CN119073871B - Insertion component and endoscope - Google Patents

Abstract

The invention provides an insertion part component and an endoscope, which relate to the technical field of endoscopes and comprise a central line; the device comprises a tube body, a return passage, a switch assembly and a switch assembly, wherein the tube body extends from a proximal end to a distal end along a central line, the return passage extends from the distal end of the tube body to the proximal end to the outer surface of the tube body to form a return port, the switch assembly is connected with the tube body and is configured to be capable of being switched between a first state and a second state relative to the tube body, the switch assembly seals the return port in the first state, the switch assembly exposes the return port in the second state, the switch assembly comprises a main bag body, an inner passage is arranged on the main bag body, an independent cavity passage is formed between the inner passage and an inner cavity of the main bag body, an inlet of the inner passage is used for being communicated with the outside, and an outlet of the inner passage is connected with the return port. Compared with the prior art, the invention has the advantages of avoiding the backflow port from being blocked by mucus or impurities in the cavity in the insertion process, and effectively avoiding the backflow port from rubbing the cavity.

Description

Insertion part component and endoscope

Technical Field

The present invention relates to the technical field of endoscopes, and in particular, to an insertion portion member and an endoscope.

Background

During endoscopic procedures, it is often necessary to inject saline or other fluid into the surgical site to clean the field of view, expand the space, or maintain a suitable surgical environment. In order to prevent liquid accumulation, keep the operation visual field clear or protect the cavity, the endoscope can timely discharge redundant liquid or flushing liquid out of the body by arranging a reflux channel.

In the related art, the return port of the return channel is located at the front end seat of the endoscope, and in particular, the return port of the return channel is designed on the peripheral wall of the front end seat or the distal end face of the front end seat in order to efficiently suck and return the excessive liquid. In practice, however, the return port is easily blocked by the airway mucus or other impurities before the endoscope insertion portion is inserted into the body cavity at a predetermined position.

Disclosure of Invention

The application provides an insertion part component and an endoscope, which aim to solve the problem that a reflux port is easily blocked by cavity mucus or other impurities before an endoscope insertion part is inserted into a preset position of a body cavity.

In a first aspect, the present application provides an insert member, which adopts the following technical scheme:

An insert member for use with an endoscope, comprising a centerline;

A tube extending along the centerline from a proximal end to a distal end;

A return channel extending proximally along the distal end of the tube to an outer surface of the tube to form a return port;

a switch assembly connected with the tube, the switch assembly configured to be switchable relative to the tube between a first state and a second state, wherein:

in the first state, the switch assembly closes the return port;

In the second state, the switch assembly exposes the return port.

Preferably, the return port is located on the outer peripheral wall of the tube.

Preferably, the switch assembly includes a main bag body, an inner channel is configured on the main bag body, an independent channel is formed between the inner channel and an inner cavity of the main bag body, an inlet of the inner channel is used for being communicated with the outside, and an outlet of the inner channel is connected with the backflow port, wherein:

In the first state, the primary bladder collapses and causes the inner channel to collapse at least at its inlet to close the return port;

In the second state, the primary bladder expands and causes the inner passage to expand outwardly thereof to open the return port.

Preferably, the tube body extends from the proximal end to the distal end and is provided with a flow channel which is communicated with the main bag body and can charge or discharge fluid medium into or from the main bag body so as to expand or collapse the main bag body;

And/or the number of the main bag bodies is one, and at least part of the main bag bodies are circumferentially wrapped and arranged on the peripheral wall of the pipe body;

Or the number of the main bag bodies is a plurality of the main bag bodies and the main bag bodies are uniformly distributed along the circumferential direction of the pipe body;

or, the number of the main bag bodies is multiple and the main bag bodies are distributed along the length direction of the pipe body.

Preferably, the diameter of the inner channel decreases gradually from the distal end to the proximal end.

Preferably, the tube body is formed by sequentially connecting a passive bending section, an active bending section and a front end seat from a proximal end to a distal end, and the main bag body is positioned on the peripheral wall of at least one of the front end seat, the active bending section and the passive bending section.

Preferably, the primary capsule is located on the peripheral wall of the active bending section, wherein:

The inlet of the inner channel is disposed closer to the distal end of the active bending section than the proximal end of the active bending section;

And/or, with the primary bladder in inflation, the inlet of the inner channel is inclined or forward of the front seat;

And/or, with the main bladder in inflation, the inlet of the inner channel is between the front seat and the maximum inflation site of the peripheral wall of the main bladder;

And/or, in the case that the main bag body is inflated, a projection contour of the shortest point of the inlet of the inner channel from the central line along the axial direction of the front end seat is close to a projection contour of the outer peripheral wall of the front end seat along the axial direction;

And/or, in the event that the main bladder is in a collapsed condition, the projected profile of the peripheral wall of the main bladder along the direction of the front end seat is located within or flush with the peripheral wall of the front end seat;

and/or the periphery of the inlet of the inner channel is provided with a guiding inclined plane which gradually reduces towards the outlet of the inner channel.

Preferably, the proximal end and the distal end of the main bag body are respectively and fixedly sleeved with a first ring body, and the distal end and the proximal end of the main bag body are respectively and fixedly pressed on the peripheral wall of the pipe body by the first ring body.

Preferably, the inner cavity of the main bag body is connected with the peripheral wall of the inner channel through fiber wires, wherein:

the filaments are in a relaxed state with the primary bladder in a collapsed condition;

The filaments are in a tensioned state with the primary balloon in inflation.

In a second aspect, the present application provides an endoscope, which adopts the following technical scheme:

An endoscope, comprising a handle and an insertion part member according to the above technical solution, wherein the handle is connected with the insertion part member.

The invention has the following advantages and beneficial effects:

The invention prevents the backflow port from being blocked by mucus or impurities in the cavity in the inserting process by using the switch component to close the backflow port in the process of inserting the endoscope into the body cavity. Meanwhile, the structure can also avoid scraping and rubbing the cavity channel by the reflux port, thereby reducing the damage to the wall of the body cavity. In operation, the return port is only exposed after reaching the predetermined position, ensuring its normal operation. This design effectively promotes the smoothness of endoscope insertion.

Drawings

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

Fig. 1 is a schematic view of an overall structure of an endoscope.

Fig. 2 is a schematic structural view intended to show the main capsule in an active bending section and in a first state.

Fig. 3 is a schematic structural view intended to show the main bladder inflated and in a second state and mounted adjacent to the front end seat.

Fig. 4 is a schematic diagram intended to show the structure of the inner channel and the return channel.

Fig. 5 is a schematic view intended to show the internal structure of the main capsule after shrinkage.

Fig. 6 is a schematic view intended to show the internal structure of the main bladder after inflation.

Fig. 7 is a schematic view of an internal structure intended to show that the internal passage is provided with a pair in the main body.

Fig. 8 is an enlarged view of a portion a in fig. 7.

Fig. 9 is a schematic structural view intended to show that the main bladder is provided with a plurality of portions in the circumferential direction of the active bending section.

Fig. 10 is a schematic view intended to show the structure of the plurality of main capsules after inflation.

Marked in the figure as:

1. 10 parts of a pipe body, a central line, 11 parts of a front end seat, 12 parts of an active bending section, 121 parts of a snake bone joint, 1211 parts of an avoidance gap, 122 parts of a skin and 13 parts of a passive bending section;

2. switch assembly, 21, main capsule, 211, inner channel, 2111, inlet, 2112, outlet, 22, first state, 23, second state, 213, guiding slope;

3. 31, return port;

4. A flow passage;

5. a first ring body;

6. fiber yarn 61, relaxed state 62, tensioned state;

7. a handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

An insertion portion member and an endoscope provided by the embodiment of the present application will be described in detail below with reference to fig. 1 to 10 by way of specific embodiments and application scenarios thereof.

Referring to fig. 1 and 2, an insertion part member, which is applied to an endoscope, includes a center line 10, the center line 10 being the axis of the insertion part, and a tube body 1 extending from a proximal end to a distal end along the center line 10. The tube 1 has a certain flexibility and rigidity to adapt to the insertion and operation requirements of the endoscope in the body cavity. The proximal end of the tube 1 is connected to the handle 7 portion of the endoscope for transmitting the operator's operating force, while the distal end enters the body cavity by a curved or straight configuration. It is noted that the tube body 1 can be used alone as an insertion member, is suitable for different types of endoscope designs, and can be modularly configured or replaced according to specific requirements to meet different operation requirements and body cavity structures.

The backflow channel 3 extends along the distal end of the tube body 1 to the proximal end and leads to the outer surface of the tube body 1, which may be either the outer wall of the tube body 1 or the front end surface of the tube body 1, so as to form a backflow port 31, and the backflow channel 3 is provided as a hose and extends along the interior of the tube body 1. The position of the return port 31 may be flexibly set, and may be located on the front end surface of the tube 1 or may be located on the peripheral side wall of the tube 1. This design allows the position of the return port 31 to be adjusted according to the actual use requirements to optimize the discharge path of the liquid, improve the return efficiency, and effectively avoid clogging or interference with the return channel 3 during insertion and operation, ensuring the functionality of the device and the smoothness of operation.

Referring to fig. 2 and 3, the switch assembly 2 is connected to the tube 1 and is configured to be switchable between a first state 22 and a second state 23. In the first state 22, the switch assembly 2 is in a closed position to seal the backflow port 31 and prevent liquid, mucus or other impurities in the body cavity from entering the backflow channel 3, so that blockage or pollution is effectively avoided, and in the second state 23, the switch assembly 2 is switched to an open position, the backflow port 31 is exposed, normal operation of the backflow channel 3 is allowed, and smooth discharge of the liquid is realized. Through this design, the switch assembly 2 can flexibly control the opening and closing of the backflow port 31, ensure that the backflow port 31 is prevented from being blocked in the insertion process, and quickly recover the backflow function when needed, thereby improving the safety and efficiency of the endoscope operation.

One of the specific reasons for clogging of the return channel 3 is explained below, mainly because the distal end insertion section member of the endoscope does not normally turn on the negative pressure suction function during the entry into the body cavity, but turns on the negative pressure suction after insertion to a specified examination position to suck the liquid in the return channel 3. Since the suction function is not turned on during the insertion process for some period of time, liquid, mucus or other impurities in the body cavity are liable to accumulate at the position of the reflux port 31 of the reflux passage 3, thereby causing blockage, which affects the subsequent normal suction of the reflux passage.

As an alternative embodiment, when the return port 31 is located on the front end surface of the tube body 1, that is, the front end surface of the front end seat 11, the switch assembly 2 may be a micro fluid valve, and may be directly installed at the return port 31. By this design, the microfluidic valve can precisely control the opening and closing of the return port 31. For ease of operation, a switch may be provided at the handle 7, and an operator may remotely operate the opening or closing of the microfluidic valve by means of a control device on the handle 7. The structure not only simplifies the operation flow, but also ensures that the backflow port 31 at the front end of the insertion part is effectively closed and opened, simultaneously maintains the compactness of the structure of the tube body 1, and improves the flexibility and efficiency of the operation of the endoscope.

As an alternative embodiment, referring to fig. 4 and 5, the switch assembly 2 includes a main body 21, and an inner passage 211 is provided in the main body 21, and the inner passage 211 is made of the same material as the main body 21 but has a material hardness higher than that of the main body 21. This design ensures that the inner channel 211 is not compressed first after the main bladder 21 is filled with fluid medium, but remains clear as the main bladder 21 rapidly expands and normally expands. The inner channel 211 and the inner cavity of the main bag body 21 are mutually independent to form two independent cavities, an inlet 2111 of the inner channel 211 is communicated with the outside, and an outlet 2112 is connected to the backflow port 31. When the main bladder 21 is filled with fluid medium, the main bladder 21 expands, causing the inner passage 211 to open and communicate with the return passage 3.

Conversely, when fluid medium is withdrawn, the main bladder 21 collapses, and the inner passage 211 collapses, closing the return port 31. In the first state 22, the main bladder 21 is in a collapsed state, causing the inner passage 211 to collapse at its inlet 2111, the return port 31 being closed, and in the second state 23, the main bladder 21 is inflated, the inner passage 211 being expanded outwardly, thereby conducting the return port 31, ensuring a normal passage of fluid. The design makes the working state of the switch assembly 2 flexible and controllable, can effectively prevent the backflow channel 3 from being misled when not needed, and simultaneously ensures that the backflow channel 3 is quickly opened or closed during operation.

In addition, the surface of the main bag body 21 has high sliding property and extremely low damping, and the characteristic greatly reduces friction force in the inserting process, so that the endoscope can be inserted into a body cavity more smoothly and stably. Through this optimal design, main bag body 21 not only can effectively cooperate opening and closing of backward flow port 31, has still promoted the holistic operating convenience of insert part, has reduced friction and the potential damage to the body cavity wall, has further improved the security and the use experience of endoscope.

As an alternative embodiment, to further enhance the lubricity of the surface of the main capsule 21, the surface of the main capsule 21 may be coated with a lubricating layer, such as polytetrafluoroethylene. The lubricating layer can obviously reduce the friction coefficient, so that the insertion part is smoother in the operation process, and the friction force between the insertion part and the body cavity wall is reduced during insertion. The design not only improves the operation flexibility of the endoscope, but also further reduces the damage risk to body cavity tissues and improves the use comfort and reliability of the device.

As an alternative embodiment, the tube 1 is provided with a flow channel 4 extending from the proximal end to the distal end, which flow channel 4 may be made of a relatively thin hose and is in communication with the main bladder 21 for filling or discharging the fluid medium into or out of the main bladder 21, thereby effecting inflation or deflation of the main bladder 21. The fluid medium may be purified water, air, or other suitable fluid medium. A miniature hydraulic pump is provided in the housing of the endoscope, through which a fluid medium is pumped into the main balloon 21. When in operation, an operator can conveniently control the working state of the micro hydraulic pump only through a switch on the endoscope shell, thereby realizing accurate control on the main bag body 21. The design ensures that the injection and the discharge of the fluid medium are more flexible, simplifies the operation flow, and improves the use efficiency and the operability of the endoscope.

As an alternative embodiment, referring to fig. 2, the number of main capsules 21 is one and at least partially wrapped around the outer peripheral wall of the tube 1. After the main bag body 21 is completely or partially wrapped on the peripheral wall of the pipe body 1, the main bag body can play a role of expanding blood vessels or cavities when being inflated or filled, so that a smoother channel is provided for sucking and refluxing liquid. The design of complete parcel is applicable to the scene that needs great struts, and partial circumferential parcel then can carry out nimble setting according to specific demand to adapt to the body cavity structure in the different operational environment. The design not only enhances the adaptability of the endoscope, but also further optimizes the effect of liquid reflux.

As an alternative embodiment, as shown with reference to fig. 9 and 10, the number of main capsules 21 is plural and uniformly arranged in the circumferential direction of the tube body 1. By the aid of the design, a more balanced supporting effect can be achieved during expansion, the blood vessel or the body cavity can be effectively expanded, and smoothness of the liquid reflux channel 3 is further improved. The uniform distribution of the plurality of primary balloons 21 also provides more accurate positioning and support as needed, avoids damage to tissue due to excessive local pressure, and enhances the overall stability and operational flexibility of the endoscope.

As an alternative embodiment, the number of the main capsules 21 is plural, and are sequentially arranged along the length direction of the tube 1. This design can provide multiple points of support at different locations of the body 1, effectively distracting the vessel or body cavity when needed, thereby optimizing the patency of the return channel 3. The arrangement along the length direction is beneficial to dispersing pressure, avoiding overlarge local stress on a single position and reducing damage to surrounding tissues. In addition, the arrangement mode improves the operation flexibility and stability of the endoscope in complex body cavity environments, so that the endoscope can better adapt to the operation requirements of different depths and structures.

As an alternative embodiment, referring to FIG. 4, the diameter of the inner channel 211 decreases gradually from the distal end to the proximal end. The design effectively optimizes the flow characteristic of the fluid in the channel, promotes the fluid to gradually accelerate when passing through, and is beneficial to improving the backflow efficiency. Meanwhile, the gradually-reduced channel structure is beneficial to reducing the turbulence phenomenon of the fluid and ensuring the flow stability. By such a tapered design, the inner channel 211 can better accommodate the flow requirements of the fluid, enhancing the accuracy of control of the fluid reflux during endoscope operation.

As an alternative embodiment, referring to fig. 1 and 2, it should be noted that in the endoscope insertion portion of the present embodiment, the tube body 1 is formed by sequentially connecting a passive bending section 13, an active bending section 12, and a front end seat 11 from the proximal end to the distal end. The main bag body 21 is located on at least one of the front end seat 11, the active bending section 12 or the passive bending section 13. Specifically, the main bladder 21 may be located on the front end seat 11, on the active bending section 12 or on the passive bending section 13. In addition, the main bag body 21 may be located on the front end seat 11 and the active bending section 12, or on the active bending section 12 and the passive bending section 13, or may even cover all three. In the case of a plurality of main capsules 21, it is worth emphasizing that the main capsules 21 may avoid the active bending section 12, while being located on the front seat 11 and the passive bending section 13. This arrangement ensures that the main balloon 21 can be set according to specific needs, enhancing flexibility and adaptability of the insertion portion in complex body cavity environments.

As an alternative embodiment, referring to fig. 2 and 3, the main bladder 21 is located on the outer peripheral wall of the active bending section 12, in this embodiment, the active bending section 12 is formed by hinging the snake segments 121 to each other, and controlling the bending of the snake segments 121 by the traction rope, the outer portion of the snake segments 121 is covered with the skin 122, and in other embodiments, the active bending section 12 may be made of other cut whole bending segments or snake segments 121 in other forms.

It should be emphasized that the main bag body 21 can play a role of the skin 122, the skin 122 is not required to be additionally covered at the position of the main bag body 21, the whole structure is simplified, meanwhile, referring to fig. 8, an avoidance gap 1211 for the backflow channel 3 to pass through is formed on the snake bone joint 121, the avoidance gap 1211 can be completed through stamping forming, and the installation of the backflow channel 3 and the normal rotation of the snake bone joint 121 can be avoided.

Wherein the inlet 2111 of the inner channel 211 is disposed on a side closer to the front seat 11 than the proximal end of the active bending section 12. This design allows the inlet 2111 of the inner channel 211 to be positioned adjacent the front end of the front end seat 11, thereby optimizing the pumping effect of the liquid. Positioning the inlet 2111 near the front seat 11 not only increases the efficiency of liquid flow into the inner channel 211, but also enhances the ability to quickly draw liquid, ensuring smoother liquid return during operation.

As an alternative embodiment, the inlet 2111 of the inner channel 211 is inclined or directed forward of the front seat 11 when the main bladder 21 is inflated. This design ensures a smoother flow of liquid into the inner channel 211, improving the pumping efficiency. At the same time, the angled inlet 2111 angle helps to direct liquid toward the front end seat 11, reducing flow resistance, ensuring a faster liquid return during operation.

As an alternative embodiment, the inlet 2111 of the inner channel 211 is located between the front seat 11 and the maximum inflation peripheral wall of the main bladder 21 when the main bladder 21 is inflated. This design can effectively utilize the expansion space of the main bag body 21, ensure that the liquid flows into the inner channel 211 more smoothly, and thus improve the suction efficiency. By placing inlet 2111 in this particular location, flow resistance can be minimized, ensuring that a quick and stable liquid return is achieved during operation.

As an alternative embodiment, the projected contour of the inlet 2111 of the inner channel 211 in the direction of the front seat 11 from the shortest point of the center line 10 is close to the outer peripheral wall of the front seat 11 when the main bag body 21 is inflated. This design ensures a close relationship between the inlet 2111 of the inner channel 211 and the front end seat 11, thereby optimizing the flow path of the liquid and improving the suction efficiency. By positioning the inlet 2111 so close to the outer peripheral wall, resistance to liquid flow can be effectively reduced.

As an alternative embodiment, the projected contour of the peripheral wall of the main bladder 21 in the direction of the front end seat 11 is located inside the peripheral wall of the front end seat 11 or flush with the peripheral wall of the front end seat 11 when the main bladder 21 is in the collapsed state. This design ensures that the main bladder 21 does not protrude beyond the outer perimeter of the front seat 11 when collapsed, thereby avoiding potential interference with surrounding tissue.

As an alternative embodiment, the periphery of the inlet 2111 of the inner channel 211 is provided with a guiding ramp 213 that tapers towards the outlet 2112 of the inner channel 211. This design can effectively guide fluid smoothly into the inner channel 211, reduce flow resistance, and ensure that the fluid obtains better flow direction and speed when entering the inner channel 211 through the gradually shrinking guide inclined plane 213, thereby improving suction efficiency.

It is noted that the inlet 2111 of the inner channel 211 may be determined according to specific requirements, i.e. the inlet 2111 of the inner channel 211 may be located at any position of the outer wall of the main bladder 21.

As an alternative embodiment, the proximal end and the distal end of the main balloon 21 are respectively fixed by the first ring 5, and the first ring 5 has a ring structure, and the inner diameter of the first ring is matched with the outer diameter of the main balloon 21, so as to ensure close fit when the first ring is sleeved. The connection between the main bag body 21 and the first ring body 5 can be realized by adopting a glue bonding mode, glue is uniformly smeared on the contact surface to form a firm bonding effect, or the main bag body 21 and the first ring body 5 form mechanical fit through tight abutting, and the fixation is realized through contact pressure. In addition, the first ring body 5 can be designed into an integrally formed structure according to actual needs.

In this embodiment, the outer diameter of the first ring body 5 is slightly greater than or equal to the outer diameter of the main bladder 21, and the outer peripheral wall thereof remains coaxial with the outer peripheral walls of the front end seat 11 and the skin 122, ensuring a structurally seamless connection thereof. The fixing mode can adopt glue bonding to increase stability, or can also adopt abutting or mechanical matching (such as a buckle and a screw) fixing to ensure that the first ring body 5 cannot be separated from the main bag body 21 or related parts in the working state. The two ends of the first ring body 5 are respectively fixed with the front end seat 11 and the outer peripheral wall of the skin 122 in a glue bonding or mechanical fastening mode, so that the stability and durability of the structure are ensured;

The first ring body 5 not only plays a role of limiting and guiding, ensures that the main bag body 21 develops along a preset direction when expanding, but also can effectively prevent the main bag body 21 from structural damage caused by over expansion. To further increase its function, the peripheral wall of the first ring body 5 and the peripheral wall of the tube body 1 may be designed as a flush, protruding or recessed structural arrangement. Flush designs reduce drag, protruding designs can enhance reliability of fixation, while recessed designs can provide additional space to accommodate other ancillary structures or components, increasing the variety and functionality of the overall structure.

As an alternative embodiment, referring to fig. 5 and 6, the connection between the inner cavity of the main balloon 21 and the outer peripheral wall of the inner channel 211 is made by the filaments 6. The fiber yarn 6 can be made of high-strength stretch-proof materials, such as polyamide fibers, kevlar fibers and the like, has good tensile strength and flexibility, and can adapt to different stress conditions in a collapsed and expanded state. Specifically, one end of the filament 6 is fixed to the inner surface of the inner cavity of the main bag body 21 by bonding, sewing or winding, and the other end is fixed to the outer peripheral wall of the inner channel 211 by bonding or mechanical locking. The number and distribution density of the connection points can be adjusted as needed to ensure stability in different states of the main bladder 21. For example, the filaments 6 may be evenly distributed along the circumference of the inner channel 211, forming a multi-point connection, providing better force uniformity.

When the main bladder 21 is in a collapsed state, the filaments 6 are in a relaxed state 61, exhibiting no stress or slight tension. At this time, the fiber wires 6do not apply any additional constraint force to the main bag body 21 and the inner channel 211, so that the main bag body 21 can be free to collapse, the stress concentration of the material is reduced, and the service life of the material is prolonged. While the filaments 6 are gradually tensioned when the main balloon 21 is inflated. With the gradual expansion of the main bag body 21, the fiber filaments 6 are converted from the loose state 61 to the tension state 62, the tension of the fiber filaments 6 is increased, a certain restraining force is provided, the main bag body 21 is prevented from being excessively expanded in the expansion process, and the limiting effect on the structure is achieved. In addition, the fiber wires 6 can guide the expansion direction of the main bag body 21 to a certain extent under the tensioning state 62, so that the stable and controllable expansion process is ensured, and the structural instability or damage caused by uneven expansion is prevented.

In a further embodiment, an endoscope comprises a handle 7 and an insert member of the above-described solution, both of which are fixedly or detachably connected by means of a specific connection structure. The handle 7 is provided with a control device and a transmission mechanism inside and with an operating button or a deflector rod for controlling the movement of the insertion part. The insert member is of flexible or semi-rigid construction, and the distal end of the insert member may be provided with a camera, light source or sampler, etc., which is capable of flexible bending and rotation under operation of the handle 7 to achieve accurate operation.

In addition, it should be emphasized that the endoscope in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a nasoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the types of the endoscope in the embodiments of the present application are not particularly limited.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention.

Claims (8)

1. An insertion portion member for use with an endoscope, comprising:

A centre line (10);

-a tube body (1), the tube body (1) extending along the centre line (10) from a proximal end to a distal end;

-a return channel (3), the return channel (3) extending proximally along the distal end of the tube (1) to an outer surface of the tube (1) to form a return port (31);

-a switch assembly (2), the switch assembly (2) being connected with the tube (1), the switch assembly (2) being configured to be switchable between a first state (22) and a second state (23) with respect to the tube (1), wherein:

in the first state (22), the switch assembly (2) closes the return port (31);

-in the second state (23), the switch assembly (2) exposes the return port (31);

The reflux port (31) is positioned on the outer peripheral wall of the pipe body (1);

The switch assembly (2) comprises a main bag body (21), wherein an inner channel (211) is configured on the main bag body (21), an independent cavity channel is formed between the inner channel (211) and the inner cavity of the main bag body (21), an inlet (2111) of the inner channel (211) is used for being communicated with the outside, and an outlet (2112) of the inner channel (211) is connected to the backflow port (31), wherein:

in the first state (22), the main bladder (21) collapses and causes the inner channel (211) to collapse at least at its inlet (2111) to close the return port (31);

in the second state (23), the main bladder (21) expands and causes the inner passage (211) to open outwardly to open the return port (31).

2. An insert member according to claim 1, wherein the tube body (1) is provided with a flow channel (4) extending from a proximal end to a distal end, the flow channel (4) being in communication with the main bladder (21) and being capable of filling or discharging a fluid medium into or out of the main bladder (21) to expand or collapse the main bladder (21);

and/or the number of the main bag bodies (21) is one, and at least part of the main bag bodies are circumferentially wrapped and arranged on the peripheral wall of the pipe body (1);

Or the number of the main bag bodies (21) is a plurality of the main bag bodies and the main bag bodies are uniformly distributed along the circumferential direction of the pipe body (1);

Or, the number of the main bag bodies (21) is a plurality of the main bag bodies and the main bag bodies are distributed along the length direction of the pipe body (1).

3. An insert member according to claim 1, wherein the diameter of said inner channel (211) decreases gradually from the distal end to the proximal end.

4. An insert member according to claim 3, wherein said tube body (1) is formed by sequentially connecting a passive bending section (13), an active bending section (12) and a front end seat (11) from a proximal end to a distal end, said main capsule (21) being located on an outer peripheral wall of at least one of said front end seat (11), said active bending section (12) and said passive bending section (13).

5. An insert member according to claim 4, wherein the main bladder (21) is located on the peripheral wall of the active bending section (12), wherein:

An inlet (2111) of the inner channel (211) is disposed closer to a distal end of the active curved section (12) than to a proximal end of the active curved section (12);

and/or, with the main bladder (21) in inflation, the inlet (2111) of the inner channel (211) is inclined or directed forward of the front seat (11);

and/or, with the main capsule (21) in inflation, the inlet (2111) of the inner channel (211) is between the front seat (11) and the maximum inflation site of the peripheral wall of the main capsule (21);

And/or, in the case where the main bag body (21) is inflated, a projection contour of the shortest point of the inlet (2111) of the inner passage (211) from the center line (10) in the axial direction of the front end seat (11) is close to a projection contour of the outer peripheral wall of the front end seat (11) in the axial direction;

And/or, in the event of the main bladder (21) being collapsed, the projection profile of the peripheral wall of the main bladder (21) in the direction of the front end seat (11) is located within the peripheral wall of the front end seat (11) or flush with the peripheral wall of the front end seat (11);

And/or, the periphery of the inlet (2111) of the inner channel (211) is provided with a guiding slope (213) that gradually tapers towards the outlet (2112) of the inner channel (211).

6. An insert member according to claim 1, wherein the proximal and distal ends of the main capsule (21) are fixedly sleeved with first ring bodies (5), respectively, the first ring bodies (5) press-fasten the distal and proximal ends of the main capsule (21) to the outer peripheral wall of the tube body (1), respectively.

7. An insert member according to claim 1, wherein the inner lumen of the main balloon (21) is connected to the outer peripheral wall of the inner channel (211) by means of filaments (6), wherein:

-the filaments (6) are in a relaxed state (61) with the main balloon (21) in a collapsed condition;

the filaments (6) are in a tensioned state (62) with the main balloon (21) in inflation.

8. An endoscope, characterized by comprising a handle (7) and an insert member according to any of claims 1-7, said handle (7) being connected to said insert member.