Nail pushing block, nail bin and anastomat

Abstract

The invention belongs to the field of anastomats, and particularly relates to a nail pushing block, a nail bin and an anastomat, the nail pushing block comprises a suturing nail pushing block, two elastic plates capable of elastically deforming are arranged at one end of the suturing nail pushing block, and clamping blocks are arranged on the end faces of the elastic plates in an inward protruding and extending mode; the inner sides of the two clamping blocks and the end faces of the two elastic plates define a nail containing groove used for containing a nail body of a suturing nail, and the ends of the two clamping blocks form a notch of the nail containing groove in a spaced mode. The nail groove, the stitching nail pushing block and the stitching nail are matched with one another and do not move relatively, and after the stitching nail pushing block leaves the nail groove, the nail body can be separated from the stitching nail pushing block.

Description

Technical Field

[0001] This invention belongs to the field of staplers, specifically relating to a stapler pusher, staple cartridge, and stapler. Background Technology

[0002] Anastomosing devices are medical devices used to replace manual suturing. Their main working principle is to use titanium staples to cut or anastomose tissue, similar to a stapler.

[0003] Currently, conventional staplers consist of a staple cartridge, a staple pusher, a staple anchor, staples, and a cover plate. Existing staple cartridges have the following problems with the staple pusher and staples: after installation into the staple slot, they are relatively loose and can move along the slot. Current solutions involve placing the end of the staple pusher against the cover plate, while the end of the staple abuts against a detachable staple cartridge limiting cover on the staple cartridge's exit surface for restraint. Both the cover plate and the limiting cover together restrain the staple pusher and staples. The limiting cover is only opened after the staple cartridge is installed into the stapler head and before surgery. However, if violent shaking occurs after opening the limiting cover, there is a risk that the staples may fall off the staple cartridge's exit surface, causing surgical accidents.

[0004] Several solutions have been proposed to address this problem, such as the Chinese patent application "CN202110186507.0 - A staple anti-drop mechanism for staple cartridge of an anastomosis device" and the Chinese patent application "CN201010113718.3 - Staple cartridge of a surgical linear cutting suture device". The former has a complex anti-drop structure, is difficult to manufacture, and is not suitable for widespread application. The latter's anti-drop structure is limited to preventing staples from falling off the pusher block, but the sliding of the pusher block cannot be avoided. Therefore, there is still the problem that the pusher block carries the staples from the staple slot into the staple exit surface of the staple cartridge. Moreover, the reliability of the anti-drop is low. Therefore, there is an urgent need for a pusher block and staple anti-drop structure with a simple structure and high reliability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pusher block, staple cartridge and stapler that, when the staple pusher block is in the staple slot, the staple slot, the staple and the staple cooperate with each other without relative movement, and can complete the separation of the staple body from the staple pusher block after the staple pusher block leaves the staple slot.

[0006] This invention discloses a nail pusher block, comprising a nail pusher block, with two elastically deformable plates at one end of the pusher block. Engaging blocks protrude inward from the end faces of the elastic plates. The inner sides of the two engaging blocks and the end faces of the two elastic plates enclose a nail-receiving groove for accommodating the nail body. The ends of the two engaging blocks are spaced apart to form openings in the nail-receiving groove. When the nail pusher block is placed in the nail groove of the nail cartridge, the two elastic plates elastically abut against the inner wall of the nail pusher groove, and the openings are relatively close together, locking the nail body within the nail-receiving groove. When the end of the nail pusher block leaves the nail groove from the nail outlet surface of the nail cartridge, the two elastic plates are released from their restraints and open, the openings are relatively open, and the nail body can detach from the openings.

[0007] Furthermore, when the slots are in a relatively open state, the diameter of the nail body is larger than the opening width of the slot. Furthermore, there is a gap between the two elastic plates, which communicates with the bottom of the nail-receiving slot. Furthermore, a connecting piece is provided on the bottom of the nail-receiving slot, connecting the two sides of the gap; when the slots are in a relatively open state, the connecting piece supports the nail body and limits the maximum opening angle of the slot. Furthermore, an arc-shaped groove is provided on the inner side of the end face of the elastic plate, and two opposing arc-shaped grooves form a semi-circular groove. Furthermore, a concave section is provided in the middle of the nail pusher block, dividing the elastic plate into two elastic arms, with the nail body of one nail connected to both elastic arms. Furthermore, a nail pusher block reset mechanism is also included, which drives the nail pusher block to reset towards the nail pusher slot after the nail pusher block pushes the nail to complete the sewing action.

[0008] The present invention also provides a staple cartridge, including a staple box, a staple pusher slider, a cover plate, a plurality of staples, and a plurality of the aforementioned staple pusher blocks; the staple box is provided with a pusher groove, and the staple box is provided with a staple pusher groove on at least one side of the pusher groove, the staple pusher groove including a plurality of staple slots penetrating both ends of the staple box and a trigger groove connecting a row of staple slots, and a staple pusher block is slidably disposed in each staple slot, the staple body of the staple being fitted into the staple receiving slot of the staple pusher block.

[0009] The present invention also provides a stapler, including an operating part and a head, the head including an anvil and the aforementioned staple cartridge; the anvil and staple cartridge are connected to the operating part at one end near the operating part; the operating part includes an operating handle and a blade body telescopically disposed on the operating handle.

[0010] The beneficial effects of this invention are as follows: The suture pusher block provided by this invention forms a suture receiving groove by using two mutually opening elastic plates and a locking block at the end of the suture pusher block. The opening of the receiving groove can adaptively open or close depending on whether the suture pusher block is inside or outside the groove. On the one hand, when the suture pusher block is inside the groove, the groove, the suture pusher block, and the suture will cooperate without relative movement. During the transport of the suture cartridge, and during the installation and opening of the suture cartridge seal by medical personnel, the groove, the suture pusher block, and the suture will not move, avoiding the possibility of the suture falling out prematurely due to improper transportation or operation before surgery, thus preventing surgical accidents. On the other hand, after the suture pusher block leaves the groove, the suture body can be completely detached from the suture pusher block. The suture pusher block provided by this invention requires no driving mechanism, and the locking structure is achieved through the elastic deformation capability of the elastic plates, preventing jamming and effectively ensuring the working stability of the suture pusher block. In addition, the present invention is also applicable to a stapler in which the staple pusher block is only triggered by the staple pusher slider in the part with tissue (Chinese patent application: CN118453018A a staple cartridge, stapler and stapler and stapler method), which moves the staple pusher block along the staple groove for suturing. At this time, when there is no tissue in the corresponding position in the clamping cavity, the staple pusher block at that position will not be triggered, and thus remains stably in the staple groove, preventing the staple from falling into the patient's body from the bottom of the staple groove and through the staple exit surface. Attached Figure Description

[0011] Appendix Figure 1 This is a partial structural diagram of the anastomosis device in this invention; attached. Figure 2 This is a front view of the anastomosis device head in this invention; (See attached image) Figure 3 For the appendix Figure 2 Sectional view along line AA; attached Figure 4 For the appendix Figure 2 Sectional view along the BB direction; attached Figure 5 This is a schematic diagram of the structure of the anastomosis device head after the cover plate is hidden; (See attached diagram) Figure 6 This is a top view of the anastomosis device head after the cover plate has been hidden; (Attached) Figure 7 For the appendix Figure 6 Central CC-direction sectional view; attached Figure 8 For the appendix Figure 6 Sectional view along the DD direction; attached Figure 9 This is an exploded view of the anastomosis device head from a first angle in this invention; attached. Figure 10 This is a second-angle exploded view of the anastomosis device head in this invention; attached. Figure 11 This is a schematic diagram of the structure of the first embodiment of the push-pin block assembly in this invention; attached. Figure 12 This is a schematic diagram of the first angle structure of the second embodiment of the pusher block assembly in this invention; attached. Figure 13 This is a schematic diagram of the second angle structure of the pusher block assembly in the second embodiment of the present invention; attached. Figure 14 This is a bottom view of the second embodiment of the pusher block assembly in this invention; attached. Figure 15 For the appendix Figure 14 Cross-sectional view of the guide rod and sliding hole in the middle EE direction (first embodiment of the fit between the guide rod and the sliding hole); Appendix Figure 16 For the appendix Figure 14 Cross-sectional view along the EE direction (initial state of the second mating embodiment of the guide rod and sliding hole); Appendix Figure 17 For the appendix Figure 14 Cross-sectional view along the EE direction (spring compression state of the second mating embodiment of the guide rod and sliding hole); Appendix Figure 18 This is a front view of the second embodiment of the pusher block assembly in this invention; attached. Figure 19 For the appendix Figure 18 Enlarged view of a section at point F (when the staple pusher is inside the staple groove); attached Figure 20 For the appendix Figure 18 Enlarged view of a section at point F (when the staple pusher is outside the staple groove); attached. Figure 21 This is a schematic diagram of the nail box structure in this invention (without perforations); (See attached diagram) Figure 22 This is a schematic diagram of the third embodiment of the pusher block assembly in this invention; attached. Figure 23 This is a schematic diagram of the nail box structure in the third embodiment of the present invention (with perforation); (See attached diagram) Figure 24 This is a cross-sectional view of the stapler head in the third embodiment of the pusher block assembly of the present invention; attached. Figure 25 This is a schematic diagram of the structure of the pusher block and the sewing nail in this invention; attached. Figure 26 This is a front sectional view of the pusher block reset mechanism in this invention when an elastic tension member is used; (See attached image) Figure 27 This is a schematic diagram of the structure of the pusher block in the present invention when the pusher block is set on the side of the trigger block.

[0012] In the diagram, 1-nail holder; 11-push-blade groove; 12-nail groove; 13-trigger groove; 131-bottom surface; 1311-perforation; 14-mounting surface; 15-nail exit surface; 2-nail pusher slider; 21-sliding part; 22-trigger part; 3-cover plate; 4-clamping cavity; 5-nail pusher block; 51-trigger block; 511-limiting surface; 512-trigger surface; 5121-insertion bevel; 5122-sewing plane; 5123-retraction bevel; 513-sliding hole; 5131-limiting concave ring; 52-sewing nail. Push block; 521-Nail receiving groove; 5211-Elastic plate; 52111-Arc groove; 5212-Gap; 5213-Connecting piece; 5214-Clamping block; 522-Gate; 523-Concave; 6-Nail push block reset mechanism; 61-Elastic component; 62-Guide rod; 621-Spring limiting component; 622-Limiting protrusion ring; 63-Elastic pull component; 7-Nail; 71-Nail body; 72-Nail leg; 8-Nail abutment; 81-Forming cavity; 9-Operating part; 91-Operating handle; 92-Blade body. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0014] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0015] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0018] As attached Figure 1 - Appendix Figure 26 As shown, the present invention provides a pusher block assembly, including a pusher block 5 and a pusher block reset mechanism 6. The pusher block reset mechanism 6 is used to drive the pusher block 5 to reset toward the pusher slot after the pusher block 5 pushes the suture nail 7 to complete the sewing action.

[0019] Reference Appendix Figure 2 and attached Figure 3 In conventional staplers, the pusher block 5, which extends into the clamping cavity 4, pushes the pusher block 5 out of the staple cartridge 15 along the pusher groove after the pusher slider 2 pushes it out. This pushes the staples 7 to complete the suturing action. After this action is completed, the pusher block 5 remains in the clamping cavity 4. This presents two problems. First, if medical personnel intentionally or unintentionally move the staple cartridge during suturing or cutting, or if the patient's body trembles and causes relative displacement between the staple cartridge and the tissue, the end of the pusher block 5 protruding into the clamping cavity 4 will come into contact with the tissue. This can cause minor scratches or, in severe cases, tearing of the tissue when the stapler head is removed. Second, the pusher blocks 5 are closely spaced within the staple cartridge, for example, as shown in the attached image. Figure 11 When the structure of the three rows of pusher blocks 5 shown is tight, the parts of the two adjacent pusher blocks 5 protruding into the clamping cavity 4 (suture pusher blocks 52) will clamp the tissue in a clamping structure, causing it to adhere to the tissue. On the one hand, this will squeeze the tissue, and on the other hand, it will affect the separation of the stapler head from the tissue.

[0020] In addressing the aforementioned problems, the applicant attempted three methods: First, preventing the staple pusher 52 of the staple pusher block 5 from protruding beyond the staple surface 15, thus resolving the two problems mentioned above. Second, increasing the spacing between the staple pusher blocks 5 to address the issue of tissue clamping. Third, chamfering the upstream and downstream edges of the staple pusher blocks 5 to address the issue of tissue scratching. However, the first method severely affected the suturing effect of the staples 7, preventing them from forming a tight seal. The second method resulted in insufficiently dense arrangement of the staples 7, also affecting the suturing effect. The third method failed to eliminate the problem of tissue clamping and also affected the structural strength of the staple pusher blocks 5. The pusher block assembly provided by this invention, through the setting of a pusher block reset mechanism 6, after the pusher block 5 pushes the staple 7 to complete the suturing action, drives the pusher block 5 to reset towards the pusher slot, so that the protruding part of the pusher block 5 (staple pusher 52) retracts into the staple exit surface 15. On the one hand, since the staple 7 will compress the sutured tissue before the pusher block 5 resets, the tissue will be a certain distance away from the end of the staple pusher 52, and there will be no situation where two adjacent staple pushers 52 clamp the tissue. After the staple 7 completes the suturing of the tissue, the pusher block 5 immediately resets, and the pusher block 5 leaves the clamping cavity 4 before the tissue elastically resets, completely eliminating the problem of two adjacent staple pushers 52 clamping the tissue. On the other hand, it also greatly reduces the possibility that the end of the pusher block 5 protruding in the clamping cavity 4 will come into contact with the tissue due to the intentional or unintentional movement of the staple cartridge by medical personnel during suturing and cutting, or the relative displacement between the staple cartridge and the tissue caused by the patient's body tremors. In other words, by setting up the pusher block reset mechanism 6, the above two problems are completely eliminated. Compared with other solutions, it will not affect the sewing effect and tightness of the stitching 7 at all, and it can also ensure the structural strength of the pusher block 5.

[0021] In one embodiment, the pusher block 5 includes a trigger block 51 and a sew-pin pusher block 52. The trigger block 51 has a limiting surface 511 on one side near the bottom surface 131 of the trigger groove 13, and a trigger surface 512 on the other side. The sew-pin pusher block 52 is disposed on the sidewall of the trigger block 51 or on the limiting surface 511. (Refer to the attached drawing.) Figure 11 - Appendix Figure 14 The pusher block 52 of this pusher block 5 is set on the limiting surface 511 of the trigger block 51, as shown in the attached figure. Figure 27 The pusher block 52 of this pusher block 5 is located on the side of the trigger block 51; the pusher block reset mechanism 6 provided by the present invention can have various structural forms, see attached figure. Figure 26 For example, an elastic pull member 63 can be provided between the trigger surface 512 of the pusher block 5 and the mounting surface 14 of the nail box 1 or the cover plate 3. The elastic pull member 63 can be, for example, a tension spring or an elastic rope. In this case, the elastic pull member 63 is positioned within the nail groove 12 of the trigger surface 512 to avoid interference between the elastic pull member 63 and the pusher block slider 2. This type of pusher block reset mechanism 6 requires a relatively long elastic pull member 63, and both ends of the elastic pull member 63 need to be fixed to the pusher block 5, the mounting surface 14, or the cover plate 3, respectively, making installation relatively difficult.

[0022] In one preferred embodiment, refer to the appendix Figure 11 - Appendix Figure 14 Appendix Figure 27 The pusher block reset mechanism 6 includes an elastic element 61 disposed on the limiting surface 511. The other end of the elastic element 61 is aligned with the bottom surface 131 of the trigger groove 13. In this embodiment, the elastic element 61 can be a compression spring, a sheet spring, or other elastic body with elastic reset capability. Preferably, refer to the attached figure. Figure 11 The elastic element 61 is a spring sheet, with one end of the spring sheet attached to the limiting surface 511 and the other end bent and suspended freely. Alternatively, the elastic element 61 can be a compression spring, with one end fixed to the limiting surface 511 and the other end suspended freely. In this case, when the pusher block 2 pushes the pusher block 5 to push the nail, the pusher block 5 is limited by the pusher groove and can only slide linearly along the pusher groove towards the nail exit surface 15 until one end of the pusher block 52 extends out of the nail exit surface 15. (Refer to the attached document.) Figure 3At this time, the limiting surface 511 of the trigger block 51 will move closer to the bottom surface 131 of the trigger groove 13. At this time, the free end of the elastic element 61 will contact the bottom surface 131 of the trigger groove 13. During the continued movement of the trigger block 51, the trigger block 51 compresses the elastic element 61 until the pusher block 5 pushes the sew nail 7 to complete the sewing. After the pusher block 2 completes the push of the pusher block 5, the pusher block 2 leaves the pusher block 5 and continues to move forward. At this time, the pressure on the pusher block 5 disappears, the elastic element 61 elastically resets, and then drives the trigger block 51 to move along the pusher groove towards the mounting surface 14 until the elastic element 61 is fully stretched. After the pusher block 5 pushes the sew nail 7 to complete the sewing action, the pusher block 5 is driven to reset towards the pusher groove.

[0023] The pusher block reset mechanism 6 provided in this embodiment only requires fixing an elastic element 61 on the limiting surface 511 of the conventional pusher block 5. The overall structure of the pusher block reset mechanism 6 is extremely simple, and it is also easy to manufacture and install. This means that other components of the stapler do not need to be modified at all, and it is easy to directly install this pusher block assembly into the existing stapler design.

[0024] In one embodiment, a sliding hole 513 is provided on the limiting surface 511. The sliding hole 513 can be a blind hole or a through hole penetrating the trigger surface 512; see attached figure. Figure 12 - Appendix Figure 13 The pusher block reset mechanism 6 also includes a guide rod 62 slidably disposed on the sliding hole 513. One end of the guide rod 62 extends out of the sliding hole 513 from the limiting surface 511, and a spring limiting member 621 is provided at the end of the guide rod 62 extending out of the sliding hole. Preferably, the spring limiting member 621 is a limiting rod or a limiting ring disposed at the end of the guide rod 62. The elastic member 61 is a spring sleeved on the protruding part of the guide rod 62. One end of the spring abuts against the spring limiting member 621, and the other end abuts against the limiting surface 511. The guide rod 62 and the sliding hole 513 are also provided with a limiting structure to restrict the guide rod 62 from sliding out of the sliding hole 513 near the limiting surface 511, thereby preventing the guide rod 62 from disengaging from the sliding hole 513. In this embodiment, the elastic element 61 is a spring, and it is equipped with a guide rod 62 that can slide within the sliding hole 513. This ensures the guidance of the spring during compression and extension, preventing the elastic element 61 from shifting during compression, which could cause it to jam and fail to reset, or enter the staple groove 12 and interfere with the use of the staple 7. This effectively eliminates medical accidents caused by the shifting of the elastic element 61 and improves the reliability of the staple pusher assembly. At the same time, the guide rod 62 can slide within the sliding hole 513, thereby providing the spring with compression stroke, allowing the spring to store force.

[0025] In one embodiment, reference is made to the appendix. Figure 15 and attached Figure 16The limiting structure includes a limiting protruding ring 622 disposed on the guide rod 62 and located at the sliding hole 513, and a limiting concave ring 5131 disposed in the sliding hole 513; the outer wall of the guide rod 62 is slidably engaged with the inner wall of the limiting concave ring 5131, and the outer wall of the limiting protruding ring 622 is slidably engaged with the inner wall of the sliding hole 513. In this embodiment, the sliding hole 513 has a stepped hole structure, and the guide rod 62 has a stepped shaft structure. The two cooperate with each other to ensure that they will not separate while ensuring smooth sliding.

[0026] In one embodiment, reference is made to the appendix. Figure 16 A limiting concave ring 5131 is disposed at one end of the sliding hole 513 near the limiting surface 511, and a limiting convex ring 622 is disposed at one end of the guide rod 62 away from the spring limiting member 621. This arrangement increases the distance between the end face of the guide rod 62 away from the spring limiting member 621 and the end of the sliding hole 513 away from the limiting surface 511, thereby increasing the travel of the guide rod 62 and the pusher block 5, allowing the pusher block 5 to extend as far as possible from the exiting surface 15. In one embodiment, the sliding hole 513 is a through hole connecting the limiting surface 511 and the triggering surface 512. In this case, during the compression of the spring, the end of the guide rod 62 away from the spring limiting member 621 can extend from the end of the sliding hole 513 located at the triggering surface 512, further increasing the travel of the guide rod 62 and the pusher block 5, allowing the pusher block 5 to extend as far as possible from the exiting surface 15.

[0027] In one embodiment, the trigger surface 512 includes an infeeding inclined surface 5121 and a suture plane 5122 arranged sequentially along the sliding direction of the pusher slider 2. Preferably, the trigger surface 512 includes an infeeding inclined surface 5121, a suture plane 5122, and a retraction inclined surface 5123 arranged sequentially along the sliding direction of the pusher slider 2. The pusher slider 2 first contacts the infeeding inclined surface 5121, and the pusher trigger surface 512 gradually moves, indicating that suturing is in progress. When it contacts the suture plane 5122, the pusher block 5 is at its deepest limit position, indicating that the suturing is complete. The pusher slider 2... When sliding on the suture plane 5122, it maintains the sutured state for a certain period of time, thereby improving the suture effect. Finally, it leaves the trigger surface 512 through the retraction slope 5123, so that the pusher block 5 gradually resets and then contacts the restraint on the pusher block 5, so that the elastic element 61 drives the pusher block 5 to quickly reset. In the embodiment, the through hole is set on the inlet slope 5121, that is, the spring is set downstream of the pusher block 5, which can avoid the guide rod 62 extending from the end of the sliding hole 513 located on the trigger surface 512 from interfering with the movement of the pusher slider 2 when the sutured state and the retraction state are completed.

[0028] In another embodiment, refer to the appendix Figure 22 - Appendix Figure 24The pusher block reset mechanism 6 also includes a guide rod 62 fixedly mounted on the limiting surface 511. A spring limiting member 621 is provided at the other end of the guide rod 62. In this embodiment, the guide rod 62 is fixedly mounted on the limiting surface 511, simplifying the structure of the pusher block reset mechanism 6. The elastic member 61 is a spring sleeved on the guide rod 62. One end of the spring abuts against the spring limiting member 621, and the other end abuts against the limiting surface 511. In this embodiment, the spring limiting member 621 is a limiting rod provided at the end of the guide rod 62. The bottom surface 131 of the trigger groove 13 is provided with a through hole 1311 through which the guide rod 62 and the spring limiting member 621 can pass. In this embodiment, during the downward movement of the pusher block 5, the ends of the guide rod 62 and the spring limiting member 621 will pass through the through hole 1311 and enter the clamping cavity 4, while the end of the spring will abut against the bottom surface 131 of the trigger groove 13 to compress and store force. After the pusher block 2 leaves the pusher block 5, the spring resets and drives the pusher block 5, the guide rod 62 and the spring limiting member 621 to reset.

[0029] In one embodiment, the end face of the pusher block 52 of the pusher block 5 is provided with a nail receiving groove 521 for accommodating the nail body 71 of the nail 7; the groove opening 522 of the nail receiving groove 521 is provided with a clamping structure for clamping the nail body 71 of the nail 7. In this embodiment, when the staple 7 is loaded into the staple receiving slot 521, the staple 7 is clamped and constrained by the clamping structure. This provides good protection against detachment during transportation and effectively prevents the staple 7 from falling off. If the pusher block 5 is accidentally fired due to improper operation, the staple 7 is also constrained by the clamping structure and is not easily detached from the pusher block 5. In clinical use, when the staple 7 contacts the tissue and is sutured, and the pusher block 5 resets, the reset of the pusher block 5 will pull the staple 7. However, since the staple 7 is sutured to the tissue, it cannot be pulled, causing the staple 7 to detach from the clamping structure. The pusher block 5 resets independently. When the staple 7 does not contact the tissue and becomes a stump, it cannot detach from the clamping structure because it has no external connection or external force. The residual staples will remain on the staple pusher block 5 to avoid the risk of staples remaining in the body. At this time, the staple pusher block 5 will drive the residual staples after the suturing action back into the staple groove 12. At this time, the reset stroke of the staple pusher block reset mechanism 6 will make the end of the staple pusher block 52 of the staple pusher block 5 at least one sutured staple 7 height away from the staple exit surface 15. That is, the staple pusher block reset mechanism 6 will drive the staple pusher block 5 and the residual staples after the suturing action back into the staple groove 12, so that both are completely separated from the clamping cavity 4, avoiding the staple pusher block 5 and the residual staples from being stuck in the clamping cavity 4. On the one hand, it can avoid the staple pusher block 5 and the residual staples from scratching the tissue, and on the other hand, it can also avoid the residual staples from falling off due to contact with the tissue during the withdrawal of the staple head from the body, thus avoiding the occurrence of residual staples remaining in the body. In this embodiment, the combination of the staple pusher block reset mechanism 6 and the clamp structure can avoid the occurrence of residual staples remaining in the body without affecting the normal suturing of the staples 7.

[0030] The present invention also provides a staple cartridge, comprising a staple cartridge 1, a staple pusher slider 2, a cover plate 3, a plurality of staples 7, and a plurality of the aforementioned staple pusher block assemblies; the staple cartridge 1 is provided with a pusher groove 11, and at least one side of the staple cartridge 1 located in the pusher groove 11 is provided with a staple pusher groove, the staple pusher groove including a plurality of staple slots 12 penetrating both ends of the staple cartridge 1 and a trigger slot 13 connecting a row of staple slots 12, that is, the staple slots 12 and the trigger slots 13 are interconnected, and a staple pusher block 5 is slidably disposed in each staple slot 12. Specifically, the trigger block 51 of the staple pusher block 5 is disposed in the trigger slot 13, or disposed in the trigger slot 13 and the staple slot 12, while the staple pusher block 52 of the staple pusher block 5 is disposed in the staple slot 12, and the end face of the staple pusher block 52 of the staple pusher block 5 abuts against the staple 7. One side of the staple cartridge 1 is a mounting surface 14, and the other side is a staple dispensing surface 15, and the cover plate 3 is disposed on the mounting surface 14 to restrict the staple pusher block 5 and the staple pusher slider 2. The pusher block 2 includes a sliding part 21 and a trigger part 22, wherein the trigger part 22 slides within the trigger groove 13 to push the pusher block 5 to move along the pusher groove. The sewing nail 7 includes a nail body 71 and nail legs 72 disposed at both ends of the nail body 71.

[0031] The present invention also provides a stapler, including an operating part 9 and a head. The head includes an anvil seat 8 and the aforementioned staple cartridge, and the anvil seat 8 is provided with a plurality of forming cavities 81 corresponding one-to-one with the staples 7. The anvil seat 8 and the staple cartridge are connected to the operating part 9 at one end near the operating part 9. The operating part 9 includes an operating handle 91 and a blade body 92 that is telescopically disposed on the operating handle 91.

[0032] The present invention also provides a method of anastomosis, using the above-mentioned stapler, comprising the following steps: S1, aligning the head with the tissue to be cut and sutured; S2, the operating handle 91 controls the staple cartridge and the anvil 8 to come together and clamp the tissue to be cut and sutured. When the staple cartridge and the anvil 8 come together, a clamping cavity 4 for accommodating the tissue is formed on the opposite side of the staple cartridge and the anvil 8. S3, the operating handle 91 controls the movement of the blade body 92. During the movement, the blade body 92 pushes the pusher slider 2 to move. The pusher slider 2 pushes the pusher block 5 to move along the pusher groove, pushing the staples 7 to suture the part of the tissue to be cut. Then the blade body 92 cuts the sutured tissue position. After the pusher slider 2 leaves the corresponding pusher block 5, the pusher block reset mechanism 6 drives the pusher block 5 to reset towards the staple groove 12. In the embodiment where the end face of the staple pusher block 52 is provided with a clamping structure, when the staple 7 is not sutured, the pusher block reset mechanism 6 drives the pusher block 5 and the residual staple clamped by the clamping structure to reset towards the staple groove 12 and leave the clamping cavity 4.

[0033] Reference Appendix Figure 18 - Appendix Figure 20The present invention also provides a pusher block, including a pusher block 52. One end of the pusher block 52 is provided with two elastically deformable plates 5211. A locking block 5214 protrudes inward from the end face of each elastic plate 5211. The two locking blocks 5214 are bent towards the middle of the two elastic plates 5211, forming a clamping structure. The inner sides of the two locking blocks 5214 and the end faces of the two elastic plates 5211 enclose a nail-receiving groove 521 for accommodating the nail body 71 of the pusher 7. The ends of the two locking blocks 5214 are spaced apart to form openings 522 in the nail-receiving groove 521. The nail body 71 of the pusher 7 is installed into the nail-receiving groove 521 through the openings 522 and simultaneously disengages from the nail-receiving groove 521 through the openings 522. Figure 8 and attached Figure 19 When the staple pusher 52 is housed in the staple slot 12 of the staple cartridge, the two elastic plates 5211 elastically abut against the inner wall of the staple pusher slot (staple slot 12), and the opening force of the two elastic plates 5211 engages the staple pusher 52 within the staple slot 12. Without external force, the staple pusher 52 will not slide within the staple slot 12. Simultaneously, due to the restriction of the inner wall of the staple slot 12, the two elastic plates 5211 move closer together, causing the slot opening 522 to be relatively close together. The staple body 71 is locked within the staple slot 521 and cannot detach, thus achieving the effect of not performing staple stitching. Before surgery, when the suture pusher 52 is in the suture slot 12, the suture 7 is tightly connected to the suture pusher 52. Furthermore, because the suture pusher 52 and the suture slot 12 are tightly fitted at this time, the suture slot 12, the suture pusher 52, and the suture 7 will not move relative to each other. During the transport of the suture cartridge, and during the installation and opening of the suture cartridge limit cover by medical personnel, the suture slot 12, the suture pusher 52, and the suture 7 will not move relative to each other, avoiding the possibility of the suture 7 falling out prematurely due to improper transportation or operation before surgery, which could cause surgical accidents. (See attached appendix.) Figure 20 When the end of the staple pusher 52 leaves the staple slot 12 from the staple outlet surface 15 of the staple cartridge, that is, when the staple pusher slider 2 pushes the staple pusher 5 and the staple 7 to suture, the two elastic plates 5211 lose the restraint of the inner wall of the staple slot 12 and open, and the slot opening 522 is in a relatively open state. The staple body 71 can be disengaged from the slot opening 522. Thus, it is in the suture state at this time. For the staple 7 sutured to the tissue, the staple body 71 of the staple 7 needs to be disengaged from the staple pusher 52. By the end of the staple pusher 52 leaving the staple slot 12 from the staple outlet surface 15 of the staple cartridge, the slot opening 522 of the staple receiving slot 521 automatically opens after the staple pusher slider 2 pushes the staple into place, and the staple body 71 is disengaged from the staple pusher 52.

[0034] The pusher block 5 provided by the present invention forms a suture groove 521 for accommodating the suture 7 by using two mutually opening elastic plates 5211 and a locking block 5214 at the end of the suture pusher block 52. At this time, the groove opening 522 of the suture groove 521 can adaptively open or close depending on whether the suture pusher block 52 is inside or outside the suture groove 12. On the one hand, when the suture pusher block 52 is inside the suture groove 12, the suture groove 12, the suture pusher block 52 and the suture 7 will not move relative to each other. During the transportation of the suture cartridge, and during the installation of the suture cartridge and the opening of the suture cartridge sealing cover by medical personnel, the suture groove 12, the suture pusher block 52 and the suture 7 will not move, avoiding the possibility that the suture 7 may fall off prematurely before surgery due to improper transportation or operation, causing surgical accidents. On the other hand, after the suture pusher block 52 leaves the suture groove 12, the suture body 71 can be separated from the suture pusher block 52. The staple pusher 52 provided by this invention requires no driving mechanism, and the locking structure is achieved through the elastic deformation capability of the elastic plate 5211, thus avoiding jamming and effectively ensuring the working stability of the staple pusher 5. Furthermore, this invention is also applicable to a stapler where the staple pusher 5 is only triggered by the staple pusher slider 2 in areas containing tissue (Chinese patent application: CN118453018A, a staple cartridge, stapler, and stapler method). In this staple cartridge, the staple pusher 5 moves along the staple groove 12 for suturing. When there is no tissue at the corresponding position in the clamping cavity 4, the staple pusher 5 at that position will not be triggered, thus remaining stably and consistently within the staple groove 12, preventing the staples 7 from falling from the bottom of the staple groove 12 and through the staple exit surface 15 into the patient's body.

[0035] In one embodiment, reference is made to the appendix. Figure 20When the slot 522 is in a relatively open state, the diameter of the nail body 71 is larger than the opening width of the slot 522. That is, the opening width of the slot 522 in the relatively open state is wider than the opening width when the slot 522 is in a relatively closed state. However, the opening width of the slot 522 in the relatively open state is still smaller than the diameter of the nail body 71. At this time, when the slot 522 is in the relatively closed state, the two locking blocks 5214 form a clamping structure to clamp the nail body 71. However, the clamping strength is strong, and the nail body 71 cannot leave the nail receiving slot 521 at all. When the slot 522 is in a relatively open state, the opening of the slot 522 is slightly smaller than the diameter of the nail body 71. At this time, the two locking blocks 5214 still form a clamping structure to clamp the nail body 71, but the clamping strength is relatively weak. In clinical use... When the staple 7 contacts the tissue and is sutured, the suture force between the staple 7 and the tissue can cause the staple 7 to detach from the staple receiving groove 521 clamp structure, completing the separation of the staple 7 from the pusher block 5 after suturing. When the staple 7 does not contact the tissue and becomes a residual staple, it cannot detach from the staple receiving groove 521 and clamp structure because it has no external connection or external force. That is, the residual staple will remain on the pusher block 5, avoiding the risk of residual staple remaining in the human body. At this time, even if the medical staff makes slight movement to the head of the stapler or the patient's body trembles, the staple body 71 still cannot detach from the staple receiving groove 521. When the medical staff operates the head to detach from the patient's body, the pusher block 5 will push the residual staple after the suturing action against the human body, avoiding the situation of residual staple remaining in the human body.

[0036] In one embodiment, a gap 5212 is provided between the two elastic plates 5211, and the gap 5212 communicates with the bottom of the tack groove 521. In this embodiment, the two elastic plates 5211 are integrally formed with the body of the tack pusher block 52. By subsequently cutting the gap 5212 to separate the end of the tack pusher block 52 into two elastic plates 5211, the manufacturing difficulty of the tack pusher block 52 is simplified, while ensuring its elastic restoring capability.

[0037] In one embodiment, connecting pieces 5213 are provided on the bottom of the tack groove 521, connecting both sides of the gap 5212. Preferably, the connecting pieces 5213 are integrally formed with the main body of the tack pusher 52. This is achieved by retaining the connecting pieces 5213 during the processing of the gap 5212, thereby simplifying the processing difficulty. In other embodiments, the connecting pieces 5213 can also be flexible pieces that are processed later. When the groove openings 522 are in a relatively close state, the connecting pieces 5213 are squeezed and accommodated in the gap 5212 or The nail 71 is contained within the nail groove 521, while the groove opening 522 is in a relatively open state. The connecting piece 5213 carries the nail body 71, preventing the nail body 71 from embedding into the gap 5212 during the nailing process. The connecting piece 5213 also limits the maximum opening angle of the groove opening 522, thus preventing the two elastic plates 5211 from opening too wide and losing their abutment effect on the nail body 71. In the embodiment with the nail pusher block reset mechanism 6, the two elastic plates 5211 are prevented from opening too wide and failing to reset back into the nail groove 12.

[0038] In one embodiment, an arc-shaped groove 52111 is provided on the inner side of the end face of the elastic plate 5211, and two opposing arc-shaped grooves 52111 form a semi-circular groove. Preferably, the inner wall of the locking block 5214 is a concave arc surface tangent to the arc-shaped groove 52111, and the semi-circular groove and the two concave arc surfaces form an arc groove with an opening, thereby providing good wrapping of the nail body 71.

[0039] In one embodiment, reference is made to the appendix. Figure 12 The pin pusher block 52 has a recess 523 in the middle, which divides the elastic plate 5211 into two elastic arms. The pin body 71 of one pin 7 is connected to the two elastic arms. This arrangement can reduce the contact area between the pin 7 and the pin receiving groove 521, simplify the separation difficulty while ensuring the support strength, and also reduce the amount of material.

[0040] In one embodiment, the pusher block 5 further includes a pusher block reset mechanism 6. The pusher block reset mechanism 6 is used to drive the suture pusher block 52 to reset towards the pusher slot after the pusher block 5 pushes the suture staple 7 to complete the suturing action. The structure of the pusher block reset mechanism 6 can be the same as the pusher block reset mechanism 6 described above. When the pusher block 5 is combined with the pusher block reset mechanism 6 described above, the elastic reset force of the elastic element 61 in the pusher block reset mechanism 6 is slightly greater than the elastic force of the elastic plate 5211. That is, the elastic plate 5211 can drive the two elastic plates 5211, which are in a relatively open state, to move closer to each other and reset into the staple slot 12. For the residual staple without sutured tissue, the elastic element 61 drives the elastic plate 5211 and drives the residual staple back into the staple slot 12. Moreover, the two locking blocks 5214 still form a clamp structure to clamp the staple body 71 of the residual staple, and the clamping strength is strong. This can prevent the residual staple from falling into the patient's body from the staple slot 521 during the process of the staple head leaving the patient's body, which greatly improves reliability.

[0041] In one embodiment, the pusher block 5 further includes a trigger block 51 connected to the stitch pusher block 52, and the stitch pusher block 52 is disposed on the side or limiting surface 511 of the trigger block 51.

[0042] The present invention also provides a staple cartridge, including a staple box 1, a staple pusher slider 2, a cover plate 3, a plurality of staples 7, and the aforementioned staple pusher block 5; the staple box 1 is provided with a pusher groove 11, and at least one side of the staple box 1 located in the pusher groove 11 is provided with a staple pusher groove, the staple pusher groove including a plurality of staple slots 12 penetrating both ends of the staple box 1 and a trigger slot 13 connecting a row of staple slots 12, that is, the staple slots 12 and the trigger slots 13 are interconnected, and a staple pusher block 5 is slidably disposed in each staple slot 12. Specifically, the trigger block 51 of the staple pusher block 5 is disposed in the trigger slot 13, or disposed in the trigger slot 13 and the staple slot 12, while the staple pusher block 52 of the staple pusher block 5 is disposed in the staple slot 12, and the staple body 71 of the staple 7 is embedded in the staple receiving slot 521 of the staple pusher block 5. Among them, one side of the staple box 1 is a mounting surface 14, and the other side is a staple discharging surface 15, and the cover plate 3 is disposed on the mounting surface 14 to restrict the staple pusher block 5 and the staple pusher slider 2. The pusher block 2 includes a sliding part 21 and a trigger part 22, wherein the trigger part 22 slides within the trigger groove 13 to push the pusher block 5 to move along the pusher groove. The sewing nail 7 includes a nail body 71 and nail legs 72 disposed at both ends of the nail body 71.

[0043] The present invention also provides a stapler, including an operating part 9 and a head. The head includes an anvil seat 8 and the aforementioned staple cartridge, and the anvil seat 8 is provided with a plurality of forming cavities 81 corresponding one-to-one with the staples 7. The anvil seat 8 and the staple cartridge are connected to the operating part 9 at one end near the operating part 9. The operating part 9 includes an operating handle 91 and a blade body 92 that is telescopically disposed on the operating handle 91.

[0044] The present invention also provides an anastomosis method using the above-mentioned stapler, comprising the following steps: S1, aligning the head with the tissue to be cut and sutured; S2, operating the handle 91 to control the staple cartridge and the anvil 8 to come together and clamp the tissue to be cut and sutured, wherein when the staple cartridge and the anvil 8 come together, a clamping cavity 4 for accommodating the tissue is formed on the opposite side of the staple cartridge and the anvil 8; S3, operating the handle 91 to control the movement of the blade body 92, wherein the blade body 92 pushes the pusher slider 2 to move during the movement, and the pusher slider 2 pushes the pusher block 5 to move along the pusher groove, thereby pushing the staples 7 to cut the tissue portion. The suture is performed, and then the blade 92 cuts the sutured tissue. Before the staple pusher 52 leaves the staple groove 12 from the staple outlet surface 15, the two elastic plates 5211 of the pusher 5 elastically abut against the inner wall of the staple groove 12, the groove opening 522 is relatively close, and the staple body 71 is locked in the staple receiving groove 521. When the staple pusher 52 leaves the staple groove 12 from the staple outlet surface 15, the staple leg 72 of the staple 7 bends to perform the suturing action, and the two elastic plates 5211 are released from restraint and open, the groove opening 522 is relatively open, and the staple body 71 can be disengaged from the groove opening 522.

[0045] The above description is merely an embodiment and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solutions of the present invention without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A pusher block, comprising a nail pusher block (52), characterized in that, One end of the sew nail pusher (52) is provided with two elastic plates (5211) that can be elastically deformed. The end face of the elastic plate (5211) is provided with a locking block (5214) that protrudes inward. The inner side of the two locking blocks (5214) and the end face of the two elastic plates (5211) surround to form a nail receiving groove (521) for accommodating the nail body (71) of the sew nail (7). The ends of the two locking blocks (5214) are spaced apart to form the slot (522) of the nail receiving groove (521). When the sew-pin pusher (52) is placed in the nail slot (12) of the nail cartridge, the two elastic plates (5211) elastically abut against the inner wall of the pusher slot, the slot opening (522) is in a relatively close state, and the nail body (71) is locked in the nail receiving slot (521). When the end of the sew nail pusher (52) leaves the nail slot (12) from the nail outlet surface (15) of the nail chamber, the two elastic plates (5211) are unrestrained and open, the slot (522) is in a relatively open state, and the nail body (71) can be disengaged from the slot (522).

2. The pusher block as described in claim 1, characterized in that, When the slot (522) is in a relatively open state, the diameter of the nail body (71) is larger than the opening width of the slot (522).

3. The pusher block as described in claim 1, characterized in that, There is a gap (5212) between the two elastic plates (5211), and the gap (5212) communicates with the bottom of the nail-receiving groove (521).

4. The pusher block as described in claim 3, characterized in that, The bottom of the nail-receiving groove (521) is provided with a connecting piece (5213) that connects the two sides of the gap (5212). With the slot (522) in a relatively open state, the connecting piece (5213) carries the nail body (71), and the connecting piece (5213) limits the maximum opening angle of the slot (522).

5. The pusher block as described in claim 1, characterized in that, An arc-shaped groove (52111) is provided on the inner side of the end face of the elastic plate (52111), and two opposite arc-shaped grooves (52111) form a semi-circular groove.

6. The pusher block as described in claim 1, characterized in that, The pin pusher block (52) has a recess (523) in the middle, which divides the elastic plate (5211) into two elastic arms. The pin body (71) of one pin (7) is connected to the two elastic arms.

7. The pusher block as described in any one of claims 1-6, characterized in that, It also includes a pusher block reset mechanism (6), which is used to drive the sew nail pusher block (52) to reset toward the pusher nail groove after the pusher block (5) pushes the sew nail (7) to complete the sewing action.

8. A stapled cartridge, characterized in that, It includes a nail box (1), a nail pusher slider (2), a cover plate (3), a number of nails (7), and a number of nail pusher blocks (5) as described in any one of claims 1-7; The nail box (1) is provided with a pusher groove (11). The nail box (1) is provided with a pusher groove on at least one side of the pusher groove (11). The pusher groove includes a plurality of nail grooves (12) that pass through both ends of the nail box (1) and a trigger groove (13) that connects a row of nail grooves (12). The pusher block (5) is slidably arranged in each nail groove (12). The nail body (71) of the sewing nail (7) is embedded in the nail receiving groove (521) of the pusher block (5).

9. A stapler, characterized in that, It includes an operating part (9) and a head, the head including an anvil (8) and a staple cartridge as described in claim 8; The anvil (8) and the staple cartridge are connected to the operating part (9) at one end near the operating part (9); The operating unit (9) includes an operating handle (91) and a blade body (92) that is telescopically mounted on the operating handle (91).

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