Split type needle knife

Abstract

The invention relates to the technical field of medical instruments, in particular to a split type needle knife which comprises a holding assembly, the bottom of the holding assembly is in threaded connection with an auxiliary fixing assembly, a needle knife assembly is slidably connected into the auxiliary fixing assembly, and the end, close to the holding assembly, of the needle knife assembly is clamped into the holding assembly. The needle-knife assembly comprises a flat-blade needle-knife assembly and an inclined-blade needle-knife assembly, and the inclined-blade needle-knife assembly is connected to the flat-blade needle-knife assembly in a sliding mode. The split type needle knife has the function of flexible switching between a flat blade and an inclined blade, different treatment requirements are met through gear transmission by rotating a driving knob, instrument replacement is reduced, the cross infection risk is reduced, the first needle knife handle is provided with a medicine conveying cavity, the medicine conveying cavity is matched with a closed air bag, the medicine conveying state and the closed state can be conveniently controlled, the split type structure is adopted, and the operation is convenient. Installation and disassembly are easy and convenient, equipment can be rapidly assembled and disassembled, all parts can be fully cleaned and disinfected, cross infection is prevented, and the safety of a patient is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to a split-type needle knife. Background Art

[0002] Acupotomy is a closed release procedure between surgical and non-surgical treatments. It combines the concepts of acupuncture in traditional Chinese medicine with the principles of modern surgical scalpels. It can stimulate acupuncture points and dredge meridians, similar to acupuncture, while also cutting diseased tissue to achieve a similar surgical effect, achieving the combined effect of "needle to cure disease"; However, traditional needle knives usually only have a single working state, such as only a flat or beveled blade. When faced with complex and changing treatment scenarios, this single-function needle knife seems inadequate. For example, in certain tissue release treatments, a flat-blade needle knife may be more suitable and can evenly separate tissues; while when tissues need to be cut at a specific angle, a beveled-blade needle knife has more advantages. Because existing needle knives cannot flexibly switch working states, doctors often need to prepare multiple different types of needle knives during the treatment process. Frequent instrument changes not only increase surgical time and reduce treatment efficiency, but may also cause additional harm to the patient due to repeated withdrawal and insertion of the needle knife, increasing the patient's pain and the risk of postoperative complications.

[0003] Therefore, those skilled in the art provide a split-type needle knife to solve the problems raised in the above background technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a split needle knife to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A split needle knife, comprising a grip assembly, wherein the bottom of the grip assembly is threadedly connected to an auxiliary fixing assembly, a needle knife assembly is slidably connected to the auxiliary fixing assembly, and one end of the needle knife assembly close to the grip assembly is clamped in the grip assembly, the needle knife assembly comprises a flat-edge needle knife assembly and an oblique-edge needle knife assembly, and the oblique-edge needle knife assembly is slidably connected to the flat-edge needle knife assembly; The holding assembly is also rotatably connected to a driving assembly and a needle knife switching assembly for driving the bevel-edged needle knife assembly to move out. The end of the bevel-edged needle knife assembly close to the holding assembly passes through the holding assembly and is connected to the needle knife switching assembly in the holding assembly. The holding assembly is also provided with an inflation assembly, and the output end of the inflation assembly is connected to the flat-edged needle knife assembly.

[0006] Preferably: the holding assembly includes a handle, the driving assembly, the needle knife switching assembly and the inflation assembly are all located inside the handle, the bottom of the handle is fixedly connected to a connecting tube, the auxiliary fixing assembly includes an auxiliary fixing sleeve, the outer wall of the auxiliary fixing sleeve is provided with scale lines and a signal reflection area, two groups of mounting grooves are also provided on the end of the auxiliary fixing sleeve close to the holding assembly, and a threaded groove adapted to the connecting tube is also provided on the inner wall of the auxiliary fixing sleeve close to the end of the holding assembly.

[0007] Preferably, the flat-edged needle knife assembly includes a first needle knife handle, one end of which is fixedly connected to the flat-edged needle knife body, a drug delivery cavity is further provided in the first needle knife handle, one end of the drug delivery cavity penetrates the outer wall of the first needle knife handle near the top, and the other end penetrates the flat-edged needle knife body, a closed air bag is fixedly connected to a side of the flat-edged needle knife body near the drug delivery cavity, and the closed air bag covers the drug delivery cavity, and an inflation cavity connected to the closed air bag is further provided in the first needle knife handle and the flat-edged needle knife body; The first needle knife handle is also provided with a sliding groove, and the oblique-blade needle knife assembly is slidably connected to the sliding groove.

[0008] Preferably: the bevel-edged needle knife assembly includes a second needle knife handle, a sliding block is fixedly connected to the side of the second needle knife handle close to the sliding groove, the sliding block is slidably connected in the sliding groove, one end of the second needle knife handle is fixedly connected to the bevel-edged needle knife body, and the other end of the second needle knife handle is fixedly connected to the connecting block, and the connecting block is snap-connected to the needle knife switching assembly in the holding assembly.

[0009] Preferably, the drive assembly includes a drive knob, the drive knob is rotatably connected to the top of the handle, the bottom of the drive knob is fixedly connected to a connecting sleeve, the end of the connecting sleeve away from the drive knob passes through the handle and extends into the handle, and the extended end of the connecting sleeve is fixedly connected to the first bevel gear; The driving assembly also includes a limiting ratchet rotatably connected to the handle, the bottom of the limiting ratchet is connected to the needle knife switching assembly through a connecting shaft, the top of the limiting ratchet is fixedly connected to a second bevel gear, the top of the second bevel gear is fixedly connected to a connecting rod, the first bevel gear is slidably sleeved in the connecting rod, and the end of the connecting rod close to the first bevel gear is also slidably connected to a limiting block, and a limiting pawl is also rotatably connected in the handle, and the limiting pawl is engaged with adjacent teeth on the limiting ratchet.

[0010] Preferably: the needle knife switching assembly includes a switching cylinder, which is rotatably connected to the handle, and the switching cylinder is located directly below the limiting ratchet, the top of the switching cylinder is connected to the limiting ratchet through a connecting shaft, and a synchronization rod is also provided at the bottom of the switching cylinder, which is slidably connected to the handle, and the top of the synchronization rod is fixedly connected to a pushing head, and the pushing head is in contact with the bottom of the switching cylinder, and a second compression spring is also sleeved on the synchronization rod, one end of the second compression spring is fixed to the end of the synchronization rod close to the pushing head, and the other end is fixedly connected to the inner wall of the handle.

[0011] Preferably, a connecting groove is further provided in the handle, and the end of the synchronization rod away from the pushing head passes through and extends into the connecting groove, and two groups of clamping blocks and two groups of release rods are slidably connected in the inner wall of the extended end of the synchronization rod, and the two groups of clamping blocks (65) and the two groups of release rods (66) pass through and extend to the outside of the synchronization rod (62), and the two groups of clamping blocks are clamped with the inner wall of the connecting block, and the ends of the two groups of release rods close to each other are respectively fixedly connected with connecting plates, and the two groups of connecting plates are slidably connected in the synchronization rod, and the bottoms of the two groups of connecting plates are respectively fixed to the adjacent clamping blocks, and two groups of reset springs are also fixedly connected between the two groups of connecting plates.

[0012] Preferably, the inflation assembly includes a synchronous gear, which is rotatably connected to the inner wall of the top of the handle, and a third bevel gear is fixedly connected to the bottom of the synchronous gear, and the third bevel gear is located directly above the first bevel gear. A limiting groove is provided on the inner wall of the top of the handle, and a plurality of sliding columns slidably connected to the limiting grooves are provided on the top of the synchronous gear; One side of the synchronous gear is also rotatably connected to a driven gear, and the driven gear is meshed with the synchronous gear. A connecting rod is hinged at the bottom of the driven gear.

[0013] Preferably, the inflation assembly further comprises a piston cylinder fixedly connected to the handle, a piston rod being slidably connected to the piston cylinder, an end of the piston rod close to the connecting rod being hinged to the connecting rod, an output end of the piston cylinder being connected to a vent pipe, and the other end of the vent pipe being connected to the inflation chamber on the first needle handle; The top of the connecting rod is also fixedly connected with a pointer, and the pointer is rotatably connected to the top of the handle.

[0014] Preferably, an adjustment slot is further provided on one side of the handle close to the connecting slot, a push plate is slidably connected to the adjustment slot, an insertion rod is fixedly connected to the push plate, an end of the insertion rod away from the push plate passes through the adjustment slot and extends into the connecting slot, a slot adapted to the insertion rod is provided on the outer wall of the first needle knife handle, a first compression spring is further sleeved on the insertion rod, one end of the first compression spring is fixed to the push plate, and the other end is fixed to the inner wall of the adjustment slot; A closing cover for covering the connecting groove is also clamped on one side of the handle close to the connecting groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention has the flexible switching function between flat blade and bevel blade working states. The initial state is the flat blade working state. The operator can hold the handle to push the flat blade needle knife assembly to perform tissue loosening and other treatments. When it is necessary to switch to the bevel blade needle knife assembly, it is only necessary to turn the drive knob to drive the switching cylinder to rotate through a series of gear transmissions, and use the inclined surface at the bottom of the switching cylinder to push the pushing head, so that the synchronization rod drives the second needle knife handle to move downward and extend. Turning the drive knob again can realize the upward movement of the second needle knife handle. This flexible function switching method enables one needle knife to meet different treatment needs, reduces the number of instrument replacements, reduces the risk of cross infection, and improves the comprehensiveness and accuracy of treatment.

[0016] 2. In the present invention, the first needle handle is provided with a drug delivery cavity. Initially, the closed airbag is in an inflated state to cover the drug delivery cavity. When drug delivery is required, the driving knob is pulled to engage the relevant gears, and the driving knob is turned to drive the piston cylinder to evacuate air, extract the gas in the closed airbag to shrink it, and expose the drug delivery cavity for drug injection. After the treatment is completed, the driving knob is turned again to inflate the piston cylinder, allowing the closed airbag to be filled and re-cover the drug delivery cavity. In addition, the pointer on the driven gear can rotate with the rotation of the driving knob. The inflation state of the closed airbag can be understood by observing the position of the pointer, which is convenient for the operator to make timely adjustments to ensure the normal use of the drug delivery function and the effective covering of the closed airbag.

[0017] 3. The present invention adopts a split structure, and the installation and disassembly process of each component is clear and simple. When in use, the auxiliary fixing sleeve is installed at the bottom of the handle through the threaded groove, and then the first needle knife handle and the second needle knife handle are connected in sequence and inserted into the auxiliary fixing sleeve. The fixing is achieved by the cooperation between the insertion rod and the slot. When disassembling, the closing cover is removed, the release rod is squeezed to retract the clamping block, and the push plate is pushed to move the insertion rod out of the slot. The needle knife handle can be easily removed and the auxiliary fixing sleeve can be separated. This design facilitates medical staff to quickly assemble and disassemble the equipment before and after operation, saving time and improving work efficiency. It is particularly suitable for emergency treatment scenarios or situations where frequent equipment replacement is required; At the same time, each component can be fully cleaned and disinfected, avoiding incomplete disinfection due to complex structure, effectively preventing cross infection, ensuring the health and safety of patients, while also extending the service life of the equipment and reducing medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the first viewing angle of the present invention; Figure 2 A second perspective schematic diagram of the present invention; Figure 3Schematic diagram of the structure of the handle of the present invention; Figure 4 For the present invention Figure 3 An enlarged schematic diagram of the structure at point A above; Figure 5 This is a schematic diagram of the structure inside the handle of the present invention. Figure 1 ; Figure 6 It is a structural schematic diagram of the clamping block and the release lever in the present invention; Figure 7 Schematic diagram of the partial structure of the drive component in the present invention Figure 1 ; Figure 8 This is a schematic diagram of the structure inside the handle of the present invention. Figure 2 ; Figure 9 It is a partial structural schematic diagram of the inflatable component of the present invention; Figure 10 Schematic diagram of the partial structure of the drive component in the present invention Figure 2 ; Figure 11 Schematic diagram of the structure of the auxiliary fixing sleeve in the present invention; Figure 12 The structure of the flat-edged needle knife assembly in the present invention is shown as follows Figure 1 ; Figure 13 Schematic diagram of the internal structure of the first needle knife handle and the plain-edged needle knife body in the present invention; Figure 14 The structure of the flat-edged needle knife assembly in the present invention is shown as follows Figure 2 ; Figure 15 It is a structural schematic diagram of the oblique-edge needle knife assembly in the present invention.

[0019] In the figure: 1. Gripping assembly; 11. Gripping handle; 12. Closing cover; 13. Connecting slot; 14. Connecting cylinder; 15. Adjusting slot; 16. Push plate; 17. Insertion rod; 18. First compression spring; 19. Limiting slot; 2. Auxiliary fixing assembly; 21. Auxiliary fixing sleeve; 22. Scale line; 23. Signal reflection area; 24. Mounting slot; 25. Threaded slot; 3. Flat-edge needle knife assembly; 31. First needle knife handle; 32. Flat-edge needle knife body; 33. Drug delivery chamber; 34. Closing airbag; 35. Inflating chamber; 36. Sliding slot; 4. Bevel-edge needle knife assembly; 41. Second needle knife handle; 42. Bevel-edge needle knife body; 43. Sliding block; 44. Connecting block; 5. Driving assembly; 51. Driving knob; 52. Connecting sleeve; 53. First bevel gear; 54. Limit ratchet; 55. Second bevel gear; 56. Connecting rod; 57. Limiting block; 58. Limiting pawl; 6. Needle knife switching assembly; 61. Switching cylinder; 62. Synchronizing rod; 63. Second compression spring; 64. Pushing head; 65. Connecting block; 66. Release rod; 67. Connecting plate; 7. Inflating assembly; 71. Synchronizing gear; 72. Third bevel gear; 73. Sliding column; 74. Driven gear; 75. Connecting rod; 76. Piston cylinder; 77. Piston rod; 78. Vent pipe; 79. Pointer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] For example 1, please refer to Figure 1-15 , A split needle knife comprises a gripping assembly 1, the bottom of the gripping assembly 1 is threadedly connected to an auxiliary fixing assembly 2, a needle knife assembly is slidably connected to the auxiliary fixing assembly 2, and the end of the needle knife assembly close to the gripping assembly 1 is clamped in the gripping assembly 1, the needle knife assembly comprises a flat-edged needle knife assembly 3 and a beveled-edged needle knife assembly 4, the beveled-edged needle knife assembly 4 is slidably connected to the flat-edged needle knife assembly 3, and the gripping assembly 1 is also rotatably connected to a driving assembly 5 and a needle knife switching assembly 6 for driving the beveled-edged needle knife assembly 4 to move out, the end of the beveled-edged needle knife assembly 4 close to the gripping assembly 1 passes through the gripping assembly 1 and is connected to the needle knife switching assembly 6 in the gripping assembly 1, and the gripping assembly 1 is provided with a plurality of needle knife components. The assembly 1 is also provided with an inflatable assembly 7, and the output end of the inflatable assembly 7 is connected to the flat-edged needle knife assembly 3. The grip assembly 1 includes a handle 11, and the drive assembly 5, the needle knife switching assembly 6 and the inflatable assembly 7 are all located in the handle 11. The bottom of the handle 11 is fixedly connected to a connecting cylinder 14. The auxiliary fixing assembly 2 includes an auxiliary fixing sleeve 21. The outer wall of the auxiliary fixing sleeve 21 is provided with scale lines 22 and a signal reflection area 23. Two sets of mounting grooves 24 are further provided on the end of the auxiliary fixing sleeve 21 close to the grip assembly 1. A threaded groove 25 that is compatible with the connecting cylinder 14 is also provided on the inner wall of the auxiliary fixing sleeve 21 close to the grip assembly 1. Specifically, when in use, the auxiliary fixing sleeve 21 is first installed on the bottom of the handle 11 through the threaded groove 25, so that the auxiliary fixing sleeve 21 is fixed to the connecting tube 14. After fixing, the flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 are combined and inserted into the auxiliary fixing sleeve 21. The flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 pass through the connecting tube 14 and extend into the handle 11, and the flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 are fixed; At the same time, in order to improve the accuracy of installation, the combined flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 can be inserted into the auxiliary fixing sleeve 21 first, and the flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 are respectively aligned with the driving assembly 5 and the inflation assembly 7 in the handle 11 and slightly inserted, and then 21 is connected to the handle 11. After 21 is fixed, the flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 are pushed into the handle 11 to accurately connect the flat-edge needle knife assembly 3 and the oblique-edge needle knife assembly 4 with the driving assembly 5 and the inflation assembly 7; After fixation, in the initial state, the flat-blade needle knife assembly 3 is slightly longer than the oblique-blade needle knife assembly 4. At this time, it is in the flat-blade working state. The operator holds the handle 11 and pushes the flat-blade needle knife assembly 3 into the patient's body. The flat-blade needle knife assembly 3 performs tissue loosening and other treatments. During insertion, the insertion depth can be observed through the scale line 22 to ensure the effectiveness of the treatment. At the same time, during treatment, the signal reflection area 23 provided on the auxiliary fixing sleeve 21 can be used in conjunction with ultrasound imaging. With the help of the reflected signal received by the ultrasound imaging, the operator can intuitively observe the insertion position of the auxiliary fixing sleeve 21 and the needle knife assembly, ensuring the accuracy of the operation; When it is necessary to switch the bevel-edged needle knife assembly 4 for use, the drive assembly 5 is rotated, and the drive assembly 5 drives the needle knife switching assembly 6 to start, so that the needle knife switching assembly 6 drives the bevel-edged needle knife assembly 4 to extend outward, so that the bevel-edged needle knife assembly 4 extends over the flat-edged needle knife assembly 3. At this time, the needle blade of the flat-edged needle knife assembly 3 is blocked by the bevel-edged needle knife assembly 4 and will not cause damage to the tissue. After the bevel-edged needle knife assembly 4 is extended, the treatment can be continued through the beveled blade of the bevel-edged needle knife assembly 4; When medication is required, first adjust the drive assembly 5 so that the drive assembly 5 is connected to the inflation assembly 7 and no longer drives the needle knife switching assembly 6 to move. At this time, rotate the drive assembly 5, and the drive assembly 5 drives the inflation assembly 7 to start, so that the drug delivery channel on the flat-edge needle knife assembly 3 is opened, and medication can be carried out.

[0023] In this embodiment, the flat-edged needle knife assembly 3 includes a first needle knife handle 31, one end of the first needle knife handle 31 is fixedly connected to the flat-edged needle knife body 32, and a drug delivery cavity 33 is also provided in the first needle knife handle 31, one end of the drug delivery cavity 33 passes through the outer wall of the first needle knife handle 31 near the top, and the other end passes through the flat-edged needle knife body 32, and a closed air bag 34 is fixedly connected to the side of the flat-edged needle knife body 32 near the drug delivery cavity 33, and the closed air bag 34 covers the drug delivery cavity 33, and an inflation cavity 35 connected to the closed air bag 34 is also provided in the first needle knife handle 31 and the flat-edged needle knife body 32, and a sliding groove 36 is also provided on the first needle knife handle 31, and the oblique-edged needle knife assembly 4 is slidably connected to the sliding groove 36, and the oblique-edged needle knife assembly 4 includes a second needle knife handle 41, and a sliding block 43 is fixedly connected to the side of the second needle knife handle 41 near the sliding groove 36, and the sliding block 43 slides Connected to the sliding slot 36, one end of the second needle knife handle 41 is fixedly connected to the bevel-edged needle knife body 42, and the other end of the second needle knife handle 41 is fixedly connected to the connecting block 44, and the connecting block 44 is clamped with the needle knife switching assembly 6 in the grip assembly 1, and an adjusting slot 15 is also provided on the side of the grip 11 near the connecting slot 13, and a push plate 16 is slidably connected in the adjusting slot 15, and an insertion rod 17 is fixedly connected to the push plate 16, and the end of the insertion rod 17 away from the push plate 16 passes through the adjusting slot 15 and extends into the connecting slot 13, a slot adapted to the insertion rod 17 is provided on the outer wall of the first needle knife handle 31, and a first compression spring 18 is also sleeved on the insertion rod 17, one end of the first compression spring 18 is fixed to the push plate 16, and the other end is fixed to the inner wall of the adjusting slot 15, and a closing cover 12 for covering the connecting slot 13 is also clamped on the side of the grip 11 near the connecting slot 13; Specifically, when in use, first, the sliding block 43 on the second needle handle 41 is inserted into the sliding groove 36 to connect the first needle handle 31 with the second needle handle 41. After connection, the second needle handle 41 is pushed upward so that the sliding block 43 is located at the uppermost end of the sliding groove 36. The first needle handle 31 and the second needle handle 41 are inserted into the auxiliary fixing sleeve 21. During insertion, the inflation cavity 35 at the top of the first needle handle 31 is inserted into the output end of the inflation component 7 and communicated with the inflation component 7. When the first needle knife handle 31 and the second needle knife handle 41 are inserted into the handle 11 through the connecting tube 14, the outer wall of the first needle knife handle 31 first pushes the insertion rod 17, causing the insertion rod 17 to retract toward the adjustment slot 15. When the slot on the first needle knife handle 31 coincides with the insertion rod 17, the insertion rod 17 is inserted into the slot driven by the first compression spring 18, so that the first needle knife handle 31 is fixed. At the same time, the connecting block 44 on the top of the second needle knife handle 41 is engaged with the needle knife switching assembly 6, so that the second needle knife handle 41 is fixed to the needle knife switching assembly 6, completing the fixing work of the needle knife assembly; After fixation, the flat-edged needle knife body 32 or the oblique-edged needle knife body 42 is selected for treatment according to the needs; When use is completed, first remove the closing cover 12 to expose the connecting groove 13, push the push plate 16, so that the push plate 16 drives the insertion rod 17 to move out of the slot, and at the same time adjust the needle knife switching assembly 6 to separate the needle knife switching assembly 6 from the connecting block 44, remove the first needle knife handle 31 and the second needle knife handle 41 from the handle 11, and then remove the auxiliary fixing sleeve 21 from the connecting tube 14 to complete the overall disassembly work, which is convenient for disinfection.

[0024] The bottom of the connecting sleeve 52 is fixedly connected to the first bevel gear 53, and the driving assembly 5 also includes a limit ratchet 54 rotatably connected to the handle 11. The bottom of the limit ratchet 54 is connected to the needle knife switching assembly 6 through a connecting shaft. The top of the limit ratchet 54 is fixedly connected to the second bevel gear 55, and the top of the second bevel gear 55 is fixedly connected to the connecting rod 56. The first bevel gear 53 is slidably sleeved in the connecting rod 56. The end of the connecting rod 56 close to the first bevel gear 53 is also slidably connected to the limit block 57. The handle 11 is also rotatably connected to a limit pawl 58, and the limit pawl 58 is engaged with the adjacent teeth on the limit ratchet 54. Specifically, during use, when it is necessary to switch the first needle knife handle 31 and the second needle knife handle 41, the auxiliary fixing sleeve 21 is first pulled to make the auxiliary fixing sleeve 21 drive the flat-edge needle knife assembly 3 and the bevel-edge needle knife assembly 4 to move slightly upward, and the driving knob 51 is turned. In the initial state, the first bevel gear 53 at the bottom of the driving knob 51 is engaged with the second bevel gear 55. When the driving knob 51 is rotated, the driving knob 51 drives the first bevel gear 53 to rotate through the connecting sleeve 52. The first bevel gear 53 also drives the second bevel gear 55 to rotate. When the second bevel gear 55 rotates, it drives the limiting ratchet 54 to rotate, so that the limiting ratchet 54 drives the needle knife switching assembly 6 to rotate. When the needle knife switching assembly 6 rotates, it drives the second needle knife handle 41 to be adjusted through the connecting block 44, so that the second needle knife handle 41 moves outward, and the second needle knife handle 41 is switched to the working position; When the adjustment of the second needle knife handle 41 is completed, the driving knob 51 is stopped. At this time, the limiting ratchet 54 is fixed under the action of the limiting pawl 58, thereby fixing the needle knife switching assembly 6 and preventing it from moving, so that the second needle knife handle 41 remains stable. When the inflatable component 7 needs to be used, the driving knob 51 is lifted upward, so that the driving knob 51 drives the connecting sleeve 52 and the first bevel gear 53 to move upward, and the first bevel gear 53 slides upward in the connecting rod 56. When the first bevel gear 53 slides to disengage from the connecting rod 56, the two sets of limiting blocks 57 in the connecting rod 56 pop out outward to limit the first bevel gear 53. At the same time, the first bevel gear 53 is engaged with the inflatable component 7. At this time, the driving knob 51 is turned, and the driving knob 51 drives the inflatable component 7 through the first bevel gear 53 to start inflation; When inflation is completed, the driving knob 51 is pushed down again, and the thrust of the first bevel gear 53 pushes the two sets of limit blocks 57 to retract into the connecting rod 56, and the first bevel gear 53 can slide on the connecting rod 56 again.

[0025] In this embodiment, the needle knife switching assembly 6 includes a switching cylinder 61, which is rotatably connected to the handle 11, and the switching cylinder 61 is located directly below the limiting ratchet 54. The top of the switching cylinder 61 is connected to the limiting ratchet 54 through a connecting shaft. A synchronization rod 62 is also provided at the bottom of the switching cylinder 61, and the synchronization rod 62 is slidably connected to the handle 11. The top of the synchronization rod 62 is fixedly connected to a pushing head 64, and the pushing head 64 is in contact with the bottom of the switching cylinder 61. A second compression spring 63 is also sleeved on the synchronization rod 62, and one end of the second compression spring 63 is fixed to one end of the synchronization rod 62 close to the pushing head 64, and the other end is fixedly connected to the inner wall of the handle 11. There is also a A connecting groove 13 is provided, and one end of the synchronization rod 62 away from the pushing head 64 passes through and extends into the connecting groove 13. Two groups of clamping blocks 65 and two groups of release rods 66 are slidably connected in the inner wall of the extended end of the synchronization rod 62, and the two groups of clamping blocks (65) and the two groups of release rods (66) all pass through and extend to the outside of the synchronization rod (62). The two groups of clamping blocks 65 are clamped with the inner wall of the connection block 44, and the ends of the two groups of release rods 66 close to each other are fixedly connected with connecting plates 67, and the two groups of connecting plates (67) are slidably connected in the synchronization rod (62). The bottoms of the two groups of connecting plates 67 are respectively fixed to the adjacent clamping blocks 65, and two groups of reset springs are also fixedly connected between the two groups of connecting plates 67. Specifically, when the second needle handle 41 is inserted into the grip 11, the connecting block 44 is simultaneously clamped into the bottom of the synchronization rod 62, and the two sets of clamping blocks 65 on the synchronization rod 62 are clamped in the connecting block 44, so that the synchronization rod 62 and the second needle handle 41 are fixed; When the first bevel gear 53 drives the limiting ratchet 54 to rotate, the limiting ratchet 54 drives the switching cylinder 61 to rotate through the connecting shaft. In the initial state, the highest point of the bottom of the switching cylinder 61 contacts the pushing head 64. When the switching cylinder 61 rotates, the inclined surface of the bottom of the switching cylinder 61 continuously pushes the pushing head 64 until the lowest point of the bottom of the switching cylinder 61 contacts the pushing head 64. Under the push of the switching cylinder 61, the pushing head 64 drives the synchronization rod 62 to move downward. When the synchronization rod 62 moves downward, it also pushes the second needle handle 41 downward, causing the second needle handle 41 to extend outward. When the second needle handle 41 is fully extended, the driving knob 51 is stopped, and the limiting ratchet 54 remains stationary under the limit of the limiting pawl 58, so that the switching cylinder 61 remains stationary, and the second needle handle 41 remains extended, and treatment is carried out; When the treatment is completed and the second needle handle 41 and the first needle handle 31 need to be switched again, the driving knob 51 is turned again, so that the limit ratchet 54 drives the switching cylinder 61 to continue to rotate, so that the highest point of the bottom of the switching cylinder 61 moves to above the pushing head 64. At this time, the synchronization rod 62 drives the second needle handle 41 to move upward under the action of the rebound force of the second compression spring 63, completing the switching between the second needle handle 41 and the first needle handle 31; When disassembling after use, the closing cover 12 is removed, and the release rods 66 are exposed. The two release rods 66 are squeezed inward, and the two release rods 66 drive the two clamping blocks 65 to retract into the synchronization rod 62 through the connecting plate 67, and move out of the connecting block 44, so that the connecting block 44 can be removed from the synchronization rod 62.

[0026] In this embodiment, the inflation component 7 includes a synchronous gear 71, which is rotatably connected to the inner wall of the top of the handle 11. The bottom of the synchronous gear 71 is fixedly connected to the third bevel gear 72, and the third bevel gear 72 is located directly above the first bevel gear 53. A limiting groove 19 is provided on the inner wall of the top of the handle 11. The top of the synchronous gear 71 is provided with multiple groups of sliding columns 73 that are slidably connected to the limiting groove 19. One side of the synchronous gear 71 is also rotatably connected to a driven gear 74, and the driven gear 74 is connected to the synchronous gear 71. The step gear 71 is meshed with each other, and the bottom of the driven gear 74 is hinged with a connecting rod 75. The inflation component 7 also includes a piston cylinder 76 fixedly connected to the handle 11. A piston rod 77 is slidably connected to the piston cylinder 76. The end of the piston rod 77 close to the connecting rod 75 is hinged to the connecting rod 75. The output end of the piston cylinder 76 is connected to a ventilation pipe 78, and the other end of the ventilation pipe 78 is connected to the inflation chamber 35 on the first needle handle 31. The top of the connecting rod 75 is also fixedly connected to a pointer 79, and the pointer 79 is rotatably connected to the top of the handle 11. Specifically, initially, the sealing airbag 34 is in an inflated state, blocking the drug delivery cavity 33. When the drug delivery cavity 33 needs to be exposed, the driving knob 51 is first pulled to engage the first bevel gear 53 with the third bevel gear 72. When the driving knob 51 is rotated, the first bevel gear 53 drives the third bevel gear 72 to rotate, thereby driving the synchronous gear 71 to rotate. The synchronous gear 71 drives the driven gear 74 to rotate, causing the driven gear 74 to pull the connecting rod 75 and the piston rod 77 to move. The piston rod 77 slides in the piston cylinder 76, causing the piston cylinder 76 to perform a pumping movement, and the gas in the sealing airbag 34 on the first needle handle 31 is extracted through the vent tube 78, causing the sealing airbag 34 to shrink. The shrinking sealing airbag 34 no longer blocks the drug delivery cavity 33. At this time, the operator can inject liquid medicine through the drug delivery cavity 33 for treatment. When the treatment is completed, the driving knob 51 is rotated again, causing the connecting rod 75 to pull the piston rod 77 toward the piston cylinder 76 to perform inflation. The gas in the piston cylinder 76 is injected into the closed airbag 34 through the vent tube 78, filling the closed airbag 34 and covering the drug delivery cavity 33 again. When the driving knob 51 drives the driven gear 74 to rotate through the first bevel gear 53 and the synchronous gear 71, the pointer 79 on the driven gear 74 rotates at the same time. The pointer 79 rotates one circle to complete one inflation and deflation operation. By observing the position of the pointer 79, the inflation status of the closed airbag 34 can be understood, which is convenient for the operator to make timely adjustments.

[0027] The working principle of the present invention is: When in use, first install the auxiliary fixing sleeve 21 on the bottom of the handle 11 through the threaded groove 25, so that the auxiliary fixing sleeve 21 is fixed to the connecting tube 14, and after fixing, the sliding block 43 on the second needle handle 41 is inserted into the sliding groove 36 to connect the first needle handle 31 with the second needle handle 41, and the second needle handle 41 is pushed upward so that the sliding block 43 is located at the uppermost end of the sliding groove 36, and the first needle handle 31 and the second needle handle 41 are inserted into the auxiliary fixing sleeve 21. When inserted, the first needle handle 31 and the second needle handle 41 are The outer wall of the needle handle 31 pushes the insertion rod 17, causing the insertion rod 17 to retract into the adjustment slot 15. When the slot on the first needle handle 31 coincides with the insertion rod 17, the insertion rod 17 is inserted into the slot driven by the first compression spring 18, so that the first needle handle 31 is fixed. When the second needle handle 41 is inserted into the grip 11, the connecting block 44 is simultaneously engaged with the bottom of the synchronization rod 62. The two sets of connecting blocks 65 on the synchronization rod 62 are engaged in the connecting block 44, so that the synchronization rod 62 and the second needle handle 41 are fixed. In the initial state, the flat-blade needle knife assembly 3 is slightly longer than the oblique-blade needle knife assembly 4. At this time, it is in the flat-blade working state. The operator holds the handle 11 and pushes the flat-blade needle knife assembly 3 into the patient's body. The flat-blade needle knife assembly 3 performs tissue loosening and other treatments. During insertion, the insertion depth can be observed through the scale line 22 to ensure the effectiveness of the treatment. At the same time, during treatment, the signal reflection area 23 provided on the auxiliary fixing sleeve 21 can be used in conjunction with ultrasound imaging. With the help of the reflected signal received by the ultrasound imaging, the operator can intuitively observe the insertion position of the auxiliary fixing sleeve 21 and the needle knife assembly, ensuring the accuracy of the operation; When it is necessary to switch the beveled blade needle knife assembly 4 for use, first pull the auxiliary fixing sleeve 21, so that the auxiliary fixing sleeve 21 drives the flat blade needle knife assembly 3 and the beveled blade needle knife assembly 4 to move slightly upward, and turn the driving knob 51. In the initial state, the first bevel gear 53 at the bottom of the driving knob 51 is engaged with the second bevel gear 55. When the driving knob 51 is turned, the driving knob 51 drives the first bevel gear 53 to rotate through the connecting sleeve 52, and the first bevel gear 53 simultaneously drives the second bevel gear 55 to rotate. When the second bevel gear 55 rotates The limit ratchet 54 is driven to rotate, and the limit ratchet 54 drives the switching cylinder 61 to rotate through the connecting shaft. In the initial state, the highest point of the bottom of the switching cylinder 61 contacts the pushing head 64. When the switching cylinder 61 rotates, the inclined surface of the bottom of the switching cylinder 61 continuously pushes the pushing head 64 until the lowest point of the bottom of the switching cylinder 61 contacts the pushing head 64. The pushing head 64 drives the synchronization rod 62 downward under the push of the switching cylinder 61. When the synchronization rod 62 moves downward, it also pushes the second needle handle 41 downward, causing the second needle handle 41 to extend outward. When the second needle handle 41 is fully extended, the driving knob 51 is stopped, and the limiting ratchet 54 remains stationary under the limit of the limiting pawl 58, so that the switching cylinder 61 remains stationary, and the second needle handle 41 remains extended, and treatment is carried out; When the treatment is completed and the second needle knife handle 41 and the first needle knife handle 31 need to be switched again, the auxiliary fixing sleeve 21 is pulled again, so that the auxiliary fixing sleeve 21 drives the flat-edge needle knife assembly 3 and the bevel-edge needle knife assembly 4 to move slightly upward, and the driving knob 51 is turned to make the limit ratchet 54 drive the switching cylinder 61 to continue to rotate, so that the highest point of the bottom of the switching cylinder 61 moves to above the pushing head 64. At this time, the synchronization rod 62 drives the second needle knife handle 41 to move upward under the action of the rebound force of the second compression spring 63, completing the switching between the second needle knife handle 41 and the first needle knife handle 31; Initially, the sealing airbag 34 is in an inflated state, covering the medicine delivery cavity 33. When the medicine delivery cavity 33 needs to be exposed for medicine delivery, the driving knob 51 is first pulled to engage the first bevel gear 53 with the third bevel gear 72. When the driving knob 51 is rotated, the first bevel gear 53 drives the third bevel gear 72 to rotate, thereby driving the synchronous gear 71 to rotate. The synchronous gear 71 drives the driven gear 74 to rotate, causing the driven gear 74 to pull the connecting rod 75 and the piston rod 77 to move. The piston rod 77 slides in the piston cylinder 76, causing the piston cylinder 76 to perform a pumping movement, and the gas in the sealing airbag 34 on the first needle handle 31 is extracted through the vent tube 78, causing the sealing airbag 34 to shrink. The deflated sealing airbag 34 no longer blocks the medicine delivery cavity 33. At this time, the operator can inject liquid medicine through the medicine delivery cavity 33 for treatment. When the treatment is completed, the driving knob 51 is rotated again, causing the connecting rod 75 to pull the piston rod 77 toward the piston cylinder 76 to perform inflation. The gas in the piston cylinder 76 is injected into the closed airbag 34 through the vent tube 78, filling the closed airbag 34 and covering the drug delivery cavity 33 again. When the driving knob 51 drives the driven gear 74 to rotate through the first bevel gear 53 and the synchronous gear 71, the pointer 79 on the driven gear 74 rotates at the same time. The pointer 79 rotates one circle to complete one inflation and deflation operation. By observing the position of the pointer 79, the inflation status of the closed airbag 34 can be understood, which facilitates the operator to make timely adjustments. When disassembly is required after use, the closing cover 12 is removed, and the release rod 66 is exposed. The two release rods 66 are squeezed inward, and the two release rods 66 drive the two clamping blocks 65 to retract into the synchronization rod 62 through the connecting plate 67 and move out of the connecting block 44. The connecting block 44 can be removed from the synchronization rod 62, and the push plate 16 is pushed so that the push plate 16 drives the insertion rod 17 to be removed from the slot. The first needle handle 31 can be removed, and after the first needle handle 31 and the second needle handle 41 are removed from the grip 11, the auxiliary fixing sleeve 21 is removed from the connecting cylinder 14. The overall disassembly work can be completed, which is convenient for disinfection.

[0028] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0029] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A split needle knife, characterized by: The invention comprises a holding assembly (1), wherein the bottom of the holding assembly (1) is threadedly connected to an auxiliary fixing assembly (2), a needle knife assembly is slidably connected to the auxiliary fixing assembly (2), and an end of the needle knife assembly close to the holding assembly (1) is clamped in the holding assembly (1), the needle knife assembly comprises a flat-edge needle knife assembly (3) and an oblique-edge needle knife assembly (4), and the oblique-edge needle knife assembly (4) is slidably connected to the flat-edge needle knife assembly (3); The holding assembly (1) is also rotatably connected to a driving assembly (5) and a needle knife switching assembly (6) for driving the oblique-edge needle knife assembly (4) to move out. The end of the oblique-edge needle knife assembly (4) close to the holding assembly (1) passes through the holding assembly (1) and is connected to the needle knife switching assembly (6) in the holding assembly (1). The holding assembly (1) is also provided with an inflation assembly (7), and the output end of the inflation assembly (7) is connected to the flat-edge needle knife assembly (3).

2. The split-type needle knife according to claim 1, characterized in that: The holding assembly (1) includes a handle (11), the driving assembly (5), the needle knife switching assembly (6) and the inflation assembly (7) are all located in the handle (11), the bottom of the handle (11) is fixedly connected to a connecting tube (14), the auxiliary fixing assembly (2) includes an auxiliary fixing sleeve (21), the outer wall of the auxiliary fixing sleeve (21) is provided with a scale line (22) and a signal reflection area (23), the auxiliary fixing sleeve (21) is also provided with two groups of mounting grooves (24) on one end close to the holding assembly (1), and the inner wall of the auxiliary fixing sleeve (21) is also provided with a threaded groove (25) adapted to the connecting tube (14) on one end close to the holding assembly (1).

3. The split-type needle knife according to claim 1, characterized in that: The flat-edged needle knife assembly (3) includes a first needle knife handle (31), one end of which is fixedly connected to a flat-edged needle knife body (32), and a drug delivery cavity (33) is further provided in the first needle knife handle (31), one end of which penetrates the outer wall of the first needle knife handle (31) near the top, and the other end penetrates the flat-edged needle knife body (32), a closed air bag (34) is fixedly connected to one side of the flat-edged needle knife body (32) near the drug delivery cavity (33), and the closed air bag (34) covers the drug delivery cavity (33), and an inflation cavity (35) connected to the closed air bag (34) is further provided in the first needle knife handle (31) and the flat-edged needle knife body (32); The first needle knife handle (31) is also provided with a sliding groove (36), and the oblique-blade needle knife assembly (4) is slidably connected to the sliding groove (36).

4. The split-type needle knife according to claim 3, characterized in that: The oblique-edged needle knife assembly (4) includes a second needle knife handle (41), a sliding block (43) is fixedly connected to a side of the second needle knife handle (41) close to the sliding groove (36), and the sliding block (43) is slidably connected in the sliding groove (36). One end of the second needle knife handle (41) is fixedly connected to the oblique-edged needle knife body (42), and the other end of the second needle knife handle (41) is fixedly connected to a connecting block (44), and the connecting block (44) is snap-connected to the needle knife switching assembly (6) in the holding assembly (1).

5. The split-type needle knife according to claim 2, characterized in that: The driving assembly (5) includes a driving knob (51), the driving knob (51) is rotatably connected to the top of the handle (11), the bottom of the driving knob (51) is fixedly connected to a connecting sleeve (52), an end of the connecting sleeve (52) away from the driving knob (51) passes through the handle (11) and extends into the handle (11), and the extended end of the connecting sleeve (52) is fixedly connected to a first bevel gear (53); The driving assembly (5) further includes a limiting ratchet (54) rotatably connected to the handle (11), the bottom of the limiting ratchet (54) is connected to the needle knife switching assembly (6) via a connecting shaft, the top of the limiting ratchet (54) is fixedly connected to a second bevel gear (55), the top of the second bevel gear (55) is fixedly connected to a connecting rod (56), the first bevel gear (53) is slidably sleeved in the connecting rod (56), and the end of the connecting rod (56) close to the first bevel gear (53) is also slidably connected to a limiting block (57), and a limiting pawl (58) is also rotatably connected to the handle (11), and the limiting pawl (58) is engaged with adjacent teeth on the limiting ratchet (54).

6. The split-type needle knife according to claim 4 or 5, characterized in that: The needle knife switching assembly (6) includes a switching cylinder (61), which is rotatably connected to the handle (11) and is located directly below the limiting ratchet (54). The top of the switching cylinder (61) is connected to the limiting ratchet (54) through a connecting shaft. A synchronization rod (62) is also provided at the bottom of the switching cylinder (61). The synchronization rod (62) is slidably connected to the handle (11). The top of the synchronization rod (62) is fixedly connected to a pushing head (64), and the pushing head (64) contacts the bottom of the switching cylinder (61). A second compression spring (63) is also sleeved on the synchronization rod (62), one end of the second compression spring (63) is fixed to one end of the synchronization rod (62) close to the pushing head (64), and the other end is fixedly connected to the inner wall of the handle (11).

7. The split-type needle knife according to claim 6, characterized in that: A connecting groove (13) is also provided in the handle (11), and one end of the synchronization rod (62) away from the pushing head (64) passes through and extends into the connecting groove (13). Two groups of clamping blocks (65) and two groups of release rods (66) are slidably connected in the inner wall of the extended end of the synchronization rod (62), and the two groups of clamping blocks (65) and the two groups of release rods (66) all pass through and extend to the outside of the synchronization rod (62). The two groups of clamping blocks (65) are clamped with the inner wall of the connecting block (44), and the ends of the two groups of release rods (66) close to each other are fixedly connected with connecting plates (67), and the two groups of connecting plates (67) are slidably connected in the synchronization rod (62). The bottoms of the two groups of connecting plates (67) are respectively fixed to the adjacent clamping blocks (65), and two groups of return springs are fixedly connected between the two groups of connecting plates (67).

8. The split-type needle knife according to claim 7, characterized in that: The inflation assembly (7) includes a synchronous gear (71), the synchronous gear (71) is rotatably connected to the inner wall of the top of the handle (11), the bottom of the synchronous gear (71) is fixedly connected to a third bevel gear (72), and the third bevel gear (72) is located directly above the first bevel gear (53), a limiting groove (19) is provided on the inner wall of the top of the handle (11), and a plurality of sliding columns (73) slidably connected to the limiting groove (19) are provided on the top of the synchronous gear (71); One side of the synchronous gear (71) is also rotatably connected to a driven gear (74), and the driven gear (74) is meshed with the synchronous gear (71). A connecting rod (75) is hinged at the bottom of the driven gear (74).

9. The split-type needle knife according to claim 8, characterized in that: The inflation assembly (7) further comprises a piston cylinder (76) fixedly connected to the handle (11), a piston rod (77) being slidably connected to the piston cylinder (76), an end of the piston rod (77) close to the connecting rod (75) being hinged to the connecting rod (75), an output end of the piston cylinder (76) being connected to a vent pipe (78), and the other end of the vent pipe (78) being connected to the inflation chamber (35) on the first needle handle (31); The top of the connecting rod (75) is also fixedly connected to a pointer (79), and the pointer (79) is rotatably connected to the top of the handle (11).

10. The split-type needle knife according to claim 7, characterized in that: An adjusting groove (15) is further provided on one side of the handle (11) near the connecting groove (13), a push plate (16) is slidably connected to the adjusting groove (15), an insert rod (17) is fixedly connected to the push plate (16), an end of the insert rod (17) away from the push plate (16) passes through the adjusting groove (15) and extends into the connecting groove (13), a slot adapted to the insert rod (17) is provided on the outer wall of the first needle knife handle (31), a first compression spring (18) is further sleeved on the insert rod (17), one end of the first compression spring (18) is fixed to the push plate (16), and the other end is fixed to the inner wall of the adjusting groove (15); A closing cover (12) for shielding the connecting groove (13) is also clamped on one side of the handle (11) close to the connecting groove (13).

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