Outer cannula for endoscopic surgery

Abstract

Disclosed is an outer cannula for endoscopic surgery, comprising a delivery cannula and a handle connected to a first end of the delivery cannula, and further comprising: four transmission assemblies, each comprising a transmission portion and a transmission member, wherein a transmission hole is formed along the height direction in each of the transmission portions, and the height of the transmission hole in each of the transmission portions is different; two of the transmission portions are located in the upper half region of the delivery cannula, and two of the transmission members penetrate through two of the transmission portions, respectively, and are located in the transmission holes different in height; the remaining two transmission portions are located in the lower half region of the delivery cannula; the transmission portions located in the upper half region and the lower half region of the delivery cannula are staggered in the height projection direction thereof; a channel, wherein the portion of the channel extending into the delivery cannula is arranged alternately with the four transmission members; and a driving unit, arranged in the handle and comprising an electric machine and two output shafts, wherein two of the transmission members located in the upper half region and the lower half region of the delivery cannula are connected to the same output shaft.

Description

Endoscopic surgery sleeve

[0001] The present application claims priority to Chinese Patent Application No. 2024109543011, filed on July 16, 2024. The present application incorporates the entirety of the aforementioned Chinese Patent Application. TECHNICAL FIELD

[0002] The present application relates to the technical field of endoscopic surgery, in particular to an endoscopic surgery sleeve. BACKGROUND

[0003] In endoscopic (soft mirror) surgery, a sleeve is usually used to insert instruments or visual probes into the patient's body for surgery. The sleeve includes a handle and a delivery sleeve (also known as a sleeve insertion portion) that extends into the patient's body. The existing sleeve handle uses two pulleys to drive a chain that is orthogonally (horizontally and vertically) arranged in the delivery sleeve to move and then drive the end of the delivery sleeve away from the handle to swing. Since the chain is arranged orthogonally in the delivery sleeve, it occupies the vertical and horizontal space on the inner wall of the delivery sleeve, so that the cavity in the delivery sleeve that accommodates the instruments or visual probes has to bypass the vertical and horizontal space on the inner wall of the delivery sleeve. In the case where the size of the cavity remains unchanged, the cavity arranged orthogonally can only be arranged horizontally side by side, for example, two cavities are arranged side by side. For endoscopic surgery, the diameter of the delivery sleeve that extends into the patient's body needs to be strictly limited. Therefore, in the context of the existing endoscopic surgery, the number and arrangement of cavities in the delivery sleeve cannot meet the needs of endoscopic surgery. Continuing to increase the number of cavities in the horizontal direction will further increase the diameter of the delivery sleeve, and simultaneously inserting two or more instruments into the same cavity may also pose a safety hazard. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defect that the number and arrangement of cavities in the delivery sleeve of the existing sleeve are unreasonable, and to provide an endoscopic surgery sleeve.

[0005] The present application solves the above technical problem by the following technical scheme:

[0006] An endoscopic surgery sleeve, comprising a delivery sleeve and a handle connected to a first end of the delivery sleeve, the endoscopic surgery sleeve further comprising:

[0007] The transmission assembly is provided with four, each of which includes a transmission part and a transmission member, the transmission member extends from the first end of the delivery sleeve to the second end of the delivery sleeve, the transmission part is provided with a transmission hole in the height direction, and the transmission holes on each of the transmission parts are different in height, wherein two of the transmission parts are located in the upper half region of the delivery sleeve, and two of the transmission members are respectively arranged on the two transmission parts and located in the transmission holes of different heights; the remaining two transmission parts are located in the lower half region of the delivery sleeve, and two transmission members are respectively arranged on the two transmission parts and located in the transmission holes of different heights; the transmission parts located in the upper half region of the delivery sleeve and the lower half region of the delivery sleeve are arranged in the projection direction of their own height.

[0008] The channel is used to accommodate instruments, the inlet of the channel is arranged near the first end of the delivery sleeve and on the outer surface of the delivery sleeve, and the part of the channel extending into the delivery sleeve is arranged away from the four transmission members.

[0009] The drive unit is arranged in the handle, and the drive unit includes a motor and two output shafts, and two transmission members located in the upper half region and the lower half region of the delivery sleeve are connected to the same output shaft.

[0010] In the scheme, by arranging the transmission assembly and arranging the transmission parts of the transmission assembly in the upper half region and the lower half region of the delivery sleeve, and arranging four transmission members in the transmission holes of different heights in the same region corresponding to the upper half region and the lower half region of the delivery sleeve, the output shaft and the handle are linked in a limited space, and then the handle drives the second end of the delivery sleeve to move; in addition, the transmission members arranged in the transmission holes of different heights can effectively prevent the transmission members in the delivery sleeve from interfering with each other. Further, the delivery sleeve is provided with a channel in addition to the transmission assembly driving the second end of the delivery sleeve, the channel is used to accommodate instruments, and the channel is arranged away from the transmission members, that is, in addition to arranging four transmission members in a limited space, the instruments can also extend into the delivery sleeve, and the two do not interfere with each other, and the space in the delivery sleeve is reasonably utilized.

[0011] Preferably, the endoscopic surgical sleeve further comprises an adapter assembly, the adapter assembly is arranged between the transmission assembly and the drive unit in the radial direction of the delivery sleeve, and the second end of the delivery sleeve is connected with the drive unit through the adapter assembly and the transmission assembly.

[0012] In the present solution, the driving unit and the transmission assembly are communicated through the adapter assembly, and the adapter assembly occupies less space in the space inside the delivery sleeve, especially in the length direction of the delivery sleeve, so as to realize the power transmission from the motor to the transmission assembly in a limited space.

[0013] Preferably, the adapter assembly comprises a wire winding shaft arranged in the radial direction of the delivery sleeve, and the transmission part is arranged corresponding to the wire winding shaft, and the transmission hole on the transmission part comprises a first section parallel to the axial direction of the delivery sleeve and a second section arranged at an angle of 0-40° with the axial direction of the delivery sleeve.

[0014] In the present solution, the transmission part needs to have a certain torque to drive the bending movement of the second end of the delivery sleeve through high tension, and the internal space of the delivery sleeve is limited, so as to realize the torque of the transmission part. Therefore, the second section of the transmission hole is arranged at the above-mentioned angle. It can be understood that the part of the transmission part between the transmission part and the wire winding shaft maintains the above-mentioned angle through the second section, effectively transmits the power of the handle, and makes the transmission part have the required torque to effectively drive the movement of the second end of the delivery sleeve. In addition, the transmission hole with the above-mentioned angle can avoid interference with other transmission parts in the limited internal space of the delivery sleeve.

[0015] Preferably, the transmission part located in the upper half region of the delivery sleeve is arranged towards the axial direction of the delivery sleeve, and the transmission part located in the lower half region of the delivery sleeve is arranged outward from the axial direction of the delivery sleeve.

[0016] In the present solution, the transmission parts on the transmission parts in different regions are arranged staggered to avoid interference.

[0017] Preferably, a spring tube is arranged in the transmission hole, the transmission part is arranged in the spring tube and extends towards the second end of the delivery sleeve, and the spring tube extends from the transmission hole to the second end of the delivery sleeve.

[0018] In the present solution, the transmission part is sleeved with a spring tube, and a smaller and thinner spring tube is used to facilitate the installation in the internal space of the delivery sleeve, and the pulley or bearing is omitted, and the turning of the transmission part is directly guided through the spring tube.

[0019] Preferably, the wire winding shaft is provided with two, and each of the wire winding shafts is provided with two wire winding wheels, and the two wire winding wheels on the same wire winding shaft are connected with two transmission members respectively, wherein one of the two transmission members is located in the upper half region of the delivery sleeve, and the other is located in the lower half region of the delivery sleeve, and the two transmission members are located in the left half region and the right half region of the delivery sleeve respectively.

[0020] In the scheme, by the above arrangement, two of the four transmission members are arranged in the left half region and the right half region of the delivery sleeve respectively, and are located in the upper half region and the lower half region respectively, that is, the two transmission members arranged staggered are connected with the two wire winding wheels on the same wire winding shaft, which meets the torque requirement of the transmission member on the one hand, and the transmission members located in different regions can be reasonably arranged in the limited region of the delivery sleeve and prevent interference.

[0021] Preferably, the two wire winding shafts are arranged side by side in the radial direction of the delivery sleeve.

[0022] In the scheme, by the above arrangement, compared with the mode that the two wire winding shafts are arranged in sequence in the axial direction of the delivery sleeve, the space occupation in the axial direction of the delivery sleeve is smaller, and the internal space of the delivery sleeve is reasonably utilized to transmit the power of the handle output shaft in the limited internal space of the delivery sleeve.

[0023] Preferably, the three channels are arranged in the delivery sleeve in the shape of "pin" and are spaced apart from each other at 0°, 90° and 180° respectively in the radial direction of the delivery sleeve, and the four transmission members are arranged at 45° around the center of the delivery sleeve respectively.

[0024] In the scheme, by the above arrangement, the number of channels is increased and arranged staggered with the transmission members, so that the internal space of the delivery sleeve is reasonably utilized, and the increase of the number of channels can meet the requirements of endoscopic surgery without increasing the diameter of the delivery sleeve.

[0025] Preferably, the three channels are arranged in the delivery sleeve in the shape of "pin" and are spaced apart from each other at 0°, 90° and 180° respectively in the radial direction of the delivery sleeve, and the four transmission members are arranged at 45° around the center of the delivery sleeve respectively.

[0026] In the present scheme, the channels are arranged in a "pin" shape, so that the number of channels that can be accommodated in the same size of the delivery sleeve is increased to meet the needs of different instruments and visual probes inserted into each channel during endoscopic surgery. It can be understood that the channels arranged in a "pin" shape occupy the position of the transmission member that drives the movement of the second end of the delivery sleeve, and the transmission member is offset by 45° and driven by the motor and output shaft. Compared with the traditional transmission member arranged in the orthogonal direction (vertical and horizontal direction), the channel arrangement can be avoided in the same size of the delivery sleeve, and the single transmission member transmission problem caused by the oblique arrangement of the transmission member can be solved by the motor and output shaft. When the operator drives to one side, the motor and the two output shafts on the corresponding side can move simultaneously to realize the movement of the delivery sleeve to one side. So that each movement direction has a separate mapping relationship, corresponding to different motor rotation directions, which can improve user experience. And in the vertical and horizontal direction, the pitch and yaw are the same as the conventional endoscopic movement method, which meets the needs of endoscopic surgery.

[0027] Preferably, the number of channels is four, and the four channels are arranged in a "diamond" shape in the delivery sleeve;

[0028] Or the number of channels is five, wherein four of the channels are arranged in a "diamond" shape in the delivery sleeve, and the other channel is coaxially arranged with the center axis of the delivery sleeve between the four channels, wherein the entrances of three of the channels are at a first distance from the first end of the delivery sleeve, the entrances of the remaining two of the channels are at a second distance from the first end of the delivery sleeve, the first distance is greater than the second distance, and the five channels are offset from the transmission member.

[0029] In the present scheme, by the above-mentioned arrangement, the number of channels in the same size of the delivery sleeve is increased, and the second end of the delivery sleeve can move normally. And the entrances of three channels are arranged at a first distance from the first end of the delivery sleeve, and the entrances of the remaining two channels are arranged at a second distance from the first end of the delivery sleeve, so as to arrange the entrances of the channels on each side of the outer surface of the delivery sleeve respectively, and ensure the interval arrangement of the channel entrances to prevent interference.

[0030] Preferably, the handle further comprises a rocker mechanism, and the rocker mechanism is connected with the drive unit through an encoder.

[0031] In the present scheme, the rocker mechanism is provided to replace the two dials to adjust the movement of the second end of the delivery sleeve, which has higher precision and can be operated with one hand, without the need to adjust the movement of the delivery sleeve, which can avoid the situation that the delivery sleeve deviates from the target position due to the accidental touch of a dial during stacking.

[0032] Preferably, the endoscopic surgical outer sleeve further comprises a sterile adapter arranged at the connection between the handle and the delivery sleeve.

[0033] In the present solution, the sterile adapter is arranged to prevent further transmission of bacteria on the delivery sleeve to the handle in the case of detachable connection between the delivery sleeve and the handle. Since the handle is driven by a motor, its service life is longer than that of the delivery sleeve which is sterilized multiple times and discarded after a certain number of uses. Thus, the sterile adapter protects the handle, guarantees its service life, and reduces the use cost of the outer sleeve.

[0034] The positive progress effect of the present application is that: the present application sets the transmission assembly, and sets the transmission parts of the transmission assembly in the upper half region and the lower half region of the delivery sleeve, and arranges four transmission pieces in the transmission holes of different heights in the same region corresponding to the upper half region and the lower half region of the delivery sleeve, so as to realize the linkage between the output shaft and the handle in a limited space, and then realize the movement of the second end of the delivery sleeve driven by the handle. In addition, the transmission pieces arranged in transmission holes of different heights can effectively prevent the mutual interference between the transmission pieces in the delivery sleeve. Further, the delivery sleeve is provided with a channel in addition to the transmission assembly for driving the second end of the delivery sleeve to move, and the channel is used for accommodating instruments, and the channel and the transmission pieces are arranged staggered, that is, in addition to arranging four transmission pieces in a limited space, the instruments can also be inserted into the delivery sleeve, and the two do not interfere with each other, and the space in the delivery sleeve is reasonably utilized. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 is a perspective view of an endoscopic surgical outer sleeve according to a preferred embodiment of the present application.

[0036] Fig. 2 is a view showing the positional relationship between the inner wall and the cavity of a delivery sleeve according to a preferred embodiment of the present application.

[0037] Fig. 3 is a top view of an adapter assembly according to a preferred embodiment of the present application.

[0038] Fig. 4 is a perspective view of an adapter assembly according to a preferred embodiment of the present application.

[0039] Fig. 5 is an enlarged view of part A in Fig. 4.

[0040] Fig. 6 is a schematic view showing the structure of a wire winding shaft according to a preferred embodiment of the present application.

[0041] Fig. 7 is a view showing the positional relationship between a wire winding wheel and a wire winding shaft according to a preferred embodiment of the present application.

[0042] Fig. 8 is a view showing the positional relationship between two wire winding wheels on the same wire winding shaft according to a preferred embodiment of the present application.

[0043] Fig. 9 is a view showing the positional relationship between a limiting plate and a wire winding shaft according to a preferred embodiment of the present application.

[0044] Fig. 10 is a diagram showing the positional relationship between the passive adapter and the handle of a preferred embodiment of the present application.

[0045] Fig. 11 is a diagram showing the positional relationship between the transmission members in the upper half region of the delivery sleeve and the transmission holes of different heights.

[0046] Legend: endoscope surgery outer sleeve 100 delivery sleeve 10 handle 20 driving unit 21 motor 211 rocker mechanism 22 channel 1 transmission assembly 2 transmission part 23 transmission hole 231 transmission member 24 adapter 7 DETAILED DESCRIPTION

[0047] The present application will be further described in the following examples, but the present application is not limited to the examples.

[0048] The present embodiment provides an endoscope surgery outer sleeve 100, the specific structure of which is shown in Figs. 1, 2, 10 and 11. The endoscope surgery outer sleeve 100 comprises a delivery sleeve 10 and a handle 20 connected to the first end of the delivery sleeve 10. The endoscope surgery outer sleeve 100 further comprises:

[0049] The transmission assembly 2 is provided with four transmission assemblies 2. Each transmission assembly 2 comprises a transmission part 23 and a transmission member 24. The transmission member 24 extends from the first end of the delivery sleeve 10 to the second end of the delivery sleeve 10. The transmission part 23 is provided with transmission holes 231 spaced apart in the height direction. Two transmission parts 23 are located in the upper half region of the delivery sleeve 10, and two transmission members 24 are respectively arranged in the two transmission parts 23 and located in the transmission holes 231 of different heights. The remaining two transmission parts 23 are located in the lower half region of the delivery sleeve 10, and two transmission members 24 are respectively arranged in the two transmission parts 23 and located in the transmission holes 231 of different heights.

[0050] The transmission parts 23 located in the upper half region of the delivery sleeve 10 and the lower half region of the delivery sleeve 10 are arranged in staggered manner in the height projection direction of the transmission parts 23.

[0051] The channel 1 is used to accommodate instruments. The inlet of the channel 1 is arranged close to the first end of the delivery sleeve 10 and located on the outer surface of the delivery sleeve 10. The part of the channel 1 extending into the delivery sleeve 10 is arranged in staggered manner with the four transmission members 24.

[0052] The driving unit 21 is arranged in the handle 20, and the driving unit 21 comprises a motor 211 and two output shafts (not shown in the figure), and two transmission members 24 located in the upper half region and the lower half region of the delivery sleeve 10 are connected on the same output shaft.

[0053] Specifically, the delivery sleeve 10 is a cylindrical structure and has a space formed inside for accommodating the transmission assembly 2 and the channel 1, the channel 1 and the transmission assembly 2 are also cylindrical structures, the channel 1 is used for passing the instruments and visual probes required in endoscopic surgery, the transmission assembly 2 comprises a transmission part 23 and a transmission member 24, the transmission part 23 is provided with a transmission hole 231 in the height direction of the transmission part 23, and the transmission holes 231 on each transmission part 23 are different in height, that is, the transmission holes 231 on each transmission part 23 are located at different heights of the transmission part 23, and the transmission member 24 passes through the transmission hole 231, the transmission member 24 is a steel wire rope in the prior art, and it can be understood that the part of the delivery sleeve 10 close to the second end can move following the contraction of the steel wire rope to meet the needs of position adjustment in endoscopic surgery, which is the prior art and will not be described in detail here. In this embodiment, the space inside the delivery sleeve 10 is divided into an upper half region and a lower half region according to the thickness direction, each of the four transmission assemblies comprises a transmission part 23 and a transmission member 24, that is, the number of transmission parts 23 and transmission members 24 is four, two of the four transmission parts 23 are located in the upper half region of the delivery sleeve 10, and the other two are located in the lower half region of the delivery sleeve 10, and the four transmission members 24 pass through the four transmission parts 23 in sequence, when the two transmission members 24 located in the upper half region of the delivery sleeve 10 pass through the transmission part 23, they are located in the transmission holes 231 at different heights of the transmission part 23 respectively, and similarly, the two transmission members 24 located in the lower half region of the delivery sleeve 10 are located in the transmission holes 231 at different heights, so as to realize the staggered arrangement of the transmission members 24 in the limited internal space of the delivery sleeve 10, and prevent the winding or interference that may occur when multiple transmission members 24 are located on the same horizontal plane.

[0054] In addition, in this embodiment, the four transmission parts 23 are arranged in a staggered manner in the projection direction of their own height, that is, the two transmission parts 23 located in the upper half region of the delivery sleeve 10 do not correspond to the two transmission parts 23 located in the lower half region of the delivery sleeve 10, and are arranged in a staggered manner, so that the path of the pair of transmission members 24 located in the upper half region of the delivery sleeve 10 and the path of the pair of transmission members 24 located in the lower half region of the delivery sleeve 10 are parallel along the axial direction of the delivery sleeve 10; and the deflection angles of the transmission members 24 extending into the delivery sleeve 10 through the transmission part 23 are equal. No additional friction is introduced. It is convenient for the control calculation of the motor.

[0055] In the embodiment, the channel 1 is arranged in the conveying sleeve 10, and a part of the channel 1 is arranged in a staggered manner with the four transmission members 24. On the basis of the staggered arrangement of the four transmission members 24 and the four transmission parts 23, the transmission problem of the conveying sleeve 10 is effectively solved in the limited internal space of the conveying sleeve 10. When the plurality of instruments are extended into the conveying sleeve 10 through the channel 1, the plurality of instruments are kept in a staggered manner with the transmission assembly 2, interference between the plurality of instruments and the transmission assembly 2 is avoided, and the space in the conveying sleeve 10 is reasonably utilized.

[0056] In the embodiment, the driving unit 21 includes a motor 211 and two output shafts. The motor 211 is a servo motor in the prior art. The output shafts are connected with the motor 211 and extend towards the conveying sleeve 10. Two transmission assemblies 2 are connected on the same output shaft, so that the transmission assemblies 2 are driven by the motor 211 and the output shafts when the transmission assemblies 2 are arranged in a staggered manner. Compared with the driving mode in which a chain is separately connected by a connecting rod structure in the conventional handle 20, when an operator drives to one side, the motor 211 and the two output shafts on the corresponding side can simultaneously move, so that the conveying sleeve 10 moves to one side. In each movement direction, there is a separate mapping relationship, and the corresponding motor 211 rotating direction can improve the user experience. In addition, in the vertical and horizontal directions, the pitching and yawing are the same as the movement mode of a conventional endoscope, and the needs of endoscopic surgery are met. The problem that the conveying sleeve 10 is obliquely rotated when a single transmission assembly 2 is driven is solved.

[0057] In other embodiments, a plurality of transmission holes 231 can be arranged, and the transmission members 24 are arranged in different transmission holes 231 in the height direction of the transmission part 23.

[0058] As shown in FIGS. 3, 4 and 5, further, in the embodiment, the endoscopic surgery outer sleeve 100 further includes an adapter assembly 3. The adapter assembly 3 is arranged between the transmission assembly 2 and the driving unit 21 in the radial direction of the conveying sleeve 10. The second end of the conveying sleeve 10 is connected with the driving unit 21 through the adapter assembly 3 and the transmission assembly 2.

[0059] Specifically, the adapter assembly 3 is arranged in the conveying sleeve 10 and close to the end where the conveying sleeve 10 is connected with the handle 20, and the adapter assembly 3 is arranged in the radial direction of the conveying sleeve 10. Compared with being arranged in the length direction of the conveying sleeve 10, being arranged in the radial direction can realize the connection between the driving unit 21 and the transmission assembly 2 in the limited space in the conveying sleeve 10 and occupies less space in the conveying sleeve 10, especially in the length direction of the conveying sleeve 10, so that the conveying sleeve 10 can be arranged with other structures in the length direction, improving the space utilization. It can be understood that the adapter assembly 3 in the embodiment connects the steel wire in the transmission assembly 2 with the output shaft of the driving unit 21, so as to realize the movement of the second end of the conveying sleeve 10 by operating the handle 20 after the handle 20 is connected with the conveying sleeve 10.

[0060] In the embodiment, the adapter plate 31 is arranged in the conveying sleeve 10 in the horizontal direction, and the adapter assembly 3 comprises the wire winding shaft 32 arranged in the radial direction of the conveying sleeve 10, which is rotationally connected to the adapter plate 31. The transmission part 23 is arranged corresponding to the wire winding shaft 32, and the transmission hole 231 on the transmission part 23 comprises a first section parallel to the axial direction of the conveying sleeve 10 and a second section arranged at an angle of 0-40° with the axial direction of the conveying sleeve 10.

[0061] Specifically, the adapter plate 31 is a planar plate and is arranged in the axial direction of the conveying sleeve 10, and the wire winding shaft 32 is arranged on the adapter plate 31 in the radial direction of the conveying sleeve 10. The transmission part 24 is wound around the wire winding shaft 32 from the output shaft of the driving unit 21 and changes the extension direction, extending towards the length direction of the conveying sleeve 10. Further, the wire winding shaft 32 is rotationally connected with the wire winding wheel 321, and the transmission part 24 is wound around the wire winding wheel 321 and changes the extension direction through the wire winding wheel 321.

[0062] It should be noted that, since the transmission member 24 needs to have a certain torque, which is determined by the large pulling force requirement on the transmission member 24 and the limited torque provided by the motor 211, a suitable wire winding wheel 321 diameter is required, and the inner mirror surgery overtube 100 is designed to be separate from the handle 20 and the delivery overtube 10, which has the possibility of quick disassembly during use. The only corresponding position needs to be disassembled and assembled, so the design stroke of the wire winding wheel 321 is less than plus or minus 180 degrees. According to the diameter of the delivery overtube 10 and the maximum bending radius of the delivery overtube 10 design, a suitable wire winding wheel 321 diameter is designed. And in the corresponding handle 20 part, the motor 211 selects a suitable diameter and matching output torque. When the torque provided by the motor 211 is much larger than the torque provided by the wire winding wheel 321 diameter to the transmission member 24, the space of the handle 20 is wasted to a certain extent. On the basis of limited space of the handle 20, the transmission member 24 needs to be switched under the condition of ensuring that the channel 1 occupies the space in the delivery overtube 10. At the same time, the diameter of the wire winding wheel 321 needs to meet the turning radius of the selected transmission member 24. The more strands and the larger the diameter of the transmission member 24, the smaller the deformation of the length of the transmission member 24 under the design tension, which is more conducive to error control. Therefore, theoretically, the larger the wire winding wheel 321, the better, and the thicker the transmission member 24, the better, but limited by the space of the handle 20, the above-mentioned angle is designed. And, because the wire winding wheel 321 is large in diameter, the transmission hole 231 on the transmission part 23 is arranged at an angle of 0-40° along the axial direction of the delivery overtube 10.

[0063] In the embodiment, the bending movement of the second end of the delivery overtube 10 is driven by a higher tension, and due to the limited internal space of the delivery overtube 10, the torque of the transmission member 24 is realized, so the second section in the transmission hole 231 is set to the above-mentioned angle to guide the transmission member 24. It can be understood that the second section is close to the wire winding shaft 32, and the first section is arranged away from the wire winding shaft 32, and the transmission member 24 keeps the part between the transmission part 23 and the wire winding shaft 32 at the above-mentioned angle through the second section, effectively switching the power of the handle 20, and at the same time, the transmission member 24 has a torque that meets the requirements, effectively driving the movement of the second end of the delivery overtube 10. In addition, the transmission hole 231 with the above-mentioned angle enables the transmission member 24 to avoid interference with other transmission members 24 under the limited internal space of the delivery overtube 10.

[0064] As shown in FIGS. 4 and 5, in the embodiment, the transmission part 23 located in the upper half region of the delivery overtube 10 is arranged towards the axial direction of the delivery overtube 10, and the transmission part 23 located in the lower half region of the delivery overtube 10 is arranged outward from the axial direction of the delivery overtube 10.

[0065] The transmission part 23 located in the upper half region of the delivery sleeve 10 is arranged towards the axial direction of the delivery sleeve 10 and forms an angle of 0-40° with the axial direction of the delivery sleeve 10, and the transmission part 23 located in the lower half region of the delivery sleeve 10 is arranged outward from the axial direction of the delivery sleeve 10 and forms an angle of 0-40° with the axial direction of the delivery sleeve 10, so as to ensure that the transmission member 24 is arranged in the same direction as the wire winding shaft 32 and the transmission part 23, and the transmission members 24 arranged on the transmission parts 23 in different regions are arranged staggered with each other to avoid interference.

[0066] In the embodiment, the spring pipes 331 are arranged in the transmission holes 231, the transmission member 24 is arranged in the spring pipes 331 and extends towards the second end of the delivery sleeve 10, and the spring pipes 331 extend from the transmission holes 231 to the second end of the delivery sleeve 10. The number of the spring pipes 331 is also four, and the part of the spring pipes 331 arranged in the transmission holes 231 is guided by the transmission holes 231 and wraps the transmission member 24 outward through the spring pipes 331. The spring pipes 331 with smaller and thinner structure are convenient to be arranged in the inner space of the delivery sleeve 10, the pulley or bearing is omitted, and the friction force of the transmission member 24 at the transmission part 23 is reduced.

[0067] In the embodiment, the platform 33 is arranged in the delivery sleeve 10, the platform 33 is a flat plate and is arranged along the axial direction of the delivery sleeve 10, the platform 33 is arranged towards the adapter plate 31, the transmission part 23 is connected by arranging external threads on the outer surface and screwing with the threaded holes on the platform 33, and the wire winding shaft 32 and the transmission part 23 are matched to make the transmission member 24 rotate to the required angle. As shown in FIGS. 6, 7, 8 and 9, in the embodiment, the wire winding shaft 32 is arranged with two, each wire winding shaft 32 is arranged with two wire winding wheels 321, and the two wire winding wheels 321 arranged on the same wire winding shaft 32 are connected with the two transmission members 24 respectively, one of the two transmission members 24 is located in the upper half region of the delivery sleeve 10, the other is located in the lower half region of the delivery sleeve 10, and the two transmission members 24 are located in the left half region and the right half region of the delivery sleeve 10 respectively. In the embodiment, the wire winding wheel 321 is a disc structure and is arranged with a receiving groove, and the transmission member 24 is wound in the receiving groove.

[0068] Specifically, two of the four transmission members 24 are arranged in the left half region and the right half region of the delivery cannula 10 respectively, and are located in the upper half region and the lower half region respectively, that is, the two transmission members 24 arranged staggered are connected to two wire winding wheels 321 on the same wire winding wheel shaft 32, and the two wire winding wheels 321 are arranged in sequence along the axial direction of the wire winding wheel shaft 32. By connecting the two transmission members 24 located in different regions to the same wire winding wheel shaft 32, on the one hand, the torque requirement of the transmission member 24 is met, and on the other hand, the transmission members 24 located in different regions can be reasonably arranged in the limited space of the delivery cannula 10 and interference is prevented.

[0069] It can be understood that the paths of the pair of transmission members 24 located in the upper half region of the delivery cannula 10 and the paths of the pair of transmission members 24 located in the lower half region of the delivery cannula 10 are tangent to and parallel to the wire winding wheels 321; the wire winding lengths and states on the wire winding wheels 321 are equal, and the deflection angles and paths are equal. No additional friction is introduced. It is convenient for the control calculation of the motor.

[0070] The working principle is as follows: when the wire winding wheel shaft 32 rotates clockwise from the top view, the transmission member 24 located at the top of the platform 33 is stretched, and the transmission member 24 located at the bottom of the platform 33 is relaxed and extended. From the horizontal direction, the second end of the delivery cannula 10 naturally tilts upward to the right. Similarly, when counterclockwise rotation, the transmission member 24 located at the bottom of the platform 33 is stretched, and the transmission member 24 located at the top of the platform 33 is relaxed, and the second end of the delivery cannula 10 naturally tilts downward to the left. The other side wire winding wheel shaft 32 is the same, and will not be described in detail here. When the operator needs to realize the pitching and yawing of the second end of the delivery cannula 10 in the orthogonal direction, that is, in the vertical and horizontal directions, the two sides wire winding wheel shaft 32 will be rotated at the same stroke at the same time to meet the needs of endoscopic surgery.

[0071] Further, the two wire winding wheel shafts 32 are arranged side by side along the radial direction of the delivery cannula 10. Compared with the mode that the two wire winding wheel shafts 32 are arranged in sequence along the axial direction of the delivery cannula 10, the space occupation in the axial direction of the delivery cannula 10 is smaller, and the internal space of the delivery cannula 10 is reasonably utilized to transmit the power of the handle 20 output shaft in the limited internal space of the delivery cannula 10.

[0072] In the embodiment, a limiting plate 4 is arranged between the two adjacent wire winding wheel shafts 32. It can be understood that the limiting plate 4 is used to limit the steel wire rope on the wire winding wheel 321 to prevent the steel wire rope from loosening or falling off from the containing groove, and the side of the limiting plate 4 facing the wire winding wheel 321 is arc-shaped to improve the limiting effect on the steel wire rope on the wire winding wheel 321, and the wire falling phenomenon is not easy to occur.

[0073] In the embodiment, the adapter assembly 3 further comprises a housing 34, which is arranged on the winding wheel shaft 32 and is in sealed connection with the delivery sleeve 10. The winding wheel shaft 32 is provided with a groove near the end, and a sealing ring is arranged in the groove to maintain the sealing of the delivery sleeve 10 as a whole when connected with the housing 34.

[0074] In the embodiment, three channels 1 are provided, and the inlets of the three channels 1 are located at different sides of the outer surface of the delivery sleeve 10. The portions of the three channels 1 extending into the delivery sleeve 10 are arranged staggered with the four transmission members 24. Compared with the case where the number of channels 1 is one or two, the number of channels 1 is increased and arranged staggered with the transmission members 24, which makes rational use of the internal space of the delivery sleeve 10, and the increase of the number of channels 1 can meet the needs of endoscopic surgery without increasing the diameter of the delivery sleeve 10.

[0075] Meanwhile, the three channels 1 are arranged in a “pin” shape in the delivery sleeve 10, and the three channels 1 arranged in a “pin” shape are arranged at intervals from the zero position of the radial direction of the delivery sleeve 10, at 90° and at 180° with the zero position, respectively. The four transmission members 24 are arranged at intervals of 45° around the axis of the delivery sleeve 10 from the positions of the channels 1.

[0076] Specifically, the channels 1 are arranged in a “pin” shape, one of the channels 1 is located above the other two channels 1, and the line connecting the axis of the channel 1 and the axis of the delivery sleeve 10 is arranged in the vertical direction. The other two channels 1 are arranged side by side in the horizontal direction, and the outer surface of the channel 1 is in contact with the inner wall of the delivery sleeve 10 to replace the transmission member 24 originally arranged in the vertical direction. It should be noted that the vertical direction and the horizontal direction mentioned in the embodiment are explained with respect to the extension of the vertical direction and the horizontal direction perpendicular to the vertical direction from the axis of the delivery sleeve 10 under the condition that the delivery sleeve 10 is fixed, to explain the positions of the channels 1 and the transmission assembly 2.

[0077] In the embodiment, the transmission member 24 is arranged at an angle of 45° with respect to the vertical direction, i.e. at an angle of 45° around the axis of the delivery sleeve 10 from the position of the channel 1, to avoid the channels 1 arranged in a “pin” shape. Compared with the conventional arrangement of the four transmission members 24 along the vertical direction and the extension of the horizontal direction perpendicular to the vertical direction from the axis of the delivery sleeve 10, the arrangement of the transmission member 24 is more reasonable in terms of the space arrangement in the delivery sleeve 10, so that the number of channels 1 in the delivery sleeve 10, which can only be arranged obliquely in one or two channels 1, is increased to three channels 1 arranged in a “pin” shape, to meet the needs of inserting different instruments and visual probes into each cavity in endoscopic surgery.

[0078] In addition, since the original handle 20 adopts the mode of two dials stacked to rotate to adjust the chain to drive the second end of the conveying sleeve 10 to move, four chains have to be arranged in the vertical and horizontal directions to avoid the problem of large transmission error in the case of offset arrangement of the chains. In the embodiment, the steel wire rope is used to replace the chain, which can improve the transmission efficiency and accuracy on the one hand, and the steel wire rope can be pulled tight and offset to meet the arrangement requirements of the cavity 1.

[0079] In the embodiment, the number of channels 1 is four, and the four channels 1 are arranged in a "diamond" shape in the conveying sleeve 10. Among them, three channels 1 are still arranged in a "pin" shape and have the same size, and the remaining one channel 1 is located below the "pin" shape, and the size of the channel 1 is smaller than that of the three channels 1 arranged in a "pin" shape under the condition that the diameter of the conveying sleeve 10 remains unchanged. For the channel 1 with smaller size, it can be correspondingly inserted into the instrument with smaller size to increase the number of channels 1 in the conveying sleeve 10 with the same size, and the offset arrangement of each transmission assembly 2 will not interfere with the four channels 1, and the second end of the conveying sleeve 10 can move normally.

[0080] In another embodiment, the number of channels 1 is five, wherein four channels 1 are arranged in a "diamond" shape in the conveying sleeve 10, and the other channel 1 is arranged coaxially with the axis of the conveying sleeve 10. By using the surrounding mode of multiple channels 1, the number of channels 1 is further increased. It can be understood that the size of the channel 1 arranged coaxially with the axis of the conveying sleeve 10 is smaller than that of the other four channels 1 to meet the use requirements of multiple instruments in endoscopic surgery.

[0081] In the embodiment, the entrances of the three channels 1 are at a first distance from the first end of the conveying sleeve 10, and the entrances of the remaining two channels 1 are at a second distance from the first end of the conveying sleeve 10. The first distance is greater than the second distance, and the five channels 1 are arranged offset from the transmission member 24.

[0082] Specifically, the entrances of the three channels 1 on the conveying sleeve 10 are the first interfaces 5, and the entrances of the remaining two channels 1 are the second interfaces 6. The first interfaces 5 are in communication with the three channels 1 arranged in a "pin" shape, the second interfaces 6 are in communication with the other two channels 1, the second interfaces 6 are arranged close to the first end of the conveying sleeve 10, and the second interfaces 6 are arranged spaced apart from the first interfaces 5.

[0083] It can be understood that the delivery sleeve 10 includes a second end in a cylindrical structure and a first end in a conical structure, the delivery sleeve 10 has a length of 120 mm and a diameter of φ30 mm, the first interfaces 5 are located in different directions of the conical structure, and the channels 1 arranged in a “pin” shape are taken as an example for description, two of the three first interfaces 5 are located on opposite sides of the delivery sleeve 10 and are arranged in a horizontal direction, and the other first interface 5 is located above the two interfaces. The second interface 6 is in communication with the remaining two channels 1 with smaller sizes through the shell 34, and the first interface 5 and the second interface 6 are arranged in a spaced manner along the length direction of the delivery sleeve 10 to avoid interference with the first interface. By arranging a plurality of interfaces in the limited peripheral side space of the delivery sleeve 10, the instrument can be extended into the delivery sleeve 10.

[0084] In the embodiment, the handle 20 further includes a rocker mechanism 22, and the rocker mechanism 22 is connected with the driving unit 21 through an encoder (not shown in the figure).

[0085] Specifically, the rocker mechanism 22 is electrically connected with the control board, and the rocker mechanism 22 is a Hall rocker in the prior art. It can be understood that the rocker mechanism 22 completes the operation gesture of adjusting the end of the outer sleeve 2 by transmitting a signal to the control board, and the signal transmission mode is in the prior art. The signal logic is not improved in the embodiment. By the mode that the rocker mechanism 22 drives the movement of the delivery sleeve 10, compared with the traditional mode that two dials are stacked for input, the rocker mechanism 22 does not need to manipulate different dials in two steps, which prevents the change of the input position of a dial from being caused by mistake, reduces the operation difficulty of the handle 20, and simultaneously, compared with the input mode of two dials, the rocker mechanism 22 does not need to be locked and unlocked before the next adjustment of the dial, and only needs to be rotated by the operator to realize the position input of two dials, so that it is no longer necessary to stack the movement in two directions to reach the target area, and the repeated operation is not easy to cause fatigue.

[0086] It should be noted that the connection between the handle 20 and the rocker mechanism 22 is provided with an encoder. It can be understood that the signal input by the rotation of the rocker mechanism 22 needs to be encoded by the encoder, so as to be effectively recognized by the handle 20, and the offset angle of the rocker mechanism 22 is converted into a signal that can be recognized by the handle 20. Meanwhile, the existence of the encoder makes the signal input to the handle 20 more accurate, and compared with the mode that the multi-link structure drives the input to the handle 20, the second end of the delivery sleeve 10 can be more precisely driven.

[0087] In the embodiment, the motor 211 is provided with at least two, and the driving unit 21 further includes a speed reducer (not shown in the figure), and the speed reducer is arranged in series with the motor 211.

[0088] Specifically, the speed reducer is arranged between the motor 211 and the output shaft. When the motor 211 receives the signal from the rocker mechanism 22 through the control board and the encoder, the motor 211 rotates and drives the output shaft to rotate. At the same time, according to the deflection angle of the rocker mechanism 22, the control board is connected to the motor 211 to rotate, thereby driving the second end of the delivery cannula 10 to move. The delivery cannula 10 can swing up and down and left and right on the rocker mechanism 22, which is more humanized. The speed reducer is a speed reducer structure in the prior art, which will not be described in detail here.

[0089] In this embodiment, the encoder is an encoder read head and an encoder magnetic ring structure to realize smooth reading and writing of signals, input and output signals, which are prior art and will not be described in detail here.

[0090] In other embodiments, the drive unit 21 is further provided with a brake (not shown in the figure) on the side. The brake is a brake structure in the prior art for locking the output shaft, so that the output shaft is locked by the brake after the second end of the delivery cannula 10 reaches the target area, keeping the position of the second end of the delivery cannula 10 unchanged.

[0091] In this embodiment, the rocker mechanism 22 is further provided with a button (not shown in the figure), which is electrically connected with the control board (not shown in the figure). The delivery cannula 10 performs one or more functions of suction, air supply, flushing, image screenshot and image freezing through the button. It can be understood that the button sends signals to the control board, and the control board transmits the signals to the corresponding function area of the second end of the delivery cannula 10 to realize the above functions. In this embodiment, the signal transmission between the button and the control board belongs to the prior art, and the transmission logic is not changed, which will not be described in detail here. By setting the button to integrate the functions, the integration of the handle 20 is improved, and the operator can realize multiple functions of the handle 20 with one hand.

[0092] As shown in FIG. 10, in this embodiment, the endoscope surgery outer cannula 100 further comprises a sterile adapter 7 arranged at the connection between the handle 20 and the delivery cannula 10.

[0093] Specifically, the sterile adapter 7 is a plate and is arranged on the handle 20 by clamping connection. The edge of the sterile adapter 7 is used to cooperate with the "L"-shaped adapter plate 31. The sterile adapter 7 is a structure for blocking bacteria in the prior art, which will not be described in detail here. By arranging the sterile adapter 7, in the case of detachable connection between the delivery cannula 10 and the handle 20, the bacteria on the delivery cannula 10 is prevented from further transmitting to the handle 20. Since the handle 20 is driven by a motor, its service life is longer than that of the delivery cannula 10 which is scrapped after a certain number of disinfections and uses. Therefore, the sterile adapter 7 protects the handle 20, guarantees the service life of the handle 20, and reduces the use cost of the endoscope surgery outer cannula 100.

[0094] Although the specific embodiments of the present application have been described above, it is understood by those skilled in the art that the present application is only illustrative, and the scope of protection of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and the essence of the present application, and such changes and modifications fall within the scope of protection of the present application.

Claims

1. An endoscopic surgical overtube comprising a delivery overtube and a handle connected to a first end of the delivery overtube, wherein, The endoscopic surgery sleeve further comprises: The transmission assembly is provided with four, each of the transmission assembly comprises a transmission part and a transmission part, the transmission part extends from the first end of the delivery sleeve to the second end of the delivery sleeve, the transmission part is provided with a transmission hole along the height direction, and the transmission hole on each of the transmission part is different, wherein two of the transmission part is located in the upper half of the delivery sleeve, two of the transmission part is respectively arranged on two of the transmission part and located in the transmission hole with different height; the remaining two of the transmission part is located in the lower half of the delivery sleeve, two of the transmission part is respectively arranged on two of the transmission part and located in the transmission hole with different height; the transmission part located in the upper half of the delivery sleeve and the lower half of the delivery sleeve is staggered along the height projection direction of the transmission part; The channel is used to accommodate the instrument, the inlet of the channel is close to the first end of the delivery sleeve, and is located on the outer surface of the delivery sleeve, the part of the channel extending into the delivery sleeve is staggered with the four transmission parts; The driving unit is provided in the handle, the driving unit comprises a motor and two output shafts, the same output shaft is connected with two transmission parts located in the upper half and lower half of the delivery sleeve.

2. The endoscopic surgical sheath of claim 1, wherein, The endoscopic surgery sleeve further comprises an adapter assembly, the adapter assembly is arranged between the transmission assembly and the driving unit along the radial direction of the delivery sleeve, the second end of the delivery sleeve is connected with the driving unit through the adapter assembly and the transmission assembly.

3. The endoscopic surgical sheath of claim 2, wherein, The adapter assembly comprises a wire winding shaft arranged along the radial direction of the delivery sleeve, the transmission part is correspondingly arranged with the wire winding shaft, the transmission hole on the transmission part comprises a first segment parallel to the axial direction of the delivery sleeve and a second segment arranged at an angle of 0-40° with the axial direction of the delivery sleeve.

4. The endoscopic surgical sheath of any of claims 1-3, wherein, The transmission part located in the upper half of the delivery sleeve is arranged towards the axial direction of the delivery sleeve, and the transmission part located in the lower half of the delivery sleeve is arranged outward from the axial direction of the delivery sleeve.

5. The endoscopic surgical sheath of claim 3 or 4, wherein, The transmission hole is provided with a spring tube, the transmission part is arranged in the spring tube and extends towards the second end of the delivery sleeve, and the spring tube extends from the transmission hole to the second end of the delivery sleeve.

6. The endoscopic surgical sheath of claim 3, wherein, The wire winding shaft is provided with two, each of the wire winding shaft is provided with two wire winding wheels, two of the wire winding wheels on the same wire winding shaft are respectively connected with two of the transmission parts, wherein one of the two transmission parts is located in the upper half of the delivery sleeve, and the other is located in the lower half of the delivery sleeve, and the two transmission parts are respectively located in the left half and right half of the delivery sleeve; Preferably, the transmission part located in the upper half region of the delivery sleeve is arranged towards the axial direction of the delivery sleeve, and the transmission part located in the lower half region of the delivery sleeve is arranged outward from the axial direction of the delivery sleeve; and / or, a spring tube is arranged in the transmission hole, the transmission member is arranged in the spring tube and extends towards the second end of the delivery sleeve, and the spring tube extends from the transmission hole to the second end of the delivery sleeve.

7. [Amended according to Rule 26 06.08.2025] The endoscopic surgical sleeve of claim 6, wherein, The two wire winding wheel shafts are arranged side by side in the radial direction of the delivery sleeve.

8. [Amended according to Rule 26 06.08.2025] The endoscopic surgical sheath of any one of claims 1-7, wherein, The three channels are arranged in the "pin" shape in the delivery sleeve, and the three channels arranged in the "pin" shape are arranged at intervals in the directions of zero, 90° and 180° of the radial direction of the delivery sleeve, respectively, and the four transmission members are arranged at intervals of 45° around the center of the delivery sleeve from the positions of the channels.

9. The endoscopic surgical sheath of claim 8, wherein, The number of the channels is four, and the four channels are arranged in the "diamond" shape in the delivery sleeve.

10. The endoscopic surgical sheath of any one of claims 1-7, wherein, Or the number of the channels is five, wherein the four channels are arranged in the "diamond" shape in the delivery sleeve, and the other channel is arranged coaxially with the center of the delivery sleeve between the four channels, the entrances of three of the channels are at a first distance from the first end of the delivery sleeve, the entrances of the remaining two channels are at a second distance from the first end of the delivery sleeve, the first distance is greater than the second distance, and the five channels are arranged at intervals with the transmission members. The handle further comprises a rocker mechanism connected with the driving unit through an encoder.

11. The endoscopic surgical sheath of any one of claims 1-10, wherein, The endoscope surgery outer sleeve further comprises a sterile adapter arranged at the connection between the handle and the delivery sleeve.

12. The endoscopic surgical sheath of any one of claims 1-10, wherein, ​

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