Treatment tool erection mechanism and ultrasonic endoscope

Abstract

To provide a treatment instrument standing mechanism and an ultrasonic endoscope, capable of suppressing diameter increase of an endoscope, and withstanding loads.SOLUTION: A treatment instrument standing mechanism comprises: a rotary shaft part which is supported rotatably centered on a rotary shaft; a standing table which is coupled to one end of the rotary shaft part so as to rotatable integrated with the rotary shaft part; and a standing lever which is coupled to the other end of the rotary shaft prat so as to be rotatable integrated with the rotary shaft part. Rotary force is applied to the standing lever, rotary force is transmitted to the standing table through the rotary shaft part, and at least one of fitted members on the standing lever and the standing table has a fitting recess which is open in the direction of the rotary shaft part, and the rotary shaft part has a fitting salient fitted to the fitting recess so as not to relatively rotate. The fitting salient has a centroid at a position decentered from the rotary shaft on a cross section vertical to the rotary shaft.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a treatment tool erecting mechanism and an ultrasonic endoscope. [Background technology]

[0002] Conventionally, there is known an endoscope that is equipped with a stand at the tip of an insertion section that is inserted into a body cavity, and the stand allows a treatment tool to be inserted through a treatment tool insertion channel and output from the treatment tool output section at the tip to be erected, and the angle at which the stand is erected can be changed to adjust the output direction of the treatment tool.

[0003] For example, the following Patent Document 1 describes an ultrasonic endoscope in which a stand is provided in a treatment tool outlet section, a stand lever is connected via a rotating shaft of the stand, and the stand is displaced by pushing and pulling an operating wire connected to the stand lever by operating the operating section. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-287593 A Summary of the Invention [Problem to be solved by the invention]

[0005] The standing lever and the standing base are connected, for example, by fitting a fitting shaft of a rotating shaft portion provided on one of the standing lever or the standing base into a fitting hole provided on the other of the standing lever or the standing base.

[0006] However, in recent years, as the treatment tools used have become more multifunctional and larger in diameter, the load applied to the fitting shaft and fitting hole when the stand is moved increases. In order to improve the load resistance, it is possible to enlarge the fitting shaft, but there is a concern that the diameter of the endoscope will increase by making the fitting shaft larger, which will increase the burden on the patient.

[0007] The present invention has been made in consideration of the above circumstances, and has an object to provide a treatment tool erecting mechanism and an ultrasonic endoscope that can prevent the diameter of the endoscope from becoming thicker and improve the load resistance. [Means for solving the problem]

[0008] The treatment tool standing mechanism of the first embodiment comprises a rotating shaft portion supported rotatably around a rotating shaft, a standing base connected to one end of the rotating shaft portion so as to be rotatable integrally with the rotating shaft portion, and a standing lever connected to the other end of the rotating shaft portion so as to be rotatable integrally with the rotating shaft portion, in which a rotational force is applied to the standing lever and transmitted to the standing base via the rotating shaft portion, and at least one of the mated members of the standing lever and the standing base has an engaging recess that opens toward the rotating shaft portion, the rotating shaft portion has an engaging convex portion that engages with the engaging recess so as not to rotate relative to the rotating shaft, and the engaging convex portion has a center of gravity at a position eccentric to the rotation axis in a cross section perpendicular to the rotation axis.

[0009] In the treatment tool erecting mechanism of the second aspect, the fitted member is a standing base.

[0010] In the third aspect of the treatment tool standing mechanism, the standing base has a treatment tool support portion extending from the rotation axis in a direction perpendicular to the rotation axis, and the fitting convex portion has a center of gravity at a position eccentric from the rotation axis in the extension direction of the treatment tool support portion in a cross section perpendicular to the rotation axis.

[0011] In the treatment tool erecting mechanism of the fourth aspect, the fitted member is a erecting lever.

[0012] In the treatment tool standing mechanism of the fifth aspect, the standing lever has a lever portion extending from the rotation axis in a direction perpendicular to the rotation axis, and the fitting convex portion has a center of gravity at a position eccentric from the rotation axis in the extension direction of the lever portion in a cross section perpendicular to the rotation axis.

[0013] In the treatment tool standing mechanism of the sixth aspect, the engaged members are a standing base and a standing lever, the engaging recess has a first engaging recess provided on the standing base and opening toward the rotating shaft portion, and a second engaging recess provided on the standing lever and opening toward the rotating shaft portion, the engaging protrusion has a first engaging protrusion provided on one end of the rotating shaft portion and engaging with the first engaging recess so as to be non-rotatable relative to the first engaging recess, and a second engaging protrusion provided on the other end of the rotating shaft portion and engaging with the second engaging recess so as to be non-rotatable relative to the second engaging recess, and the first engaging protrusion and the second engaging protrusion have centers of gravity eccentric to the rotation shaft in a cross section perpendicular to the rotation shaft.

[0014] In the treatment tool standing mechanism of the seventh aspect, the standing base has a treatment tool support portion extending from the rotation axis in a direction perpendicular to the rotation axis, the standing lever has a lever portion extending from the rotation axis in a direction perpendicular to the rotation axis, the first mating convex portion has its center of gravity at a position eccentric from the rotation axis in the extension direction of the treatment tool support portion in a cross section perpendicular to the rotation axis, and the second mating convex portion has its center of gravity at a position eccentric from the rotation axis in the extension direction of the lever portion in a cross section perpendicular to the rotation axis.

[0015] In the treatment tool erecting mechanism of the eighth aspect, a seal portion is provided between the erecting base and the erecting lever.

[0016] The treatment tool raising mechanism of the ninth aspect includes a holding portion having a holding hole that rotatably holds the rotating shaft portion, and the seal portion is disposed between the outer peripheral surface of the rotating shaft portion and the inner peripheral surface of the holding hole.

[0017] In the treatment tool erecting mechanism of the tenth aspect, when the fitting convex portion and the rotating shaft portion are projected onto a plane perpendicular to the rotating shaft, the fitting convex portion is included in the formation area of ​​the rotating shaft portion.

[0018] In the treatment tool erecting mechanism of the eleventh aspect, the fitting recess has a closed shape in a cross section perpendicular to the rotation axis.

[0019] An ultrasonic endoscope according to a twelfth aspect includes any one of the treatment tool erecting mechanisms described above. Effect of the Invention

[0020] According to the present invention, it is possible to provide a treatment tool erecting mechanism and an ultrasonic endoscope that can prevent the diameter of the endoscope from becoming thicker and improve the load resistance. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram showing an example of the configuration of an ultrasonic inspection system. [Diagram 2] FIG. 2 is an external perspective view of the tip of the insertion portion. [Diagram 3] FIG. 3 is a top view of the tip of the insertion section. [Figure 4] FIG. 4 is an exploded perspective view of a stand assembly including a first embodiment of the treatment tool standing mechanism. [Diagram 5] FIG. 5 is a left perspective view of the entire platform assembly. [Figure 6] FIG. 6 is a right-side perspective view of the entire platform assembly. [Figure 7] FIG. 7 is a diagram showing the standing lever, the standing base, and the rotating shaft portion, viewed in a direction parallel to the rotating shaft and from the left side. [Figure 8] FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. [Figure 9] FIG. 9 is an exploded perspective view of a treatment tool erecting mechanism according to a second embodiment. [Figure 10] FIG. 10 is an exploded perspective view of a treatment tool erecting mechanism according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, preferred embodiments of a treatment tool erecting mechanism according to an embodiment and an ultrasonic endoscope including the treatment tool erecting mechanism will be described with reference to the attached drawings.

[0023] FIG. 1 is a diagram showing the overall configuration of an ultrasonic inspection system 1. As shown in FIG.

[0024] The ultrasound inspection system 1 comprises an ultrasound endoscope 2 that captures endoscopic images and ultrasound images of the inside of the body, an ultrasound processor unit 3 that generates ultrasound images, an endoscope processor unit 4 that generates endoscopic images, a light source device 5 that supplies illumination light to the ultrasound endoscope 2 to illuminate the inside of the body, and a monitor 6 that displays the endoscopic images and ultrasound images.

[0025] The ultrasonic endoscope 2 is a convex type ultrasonic endoscope having a tip and a base end, and is composed of an insertion section 10 to be inserted into the body, an operation section 11 connected to the base end of the insertion section 10, and a universal cord 14 having a base end connected to the operation section 11. The tip of the universal cord 14 is provided with connectors 14A, 14B, and 14C for connecting the ultrasonic endoscope 2 to the ultrasonic processor unit 3, the endoscope processor unit 4, and the light source device 5, respectively. The ultrasonic inspection system 1 further includes a water supply tank 17A for storing cleaning water and the like, and a suction pump 17B for sucking up the aspirated material (including the supplied cleaning water and the like) in the body cavity.

[0026] The insertion section 10 is composed of a flexible section 15, a bending section 16, and a tip section 20, which are successively provided from the base end to the tip.

[0027] The flexible section 15 is flexible and can be bent in any direction along the insertion path of the insertion section 10. The bending section 16 can be bent in any direction, up and down and left and right, by operating the angle knob 21 of the operation section 11.

[0028] The tip portion 20 is provided with an ultrasonic observation section 100 that transmits and receives ultrasonic waves to its tip, converts the received ultrasonic waves into ultrasonic signals, which are electrical signals, and outputs them. The ultrasonic signals output by the ultrasonic observation section 100 are sent to an ultrasonic processor unit 3 connected by a universal cord 14, and in the ultrasonic processor unit 3, a tomographic image of the cellular tissue present in the depth direction of the body wall portion irradiated with ultrasonic waves is generated as an ultrasonic image.

[0029] The tip portion 20 also includes an endoscopic observation section 38 that captures an image of an internal body site to be observed, on the proximal side of the ultrasonic observation section 100. The image captured by the endoscopic observation section 38 is sent as an observed image (endoscopic image) to the endoscope processor unit 4 connected by the universal cord 14, and the illumination light emitted by the illumination section is propagated from the light source device 5 connected by the universal cord 14 through a light guide inside the ultrasonic endoscope 2.

[0030] Furthermore, the distal end portion 20 includes a treatment tool outlet portion 41 on the proximal side of the ultrasonic observation portion 100. The treatment tool outlet portion 41 outlets the treatment tool 150 inserted from the treatment tool introduction port 25 of the operation portion 11 into the treatment tool insertion channel inside the insertion portion 10 to the outside of the insertion portion 10. The treatment tool outlet portion 41 is provided with a stand 50 (described later) that adjusts the outlet direction of the treatment tool 150.

[0031] Next, a description will be given of the configuration of the tip portion 20. Figures 2 and 3 are a perspective view and a plan view (top view) showing the external appearance of the tip portion 20.

[0032] The tip portion 20 includes an exterior case 30 (also called a housing) that corresponds to a tip portion main body. The exterior case 30 houses an ultrasonic observation unit 100 and an endoscopic observation unit 38, which will be described later, and a stand assembly 49.

[0033] The portion of the exterior case 30 that is closer to the base end than the ultrasound observation unit 100 is divided into two in the vertical direction in the figure. Therefore, the exterior case 30 is composed of an exterior case main body 30A located on the lower side in the figure and an exterior case lid 30B located on the upper side in the figure.

[0034] A lever accommodating lid 59 is provided on the R-direction side of the outer case main body 30A and the outer case lid 30B at a position facing the lever accommodating section 56 (see Figure 6) described below, so as to straddle the outer case main body 30A and the outer case lid 30B.

[0035] Here, when viewed from a direction parallel to the longitudinal axis LA of the insertion section 10 in a direction from the base end side to the tip end side of the insertion section 10, the direction in which the ultrasound observation section 100 and the treatment tool outlet section 41 are arranged is defined as up, and the opposite direction is defined as down, and the terms up (U), down (D), left (L), and right (R) are used to refer to the directions.

[0036] Although details are omitted, a part of the exterior case 30 can be removed as a separate block, and each component can be assembled into a predetermined housing part with the separate block removed. After assembling each component into the housing part, the separate block is attached to the exterior case 30 (for example, the exterior case main body 30A, the exterior case lid 30B, etc.), whereby each component is housed and held in the housing part and fixed to the tip portion 20.

[0037] The exterior case 30 is formed from an insulating material having insulating properties, for example, a resin material such as a plastic, such as methacrylic resin or polycarbonate.

[0038] As shown in Figs. 2 and 3, the distal end portion 20 is composed of a base portion 32 on the proximal end side and an extension portion 33 extending from the base portion 32 to the distal end side.

[0039] An endoscopic observation unit 38 is provided on the base 32. The above-mentioned ultrasonic observation unit 100 is provided on the upper surface side of the extension 33. The ultrasonic observation unit 100 has a convex type ultrasonic transducer 102 in which a large number of ultrasonic vibrators that transmit and receive ultrasonic waves are arranged in a convex shape.

[0040] The endoscopic observation section 38 has a first inclined surface 40A on the left side and a second inclined surface 40B on the right side facing diagonally upward toward the tip side, and a concave treatment tool outlet section 41 provided in the central portion between the first inclined surface 40A and the second inclined surface 40B.

[0041] The first inclined surface 40A is provided with an observation window 42, a first illumination window 43A, and an air / water supply nozzle 44. The second inclined surface 40B is provided with a second illumination window 43B.

[0042] The observation window 42 is for obtaining an optical image of a subject, and an image of the observed part is obtained as an observation image. An imaging system unit is housed and arranged inside the base 32 on the rear side of the observation window 42, in which an imaging optical system and a solid-state imaging element (a CCD (Charge Coupled Device) type or CMOS (Complementary Metal Oxide Semiconductor) type solid-state imaging element) which are components of the optical observation section are integrally assembled. The imaging system unit is electrically connected to the endoscope processor unit 4 which is connected to the universal cord 14.

[0043] The first illumination window 43A and the second illumination window 43B irradiate illumination light to the observation site. A light emitting unit, which is a component of the illumination unit and emits illumination light via the first illumination window 43A and the second illumination window 43B, is accommodated and disposed inside the base 32 on the rear side of each of the first illumination window 43A and the second illumination window 43B. The light emitting unit is optically connected to the light source device 5, which is connected to the universal cord 14, via a light guide.

[0044] The air and water nozzle 44 sprays water or air toward the observation window 42 by operating the air and water button 22 (see FIG. 1) of the operation unit 11, thereby cleaning the observation window 42 and the like.

[0045] The treatment tool outlet section 41 has a stand-up table 50 disposed therein, and a stand-up table storage space 45 having an opening 45A on the side (upper side) of the outer case 30 as a slit-shaped space in which the stand-up table 50 is disposed, and a treatment tool insertion hole 55A is provided on the base end side thereof.

[0046] The treatment tool insertion hole 55A communicates with the treatment tool introduction port 25 (see FIG. 1) of the operation section 11 through a treatment tool insertion channel (pipe) that passes through the inside of the insertion section 10. Therefore, the treatment tool inserted from the treatment tool introduction port 25 is guided from the treatment tool insertion hole 55A to the stand housing space 45. Then, the lead-out direction (lead-out angle) is bent by the stand 50 of the stand housing space 45, and the treatment tool is led out from the treatment tool lead-out section 41 toward the side (upper side) of the insertion section 10.

[0047] The treatment tool insertion channel is also connected to a suction channel, and by operating a suction button 23 (see FIG. 1) of the operation section 11, bodily fluids and the like are suctioned from the treatment tool insertion hole 55A.

[0048] The stand 50 is provided rotatably about an axial rotation axis including a component perpendicular to the longitudinal axis LA of the insertion section 10, and has a treatment tool support section 50A which serves as a treatment tool guiding surface for guiding a treatment tool led out from the treatment tool insertion channel. The treatment tool support section 50A is formed on the upper surface side of the stand 50 in a concave shape (arc shape) curving upward from the base end side to the tip end side of the tip section 20.

[0049] The treatment tool introduced from the treatment tool insertion hole 55A into the stand storage space 45 curves upward along the treatment tool support portion 50A in the axial direction of the tip portion 20 (the longitudinal axis LA direction of the insertion portion 10) and is introduced to the outside from the upper opening 45A of the stand storage space 45, which serves as a treatment tool introduction port.

[0050] In addition, the standing table 50 is configured to be raised and lowered by operating the standing operation lever 24 (see Figure 1) of the operating unit 11, and by raising and lowering the standing table 50 to adjust the standing angle from the laid-down state, the outlet direction (outlet angle) of the treatment tool output from the treatment tool output section 41 can be adjusted.

[0051] First Embodiment Next, a first embodiment of the treatment tool standing mechanism will be described. Fig. 4 is an exploded perspective view of the stand assembly 49, Fig. 5 is a perspective view of the stand assembly 49 seen from the left side, and Fig. 6 is a perspective view of the whole stand assembly 49 seen from the right side.

[0052] The stand assembly 49 is assembled as a single unit as shown in FIGS. 4 to 6, and is housed and held in a predetermined housing portion of the exterior case 30 and fixed within the tip portion 20.

[0053] 4, the stand assembly 49 includes an assembly body 51 that defines the stand accommodation space 45 and supports components, and a treatment tool stand mechanism 70. The treatment tool stand mechanism 70 includes a rotation shaft portion 80 that is rotatably supported, a stand 50 connected to one end of the rotation shaft portion 80, and a stand lever 52 connected to the other end of the rotation shaft portion 80. In the treatment tool stand mechanism 70, when a rotation force is applied to the stand lever 52, the rotation force is transmitted to the stand 50 via the rotation shaft portion 80, as described later. In the first embodiment, the stand 50 constitutes a fitted member having a fitting recess 61.

[0054] The assembly body 51 is composed of a base part 53 forming the lower part of the assembly body 51, a partition part 54 arranged on the right side of the base part 53, and a treatment tool insertion part 55 forming the base end part. The base part 53 and the partition part 54 form a partition between the standing base 50 and the standing lever 52. These components are integrally formed, but may be formed as separate bodies and connected to each other.

[0055] The base portion 53 is positioned below the stand-up platform accommodating space 45, based on the area of ​​the stand-up platform accommodating space 45 when the stand-up platform assembly 49 is accommodated within the tip portion 20 (a designated accommodation portion of the outer case 30) as shown in Figures 2 and 3.

[0056] A recess 53B is formed in an area along the left side surface of the base portion 53. The recess 53B can accommodate the stand 50 in a rotatable manner.

[0057] A partition portion 54 extends upward along the right edge of the upper surface 53A of the base portion 53, and the right wall surface of the stand accommodation space 45 is formed by a left side surface 54A of the partition portion 54.

[0058] A treatment tool insertion portion 55 is provided adjacent to the base end side of the base portion 53 and the partition portion 54 , and the treatment tool insertion portion 55 is disposed on the base end side of the stand accommodating space 45 .

[0059] The treatment tool insertion portion 55 has a treatment tool insertion hole 55A that opens toward the stand accommodation space 45. A duct member 110 that forms a treatment tool insertion channel is connected to the proximal end side of the treatment tool insertion portion 55, and the treatment tool insertion hole 55A communicates with the treatment tool insertion channel.

[0060] A lever accommodating portion 56 is provided in an area along the right side surface of the base portion 53 and the partition portion 54 (see FIG. 6). A cylindrical retaining hole 57 is provided in the base portion 53, penetrating the lever accommodating portion 56 and the recessed portion 53B of the base portion 53. The base portion 53 functions as a retaining portion having the retaining hole 57 that rotatably holds the rotating shaft portion 80.

[0061] The rotating shaft portion 80 has a cylindrical shape having one end and the other end. The stand-up platform 50 is connected to one end of the rotating shaft portion 80 so as to be rotatable integrally with the rotating shaft portion 80, and the stand-up lever 52 is connected to the other end of the rotating shaft portion 80 so as to be rotatable integrally with the rotating shaft portion 80.

[0062] The rotating shaft portion 80 has a fitting protrusion 81 that fits into a fitting recess 61 of the stand 50, which will be described later, so as to be unable to rotate relative to the stand 50. The fitting protrusion 81 protrudes parallel to the rotation axis AR of the rotating shaft portion 80. The rotating shaft portion 80 has an accommodation groove 82 that extends along the circumferential direction on its outer circumferential surface. A seal portion 90 (see FIG. 8), which will be described later, is disposed in the accommodation groove 82.

[0063] The rotating shaft portion 80 has a circular shape in a cross section perpendicular to the rotation axis AR. On the other hand, the fitting protrusion 81 has a non-circular shape in a cross section perpendicular to the rotation axis AR, and as an example, has a substantially rectangular shape in FIG.

[0064] The above-mentioned holding hole 57 of the base part 53 holds the rotating shaft part 80 rotatably about the rotation axis AR. The outer diameter of the rotating shaft part 80 (excluding the accommodating groove 82) and the inner diameter of the holding hole 57 are approximately the same.

[0065] The standing lever 52 is formed in a long plate shape. The standing lever 52 is connected to the other end of the rotating shaft 80 so as to be rotatable integrally with the rotating shaft 80. The rotating shaft 80 is connected to one end (base end) of the standing lever 52 in the longitudinal direction, and the rotating shaft 80 is connected to the wide surface 52A of the standing lever 52 facing the partition 54 so as to be substantially perpendicular to the wide surface 52A. The standing lever 52 and the rotating shaft 80 may be connected by integral molding, or may be connected by forming the standing lever 52 and the rotating shaft 80 as separate members and fixing them with adhesive, screws, or the like. The standing lever 52 includes a lever portion 58 extending from the rotating axis AR in a direction perpendicular to the rotating axis AR. The lever portion 58 is provided with a wire connecting portion 116 described later.

[0066] The stand 50 has a symmetrical stand body 60 with an arc-shaped treatment tool support part 50A, and a fitting recess 61 that opens toward the rotation shaft part 80 formed on the opposite side of the stand body 60 from the treatment tool support part 50A. The fitting recess 61 has a non-circular rectangular shape that is the same as the fitting protrusion 81 when viewed from a direction parallel to the rotation axis AR. In FIG. 4, the fitting recess 61 penetrates the stand body 60 when viewed from a direction parallel to the rotation axis AR. On the other hand, the fitting recess 61 has a closed shape in a cross section perpendicular to the rotation axis AR. Therefore, in the closed shape, the entire circumference of the fitting recess 61 is surrounded by the stand body 60, and does not have a cutout part such as a C-shape or U-shape.

[0067] As shown in Fig. 5, the stand assembly 49 is assembled as a single unit. During assembly, the rotating shaft 80 provided on the standing lever 52 is inserted into the retaining hole 57 from the lever housing portion 56 side (see Fig. 6) toward the recess 53B. The rotating shaft 80 is rotatably supported in the retaining hole 57. Only the fitting protrusion 81 of the rotating shaft 80 protrudes from the retaining hole 57 into the recess 53B (see Fig. 8).

[0068] The standing base 50 is placed from the recess 53B side, and the mating protrusion 81 of the rotating shaft 80 is mated with the mating recess 61 of the standing base 50 so as not to rotate relative to one another. By mating the mating protrusion 81 with the mating recess 61, the standing base 50 is connected to one end of the rotating shaft 80 so as to be rotatable integrally with the rotating shaft 80. When the rotating shaft 80 is inserted into the retaining hole 57 and the mating protrusion 81 of the rotating shaft 80 is mated with the mating recess 61 of the standing base 50, the rotating shaft 80 is positioned within the retaining hole 57.

[0069] Before the rotating shaft portion 80 is inserted into the holding hole 57, a seal portion 90 such as an O-ring is placed on the outer circumferential surface of the receiving groove 82 (see FIG. 8).

[0070] As shown in FIG. 6, the lever housing portion 56 is provided in an area along the right side surface of the base portion 53 and the partition portion 54, and the standing lever 52 is housed therein so as to be rotatable integrally with the rotating shaft portion 80.

[0071] A control cable 112 is connected to the proximal end side of the lever housing portion 56 at the proximal end portion of the treatment tool insertion portion 55 of the assembly body 51. The control cable 112 is composed of a guide tube 114 and an operation wire 113 that passes through the guide tube 114.

[0072] One end (base end) of the operation wire 113 is connected to the standing operation lever 24 of the operation unit 11, and is pushed or pulled by operating the standing operation lever 24. The other end (tip) of the operation wire 113 is inserted into the lever housing part 56 and connected to the lever part 58 of the standing lever 52 via the wire connecting part 116.

[0073] In addition, in FIG. 6, the lever housing cover 59 that covers the lever housing portion 56 in which the standing lever 52 is housed is omitted.

[0074] According to the treatment tool erecting mechanism 70, when the operation wire 113 is pushed or pulled by operating the erecting operation lever 24, a rotational force is applied to the erecting lever 52, and the erecting lever 52 and the rotating shaft part 80 rotate integrally about the rotation axis AR. The rotational force is transmitted to the erecting table 50 via the rotating shaft part 80. The erecting table 50 rotates integrally with the rotating shaft part 80, and the erecting table 50 performs a raising and lowering operation.

[0075] The operation wire 113 is provided from the operation unit 11 to the exterior case 30 via the insertion unit 10, and is one form of a transmission member that transmits the amount of displacement generated in the standing operation lever 24 to the standing lever 52. However, other forms of transmission members may be used as long as they transmit the amount of displacement to the standing lever 52.

[0076] FIG. 7 is a diagram showing the standing lever 52, the standing platform 50, and the rotating shaft portion 80, viewed from the left side in a direction parallel to the rotating axis AR.

[0077] 7(A) shows the state before the fitting recess 61 and the fitting protrusion 81 are fitted together. The rotating shaft 80 extends parallel to the rotation axis AR (perpendicular to the paper surface) from the standing lever 52. The rotating shaft 80 has a cylindrical shape and is circular in a cross section perpendicular to the rotation axis AR, and the rotation axis AR coincides with the center of the circular cross section of the rotating shaft 80.

[0078] The fitting protrusion 81 has a substantially rectangular shape in a cross section perpendicular to the rotation axis AR. The lengths of the two opposing sides are equal, and the lengths of the two adjacent sides are different. As shown in Fig. 7(A), the intersection of two imaginary lines connecting the centers of the two opposing sides of the fitting protrusion 81 is the center of gravity G of the fitting protrusion 81. As shown in Fig. 7(A), the fitting protrusion 81 has the center of gravity G at a position eccentric to the rotation axis AR in a cross section perpendicular to the rotation axis AR.

[0079] As shown in FIG. 7(A), the stand 50 has the stand main body 60 on which the treatment tool support portion 50A is formed, and a fitting recess 61 that opens toward the rotation shaft portion 80, as described above.

[0080] As shown in Fig. 7(B), the fitting protrusion 81 is fitted into the fitting recess 61 so as not to rotate relative to the lift lever 52, the rotating shaft 80, and the lift base 50 are integrally connected to each other to assemble the treatment tool lift mechanism 70. As described above, the lift operation lever 24 is operated to push and pull the operation wire 113, so that a rotational force is applied to the lift lever 52 in the direction shown by the arrow, and the rotating shaft 80 rotates about the rotation axis AR. The rotational force is transmitted to the lift base 50 via the rotating shaft 80. Since the fitting protrusion 81 and the fitting recess 61 are fitted into each other so as not to rotate relative to each other, the lift base 50 is displaced (standing up and lying down) in conjunction with the rotational direction of the lift lever 52.

[0081] When a rotational force is transmitted to the stand 50 via the rotating shaft 80, a load is applied to the mating protrusion 81 and mating recess 61, which are mated so as not to rotate relative to each other. As the treatment tools used have become more multifunctional and have larger diameters, the load applied to the mating protrusion 81 and mating recess 61 has become greater.

[0082] Conventionally, when the center of gravity of the fitting protrusion coincides with the rotation axis, there is a concern that the diameter of the endoscope will increase if the fitting protrusion is enlarged in order to improve the load resistance.

[0083] In the embodiment, by decentering the center of gravity G of the fitting convex portion 81 from the rotation axis AR in a cross section perpendicular to the rotation axis AR, the fitting convex portion 81 can be enlarged in the direction perpendicular to the rotation axis AR without increasing the diameter of the endoscope, thereby improving the load resistance.

[0084] As shown in Fig. 7(B), the treatment tool support part 50A of the stand 50 extends from the rotation axis AR in a direction perpendicular to the rotation axis AR. It is preferable that the fitting protrusion 81 has a center of gravity G at a position eccentric from the rotation axis in the extension direction of the treatment tool support part 50A in a cross section perpendicular to the rotation axis AR. Even if the center of gravity G is eccentric in the extension direction of the treatment tool support part 50A, the thickness (in the direction perpendicular to the rotation axis AR) around the fitting recess 61 that fits with the fitting protrusion 81 can be secured, and a decrease in load resistance can be suppressed.

[0085] Since the mating convex portion 81 has a rectangular shape with two adjacent sides of different lengths, it is less likely to slip between the mating convex portion 81 and the mating recess 61, and the rotational force of the standing lever 52 can be reliably transmitted to the standing platform 50 via the mating convex portion 81 and the mating recess 61 of the rotating shaft portion 80.

[0086] Although the fitting protrusion 81 has been shown to have a rectangular shape as an example, the shape is not limited as long as it can be fitted into the fitting recess 61 so as not to rotate relative to the fitting recess 61 and the center of gravity of the fitting protrusion 81 can be offset from the rotation axis AR. For example, a gear shape having irregularities on the periphery or a polygonal shape may be used.

[0087] As described above, the fitting recess 61 has a closed shape in a cross section perpendicular to the rotation axis AR, so that deformation is suppressed even when a load is applied to the fitting recess 61.

[0088] Fig. 8 is a cross-sectional view taken along line 8-8 in Fig. 3. As shown in Fig. 8, the standing lever 52 and the rotating shaft portion 80 have a substantially L-shape in a cross section perpendicular to the longitudinal axis LA.

[0089] The rotating shaft portion 80 is supported in the retaining hole 57 so as to be rotatable around the rotation axis AR. A ring-shaped sealing portion 90 is disposed between the standing lever 52 and the standing base 50, and in a housing groove 82 that constitutes the outer circumferential surface of the rotating shaft portion 80. Since the rotating shaft portion 80 is supported by the retaining hole 57, the sealing portion 90 is disposed between the outer circumferential surface of the rotating shaft portion 80 (housing groove 82) and the inner circumferential surface of the retaining hole 57.

[0090] Even if liquid such as blood or water (hereinafter simply referred to as liquid) enters between the retaining hole 57 and the rotating shaft portion 80 from within the standing platform accommodating space 45, the sealing portion 90 prevents the liquid from entering the lever accommodating portion 56, thereby preventing contamination of the operating wire 113, which is difficult to clean.

[0091] As described above, fitting protrusion 81 has center of gravity G at a position eccentric to rotation axis AR of rotating shaft portion 80, so that the load resistance can be improved without increasing the diameter.

[0092] 7 and 8, when the fitting protrusion 81 and the rotating shaft portion 80 are projected onto a plane perpendicular to the rotation axis AR, it is preferable that the fitting protrusion 81 is included in the formation area of ​​the rotating shaft portion 80. Since the fitting protrusion 81 does not affect the insertion or removal of the rotating shaft portion 80 into the retaining hole 57, assembly and repairs are facilitated.

[0093] <Second embodiment> Next, a second embodiment of the treatment tool erecting mechanism will be described with reference to the drawings. Configurations similar to those of the first embodiment of the treatment tool erecting mechanism will be given the same reference numerals, and descriptions thereof may be omitted.

[0094] Fig. 9 is an exploded perspective view of a second embodiment of the treatment tool standing mechanism. As shown in Fig. 9, the treatment tool standing mechanism 70A of the second embodiment includes a rotatably supported rotating shaft portion 80, a standing base 50 connected to one end of the rotating shaft portion 80, and a standing lever 52 connected to the other end of the rotating shaft portion 80, similar to the treatment tool standing mechanism 70. The second embodiment differs from the first embodiment in that the standing lever 52 constitutes a fitted member having a fitting recess 71.

[0095] The rotating shaft portion 80 has a fitting protrusion 81 that fits into the fitting recess 71 of the standing lever 52 so as not to rotate relative to the standing lever 52. The fitting protrusion 81 protrudes parallel to the rotation axis AR of the rotating shaft portion 80. The rotating shaft portion 80 has an accommodation groove 82 that extends along the circumferential direction on its outer circumferential surface. The above-mentioned seal portion 90 is disposed in the accommodation groove 82.

[0096] The rotating shaft portion 80 has a circular shape in a cross section perpendicular to the rotation axis AR. On the other hand, the fitting protrusion 81 has a non-circular shape in a cross section perpendicular to the rotation axis AR. The holding hole 57 holds the rotating shaft portion 80 rotatably about the rotation axis AR.

[0097] As in the first embodiment, the fitting protrusion 81 has a center of gravity G at a position eccentric to the rotation axis AR in a cross section perpendicular to the rotation axis AR.

[0098] By decentering the center of gravity G of the fitting protrusion 81 from the rotation axis AR in a cross section perpendicular to the rotation axis AR, the fitting protrusion 81 can be enlarged in the direction perpendicular to the rotation axis AR without increasing the diameter of the endoscope.

[0099] The standing lever 52 is formed in a long plate shape, has a fitting recess 71 that opens toward the rotating shaft portion 80 at one end side (base end side) in the longitudinal direction, and includes a lever portion 58 extending from the rotating shaft AR in a direction perpendicular to the rotating shaft AR. The fitting recess 71 has a non-circular rectangular shape that is the same as the fitting protrusion 81 when viewed in a direction parallel to the rotating shaft AR. The fitting recess 71 penetrates the standing lever 52. On the other hand, the fitting recess 71 has a closed shape in a cross section perpendicular to the rotating shaft AR. Therefore, in the closed shape, the fitting recess 71 is entirely surrounded by the standing lever 52, and does not have a cutout portion such as a C-shape or U-shape.

[0100] The stand 50 includes a stand body 60 having a symmetrical shape with an arc-shaped treatment tool support part 50A. On the opposite side of the stand body 60 from the treatment tool support part 50A, one end of the rotating shaft part 80 is connected to the stand 50 so as to be rotatable integrally. The stand 50 and the rotating shaft part 80 may be connected by integral molding, or the stand 50 and the rotating shaft part 80 may be separate members and connected by fixing them with adhesive, screws, or the like. The stand 50 and the rotating shaft part 80 have a substantially L-shape in a cross section perpendicular to the longitudinal axis LA (not shown).

[0101] When the mating convex portion 81 is mated with the mating concave portion 71 so that it cannot rotate relative to the rotating shaft portion 80, the standing lever 52 is connected to the other end of the rotating shaft portion 80 so that it can rotate integrally with the rotating shaft portion 80, and the treatment tool standing mechanism 70 is assembled in which the standing lever 52, the rotating shaft portion 80, and the standing base 50 are connected so that they can rotate integrally.

[0102] In the second embodiment, it is preferable that the fitting protrusion 81 has a center of gravity at a position eccentric from the rotation axis AR in the extension direction of the lever portion 58 in a cross section perpendicular to the rotation axis AR. Even if the center of gravity G is eccentric in the extension direction of the lever portion 58, the wall thickness (in the direction perpendicular to the rotation axis AR) around the fitting recess 71 that fits with the fitting protrusion 81 can be ensured, and a decrease in load resistance can be suppressed.

[0103] <Third embodiment> Next, a third embodiment of the treatment tool erecting mechanism will be described with reference to the drawings. Configurations similar to those of the first and second embodiments of the treatment tool erecting mechanism will be given the same reference numerals and descriptions thereof will be omitted in some cases.

[0104] Fig. 10 is an exploded perspective view of a third embodiment of the treatment tool standing mechanism. As shown in Fig. 10, the treatment tool standing mechanism 70B of the third embodiment includes a rotatably supported rotating shaft portion 80, a standing base 50 connected to one end of the rotating shaft portion 80, and a standing lever 52 connected to the other end of the rotating shaft portion 80, similar to the treatment tool standing mechanisms 70 and 70A. The third embodiment differs from the first and second embodiments in that it includes a first fitting recess 61A in which the standing base 50 opens toward the rotating shaft portion 80 as a fitting recess, and a second fitting recess 71A in which the standing lever 52 opens toward the rotating shaft portion 80. Furthermore, as fitting protrusions, there are a first fitting protrusion 81A provided at one end of the rotating shaft portion 80 and fitted into the first fitting recess 61A so as to be non-rotatable relative to the first fitting recess 61A, and a second fitting protrusion 81B provided at the other end of the rotating shaft portion 80 and fitted into the second fitting recess 71A so as to be non-rotatable relative to the first fitting recess 61A. The retaining hole 57 (not shown) retains the rotating shaft portion 80 rotatably about the rotation axis AR.

[0105] The rotating shaft portion 80 has a first fitting protrusion 81A provided at one end and a second fitting protrusion 81B provided at the other end. The first fitting protrusion 81A and the second fitting protrusion 81B protrude parallel to the rotation axis AR of the rotating shaft portion 80. The rotating shaft portion 80 has an accommodation groove 82 that extends along the circumferential direction on its outer circumferential surface. The above-mentioned seal portion 90 is disposed in the accommodation groove 82.

[0106] The rotating shaft portion 80 has a circular shape in a cross section perpendicular to the rotation axis AR. On the other hand, the first fitting protrusion 81A and the second fitting protrusion 81B have a non-circular shape in a cross section perpendicular to the rotation axis AR.

[0107] The standing lever 52 is formed in a long plate shape, and has a second fitting recess 71A that opens toward the rotation shaft 80 at one end side (base end side) in the longitudinal direction, and includes a lever portion 58 extending from the rotation axis AR in a direction perpendicular to the rotation axis AR. The second fitting recess 71A penetrates the standing lever 52. Meanwhile, the second fitting recess 71A has a closed shape in a cross section perpendicular to the rotation axis AR.

[0108] The riser 50 includes a riser body 60 having a symmetric shape with an arc-shaped treatment tool support part 50A. On the opposite side of the riser body 60 from the treatment tool support part 50A, the riser body 60 has a first fitting recess 61A that opens toward the rotation shaft part 80. The first fitting recess 61A penetrates the riser 50. Meanwhile, the first fitting recess 61A has a closed shape in a cross section perpendicular to the rotation axis AR.

[0109] When the first mating convex portion 81A is mated with the first mating recess 61A so as to be non-rotatable relative to the first mating recess 61A and the second mating convex portion 81B is mated with the second mating recess 71A so as to be non-rotatable relative to the first mating recess 61A, the stand-up table 50 is connected to one end of the rotating shaft portion 80 so as to be rotatable integrally with the rotating shaft portion 80, and the stand-up lever 52 is connected to the other end of the rotating shaft portion 80 so as to be rotatable integrally with the rotating shaft portion 80, thereby assembling the treatment tool stand-up mechanism 70B in which the stand-up lever 52, the rotating shaft portion 80, and the stand-up table 50 are connected so as to be rotatable integrally.

[0110] The enlarged view shows the first fitting convex portion 81A viewed in a direction parallel to the rotation axis AR from the side of the stand 50. In the third embodiment, the first fitting convex portion 81A and the second fitting convex portion 81B have centers of gravity G1 and G2 at positions eccentric to the rotation axis AR in a cross section perpendicular to the rotation axis AR.

[0111] By decentering the center of gravity G1 of the first fitting protrusion 81A from the rotation axis AR in a cross section perpendicular to the rotation axis AR, the first fitting protrusion 81A can be enlarged in the direction perpendicular to the rotation axis AR without increasing the diameter of the endoscope.

[0112] In addition, by decentering the center of gravity G2 of the second fitting convex portion 81B from the rotation axis AR in a cross section perpendicular to the rotation axis AR, the second fitting convex portion 81B can be enlarged in the direction perpendicular to the rotation axis AR without increasing the diameter of the endoscope. As in the first and second embodiments, it is preferable that the center of gravity G1 is decentered from the rotation axis AR in the extension direction of the treatment tool support portion 50A, and it is also preferable that the center of gravity G2 is decentered from the rotation axis AR in the extension direction of the lever portion 58.

[0113] Although the present invention has been described above, the present invention is not limited to the above examples, and various improvements and modifications may be made without departing from the gist of the present invention. [Explanation of symbols]

[0114] 1. Ultrasonic inspection system 2. Ultrasound endoscope 3 Ultrasonic processor unit 4. Endoscope processor unit 5 Light source device 6 Monitors 10 Insertion section 11 Control section 14 Universal Code 14A Connector 14B Connector 14C Connector 15 Soft part 16 Curved section 17A Water tank 17B Suction pump 20 Tip 21 Angle knob 22 Air / water supply button 23 Suction button 24 Standing operation lever 25 Treatment tool inlet 30 Outer case 30A Outer case body 30B Outer case cover 32 Base 33 Nobube 38 Endoscopic observation section 40A First Slope 40B 2nd Slope 41 Treatment tool outlet 42 Observation window 43A First lighting window 43B Second lighting window 44 Air and water supply nozzle 45 Standing platform storage space 45A opening 49 Standing Platform Assembly 50 Standing platform 50A Treatment tool support part 51 Assembly body 52 Standing lever 52A Wide surface 53 Base 53A Top 53B Recess 54 Partition 54A Left side 55 Treatment tool insertion part 55A Treatment tool insertion hole 56 Lever housing 57 Retaining hole 58 Lever section 59 Lever storage cover 60 Standing platform body 61 Fitting recess 61A First fitting recess 70 Treatment tool erection mechanism 70A Treatment tool standing mechanism 70B Treatment tool standing mechanism 71 Fitting recess 71A Second fitting recess 80 Rotating shaft 81 Fitting protrusion 81A First fitting protrusion 81B Second fitting protrusion 82 Storage Groove 90 Seal part 100 Ultrasound Observation Section 102 Ultrasonic transducer 110 Pipeline components 112 Control Cable 113 Control wire 114 Guide tube 116 Wire connection part 150 Treatment tools AR Rotation Axis G, G1, G2 Center of gravity LA Longitudinal Axis

Claims

1. A treatment tool standing mechanism comprising: a rotating shaft portion rotatably supported around a rotating shaft; a standing platform rotatably connected to one end of the rotating shaft portion; and a standing lever rotatably connected to the other end of the rotating shaft portion, wherein a rotational force is applied to the standing lever, and the rotational force is transmitted to the standing platform via the rotating shaft portion, At least one of the engagement members of the standing lever and the standing base has an engagement recess that opens toward the rotation shaft portion, the rotating shaft portion has a fitting protrusion that fits into the fitting recess so as not to rotate relative to the rotating shaft portion, the fitting protrusion has a center of gravity at a position eccentric from the rotation shaft in a cross section perpendicular to the rotation shaft, The fitted member is the stand, The stand has a treatment tool support portion extending from the rotation axis in a direction perpendicular to the rotation axis, The fitting protrusion has a center of gravity at a position eccentric from the rotation axis in an extension direction of the treatment instrument support portion in a cross section perpendicular to the rotation axis. Treatment tool erection mechanism.

2. A treatment tool standing mechanism comprising: a rotating shaft portion rotatably supported around a rotating shaft; a standing platform rotatably connected to one end of the rotating shaft portion; and a standing lever rotatably connected to the other end of the rotating shaft portion, wherein a rotational force is applied to the standing lever, and the rotational force is transmitted to the standing platform via the rotating shaft portion, At least one of the engagement members of the standing lever and the standing base has an engagement recess that opens toward the rotation shaft portion, the rotating shaft portion has a fitting protrusion that fits into the fitting recess so as not to rotate relative to the rotating shaft portion, the fitting protrusion has a center of gravity at a position eccentric from the rotation shaft in a cross section perpendicular to the rotation shaft, the fitted member is the standing lever, The standing lever has a lever portion extending from the rotation shaft in a direction perpendicular to the rotation shaft, the fitting protrusion has a center of gravity at a position eccentric from the rotation axis in an extension direction of the lever portion in a cross section perpendicular to the rotation axis. Treatment tool erection mechanism.

3. A treatment tool standing mechanism comprising: a rotating shaft portion rotatably supported around a rotating shaft; a standing platform rotatably connected to one end of the rotating shaft portion and integrally with the rotating shaft portion; and a standing lever rotatably connected to the other end of the rotating shaft portion, wherein a rotational force is applied to the standing lever, and the rotational force is transmitted to the standing platform via the rotating shaft portion, At least one of the engagement members of the standing lever and the standing base has an engagement recess that opens toward the rotation shaft portion, the rotating shaft portion has a fitting protrusion that fits into the fitting recess so as not to rotate relative to the rotating shaft portion, the fitting protrusion has a center of gravity at a position eccentric from the rotation shaft in a cross section perpendicular to the rotation shaft, the fitted members are the stand and the stand lever, the fitting recess includes a first fitting recess provided in the stand and opening toward the rotation shaft portion, and a second fitting recess provided in the stand lever and opening toward the rotation shaft portion, the fitting protrusion includes a first fitting protrusion provided at the one end of the rotating shaft portion and fitted into the first fitting recess so as to be non-rotatable relative to the rotating shaft portion, and a second fitting protrusion provided at the other end of the rotating shaft portion and fitted into the second fitting recess so as to be non-rotatable relative to the rotating shaft portion, the first fitting protrusion and the second fitting protrusion have centers of gravity at positions eccentric to the rotation axis in a cross section perpendicular to the rotation axis, The stand has a treatment tool support portion extending from the rotation axis in a direction perpendicular to the rotation axis, The standing lever has a lever portion extending from the rotation shaft in a direction perpendicular to the rotation shaft, the first fitting protrusion has a center of gravity at a position eccentric from the rotation axis in an extension direction of the treatment instrument support portion in a cross section perpendicular to the rotation axis, the second fitting protrusion has a center of gravity at a position eccentric from the rotation axis in an extension direction of the lever portion in a cross section perpendicular to the rotation axis. Treatment tool erection mechanism.

4. A seal is provided between the stand and the stand lever. The treatment tool raising mechanism according to any one of claims 1 to 3.

5. a holding portion having a holding hole for rotatably holding the rotating shaft portion, The seal portion is disposed between an outer circumferential surface of the rotating shaft portion and an inner circumferential surface of the retaining hole. The treatment tool raising mechanism according to claim 4.

6. When the fitting protrusion and the rotation shaft portion are projected onto a plane perpendicular to the rotation shaft, the fitting protrusion is included in a formation area of ​​the rotation shaft portion. The treatment tool raising mechanism according to any one of claims 1 to 5.

7. The fitting recess has a closed shape in a cross section perpendicular to the rotation axis. The treatment tool raising mechanism according to any one of claims 1 to 6.

8. An ultrasonic endoscope comprising the treatment tool erecting mechanism according to any one of claims 1 to 7.

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