Electronic endoscope

Abstract

The present invention discloses an electronic endoscope, comprising an insertion portion and an operation portion connected to each other in sequence, wherein the insertion portion comprises a front end portion and a bending portion, wherein the distal end face of the front end portion has an inclined surface, wherein the inclined surface intersects with the distal end face of the front end portion to form a ridge line, and the ridge line is parallel to the bending direction of the bending portion. The electronic endoscope provided by the present invention can achieve good passability at low cost according to the use environment.

Description

Technical Field

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

[0002] Endoscopic retrograde cholangiopancreatography (ERCP, English full name: Encoscopic Retrograde Cholangio-Pancreatography) refers to the technique of inserting a duodenoscope into the descending part of the duodenum, finding the duodenal papilla, inserting a contrast catheter from the biopsy duct to the papilla opening, injecting contrast agent and then taking an X-ray film to display the pancreatic and bile ducts. On the basis of ERCP, interventional treatments such as duodenal sphincterotomy, endoscopic nasobiliary drainage, endoscopic bile drainage, and endoscopic lithotomy can be performed. Because they do not require surgery and are less traumatic, they are very popular with patients. The above-mentioned interventional treatments often require the interventional treatment instrument to pass through the instrument channel (or working channel, forceps channel, etc.) of the above-mentioned duodenoscope, and enter the bile and pancreatic duct through the duodenal papilla for interventional treatment. When the interventional treatment instrument is an endoscope, the above-mentioned duodenoscope can be understood as a mother endoscope or mother endoscope.

[0003] However, the endoscopes currently sold on the market as interventional treatment instruments are complex in structure, expensive, and can only be reused. Therefore, there is a need for an endoscope that can basically achieve the functions of the above-mentioned endoscope as an interventional treatment instrument and is also low-cost. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the cost of endoscopes used as interventional treatment instruments is too high. The present invention provides an electronic endoscope that can be used as an interventional treatment instrument and has a lower cost.

[0005] To solve the above technical problems, an embodiment of the present invention discloses an electronic endoscope, comprising an insertion portion and an operating portion connected to each other in sequence, the insertion portion comprising a front end portion and a bending portion, the distal end face of the front end portion having an inclined surface, the inclined surface intersecting with the distal end face of the front end portion to form a ridge line, and the ridge line is parallel to the bending direction of the bending portion.

[0006] By adopting the above technical solution, the electronic endoscope provided by the present invention has good passability in the vertical direction perpendicular to the bending direction through the setting of the inclined surface; by actively controlling the bending direction, the electronic endoscope provided by the present invention has good passability in the bending direction; and by moving or rotating the operating part, the electronic endoscope provided by the present invention can choose to use the inclined surface, or use the active control of the bending direction, or use the active control of the inclined surface and the bending direction at the same time to achieve passability in different scenarios according to actual conditions. Most importantly, the above technical solution has a simple structure and can be manufactured at low cost.

[0007] The above different scenarios at least include passing through the working channel of the mother endoscope (or called the instrument channel or the forceps channel, etc.) or entering the duodenal papilla. That is, when the electronic endoscope provided by the present invention passes through the mother endoscope pre-set in the human body, it has good passability; when the electronic endoscope provided by the present invention passes through the mother endoscope and enters the duodenal papilla, it has good passability. Moreover, through cooperation with the operating unit, the above passability advantages are achieved in a low-cost manner.

[0008] Optionally, the inclined surface faces a side surface of the operating portion.

[0009] Optionally, an instrument port is provided on the shell of the operating part, and the inclined surface faces one side of the instrument port.

[0010] Optionally, the curved portion comprises a harness channel axially penetrating the curved portion, and an intersection of an axis of the harness channel and a distal end surface of the curved portion is located at an eccentric position relative to the axis of the curved portion.

[0011] Optionally, a line connecting the axis of the harness channel and the intersection of the distal end surface of the curved portion is parallel to the ridge line.

[0012] Optionally, the front end portion includes a base, and a camera unit and two lighting units are provided at the distal end of the base, and the two lighting units are respectively located on both sides of the camera unit.

[0013] Optionally, the curved portion includes an auxiliary channel, and the auxiliary channel is water-tight.

[0014] Optionally, the intersection of the auxiliary channel and the distal end surface of the front end portion is located in a region outside the inclined surface.

[0015] Optionally, there are two auxiliary channels, and intersections of the two auxiliary channels with the distal end surface of the front end portion are respectively close to the two lighting units.

[0016] Optionally, the insertion portion further comprises a flexible tube portion, the front end portion, the curved portion and the flexible tube portion are all provided with a working channel extending axially therethrough, and the working channels of the front end portion, the curved portion and the flexible tube portion are connected via a pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view showing the structure of an electronic endoscope provided in one embodiment of the present invention.

[0018] Figure 2 A bottom view showing the structure of an insertion portion provided by an embodiment of the present invention.

[0019] Figure 3 A left side view showing the structure of an insertion portion provided by an embodiment of the present invention.

[0020] Figure 4 Shown along Figure 2 Sectional view of AA.

[0021] Figure 5 A bottom view showing a bending state of the bending portion in the left-right direction thereof.

[0022] Figure 6a Shown along Figure 3 A cross-sectional view of the junction between the front end of the BB and the curved portion.

[0023] Figure 6b Shown along Figure 3 Cross-sectional view of the junction of the curved portion of the BB and the flexible tube portion.

[0024] Figure 6c Shown along Figure 3 A cross-sectional view of the junction between the front end of the CC and the curved portion.

[0025] Figure 6d Shown along Figure 3 Cross-sectional view of the junction of the curved portion and the flexible tube portion of the CC.

[0026] Figure 7a A three-dimensional diagram showing the internal structure of an operating unit provided by an embodiment of the present invention.

[0027] Figure 7b A front view showing the internal structure of an operating unit provided by an embodiment of the present invention.

[0028] Figure 8a A three-dimensional diagram showing a partial internal structure of an operating unit provided by an embodiment of the present invention.

[0029] Figure 8b A front view showing a partial internal structure of an operating unit provided by an embodiment of the present invention.

[0030] Fig. 9 A three-dimensional diagram showing the back structure of an operating portion provided by an embodiment of the present invention.

[0031] Fig.10A three-dimensional diagram showing the structure of a locking mechanism provided by an embodiment of the present invention.

[0032] Fig.11 A three-dimensional diagram showing the structure of a petal-shaped block provided by an embodiment of the present invention.

[0033] Fig.12 A three-dimensional diagram showing the structure of a control unit provided by an embodiment of the present invention.

[0034] Fig.13 A three-dimensional diagram showing the structure of a follower provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following is an explanation of the embodiments of the present invention by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0036] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of this embodiment, it should be noted that the terms "near" and "far" are relative positional relationships. When an operator operates an instrument to process a target object, the side along the instrument close to the operator is "near" and the side close to the target object is "far".

[0039] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0040] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0041] In the embodiments provided by the present invention, in order to realize some functions of the endoscope as an interventional treatment instrument, the curved portion and / or flexible tube portion in the embodiments provided by the present invention involves multiple channels or cavities. At this time, the description as "channel" or "cavity" is mainly relative to the curved portion and / or flexible tube portion that is roughly in a solid state. If the state presented by the curved portion and / or flexible tube portion is not solid, such as a roughly hollow state, at this time, the channel or cavity involved in the curved portion and / or flexible tube portion in the embodiments provided by the present invention can be a pipeline or a path. That is, as long as the required path can be provided for the corresponding components, the channel or cavity in the curved portion and / or flexible tube portion in the embodiments provided by the present invention can also be a pipeline or a path.

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Endoscopic retrograde cholangiopancreatography (ERCP, English full name: Encoscopic Retrograde Cholangio-Pancreatography) refers to the technique of inserting a duodenoscope into the descending part of the duodenum, finding the duodenal papilla, inserting a contrast catheter from the biopsy duct to the papilla opening, injecting contrast agent and then taking an X-ray film to display the pancreatic and bile ducts. On the basis of ERCP, interventional treatments such as duodenal sphincterotomy, endoscopic nasobiliary drainage, endoscopic bile drainage, and endoscopic lithotomy can be performed. Because they do not require surgery and are less traumatic, they are very popular with patients. The above-mentioned interventional treatments often require the interventional treatment instrument to pass through the instrument channel (or working channel, forceps channel, etc.) of the above-mentioned duodenoscope, and enter the bile and pancreatic duct through the duodenal papilla for interventional treatment. When the interventional treatment instrument is an endoscope, the above-mentioned duodenoscope can be understood as a mother endoscope or mother endoscope.

[0044] However, the endoscopes currently sold on the market as interventional treatment instruments are complex in structure and expensive. While achieving ERCP surgery and corresponding interventional treatments, they also bring another problem.

[0045] On August 6, 2019, the New York Times published an article titled "Why Are These Medical Instruments So Tough to Sterilize" by Roni Caryn Rabin. The title was translated by 36kr (36kr.com) as "Why is it so difficult to disinfect endoscopes that are touched by 500,000 patients every year?" The article states: In medical institutions around the world, the diagnosis and treatment of diseases such as the pancreas and bile duct require the use of tools such as snake duodenoscopes. However, these fiber optic components have a significant disadvantage: although they can be inserted into the upper part of the small intestine through the mouth and reused, they cannot be sterilized by conventional means. Usually, they are washed by hand and then put into a machine like a dishwasher for cleaning again. During the re-cleaning process, special chemicals are added to kill microorganisms. Even if each process is strictly cleaned according to the requirements, bacteria may still remain on these devices and patients may be infected. Hundreds of cases of duodenoscope infections have been reported in medical institutions across the U.S. and Europe, but a recent test shows that regulators have grossly underestimated the risks. Worse, the devices can also spread drug-resistant infections for which there are few cures.

[0046] Obviously, endoscopes, as interventional treatment instruments, also have the above-mentioned problems.

[0047] Therefore, people are in urgent need of an endoscope that can achieve the above-mentioned functions of diagnosing and treating diseases such as the pancreas and bile duct, while avoiding infection caused by inability to clean thoroughly. In addition, it is important to have a low cost, otherwise it will still be difficult for patients to use. Obviously, when the cost is low enough, the low-cost endoscope can be used as a disposable endoscope, which will completely solve the problem of secondary infection caused by the inability to clean the endoscope thoroughly.

[0048] The present invention provides an electronic endoscope which can be used as an interventional treatment instrument in the above-mentioned ERCP surgery and can achieve the above-mentioned purpose, and the corresponding components contained in the electronic endoscope which can be manufactured and used independently.

[0049] For the convenience of describing the orientation, in the electronic endoscope 1 provided by the embodiment of the present invention, the knob 3111 on the operating portion 3 is located on the front of the operating portion 3. The operating portion 3 is provided with an instrument port 307, and the instrument port 307 is located on the side of the operating portion 3. The inclined surface 211 faces the side of the operating portion 3. The inclined surface 211 faces the side of the instrument port 307.

[0050] Figure 1FIG. 2 is a front view showing the structure of an electronic endoscope provided by an embodiment of the present invention. Figure 1 As shown, an electronic endoscope 1 provided in one embodiment of the present invention comprises an elongated insertion portion 2 and an operating portion 3 disposed at a proximal end of the insertion portion 2. That is, the present invention provides an electronic endoscope 1 comprising an insertion portion 2 and an operating portion 3 connected to each other.

[0051] Figure 2 A bottom view of the structure of the insertion portion provided by one embodiment of the present invention is shown. Figure 2 As shown, the insertion portion 2 is continuously provided with a front end portion 21, a curved portion 22 and a flexible tube portion 23 in sequence starting from the distal end.

[0052] Figure 3 The left side view of the structure of the insertion part provided by one embodiment of the present invention is shown. Figure 3 Combined with Figure 1 , Figure 2 As shown, the front end portion 21 of the insertion portion 2 is provided with a substantially cylindrical base 210. The base 210 is provided with an inclined surface 211 formed by cutting off a portion of the lower side of the distal end surface of the base 210. Those skilled in the art can understand that the above-mentioned "cutting off" is to facilitate the image understanding of the shape of the inclined surface 211, and is not a limitation on the formation process of the inclined surface 211.

[0053] Continue as Figure 3 The base 210 is also provided with a plurality of cavities that penetrate the base 210 axially, including a cavity for fixing the camera unit 212, a cavity for fixing the lighting unit 213, and a working channel 214 for allowing working tools to pass through. Figure 3 As shown, when observing the base 210 from the distal end, most of the working channel 214 is located in the inclined surface 211.

[0054] By adopting the above technical solution, through the setting of the inclined surface, the electronic endoscope provided by the present invention has good passability in the vertical direction perpendicular to the bending direction; through the active control of the bending direction, the electronic endoscope provided by the present invention has good passability in the bending direction; and through the movement or rotation of the operating part, the electronic endoscope provided by the present invention can choose to use the inclined surface, or use the active control of the bending direction, or use the active control of the inclined surface and the bending direction at the same time to achieve passability in different scenarios according to actual conditions. Most importantly, the above technical solution has a simple structure and can be manufactured at low cost. The above low-cost advantage is reflected in the various structures of the electronic endoscope provided by the present invention.

[0055] The base 210 may also include an auxiliary channel 215, which allows clean water to pass through. Those skilled in the art will understand that this embodiment uses water as an example mainly to intuitively illustrate that the auxiliary channel 215 can be provided with corresponding features according to different objects passing through, that is, when the auxiliary channel 215 is used as a water channel, it should be basically sealed and able to withstand a certain pressure, and can ensure that water is properly transported to the far end of the base 210 and normally plays a role in flushing, rather than limiting the auxiliary channel 215 to only allow water to pass through. In this embodiment, two auxiliary channels 215 are provided.

[0056] In the insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, the intersection of the auxiliary channel 215 and the distal end surface of the front end portion 21 is located in a region outside the inclined surface 211 .

[0057] The applicant has found that, compared with a single lighting unit, lighting units arranged in pairs and symmetrically can make the image captured by the camera unit clearer and with fewer blind spots. Therefore, in this embodiment, lighting units 213 located on both sides of the camera unit 212 are still arranged on the base 210, which may be very small in size in the actual product. The applicant believes that even if the size of other cavities is forced to become smaller, it is worth at least arranging the above two lighting units 213.

[0058] In the insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, two fixed lighting units 213 are located on both sides of the camera unit 212. The intersections of the two auxiliary channels 215 and the distal end surface of the front end portion 21 are close to the two lighting units 213 respectively.

[0059] The base 210 should be hard. The definition of hard here can be understood as when the electronic endoscope 1 provided in this embodiment is operated in the human body, the base 210 should be able to withstand the corresponding pressure and overcome the corresponding resistance, so that the camera unit 212, the lighting unit 213, the working channel 214, and the auxiliary channel 215 arranged thereon can be firmly maintained. The base 210 can be made of hard plastic or other materials that meet the above conditions, such as metal, ceramics with glaze on the surface, and melamine resin.

[0060] In the insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, the camera unit 212 and the working channel 214 are disposed opposite to each other at two ends of the cross section of the front end portion 21. The cross section is a section perpendicular to the axis of the front end portion 21.

[0061] Figure 4 Shown along Figure 2 Sectional view of AA. Figure 42 shows a schematic cross-sectional view of a curved portion 22 provided in an embodiment of the present invention. In this embodiment, the curved portion 22 and the flexible tube portion 23 have substantially the same cross-sectional structure, and both are provided with cavities penetrating along the axial direction, including a cable channel 223 and a working channel 224. According to the foregoing description, an auxiliary channel 225 may also be provided. As mentioned above, the auxiliary channel 225 may be provided to be watertight.

[0062] The internal structure of the curved portion 22 and the flexible tube portion 23 is set to correspond to the internal structure of the base 210. Specifically, the camera unit 212 and the lighting unit 213 set on the base 210 need the cable channel 223 in the curved portion 22 and the flexible tube portion 23 to provide cables 24 such as wires and data cables. Among them, the cable 24 in this application indicates that it can achieve conductivity to achieve power supply or transmit electronic data. The working channel 214 set on the base 210 requires the curved portion 22 and the flexible tube portion 23 to also be provided with a corresponding working channel 224, so that the instruments and other objects that need to pass through the working channels 214 and 224 can pass through the flexible tube portion 23, the curved portion 22, and the base 210 from the proximal end in sequence to enter the human body or the object to be detected. When the auxiliary channel 215 is set on the base 210, the curved portion 22 and the flexible tube portion 23 can also be provided with a corresponding auxiliary channel 225 and cooperate with the auxiliary channel 215.

[0063] In the insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, the cable channel 223 and the working channel 224 are arranged oppositely at two ends of the cross section of the bending portion 22. The cross section is a section perpendicular to the axis of the front end portion 21.

[0064] Continue as Figure 4As shown, unlike the internal structure of the base 210, a harness channel 226 is also provided inside the curved portion 22 and the flexible tube portion 23. The purpose of providing this channel is mainly to achieve bending control of the curved portion 22. The harness 20 can be placed in the harness channel 226. The harness 20 starts from the operating mechanism 31 located at the operating portion 3, passes through the operating portion 3, the flexible tube portion 23, the curved portion 22 in sequence, and is finally fixed at the eccentric position at the far end of the curved portion 22. In this way, when the operator controls the operating mechanism 31 and tightens the harness 20, the harness 20 will act on the eccentric position at the far end of the curved portion 22, so that the curved portion 22 bends toward the eccentric position. In other words, the bending direction of the curved portion 22 is determined by the setting position of the harness channel 226 on the far end face of the curved portion 22. By setting the fixing point of the harness 20 at the far end of the curved portion 22 at different eccentric positions, the bending direction of the curved portion 22 can be controlled. In order to realize the bidirectional bending of the curved portion 22, in this embodiment, the applicant sets two wire harnesses 20, and connects the proximal ends of the two wire harnesses 20 to the operating mechanism 31, and the distal ends extend along the above-mentioned path and are respectively fixed at different eccentric positions at the distal end of the curved portion 22, thereby realizing the bidirectional bending of the curved portion 22. In order to realize the bending angle of the curved portion 22 in one direction as large as possible, the fixed positions of the above-mentioned two wire harnesses 20 at the distal end of the curved portion 22 can be arranged opposite to each other. That is, the curved portion 22 includes two wire harness channels 226, and the intersection of the two wire harness channels 226 and the distal end surface of the curved portion 22 is mirror-imaged at the left and right ends of the distal end surface of the curved portion 22 ( Figure 4 In some embodiments, the two harness channels 226 may also be arranged at the center of the distal end surface of the curved portion 22 in the vertical direction, which is conducive to achieving the maximum bending angle of the curved portion 22. In other words, the intersection of the two harness channels 226 and the distal end surface of the curved portion 22 is symmetrically arranged relative to the longitudinal section of the axis passing through the working channel 224.

[0065] Figure 5 A bottom view showing a bending state of the bending portion in the left-right direction thereof.

[0066] The insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, wherein the curved portion 22 includes a cable channel 223, a working channel 224 and a harness channel 226 penetrating the curved portion 22, wherein the intersection of the axis of the harness channel 226 and the distal end face of the curved portion 22 is located at an eccentric position relative to the axis of the curved portion 22. That is, the axis of the harness channel 226 does not coincide with the axis of the curved portion 22. When the auxiliary channel 225 is provided, the intersection of the two harness channels 226 and the distal end face of the curved portion 22 is close to the intersection of the two auxiliary channels 225 and the distal end face of the curved portion 22.

[0067] In the present invention, the line connecting the intersection of the two harness channels 226 and the distal end surface of the curved portion 22 is substantially parallel to the ridgeline 216 , thus ensuring that the ridgeline 216 is substantially parallel to the bending direction of the curved portion 22 .

[0068] When the operator controls the harness 20 to bend the bending portion 22 to one side, the flexible tube portion 23 may also bend at a certain angle. In this embodiment, in order to make the operator's control more precise, the material of the flexible tube portion 23 is set to be harder than the bending portion 22, so that when the operator controls the bending portion 22 to drive the front end 21 to bend through the harness 20, the flexible tube portion 23 basically does not bend, so that the position of the front end 21 can be easily controlled. In other embodiments, according to different purposes, the material of the flexible tube portion 23 can also be set to be the same as the material of the bending portion 22, so that when necessary, the flexible tube portion 23 can be controlled to move with the movement of the bending portion 22. In the above embodiment, although only the bending of the bending portion 22 and the flexible tube portion 23 is controlled by material selection, those skilled in the art can understand that the bending angle of the bending portion 22 and the follow-up action of the flexible tube portion 23 can also be controlled by controlling different specifications of the same material, or setting different parts to different materials or different specifications of the same material. In order to make the flexible tube 23 relatively less prone to bending and the curved portion 22 relatively easier to bend, on the one hand, the material attached to the inside and outside of the two (such as the outer cover, the outer coating material, the inner cover attached to the inner wall, the inner coating material) can be considered, and on the other hand, the material of the pipeline replacing the channel or cavity can also be considered. At this time, since the pipeline is used to replace the channel or cavity, it is obviously arranged inside the curved portion 22 and / or the flexible tube 23. In addition, in addition to the material, it can also be achieved through the structure of the above-mentioned components, such as a spring tube.

[0069] In the insertion portion 2 of the electronic endoscope 1 provided by the above-mentioned embodiment of the present invention, the material of the curved portion 22 or the material attached to the curved portion 22 has a lower rigidity than the material of the flexible tube portion 23 or the material attached to the flexible tube portion 23, that is, it is softer and easier to bend. Alternatively, the material or structure of the pipeline arranged in the curved portion 22 has a lower rigidity than the material or structure of the pipeline in the flexible tube portion 23, that is, it is softer and easier to bend. For example, the pipeline can be supported by a spring tube, and a spring tube with a sparser arrangement or a spring tube with a smaller wire diameter is easier to bend.

[0070] In the case where two harnesses 20 are provided as described above and two harness channels 226 are provided in the bend 22 and the flexible tube 23, one end of a whole harness 20 can be inserted into one harness channel 226 from the proximal side of the flexible tube 23, passed through the flexible tube 23 and the bend 22 in sequence and extended from the distal side of the bend 22 (at this time, the bend 22 has not yet been connected to the front end 21), and then inserted into another harness channel 226 from the distal side of the bend 22 and extended from the proximal side of the flexible tube 23. That is, a harness 20 is passed through the harness channels 226 of the bend 22 and the flexible tube 23 to form a U shape, wherein the opening of the U shape is located outside the proximal end of the flexible tube 23, and the closing of the U shape is located outside the distal end of the bend 22. Then, the portion of the harness 20 located outside the distal end of the bend 22 is fixed to the distal end face of the bend 22, such as by gluing or welding, so that the harness 20 can be quickly installed. This installation method can significantly improve work efficiency.

[0071] The above embodiment of the present invention provides a method for installing a wire harness 20 for bending control of an electronic endoscope 1 on an insertion portion 2, wherein the insertion portion 2 includes a bending portion 22 and a flexible tube portion 23, and the bending portion 22 and the flexible tube portion 23 are both provided with two wire harness channels 226 extending in the axial direction, and the installation method includes:

[0072] Insert one end of a wire harness 20 into a wire harness passage 226 from the proximal end side of the flexible tube portion 23;

[0073] Extend the above-mentioned one end of the wire harness 20 from the distal end of the curved portion 22;

[0074] Insert the above-mentioned one end of the wire harness 20 into another wire harness channel 226 from the distal end of the curved portion 22;

[0075] Extend the above-mentioned one end of the wire harness 20 from the proximal end of the flexible tube portion 23;

[0076] The portion of the wire harness 20 protruding from the distal end of the curved portion 22 is fixedly connected to the curved portion 22 .

[0077] As an example of the use scenario of the embodiment provided by the present invention, in ERCP endoscopic retrograde cholangiopancreatography, the mother endoscope is inserted through the mouth and inserted into the duodenum, and then the electronic endoscope provided by this embodiment is inserted into the duodenal papilla (the common opening of the bile duct and the main pancreatic duct in the duodenum) through the eyepiece endoscope to perform various required operations. The applicant found that the electronic endoscope provided by this embodiment needs to pass through the corresponding channel (such as the working channel, or the instrument channel, or the forceps channel, etc.) in the mother endoscope and be inserted into the duodenal papilla, which has very high requirements for passability. Among them, since the front end 21 in this embodiment is located at the front end of the electronic endoscope 1, its passability is the most important. The applicant has found in practice that the factors affecting the passability of the front end 21 mainly include the distal shape of the front end 21 and the support of the curved portion 22 to the front end 21.

[0078] The distal shape of the front end portion 21 is a factor affecting the passability of the front end portion 21. As mentioned above, in this embodiment, the front end portion 21 includes a base 210, and the base 210 is provided with an inclined surface 211. Figure 3 As shown, the intersection of the inclined surface 211 and the distal end surface of the base 210 forms a ridge 216. The applicant has found that, under the premise of requiring convenient operation and not wanting to increase the cost of the electronic endoscope 1, the ridge 216 can be set to be perpendicular to the axis of the base 210 and parallel to the bending direction of the bending portion 22. When the electronic endoscope 1 provided in this embodiment passes through the corresponding channel of the mother endoscope, the applicant has found that the material selection of the bending portion 22 and / or the flexible tube portion 23 can achieve better passability of the front end portion 21. At the same time, the applicant has found that in order to increase the passability, the structural setting of the operating portion 3 (detailed structure is shown below) can also be made so that when the bending portion 22 and / or the flexible tube portion 23 is adaptively bent with the structure of the corresponding channel of the mother endoscope, it will not be subject to inappropriate constraints of the harness 20. When the front end portion 21 and the bending portion 22 of the electronic endoscope 1 provided in this embodiment extend out of the mother endoscope, the bending of the bending portion 22 in the left and right direction (parallel to the ridgeline 216) can be achieved by controlling the aforementioned harness 20; the bending in the up and down direction (perpendicular to the ridgeline 216) can be easily achieved by first rotating the electronic endoscope 1 outside the body by a certain angle (the bending portion 22 rotates accordingly) and then controlling the bending with the aforementioned harness 20. In this way, both passability can be ensured and cost can be reduced.

[0079] The insertion portion 2 of the electronic endoscope 1 provided in the above embodiment of the present invention includes a front end portion 21 and a bending portion 22. The distal end face of the front end portion 21 has an inclined surface 211. The inclined surface 211 intersects with the distal end face of the front end portion 21 to form an edge line 216. The edge line 216 is parallel to the bending direction of the bending portion 22.

[0080] The strength of the support provided by the curved portion 22 to the front end portion 21 is also a factor that affects the passability of the front end portion 21. When the electronic endoscope 1 provided in this embodiment needs to enter a relatively narrow tissue of the human body, such as entering the duodenal papilla, the support provided to the front end portion 21 from its proximal end is more important. If the support is too weak, it will be difficult to overcome the resistance and enter successfully. The applicant has found that one of the optional solutions is to improve the connection between the front end portion 21 and the curved portion 22. In this embodiment, the above-mentioned support is achieved by both internal and external supports. In fact, after a large number of experiments, the applicant has found that providing internal support alone, providing external support alone, and providing internal and external supports at the same time can achieve the purpose of the above-mentioned support.

[0081] Figure 6a Shown along Figure 3 A cross-sectional view of the junction between the front end of the BB and the curved portion. Figure 6b Shown along Figure 3 Cross-sectional view of the junction of the curved portion of the BB and the flexible tube portion. Figure 6c Shown along Figure 3 A cross-sectional view of the junction between the front end of the CC and the curved portion. Figure 6d Shown along Figure 3 Cross-sectional view of the junction of the curved portion and the flexible tube portion of the CC.

[0082] The so-called internal support, such as Figure 6a As shown, a stainless steel tube 201 with a bell mouth (not shown) at the proximal end may be provided, and its distal end is placed in the working channel 214 of the base 210, and its proximal end with the bell mouth is placed in the working channel 224 of the curved portion 22, and generally forms an interference fit, so that the connection between the stainless steel tube 201 and the base 210 and the curved portion 22 is more stable. When the instrument moves along the working channel from the proximal end to the distal end, it is easier to pass through the junction of the curved portion 22 and the base 210 due to the setting of the bell mouth. Figure 6c As shown, a stainless steel tube 201a may be provided with its distal end placed in the auxiliary channel 215 of the base 210 and its proximal end placed in the distal end of the curved portion 22. This can prevent water leakage between the curved portion 22 and the base 210 while also serving as an internal support.

[0083] The so-called external support, such as Figure 6a , 6cAs shown, a stainless steel tube 202 is provided on the outside, which partially surrounds the base 210 and partially surrounds the distal end of the curved portion 22. The stainless steel tube 202 hoops the distal ends of the base 210 and the curved portion 22 together, which can prevent leakage at the joint of the base 210 and the curved portion 22, and can also achieve the purpose of the aforementioned support. In the above embodiment, when each stainless steel tube is provided, it is necessary to simultaneously consider the effect of its length on the bending angle of the curved portion 22. After repeated tests by the applicant, it is believed that the specification of the stainless steel tube 201 is 8 mm long, which is easy to take into account both passability and bending control. Among them, it can extend into the base 210 part by less than 4 mm, and it can also be selected from 2-3.5 mm. The specification of the stainless steel tube 202 can be 5-10 mm long, wherein 6 mm long is easy to take into account both passability and bending control, and the part covering the base 210 and the part covering the curved portion 22 are about half each, and it can also be selected that the part covering the base 210 is smaller than the part covering the curved portion 22.

[0084] The insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, wherein the working channel 214 of the front end portion 21 and the working channel 224 of the curved portion 22 are connected by a pipe fitting (a stainless steel pipe 201 in this embodiment). The pipe fitting (stainless steel pipe 201) connecting the working channel 214 of the front end portion 21 and the working channel 224 of the curved portion 22 has a bell mouth, which faces the curved portion 22 and is placed in the working channel 224 of the curved portion 22. The auxiliary channel 215 of the front end portion 21 and the auxiliary channel 225 of the curved portion 22 are connected by a pipe fitting (a stainless steel pipe 201a in this embodiment). The outer side of the pipe fitting connected with the auxiliary channel 215 of the front end portion 21 and the auxiliary channel 225 of the curved portion 22 are watertightly connected with the auxiliary channel 215 of the front end portion 21 and the auxiliary channel 225 of the curved portion 22. The front end portion 21 and the curved portion 22 are connected by a pipe fitting (a stainless steel pipe 202 in this embodiment) which is clamped from the outside to the joint between the front end portion 21 and the curved portion 22 .

[0085] Similarly, in order to achieve the connection between the flexible tube 23 and the curved portion 22, or in other words, to achieve the support of the curved portion 22 by the flexible tube 23, the above-mentioned method of separately providing the inner and outer supports or simultaneously providing the inner and outer supports can also be adopted. Since the cross-sectional structures of the curved portion 22 and the flexible tube 23 are basically the same, the inner support is provided, such as Figure 6b , 6d As shown, a stainless steel tube 203 may be provided with its distal end disposed in the working channel 224 at the proximal end of the curved portion 22 and its proximal end disposed in the working channel 224 at the distal end of the flexible tube portion 23. Alternatively, a stainless steel tube 205 may be provided with its distal end disposed in the auxiliary channel 225 at the proximal end of the curved portion 22 and its proximal end disposed in the auxiliary channel 225 at the distal end of the flexible tube portion 23, either alone or in addition. Figure 6b , 6dAs shown, a stainless steel tube 204 is provided on the outside, which partially surrounds the proximal end of the curved portion 22 and partially surrounds the distal end of the flexible tube portion 23. The stainless steel tube 204 can be a complete steel tube, or a spring steel tube with an opening in the axial direction, or a steel tube or an open steel tube made of a memory alloy). When the stainless steel tube 204 has an axial opening, the installation efficiency can be improved. However, due to the presence of the opening, the dimensional accuracy of the components connected by the stainless steel tube 204 is required to be high, otherwise the open end may be warped, and after being inserted into the human body or the object to be detected, it may scrape the human tissue or the object to be detected, or may affect the stability of the installation, or may squeeze the internal channel. Therefore, the choice can be made based on the balance between cost and efficiency. The stainless steel tube 204 hoops the proximal end of the curved portion 22 and the distal end of the flexible tube portion 23 together. Like the aforementioned internal support, it can prevent leakage of the joint and achieve the purpose of support. Similarly, the lengths of the stainless steel tube 203, the stainless steel tube 204, and the stainless steel tube 205 need to be considered to avoid affecting the bending angles of the curved portion 22 and the flexible tube portion 23. After repeated tests by the applicant, it is believed that the specification of the stainless steel tube 203 can be 5-10 mm long, which is easy to take into account both passability and bending control, and about half of it extends into the curved portion 22. The specification of the stainless steel tube 204 can be 5-12 mm long, which is easy to take into account both passability and bending control, and about half of it covers the curved portion 22. The specification of the stainless steel tube 205 can be 5-10 mm long, which is easy to take into account both passability and bending control, and about half of it extends into the curved portion 22.

[0086] In addition, in this embodiment, a harness channel 226 is also provided in the flexible tube portion 23 and the curved portion 22, so a stainless steel tube 206 can be provided which is partially located in the harness channel 226 at the proximal end of the curved portion 22 and partially located in the harness channel 226 at the distal end of the flexible tube portion 23, which can ensure that the control harness 20 passes through the joint smoothly enough and also play the role of the aforementioned support. Its size can be the same as that of the aforementioned stainless steel tube providing internal support.

[0087] The insertion portion 2 of the electronic endoscope 1 provided by the above embodiment of the present invention, wherein the working channel 224 of the curved portion 22 and the working channel 224 of the flexible tube portion 23 are connected by a pipe fitting (a stainless steel pipe 203 in this embodiment). The harness channel 226 of the curved portion 22 and the harness channel 226 of the flexible tube portion 23 are connected by a pipe fitting (a stainless steel pipe 206 in this embodiment). The auxiliary channel 225 of the curved portion 22 and the auxiliary channel 225 of the flexible tube portion 23 are connected by a pipe fitting (a stainless steel pipe 205 in this embodiment). The outer side of the pipe fitting (a stainless steel pipe 205 in this embodiment) connected to the auxiliary channel 225 of the curved portion 22 and the auxiliary channel 225 of the flexible tube portion 23 is watertightly connected to the auxiliary channel 225 of the curved portion 22 and the auxiliary channel 225 of the flexible tube portion 23. The curved portion 22 and the flexible tube portion 23 are connected via a pipe fitting (a stainless steel pipe 204 in this embodiment) which is clamped from the outside to the joint between the curved portion 22 and the flexible tube portion 23 .

[0088] The bending portion 22 and the flexible tube portion 23 are both made of flexible material, which can be the same material, or the material of the bending portion 22 can be softer than the material of the flexible tube portion 23. In this embodiment, the bending portion 22 is made by extrusion process.

[0089] In the embodiment provided by the present invention, the above-mentioned flexible material can be Elastomer (polyetheramide block copolymer composed of rigid polyamide and flexible polyether block). The above-mentioned stainless steel tubes can be fixedly connected to the flexible material by bonding. Among them, the stainless steel tube arranged on the outside can also be fixedly connected to the inner part of the clamped part by using a crimping process alone (using a crimping machine) or a combination of a crimping process and a bonding process. In addition, the flexible materials can also be connected to each other by hot melting. When the flexible materials are connected to each other by hot melting, under a suitable process, the flexible material itself that has been hot-melted and then cooled can provide sufficient support. At this time, it is not necessary to set a stainless steel tube for providing internal or external support between the front end 21 and the curved part 22, and between the curved part 22 and the flexible tube part 23. That is, through the hot melting process, it is possible to achieve a fixed connection between the front end 21 and the curved part 22, and between the curved part 22 and the flexible tube part 23, and it is also possible to provide the internal and external support required as mentioned above. Of course, after hot melting, a rough surface is sometimes formed on the outer surface of the flexible material. After entering the human body, this rough surface may cause various problems; sometimes the flexible materials connected together by hot melting cannot withstand repeated bending during work and may break at the joint. Therefore, those skilled in the art can understand that, in summary, the hot melting process with lower cost can be used to replace stainless steel pipes and the bonding process or crimping process between stainless steel pipes and flexible materials. However, if the support, rough surface and connection strength are comprehensively considered, the above various processes and structures can be applied or combined in different parts as needed.

[0090] It is worth noting that in the present embodiment, the inner and outer supports between the front end portion 21, the curved portion 22 and the flexible tube portion 23 are all made of stainless steel tubes. Those skilled in the art will understand that the stainless steel tube is only an optional method. As long as it can meet the strength required for the above-mentioned internal and external supports, as well as other requirements such as rust prevention and surface required for entering the human body or the object to be detected, supports made of other materials, such as polylactic acid, may also be used.

[0091] Figure 7a A three-dimensional diagram showing the internal structure of an operating unit provided by an embodiment of the present invention. Figure 7b A front view showing the internal structure of an operating unit provided by an embodiment of the present invention. Figure 8a A three-dimensional diagram showing a partial internal structure of an operating unit provided by an embodiment of the present invention. Figure 8b A front view showing a partial internal structure of an operating unit provided by an embodiment of the present invention.

[0092] To make the diagram clearer, Figure 8a , 8b Relative to Figure 7a , 7b The control unit 311 and the follower unit 312 are removed.

[0093] like Figure 7a , 7b As shown, the insertion part 2 and the operating part 3 are connected by a sheath 32, which is roughly conical and has a narrow portion 321 in the middle. The inner cavity of the sheath 32 allows the insertion part 2 to pass through, that is, the proximal end of the insertion part 2 extends into the operating part 3 and protrudes from the proximal end surface of the sheath 32.

[0094] like Figure 7b As shown, the bottom end of the sheath 32 is in an H shape, and the narrow part of the H shape is engaged with the corresponding protruding part of the shell to achieve assembly. The narrow part 321 in the middle of the sheath 32 can also be assembled by engaging with the corresponding protruding part of the shell 30.

[0095] like Figure 7a , 7b As shown in FIGS. 8a and 8b, the operating part 3 may be composed of a shell 30 having an internal cavity. In this embodiment, the shell 30 is provided with an auxiliary port 306, an instrument port 307, a button port 308, and a knob port 301. When the operator holds the operating part 3 with his left hand and finally controls the bending part 22 by controlling the corresponding components on the operating part 3 with his right hand, the opening of the sheath 32 is generally downward relative to the operator, the instrument port 307 is provided at the front side of the operating part 3, and the opening faces obliquely upward; the knob port 301 is located on the right side; the auxiliary port 306 is provided at the rear side of the operating part 3, and the opening faces obliquely upward. Among them, the knob port 301 is circular, and a circular ring is provided on it, and the circular ring coincides with the axis of the knob port 301, and extends to the inner and outer sides of the shell 30 of the operating part 3 to form flanges, respectively. The flange extending inward is defined as the inner flange 3011, and the flange extending outward is defined as the outer flange 3012. The operating part 3 can be used for holding when the operator operates the electronic endoscope provided by the present invention.

[0096] The operating unit 3 includes an operating mechanism 31. The operating mechanism 31 further includes a control unit 311, a follower unit 312, a locking component 313, and a harness restraining component 314. Fig.12 In this embodiment, the control unit 311 includes a knob 3111 and a shaft 3112. The knob 3111 is disposed outside the housing 30, and a stopper 3113 is disposed on the inner side of the knob 3111. The shaft 3112 coincides with the axis of the knob 3111, one end of the shaft 3112 is fixed to the knob 3111, and the other end is provided with teeth on the outer periphery, which is defined as a tooth end. Corresponding to the stopper 3113 disposed on the inner side of the knob 3111, as shown in FIG. Fig. 9 As shown, two other limit blocks 3113 are arranged on the outer side of the shell 30.

[0097] Combination Fig.13The follower part 312 includes a follower ring 3121, which is approximately a hollow cylinder and is arranged in the housing 30. The follower ring 3121 is provided with external teeth on the outer circumference of one end close to the knob opening 301, which is defined as an external tooth end 3122; and the inner circumference of the end away from the knob opening 301 is provided with internal teeth, which is defined as an internal tooth end 3123. The inner diameter of the external tooth end 3122 of the follower ring 3121 is larger than the inner flange 3011 formed by the knob opening 301 extending inward, so that the external tooth end 3122 of the follower ring 3121 can be sleeved on the inner flange 3011 and can rotate. The follower ring 3121 is provided with three ring pieces 3124 protruding from the circumference in the radial direction, and the ring pieces 3124 are provided with positioning holes 3125. In this embodiment, the positioning holes 3125 provided on different ring pieces 3124 overlap each other in the circumferential position, that is, the axes of the positioning holes 3125 provided on different ring pieces 3124 coincide with each other.

[0098] The locking component 313 includes a locking mechanism 3131, a petal-shaped block 3132, and a locking block 3133. Fig.10 The locking mechanism 3131 further includes a ring 3134 , a handle 3135 , and a cross block 3136 .

[0099] In this embodiment, the ring 3134, the handle 3135, and the cross block 3136 are fixedly connected to each other. As shown in the figure, the handle 3135 is arranged on one side of the ring 3134, and is roughly located in the same plane as the ring 3134. The cross block 3136 is arranged on the handle 3135 and extends toward the housing 30. Fig. 9 The housing 30 is provided with a cross slot 302 corresponding to the cross block 3136. The cross block 3136 extends into the housing 30 through the cross slot 302 and is fixedly connected to the petal-shaped block 3132 located in the housing 30. In this embodiment, a groove that can be engaged with the cross block 3136 is provided in the outward end of the petal-shaped block 3132 to achieve a quick and stable installation between the cross block 3136 and the petal-shaped block 3132. A positioning block 3137 is provided on the edge of the ring 3134. The positioning block 3137 extends from the outer edge of the inner side (toward the housing 30) end surface of the ring 3134 to the inner side (housing 30), and forms a step 3138 protruding outward relative to the axis of the ring 3134 at the extended terminal.

[0100] In the operating portion 3 of the electronic endoscope 1 provided by the above embodiment of the present invention, the cross block 3136 and the positioning block 3137 of the locking mechanism 3131 are located on the same side of the circular ring 3134 .

[0101] The locking block 3133 is disposed on the inner wall of the housing 30 and extends into the housing 30 . A pointed protrusion 3139 is disposed on one side of the locking block 3133 facing the knob opening 301 .

[0102] In addition, combined Fig. 9 The housing 30 is also provided with a slot 303, and the positioning blocks 3137 arranged at the edge of the ring 3134 can extend into the slot 303 respectively, and the ring 3134 can be assembled on the housing 30 through the engagement of the protruding step 3138 at the terminal of the positioning block 3137 with the edge of the slot 303. In this way, according to the restriction of the slot 303 on the positioning block 3137 and the restriction of the cross slot 302 on the cross block 3136, the locking mechanism 3131 can be assembled on the housing 30 and can rotate a certain angle relative to the housing 30. In order to make the rotation of the ring 3134 smoother, in this embodiment, the inner ring of the ring 3134 is sleeved on the outer flange 3012 of the knob mouth 301. Otherwise, the rotation of the ring 3134 can only rely on the cooperation of the positioning block 3137 and the slot 303, which may cause undesirable deflection and affect the use.

[0103] The relative positional relationship between the above-mentioned components is as follows: the tooth end of the rotating shaft 3112 passes through the outer flange 3012 of the knob opening 301, the inner flange 3011 of the knob opening 301, the outer tooth end 3122 of the follower ring 3121, and the inner tooth end 3123 of the follower ring 3121 in sequence, meshes with the inner tooth end 3123 of the follower ring 3121, and protrudes axially from the end surface of the inner tooth end 3123 of the follower ring 3121. At this time, due to the setting of the outer flange 3012, the limit block 3113 provided on the inner end surface of the knob 3111 can rotate with the knob 3111 and will not touch the housing 30. When the knob 3111 rotates, the limit block 3113 on the housing 30 controls the maximum rotation angle of the knob 3111 by limiting the moving range of the limit block 3113 on the inner end surface of the knob 3111.

[0104] Therefore, those skilled in the art can understand that in the unlocked state, when the operator rotates the knob 3111 , the knob 3111 drives the rotating shaft 3112 fixedly connected thereto to rotate, and the rotating shaft 3112 drives the follower ring 3121 to rotate around the inner flange 3011 .

[0105] When the operator wants to lock the lock, the operator moves the handle 3135, and the handle 3135 drives the ring 3134 to rotate. The ring 3134, the positioning block 3137, and the cross block 3136 rotate to a certain angle along the outer flange 3012, the slot 303, and the cross slot 302 respectively. Figure 8b As shown, the cross block 3136 drives the petal-shaped block 3132 in the shell 30 to move along the cross slot 302, and the protruding part of the petal-shaped block 3132 squeezes the locking block 3133, causing the locking block 3133 to undergo elastic deformation, and its pointed protrusion 3139 engages or meshes with the outer tooth end 3122 of the follower ring 3121, so that the follower ring 3121 cannot rotate, thereby achieving locking.

[0106] In other embodiments, a pin hole 3114 radially penetrating the rotating shaft 3112 is provided on the tooth end of the rotating shaft 3112, and a pin 3115 passing through the pin hole 3114 is further provided to prevent the follower ring 3121 from axially separating from the rotating shaft 3112.

[0107] In other embodiments, the locking component 313 further includes an annular groove 3130 for placing an elastic washer, and in the state where the transfer is completed, the elastic washer is placed in the annular groove 3130 and is located between the ring 3134 and the housing 30. The elastic washer 3130 can reduce the noise generated when the ring 3134 rotates relative to the housing 30; and in the locked state, the contact between the ring 3134 and the housing 30 can increase the damping by increasing the friction force, and the connection is more stable.

[0108] Those skilled in the art can understand that the components named as cross blocks and petal blocks in the present invention are named for the convenience of understanding their functions, and are not limited to their specific shapes. As long as the transmission effect desired in the present application can be achieved, they belong to the protection scope of the present application. Figure 7a , 7b , 8a, 8b, as mentioned above, this embodiment controls the bending of the curved portion 22 by tightening and relaxing the two wire harnesses 20 at the proximal end. That is, the distal end of the wire harness 20 is fixed to the distal end of the curved portion 22, and the proximal end of the wire harness 20 passes through the curved portion 22, the flexible tube portion 23, and the sheath 32 in sequence to enter the housing 30 of the operating portion 3, and passes through the wire harness restraint component 314 in sequence in the housing 30 of the operating portion 3, and then passes through at least two positioning holes 3125 on the ring pieces 3124 of the follower ring 3121, and is fixed to the last positioning hole 3125 passed through by welding or bonding. The applicant has found that for the proximal end of the wire harness 20, positioning is performed by first passing through the positioning hole 3125 on one ring piece 3124 and finally passing through and being fixed to the positioning hole 3125 on the other ring piece 3124, which can achieve the effect of rapid installation and stable positioning of the proximal end of the wire harness 20, and will not affect the action of the operating mechanism 31. In particular, after the wire harness 20 passes through at least two different positioning holes 3125, a thin rod can be passed through all the positioning holes, and for further tightening, glue can be applied to the positioning holes 3125. This can not only quickly install, but also achieve stable positioning of the proximal end of the wire harness 20, and will not affect the action of the operating mechanism 31.

[0109] In the operating portion 3 of the electronic endoscope 1 provided by the above embodiment of the present invention, the proximal end of the wire harness 20 passes through the positioning hole 3125 of the middle ring piece 3124 of the follower ring 3121 .

[0110] In the operating portion 3 of the electronic endoscope 1 provided by the above embodiment of the present invention, a thin rod is provided on the follower ring for inserting into the positioning hole 3125 through which the wire harness 20 passes and fixing the proximal end of the wire harness 20 to the positioning hole 3125 .

[0111] In this embodiment, the harness restraint component 314 includes a main wire-passing plate 3141 and two branch wire-passing plates 3142. The main wire-passing plate 3141 is arranged on the far side of the branch wire-passing plate 3142, and the branch wire-passing plate 3142 is arranged on the near side of the main wire-passing plate 3141. Two positioning holes 3125 are arranged in the middle of the main wire-passing plate 3141, respectively for two wire harnesses 20 to pass through; the edge of the main wire-passing plate 3141 is provided with a slot with an opening facing downward, which can be plugged into the plug plate 304 fixed on the inner wall of the shell 30, so as to realize the rapid fixation of the main wire-passing plate 3141 relative to the shell 30. Two sub-wire plates 3142 are respectively arranged in two harness passages 305, each sub-wire plate 3142 is provided with a positioning hole 3125, each harness passage 305 is provided with a slot 3143 on the inner wall, and the sub-wire plates 3142 are fixed to the housing 30 by being inserted into the slot 3143 on the inner wall of the harness passage 305. Those skilled in the art can understand that by first passing the harness 20 through the positioning hole 3125, and then inserting and fixing the main wire plate 3141 and the sub-wire plates 3142, a higher installation efficiency can be achieved.

[0112] The operating part 3 of the electronic endoscope 1 provided by the above embodiment of the present invention, wherein a wire harness passage 305 is provided in the housing 30. A main wire passing plate 3141 and / or a branch wire passing plate 3142 are provided in the wire harness passage 305. A positioning hole 3125 is provided on the main wire passing plate 3141 and / or the branch wire passing plate 3142. Two positioning holes 3125 are provided on the main wire passing plate 3141, which are located one above the other.

[0113] In addition, as mentioned above, in order to make the insertion part 2 easier to pass through the corresponding channel of the mother endoscope, that is, to improve the passability of the insertion part 2 relative to the corresponding channel of the mother endoscope as the use environment, the structure of the operating part 3 can also be set so that the bending part 22 and / or the flexible tube part 23 will not be inappropriately constrained by the harness 20 when they are adaptively bent along the structure of the corresponding channel of the mother endoscope. The applicant found that in order to prevent the harness 20 from being too tight, which will hinder the above passability, it is necessary to first keep the harness 20 in a certain degree of relaxation. At this time, the harness 20 passes through the structural setting of the positioning holes 3125 on the main wire plate 3141 and the branch wire plate 3142, or the harness 20 passes through the structural setting of the positioning holes 3125 on the ring plate 3124, so that when the harness 20 is relaxed, there will be no interference or confusion between the harnesses 20 and the surrounding components. In this way, in operation, the harness 20 can be quickly put into working state and function normally by turning the knob 3111.

[0114] In the operating portion 3 of the electronic endoscope 1 provided by the above embodiment of the present invention, the length of the wire harness 20 disposed in the housing 30 is greater than the path of the wire harness 20 in the housing 30 .

[0115] As mentioned above, the housing 30 of the operating part 3 is also provided with an auxiliary port 306 and an instrument port 307, and as mentioned above, the insertion part 2 extends proximally into the housing 30 of the operating part 3 and protrudes from the proximal end surface of the sheath 32. As mentioned above, the part protruding from the proximal end surface of the sheath 32 into the housing 30 is specifically the flexible tube part 23 of the insertion part 2, and a working channel 224, a cable channel 223, and a harness channel 226 are provided inside the flexible tube part 23. In other embodiments, an auxiliary channel 225 may also be provided.

[0116] The instrument port 307 is provided with a Luer connector 3071, which is connected to the working channel 224 of the flexible tube portion 23 through a stainless steel tube 3072. The auxiliary port 306 is provided with a sheath 3061, which is connected to the auxiliary channel 225 of the flexible tube portion 23 through a stainless steel tube 3062 (the connection state between the auxiliary port 306 and the stainless steel tube 3062 is not shown in the figure).

[0117] In other embodiments, an electronic control unit 33 is further disposed in the housing 30 of the operating unit 3, and a key 331 of the electronic control unit 33 protrudes from the key port 308 on the housing 30 to the outside of the housing 30 for use by an operator. An electronic output port 332 may also be disposed on the housing 30 of the operating unit 3, and the electronic control unit 33, the camera unit 212, the lighting unit 213, and the electronic output port 332 realize the required power supply and data transmission through the cable 24.

[0118] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electronic endoscope, comprising an insertion portion and an operation portion connected to each other in sequence, characterized in that: The insertion portion includes a front end portion and a curved portion, the distal end surface of the front end portion has an inclined surface, the inclined surface and the distal end surface of the front end portion intersect to form a ridge line, and the ridge line is parallel to the bending direction of the curved portion; the curved portion includes a wire harness channel and a working channel that penetrate the curved portion along the axial direction, the intersection of the axis of the wire harness channel and the distal end surface of the curved portion is located at an eccentric position relative to the axis of the curved portion, and most of the working channel is located in the inclined surface; The line between the axis of the wire harness channel and the intersection of the distal end surface of the curved portion is parallel to the ridge line; The operating part includes an operating mechanism, which includes a control part, a follower part and a locking part; the control part includes a knob and a rotating shaft, one end of the rotating shaft is fixed to the knob, and the other end is provided with teeth on the outer periphery; the operating part includes a shell, a knob opening is provided on the shell, and the follower part includes a follower ring, the outer periphery of one end of the follower ring close to the knob opening is provided with external teeth meshing with the teeth on the outer periphery of the rotating shaft, and the inner periphery of the end away from the knob opening is provided with internal teeth; the locking part has a pointed protrusion, and when locking is performed, the pointed protrusion on the locking part engages or meshes with the external teeth of the follower ring, so that the follower ring cannot rotate, thereby achieving locking.

2. The electronic endoscope according to claim 1, characterized in that: The inclined surface faces the side of the operating part, and the rotating shaft coincides with the axis of the knob; the operating part includes a shell, and a limit block is provided on the end face of the knob facing inward, which cooperates with the limit block arranged on the outer side of the shell to limit the maximum rotation angle of the knob.

3. The electronic endoscope according to claim 1, characterized in that: An instrument opening is arranged on the shell of the operating part, and the inclined surface faces one side of the instrument opening.

4. The electronic endoscope according to claim 1, characterized in that: The knob mouth is circular and is provided with a ring. The ring coincides with the axis of the knob mouth and extends to the inner and outer sides of the shell to form flanges. The flange extending inward is the inner flange, and the flange extending outward is the outer flange. The inner diameter of the outer tooth end of the follower ring is larger than the inner flange, so that the outer tooth end of the follower ring can be mounted on the inner flange and can rotate.

5. The electronic endoscope according to claim 4, characterized in that: The follower ring is provided with three ring plates protruding from the circumference in the radial direction, and the ring plates are provided with positioning holes; the locking component includes a locking mechanism, a petal-shaped block and a locking block; the locking mechanism includes a circular ring, a handle and a cross block fixedly connected to each other; the handle is arranged on one side of the circular ring and is located in the same plane as the circular ring, and the cross block is arranged on the handle; the shell is provided with a cross slot hole corresponding to the cross block, and the cross block extends into the shell through the cross slot hole and is fixedly connected to the petal-shaped block located in the shell.

6. The electronic endoscope according to claim 1, characterized in that: The front end portion comprises a base, and a camera unit and two lighting units are arranged at the far end of the base. The two lighting units are respectively located at two sides of the camera unit.

7. The electronic endoscope according to claim 5, characterized in that: The curved portion includes an auxiliary channel, which is watertight; a groove that can be engaged with the cross block is arranged inside the outward end of the petal-shaped block; a positioning block is provided on the edge of the circular ring, and the positioning block extends inward from the outer edge of the inner end face of the circular ring, and forms a step protruding outward relative to the axis of the circular ring at the extended terminal.

8. The electronic endoscope according to claim 7, characterized in that: The intersection of the auxiliary channel and the distal end surface of the front end portion is located in the area outside the inclined surface; the locking component also includes an annular groove for placing an elastic gasket, so that the elastic gasket can be retained in the annular groove and located between the ring and the shell.

9. The electronic endoscope according to claim 7, characterized in that: There are two auxiliary channels, and the intersections of the two auxiliary channels and the distal end faces of the front end portion are respectively close to the two lighting units; a slot is provided on the shell, and the positioning block provided on the edge of the circular ring extends into the slot and engages with the edge of the slot through the step protruding from the terminal of the positioning block, so that the circular ring can be assembled on the shell.

10. The electronic endoscope according to claim 1, characterized in that: The insertion portion further comprises a flexible tube portion, the front end portion, the curved portion and the flexible tube portion are all provided with a working channel penetrating along the axial direction, and the working channels of the front end portion, the curved portion and the flexible tube portion are connected through a pipe fitting.

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