CN117357033A

CN117357033A - Instrument channel assembly, insertion portion, and endoscope

Info

Publication number: CN117357033A
Application number: CN202210759670.6A
Authority: CN
Inventors: 龚鹏程; 荆峰; 邹银辉
Original assignee: Sonoscape Medical Corp
Current assignee: Sonoscape Medical Corp
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2024-01-09

Abstract

The invention discloses an instrument channel assembly, an insertion part and an endoscope, and relates to the technical field of endoscopes. The instrument channel assembly is for guiding a treatment instrument out of a head end mount of an endoscope. The instrument channel assembly comprises a connecting pipe and a clamp pipe which are fixedly connected, an interference surface for preventing the treatment instrument from extending into the connecting pipe from the clamp pipe does not exist at the joint of the clamp pipe and the connecting pipe, the interference of the front end surface of the treatment instrument in the process of penetrating through the instrument channel assembly can be avoided, the clamping feeling of the treatment instrument such as a puncture needle, a spray pipe, a snare and the like in the process of extending out of the head end seat can be further weakened, and the clinical diagnosis and treatment experience is improved.

Description

Instrument channel assembly, insertion portion, and endoscope

Technical Field

The invention relates to the technical field of endoscopes, in particular to an instrument channel assembly, an insertion part and an endoscope.

Background

An endoscope is a medical device with diagnosis and minimally invasive treatment functions. Endoscopes generally include an insertion portion that can extend into a lumen and an operating portion that can control bending of a bending portion in the insertion portion. The head end seat of the insertion part is provided with an imaging probe, so that images in the cavity can be acquired in real time for a doctor to observe; the insertion part is internally and further internally penetrated with an instrument channel assembly, one end of the instrument channel assembly is communicated with a channel opening formed in the operation part, the other end of the instrument channel assembly is communicated with the head end seat, and related treatment instruments can penetrate through the channel opening in the process of endoscopic diagnosis and treatment, and extend out of the head end seat into the cavity body through the guidance of the instrument channel assembly so as to perform minimally invasive treatment.

However, in practical applications, the inventors of the present application found that: under the condition that the bending angle exists in the endoscope, the clamping phenomenon easily occurs in the process that treatment instruments such as a puncture needle, a spray pipe, a snare and the like extend out of the head end seat, and even the treatment instruments can be completely clamped when serious, so that the diagnosis and treatment process of the endoscope is affected.

Disclosure of Invention

Accordingly, the invention aims to provide an instrument channel assembly which can weaken the click feeling in the process that treatment instruments such as a puncture needle, a spray pipe, a snare and the like extend out of a head end seat, and improve the clinical diagnosis and treatment experience.

The invention further aims to provide an insertion part and an endoscope comprising the instrument channel assembly, which can weaken the jamming sense of treatment instruments such as a puncture needle, a spray pipe, a snare and the like in the process of extending out of a head end seat, and improve the clinical diagnosis and treatment experience.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an instrument channel assembly for guiding a treatment instrument out of a head end mount of an endoscope, the instrument channel assembly comprising a fixedly connected adapter tube and a forceps channel tube, the junction of the forceps channel tube and the adapter tube being free of interference surfaces that inhibit the treatment instrument from extending from the forceps channel tube into the adapter tube.

Preferably, the connecting tube comprises a front cylinder body and a rear cylinder body, the inner diameter of the front cylinder body is smaller than that of the rear cylinder body, a positioning surface is formed at the joint of the front cylinder body and the rear cylinder body, the clamp pipe is embedded into the rear cylinder body, and the front end of the clamp pipe is abutted against the positioning surface;

and the width of the pipe wall of the clamp pipe is larger than or equal to the width of the positioning surface in the radial direction.

Preferably, the inner diameter of the clamp pipe is smaller than or equal to the inner diameter of the front cylinder.

Preferably, in the radial direction, an inner edge B of the positioning surface is located outside an inner wall of the front cylinder; the connecting part of the front cylinder body and the rear cylinder body is also provided with a transition surface which is obliquely arranged, and the transition surface is connected with the inner wall of the front cylinder body and the positioning surface.

Preferably, an extension line of the inner wall of the forceps channel pipe intersects with the transition surface.

Preferably, the transition surface comprises a rounded surface and/or a chamfered surface.

Preferably, the forceps channel pipe comprises a hard pipe section and a soft pipe section which are sequentially connected from the front end to the rear end, and the hard pipe section is fixedly connected with the connecting pipe.

Preferably, the length of the hard pipe section is greater than or equal to the length of the rear cylinder body along the axial direction.

Preferably, the connection tube is partially embedded in the forceps channel tube, and one end of the connection tube embedded in the forceps channel tube is formed with a guide inclined surface inclined towards the extending direction of the treatment instrument so as to guide the treatment instrument to extend into the connection tube from the inner wall of the forceps channel tube; the forceps channel pipe comprises a hard pipe section and a soft pipe section which are sequentially connected from the front end to the rear end, and the hard pipe section is fixedly connected with the connecting pipe.

Preferably, the inclination angle of the guide slope is greater than or equal to 45 °.

An insert, comprising:

a head end seat, which is provided with a head end seat channel in a penetrating way;

the instrument channel assembly is characterized in that the connecting pipe in the instrument channel assembly is communicated with the head end seat channel and fixedly connected with the head end seat.

An endoscope includes the above-described insertion portion.

The instrument channel assembly is used for guiding the treatment instrument to extend out of the head end seat of the endoscope, and comprises a connecting pipe and a forceps channel pipe which are fixedly connected, wherein an interference surface for preventing the treatment instrument from extending into the connecting pipe from the forceps channel pipe does not exist at the joint of the forceps channel pipe and the connecting pipe. Because the interference surface which prevents the treatment instrument from extending into the connecting pipe from the forceps channel pipe does not exist at the connecting part of the connecting pipe and the forceps channel pipe, the interference of the front end surface of the treatment instrument in the process of passing through the instrument channel component can be avoided, and then the clamping feeling of the treatment instrument such as a puncture needle, a spray pipe, a snare and the like in the process of extending out of the head end seat can be weakened, and the clinical diagnosis and treatment experience is promoted.

The insertion part and the endoscope comprising the instrument channel assembly provided by the invention can weaken the click feeling in the process that treatment instruments such as a puncture needle, a spray pipe, a snare and the like extend out of the head end seat, and improve the clinical diagnosis and treatment experience.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a prior art instrument channel assembly;

fig. 2 is an enlarged view of D in fig. 1;

FIG. 3 is a schematic view of the lancet of FIG. 2 after the forceps tube has been deformed by compression;

FIG. 4 is a cross-sectional view of a first embodiment of an instrument channel assembly provided by the present invention;

FIG. 5 is an enlarged view of FIG. 4 at F;

FIG. 6 is a block diagram of a nozzle in a first embodiment of an instrument channel assembly provided by the present invention;

FIG. 7 is a cross-sectional view of the nipple shown in FIG. 6;

FIG. 8 is a cross-sectional view of a second embodiment of an instrument channel assembly provided by the present invention;

FIG. 9 is a partial cross-sectional view of a third embodiment of an instrument channel assembly provided by the present invention;

FIG. 10 is a view of the head end of an ultrasonic endoscope provided by the present invention;

FIG. 11 is a cross-sectional view of a head end of an ultrasonic endoscope provided by the present invention;

fig. 12 is a block diagram of an ultrasonic endoscope provided by the present invention.

Reference numerals:

the connecting tube 1, the front cylinder 11, the positioning surface 121, the transition surface 122, the rear cylinder 13 and the guiding inclined surface 14;

a clamp pipe 2, a hard pipe section 21, a soft pipe section 22;

bending part 3, snake bone 31, joint ring 311, bending part crust 32;

head end 4, head end seat 41, head end seat channel 411, ultrasonic probe 42, instrument channel assembly 43, camera 44, illumination window 45, jaw 46, and water vapor nozzle 47;

an insertion section 5;

an operation unit 6;

a light guide 7, a tube 71, and a cable 72;

an ultrasonic connector 8;

a puncture needle 9, a puncture needle sheath 91, and a puncture needle head 92;

an inner ring edge A of the front end surface of the clamp pipe, an inner edge B of the positioning surface and a front end edge C of the transition surface.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In practical application, when the endoscope has a bending angle, the treatment instruments such as the puncture needle 9, the spray pipe, the snare and the like are easy to be blocked in the process of extending out of the head end seat 41, and even can be completely blocked in severe cases, so that the diagnosis and treatment process of the endoscope is affected.

In this regard, it has been found through research and analysis that the main reason for the above problems is: as shown in fig. 1, the conventional instrument channel assembly generally includes a nipple 1 and a crimp tube 2, wherein a portion of the nipple 1 is inserted into the crimp tube 2, and another portion is fixedly connected to a head end seat 41 (not shown) in an insertion portion 5, and an outer circumferential surface of the nipple 1 is adhesively fixed to an inner circumferential surface of the crimp tube 2. Wherein, because the pipe 2 is a soft plastic pipe, in order to avoid puncturing the pipe 2, the end face of the pipe 1 embedded into the pipe 2 is a plane perpendicular to the axial direction, so that an end face step E is formed at the joint of the pipe 1 and the pipe 2 (as shown in fig. 2).

The treatment devices such as the puncture needle 9, the spray tube, the snare and the like are all treatment devices with front end surfaces, and for convenience of explanation, the application will be described by taking the practical application scene of the puncture needle 9 as an example. Specifically, as shown in fig. 10, the puncture needle 9 generally includes a puncture needle sheath 91 and a puncture needle head 92, the puncture needle head 92 is disposed in the puncture needle sheath 91, and the front end surface of the puncture needle sheath 91 is a plane perpendicular to the axial direction. In performing the ultrasonic puncture diagnosis and treatment, both the puncture needle sheath 91 and the puncture needle head 92 need to extend out of the head end seat 41. Wherein, because the puncture needle sheath 91 is made of plastic material, the hardness is higher, and the bending is relatively difficult, so as shown in fig. 1 and 2, when the endoscope has a bending angle, the end surface step E formed at the connection part of the adapter tube 1 and the forceps channel tube 2 easily interferes with the front end surface of the puncture needle sheath 91, which prevents the puncture needle sheath 91 from extending into the adapter tube 1 from the forceps channel tube 2, thereby causing the puncture needle sheath 91 to be blocked in the process of extending out of the head end seat 41 of the endoscope. As shown in fig. 3, the forceps channel tube 2 is easily deformed in the vicinity of the end surface step E as the number of uses increases, and the interference area between the end surface step E and the distal end surface of the puncture needle sheath 91 increases, and the puncture click feeling increases, and even the needle may be jammed, and the needle cannot be withdrawn.

In view of this, the present embodiment provides an instrument channel assembly that also includes the fixedly connected adapter tube 1 and the forceps tube 2, but is different in that in the present application, there is no interference surface (specifically, a surface that makes it difficult for the treatment instrument to protrude from the forceps tube 2 into the adapter tube 1) that prevents the treatment instrument from protruding from the forceps tube 2 into the adapter tube 1 at the connection of the adapter tube 1 and the forceps tube 2. In this way, the interference of the front end surface of the treatment instrument in the process of passing through the instrument channel assembly can be avoided, the jamming sense of the treatment instrument such as the puncture needle 9, the spray pipe, the snare and the like in the process of extending out of the head end seat 41 can be further weakened, and the clinical diagnosis and treatment experience is improved.

In addition, the embodiment of the application also provides an insertion part and an endoscope, which are provided with the instrument channel assembly, and the same technical effects can be obtained.

The instrument channel assembly, insertion and endoscope provided herein will be described in detail with reference to the drawings and specific embodiments. In this embodiment, if not specifically described, an end far from the operator in practical application is referred to as a front end, an end near the operator is referred to as a rear end, and the orientation shown in fig. 7 is taken as an example, where the upper end is the front end, and the lower end is the rear end; taking the orientation shown in fig. 8 as an example, the left end is the front end, and the right end is the rear end.

In one embodiment of the instrument channel assembly provided herein, please refer to fig. 4-7, which includes a nipple 1 and a forceps channel tube 2.

The adapter tube 1 includes a front cylinder 11 and a rear cylinder 13 butted against the rear end of the front cylinder 11. Specifically, the adapter tube 1 is a metal piece. As shown in fig. 6 or 7, the inner diameter of the front cylinder 11 is smaller than the inner diameter of the rear cylinder 13, and a positioning surface 121 is formed at the junction of the front cylinder 11 and the rear cylinder 13. As shown in fig. 5, the forceps channel tube 2 is embedded in the rear cylinder 13, specifically, the rear cylinder 13 is adhesively fixed with the forceps channel tube 2. By embedding the crimp tube 2 in the rear cylinder 13, the connection strength of the crimp tube 1 and the crimp tube 2 can be improved. Specifically, the inner wall of the clamp pipe 2 and the inner wall of the rear cylinder 13 are coaxial cylindrical surfaces, and the inner wall of the clamp pipe 2 and the inner wall of the front cylinder 11 are coaxial cylindrical surfaces.

As shown in fig. 5, the tip of the pipe 2 abuts against the positioning surface 121, and the width of the pipe wall of the pipe 2 is larger than the width of the positioning surface 121 in the radial direction. In other embodiments, the width of the wall of the pipe 2 may also be equal to the width of the locating surface 121 in the radial direction.

Based on the limitation of the inner diameter between structures in the embodiment, after the front end surface of the forceps channel tube 2 is abutted forward to the positioning surface 121, the inner edge B of the positioning surface 121 does not protrude from the inner ring edge A of the front end surface of the forceps channel tube 2 in the radial direction, so that the positioning surface 121 is covered by the front end surface of the forceps channel tube 2, the puncture needle 9 is not blocked by the positioning surface 121 in the process that the puncture needle 9 enters the connecting tube 1 through the forceps channel tube 2, the needle-outlet blocking feeling during diagnosis and treatment of the puncture needle 9 can be weakened, and the clinical diagnosis and treatment experience is improved.

Alternatively, in some embodiments, the inner diameter of the forceps channel tube 2 may be less than or equal to the inner diameter of the front barrel 11. In this way, the puncture needle 9 can directly and smoothly enter the front cylinder 11 under the constraint of the inner wall of the forceps channel tube 2 in the process of entering the connecting tube 1 through the forceps channel tube 2.

Further, as shown in fig. 5, the inner edge B of the positioning surface 121 is located outside the inner wall of the front cylinder 11 in the radial direction. The junction of the front cylinder 11 and the rear cylinder 13 is also formed with a transition surface 122 provided obliquely, specifically, the transition surface 122 is gradually inclined radially outward from front to rear, so that the transition surface 122 is generally horn-shaped. The transition surface 122 connects the inner wall of the front cylinder 11 with the positioning surface 121, and as shown in fig. 7, the rear edge of the transition surface 122 is the inner edge B of the positioning surface 121, and the front edge C of the transition surface 122 is the rear edge of the inner wall of the front cylinder 11.

In this embodiment, the transition surface 122 that inclines to set up has the guide effect, then at pjncture needle 9 through the in-process that the pipe 2 got into takeover 1 of pincers way, pjncture needle 9 after pincers way pipe 2 front end face inner circle edge A, can further move to takeover 1 under the direction of transition surface 122, can further weaken the play needle card of pjncture needle 9 when diagnosing and feel, promotes clinical diagnosis and treatment experience. Of course, in other embodiments, the transition surface 122 may not be provided, and the positioning surface 121 may directly abut against the inner wall of the front cylinder 11 and the inner wall of the rear cylinder 13.

Further, an extension line of the inner wall of the pipe 2 intersects with the transition surface 122. That is, as shown in fig. 5, the rear end edge of the transition surface 122 (i.e., the inner edge B of the positioning surface 121) is located outside the inner ring edge a of the front end surface of the forceps tube 2, and the inner wall of the front cylinder 11 is located inside the inner ring edge a of the front end surface of the forceps tube 2, so that it is ensured that the end surface of the puncture needle head 92 touches the forceps tube 2 even in the worst case when the scope is bent, and the puncture needle 9 is guided into the front cylinder 11 via the transition surface 122.

The transition surface 122 may be a rounded surface and/or a chamfer surface formed by a rounded structure and/or a chamfer structure, which has better guiding capability. Of course, in other embodiments, the transition surface 122 may be formed by conical surfaces with different tapers that are butted sequentially along the axial direction.

In a second embodiment of the instrument channel assembly provided in the present application, as shown in fig. 8, the forceps channel tube 2 includes a hard tube segment 21 and a soft tube segment 22 disposed at the rear side of the hard tube segment 21, where the soft tube segment 22 has better flexibility and can bend along with the bending portion 3 and the insertion tube. The hard pipe section 21 is fixedly connected with the adapter tube 1, in this embodiment, the front end surface of the hard pipe section 21 is abutted against the positioning surface 121 along the axial direction, that is, the front end surface of the hard pipe section 21 is the front end surface of the clamp pipe 2. Specifically, the hard pipe section 21 may be a two-stage hard plastic pipe, so as to ensure that the hard pipe section 21 is hard and the joint with the adapter tube 1 is not easy to deform. Specifically, the hardness of the hard tube section 21 is greater than that of a treatment instrument having a front end face.

In this embodiment, the puncture needle 9 enters the front cylinder 11 after passing through the hard tube section 21, so that the deformation of the front end of the forceps tube 2 caused by the extrusion of the puncture needle 9 as shown in fig. 3 can be avoided, and the smoothness of the movement of the puncture needle 9 can be further improved.

Further, the length of the hard tube section 21 is longer than the length of the rear cylinder 13 in the axial direction. As shown in fig. 8, the front half of the hard tube section 21 is located in the rear cylinder 13, and the rear half is located outside the rear cylinder 13. That is, the front ends of both the hard tube segment 21 and the rear cylinder 13 are aligned, and the rear end of the hard tube segment 21 is behind the rear end of the rear cylinder 13, so that the head end of the forceps tube 2 can be prevented from tilting in the endoscope-bent state. Of course, in other embodiments, the length of the hard tube section 21 may be set equal to the length of the rear cylinder 13 in the axial direction.

Furthermore, it will be appreciated that the instrument channel assembly is typically disposed throughout the insertion portion, and that the length of the hard tube segment 21 should not exceed the first bend section of the bend portion in order to avoid affecting the bending performance of the bend portion in the insertion portion. For example, in one example provided in the present application, as shown in fig. 8, the bending portion includes a snake bone 31, the snake bone 31 includes a plurality of joint rings 311 sequentially connected along an axial direction, the snake bone 31 is sleeved outside the forceps channel tube 2, and a joint K between the hard tube section 21 and the soft tube section 22 is located in a middle portion of the foremost joint ring 311, so that bending capability of the snake bone 31 is not affected due to arrangement of the hard tube section 21, and normal bending can be performed between the foremost joint ring 311 and the second joint ring 311, and implementation of bending operation of the endoscope insertion portion 5 is not affected.

Further, as shown in fig. 8, the front end surface and the positioning surface 121 of the pipe clamp 2 are planes perpendicular to the axial direction, so that the pipe clamp is convenient to process and the bonding degree of the front end surface and the positioning surface can be ensured. Of course, in other embodiments, the locating surface 121 may be arcuate or otherwise shaped.

In the instrument channel assembly in the above embodiment, the contact position of the adapter tube 1 and the forceps channel tube 2 is not perpendicular to the axial end surface step in the channel formed after the adapter tube 1 is connected with the forceps channel tube 2, the puncture needle 9 can be guided by means of the inclined transition surface 122, the front end of the forceps channel tube 2 is a hard tube segment 21, deformation is not easy to occur, the puncture needle 9 is stretched into the instrument channel 43 in clinic, and the clamping feeling can be weakened or eliminated.

In a third embodiment of the instrument channel assembly provided in the present application, as shown in fig. 9, the adapter tube 1 is partially embedded in the forceps channel tube 2, and one end of the adapter tube 1 embedded in the forceps channel tube 2 is formed with a guiding inclined surface 14 inclined toward the extending direction of the treatment instrument, specifically, a trumpet-shaped surface with an inner diameter gradually expanding toward the rear side is formed to guide the treatment instrument to extend into the adapter tube 1 from the inner wall of the forceps channel tube 2. The caliper tube 2 includes a hard tube section 21 and a soft tube section 22 connected in order from the front end to the rear end. Wherein the hard pipe section 21 is fixedly connected with the adapter tube 1, specifically, the rear end surface of the hard pipe section 21 is positioned at the rear side of the rear end surface of the adapter tube 1.

Wherein preferably the inclination angle X of the guiding ramp 14 is greater than or equal to 45 °. The "inclination angle X" refers to an angle at which the guide slope 14 is inclined in the extending direction with respect to a plane perpendicular to the axial direction, with the rear end of the guide slope 14 being the apex angle end. Based on the selection of the inclination angle X, the rear end of the connecting pipe 1 is relatively sharp, and the guiding capability can be ensured.

In this embodiment, the hard pipe section 21 is not easy to be pierced by the sharp end of the pipe connection 1, and at the same time, when the instrument with the planar front end stretches into the joint between the clamp pipe 2 and the pipe connection 1, the hard pipe section 21 is not easy to deform under force, and even if the rear end of the pipe connection 1 has a step surface, the instrument will not be exposed due to the deformation of the clamp pipe 2, so that the treatment instrument can enter the pipe connection 1 along the guiding inclined plane 14, and the occurrence of the clamping phenomenon is weakened.

In addition, the present application further provides an insertion portion 5, including a head end seat 41 and an instrument channel assembly, where the instrument channel assembly may be specifically an instrument channel assembly in any of the above embodiments, and the beneficial effects may also be referred to in the above embodiments correspondingly. Wherein, the head end seat 41 is provided with a head end seat channel 411. The adapter tube 1 in the instrument channel assembly communicates with the head end seat channel 411 and is fixedly connected to the head end seat 41.

Further, as shown in fig. 11, the rear half of the head end seat channel 411 is fixed to the outer side of the front cylinder 11 in a sleeved manner. Specifically, the head end seat 41 is made of plastic, has good insulation and voltage resistance, and can provide safety and security. Preferably, the outer wall of the front barrel 11 is adhesively secured to the inner wall of the head end seat channel 411. The connecting pipe 1 is used as a connecting piece of the clamp pipe 2 and the head end seat 41, so that the purposes of facilitating assembly, improving adhesive reliability and enhancing the assembly effect of the clamp pipe 2 can be achieved.

Further, the rear cylinder 13 is located outside the head end seat channel 411, and the rear cylinder 13 is located at the rear side of the head end seat 41, so that the processing difficulty of the head end seat channel 411 can be simplified, and the head end seat channel 411 is not required to accommodate the rear cylinder 13 with a larger size. Preferably, the front end surface of the rear cylinder 13 axially abuts against the head end seat 41, and the insertion depth of the adapter tube 1 into the head end seat channel 411 can be determined by means of the rear cylinder 13.

In addition, the present application also provides an endoscope, which may include, but is not limited to, an ultrasound endoscope, a gastroscope, a duodenoscope, a enteroscope, and the like. As one example, the endoscope may be an ultrasonic endoscope, which includes an insertion portion 5, an operation portion 6 connected to the insertion portion 5, a light guide portion 7 connected to the operation portion 6, and an ultrasonic connector 8 connected to the light guide portion 7, as shown in fig. 12. The insertion portion 5 includes an instrument channel assembly, and may specifically be the insertion portion 5 and the instrument channel assembly provided in any of the foregoing embodiments, and the beneficial effects may refer to the foregoing embodiments correspondingly.

The insertion portion 5 is a portion of the endoscope that enters the human body, and has an elongated structure. The insertion part 5 includes an insertion tube with graduations, a bending part 3 capable of swinging in different directions, and a hard head end part 4 for feeding back diagnostic information.

As shown in fig. 10, the head end 4 integrates functions of illumination, image transmission, water vapor transmission, ultrasonic transducer, forceps instrument manipulation and the like, and comprises a head end seat 41, an ultrasonic probe 42, an instrument channel assembly 43, a camera 44, an illumination window 45 and the like.

The head end seat 41 is a structural carrier for mounting other structures of the head end 4.

The ultrasound probe 42 contains an ultrasound transducer that can generate and receive ultrasound signals. The ultrasonic transducer can emit and receive ultrasonic waves, forms an ultrasonic image to provide deep lesion information of human digestive tracts and respiratory tracts, and takes biopsy through the puncture needle 9 to improve diagnosis and treatment accuracy.

The instrument channel assembly 43 specifically includes a structure in which the adapter tube 1 and the forceps channel tube 2 are connected, and an instrument is introduced from the operation section 6, passes through the channel, and protrudes from the head end seat channel 411. Preferably, the head end 4 further comprises a forceps lifter 46 to adjust the instrument extension direction.

The camera 44 receives an image sensor and converts the optical signal into an electrical signal. Preferably, the head end 4 may also include a water vapor nozzle 47 that may deliver water and/or air toward the camera 44 to clean the camera 44.

The illumination window 45 can emit illumination light to provide certain brightness during diagnosis and treatment.

The bending part 3 comprises a bendable snake bone 31, which provides operability for endoscopic diagnosis and treatment. The snake bone 31 is specifically a metal structure.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" is two or more.

The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The instrument channel assembly, the insertion portion and the endoscope provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the above examples being provided only to facilitate understanding of the structure of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. An instrument channel assembly for guiding a treatment instrument out of a head end seat (41) of an endoscope, characterized in that the instrument channel assembly comprises a fixedly connected adapter tube (1) and a forceps channel tube (2), and an interference surface preventing the treatment instrument from extending from the forceps channel tube (2) into the adapter tube (1) does not exist at the joint of the forceps channel tube (2) and the adapter tube (1).

2. The instrument channel assembly according to claim 1, characterized in that the adapter tube (1) comprises a front cylinder (11) and a rear cylinder (13), the inner diameter of the front cylinder (11) is smaller than the inner diameter of the rear cylinder (13), a positioning surface (121) is formed at the joint of the front cylinder (11) and the rear cylinder (13), the forceps channel tube (2) is embedded in the rear cylinder (13), and the front end of the forceps channel tube (2) is abutted against the positioning surface (121);

wherein, in the radial direction, the width of the pipe wall of the forceps channel pipe (2) is larger than or equal to the width of the positioning surface (121).

3. Instrument channel assembly according to claim 2, characterized in that the inner diameter of the forceps channel tube (2) is smaller than or equal to the inner diameter of the front cylinder (11).

4. The instrument channel assembly according to claim 2, characterized in that in radial direction the inner edge (B) of the positioning surface (121) is located outside the inner wall of the front cylinder (11); the connecting part of the front cylinder body (11) and the rear cylinder body (13) is also provided with a transition surface (122) which is obliquely arranged, and the transition surface (122) is connected with the inner wall of the front cylinder body (11) and the positioning surface (121).

5. The instrument channel assembly of claim 4, wherein an extension of an inner wall of said forceps channel tube (2) intersects said transition surface (122).

6. The instrument channel assembly of claim 4, wherein said transition surface (122) comprises a rounded surface and/or a chamfered surface.

7. An instrument channel assembly according to any one of claims 2-6, wherein the forceps channel tube (2) comprises a hard tube section (21) and a soft tube section (22) connected in sequence from the front end to the rear end, the hard tube section (21) being fixedly connected to the adapter tube (1).

8. The instrument channel assembly of claim 7, wherein the length of the rigid tube section (21) is greater than or equal to the length of the rear barrel (13) in the axial direction.

9. The instrument channel assembly according to claim 1, wherein the adapter tube (1) is partially embedded within the forceps channel tube (2), and wherein an end of the adapter tube (1) embedded in the forceps channel tube (2) is formed with a guide slope (14) inclined toward the protruding direction of the treatment instrument to guide the treatment instrument to protrude from the inner wall of the forceps channel tube (2) into the adapter tube (1); the clamp pipe (2) comprises a hard pipe section (21) and a soft pipe section (22) which are sequentially connected from the front end to the rear end, and the hard pipe section (21) is fixedly connected with the connecting pipe (1).

10. The instrument channel assembly of claim 9 wherein the angle of inclination of said guide ramp (14) is greater than or equal to 45 °.

11. An insertion portion, comprising:

a head end seat (41) through which a head end seat channel (411) is provided;

the instrument channel assembly of any of claims 1-10, wherein a nipple (1) of the instrument channel assembly communicates with the head end seat channel (411) and is fixedly connected with the head end seat (41).

12. An endoscope comprising the insertion portion according to claim 11.