Flexible endoscope conveying device and brain tissue retracting system

Abstract

The invention relates to the technical field of medical instruments, in particular to a soft endoscope conveying device and a brain tissue retractor system.The soft endoscope conveying device comprises a fixing mechanism, a conveying mechanism, a conveying mechanism, a conveying mechanism and a conveying mechanism, the fixing mechanism comprises a fixing seat, and the fixing seat is detachably mounted on an outer sheath tube of a brain tissue retractor; the conveying mechanism comprises two rotating shafts and a guide tube, the two rotating shafts are rotatably arranged on the fixing base side by side, one end of the guide tube is connected with the fixing base, the other end of the guide tube extends into the outer sheath tube and is attached to the inner wall of the outer sheath tube, and a soft endoscope penetrates through the middle of the two rotating shafts and extends into the guide tube; the two rotating shafts can rotate in opposite directions and drive the soft endoscope to move in the guide tube. The flexible endoscope can be fixed and moved in the guiding tube by driving the two rotating shafts to rotate in the opposite directions, meanwhile, the guiding tube is arranged to contain the flexible endoscope, the flexible endoscope can be effectively fixed and limited, and then stable surgical images are obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a soft endoscope delivery device and a brain tissue retraction system. Background Art

[0002] A brain tissue retractor is mainly used to form a working channel for neurosurgery. It usually includes an outer sheath and an inner cannula. The inner cannula generally has a round or pointed head. During the channel establishment process, the outer sheath and the inner cannula are fixed together, and the head of the inner cannula is used to establish a working channel for puncturing the brain tissue. After the working channel is established, the inner cannula is removed and the outer sheath is left behind. The doctor uses the working channel to perform the operation.

[0003] At present, when using an endoscope in conjunction with a brain tissue retractor for surgery, a soft endoscope is often used as an image processing unit. Since the traditional snake-shaped fixing clamp cannot stably fix the soft endoscope, the endoscope will shake in the outer sheath of the retractor, making it difficult to obtain a stable image. In addition, the existing soft endoscope is also difficult to adjust up and down. Summary of the invention

[0004] The purpose of the present invention is to provide a flexible endoscope delivery device and a brain tissue retraction system, which at least solves one of the technical problems existing in the existing brain tissue retractors.

[0005] In order to achieve the above object, the present invention provides a flexible endoscope delivery device, comprising:

[0006] The fixing mechanism comprises a fixing seat, wherein the fixing seat is detachably mounted on an outer sheath of a brain tissue retractor;

[0007] The conveying mechanism includes two rotating shafts and a guide tube. The two rotating shafts are rotatably arranged side by side on the fixed seat. One end of the guide tube is connected to the fixed seat, and the other end extends into the outer sheath tube and fits with the inner wall of the outer sheath tube. A flexible endoscope passes through the middle of the two rotating shafts and extends into the guide tube. The two rotating shafts can rotate in opposite directions and drive the flexible endoscope to move in the guide tube.

[0008] Optionally, the conveying mechanism further includes a transmission component, and the two rotating shafts are driven by the transmission component, and driving one of the rotating shafts to rotate can drive the other rotating shaft to rotate.

[0009] Optionally, the transmission component includes two gears meshing with each other, the gears are arranged in a cavity of the fixing seat, and the two rotating shafts are respectively fixed on the two gears.

[0010] Optionally, two bearings for mounting the two rotating shafts respectively are arranged in the cavity of the fixing seat.

[0011] Optionally, the two rotating shafts are respectively provided with a circle of limiting half grooves along the circumferential direction, and the limiting half grooves on the two rotating shafts together form a limiting groove for the flexible endoscope to pass through.

[0012] Optionally, an adjusting knob is provided at the top end of at least one of the rotating shafts.

[0013] Optionally, a guide seat is further provided on the fixing seat, and the guide seat has a guide hole, and the flexible endoscope extends into the middle of the two rotating shafts through the guide hole.

[0014] Optionally, the fixing mechanism further includes a lock pin and a spring, the lock pin is movably connected to the fixing seat, the lock pin is provided with a mounting groove for mounting the spring, and two ends of the spring are respectively connected to the lock pin and the fixing seat;

[0015] The outer sheath is provided with a first clamping groove and a second clamping groove at two opposite sides thereof, and the two ends of the locking pin are provided with a first clamping portion and a second clamping portion respectively;

[0016] When the locking pin moves to the first predetermined position, the first buckle portion is clamped in the first clamping groove and the second buckle portion is clamped in the second clamping groove, the fixing seat is locked on the outer sheath tube, and the spring is in a compressed state;

[0017] When the locking pin moves to the second predetermined position, the spring is further compressed, the second buckle portion disengages from the second clamping groove, and the fixing seat and the outer sheath are unlocked.

[0018] The flexible endoscope delivery device provided by the present invention has at least one of the following beneficial effects:

[0019] 1) By driving the two rotating shafts to rotate in opposite directions, the flexible endoscope can be fixed and moved in the guide tube. At the same time, by providing a guide tube to accommodate the flexible endoscope, the flexible endoscope can be effectively fixed and limited, and the flexible endoscope is prevented from shaking in the outer sheath, thereby obtaining a stable surgical image and improving the safety of the operation;

[0020] 2) By providing a transmission component, the two rotating shafts can be rotated synchronously and in opposite directions, thereby simplifying the conveying mechanism and improving the synchronization of the two rotating shafts, so as to better drive the flexible endoscope to move;

[0021] 3) By forming a limit groove between the two rotating shafts to cooperate with the flexible endoscope, the flexible endoscope is driven to move while preventing the flexible endoscope from moving around on the rotating shaft;

[0022] 4) The guide seat is provided to limit the position of the flexible endoscope in the radial direction, thereby ensuring that the flexible endoscope can accurately extend into the middle of the two rotating shafts through the guide hole.

[0023] Based on the same inventive concept, the present invention also provides a brain tissue retraction system, including a puncture device and the soft endoscope delivery device as described above, wherein the puncture device includes a matching outer sheath and an inner cannula, and the outer sheath can be detachably connected to either the inner cannula or the soft endoscope delivery device.

[0024] Optionally, the outer sheath includes a tube portion and a handle portion, the flexible endoscope delivery device is installed on the handle portion, a chamfer is provided at the top end of the tube portion, and a guide tube of the flexible endoscope delivery device extends into the tube portion from the chamfer.

[0025] In the brain tissue retraction system provided by the present invention, when the brain tissue retraction system is used to achieve brain tissue retraction and fixation, the inner sleeve can be detachably connected to the outer sheath, and after completion, the inner sleeve can be removed and withdrawn from the outer sheath, and the outer sheath is retained as a surgical channel; when it is necessary to observe the brain tissue with a soft endoscope, the soft endoscope delivery device can be detachably connected to the outer sheath, and the fixation with the outer sheath is achieved through the fixing mechanism of the soft endoscope delivery device, and the position of the soft endoscope in the outer sheath is adjusted through the delivery mechanism. Thus, on the basis of obtaining a better imaging effect, the space of the outer sheath occupied by the soft endoscope is further saved, and more space is reserved for the doctor's surgical operation, thereby improving the utilization rate of the surgical space, achieving minimally invasive surgical treatment, reducing iatrogenic injuries in surgical operations, and improving the safety of surgical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Those skilled in the art should understand that the drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0027] Figure 1 A schematic structural diagram of a flexible endoscope delivery device provided in one embodiment of the present invention;

[0028] Figure 2 A schematic diagram of installing a flexible endoscope delivery device on an outer sheath provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the rotation directions of two rotating shafts provided in one embodiment of the present invention;

[0030] Figure 4 A cross-sectional view of a conveying mechanism provided in one embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the structure of a limit groove provided in one embodiment of the present invention;

[0032] Figure 6 A cross-sectional view of a lock pin provided by an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the structure of a lock pin provided by an embodiment of the present invention;

[0034] Figure 8 A schematic diagram of the structure of an outer sheath tube provided in one embodiment of the present invention;

[0035] Fig. 9 A schematic diagram of a guide tube provided in one embodiment of the present invention;

[0036] Fig.10 A schematic diagram of the connection between an outer sheath tube and an inner sleeve provided in one embodiment of the present invention;

[0037] Fig.11 A schematic diagram of the chamfer of an outer sheath tube provided in one embodiment of the present invention.

[0038] in:

[0039] 10-fixed seat; 11-guide seat; 12-locking pin; 13-spring; 20-outer sheath; 21-tube; 22-handle; 30-rotating shaft; 31-guide tube; 32-gear; 33-bearing; 34-limiting groove; 35-adjusting knob; 40-inner sleeve;

[0040] 101-limiting part; 110-guide hole; 120-installing groove; 121-first snapping part; 122-second snapping part; 123-pressing part; 210-chamfer; 221-first snapping groove; 222-second snapping groove; 223-accommodating groove; 310-endoscope connector; 340-limiting half groove. DETAILED DESCRIPTION

[0041] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and are not in precise proportions. They are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0042] It should also be understood that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish between the various components, elements, steps, etc. in the specification, rather than to represent the logical relationship or sequential relationship between the various components, elements, steps, etc. Moreover, the terms "comprise", "include", or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device including the element.

[0043] Please refer to Figure 1-Figure 2 This embodiment provides a flexible endoscope delivery device, which is applied to a brain tissue retraction system, including:

[0044] The fixing mechanism comprises a fixing seat 10, and the fixing seat 10 is detachably mounted on an outer sheath 20 of a brain tissue retractor;

[0045] The conveying mechanism includes two rotating shafts 30 and a guide tube 31. The two rotating shafts 30 are rotatably arranged side by side on the fixed seat 10. One end of the guide tube 31 is connected to the fixed seat 10, and the other end extends into the outer sheath tube 20 and fits with the inner wall of the outer sheath tube 20. A flexible endoscope passes through the middle of the two rotating shafts 30 and extends into the guide tube 31. The two rotating shafts 30 can rotate in opposite directions and drive the flexible endoscope to move in the guide tube 31.

[0046] By driving the two rotating shafts 30 to rotate in opposite directions, the flexible endoscope can be fixed and moved in the guide tube 31. At the same time, by setting the guide tube 31 to accommodate the flexible endoscope, the flexible endoscope can be effectively fixed and limited, avoiding the flexible endoscope from shaking in the outer sheath 20, thereby obtaining a stable surgical image and improving the safety of the operation.

[0047] Specifically, the conveying mechanism is mainly used to drive the flexible endoscope to move along the axial direction of the outer sheath tube 20. For example, when the outer sheath tube 20 is vertically arranged, the conveying mechanism can drive the flexible endoscope to move up and down.

[0048] Preferably, the conveying mechanism further includes a transmission component, and the two rotating shafts 30 are transmitted through the transmission component, and the other rotating shaft 30 can be driven to rotate by driving one of the rotating shafts 30 to rotate. By setting the transmission component, the two rotating shafts 30 can be rotated synchronously and in opposite directions, thereby simplifying the conveying mechanism while improving the synchronization of the two rotating shafts 30, so as to better drive the flexible endoscope to move. In other words, one of the two rotating shafts 30 is an active rotating shaft, and the other is a driven rotating shaft. When the active rotating shaft rotates, the driven rotating shaft can be driven to rotate through the transmission component, and the rotation directions of the active rotating shaft and the driven rotating shaft are just opposite, thereby realizing the position adjustment of the flexible endoscope.

[0049] For further optimization, please refer to Figure 4 The transmission component includes two mutually meshing gears 32, the gears 32 are arranged in the cavity of the fixed seat 10, and the two rotating shafts 30 are respectively fixed on the two gears 32. By adopting the gear 32 meshing transmission mode, the structure is simple and easy to implement, with good reliability and high transmission efficiency. Of course, in addition to the gear 32 meshing transmission mode, a transmission mode such as a sprocket or a pulley can also be adopted, and this application does not limit this.

[0050] Please continue to refer to Figure 4 Two bearings 33 for respectively mounting the two rotating shafts 30 are also arranged in the cavity of the fixed seat 10. By arranging the bearings 33, the friction between the two rotating shafts 30 and the fixed seat 10 can be reduced when the two rotating shafts 30 rotate, thereby ensuring the transmission accuracy.

[0051] Preferably, please refer to Figure 5 The two rotating shafts 30 are respectively provided with a circle of limiting half grooves 340 along the circumferential direction, and the limiting half grooves 340 on the two rotating shafts 30 together form a limiting groove 34 for the flexible endoscope to pass through. By forming the limiting groove 34 between the two rotating shafts 30 to cooperate with the flexible endoscope, the flexible endoscope is prevented from moving around on the rotating shaft 30 while driving the flexible endoscope to move. It should be understood that the aperture of the limiting groove 34 is slightly smaller than the outer diameter of the flexible endoscope, and the size of the limiting half groove 340 can be designed according to the flexible endoscope to be installed to better fit the flexible endoscope.

[0052] Preferably, at least one of the rotating shafts 30 is provided with an adjusting knob 35 at the top end to facilitate the operation of the doctor. In this embodiment, the adjusting knob 35 is provided at the top end of the active rotating shaft, and the doctor can rotate the adjusting knob 35 with one hand to drive the active rotating shaft to rotate, thereby driving the flexible endoscope to move. In addition, the forward and backward operations can be achieved by adjusting the direction of rotating the adjusting knob 35.

[0053] Preferably, the adjusting knob 35 and the active rotating shaft can be connected by a keyway structure.

[0054] Please continue to refer to Figure 1 A guide seat 11 is also provided on the fixing seat 10, and the guide seat 11 has a guide hole 110, through which the flexible endoscope extends into the middle of the two rotating shafts 30. The guide seat 11 is provided to limit the position of the flexible endoscope in the radial direction, so as to ensure that the flexible endoscope can accurately extend into the middle of the two rotating shafts 30 through the guide hole 110. In this embodiment, the guide hole 110 and the flexible endoscope are clearance-matched, and the flexible endoscope can move forward or backward in the guide hole 110. Preferably, the inner diameter of the guide hole 110 should be set to be 1 mm larger than the size of the flexible endoscope.

[0055] Please continue to refer to Figure 6-Figure 8 , and combined with Figure 2 The fixing mechanism further includes a locking pin 12 and a spring 13. The locking pin 12 is movably connected to the fixing seat 10. The locking pin 12 is provided with a mounting groove 120 for mounting the spring 13. Both ends of the spring 13 are respectively connected to the locking pin 12 and the fixing seat 10.

[0056] The outer sheath tube 20 is provided with a first clamping groove 221 and a second clamping groove 222 at two opposite sides, and the locking pin 12 is provided with a first clamping portion 121 and a second clamping portion 122 at two ends.

[0057] When the locking pin 12 moves to the first predetermined position, the first buckle portion 121 is clamped in the first clamping groove 221 and the second buckle portion 122 is clamped in the second clamping groove 222, the fixing seat 10 is locked on the outer sheath 20, and the spring 13 is in a compressed state;

[0058] When the locking pin 12 moves to the second predetermined position, the spring 13 is further compressed, the first buckle portion 121 is disengaged from the first clamping groove 221 , and the fixing seat 10 and the outer sheath tube 20 are unlocked.

[0059] In this embodiment, one end of the locking pin 12 is a pressing portion 123, and the other end is provided with a first snap portion 121. One end of the fixing seat 10 is provided with a limiting portion 101. In the initial state, the first snap portion 121 abuts against the limiting portion 101. At this time, the spring 13 is in a compressed state, and the locking pin 12, the spring 13 and the fixing seat 10 can be regarded as a whole.

[0060] When the entire flexible endoscope delivery device needs to be installed, the fixing assembly can be moved to the handle of the outer sheath 20. At this time, the pressing portion 123 of the locking pin 12 can be pressed to drive the locking pin 12 to move to the first predetermined position, so that the first buckle portion is clamped in the first clamping groove 221 and the second buckle portion 122 is clamped in the second clamping groove 222, thereby locking the fixing seat 10 on the outer sheath 20. Since the spring 13 is always in a compressed state, the first buckle portion and the first clamping groove 221 and the second buckle portion 122 and the second clamping groove 222 are continuously compressed by providing elastic restoring force, ensuring that the flexible endoscope delivery device will not be separated from the outer sheath 20 in the locked state.

[0061] When the entire flexible endoscope delivery device needs to be disassembled, the pressing portion 123 of the locking pin 12 can be pressed to drive the locking pin 12 to move to the second predetermined position. At this time, the spring 13 is further compressed, and the second snap portion 122 disengages from the second snap groove 222. At this time, the flexible endoscope delivery device can be disengaged from the outer sheath 20 by moving upward to release the lock.

[0062] Please refer to Fig. 9 One end of the guide tube 31 is connected to the fixing seat 10, and the other end extends into the outer sheath tube 20 and fits with the inner wall of the outer sheath tube 20. The guide tube 31 is a hollow structure, and the inside is used to set the soft endoscope, so the inner diameter of the guide tube 31 needs to be larger than the diameter of the soft endoscope. Preferably, the inner diameter of the guide tube 31 is 1 mm larger than the outer diameter of the soft endoscope;

[0063] Preferably, the guide tube 31 is connected to the fixing seat 10 via an endoscope connector 310 , and the inner diameter of the endoscope connector 310 is consistent with the inner diameter of the guide hole 110 .

[0064] Preferably, when the guide tube 31 is inserted into the outer sheath tube 20 , the guide tube 31 is in close contact with the inner wall of the outer sheath tube 20 .

[0065] Preferably, the material of the guide tube 31 should have a certain lubricity, such as PTFE, FEP, or a stainless steel tube with a PTFE coating on the inside.

[0066] Based on this, please refer to Figure 2 and Fig.10 The present invention also provides a brain tissue retraction system, including an outer sheath 20, an inner sheath 40 and the above-mentioned soft endoscope delivery device, wherein the outer sheath 20 can be detachably connected to any one of the inner sheath 40 and the soft endoscope delivery device.

[0067] Specifically, when the brain tissue retraction system is used to achieve brain tissue retraction and fixation, the inner sleeve 40 can be detachably connected to the outer sheath 20. After completion, the inner sleeve 40 can be removed and withdrawn from the outer sheath 20, and the outer sheath 20 can be retained as a surgical channel; when the brain tissue needs to be observed by a soft endoscope, the soft endoscope delivery device can be detachably connected to the outer sheath 20, and the fixation with the outer sheath 20 can be achieved through the fixing mechanism of the soft endoscope delivery device, and the position of the soft endoscope in the outer sheath 20 can be adjusted through the delivery mechanism. In this way, on the basis of obtaining a better imaging effect, the space of the outer sheath 20 occupied by the soft endoscope can be further saved, and more space can be reserved for the doctor's surgical operation, thereby improving the utilization rate of the surgical space, achieving minimally invasive surgical treatment, reducing iatrogenic injuries in surgical operations, and improving the safety of surgical operations.

[0068] Please refer to Figure 8 The outer sheath tube 20 includes a tube portion 21 and a handle portion 22, wherein the tube portion 21 is used to form a surgical working channel, and its interior is used for doctors to perform surgical operations, and the handle portion 22 is used to fix the flexible endoscope delivery device and the inner sleeve 40. The first clamping groove 221 and the second clamping groove 222 are respectively provided on opposite sides of the handle portion 22 of the outer sheath tube 20, and the upper surface of the handle portion 22 is also provided with a receiving groove 223 for installing the delivery mechanism.

[0069] Preferably, the diameter of the tube portion 21 of the outer sheath tube 20 varies, and the overall diameter is larger at the top and smaller at the bottom, that is, the top diameter of the tube portion 21 of the outer sheath tube 20 is larger than the bottom diameter of the tube portion 21. Further preferably, the difference between the top diameter and the bottom diameter of the tube portion 21 of the outer sheath tube 20 is less than or equal to 3 mm.

[0070] Preferably, the wall thickness of the tube portion 21 of the outer sheath tube 20 is less than or equal to 2 mm. Further preferably, the wall thickness of the tube portion 21 of the outer sheath tube 20 is 0.8 mm at the maximum and 0.3 mm at the thinnest.

[0071] Preferably, please refer to Fig.11 The upper opening of the tube portion 21 of the outer sheath tube 20 has a chamfer 210, and the guide tube 31 of the flexible endoscope delivery device extends into the tube portion 21 through the chamfer 210. Preferably, the chamfer 210 is 10° to 30°.

[0072] Preferably, the material of the outer sheath tube 20 is a transparent material, which may be PEEK, PCTG, PETG and PC. More preferably, the material of the outer sheath tube 20 is PC.

[0073] Preferably, a depth scale is provided on the outer wall of the outer sheath tube 20 , and the depth scale can be printed with ink, and the ink should meet the requirements of biocompatibility.

[0074] It should be understood that the inner sleeve 40 also includes a tube portion and a handle portion, the diameter of the tube portion is smaller than the diameter of the tube portion of the outer sheath 20, and the tube portion of the inner sleeve 40 can move within the tube portion 21 of the outer sheath 20. The handle portion of the inner sleeve 40 has the same structure as the fixing mechanism of the flexible endoscope delivery device, so as to be used for the detachable connection between the inner sleeve 40 and the outer sheath 20, which will not be described in detail in this application. It should be understood that in this embodiment, there are two second clamping grooves 222 on the outer sheath 20, one of which is used for detachable connection of the inner sleeve 40, and the other is used for detachable connection of the fixing mechanism of the flexible endoscope delivery device.

[0075] In summary, the present invention provides a flexible endoscope conveying device and a brain tissue retraction system, which can realize the fixation and movement of the flexible endoscope in the guide tube 31 by driving the two rotating shafts 30 to rotate in opposite directions. At the same time, by setting the guide tube 31 to accommodate the flexible endoscope, the flexible endoscope can be effectively fixed and limited, avoiding the flexible endoscope from shaking in the outer sheath 20, thereby obtaining a stable surgical image and improving the safety of the operation.

[0076] In addition, it should be recognized that although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belongs to the scope of protection of the technical solution of the present invention.

Claims

1. A flexible endoscope delivery device, characterized in that: include: The fixing mechanism comprises a fixing seat, wherein the fixing seat is detachably mounted on an outer sheath of a brain tissue retractor; The conveying mechanism includes two rotating shafts and a guide tube. The two rotating shafts are rotatably arranged side by side on the fixed seat. One end of the guide tube is connected to the fixed seat, and the other end extends into the outer sheath tube and fits with the inner wall of the outer sheath tube. A flexible endoscope passes through the middle of the two rotating shafts and extends into the guide tube. The two rotating shafts can rotate in opposite directions and drive the flexible endoscope to move in the guide tube.

2. The flexible endoscope delivery device according to claim 1, characterized in that: The conveying mechanism further comprises a transmission component, and the two rotating shafts are driven by the transmission component, and the other rotating shaft can be driven to rotate by driving one of the rotating shafts to rotate.

3. The flexible endoscope delivery device according to claim 2, characterized in that: The transmission component comprises two mutually meshing gears, the gears are arranged in the cavity of the fixing seat, and the two rotating shafts are respectively fixed on the two gears.

4. The flexible endoscope delivery device according to claim 3, characterized in that: Two bearings for mounting the two rotating shafts are also arranged in the cavity of the fixing seat.

5. The flexible endoscope delivery device according to claim 1, characterized in that: The two rotating shafts are respectively provided with a circle of limiting half grooves along the circumferential direction, and the limiting half grooves on the two rotating shafts together form a limiting groove for the flexible endoscope to pass through.

6. The flexible endoscope delivery device according to claim 1, characterized in that: An adjusting knob is disposed at the top end of at least one of the rotating shafts.

7. The flexible endoscope delivery device according to claim 1, characterized in that: The fixing seat is also provided with a guide seat, and the guide seat has a guide hole, and the soft endoscope extends into the middle of the two rotating shafts through the guide hole.

8. The flexible endoscope delivery device according to claim 1, characterized in that: The fixing mechanism further includes a lock pin and a spring, wherein the lock pin is movably connected to the fixing seat, and a mounting groove for mounting the spring is provided on the lock pin, and two ends of the spring are respectively connected to the lock pin and the fixing seat; The outer sheath is provided with a first clamping groove and a second clamping groove at two opposite sides thereof, and the two ends of the locking pin are provided with a first clamping portion and a second clamping portion respectively; When the locking pin moves to the first predetermined position, the first buckle portion is clamped in the first clamping groove and the second buckle portion is clamped in the second clamping groove, the fixing seat is locked on the outer sheath tube, and the spring is in a compressed state; When the locking pin moves to the second predetermined position, the spring is further compressed, the second buckle portion disengages from the second clamping groove, and the fixing seat and the outer sheath are unlocked.

9. A brain tissue retraction system, characterized in that: It comprises a puncture device and a flexible endoscope delivery device according to any one of claims 1 to 8, wherein the puncture device comprises an outer sheath tube and an inner sleeve tube that match each other, and the outer sheath tube can be detachably connected to any one of the inner sleeve tube and the flexible endoscope delivery device.

10. The brain tissue retraction system according to claim 9, characterized in that: The outer sheath comprises a tube portion and a handle portion, the flexible endoscope delivery device is mounted on the handle portion, a chamfer is provided at the top end of the tube portion, and a guide tube of the flexible endoscope delivery device extends into the tube portion from the chamfer.

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