Endoscope

Abstract

The endoscope comprises an insertion tube, a tip part, a first bending control wire and a second bending control wire, and the insertion tube comprises a main body section, a first bending adjustment section and a second bending adjustment section which are sequentially arranged from the near end to the far end; the far end of the first bending control wire is connected to the first bending adjusting section; the far end of the second bending control wire is connected to the second bending adjusting section; the tip part is connected to the far end of the second bending adjusting section, and a camera is arranged on the tip part. According to the endoscope, the first bending adjusting section and the second bending adjusting section which can be bent independently are arranged on the insertion tube, the visual angle of the camera on the tip part can be adjusted through double-section bending adjustment, the visual field range which can be observed by the endoscope is wider, the operation of surgical instruments and the excision condition of diseased tissue can be better observed through the endoscope, and the operation efficiency is improved. And the surgical operation difficulty of surgical operators can be reduced to a great extent.

Description

Technical Field

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

[0002] An endoscope is a medical device that extends into the body cavity through a natural orifice of the human body or a small hole made by surgery and observes the internal conditions of the human body. After entering the human body, the endoscope often needs to change the bending direction of the insertion tube to adapt to the shape of the orifice or make the distal camera face the diseased area directly. In the prior art, the insertion tube of the endoscope usually has only one bending section, and the bending section can only be bent once in one direction. After one bending, the viewing angle of the camera is fixed, and it is impossible to observe the symptoms of the diseased area from different viewing angles, which increases the operation difficulty of the surgery. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the viewing angle of the endoscope in the prior art is inconvenient to adjust, so as to provide an endoscope.

[0004] To solve the above technical problem, the technical solution of the utility model is as follows:

[0005] Including:

[0006] An insertion tube, including a main body section, a first bending section, and a second bending section sequentially arranged from the proximal end to the distal end;

[0007] A first bending control wire, whose distal end is connected to the first bending section, and whose proximal end extends through the inner cavity of the insertion tube to the proximal end of the insertion tube; the first bending control wire is used to drive the first bending section to bend relative to the main body section;

[0008] A second bending control wire, whose distal end is connected to the second bending section, and whose proximal end extends through the inner cavity of the insertion tube to the proximal end of the insertion tube; the second bending control wire is used to drive the second bending section to bend relative to the first bending section;

[0009] A distal end portion, connected to the distal end of the second bending section, and a camera is provided on the distal end portion.

[0010] Further, after the first bending section bends relative to the main body section, it forms a first plane with the main body section, and after the second bending section bends relative to the first bending section, it forms a second plane with the first bending section. The first plane and the second plane coincide, and the bending directions of the first bending section and the second bending section in the coincident plane are opposite.

[0011] Further, the insertion tube has at least a first bending state; in the first bending state, the main body section, the first bending section, and the second bending section are in an S shape.

[0012] Further, the maximum bending angle of the second bending section relative to the first bending section is greater than 90°.

[0013] Further, the range of the maximum bending angle of the second bending section relative to the first bending section is 110° - 140°.

[0014] Further, the insertion tube includes a main body tube, a first bending tube, and a second bending tube that are sequentially connected from the proximal end to the distal end. The main body section is the main body tube, the first bending section is provided on the first bending tube, and the second bending section is provided on the second bending tube; the distal end portion is connected to the distal end of the second bending tube.

[0015] Further, the first bending tube includes a plurality of first joints arranged in sequence, and adjacent two of the first joints are hinged and connected by a pair of first rivets arranged oppositely; the second bending tube includes a plurality of second joints arranged in sequence, and adjacent two of the second joints are hinged and connected by a pair of second rivets arranged oppositely.

[0016] Further, the connection line formed by sequentially arranging a plurality of first rivets on the same side of the first bending tube is the first rivet connection line, and the connection line formed by sequentially arranging a plurality of second rivets on the same side of the second bending tube is the second rivet connection line; when the first bending tube and the second bending tube are both in the straight arrangement state before bending, the first rivet connection line and the second rivet connection line on the same side are on the same straight line.

[0017] Further, there are two first wire control wires and two second wire control wires; the distal ends of the two first wire control wires are fixedly connected to opposite sides of the most distal first joint, and the distal ends of the two second wire control wires are fixedly connected to opposite sides of the most distal second joint.

[0018] Further, two relatively arranged first wire guide channels are provided on the inner wall of the first bending tube, and each first wire control wire passes through one of the first wire guide channels; two relatively arranged second wire guide channels are provided on the inner wall of the second bending tube, and each second wire control wire passes through one of the second wire guide channels.

[0019] Further, the first joint includes a first head joint located at the outermost distal end. Two oppositely arranged third guide wire channels are provided on the inner wall of the first head joint. Two oppositely arranged fourth guide wire channels are further provided on the inner wall of the first bending tube. The fourth guide wire channels are parallel to the first rivet connection line. The entrance of the third guide wire channel is correspondingly arranged with the exit of a corresponding second guide wire channel, and the exit of the third guide wire channel is correspondingly arranged with the entrance of a corresponding fourth guide wire channel. Each second bending control wire sequentially passes through the second guide wire channel, the third guide wire channel, and the fourth guide wire channel.

[0020] Further, in the circumferential direction of the first bending tube, the entrance and the exit of the third guide wire channel are arranged in a staggered manner, and the size of the staggered angle is 85° - 95°.

[0021] Further, the first joint includes a first head joint, a first tail joint, and multiple first intermediate joints connected between the first head joint and the first tail joint; the second joint includes a second head joint, a second tail joint, and multiple second intermediate joints connected between the second head joint and the second tail joint; the number of segments of the second intermediate joints is greater than the number of segments of the first intermediate joints.

[0022] Further, the first joint includes a first joint barrel wall in a cylindrical shape and a first hanging plate connected inside the first joint barrel wall. A first hanging ear formed by an inner depression is provided on the first joint barrel wall. The first hanging ear and the inner wall of the first joint barrel wall enclose a first guide wire channel. A first middle hole is provided at the middle position of the first hanging plate. Two first side through holes are further provided on the first hanging plate on opposite sides of the first middle hole. The channels formed by the docking of the multiple first side through holes on the multiple first joints are the fourth guide wire channels.

[0023] Further, the second joint includes a second joint barrel wall in a cylindrical shape and a second hanging plate connected inside the second joint barrel wall. A second hanging ear formed by an inner depression is provided on the second joint barrel wall. The second hanging ear and the inner wall of the second joint barrel wall enclose a second guide wire channel. A second middle hole is provided at the middle position of the second hanging plate.

[0024] Further, a nozzle with an opening facing the camera is further provided at the end of the tip portion. The nozzle is communicated with a gas-liquid pipe. Middle holes are provided at the central positions inside the first bending section and the second bending section. The gas-liquid pipe is arranged through the middle holes.

[0025] Further, an illumination window is provided on the end face of the tip portion, and the illumination window is connected to an optical fiber bundle; a side gap is further provided inside the first bending section and the second bending section, and the optical fiber bundle is threaded through the side gap.

[0026] Further, the outer peripheries of the first bending section and the second bending section are both covered with a mesh cover, and the outer periphery of the whole of the first bending section and the second bending section is further covered with a rubber sleeve.

[0027] The endoscope provided by the present utility model, by providing a first bending section and a second bending section on the insertion tube that can be bent independently, the viewing angle of the camera on the tip portion can be adjusted through double-section bending, so that the viewing range that the endoscope can observe is wider. Such an endoscope can better observe the operation of surgical instruments and the resection situation of diseased tissues, and can greatly reduce the operation difficulty of surgical operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the endoscope in the embodiment of the present utility model;

[0030] Figure 2 It is a structural schematic diagram of the tip portion in the embodiment of the present utility model;

[0031] Figure 3 It is a structural schematic diagram of the distal end of the endoscope in the embodiment of the present utility model;

[0032] Figure 4 It is a side-sectional structural schematic diagram of the endoscope in the embodiment of the present utility model;

[0033] Figure 5 It is a structural schematic diagram of one end where the first bending tube and the second bending tube are connected in the embodiment of the present utility model;

[0034] Figure 6 It is a structural schematic diagram of the first joint in the embodiment of the present utility model;

[0035] Figure 7 It is a structural schematic diagram of the second joint in the embodiment of the present utility model;

[0036] Figure 8This is a schematic structural diagram when the rubber sleeve is sleeved on the outer periphery of the first bending pipe and the second bending pipe in the embodiment of the present utility model.

[0037] Description of reference numerals: 1, main body pipe; 2, first bending pipe; 21, first joint; 22, first rivet; 21a, first head-end joint; 21b, first middle joint; 21c, first tail-end joint 21c; 211, first joint cylinder wall; 212, first hanging plate; 213, first hanging ear; 214, first guide wire channel; 215, first middle hole; 216, first side gap; 217, first side through hole; 218, third guide wire channel; 3, second bending pipe; 31, second joint; 32, second rivet; 31, second joint; 32, second rivet; 31a, second head-end joint; 31b, second middle joint; 31c, second tail-end joint; 311, second joint cylinder wall; 312, second hanging plate; 313, second hanging ear; 314, second guide wire channel; 315, second middle hole; 316, second side gap; 4, tip; 51, first bending control wire; 52, second bending control wire; 61, camera; 62, cable; 71, nozzle; 72, gas-liquid pipe; 81, lighting window; 9, spring tube; 10, rubber sleeve. Detailed implementation manners

[0038] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] The endoscope mainly includes an insertion tube, a distal end portion, and an operation portion. The insertion tube is adapted to extend into the body cavity through a channel, and the insertion tube can be bent to adapt to the shape of the channel. The distal end portion is connected to the distal end of the insertion tube, and a camera is provided on the distal end portion. The operation portion is connected to the proximal end of the insertion tube, and the operation portion is used to control the bending of the insertion tube. After the insertion tube passes through the channel and reaches the target position, the camera on the distal end portion can observe the field of view at the target position. During the endoscopic submucosal dissection surgery, it is convenient for the operator to use surgical instruments to excise the diseased tissue. Therefore, whether the field of view of the endoscope is broad and clear largely determines the difficulty of the surgical operation, and it has a very important role in the endoscopic submucosal dissection surgery. After the insertion tube of the traditional endoscope reaches the target position, the observation angle of the endoscope is fixed, and the symptoms of the diseased area cannot be observed from different perspectives, which increases the operation difficulty of the endoscopic submucosal dissection surgery.

[0042] To solve the above technical problems, as Figure 1 shown in FIG. -8, an embodiment of the present application provides an endoscope, including an insertion tube, a distal end portion 4, and an operation portion (not shown in the figure). The operation portion is connected to the proximal end of the insertion tube, and the distal end portion 4 is connected to the distal end of the insertion tube. Among them, the distal end refers to the end far from the operator, and the proximal end refers to the end close to the operator.

[0043] In some embodiments, as Figure 2 and Figure 4As shown in the figure, the endoscope further includes a camera device, a lighting device, and a cleaning device. The camera device includes a camera 61 disposed on the distal end surface of the distal end portion 4 and a cable 62 connected to the camera 61. The cable 62 is disposed in the inner cavity of the insertion tube. The camera 61 is used to collect optical image signals and transmit the optical image signals outward through the cable 62. The lighting device includes a pair of lighting windows 81 disposed on the distal end surface of the distal end portion 4 and an optical fiber bundle connected to the pair of lighting windows 81. The pair of lighting windows 81 are respectively located on opposite sides of the camera 61. The optical fiber bundle is connected to the pair of lighting windows 81 through a Y-shaped optical fiber. The optical fiber bundle is disposed in the inner cavity of the insertion tube. The pair of lighting windows 81 are used to provide light to facilitate the camera 61 to collect optical image signals in a bright environment. The cleaning device includes a nozzle 71 disposed on the distal end surface of the distal end portion 4 and a gas-liquid tube 72 communicated with the nozzle 71. The gas-liquid tube 72 is disposed in the inner cavity of the insertion tube. The opening of the nozzle 71 is disposed facing the camera 61. The nozzle 71 cleans the surface of the camera 61 by spraying cleaning liquid or air to ensure a clean and clear field of view.

[0044] In this embodiment, the insertion tube includes a main body section, a first bending section, and a second bending section sequentially arranged from the proximal end to the distal end. The proximal end of the main body section is connected to the operation section. The first bending section can be bent relative to the main body section, and the second bending section can be bent relative to the first bending section. The distal end portion 4 is connected to the distal end of the second bending section. As Figure 4 shown in the figure, the endoscope further includes a first bending control wire 51 and a second bending control wire 52. The distal end of the first bending control wire 51 is connected to the first bending section, and the proximal end passes through the inner cavity of the insertion tube and is connected to the operation section at the proximal end of the insertion tube. The operation section can pull the first bending section to bend relative to the main body section by controlling the first bending control wire 51. The distal end of the second bending control wire 52 is connected to the second bending section, and the proximal end passes through the inner cavity of the insertion tube and is connected to the operation section at the proximal end of the insertion tube. The operation section can pull the second bending section to bend relative to the first bending section again by controlling the second bending control wire 52.

[0045] In some embodiments, the insertion tube is formed by sequentially connecting multiple pipe bodies. The main body section, the first bending section, and the second bending section are respectively disposed on different pipe bodies. In other embodiments, the insertion tube can also be an integral single-section pipe body. The main body section, the first bending section, and the second bending section are respectively disposed on different pipe segments of the insertion tube. The first bending section and the second bending section with low hardness and easy to bend are formed by arranging multiple slots on the local pipe wall of the insertion tube.

[0046] Taking the embodiment in which the insertion tube is formed by sequentially connecting multiple pipe bodies as an example, the double-section bending structure of the insertion tube will be specifically described below. As Figure 1As shown in Fig. -3, the insertion tube includes a main body tube 1, a first bending tube 2, and a second bending tube 3, which are sequentially connected from the proximal end to the distal end; the main body section is the main body tube 1, the first bending section is provided on the first bending tube 2, and the second bending section is provided on the second bending tube 3; the distal end portion 4 is connected to the distal end of the second bending tube 3. The second bending tube 3 can be directly connected to the first bending tube 2, or the second bending tube 3 can be indirectly connected to the first bending tube 2 through a small intermediate transition tube body. This insertion tube formed by sequentially connecting multiple tube bodies can be processed in sections, and the processing difficulty is relatively lower.

[0047] Specifically, after the first bending tube 2 is bent relative to the main body tube 1, it forms a first plane with the main body tube 1. After the second bending tube 3 is bent relative to the first bending tube 2, it forms a second plane with the first bending tube 2, and the first plane and the second plane coincide. When the first bending tube 2 and the second bending tube 3 are bent in opposite directions in the coincident plane, the main body tube 1, the first bending tube 2, and the second bending section are in an S shape. This double-section bending method of the first bending tube 2 and the second bending tube 3 facilitates the camera 61 on the distal end portion 4 to obtain a downward-looking perspective view from top to bottom, making the observation field of view of the endoscope wider. It should be noted that the first bending tube 2 can be bent 90° relative to the main body tube 1, and the maximum bending angle of the second bending tube 3 relative to the first bending tube 2 is greater than 90°, so as to ensure that the camera 61 can obtain a downward-looking perspective view from top to bottom.

[0048] Furthermore, the range of the maximum bending angle of the second bending tube 3 relative to the first bending tube 2 is 110° - 140°. More preferably, the maximum bending angle of the second bending tube 3 relative to the first bending tube 2 is 125°. At this time, the camera 61 can obtain a downward-looking perspective view inclined 35° relative to the horizontal plane. Generally, in this downward-looking perspective view, the observation angle of the camera 61 can reach the maximum. It should be noted that during the bending process of the distal end of the insertion tube, it has at least the following states: that is, the first bending tube 2 is bent counterclockwise upward 90° relative to the main body tube 1, and the second bending tube 3 is bent clockwise downward 125° relative to the first bending tube 2.

[0049] In some embodiments, the first bending tube 2 and the second bending tube 3 are provided with a central hole located in the middle position and a side gap located in the peripheral position inside. The gas-liquid tube 72 is passed through the central hole, and the cable 62 and the optical fiber bundle are passed through the side gap. Since the gas-liquid tube 72 has relatively high hardness, passing the gas-liquid tube 72 through the central hole in the inner cavity of the first bending tube 2 and the second bending tube 3 can reduce the pulling effect of the gas-liquid tube 72 on the bending process of the insertion tube; while the cable 62 and the optical fiber bundle are relatively soft and can pass through the side gap.

[0050] As Figure 3As shown, the first bending pipe 2 includes multiple first joints 21 connected in sequence. Adjacent two first joints 21 are hinged and connected by a pair of first rivets 22 arranged oppositely. The second bending pipe 3 includes multiple second joints 31 connected in sequence. Adjacent two second joints 31 are hinged and connected by a pair of second rivets 32 arranged oppositely. The first joint 21 includes a first head joint 21a, a first tail joint 21c, and multiple first intermediate joints 21b connected between the first head joint 21a and the first tail joint 21c. The second joint 31 includes a second head joint 31a, a second tail joint 31c, and multiple second intermediate joints 31b connected between the second head joint 31a and the second tail joint 31c. The first head joint 21a, the first tail joint 21c, the first intermediate joints 21b, the second head joint 31a, the second tail joint 31c, and the second intermediate joints 31b are all cylindrical joints. The lengths of the first head joint 21a and the first tail joint 21c are both greater than the length of the first intermediate joint 21b, and the lengths of the second head joint 31a and the second tail joint 31c are both greater than the length of the second intermediate joint 31b. The first head joint 21a and the second tail joint 31c are adhesively bonded or welded together, the first tail joint 21c and the main body pipe 1 are adhesively bonded or welded together, and the first head joint 21a and the tip part 4 are adhesively bonded or welded together. The widths of the multiple first intermediate joints 21b and the multiple second intermediate joints 31b are all equal, and the number of the second intermediate joints 31b is greater than the number of the first intermediate joints 21b, so that the second bending pipe 3 can be bent at a larger angle.

[0051] As Figure 3 and Figure 4 shown, there are two first bending control wires 51 and two second bending control wires 52; the distal ends of the two first bending control wires 51 are fixedly connected to opposite sides of the first head joint 21a, and the distal ends of the two second bending control wires 52 are fixedly connected to opposite sides of the second head joint 31a. By applying different magnitudes of forces to the two first bending control wires 51, the bending direction and the magnitude of the bending angle of the first bending pipe 2 can be controlled, and by applying different magnitudes of forces to the two second bending control wires 52, the bending direction and the magnitude of the bending angle of the second bending pipe 3 can be controlled.

[0052] The connection line formed by arranging multiple first rivets 22 on the same side of the first bending pipe 2 in sequence is the first rivet connection line, and the connection line formed by arranging multiple second rivets on the same side of the second bending pipe 3 in sequence is the second rivet connection line. When the first bending pipe 2 and the second bending pipe 3 are both in the straight arrangement state before bending, the first rivet connection line and the second rivet connection line on the same side are on the same straight line, so that the first bending pipe 2 and the second bending pipe 3 can be bent in the same plane.

[0053] As Figure 4As shown, at the position where the first tail-end joint 21c of the first bending pipe 2 penetrates through the first wire control wire 51 and the second wire control wire 52, a section of spring pipe 9 is welded. The function of the spring pipe 9 is to wrap the first wire control wire 51 or the second wire control wire 52 to prevent the first wire control wire 51 and the second wire control wire 52 from rubbing against other components inside the insertion pipe, resulting in excessive resistance or severe wear.

[0054] As Figure 4 -6 shows that two first wire guide channels 214 are provided on the opposite inner side walls of the first bending pipe 2, and each first wire control wire 51 passes through one of the first wire guide channels 214; in the circumferential direction of the first bending pipe 2, the included angle between the first rivet connection line and the first wire guide channel 214 is 90°. Two second wire guide channels 314 are provided on the opposite inner side walls of the second bending pipe 3, and each second wire control wire 52 passes through one of the second wire guide channels 314; in the circumferential direction of the second bending pipe 3, the included angle between the second rivet connection line and the second wire guide channel 314 is 90°. With such a setting, when the first wire control wire 51 and the second wire control wire 52 are pulled, it is easy to drive the first bending pipe 2 and the second bending pipe 3 to bend.

[0055] As Figure 1 and Figure 5 shown, a pair of third wire guide channels 218 are provided inside the first head-end joint 21a, and two fourth wire guide channels are also provided on the inner side walls of the first bending pipe 2 corresponding to the two first rivet connection lines. The fourth wire guide channels are arranged parallel to the first rivet connection lines; in the circumferential direction of the first bending pipe 2, the included angle between the first wire guide channel 213 and the fourth wire guide channel is 90°. The inlet of the third wire guide channel 218 and the outlet of a corresponding second wire guide channel 314 are correspondingly arranged, and the outlet of the third wire guide channel 218 and the inlet of a corresponding fourth wire guide channel are correspondingly arranged; in the circumferential direction of the first bending pipe 2, the inlet and the outlet of the third wire guide channel 218 are arranged in a staggered manner, and the size of the staggered included angle is 85°-95°. Preferably, the staggered included angle is 90°; the second wire control wire 52 sequentially passes through the second wire guide channel 314, the third wire guide channel 218 and the fourth wire guide channel and then extends into the inner cavity of the main pipe 1. After being guided by the third wire guide channel 218, the second wire control wire 52 will rotate 90°, and then route along the guidance of the fourth wire guide channel; when the first bending pipe 2 bends, the positions of the two first rivet connection lines are the areas with the smallest length change on the first bending pipe 2, and the two fourth wire guide channels are arranged parallel to the two first rivet connection lines. The second wire control wire 52 routes in the fourth wire guide channel, which can effectively reduce the pulling of the second wire control wire 52 when the first bending pipe 2 bends, and can also effectively reduce the pulling of the first wire control wire 51 when the second bending pipe 3 bends, realizing the independent bending control of the two bending pipes, and an avoidance design can also be carried out in terms of spatial position.

[0056] As shown Figure 6 As shown, the first joint 21 includes a first joint barrel wall 211 in a cylindrical shape and a first hanging plate 212 connected inside the first joint barrel wall 211. The first joint barrel wall 211 and the first hanging plate 212 are of an integrally formed structure. A first hanging ear 213 formed by an inner depression is provided on the first joint barrel wall 211. The first hanging ear 213 and the inner wall of the first joint barrel wall 211 enclose a first guide wire channel 214. A first middle hole 215 is provided at the middle position of the first hanging plate 212. Two first side gaps 216 are formed by the enclosure of the first hanging plate 212 and the first joint barrel wall 211. The two first side gaps 216 are located on the opposite sides of the first hanging plate 212. Two first side through holes 217 are additionally provided on the first hanging plate 212 on the opposite sides of the first middle hole 215. The channels formed by the docking of the multiple first side through holes 217 on the multiple first joints 21 are the fourth guide wire channels.

[0057] As shown Figure 7 As shown, the second joint 31 includes a second joint barrel wall 311 in a cylindrical shape and a second hanging plate 312 connected inside the second joint barrel wall 311. The second joint barrel wall 311 and the second hanging plate 312 are of an integrally formed structure. A second hanging ear 313 formed by an inner depression is provided on the second joint barrel wall 311. The second hanging ear 313 and the inner wall of the second joint barrel wall 311 enclose a second guide wire channel 314. A second middle hole 315 is provided at the middle position of the second hanging plate 312. Two second side gaps 316 are formed by the enclosure of the second hanging plate 312 and the second joint barrel wall 311. The two second side gaps 316 are located on the opposite sides of the second hanging plate 312. The difference between the second joint 31 and the first joint 21 is that there are no side through holes on the second hanging plate 312 of the second joint 31.

[0058] Among them, the gas-liquid pipe 72 is inserted through the first middle hole 215 and the second middle hole 315, and the cable 62 and the optical fiber bundle are inserted through the first side gaps 216 and the second side gaps 316.

[0059] As shown Figure 8 As shown, the outer peripheries of the first bending tube 2 and the second bending tube 3 are both coated with a mesh cover, and the outer periphery of the whole of the first bending tube 2 and the second bending tube 3 is further coated with a rubber sleeve 10. The rubber sleeve 10 is specifically a bending rubber sleeve. The function of the rubber sleeve 10 is to prevent sharp edges of metal parts such as each joint from scratching tissues, isolate the insertion tube of the endoscope from the external environment, and prevent liquids and impurities from entering the inner cavity of the insertion tube.

[0060] In summary, the endoscope provided by the present utility model is provided with a first bending adjustment tube 2 and a second bending adjustment tube 3 that can be independently bent on the insertion tube. The first bending control wire 51 is used to control the bending of the first bending adjustment tube 2 to adapt to the shape of the duct and extend towards the target position. After the distal end 4 reaches the target position, the second bending control wire 52 is used to control the bending of the second bending adjustment tube 3, which can adjust the viewing angle of the camera 61 on the distal end 4, so that the endoscope can observe a wider field of view. By using this endoscope, the operation of surgical instruments and the resection of diseased tissues can be better observed, which can greatly help the surgical operator reduce the difficulty of the surgical operation.

[0061] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. An endoscope, characterized in that: include: The insertion tube comprises a main body section, a first bending adjustment section and a second bending adjustment section arranged in sequence from the proximal end to the distal end; A first bending control wire (51), the distal end of which is connected to the first bending adjustment section, and the proximal end of which passes through the inner cavity of the insertion tube and extends to the proximal end of the insertion tube; the first bending control wire (51) is used to drive the first bending adjustment section to bend relative to the main body section; A second bending control wire (52), the distal end of which is connected to the second bending adjustment section, and the proximal end of which passes through the inner cavity of the insertion tube and extends to the proximal end of the insertion tube; the second bending control wire (52) is used to drive the second bending adjustment section to bend relative to the first bending adjustment section; A leading end portion (4) is connected to the distal end of the second bending adjustment section, and a camera (61) is provided on the leading end portion (4).

2. The endoscope according to claim 1, characterized in that After the first bending section is bent relative to the main section, it forms a first plane with the main section. After the second bending section is bent relative to the first bending section, it forms a second plane with the first bending section. The first plane and the second plane coincide with each other, and the bending directions of the first bending section and the second bending section in the coincident plane are opposite.

3. The endoscope according to claim 1, the endoscope according to claim 2, characterized in that: The insertion tube has at least a first bending state; in the first bending state, the main body section, the first bending adjustment section and the second bending adjustment section are S-shaped.

4. The endoscope according to claim 2, characterized in that: A maximum bending angle of the second bending section relative to the first bending section is greater than 90°.

5. The endoscope according to claim 4, characterized in that The maximum bending angle of the second bending section relative to the first bending section is in the range of 110° to 140°.

6. The endoscope according to any one of claims 1 to 5, characterized in that: The insertion tube comprises a main body tube (1), a first bending adjustment tube (2) and a second bending adjustment tube (3) which are connected in sequence from the proximal end to the distal end; the main body section is the main body tube (1); the first bending adjustment section is arranged on the first bending adjustment tube (2); the second bending adjustment section is arranged on the second bending adjustment tube (3); and the tip end (4) is connected to the distal end of the second bending adjustment tube (3).

7. The endoscope according to claim 6, characterized in that The first bending adjustment pipe (2) comprises a plurality of first joints (21) arranged in sequence, and two adjacent first joints (21) are hingedly connected via a pair of first rivets (22) arranged oppositely; the second bending adjustment pipe (3) comprises a plurality of second joints (31) arranged in sequence, and two adjacent second joints (31) are hingedly connected via a pair of second rivets (32) arranged oppositely.

8. The endoscope according to claim 7, characterized in that: A connection line formed by sequentially arranging a plurality of first rivets (22) on the same side of the first bending adjustment tube (2) is a first rivet connection line, and a connection line formed by sequentially arranging a plurality of second rivets (32) on the same side of the second bending adjustment tube (3) is a second rivet connection line; when the first bending adjustment tube (2) and the second bending adjustment tube (3) are both in a straight line arrangement state before bending, the first rivet connection line and the second rivet connection line on the same side are on the same straight line.

9. The endoscope according to claim 8, characterized in that There are two of each of the first bending control wires (51) and the second bending control wires (52); the distal ends of the two first bending control wires (51) are fixedly connected to opposite sides of a distalmost first joint (21), and the distal ends of the two second bending control wires (52) are fixedly connected to opposite sides of a distalmost second joint (31).

10. The endoscope according to claim 9, characterized in that The inner wall of the first bending adjustment tube (2) is provided with two first guide wire channels (214) arranged opposite to each other, and each of the first bending control wires (51) passes through one of the first guide wire channels (214); the inner wall of the second bending adjustment tube (3) is provided with two second guide wire channels (314) arranged opposite to each other, and each of the second bending control wires (52) passes through one of the second guide wire channels (314).

11. The endoscope according to claim 10, characterized in that: The first joint (21) comprises a first head end joint (21a) located at the farthest end, and two third guide wire channels (218) are arranged opposite to each other on the inner wall of the first head end joint (21a). Two fourth guide wire channels are arranged opposite to each other on the inner wall of the first bending control tube (2), and the fourth guide wire channels are parallel to the first rivet connection line; the inlet of the third guide wire channel (218) and the outlet of a corresponding second guide wire channel (314) are arranged correspondingly, and the outlet of the third guide wire channel (218) and the inlet of a corresponding fourth guide wire channel are arranged correspondingly, and each of the second bending control wires (52) passes through the second guide wire channel (314), the third guide wire channel (218) and the fourth guide wire channel in sequence.

12. The endoscope according to claim 11, characterized in that In the circumferential direction of the first bending adjustment tube (2), the inlet of the third wire guiding channel (218) and the outlet of the third wire guiding channel (218) are staggered and the staggered angle is 85°-95°.

13. The endoscope according to claim 11, characterized in that The first joint (21) includes a first head end joint (21a), a first tail end joint (21c), and a first intermediate joint (21b) with multiple sections connected between the first head end joint (21a) and the first tail end joint (21c); the second joint (31) includes a second head end joint (31a), a second tail end joint (31c), and a second intermediate joint (31b) with multiple sections connected between the second head end joint (31a) and the second tail end joint (31c); the number of sections of the second intermediate joint (31b) is greater than the number of sections of the first intermediate joint (21b).

14. The endoscope according to claim 11, characterized in that The first joint (21) comprises a first joint barrel wall (211) in a cylindrical shape and a first hanging plate (212) connected to the inside of the first joint barrel wall (211); the first joint barrel wall (211) is provided with a first hanging ear (213) formed by an inner recess; the first hanging ear (213) and the inner wall of the first joint barrel wall (211) are combined to form a first guide wire channel (214); a first central hole (215) is provided in the middle of the first hanging plate (212); the first hanging plate (212) is also provided with two first side through holes (217) located on opposite sides of the first central hole (215); a channel formed by connecting multiple first side through holes (217) on multiple first joints (21) is a fourth guide wire channel.

15. The endoscope according to claim 11, characterized in that The second joint (31) comprises a second joint barrel wall (311) in a cylindrical shape and a second hanging plate (312) connected to the inside of the second joint barrel wall (311); the second joint barrel wall (311) is provided with a second hanging ear (313) formed by an inner recess; the second hanging ear (313) and the inner wall of the second joint barrel wall (311) are combined to form a second guide wire channel (314); and a second center hole (315) is provided in the middle of the second hanging plate (312).

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