Endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope which comprises an insertion mechanism and a handle mechanism, the insertion mechanism comprises an imaging assembly, a front guide sleeve and an intubation tube, one end of the imaging assembly is movably installed on the front guide sleeve, and the front guide sleeve is used for wrapping part of the imaging assembly. When the front guide sleeve wraps the imaging assembly, the outer contour of the side face of the front guide sleeve is completely flush with the outer contour of the imaging assembly. The cannula comprises an inner tube and an outer tube, the hollow interior of the inner tube is used for a working instrument to pass through an instrument channel extending into the uterus, the front guide sleeve is installed at the far-end port of the cannula, and when the working instrument penetrates out of the far-end port of the inner tube, the imaging assembly is lifted and partially disengaged from the front guide sleeve. The movable imaging assembly is arranged in the insertion mechanism of the endoscope, the imaging assembly is wrapped in the front guide sleeve to form an insertion end with a smaller diameter during insertion, and after insertion, the imaging assembly is lifted up when a working instrument passes through, so that the working instrument can be normally used and is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an endoscope. Background Art

[0002] As a medical diagnostic device, an endoscope can enter the human body through the natural body cavity or a minimally invasive hole. Through the camera encapsulated at its distal end, it can capture images of the lesion site, providing sufficient diagnostic information and treatment plans for doctors. Endoscopes are increasingly used in modern minimally invasive surgeries. A hysteroscope is a type of endoscope used to examine the interior of the uterine cavity. During use, the front part of the lens enters the uterine cavity, and the lens of the hysteroscope can magnify and observe the parts inside the uterine cavity for accurate measurement. Without laparotomy, the diagnosis is more accurate, significantly improving the diagnostic accuracy rate. From the perspective of examination, the hysteroscope is the preferred examination device for gynecological hemorrhagic diseases and intrauterine lesions.

[0003] However, during the use of a hysteroscope, due to the limited use environment of the narrow cervical oral cavity of the human body, an insertion part with a larger diameter may have a greater friction with human tissues, resulting in blocked passage, increasing the patient's pain and discomfort. At the same time, it may cause damage to the internal mucosa, which is not conducive to treatment and even poses a risk of secondary injury. Therefore, the outer diameter of the insertion part of the hysteroscope must be maintained within a certain size. And the insertion part of the endoscope is the execution end of the endoscope, and components such as lighting LEDs or light guide beams, camera modules, flushing devices, and disposal instrument channel tubes need to be arranged inside the insertion part, which inevitably requires an insertion part with a larger inner diameter.

[0004] Therefore, there is a need for an endoscope with an insertion part that can smoothly pass through the narrow cervical oral cavity of the human body, avoid causing secondary injury, and can reasonably arrange various components. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide an endoscope. An imaging component is arranged to be movable in the insertion mechanism. When inserting, the imaging component is wrapped in the front guide sleeve to form an insertion end with a smaller diameter. After insertion, when a working instrument passes through, the imaging component is lifted to facilitate the normal use of the working instrument. It is convenient to use and can effectively improve the surgical efficiency.

[0006] The present utility model solves the above technical problems through the following technical means:

[0007] The present utility model provides an endoscope, which includes an insertion mechanism and a handle mechanism. The insertion mechanism is installed on the handle mechanism. The insertion mechanism includes an imaging assembly, a front guide sleeve, and an intubation tube. One end of the imaging assembly is movably installed on the front guide sleeve. The front guide sleeve is used to wrap part of the imaging assembly and limit the movement of the imaging assembly. When the front guide sleeve wraps on the imaging assembly, the outer contour of the side surface of the front guide sleeve is completely flush with the outer contour of the side surface of the imaging assembly.

[0008] The intubation tube includes an inner tube and an outer tube. The inner tube is inserted through the outer tube. The hollow interior of the inner tube is used for a working instrument to pass through and extend into the instrument channel in the uterus. The front guide sleeve is installed at the distal port part of the intubation tube. When the working instrument passes out from the distal port of the inner tube, the imaging assembly is lifted and partially disengaged from the front guide sleeve.

[0009] In some embodiments, a shrapnel is connected between the imaging assembly and the intubation tube. The shrapnel is used to control the reset of the imaging assembly.

[0010] In some embodiments, a first support sleeve is installed inside the distal end of the intubation tube. The first support sleeve has a shrapnel groove. One end of the shrapnel is embedded in the shrapnel groove, and the other end is installed on the imaging assembly.

[0011] In some embodiments, the other end of the imaging assembly protrudes from the corresponding end of the front guide sleeve.

[0012] In some embodiments, the end of the front guide sleeve close to the intubation tube has an installation groove, and the installation groove is inclined. A connecting column is provided at the position of the imaging assembly corresponding to the installation groove, and the connecting column is located in the installation groove.

[0013] In some embodiments, the inner tube and the outer tube are eccentrically arranged.

[0014] In some embodiments, the handle mechanism includes a housing, a sleeve, and a driving mechanism. The sleeve is located inside the housing. The proximal end of the outer tube is located inside the sleeve. The proximal end of the inner tube passes through the sleeve and is connected to the driving mechanism. The driving mechanism is used to control the limited rotation of the intubation tube.

[0015] In some embodiments, the driving mechanism includes a knob and a limit sleeve. The proximal end of the inner tube is fixed in the limit sleeve. The rotation of the knob drives the limit sleeve to rotate. A plurality of circumferentially equally spaced limit grooves are provided on the outer wall of the limit sleeve. A steel ball blind hole is provided on the inner wall of the housing. A movable steel ball is arranged in the steel ball blind hole. The steel ball is clamped in one of the limit grooves, and a spring is connected between the steel ball and the steel ball blind hole.

[0016] In some embodiments, the side wall of the limit sleeve further has a limit protrusion, and the inner wall of the housing has a limit stop, and the limit stop is used to limit the circumferential unrestricted rotation of the limit protrusion.

[0017] In some embodiments, a support tube is sleeved on the proximal end of the inner tube, one end of the support tube is inserted into the sleeve, and the other end is inserted into the limit sleeve.

[0018] For the endoscope of the present invention, during the whole process of inserting the cannula into the uterus, the imaging assembly part is wrapped in the front guide sleeve. At this time, the radial dimension of the insertion end of the cannula is small so as to smoothly enter the uterus. And the outer contour of the side surface of the front guide sleeve is completely flush with the outer contour of the side surface of the imaging assembly, avoiding causing secondary damage to the surrounding tissues. When a working instrument needs to enter the uterus for operation, when the working instrument enters from the inner tube to the distal end of the cannula, the working instrument pushes the imaging assembly out to partially disengage from the front guide sleeve, and the working instrument can smoothly pass through the cannula for operation. When the working instrument withdraws, the imaging assembly resets into the front guide sleeve. In this way, the problem that a cannula with a smaller radial dimension is required to enter the uterus, and a larger dimension of the cannula is required for the insertion of the working instrument is solved, which is convenient to use and can effectively improve the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the state where the imaging assembly in the endoscope is wrapped in the front guide sleeve;

[0020] Figure 2 is Figure 1 an enlarged view of part C in

[0021] Figure 3 is Figure 1 a view in the A-A direction in

[0022] Figure 4 is Figure 3 an enlarged view of part D in

[0023] Figure 5 is Figure 3 an enlarged view of part E in

[0024] Figure 6 is Figure 1 a view in the B-B direction in

[0025] Figure 7 is a schematic structural diagram of the state where the imaging assembly in the endoscope is lifted and partially disengaged from the front guide sleeve;

[0026] Figure 8 is Figure 7 an enlarged view of part F in

[0027] Figure 9 isFigure 7 Schematic cross-sectional structure diagram;

[0028] Figure 10 is Figure 9 The enlarged view at position G in

[0029] Figure 11 is Figure 9 The enlarged view at position H in

[0030] Figure 12 Schematic enlarged structure diagram of the driving mechanism;

[0031] Figure 13 Schematic enlarged structure diagram of the front guide sleeve;

[0032] Figure 14 Schematic enlarged structure diagram of the imaging component;

[0033] Figure 15 Cross-sectional view of the sleeve;

[0034] Figure 16 Schematic enlarged structure diagram of the first support sleeve;

[0035] Figure 17 Schematic enlarged structure diagram of the second support sleeve;

[0036] Among them, the front guide sleeve 110, the installation groove 111, the limiting piece 112, the insertion tube 120, the inner tube 121, the outer tube 122, the round hole 1221, the module 131, the lens holder 132, the connecting column 1321, the LED lamp 133, the elastic piece 140, the first support sleeve 151, the elastic piece groove 1511, the wire passing groove 1512, the second support sleeve 152, the flat square 1521,

[0037] The housing 210, the snap ring 211, the steel ball blind hole 212, the steel ball 213, the spring 214, the limiting block 215, the sleeve 220, the card slot 221, the wire hole 222, the water injection connecting pipe 223, the water extraction connecting pipe 224, the knob 231, the limiting sleeve 232, the limiting groove 2321, the limiting protrusion 2322, the support tube 240, the sealing seat 250,

[0038] The eccentric tube 300, the stainless steel sleeve 400, the water injection pipe 500, the water extraction pipe 600, the hydraulic sensor 700. Specific embodiments

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Please refer to Figure 1-17 The endoscope of this embodiment includes an insertion mechanism and a handle mechanism, and the insertion mechanism is installed on the handle mechanism. The insertion mechanism is used to install the imaging component and pass through the cervix to enter the uterine cavity. The insertion mechanism includes an imaging component 130, a front guide sleeve 110 and an insertion tube 120. One end of the imaging component 130 is movably installed on the front guide sleeve 110. Here, the imaging component 130 has a mounting end and a free end. The mounting end of the imaging component 130 is always mounted on the front guide sleeve 110, and its free end can move in a direction away from or close to the front guide sleeve 110. The front guide sleeve 110 is used to wrap part of the imaging component 130 and limit the movement of the imaging component 130. When the front guide sleeve 110 is wrapped on the imaging component 130, the side outer contour of the front guide sleeve 110 is completely flush with the side outer contour of the imaging component 130. The insertion tube 120 is an elongated, tubular component, and the size of the insertion tube 120 meets the requirements of passing through the cervix and entering the uterus. The cannula 120 has a first lumen and a second lumen extending from the proximal end of the cannula 120 to the distal end of the cannula 120. In this embodiment, the distal end of the cannula 120 refers to the end of the cannula 120 extending into the uterus, and the proximal end of the cannula 120 refers to the end of the cannula 120 away from the distal end. The first lumen is located in the second lumen. The first lumen is used for the instrument channel through which the working instrument extends into the uterus, and the second lumen is used for the FPC cable to pass through the channel. The front guide sleeve 110 is installed at the distal end of the cannula 120. When the working instrument passes through the distal end of the cannula 120, the imaging assembly 130 is lifted and partially separated from the front guide sleeve 110.

[0041] The working instruments of the present invention can be used for surgery or biopsy purposes, and the working instruments include but are not limited to various biopsy instruments (eg, forceps, graspers, scissors, etc.) with a size of 5Fr or less.

[0042] During the process of inserting the insertion mechanism into the uterus, the front guide sleeve 110 is wrapped around the imaging component 130 and forms an insertion end with a smooth outer contour to avoid scratching the surrounding tissue and causing secondary damage; when a working instrument is needed to operate, the working instrument enters the first lumen from the handle mechanism. As the working instrument gradually reaches the distal end of the cannula 120, the imaging component 130 is forced to lift up to partially separate from the front guide sleeve 110, so that the working instrument can smoothly pass through the first lumen to operate.

[0043] In order to better reset the imaging assembly 130 to be wrapped in the front guide sleeve 110 after the working instrument exits the cannula 120, a spring 140 is connected between the imaging assembly 130 and the cannula 120. The spring 140 is an elastic steel sheet used to control the reset of the imaging assembly 130. In order to better install the spring 140, a first support sleeve 151 is installed inside the distal end of the cannula 120. Please refer to Figure 16 The first support sleeve 151 has a spring slot 1511, one end of the spring 140 is embedded in the spring slot 1511, and the other end is installed on the imaging component 130. The other end of the spring 140 can be installed on the imaging component 130 by gluing.

[0044] Please refer to Figure 10 and 14 The imaging assembly 130 includes a lens module 131, a lens holder 132 and at least one LED lamp 133. The lens module 131 generally includes a camera capable of taking photos, which is used to take images of the interior of the uterus. Furthermore, the other end of the shrapnel 140 can be mounted on the lens holder by gluing. The LED lamp 133 is used to illuminate the interior of the uterus, and the LED lamp 133 is arranged on the outer circumference of the lens module 131. The lens holder 132 is used to install and fix the lens module 131 and the LED lamp 133. The lens holder 132 has a smooth outer surface, and the outer contour of the lens holder 132 is adapted to the front guide sleeve 110. In addition, one end of the lens holder 132 away from the cannula 120 exceeds the corresponding end of the front guide sleeve 110, and the radial dimension of the part of the lens holder 132 that exceeds the front guide sleeve 110 is less than or equal to the radial dimension of the other part of the lens holder 132 (the part of the lens holder 132 corresponding to the front guide sleeve 110). Such a design is conducive to reducing the insertion end size of the insertion mechanism and is conducive to the smooth entry of the insertion mechanism into the uterus.

[0045] The insert tube 120 includes an inner tube 121 and an outer tube 122. The outer tube 122 is sleeved on the inner tube 121. The gap between the inner tube 121 and the outer tube 122 constitutes a second lumen, and the hollow interior of the inner tube 121 constitutes a first lumen. In order to minimize the radial dimension of the insert tube 120 and to ensure smooth passage of the FPC cable and smooth flow of injected water, the inner tube 121 and the outer tube 122 are eccentrically arranged, and the side with a larger gap between the eccentrically arranged inner tube 121 and the outer tube 122 serves as the main cavity of the second lumen, which is used for the passage of the FPC cable and the main flow channel for water injection.

[0046] In order to better arrange the FPC cable connected to the lens module 131 and the LED light 133, please refer to Figure 16, there is also a wire routing groove 1512 on the first support sleeve 151, and the wire routing groove 1512 communicates with the second lumen. In order to make the arrangement of the FPC flexible printed circuit more orderly, the wire routing groove 1512 is arranged at a position corresponding to the elastic piece groove 1511, that is, the elastic piece groove 1511 is located on the outer wall of the first support sleeve 151, and the wire routing groove 1512 is located on the inner wall of the first support sleeve 151 corresponding to the elastic piece groove 1511.

[0047] Please refer to Figure 13 , one end of the front guide sleeve 110 close to the intubation tube 120 has an installation groove 111, the installation groove 111 is inclined and has a limiting piece 112, please refer to Figure 14 , at a position corresponding to the installation groove 111 on the imaging assembly 130, there is a connecting column 1321, and the connecting column 1321 is located in the installation groove 111. The setting of the limiting piece 112 can prevent the imaging assembly 130 from falling off.

[0048] The handle mechanism includes a housing 210, a sleeve 220 and a driving mechanism. The sleeve 220 is located inside the housing 210. The proximal end of the outer tube 122 is located inside the sleeve 220. The proximal end of the inner tube 121 passes through the sleeve 220 and is connected to the driving mechanism. The driving mechanism is used to control the limited rotation of the intubation tube 120, and the driving mechanism is also used for the insertion of the working instrument.

[0049] Please refer to Figure 11 , an eccentric tube 300 is installed between the sleeve 220 and the outer tube 122, and the eccentric tube 300 is fixedly sleeved on the outer tube 122. The eccentric tube 300 closes one end of the housing 210 close to the imaging assembly 130. A stainless steel sleeve 400 is installed between the eccentric tube 300 and the sleeve 220, and the stainless steel sleeve 400 is fixed on the inner wall of the sleeve 220 to reduce the friction generated when the eccentric tube 300 rotates relative to the sleeve 220. In order to better maintain the eccentric arrangement between the outer tube 122 and the inner tube 121, a second support sleeve 152 is installed between the proximal end of the outer tube 122 and the inner tube 121. There is a flat side 1521 on the outer wall of the second support sleeve 152, and the setting of the flat side 1521 is beneficial to the smooth passage of the FPC flexible printed circuit.

[0050] Please refer to Figure 5 , Figure 6 and Figure 11 , in order to install the sleeve 220 more stably in the housing 210, there is a card slot 221 on the circumferential outer wall of the sleeve 220, and a snap ring 211 is provided at a position corresponding to the card slot 221 on the housing 210, and the snap ring 211 is embedded in the card slot 221. In order to allow the FPC flexible printed circuit to smoothly enter the second lumen, a wire routing hole 222 is provided on the sleeve 220 for the FPC flexible printed circuit to pass through.

[0051] Please refer to Figure 9 , Figure 11 ,Figure 15 On the sleeve 220, there are a water injection connecting pipe 223 and a water pumping connecting pipe 224. The water inlet end of the water injection connecting pipe 223 is connected to a water injection pipe 500, and the water outlet end of the water injection connecting pipe 223 communicates with the second lumen, that is, the water outlet end of the water injection connecting pipe 223 communicates with the hollow interior of the sleeve 220. The hollow interior of the sleeve 220 communicates with the interior of the outer pipe 122, that is, the hollow interior of the sleeve 220 communicates with the second lumen. However, the hollow interior of the sleeve 220 cannot communicate with the inner pipe 121. The water inlet end of the water pumping connecting pipe 224 communicates with the first lumen, that is, the inner pipe 121 has a water outlet hole at the position corresponding to the water inlet end of the water pumping connecting pipe 224, and the water inlet end of the water pumping connecting pipe 224 is connected at the water outlet hole. The water outlet end of the water pumping connecting pipe 224 communicates with a water pumping pipe 600. In order to prevent the uterus from being overly distended during uterine cavity distension, a hydraulic sensor 700 is installed on the water injection pipe to monitor the internal pressure of the uterus for controlling water injection. The hydraulic sensor 700 is located inside the housing 210.

[0052] Please refer to Figure 5 、 Figure 6 、 Figure 11 and Figure 12 The driving mechanism includes a knob 231 and a limit sleeve 232. Both the knob 231 and the limit sleeve 232 have a passage for the working instrument to pass through. The proximal end of the inner pipe 121 is fixed in the limit sleeve 232, one end of the knob 231 is fixedly inserted into the limit sleeve 232, and the rotation of the knob 231 drives the limit sleeve 232 to rotate. The other end of the knob 231 passes through the housing 210 for rotational operation. On the outer wall of the limit sleeve 232, there are a plurality of circumferentially equally spaced limit grooves 2321. On the inner wall of the housing 210, there are steel ball blind holes 212. An active steel ball 213 is arranged in the steel ball blind holes 212. A spring 214 is connected between the steel ball 213 and the steel ball blind holes 212. The steel ball 213 is clamped in one of the limit grooves 2321. Rotate the knob 231, and the limit sleeve 232 rotates with the rotation of the knob 231. During the rotation process, the steel ball 213 jumps out of the original limit groove 2321 and is squeezed into the steel ball blind hole 212 until it rotates to a proper position, and the steel ball 213 is embedded in the corresponding limit groove 2321. The rotation of the limit sleeve 232 will drive the rotation of the inner pipe 121, and the cooperation between the steel ball blind holes 212 and the steel ball 213 can form a certain damping gear feeling for the rotation of the limit sleeve 232 and the inner pipe 121. In order to prevent the limit sleeve 232 from rotating infinitely and driving the inner pipe 121 to rotate infinitely, resulting in FPC cable chaos, the side wall of the limit sleeve 232 also has a limit protrusion 2322, and the inner wall of the housing 210 has a limit stop 215, and the limit stop 215 is used to limit the circumferential unrestricted rotation of the limit protrusion 2322.

[0053] Please refer to Figure 11, in order to improve the strength of the inner tube 121, a support tube 240 is sleeved on the proximal end of the inner tube 121. One end of the support tube 240 is inserted into the sleeve tube 220, and the other end is inserted into the limit sleeve 232. A seal seat 250 is also installed between the support tube 240 and the sleeve tube 220, and a sealing ring is arranged in the seal seat 250.

[0054] In the present utility model, the FPC flexible cable penetrates into the interior of the housing 210 through the cable holes on the sleeve tube 220, enters the interior of the sleeve tube 220, passes through the flat side 1521 on the outer wall of the second support sleeve 152 between the outer tube 122 and the inner tube 121, and enters the channel (i.e., the second lumen) between the outer tube 122 and the inner tube 121. It extends in the second lumen to the first support sleeve 151 and exits from the cable passing groove of the first support sleeve 151, and is connected to the lens module 131 and the LED lamp 133 through the lens seat 132.

[0055] In the present utility model, the water injection pipe 500 is connected to an external water injection mechanism, and the water extraction pipe 600 is connected to an external negative pressure suction mechanism. When it is necessary to inject water into the uterus, the flowing water injected through the water injection pipe 500 flows through the gap (i.e., the second lumen) between the outer tube 122 and the inner tube 121, and flows out from the distal gap between the outer tube 122 and the inner tube 121. Or a plurality of round holes 1221 are opened at the distal end of the outer tube 122, and the positions of the round holes 1221 are outside the corresponding positions of the first support sleeve 151, and the injected flowing water can also flow out from the round holes 1221. When discharging the waste liquid in the uterus, under the action of the external negative pressure suction mechanism, the waste liquid enters the hollow interior of the inner tube 121, flows into the water extraction connecting pipe 224 through the water outlet holes, and then enters the water extraction pipe 600 and is discharged by the water extraction pipe 600.

[0056] When using the endoscope of the present utility model, during the insertion of the intubation tube 120, at this time, the imaging assembly 130 is wrapped in the front guide sleeve 110. The end of the intubation tube 120 has a relatively small radial dimension and a smooth outer contour, so as to be smoothly inserted into the uterus and avoid causing secondary injuries. When it is necessary to rotate the intubation tube 120 to obtain internal uterine photos at more angles by using the imaging assembly 130, rotate the knob 231. During the rotation of the knob 231, the steel ball 213 jumps out of the original limiting groove 2321 and enters the steel ball blind hole 212. The rotation of the knob 231 drives the limiting sleeve 232 to rotate, and the rotation of the limiting sleeve 232 drives the support tube 240 and the inner tube 121 to rotate, and further drives the eccentric tube 300 and the outer tube 122 to rotate, so as to realize multi-angle photography of the imaging assembly 130. After the imaging angle of the imaging assembly 130 is determined, stop the rotation of the knob 231. At this time, the steel ball enters the corresponding limiting groove 2321 to limit the rotation of the limiting sleeve 232 and the inner tube 121 and prevent them from automatically rotating. When it is necessary to operate with a working instrument, the working instrument passes through the knob 231 and the limiting sleeve 232 and enters the inner tube 121 (i.e., the first lumen). The working instrument passes through the inner tube 121 and pushes up the imaging assembly 130 until the imaging assembly 130 partially disengages from the front guide sleeve 110, and the working instrument can smoothly pass through for operation. After the working instrument is used up and withdrawn from the inner tube 121, the imaging assembly 130 is reset to be wrapped in the front guide sleeve 110 under the restoring force of the elastic piece 140, so as to facilitate the subsequent smooth withdrawal of the intubation tube 120 from the uterus.

[0057] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model. The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. An endoscope, comprising an insertion mechanism and a handle mechanism, wherein the insertion mechanism is mounted on the handle mechanism, characterized in that, The insertion mechanism includes an imaging component, a front guide sleeve, and an intubation tube. One end of the imaging component is movably mounted on the front guide sleeve. The front guide sleeve is used to wrap part of the imaging component and limit the movement of the imaging component. When the front guide sleeve wraps around the imaging component, the outer contour of the side surface of the front guide sleeve is completely flush with the outer contour of the side surface of the imaging component. The intubation tube includes an inner tube and an outer tube. The inner tube is inserted through the outer tube. The hollow interior of the inner tube is for a working instrument to pass through and extend into the instrument channel in the uterus. The front guide sleeve is mounted at the distal port part of the intubation tube. When the working instrument passes out of the distal port of the inner tube, the imaging component is lifted and partially disengaged from the front guide sleeve.

2. The endoscope according to claim 1, wherein A shrapnel is connected between the imaging component and the intubation tube. The shrapnel is used to control the reset of the imaging component.

3. The endoscope according to claim 2, characterized in that, A first support sleeve is installed inside the distal end of the intubation tube. The first support sleeve has a shrapnel groove. One end of the shrapnel is embedded in the shrapnel groove, and the other end is mounted on the imaging component.

4. The endoscope according to claim 1, characterized in that, The other end of the imaging component protrudes from the corresponding end of the front guide sleeve.

5. The endoscope according to claim 1, characterized in that, One end of the front guide sleeve close to the intubation tube has an installation groove. The installation groove is inclined. There is a connecting column at the position of the imaging component corresponding to the installation groove. The connecting column is located in the installation groove.

6. The endoscope according to claim 1, characterized in that, The inner tube and the outer tube are eccentrically arranged.

7. The endoscope according to any one of claims 1-6, characterized in that, The handle mechanism includes a housing, a sleeve, and a driving mechanism. The sleeve is located inside the housing. The proximal end of the outer tube is located inside the sleeve. The proximal end of the inner tube passes through the sleeve and is connected to the driving mechanism. The driving mechanism is used to control the limited rotation of the intubation tube.

8. The endoscope according to claim 7, characterized in that, The driving mechanism includes a knob and a limit sleeve. The proximal end of the inner tube is fixed in the limit sleeve. The rotation of the knob drives the limit sleeve to rotate. There are a plurality of circumferentially equally spaced limit grooves on the outer wall of the limit sleeve. There are steel ball blind holes on the inner wall of the housing. An active steel ball is arranged in the steel ball blind hole. The steel ball is clamped in one of the limit grooves. A spring is connected between the steel ball and the steel ball blind hole.

9. The endoscope according to claim 8, characterized in that, The side wall of the limit sleeve also has a limit protrusion. The inner wall of the housing has a limit stop block. The limit stop block is used to limit the circumferential unrestricted rotation of the limit protrusion.

10. The endoscope according to claim 7, characterized in that, A support tube is sleeved on the proximal end of the inner tube. One end of the support tube is inserted into the sleeve, and the other end is inserted into the limit sleeve.

Images