End execution assembly and surgical instrument

Abstract

The present invention provides an end execution assembly and a surgical instrument, the end execution assembly includes a nail magazine, a nail pushing slider, a cutting knife, a safety cover and a push rod unit, the nail magazine is provided with a knife groove, the nail pushing slider is slidably arranged in the knife groove, the safety cover is arranged on the nail magazine to cover the knife groove, the cutting knife includes a second blade pivotally connected to the nail pushing slider, the second blade includes an elastic part, the elastic part can abut against the nail pushing slider so that the second blade is clamped between the nail pushing slider and the safety cover, the push rod unit includes an abutting part, when the safety cover is separated from the second blade, the abutting part can abut against the second blade, so that the elastic part abuts against the nail pushing slider, and the second blade at least partially protrudes out of the upper surface of the nail magazine. The present invention solves the problem that the cutting knife of the stapler is easy to scratch the user.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to an end execution assembly and a surgical instrument. Background Art

[0002] In the field of minimally invasive surgery, staplers have become an indispensable tool in modern medical practice due to their precise and efficient operation. However, with the continuous advancement of technology, we are also facing new challenges, one of which is how to ensure the safety of surgical instruments, especially those with sharp edges, during use.

[0003] Although the sharp blade can provide precise cutting capabilities during surgery, there is a risk of accidental injury to the user when the instrument is not in use or in the preparation stage. This risk may not only affect the operating safety of medical staff, but may also interfere with the smooth progress of the operation. Traditional stapler designs often ignore this point, requiring medical staff to be extra careful during operation to avoid being cut by the blade.

[0004] In view of this, how to effectively prevent the sharp edge from causing accidental injuries to the user has become a major technical challenge in the current design of staplers.

[0005] The present invention is dedicated to solving this problem, and through an innovative design scheme, aims to improve the safety of the use of the stapler and provide medical personnel with a more reliable and safe surgical instrument. Summary of the invention

[0006] The object of the present invention is to provide an end execution assembly and a surgical instrument to solve the problem in the prior art that the cutting knife of the stapler is prone to accidentally scratching the user.

[0007] In order to achieve the above-mentioned purpose of the present invention, an embodiment of the present invention provides an end execution assembly, which includes a nail magazine, a nail pushing slider, a cutting knife, a safety cover and a push rod unit, the nail magazine is provided with a knife feeding groove, the nail pushing slider is slidably arranged in the knife feeding groove, the safety cover is arranged on the nail magazine to cover the knife feeding groove, the cutting knife includes a second blade pivotally connected to the nail pushing slider, the second blade includes an elastic part, when the safety cover is separated from the second blade, the elastic part can abut against the nail pushing slider so that the second blade is clamped between the nail pushing slider and the safety cover, the push rod unit includes an abutting part, when the safety cover is separated from the second blade, the abutting part can abut against the second blade, so that the elastic part abuts against the nail pushing slider and the second blade at least partially protrudes out of the upper surface of the nail magazine.

[0008] As a further improvement of an embodiment of the present invention, the cutting knife also includes a first blade and a mounting shaft arranged in a knife groove, the first blade is arranged on a nail pushing slider, the mounting shaft is arranged on the nail pushing slider along an axial direction perpendicular to the knife groove, the second blade is pivotally connected to the nail pushing slider via the mounting shaft and can pivot relative to the first blade, and when the second blade at least partially protrudes out of the upper surface of the nail magazine, the first blade and the second blade intersect at an acute angle.

[0009] As a further improvement of an embodiment of the present invention, when the elastic portion is in a state of being unstressed, the second blade can be pivoted toward the first blade to be accommodated in the blade groove.

[0010] As a further improvement of an embodiment of the present invention, the second blade includes a blade body, which is pivotally connected to the mounting shaft, and the blade body has a limiting side wall arranged toward the abutment portion and a cutting surface arranged away from the limiting side wall, and the elastic portion is arranged on the side of the limiting side wall on the blade body, and extends away from the limiting side wall in a direction away from the blade body.

[0011] As a further improvement of an embodiment of the present invention, the abutment portion includes an abutment wall, which can abut against the limiting side wall so that the push knife slider abuts against the elastic portion and the cutting surface at least partially protrudes out of the upper surface of the nail magazine.

[0012] As a further improvement of an embodiment of the present invention, the push rod unit includes a limiting groove arranged toward the second blade, the bottom wall of the limiting groove is arranged as the abutment wall, and the distance between the two side walls of the limiting groove is not less than the distance between one end of the blade body away from the elastic part to the end of the elastic part away from the blade body.

[0013] As a further improvement of an embodiment of the present invention, the push rod unit includes a push head and a push rod, the push head and the push rod are detachably connected, the push rod can drive the push head to move along the tool groove, and the limiting groove is arranged on the push head and at least partially protrudes beyond the upper surface of the nail magazine.

[0014] As a further improvement of an embodiment of the present invention, a snap-in groove is provided on the upper surface of the safety cover near the second blade, and the upper side of the second blade has a hanging ear arranged toward the snap-in groove, and the hanging ear can be snap-fitted with the snap-in groove.

[0015] As a further improvement of an embodiment of the present invention, it includes a nail anvil, a magazine base and a magazine unit located between the nail anvil and the magazine base, the magazine unit includes the nail magazine, the nail pushing slider, the cutting knife and the safety cover, one end of the nail anvil is pivotally connected to one end of the magazine base and the nail anvil can be pivoted relative to the magazine base to open or close, and the nail magazine is detachably arranged on the magazine base and is located between the nail anvil and the magazine base.

[0016] An embodiment of the present invention further provides a surgical instrument, which includes the end execution assembly as described above.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The safety cover is arranged on the nail magazine and the nail pushing slider is arranged at a predetermined position in the knife groove, so that the nail pushing slider can abut against the elastic part, and the second blade can be clamped between the nail pushing slider and the safety cover under the action of elastic force, thereby preventing the second blade from scratching the operator, and the first blade itself is arranged in the knife groove. Such an arrangement can effectively prevent the cutting knife from injuring the user;

[0019] 2) When the stapler needs to be used, the push rod unit pushes the second blade, and the abutting portion abuts against the second blade, so that the elastic portion abuts against the staple pushing slider, and the second blade at least partially protrudes out of the upper surface of the staple magazine, so that the tissue to be cut can be cut by the second blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of an end execution assembly provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0022] Figure 3 for Figure 2 Schematic diagram of the local structure in;

[0023] Figure 4 for Figure 2 A schematic diagram of the structure of the second blade;

[0024] Figure 5 for Figure 2 The structural diagram of the middle push rod unit;

[0025] Figure 6 This is a schematic diagram of the magazine unit when it is installed;

[0026] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of the middle compartment unit;

[0027] Figure 8 for Figure 7 The enlarged view of the M in the middle;

[0028] Fig. 9 It is a schematic diagram of the push rod unit pushing forward to drive the cutting knife;

[0029] Fig.10 for Fig. 9 The enlarged view of the N position in the middle;

[0030] Fig.11 for Fig. 9 A schematic diagram of the structure when the middle cutting knife cooperates with the nail pushing slider;

[0031] Fig.12 It is a schematic diagram of the push rod unit retreating;

[0032] Fig.13 A schematic structural diagram of a stapler provided in another embodiment of the present invention;

[0033] Fig.14 for Fig.13 Schematic diagram of the local explosion structure.

[0034] The above description of the drawings includes the following reference numerals:

[0035] 100. Warehouse unit;

[0036] 1. Nail warehouse;

[0037] 11. Tool groove;

[0038] 2. Push pin slider;

[0039] 21. Butt joint;

[0040] 3. Cutting knife;

[0041] 31. First blade;

[0042] 32. Second blade;

[0043] 321, elastic part;

[0044] 322. Ear hook;

[0045] 323, blade body;

[0046] 3231, top wall;

[0047] 3232, limited side wall;

[0048] 3233, cutting surface;

[0049] 3234, intersection;

[0050] 33. Install the shaft

[0051] 4. Insurance cover;

[0052] 41. Card slot;

[0053] 5. Push rod unit;

[0054] 51. Push the head;

[0055] 511, limiting groove;

[0056] 5111, abutting wall;

[0057] 5112, upper side wall;

[0058] 512, upper beam;

[0059] 5121, first boss;

[0060] 513, lower beam;

[0061] 5131, second boss;

[0062] 514, connecting beam;

[0063] 52. Putting;

[0064] 6. Anvil seat;

[0065] 7. Storage box base. DETAILED DESCRIPTION

[0066] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0067] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0068] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0069] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0070] like Figure 1-12As shown, the present invention provides an end execution assembly, which includes a nail magazine 1, a nail pushing slider 2, a cutting knife 3, a safety cover 4 and a push rod unit 5. The nail magazine 1 is provided with a knife groove 11, the nail pushing slider 2 is slidably arranged in the knife groove 11, and the safety cover 4 is arranged on the nail magazine 1 to cover the knife groove 11. The cutting knife 3 includes a second blade 32 pivotally connected to the nail pushing slider 2, and the second blade 32 includes an elastic portion 321. The elastic portion 321 can abut against the nail pushing slider 2 so that the second blade 32 is clamped between the nail pushing slider 2 and the safety cover 4. The push rod unit 5 includes an abutting portion. When the safety cover 4 is separated from the second blade 32, the abutting portion can abut against the second blade 32, so that the elastic portion abuts against the nail pushing slider 2, and the second blade 32 at least partially protrudes out of the upper surface of the nail magazine 1.

[0071] In the above setting, the safety cover 4 is set on the nail magazine 1, and the nail pushing slider 2 is set at a predetermined position in the tool feeding groove 11. The nail pushing slider 2 can abut against the elastic part 321 to apply pressure, so that the second blade 32 can be clamped between the nail pushing slider 2 and the safety cover 4 under the action of the elastic force, thereby preventing the second blade 32 from scratching the operator.

[0072] Further, please refer to Fig. 9 As best shown in FIG. 1 , when the push rod unit 5 is pushed forward, that is, the push rod unit 5 is driven to move forward, the abutting portion of the push rod unit 5 can abut against the second blade 32, so that the elastic portion 321 can abut against the nail pushing slider 2. In this way, the second blade 32 can at least partially protrude from the upper surface of the nail magazine 1 for cutting the tissue to be cut.

[0073] As a whole technical solution, it can be understood that during the use of the stapler, the second blade 32 can effectively cut the tissue to be cut. Before the stapler is used, the provision of the safety cover 4 can effectively prevent the second blade 32 from accidentally injuring people.

[0074] Preferably, reference Figure 2 and Figure 3 As shown, the pin-pushing slider 2 generally includes a slider body and an abutment head 21 disposed on the side of the slider body. The abutment head 21 protrudes out of the side of the slider body. The abutment head 21 can be used to abut against the elastic portion 321 .

[0075] With such a configuration, the abutment head 21 can accurately abut against the elastic portion 321 , thereby ensuring that when the cutting blade 3 interacts with the nail-pushing slider 2 , the cutting blade 3 can stably and effectively transmit force to the nail-pushing slider 2 through the elastic portion 321 .

[0076] It can be understood that when the cutting knife 3 is clamped between the abutment head 21 and the clamping groove 41 of the nail pushing slider, the abutment head 21 can play a role in increasing the stability of the clamping; when the push rod unit 5 pushes the nail pushing slider 2 through the cutting knife 3, the elastic part 321 will abut against the abutment head 21, thereby enabling the cutting knife 32 to smoothly extend out of the upper surface of the nail magazine 1.

[0077] In this embodiment, the cutting knife 3 also includes a first blade 31 and a mounting shaft 33 arranged in the tool groove 11, the first blade 31 is arranged on the nail pushing slider 2, the mounting shaft 33 is arranged on the nail pushing slider 2 along the axial direction perpendicular to the tool groove 11, the second blade 32 is pivotally connected to the nail pushing slider 2 through the mounting shaft 33, and the second blade 32 can pivot relative to the first blade 31.

[0078] It should be noted that the estimated slider 2 can be completely set in the tool groove 11, or it can be set to be located in the tool groove 11 and have a portion protruding from the upper surface of the tool groove 11. The present invention does not limit this, and the manufacturer can design it according to actual needs.

[0079] Specifically, the second blade 32 is sleeved on the installation shaft and can pivot relative to the installation shaft 33 , thereby achieving the purpose of pivoting relative to the first blade 31 .

[0080] The setting direction of the mounting shaft 33 is carefully designed so that the pivot surface of the second blade 32 is roughly parallel to the axial direction of the knife groove 11 , which is more conducive to cutting the tissue to be cut when the second blade 32 moves along the knife groove 11 .

[0081] In this embodiment, optionally, the first blade 31 is fixedly disposed on the nail-pushing slider 2 .

[0082] It should be noted that, in this embodiment, when the second blade 32 at least partially protrudes out of the upper surface of the nail magazine 1, for example Fig. 9 and Fig.11 As shown, the first blade 31 and the second blade 32 intersect at an acute angle, that is, the first blade and the second blade intersect to form a scissors structure. When the scissors structure is used to cut the tissue to be cut, it can limit the tissue to be cut, thereby improving the cutting effect.

[0083] Preferably, in this embodiment, when the elastic portion 321 is in a state of being unstressed, the second blade 32 can be pivoted toward the first blade 31 to be stored in the blade groove, thereby preventing the cutting knife 3 from causing harm to the user.

[0084] Optionally, when the elastic portion 321 is in a non-stressed state, the second blade 32 can pivot toward the first blade 31 and the two can be closed, thereby more effectively preventing the first blade 31 or the second blade 32 from cutting the user.

[0085] In the state where the elastic part 321 is not stressed, in order to allow the second blade 32 to pivot toward the first blade 31 and close the two, a return spring can be arranged between the two or between the estimated slider 2 and the second blade 32, so as to achieve the purpose of pivoting the second blade 32 and the first blade 31 to close.

[0086] Figure 4 The schematic diagram of the structure of the second blade 32 is shown. As shown in the figure, the structural design of the second blade 32 is very sophisticated, mainly including a blade body 323, and the blade body 323 is pivotally connected to the mounting shaft 33. The key part of the blade body 323 includes a limiting side wall 3232, which is arranged toward the abutment portion, and a cutting surface 3233 is also arranged opposite to the limiting side wall 3232. The elastic portion 321 is arranged on the side of the limiting side wall 3232 on the blade body, and extends away from the limiting side wall 3232 in a direction away from the blade body 323.

[0087] Furthermore, the abutting portion includes an abutting wall 5111 , which can abut against the limiting side wall 3232 , so that the nail-pushing slider 2 abuts against the elastic portion 321 , and the cutting surface 3233 at least partially protrudes from the upper surface of the nail magazine 1 .

[0088] Specifically, refer to Fig.10 As shown, Fig.10 for Fig. 9 From the enlarged view at point N, it can be understood that the abutment wall 5111 abuts against the limiting side wall 3232. On the one hand, it can make the limiting side wall 3232 fit better on the abutment wall 5111, and on the other hand, it can transmit the thrust to the elastic part 321, so that the elastic part 321 abuts against the pin push slider 2.

[0089] Typically, the cutting surface 3233 can be set as an arc-shaped cutting surface that protrudes away from the limiting side wall 3232, or directly set as a straight segment cutting surface. The cutting surface 3233 is set in a horizontally downward direction, so that when cutting the tissue to be cut, the tissue to be cut can be better limited. The present invention does not limit the shape of the cutting surface 3233, and it can be set according to actual needs in the specific design.

[0090] Further references Figure 4As shown, it can be understood that an angle is formed between the limiting side wall 3232 and the elastic part 321, as shown by angle a in the figure, and the angle a is usually an obtuse angle. Such a design enables the nail-pushing slider 2 to abut against the elastic part 321 to form a sufficiently large deformation when the abutting wall 5111 abuts against the limiting side wall 3232, thereby obtaining a sufficiently large elasticity.

[0091] Preferably, a certain deformation space is reserved between the elastic portion 321 and the blade body 323 , and the provision of this space is also to enable the elastic portion 321 to deform better when the nail-pushing slider 2 abuts against the elastic portion 321 .

[0092] Further, refer to Figure 2 and Figure 5 As shown, the push rod unit 5 includes a limiting groove 511 arranged toward the second blade, the bottom wall of the limiting groove 511 is set as the abutment wall 5111, and the distance between the two side walls of the limiting groove is not less than the distance between one end of the blade body away from the elastic part to the end of the elastic part away from the blade body.

[0093] Specifically, refer to Figure 5 As shown, the limiting groove 511 includes an upper side wall 5112 located above and a lower side wall arranged relative to the upper side wall 5112, and the distance between the two is greater than or equal to the distance between the end of the blade body away from the elastic part and the end of the elastic part away from the blade body. In this way, when the abutting wall 5111 is abutted and matched with the limiting side wall 3232, the upper and lower side walls of the limiting groove can limit the position of the second blade 32 in the vertical direction, which is more conducive to the push rod unit pushing the second blade 32 to move.

[0094] Furthermore, the second blade 32 further includes a top wall 3231. It is particularly noteworthy that the top wall 3231 and the limiting side wall 3232 form an intersection 3234 at the intersection, and this design detail enhances the structural integrity of the blade.

[0095] refer to Figure 4 As shown, the elastic portion 321 is arranged on the side of the limiting side wall 3232 on the blade body 323, and the elastic portion 321 extends in the up and down directions along the direction away from the intersection portion 3234, and extends in the horizontal direction away from the limiting side wall 3232 toward the cutting surface 3233, so that the obtuse angle a can be formed between the elastic portion 321 and the limiting side wall 3232.

[0096] In this embodiment, optionally, when the abutting wall 5111 is abutted against the limiting side wall 3232, the top wall 3231 may fit with the upper side wall 5112 of the limiting groove, so that the positions of the two in the vertical direction are better limited.

[0097] Preferably, the top wall 3231 and the limiting side wall 3232 can form a right angle structure to ensure the stability and cutting accuracy of the blade. Correspondingly, the abutting wall 5111 of the limiting groove and the upper side wall 5112 above are also in a vertical state. This design enables the limiting groove 511 to be closely matched with the blade body 323, further enhancing the limiting effect of the limiting groove 511 on the second blade 32.

[0098] Next, refer to Figure 5 , Figure 5 The push rod unit 5 is a schematic structural diagram. It can be understood that the push rod unit 5 is an important driving part in the end effector assembly, and includes two main components: a push rod 52 and a push head 51. The push rod 52 is driven to drive the push head 51 to move along the tool path 11.

[0099] The push rod 52 and the push head 51 are detachably connected, and the connection method may be a snap connection, an interference fit, etc. This design ensures that the push rod 52 and the push head 51 will not separate when the push rod 52 drives the push head 51 to move; and the two are also easy to assemble and maintain, so that push rods or push heads of different specifications can be replaced according to actual needs.

[0100] In this embodiment, the limiting groove 511 is arranged on the pushing head 51, and the limiting groove 511 at least partially protrudes beyond the upper surface of the nail magazine 1. The protruding part generally includes a side wall 5112 located above the limiting groove 511 and an upper part of the bottom wall (abutment wall 5111) of the limiting groove 511.

[0101] With such arrangement, when the abutting wall 5111 abuts against the limiting side wall 3232 , the cutting surface 3233 is at least partially located outside the upper surface of the stapling bin 1 .

[0102] In this embodiment, the push head 51 is generally configured as an I-beam structure, which includes an upper cross beam 512, a lower cross beam 513 and a connecting beam 514. The connecting beam 514 is connected to the same side of the upper cross beam 512 and the lower cross beam 513 so that the upper cross beam 512, the lower cross beam 513 and the connecting beam 514 surround the limiting groove 511, and a portion of the connecting beam 514 forms abutting wall 5111 of the limiting groove 511, and a portion of the upper cross beam 512 forms an upper side wall 5112 of the limiting groove 511.

[0103] The upper crossbeam 512 is usually provided with first bosses 5121 on both sides in the transverse direction, and the first bosses 5121 are limitedly connected to the anvil seat 6. The lower crossbeam 513 is usually provided with second bosses 5131 on both sides in the transverse direction, and the second bosses 5131 are limitedly connected to the knife groove 11. When the anvil seat 6 and the magazine base 7 are pivotally closed, the first bosses 5121 and the second bosses 5131 can both move along the axial direction of the knife groove 11. During this movement, the two first bosses 5121 cooperate with the two second bosses 5131 to limit the vertical positions of the anvil seat 6 and the magazine base 7, so that the end actuator can well clamp the tissue to be cut.

[0104] Further, in this embodiment, referring to Figure 2 and Figure 4 As shown, the safety cover 4 is designed to enhance safety, and a snap-in groove 41 is cleverly provided on its upper surface near the second blade 32. This snap-in groove 41 matches the hanging ear 322 provided on the upper side of the second blade 32, and can achieve a stable snap-in fit. When the second blade 32 is snapped between the push pin slider 2 and the safety cover 4 under the action of elastic force, the hanging ear 322 will be firmly snapped into the snap-in groove 41, thereby ensuring that the second blade 32 remains in a stable state when not in use, effectively preventing it from accidentally sliding out or moving. This snap-in design not only improves the safety of the entire end execution assembly, but also facilitates the storage and fixation of the blade.

[0105] Further, refer to Figure 1 As shown, the end effector assembly further includes an anvil 6, a magazine base 7 and a magazine unit 100, wherein the magazine unit 100 is disposed on the magazine base 7 and is located between the anvil 6 and the magazine base 7, and one end of the anvil 6 is pivotally connected to one end of the magazine base 7 and the two can be pivoted relative to each other to open or close. With such an arrangement, the end effector assembly can be opened or closed.

[0106] Further, refer to Figure 2 As shown, the magazine unit 100 includes the nail magazine 1, the nail pushing slider 2, the cutting knife 3 and the safety cover 4, and the nail magazine 1 is detachably arranged on the magazine base 7. In this way, the magazine unit 100 can be detachably installed on the magazine base 7 as a whole part, thereby realizing detachable installation.

[0107] Combination Figure 7 As shown, Figure 7 The schematic diagram of the structure of the magazine unit 100 is shown, in which the safety cover 4 of the magazine unit 100 is arranged on the nail magazine 1, the nail pushing slider 2 is arranged in the tool feeding groove 11, the second blade 32 is clamped between the nail pushing slider 2 and the safety cover 4, and the first blade 31 is located in the tool feeding groove 11.

[0108] It is understandable that the cutting blade 3 will not cause any harm to the operator during transportation and before assembly of the magazine unit 100. In particular, the second blade 32 will not cause any harm to the user.

[0109] Further, referring to FIG8, Figure 8 for Figure 7 The enlarged view of the middle M, through which it can be more clearly understood that the second blade 32 of the cutting knife is clamped between the nail pushing slider 2 and the safety cover 4.

[0110] Then return to Figure 6 As shown, Figure 6 The process of assembling the magazine unit 100 is shown, and after the nail magazine 1 is detachably mounted on the magazine base 7, the safety cover 4 is removed. It can be understood that after the safety cover 4 is removed, the elastic portion 321 is not subjected to external force, so the second blade 32 can pivot toward the first blade 31, so that the two are closed and both are located in the blade feeding groove 11.

[0111] Then, the pusher head 51 is driven to move toward the cutting blade 3 and abut against the cutting blade 3, so that the bottom wall of the limiting groove 511 abuts against the second blade 32, that is, the abutting wall 5111 abuts against the limiting side wall 3232, so that the cutting surface 3233 is at least partially located outside the upper surface of the nail magazine 1. In this way, during the assembly process of the magazine unit 100, the user will not be accidentally cut.

[0112] Then combine Figure 9-12 The use principle of the end effector assembly is further described. After the magazine unit is mounted on the magazine base 7 , the push rod unit 5 can be pushed forward to push the cutting knife 3 .

[0113] 9-10, during the pushing process of the push rod unit 5, the force is transmitted to the cutting knife 3, and the abutting wall 5111 of the push rod unit 5 abuts against the limiting side wall 3232 of the cutting knife, so that the estimated slider 2 abuts against the elastic part 321, and then the cutting surface 3233 of the cutting knife 3 at least partially protrudes out of the upper surface of the nail magazine 1 for cutting the tissue to be cut. This has been explained above and will not be repeated here.

[0114] Further, when the push rod unit 5 retreats, refer to Fig.12 As shown, during this process, the push head 51 of the push rod unit 5 is separated from the cutting knife 3, that is, the bottom wall (abutment wall 5111) of the limiting groove 511 on the push head is no longer abutted against the elastic part 321. At this time, the elastic part 321 is no longer affected by external force.

[0115] In the present invention, the elastic portion 321 will return to its natural state when no external force is applied. Since the second blade 32 is pivotally connected to the first blade 31, when the external force disappears, the second blade 32 is pivotally closed relative to the first blade 31 due to its own gravity. This design allows the first blade 31 and the second blade 32 to be safely stored in the cutting groove 11 when not in use, which not only protects the blades but also avoids accidental scratches. At the same time, this automatic closing function increases the convenience and safety of use, which meets the design requirements of medical devices.

[0116] It can be understood that in this embodiment, when the safety cover 4 is removed from the nail magazine 1, the external force on the elastic portion 321 also disappears, and when the external force disappears, the second blade 32 is in a pivoted closed state relative to the first blade 31. This has been described above and will not be repeated here.

[0117] refer to Figure 13-14 As shown, an embodiment of the present invention further provides a surgical instrument, including the end execution assembly as described above, and the working principle of the end execution assembly is as described above, which will not be repeated here.

[0118] In summary, the embodiments of the present invention achieve the following technical effects:

[0119] 1) The safety cover 4 is arranged on the nail magazine 1 and the nail pushing slider 2 is arranged at a predetermined position in the knife groove 11, so that the nail pushing slider 2 can squeeze the elastic part 321, and the second blade 32 can be clamped between the nail pushing slider 2 and the safety cover 4 under the action of elastic force, thereby preventing the second blade 32 from scratching the operator, and the first blade 31 itself is arranged in the knife groove 11. Such an arrangement can effectively prevent the cutting knife 3 from hurting the user;

[0120] 2) When the stapler needs to be used, the magazine unit 100 is installed on the magazine base 7, and then the safety cover 4 is removed. Then, a thrust is applied to the cutting knife through the push rod unit 5, so that the abutting wall 5111 abuts against the limiting side wall 3232, so that the elastic part 321 abuts against the staple pushing slider 2, and then the second blade 32 at least partially protrudes out of the upper surface of the staple magazine 1 for cutting the tissue to be cut. In this installation process, the user is prevented from contacting the cutting knife, which can effectively prevent the user from being cut by the cutting knife;

[0121] 3) When the elastic portion 321 is not subjected to external force (after the safety cover 4 is removed or the push rod unit is retracted), the second blade 32 is in a pivoted closed state relative to the first blade 31. This design allows both the first blade 31 and the second blade 32 to be safely stored in the blade groove 11 when not in use, which not only protects the blades but also avoids accidental scratches on the user.

[0122] Obviously, the embodiments described above are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0123] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0124] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0125] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An end effector assembly, characterized in that: The tool holder is provided with a plurality of locking members, each of which is provided with a plurality of locking members, and the locking members are provided with a plurality of locking members, each of which is provided with a plurality of locking members.

2. The end effector assembly according to claim 1, characterized in that: The cutting knife also includes a first blade and a mounting shaft arranged in the tool groove, the first blade is arranged on the nail pushing slider, the mounting shaft is arranged on the nail pushing slider along an axial direction perpendicular to the tool groove, the second blade is pivotally connected to the nail pushing slider through the mounting shaft and can pivot relative to the first blade, when the second blade at least partially protrudes out of the upper surface of the nail magazine, the first blade and the second blade intersect at an acute angle.

3. The end effector assembly according to claim 2, characterized in that: When the elastic portion is in a non-stressed state, the second blade can be pivoted toward the first blade to be received in the blade groove.

4. The end effector assembly according to claim 2, characterized in that: The second blade includes a blade body, which is pivotally connected to the mounting shaft. The blade body has a limiting side wall arranged toward the abutment portion and a cutting surface arranged away from the limiting side wall. The elastic portion is arranged on the side of the blade body where the limiting side wall is located, and extends away from the limiting side wall in a direction away from the blade body.

5. The end effector assembly according to claim 4, characterized in that: The abutting portion includes an abutting wall, and the abutting wall can abut against the limiting side wall, so that the push knife slider abuts against the elastic portion and the cutting surface at least partially protrudes out of the upper surface of the nail magazine.

6. The end effector assembly according to claim 5, characterized in that: The push rod unit includes a limiting groove arranged toward the second blade, the bottom wall of the limiting groove is arranged as the abutment wall, and the distance between the two side walls of the limiting groove is not less than the distance between one end of the blade body away from the elastic part and the end of the elastic part away from the blade body.

7. The end effector assembly according to claim 6, characterized in that: The push rod unit includes a push head and a push rod, the push head and the push rod are detachably connected, the push rod can drive the push head to move along the tool groove, and the limiting groove is arranged on the push head and at least partially protrudes out of the upper surface of the nail magazine.

8. The end effector assembly according to claim 1, characterized in that: It includes a nail anvil, a magazine base and a magazine unit located between the nail anvil and the magazine base, the magazine unit includes the nail magazine, the nail pushing slider, the cutting knife and the safety cover, one end of the nail anvil is pivotally connected to one end of the magazine base and the nail anvil can be pivoted relative to the magazine base to open or close, and the nail magazine is detachably arranged on the magazine base and is located between the nail anvil and the magazine base.

9. A surgical instrument, characterized in that: Comprising the end execution assembly as described in any one of claims 1-8.

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