CN217723455U - Sheath assembly and endoscope system - Google Patents

Abstract

The embodiment of the application provides a sheath assembly and an endoscope system, wherein the sheath assembly comprises a sheath and a light guide unit, the sheath comprises a light guide cavity channel, an image cavity channel and a working cavity channel for fluid or surgical instruments to pass through, an image tube of an endoscope can be inserted into the image cavity channel in a pluggable manner, the far end of the image cavity channel is a closed end, and the far end of the working cavity channel is open; the distal end of the sheath can controllably bend or reposition following the distal end of the visual tube; the light guide unit is arranged in the light guide cavity channel to provide illumination for the visual field of the image tube. The sheath assembly can prevent the video tube from contacting with the internal tissue of the patient in the using process, and the sheath assembly is pulled out from the endoscope after the endoscope is used, so that secondary use is avoided, and cross infection is avoided; the light of the light guide unit can not enter the inner wall surface of the visual cavity channel around the image sensor basically, and the inner wall surface around the image sensor can not reflect light basically in the far-end bending process of the visual tube.

Description

Sheath assembly and endoscope system

Technical Field

The application relates to the technical field of medical equipment, in particular to a sheath assembly and an endoscope system.

Background

Endoscopes are various in types, such as enteroscopes, laryngoscopes, gastroscopes, bronchoscopes, hysteroscopes and the like, and can directly reach focuses as conventional examination tools and interventional operation tools. The endoscope is a reusable instrument and directly contacts with the internal tissue of a patient, so strict disinfection needs to be carried out, a certain time is needed for strict disinfection, the operation flow of disinfection is relatively more, the disinfection cost is relatively increased, the requirement on the anti-soaking performance of the video tube extending into the body of the patient by the endoscope is also high, and even if the requirement is high, certain cross infection risks also exist.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a disposable sheath assembly and an endoscope system to reduce the risk of cross-infection during endoscope reuse.

In order to achieve the above object, an embodiment of the present invention provides a sheath assembly for an endoscope, the sheath assembly including a sheath and a light guide unit, the sheath including a light guide channel, an image channel, and a working channel for fluid or surgical instrument to pass through, an image tube of the endoscope being insertable into and removable from the image channel, a distal end of the image channel being a closed end, and a distal end of the working channel being open; the distal end of the sheath can controllably bend or reposition following the distal end of the viewing tube; the light guide unit is arranged in the light guide cavity channel to provide illumination for the visual field of the visual tube.

In some embodiments, the light guide unit is pre-embedded in the light guide cavity.

In some embodiments, the sheath includes a sheath body and an adaptor connected to a proximal end of the sheath body, the adaptor proximal end is configured to be detachably connected to a portion of the endoscope, and the light guide channel, the image channel, and the working channel all extend through the adaptor.

In some embodiments, the distal end of the adaptor is sleeved and fixedly connected with the sheath body.

In some embodiments, the sheath assembly includes a tube connector attached to a lateral side of the adaptor, the tube connector including a main channel for passage of fluid and a branch channel for passage of a surgical instrument, the main channel and the branch channel communicating, a distal end of the main channel being connected to an inlet of the working channel.

In some embodiments, the trunk channel and the working channel in the adaptor are arranged along a common line.

In some embodiments, the endoscope system comprises a plug for plugging the branch channel, and the plug is arranged in the inlet of the branch channel in a pluggable manner.

In some embodiments, the light guide unit is a plastic optical fiber, the plastic optical fiber is pre-embedded in the sheath, and a proximal end surface of the plastic optical fiber is exposed at a proximal end portion of the sheath so as to be capable of receiving light emitted by the endoscope and transmitting the light to a distal end of the plastic optical fiber.

The embodiment of the application also provides an endoscope system, which comprises an endoscope and any one of the sheath assemblies, wherein the endoscope comprises a mounting seat, an operating part and a video tube, the near end of the video tube extends into the mounting seat, the operating part is arranged on the mounting seat and can control the bending or resetting of the far end of the video tube, and the far end of the video tube is provided with an image sensor; the proximal end of the sheath is detachably connected with the mounting seat.

In some embodiments, the light guide unit is a plastic optical fiber, the plastic optical fiber is pre-embedded in the sheath, the endoscope system includes a light source, the mounting base has a light source cavity and a light emission port, the light source is disposed in the light source cavity, a proximal end surface of the plastic optical fiber is exposed at a proximal end portion of the sheath and aligned with the light emission port, and light emitted by the light source is incident into the plastic optical fiber through the light emission port.

In some embodiments, the proximal end face of the adaptor is provided with a convex taper, the proximal end of the light guide lumen terminates at a surface of the taper, and the distal end of the mount is provided with a tapered groove into which the taper is inserted.

Embodiments of the present application also provide another endoscope system, including: the endoscope comprises a mounting seat, an operating part and a video tube, wherein the proximal end of the video tube extends into the mounting seat, the operating part is arranged on the mounting seat and can control the distal end of the video tube to bend or reset, and the distal end of the video tube is provided with an image sensor; a flange is arranged on the circumferential surface of the far end of the mounting seat, a necking part is formed at the end part of the near end of the connecting sleeve, the flange extends into the connecting sleeve, the necking part abuts against one side, away from the adaptor, of the flange, and the connecting sleeve can idle relative to the mounting seat; the remote end of connecting sleeve pipe is provided with the internal thread, the near-end of adaptor be provided with internal thread complex external screw thread, the near-end of adaptor stretch into in the connecting sleeve pipe and with the mount pad butt joint.

In some embodiments, the proximal end face of the adaptor is provided with a convex taper, the proximal end of the light guide lumen terminates at a surface of the taper, and the distal end of the mount is provided with a tapered groove into which the taper is inserted.

According to the sheath assembly of the embodiment of the application, when the endoscope is needed, the sheath is sleeved on the video tube, and the near end of the sheath is fixedly connected with the mounting seat of the endoscope, and the far end of the video cavity is a closed end, so that the video tube cannot be contacted with the internal tissue of a patient in the using process, the cross infection risk of the endoscope in the repeated use process is greatly reduced, and the video tube can be sterilized in a lower grade manner, such as wiping; on the other hand, the light guide unit is arranged in the light guide cavity, light rays of the light guide unit are directly projected to the surrounding environment, light signals collected by the image sensor are subjected to diffuse reflection from tissues in the body of a patient, the light rays of the light guide unit basically cannot enter the inner wall surface, located around the image sensor, of the image cavity, and the image tube is bent at the far end, so that the phenomenon of light reflection basically cannot occur on the inner wall surface, corresponding to the periphery of the image sensor, of the image cavity, the collection of the light signals by the image sensor is basically not interfered, and the image tube is favorable for outputting high-quality images; on the other hand, after the endoscope uses, can pull out the sheath subassembly from the endoscope, the sheath subassembly can be given up as disposable consumables, avoids the secondary to use, avoids cross infection, and moreover, the sheath subassembly can not show increase use cost, convenient to popularize and use.

Drawings

FIG. 1 is an exploded view of an endoscope system according to an embodiment of the present application;

FIG. 2 is a schematic, partially cross-sectional view of the structure of FIG. 1 after assembly;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic partial cross-sectional view of the structure of FIG. 1 from another perspective after assembly;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B;

FIG. 6 is a cross-sectional view taken along the line C-C in FIG. 2;

FIG. 7 is a schematic structural diagram of an interposer according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a pipe joint according to an embodiment of the present application.

Description of the reference numerals

An endoscope 1; a display 11; a mounting base 12; a tapered recess 12a; a flange 12b; a video tube 13; an operation unit 14; a jacket assembly 2; a sheath 21; the visual cavity 21a; a light guide channel 21b; a working channel 21c; a sheath main body 211; an adaptor 212; a tapered portion 212a; external threads 212b; the branch projections 212c; a pipe joint 213; trunk lumen 213'; branch channel 213 "; a light guide unit 22; a plug 24; a connecting sleeve 3; a throat portion 3a; internal thread 3b

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the present embodiment, proximal refers to the end near the operator and distal refers to the end near the patient.

The embodiment of the present application provides a sheath assembly 2 for an endoscope 1, and referring to fig. 1, the sheath assembly 2 includes a sheath 21 and a light guide unit 22.

An endoscope system is also provided, please refer to fig. 1 again, and includes an endoscope 1 and a sheath assembly 2 according to the embodiment of the present application.

The endoscope 1 in the embodiment of the present application is not limited in specific use, and may be, for example, an enteroscope, a laryngoscope, a gastroscope, a bronchoscope, a hysteroscope, or the like, without being limited thereto.

In some embodiments, referring to fig. 1, 2 and 4, the endoscope 1 includes a mounting base 12, an operation portion 14 and a video tube 13, a proximal end of the video tube 13 extends into the mounting base 12, the operation portion 14 is disposed on the mounting base 12 and can control a distal end of the video tube 13 to bend or reposition, and an image sensor is disposed at a distal end of the video tube 13.

It should be noted that the specific implementation means of the operation portion 14 for controlling the bending or resetting of the distal end of the image tube 13 can be implemented by means existing in the prior art, and will not be described herein again.

In some embodiments, the endoscope 1 further comprises a display 11, and image data collected by the image sensor is transmitted to the display 11 for display. In other embodiments, the data collected by the image sensor may be transmitted to an external display device, for example, a terminal device such as a computer or a mobile phone.

Referring to fig. 5 and 6, the sheath 21 includes a light guide channel 21b, an image channel 21a, and a working channel 21c for passing fluid or surgical instruments therethrough, wherein the fluid may be liquid or gas, the image tube 13 of the endoscope 1 is insertable into the image channel 21a, the distal end of the image channel 21a is a closed end, and the distal end of the working channel 21c is open; the distal end of the sheath 21 can be controllably bent or repositioned following the distal end of the viewing tube 13; the light guide unit 22 is disposed in the light guide channel 21b to provide illumination to the field of view of the view tube 13.

When the endoscope 1 needs to be used, the sheath 21 is sleeved on the video tube 13, and the proximal end of the sheath 21 is fixedly connected with the mounting seat 12 of the endoscope 1, and the distal end of the video lumen 21a is a closed end, so that the video tube 13 cannot be contacted with the tissue in the body of a patient during the use process, the risk of cross infection of the endoscope during the repeated use process is greatly reduced, and the video tube can be sterilized in a lower grade manner, such as wiping; on the other hand, the light guide unit 22 is disposed in the light guide channel 21b, the light of the light guide unit 22 is directly projected to the surrounding environment, the light signal collected by the image sensor is diffusely reflected from the tissue in the patient's body, the light of the light guide unit 22 does not substantially directly enter the inner wall surface of the visual channel 21a around the image sensor, the visual tube 13 is bent at the far end, and the reflective phenomenon does not substantially occur on the inner wall surface of the visual channel 21a around the image sensor, so that the collection of the light signal by the image sensor is not substantially interfered, and the visual tube 13 is facilitated to output a high-quality image; on the other hand, after endoscope 1 used, can pull out sheath subassembly 2 from endoscope 1, sheath subassembly 2 can be given up as disposable consumables, avoids the secondary use, avoids cross infection, moreover, sheath subassembly 2 can not show increase use cost, convenient to popularize and use.

It should be noted that the number of the light guide channels 21b may be one, or two or more. In the embodiment where the light guide channels 21b are multiple in number, the light guide units 22 are also multiple in number, and at least one light guide unit 22 is disposed in each light guide channel 21 b.

It is understood that the light guide unit 22 may be embedded in the light guide channel 21b in situ, or may be embedded in the light guide channel 21 b.

In an exemplary embodiment, the light guide unit 22 is a Plastic Optical Fiber (POF), the Plastic Optical fiber is pre-embedded in the sheath 21 and fixed in the light guide channel 21b of the sheath 21 by, for example, adhesion, and the like, and a proximal end surface of the Plastic Optical fiber is exposed at a proximal end of the sheath 21 to receive the light emitted from the endoscope 1 and transmit the light to a distal end of the Plastic Optical fiber. That is, in this embodiment, the endoscope 1 is provided with a light source, and the light source is not disposed in the sheath 21, but is transmitted through the plastic optical fiber, so that the light emitted from the light source is transmitted to the distal end of the sheath 21, and the illumination is provided for the visual field of the image tube 13. In this embodiment, on one hand, the plastic optical fiber has low cost and can be bent at will without breaking risk, and on the other hand, the sheath 21 is not provided with a light source, so that the cost of using the sheath 21 as a disposable consumable can be further reduced. Moreover, the plastic optical fibers are used for guiding light, so that current in the sheath can be avoided, and the use safety of the safety sheath is improved.

It should be noted that the plastic optical fiber is an optical fiber in which a highly transparent polymer such as polystyrene, polymethyl methacrylate, or polycarbonate is used as a core material, and polymethyl methacrylate, fluoroplastic, or the like is used as a sheath material. In the embodiment of the application, the plastic optical fiber does not need to transmit communication optical signals, so that the common plastic optical fiber is adopted, and the cost of the sheath component can be greatly reduced.

Specifically, in an embodiment, the mounting base 12 has a light source cavity and a light emitting opening, the light source is disposed in the light source cavity, the proximal end surface of the plastic optical fiber is exposed at the proximal end portion of the sheath 21 and aligned with the light emitting opening, and the light emitted by the light source is incident into the plastic optical fiber through the light emitting opening.

In other embodiments, the light guide unit includes wires and an electroluminescent device, which refers to a device that emits light upon being energized, such as an LED lamp. An electroluminescent emitter is disposed at the distal end of the light guide channel 21b, and an electrical wire is connected to the electroluminescent emitter and extends along the length of the light guide channel 21 b. In this embodiment, the power supply mode for the power line is not limited, for example, a switching socket is arranged at the proximal end of the sheath, and when the sheath is used, the interface of the data line is inserted into the switching socket to switch on the power supply.

In order to facilitate the connection between the sheath 21 and the mounting base 12, in an embodiment, referring to fig. 1, 3 and 5, the sheath 21 includes a sheath main body 211 and an adaptor 212 connected to a proximal end of the sheath main body 211, the proximal end of the adaptor 212 is configured to be detachably connected to a portion of the structure of the endoscope 1, specifically, the mounting base 12 of the endoscope 1, and the light guide channel 21b, the image channel 21a and the working channel 21c all penetrate through the adaptor 212. In this embodiment, the sheath main body 211 can be made of a material having a good light transmittance and meeting medical standards, such as polyvinyl chloride and silica gel. The adaptor 212 may be made of a hard plastic, which facilitates the structural strength and connection reliability of the connection between the adaptor 212 and the mounting base 12.

In one embodiment, the distal end of the adaptor 212 is sleeved and fixedly connected to the sheath body 211, for example, by bonding, ultrasonic welding, etc. It should be noted that the sleeve joint includes two cases, one is that the proximal end of the sheath main body 211 is sleeved on the outer surface of the adaptor 212, and the other is that the sheath main body 211 extends into the adaptor 212, and the adaptor 212 is nested with the sheath main body 211. In this embodiment, the contact area between the adaptor 212 and the sheath body 211 can be increased, and the connection reliability between the adaptor and the sheath body can be improved.

In one embodiment, referring to fig. 1 and 5, the sheath assembly 2 includes a coupling 213 connected to one lateral side of the adaptor 212, the coupling 213 including a main channel 213' for fluid passage and a branch channel 213 "for passage of a surgical instrument, the main channel 213' communicating with the branch channel 213", and a distal end of the main channel 213' being connected to an inlet of the working channel 21 c. The pipe joint 213 can reduce the complexity of a mold for injection molding of the adaptor 212, and reduce the production cost; in addition, the adapter 213 may be shaped to fit an external device.

It should be noted that the branch channel 213 ″ may also be used for fluid to pass through, and the main channel 213' may also be used for surgical instruments to pass through, without limitation.

Illustratively, referring to fig. 5, a lateral side of the adaptor 212 is provided with a branch protrusion 212c, a proximal end of the working channel 21c extends to an end surface of the branch protrusion 212c, and an end of the pipe joint 213 is sleeved on the branch protrusion 212c and fixedly connected with the branch protrusion 212c, for example, by bonding or ultrasonic welding.

Referring to fig. 8, in one embodiment, the pipe joint 213 is substantially Y-shaped, so that the inlet 213a of the main channel 213' and the inlet 213b of the branch channel 213 ″ are spaced apart by a suitable distance, and the material of the pipe joint 213 can be reduced.

In one embodiment, referring to fig. 5, the trunk channel 213' and the working channel 21c in the adaptor 212 are arranged along the same line. In this way, the flow turning of the fluid in the working channel 21c can be reduced as much as possible, and the flow resistance of the fluid can be reduced.

In one embodiment, the included angle between the working channel 21c in the adaptor 212 and the main channel 213' is 110-160 °, so as to minimize the bending angle of the surgical instrument after entering the branch channel 213 ″ and reduce the delivery resistance of the surgical instrument.

In one embodiment, referring again to FIG. 5, the sheath assembly 2 includes a plug 24 for plugging the branch channel 213 ", the plug 24 being removably disposed in the inlet of the branch channel 213". Since the main channel 213' and the branch channel 213 "are both communicated with the working channel 21c, when the working channel 21c needs to transfer fluid (e.g., liquid or gas), such as delivering anesthetic to the lesion of the patient, locally spraying water, or extracting tissue fluid from the patient, the branch channel 213" is blocked by the plug 24 to maintain airtightness and prevent fluid from overflowing from the branch channel 213 ".

In one embodiment, referring to fig. 3 and 7, the proximal end surface of the adaptor 212 is provided with a convex taper portion 212a, the proximal end of the light guide channel 21b terminates at the surface of the taper portion, the distal end of the mounting seat 12 is provided with a tapered groove 12a, and the taper portion 212a is inserted into the tapered groove 12 a. The engagement of the tapered portion 212a and the tapered recess 12a enables quick positioning of the adaptor 212 and the mounting block 12 and also prevents lateral relative displacement of the mounting block 12 and the adaptor 212.

In order to realize the quick assembly and quick disassembly of the adaptor 212 and the mounting seat 12, in an embodiment, referring to fig. 3 and 5, the endoscope system includes the connection sleeve 3, the circumferential surface of the distal end of the mounting seat 12 is provided with a flange 12b, the proximal end of the connection sleeve 3 is formed with a necking portion 3a, the flange 12b extends into the connection sleeve 3, the necking portion 3a abuts against one side of the flange 12b away from the adaptor 212, so that the connection sleeve 3 cannot be separated from the mounting seat 12 from the distal end of the mounting seat 12, and the connection sleeve 3 can idle relative to the mounting seat 12, that is, the connection sleeve 3 can generate a certain displacement in the axial direction relative to the mounting seat 12 and also can rotate in the circumferential direction relative to the mounting seat 12, and the axial displacements of the connection sleeve 3 and the mounting seat 12 do not change during the rotation. The distal end of the connecting sleeve 3 is provided with an internal thread 3b, the proximal end of the adaptor 212 is provided with an external thread 212b matched with the internal thread 3b, and the proximal end of the adaptor 212 extends into the connecting sleeve 3 and is butted with the mounting seat 12.

During assembly, the proximal end of the adaptor 212 is brought closer to the distal end of the mounting base 12, the adapter 3 is held, the adaptor 212 is linearly moved, the adapter 3 is rotated, and the adaptor 212 is continuously moved toward the mounting base 12 during the rotation of the adapter 3 until the end of the adaptor 212 abuts against the end of the mounting base 12, so that the proximal end face of the plastic optical fiber is aligned with the light emitting port of the mounting base 12, because the external thread 212b and the internal thread 3b are engaged. In this embodiment, the adaptor 212 may not be rotated, so that the end portion of the adaptor 212 and the end portion of the mounting seat 12 may be well attached to each other even when the proximal end portion of the adaptor 212 is provided with the rugged structure, for example, in the embodiment in which the proximal end portion of the adaptor 212 is provided with the tapered portion 212a as described above, since the adaptor 212 does not need to be rotated, the tapered portion 212a does not interfere with other structures at the end portion of the mounting seat 12, so that the tapered portion 212a can be reliably inserted into the tapered groove 12 a.

It should be noted that in embodiments where the proximal end of the adaptor 212 does not have a rugged structure, the adaptor 212 may also be rotated, i.e., relative rotation between the adaptor 212 and the mounting block 12 may also be caused during assembly.

The various embodiments/implementations provided herein can be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (13)

1. A sheathing assembly, for an endoscope (1), characterized in that it comprises:

the endoscope (1) comprises a sheath (21), wherein the sheath (21) comprises a light guide cavity channel (21 b), an image cavity channel (21 a) and a working cavity channel (21 c) for fluid or surgical instruments to pass through, an image tube (13) of the endoscope (1) is inserted into the image cavity channel (21 a) in an inserting and pulling manner, the far end of the image cavity channel (21 a) is a closed end, and the far end of the working cavity channel (21 c) is opened; the distal end of the sheath (21) can controllably bend or reposition following the distal end of the viewing tube (13);

the light guide unit (22), light guide unit (22) set up in light guide chamber says (21 b) to provide illumination to the visual field of looking like the pipe (13).

2. The sheathing assembly according to claim 1, characterized in that the light-conducting unit (22) is pre-embedded in the light-conducting channel (21 b).

3. The sheath assembly according to claim 1, characterized in that the sheath (21) comprises a sheath body (211) and an adaptor (212) connected to a proximal end of the sheath body (211), the adaptor (212) proximal end being intended for detachable connection with a part of the structure of the endoscope (1), the light-conducting channel (21 b), the image channel (21 a) and the working channel (21 c) all extending through the adaptor (212).

4. The sheath assembly of claim 3, wherein the distal end of the adaptor (212) is sleeved and fixedly connected with the sheath body (211).

5. The sheathing assembly according to claim 3, comprising a nipple (213) connected to one lateral side of the adaptor (212), the nipple (213) comprising a main channel (213 ') for the passage of fluid and a branch channel (213 ") for the passage of surgical instruments, the main channel (213 ') and the branch channel (213") communicating, the end of the main channel (213 ') being connected to the inlet of the working channel (21 c).

6. The sheathing assembly according to claim 5, characterised in that the trunk channel (213') and the working channel (21 c) in the adaptor (212) are arranged along the same line.

7. The sheathing assembly according to claim 5, characterised in that the endoscopic system comprises a stopper (24) for blocking the branch duct (213 "), said stopper (24) being insertably arranged in the entrance of the branch duct (213").

8. The sheathing assembly according to claim 1, characterized in that the light-conducting unit (22) is a plastic optical fiber, which is pre-embedded in the sheathing (21), the proximal end face of which is exposed at the proximal end of the sheathing (21) so as to be able to receive the light emitted by the endoscope (1) and conduct it to the distal end of the plastic optical fiber.

9. An endoscopic system, comprising:

the endoscope (1) comprises a mounting seat (12), an operation part (14) and a video tube (13), wherein the near end of the video tube (13) extends into the mounting seat (12), the operation part (14) is arranged on the mounting seat (12) and can control the bending or resetting of the far end of the video tube (13), and an image sensor is arranged at the far end of the video tube (13);

and a sheath assembly according to any one of claims 1 to 7, the proximal end of the sheath (21) being removably connected to the mounting (12).

10. The endoscope system according to claim 9, wherein the light guide unit (22) is a plastic optical fiber embedded in the sheath (21), the endoscope system comprises a light source, the mounting base (12) has a light source cavity and a light emitting port, the light source is disposed in the light source cavity, a proximal end surface of the plastic optical fiber is exposed to a proximal end portion of the sheath (21) and aligned with the light emitting port, and light emitted from the light source is incident into the plastic optical fiber through the light emitting port.

11. An endoscope system according to claim 10, characterized in that the proximal end face of the adapter (212) of the sheath is provided with a protruding cone (212 a), the proximal end of the light-conducting lumen (21 b) terminates at the surface of said cone, the distal end of the mounting seat (12) is provided with a conical groove (12 a), the cone (212 a) being inserted in the conical groove (12 a).

12. An endoscopic system, comprising:

the endoscope (1) comprises a mounting seat (12), an operation part (14) and a video tube (13), wherein the near end of the video tube (13) extends into the mounting seat (12), the operation part (14) is arranged on the mounting seat (12) and can control the bending or resetting of the far end of the video tube (13), and an image sensor is arranged at the far end of the video tube (13);

and the jacket assembly of any one of claims 3-7;

the endoscope system comprises a connecting sleeve (3), a flange (12 b) is arranged on the circumferential surface of the far end of the mounting seat (12), a necking part (3 a) is formed at the near end part of the connecting sleeve (3), the flange (12 b) extends into the connecting sleeve (3), the necking part (3 a) abuts against one side, away from the adapter piece (212), of the flange (12 b), and the connecting sleeve (3) can idle relative to the mounting seat (12); the remote end of adapter sleeve (3) is provided with internal thread (3 b), the near-end of adaptor (212) be provided with internal thread (3 b) complex external screw thread (212 b), the near-end of adaptor (212) stretch into in adapter sleeve (3) and with mount pad (12) butt joint.

13. An endoscope system according to claim 12, characterized in that a proximal end face of said adaptor (212) is provided with a convex conical part (212 a), a proximal end of said light guiding lumen (21 b) terminates at a surface of said conical part, a distal end of said mounting seat (12) is provided with a conical groove (12 a), said conical part (212 a) being inserted into said conical groove (12 a).

Images