Medical stapler

Abstract

The present invention relates to the field of medical device technology, and in particular to a medical stapler. The medical stapler comprises: a handle mechanism, including a main handle, on which a lumen is provided; a puncture mechanism, including a puncture tube and an inner core, at least the distal portion of the inner core is inserted into the puncture tube, the proximal portion of the puncture tube and the proximal portion of the inner core are both located in the lumen, and the distal portion of the puncture tube extends out of the handle mechanism; a first locking mechanism, which detachably connects the puncture tube to the main handle; a second locking mechanism, which is detachably connected to the inner core; a pushing mechanism, which is connected to the second locking mechanism and is slidably arranged relative to the handle mechanism along the length direction of the puncture tube to drive the second locking mechanism to move, thereby driving the inner core to move along the length direction of the puncture tube. The medical stapler provided by the present invention realizes a split setting, which greatly reduces medical consumables and greatly reduces the cost of use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a medical suturing device. Background Art

[0002] Meniscus suture is the most commonly used surgical method for treating meniscus injury. During the operation, the doctor needs to hold the handle of the suture device and implant the fixed object in the suture device into the tearing part through external pressure. Then, the driving part on the handle of the implanter drives the pushing part to push the implant out of the suture device and implant it into the repair part. At present, the meniscus repair suture device is a disposable consumable material that is injection molded together with metal parts and plastic parts. It cannot be disassembled, resulting in high cost of use. At the same time, the one-piece molding of the meniscus repair suture device in the prior art determines that part of it must be made of plastic material, and the related accessories of the plastic material suture device are all processed and produced by injection molding. However, there is a certain error in the precision of the accessories produced by the injection molding process, and the parts are not tightly matched, resulting in the phenomenon of "shaking" during the meniscus suture device operation, causing the implant to not slide out smoothly. In addition, the strength of the injection molded parts is low, and the suture device is easy to break when it is subjected to excessive force during the implantation process. All of the above technical problems will lead to surgical failure and increase surgical risks. Summary of the invention

[0003] The purpose of the present invention is to provide a medical stapler to solve the technical problems in the prior art to a certain extent, that the meniscus stapler cannot be disassembled and is a disposable consumable, resulting in a high cost of use; in addition, since some parts of the meniscus stapler must be made of plastic material, the meniscus stapler will shake during use, resulting in the implant not being able to slide out smoothly and the stapler being easy to break, which in turn leads to technical problems in the failure of the operation.

[0004] The present invention provides a medical stapler, comprising: a handle mechanism, comprising a main handle, on which a lumen is provided; a puncture mechanism, comprising a puncture tube and an inner core, at least a distal portion of the inner core is inserted into the puncture tube, a proximal portion of the puncture tube and a proximal portion of the inner core are both located in the lumen, and a distal portion of the puncture tube extends out of the handle mechanism; a first locking mechanism, which detachably connects the puncture tube to the main handle; a second locking mechanism, which is detachably connected to the inner core; a pushing mechanism, which is connected to the second locking mechanism and is slidably arranged relative to the handle mechanism along the length direction of the puncture tube to drive the second locking mechanism to move, thereby driving the inner core to move along the length direction of the puncture tube.

[0005] When using the medical suturing device provided by the present invention, the puncture tube equipped with the implant is connected to the main handle through the first locking mechanism, and the inner core is connected to the second locking mechanism. The handle mechanism is held by hand to extend the distal end of the puncture tube into a specified position, and then the pushing mechanism is driven to drive the inner core to move along the distal end of the puncture tube through the second locking mechanism, thereby delivering the implant in the puncture tube to the specified position. After the delivery of the implant is completed, the puncture tube and the inner core are disassembled, and the medical suturing device can be used again after the puncture tube and the inner core are reinstalled.

[0006] Furthermore, the proximal end of the inner core extends out of the proximal end of the puncture tube, and the outer wall of the main handle is provided with an external thread and a plurality of connecting holes connected to the tube cavity; the first locking mechanism includes an external locking ring and a plurality of clamping blocks, and the plurality of clamping blocks correspond one-to-one to the plurality of connecting holes, one end of the clamping block is located on the outer wall of the main handle, and the other end can pass through the connecting hole and abut against the puncture tube; the inner wall of the outer locking ring is provided with an internal thread matching the external thread, and the outer locking ring is also sleeved outside the clamping block so that the clamping block can clamp the puncture tube.

[0007] Furthermore, an installation groove is provided on the outer wall of the main handle, and the installation groove is connected to the connecting hole; the clamping block includes a ring, a spring sheet and a clamping column connected in sequence, the ring and the spring sheet can be clamped in the installation groove, and the clamping column passes through the connecting hole and abuts against the puncture tube; the outer locking ring is sleeved outside the ring and at least part of the spring sheet.

[0008] Furthermore, the puncture mechanism also includes a depth limiting sleeve and a push button connected to each other; the distal end of the puncture tube passes through the depth limiting sleeve and extends out of the depth limiting sleeve; the push button is connected to the main handle and can move relative to the main handle along the length direction of the puncture tube to adjust the length of the puncture tube extending out of the depth limiting sleeve.

[0009] Furthermore, a platform portion is provided at the distal end of the main handle, a slide groove extending along the length direction of the puncture tube is provided at the platform portion, and a plurality of limit holes arranged at intervals along the length direction of the puncture tube are provided on the platform portion; the push button includes a press plate, a cross beam, a main body and a connecting column, the cross beam is connected between the press plate and the main body, the connecting column is arranged on the main body, and a limit column is provided on the main body; the press plate is located outside the handle mechanism, the cross beam can move along the slide groove, the connecting column is connected to the depth limiting sleeve, and the limit column is engaged with the limit hole.

[0010] Further, the pushing mechanism includes a pushing handle and a partition, a cavity is formed in the pushing handle, the partition is connected to the pushing handle and is located in the cavity, and the partition divides the cavity into an inner cavity and an outer cavity arranged in sequence along the radial direction; the distal end of the main handle is provided with the tubular cavity, the proximal end of the main handle is provided with an installation cavity connected to the tubular cavity, the proximal end portion of the main handle is inserted into the outer cavity, and at least a portion of the partition is inserted into the installation cavity; the handle mechanism also includes an outer shell, which is radially located outside the outer wall of the pushing handle, and the outer shell is connected to the main handle by fasteners.

[0011] Furthermore, the second locking mechanism comprises a chuck; the proximal end of the inner core is clamped in the chuck, and the chuck is connected to the inner wall of the partition through threads.

[0012] Further, the chuck includes a first section and a second section that are connected to each other; a plurality of clamp arms arranged at intervals along the circumference of the second section are provided at one end of the second section away from the first section, and a bevel is provided at one end of the clamp arm away from the second section; the first section is threadedly connected to the partition; the second locking mechanism includes a locking sleeve, a locking groove is provided at one end of the locking sleeve, an inclined section matching the bevel is provided in the locking groove, and the second section is threadedly connected to the locking groove.

[0013] Furthermore, the second locking mechanism also includes a locking tail cap, which is rotatably connected to the proximal end of the shell, and is provided with a matching groove with a polygonal cross-section; at least the cross-section of the part of the locking sleeve away from the locking groove is a polygonal setting that matches the matching groove, and the tail of the locking sleeve is inserted into the matching groove.

[0014] Furthermore, the push handle is provided with an annular rolling groove, and a ball is arranged in the rolling groove; the inner wall of the shell is provided with a folded line guide groove, and each folded line of the guide groove is arranged along a spiral.

[0015] Furthermore, a slot is provided at the distal end of the partition, a spring is provided in the slot, and an end of the spring away from the slot abuts against the distal end of the mounting cavity.

[0016] Furthermore, the pushing handle is provided with a strip hole extending along the length direction of the puncture tube; and the fastener passes through the strip hole to connect the shell and the main handle.

[0017] Furthermore, a limiting plate is provided at the proximal end of the main handle, a through hole is provided at the bottom of the partition, and the limiting plate passes through the through hole.

[0018] Furthermore, the pushing mechanism further includes a pushing ring, which is arranged at the distal end of the pushing handle and has a portion extending in the radial direction.

[0019] Furthermore, the material of the medical stapler is metal.

[0020] The medical stapler provided by the present invention has at least the following beneficial effects:

[0021] The medical stapler provided by the present invention is configured in a split manner, the inner core and the puncture tube can be used once, and the remaining parts of the medical stapler can be reused, which greatly reduces medical consumables and greatly reduces the cost of use. Moreover, the medical stapler is configured in a split manner, which is conducive to realizing that the handle mechanism 1 of the medical stapler is made of metal material, avoiding the use of plastic material for injection molding. The metal handle mechanism 1 has high strength and precision, which is conducive to avoiding the "shaking" of the stapler during surgery, thereby avoiding the implant from sliding out smoothly, reducing or even avoiding the problem of the stapler being easily broken when subjected to excessive force during the implantation process, thereby reducing the risk of surgery and improving the success rate of surgery.

[0022] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic structural diagram of a medical stapler according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A cross-sectional view of a medical stapler shown;

[0026] Figure 3 for Figure 1 A partial structural schematic diagram of a medical stapler shown;

[0027] Figure 4 for Figure 3 A partial cross-sectional view of a medical stapler shown;

[0028] Figure 5 for Figure 1A structural schematic diagram of a main handle in the handle mechanism shown in FIG.

[0029] Figure 6 for Figure 5 A schematic structural diagram of the main handle from another perspective shown;

[0030] Figure 7 for Figure 5 A cross-sectional view of the main handle is shown;

[0031] Figure 8 for Figure 1 A schematic structural diagram of a puncture mechanism in a medical stapler is shown;

[0032] Fig. 9 for Figure 8 A schematic diagram of the structure of a push button in the puncture mechanism shown;

[0033] Fig.10 for Figure 1 A schematic structural diagram of a first locking mechanism in a medical stapler shown;

[0034] Fig.11 for Fig.10 A cross-sectional view of the first locking mechanism shown;

[0035] Fig.12 for Fig.10 A schematic structural diagram of an outer locking ring in the first locking mechanism shown;

[0036] Fig.13 for Fig.10 A cross-sectional view of an outer locking ring in the first locking mechanism shown;

[0037] Fig.14 for Fig.10 A structural schematic diagram of a pressing block in the first locking mechanism shown from one perspective;

[0038] Fig.15 for Fig.10 A schematic structural diagram of a pressing block in the first locking mechanism shown in another perspective;

[0039] Fig.16 for Figure 3 A schematic diagram of the structure of a clamp in a second locking mechanism of a medical stapler shown;

[0040] Fig.17 for Figure 3 A cross-sectional view of a clamp in a second locking mechanism of a medical stapler shown;

[0041] Fig.18 for Figure 3 A schematic structural diagram of a locking sleeve in a second locking mechanism in a medical stapler shown;

[0042] Fig.19 for Figure 3 A cross-sectional view of a locking sleeve in a second locking mechanism in a medical stapler shown;

[0043] Fig. 20 for Figure 1 A schematic structural diagram of a pushing mechanism in a medical stapler from one perspective is shown;

[0044] Fig.21 for Fig. 20 A structural schematic diagram of the pushing mechanism from another perspective shown;

[0045] Fig. 22 for Fig. 20 A cross-sectional view of the push mechanism shown;

[0046] Fig.23 for Figure 1 A schematic diagram of the structure of the locking tail cap and the outer shell in the medical stapler shown;

[0047] Fig.24 for Figure 1 A cross-sectional view of the locking tail cap and the housing in a medical stapler is shown.

[0048] icon:

[0049] 1-handle mechanism; 11-main handle; 111-tube cavity; 112-installation cavity; 113-installation groove; 114-connection hole; 115-platform; 116-slide groove; 117-limiting hole; 118-limiting plate; 12-housing; 121-guide groove; 122-first tail hook;

[0050] 2-puncture mechanism; 21-puncture tube; 211-inner tube; 212-outer tube; 22-inner core; 23-depth limiting sleeve; 24-push button; 241-press plate; 242-crossbeam; 243-main body; 244-connecting column; 245-limiting column;

[0051] 3-first locking mechanism; 31-external locking ring; 311-internal thread; 32-pressing block; 321-holding ring; 322-spring; 323-pressing column;

[0052] 4-second locking mechanism; 41-chuck; 411-first section; 412-second section; 413-clamp arm; 414-inclined surface; 42-locking sleeve; 421-locking groove; 422-inclined section; 43-locking tail cap; 431-matching groove; 432-second tail hook;

[0053] 5-push mechanism; 51-push handle; 511-inner cavity; 512-outer cavity; 513-rolling groove; 514-strip hole; 52-partition plate; 53-ball; 54-slot; 55-spring; 56-perforation; 57-push ring. DETAILED DESCRIPTION

[0054] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0055] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0056] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0060] It should be noted that “far” refers to the direction that needs to be extended into the treatment position, and “near” refers to the direction opposite to “far”.

[0061] like Figures 1 to 24As shown, the present invention provides a medical suturing instrument, comprising a handle mechanism 1, comprising a main handle 11, on which a lumen 111 is provided; a puncture mechanism 2, comprising a puncture tube 21 and an inner core 22, at least the distal end portion of the inner core 22 is penetrated in the puncture tube 21, the proximal end portion of the puncture tube 21 and the proximal end portion of the inner core 22 are both located in the lumen 111, and the distal end portion of the puncture tube 21 extends out of the handle mechanism 1; a first locking mechanism 3, which detachably connects the puncture tube 21 to the main handle 11; a second locking mechanism 4, which is detachably connected to the inner core 22; a pushing mechanism 5, which is connected to the second locking mechanism 4, and is slidably arranged relative to the handle mechanism 1 along the length direction of the puncture tube 21, so as to drive the second locking mechanism 4 to move, thereby driving the inner core 22 to move along the length direction of the puncture tube 21.

[0062] When using the medical suturing device provided in this embodiment, the puncture tube 21 containing the implant is connected to the main handle 11 through the first locking mechanism 3, and the inner core 22 is connected to the second locking mechanism 4. The handle mechanism 1 is held by hand to extend the distal end of the puncture tube into the designated position, and then the pushing mechanism is driven to drive the inner core 22 to move along the distal end of the puncture tube 21 through the second locking mechanism 4, so as to deliver the implant in the puncture tube 21 to the designated position. After the delivery of the implant is completed, the puncture tube 21 and the inner core 22 are disassembled, and the medical suturing device can be used again after the puncture tube 21 and the inner core 22 are reinstalled.

[0063] The medical stapler provided in this embodiment is configured in a split manner, the inner core 22 and the puncture tube 21 can be used once, and the remaining parts of the medical stapler can be reused, which greatly reduces medical consumables and greatly reduces the cost of use. Moreover, the medical stapler is configured in a split manner, which is conducive to the use of metal material for the handle mechanism 1 of the medical stapler, avoiding the use of plastic material for injection molding. The metal handle mechanism 1 has high strength and precision, which is conducive to avoiding the "shaking" of the stapler during the operation, thereby preventing the implant from sliding out smoothly, reducing or even avoiding the problem of the stapler being easily broken when subjected to excessive force during the implantation process, thereby reducing the risk of surgery and improving the success rate of surgery.

[0064] Optionally, the medical stapler is made of metal, so that the doctor's stapler has good strength and high reliability.

[0065] The puncture tube 21 may be a whole tube. Alternatively, the puncture tube 21 includes an inner tube 211 and an outer tube 212 sleeved outside the inner tube 211, the inner tube 211 and the outer tube 212 may be fixed as a whole by welding, the distal end of the inner tube 211 extends out of the distal end of the outer tube 212, the distal end of the inner tube 211 is arranged in a needle shape and can be extended into a designated position, the puncture tube 21 includes the inner tube 211 and the outer tube 212, which can improve the strength of the puncture tube 21, while avoiding the distal end of the puncture tube 21 being too thick to increase the wound surface, and reduce the impact on the patient, at this time, the first locking mechanism 3 can detachably connect the outer tube 212 to the main handle 11.

[0066] The first locking mechanism 3 can have various structural forms, for example, the proximal end of the puncture tube 21 is clamped on the main handle 11 .

[0067] As an alternative, Figures 10 to 15 As shown, the proximal end of the inner core 22 extends out of the proximal end of the puncture tube 21, and the outer wall of the main handle 11 is provided with an external thread and a plurality of connecting holes 114 connected to the lumen 111; the first locking mechanism 3 includes an outer locking ring 31 and a plurality of clamping blocks 32, and the plurality of clamping blocks 32 correspond to the plurality of connecting holes 114 one by one (optionally, the plurality of clamping blocks 32 are arranged at intervals along the circumferential direction of the main handle 11, so that the puncture tube 21 can be clamped at multiple points), one end of the clamping block 32 is located on the outer wall of the main handle 11, and the other end can pass through the connecting hole 114 and abut against the puncture tube 21; the inner wall of the outer locking ring 31 is provided with an internal thread 311 matching the external thread, and the outer locking ring 31 is also sleeved on the outside of the clamping block 32 so that the clamping block 32 can clamp the puncture tube 21.

[0068] In this embodiment, the outer locking ring 31 is sleeved outside the plurality of clamping blocks 32, and the outer locking ring 31 is rotated so that the inner thread 311 of the outer locking ring 31 engages with the outer thread on the main handle 11, thereby fixing the outer locking ring 31 on the main handle 11. In this process, the outer locking ring 31 presses the plurality of clamping blocks 32 against the puncture tube 21, so that the plurality of clamping blocks 32 hold the puncture tube 21 tightly, thereby fixing the puncture tube 21. When the puncture tube 21 needs to be removed, the outer locking ring 31 is rotated in the opposite direction so that the outer locking ring 31 releases the plurality of clamping blocks 32, so that the clamping blocks 32 release the puncture tube 21, and then the puncture tube 21 can be replaced. The first locking mechanism 3 of this structure is simple in structure, easy to operate, and can lock the puncture tube 21 firmly and reliably, which can further reduce the failure rate of surgical operation.

[0069] The portion of the pressing block 32 located outside the main handle 11 can be directly attached to the outer wall of the main handle 11 .

[0070] As an alternative, Figures 10 to 15As shown, the outer wall of the main handle 11 is also provided with a mounting groove 113, which is connected to the connecting hole 114; the pressing block 32 includes a ring 321, a spring 322 and a pressing column 323 connected in sequence, the ring 321 and the spring 322 can be clamped in the mounting groove 113 (the mounting groove 113 includes a part for accommodating the ring 321 and a part for accommodating the spring 322), and the pressing column 323 passes through the connecting hole 114 and abuts against the puncture tube 21; the outer locking ring 31 is sleeved outside the ring 321 and at least part of the spring 322. Such a configuration can make the structure of the medical suture device regular and the outer locking ring 31 easy to process.

[0071] In this embodiment, the spring piece 322 is initially outwardly extended (extended in a direction away from the main handle 11) and has a certain elasticity. The outer locking ring 31 is rotated to make the outer locking ring 31 move in a straight line, thereby covering the spring piece 322 to press the spring piece 322 toward the installation groove 113. The spring piece 322 can be deformed and close to the main handle 11 under the action of the outer locking ring 31, thereby driving the clamping column 323 to be pressed on the puncture tube 21.

[0072] The number of the pressing blocks 32 can be three, four, five or six. Optionally, the number of the pressing blocks 32 is two, which are symmetrically arranged relative to the main handle 11. Correspondingly, the number of the mounting grooves 113 is two.

[0073] Optionally, a structure for increasing friction is provided on the end surface of the clamping column 323 in contact with the puncture tube 21 , for example, a groove or a protrusion is provided on the end surface to increase the friction between the clamping column 323 and the puncture tube 21 .

[0074] As an alternative, Fig.13 As shown, the inner wall of the outer locking ring 31 has an inclined surface, which can be consistent with the outward angle of the spring sheet 322. Such a setting can realize that the locking ring gradually presses the spring sheet 322 into the installation groove 113 during the process of completely covering the spring sheet 322, and gradually presses the pressing column 323 against the puncture tube 21.

[0075] The cross-section of the pressing column 323 may be in the shape of a triangle, a quadrilateral, an ellipse or a circle.

[0076] like Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, based on any of the above embodiments, the puncture mechanism 2 further includes a depth limiting sleeve 23 and a push button 24 that are interconnected; the distal end of the puncture tube 21 passes through the depth limiting sleeve 23 and extends out of the depth limiting sleeve 23; the push button 24 is connected to the main handle 11 and can move relative to the main handle 11 along the length direction of the puncture tube 21 to adjust the length of the puncture tube 21 extending out of the depth limiting sleeve 23.

[0077] In this embodiment, the driving push button 24 moves relative to the main handle 11 along the length direction of the puncture tube 21, thereby changing the position of the depth limiting sleeve 23 relative to the main handle 11, and then adjusting the length of the puncture tube 21 extending out of the depth limiting sleeve 23, that is, adjusting the distance from the distal end of the puncture tube 21 to the distal end of the depth limiting sleeve 23, so that the penetration depth of the puncture tube 21 can be adjusted according to specific needs, which is convenient for doctors to use and further reduces the failure rate of surgical operations.

[0078] Specifically, Figures 5 to 7 As shown, a platform portion 115 is provided at the distal end of the main handle 11, and a slide groove 116 extending along the length direction of the puncture tube 21 is provided at the platform portion 115, and a plurality of limit holes 117 are provided on the platform portion 115 and are arranged at intervals along the length direction of the puncture tube 21; the push button 24 includes a pressing plate 241, a cross beam 242, a main body 243 and a connecting column 244, the cross beam 242 is connected between the pressing plate 241 and the main body 243, the connecting column 244 is arranged on the main body 243, and a limit column 245 is provided on the main body 243; the pressing plate 241 is located outside the handle mechanism 1, the cross beam 242 can move along the slide groove 116, the connecting column 244 is connected to the depth limiting sleeve 23 (it can be connected and fixed by interference fit), and the limit column 245 is clamped with the limit hole 117.

[0079] In this embodiment, when it is necessary to adjust the extended length of the puncture tube 21, the pressing plate 241 can be pressed to disengage the limiting column 245 from the current limiting hole 117. After driving the push button 24 to move to a suitable position, the limiting column 245 is inserted into the corresponding limiting hole 117, thereby changing the position of the push button 24 relative to the main handle 11, and then changing the position of the depth limiting sleeve 23, and finally changing the length of the puncture tube 21 extending out of the depth limiting sleeve 23.

[0080] Optionally, the platform portion 115 can be symmetrically arranged on the main handle 11, and two push plates 241 can be symmetrically arranged on the main body 243 to facilitate hand operation, and the limiting columns 245 can be symmetrically arranged to make the connection between the push button 24 and the main handle 11 more secure.

[0081] like Figures 1 to 4 , Figure 20 to Figure 22 As shown, on the basis of any of the above embodiments, further, the pushing mechanism 5 includes a pushing handle 51 and a partition 52, a cavity is formed in the pushing handle 51, the partition 52 is connected to the pushing handle 51 and is located in the cavity, the partition 52 divides the cavity into an inner cavity 511 and an outer cavity 512 which are arranged in sequence along the radial direction (which can be the radial direction of the puncture tube 21); a lumen 111 is provided at the distal end of the main handle 11, and a mounting cavity 112 connected to the lumen 111 is provided at the proximal end of the main handle 11, the proximal end portion of the main handle 11 is inserted into the outer cavity 512, and at least a portion of the partition 52 is inserted into the mounting cavity 112; the handle mechanism 1 also includes an outer shell 12, and in the radial direction, the outer shell 12 is located outside the outer wall of the pushing handle 51, and the outer shell 12 is connected to the main handle 11 by fasteners.

[0082] In this embodiment, along the radial direction of the puncture tube 21, the partition 52, the main handle 11, the push handle 51 and the shell 12 are arranged in sequence from the inside to the outside, and the partition 52 and the main handle 11 are interlaced with each other, so that the medical suturing device has a compact structure and a small volume, which is more convenient for doctors to use. The shell 12 is arranged on the outside of the push handle 51, which is more convenient for doctors to hold.

[0083] It is understandable that a portion of the push handle 51 (preferably the distal end of the push handle 51 ) is located outside the housing 12 to facilitate driving the push handle 51 to move the inner core 22 .

[0084] Optionally, the pushing mechanism 5 also includes a pushing ring 57, which is arranged at the distal end of the pushing handle 51 (it can be understood that the distal end of the pushing handle 51 is located outside the outer shell 12, and the pushing ring 57 is located outside the outer shell 12), and the pushing ring 57 has a radially extending portion, which is convenient for the doctor's fingers to push the pushing ring 57 to move, thereby driving the entire pushing mechanism 5 to move.

[0085] Based on the above embodiments, the second locking mechanism 4 can have various structural forms. For example, the second locking mechanism 4 includes a locking seat arranged in the inner cavity 511 and a slot arranged on the locking seat, and the inner core 22 is clamped in the slot.

[0086] As an alternative, Figure 4 , Fig.16 and Fig.17 As shown, the second locking mechanism 4 includes a clamp 41; the proximal end of the inner core 22 is clamped in the clamp 41, and the clamp 41 is connected to the inner wall of the partition 52 by threads.

[0087] In this embodiment, the inner core 22 is clamped by the chuck 41, and then the chuck 41 is threadedly connected to the partition 52 to achieve a detachable connection of the inner core 22. Compared with the snap connection, this connection method is more convenient and avoids the inner core 22 being bent and damaged when the inner core 22 is snapped in with force, further reducing consumables and reducing the cost of use.

[0088] The clamping head 41 may include arms that are arranged opposite to each other, and a tension spring is arranged between the two arms. The tension spring tensions the two arms against each other, thereby clamping and fixing the inner core 22.

[0089] As an alternative, Figure 4 , Figures 16 to 19As shown, the chuck 41 includes a first section 411 and a second section 412 that are connected to each other (the diameter of the first section 411 can be set to be larger than the diameter of the second section 412, and threads are set on the outer walls of the first section 411 and the second section 412); the end of the second section 412 away from the first section 411 is provided with a plurality of clamping arms 413 arranged at intervals along the circumference of the second section 412, and the end of the clamping arms 413 away from the second section 412 is provided with an inclined surface 414; the first section 411 is threadedly connected to the partition 52; the second locking mechanism 4 includes a locking sleeve 42, one end of the locking sleeve 42 is provided with a locking groove 421, the locking groove 421 is provided with an inclined section 422 that cooperates with the inclined surface 414, and the second section 412 is threadedly connected to the locking groove 421.

[0090] In this embodiment, the thread of the first section 411 cooperates with the thread on the partition 52, so as to realize the connection between the chuck 41 and the partition 52. When installing the inner core 22, the proximal end of the inner core 22 can be inserted into the main handle 11 from the distal end of the main handle 11, and then inserted between the multiple clamp arms 413 after passing through the catheter cavity 111, the installation cavity 112, the first section 411, and the second section 412 in sequence. The multiple clamp arms 413 are inserted into the locking groove 421, and the locking sleeve is rotated so that the locking sleeve moves in the direction close to the first section 411. In this process, the inclined surface 414 of the clamp arm 413 contacts the inclined section 422 of the locking groove 421. Under the action of the inclined surface 414 and the inclined section 422, the multiple clamp arms 413 approach the inner core 22 and gradually clamp the inner core 22. The thread in the locking groove 421 cooperates with the thread on the second section 412, so as to realize the fixing of the locking sleeve 42 and the chuck 41, and then realize the fixing of the inner core 22. The locking sleeve 42 and the chuck 41 cooperate to clamp the inner core 22. The inner core 22 can be fixed and released by rotating the locking sleeve 42 to lock the chuck 41 and release the chuck 41, avoiding the need to remove the chuck 41 before installing the inner core 22, thereby avoiding the need to remove more parts to complete the installation of the inner core 22, greatly facilitating the installation of the inner core 22 and making it convenient to use to a great extent.

[0091] The second end of the locking sleeve 42 can be directly driven to drive the locking sleeve 42 to rotate.

[0092] As an alternative, Figure 4 , Fig.23 and Fig.24 As shown, the second locking mechanism 4 also includes a locking tail cap 43, which is rotatably connected to the proximal end of the shell 12, and is provided with a matching groove 431 with a polygonal cross-section (the matching groove 431 can be a through hole or a blind hole); at least the cross-section of the portion of the locking sleeve 42 away from the locking groove 421 is a polygonal setting (for example, a triangle, a quadrilateral, a pentagon, a hexagon, a heptagon or an octagon, etc.) that matches the matching groove 431, and the tail of the locking sleeve 42 is inserted into the matching groove 431.

[0093] In this embodiment, when the push handle 51 is driven to move linearly, the inner core 22, the chuck 41 and the locking sleeve move synchronously. The locking tail cap 43 is set. On the one hand, the proximal end of the outer shell 12, the proximal end of the push handle 51 and the proximal end of the main handle 11 can be blocked, so that the entire structure of the medical stapler is regular and has good sealing, and impurities are reduced from entering the doctor's stapler; on the other hand, by rotating the locking tail cap 43, the locking sleeve can be driven to rotate, and the locking tail cap 43 can increase the hand operation area and is more convenient to use. Through the cooperation of the polygonal groove and the shaft, the locking tail cap 43 can drive the locking sleeve 42 to rotate, but avoid interfering with the locking sleeve 42 to follow the linear movement of the push handle 51. Instead, the movement of the locking sleeve 42 is limited, so that the movement of the locking sleeve 42 is stable, and further the movement of the inner core 22 is stable.

[0094] Among them, there are many ways to rotatably connect the locking tail cap 43 and the outer shell 12, for example: the two are connected by a bearing; or, an annular groove is correspondingly set on the locking tail cap 43 and the outer shell 12, and a ball 53 is arranged in the annular groove; optionally, a first tail hook 122 is set on the outer shell 12, and a second tail hook 432 is set on the locking tail cap 43, and the first tail hook 122 and the second tail hook 432 are hooked together, with a simple structure and convenient installation.

[0095] On the basis of the above embodiment, in order to further improve the movement of the push handle 51 to be more stable, a limiting structure may be provided between the push handle 51 and the main handle 11 or between the push handle 51 and the housing 12 to support and limit the movement of the push handle 51. For example, the limiting structure includes a guide groove and a guide bar, one of which is provided on the push handle 51, and the other is provided on the push handle 51 or the housing 12.

[0096] As an alternative, Figure 3 and Fig.24 As shown, the push handle 51 is provided with an annular rolling groove 513, and the rolling groove 513 is provided with a ball 53; the inner wall of the shell 12 is provided with a zigzag guide groove 121, and each zigzag section of the guide groove 121 is arranged along a spiral, that is, each zigzag section extends both axially and axially (the length direction of the puncture tube 21), and the distance between the highest point and the lowest point of the zigzag guide groove 121 in the length direction of the puncture tube 21 can be set to be the maximum stroke of the inner core 22, and the ball 53 can rotate in the rolling groove 513, and can also achieve 360-degree rotation under the restriction of the guide groove 121, so that not only the movement of the push handle 51 is restricted, but also jamming can be avoided, so that the movement of the ball 53 is smooth, thereby ensuring the effective movement of the push handle 51.

[0097] like Figure 2 and Fig. 22As shown, based on the above embodiment, further, a slot 54 is provided at the distal end of the partition 52 , a spring 55 is provided in the slot 54 , and one end of the spring 55 away from the slot 54 abuts against the distal end of the mounting cavity 112 .

[0098] In this embodiment, when the pushing handle 51 is driven to move toward the distal direction, the spring 55 is compressed. After the implant delivery is completed, the spring 55 can push the partition plate 52 back, thereby driving the pushing handle 51 to reset, further facilitating use.

[0099] like Figure 4 , Fig.21 and Fig. 22 As shown, based on the above embodiment, further, a strip hole 514 extending along the length direction of the puncture tube 21 is provided on the pushing handle 51; a fastener passes through the strip hole 514 to connect the shell 12 and the main handle 11.

[0100] In the present embodiment, a fastener is arranged to pass through the strip hole 514, which, on the one hand, realizes the connection between the outer shell 12 and the main handle 11, and on the other hand, the fastener slides in the strip hole 514 relative to the pushing handle 51. Due to the restrictions at both ends of the strip hole 514, the stroke of the pushing handle 51 can be limited, making the pushing stroke more accurate and more convenient for the use of the medical suturing device.

[0101] The number of the strip holes 514 may be one, two, or three, etc., and may be set as required.

[0102] like Figure 2 , Fig.21 and Fig. 22 As shown, based on the above embodiment, further, a limit plate 118 is provided at the proximal end of the main handle 11, and a through hole 56 is provided at the bottom of the partition 52 (the part where the partition 52 is connected to the pushing handle 51), and the limit plate 118 passes through the through hole 56.

[0103] In this embodiment, the limit plate 118 of the main handle 11 passes through the through hole 56 on the partition plate 52, which can further limit the movement stroke of the push handle 51 and make the push handle 51 and the main handle 11 more compact.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In the description provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means being within the scope of the present invention and forming different embodiments.

Claims

1. A medical stapler, characterized in that: include: The handle mechanism comprises a main handle, wherein the main handle is provided with a lumen; The puncture mechanism comprises a puncture tube and an inner core, wherein at least a distal portion of the inner core is inserted into the puncture tube, a proximal portion of the puncture tube and a proximal portion of the inner core are both located in the tube cavity, and a distal portion of the puncture tube extends out of the handle mechanism; A first locking mechanism, detachably connecting the puncture tube to the main handle; a second locking mechanism, detachably connected to the inner core; A pushing mechanism connected to the second locking mechanism and slidably arranged relative to the handle mechanism along the length direction of the puncture tube to drive the second locking mechanism to move, thereby driving the inner core to move along the length direction of the puncture tube; The proximal end of the inner core extends out of the proximal end of the puncture tube, and the outer wall of the main handle is provided with an external thread and a plurality of connection holes communicating with the tube cavity; The first locking mechanism comprises an outer locking ring and a plurality of pressing blocks, wherein the plurality of pressing blocks correspond to the plurality of connecting holes one by one, one end of the pressing block is located on the outer wall of the main handle, and the other end can pass through the connecting hole and abut against the puncture tube; an inner thread matching the outer thread is provided on the inner wall of the outer locking ring, and the outer locking ring is also sleeved outside the pressing block so that the pressing block can press the puncture tube; The pushing mechanism comprises a pushing handle and a partition, a cavity is formed in the pushing handle, and the partition is connected to the pushing handle and is located in the cavity; The second locking mechanism comprises a chuck; the proximal end of the inner core is clamped in the chuck, and the chuck is connected to the inner wall of the partition through threads.

2. The medical stapler according to claim 1, characterized in that: The outer wall of the main handle is also provided with a mounting groove, and the mounting groove is communicated with the connecting hole; The clamping block includes a ring, a spring and a clamping column connected in sequence, the ring and the spring can be clamped in the installation groove, the clamping column passes through the connecting hole and abuts against the puncture tube; the outer locking ring is sleeved outside the ring and at least part of the spring.

3. The medical stapler according to claim 1, characterized in that: The puncture mechanism also includes a depth limiting sleeve and a push button that are connected to each other; the distal end of the puncture tube passes through the depth limiting sleeve and extends out of the depth limiting sleeve; the push button is connected to the main handle and can move relative to the main handle along the length direction of the puncture tube to adjust the length of the puncture tube extending out of the depth limiting sleeve.

4. The medical stapler according to claim 3, characterized in that: A platform portion is provided at the distal end of the main handle, a slide groove extending along the length direction of the puncture tube is provided at the platform portion, and a plurality of limiting holes spaced apart along the length direction of the puncture tube are provided on the platform portion; The push button includes a push plate, a crossbeam, a main body and a connecting column, the crossbeam is connected between the push plate and the main body, the connecting column is arranged on the main body, and the main body is provided with a limit column; the push plate is located outside the handle mechanism, the crossbeam can move along the slide groove, the connecting column is connected to the depth limiting sleeve, and the limit column is clamped with the limit hole.

5. The medical stapler according to any one of claims 1 to 4, characterized in that: The partition separates the cavity into an inner cavity and an outer cavity which are sequentially arranged along the radial direction; The distal end of the main handle is provided with the lumen, the proximal end of the main handle is provided with a mounting cavity communicated with the lumen, the proximal end of the main handle is partially inserted into the outer cavity, and at least a portion of the partition is inserted into the mounting cavity; The handle mechanism further comprises a shell, which is located radially outside the outer wall of the pushing handle, and is connected to the main handle via a fastener.

6. The medical stapler according to claim 5, characterized in that: The clamp comprises a first section and a second section connected to each other; a plurality of clamp arms spaced along the circumference of the second section are provided at one end of the second section away from the first section, and a slope is provided at one end of the clamp arm away from the second section; the first section is threadedly connected to the partition; The second locking mechanism comprises a locking sleeve, one end of which is provided with a locking groove, the locking groove is provided with an inclined section matched with the inclined surface, and the second section is connected to the locking groove by threads.

7. The medical stapler according to claim 6, characterized in that: The second locking mechanism further comprises a locking tail cap, the locking tail cap is rotatably connected to the proximal end of the housing, and the locking tail cap is provided with a matching groove with a polygonal cross section; At least the cross section of the portion of the locking sleeve away from the locking groove is in a polygonal shape that matches the matching groove, and the tail of the locking sleeve is inserted into the matching groove.

8. The medical stapler according to claim 5, characterized in that: The push handle is provided with an annular rolling groove, and a ball is arranged in the rolling groove; A folded-line guide groove is provided on the inner wall of the shell, and each folded line of the guide groove is arranged along a spiral.

9. The medical stapler according to claim 5, characterized in that: A slot is provided at the distal end of the partition, a spring is provided in the slot, and one end of the spring away from the slot abuts against the distal end of the mounting cavity.

10. The medical stapler according to claim 5, characterized in that: The pushing handle is provided with a strip hole extending along the length direction of the puncture tube; the fastener passes through the strip hole to connect the shell and the main handle.

11. The medical stapler according to claim 5, characterized in that: A limiting plate is provided at the proximal end of the main handle, a through hole is provided at the bottom of the partition, and the limiting plate passes through the through hole.

12. The medical stapler according to claim 5, characterized in that: The pushing mechanism further includes a pushing ring, which is arranged at the distal end of the pushing handle and has a portion extending in the radial direction.

13. The medical stapler according to claim 1, characterized in that: The material of the medical suturing device is metal.

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