Endoscope working channel assembly and endoscope

Abstract

The present application provides an endoscope working channel assembly and an endoscope, the endoscope working channel assembly comprising an operation part and an insertion part; the insertion part comprising an insertion tube and a tip head, the front end of the insertion tube being connected with the tip head, and the rear end of the insertion tube being connected with the operation part; further comprising a working channel; the shape of the radial cross section of the working channel comprises an ellipse; a front water channel is arranged in the working channel; the front water channel extends along the axial direction of the working channel, and the front water channel is arranged on at least one wall surface of the working channel extending along the long axis direction of the ellipse. The present application facilitates the cooperation of the front water and the working channel, conveniently realizes the bending deformation of the front end of the working channel, realizes the maximization of the cross-sectional area of the working channel, provides sufficient observation space at the front end of the working channel under the premise of not affecting the smooth entry of the insertion part into the human body, facilitates the entry and exit of more instruments into the working channel, and meets different clinical treatment requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, in particular to an endoscope working channel assembly and an endoscope. BACKGROUND

[0002] An endoscope is a commonly used detection instrument in modern medical diagnosis and treatment, which is often used for diagnosis and treatment of ear, nose, throat, lower respiratory tract, digestive tract, urinary tract, reproductive system, abdominal cavity and thoracic cavity, etc. It has the advantages of convenient application, small trauma, clear diagnosis under direct vision, easy biopsy, etc.

[0003] An endoscope includes an operation part and an insertion part. During use, the insertion part is used to extend into the human body until the tip head at the front end of the insertion part reaches the lesion site. The operator can control the tip head to face different directions by pulling the steel wire rope in the operation part. Based on the optical system and working channel set in the tip head, detection and treatment of the lesion site can be achieved.

[0004] In related technologies, the optical system and working channel are usually integrated on the same end face of the tip head. As shown in FIG. 1, a camera 101, a nozzle 102, an illumination light window 103, a front water inlet 104 and a channel port 105 are arranged on the tip head 22, wherein the channel port 105 is fixedly connected with the front end of the working channel. During use of the endoscope, due to the size limitation of the tip head, the diameter of the channel port is limited, and it is difficult to conveniently control the instruments to enter and exit the working channel, which leads to the fact that many clinical treatment needs cannot be directly met by the endoscope, thereby limiting the clinical application scenarios of the endoscope. Figure 1 Meanwhile, in the patent document with application number 202111548560.7, a front-end movable endoscope is disclosed. The endoscope is provided with an elastic deformation part at the head end, and the deformation state of the elastic deformation part is controlled by an elastic deformation part driving unit. Based on the deformation state of the elastic deformation part, the head end is switched between the closed state and the open state along the radial direction. Thus, the working channel can be controlled to extend from the head end when the head end of the endoscope is in the open state, so as to control the instruments to enter and exit the working channel.

[0005] However, the patent does not disclose the arrangement and control scheme of the front water when the head end of the movable endoscope is in the open state, and cannot solve the problem of how to control the front water to cooperate with the working channel after moving and deforming.

[0006] In addition, the patent also does not disclose the technical scheme of how to control the working channel to extend and retract relative to the head end, which is not convenient for the cooperation of the front water and the working channel, and is not convenient for controlling the bending deformation of the front end of the working channel to meet various detection needs, and it is difficult to conveniently control the head end to switch between the closed state and the open state.

[0007] ​SUMMARY

[0008] The present application provides an endoscope working channel assembly and an endoscope to solve or improve at least one technical problem existing in the prior art, so as to realize convenient control of instruments in and out of the working channel.

[0009] The present application provides an endoscope working channel assembly, comprising: an operation part and an insertion part; the insertion part comprises: an insertion tube and a tip head, the front end of the insertion tube is connected with the tip head, and the rear end of the insertion tube is connected with the operation part; further comprising: a working channel; the shape of the radial cross section of the working channel comprises an ellipse; a front water channel is arranged in the working channel; the front water channel extends along the axial direction of the working channel, and the front water channel is arranged on at least one wall surface of the working channel extending along the long axis direction of the ellipse.

[0010] According to the present application, an endoscope working channel assembly further comprises: a traction driving member and a traction rope; the working channel comprises a main tube segment and a deformable tube segment; the front end of the main tube segment is connected with the rear end of the deformable tube segment; the working channel is provided with a guide structure extending along the axial direction of the working channel; the first end of the traction rope is connected with the front end of the deformable tube segment, the second end of the traction rope extends to the rear end of the main tube segment under the guidance of the guide structure, and is connected with the traction driving member; and the traction driving member is connected with the operation part.

[0011] According to the present application, an endoscope working channel assembly, the tip head has a first state of closing the front port and a second state of opening the front port; the working channel is movably arranged in the insertion tube; the endoscope working channel assembly further comprises a telescopic driving part; the telescopic driving part is connected with the working channel to drive the working channel to move along the axial direction of the insertion tube; in the case that the tip head is in the first state, the front end of the working channel is located in the insertion tube; in the case that the tip head is in the second state, the front end of the working channel extends out of the front port.

[0012] According to the present application, an endoscope working channel assembly, the telescopic driving part comprises: a rotary driving part, a first sleeve and a second sleeve; one end of the first sleeve is rotatably arranged at one end of the operation part, the other end of the first sleeve and one end of the second sleeve form a screw rod connecting structure, and the other end of the second sleeve is fixedly connected with the rear end of the working channel; the rotary driving part is arranged in the operation part, and is used to drive the first sleeve to rotate; the outer side wall of the working channel is in contact with the cable in the insertion tube and / or the inner side wall of the insertion tube, so as to prevent the working channel from rotating in the insertion tube.

[0013] According to the endoscope working channel assembly provided by the present application, the traction driving member comprises a linear motor; the linear motor is arranged on the operation part, and the output end of the linear motor is connected with the second end of the traction rope to traction the second end of the traction rope; or, the traction driving member comprises a memory alloy member and a heating assembly; one end of the memory alloy member is connected with the second end of the traction rope, and the other end of the memory alloy member is connected with the operation part; the memory alloy member is connected with the heating assembly, and the memory alloy member traction the second end of the traction rope through the heat deformation of the memory alloy member; or, the traction driving member comprises a manual connecting rod mechanism; the manual connecting rod mechanism is arranged on the operation part, and the manual connecting rod mechanism is connected with the second end of the traction rope to traction the second end of the traction rope.

[0014] According to the endoscope working channel assembly provided by the present application, the deformable tube segment comprises a leading end part and a bending part; the rear end of the leading end part is connected with the front end of the bending part, and the rear end of the bending part is connected with the front end of the main tube segment; the bending part has at least one bending direction.

[0015] According to the endoscope working channel assembly provided by the present application, the guide structure is arranged on at least one wall surface of the working channel extending along the short axis direction of the ellipse.

[0016] According to the endoscope working channel assembly provided by the present application, the shape of the cross section of the water feeding channel along the radial direction comprises any one of a circle, an ellipse, a rectangle, a sector and a sector ring; and / or, the water outlet direction of the water feeding channel is parallel to the axial direction of the front end of the deformable tube segment, or the water outlet direction of the water feeding channel is towards the inner side of the front end of the deformable tube segment and forms an acute angle with the axial direction of the front end of the deformable tube segment.

[0017] According to the endoscope working channel assembly provided by the present application, a plurality of tube cavities are arranged in the working channel, the plurality of tube cavities are isolated from each other, and the plurality of tube cavities respectively extend along the axial direction of the working channel; and / or, the inner wall of the insertion tube is uniformly distributed with four spring tubes along the circumference, the four spring tubes respectively define a first quadrant region, a second quadrant region, a third quadrant region and a fourth quadrant region in the insertion tube with respect to the central axis of the insertion tube; on the radial plane of the insertion tube, more than 50% of the structure of the working channel is located in the third quadrant region, or more than 50% of the structure of the working channel is located in the fourth quadrant region.

[0018] The present application also provides an endoscope comprising the endoscope working channel assembly according to any one of the above.

[0019] The endoscope working channel assembly and the endoscope provided by the application are based on the improvement of the working channel of the endoscope, facilitate the cooperation of the forward water and the working channel, and conveniently realize the bending deformation of the front end of the working channel to meet various detection requirements.

[0020] Further, the application controls the front end head to switch between the first state of closing the front port of the insertion tube and the second state of opening the front port, controls the front end of the working channel to be located in the insertion tube when the front end head is in the first state, and controls the front end of the working channel to extend out of the front port when the front end head is in the second state. Thus, compared with the fixed working channel, the application can maximize the sectional area of the working channel based on the insertion tube with the same outer diameter, can control the front end of the working channel to extend out of the front port after the front end head reaches the lesion position without affecting the smooth entry of the insertion part into the human body, can provide sufficient observation space at the front end of the working channel, facilitate more instruments to enter and exit the working channel, meet different clinical treatment requirements, and be suitable for various clinical application scenarios of the endoscope. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0022] Figure 1 is a structure schematic view of the front end head of the endoscope in the prior art;

[0023] Figure 2 is a structure schematic view of the endoscope provided by the application;

[0024] Figure 3 is a structure schematic view of the endoscope working channel assembly provided by the application;

[0025] Figure 4 is a structure schematic view of the endoscope working channel assembly provided by the application;

[0026] Figure 5 is a structure schematic view of the endoscope working channel assembly provided by the application;

[0027] Figure 6 is a structure schematic view of the first sleeve provided by the application;

[0028] Figure 7 is a structure schematic view of the second sleeve provided by the application;

[0029] Figure 8is the structural schematic view of the front end of the working channel relative to the insertion tube when the front end is in the first state;

[0030] Figure 9 is the structural schematic view of the front end of the working channel relative to the insertion tube when the front end is in the second state;

[0031] Figure 10 is the structural schematic view of the telescopic control of the working channel through the K-shaped insertion port manually or electrically;

[0032] Figure 11 is the structural schematic view of the traction of the second end of the traction rope through the manual connecting rod mechanism;

[0033] Figure 12 is the structural schematic view of the Figure 11 is the installation structural schematic view of the structure shown in the operation part;

[0034] Figure 13 is one of the structural schematic views of the working channel provided by the application;

[0035] Figure 14 is the second structural schematic view of the working channel provided by the application;

[0036] Figure 15 is the structural schematic view of the Figure 14 is the end face structural schematic view of the working channel shown;

[0037] Figure 16 is the third structural schematic view of the working channel provided by the application;

[0038] Figure 17 is the fourth structural schematic view of the working channel provided by the application;

[0039] Figure 18 is the fifth structural schematic view of the working channel provided by the application;

[0040] Figure 19 is one of the installation structural schematic views of the working channel relative to the insertion tube provided by the application;

[0041] Figure 20 is the second installation structural schematic view of the working channel relative to the insertion tube provided by the application;

[0042] Reference signs:

[0043] 101: camera; 102: nozzle; 103: illumination light window;

[0044] 104: front water outlet; 105: pincer channel; 1: operation part;

[0045] 2: Insertion part; 3: Light guide plug; 4: K-type tee;

[0046] 5: Working channel; 6: Rotary drive unit; 7: First sleeve;

[0047] 8: Second sleeve; 9: Traction drive component; 10: Traction rope;

[0048] 901: Linear motor; 911: Rotating ring; 912: Traction assembly;

[0049] 21: Insertion tube; 22: Tip; 51: Main tube section;

[0050] 52: Bend; 53: Tip; 501: Front water supply channel;

[0051] 502: Lumen; 211: Spring tube; 41: Adapter tube;

[0052] 111: Gear; 112: Gear ring; 71: Sealing structure;

[0053] 81: First segment; 82: Second segment; 503: Guiding passage. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0055] The following is combined Figures 1-20 This invention describes an endoscope working channel assembly and an endoscope.

[0056] like Figures 2 to 5 As shown, this embodiment provides an endoscope working channel assembly, including: an operation part 1 and an insertion part 2; the insertion part 2 includes: an insertion tube 21 and a tip 22, the front port of the insertion tube 21 is connected to the tip 22, and the rear port of the insertion tube 21 is connected to the operation part 1; it also includes: a telescopic drive part and a working channel 5; the tip 22 has a first state of closing the front port of the insertion tube 21 and a second state of opening the front port of the insertion tube 21; the working channel 5 is movably disposed in the insertion tube 21; the telescopic drive part is connected to the working channel 5 to drive the working channel 5 to move axially along the insertion tube 21.

[0057] like Figure 8As shown, in the case where the tip 22 is in the first state, the rear end of the tip 22 is connected with the front port of the insertion tube 21 to close the front port of the insertion tube 21, at this time, the front end of the working channel 5 is located in the insertion tube 21; as shown Figure 9 As shown, in the case where the tip 22 is in the second state, the rear end of the tip 22 is connected with the front port of the insertion tube 21, but the tip 22 moves to one side of the front port, so that the rear end of the tip 22 covers part of the area of the front port, or the rear end of the tip 22 no longer covers the front port, at this time, the front end of the working channel 5 extends out of the area of the front port of the insertion tube 21 which is not covered.

[0058] In the embodiment, the tip 22 can switch between the first state and the second state by flipping or rotating. In a specific embodiment, the tip 22 and the front port of the insertion tube 21 can adopt the connection structure disclosed in the application publication No. CN107374575A.

[0059] As can be seen from the above, based on the switching of the tip 22 between the first state of closing the front port and the second state of opening the front port, the front end of the working channel 5 can be controlled to be located in the insertion tube 21 when the tip 22 is in the first state, and the front end of the working channel 5 can be controlled to extend out of the front port when the tip 22 is in the second state. Thus, compared with the working channel fixedly arranged, the present application can maximize the sectional area of the working channel 5 based on the insertion tube of the same outer diameter, and on the premise that the insertion part 2 can smoothly enter the human body, the front end of the working channel 5 can be controlled to extend out of the front port when the tip 22 reaches the lesion site, so as to provide sufficient observation space at the front end of the working channel 5, facilitate more instruments to enter and exit the working channel 5, meet different clinical treatment needs, and be suitable for various clinical application scenarios of endoscopes.

[0060] Here, the operation part 1 in the embodiment has a housing, and the K-shaped three-way joint 4 is arranged in the housing. The K-shaped three-way joint 4 includes an adapter port, an instrument insertion port and a suction port. The adapter port extends to a first assembly port at the front end of the housing and communicates with the rear end of the working channel 5. The first assembly port of the housing communicates with the rear port of the insertion tube 21. The instrument insertion port extends to a second assembly port at the side of the housing, so that the operator can deliver the surgical instrument into the working channel 5 through the instrument insertion port. The suction port extends to a third assembly port at the rear end of the housing and is connected with the pumping device. Based on the pumping action of the pumping device, the liquid at the lesion site can be pumped out of the human body under the guidance of the working channel 5.

[0061] As shown Figure 2As shown in the figure, the rear end of the housing in this embodiment is also provided with a fourth assembly port, which is connected to the light guide plug 3. In this embodiment, the tip 22 is equipped with a light source assembly, which includes a camera and a light source output head. The cables corresponding to the camera and the light source output head extend along the gap between the insertion tube 21 and the working channel 5 to the rear end of the housing and are connected to the light guide plug 3.

[0062] Furthermore, when the tip 22 is in the second state, in order to facilitate the entry and exit of surgical instruments into and out of the working channel 5 and to obtain sufficient observation space at the front end of the working channel 5, this embodiment can be configured such that when the tip 22 is in the second state, the axial distance of the front end of the working channel 5 relative to the front port is greater than the axial distance of the lens of the camera on the tip 22 relative to the front port.

[0063] like Figures 3 to 5 As shown, in order to facilitate the control of the working channel 5 moving axially along the insertion tube 21, the telescopic drive unit shown in this embodiment includes: a rotary drive unit 6, a first sleeve 7, and a second sleeve 8; one end of the first sleeve 7 is rotatably disposed at one end of the operating unit 1, the other end of the first sleeve 7 and one end of the second sleeve 8 form a screw connection structure, and the other end of the second sleeve 8 is fixedly connected to the rear end of the working channel 5; the rotary drive unit 6 is disposed at the operating unit 1, and the rotary drive unit 6 is used to drive the first sleeve 7 to rotate; the radial cross-section of the working channel 5 is non-circular, and the outer wall of the working channel 5 contacts the cable in the insertion tube 21 and / or the inner wall of the insertion tube 21 to prevent the working channel 5 from rotating in the insertion tube 21.

[0064] like Figure 5 and Figure 6 As shown, the adapter 41 is provided at the interface of the K-type tee 4, and one end of the first sleeve 7 is rotatably fitted onto the outside of the adapter 41. The rotary drive unit 6 shown in this embodiment is provided on the K-type tee 4. A gear 111 is provided at the output end of the rotary drive unit 6, and a gear ring 112 is provided on the outer wall near one end of the first sleeve 7. The gear ring 112 meshes with the gear 111, so that when the output end of the rotary drive unit 6 rotates, the first sleeve 7 can rotate relative to the adapter 41 based on the rotational action between the gear 111 and the gear ring 112. The rotary drive unit 6 can be a servo motor, as is known in the art.

[0065] Furthermore, in this embodiment, an external thread structure is provided on the outer side wall near the other end of the first sleeve 7, and an internal thread structure is provided on the inner side wall near the other end of the second sleeve 8. The external thread structure and the internal thread structure are adapted to each other so that the other end of the first sleeve 7 and the other end of the second sleeve 8 form a screw connection structure.

[0066] like Figure 7As shown, since the radial cross section of the working channel 5 is non-circular, in order to realize the connection of the second sleeve 8 with the opposite end of the working channel 5, the second sleeve 8 is provided as a first segment 81 and a second segment 82 in this embodiment, the first segment 81 is connected with the second segment 82, the first segment 81 is circular, and the inner threaded structure shown in the above embodiment is arranged on the inner wall surface of the first segment 81, and the second segment 82 is inserted into the rear end of the working channel 5, the second segment 82 is matched with the working channel 5 in shape, and the second segment 82 is connected with the opposite wall surface of the working channel 5.

[0067] Therefore, since the working channel 5 cannot rotate in the insertion tube 21 based on the design of its own shape, when the rotating driving part 6 drives the first sleeve 7 to rotate relative to the adapter tube 41, the second sleeve 8 will drive the working channel 5 to move along the axial direction of the insertion tube 21. In actual control, by controlling the rotation direction of the rotating driving part 6, the extension direction of the working channel 5 relative to the insertion tube 21 can be controlled, and by controlling the rotation angle of the rotating driving part 6, the extension stroke of the working channel 5 relative to the insertion tube 21 can be controlled.

[0068] It should be pointed out here that the radial cross section of the working channel 5 shown in this embodiment is non-circular, which can be understood as an oval, a triangle, a rectangle, a "D" shape, and other special shapes except for a circular shape.

[0069] In order to prevent leakage of body fluids at the connection part between the working channel 5 and the adapter of the K-type tee joint 4, the sealing structure 71 can also be arranged between the opposite wall surfaces of the first sleeve 7 and the second sleeve 8 in this embodiment, so that when the first sleeve 7 and the second sleeve 8 rotate relative to each other, a better sealing effect can be achieved between the first sleeve 7 and the second sleeve 8. Among them, the sealing structure 71 is preferably a rubber sealing ring sleeved on the outer side surface of the first sleeve 7.

[0070] In addition, as shown, Figure 10 Since the instrument insertion port of the K-type tee joint 4 extends to the second assembly port of the shell, the pipeline connected with the instrument insertion port can be pushed or pulled manually at the second assembly port in this embodiment to change the axial position of the K-type tee joint 4 relative to the shell, and the extension action of the working channel 5 can also be realized.

[0071] Further, after the front end of the working channel 5 extends out of the front port of the insertion tube 21, the part of the working channel 5 extending out of the front port can also be bent in this embodiment to meet various clinical treatment needs.

[0072] As shown, Figure 4As shown, the embodiment also provides the traction driving member 9 and the traction rope 10, and sets the working channel 5 as the main pipe segment 51 and the deformable pipe segment; the main pipe segment 51 is the main part of the working channel 5, and extends along the length direction of the insertion tube 21, the front end of the main pipe segment 51 is connected with the rear end of the deformable pipe segment; the working channel 5 is provided with the guide structure, which extends along the axial direction of the working channel 5; the first end of the traction rope 10 is connected with the front end of the deformable pipe segment, the second end of the traction rope 10 extends to the rear end of the main pipe segment 51 under the guidance of the guide structure, and is connected with the traction driving member 9, the traction driving member 9 is connected with the operation part 1. Obviously, when the deformable pipe segment is controlled to bend through the traction rope 10, the direction of the traction force applied by the traction driving member 9 to the second end of the traction rope 10 is opposite to the insertion direction of the insertion tube 21 towards the human body.

[0073] Specifically, as shown in the embodiment, the main pipe segment 51 is a hard pipe segment, the deformable pipe segment is a snake bone pipe segment widely used in the endoscope field, and the length of the main pipe segment 51 is greater than the length of the deformable pipe segment. The guide structure shown in the embodiment can be a guide channel 503 constructed in the pipe wall of the working channel 5. In this way, when the traction force is applied to the second end of the traction rope 10 by the traction driving member 9, the elastic deformation of the deformable pipe segment towards the side where the guide structure is located can be controlled. Correspondingly, when the traction driving member 9 releases the traction of the second end of the traction rope 10, the deformable pipe segment can restore to the original state.

[0074] It should be pointed out here that the embodiment shown can configure a set of traction driving member 9 and traction rope 10 for one working channel 5 to control the deformable pipe segment to bend towards one direction. The embodiment can also configure multiple sets of one-to-one corresponding traction driving member 9 and traction rope 10 for one working channel 5, and arrange multiple traction ropes 10 along the circumferential direction of the working channel 5 to control the deformable pipe segment to bend towards different directions. Here, the traction rope 10 shown in the embodiment is preferably a steel wire rope.

[0075] In the first embodiment, as shown in Figure 5 The traction driving member 9 includes a linear motor 901; the linear motor 901 is arranged on the K-shaped three-way joint 4 in the operation part 1, the output end of the linear motor 901 is connected with the second end of the traction rope 10 to traction the second end of the traction rope 10, so as to control the bending of the deformable pipe segment of the working channel 5.

[0076] As shown in Figure 4 In the case that one traction rope 10 is arranged on the upper side of the working channel 5 along the axial direction, when the linear motor 901 applies traction force to the second end of the traction rope 10, the front end of the deformable pipe segment of the working channel 5 can be conveniently controlled to bend towards the upper side as shown. Figure 4

[0077] ​In the second embodiment, the traction driver 9 comprises a memory alloy piece and a heating assembly, one end of the memory alloy piece is connected with the second end of the traction rope 10, and the other end of the memory alloy piece is connected with the operation part 1; the memory alloy piece is connected with the heating assembly, and the memory alloy piece can traction the second end of the traction rope 10 through the heat deformation of itself.

[0078] Specifically, the heating assembly shown in the embodiment comprises a power supply and a wire, the power supply is connected with the memory alloy piece through the wire, and the power supply, the wire and the memory alloy piece form a heating electric circuit.

[0079] In this embodiment, the memory alloy piece is in an elongated state at low temperature or room temperature, and is in a shortened state at high temperature. In this way, the length of the memory alloy piece can be controlled to shrink by heating the memory alloy piece through the heating assembly, so as to traction the second end of the traction rope 10, and the purpose of controlling the bending of the deformable pipe section of the working channel 5 is achieved.

[0080] In the second embodiment, as shown in Figure 11 and Figure 12 , the traction driver 9 comprises a manual linkage mechanism; the manual linkage mechanism is arranged in the operation part 1, and the manual linkage mechanism is connected with the second end of the traction rope 10 to traction the second end of the traction rope 10.

[0081] Specifically, the manual linkage mechanism shown in the embodiment comprises a rotating ring 911 and a traction assembly 912, the first end of the rotating ring 911 is connected with an operation handle, the second end of the rotating ring 911 is connected with one end of the traction assembly 912, the other end of the traction assembly 912 is connected with the second end of the traction rope 10, and the rotating ring 911 is rotatably sleeved on the fixed column at the rear end of the shell. In this way, when the operator controls the rotating ring 911 to rotate relative to the shell through the operation handle, the traction assembly 912 can be converted from a relaxed state to a tensioned state, until the traction force is applied to the second end of the traction rope 10, and the purpose of controlling the bending of the deformable pipe section of the working channel 5 is achieved.

[0082] As shown in Figure 13 , in order to control the bending of the deformable pipe section, the deformable pipe section shown in the embodiment comprises a leading end part 53 and a bending part 52; the rear end of the leading end part 53 is connected with the front end of the bending part 52, and the rear end of the bending part 52 is connected with the front end of the main pipe section 51.

[0083] Here, the bending part 52 shown in the embodiment has at least one bending direction, the bending part 52 is a snake pipe section known in the art, the leading end part 53 is a hard pipe section, and the axial length of the leading end part 53 is less than the axial length of the bending part 52.

[0084] Further, the working channel 5 has an elliptical radial cross-section, so that the bending portion 52 of the working channel 5 is more likely to bend towards the short axis direction of the ellipse.

[0085] Correspondingly, the guide structure is arranged on at least one wall surface of the working channel 5 along the short axis direction of the ellipse, and based on the guide of the pulling force on the pulling rope 10, the guide structure can stably control the bending direction of the bending portion 52. The guide structure can be a guide channel 503 arranged in the wall surface of the working channel 5 along the short axis direction of the ellipse.

[0086] Here, the working channel 5 has an elliptical radial cross-section, and based on the spring tube 211 and the cable arranged in the insertion tube 21, compared with the working channel 5 having a circular cross-section, the working channel 5 arranged in the insertion tube 21 has a maximum cross-sectional area while effectively preventing the working channel 5 from rotating in the insertion tube 21.

[0087] As shown in Figure 15 , when the bending portion 52 of the working channel 5 is controlled to bend to the left and / or right along the short axis direction, the guide channel 503 can be arranged on the left and / or right wall surface of the working channel 5 along the short axis direction of the ellipse, and one pulling rope is arranged in each guide channel. Since the front end of the pulling rope is connected to the front end of the working channel 5, the guide channel 503 shown in the embodiment is represented by a dashed circle in Figure 15 .

[0088] Preferably, in order to meet the needs of the endoscope for cleaning the lesion position and the instrument, the working channel 5 is further provided with a front water channel 501, so as to deliver cleaning water to the lesion position through the front water channel 501. The front water channel 501 shown in the embodiment extends along the axial direction of the working channel 5, and the front water channel 501 is arranged on at least one wall surface of the working channel 5 along the long axis direction of the ellipse, so as to avoid affecting the bending of the bending portion 52 of the working channel 5 along the short axis direction.

[0089] As shown in Figure 13 , the embodiment is provided with one front water channel 501 on the lower wall surface of the working channel 5 along the long axis direction. Figure 14 As shown in Figure 15 , the embodiment is provided with one front water channel 501 on the upper wall surface and the lower wall surface of the working channel 5 along the long axis direction.

[0090] In this embodiment, the shape of the cross section of the front water channel 501 is not limited, for example, the shape of the cross section of the front water channel 501 can be any one of a circle, an ellipse, a rectangle, a sector, and a sector ring.

[0091] As shown in Figure 16 , the front water channel 501 is arranged on the lower side wall surface of the working channel 5 along the long axis direction, and the shape of the cross section of the front water channel 501 along the radial direction is a sector ring.

[0092] At the same time, the water outlet direction of the front water channel 501 can be set to meet the treatment needs of the lesion site. For example, the water outlet direction of the front water channel 501 can be parallel to the axial direction of the front end of the deformable tube segment, or the water outlet direction of the front water channel 501 can be towards the inner side of the front end of the deformable tube segment and form an acute angle with the axial direction of the front end of the deformable tube segment. The acute angle can be 15°-60°, for example, the acute angle can be 15°, 20°, 30°, 45°, 60°, etc., which is not limited here.

[0093] Preferably, in order to meet the insertion needs of the working channel 5 for various instruments and avoid interference between different instruments in the working channel 5, the working channel 5 is provided with a plurality of lumen 502, the plurality of lumen 502 are isolated from each other, and the plurality of lumen 502 respectively extend along the axial direction of the working channel 5.

[0094] As shown in Figure 17 , three lumen 502 and a front water channel 501 with a circular cross section are arranged in the working channel 5. Figure 18 As shown in , two lumen 502 and a front water channel 501 with a circular cross section are arranged in the working channel 5.

[0095] Based on the above-mentioned scheme of the embodiment, the inner wall surface of the insertion tube 21 is uniformly distributed with four spring tubes 211 along the circumference, a steel wire is arranged in each spring tube 211, one end of the steel wire is connected to the front end of the insertion tube 21, and the other end of the steel wire is connected to the driving component. In this way, based on the driving component and the four steel wires, the front end of the insertion tube 21 can be controlled to bend in four different directions.

[0096] Figure 19 and Figure 20As shown, inside the insertion tube 21, four spring tubes 211 define the first quadrant region I, the second quadrant region II, the third quadrant region III, and the fourth quadrant region IV respectively relative to the central axis of the insertion tube 21. The first quadrant region I, the second quadrant region II, the third quadrant region III, and the fourth quadrant region IV are arranged in a counterclockwise direction relative to the central axis of the insertion tube 21.

[0097] like Figure 19 As shown, on the radial plane of the insertion tube 21, more than 50% of the structure of the working channel 5 is located in the third quadrant region III. At this time, based on the assembly structure of the insertion tube 21 and the working channel 5, it can be used for the detection of the upper digestive tract of the human body.

[0098] like Figure 20 As shown, on the radial plane of the insertion tube 21, more than 50% of the structure of the working channel 5 is located in the fourth quadrant region IV. At this time, based on the assembly structure of the insertion tube 21 and the working channel 5, it can be used for the detection of the lower digestive tract of the human body.

[0099] Preferably, this embodiment also provides an endoscope, including: an endoscope working channel assembly as described in any of the above.

[0100] Specifically, since the endoscope includes an endoscope working channel assembly, and the specific structure of the endoscope working channel assembly is as described in the above embodiments, the endoscope shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects brought about by all the technical solutions of the above embodiments, which will not be described in detail here.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An endoscope working channel assembly, comprising: The operation part is connected with the insertion part; The insertion part comprises an insertion tube and a tip head, the front end of the insertion tube is connected with the tip head, and the rear end of the insertion tube is connected with the operation part; characterized in that Further comprising a working channel; The shape of the radial cross section of the working channel is an ellipse; a front water channel is arranged in the working channel; the front water channel extends along the axial direction of the working channel, and the front water channel is arranged on at least one wall surface of the working channel extending along the long axis of the ellipse, so as to avoid affecting the bending of the curved portion of the working channel along the short axis of the ellipse by the front water channel; At least one wall surface of the working channel along the short axis of the ellipse is provided with a guide structure extending along the axial direction of the working channel, and the guide structure guides the pulling force on the pulling rope, so as to control the bending of the curved portion of the working channel towards the short axis of the ellipse.

2. The endoscope working channel assembly according to claim 1, further comprising a pulling driving member and a pulling rope; The working channel comprises a main tube segment and a deformable tube segment; the front end of the main tube segment is connected with the rear end of the deformable tube segment; the first end of the pulling rope is connected with the front end of the deformable tube segment, the second end of the pulling rope extends to the rear end of the main tube segment under the guidance of the guide structure, and is connected with the pulling driving member; and the pulling driving member is connected with the operation part.

3. The endoscope working channel assembly according to claim 1, wherein The tip head has a first state of closing the front port and a second state of opening the front port; and the working channel is movably arranged in the insertion tube; The endoscope working channel assembly further comprises a telescopic driving part connected with the working channel to drive the working channel to move along the axial direction of the insertion tube; When the tip head is in the first state, the front end of the working channel is located in the insertion tube; and when the tip head is in the second state, the front end of the working channel extends out of the front port.

4. The endoscope working channel assembly according to claim 3, wherein The telescopic driving part comprises a rotary driving part, a first sleeve and a second sleeve; One end of the first sleeve is rotatably arranged at one end of the operation part, the other end of the first sleeve and one end of the second sleeve form a screw rod connecting structure, the other end of the second sleeve is fixedly connected with the rear end of the working channel; the rotary driving part is arranged in the operation part, and the rotary driving part is used to drive the first sleeve to rotate; The outer side wall of the working channel is in contact with the cable in the insertion tube and / or the inner side wall of the insertion tube, so as to prevent the working channel from rotating in the insertion tube.

5. The endoscope working channel assembly according to claim 2, wherein The pulling driving member comprises a linear motor; the linear motor is arranged in the operation part, and the output end of the linear motor is connected with the second end of the pulling rope to pull the second end of the pulling rope. ​ Alternatively, the traction driving member comprises a memory alloy member and a heating assembly, one end of the memory alloy member is connected with the second end of the traction rope, the other end of the memory alloy member is connected with the operation part; the memory alloy member is connected with the heating assembly, and the memory alloy member drives the second end of the traction rope through its thermal deformation; Alternatively, the traction driving member comprises a manual linkage mechanism; the manual linkage mechanism is arranged on the operation part, and the manual linkage mechanism is connected with the second end of the traction rope to drive the second end of the traction rope.

6. The endoscope working channel assembly according to claim 2, wherein the deformable tube section comprises a leading end portion and a bending portion, the rear end of the leading end portion is connected with the front end of the bending portion, the rear end of the bending portion is connected with the front end of the main tube section, and the bending portion has at least one bending direction.

7. The endoscope working channel assembly according to claim 2, wherein the shape of the cross section of the water feeding channel along the radial direction comprises any one of a circle, an ellipse, a rectangle, a sector, and a sector ring. And / or, the water outlet direction of the water feeding channel is parallel to the axial direction in which the front end of the deformable tube section is located, or the water outlet direction of the water feeding channel is towards the inner side of the front end of the deformable tube section and forms an acute angle with the axial direction in which the front end of the deformable tube section is located.

8. The endoscope working channel assembly according to claim 1, wherein a plurality of tube cavities are arranged in the working channel, the plurality of tube cavities are isolated from each other, and the plurality of tube cavities respectively extend along the axial direction of the working channel. And / or, the inner wall surface of the insertion tube is uniformly distributed with four spring tubes along the circumference, the four spring tubes respectively define a first quadrant region, a second quadrant region, a third quadrant region, and a fourth quadrant region in the insertion tube with respect to the central axis of the insertion tube; and more than 50% of the structure of the working channel is located in the third quadrant region or the fourth quadrant region in the radial plane of the insertion tube. The endoscope working channel assembly according to any one of claims 1 to 8. ​ ​ 9. An endoscope characterized by comprising: ​

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