Uterine cavity endoscope

Abstract

The invention discloses a uterine cavity endoscope which comprises a shell, a water injection mechanism used for injecting liquid medicine and the like into a uterine cavity, a water return mechanism used for sucking liquid such as blood in the uterine cavity, an instrument channel assembly used for enabling an instrument to stretch into the uterine cavity and a front end lens assembly used for obtaining image information in the uterine cavity. Meanwhile, the front-end lens assembly is connected with at least one of the water return pipe and the water injection pipe and communicated with the water return gap, and liquid can be injected into the uterine cavity or discharged out of the uterine cavity through the front-end lens assembly. Besides, by arranging the instrument channel assembly, the instrument channel assembly and the water injection pipe are communicated to form an instrument channel, and an instrument can enter the uterine cavity through the water injection pipe, so that water injection, water return, camera shooting and instrument entering are integrated into one tubular structure, the structure is more compact, the size of the uterine cavity endoscope is effectively reduced, and discomfort of a patient is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a hysteroscopic endoscope. Background Art

[0002] Hysteroscopy, also known as hysteroscopy, is a new, minimally invasive gynecological diagnostic and treatment technology. It is a fiber-light endoscope used for intrauterine examination and treatment. It includes a hysteroscope, an energy system, a light source system, a perfusion system and an imaging system. It uses the front part of the scope to enter the uterine cavity and has a magnifying effect on the observed area. It is the preferred examination method for gynecological hemorrhagic diseases and intrauterine lesions with its intuitive and accurate nature.

[0003] During the process of hysteroscopic examination, the part with the lens at the front end of the hysteroscope needs to enter the patient's body, inject physiological saline or auxiliary treatment liquid into the intrauterine environment, and obtain image information of the intrauterine environment through the lens assembly for the doctor. The doctor can also choose appropriate instruments according to the image information, such as biopsy forceps, etc., enter the uterine cavity through the hysteroscope to perform operations. During the operation, blood and other liquids in the intrauterine environment need to be discharged.

[0004] However, due to the complex functional structure design of traditional hysteroscopes, most hysteroscopes are large in size and not easy to operate, which not only causes greater discomfort to patients but also restricts some operations of doctors. Summary of the invention

[0005] The object of the present invention is to provide a hysteroscopic endoscope, aiming to solve at least one technical problem in the above-mentioned prior art.

[0006] In order to solve the above technical problems, the object of the present invention is achieved through the following technical solutions: a hysteroscopic endoscope is provided, comprising: A housing having a mounting cavity therein; A water injection mechanism, comprising a water injection pipe and a water injection assembly at least partially disposed in the installation cavity and connected to the water injection pipe; A water return mechanism, comprising a water return pipe and a water return assembly at least partially disposed in the installation cavity and connected to the water return pipe, wherein the water return pipe is sleeved on the water injection pipe and a water return gap is disposed between the outer wall of the water injection pipe and the inner wall of the water return pipe, wherein the water return gap is configured as a channel for discharging liquid in the uterine cavity; An instrument channel assembly connected to the water injection assembly in the installation cavity of the housing, the instrument channel assembly having an instrument inlet channel for instruments to enter, the instrument inlet channel being in communication with the water injection pipe to form an instrument channel for instruments to pass through; A front-end lens assembly is connected to the water inlet end of at least one of the return water pipe and the injection water pipe, and the front-end lens assembly is configured to allow liquid in the injection water pipe to enter the uterine cavity through the front-end lens assembly and to allow liquid in the uterine cavity to enter the return water gap through the front-end lens assembly.

[0007] Furthermore, the front-end lens assembly includes: The front end cover has a first cavity and a second cavity, wherein the first cavity is connected to the outside through the imaging hole, and the second cavity is connected to the outside through the first hole; an optical imaging assembly disposed in the first cavity, the optical imaging assembly being configured to form an image through the imaging hole; A connecting tube body having a first end opening and a second end opening facing differently from the first end opening, wherein the connecting tube body is configured to connect the front end cover and the return pipe, wherein the first end opening has a first center line, and the second end opening has a second center line, and the first end opening is connected to the front end cover, and when viewed along the axial direction of the imaging hole, the first center line is offset from the second center line.

[0008] Furthermore, the connecting tube body also includes a connecting tube partition, which extends from the first end opening to the second end opening to form a third channel and a fourth channel that are independent of each other, one end of the third channel is configured to be connected to at least the second cavity, and the other end of the third channel is configured to be connected to the return water gap of the return water pipe, one end of the fourth channel is configured to be connected to the intrauterine environment, and the other end of the fourth channel is configured to be connected to the water injection pipe.

[0009] Further, when viewed along the axial direction of the imaging hole, the first cavity and the second cavity do not overlap with the second channel.

[0010] Furthermore, the instrument channel assembly comprises: The first plug-in is at least partially arranged in the installation cavity of the shell. The first plug-in has an instrument inlet channel and a first pipe passage configured to connect the instrument inlet channel with the water injection pipe. The first pipe passage is also configured to connect the water injection assembly with the water injection pipe.

[0011] Furthermore, the instrument channel assembly further comprises: A rotating member, one end of which is connected to an end of the first plug-in away from the water injection pipe, and the other end of which at least partially extends to the outside of the shell, wherein the rotating member has an instrument guide channel connected to the instrument inlet channel, and the rotating member is configured so that when the rotating member is driven to rotate, the first plug-in and the water injection pipe rotate synchronously with the rotating member.

[0012] Furthermore, the first plug-in further comprises a first one-way valve, which is disposed in the instrument inlet channel and is configured to prevent fluid from flowing from the first tube passage to the instrument inlet channel when an instrument passes through the first one-way valve.

[0013] Furthermore, at least two first limit blocks are provided on the inner wall of the shell located in the installation cavity, and the at least two first limit blocks are arranged at an angle to form a limit interval. At least one second limit block is provided on the first plug-in, and the at least one second limit block is arranged in the limit interval. The at least one second limit block is configured to contact with the at least two first limit blocks when the rotating part rotates to limit the rotation angle of the first plug-in.

[0014] Furthermore, the water injection assembly comprises: A water inlet base, having a water inlet cavity therein, the water inlet cavity being configured to accommodate at least a portion of the first plug-in, the water inlet cavity having a first water inlet end; A water inlet pipe, one end of which is connected to the first water inlet end of the water inlet base and communicated with the water inlet cavity; The portion of the first plug-in located in the water inlet cavity is provided with at least one water inlet communication hole, and the water inlet communication hole is configured to communicate the first pipe passage with the water inlet cavity.

[0015] Furthermore, the water return component comprises: A water return base is arranged at one side of the water inlet base, wherein the water return base has a water return cavity inside, wherein the water return cavity has a second water inlet end and a second water outlet end, and the second water inlet end is connected to the water return pipe; A water outlet pipe, one end of which is connected to the second water outlet end of the water return base; A water return plug is at least partially disposed in the water return cavity of the water return base, and the water return plug has a second pipe passage configured to connect the water return gap with the water return cavity, and the water injection pipe is configured to pass through the water return base via the second pipe passage.

[0016] The embodiment of the present invention provides a hysteroscopic endoscope, which is provided by placing a water return pipe on a water injection pipe to form a water return gap between the two, and connecting the front end lens assembly to at least one of the water return pipe and the water injection pipe and communicating with the water return gap, so that liquid can be injected into or discharged from the uterine cavity through the front end lens assembly. In addition, an instrument channel assembly is provided so that it is connected with the water injection pipe to form an instrument channel, so that instruments can enter the uterine cavity through the water injection pipe, thereby integrating water injection, water return, video recording, and instrument entry into a tubular structure, which is more compact, effectively reducing the size of the hysteroscopic endoscope and reducing patient discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the overall structure of a hysteroscopic endoscope provided in an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 A schematic cross-sectional structure diagram of ; Figure 3 A schematic diagram of the structure of a hysteroendoscope provided by an embodiment of the present invention with the shell removed; Figure 4 The embodiment of the present invention provides Figure 3 A schematic cross-sectional structure diagram of ; Figure 5 The embodiment of the present invention provides Figure 4 A schematic diagram of the enlarged structure of part A; Figure 6 The embodiment of the present invention provides Figure 4 A schematic diagram of the enlarged structure of part B; Figure 7 A schematic diagram of the structure of a front-end lens assembly provided in an embodiment of the present invention; Figure 8 A schematic structural diagram of a front-end lens assembly from another perspective provided by an embodiment of the present invention; Fig. 9 The embodiment of the present invention provides Figure 7 A schematic cross-sectional structure diagram of ; Fig.10 A schematic structural diagram of a front end cover provided by an embodiment of the present invention observed along the axis direction of the imaging hole.

[0019] Fig.11 A schematic diagram of the exploded structure of a front-end lens assembly provided by an embodiment of the present invention; Fig.12 A schematic diagram of an exploded structure of a lens mounting structure provided by an embodiment of the present invention; Fig.13 A schematic diagram of an exploded structure from another perspective of the front-end mounting structure provided in an embodiment of the present invention.

[0020] Description of the symbols in the figure: Shell; 11. Installation cavity; 12. Grip; 13. Water inlet control valve; 14. Water outlet control valve; Water injection mechanism; 21, water injection pipe; 22, water injection assembly; 221, water inlet base; 2211, water inlet cavity; 2212, first water inlet end; 2213, first water outlet end; 222, water inlet pipe; Water return mechanism; 31, water return pipe; 32, water return assembly; 321, water return base; 3211, water return chamber; 3212, second water inlet end; 3213, second water outlet end; 322, water return plug-in; 3221, second pipe passage; 3222, water return communication hole; 33, water return gap; 34, water outlet pipe; Instrument channel assembly; 41, first plug-in; 411, instrument inlet channel; 412, first tube passage; 413, instrument guide; 414, first one-way valve; 415, second one-way valve; 416, water inlet communication hole; 42, rotating member; 421, instrument guide channel; 43, channel inlet; 44, channel outlet; Front end lens assembly; 51, front end cover; 511, first cavity; 5111, imaging hole; 512, second cavity; 5121, first hole; 513, end cover partition; 52, optical imaging assembly; 521, lens body; 522, light source; 53, connecting tube body; 531, first end opening; 532, second end opening; 533, connecting tube partition; 534, third channel; 535, fourth channel; 54, insert; 541, first plug block; 5411, first surface; 542, second plug block; 5421, second surface; 55, convex portion; 56, concave portion; 57, tube member; 58, water-passing gap. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] Figure 1 and Figure 2 A hysteroscopic endoscope according to one embodiment of the present invention has an overall shape of a firearm and includes a housing 1 , a water injection mechanism 2 , a water return mechanism 3 , an instrument channel assembly 4 and a front end lens assembly 5 .

[0026] The housing 1 has an installation cavity 11 inside, which is used to install the water injection mechanism 2, the water return mechanism 3 and the instrument channel assembly 4. Generally, the housing 1 is formed by two half shells detachably connected by a connection structure such as a buckle or a bolt to form a housing 1 with an installation cavity 11 inside. Of course, the housing 1 can also be composed of more than two components to form the above-mentioned structure with the installation cavity 11 inside, and the present invention is not specifically limited here.

[0027] The water injection mechanism 2 and the water return mechanism 3 are at least partially arranged inside the installation cavity 11 of the shell 1. The two constitute the water path structure of the hysteroscopic endoscope, realizing the function of injecting liquids such as physiological saline and medicine into the uterine cavity environment, and realizing the function of discharging blood, physiological saline, medicine and other liquids outside the uterine cavity. The specific structure of the water injection mechanism 2 and the water return mechanism 3 will be described in detail below.

[0028] See also Figures 3 to 5 The water injection mechanism 2 includes a water injection pipe 21 and a water injection assembly 22 which is at least partially disposed in the installation cavity 11 and communicated with the water injection pipe 21 .

[0029] The water injection assembly 22 includes a water inlet base 221 and a water inlet pipe 222. The water inlet base 221 has a water inlet cavity 2211 inside. The water inlet cavity 2211 has a first water inlet end 2212. The first water inlet end 2212 is connected to the water inlet pipe 222. The water inlet pipe 222 extends to the outside of the housing 1 and is connected to a water source. Usually, the water source can be a water pump with pumping capacity. Through the pumping of the water pump, liquids such as physiological saline and liquid medicine are pumped into the water inlet cavity 2211 of the water inlet base 221 through the water inlet pipe 222 and the first water inlet end 2212.

[0030] Typically, the housing 1 is in the shape of a gun to provide a gripping portion 12 for medical personnel to hold. In order to reasonably arrange the various mechanisms of the hysteroscopic endoscope, the water inlet pipe 222 is preferably arranged in the gripping portion 12. Therefore, the water inlet pipe 222 preferably adopts a flexible pipe to adapt to the shape and structure of the gripping portion 12 and reasonably arrange the direction of the water inlet pipe 222.

[0031] One end of the flexible tube is sealed and connected to the first water inlet end 2212, and the other end of the flexible tube passes through the housing 1 and extends to the outside of the housing 1 to be connected to the water source. Generally, when the hysteroscopic endoscope is actually used, it is necessary to set a water inlet control valve 13 between the water inlet pipe 222 and the water source to control the flow in the water inlet pipe 222 or close the water inlet pipe 222. In this embodiment, the lower end of the gripping portion 12 of the housing 1 is provided with a waterway opening, through which the water inlet pipe 222 or the water inlet control valve 13 can pass. In order to fix the water inlet control valve 13, in this embodiment, the water inlet control valve 13 is configured to pass through the waterway opening and partially enter the installation cavity 11 of the housing 1, and the part of the water inlet control valve 13 entering the installation cavity 11 of the housing 1 is connected to the water inlet pipe 222, and the control switch of the water inlet control valve 13 is arranged outside the housing 1. When it is necessary to adjust the flow of the water inlet pipe 222 or close the water inlet pipe 222, the medical staff can manually control the control switch of the water inlet control valve 13 to achieve the above effect.

[0032] In this embodiment, the water inlet base 221 is a tubular structure as a whole, and is detachably mounted on the inner wall of the housing 1 by means of a plurality of screws. Specifically, a plurality of pillars with internal threads are provided on the inner wall of the housing 1, and the water inlet base 221 is detachably fixed to the plurality of pillars by means of screws.

[0033] Specifically, in this embodiment, one end of the water inlet base 221 is provided with an opening, and the other end is provided with a first water outlet 2213. The end provided with the opening can be connected to the instrument channel assembly 4, and when the instrument channel assembly 4 is connected to the above-mentioned opening, the instrument channel assembly 4 is sealed and connected to the opening, so that a water inlet cavity 2211 that can accommodate liquid is formed inside the water inlet base 221. The water injection pipe 21 is connected to the first water outlet 2213 of the water inlet cavity 2211 of the water inlet base 221, and the water injection pipe 21 can extend in a direction away from the water inlet base 221, so that the liquid contained in the water inlet cavity 2211 can be injected into the intrauterine environment through the water injection pipe 21.

[0034] More specifically, the water inlet base 221 also includes a water inlet plug-in arranged in the water inlet cavity 2211 of the water inlet base 221, the water inlet plug-in having a first pipe passage 412 and at least one water inlet connecting hole 416, at least one water inlet connecting hole 416 being configured to connect the water inlet cavity 2211 with the first pipe passage 412, and one end of the water injection pipe 21 is connected to the first pipe passage 412.

[0035] The water inlet plug is inserted into the water inlet cavity 2211 from the opening of the water inlet base 221 , and the water inlet plug is sealed and connected to the opening.

[0036] The first tube passage 412 is formed in the portion of the water inlet plug-in located in the water inlet cavity 2211, and at least one water inlet connecting hole 416 is provided on the wall of the first tube passage 412, so as to connect the water inlet cavity 2211 with the first tube passage 412. In this embodiment, two water inlet connecting holes 416 are provided, and are symmetrically arranged on the wall of the first tube passage 412.

[0037] The water injection pipe 21 is connected to the first pipe passage 412 of the water inlet plug-in to communicate with the water inlet chamber 2211. That is, in this embodiment, one end of the first pipe passage 412 connected to the water injection pipe 21 forms the first water outlet end 2213 of the above-mentioned water inlet chamber 2211.

[0038] See also Figures 3 to 6 The water return mechanism 3 includes a water return pipe 31 and a water return assembly 32 which is at least partially disposed in the installation cavity 11 and communicated with the water return pipe 31 .

[0039] The water return assembly 32 includes a water return base 321, a water outlet pipe 34, and a water return plug-in 322. The water return base 321 is disposed on one side of the water inlet base 221, and the water return base 321 has a water return chamber 3211 inside, and the water return chamber 3211 has a second water inlet end 3212 and a second water outlet end 3213. The second water inlet end 3212 is connected to the water return pipe 31, and the second water outlet end 3213 is connected to the water outlet pipe 34.

[0040] The water outlet pipe 34 extends to the outside of the housing 1 and is connected to the pumping mechanism. Generally, the pumping mechanism can be a water pump with pumping capability, which generates a certain suction force to pump out the blood, saline, medicine and other liquids in the intrauterine environment through the return pipe 31, the second water inlet end 3212, the return water cavity 3211 and the second water outlet end 3213.

[0041] Usually, the housing 1 is in the shape of a gun to provide a gripping portion 12 for medical personnel to hold. In order to reasonably arrange the various mechanisms of the hysteroscopic endoscope, the water outlet pipe 34 is preferably arranged in the gripping portion 12. Therefore, the water outlet pipe 34 preferably adopts a flexible pipe to adapt to the shape and structure of the gripping portion 12 and reasonably arrange the direction of the water inlet and outlet pipes 34.

[0042] One end of the flexible tube is sealed and connected to the second water outlet end 3213, and the other end of the flexible tube passes through the housing 1 and extends to the outside of the housing 1 to be connected to the pumping mechanism. Usually, when the hysteroscopic endoscope is actually used, it is necessary to set a water outlet control valve 14 between the water outlet pipe 34 and the pumping mechanism to control the flow in the water outlet pipe 34 or close the water outlet pipe 34. In this embodiment, the lower end of the gripping portion 12 of the housing 1 is provided with a waterway opening, through which the water outlet pipe 34 or the water outlet control valve 14 can pass. In order to fix the water outlet control valve 14, in this embodiment, the water outlet control valve 14 is configured to pass through the waterway opening and partially enter the installation cavity 11 of the housing 1, and the part of the water outlet control valve 14 entering the installation cavity 11 of the housing 1 is connected to the water outlet pipe 34, and the control switch of the water outlet control valve 14 is arranged outside the housing 1. When it is necessary to adjust the flow of the water outlet pipe 34 or close the water outlet pipe 34, the medical staff can manually control the control switch of the water outlet control valve 14 to achieve the above effect.

[0043] In the present embodiment, since the water inlet pipe 222 and the water outlet pipe 34 are both arranged at the lower end of the gripping portion 12 of the shell 1, in order to facilitate processing and ensure a certain structural strength, the water inlet pipe 222 and the water outlet pipe 34 share the same water channel opening, and the water inlet control valve 13 and the water outlet control valve 14 are installed on the same valve base. In this way, the water inlet control valve 13 and the water outlet control valve 14 can be installed at the water channel opening of the shell 1 with only one installation operation.

[0044] Please continue reading Figure 2 and Figure 3 In this embodiment, the water return base 321 is a tubular structure as a whole, and is detachably mounted on the inner wall of the housing 1 by means of a plurality of screws. Specifically, a plurality of pillars with internal threads are provided on the inner wall of the housing 1, and the water return base 321 is detachably fixed to the plurality of pillars by means of screws. In this embodiment, the structure of the water return base 321 is consistent with that of the water inlet base 221, and the difference lies in the difference in the structural dimensions of some positions. Such a design can not only reduce the difficulty of design and development, but also play a certain foolproof role in the production and assembly process.

[0045] Specifically, in this embodiment, one end of the water return base 321 is provided with an opening, and the other end is provided with a second water outlet 3213. The end provided with the opening can be connected to the water return plug-in 322, and when the water return plug-in 322 is connected to the above-mentioned opening, the water return plug-in 322 is sealedly connected to the opening, so that a water return cavity 3211 that can accommodate liquid is formed inside the water return base 321. The water return pipe 31 is connected to the second water outlet 3213 of the water return cavity 3211 of the water return base 321, and the water return pipe 31 can extend in a direction away from the water return base 321, so that the liquid in the intrauterine environment can flow back to the water return cavity 3211 of the water return base 321 via the water return pipe 31.

[0046] In this embodiment, the return water plug-in 322 is at least partially arranged in the return water chamber 3211 of the return water base 321, and the return water plug-in 322 has a second pipe passage 3221. The water injection pipe 21 is constructed to pass through the return water base 321 via the second pipe passage 3221, and the water injection pipe 21 penetrates into the connection of the second pipe passage 3221 and is sealed to ensure the sealing of the connection between the second pipe passage 3221 and the water injection pipe 21, that is, to ensure the sealing of the return water chamber 3211.

[0047] At the same time, at least one water return connecting hole 3222 is provided on the water return plug 322, and the at least one water return connecting hole 3222 is configured to connect the water return chamber 3211 with the second pipe passage 3221, and one end of the water return pipe 31 is connected to the second pipe passage 3221 of the water return plug 322. In this embodiment, one end of the second pipe passage 3221 connected to the water return pipe 31 forms the second water inlet end 3212.

[0048] For details, please refer to Figure 2-Figure 6 The water injection pipe 21 passes through the above-mentioned second tube channel 3221 and then enters the return water pipe 31, that is, the return water pipe 31 is sleeved on the water injection pipe 21 and a return water gap 33 is provided between the outer wall of the water injection pipe 21 and the inner wall of the return water pipe 31. The second tube channel 3221 is constructed to connect the return water gap 33 and the return water cavity 3211, so that the liquid in the intrauterine environment can flow back to the second tube channel 3221 through the above-mentioned return water gap 33, and can enter the return water cavity 3211 through the return water connection.

[0049] In this embodiment, the water injection pipe 21 is arranged in the second pipe passage 3221, and a water return gap 33 is also arranged between the water injection pipe 21 and the wall of the second pipe passage 3221. The water return communication hole 3222 is arranged on the wall of the second pipe passage 3221, and in this embodiment, two water return communication holes 3222 are symmetrically arranged.

[0050] The injection pipe 21 and the return pipe 31 extend together in a direction away from the water inlet base 221. When injecting water, liquid is ejected from the injection pipe 21, and when returning water, liquid enters from the return gap 33 of the return pipe 31. In this embodiment, the injection pipe 21 and the return pipe 31 are both hard pipes.

[0051] See also Figure 2 , Figure 4 and Figure 5 The hysteroscopic endoscope is also provided with an instrument channel assembly 4, which is connected to the water injection assembly 22 in the mounting cavity 11 of the shell 1. The instrument channel assembly 4 has an instrument entrance channel 411 for instruments to enter. The instrument entrance channel 411 is connected to the water injection pipe 21 to form an instrument channel for instruments to pass through.

[0052] Specifically, the instrument channel assembly 4 is connected to the water inlet base 221 and at least partially extends into the water inlet chamber 2211. One end of the instrument channel assembly 4 extending into the water inlet chamber 2211 has a channel outlet 44 connected to the water inlet end of the water injection pipe 21. The other end of the instrument channel assembly 4 located outside the water inlet chamber 2211 has a channel inlet 43. A first channel for the instrument to pass through is formed between the channel inlet 43 and the channel outlet 44. A second channel for the instrument to pass through is formed between the water inlet end and the water outlet end of the water injection pipe 21.

[0053] The first channel and the second channel together form an instrument channel for instruments to pass through the outside of the shell 1 and through the inside of the shell 1 to enter the intrauterine environment.

[0054] In this embodiment, the instrument channel assembly 4 includes a first plug-in 41, which is at least partially arranged in the installation cavity 11 of the shell 1. The first plug-in 41 has an instrument inlet channel 411 and a first pipe channel 412 configured to connect the instrument inlet channel 411 with the water injection pipe 21. The first pipe channel 412 is also configured to connect the water injection assembly 22 with the water injection pipe 21.

[0055] Specifically, the first plug 41 is inserted into the water inlet cavity 2211 from the opening of the water inlet base 221, and the first plug 41 is sealed and connected to the opening, and the portion of the first plug 41 inserted into the water inlet cavity 2211 forms a first pipe passage 412, the outlet of the first pipe passage 412 is the channel outlet 44, and the channel outlet 44 is connected to the water injection pipe 21. That is, the portion of the first plug 41 located in the water inlet cavity 2211 is equivalent to the aforementioned water inlet plug.

[0056] The portion of the first plug-in 41 located outside the water inlet cavity 2211 is formed with an instrument inlet channel 411, and the entrance of the instrument inlet channel 411 is the above-mentioned channel inlet 43. The diameter of the channel inlet 43 is larger than the diameter of the channel outlet 44, and the instrument inlet channel 411 is generally in a bell-mouth shape as a whole, and the bell-mouth shape forms an instrument guide portion 413 that guides the instrument and guides the instrument to be inserted into the first tube passage 412, so as to facilitate the insertion of the instrument. In other words, the first plug-in 41 also includes an instrument guide portion 413 that is connected to the end of the first tube passage 412 away from the water injection pipe 21, and the instrument guide portion 413 is configured to guide the instrument and guide the instrument to be inserted into the first tube passage 412, that is, the instrument inlet channel 411 is formed in the instrument guide portion 413, and the instrument guide portion 413 is a part of the first plug-in 41.

[0057] In this embodiment, the instrument guide portion 413 (ie, the instrument inlet channel 411 ) is integrally connected with the portion of the first plug-in unit 41 located in the water inlet cavity 2211 to form the first plug-in unit 41 .

[0058] Therefore, a first passage for the instrument to pass through is formed between the instrument entrance passage 411 (i.e., the passage entrance 43) and the first tube passage 412 (i.e., the passage outlet 44), and a second passage for the instrument to pass through is formed between the water inlet end and the water outlet end of the water injection pipe 21. The instrument enters the intrauterine environment from the first passage and from the second passage.

[0059] Please continue reading Figure 5 In order to prevent the liquid in the water inlet chamber 2211 from flowing back to the instrument inlet channel 411 of the instrument guide part 413 and causing leakage, a first one-way valve 414 is provided in the instrument guide part 413. The first one-way valve 414 is configured to prevent the fluid from flowing from the first tube channel 412 to the instrument guide part 413 when the instrument passes through the first one-way valve 414.

[0060] The first one-way valve 414 is a first elastomer with a certain hardness. The first elastomer can be abutted against the connection between the instrument guide part 413 and the first tube channel 412. The first elastomer is provided with a scratch penetrating the first elastomer at the end facing the first tube channel 412. The scratch can be elastically deformed to form a through hole, and is constructed to prevent fluid from flowing from the first tube channel 412 to the instrument guide part 413 when the instrument passes through the through hole.

[0061] In this embodiment, the first elastomer is silicone or rubber with a certain hardness, that is, the first one-way valve 414 is made of silicone or rubber with a certain hardness and elastic deformation ability, and a cross scratch is set on the end of the first elastomer facing the first tube channel 412. The cross scratch penetrates the first elastomer, so that when the instrument passes through the cross scratch of the first elastomer, the cross scratch can be elastically deformed and form a through hole. Since the first elastomer has sufficient elasticity at the cross scratch, the through hole formed by the first elastomer can form a sufficient seal with the instrument, thereby preventing the fluid from flowing from the first tube channel 412 to the instrument guide part 413, thereby achieving a one-way conduction effect.

[0062] Specifically, a first step portion is provided in the instrument guide portion 413, and the shape of the first step portion is adapted to the shape of the first one-way valve 414, so that when the first elastomer is installed in the first step portion, the first elastomer can be pressed against the inner wall of the instrument guide portion 413 located on the first step portion under the action of its own elasticity.

[0063] Please continue reading Figure 5In order to further improve the sealing effect, a second one-way valve 415 is also provided in the instrument guide portion 413, the first one-way valve 414 is provided between the first tube passage 412 and the second one-way valve 415, and the second one-way valve 415 is configured to prevent the fluid from flowing from the first one-way valve 414 to the second one-way valve 415 when the instrument passes through the second one-way valve 415.

[0064] Specifically, the second one-way valve 415 is disposed in the first step portion and is disposed in close contact with the first one-way valve 414. The second one-way valve 415 is a second elastic body with a certain hardness, and a small hole is disposed at one end of the second elastic body facing the first one-way valve 414 for instruments to pass through.

[0065] In this embodiment, the diameter of the small hole is 1 mm. Of course, in other embodiments, the diameter of the small hole can also be other sizes, such as 1.5 mm, 2 mm, etc. When the instrument passes through the small hole, it can squeeze the inner wall of the small hole, causing the small hole to deform elastically, thereby forming a sufficient seal between the inner wall of the small hole and the instrument, thereby achieving a good one-way conduction effect.

[0066] Please continue reading Figure 5 The instrument channel assembly 4 also includes a rotating member 42, one end of which is connected to an end of the first plug-in 41 away from the water injection pipe 21, and the other end at least partially extends to the outside of the shell 1, and the rotating member 42 has an instrument guide channel 421 connected to the instrument inlet channel 411. The rotating member 42 is configured such that when the rotating member 42 is driven to rotate, the first plug-in 41 and the water injection pipe 21 rotate synchronously with the rotating member 42.

[0067] In this embodiment, the overall shape of the rotating member 42 is roughly a bell-mouth shape, one end of which is connected to the instrument guide portion 413 located in the installation cavity 11 of the shell 1, and the other end extends to the outside of the shell 1. The part of the rotating member 42 extending to the outside of the shell 1 has a bell-mouth, which forms the above-mentioned instrument guide channel 421.

[0068] Furthermore, in this embodiment, one end of the rotating member 42 located outside the housing 1 is bent outwardly along the radial direction of the bell mouth to form a knob portion that can be manually operated by the user, and the knob portion is provided with corresponding anti-slip grooves for easy operation by the user. The user can drive the first plug-in 41 to rotate by turning the knob portion, driving the water injection pipe 21 and the water return pipe 31 to rotate synchronously, and then driving the front end lens assembly 5 at the end of the water return pipe 31 to rotate, which is beneficial for the user to find a suitable shooting angle or a suitable instrument operation angle.

[0069] Specifically, a second step portion is provided in the instrument guide portion 413, the second step portion is adjacent to the first step portion and is provided on the side of the first step portion away from the first tube passage 412, and the diameter of the second step portion is greater than the diameter of the first step portion. One end of the rotating member 42 connected to the instrument guide portion 413 is provided in the second step portion, and the rotating member 42 can be connected and fixed to the inner wall of the instrument guide portion 413 by a snap-fit ​​structure or a thread or a bolt. See also Figures 2 to 4 At least two first limit blocks are arranged on the inner wall of the shell 1 located in the installation cavity 11, and the at least two first limit blocks are arranged at an angle to form a limit interval. At least one second limit block is arranged on the first plug-in 41, and the at least one second limit block is arranged in the limit interval. The at least one second limit block is configured to contact with the at least two first limit blocks when the rotating member 42 rotates to limit the rotation angle of the first plug-in 41.

[0070] In this embodiment, two first limit blocks are provided, and the two first limit blocks are provided on the inner wall of the installation cavity 11 at an angle of 180°. One second limit block is provided, and the second limit block is provided on the outer wall of the instrument guide portion 413 of the first plug-in 41. When the user rotates the rotating member 42, the second limit block can move within the limit interval formed between the two first limit blocks, and can contact one of the two first limit blocks when the rotating member 42 rotates to a certain angle, thereby achieving the purpose of limiting the rotation angle of the rotating member 42, so as to prevent the water injection pipe 21, the water return pipe 31, and the front end lens assembly 5 from excessive rotation, tearing off the internal wires, and causing the flexible tube to be disconnected due to excessive rotation and leaking.

[0071] As designed above, in this embodiment, the return pipe 31 is sleeved on the injection pipe 21 to form a return gap 33 between the two, and the front lens assembly 5 is connected to at least one of the return pipe 31 and the injection pipe 21 and connected to the return gap 33, so that liquid can be injected into or discharged from the uterine cavity through the front lens assembly 5. In addition, an instrument channel assembly 4 is provided so that it forms an instrument channel together with the injection pipe 21, so that instruments can enter the uterine cavity through the injection pipe 21, thereby integrating water injection, return water, video recording, and instrument entry into a tubular structure, which is more compact, effectively reducing the volume of the hysteroscopic endoscope and reducing patient discomfort.

[0072] See below Figure 2 , Figures 7 to 13 The front end lens assembly 5 includes a front end cover 51, an optical imaging assembly 52 and a connecting tube body 53.

[0073] The front end cover 51 has a first cavity 511 and a second cavity 512. The first cavity 511 is connected to the outside through an imaging hole 5111, and the second cavity 512 is connected to the outside through a first hole 5121. The optical imaging component 52 is disposed in the first cavity 511, and the optical imaging component 52 is configured to form an image through the imaging hole 5111. The connecting tube body 53 has a first end opening 531 and a second end opening 532 that faces differently from the first end opening 531. The connecting tube body 53 is configured to connect the front end cover 51 and the return pipe 31. The first end opening 531 has a first center line, and the second end opening 532 has a second center line. The first end opening 531 is connected to the front end cover 51. When observed along the axial direction of the imaging hole 5111, the first center line is offset from the second center line.

[0074] In this embodiment, by setting the first center line of the first end opening 531 to deviate from the second center line of the second end opening 532, the overall shape of the connecting tube body 53 is curved or streamlined, that is, the imaging hole 5111 and the water inlet end of the return pipe 31 and the water outlet end of the water injection pipe 21 are deviated from each other and are not on the same straight line. With this design, the front lens assembly 5 will not hinder the operation of the instrument.

[0075] Further, the connecting tube body 53 further comprises a connecting tube partition 533, which extends from the first end opening 531 to the second end opening 532 to form a third channel 534 and a fourth channel 535 which are independent of each other, one end of the third channel 534 is configured to communicate with at least the second cavity 512, the other end of the third channel 534 is configured to communicate with the return water gap 33 of the return water pipe 31, one end of the fourth channel 535 is configured to communicate with the intrauterine environment, and the other end of the fourth channel 535 is configured to communicate with the water injection pipe 21. With such a design, the liquid in the intrauterine environment can flow back to the return water gap 33 through the third channel 534, and then be discharged through the return water gap 33, the return water cavity 3211, and the water outlet pipe 34. Physiological saline, liquid medicine, etc. can be discharged into the intrauterine environment through the water inlet pipe 222, the water inlet cavity 2211, the water injection pipe 21, and the fourth channel 535.

[0076] Furthermore, the front end cover 51 further includes an end cover partition 513, and the end cover partition 513 is configured to separate the first cavity 511 from the second cavity 512, and the first cavity 511 and the second cavity 512 do not overlap when viewed along the axial direction of the imaging hole 5111. In this embodiment, although the end cover partition 513 separates the first cavity 511 from the second cavity 512, the first cavity 511 and the second cavity 512 are simultaneously connected to the third channel 534, that is, the first cavity 511 and the second cavity 512 are not completely independent of each other.

[0077] In this embodiment, when observing along the axial direction of the imaging hole 5111, the first cavity 511 and the second cavity 512 do not overlap. With this design, when the optical imaging component 52 is installed in the first cavity 511, the optical imaging component 52 will not hinder the backflow of the liquid in the first hole 5121 and the second cavity 512, and will not affect the water return effect.

[0078] Furthermore, when observed along the axial direction of the imaging hole 5111, the first cavity 511 and the second cavity 512 do not overlap with the fourth channel 535. With such a design, the fourth channel 535, i.e., the water outlet end of the water injection pipe 21, is completely located on one side of the first cavity 511 and the second cavity 512, which will not interfere with the operation of the instrument and the injection of liquids such as saline, and can compress the volume of the front-end lens assembly 5 on the basis of ensuring that the instrument and the water injection effect are not affected, and minimize the volume of the front-end lens assembly 5 to reduce the discomfort of the patient during use.

[0079] Furthermore, when observed along the axial direction of the imaging hole 5111, the first hole 5121 is at least partially arranged to be farther away from the fourth channel 535 than the imaging hole 5111. With such a design, the imaging hole 5111 can be closer to the middle of the front end cover 51, rather than closer to the edge of the front end cover 51, so that the imaging hole 5111 can be processed into a circular hole with a larger diameter, and the optical imaging component 52 can be arranged at a position closer to the middle of the front end cover 51 to obtain more light to meet the imaging requirements of the optical imaging component 52.

[0080] Further, when observed along the axial direction of the imaging hole 5111, the first hole 5121 has a first width along the first direction and a second width along the second direction, the first width is greater than the second width, and the first width is greater than the diameter of the imaging hole 5111. With such a design, the first hole 5121 forms a flat hole structure with a wide diameter at one end and a narrow diameter at the other end, so that the first hole 5121 with the largest possible hole cross-sectional area can be formed on the front end cover 51 with a limited total area, thereby obtaining the best possible reflux effect on the front end cover 51 with a limited volume.

[0081] Furthermore, the connecting tube body 53 has a tilt angle, which is defined as the angle between the first center line or the second center line and a line connecting the first virtual intersection of the first end opening 531 and the first center line and the second virtual intersection of the second end opening 532 and the second center line, and the tilt angle is greater than or equal to 10° and less than or equal to 24°. In this embodiment, the tilt angle is 18°. Of course, in other embodiments, the tilt angle may also be 12°, 14°, 16°, 20°, 22° or other angles, which are not listed one by one again. With such a design, the optical imaging component 52 can obtain a larger imaging viewing angle.

[0082] In a further embodiment, the optical imaging assembly 52 includes a lens body 521 and at least one light source 522, at least one of the light sources 522 is connected to the outer surface of the lens body 521, and when observed along the axial direction of the imaging hole 5111, the lens body 521 is at least partially exposed to the imaging hole 5111.

[0083] The front end cover 51 has a front end inner surface and at least one circumferential inner surface other than the front end inner surface, and at least one of the front end inner surface and at least one of the circumferential inner surface is spaced apart from the at least one light source 522. The light source 522 is spaced apart from the front end inner surface and at least one of the at least one axial inner surface of the front end cover 51, which can provide a certain heat dissipation space and more effectively reduce the heat generation of the light source 522 when working for a long time.

[0084] Specifically, the lens body 521 can adopt the OV9734 module, and the light source 522 can adopt an LED light source 522, and there are two of them. The two LED light sources 522 are symmetrically arranged on both sides of the lens body 521. At the same time, in order to facilitate the lighting of the LED light source 522, the front end cover 51 in this embodiment is made of a translucent or transparent material, and the front end surface of the front end cover 51 is polished. The connecting tube body 53 is also made of a translucent or transparent material, such as PC2858 medical polymer material. Of course, in other embodiments, the connecting tube body 53 can also be made of an opaque material, such as medical stainless steel.

[0085] In this embodiment, since the lens body 521 is arranged in the first cavity 511, and the interior of the connecting tube body 53 is separated by a connecting tube partition 533 to form a third channel 534 and a fourth channel 535, and the third channel 534 is connected to the return water gap 33 of the return water pipe 31. In this way, the routing of the lens body 521 is arranged along the first cavity 511, the third channel 534, the return water gap 33, the return water base 321, and the distance between the return water base 321 and the water inlet base 221. Through the design of the above-mentioned lens body 521 using the return water mechanism 3 for routing, the structure of the hysteroscopic endoscope is made more compact.

[0086] Please refer to Figure 12 and Fig.13 In this embodiment, the front lens assembly 5 is connected to the return pipe 31 and the water injection pipe 21 through a lens mounting structure, and the specific structure of the lens mounting structure will be described in detail below.

[0087] The lens mounting structure includes an insert 54 and a tube member 57. The insert 54 is disposed at the second end opening 532 of the front end lens assembly 5, and a clamping space is formed on the insert 54. When the front end lens assembly 5 is connected to at least one of the return pipe 31 and the injection pipe 21, the insert 54 is inserted into the return gap 33 and is configured not to block the return gap 33, and at this time, the injection pipe 21 is at least partially located in the clamping space.

[0088] With such a design, when the front end lens assembly 5 is connected and fixed to the water injection pipe 21 and the water return pipe 31, the water injection pipe 21 is clamped in the clamping space of the insert 54, and the insert 54 is located in the water return gap 33 and does not block the water return gap 33. The structure is simple and reliable and stable.

[0089] For further information, see Figure 1 A convex portion 55 is provided at one end of the water injection pipe 21 connected to the insert 54, and a concave portion 56 is provided at one end of the front end lens assembly 5 having an insert 54. When the insert 54 is inserted into the return water gap 33, the convex portion 55 on the water injection pipe 21 is inserted into the concave portion 56 of the front end lens assembly 5 to form a connection fit, and the connection fit is configured to limit the rotation of the front end lens assembly 5 relative to the water injection pipe 21 when the front end lens assembly 5 is connected to the water injection pipe 21.

[0090] In this embodiment, the convex portion 55 is configured as a curved surface body with an arc-shaped structure extending from the water injection pipe 21 toward one end of the insert 54 in a direction close to the insert 54, and the concave portion 56 is configured as a recessed area arranged on the inner side surface of the front end lens assembly 5 along the radial direction and adapted to the shape of the convex portion 55, and when the insert 54 is inserted into the return water gap 33, the convex portion 55 can be inserted into the concave portion 56 and form a connection with the concave portion 56, thereby limiting the relative rotation between the front end lens assembly 5 and the water injection pipe 21, that is, the front end lens assembly 5 rotates with the rotation of the water injection pipe 21, so that when the user screws the rotating member 42, the front end lens assembly 5 can be stably driven to rotate synchronously with the rotating member 42.

[0091] Specifically in this embodiment, the recess 56 is arranged on the inner circumferential surface of the connecting tube body 53, and the setting of the recess 56 forms a matching step at the connection between the insert 54 and the connecting tube body 53, and the matching step is configured to abut against the tube wall of the water injection pipe 21 when the front end lens assembly 5 is connected to the water injection pipe 21.

[0092] Such a design enables the water injection pipe 21 to be connected with the fourth channel 535 and not connected with the third channel 534, while the water return gap 33 is only connected with the third channel 534, thereby isolating the water return gap 33 and the water injection pipe 21, so that water injection and water return will not interfere with each other.

[0093] Please continue reading Fig.12 and Fig.13 The lens mounting structure further includes a tube member 57, which is sleeved on the outer wall of the insert 54. When the insert 54 is inserted into the water return gap 33, the tube member 57 is located in the water return gap 33. The provision of the tube member 57 can further improve the sealing performance between the front lens assembly 5 and the water injection pipe 21 and the water return pipe 31.

[0094] Specifically, the insert 54 includes a first insert block 541 and a second insert block 542. The first insert block 541 is connected to one end of the front lens assembly 5, and the second insert block 542 is connected to one end of the front lens assembly 5. The first insert block 541 and the second insert block 542 are opposite to each other and are spaced apart from each other, and the clamping space is formed between the first insert block 541 and the second insert block 542.

[0095] The first surface 5411 of the first plug block 541 facing the second plug block 542 and the second surface 5421 of the second plug block 542 facing the first plug block 541 are both curved surfaces, and when the insert 54 is inserted into the return water gap 33, the first surface 5411 and the second surface 5421 are both fitted with the outer wall of the water injection pipe 21, and a clamping space is formed between the first surface 5411 and the second surface 5421 to clamp and fix the water injection pipe 21 between the first surface 5411 and the second surface 5421.

[0096] The inner surface of the tube member 57 is glued to the outer surface of the first plug block 541, the inner surface of the tube member 57 is glued to the outer surface of the second plug block 542, and the outer surface of the tube member 57 is glued to the inner surface of the return pipe 31, that is, the inner surface of the tube member 57 is glued to the first plug block 541 and the second plug block 542, and the outer surface is glued to the inner surface of the return pipe 31, which can further ensure the direct connection stability between the front end lens assembly 5 and the water injection pipe 21 and the return pipe 31, and at the same time can further enhance the sealing performance of the return gap 33 and the front end lens assembly 5.

[0097] The first plug block 541 and the second plug block 542 are both connected to the second end opening 532 of the connecting pipe body 53, and a water-passing gap 58 is formed between the first plug block 541 and the second plug block 542. The water-passing gap 58 is located at one side of the clamping space, and the water-passing gap 58 is configured to allow liquid to flow from the third channel 534 to the water-return gap 33 via the water-passing gap 58. The water-passing gap 58 can minimize the resistance of the first plug block 541 and the second plug block 542 to the water-return gap 33.

[0098] In addition, the hysteroendoscopy also includes a control mechanism, which includes a camera control switch, a light source 522 control switch, and a control circuit board. The control circuit board, the camera control switch, and the light source 522 control switch are all arranged on the grip portion 12 of the housing 1, and the camera control switch and the light source 522 control switch are both electrically connected to the control circuit board through cables, and the control circuit board is electrically connected to the lens body 521 and the light source 522 through cables.

[0099] Specifically, the camera control switch can be configured to control the lens body 521 to perform a photo taking function when the camera is single-clicked or short-pressed for a time less than a first preset time. The camera control switch is also configured to control the lens body 521 to perform a camera function when the camera is long-pressed for a time greater than or equal to the first preset time. The light source 522 control switch is configured to adjust the brightness of the light source 522, which can specifically be adjusted by a gear position. The method of adjusting the brightness of the light source 522 by a gear position is a prior art and will not be elaborated in detail in the present invention.

[0100] The circuit board and the lens body 521 and the light source 522 can be electrically connected by using an FPC flexible flat cable, which has a good waterproof effect.

[0101] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A hysteroscopic endoscope, characterized in that: include: A housing (1) having a mounting cavity (11) therein; A water injection mechanism (2) comprising a water injection pipe (21) and a water injection assembly (22) at least partially disposed in the installation cavity (11) and connected to the water injection pipe (21); A water return mechanism (3), comprising a water return pipe (31) and a water return assembly (32) at least partially disposed in the installation cavity (11) and in communication with the water return pipe (31); the water return pipe (31) is sleeved on the water injection pipe (21) and a water return gap (33) is provided between the outer wall of the water injection pipe (21) and the inner wall of the water return pipe (31); the water return gap (33) is configured as a channel for the discharge of liquid in the uterine cavity; An instrument channel assembly (4) connected to the water injection assembly (22) in the installation cavity (11) of the housing (1), the instrument channel assembly (4) having an instrument entrance channel (411) for instruments to enter, the instrument entrance channel (411) being in communication with the water injection pipe (21) to form an instrument channel for instruments to pass through; A front-end lens assembly (5) is connected to the water inlet end of at least one of the water return pipe (31) and the water injection pipe (21), and the front-end lens assembly (5) is configured to allow liquid in the water injection pipe (21) to enter the uterine cavity through the front-end lens assembly (5) and to allow liquid in the uterine cavity to enter the water return gap (33) through the front-end lens assembly (5).

2. The hysteroendoscope according to claim 1, characterized in that: The front end lens assembly (5) comprises: The front end cover (51) has a first cavity (511) and a second cavity (512), wherein the first cavity (511) is connected to the outside through an imaging hole (5111), and the second cavity (512) is connected to the outside through a first hole (5121); an optical imaging component (52), disposed in the first cavity (511), the optical imaging component (52) being configured to form an image through the imaging hole (5111); A connecting pipe body (53) has a first end opening (531) and a second end opening (532) facing in a different direction from the first end opening (531), the connecting pipe body (53) being configured to connect the front end cover (51) and the return pipe (31), the first end opening (531) having a first center line, the second end opening (532) having a second center line, the first end opening (531) being connected to the front end cover (51), and when observed along the axial direction of the imaging hole (5111), the first center line is offset from the second center line.

3. The front end lens assembly (5) of the hysteroendoscope according to claim 2, characterized in that: The connecting tube body (53) further includes a connecting tube partition (533), which extends from the first end opening (531) to the second end opening (532) to form a third channel (534) and a fourth channel (535) which are independent of each other, one end of the third channel (534) being configured to be in communication with at least the second cavity (512), the other end of the third channel (534) being configured to be in communication with the return water gap (33) of the return water pipe (31), one end of the fourth channel (535) being configured to be in communication with the intrauterine environment, and the other end of the fourth channel (535) being configured to be in communication with the water injection pipe (21).

4. The hysteroendoscope according to claim 3, characterized in that: When viewed along the axial direction of the imaging hole (5111), neither the first cavity (511) nor the second cavity (512) overlaps with the second channel.

5. The hysteroendoscope according to claim 1, characterized in that: The instrument channel assembly (4) comprises: A first plug-in unit (41) is at least partially disposed in the installation cavity (11) of the housing (1), the first plug-in unit (41) having an instrument inlet channel (411) and a first pipe passage (412) configured to connect the instrument inlet channel (411) with the water injection pipe (21), the first pipe passage (412) also configured to connect the water injection assembly (22) with the water injection pipe (21).

6. The hysteroendoscope according to claim 5, characterized in that: The instrument channel assembly (4) further comprises: A rotating member (42), one end of which is connected to an end of the first plug-in unit (41) away from the water injection pipe (21), and the other end of which at least partially extends to the outside of the shell (1); the rotating member (42) has an instrument guide channel (421) connected to the instrument inlet channel (411); the rotating member (42) is configured such that when the rotating member (42) is driven to rotate, the first plug-in unit (41) and the water injection pipe (21) rotate synchronously with the rotating member (42).

7. The hysteroendoscope according to claim 5, characterized in that: The first plug-in (41) also includes a first one-way valve (414), which is arranged in the instrument inlet channel (411), and the first one-way valve (414) is configured to prevent fluid from flowing from the first tube channel (412) to the instrument inlet channel (411) when the instrument passes through the first one-way valve (414).

8. The hysteroendoscope according to claim 6, characterized in that: The shell (1) is located in the installation cavity (11) and is provided with at least two first limit blocks on its inner wall, the at least two first limit blocks are arranged at an angle to form a limit interval, the first plug-in (41) is provided with at least one second limit block, the at least one second limit block is arranged in the limit interval, and the at least one second limit block is configured to contact the at least two first limit blocks when the rotating member (42) rotates, so as to limit the rotation angle of the first plug-in (41).

9. The front end lens assembly (5) of the hysteroendoscope according to claim 5, characterized in that: The water injection assembly (22) comprises: A water inlet base (221), having a water inlet cavity (2211) therein, wherein the water inlet cavity (2211) is configured to accommodate at least a portion of the first plug-in unit (41), and the water inlet cavity (2211) has a first water inlet end (2212); A water inlet pipe (222), one end of which is connected to the first water inlet end (2212) of the water inlet base (221) and is in communication with the water inlet cavity (2211); The portion of the first plug-in unit (41) located in the water inlet chamber (2211) is provided with at least one water inlet connecting hole (416), and the water inlet connecting hole (416) is configured to connect the first tube passage (412) with the water inlet chamber (2211).

10. The hysteroendoscope according to claim 1, characterized in that: The water return assembly (32) comprises: A water return base (321) is arranged on one side of the water inlet base (221), the water return base (321) has a water return chamber (3211) inside, the water return chamber (3211) has a second water inlet end (3212) and a second water outlet end (3213), and the second water inlet end (3212) is connected to the water return pipe (31); A water outlet pipe (34), one end of which is connected to the second water outlet end (3213) of the water return base (321); A water return plug-in (322) is at least partially disposed in the water return chamber (3211) of the water return base (321), and the water return plug-in (322) has a second pipe passage (3221) configured to connect the water return gap (33) and the water return chamber (3211), and the water injection pipe (21) is configured to pass through the water return base (321) via the second pipe passage (3221).

Images