Endoscope

Abstract

The invention 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 is mounted on the handle mechanism and comprises an imaging assembly, a front guide sleeve and an intubation tube, one end of the imaging assembly is movably mounted 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 is provided with a first tube cavity and a second tube cavity, the first tube cavity is used for allowing a working instrument to pass through an instrument channel extending into the uterus, and when the working instrument penetrates out of a far-end port of the cannula, 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, during insertion, the imaging assembly is wrapped in the front guide sleeve to form the insertion end with the small diameter, after insertion, the imaging assembly is lifted up when a working instrument passes through, so that the working instrument can be normally used, use is convenient, and the operation efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to an endoscope. Background Art

[0002] As a medical diagnostic instrument, an endoscope can enter the human body through natural cavities or minimally invasive holes. The camera encapsulated at the distal end captures images of the lesion, providing doctors with sufficient diagnostic information and treatment plans. Endoscopes are increasingly used in modern minimally invasive surgery. Hysteroscopy is a type of endoscope used to examine the interior of the uterine cavity. When used, the front of the lens enters the uterine cavity, and the lens of the hysteroscope can magnify and observe the parts inside the uterine cavity, accurately measuring them without the need for laparotomy, making the diagnosis more accurate and significantly improving the diagnostic accuracy. From an examination perspective, the hysteroscopy is the preferred examination instrument for gynecological bleeding diseases and intrauterine lesions.

[0003] During use, a hysteroscope is limited by the narrow cervical cavity of the human body. A larger diameter insertion portion may cause greater friction with human tissue, obstructing passage and increasing the patient's pain and discomfort. It may also cause damage to the internal mucosa, hindering treatment and even causing the risk of secondary injury. Therefore, the outer diameter of the insertion portion of the hysteroscope must be maintained at a certain size. The insertion portion of the endoscope is the execution end of the endoscope and requires the installation of lighting LEDs or light guides, camera modules, flushing, and disposal instrument channel tubes. These devices must be arranged inside the insertion portion, which inevitably requires a larger inner diameter insertion portion.

[0004] Therefore, there is a need for an endoscope that has an insertion portion that can smoothly pass through the narrow cervical oral canal of the human body, avoid causing secondary damage, and can reasonably arrange various devices. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an endoscope, in which an active imaging component is arranged in the insertion mechanism. During insertion, the imaging component is wrapped in a 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 so that the working instrument can be used normally. It is easy to use and can effectively improve the efficiency of the operation.

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

[0007] The present invention provides an endoscope, comprising an insertion mechanism and a handle mechanism, wherein the insertion mechanism is mounted on the handle mechanism, the insertion mechanism comprising an imaging assembly, a front guide sleeve, and an intubation tube, one end of the imaging assembly being movably mounted on the front guide sleeve, the front guide sleeve being used to wrap a portion of the imaging assembly and to limit the movement of the imaging assembly, and when the front guide sleeve is wrapped around the imaging assembly, the side outer contour of the front guide sleeve is completely flush with the side outer contour of the imaging assembly;

[0008] The cannula has a first lumen and a second lumen extending from the proximal port portion of the cannula to the distal port portion of the cannula. The first lumen is located within the second lumen. The first lumen is used for an instrument channel through which a working instrument extends into the uterus. The second lumen is used for an FPC cable to pass through the channel. The front guide sleeve is installed at the distal port portion of the cannula. When the working instrument passes through the distal port of the cannula, the imaging assembly is lifted and partially detached from the front guide sleeve.

[0009] In some embodiments, a spring is connected between the imaging component and the cannula, and the spring is used to control the resetting of the imaging component.

[0010] In some embodiments, a first support sleeve is installed inside the distal end of the cannula, and 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 first support sleeve further has a wire routing groove, and the wire routing groove is connected to the second lumen.

[0012] In some embodiments, the other end of the imaging assembly protrudes from the corresponding end of the front guide sleeve.

[0013] In some embodiments, the front guide sleeve has a mounting groove at one end close to the cannula, the mounting groove is tilted, and a connecting column is provided at a position corresponding to the mounting groove on the imaging assembly, and the connecting column is located in the mounting groove.

[0014] In some embodiments, the cannula includes an inner tube and an outer tube, the outer tube is sleeved on the inner tube, and the inner tube and the outer tube are eccentrically arranged, the gap between the inner tube and the outer tube constitutes a second lumen, and the hollow interior of the inner tube constitutes a first lumen.

[0015] In some embodiments, the handle mechanism includes a shell, a sleeve and a drive mechanism, the sleeve is located in the shell, the proximal end of the outer tube is located in the sleeve, the proximal end of the inner tube passes through the sleeve and is connected to the drive mechanism, and the drive mechanism is used to control the limited rotation of the cannula.

[0016] In some embodiments, the casing has a water injection connecting pipe and a water pumping connecting pipe, the water inlet end of the water injection connecting pipe is connected to the water injection pipe, the water outlet end of the water injection connecting pipe is connected to the second tube cavity, the water inlet end of the water pumping connecting pipe is connected to the first tube cavity, and the water outlet end of the water pumping connecting pipe is connected to the water pumping pipe.

[0017] In some embodiments, a hydraulic pressure sensor is installed on the water injection pipe.

[0018] 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, and the rotation of the knob drives the limit sleeve to rotate. The outer wall of the limit sleeve has a plurality of limit grooves equidistantly distributed along the circumference, and the inner wall of the outer shell has a steel ball blind hole. A movable steel ball is arranged in the steel ball blind hole, and the steel ball is stuck in one of the limit grooves.

[0019] In some embodiments, a spring is connected between the steel ball and the steel ball blind hole.

[0020] In some embodiments, the side wall of the limiting sleeve further has a limiting protrusion, and the inner wall of the shell has a limiting block, and the limiting block is used to limit the circumferential unlimited rotation of the limiting protrusion.

[0021] 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 of the support tube is inserted into the limiting sleeve.

[0022] In some embodiments, an eccentric tube is installed between the sleeve and the outer tube, and the eccentric tube is fixedly sleeved on the outer tube.

[0023] In the endoscope of the present invention, during the entire process of inserting the cannula into the uterus, the imaging component is partially wrapped in the front guide sleeve. At this time, the radial size of the insertion end of the cannula is relatively small, so that it can smoothly enter the interior of the uterus, and the side outer contour of the front guide sleeve is completely flush with the side outer contour of the imaging component, avoiding damage to surrounding tissues and causing secondary damage. When a working instrument is required to enter the interior of the uterus for operation, when the working instrument enters the distal end of the cannula from the first lumen, the working instrument pushes the imaging component out until it is partially separated from the front guide sleeve, and the working instrument can smoothly pass through the cannula to operate. When the working instrument is withdrawn, the imaging component is reset to the front guide sleeve. In this way, the problem of requiring a cannula with a smaller radial size to enter the interior of the uterus and requiring a cannula with a larger size to arrange the insertion of the working instrument is solved. It is easy to use and can effectively improve the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the imaging component in the endoscope being wrapped in the front guide sleeve;

[0025] Figure 2 yes Figure 1 Enlarged view of point C in the middle;

[0026] Figure 3 yes Figure 1 AA view in the;

[0027] Figure 4 yes Figure 3 Enlarged view of point D in the middle;

[0028] Figure 5 yes Figure 3 Enlarged view of point E in the middle;

[0029] Figure 6 yes Figure 1 BB view in the figure;

[0030] Figure 7 It is a structural diagram of the imaging component in the endoscope being lifted and partially separated from the front guide sleeve;

[0031] Figure 8 yes Figure 7 Enlarged view of point F in the middle;

[0032] Figure 9 yes Figure 7 Schematic diagram of the cross-sectional structure;

[0033] Figure 10 yes Figure 9 Enlarged view of point G in the middle;

[0034] Figure 11 yes Figure 9 Enlarged view of point H in the middle;

[0035] Figure 12 It is an enlarged structural diagram of the driving mechanism;

[0036] Figure 13 It is an enlarged structural diagram of the front guide sleeve;

[0037] Figure 14 is an enlarged structural diagram of the imaging component;

[0038] Figure 15 is a cross-sectional view of the casing;

[0039] Figure 16 is an enlarged structural diagram of the first support sleeve;

[0040] Figure 17 is an enlarged structural diagram of the second support sleeve;

[0041] Among them, the front guide sleeve 110, the installation groove 111, the limit piece 112, the insertion tube 120, the inner tube 121, the outer tube 122, the round hole 1221 module 131, the lens seat 132, the connecting column 1321, the LED light 133, the spring 140, the first support sleeve 151, the spring slot 1511, the cable groove 1512, the second support sleeve 152, the flat square 1521,

[0042] Housing 210, snap ring 211, steel ball blind hole 212, steel ball 213, spring 214, limit block 215, sleeve 220, slot 221, cable hole 222, water injection connecting pipe 223, water extraction connecting pipe 224, knob 231, limit sleeve 232, limit slot 2321, limit protrusion 2322, support tube 240, sealing seat 250,

[0043] Eccentric tube 300, stainless steel sleeve 400, water injection pipe 500, water extraction pipe 600, hydraulic pressure sensor 700. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Please refer to Figure 1-17The endoscope of this embodiment includes an insertion mechanism and a handle mechanism, with the insertion mechanism mounted on the handle mechanism. The insertion mechanism is used to install the imaging assembly and to pass through the cervix into the uterine cavity. The insertion mechanism includes an imaging assembly 130, a front guide sleeve 110, and an insertion tube 120. One end of the imaging assembly 130 is movably mounted on the front guide sleeve 110. Here, the imaging assembly 130 has a mounting end and a free end. The mounting end of the imaging assembly 130 is always mounted on the front guide sleeve 110, while the free end can move away from or toward the front guide sleeve 110. The front guide sleeve 110 is used to partially enclose the imaging assembly 130 and limit its movement. When the front guide sleeve 110 is wrapped around the imaging assembly 130, the side profile of the front guide sleeve 110 is completely flush with the side profile of the imaging assembly 130. The insertion tube 120 is an elongated, tubular member sized to pass through the cervix and into 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 that extends into the uterus, and the proximal end of the cannula 120 refers to the end of the cannula 120 that faces away from the distal end. The first lumen is located within the second lumen. The first lumen is used for the passage of working instruments into the uterus, while the second lumen is used for the passage of the FPC cable. The front guide sleeve 110 is mounted on 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.

[0046] The working instruments of the present invention can be used for surgery or biopsy purposes, including but not limited to various biopsy instruments (eg, forceps, graspers, scissors, etc.) with a size of 5 Fr or less.

[0047] 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 the working instrument is required to operate, the working instrument enters the first tube cavity 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 tube cavity for operation.

[0048] 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 16The 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 mounted on the imaging assembly 130 , and the other end of the spring 140 can be mounted on the imaging assembly 130 by gluing.

[0049] Please refer to Figure 10 and 14 The imaging assembly 130 includes a lens module 131, a lens mount 132, and at least one LED light 133. The lens module 131 generally includes a camera capable of taking photos, which is used to capture images of the interior of the uterus. Furthermore, the other end of the shrapnel 140 can be attached to the lens mount by gluing. The LED light 133 is used to illuminate the interior of the uterus and is arranged on the outer circumference of the lens module 131. The lens mount 132 is used to mount and secure the lens module 131 and LED light 133. The lens mount 132 has a smooth outer surface, and its outer contour is compatible with the front guide sleeve 110. Furthermore, the end of the lens mount 132 distal to the cannula 120 extends beyond the corresponding end of the front guide sleeve 110, and the radial dimension of the portion of the lens mount 132 that extends beyond the front guide sleeve 110 is less than or equal to the radial dimension of the remaining portion of the lens mount 132 (the portion of the lens mount 132 corresponding to the front guide sleeve 110). This design helps reduce the insertion end size of the insertion mechanism, facilitating smooth insertion of the insertion mechanism into the uterus.

[0050] Intubation tube 120 comprises an inner tube 121 and an outer tube 122. Outer tube 122 is sheathed over inner tube 121. The gap between inner and outer tubes 121, 122 forms the second lumen, while the hollow interior of inner tube 121 forms the first lumen. To minimize the radial dimension of intubation tube 120 and ensure smooth passage of the FPC cable and flow of injected water, inner and outer tubes 121, 122 are arranged eccentrically. The side with the larger gap between the eccentrically arranged inner and outer tubes 121, 122 serves as the primary channel of the second lumen, serving as the main passage for the FPC cable and injection water.

[0051] In order to better arrange the FPC cable connected to the lens module 131 and the LED light 133, please refer to Figure 16 The first support sleeve 151 also has a cable duct 1512 that communicates with the second lumen. To neatly arrange the FPC cables, the cable duct 1512 is positioned corresponding to the spring clip slot 1511. Specifically, the spring clip slot 1511 is located on the outer wall of the first support sleeve 151, while the cable duct 1512 is located on the inner wall of the first support sleeve 151, corresponding to the spring clip slot 1511.

[0052] Please refer to Figure 13The front guide sleeve 110 has a mounting groove 111 at one end close to the cannula 120. The mounting groove 111 is tilted and has a limiting piece 112. Figure 14 The imaging assembly 130 has a connecting post 1321 at a position corresponding to the mounting slot 111, and the connecting post 1321 is located in the mounting slot 111. The setting of the limiting piece 112 can prevent the imaging assembly 130 from falling off.

[0053] The handle mechanism includes a shell 210, a sleeve 220 and a driving mechanism. The sleeve 220 is located in the shell 210, the proximal end of the outer tube 122 is located in the sleeve 220, and 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 cannula 120, and the driving mechanism is also used for the insertion of the working instrument.

[0054] Please refer to Figure 11 An eccentric tube 300 is installed between the sleeve 220 and the outer tube 122. The eccentric tube 300 is fixedly mounted on the outer tube 122. The eccentric tube 300 seals the 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. The stainless steel sleeve 400 is fixed to 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. The outer wall of the second support sleeve 152 has a flat square 1521. The provision of the flat square 1521 facilitates the smooth passage of the FPC cable.

[0055] Please refer to Figure 5 、 Figure 6 and Figure 11 To ensure a more stable installation of the sleeve 220 within the housing 210, the sleeve 220 has a slot 221 on its circumferential outer wall. The housing 210 has a snap ring 211 at a position corresponding to the slot 221. The snap ring 211 is embedded in the slot 221. To ensure smooth entry of the FPC cable into the second lumen, a cable hole 222 is provided on the sleeve 220 for the FPC cable to pass through.

[0056] Please refer to Figure 9 、 Figure 11 、 Figure 15The casing 220 has a water injection connecting pipe 223 and a water extraction connecting pipe 224. The water inlet end of the water injection connecting pipe 223 is connected to the water injection pipe 500, and the water outlet end of the water injection connecting pipe 223 is in communication with the second lumen, that is, the water outlet end of the water injection connecting pipe 223 is in communication with the hollow interior of the casing 220, and the hollow interior of the casing 220 is in communication with the interior of the outer tube 122, that is, the hollow interior of the casing 220 is in communication with the second lumen, but the hollow interior of the casing 220 cannot be in communication with the inner tube 121. The water inlet end of the water extraction connecting pipe 224 is in communication with the first lumen, that is, the inner tube 121 has a water outlet hole at a position corresponding to the water inlet end of the water extraction connecting pipe 224, the water inlet end of the water extraction connecting pipe 224 is connected to the water outlet hole, and the water outlet end of the water extraction connecting pipe 224 is in communication with the water extraction pipe 600. In order to prevent the uterus from being excessively expanded during uterine distension, a hydraulic sensor 700 is installed on the water injection pipe to monitor the internal pressure of the uterus so as to control water injection. The hydraulic sensor 700 is located inside the housing 210.

[0057] Please refer to Figure 5 、 Figure 6 、 Figure 11 and Figure 12 The driving mechanism includes a knob 231 and a limiting sleeve 232. Both the knob 231 and the limiting sleeve 232 have a passage for the working tool to pass through. The proximal end of the inner tube 121 is fixed in the limiting sleeve 232. One end of the knob 231 is fixedly inserted into the limiting sleeve 232. The rotation of the knob 231 drives the limiting sleeve 232 to rotate. The other end of the knob 231 passes through the housing 210 for rotation operation. The outer wall of the limiting sleeve 232 has a plurality of limiting grooves 2321 distributed equidistantly along the circumference. The inner wall of the housing 210 has a steel ball blind hole 212. A movable steel ball 213 is disposed in the steel ball blind hole 212. A spring 214 is connected between the steel ball 213 and the steel ball blind hole 212. The steel ball 213 is stuck in one of the limiting grooves 2321. As the knob 231 is rotated, the limiting sleeve 232 rotates with it. During this rotation, the steel ball 213 jumps out of the original limiting groove 2321 and is squeezed into the steel ball blind hole 212 until it rotates to the appropriate position, where the steel ball 213 is embedded in the corresponding limiting groove 2321. The rotation of the limiting sleeve 232 drives the rotation of the inner tube 121. The cooperation between the steel ball blind hole 212 and the steel ball 213 provides a certain degree of damping for the rotation of the limiting sleeve 232 and the inner tube 121. To prevent the limiting sleeve 232 from rotating infinitely and causing the inner tube 121 to rotate infinitely, thereby causing confusion in the FPC wiring, the side wall of the limiting sleeve 232 is further provided with a limiting protrusion 2322, and the inner wall of the housing 210 is provided with a limiting block 215. The limiting block 215 is used to limit the unlimited circumferential rotation of the limiting protrusion 2322.

[0058] Please refer to Figure 11To 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 220, and the other end is inserted into the limit sleeve 232. A sealing seat 250 is also installed between the support tube 240 and the sleeve 220, and a sealing ring is provided in the sealing seat 250.

[0059] In the present invention, the FPC cable passes through the cable hole on the sleeve 220 inside the shell 210, enters the interior of the sleeve 220, enters the channel (i.e., the second tube cavity) between the outer tube 122 and the inner tube 121 through the flat square 1521 on the outer wall of the second support sleeve 152 between the outer tube 122 and the inner tube 121, extends to the first support sleeve 151 in the second tube cavity and passes through the cable groove of the first support sleeve 151, and is connected to the lens module 131 and the LED lamp 133 through the lens holder 132.

[0060] In the present invention, the water injection pipe 500 is connected to the external water injection mechanism, and the water extraction pipe 600 is connected to the external negative pressure suction mechanism. When water needs to be injected into the uterus, the water injected through the water injection pipe 500 flows through the gap between the outer tube 122 and the inner tube 121 (i.e., the second tube cavity) and flows out from the distal gap between the outer tube 122 and the inner tube 121. Alternatively, multiple circular holes 1221 are opened at the distal end of the outer tube 122, and the positions of the circular holes 1221 are outside the corresponding positions of the first support sleeve 151. The injected water can also flow out from the circular holes 1221. When the waste fluid in the uterus is discharged, under the action of the external negative pressure suction mechanism, the waste fluid enters the hollow interior of the inner tube 121, flows into the water extraction connecting pipe 224 through the water outlet hole, and then enters the water extraction pipe 600 and is discharged from the water extraction pipe 600.

[0061] When using the endoscope of the present invention, during the insertion of the cannula 120, the imaging assembly 130 is wrapped in the front guide sleeve 110. The radial dimension of the end of the cannula 120 is small and the outer contour is smooth, so that it can be smoothly inserted into the uterus to avoid secondary damage. When it is necessary to rotate the cannula 120 in order to use the imaging component 130 to obtain more angles of internal uterine photos, 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. The rotation of the limiting sleeve 232 drives the support tube 240 and the inner tube 121 to rotate, and then drives the eccentric tube 300 and the outer tube 122 to rotate, realizing multi-angle photography of the imaging component 130. After the imaging angle of the imaging component 130 is determined, stop the rotation of the knob 231. At this time, the steel ball enters the corresponding limiting groove 2321, limits the rotation of the limiting sleeve 232 and the inner tube 121, and prevents them from rotating automatically. When it is necessary to use a working instrument for operation, the working instrument passes through the knob 231 and the limit sleeve 232 into the inner tube 121 (i.e., the first tube cavity), and the working instrument passes through the inner tube 121 to lift the imaging component 130 until the imaging component 130 is partially separated from the front guide sleeve 110. The working instrument can then be smoothly passed out for operation. After the use of the working instrument is completed, after the working instrument is withdrawn from the inner tube 121, the imaging component 130 is reset to be wrapped in the front guide sleeve 110 under the restoring force of the shrapnel 140, so that the subsequent cannula 120 can be smoothly withdrawn from the inside of the uterus.

[0062] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. An endoscope comprising an insertion mechanism and a handle mechanism, wherein the insertion mechanism is mounted on the handle mechanism, and wherein: The insertion mechanism includes an imaging assembly, a front guide sleeve, and an insertion tube. One end of the imaging assembly is movably mounted on the front guide sleeve. The front guide sleeve is used to wrap a portion of the imaging assembly and limit the movement of the imaging assembly. When the front guide sleeve is wrapped around the imaging assembly, the side outer contour of the front guide sleeve is completely flush with the side outer contour of the imaging assembly. The cannula has a first lumen and a second lumen extending from the proximal port portion of the cannula to the distal port portion of the cannula. The first lumen is located within the second lumen. The first lumen is used for an instrument channel through which a working instrument extends into the uterus. The second lumen is used for an FPC cable to pass through the channel. The front guide sleeve is installed at the distal port portion of the cannula. When the working instrument passes through the distal port of the cannula, the imaging assembly is lifted and partially detached from the front guide sleeve.

2. The endoscope according to claim 1, wherein: A spring is connected between the imaging component and the cannula, and the spring is used to control the resetting of the imaging component.

3. The endoscope according to claim 2, wherein: A first supporting sleeve is installed inside the distal end of the cannula. The first supporting sleeve has a spring slot. One end of the spring is embedded in the spring slot, and the other end is installed on the imaging assembly.

4. The endoscope according to claim 3, wherein: The first support sleeve also has a wire routing groove, and the wire routing groove is communicated with the second tube cavity.

5. The endoscope according to claim 1, wherein The other end of the imaging assembly protrudes from the corresponding end of the front guide sleeve.

6. The endoscope according to claim 1, wherein The front guide sleeve has a mounting groove at one end close to the cannula, and the mounting groove is tilted. A connecting column is provided at a position corresponding to the mounting groove on the imaging component, and the connecting column is located in the mounting groove.

7. The endoscope according to claim 1, wherein The cannula includes an inner tube and an outer tube, the outer tube is sleeved on the inner tube, and the inner tube and the outer tube are eccentrically arranged, the gap between the inner tube and the outer tube constitutes a second lumen, and the hollow interior of the inner tube constitutes a first lumen.

8. The endoscope according to any one of claims 1 to 7, characterized in that: The handle mechanism includes a shell, a sleeve and a driving mechanism. The sleeve is located in the shell, the proximal end of the outer tube is located in 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 cannula.

9. The endoscope according to claim 8, characterized in that The sleeve is provided with an injection connecting pipe and a pumping connecting pipe, the water inlet end of the injection connecting pipe is connected to the injection pipe, the water outlet end of the injection connecting pipe is connected to the second tube cavity, the water inlet end of the pumping connecting pipe is connected to the first tube cavity, and the water outlet end of the pumping connecting pipe is connected to the pumping pipe.

10. The endoscope according to claim 9, characterized in that A hydraulic pressure sensor is installed on the water injection pipe.

11. The endoscope according to claim 8, wherein 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. The outer wall of the limit sleeve has a plurality of limit grooves distributed equidistantly along the circumference. The inner wall of the outer shell has a steel ball blind hole. A movable steel ball is arranged in the steel ball blind hole, and the steel ball is clamped in one of the limit grooves.

12. The endoscope according to claim 11, wherein: A spring is connected between the steel ball and the steel ball blind hole.

13. The endoscope according to claim 11, wherein: The side wall of the limiting sleeve is further provided with a limiting protrusion, and the inner wall of the shell is provided with a limiting block, and the limiting block is used to limit the circumferential unlimited rotation of the limiting protrusion.

14. The endoscope according to claim 11, wherein The proximal end of the inner tube is sleeved with a support tube, one end of the support tube is inserted into the sleeve, and the other end is inserted into the limiting sleeve.

15. The endoscope according to claim 8, wherein An eccentric tube is installed between the sleeve and the outer tube, and the eccentric tube is fixedly sleeved on the outer tube.

Images