist thereof. In addition, various aspects of the invention can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment. For example, some components may be removed from all the components shown in the embodiments. In addition, components across different embodiments may be combined as appropriate. As described above, it goes without saying that various modifications and applications are possible within a range that does not deviate from the gist of the invention.

1 ... Endoscope 2,2A, 2B, 2C ... Endoscope body 5,5C ... Rising platform device 5a ... Rising platform control unit 5b ... Rising platform tip side component 9 ... Treatment tool 9a ... Treatment tool tip 11 ... Operation part 11a ... Rising table device mounting part 12 ... Inserting part 13 ... Universal cord 14 ... Angle knob 15 ... Operation button 16 ... Rising table operation knob 16a ... Mounting hole 17 ... Flexible tube part 18 ... Curved part 19 ... Tip part 21 ... Treatment tool channel 21a ... Treatment tool insertion port 21b ... Treatment tool channel opening 22 ... Guide sheath insertion conduit 22a ... Guide sheath outlet (base end side opening)
22b ... Guide sheath insertion port 23 ... Air supply / water supply channel 23b ... Nozzle 24 ... Signal line 24a ... Imaging unit 24b ... Observation window 25 ... Light guide 25b ... Lighting window 26 ... Curved wire 27 ... Curved frame 31, 31C ... Tip Main body 31A ... First tip main body 31B ... Second tip main body 31a ... Recessed groove 31b ... Locking pin 31c, 31c1, 31c2 ... Support bearing 31d ... Second locking pin 51 ... Operation knob mounting part ( Connecting member)
51a, 51b ... Bent part 52 ... Control part main body (connecting member)
52a ... Slide hole 52b ... Mounting hole 52c ... Sheath receiving hole 52d ... Wire insertion hole 52e ... Tapered part 52f ... Male screw 53 ... Operation part mounting part (fixing member)
53a ... Wire fixing part (fixing member)
53b ... Large diameter hole 53c ... Small diameter hole 53d ... Through hole 53e ... Bottom hole 54 ... Locking button 54a ... Button head 54b ... Large diameter shaft 54c ... Small diameter shaft 54d ... Long hole 55 ... Compression spring 56 ... Tightening ring 56e ... Tapered surface 56f ... Female screw 61 ... Rising table operation wire 62 ... Guide sheath 62a ... Coil 62b ... Tube 63, 63C ... Tip cover 64 ... Wire terminal member 64a ... Recessed 65, 65C ... First tip cover 65a ... Convex part 65b ... Locking hole 65c ... Cover opening 65c1 ... Opening edge 65d ... Tip side notch 65e ... Base end side notch 65f ... Weak part 65g ... Slit 65h ... Guide sheath fixing part 66 ... Second tip cover 67 ... Tip terminal member 68 ... Mouthpiece 69 ... Extension portion 69a ... Second locking hole 71, 71A, 71B, 71C ... Treatment tool riser 71Ca ... Insertion hole 71a ... Groove 71b ... Mounting hole 72 ... Support shaft 73 ... Insulation ring 74, 75 ... Metal member 76 ... Reinforcing member 76a ... First hole 76b ... Second hole 100 ... Subject 101 ... Cavity 102 ... Pipe line L1, L2 ... Total length of insertion part R1, R2 ... Loop diameter

Claims (8)

An operation unit equipped with an operation knob and
An insertion section extending from the operation section in the insertion axis direction and having an insertion line,
With the main body of the endoscope,
A tip cover that can be detachably attached to the tip of the insertion part,
A rotatable riser provided on the tip cover and
A guide sheath that is inserted into the insertion pipe and whose tip side is fixed to the tip cover,
An operation wire inserted into the guide sheath and connected to the riser on the tip side,
A fixing member fixed to the operation portion while fixing one of the proximal end side of the guide sheath and the proximal end side of the operation wire.
A connecting member that connects the other of the base end side of the guide sheath and the base end side of the operation wire to the operation knob and moves in the insertion axis direction in response to the operation of the operation knob.
With a riser device that has
Equipped with
An endoscope characterized in that the tip end side of the operation wire connected to the raising table moves in response to the movement of the connecting member, and the raising table rotates. The first aspect of the present invention, wherein the one fixed by the fixing member is the base end side of the operation wire, and the other side connected to the connecting member is the base end side of the guide sheath. Endoscope. The first aspect of claim 1, wherein one fixed by the fixing member is the base end side of the guide sheath, and the other side connected to the connecting member is the base end side of the operation wire. Endoscope. The guide sheath and the operation wire extending from the proximal end side opening of the insertion line have an extra length from the proximal end side opening and are close to the connecting member, and then the other is connected. The endoscope according to claim 1, wherein the endoscope is connected to a member. The endoscope according to claim 4, wherein the guide sheath and the operation wire extending from the proximal end side opening have a loop shape, and then the other is connected to the connecting member. .. The tip portion of the insertion portion includes a tip portion main body and has a tip portion main body.
The guide sheath has a mouthpiece at the tip and has a base.
The endoscope according to claim 1, wherein the mouthpiece is detachably fixed to the tip body. The endoscope according to claim 4, wherein the operation knob and the connecting member are arranged on the opposite side of the base end side opening with the central axis of the operation portion interposed therebetween. .. A riser device attached to an endoscope body having an operation unit provided with an operation knob and an insertion unit extending from the operation unit in the insertion axis direction and having an insertion pipe path.
A tip cover that can be detachably attached to the tip of the insertion part,
A rotatable riser provided on the tip cover and
A guide sheath that is inserted into the insertion pipe and whose tip side is fixed to the tip cover,
An operation wire inserted into the guide sheath and connected to the riser on the tip side,
A fixing member fixed to the operation portion while fixing one of the proximal end side of the guide sheath and the proximal end side of the operation wire.
A connecting member that connects the other of the base end side of the guide sheath and the base end side of the operation wire to the operation knob and moves in the insertion axis direction in response to the operation of the operation knob.
Equipped with
A raising platform device characterized in that the tip end side of the operation wire connected to the raising platform moves in response to the movement of the connecting member, and the raising platform rotates.

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