Endoscope water jet spray gun

Abstract

The invention relates to the technical field of medical field, and discloses an endoscope water jet scalpel spray gun which comprises a scalpel head, the scalpel head comprises a main rod body, a supporting frame and a liquid pressure pipe located in the main rod body, a back suction channel is formed in the main rod body, one end of the supporting frame is connected to the far end of the main rod body, and the other end of the supporting frame is connected to the liquid pressure pipe. The other end of the supporting frame extends out of the main rod body and is connected with the liquid pressure pipe, one end of the liquid pressure pipe extends out of the far end of the main rod body and is provided with a nozzle, and the back suction channel is provided with a back suction opening located in the far end of the main rod body. According to the endoscope water jet scalpel spray gun, the uniformity of a wound surface is improved, effusion is removed in time, tissue is separated in time, the influence on the operation view and repeated manual removal are avoided, the operation duration is shortened, the operation intensity is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of medical science, and in particular to a laparoscopic water jet spray gun. Background Technology

[0002] Low back pain has become an international health problem. Spinal and lumbar back injuries are listed as the most common cause of limited mobility in people under 45 years old. Lumbar disc herniation is the most common, and discectomy is one of the most frequently performed surgeries worldwide. Spinal endoscopic surgery systems have become the main instruments for this treatment. During the decompression of the intervertebral disc and nerve roots, a set of disc instruments, such as nerve traction devices, grasping forceps, and biting forceps, are used. These instruments are operated through the working channel of the endoscopic system. Compared with traditional open surgery, this method has advantages such as being minimally invasive, not damaging vertebral stability, having fewer complications, and achieving better results. However, this treatment method still has many shortcomings. First, for grasping and biting instruments, tissue separation is achieved through biting, cutting, and tearing, resulting in uneven wound surfaces, affecting the surgical field, and leading to poor surgical outcomes. Second, these instruments are operated through the working channel of the spinal endoscope, and the diameter of the instrument tip is small, so the volume of tissue to be grasped is very small. After grasping, it must be removed from the body, and excessive repetition leads to low surgical efficiency, high workload for medical staff, and long operation time. Summary of the Invention

[0003] The invention aims to address at least one of the technical problems existing in the prior art. It provides a laparoscopic water jet spray gun that improves the neatness of the wound surface, promptly removes accumulated fluid and separates tissue, avoids impact on the surgical field of view and repeated manual removal, shortens surgical time, reduces operational intensity, and improves surgical efficiency.

[0004] To achieve the above objectives, the present invention provides a laparoscopic water jet spray gun, including a cutter head. The cutter head includes a main rod, a support frame, and a liquid pressure pipe located in the main rod. The main rod has a back suction channel. One end of the support frame is connected to the distal end of the main rod, and the other end of the support frame extends out of the main rod and is connected to the liquid pressure pipe. One end of the liquid pressure pipe extends out of the distal end of the main rod and is provided with a nozzle. The back suction channel has a back suction port located at the distal end of the main rod.

[0005] As a preferred embodiment, the nozzle is positioned toward the back suction port, and a blade impact zone is formed between the nozzle and the back suction port.

[0006] As a preferred embodiment, the liquid pressure pipe is a flexible pipe, and the section of the liquid pressure pipe extending out of the main rod body is called the extended pipe section. The nozzle is disposed in the extended pipe section. The support frame is provided with a first connecting part at the end away from the main rod body, and a second connecting part is provided on the outer circumferential surface of the extended pipe section. The first connecting part and the second connecting part are connected to form an angle-adjustable resistance part, and the liquid pressure pipe is slidably installed in the main rod body.

[0007] As a preferred embodiment, the support frame includes a support section and a connecting section. One end of the support section is connected to the main rod body, and the other end of the support section is connected to the connecting section. The liquid pressure pipe is slidably connected to the support section. The first connecting part is located away from the end of the support section. The connecting section extends toward the side of the suction port. The second connecting part is disposed on the outer peripheral wall of the liquid pressure pipe toward the side of the suction port.

[0008] As a preferred embodiment, the support section is provided with an adjustable avoidance slope on the side opposite to the suction port.

[0009] As a preferred embodiment, the cutter head includes an adapter tube, the main rod body is connected to the adapter tube, one end of the adapter tube is provided with an adapter channel, the back suction channel is connected to the adapter channel, the other end of the adapter tube is provided with an adapter outlet and an angle adjustment assembly, the liquid pressure tube extends out from the adapter outlet through the adapter channel, the angle adjustment assembly includes an angle adjustment bracket and a lever, the angle adjustment bracket is provided with an angle adjustment shaft perpendicular to the sliding direction of the liquid pressure tube, the lever is rotatably connected to the angle adjustment shaft, and one end of the lever is connected to the liquid pressure tube.

[0010] As a preferred embodiment, the device further includes a handle, which comprises a handle connector and a retrieval connector. The cutter head comprises a cutter head connector and a cutter head seat. The adapter tube is fixed within the cutter head seat. One end of the cutter head connector is fixed to the cutter head seat, and the other end extends out of the cutter head seat. The angle adjustment component is located between the adapter outlet and the cutter head connector. At least a portion of the lever extends out of the cutter head seat. The handle connector is detachably connected to the cutter head connector. The handle connector has a connecting pipe channel, and the cutter head connector has a liquid supply channel. The liquid pressure pipe communicates with the liquid supply channel, and the connecting pipe channel communicates with the liquid supply channel. The adapter tube is detachably connected to the retrieval connector, and the adapter channel communicates with the retrieval connector.

[0011] As a preferred embodiment, the handle connector and the cutter head connector are coaxially mounted. One end of the handle connector is provided with a plug-in channel. The plug-in channel is provided with a pipe socket and a locking groove that are connected sequentially along the axial direction. A locking block is provided on one side of the pipe socket in the circumferential direction. An elastic locking pin is connected to the outer periphery of the handle connector. One end of the elastic locking pin is connected to the locking block. The handle connector is provided with a snap-fit ​​interface that is positioned corresponding to the elastic locking pin. The snap-fit ​​interface is connected to the locking groove.

[0012] The outer periphery of the cutter head connector has a locking block protruding outwards, and the outer periphery of the locking block has a locking groove.

[0013] One end of the cutter head connector is inserted into the insertion channel through the pipe socket. The locking block enters the locking groove through the pipe socket. When the cutter head connector is rotated, the locking block contacts the elastic locking pin through the locking interface. The elastic locking pin is engaged with the locking groove.

[0014] As a preferred embodiment, the handle includes a handle housing, a trigger, a turntable, a central shaft, a pull cable, and a rotating sleeve. The handle housing has a mounting cavity. One end of the blade is connected to the rotating sleeve. The handle connector and the retraction connector are connected inside the rotating sleeve. The rotating sleeve is rotatably connected to the handle housing and located within the mounting cavity. The trigger is rotatably connected to the handle housing via a trigger shaft. The trigger is drivenly connected to the turntable. At least a portion of the trigger is located outside the handle housing. The turntable is rotatably connected to the mounting cavity of the handle housing via a turntable shaft. The pull cable is connected to the turntable and wound around the outer periphery of the rotating sleeve via the central shaft. The rotating sleeve is located above the central shaft.

[0015] The central rotating shaft, the turntable rotating shaft, and the trigger rotating shaft extend along a first direction, and the axial direction of the rotating sleeve extends along a second direction, with the first direction being perpendicular to the second direction.

[0016] As a preferred embodiment, a sliding pin is connected to one side of the turntable, the sliding pin is eccentrically connected to one side of the turntable, and a sliding groove is provided at one end of the trigger, with the sliding pin slidably connected to the sliding groove.

[0017] Compared with existing technologies, the laparoscopic water jet spray gun of this invention has the following advantages: The main shaft serves as the primary support component for the cutting head. A liquid pressure tube is used to inject high-pressure liquid to form the cutting head at the nozzle for tissue removal. One end of the support frame is connected to the main shaft for fixation, and the other end extends out of the main shaft and connects to the liquid pressure tube. The support frame supports the liquid pressure tube, ensuring the positional stability of the nozzle. One end of the liquid pressure tube extends beyond the distal end of the main shaft and is equipped with a nozzle. With the support of the support frame, a certain distance is maintained between the nozzle and the suction port, preventing the negative impact of suction from the suction port on the cutting jet at the nozzle and ensuring the accuracy of the cutting operation. The suction channel has a suction port located at the distal end of the main shaft. Accumulated fluid or separated tissue generated during operation enters the suction channel through the suction port, enabling immediate removal of accumulated fluid and separated tissue. This avoids interference with the surgical field of view and repeated manual removal, shortens surgical time, reduces operational intensity, and improves surgical efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 This is an embodiment of the present invention. Figure 1 A magnified structural diagram at point C.

[0020] Figure 3 This is an embodiment of the present invention. Figure 2 A magnified structural diagram at point E in the diagram.

[0021] Figure 4 This is another embodiment of the present invention. Figure 1 A magnified structural diagram at point C.

[0022] Figure 5 This is a schematic diagram of the assembly structure of the handle connector and the blade head according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the cutter head in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the adapter pipe and angle adjustment assembly according to an embodiment of the present invention.

[0025] Figure 8 This is a cross-section of the adapter pipe and angle adjustment assembly according to an embodiment of the present invention.

[0026] Figure 9 This is a cross-sectional schematic diagram of the overall structure of an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the blade connector according to an embodiment of the present invention.

[0028] Figure 11 This is an embodiment of the present invention. Figure 2 A magnified structural diagram of point A in the diagram.

[0029] Figure 12 This is a schematic diagram of the handle connector according to an embodiment of the present invention.

[0030] Figure 13 This is a cross-sectional view of the handle connector according to an embodiment of the present invention.

[0031] Figure 14 This is a cross-sectional view of the assembly structure of the handle connector and the blade connector according to an embodiment of the present invention.

[0032] Figure 15 This is a cross-sectional schematic diagram of one side of the overall structure of an embodiment of the present invention.

[0033] Figure 16 This is a cross-sectional schematic diagram of the overall structure of an embodiment of the present invention from another side.

[0034] Figure 17 This is a schematic diagram of the structure of the wheel in an embodiment of the present invention.

[0035] Figure 18 This is a schematic diagram of the rotating ferrule according to an embodiment of the present invention.

[0036] Figure 19 This is a schematic diagram of the blade connector according to an embodiment of the present invention.

[0037] Figure 20 This is a schematic diagram of the cutter head connector from another angle according to an embodiment of the present invention.

[0038] Figure 21 This is a schematic diagram of the structure of the elastic operating component according to an embodiment of the present invention.

[0039] Figure 22 This is a schematic diagram of the assembly structure of the elastic operating component, rotating ferrule, and cutter head connector according to an embodiment of the present invention.

[0040] Figure 23 This is an embodiment of the present invention. Figure 9 A magnified structural diagram of point B in the diagram.

[0041] In the picture:

[0042] 10. Handle connector; 11. Insertion channel; 12. Pipe socket; 13. Locking block; 14. First locking block; 15. Second locking block; 16. Second limiting surface; 17. Locking groove; 18. Elastic locking pin; 19. Clearance groove; 20. Snap-fit ​​interface; 21. Pipe channel;

[0043] 30. Cutter head connector; 31. Locking block; 32. First limiting surface; 33. First locking block; 34. Second locking block; 35. Locking section; 36. Locking groove; 37. Insertion section; 38. Sealing ring groove; 39. Sealing ring; 40. Liquid supply channel; 60. Cutter head; 62. Cutter head slot; 63. Circumferential groove; 64. Axial groove; 65. Cutter head seat;

[0044] 70. Handle; 71. Handle housing; 72. Operating through groove; 73. Mounting cavity; 74. Trigger; 75. Trigger torsion spring; 76. Slide groove; 77. Trigger shaft; 78. Turntable; 79. Preloaded torsion spring; 80. Rotating block; 81. Second side; 82. Sliding pin; 83. First side; 84. Turntable shaft; 85. Central shaft; 86. Pull cable; 87. Rotating sleeve; 88. Snap-fit ​​groove; 89. First sleeve groove; 90. Second sleeve groove; 91. Retraction connector; 92. Connecting rib;

[0045] 100. Flexible operating element; 101. First locking arm; 102. Second locking arm; 103. Flexible arc-shaped rod; 104. Button; 105. Locking protrusion; 106. First rod segment; 107. Second rod segment; 108. Third rod segment; 109. Fourth rod segment;

[0046] 120. Main rod body; 121. Back suction channel; 122. Back suction port; 123. Blade impact zone;

[0047] 130. Support frame; 131. First connecting part; 132. Support section; 133. Connecting section; 134. Adjustable clearance slope;

[0048] 140. Liquid pressure pipe; 141. Nozzle; 142. Extending pipe section; 143. Second connection part;

[0049] 150. Adapter pipe; 151. Adapter channel; 152. Adapter outlet; 153. Angle adjustment assembly; 154. Angle adjustment bracket; 155. Lever; 156. Angle adjustment shaft; 157. Pulley. Detailed Implementation

[0050] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0051] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0052] In the description of this invention, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] like Figures 1 to 9 As shown in the preferred embodiment of the present invention, a laparoscopic water jet spray gun includes a cutter head 60. The cutter head 60 includes a main rod 120, a support frame 130, and a liquid pressure pipe 140 located inside the main rod 120. The main rod 120 is provided with a back suction channel 121. One end of the support frame 130 is connected to the distal end of the main rod 120, and the other end of the support frame 130 extends out of the main rod 120 and is connected to the liquid pressure pipe 140. One end of the liquid pressure pipe 140 extends out of the distal end of the main rod 120 and is provided with a nozzle 141. The back suction channel 121 is provided with a back suction port 122 located at the distal end of the main rod 120.

[0054] In the laparoscopic water jet spray gun of the present invention, the main rod 120 serves as the main support component for the cutter head 60. The liquid pressure pipe 140 is used to inject high-pressure liquid to form the cutter head 60 at the nozzle 141 for tissue removal. One end of the support frame 130 is connected to the main rod 120 to fix the support frame 130. The other end of the support frame 130 extends out of the main rod 120 and is connected to the liquid pressure pipe 140. The support frame 130 is used to support the liquid pressure pipe 140 and ensure the positional stability of the nozzle 141 of the liquid pressure pipe 140. One end of the liquid pressure pipe 140 extends out of the far end of the main rod 120 and is provided with the nozzle 141. Under the support of the support frame 130, the liquid pressure pipe 140 ensures that there is a certain distance between the nozzle 141 of the liquid pressure pipe 140 and the back suction port 122, preventing the negative impact of the suction force of the back suction port 122 on the cutting jet at the nozzle 141 and ensuring the accuracy of the cutting operation of the cutter head 60. The suction channel 121 is provided with a suction port 122 located at the distal end of the main rod 120. During the operation, the accumulated fluid or separated tissue enters the suction channel 121 through the suction port 122 to achieve immediate removal of accumulated fluid and separated tissue, avoid affecting the surgical field of view and repeated manual removal, shorten the operation time, reduce the operation intensity, and improve the operation efficiency.

[0055] As one embodiment, such as Figure 5 As shown, the length of the main rod 120 and the liquid pressure tube 140 in the first direction is L, where L = 50mm-400mm. Preferably, L = 200mm-350mm to meet the requirements of the spinal endoscope working channel for the instrument.

[0056] As one embodiment, such as Figure 4 As shown, the diameter of the main rod 120 is D, where D = 0.1 mm - 10 mm. Preferably, D = 1 mm - 4 mm to meet the requirements of the spinal endoscope working channel for the instrument.

[0057] Of course, the length L and diameter D can be adjusted according to the actual application, and are not limited to applications in spinal endoscopy.

[0058] Furthermore, such as Figure 4 As shown, the nozzle 141 is positioned towards the suction port 122, forming a blade impact zone 123 between the nozzle 141 and the suction port 122. The nozzle 141 and the suction port 122 are positioned opposite each other, forming the blade impact zone 123 between them. The accumulated liquid and separated tissue formed after cutting by the blade 60 of the nozzle 141 are mainly concentrated in the blade impact zone 123 and are relatively close to the nozzle 141. When the nozzle 141 sprays liquid, it not only produces the cutting effect of the blade 60 but also pushes the accumulated liquid and separated tissue towards the suction port 122, thereby shortening the suction distance of the suction port 122, effectively reducing the suction time, and improving the suction efficiency.

[0059] As one embodiment, such as Figure 4 As shown, the length of the blade impact zone 123 is H, where H = 0.5mm-20mm. Preferably, H = 2mm-6mm to meet the requirements of the spinal endoscope working channel for the instrument.

[0060] As one embodiment, such as Figure 4 As shown, the depth of the blade impact zone 123 is W, where W = 0 < w < D, to meet the requirements of the spinal endoscope working channel for the instrument.

[0061] Furthermore, such as Figure 2 As shown, the liquid pressure pipe 140 is a flexible pipe. A section of the liquid pressure pipe 140 extending beyond the main rod 120 is called an extension section 142. A nozzle 141 is disposed on the extension section 142. A first connecting portion 131 is provided at the end of the support frame 130 away from the main rod 120. A second connecting portion 143 is provided on the outer circumferential surface of the extension section 142. The first connecting portion 131 and the second connecting portion 143 are connected to form an angle-adjusting resistance section. The liquid pressure pipe 140 is slidably installed within the main rod 120. At least the extension section 142 of the liquid pressure pipe 140 is a flexible pipe. The liquid pressure pipe 140 is slidably installed within the main rod 120. The first connecting portion 131 of the support frame 130 and the second connecting portion 143 of the extension section 142 are connected to form an angle-adjusting resistance section. When the liquid pressure pipe 140 moves axially along the main rod 120, the spray angle of the nozzle 141 is changed due to the obstruction of the angle-adjusting resistance section.

[0062] As one embodiment, the liquid pressure tube 140 is made of a material with a certain degree of elasticity that can withstand liquid pressure without deformation, such as austenitic stainless steel or a thin-walled stainless steel tube.

[0063] In one embodiment, the wall thickness of the liquid pressure pipe 140 is set between 0.05 mm and 0.5 mm. Because the wall of the liquid pressure pipe 140 is relatively thin, it can achieve a small range of elastic deformation within the elastic range allowed by the material.

[0064] Furthermore, such as Figures 2 to 3As shown, the support frame 130 includes a support section 132 and a connecting section 133. One end of the support section 132 is connected to the main rod 120, and the other end of the support section 132 is connected to the connecting section 133. The liquid pressure pipe 140 is slidably connected to the support section 132. The first connecting part 131 is located away from the end of the support section 132, and the connecting section 133 extends towards the suction port 122. The second connecting part 143 is disposed on the outer peripheral wall of the liquid pressure pipe 140 facing the suction port 122. The liquid pressure pipe 140 is slidably connected to the support section 132, which improves the stability of the liquid pressure pipe 140 during angle adjustment. Since the second connecting part 143 is disposed on the side of the liquid pressure pipe 140 facing the suction port 122, when the liquid pressure pipe 140 moves, it causes the nozzle 141 to rotate towards the suction port 122, making the cutting position of the nozzle 141 closer to the suction port 122, thus improving the suction efficiency.

[0065] As one embodiment, such as Figures 2 to 3 As shown, the connecting segment 133 extends radially, and the length F of the connecting segment 133 is less than the inner diameter of the main rod 120.

[0066] As one embodiment, such as Figures 2 to 3 As shown, the axial projected area of ​​the connecting section 133 is larger than that of the support section 132, which enhances the stress strength of the connecting section 133 and ensures the smooth adjustment of the nozzle 141 angle.

[0067] As one embodiment, such as Figure 2 As shown, one end of the support section 132 is connected to the main rod 120 to prevent the support section 132 from protruding radially from the outer circumferential surface of the main rod 120 and to ensure the smoothness of the surface of the main rod 120.

[0068] Furthermore, such as Figures 2 to 3 As shown, the support section 132 is provided with an adjustable avoidance slope 134 on the side away from the suction port 122. This reduces the squeezing of the liquid pressure pipe 140 by the support frame 130 when the nozzle 141 rotates away from the suction port 122, ensuring smooth liquid discharge from the liquid pressure pipe 140 and avoiding the impact of angle adjustment on the cutting effect of the nozzle 141.

[0069] As one embodiment, such as Figure 6 As shown, the included angle between the nozzle 141 and the main rod 120 is α, where 0°≤α≤180°.

[0070] Furthermore, such as Figures 7 to 8As shown, the blade head 60 includes an adapter tube 150, with the main body 120 connected to the adapter tube 150. One end of the adapter tube 150 has an adapter channel 151, which communicates with the back suction channel 121. The other end of the adapter tube 150 has an adapter outlet 152 and an angle adjustment assembly 153. The liquid pressure tube 140 extends from the adapter outlet 152 through the adapter channel 151. The angle adjustment assembly 153 includes an angle adjustment bracket 154 and a lever 155. The angle adjustment bracket 154 has an angle adjustment shaft 156 perpendicular to the sliding direction of the liquid pressure tube 140. The lever 155 is rotatably connected to the angle adjustment shaft 156, and one end of the lever 155 is connected to the liquid pressure tube 140. By moving the liquid pressure tube 140 with the lever 155, the accumulated fluid or separated tissue sucked in from the back suction port 122 is sucked out through the adapter channel 151.

[0071] As one embodiment, such as Figures 7 to 9 As shown, the adapter tube 150 is connected inside the cutter head seat 65, and one end of the lever 155 extends out of the cutter head seat 65 for easy operation.

[0072] As one embodiment, such as Figures 7 to 8 As shown, the angle adjustment assembly 153 also includes a lever 157. The lever 157 has a lever 157 through groove and a lever 157 retaining groove. The liquid pressure pipe 140 passes through the lever 157 through groove and is welded to the lever 157. One end of the lever 155 is engaged with the lever 157 retaining groove. The lever 155 is connected to the liquid pressure pipe 140 through the lever 157, improving the reliability of the connection between the lever 155 and the liquid pressure pipe 140. Preferably, the through groove of the lever 157 extends in the same direction as the liquid pressure pipe 140.

[0073] Furthermore, such as Figures 7 to 9 As shown, it also includes a handle 70, which includes a handle connector 10 and a recovery connector 91. The cutter head 60 includes a cutter head connector 30 and a cutter head seat 65. The adapter pipe 150 is fixed inside the cutter head seat 65. One end of the cutter head connector 30 is fixed to the cutter head seat 65, and the other end extends out of the cutter head seat 65. The angle adjustment component 153 is located between the adapter outlet 152 and the cutter head connector 30. At least a portion of the lever 155 extends out of the cutter head seat 65. The handle connector 10 and the cutter head connector 30 are detachably connected. The handle connector 10 is provided with a pipe channel 21. The cutter head connector 30 is provided with a liquid supply channel 40. The liquid pressure pipe 140 is connected to the liquid supply channel 40. The adapter pipe 150 is detachably connected to the recovery connector 91, and the adapter channel 151 is connected to the recovery connector 91. The handle 70 and the blade head 60 are detachably connected via the handle connector 10 and the blade head connector 30, respectively. The adapter tube 150 is detachably connected to the recycling connector 91, so as to realize the replacement of the blade head 60 of the spray gun and the replacement of different shapes of blade heads 60 to meet more different usage needs.

[0074] Furthermore, such as Figure 10 - Figure 14 As shown, the handle connector 10 and the cutter head connector 30 are coaxially mounted. One end of the handle connector 10 is provided with a plug-in channel 11. The plug-in channel 11 is provided with a pipe socket 12 and a locking groove 17 connected sequentially along the axial direction. A locking block 13 is provided on one side of the pipe socket 12. An elastic locking pin 18 is connected to the outer periphery of the handle connector 10. One end of the elastic locking pin 18 is connected to the locking block 13. The handle connector 10 is provided with a snap-fit ​​interface 20 whose position corresponds to the elastic locking pin 18. The snap-fit ​​interface 20 is connected to the locking groove 17.

[0075] A locking block 31 protrudes from the outer periphery of the cutter head connector 30, and a locking groove 88 is provided on the outer peripheral surface of the locking block 31.

[0076] One end of the cutter head connector 30 is inserted into the insertion channel 11 through the pipe socket 12. The locking block 31 enters the locking groove 17 through the pipe socket 12. By rotating the cutter head connector 30, the locking block 31 contacts the elastic locking pin 18 through the locking interface 20, and the elastic locking pin 18 is engaged in the locking through groove 88. When the handle connector 10 is connected to the cutter head connector 30, the connection is achieved by inserting the cutter head connector 30 into the insertion channel 11 through the pipe socket 12. Subsequently, the locking block 31 enters the locking groove 17 through the pipe inlet 12. The cutter head connector 30 is rotated. Since the elastic locking pin 18 is connected to the locking block 13 at only one end, and the other end is free to move, when the locking block 31 contacts the elastic locking pin 18 through the locking interface 20, only a slight force is needed to continue rotating it axially. The elastic locking pin 18 can then engage with the locking groove 88, preventing the handle connector 10 and the cutter head connector 30 from rotating relative to each other axially. This achieves circumferential connection limitation between the handle connector 10 and the cutter head connector 30, simplifying the assembly process. Simultaneously, the cooperation between the locking block 13 and the locking block 31 also achieves axial limitation between the handle connector 10 and the cutter head connector 30, thereby ensuring the stability of the connection position between the handle connector 10 and the cutter head connector 30.

[0077] When it is necessary to separate the cutter head connector 30 from the handle connector 10, rotate the cutter head connector 30 and the handle connector 10 relative to each other, so that the elastic locking pin 18 slides out of the locking groove 88 and the locking block 31 moves to the pipe socket 12, so that the cutter head connector 30 and the handle connector 10 can be separated axially.

[0078] As one embodiment, such as Figure 12 As shown, the outer peripheral surface of the elastic locking pin 18 is arc-shaped, and the shape of the locking groove 88 corresponds to the shape of the elastic locking pin 18.

[0079] As one embodiment, such as Figure 11 and Figure 14As shown, the locking block 31 has a first limiting surface 32 on the side facing the locking block 13, and the locking block 13 has a second limiting surface 16 on the side facing the locking block 31. The first limiting surface 32 and the second limiting surface 16 are in contact, thereby limiting the handle connector 10 and the cutter head connector 30 in the axial direction and ensuring the stability of the connection position between the handle connector 10 and the cutter head connector 30.

[0080] As one embodiment, such as Figures 11 to 14 As shown, the locking block 31 includes a first locking block 33 and a second locking block 34 connected to the outer peripheral surface of the cutter head connector 30. A locking groove 88 is formed in the first locking block 33, and a first limiting surface 32 is disposed in the second locking block 34. The locking block 13 includes a first locking block 14 and a second locking block 15. One end of the first locking block 14 and the second locking block 15 are respectively connected to the insertion channel 11, and the other end protrudes radially from the inner wall of the insertion channel 11. An elastic locking pin 18 is connected to the first locking block 14, and a second limiting surface 16 is disposed in the second locking block 15. Separating the axial limiting structure from the circumferential limiting structure can reduce the risk or impact of stress concentration and improve the stability and reliability of the limiting structure.

[0081] As one embodiment, such as Figures 11 to 12 As shown, the first locking block 33 and the second locking block 34 are arranged opposite to each other on the outer peripheral surface of the cutter head connector 30, and the first locking block 14 and the second locking block 15 are connected opposite to each other to the inner wall of the insertion channel 11. This makes the positions of the first locking block 33 and the second locking block 34 relatively dispersed, and the positions of the first locking block 14 and the second locking block 15 relatively dispersed, which can reduce the risk or impact of stress concentration and improve the stability and reliability of the limiting structure.

[0082] As one embodiment, such as Figures 12 to 14 As shown, the outer peripheral surface of the handle connector 10 is provided with an axially extending clearance groove 19. The position of the clearance groove 19 corresponds to the position of the locking block 13. The elastic locking pin 18 is installed in the clearance groove 19, and the axial projection of the elastic locking pin 18 is located within the axial projection of the locking block 13. By setting the clearance groove 19, the elastic locking pin 18 is installed in the clearance groove 19, avoiding the elastic locking pin 18 from protruding radially from the outer peripheral surface of the handle connector 10. This reduces the possibility of the elastic locking pin 18 contacting other parts or surfaces, thereby reducing wear and damage caused by friction and helping to extend the service life of the pipe connector and related components.

[0083] As one embodiment, such as Figures 11 to 12As shown, the locking block 31 is connected to the outer periphery of the cutter head connector 30 to form a locking section 35. The shape of the pipe inlet 12 corresponds to the shape of the outer periphery of the locking section 35, which can ensure that the cutter head connector 30 is inserted into the handle connector 10. At the same time, after the cutter head connector 30 and the handle connector 10 are rotated relative to each other, the pipe inlet 12 and the locking section 35 are misaligned, resulting in a good initial positioning effect.

[0084] As one embodiment, such as Figure 11 As shown, the cutter head connector 30 also includes an insertion section 37, one end of which is connected to a locking section 35. The insertion section 37 is connected to the insertion channel 11, and the locking section 35 is connected to the locking groove 17. The diameter of the end of the insertion section 37 away from the locking section 35 is smaller than the minimum diameter of the locking section 35. The cutter head connector 30 is generally frustum-shaped, and the insertion portion of the cutter head connector 30 into the insertion channel 11 is relatively small, which facilitates the assembly operation of the cutter head connector 30 and the handle connector 10.

[0085] As one embodiment, such as Figure 14 As shown, the outer peripheral surface of the insertion section 37 is provided with a sealing ring groove 38, and a sealing ring 39 is connected inside the sealing ring groove 38. The outer peripheral surface of the sealing ring 39 is in contact with the inner wall of the insertion channel 11. The sealing ring 39 provides additional friction for the connection between the handle connector 10 and the blade connector 30, preventing the handle connector 10 and the blade connector 30 from accidentally falling off or loosening, thereby improving the stability of the connection.

[0086] As one embodiment, such as Figure 14 As shown, the handle connector 10 has a connecting pipe channel 21 that communicates with the insertion channel 11, and the cutter head connector 30 has a liquid supply channel 40. When the cutter head connector 30 is installed in the insertion channel 11, the connecting pipe channel 21 and the liquid supply channel 40 are connected. The connecting pipe channel 21 is used to connect a high-pressure water source, and the high-pressure water source provides high-pressure water to the cutter head 60 through the connecting pipe channel 21 and the liquid supply channel 40 in sequence to achieve cutting.

[0087] As one embodiment, such as Figure 14 As shown, the insertion channel 11, the connecting pipe channel 21, and the liquid supply channel 40 are coaxially arranged.

[0088] Furthermore, such as Figure 15 - Figure 23As shown, the endoscopic water jet spray gun includes a handle 70 and a cutter head 60. The handle 70 includes a handle housing 71, a trigger 74, a turntable 78, a central rotating shaft 85, a pull cable 86, and a rotating sleeve 87. The handle housing 71 has a mounting cavity 73. One end of the cutter head 60 is connected to the rotating sleeve 87. The handle connector 10 and the recovery connector 91 are connected inside the rotating sleeve 87. The rotating sleeve 87 is rotatably connected to the handle housing 71 and located inside the mounting cavity 73. The trigger 74 is rotatably connected to the handle housing 71 through the trigger shaft 77. The trigger 74 is drively connected to the turntable 78. At least a part of the trigger 74 is located outside the handle housing 71. The turntable 78 is rotatably connected to the mounting cavity 73 of the handle housing 71 through the turntable shaft 84. The pull cable 86 is connected to the turntable 78 and is wound around the outer periphery of the rotating sleeve 87 through the central rotating shaft 85. The rotating sleeve 87 is located above the central rotating shaft 85.

[0089] The central pivot 85, the turntable pivot 84, and the trigger pivot 77 extend along a first direction, while the axial direction of the rotating sleeve 87 extends along a second direction, with the first and second directions perpendicular. At least a portion of the trigger 74 is exposed outside the handle housing 71. During operation, the trigger 74 is held in conjunction with the handle housing 71. Specifically, pulling the trigger 74 causes it to rotate around the trigger pivot 77. The trigger 74 is connected to the turntable 78, which in turn rotates the turntable 78. A pull cable 86 is connected to the turntable 78, which moves the pull cable 86. The pull cable 86 is wound around the outer circumference of the rotating sleeve 87 via the central pivot 85, causing the rotating sleeve 87 to rotate. The blade head 60 is connected to the rotating sleeve 87, which in turn causes the blade head 60 to rotate, enabling the blade head 60 to rotate axially to meet more operational needs and improve the convenience of surgical operations.

[0090] As one embodiment, such as Figure 15 - Figure 16 As shown, a sliding pin 82 is connected to one side of the turntable 78. The sliding pin 82 is eccentrically connected to one side of the turntable 78. One end of the trigger 74 is provided with a groove 76, and the sliding pin 82 is slidably connected to the groove 76. When the trigger 74 rotates through the trigger shaft 77, it pushes the sliding pin 82 to move within the groove 76, causing the turntable 78 to rotate. The turntable 78 pulls the pull cable 86 to move, thereby causing the rotating sleeve 87 to rotate around the second direction.

[0091] As one embodiment, such as Figure 15 - Figure 17 As shown, the turntable 78 is provided with a rotating block 80, which protrudes from the turntable 78 in a first direction and is arranged along the edge of the turntable 78. At least a portion of the pull wire 86 is in contact with the outer surface of the rotating block 80. By setting the rotating block 80, during the rotation of the turntable 78, the pull wire 86 is in contact with the edge of the rotating block 80 and moves along the edge of the turntable 78, thereby achieving tension on the pull wire 86.

[0092] As one embodiment, such as Figure 15 - Figure 17 As shown, the turntable 78 has a first side 83 and a second side 81 arranged opposite to each other in the first direction. A sliding pin 82 is connected to the first side 83, and a rotating block 80 is connected to the second side 81. The sliding pin 82 is connected to the trigger 74 for transmission. When the pull cable 86 rotates with the turntable 78, it may come into contact with or separate from the rotating block 80. The sliding pin 82 and the rotating block 80 are not on the same side of the turntable 78, so as to avoid interference between the components during transmission and to reasonably allocate the rotation space.

[0093] As one embodiment, such as Figure 15 As shown, a preloaded torsion spring 79 is connected to the turntable shaft 84. One end of the preloaded torsion spring 79 is connected to the turntable 78, and the other end is connected to the pull cable 86. The function of the preloaded torsion spring 79 is to maintain the tension of the pull cable 86 and prevent jamming and false displacement during the rotation of the turntable 78.

[0094] like Figure 15 As shown, the rotating block 80 is provided with a connecting notch. The first end of the pull wire 86 is connected to one end of the torsion spring. After the pull wire 86 passes through the connecting notch and wraps around to the outer circumferential surface of the rotating block 80, it abuts against the side of the central rotating shaft 85 away from the turntable 78 and then winds around the rotating sleeve 87. After winding around the rotating sleeve 87 several times, it abuts against the side of the central rotating shaft 85 away from the turntable 78, and the second end of the pull wire 86 is attached to the outer circumferential surface of the rotating block 80 and connected to the turntable 78.

[0095] The central shaft 85 serves to position the pull wire 86, ensuring that the pull wire 86 can move axially around the rotating sleeve 87 on the rotating sleeve 87.

[0096] As one embodiment, such as Figure 15 - Figure 16 As shown, the pull wire 86 rotates one circle on the rotating sleeve 87.

[0097] As one embodiment, such as Figure 15 - Figure 16 As shown, trigger 74 is connected to trigger torsion spring 75. One end of trigger torsion spring 75 is connected to handle housing 71, and the other end of trigger torsion spring 75 is connected to trigger 74. The function of trigger torsion spring 75 is to reset and preload trigger 74.

[0098] As one embodiment, such as Figure 18 As shown, the rotating sleeve 87 is provided with a locking groove 88, and the cutter head 60 is installed in the locking groove 88. The cutter head 60 and the rotating sleeve 87 are detachably connected. The rotating sleeve 87 can install and replace the cutter head 60 as needed, and drive different cutter heads 60 to rotate to meet more usage needs.

[0099] The detachable connection between the cutter head 60 and the rotating ferrule 87 is achievable in the prior art, such as snap-fit ​​or bolt connection.

[0100] As one embodiment, such as Figure 18 - Figure 23 As shown, the cutter head 60 includes a handle connector 10, and cutter head slots 62 are respectively provided on opposite sides of the outer periphery of the handle connector 10. At least a portion of the cutter head slots 62 extends circumferentially and at least a portion extends axially.

[0101] The rotating sleeve 87 is provided with a first sleeve through groove 89 and a second sleeve through groove 90. The first sleeve through groove 89 and the second sleeve through groove 90 are respectively connected to the snap-fit ​​through groove 88. The handle 70 also includes an elastic operating member 100 connected to the rotating sleeve 87. The elastic operating member 100 includes a first snap-fit ​​arm 101, a second snap-fit ​​arm 102, an elastic arc rod 103, and a button 104. The first snap-fit ​​arm 101 and the second snap-fit ​​arm 102 are respectively connected to the two ends of the elastic arc rod 103. The first snap-fit ​​arm 101 snaps into the corresponding cutter head slot 62 through the first sleeve through groove 89. The second snap-fit ​​arm 102 snaps into the corresponding cutter head slot 62 through the second sleeve through groove 90. The opening of the elastic arc rod 103 faces the rotating sleeve 87. The handle housing 71 is provided with an operating through groove 72. The button 104 is connected to the elastic arc rod 103 and extends out of and slides in the operating through groove 72. The cutter head slot 62 extends at least partly circumferentially and at least partly axially. The first locking arm 101 and the second locking arm 102 are respectively engaged with the opposing cutter head slot 62. The elastic operating member 100 clamps the handle connector 10, with the first locking arm 101 and the second locking arm 102 respectively engaging the circumferentially extending portion of the cutter head slot 62, preventing the handle connector 10 from detaching from the rotating sleeve 87 axially. The elastic operating member 100 is connected to the rotating sleeve 87, and the rotation of the rotating sleeve 87 is synchronized with the elastic operating member 100. The first locking arm 101 and the second locking arm 102 are respectively engaged with the axially extending portion of the cutter head slot 62, and the elastic operating member 100 drives the handle connector 10 to rotate synchronously. The first locking arm 101 and the second locking arm 102 are respectively connected to the two ends of the elastic arc rod 103. The button 104 is connected to the elastic arc rod 103 and extends out of the handle housing 71 through the operating groove 72. When the rotating sleeve 87 rotates, the elastic operating member 100 rotates synchronously along the operating groove 72. When it is necessary to separate the handle connector 10 from the rotating sleeve 87, the button 104 is pressed, the elastic arc rod 103 deforms, the first locking arm 101 and the second locking arm 102 move away from the cutter head groove 62, and then the first locking arm 101 and the second locking arm 102 disengage from the cutter head groove 62. The handle connector 10 moves axially and separates from the rotating sleeve 87.

[0102] As one embodiment, such as Figure 15 - Figure 16 As shown, the pull wire 86 is made of metal and is attached to the rotating sleeve 87. The rotating sleeve 87 is rotated by friction.

[0103] As one embodiment, as shown in the figure, a connecting rib 92 is connected between the first ferrule through groove 89 and the second ferrule through groove 90, and an elastic arc rod 103 is located above the corresponding connecting rib 92. The first snap-fit ​​arm 101 and the second snap-fit ​​arm 102 are located on both sides of the connecting rib 92, respectively.

[0104] In one embodiment, the elastic locking pin 18 is located below the corresponding connecting rib 92. The connecting rib 92 limits the elastic locking pin 18, preventing the movable end of the elastic locking pin 18 from moving, thereby preventing the handle connector 10 and the cutter head connector 30 from rotating relative to each other and falling off, thus improving the safety of use.

[0105] As one embodiment, such as Figure 19 As shown, the cutter head slot 62 includes a circumferential slot 63 and an axial slot 64. The lower end of the circumferential slot 63 communicates with one end of the axial slot 64 to form a slot connection. The first locking arm 101 and the second locking arm 102 are respectively connected to a locking protrusion 105 facing one side of the handle connector 10. The locking protrusion 105 is L-shaped and locks into the slot connection. The first locking arm 101 and the second locking arm 102 are simultaneously locked into the circumferential extension and the axial extension of the cutter head slot 62 through the L-shaped locking protrusion 105.

[0106] As one embodiment, such as Figure 21 As shown, the first locking arm 101 and the second locking arm 102 have the same structure. The first locking arm 101 includes a first rod segment 106, a second rod segment 107, a third rod segment 108, and a fourth rod segment 109. The first rod segment 106 and the third rod segment 108 extend along the height direction, while the second rod segment 107 and the fourth rod segment 109 extend along a second direction. The upper end of the first rod segment 106 is connected to the elastic arc-shaped rod 103. The second rod segment 107 is connected to the lower end of the first rod segment 106 and the lower end of the third rod segment 108, respectively. The upper end of the third rod segment 108 is connected to one end of the fourth rod segment 109. The overall shape of the first locking arm 101 and the second locking arm 102 is roughly arranged in a "Z" shape, which improves the structural stability of the elastic operating member 100.

[0107] In summary, this embodiment of the invention provides a laparoscopic water jet spray gun. The main rod 120 serves as the main support component for the cutter head 60. The liquid pressure pipe 140 is used to inject high-pressure liquid to form the cutter head 60 at the nozzle 141 for tissue removal. One end of the support frame 130 is connected to the main rod 120 to fix the support frame 130. The other end of the support frame 130 extends out of the main rod 120 and is connected to the liquid pressure pipe 140. The support frame 130 supports the liquid pressure pipe 140 to ensure the positional stability of the nozzle 141 of the liquid pressure pipe 140. One end of the liquid pressure pipe 140 extends out of the far end of the main rod 120 and is provided with the nozzle 141. Under the support of the support frame 130, the liquid pressure pipe 140 ensures that there is a certain distance between the nozzle 141 of the liquid pressure pipe 140 and the back suction port 122, preventing the negative impact of the suction force of the back suction port 122 on the cutting jet at the nozzle 141, and ensuring the accuracy of the cutting operation of the cutter head 60. The suction channel 121 is provided with a suction port 122 located at the distal end of the main rod 120. During the operation, the accumulated fluid or separated tissue enters the suction channel 121 through the suction port 122 to achieve immediate removal of accumulated fluid and separated tissue, avoid affecting the surgical field of view and repeated manual removal, shorten the operation time, reduce the operation intensity, and improve the operation efficiency.

[0108] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A laparoscopic water jet spray gun, characterized in that: The device includes a cutting head, which comprises a main body, a support frame, and a liquid pressure tube located within the main body. The main body has a back suction channel, and one end of the liquid pressure tube extends out of the distal end of the main body and is provided with a nozzle. The back suction channel has a back suction port located at the distal end of the main body. The liquid pressure pipe is slidably connected to the main rod body, one end of the support frame is connected to the far end of the main rod body, and the other end of the support frame extends out of the main rod body and is connected to the liquid pressure pipe to form an angle-adjustable resistance section.

2. The endoscopic water jet spray gun according to claim 1, characterized in that: The nozzle is positioned toward the suction port, and a blade impact zone is formed between the nozzle and the suction port; Alternatively, the length of the main rod and the liquid pressure pipe in the first direction is L, where L = 50mm - 400mm; Or the diameter of the main rod is D, where D = 0.1mm - 10mm; Alternatively, the nozzle may be positioned towards the back suction port, and a blade impact zone may be formed between the nozzle and the back suction port, wherein the parameters of the blade impact zone satisfy at least one of the following: The length of the impact zone of the cutter head is H, where H = 0.5mm - 20mm; The depth of the impact zone of the cutting head is W, where W = 0 < w < D.

3. The endoscopic water jet spray gun according to claim 1, characterized in that: The liquid pressure pipe is a flexible pipe. The section of the liquid pressure pipe that extends out of the main rod is called the extended pipe section. The nozzle is set in the extended pipe section. The support frame is provided with a first connecting part at the end away from the main rod. The outer circumferential surface of the extended pipe section is provided with a second connecting part. The first connecting part and the second connecting part are connected to form the angle adjustment resistance part.

4. The endoscopic water jet spray gun according to claim 3, characterized in that: The support frame includes a support section and a connecting section. One end of the support section is connected to the main rod body, and the other end of the support section is connected to the connecting section. The liquid pressure pipe is slidably connected to the support section. The first connecting part is located away from the end of the support section. The connecting section extends toward the side of the suction port. The second connecting part is disposed on the outer peripheral wall of the liquid pressure pipe toward the side of the suction port.

5. The endoscopic water jet spray gun according to claim 4, characterized in that: The support section is provided with an adjustable avoidance slope on the side opposite to the back suction port.

6. The endoscopic water jet spray gun according to claim 1, characterized in that: The cutter head includes an adapter tube, the main rod body is connected to the adapter tube, one end of the adapter tube is provided with an adapter channel, the back suction channel is connected to the adapter channel, the other end of the adapter tube is provided with an adapter outlet and an angle adjustment assembly, the liquid pressure tube extends out from the adapter outlet through the adapter channel, the angle adjustment assembly includes an angle adjustment bracket and a lever, the angle adjustment bracket is provided with an angle adjustment shaft perpendicular to the sliding direction of the liquid pressure tube, the lever is rotatably connected to the angle adjustment shaft, and one end of the lever is connected to the liquid pressure tube.

7. The endoscopic water jet spray gun according to claim 6, characterized in that: It also includes a handle, which includes a handle connector and a retrieval connector. The cutter head includes a cutter head connector and a cutter head seat. The adapter pipe is fixed inside the cutter head seat. One end of the cutter head connector is fixed to the cutter head seat, and the other end extends out of the cutter head seat. The angle adjustment component is located between the adapter outlet and the cutter head connector. At least a portion of the lever extends out of the cutter head seat. The handle connector is detachably connected to the cutter head connector. The handle connector has a pipe channel. The cutter head connector has a liquid supply channel. The liquid pressure pipe communicates with the liquid supply channel. The pipe channel communicates with the liquid supply channel. The adapter pipe is detachably connected to the retrieval connector, and the adapter channel communicates with the retrieval connector.

8. The endoscopic water jet spray gun according to claim 7, characterized in that: The handle connector is coaxially mounted with the cutter head connector. One end of the handle connector is provided with a plug-in channel. The plug-in channel is provided with a pipe socket and a locking groove that are connected sequentially along the axial direction. A locking block is provided on one side of the pipe socket in the circumferential direction. An elastic locking pin is connected to the outer periphery of the handle connector. One end of the elastic locking pin is connected to the locking block. The handle connector is provided with a snap-fit ​​interface that is positioned corresponding to the elastic locking pin. The snap-fit ​​interface is connected to the locking groove. The outer periphery of the cutter head connector has a locking block protruding outwards, and the outer periphery of the locking block has a locking groove. One end of the cutter head connector is inserted into the insertion channel through the pipe socket. The locking block enters the locking groove through the pipe socket. When the cutter head connector is rotated, the locking block contacts the elastic locking pin through the locking interface. The elastic locking pin is engaged with the locking groove.

9. The endoscopic water jet spray gun according to claim 7, characterized in that: The handle includes a handle housing, a trigger, a turntable, a central shaft, a pull cable, and a rotating sleeve. The handle housing has a mounting cavity. One end of the blade is connected to the rotating sleeve. The handle connector and the retraction connector are connected inside the rotating sleeve. The rotating sleeve is rotatably connected to the handle housing and located inside the mounting cavity. The trigger is rotatably connected to the handle housing via a trigger shaft. The trigger is drivenly connected to the turntable. At least a portion of the trigger is located outside the handle housing. The turntable is rotatably connected to the mounting cavity of the handle housing via a turntable shaft. The pull cable is connected to the turntable and wound around the outer periphery of the rotating sleeve via the central shaft. The rotating sleeve is located above the central shaft. The central rotating shaft, the turntable rotating shaft, and the trigger rotating shaft extend along a first direction, and the axial direction of the rotating sleeve extends along a second direction, with the first direction being perpendicular to the second direction.

10. The laparoscopic water jet spray gun according to claim 9, characterized in that: A sliding pin is connected to one side of the turntable, and the sliding pin is eccentrically connected to one side of the turntable. One end of the trigger is provided with a sliding groove, and the sliding pin is slidably connected to the sliding groove.

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