Endoscope and medical device

Abstract

The utility model provides an endoscope and medical equipment. The endoscope comprises an insertion part and an operation part, the operation part is connected to the near end of the insertion part, the insertion part comprises a hard pipe section, a flexible pipe section, a bent pipe section and a head end part which are sequentially connected from near to far, the near end of the hard pipe section is connected to the operation part, and the outer diameter of the hard pipe section is larger than that of the flexible pipe section. When the endoscope participates in diagnosis and treatment, the hard tube section can be rotated or pushed and pulled to drive the flexible tube section, the bent tube section and the head end part to rotate or move. The hard pipe section is made of the hard material or at least partially made of the hard material, and the outer diameter of the hard pipe section is larger than that of the flexible pipe section, so that the hard pipe section has higher capability of driving the flexible pipe section, the bent pipe section and the head end part to rotate or move, and the force conductivity of the insertion part is better. In addition, the hard pipe section with a larger outer diameter can be conveniently held, so that an operator can conveniently use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to an endoscope and medical equipment. Background Art

[0002] As a non-invasive imaging method, endoscopic imaging can effectively extend human vision and is widely used in imaging diagnosis and image-guided treatment in many fields such as the digestive tract, cardiovascular and cerebrovascular system, urinary system, and respiratory system, greatly promoting the accuracy of disease examination.

[0003] The part of the endoscope that enters the human body is the insertion part. In order to facilitate entry into the human body, the insertion part is usually slender. When using an endoscope for diagnosis or treatment, it is necessary to rotate or push and pull the insertion part. However, when the working length of the endoscope is long, rotating or pushing and pulling the slender insertion part often has the problem of insufficient force conductivity. For example, when the endoscope is used for the diagnosis and treatment of the respiratory system, the part of the insertion part that extends into the human body from the nasopharynx is very long, and the slender insertion part will encounter greater resistance in the complex and tortuous internal channels of the human body. In addition, when the insertion part is operated in vitro, such as rotating or pushing and pulling the insertion part, the effect of rotating or moving the head end of the insertion part through force conduction is very poor. Therefore, an endoscope with better force conductivity is urgently needed. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, an endoscope is provided. The endoscope includes an insertion portion and an operating portion, the operating portion is connected to the proximal end of the insertion portion, the insertion portion includes a hard tube segment, a flexible tube segment, a curved tube segment and a head end portion connected in sequence from proximal to distal, the proximal end of the hard tube segment is connected to the operating portion, and the outer diameter of the hard tube segment is greater than the outer diameter of the flexible tube segment.

[0005] The endoscope provided by the utility model, when the endoscope participates in the process of diagnosis and treatment, for example, when the endoscope is used for ultrasonic bronchoscope to participate in the diagnosis and treatment, the part of the insertion part that extends into the human body is at least a part of the flexible tube segment, the curved tube segment and the head end; when the endoscope is used for other equipment to participate in the diagnosis and treatment, the part of the insertion part that extends into the human body can also be at least a part of the hard tube segment, the flexible tube segment, the curved tube segment and the head end. In the process of participating in the diagnosis and treatment, the endoscope can drive the rotation or movement of the flexible tube segment, the curved tube segment and the head end by rotating or pushing and pulling the hard tube segment. The hard tube segment is made of a hard material or at least partially made of a hard material, and the outer diameter of the hard tube segment is larger than the outer diameter of the flexible tube segment. Such a hard tube segment has a stronger ability to drive the flexible tube segment, the curved tube segment and the head end to rotate or move, which makes the force conductivity of the insertion part better. In addition, the hard tube segment with a larger outer diameter can be convenient to hold, which is further convenient for the operator to use.

[0006] Exemplarily, the hard pipe section has a first inner diameter, the flexible pipe section has a second inner diameter, and the first inner diameter is greater than the second inner diameter.

[0007] Exemplarily, the hard pipe section is connected to the flexible pipe section via a first transition joint.

[0008] Exemplarily, the first adapter joint has a joint channel, which is connected between the inner cavity of the hard pipe segment and the inner cavity of the flexible pipe segment, and the inner diameter of the joint channel gradually decreases from a first inner diameter to a second inner diameter along a direction toward the distal end.

[0009] Exemplarily, the first adapter joint includes a first connecting segment and a second connecting segment connected to each other, the distal end of the hard pipe segment is sleeved on the first connecting segment, and the second connecting segment is sleeved outside the proximal end of the flexible pipe segment.

[0010] Exemplarily, the wall thickness of the end of the distal end of the hard pipe segment is smaller than the wall thickness of other parts of the hard pipe segment, and the end of the distal end of the hard pipe segment is melt-welded to the first connecting segment.

[0011] Exemplarily, an instrument channel is provided in the insertion portion, the instrument channel comprising a first sub-instrument channel in the hard tube segment and a second sub-instrument channel in the flexible tube segment, and a cross-sectional area of ​​at least a portion of the first sub-instrument channel is greater than a cross-sectional area of ​​the second sub-instrument channel.

[0012] Exemplarily, the first instrument sub-channel and the second instrument sub-channel are connected via a second adapter connector.

[0013] Exemplarily, the second adapter joint is disposed within the hard pipe section.

[0014] Exemplarily, the second adapter joint includes a third connecting segment and a fourth connecting segment connected to each other, the distal end of the first sub-instrument channel is sleeved outside the third connecting segment, and the proximal end of the second sub-instrument channel is sleeved outside the fourth connecting segment.

[0015] Exemplarily, the second adapter joint further includes a fifth connecting segment, the fifth connecting segment is connected between the third connecting segment and the fourth connecting segment, and the fifth connecting segment has a gradually decreasing inner diameter along a direction from the third connecting segment to the fourth connecting segment.

[0016] Exemplarily, the cross section of the fifth connecting segment extending along its axis is arc-shaped, the radius of curvature of the arc is R, the inner diameter of the fourth connecting segment is D, and R / D≥0.15.

[0017] Exemplarily, the endoscope is an ultrasound endoscope.

[0018] According to another aspect of the present invention, a medical device is provided, which includes any endoscope as described above.

[0019] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0020] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

[0022] Figure 1 is a schematic diagram of an ultrasonic endoscope according to an exemplary embodiment of the present utility model;

[0023] Figure 2 is a schematic diagram of an insertion portion according to an exemplary embodiment of the utility model;

[0024] Figure 3 for Figure 2 A partial enlarged view of the insertion portion shown;

[0025] Figure 4 for Figure 3 A partial cross-sectional view of the insert portion shown;

[0026] Figure 5A is a cross-sectional view of a cross section of a flexible pipe section according to an exemplary embodiment of the present utility model;

[0027] Figure 5B is a cross-sectional view of a cross section of a hard pipe segment according to an exemplary embodiment of the present utility model;

[0028] Figure 6 A partial cross-sectional view of a location where a hard pipe section transitions to a flexible pipe section on an insertion portion according to an exemplary embodiment of the present invention; and

[0029] Figure 7 It is a partial cross-sectional view of the transition from the first sub-instrument channel to the second sub-instrument channel in the insertion part according to an exemplary embodiment of the present utility model.

[0030] The above drawings include the following reference numerals:

[0031] 10. Ultrasonic endoscope; 11. Ultrasonic connector; 20. Endoscope; 21. Insertion portion; 210. Hard tube segment; 220. Flexible tube segment; 230. Bent tube segment; 240. Head end portion; 250. First adapter joint; 251. Joint channel; 252. First connecting segment; 253. Second connecting segment; 260. Instrument channel; 261. First sub-instrument channel; 262. Second sub-instrument channel; 263. Second adapter joint; 2631. Third connecting segment; 2632. Fourth connecting segment; 2633. Fifth connecting segment; 22. Operation portion; 23. Light guide portion. DETAILED DESCRIPTION

[0032] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

[0033] See also Figure 1 According to one aspect of the present invention, an endoscope 20 is provided. The endoscope 20 can be applied to any suitable occasion, including but not limited to medical equipment. Therefore, according to another aspect of the present invention, a medical equipment is provided. The medical equipment can include any endoscope to be introduced below.

[0034] The endoscope 20 may be an ultrasonic endoscope 10 or an optical endoscope. The ultrasonic endoscope 10 may be an ultrasonic bronchoscope system, an intracardiac ultrasonic system, an intravascular ultrasonic system, or the like, which is an ultrasonic endoscope 10 capable of controlling the transmission and reception of ultrasonic signals and having an ultrasonic image processing function. The ultrasonic endoscope 10 may include an ultrasonic connector 11, and the endoscope 20 may include an insertion portion 21, an operating portion 22, and a light guide portion 23, wherein the light guide portion 23 may be connected to the proximal end of the operating portion 22, and the operating portion 22 may be connected to the proximal end of the insertion portion 21. The light guide portion 23 may be connected to the ultrasonic connector 11.

[0035] See also Figure 2 , Figure 3 and Figure 4The insertion portion 21 may include a hard tube segment 210, a flexible tube segment 220, a curved tube segment 230 and a head end portion 240 connected in sequence from proximal to distal. The hard tube segment 210 may be made of a hard material, or at least the outermost layer may be made of a hard material and have a hard outer shell. For example, the hard tube segment 210 may be made of stainless steel, or the hard tube segment 210 may have an outer shell made of stainless steel. The flexible tube segment 220 may be elastically deformable as a whole, and the flexible tube segment 220 may be made of a flexible material. The length of the flexible tube segment 220 should be able to meet the needs of clinical diagnosis and treatment. For example, when the endoscope 20 is used for an ultrasonic bronchoscope, the length of the flexible tube segment 220 should be able to meet the needs of clinical diagnosis and treatment in the nasopharyngeal region. The proximal end of the hard tube segment 210 may be connected to the operating portion 22. When the endoscope 20 is in use, the flexible tube section 220, the curved tube section 230 and the head end 240 in the insertion portion 21 can be extended into the human body, and the hard tube section 210 can be kept outside the human body. By rotating or pushing and pulling the hard tube section 210, the flexible tube section 220, the curved tube section 230 and the head end 240 in the human body can be driven to rotate or move, so that the head end 240 can pass through the curved and complex channels in the human body to reach a predetermined position and be at a predetermined angle. On this basis, the operator can use the endoscope 20 to assist in diagnosis and treatment. Figure 5A and Figure 5B Generally, various channels may be provided in the insertion part 21, and various built-in objects such as optical fibers, optical signal lines, ultrasonic signal lines, clamp tubes or water bag tubes may pass through these channels to realize the function of the scope. For example, an instrument channel and a water bag channel may be provided in the insertion part 21, and the instrument channel and the water bag channel may pass through the insertion part 21 and be connected to the operation part 22. By performing corresponding operations at the operation part 22, the medical device may be controlled to pass through the instrument channel to reach a predetermined position in the human body for diagnosis and treatment, and the water bag tube may be controlled to pass through the water bag channel to clean the predetermined position in the human body.

[0036] The outer diameter of the hard tube section 210 can be larger than the outer diameter of the flexible tube section 220. Since the hard tube section 210 is generally not inserted into the human body during the diagnosis and treatment process of the endoscope 20, and the hard tube section 210 can be controlled to rotate or move, thereby driving the flexible tube section 220, the curved tube section 230 and the head end 240 to rotate or move, the outer diameter of the hard tube section 210 is larger than the outer diameter of the flexible tube section 220, which can be convenient to hold on the one hand, and on the other hand, the overall thicker hard tube section 210 can make the force on the insertion part 21 more conductive, that is, for the hard tube section 210 with a larger outer diameter, the ability to drive the flexible tube section 220, the curved tube section 230 and the head end 240 to rotate or move is stronger.

[0037] The endoscope 20 provided by the utility model, when the endoscope 20 participates in the process of diagnosis and treatment, for example, when the endoscope 20 is used for ultrasound bronchoscope to participate in the diagnosis and treatment, the part of the insertion part 21 extending into the human body is at least a part of the flexible tube segment 220, the curved tube segment 230 and the head end 240; when the endoscope 20 is used for other equipment to participate in the diagnosis and treatment, the part of the insertion part 21 extending into the human body can also be at least a part of the hard tube segment 210, the flexible tube segment 220, the curved tube segment 230 and the head end 240. In the process of diagnosis and treatment, the endoscope 20 can drive the rotation or movement of the flexible tube segment 220, the curved tube segment 230 and the head end 240 by rotating or pushing and pulling the hard tube segment 210. The hard pipe section 210 is made of a hard material or at least partially made of a hard material, and the outer diameter of the hard pipe section 210 is larger than the outer diameter of the flexible pipe section 220. Such a hard pipe section 210 has a stronger ability to drive the flexible pipe section 220, the curved pipe section 230 and the head end 240 to rotate or move, which makes the force conductivity of the insertion part 21 better. In addition, the hard pipe section 210 with a larger outer diameter can be easily held, which is further convenient for the operator to use.

[0038] In one embodiment of the present invention, the hard tube segment 210 may have a first inner diameter, and the flexible tube segment 220 may have a second inner diameter, and the first inner diameter may be greater than the second inner diameter. The channel in the hard tube segment 210 with a larger inner diameter may be designed as a channel with a larger inner diameter. As described above, various channels may be generally provided in the insertion portion 21, and these channels penetrate the insertion portion 21 and are connected to the operating portion 22 at the proximal end. When various medical devices such as puncture needles or water bag tubes need to be inserted into these channels, they may be inserted into these channels at the connection between the operating portion 22 and the insertion portion 21. The connection between the operating portion 22 and the insertion portion 21 is actually the connection between the operating portion 22 and the hard tube segment 210. Therefore, when the hard tube segment 210 has a larger inner diameter, the portion of various channels in the insertion portion 21 located in the hard tube segment 210 may have a larger channel inner diameter, which makes it more convenient for various medical devices to be inserted into the operating portion 22 and into various channels in the hard tube segment 210.

[0039] In one embodiment of the present invention, see Figure 6, the hard pipe section 210 can be connected to the flexible pipe section 220 through the first adapter joint 250. The hard pipe section 210 and the flexible pipe section 220 can be connected to the first adapter joint 250 by various forms such as welding, clamping or threaded connection, and the connection forms of the hard pipe section 210 and the flexible pipe section 220 with the first adapter joint 250 can be the same or different. It is also possible that either or both of the hard pipe section 210 and the flexible pipe section 220 are formed as an integral part with the first adapter joint 250. Since the connection is more susceptible to damage, if the hard pipe section 210 is directly connected to the flexible pipe section 220, when the connection is damaged, it may be necessary to replace or repair the entire pipe section of the hard pipe section 210 or the flexible pipe section 220, which is very troublesome and more expensive. The hard tube section 210 is connected to the flexible tube section 220 via the first adapter joint 250. When the first adapter joint 250 is damaged and needs to be replaced or repaired, only the first adapter joint 250 needs to be replaced or repaired, which makes the disassembly, repair and replacement of the endoscope 20 easier.

[0040] Exemplarily, the first adapter joint 250 may have a joint channel 251, and the joint channel 251 may be connected between the inner cavity of the hard tube segment 210 and the inner cavity of the flexible tube segment 220. The joint channel 251 may include at least a portion having an inner diameter that is the same as the first inner diameter of the hard tube segment 210, and at least a portion having an inner diameter that is the same as the second inner diameter of the flexible tube segment 220. Along the direction toward the distal end, the inner diameter of the joint channel 251 may be gradually reduced from the first inner diameter to the second inner diameter, or may have a sudden change section, that is, the cross-sectional edge of the joint channel 251 along its axis may be a straight line or an arc line, or may include a step line. Preferably, the inner diameter of the joint channel 251 may be gradually reduced from the first inner diameter to the second inner diameter along the direction toward the distal end. Figure 6 In the illustrated embodiment, the inner diameter of the joint channel 251 gradually decreases from the first inner diameter to the second inner diameter in the direction toward the distal end. The inner diameter of the joint channel 251 gradually decreases toward the distal end, so that the instrument located in the hard pipe segment 210 can move toward the flexible pipe segment 220 more smoothly without encountering obstacles such as step surfaces. The first adapter joint 250 with the joint channel 251 can facilitate the internal channel of the hard pipe segment 210 to communicate with the internal channel of the flexible pipe segment 220, and the structure of such a first adapter joint 250 is simpler.

[0041] Since the first inner diameter of the hard pipe segment 210 can be greater than the second inner diameter of the flexible pipe segment 220, and the outer diameter of the hard pipe segment 210 can be greater than the outer diameter of the flexible pipe segment 220, preferably, the first inner diameter of the hard pipe segment 210 can be greater than the outer diameter of the flexible pipe segment 220. Exemplarily, the first adapter joint 250 can include a first connecting segment 252 and a second connecting segment 253 connected to each other, the distal end of the hard pipe segment 210 can be sleeved on the outside of the first connecting segment 252, and the second connecting segment 253 can be sleeved on the outside of the proximal end of the flexible pipe segment 220. The distal end of the hard pipe segment 210 can be sleeved on the first connecting segment 252 by welding, clamping, interference fit, gluing or threading; the second connecting segment 253 can be sleeved on the proximal end of the flexible pipe segment 220 by welding, clamping, interference fit, gluing or threading. The distal end of the hard tube section 210 can be sleeved on the first connecting section 252. The hard tube section 210, which is at least partially made of hard material, can protect the first connecting section 252 and prevent the first connecting section 252 from being damaged by external factors. The outer diameter of the flexible tube section 220 is relatively small, and a complex channel is arranged inside, and the internal space is relatively tight. The second connecting section 253 can be sleeved on the proximal end of the flexible tube section 220. The second connecting section 253 is connected to the flexible tube section 220 outside the flexible tube section 220 to prevent the second connecting section 253 from occupying the internal space of the flexible tube section 220. In such an endoscope 20, the hard tube section 210 is connected to the flexible tube section 220 through the first adapter 250, which is more stable.

[0042] For example, the wall thickness of the end of the distal end of the hard pipe segment 210 can be less than the wall thickness of other parts of the hard pipe segment 210, and the end of the distal end of the hard pipe segment 210 can be melt-welded to the first connecting segment 252. The end of the distal end of the hard pipe segment 210 can be melt-welded to the first connecting segment 252 in various forms such as laser welding or hot melt welding. The wall thickness of the end of the distal end of the hard pipe segment 210 is small, so the end of the distal end of the hard pipe segment 210 can be used as a solder to fill the gap to achieve sealing and fixing, so that the stability and sealing of the hard pipe segment 210 welded to the first connecting segment 252 are better, and the production and processing are more convenient.

[0043] In one embodiment of the present invention, see Figure 3 , Figure 4 , Figure 5A , Figure 5B and Figure 7, an instrument channel 260 may be provided in the insertion portion 21, and the outlet of the instrument channel 260 may be located on the curved tube segment 230 or the head end portion 240. The instrument channel 260 may include a first sub-instrument channel 261 located in the hard tube segment 210 and a second sub-instrument channel 262 located in the flexible tube segment 220, and the cross-sectional area of ​​at least a portion of the first sub-instrument channel 261 may be greater than the cross-sectional area of ​​the second sub-instrument channel 262. Since the outer diameter of the hard tube segment 210 is greater than the outer diameter of the flexible tube segment 220, and the first inner diameter of the hard tube segment 210 is greater than the second inner diameter of the flexible tube segment 220, the cross-sectional area of ​​the first sub-instrument channel 261 in the hard tube segment 210 may be greater than the cross-sectional area of ​​the second sub-instrument channel 262. During the use of the endoscope 20, it is often necessary to attract and remove liquid that affects observation through the outlet of the instrument channel 260. The cross-sectional area of ​​at least a portion of the first sub-instrument channel 261 is greater than the cross-sectional area of ​​the second sub-instrument channel 262. Such a first sub-instrument channel 261 has a larger cross-sectional area, which means that the resistance to the flow of liquid is smaller. When the instrument channel 260 is used to attract the liquid that affects the observation inside the human body by using, for example, a suction pump, and the suction pump consumes the same energy, such a first sub-instrument channel 261 can make the instrument channel 260 more efficient in attracting the liquid, thereby making the instrument channel 260 more attractive to the liquid that affects the observation inside the human body. In particular, when the endoscope 20 is applied to an ultrasonic bronchoscope, since an ultrasonic bronchoscope usually uses a puncture needle to pass through the instrument channel 260, in order to match the use of the puncture needle, the central axis of the outlet of the instrument channel 260 will be at a certain angle to the central axis of the second sub-instrument channel 262, so that the opening aperture of the outlet of the instrument channel 260 will be larger than the inner diameter of the second sub-instrument channel 262. Such an outlet of the instrument channel 260 has a poor attraction to the liquid that affects the observation inside the human body. On this basis, the cross-sectional area of ​​the first sub-instrument channel 261 can be larger than the cross-sectional area of ​​the second sub-instrument channel 262, which can not only overcome this shortcoming, but also when such an endoscope 20 is used in an ultrasonic bronchoscope, the instrument channel 260 has a stronger attraction for liquids that affect observation than a conventional ultrasonic bronchoscope.

[0044] Exemplarily, the first sub-instrument channel 261 and the second sub-instrument channel 262 may be connected via a second adapter connector 263. The first sub-instrument channel 261 and the second sub-instrument channel 262 may be connected to the second adapter connector 263 by various forms such as welding, clamping or threaded connection, respectively. The connection forms of the first sub-instrument channel 261 and the second sub-instrument channel 262 and the second adapter connector 263 may be the same or different. Alternatively, either or both of the first sub-instrument channel 261 and the second sub-instrument channel 262 may be formed integrally with the second adapter connector 263. The second adapter connector 263 may be made of any material, preferably, the second adapter connector 263 may be made of stainless steel. Since the connection is more susceptible to damage, if the first sub-instrument channel 261 is directly connected to the second sub-instrument channel 262, when the connection is damaged, it may be necessary to replace or repair the entire first sub-instrument channel 261 or the second sub-instrument channel 262, which is very troublesome and more expensive. The first sub-instrument channel 261 is connected to the second sub-instrument channel 262 via the second adapter connector 263. When the second adapter connector 263 is damaged and needs to be replaced or repaired, only the second adapter connector 263 needs to be replaced or repaired, which makes the disassembly, repair and replacement of the endoscope 20 easier.

[0045] Exemplarily, the second adapter joint 263 may be disposed in the hard pipe segment 210. The internal space of the flexible pipe segment 220 is more limited, so the second adapter joint 263 may not occupy the internal space of the flexible pipe segment 220. Moreover, the second adapter joint 263 is disposed in the hard pipe segment 210, and the connection between the first sub-instrument channel 261 and the second sub-instrument channel 262 is actually located in the hard pipe segment 210. The hard pipe segment 210 has a larger outer diameter and a larger first inner diameter, so the connection is located in the hard pipe segment 210, which can be easily replaced and repaired.

[0046] Exemplarily, the second adapter joint 263 may include a third connecting segment 2631 and a fourth connecting segment 2632 connected to each other, the distal end of the first sub-instrument channel 261 may be sleeved on the outside of the third connecting segment 2631, and the proximal end of the second sub-instrument channel 262 may be sleeved on the outside of the fourth connecting segment 2632. The distal end of the first sub-instrument channel 261 may be sleeved on the third connecting segment 2631 by welding, clamping, gluing or threading; the proximal end of the second sub-instrument channel 262 may be sleeved on the fourth connecting segment 2632 by welding, clamping, gluing or threading. The second adapter joint 263 does not have a portion located outside the first sub-instrument channel 261 and the second sub-instrument channel 262, and may not occupy the internal space of the hard pipe segment 210 and the flexible pipe segment 220, so that the structure of the overall device can be more compact.

[0047] Exemplarily, the second adapter joint 263 may further include a fifth connection segment 2633, which may be connected between the third connection segment 2631 and the fourth connection segment 2632, and the fifth connection segment 2633 may have a gradually decreasing inner diameter along the direction from the third connection segment 2631 to the fourth connection segment 2632. The cross section of the fifth connection segment 2633 extending along its axis may have a straight edge line or an arc edge line. When the instrument channel 260 attracts the liquid in the human body that affects observation, liquid may flow in the instrument channel 260. Such a second adapter joint 263 may avoid the generation of eddies at the place where the boundary conditions suddenly change when the liquid flows, and has less resistance to the flow of the liquid.

[0048] Preferably, the cross section of the fifth connecting section 2633 extending along its axis may be arc-shaped, the radius of curvature of the arc is R, the inner diameter of the fourth connecting section 2632 is D, and R / D≥0.15. Such a second adapter joint 263 can further reduce the resistance to liquid flow.

[0049] As mentioned above, the endoscope 20 can be an ultrasonic endoscope 10, for example, the endoscope 20 can be applied to an ultrasonic bronchoscope. Since the ultrasonic bronchoscope needs to pass through a long channel in the nasopharyngeal region, the force conductivity of the endoscope 20 is required to be better. The hard tube segment 210 has a stronger ability to drive the flexible tube segment 220, the curved tube segment 230 and the head end 240 to rotate or move, which makes the force conductivity of the insertion portion 21 better. Such an endoscope 20 has good force conductivity and is effective when applied to an ultrasonic endoscope, especially an ultrasonic bronchoscope.

[0050] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0054] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An endoscope, comprising an insertion portion and an operating portion, wherein the operating portion is connected to the proximal end of the insertion portion, characterized in that: The insertion part includes a hard pipe section, a flexible pipe section, a curved pipe section and a head end connected in sequence from proximal to distal, the proximal end of the hard pipe section is connected to the operating part, and the outer diameter of the hard pipe section is greater than the outer diameter of the flexible pipe section.

2. The endoscope according to claim 1, characterized in that The rigid pipe section has a first inner diameter, and the flexible pipe section has a second inner diameter, wherein the first inner diameter is greater than the second inner diameter.

3. The endoscope according to claim 2, characterized in that The hard pipe section is connected to the flexible pipe section via a first adapter joint.

4. The endoscope according to claim 3, characterized in that The first adapter joint has a joint channel, which is connected between the inner cavity of the hard pipe section and the inner cavity of the flexible pipe section. The inner diameter of the joint channel gradually decreases from the first inner diameter to the second inner diameter along the direction toward the distal end.

5. The endoscope according to claim 3, characterized in that The first adapter joint includes a first connecting section and a second connecting section connected to each other, the distal end of the hard pipe section is sleeved outside the first connecting section, and the second connecting section is sleeved outside the proximal end of the flexible pipe section.

6. The endoscope according to claim 5, characterized in that The wall thickness of the end of the distal end of the hard pipe segment is smaller than the wall thickness of other parts of the hard pipe segment, and the end of the distal end of the hard pipe segment is melt-welded to the first connecting segment.

7. The endoscope according to claim 2, characterized in that: An instrument channel is provided in the insertion portion, and the instrument channel includes a first sub-instrument channel located in the hard tube segment and a second sub-instrument channel located in the flexible tube segment, and a cross-sectional area of ​​at least a portion of the first sub-instrument channel is larger than a cross-sectional area of ​​the second sub-instrument channel.

8. The endoscope according to claim 7, characterized in that The first sub-instrument channel and the second sub-instrument channel are connected via a second adapter connector.

9. The endoscope according to claim 8, characterized in that The second adapter joint is arranged in the hard pipe section.

10. The endoscope according to claim 8, characterized in that The second adapter joint includes a third connecting section and a fourth connecting section connected to each other, the distal end of the first sub-instrument channel is sleeved outside the third connecting section, and the proximal end of the second sub-instrument channel is sleeved outside the fourth connecting section.

11. The endoscope according to claim 10, characterized in that: The second adapter joint further includes a fifth connecting segment, which is connected between the third connecting segment and the fourth connecting segment, and has an inner diameter that gradually decreases along a direction from the third connecting segment to the fourth connecting segment.

12. The endoscope according to claim 11, characterized in that The cross section of the fifth connecting section extending along its axis is arc-shaped, the curvature radius of the arc is R, the inner diameter of the fourth connecting section is D, and R / D≥0.

15.

13. The endoscope according to claim 1, characterized in that The endoscope is an ultrasonic endoscope.

14. A medical device, characterized in that: Comprising an endoscope as described in any one of claims 1-13.

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