阅读说明：本技术 电子内窥镜 (Electronic endoscope ) 是由 周益峰 张剑 刘孟华 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种电子内窥镜,包括依次相互连接的插入部和操作部,插入部包括前端部和弯曲部,前端部的远端端面具有倾斜面,倾斜面与前端部的远端端面交叉形成一棱线,棱线与弯曲部的弯曲方向平行。本发明提供的电子内窥镜能够针对使用环境低成本地实现较好的通过性。(The invention discloses an electronic endoscope, which comprises an insertion part and an operation part which are sequentially connected with each other, wherein the insertion part comprises a front end part and a bending part, the distal end face of the front end part is provided with an inclined surface, the inclined surface and the distal end face of the front end part are crossed to form a ridge, and the ridge is parallel to the bending direction of the bending part. The electronic endoscope provided by the invention can realize better trafficability at low cost aiming at the use environment.)

1. An electronic endoscope comprises an insertion part and an operation part which are sequentially connected with each other, and is characterized in that the insertion part comprises a front end part and a bending part, the far end face of the front end part is provided with an inclined face, the inclined face and the far end face of the front end part are crossed to form a ridge line, and the ridge line is parallel to the bending direction of the bending part.

2. The electronic endoscope of claim 1, wherein the inclined surface faces a side surface of the operation portion.

3. The electronic endoscope of claim 1, wherein the housing of the operation section is provided with an instrument opening, and the inclined surface faces a side of the instrument opening.

4. The electronic endoscope of claim 1, wherein the bending portion includes a harness passage extending axially through the bending portion, an intersection of an axis of the harness passage and a distal end face of the bending portion being located at an eccentric position with respect to the axis of the bending portion.

5. The electronic endoscope of claim 4, wherein a line connecting an axis of the harness passage and an intersection of the distal end surface of the bending portion is parallel to the ridge line.

6. The electronic endoscope of claim 1 wherein said distal end portion comprises a base having a distal end provided with a camera unit and two illumination units, one on each side of said camera unit.

7. The electronic endoscope of claim 1 wherein the bending section includes an auxiliary channel, the auxiliary channel having water tightness.

8. The electronic endoscope of claim 7 wherein the intersection of the auxiliary channel with the distal end face of the tip portion is located in a region outside the inclined face.

9. The electronic endoscope of claim 7 wherein there are two of said auxiliary channels, and the intersections of the two auxiliary channels with the distal end surface of the distal end portion are respectively adjacent to the two illumination units.

10. The electronic endoscope of claim 1, wherein the insertion portion further comprises a flexible tube portion, the tip portion, the bending portion, and the flexible tube portion are each provided with a working channel that passes therethrough in the axial direction, and the tip portion, the bending portion, and the working channel of the flexible tube portion are communicated with each other through a tube.

Technical Field

The invention relates to the field of medical instruments, in particular to an electronic endoscope.

Background

Endoscopic Retrograde cholangiopancreatography (ERCP, english name: enteroscopy Cholangio-Pancreatography) is a technique in which a duodenoscope is inserted into the descending part of the duodenum, the papilla of the duodenum is found, a contrast catheter is inserted into the biopsy channel to the opening of the papilla, and after a contrast agent is injected, x-ray radiography is performed to display the cholangiopancreatography. On the basis of ERCP, the interventional therapy such as duodenal papilla sphincterotomy, endoscopic nasal bile drainage, endoscopic stone extraction and the like can be carried out, and the interventional therapy is popular with patients due to no need of operation and small wound. The interventional therapy usually requires that an interventional therapy instrument passes through an instrument channel (or called a working channel, a clamp channel and the like) of the duodenoscope and enters a bile pancreatic duct through a duodenal papilla for interventional therapy. When the interventional device is an endoscope, the duodenoscope may be understood as a parent endoscope or a parent endoscope.

However, the endoscope, which is currently marketed as an interventional therapy device, is complex in structure, expensive, and can only be reused. Therefore, there is a need for an endoscope that can substantially fulfill the functions of the endoscope as an interventional treatment device, and that is also low in cost.

Disclosure of Invention

The invention aims to solve the problem of high cost of an endoscope as an interventional therapy instrument. The invention provides an electronic endoscope which can be used as an interventional therapy instrument and is lower in cost.

In order to solve the above-described problems, an embodiment of the present invention discloses an electronic endoscope including an insertion portion and an operation portion connected to each other in this order, the insertion portion including a distal end portion and a bending portion, a distal end face of the distal end portion having an inclined surface, the inclined surface intersecting with the distal end face of the distal end portion to form a ridge, the ridge being parallel to a bending direction of the bending portion.

By adopting the technical scheme, the electronic endoscope provided by the invention has good trafficability in the vertical direction perpendicular to the bending direction through the arrangement of the inclined surface; the electronic endoscope provided by the invention has good passing performance in the bending direction by actively controlling the bending direction; moreover, through the movement or rotation of the operation part, the electronic endoscope provided by the invention can be matched by utilizing the inclined surface, the active control of the bending direction or the active control of the inclined surface and the bending direction according to actual conditions so as to realize trafficability under different scenes. Most importantly, the technical scheme has simple structure and can be manufactured at low cost.

The different scenes at least include passing through the working channel of the mother endoscope (or called instrument channel or clamp channel, etc.) or entering the duodenal papilla. Namely, the electronic endoscope provided by the invention has good passing performance when passing through a mother endoscope preset in a human body in advance; the electronic endoscope provided by the invention has good passing performance when passing through the mother endoscope and entering the duodenal papilla. Further, the advantage of the above passing property is obtained at low cost by the cooperation with the operation portion.

Alternatively, the inclined surface faces a side surface of the operation portion.

Optionally, the housing of the operation portion is provided with an instrument opening, and the inclined surface faces the instrument opening.

Optionally, the bend includes a harness passage extending axially through the bend, an intersection of an axis of the harness passage and the distal end face of the bend being located off-center with respect to the axis of the bend.

Optionally, a line connecting the intersection of the axis of the harness passage and the distal end face of the curved portion is parallel to the ridge line.

Optionally, the front end portion includes a base, and a distal end of the base is provided with a camera unit and two illumination units, which are respectively located at two sides of the camera unit.

Optionally, the curved portion comprises an auxiliary channel, the auxiliary channel having water tightness.

Optionally, the intersection of the auxiliary passage with the distal end face of the leading end portion is located in a region other than the inclined face.

Optionally, the number of the auxiliary channels is two, and the intersections of the two auxiliary channels and the distal end surface of the front end portion are respectively close to the two lighting units.

Optionally, the insertion portion further comprises a flexible tube portion, the front end portion, the bending portion and the flexible tube portion are provided with working channels which penetrate along the axial direction, and the front end portion, the bending portion and the working channels of the flexible tube portion are communicated through pipe fittings.

Drawings

Fig. 1 is a front view showing a structure of an electronic endoscope according to an embodiment of the present invention.

Fig. 2 is a bottom view showing the structure of an insertion portion according to an embodiment of the present invention.

Fig. 3 is a left side view showing a structure of an insertion portion according to an embodiment of the present invention.

Fig. 4 shows a cross-sectional view along a-a in fig. 2.

Fig. 5 is a bottom view showing a bent state of the bending portion in the left-right direction thereof.

Figure 6a shows a cross-sectional view along the junction of the nose portion and the bend of figures 3B-B.

Figure 6B shows a cross-sectional view along the junction of the bend and the flexible tube portion of figure 3B-B.

Figure 6C shows a cross-sectional view along the junction of the nose portion and the bend of figures 3C-C.

Figure 6d shows a cross-sectional view along the junction of the bend and the flexible tube portion of figures 3C-C.

Fig. 7a is a perspective view showing an internal structure of an operation unit according to an embodiment of the present invention.

Fig. 7b is a front view showing an internal structure of the operation unit according to the embodiment of the present invention.

Fig. 8a is a perspective view showing a part of the internal structure of the operation unit according to the embodiment of the present invention.

Fig. 8b is a front view showing a part of the internal structure of the operation unit according to the embodiment of the present invention.

Fig. 9 is a perspective view showing a rear structure of the operation unit according to an embodiment of the present invention.

Fig. 10 is a perspective view showing the structure of a lock mechanism provided in an embodiment of the present invention.

Fig. 11 is a perspective view illustrating a structure of a petal-shaped block according to an embodiment of the present invention.

Fig. 12 is a perspective view showing a structure of a control unit according to an embodiment of the present invention.

Fig. 13 is a perspective view showing a structure of a follower portion according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.

In the description of the present embodiment, it should be noted that the terms "near" and "far" are relative positional relationships, and when an operator operates an instrument to treat a target object, along the instrument, the side close to the operator is "near" and the side close to the target object is "far".

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

Embodiments are provided in which the bending portion and/or the flexible tube portion involve multiple channels or lumens in order to perform some functions of an endoscope as an interventional treatment instrument. In this regard, the depiction of a "channel" or "lumen" is primarily with respect to a curved and/or flexible tube portion that is substantially solid. The passageway or lumen in which the curved portion and/or flexible tube portion of the embodiments of the present invention are associated may be a conduit or pathway if the curved portion and/or flexible tube portion does not assume a solid, e.g., a substantially hollow, condition. That is, the channels or lumens in the bends and/or flexible tubing portions in embodiments provided by the present invention may also be conduits or pathways, so long as the desired pathways are provided for the respective components.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Endoscopic Retrograde cholangiopancreatography (ERCP, english name: enteroscopy Cholangio-Pancreatography) is a technique in which a duodenoscope is inserted into the descending part of the duodenum, the papilla of the duodenum is found, a contrast catheter is inserted into the biopsy channel to the opening of the papilla, and after a contrast agent is injected, x-ray radiography is performed to display the cholangiopancreatography. On the basis of ERCP, the interventional therapy such as duodenal papilla sphincterotomy, endoscopic nasal bile drainage, endoscopic stone extraction and the like can be carried out, and the interventional therapy is popular with patients due to no need of operation and small wound. The interventional therapy usually requires that an interventional therapy instrument passes through an instrument channel (or called a working channel, a clamp channel and the like) of the duodenoscope and enters a bile pancreatic duct through a duodenal papilla for interventional therapy. When the interventional device is an endoscope, the duodenoscope may be understood as a parent endoscope or a parent endoscope.

However, the endoscope which is currently marketed as an interventional therapy instrument is complex in structure and expensive, and brings another problem while the ERCP operation and the corresponding interventional therapy are realized.

On 6.8.2019, U.S. New York Times published an article entitled "where Are the Medical Instruments So Tough to Sterilize" by Roni Caryn Rabin the name of Roni. The title is translated by 36 krypton (36kr. com) as "endoscope to 50 million patients per year, why are so difficult to disinfect? In the section of large-bore animals. Writing in the article: in medical institutions around the world, diagnostic and treatment of diseases such as pancreas and bile ducts require the use of a tool such as a coiled duodenoscope (duodenoscope). However, these fiber optic components suffer from a significant disadvantage: although it can be inserted into the upper small intestine through the mouth and reused, it cannot be sterilized in a conventional manner. Typically, they are hand washed and then cleaned again in a dishwasher-like machine. During the re-cleaning process, special chemicals are also added to destroy the microorganisms. Even if each procedure is cleaned to exacting requirements, bacteria may remain on these devices and the patient may become infected as a result. Indeed, in many medical institutions in the united states and europe, cases of duodenoscopically infected patients occur, and up to hundreds of cases. However, according to a recent test, the relevant regulatory authorities have seriously underestimated the risks behind them. Worse still, these devices can even cause the spread of drug resistant infections, which currently have few cure options.

Obviously, the endoscope as an interventional treatment instrument has the same problems as described above.

Therefore, there is an urgent need for an endoscope that can perform the above-mentioned functions of diagnosing and treating diseases of the pancreas and bile duct, etc., and can prevent infection due to incomplete cleaning. In addition, it is important that it is also low cost, otherwise it remains difficult for the patient to use. Obviously, when the cost is low to a certain degree, the endoscope with low cost can be used as a disposable endoscope, and the problem that the endoscope cannot be thoroughly cleaned to cause secondary infection is thoroughly solved.

The invention provides an electronic endoscope which can be used as an interventional therapy instrument for the ERCP operation and can achieve the purpose, and a corresponding independently manufactured and used component contained by the electronic endoscope.

In order to describe the orientation, the electronic endoscope 1 according to the embodiment of the present invention is provided in which the knob 3111 on the operation section 3 is positioned on the front surface of the operation section 3. The operation section 3 is provided with an instrument opening 307, and the instrument opening 307 is located on a side surface of the operation section 3. The inclined surface 211 faces the side surface of the operation portion 3. The inclined surface 211 faces the instrument opening 307 side.

Fig. 1 is a front view showing a structure of an electronic endoscope according to an embodiment of the present invention. As shown in fig. 1, an electronic endoscope 1 according to an embodiment of the present invention includes an elongated insertion portion 2, and an operation portion 3 provided on a proximal end side of the insertion portion 2. That is, the present invention provides an electronic endoscope 1 including an insertion section 2 and an operation section 3 connected to each other.

Fig. 2 is a bottom view showing the structure of an insertion portion according to an embodiment of the present invention. As shown in fig. 2, the insertion portion 2 is provided with a tip portion 21, a curved portion 22, and a flexible tube portion 23 in this order from the distal end.

Fig. 3 is a left side view showing a structure of an insertion portion according to an embodiment of the present invention. As shown in fig. 3 in combination with fig. 1 and 2, the distal 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. It will be understood by those skilled in the art that the "cut-away" is for the convenience of visual understanding of the shape of the inclined surface 211, and is not a limitation on the forming process of the inclined surface 211.

Continuing as shown in fig. 3. The base 210 is further provided with a plurality of cavities which axially penetrate through the base 210, wherein the cavities comprise a cavity for fixing the camera shooting unit 212, a cavity for fixing the illuminating unit 213 and a working channel 214 for allowing a working instrument to pass through. Wherein, as shown in fig. 3, most of the area of the working channel 214 is located in the inclined surface 211, when the base 210 is viewed from the distal end side.

By adopting the technical scheme, the electronic endoscope provided by the invention has good trafficability in the vertical direction perpendicular to the bending direction through the arrangement of the inclined surface; the electronic endoscope provided by the invention has good passing performance in the bending direction by actively controlling the bending direction; moreover, through the movement or rotation of the operation part, the electronic endoscope provided by the invention can be matched by utilizing the inclined surface, the active control of the bending direction or the active control of the inclined surface and the bending direction according to actual conditions so as to realize trafficability under different scenes. Most importantly, the technical scheme has simple structure and can be manufactured at low cost. The above-described advantage of low cost is embodied in the various structures of the electronic endoscope provided by the present invention.

The base 210 may further include an auxiliary passage 215, and the auxiliary passage 215 allows clean water to pass therethrough. It will be appreciated by those skilled in the art that this embodiment uses water as an example, and is primarily for the purpose of intuitively explaining that the auxiliary channel 215 may be provided with corresponding features according to the object to be passed through, i.e. when the auxiliary channel 215 is used as a channel for water, it should be substantially sealed and capable of withstanding a certain pressure, and it can be ensured that water is properly transported to the far end of the base 210 and normally performs the functions of flushing and the like, rather than limiting that the auxiliary channel 215 only allows water to pass through. In the present embodiment, the auxiliary channel 215 is provided in two.

The insertion section 2 of the electronic endoscope 1 according to the above-described embodiment of the present invention is provided in which the intersection of the auxiliary channel 215 and the distal end surface of the distal end portion 21 is located in a region other than the inclined surface 211.

The applicant finds that the lighting units which are symmetrically arranged in pairs can enable the image shot by the camera unit to be clearer and have less dead angles relative to one lighting unit. Therefore, in the present embodiment, on the base 210, which may be small in size in an actual product, there are still provided the illumination units 213 respectively located at both sides of the camera unit 212. The applicant believes that it is worth providing at least the two lighting units 213 described above even if the dimensions of the other cavities are forced to become smaller as a result.

The above-described embodiment of the present invention provides the insertion section 2 of the electronic endoscope 1, wherein the two fixed illumination units 213 are located on both sides of the image pickup unit 212. The intersections of the two auxiliary channels 215 with the distal end face of the front end portion 21 are respectively close to the two illumination units 213.

The base 210 should be rigid, and the definition of rigid here is understood that when the electronic endoscope 1 provided by the present embodiment works in the human body, the base 210 should be able to bear corresponding pressure, and overcome corresponding resistance, so that the camera unit 212, the illumination unit 213, the working channel 214, and the auxiliary channel 215 provided thereon can be stably held. The base 210 may be made of rigid plastic, or other materials that meet the above requirements. Such as metal, surface-glazed ceramic, melamine resin.

The insertion section 2 of the electronic endoscope 1 according to the above-described embodiment of the present invention is provided with the imaging unit 212 at both ends of the transverse section of the distal end portion 21 so as to face the working channel 214. The cross section is a section perpendicular to the axis of the front end portion 21.

Fig. 4 shows a cross-sectional view along a-a in fig. 2. Fig. 4 shows a schematic cross-sectional view of a flexure 22 provided in accordance with an embodiment of the present invention. In the present embodiment, the cross-sections of the bending portion 22 and the flexible tube portion 23 have substantially the same structure, and are provided with a lumen extending therethrough in the axial direction, including a cable channel 223 and a working channel 224. An auxiliary channel 225 may also be provided according to the foregoing description. As previously described, the auxiliary channel 225 may be provided to have water tightness.

The arrangement of the inner structures of the bending portion 22 and the flexible tube portion 23 corresponds to the inner structure of the base 210. Specifically, the imaging unit 212 and the illumination unit 213 provided on the base 210 require the cable 24 such as an electric wire and a data wire to be provided through the bending portion 22 and the cable passage 223 in the flexible tube portion 23. Where cables 24 are shown in this application as being electrically conductive to provide power or to transfer electronic data. The working channel 214 provided on the base 210 requires the bending portion 22 and the flexible tube portion 23 to be provided with corresponding working channels 224, so that the instruments and the like required to pass through the working channels 214, 224 can pass through the flexible tube portion 23, the bending portion 22 and the base 210 from the proximal end to enter the human body or the object to be detected. When the auxiliary channel 215 is provided on the base 210, the bending portion 22 and the flexible tube portion 23 may also be provided with a corresponding auxiliary channel 225 and cooperate with the auxiliary channel 215.

The insertion section 2 of the electronic endoscope 1 according to the above-described embodiment of the present invention is provided with the cable passage 223 at both ends of the cross section of the bending section 22 opposite to the working passage 224. The cross section is a section perpendicular to the axis of the front end portion 21.

As shown in fig. 4, the bending portion 22 and the flexible tube portion 23 are provided with a harness passage 226 inside, which is provided mainly for the purpose of achieving bending control of the bending portion 22, in contrast to the internal structure of the base 210. The wire harness 20 can be placed in the wire harness passage 226, and the wire harness 20 is passed through the operation part 3, the flexible tube part 23, the bending part 22 in order from the operation mechanism 31 located at the operation part 3, and finally fixed at an eccentric position of the distal end of the bending part 22. Thus, when the operator controls the operating mechanism 31 to pull the wire harness 20 tight, the wire harness 20 will act on the eccentric position of the distal end of the bent portion 22, so that the bent portion 22 is bent toward the eccentric position. That is, what determines the bending direction of the bending portion 22 is the position where the harness passage 226 is disposed on the distal end face of the bending portion 22. By setting the fixing point of the wire harness 20 at the distal end of the bending portion 22 at different eccentric positions, the bending direction of the bending portion 22 can be controlled. In order to achieve the bidirectional bending of the bending portion 22, in the present embodiment, the applicant provides two wire harnesses 20, and connects the proximal ends of the two wire harnesses 20 to the operating mechanism 31, and the distal ends thereof extend along the above-mentioned path and are fixed to different eccentric positions of the distal end of the bending portion 22, respectively, to achieve the bidirectional bending of the bending portion 22. In order to realize the bending angle of the bent portion 22 in one direction as large as possible, the fixing positions of the two wire harnesses 20 at the distal end of the bent portion 22 may be arranged to be opposed to each other. That is, the bending portion 22 includes two harness passages 226, and intersections of the two harness passages 226 with the distal end surface of the bending portion 22 are provided in mirror images at the left and right ends of the distal end surface of the bending portion 22 (fig. 4). In some embodiments, it may be also provided at the middle position of the distal end surface of the bending portion 22 in the up-down direction, which is beneficial to achieve the maximum bending angle of the bending portion 22. In other words, the intersections of the two harness passages 226 with the distal end surface of the bent portion 22 are disposed symmetrically with respect to a longitudinal section passing through the axis of the working passage 224.

Fig. 5 is a bottom view showing a bent state of the bending portion in the left-right direction thereof.

The insertion section 2 of the electronic endoscope 1 according to the above-described embodiment of the present invention is provided, wherein the bending section 22 includes the cable passage 223, the working passage 224, and the harness passage 226 penetrating the bending section 22, wherein an intersection of an axis of the harness passage 226 and a distal end surface of the bending section 22 is located at an eccentric position with respect to the axis of the bending section 22. That is, the axis of the harness passage 226 does not coincide with the axis of the bending portion 22. When the auxiliary passage 225 is provided, the intersections of the two harness passages 226 with the distal end surface of the bent portion 22 are respectively close to the intersections of the two auxiliary passages 225 with the distal end surface of the bent portion 22.

In the present invention, the connecting line between the intersections of the two harness passages 226 and the distal end surface of the bent portion 22 is substantially parallel to the ridge 216, which ensures that the ridge 216 is substantially parallel to the bending direction of the bent portion 22.

When the operator controls the wire harness 20 to bend the bending portion 22 to one side, the flexible tube portion 23 may also be bent at a certain angle. In the present embodiment, in order to make the control of the operator more precise, the material of the flexible tube portion 23 is set to be harder with respect to the bending portion 22, so that when the operator controls the bending portion 22 to bring the front end portion 21 to bend by the wire harness 20, the flexible tube portion 23 is not substantially bent, so that the position of the front end portion 21 can be easily controlled. In other embodiments, the material of the flexible tube portion 23 may be the same as that of the curved portion 22, depending on the purpose, so as to control the follow-up action of the flexible tube portion 23 in accordance with the action of the curved portion 22, if necessary. Although in the above embodiments only the bending of the bending portion 22 and the flexible tube portion 23 is controlled by material selection, it will be understood by those skilled in the art that the control of the bending angle of the bending portion 22 and the following movement of the flexible tube portion 23 can be achieved by controlling different specifications of the same material, or by providing different portions with different materials or different specifications of the same material. In order to achieve a relatively less flexible tube portion 23 and a relatively more flexible bend portion 22, on the one hand, material for attachment to the inner and outer parts of both (e.g. outer cover, outer coating material, inner cover attached to the inner wall, inner coating material) may be considered, and on the other hand, material for the tubing in place of the channel or lumen may be considered. At this time, since the tube is used to replace the passage or the cavity, it is obviously disposed inside the bent portion 22 and/or the flexible tube portion 23. In addition, the structure can be realized by the structures of the components, such as the spring tube, besides the material.

The above-described embodiment of the present invention provides the insertion section 2 of the electronic endoscope 1 in which the material of the bending section 22 or the material attached to the bending section 22 is less rigid, i.e., softer, and more easily bendable than the material of the flexible tube section 23 or the material attached to the flexible tube section 23. Alternatively, the material or construction of the tubing disposed within the bend 22 is less rigid, i.e., softer, and more easily bent, than the material or construction of the tubing within the flexible tube portion 23. For example, a tube can be supported by a spring tube, which can be more easily bent with a sparser array or a smaller wire diameter.

In the case of providing two wire harnesses 20 and providing two wire harness passages 226 in the bending portion 22 and the flexible tube portion 23 as described above, one end of one entire wire harness 20 may be inserted into one wire harness passage 226 from the proximal end side of the flexible tube portion 23, passed through the flexible tube portion 23 and the bending portion 22 in order and extended from the distal end side of the bending portion 22 (at this time, the bending portion 22 is not connected to the distal end portion 21), and then inserted into the other wire harness passage 226 from the distal end side of the bending portion 22 and extended from the proximal end side of the flexible tube portion 23. That is, one wire harness 20 is passed through the bending portion 22 and the harness passage 226 of the flexible tube portion 23 and formed into a U-shape in which the opening of the U-shape is located outside the proximal end of the flexible tube portion 23 and the closed end of the U-shape is located outside the distal end of the bending portion 22. Then, the portion of the wire harness 20 located outside the distal end of the bent portion 22 at this time is fixed to the distal end face of the bent portion 22, for example, by gluing or welding, so that the quick installation of the wire harness 20 can be achieved. The installation method can obviously improve the working efficiency.

The above-described embodiment of the present invention provides a wire harness 20 for bending control of an electronic endoscope 1, a method of mounting to an insertion portion 2, the insertion portion 2 including a bending portion 22 and a flexible tube portion 23, the bending portion 22 and the flexible tube portion 23 each being provided with two axially extending harness passages 226, the mounting method including:

inserting one end of a wire harness 20 into a wire harness passage 226 from the proximal end side of the flexible tube portion 23;

projecting the one end of the wire harness 20 from the distal end of the bent portion 22;

inserting the one end of the wire harness 20 from the distal end of the bent portion 22 into the other wire harness passage 226;

extending the one end of the wire harness 20 from the proximal end of the flexible tube portion 23;

a portion of the wire harness 20 protruding from the distal end of the bent portion 22 is fixedly connected to the bent portion 22.

As an example of a usage scenario of the embodiment of the present invention, in ERCP endoscopic retrograde cholangiopancreatography, a mother endoscope is inserted into the duodenum through the mouth, and the electronic endoscope provided in the present embodiment is inserted into the duodenal papilla (the common opening of the bile duct and the main pancreatic duct in the duodenum) through the ocular endoscope, and various necessary operations are performed. The applicant finds that the electronic endoscope provided by the embodiment needs to pass through a corresponding channel (such as a working channel, or called an instrument channel, or called a clamp channel, and the like) in the mother endoscope and is inserted into the duodenal papilla, and the passing requirement is high. Among them, since the distal end portion 21 in the present embodiment is located at the most forward end of the electronic endoscope 1, the passability thereof is most important. The applicant has found in practice that the factors affecting the passability of the front end portion 21 are mainly the distal end shape of the front end portion 21 and the support of the front end portion 21 by the bent portion 22.

The distal end shape of the tip portion 21 is one of the factors that affect the passability of the tip portion 21. As described above, in the present embodiment, the front end portion 21 includes the pedestal 210, and the pedestal 210 is provided with the inclined surface 211. As shown in fig. 3, 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 the ridge 216 can be arranged perpendicular to the axis of the base 210 and parallel to the bending direction of the bending portion 22 without increasing the cost of the electronic endoscope 1 while requiring convenience of operation. While the electronic endoscope 1 provided in the present embodiment is passed through the corresponding channel of the mother endoscope, the applicant has found that a better passability of the leading end portion 21 can be achieved by the material selection of the bending portion 22 and/or the flexible tube portion 23. Meanwhile, the applicant has found that in order to increase the passability, the bending portion 22 and/or the flexible tube portion 23 may be configured to be flexibly bent according to the structure of the corresponding channel of the mother endoscope by the structural arrangement of the operation portion 3 (see the detailed structure later), without being improperly restrained by the wire harness 20. When the distal end portion 21 and the bending portion 22 of the electronic endoscope 1 provided in the present embodiment are extended out of the mother endoscope, bending in the left-right direction (parallel to the ridge line 216) of the bending portion 22 can be achieved by controlling the aforementioned wire harness 20; the bending in the vertical direction (perpendicular to the ridge line 216) can be easily achieved by rotating the entire external electronic endoscope 1 by a predetermined angle (rotating the bending portion 22) and then controlling the bending with the wire harness 20. Therefore, the trafficability can be ensured, and the cost can be reduced.

The insertion section 2 of the electronic endoscope 1 according to the above embodiment of the present invention includes the distal end portion 21 and the bending portion 22, the distal end surface of the distal end portion 21 has the inclined surface 211, the inclined surface 211 intersects with the distal end surface of the distal end portion 21 to form the ridge line 216, and the ridge line 216 is parallel to the bending direction of the bending portion 22.

The supporting strength of the bent portion 22 to the distal end portion 21 is also an influence factor that influences the passability of the distal end portion 21. When the electronic endoscope 1 provided in the present embodiment needs to enter a narrow tissue of a human body, for example, a duodenal papilla, the support of the distal end portion 21 from the proximal end thereof is important. If the support is too weak, successful access against resistance is difficult. The applicant has found that one of the alternatives to this is to improve the connection between the front end portion 21 and the bend 22. In this embodiment, the support is realized from the inner support and the outer support. In fact, through a number of experiments, the applicant has found that the support can be achieved by providing the inner support alone, the outer support alone and both the inner and outer supports.

Figure 6a shows a cross-sectional view along the junction of the nose portion and the bend of figures 3B-B. Figure 6B shows a cross-sectional view along the junction of the bend and the flexible tube portion of figure 3B-B. Figure 6C shows a cross-sectional view along the junction of the nose portion and the bend of figures 3C-C. Figure 6d shows a cross-sectional view along the junction of the bend and the flexible tube portion of figures 3C-C.

The inner support, as shown in fig. 6a, may be a stainless steel tube 201 with a flared end (not shown), a distal end of the stainless steel tube is disposed in the working channel 214 of the base 210, and a flared proximal end of the stainless steel tube is disposed in the working channel 224 of the bending portion 22, and generally forms an interference fit, so that the stainless steel tube 201 is connected with the base 210 and the bending portion 22 more stably. And also more easily through the junction of the bend 22 and the foot 210 due to the flare arrangement as the instrument is advanced along the working channel from the proximal end to the distal end. As shown in fig. 6c, a stainless steel tube 201a having a distal end disposed in the auxiliary channel 215 of the base 210 and a proximal end disposed in the distal end of the bending portion 22 may be further provided, so as to perform an inner supporting function while preventing water leakage between the bending portion 22 and the base 210.

As shown in fig. 6a and 6c, the outer support is a stainless steel tube 202 which partially surrounds the base 210 and partially surrounds the distal end of the bending portion 22. The stainless steel tube 202 hoops the base 210 and the distal end of the curved portion 22, thereby preventing the leakage of the joint between the base 210 and the curved portion 22 and achieving the aforementioned supporting purpose. In the above embodiment, when each stainless steel pipe is provided, the influence of the length thereof on the bending angle of the bending portion 22 needs to be considered. Through repeated tests by the applicant, it is considered that the stainless steel pipe 201 having a standard of 8 mm is easy to achieve both the passing property and the bending control. Wherein, the part of the base 210 can be extended below 4 mm, and 2-3.5 mm can be selected. The stainless steel tube 202 may have a size of 5 to 10 mm long, wherein 6 mm long facilitates both passability and bending control, and the portion covering the base 210 and the portion covering the bending portion 22 are about half each, and the portion covering the base 210 may be selected to be smaller than the portion covering the bending portion 22.

In the insertion section 2 of the electronic endoscope 1 according to the above embodiment of the present invention, the working channel 214 of the distal end portion 21 and the working channel 224 of the bending portion 22 communicate with each other through a pipe (in this embodiment, a stainless steel pipe 201). The pipe member (stainless steel pipe 201) communicating the working passage 214 of the front end portion 21 and the working passage 224 of the curved portion 22 has a flare opening facing the curved portion 22 and placed in the working passage 224 of the curved portion 22. The auxiliary passage 215 of the distal end portion 21 and the auxiliary passage 225 of the bending portion 22 communicate with each other through a pipe member (stainless steel pipe 201a in this embodiment). The outer sides of the pipe members communicating with the auxiliary passage 215 of the distal end portion 21 and the auxiliary passage 225 of the bending portion 22 are watertightly connected to the auxiliary passage 215 of the distal end portion 21 and the auxiliary passage 225 of the bending portion 22. The front end portion 21 and the bent portion 22 are connected to each other by a pipe member (in the present embodiment, a stainless steel pipe 202) that is crimped from the outside to the joint between the front end portion 21 and the bent portion 22.

Similarly, in order to connect the flexible tube portion 23 and the bending portion 22, or in order to support the bending portion 22 by the flexible tube portion 23, the inner and outer supports may be separately provided or the inner and outer supports may be provided at the same time. Since the cross-sectional configurations of the curved portion 22 and the flexible tube portion 23 are substantially identical, providing internal support, as shown in fig. 6b and 6d, 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 having a distal end disposed in the auxiliary channel 225 at the proximal end of the bending portion 22 and a proximal end disposed in the auxiliary channel 225 at the distal end of the flexible tube portion 23 may be separately or additionally provided. The outer support is provided by providing a stainless steel tube 204 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, as shown in fig. 6b and 6 d. The stainless steel tube 204 may be a complete steel tube, a spring steel tube having an opening along the axial direction, or a steel tube made of memory alloy or an open steel tube). When the stainless steel pipe 204 has an axial opening, the installation efficiency can be improved. However, due to the existence of the opening, the requirement on the dimensional accuracy of the parts connected by the stainless steel tube 204 is high, otherwise, the end of the opening may be warped, and after the opening is inserted into a human body or an object to be detected, the tissue of the human body or the object to be detected may be scratched, or the stability of installation may be affected, or an internal channel may be extruded. Thus, the selection may be based on a 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, and as with the inner support, it can prevent the joint from leaking and also achieve the purpose of support. Likewise, the lengths of the stainless steel pipes 203, 204, 205 need to be considered to avoid affecting the bending angles of the bending portion 22 and the flexible pipe portion 23. Through trial and error by the applicant, it is believed that the stainless steel tube 203 may be of a gauge 5-10 mm long to allow for ease of both passage and bend control, with about half extending into the bend 22. The stainless steel tube 204 can be 5-12 mm long to allow for ease of passage and bend control, which covers the bend 22 approximately half way. The stainless steel tube 205 may be 5-10 mm long to allow for ease of passage and bend control, with about half extending into the bend 22.

In addition, in the present embodiment, since the wire harness passage 226 is further provided in the flexible tube portion 23 and the bending portion 22, the stainless steel tube 206 may be provided partially in the wire harness passage 226 located at the proximal end of the bending portion 22 and partially in the wire harness passage 226 located at the distal end of the flexible tube portion 23, which may ensure sufficient smoothness when the control wire harness 20 passes through the joint portion, and may also serve as the aforementioned support. The dimensions may be the same as those of the stainless steel tube previously described which provides the internal support.

The insertion section 2 of the electronic endoscope 1 according to the above embodiment of the present invention is configured such that the working channel 224 of the bending section 22 and the working channel 224 of the flexible tube section 23 communicate with each other through a pipe (in this embodiment, the stainless steel tube 203). The harness passage 226 of the bending portion 22 and the harness passage 226 of the flexible tube portion 23 communicate with each other through a pipe (in this embodiment, the stainless steel tube 206). The auxiliary passage 225 of the bending portion 22 and the auxiliary passage 225 of the flexible tube portion 23 communicate with each other through a pipe member (in this embodiment, a stainless steel pipe 205). The outer sides of the pipe members (stainless steel pipes 205 in this embodiment) communicating with the auxiliary passage 225 of the curved portion 22 and the auxiliary passage 225 of the flexible pipe portion 23 are watertightly connected to the auxiliary passage 225 of the curved portion 22 and the auxiliary passage 225 of the flexible pipe portion 23. The curved portion 22 and the flexible tube portion 23 are connected to each other by a pipe member (a stainless steel pipe 204 in the present embodiment) that is crimped to the joint of the curved portion 22 and the flexible tube portion 23 from the outside.

The bending portion 22 and the flexible tube portion 23 are both made of a flexible material, which may be the same or the material of the bending portion 22 may be softer than the material of the flexible tube portion 23. In this example, an extrusion process was used.

In an embodiment of the present invention, the flexible material may beElastomers (polyetheramide block copolymers consisting of rigid polyamide and flexible polyether blocks). The stainless steel pipes can be fixedly connected with the flexible material in an adhesion mode. The stainless steel tube arranged on the outer side can be fixedly connected with the inner-side hooped part by using a single pressing and holding process (by using a pressing and holding machine) or a pressing and holding process and bonding process combined mode. In addition, the flexible materials may be connected to each other by heat fusion, and when the flexible materials are connected to each other by heat fusion, the flexible materials cooled by heat fusion may provide enough support by proper process, and the stainless steel pipes providing inner support or outer support may not be provided between the front end portion 21 and the bent portion 22 and between the bent portion 22 and the flexible pipe portion 23. That is, the fixing connection between the distal end portion 21 and the bent portion 22, and between the bent portion 22 and the flexible tube portion 23 can be achieved by the hot-melt process, and the required inner and outer supports can be provided. Of course, after hot melting, a rough surface is sometimes formed on the outer surface of the flexible material, and this rough surface may cause various problems after entering the human body; sometimes flexible materials joined together by a hot melt process cannot withstand repeated flexing during operation and may break at the joint. Therefore, thisIt will be appreciated by those skilled in the art that, in view of the foregoing, a less costly hot melt process may be used in place of the stainless steel tube and may be suitable for use in a bonding process or crimping process between the stainless steel tube and the flexible material. However, if the support, rough surface and connection strength are considered together, the above various processes and structures may be applied or combined at different positions as needed.

It should be noted that in the present embodiment, the inner and outer supports between the front end portion 21, the bending portion 22 and the flexible tube portion 23 are made of stainless steel tubes, but those skilled in the art will appreciate that the stainless steel tubes are only an alternative, and other supports made of other materials, such as polylactic acid, can be used as long as the strength required for the inner and outer supports and the requirements for rust prevention and surface protection required for entering the human body or the detected object are met.

Fig. 7a is a perspective view showing an internal structure of an operation unit according to an embodiment of the present invention. Fig. 7b is a front view showing an internal structure of the operation unit according to the embodiment of the present invention. Fig. 8a is a perspective view showing a part of the internal structure of the operation unit according to the embodiment of the present invention. Fig. 8b is a front view showing a part of the internal structure of the operation unit according to the embodiment of the present invention.

For clarity of illustration, fig. 8a and 8b have the control portion 311 and the follower portion 312 removed from fig. 7a and 7 b.

As shown in fig. 7a and 7b, the insertion section 2 and the operation section 3 are connected by a sheath 32, and the sheath 32 has a substantially conical shape with a narrowed portion 321 in the middle. The lumen of the sheath 32 allows the insertion part 2 to pass through, i.e., the proximal end of the insertion part 2 extends into the operating part 3 and protrudes from the proximal end face of the sheath 32.

As shown in fig. 7b, the bottom end of the sheath 32 is H-shaped, and the narrow part of the H-shaped part is engaged with the corresponding protruding part on the housing to realize the assembly. The narrow portion 321 in the middle of the sheath 32 may be engaged with a corresponding protruding portion of the housing 30 to achieve the fitting.

As shown in fig. 7a, 7b, 8a and 8b, the operation portion 3 may be formed by a housing 30 having an internal cavity, and in this embodiment, the housing 30 is provided with an auxiliary port 306, an instrument port 307, a key port 308 and a knob port 301. When the operator grips the operating portion 3 with the left hand and finally controls the bending portion 22 by controlling the corresponding parts on the operating portion 3 with the right hand, the sheath 32 is opened substantially downward with respect to the operator, and the instrument hole 307 is provided on the front side of the operating portion 3 with the opening directed obliquely upward; the knob port 301 is located on the right side; the auxiliary port 306 is provided on the rear side of the operation portion 3, and opens obliquely upward. The knob opening 301 is circular, and is provided with a circular ring, the circular ring is overlapped with the axis of the knob opening 301, and extends towards the inner side and the outer side of the shell 30 of the operation portion 3 to form a flange, the inwardly extending flange is defined as an inner flange 3011, and the outwardly extending flange is defined as an outer flange 3012. The operation section 3 can be used for holding when the operator operates the electronic endoscope provided by the present invention.

The operation section 3 includes an operation mechanism 31. The operating mechanism 31 further includes a control portion 311, a follower portion 312, a lock member 313, and a wire harness restricting member 314. Referring to fig. 12, in the present embodiment, the control portion 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 an end surface of the inward side of the knob 3111. The shaft 3112 is aligned with the axis of the knob 3111, and one end of the shaft 3112 is fixed to the knob 3111 and the other end is provided with teeth on the outer circumference, which are defined as a tooth end. As shown in fig. 9, two additional stoppers 3113 are provided on the outer side of the housing 30 corresponding to the stoppers 3113 provided on the inner end surface of the knob 3111.

Referring to fig. 13, the follower portion 312 includes a follower ring 3121, and the follower ring 3121 is approximately a hollow cylinder and is disposed in the housing 30. The outer periphery of one end of the follow-up ring 3121 close to the knob opening 301 is provided with outer teeth, which are defined as an outer tooth end 3122; the end distal from the knob opening 301 is provided with internal teeth on its inner circumference, defined as an internal teeth end 3123. The inner diameter of the outer 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 outer tooth end 3122 of the follower ring 3121 can be sleeved on the inner flange 3011 and can rotate. Three ring pieces 3124 protruding from the circumference in the radial direction are arranged on the follow-up ring 3121, and positioning holes 3125 are arranged on the ring pieces 3124. In the present embodiment, the positioning holes 3125 provided in the different ring pieces 3124 overlap each other in circumferential position, that is, the axes of the positioning holes 3125 provided in the different ring pieces 3124 coincide.

Locking member 313 includes locking mechanism 3131, petal block 3132, and locking block 3133. Referring to FIG. 10, locking mechanism 3131 further comprises ring 3134, handle 3135, and cross block 3136.

In this embodiment, the ring 3134, the handle 3135, and the cross block 3136 are fixedly connected to each other. As shown, the handle 3135 is disposed on one side of the ring 3134 and is substantially flush with the ring 3134, and the cross 3136 is disposed on the handle 3135 and extends toward the housing 30. Referring to fig. 9, the housing 30 is provided with a cross slot 302 corresponding to the cross block 3136, and 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. This embodiment provides a quick and secure attachment between cross 3136 and petal 3132 by providing a groove in the outward facing end of petal 3132 into which cross 3136 can engage. The rim of the ring 3134 is provided with a positioning block 3137, the positioning block 3137 extends inward (toward the housing 30) from the outer edge of the inner (toward the housing 30) end surface of the ring 3134, and forms a step 3138 protruding outward with respect to the axis of the ring 3134 at the end of the extension.

The above-described embodiment of the present invention provides the operating portion 3 of the electronic endoscope 1, wherein the cross block 3136 and the positioning block 3137 of the locking mechanism 3131 are located on the same side of the ring 3134.

The locking block 3133 is provided on an inner wall of the housing 30 and extends into the housing 30, and a side of the locking block 3133 facing the knob opening 301 is provided with a pointed protrusion 3139.

In addition, referring to fig. 9, the housing 30 is further provided with a slot 303, and a positioning block 3137 provided at an edge of the ring 3134 may be inserted into the slot 303, respectively, and the ring 3134 may be assembled to the housing 30 by engaging a step 3138 protruding from a terminal of the positioning block 3137 with an edge of the slot 303. Thus, locking mechanism 3131 may be assembled to housing 30 and may be rotated at an angle relative to housing 30, depending on the restriction of positioning block 3137 by slot 303, and the restriction of cross block 3136 by cross slot 302. In order to make the rotation of the ring 3134 smoother, in the present embodiment, the inner ring of the ring 3134 is sleeved on the outer flange 3012 of the knob opening 301. Otherwise rotation of ring 3134 would only rely on the cooperation of locating block 3137 and slot 303, and an undesirable deflection may occur to affect use.

The mutual position relation among the above-mentioned each parts is: the tooth end of the rotating shaft 3112 sequentially 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, is engaged with the inner tooth end 3123 of the follower ring 3121, and axially protrudes from the end surface of the inner tooth end 3123 of the follower ring 3121. At this time, due to the arrangement of the outer flange 3012, the stopper 3113 disposed on the inner end surface of the knob 3111 can rotate with the knob 3111 without touching the housing 30. When the knob 3111 is rotated, the stopper 3113 on the housing 30 controls the maximum rotation angle of the knob 3111 by limiting the moving range of the stopper 3113 on the inner end face of the knob 3111.

Thus, as will be understood by those skilled in the art, in the unlocked state, the operator rotates the knob 3111, the knob 3111 rotates the shaft 3112 fixedly connected thereto, and the shaft 3112 rotates the follower ring 3121 around the inner flange 3011.

When the operator wishes to lock, the operator moves the handle 3135, the handle 3135 rotates the ring 3134, the positioning block 3137, and the cross block 3136 rotate a certain angle along the outer flange 3012, the slot 303, and the cross slot 302, respectively, at this time, as shown in fig. 8b, the cross block 3136 moves the petal-shaped block 3132 in the housing 30 along the cross slot 302, the protruding portion of the petal-shaped block 3132 presses the locking block 3133, the locking block 3133 is elastically deformed, the pointed protrusion 3139 thereof engages or meshes with the outer tooth end 3122 of the follower ring 3121, and the follower ring 3121 cannot rotate, thereby achieving locking.

In other embodiments, the gear end of the shaft 3112 is provided with a pin hole 3114 radially penetrating the shaft 3112, and a pin 3115 penetrating the pin hole 3114 is provided to prevent the follower ring 3121 from axially separating from the shaft 3112.

In other embodiments, the locking member 313 further includes an annular groove 3130 for placing an elastic washer, which is placed in the annular groove 3130 and between the ring 3134 and the housing 30 in the state of the present invention where the transfer is completed. The elastic washer 3130 may reduce noise generated when the ring 3134 rotates with respect to the housing 30; and in the locked state, the contact between the ring 3134 and the housing 30 may be damped by increasing the friction force, and the connection is more stable.

Those skilled in the art will appreciate that the components of the present invention, designated as cross-shaped blocks, petal-shaped blocks, are described wherein the cross and petals are each named for ease of understanding their function and are not intended to limit their specific shape. The transmission effect that is desired to be achieved in the present application is within the scope of the present application. Continuing with fig. 7a, 7b, 8a, 8b, as previously noted, the present embodiment controls the bending of the bend 22 by tensioning and relaxing 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 bending portion 22, the proximal end of the wire harness 20 sequentially passes through the bending portion 22, the flexible tube portion 23, and the sheath 32 to enter the housing 30 of the operating portion 3, sequentially passes through the wire harness restricting member 314 in the housing 30 of the operating portion 3, passes through at least two positioning holes 3125 provided in the ring piece 3124 of the follower ring 3121, and is fixed to the finally passed positioning hole 3125 by welding or bonding. The applicant has found that positioning the proximal end of the wire harness 20 in such a manner that the proximal end passes through the positioning hole 3125 of one ring piece 3124 and finally passes through and is fixed to the positioning hole 3125 of the other ring piece 3124 can achieve both the effect of quick installation and the stable positioning of the proximal end of the wire harness 20 without affecting the operation of the operating mechanism 31. In particular, after the wire harness 20 is passed through at least two different positioning holes 3125, a thin rod may be passed through all the positioning holes, and glue may be applied to the positioning holes 3125 for further fastening. This allows for quick installation and also provides for secure positioning of the proximal end of the harness 20 without affecting the operation of the operating mechanism 31.

The above embodiment of the present invention provides the operating portion 3 of the electronic endoscope 1, wherein the proximal end of the wire harness 20 passes through the positioning hole 3125 of the intermediate ring piece 3124 of the follower ring 3121.

The above-described embodiment of the present invention provides the operation portion 3 of the electronic endoscope 1, wherein the follower ring is provided with a thin rod for inserting 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.

In the present embodiment, the wire harness restricting part 314 includes one main wire board 3141 and two branch wire boards 3142. The main string-passing board 3141 is disposed on the far side of the branch string-passing board 3142, and the branch string-passing board 3142 is disposed on the near side of the main string-passing board 3141. The middle of the main wire board 3141 is provided with two positioning holes 3125 for the two wire harnesses 20 to pass through respectively; the edge of the bus cable board 3141 is provided with a slot with a downward opening, and the slot can be inserted into the insertion plate 304 fixed on the inner wall of the shell 30, so that the position of the bus cable board 3141 relative to the shell 30 can be quickly fixed. The two wire distributing plates 3142 are respectively arranged in the two wire harness passageways 305, each wire distributing plate 3142 is provided with a positioning hole 3125, the inner wall of each wire harness passageway 305 is provided with an inserting groove 3143, and the wire distributing plates 3142 are fixed on the shell 30 by being inserted into the inserting grooves 3143 on the inner wall of the wire harness passageways 305. As can be understood by those skilled in the art, a higher installation efficiency can be achieved by inserting the wiring harness 20 through the positioning hole 3125, and then inserting and fixing the main wiring board 3141 and the branch wiring board 3142.

The above-described embodiment of the present invention provides the operation unit 3 of the electronic endoscope 1, wherein the housing 30 is provided with the wire harness passage 305. The harness passageway 305 has a trunk wire board 3141 and/or a branch wire board 3142 disposed therein. The main wire passing plate 3141 and/or the branch wire passing plate 3142 are/is provided with positioning holes 3125. Two positioning holes 3125 are disposed on the main wire board 3141.

In addition, as described above, in order to make it easier for the insertion portion 2 to pass through the corresponding channel of the mother endoscope, i.e., to improve the passability of the insertion portion 2 with respect to the corresponding channel of the mother endoscope as the use environment, it is also possible to provide the structure of the operation portion 3 so that the bending portion 22 and/or the flexible tube portion 23 are not improperly restrained by the wire harness 20 when being bent adaptively according to the structure of the corresponding channel of the mother endoscope. The applicant has found that in order to prevent the wire harness 20 from being excessively tightened to hinder the passability, the wire harness 20 needs to be first kept in a somewhat loose state. At this time, the wire harness 20 is disposed through the structure of the positioning hole 3125 of the trunk board 3141 and the branch board 3142, or the wire harness 20 is disposed through the structure of the positioning hole 3125 of the ring piece 3124, so that interference or confusion between the wire harnesses 20 and surrounding parts does not occur when the wire harness 20 is loosened. Thus, in operation, the wire harness 20 can be quickly brought into an operating state and function normally by turning the knob 3111.

The operation portion 3 of the electronic endoscope 1 according to the above embodiment of the present invention is configured such that the length of the wire harness 20 provided in the housing 30 is longer than the path of the wire harness 20 in the housing 30.

As described above, the housing 30 of the operation portion 3 is further provided with the auxiliary port 306 and the instrument port 307, and the insertion portion 2 extends proximally into the housing 30 of the operation portion 3 and protrudes from the proximal end surface of the sheath 32, as also described above. As can be seen from the foregoing, the flexible tube portion 23 of the insertion portion 2, which protrudes into the housing 30 beyond the proximal end face of the sheath 32, is provided with a working channel 224, a cable channel 223, a wire harness channel 226, and in other embodiments, an auxiliary channel 225.

Wherein, the instrument port 307 is provided with a luer connector 3071 which is communicated with the working channel 224 of the flexible tube part 23 through a stainless steel tube 3072. The auxiliary port 306 is provided with a sheath 3061, which communicates with the auxiliary passage 225 of the flexible tube portion 23 via a stainless tube 3062 (the communication state between the auxiliary port 306 and the stainless tube 3062 is not shown).

In other embodiments, the housing 30 of the operation portion 3 is further provided with an electronic control unit 33, and the keys 331 of the electronic control unit 33 protrude from the housing 30 through the key openings 308 on the housing 30 for the operator to use. An electronic output port 332 may be further provided on the housing 30 of the operation unit 3, and the electronic control unit 33, the imaging unit 212, the illumination unit 213, and the electronic output port 332 realize necessary power supply and data transmission via the cable 24.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.