Head end part of endoscope and endoscope

Abstract

The embodiment of the utility model provides a head end part of an endoscope and the endoscope, the head end part is provided with an end face facing the far end and a side face extending from the edge of the end face to the near end, the head end part comprises a first ultrasonic assembly, the first ultrasonic assembly is provided with a first acoustic window, the first acoustic window is arranged on the end face, and the surface of the first acoustic window is flush with the end face; the instrument channel opening is formed in the end face; the second ultrasonic assembly is provided with a second acoustic window, the second acoustic window is arranged on the side face of the end portion, and the instrument channel opening is located between the first acoustic window and the second acoustic window. According to the technical scheme, an operator can switch between the first ultrasonic visual angle of the end face and the second ultrasonic visual angle of the side face, and therefore different inspection requirements are met. When a treatment instrument extends out of the instrument channel opening, the second ultrasonic visual angle can guide the treatment instrument more accurately, and therefore operation such as ultrasonic guided puncture is completed.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a head end of a laparoscope and a laparoscope using the head end. Background Technology

[0002] With the development of medical technology, minimally invasive surgery has been widely used due to its lower physical burden. Ultrasound detection, which can detect and guide lesions within tissues as well as tiny lesions that are difficult to see with the naked eye, is also gradually being applied to minimally invasive surgery.

[0003] Currently, some endoscopes equipped with ultrasound detection capabilities include an instrument channel opening and an ultrasound window located on the end face. During ultrasound detection and treatment, instruments can be extended from the instrument channel opening to perform procedures such as puncture, ablation, or retrieval under ultrasound guidance. However, the existing ultrasound window located on the end face provides poor guidance for the instruments. Utility Model Content

[0004] To at least partially address the problems existing in the prior art, some embodiments of this application provide a head end of a laparoscope, the head end comprising: a first ultrasonic component having a first acoustic window disposed on an end face; an instrument channel opening disposed on the end face; and a second ultrasonic component having a second acoustic window disposed on a side of the end, and the instrument channel opening being located between the first and second acoustic windows.

[0005] For example, the side includes a first sub-side and a second sub-side disposed opposite to each other along a first lateral direction, the first lateral direction being perpendicular to the axis of the head end, the second acoustic window of the second ultrasound component being disposed on the first sub-side, and the instrument channel opening being offset toward the first sub-side relative to the center of the end face along the first lateral direction.

[0006] For example, the end face includes a first sub-end face and a second sub-end face that are adjacent to each other in a first lateral direction. The first sub-side face is adjacent to the first sub-end face, and the second sub-side face is adjacent to the second sub-end face. The instrument channel opening is disposed on the first sub-end face, wherein: along the direction from the first sub-end face to the second sub-side face, the second sub-end face is inclined toward the proximal end of the head end; and the head end also includes an optical component, the observation window of which is disposed on the second sub-end face.

[0007] For example, the first acoustic window of the first ultrasonic component has a shape that extends along a second lateral direction perpendicular to the first lateral direction, and the first acoustic window of the first ultrasonic component is disposed on the first sub-end face.

[0008] For example, the head end also includes a plurality of illumination windows, which are respectively disposed on opposite sides of the first ultrasound component along a first lateral direction.

[0009] For example, the side includes a first sub-side and a second sub-side disposed opposite to each other along a first lateral direction, the first lateral direction being perpendicular to the axis of the head end, and a second acoustic window of the second ultrasonic component is disposed on the first sub-side, wherein: the first acoustic window of the first ultrasonic component has a shape extending along a second lateral direction perpendicular to the first lateral direction, and the second acoustic window of the second ultrasonic component has a shape extending along the axis.

[0010] For example, the length of the second ultrasound component is greater than the length of the first ultrasound component.

[0011] For example, an instrument channel is provided within the head end, the instrument channel including a first channel segment located in the proximal end of the head end and a second channel segment located in the distal end of the head end, wherein: the first channel segment is closer to the axis of the head end than the second ultrasound component, and the distance from the opening of the instrument channel to the axis is greater than the distance from the first channel segment to the axis; the second channel segment connects the first channel segment and the opening of the instrument channel, and the extension direction of the second channel segment forms an angle with the axis.

[0012] This application also includes a laparoscope, including an insertion portion, the insertion portion including a curved portion and the aforementioned head end, the head end being connected to the distal end of the curved portion.

[0013] For example, the endoscope also includes an operating section connected to the proximal end of the insertion section, wherein the operating section is provided with an operating button.

[0014] For example, the surface of the operating part is provided with an instrument channel inlet, and the insertion part is also provided with an instrument channel, the instrument channel inlet being connected to the instrument channel outlet on the head end via the instrument channel.

[0015] For example, the insertion part includes a rigid tube connected between the operating part and the bending part.

[0016] For example, the operating part is provided with a knob and a latch, the knob is used to control the bending of the bending part, and the latch is used to lock the knob.

[0017] In the above technical solution, the operator can switch between a first ultrasound viewpoint on the end face and a second ultrasound viewpoint on the side to meet different examination needs. When the instrument is extended through the instrument channel opening, the second ultrasound viewpoint can provide more precise guidance for the instrument, thereby completing procedures such as ultrasound-guided puncture.

[0018] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution. Attached Figure Description

[0019] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0020] Figure 1 A perspective view of a laparoscope according to an exemplary embodiment of this application;

[0021] Figure 2A According to Figure 1 A perspective view of the insertion section in the illustrated embodiment;

[0022] Figure 2B According to Figure 1 A perspective view of the head end of the illustrated embodiment;

[0023] Figure 3 According to Figure 1 Side view of the head end of the embodiment shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Insertion section; 20. Operating section; 21. Instrument channel entrance; 30. Ultrasonic connector; 40. Light guide section; 100. Head end; 110. First acoustic window; 120. End face; 121. Observation window; 122. Illumination window; 123. First sub-end face; 124. Second sub-end face; 130. Instrument channel opening; 140. First sub-side face; 150. Second acoustic window; 161. First channel section; 162. Second channel section; 200. Bending section; 300. Rigid tube. Detailed Implementation

[0026] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application by way of example only. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.

[0027] This application provides a laparoscope for minimally invasive surgery. For example... Figure 1As shown, the laparoscope may include a tip 100 located at the distal end of the laparoscope. Here, "proximal" refers to the end closer to the operator, and "distal" refers to the end farther from the operator. The tip 100 can be inserted into the patient's body through a trocar (a surgical instrument insertion channel left on the body surface). Figure 2A and Figure 2B As shown, the tip 100 of the endoscope has a distal end face 120 and a side face extending proximally from the edge of the end face 120. In the embodiment shown, the tip 100 can be generally constructed as a cylindrical structure. In embodiments not shown, the tip 100 can also be constructed as a prismatic structure. Taking a cylindrical tip 100 as an example, the tip 100 may include a first ultrasound component having a first acoustic window 110 disposed on the end face 120. During the procedure, the operator can directly place the end face 120 of the tip 100 against the area to be examined and acquire an image of the area using ultrasound. The first ultrasound component can employ a linear array transducer, thereby enabling precise imaging within the scanning area, suitable for examining small lesions. For ease of understanding, the imaging area of ​​the first ultrasound component is referred to as the first ultrasound viewing angle. In embodiments not shown, the first ultrasound component can employ a convex array transducer.

[0028] The tip 100 may also include an instrument channel opening 130, which may be located on the end face 120. The operator can insert a treatment instrument into the interior of the endoscope from the proximal end. The treatment instrument can reach the target location through the instrument channel opening 130 of the tip 100 to perform operations such as puncture, ablation, and sampling. The diameter of the instrument channel is typically not less than 2.8 mm, thus allowing conventional treatment instruments to pass through.

[0029] Both the first acoustic window 110 and the instrument channel opening 130 are located on the end face 120. The scanning angle of the first ultrasound component and the extension angle of the treatment instrument are relatively close, making it difficult to distinguish the treatment instrument in the field of view of the first ultrasound component (it may appear as a small dot or a short line). Therefore, a second ultrasound component can also be provided at the head end 100. The second ultrasound component has a second acoustic window 150, which is located on the side of the end, and the instrument channel opening 130 is located between the first acoustic window 110 and the second acoustic window 150. When the treatment instrument extends from the instrument channel opening 130, it can bend towards the second acoustic window 150, thereby entering the scanning range of the second acoustic window 150. For ease of understanding, the imaging area of ​​the second ultrasound component is referred to as the second ultrasound field of view.

[0030] The scanning angle of the second ultrasound component can be no less than 150 degrees, thus providing a sufficiently large scanning range to guide the treatment device. Exemplarily, the second ultrasound component can employ a convex array transducer. Alternatively, the second ultrasound component can employ a linear array transducer with scalable imaging, adjusting the phase of the ultrasonic waves generated by each wafer within the transducer to create a fan-shaped scanning area. This not only allows for ultrasonic guidance of the treatment device during extension but also enables switching between large-area coarse examinations and small-area fine examinations during normal ultrasound scanning.

[0031] In the above technical solution, the operator can switch between a first ultrasound viewpoint at the end face 120 and a second ultrasound viewpoint at the side to meet different examination needs. When the treatment instrument is extended through the instrument channel opening 130, the second ultrasound viewpoint can provide more precise guidance for the treatment instrument, thereby completing procedures such as ultrasound-guided puncture.

[0032] Exemplarily, the side includes a first sub-side surface 140 and a second sub-side surface disposed opposite each other along a first lateral direction, the first lateral direction being perpendicular to the axis of the head end portion 100. The second acoustic window 150 of the second ultrasound assembly is disposed on the first sub-side surface 140, and the instrument channel opening 130 is offset relative to the center of the end face 120 toward the first sub-side surface 140 along the first lateral direction. As described above, the instrument channel extending through the instrument channel opening 130 needs to complete the operation under the ultrasonic guidance of the second ultrasound assembly. By positioning the instrument channel opening 130 close to the second ultrasound assembly, the second ultrasound assembly can guide the instrument without requiring a large scanning angle, thereby reducing the design complexity of the second ultrasound assembly and lowering costs.

[0033] Exemplarily, end face 120 includes a first sub-end face 123 and a second sub-end face 124 adjacent along a first lateral direction. A first sub-side face 140 is adjacent to the first sub-end face 123, and a second sub-side face is adjacent to the second sub-end face 124. An instrument channel opening 130 is disposed on the first sub-end face 123. Specifically, the second sub-end face 124 is inclined towards the proximal end of the head end portion 100 along the direction from the first sub-end face 123 to the second sub-side face. The head end portion 100 also includes an optical component, and an observation window 121 of the optical component is disposed on the second sub-end face 124. The optical component may include, for example, an optical imaging element such as a visible light camera or an infrared camera. In some embodiments, because the first sub-end face 123 is provided with the first ultrasound component and the instrument channel opening 130, while the second sub-end face 124 is only provided with the observation window 121 of the optical component, the area of ​​the first sub-end face 123 can be larger than the area of ​​the second sub-end face 124. In other embodiments, because the second sub-end face 124 is inclined, it may have the same area as the first sub-end face 123, or a larger area than the first sub-end face 123. An illumination window 122 may also be provided around the observation window 121. (Refer to reference...) Figure 2A , Figure 2B and Figure 3 In one embodiment, the first sub-end face 123 is perpendicular to the axial direction, and the angle θ between the first sub-end face 123 and the second sub-end face 124 can be between 0 and 30 degrees. In some embodiments, the optical components can rotate between 0 and 30 degrees to provide diverse fields of view. In another embodiment, the first sub-end face 123 can have an angle with a plane perpendicular to the axial direction, and the second sub-end face 124 can also have an angle with a plane perpendicular to the axial direction, both angles being between 0 and 30 degrees, and the magnitudes of these two angles can be different. During the examination, the first sub-end face 123, which is near the distal end, may come into contact with, for example, the abdominal wall, thoracic wall, or the surface of an organ. In this case, the observation window 121 provided on the second sub-end face 124 usually has sufficient clearance from its surroundings and will not be completely blocked by the cavity wall or organ. This prevents the surface of the observation window 121 from becoming contaminated and also avoids the observation window 121 from pressing against the cavity wall or organ surface during surgery, resulting in a completely black or red field of view, and makes it less likely for the operator to lose their sense of direction during the operation. Through the optical components, the operator can adjust the head tip 100 to a suitable angle and position, and extend treatment instruments, such as soft radiofrequency needles, soft ablation needles, grasping forceps, etc., through the instrument channel opening 130 to remove, ablate, or stop bleeding at the lesion site under the guidance of optical images.

[0034] Both the first acoustic window 110 and the instrument channel opening 130 are located on the end face 120. Since the crystal array of the first ultrasonic component is rectangular, the first ultrasonic component composed of multiple crystal arrays arranged linearly is also typically constructed in a rectangular shape to ensure acoustic performance and control design costs. To increase the area of ​​the first acoustic window 110, for example, the first acoustic window 110 of the first ultrasonic component has a shape that extends along a second lateral direction perpendicular to the first lateral direction, and the first acoustic window 110 of the first ultrasonic component is located on the first sub-end face 123. This ensures the scanning range of the first ultrasonic component, and also leaves space next to the first acoustic window 110 for the instrument channel opening 130.

[0035] Exemplarily, the head end portion 100 may also include a plurality of illumination windows 122. The plurality of illumination windows 122 are respectively disposed on opposite sides of the first ultrasound assembly along a first lateral direction. Taking the head end portion 100 shown in the figure as an example, the head end portion 100 includes two illumination windows 122, one of which is disposed next to the observation window 121 and is located on the second sub-end face, emitting light that can obliquely illuminate in a direction perpendicular to the second sub-end face. The other illumination window 122 may be disposed on the first sub-end face 124, emitting light that can illuminate perpendicularly to the first sub-end face 124. This creates a sufficiently large illumination range to facilitate surgical procedures using treatment instruments.

[0036] For example, the first acoustic window 110 of the first ultrasound component has a shape that extends along a second lateral direction, and the second acoustic window 150 of the second ultrasound component has a shape that extends along an axis. Thus, there can be little or no overlap between the first and second ultrasound viewing angles, allowing for a larger imaging range during ultrasound examination. In some embodiments, the edge of the first ultrasound viewing angle is adjacent to the edge of the second ultrasound viewing angle, or there is a small overlap between the first and second ultrasound viewing angles at their edges, allowing the operator to easily switch from the first ultrasound viewing angle to the second ultrasound viewing angle to observe ultrasound imaging of adjacent tissues. Even when there is some overlap between the edges of the first and second ultrasound viewing angles, the operator can also use the characteristics of the overlapping area as a reference to determine the positional relationship between the tissue areas examined by the first and second ultrasound viewing angles respectively.

[0037] Since the endoscope needs to be inserted into the patient's body via a trocar, the size of the trocar is subject to certain requirements to minimize damage to the patient. Therefore, there is an upper limit to the diameter of the endoscope. Typically, the diameter of the endoscope does not exceed 12 mm. Therefore, the length of the first ultrasound component that can be mounted on the end face 120 will not exceed 12 mm. Compared to the size of the end face 120, the length of the first sub-side face 140 is relatively large. Therefore, exemplarily, the length of the second ultrasound component is greater than the length of the first ultrasound component. This allows the second ultrasound component to achieve a larger scanning range, and when the scanning range of the first ultrasound component is insufficient, the second ultrasound component can be switched for scanning.

[0038] For example, such as Figure 3 As shown by the dashed line, an instrument channel is provided within the head end portion 100. The instrument channel includes a first channel segment located in the proximal end of the head end portion 100 and a second channel segment located in the distal end of the head end portion 100, wherein: the first channel segment 161 is closer to the axis of the head end portion 100 than the instrument channel opening 130, and the second channel segment 162 connects the first channel segment 161 and the instrument channel opening 130. In some embodiments, the second channel segment 162 may be straight, connecting obliquely from the distal end of the first channel segment 161 to the instrument channel opening 130. In other embodiments, the second channel segment 162 may be curved, connecting obliquely from the distal end of the first channel segment 161 to the instrument channel opening 130. Due to the limited diameter of the endoscope, the second ultrasound component typically does not protrude from the side of the head end portion 100. In one embodiment, the first channel segment 161 of the instrument channel is located at the center of the head end portion 100 and connects to the instrument channel opening 130, which is offset from the head end portion, via the oblique second channel segment 162. In other embodiments, the first channel segment 161 can also be positioned close to the second ultrasound component or close to the optical component, as long as the second ultrasound component has sufficient installation space. The tilted second channel segment 162 not only creates space to avoid the second ultrasound component, but also guides the treatment instrument, causing it to shift towards the scanning field of view of the second ultrasound component, thereby facilitating ultrasound-guided puncture and other operations.

[0039] This application also provides a laparoscope. (Return to Reference) Figure 1The endoscope may include an insertion portion 10, which includes a bend 200 and a tip 100 in any embodiment. The tip 100 is connected to the distal end of the bend 200. The bend 200 can be bent during operation, thereby orienting the tip 100 to a suitable location. In an exemplary embodiment, the bend 200 may employ a flexible, serpentine tube, which can be straightened and bent by a traction rope located within the tube. The endoscope may also include an ultrasound connector 30, which can be connected to the main unit of an ultrasound device to display ultrasound images. In embodiments where the tip 100 is provided with optical elements, the endoscope may also include a light guide 40, which can be connected to an optical imaging device to provide illumination and display optical images.

[0040] Exemplarily, the endoscope may further include an operating section 20 connected to the proximal end of the insertion section 10. In some embodiments, the bend 200 may be directly connected to the operating section 20. In other embodiments, the bend 200 may be connected to the operating section 20 via a rigid tube 300. The length of the rigid tube 300 may be much greater than the length of the bend 200, such that the insertion section 10 is rigid overall and bendable only near the tip, preventing the endoscope from bending during use and facilitating insertion of the endoscope into the patient via a trocar.

[0041] For example, the operation unit 20 may be provided with operation buttons, and the control buttons may support custom functions such as freezing / thawing the image or adjusting parameters.

[0042] For example, the surface of the operating part 20 may also be provided with an instrument channel inlet 21, and the insertion part 10 is also provided with an instrument channel. The instrument channel inlet 21 is connected to the instrument channel outlet on the head end 100 via the instrument channel. Thus, the operator can insert the treatment instrument into the instrument channel inlet 21 outside the patient's body, and the treatment instrument can be guided along the instrument channel and extend out from the instrument opening.

[0043] Exemplarily, the operating part 20 is provided with a knob and a latch. The knob controls the bending of the bending part 200, and the latch locks the knob. Taking the embodiment mentioned above, where the bending part 200 includes a snake-like flexible tube, as an example, a traction rope can be connected to the knob. When the knob is rotated, the traction rope on one side contracts, and the traction rope on the other side extends, thereby causing the bending part 200 to bend in one direction or change from a bent state to a straight state. In other embodiments, the knob can also control the bending part 200 by any existing or future possible means, such as electrical control or hydraulic control. When the bending part 200 bends to a suitable angle, the latch can lock the knob, keeping the bending part 200 in its current state, facilitating one-handed operation by the operator. The operating part 20 can be configured in a shape that is easy for the operator to hold. In some embodiments, the operating part 20 can also be configured for connection to a device such as a surgical robotic arm.

[0044] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0045] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0047] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0048] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A head end portion of a scope, comprising: The head end portion has an end face facing distally and a side face extending proximally from the edge of the end face, the head end portion comprising: A first ultrasonic component, the first ultrasonic component having a first acoustic window, the first acoustic window being disposed on the end face; An instrument channel opening, wherein the instrument channel opening is disposed on the end face; and A second ultrasound component having a second acoustic window disposed on the side of the head end, and the instrument channel opening located between the first acoustic window and the second acoustic window.

2. The head portion of claim 1, wherein The side surface includes a first sub-side surface and a second sub-side surface disposed opposite each other along a first lateral direction, the first lateral direction being perpendicular to the axis of the head end. The second acoustic window of the second ultrasound component is disposed on the first sub-side surface. The instrument channel opening is offset relative to the center of the end face toward the first sub-side face along the first lateral direction.

3. The head portion of claim 2, wherein The end face includes a first sub-end face and a second sub-end face adjacent to each other along the first lateral direction. The first sub-side face is adjacent to the first sub-end face, and the second sub-side face is adjacent to the second end face. The instrument channel opening is disposed on the first sub-end face, wherein: Along the direction from the first sub-end face to the second sub-side face, the second sub-end face is inclined toward the proximal end of the head end; and The head end also includes an optical component, the observation window of which is disposed on the second sub-end face.

4. The head portion of claim 3, wherein The first acoustic window of the first ultrasonic component has a shape that extends along a second lateral direction perpendicular to the first lateral direction, and the first acoustic window of the first ultrasonic component is disposed on the first sub-end face.

5. The head portion of claim 3, wherein The head end also includes a plurality of lighting windows, which are respectively disposed on opposite sides of the first ultrasonic component along the first lateral direction.

6. The head portion of claim 1, wherein The side surface includes a first sub-side surface and a second sub-side surface disposed opposite each other along a first lateral direction, the first lateral direction being perpendicular to the axis of the head end. The second acoustic window of the second ultrasound component is disposed on the first sub-side surface, wherein: The first acoustic window of the first ultrasonic component has a shape that extends along a second lateral direction perpendicular to the first lateral direction. The second acoustic window of the second ultrasonic component has a shape that extends along the axis.

7. The head portion of claim 6, wherein The length of the second ultrasonic component is greater than the length of the first ultrasonic component.

8. The head portion of claim 1, wherein, An instrument channel is provided within the head end portion, the instrument channel comprising a first channel segment located in the proximal end portion of the head end portion and a second channel segment located in the distal end portion of the head end portion, wherein: The first channel segment is closer to the axis of the head end than the instrument channel opening, and the second channel segment connects the first channel segment and the instrument channel opening.

9. A scope, characterized by, It includes an insertion portion, the insertion portion including a curved portion and a head end portion as claimed in any one of claims 1-8, the head end portion being connected to the distal end of the curved portion.

10. The chamber of claim 9 wherein, The endoscope further includes an operating section connected to the proximal end of the insertion section, wherein: The operating unit is equipped with operating buttons; and / or The operating part has an instrument channel inlet on its surface, and the insertion part also has an instrument channel. The instrument channel inlet is connected to the instrument channel outlet on the head end via the instrument channel; and / or The insertion portion includes a rigid tube connected between the operating portion and the curved portion; and / or The operating part is provided with a knob and a latch. The knob is used to control the bending of the bending part, and the latch is used to lock the knob.

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