Electronic endoscope

Abstract

The invention provides an electronic endoscope which comprises a disposable endoscope sheath and a reusable endoscope body, the endoscope body comprises a camera shooting assembly, an endoscope body handle part and an endoscope plug, the camera shooting assembly is electrically connected with the endoscope plug, the camera shooting assembly is connected to the far end of the endoscope body handle part, and the endoscope body handle part is electrically connected with the endoscope plug. The endoscope plug is connected to the near end of the endoscope body handle part; the endoscope sheath comprises an insertion catheter and a catheter handle part, the catheter handle part is connected to the near end of the insertion catheter, an endoscope body access port is formed in the catheter handle part, the camera component extends into the insertion catheter through the endoscope body access port, and the endoscope handle part is detachably connected with the catheter handle part. According to the invention, the camera shooting assembly and the data line for transmitting the camera shooting data are repeatedly used, so that the data line which is repeatedly used is a high-quality cable, the stability of data transmission is ensured, the anti-interference performance of the product is improved, and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an electronic endoscope. Background Art

[0002] With the gradual popularization of minimally invasive surgery globally, the endoscope industry has also entered a stage of rapid development. The continuous update of minimally invasive surgery has also driven the continuous enrichment of endoscope types, including electronic endoscopes.

[0003] The repeatedly used endoscope comes into contact with patients, medical staff, etc., so it needs to be sterilized and disinfected. The sterilization problem of electronic endoscopes is also a hot topic in the field of endoscopes, including the following points:

[0004] The first point is sterilization effectiveness. Since electronic endoscopes contain electronic components inside and are sensitive to high temperatures, currently the industry generally uses hydrogen peroxide low-temperature plasma sterilization method for sterilization. However, compared with traditional high-temperature and high-humidity sterilization, its working principle is more complex and relies on the simultaneous action of oxidants, ultraviolet rays, and high-energy particles to achieve the expected sterilization effect. If problems such as equipment aging, oxidant failure, and insufficient generation of plasma state occur in the hospital, its sterilization effectiveness is usually difficult to guarantee, and incomplete sterilization is the most important reason for cross-infection of patients.

[0005] The second point is sterilization tolerance. Since the hydrogen peroxide used in hydrogen peroxide low-temperature plasma sterilization is a strong oxidant and will produce ultraviolet rays, it will quickly cause material aging. If general engineering plastics or rubbers are used, they will age and fail after 50 - 100 sterilization cycles, resulting in equipment failure and a very short service life; if special plastics such as PEEK (polyetheretherketone) and PPSU (polyphenylsulfone) and fluororubbers are used to prepare key components, although the service life will be extended, their production costs will increase significantly.

[0006] The third point is sterilization cost, including time cost and consumable cost. For the low-temperature plasma sterilization used for electronic endoscopes, thorough cleaning and drying are required before sterilization. Usually, one reprocessing cycle takes 1.5 - 2 hours. The consumables are mainly hydrogen peroxide sterilants, and the consumable cost for a single low-temperature plasma sterilization is approximately 30 - 100 yuan, which varies depending on the type, mode, and inner chamber space of the sterilizer.

[0007] The above three sterilization problems have increased the threshold for hospitals to use reusable electronic endoscopes.

[0008] To solve the sterilization problem, disposable electronic endoscopes have emerged. However, disposable electronic endoscopes are fully disposable endoscopes, that is, they need to be completely discarded after one use. Therefore, the cost is too high, especially the prices of the camera module and the data cable for high-performance data transmission are expensive. Secondly, since the data of the camera module needs to be transmitted over a long distance, there is usually a decoding or signal conversion circuit module in the middle to ensure the stability of signal transmission. It is expensive to directly discard all of them, and it will cause pollution to the environment by a large number of electronic components.

[0009] In order to reduce the cost of disposable electronic endoscopes, some companies have proposed a solution to reuse the camera module, while the remaining components including the data transmission data cable, signal conversion module, etc. are disposable. Due to the cost pressure of single-use, the quality of the data cable adopted is not very good, which leads to obvious defects in aspects such as the stable transmission of data and the anti-interference performance of the product; secondly, it is costly to directly discard the cable about 3 meters long from the endoscope body to the endoscope host and the signal conversion circuit module. Especially as the clarity of CMOS cameras is getting higher and higher and the data transmission volume is large, obviously, disposable data cables cannot meet the requirements of data transmission stability. Summary of the Invention

[0010] To solve the above technical problems, an electronic endoscope of the present invention includes a disposable endoscope sheath and a reusable endoscope body. The endoscope body includes a camera assembly, a body handle portion, and an endoscope plug. The camera assembly is electrically connected to the endoscope plug. The camera assembly is connected to the distal end of the body handle portion, and the endoscope plug is connected to the proximal end of the body handle portion; the endoscope sheath includes an insertion catheter and a catheter handle portion. The catheter handle portion is connected to the proximal end of the insertion catheter. A body access port is provided on the catheter handle portion. The camera assembly extends into the insertion catheter through the body access port, and the body handle portion is detachably connected to the catheter handle portion.

[0011] Optionally, the endoscope sheath further includes at least one lighting module and a first electrical connection portion. The lighting module is disposed at the distal end of the insertion catheter. The lighting module is electrically connected to the first electrical connection portion through a first connection line. The first electrical connection portion is disposed on the catheter handle portion;

[0012] The body handle portion is provided with a line connection portion. The line connection portion includes a line conductive portion and a second electrical connection portion. The line conductive portion is respectively connected to the camera assembly, the endoscope plug, and the second electrical connection portion. After the endoscope body is inserted into the endoscope sheath, the first electrical connection portion is conducted with the second electrical connection portion.

[0013] Optionally, an illumination channel, an instrument channel, and a lens body channel are provided in the insertion catheter. The distal ends of the illumination channel and the lens body channel are sealed by a light-transmitting sheet. The illumination module is located at the distal end of the illumination channel. The lens body access port communicates with the lens body channel, and the imaging assembly extends into the lens body channel through the lens body access port. Instrument channel interfaces are respectively provided on the catheter handle portion, and the instrument channel interfaces communicate with the instrument channel.

[0014] Optionally, the illumination module is an LED component or an optical fiber component. If the illumination module is an optical fiber component, an optical fiber interface for connecting a light source machine is further provided on the catheter handle portion, and the optical fiber interface communicates with the illumination channel.

[0015] Optionally, a first mechanical connection portion is provided on the catheter handle portion, and a second mechanical connection portion corresponding to the first mechanical connection portion is provided on the lens body handle portion. The first mechanical connection portion and the second mechanical connection portion are detachably connected.

[0016] Optionally, the first mechanical connection portion and the second mechanical connection portion are snap-connected.

[0017] Optionally, the imaging assembly includes a camera, and the camera is electrically connected to the endoscope plug through a data cable. The data cable includes at least two segments, and adjacent segments are connected through a signal conversion circuit module.

[0018] Optionally, the insertion catheter further has a bending section, and the bending section is connected to a bending driving mechanism. The bending section can be bent by the driving of the bending driving mechanism;

[0019] A first bending control interface is provided on the catheter handle portion, and the bending driving mechanism is installed on the first bending control interface;

[0020] Alternatively, a second bending control interface is provided on the lens body handle portion. After the endoscope lens body is inserted into the endoscope sheath, the second bending control interface communicates with the first bending control interface, and the bending driving mechanism is installed on the second bending control interface.

[0021] Optionally, a liquid return channel is provided in the insertion catheter, a negative pressure interface is provided on the catheter handle portion, and the drain port of the liquid return channel communicates with the negative pressure interface.

[0022] Optionally, the liquid return port of the liquid return channel is opened on the distal end face of the insertion catheter or on the side wall of the insertion catheter away from the distal end face of the insertion catheter.

[0023] Optionally, the insertion catheter sequentially includes a head end, a bending section, a docking section, and a main body section from far to near, and the liquid return port is opened on the distal side wall of the main body section or on the side wall of the docking section.

[0024] Optionally, the liquid return channel includes a main liquid return channel and at least one side liquid return channel. The main liquid return channel is arranged axially in the main body section within the main body section, and the proximal end of the main liquid return channel penetrates the proximal end face of the main body section; the side liquid return channel is arranged on the side of the main body section, and one end of the side liquid return channel communicates with the distal end of the main liquid return channel, and the other end of the side liquid return channel is the liquid return port, and the liquid return port is opened on the distal side wall of the main body section.

[0025] Optionally, the liquid return channel includes a main liquid return channel and at least one side liquid return channel. The main liquid return channel sequentially includes a first main liquid return channel and a second main liquid return channel from far to near. The first main liquid return channel is arranged axially in the docking section within the docking section; the second main liquid return channel is arranged axially in the main body section within the main body section and penetrates the distal end face and the proximal end face of the main body section; the side liquid return channel is arranged on the side of the docking section, the proximal end of the first main liquid return channel communicates with the distal end of the second main liquid return channel, the distal end of the first main liquid return channel communicates with one end of the side liquid return channel, and the other end of the side liquid return channel is the liquid return port, and the liquid return port is opened on the side wall of the docking section.

[0026] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0027] In the present invention, the camera assembly, the data line for transmitting camera data including the endoscope plug are reused. Therefore, the reused data line selects high-quality cables, which ensures the stability of data transmission and improves the anti-interference performance of the product, etc. Even in the face of a high-definition camera with a large data transmission volume, it can meet the requirements of data transmission stability.

[0028] Furthermore, since the camera module data needs to be transmitted over a long distance, the data line connecting the camera and the endoscope plug can be divided into at least two segments, and adjacent two segments are connected by a signal conversion circuit module to ensure the stability of signal transmission. Moreover, the data line and the signal conversion circuit module are both reused, further reducing the cost of the endoscope.

[0029] Even further, compared with the existing electronic endoscope, the endoscope provided by the present invention discards relatively few components. Therefore, it has great economic value and environmental protection advantages. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of an electronic endoscope provided by an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of an endoscope body provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic structural diagram of an endoscope sheath provided by an embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of an endoscope body provided by another embodiment of the present invention;

[0035] Figure 5 is a schematic structural diagram of an electronic endoscope provided by another embodiment of the present invention;

[0036] Figure 6 is a schematic structural diagram of an insertion catheter provided by an embodiment of the present invention;

[0037] Figure 7 is a schematic structural diagram of an endoscope sheath provided by another embodiment of the present invention. Detailed implementation manners

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the description and claims of the present invention and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The terms "on" and "above" and any variations thereof are intended to describe a positional relationship and do not represent a direct contact relationship between the described objects.

[0040] As described in the background art, the existing disposable electronic endoscope is a fully disposable endoscope, that is, it needs to be completely discarded after one use. Therefore, the cost is too high, especially the price of the camera module and the data cable for high-performance data transmission is expensive. Secondly, since the data of the camera module needs to be transmitted over a long distance, there is usually a decoding or signal conversion circuit module in the middle to ensure the stability of signal transmission. Directly discarding all of them is expensive and will cause a large amount of electronic components to pollute the environment.

[0041] In order to reduce the cost of disposable electronic endoscopes, some companies generally propose a solution to reuse the camera module, while the remaining components including the data cable for data transmission and the signal conversion circuit module are disposable. Due to the cost pressure of single use, the quality of the data cable adopted is not very good, which leads to obvious defects in aspects such as stable data transmission and anti-interference performance of the product. Secondly, the cost of directly discarding the cable about 3 meters long from the endoscope body to the endoscope host and the signal conversion circuit module is relatively high. Especially as the clarity of CMOS cameras is getting higher and higher and the data transmission volume is large, obviously, the disposable data cable cannot meet the requirements of data transmission stability.

[0042] To solve the above technical problems, the present invention provides an electronic endoscope. Please refer to Figures 1 to 7, including a disposable endoscope sheath 2 and a reusable endoscope body 1. The endoscope body 1 includes an imaging component 11, a body handle portion 12, and an endoscope plug 13. The imaging component 11 is electrically connected to the endoscope plug 13. The imaging component 11 is connected to the distal end of the body handle portion 12, and the endoscope plug 13 is connected to the proximal end of the body handle portion 12. The endoscope sheath 2 includes an insertion catheter 21 and a catheter handle portion 22. The catheter handle portion 22 is connected to the proximal end of the insertion catheter 21. A body access port is provided on the catheter handle portion 22. The imaging component 11 extends into the insertion catheter 21 through the body access port. The body handle portion 12 is detachably connected to the catheter handle portion 22.

[0043] In the present invention, the imaging component 11 and the data cable for transmitting imaging data, including the endoscope plug 13, are reused. Therefore, the reused data cable is preferably a high-quality cable, which ensures the stability of data transmission and improves the anti-interference performance of the product, etc. Even when facing a high-definition camera with a relatively large data transmission volume, it can meet the requirements of data transmission stability.

[0044] Furthermore, compared with existing electronic endoscopes, the endoscope of the present invention discards relatively fewer components. Therefore, it has great economic value and environmental protection advantages, etc.

[0045] Since an illumination module is also provided in the electronic endoscope, the illumination module can be reused, that is, the illumination module belongs to a part of the endoscope body 1, or the illumination module can be disposable, that is, the illumination module belongs to a part of the endoscope sheath 2. The present invention does not make specific limitations on this.

[0046] If the illumination module is disposable, then the illumination module belongs to the composition of the endoscope sheath 2. Then the illumination module 23 is located outside the imaging component 11, which helps to ensure the clarity of imaging. Based on this, the present invention preferably uses a disposable illumination module 23.

[0047] Specifically, the endoscope sheath 2 further includes at least one illumination module 23 and a first electrical connection portion 25. The illumination module 23 is disposed at the distal end of the insertion catheter 21. The illumination module 23 is electrically connected to the first electrical connection portion 25 through a first connection line 24. The first electrical connection portion 25 is disposed on the catheter handle portion 22.

[0048] The body handle portion 12 is provided with a line connection portion. The line connection portion includes a line conductive portion and a second electrical connection portion 121. The line conductive portion is respectively connected to the imaging component 11, the endoscope plug 13, and the second electrical connection portion 121. After the endoscope body 1 is inserted into the endoscope sheath 2, the first electrical connection portion 25 is conducted with the second electrical connection portion 121.

[0049] The specific structures of the disposable endoscope sheath 2 and the reusable endoscope body 1 will be described in detail below respectively.

[0050] A lighting channel 212, an instrument channel 213 and an endoscope body channel 211 are provided in the insertion catheter 21. The distal end faces of the lighting channel 212 and the endoscope body channel 211 are sealed by a light-transmitting sheet. The lighting module 23 is located at the distal end of the lighting channel 212. The endoscope body access port communicates with the endoscope body channel 211, and the imaging assembly 11 extends into the endoscope body channel 211 through the endoscope body access port.

[0051] The function of the light-transmitting sheet is to separate the lighting module 23 and the imaging assembly 11 from human tissues, and it will not affect the lighting effect and the imaging effect.

[0052] Instrument channel interfaces 221 are respectively provided on the catheter handle part 22, and the instrument channel interfaces 221 communicate with the instrument channel 213.

[0053] The present invention does not limit the specific type of the lighting module 23. Any device that can provide lighting is within the protection scope of the present invention. For example, the lighting module 23 is an LED component or an optical fiber component. If the lighting module 23 is a disposable optical fiber component, an optical fiber interface 224 for connecting a light source machine is further provided on the catheter handle part 22, and the optical fiber interface 224 communicates with the lighting channel 212.

[0054] In order to ensure the stability of the overall structure after the endoscope body 1 is inserted into the endoscope sheath 2, after the endoscope body 1 is inserted into the endoscope sheath 2, the endoscope body 1 is fixedly connected to the endoscope sheath 2. At the same time, it is also necessary to meet the requirement that the endoscope body 1 can be detachably separated from the endoscope sheath 2. Therefore, in an embodiment of the present invention, a first mechanical connection part 222 is provided on the catheter handle part 22, and a second mechanical connection part corresponding to the first mechanical connection part 222 is provided on the endoscope body handle part 12. The first mechanical connection part 222 is detachably connected to the second mechanical connection part. That is, when the endoscope body 1 is inserted into the endoscope sheath 2, the first mechanical connection part 222 is fixedly connected to the second mechanical connection part; when the endoscope body 1 is separated from the endoscope sheath 2, the first mechanical connection part 222 is separated from the second mechanical connection part.

[0055] This embodiment does not specifically limit the detachable connection method between the first mechanical connection part 222 and the second mechanical connection part. For example, it can adopt threaded connection, snap connection, etc. For the convenience of operation, it is preferably that the first mechanical connection part 222 is snap-connected to the second mechanical connection part.

[0056] The imaging assembly 11 includes a camera 111, and the camera 111 is electrically connected to the endoscope plug 13 through a data cable. The data cable includes at least two segments, and adjacent segments are connected through a signal conversion circuit module.

[0057] The imaging assembly 11 further includes a conducting rod 112. One end of the conducting rod 112 is connected to the camera 111, and the other end is connected to the handle portion 12 of the lens body. One end of the data cable is electrically connected to the camera 111, and the other end passes through the conducting rod 112 and is directly or indirectly connected to the endoscope plug 13.

[0058] In this embodiment, the conducting rod 112 plays a role in supporting the data cable, aiming to facilitate the feeding of the camera 111 from the lens body access port of the catheter handle portion 22 to the distal end of the lens body channel 211.

[0059] If the insertion catheter 21 is a flexible tube or a combination of a flexible and a rigid tube, then the conducting rod 112 is also flexible, such as being made of nitinol alloy.

[0060] Since the data of the imaging module needs to be transmitted over a long distance, the data cable connecting the camera 111 and the endoscope plug 13 can be divided into at least two segments, and adjacent segments are connected through a signal conversion circuit module to ensure the stability of signal transmission. Moreover, both the data cable and the signal conversion circuit module are reusable, further reducing the cost of the endoscope.

[0061] As an embodiment, the data cable includes a first data cable segment and a second data cable segment 14. One end of the first data cable segment is connected to the camera 111, and the other end passes through the conducting rod 112 and is connected to the signal conversion circuit module. One end of the second data cable segment 14 is connected to the signal conversion circuit module, and the other end is electrically connected to the endoscope plug 13.

[0062] The signal conversion circuit module can be provided on the handle portion of the lens body or not provided on the handle portion of the lens body. The present invention does not make specific limitations on this.

[0063] As an embodiment, the signal conversion circuit module is provided on the handle portion of the lens body and integrated on the circuit conducting portion.

[0064] When the endoscope lens body 1 is inserted into the endoscope sheath 2, the camera 111 is located at the distal end of the lens body channel 211 inside the insertion catheter 21.

[0065] The insertion catheter 21 can be a flexible tube, a rigid tube, or a combination of a flexible and a rigid tube. The present invention does not make limitations on this. When the insertion catheter 21 is a flexible tube or a combination of a flexible and a rigid tube, the insertion catheter 21 further has a bending section 217, and the bending section 217 is connected to a bending driving mechanism, and the bending section 217 can be bent by the driving of the bending driving mechanism.

[0066] As for whether the bending drive mechanism is provided on the catheter handle portion 22 or on the endoscope body handle portion 12, the present invention does not make any restrictions in this regard.

[0067] As an embodiment, the bending drive mechanism is provided on the catheter handle portion 22.

[0068] Specifically, a first bending control interface is provided on the catheter handle portion 22, and the bending drive mechanism is installed on the first bending control interface.

[0069] As another embodiment, the bending drive mechanism is provided on the endoscope body handle portion 12.

[0070] Specifically, a first bending control interface is provided on the catheter handle portion 22, and a second bending control interface is provided on the endoscope body handle portion 12. After the endoscope body 1 is inserted into the endoscope sheath 2, the second bending control interface communicates with the first bending control interface, and the bending drive mechanism is installed on the second bending control interface.

[0071] This embodiment does not make any restrictions on the specific structure of the bending section 217. For example, the bending section 217 is a snake bone tube, and a plurality of linear transmission members, such as steel wires or other linear transmission members, are provided inside the snake bone tube. The bending control of the snake bone tube by the bending drive is mainly achieved by pulling the linear transmission members. This embodiment does not make any restrictions on the number of linear transmission members pulled. For example, on the premise of four linear transmission members, pulling the four linear transmission members respectively can make the bending section 217 bend in four directions (up, down, left, and right). If two linear transmission members are used, pulling the two linear transmission members respectively can make the bending section 217 bend in two directions.

[0072] The distal end of the linear transmission member is fixedly connected to the distal end of the snake bone tube, and the proximal end of the linear transmission member is connected to the bending drive mechanism.

[0073] The present invention does not make any restrictions on the field of use of the electronic endoscope. For example, it can be used as a ureteroscope, a pyeloscope, a cystoscope, a gastroscope, a colonoscope, a bronchoscope, a choledochoscope, a hysteroscope, etc.

[0074] For example, during ureteroendoscopic lithotripsy, the laser lithotripsy process will produce a large number of fine particles, and the field of vision in the renal pelvis may be unclear due to factors such as tissue bleeding. Furthermore, a liquid inlet channel 215 is also provided in the insertion catheter 21, and a liquid inlet interface 223 is provided on the catheter handle 22. The doctor connects the liquid injection device to the liquid inlet interface 223 on the catheter handle 22, and injects liquids such as physiological saline into the renal pelvis through the liquid inlet channel 215 through the liquid injection device to ensure the cleaning of the field of vision, remove the broken stones, and take away the heat generated by the high frequency. Continuous irrigation with a large amount of liquid can easily cause a significant increase in the pressure in the renal pelvis, causing a series of surgical complications, especially fever, severe kidney pain, ureteral postoperative stenosis and other diseases. Therefore, how to reduce the pressure in the renal pelvis has become a technical problem that needs to be solved urgently in this field.

[0075] In order to solve the above technical problems, in one embodiment of the present invention, a liquid return channel 214 is provided in the insertion catheter 21 , a negative pressure interface 225 is provided on the catheter handle 22 , and the discharge port of the liquid return channel 214 is connected to the negative pressure interface 225 .

[0076] The doctor adds a negative pressure device to the negative pressure interface 225, and uses the negative pressure device to suck the liquid in the renal pelvis out of the liquid return channel 214 in real time to reduce the pressure in the renal pelvis.

[0077] This embodiment does not limit the position setting of the liquid return port 2141 of the liquid return channel 214, such as opening the liquid return port 2141 of the liquid return channel 214 on the distal end surface of the insertion catheter 21 or on the side wall of the insertion catheter 21 away from the distal end surface of the insertion catheter 21.

[0078] Since the insertion catheter 21 has closely arranged lighting devices, mirror channels 211 and instrument channels 213, if a liquid return channel 214 is added to the head end of the insertion catheter 21, a large number of particles of different sizes after lithotripsy will be attracted by negative pressure, causing blockage of the liquid return channel 214 and difficulty in liquid return.

[0079] In order to solve this technical problem, the present invention preferentially opens the liquid return port 2141 of the liquid return channel 214 on the side wall away from the distal end face of the insertion catheter 21. Therefore, the liquid return port 2141 avoids the gravel area, thereby preventing the gravel from entering the liquid return channel 214 from the liquid return port 2141 under the action of negative pressure suction, preventing the liquid return channel 214 from being blocked, and achieving smooth liquid return.

[0080] Further, the insertion catheter 21 sequentially includes a distal end 216, a bending section 217, a docking section 218, and a main body section 219 from far to near. The proximal end of the main body section 219 is connected to the catheter handle portion 22. Since the bending section 217 such as a flexible snake bone tube is behind the distal end 216 of the endoscope, the structure of the bending section 217 is complex, and it is difficult to increase the liquid return channel 214 without increasing the outer diameter. In order not to increase the outer diameter of the insertion catheter 21, in an embodiment of the present invention, the liquid return channel 214 is not provided in the bending section 217 and the distal end 216, but the liquid return channel 214 is provided behind the bending section 217, and the liquid return port 2141 is opened on the distal side wall of the main body section 219 or the side wall of the docking section 218. Since adding the liquid return channel 214 to the main body section 219 and the docking section 218 does not increase their outer diameters, therefore, in this embodiment, the liquid return channel 214 is increased without changing the outer diameter of the insertion catheter 21.

[0081] Since both the docking section 218 and the main body section 219 are located behind the bending section 217, therefore, the liquid return channel 214 can be only provided in the main body section 219, and the liquid return port 2141 is opened on the side wall of the main body section 219; the liquid return channel 214 can also be provided in both the main body section 219 and the docking section 218, and the liquid return port 2141 is opened on the side wall of the docking section 218. The following will respectively elaborate on these two implementation manners in detail.

[0082] As an embodiment, the liquid return channel 214 includes a main liquid return channel and at least one side liquid return channel. The main liquid return channel is arranged axially in the main body section 219 along the main body section 219, and the proximal end of the main liquid return channel penetrates through the proximal end face of the main body section 219. The distal end of the main liquid return channel can penetrate through the distal end face of the main body section 219, or can not penetrate through the distal end face of the main body section 219, but the distal end of the main liquid return channel does not extend into the docking section 218. The side liquid return channel is arranged on the side of the main body section 219, and one end of the side liquid return channel is communicated with the distal end of the main liquid return channel, and the other end of the side liquid return channel is the liquid return port 2141, and the liquid return port 2141 is opened on the distal side wall of the main body section 219.

[0083] In this embodiment, the side liquid return channels and the liquid return ports 2141 are in one-to-one correspondence. The number of the side liquid return channels in this embodiment is not limited, that is, the side liquid return channels can be one or multiple, and multiple side liquid return channels are distributed at intervals along the circumferential direction of the main body section 219. Correspondingly, the number of the liquid return ports 2141 is not limited either. The liquid return ports 2141 can be one or multiple, and multiple liquid return ports 2141 are distributed at intervals along the circumferential direction of the side wall of the main body section 219.

[0084] As another embodiment, the liquid return channel 214 includes a main liquid return channel and at least one side liquid return channel. The main liquid return channel sequentially includes a first main liquid return channel and a second main liquid return channel from far to near. The first main liquid return channel is disposed in the docking section 218 along the axial direction of the docking section 218. The proximal end of the first main liquid return channel penetrates through the proximal end face of the docking section 218. The distal end of the first main liquid return channel may penetrate through the distal end face of the docking section 218 or may not penetrate through the distal end face of the docking section 218, but the distal end of the first main liquid return channel cannot extend into the bending section 217. The second main liquid return channel is disposed in the main body section 219 along the axial direction of the main body section 219 and penetrates through the distal end face and the proximal end face of the main body section 219. The side liquid return channel is disposed on the side surface of the docking section 218. The proximal end of the first main liquid return channel communicates with the distal end of the second main liquid return channel. The distal end of the first main liquid return channel communicates with one end of the side liquid return channel. The other end of the side liquid return channel is the liquid return port 2141, and the liquid return port 2141 is opened on the side wall of the docking section 218.

[0085] In this embodiment, the side liquid return channels and the liquid return ports 2141 are in one-to-one correspondence. The number of side liquid return channels in this embodiment is not limited, that is, the side liquid return channels can be one or multiple, and multiple side liquid return channels are distributed at intervals along the circumferential direction of the docking section 218. Correspondingly, the number of liquid return ports 2141 is not limited either. The liquid return ports 2141 can be one or multiple, and multiple liquid return ports 2141 are distributed at intervals along the circumferential direction of the side wall of the docking section 218.

[0086] In order not to increase the outer diameter of the insertion catheter 21, the instrument channel 213 and the liquid inlet channel 215 can share a channel.

[0087] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic endoscope, characterized in that: The invention comprises a disposable endoscope sheath and a reusable endoscope body, wherein the endoscope body comprises a camera assembly, a body handle portion and an endoscope plug, wherein the camera assembly is electrically connected to the endoscope plug, the camera assembly is connected to the distal end of the body handle portion, and the endoscope plug is connected to the proximal end of the body handle portion; the endoscope sheath comprises an insertion catheter and a catheter handle portion, wherein the catheter handle portion is connected to the proximal end of the insertion catheter, the catheter handle portion is provided with a body access port, the camera assembly extends into the insertion catheter through the body access port, and the body handle portion is detachably connected to the catheter handle portion.

2. The electronic endoscope according to claim 1, characterized in that: The endoscope sheath further comprises at least one lighting module and a first electrical connection portion, wherein the lighting module is disposed at the distal end of the insertion catheter, the lighting module is electrically connected to the first electrical connection portion via a first connection line, and the first electrical connection portion is disposed at the catheter handle portion; The handle of the scope body is provided with a circuit connection part, and the circuit connection part includes a circuit conductive part and a second electrical connection part. The circuit conductive part is respectively connected to the camera assembly, the endoscope plug and the second electrical connection part. After the endoscope body is connected to the endoscope sheath, the first electrical connection part is connected to the second electrical connection part.

3. The electronic endoscope according to claim 2, characterized in that: The insertion catheter is provided with an illumination channel, an instrument channel and a mirror body channel, the distal surfaces of the illumination channel and the mirror body channel are both sealed by a light-transmitting sheet, the illumination module is located at the distal end of the illumination channel, the mirror body access port is communicated with the mirror body channel, and the camera assembly extends into the mirror body channel through the mirror body access port; instrument channel interfaces are respectively provided on the catheter handle portion, and the instrument channel interfaces are communicated with the instrument channel.

4. The electronic endoscope according to claim 3, characterized in that: The lighting module is an LED component or an optical fiber component. If the lighting module is an optical fiber component, the catheter handle is also provided with an optical fiber interface for connecting to a light source, and the optical fiber interface is connected to the lighting channel.

5. The electronic endoscope according to claim 1, characterized in that: The catheter handle is provided with a first mechanical connection part, and the scope handle is provided with a second mechanical connection part corresponding to the first mechanical connection part, and the first mechanical connection part and the second mechanical connection part are detachably connected.

6. The electronic endoscope according to claim 5, characterized in that: The first mechanical connection portion is engaged with the second mechanical connection portion.

7. The electronic endoscope according to claim 1, characterized in that: The camera assembly includes a camera, which is electrically connected to the endoscope plug via a data line. The data line includes at least two sections, and two adjacent sections are connected via a signal conversion circuit module.

8. The electronic endoscope according to claim 1, characterized in that: The insertion catheter further comprises a bending section, the bending section is connected to a bending drive mechanism, and the bending section can be bent by the driving of the bending drive mechanism; The catheter handle is provided with a first bending control interface, and the bending drive mechanism is installed on the first bending control interface; Alternatively, a second bending control interface is provided on the handle portion of the endoscope body, and after the endoscope body is connected to the endoscope sheath, the second bending control interface is connected to the first bending control interface, and the bending drive mechanism is installed on the second bending control interface.

9. The electronic endoscope according to claim 1, characterized in that: A liquid return channel is provided in the insertion catheter, a negative pressure interface is provided on the catheter handle, and a liquid discharge port of the liquid return channel is communicated with the negative pressure interface.

10. The electronic endoscope according to claim 9, characterized in that: The liquid return port of the liquid return channel is disposed on the distal end surface of the insertion catheter or on a side wall of the insertion catheter away from the distal end surface of the insertion catheter.

11. The electronic endoscope according to claim 10, characterized in that: The insertion catheter comprises a head end, a curved section, a docking section and a main body section in sequence from far to near, and the liquid return port is arranged on the distal side wall of the main body section or on the side wall of the docking section.

12. The electronic endoscope according to claim 11, characterized in that: The liquid return channel includes a main liquid return channel and at least one side liquid return channel, wherein the main liquid return channel is arranged in the main body segment along the axial direction of the main body segment, and the proximal end of the main liquid return channel passes through the proximal end surface of the main body segment; the side liquid return channel is arranged on the side of the main body segment, and one end of the side liquid return channel is connected to the distal end of the main liquid return channel, and the other end of the side liquid return channel is the liquid return port, which is opened on the distal side wall of the main body segment.

13. The electronic endoscope according to claim 11, characterized in that: The liquid return channel includes a main liquid return channel and at least one side liquid return channel, and the main liquid return channel includes a first main liquid return channel and a second main liquid return channel in sequence from far to near, the first main liquid return channel is arranged in the docking section along the axial direction of the docking section; the second main liquid return channel is arranged in the main body section along the axial direction of the main body section, and passes through the distal end surface and the proximal end surface of the main body section; the side liquid return channel is arranged on the side of the docking section, the proximal end of the first main liquid return channel is connected with the distal end of the second main liquid return channel, the distal end of the first main liquid return channel is connected with one end of the side liquid return channel, and the other end of the side liquid return channel is the liquid return port, and the liquid return port is opened on the side wall of the docking section.

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