Surgical operating instrument and staple cartridge assembly

Abstract

The invention discloses a surgical operating instrument and a staple cartridge assembly. The surgical operating instrument comprises a handle assembly, a gun barrel assembly, the staple cartridge assembly, an actuator assembly and a knife blocking piece. The nail bin assembly comprises a mounting base, a nail pushing piece and a cutting knife, the mounting base is provided with a plurality of mounting positions used for mounting suturing nails, the nail pushing piece and the cutting knife are both movably arranged on the mounting base and can both move from the near end to the far end of the mounting base, and the near end of the mounting base is provided with a percussion position. The cutter blocking piece can be switched from a first state to a second state, the cutter blocking piece allows the cutter to move from the percussion position to the far end of the mounting base in the first state, and the cutter blocking piece is used for preventing the cutter from moving to the percussion position in the second state. Due to the fact that the cutter blocking piece is additionally arranged, in the process that the transmission mechanism drives the cutter to move from the near end to the far end, the cutter blocking piece is switched from the first state to the second state so as to prevent the cutter from returning to the percussion position, and the cutter cannot be percussed for the second time.

Description

Surgical instrument and nail magazine assembly Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a surgical instrument and a nail magazine assembly. Background Art

[0002] Minimally invasive surgery currently plays an important role in surgical procedures, and staplers are commonly used surgical instruments in minimally invasive surgery. The stapler's working principle is to clamp the jaws of the distal actuator at a specific location near the lesion, excise the tissue with the distal actuator's cutting blade, and simultaneously suture the tissue using the distal actuator's stapler assembly.

[0003] In existing staplers, the cutting knife of the distal actuator is usually fixedly connected to the drive member, so the cutting knife cannot be replaced when the staple cartridge assembly is replaced. The repeated use of the cutting knife will reduce the sharpness of the cutting knife, thereby reducing the quality of the operation and bringing certain medical risks. On the other hand, the distal actuator usually uses a disposable staple cartridge assembly, but there is no safety device inside the existing staple cartridge assembly to prevent the staple cartridge assembly from being triggered a second time by the triggering device. The staple cartridge assembly that has been fired may be fired a second time, bringing serious medical risks. At the same time, the existing safety device usually requires the installation of a complex safety card component on the motion path of the transmission mechanism. There are many parts involved in the movement, and there are high requirements for the strength of the safety card component, which leads to a decrease in the reliability of the safety device. Technical issues

[0004] The main purpose of the present invention is to provide a nail magazine assembly with higher reliability and replaceable cutting blades, and a surgical instrument with the nail magazine assembly. Technical Solutions

[0005] In a first aspect, an embodiment provides a surgical instrument, comprising:

[0006] handle assembly;

[0007] a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism;

[0008] an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw;

[0009] A staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife. The mounting seat has a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat, and the proximal end of the mounting seat having a firing position.

[0010] and a knife blocking member, the knife blocking member being switchable from a first state to a second state, wherein the knife blocking member allows the cutting knife to move from the firing position toward the distal end of the mounting seat in the first state, and the knife blocking member is used to prevent the cutting knife from moving to the firing position in the second state;

[0011] The transmission mechanism can cooperate with the cutting knife located in the firing position. When the cutting knife is located in the firing position, the transmission mechanism is allowed to drive the cutting knife located in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat, and in the process of the cutting knife moving from the proximal end to the distal end, the knife blocking member is switched from the first state to the second state.

[0012] In one embodiment, the knife blocking member is configured as an elastic member. When the cutting knife is in the firing position, the elastic member can shrink to a first state under the pressure of the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can extend to a second state under the action of its own elastic force to prevent the cutting knife from moving from the far end of the mounting seat to the firing position.

[0013] In one embodiment, the mounting seat has a tissue-binding surface, and the elastic member can shrink and stretch in a movable plane that is not parallel to the tissue-binding surface to achieve switching between the first state and the second state.

[0014] In one embodiment, the elastic member is connected to the mounting seat.

[0015] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the protective plate, the second end of the elastic member contracts toward the protective plate in the first state, and the second end of the elastic member extends toward the nail magazine top wall in the second state.

[0016] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the nail magazine top wall, the second end of the elastic member contracts toward the nail magazine top wall in the first state, and the second end of the elastic member extends toward the protective plate in the second state.

[0017] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to one of the nail magazine side walls, the second end of the elastic member contracts toward the nail magazine side wall where the first end is located in the first state, and the second end of the elastic member extends toward the nail magazine side wall away from the first end in the second state.

[0018] In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member contracts toward the cutting knife in the first state, and the second end of the elastic member extends in a direction away from the cutting knife in the second state.

[0019] In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member contracts toward the cutting knife in the first state, and the second end of the elastic member extends in a direction away from the cutting knife in the second state.

[0020] In one embodiment, the elastic member is configured as a spring or a spring.

[0021] In one embodiment, the knife block member is rotatably arranged, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting seat, it can drive the knife block member to rotate relative to the mounting seat, so that the knife block member switches from the first state to the second state.

[0022] In one embodiment, the actuator assembly has a locking portion, which is used to lock with the transmission mechanism to prevent the transmission mechanism from moving axially along the actuator assembly; the transmission mechanism has a first unlocking portion, and the cutting knife has a second unlocking portion; when the cutting knife is in a firing position, the first unlocking portion of the transmission mechanism can cooperate with the second unlocking portion of the cutting knife to unlock the locking portion from the transmission mechanism.

[0023] In a second aspect, an embodiment provides a staple cartridge assembly, comprising:

[0024] A mounting base having a plurality of mounting positions for mounting suture staples, wherein a proximal end of the mounting base has a firing position;

[0025] A nail pushing member, the nail pushing member being movably arranged on the mounting seat;

[0026] A cutting knife, the cutting knife being movably arranged on the mounting seat, the nail pushing member and the cutting knife being able to move from the proximal end to the distal end of the mounting seat;

[0027] and a knife block member, which can be switched from a first state to a second state. In the first state, the knife block member allows the cutting knife to move from the firing position to the distal end of the mounting seat, and in the second state, the knife block member is used to prevent the cutting knife from moving to the firing position; when the cutting knife is in the firing position, the transmission mechanism of the surgical instrument is allowed to drive the cutting knife in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat, and the knife block member is switched from the first state to the second state during the movement of the cutting knife from the proximal end to the distal end.

[0028] In one embodiment, the knife blocking member is configured as an elastic member. When the cutting knife is in the firing position, the elastic member can shrink to a first state under the pressure of the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can extend to a second state under the action of its own elastic force to prevent the cutting knife from moving from the far end of the mounting seat to the firing position.

[0029] In one embodiment, the mounting seat has a tissue-binding surface, and the elastic member can shrink and stretch in a movable plane that is not parallel to the tissue-binding surface to achieve switching between the first state and the second state.

[0030] In one embodiment, the elastic member is connected to the mounting seat.

[0031] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the protective plate, the second end of the elastic member contracts toward the protective plate in the first state, and the second end of the elastic member extends toward the nail magazine top wall in the second state.

[0032] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the nail magazine top wall, the second end of the elastic member contracts toward the nail magazine top wall in the first state, and the second end of the elastic member extends toward the protective plate in the second state.

[0033] In one embodiment, the mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to one of the nail magazine side walls, the second end of the elastic member contracts toward the nail magazine side wall where the first end is located in the first state, and the second end of the elastic member extends toward the nail magazine side wall away from the first end in the second state.

[0034] In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member contracts toward the cutting knife in the first state, and the second end of the elastic member extends in a direction away from the cutting knife in the second state.

[0035] In one embodiment, the elastic member is configured as a spring or a spring.

[0036] In one embodiment, the knife block member is rotatably arranged, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting seat, it can drive the knife block member to rotate relative to the mounting seat, so that the knife block member switches from the first state to the second state.

[0037] In a third aspect, an embodiment provides a surgical instrument, comprising:

[0038] handle assembly;

[0039] a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism;

[0040] an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw;

[0041] A staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife. The mounting seat has a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat, and the proximal end of the mounting seat having a firing position.

[0042] a fastener having a connecting end and a free end, the connecting end of the fastener being connected to one of the staple cartridge assembly and the transmission mechanism, the other of the staple cartridge assembly and the transmission mechanism having a clamping portion; the free end of the fastener being able to move toward and away from the plane of the tissue engaging surface on the mounting seat to achieve engagement and disengagement with the clamping portion;

[0043] a knife block member, the knife block member being switchable from a first state to a second state, wherein the knife block member allows the cutting knife to move from the firing position toward the distal end of the mounting seat in the first state, and the knife block member is used to prevent the cutting knife from moving to the firing position in the second state;

[0044] The transmission mechanism can cooperate with the cutting knife located in the firing position. When the cutting knife is located in the firing position, the transmission mechanism is allowed to drive the cutting knife located in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.

[0045] In a fourth aspect, an embodiment provides a staple cartridge assembly, comprising:

[0046] A mounting seat, the mounting seat having a plurality of mounting positions for mounting suture staples;

[0047] A nail pushing member, the nail pushing member is movably arranged on the mounting seat, and the proximal end of the mounting seat has a firing position;

[0048] A cutting knife, the cutting knife being movably arranged on the mounting seat, the nail pushing member and the cutting knife being able to move from the proximal end to the distal end of the mounting seat;

[0049] a latch having a connecting end and a free end, wherein the free end of the latch is movable toward and away from the plane of the tissue engaging surface on the mounting seat to engage and disengage the engaging portion of the transmission mechanism on the surgical instrument;

[0050] And a knife block member, which can be switched from a first state to a second state. In the first state, the knife block member allows the cutting knife to move from the firing position to the distal end of the mounting seat, and in the second state, the knife block member is used to prevent the cutting knife from moving to the firing position; when the cutting knife is in the firing position, the transmission mechanism of the surgical instrument is allowed to drive the cutting knife in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat; after the cutting knife leaves the firing position, the knife block member switches from the first state to the second state.

[0051] In a fifth aspect, an embodiment provides a surgical instrument, comprising:

[0052] handle assembly;

[0053] a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism;

[0054] an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw;

[0055] and a staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife, the mounting seat having a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, and both the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat;

[0056] The transmission mechanism is used to cooperate with the cutting knife, and the transmission mechanism can only apply a thrust from the proximal end of the mounting seat to the distal end of the mounting seat to the cutting knife in the direction of the line connecting the proximal end and the distal end of the mounting seat.

[0057] In a sixth aspect, an embodiment provides a surgical instrument, comprising:

[0058] handle assembly;

[0059] a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism;

[0060] an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw;

[0061] and a staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife, the mounting seat having a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, and both the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat;

[0062] The transmission mechanism is capable of moving between the proximal end and the distal end of the mounting seat. When the transmission mechanism moves from the proximal end to the distal end of the mounting seat, the transmission mechanism cooperates with the cutting knife and drives the cutting knife to move from the proximal end to the distal end of the mounting seat; when the transmission mechanism moves from the distal end to the proximal end of the mounting seat, the transmission mechanism separates from the cutting knife. Beneficial effects

[0063] According to the above-described embodiment, the surgical instrument and staple cartridge assembly include a handle assembly, a barrel assembly, a staple cartridge assembly, an actuator assembly, and a knife block. The proximal end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a transmission mechanism. The distal end of the barrel assembly is connected to the actuator assembly, which includes a first jaw and a second jaw, each movably connected to the first jaw and capable of relative movement to close and open. A mounting cavity is formed between the first jaw and the second jaw. The staple cartridge assembly is disposed within the mounting cavity and includes a mounting base, a staple pusher, and a cutter. The mounting base has multiple mounting locations for staples. The staple pusher and cutter are both movably mounted on the mounting base and can move from the proximal end to the distal end of the mounting base, with the proximal end of the mounting base having a firing position. The knife block can switch from a first state to a second state. In the first state, the knife block allows the cutter to move from the firing position to the distal end of the mounting base. In the second state, the knife block prevents the cutter from moving to the firing position. The transmission mechanism is capable of cooperating with the cutting blade in the firing position. When the cutting blade is in the firing position, the transmission mechanism drives the cutting blade in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat. During this movement, the blade stopper switches from a first state to a second state. Due to the addition of the blade stopper, the blade stopper switches from the first state to the second state during the movement of the cutting blade from the proximal end to the distal end, preventing the cutting blade from returning to the firing position and thus preventing a second firing. Compared to conventional safety devices, this device eliminates the need for a complex safety latch to prevent the movement of the transmission mechanism. The blade stopper simply prevents the cutting blade from returning to the firing position, effectively preventing a second firing of the cutting blade. This device reduces the number of moving parts, thereby improving the reliability of the surgical instrument and the staple cartridge assembly. Furthermore, when the staple cartridge assembly is replaced, the cutting blade within the staple cartridge assembly can be replaced simultaneously, preventing the cutting blade from being reused and causing a loss of sharpness, thereby improving surgical quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic structural diagram of a surgical instrument according to an embodiment of the present application;

[0065] FIG2 is a schematic structural diagram of an actuator assembly, a staple cartridge assembly, and a transmission mechanism in one embodiment of the present application;

[0066] FIG3 is a cross-sectional view of an actuator assembly, a staple cartridge assembly, and a transmission mechanism in one embodiment of the present application;

[0067] FIG4 is an enlarged view of point A in FIG3 of the present application;

[0068] FIG5 is a schematic structural diagram of a staple cartridge assembly according to an embodiment of the present application;

[0069] FIG6 is an exploded view of a staple cartridge assembly according to an embodiment of the present application;

[0070] FIG7 is a cross-sectional view of the proximal end of the staple cartridge assembly in a first state of a knife block according to an embodiment of the present application;

[0071] FIG8 is a cross-sectional view of the proximal end of the staple cartridge assembly in a second state of the knife block according to an embodiment of the present application;

[0072] FIG9 is a schematic structural diagram of a staple cartridge assembly in a second embodiment of the present application in a first state of a knife block member;

[0073] FIG10 is a schematic structural diagram of the staple cartridge assembly in the second state of the knife block member in the second embodiment of the present application;

[0074] FIG11 is a schematic structural diagram of a protective plate and a knife-blocking member in a second embodiment of the present application;

[0075] 12 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly of the knife block member in the first state according to the third embodiment of the present application;

[0076] 13 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly of the knife block member in the second state according to the third embodiment of the present application;

[0077] 14 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly of the fourth embodiment of the present application in the first state of the knife block member;

[0078] 15 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly of the fourth embodiment of the present application in the second state of the knife block member;

[0079] 16 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly when the cutting knife is in the firing position according to the fifth embodiment of the present application;

[0080] 17 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly when the cutting blade is fired and in contact with the blade stop member in the fifth embodiment of the present application;

[0081] 18 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly when the cutting knife pushes the knife stop member to switch to the second state in the fifth embodiment of the present application;

[0082] 19 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly when the cutting blade retracts and is blocked by the blade blocking member in the fifth embodiment of the present application;

[0083] FIG20 is a schematic structural diagram of a cutting knife and a nail pushing member in a sixth embodiment of the present application that does not include a fastener;

[0084] FIG21 is a schematic diagram of the structure of the transmission mechanism in the sixth embodiment of the present application when it is ready to cooperate with the cutting knife in the firing position;

[0085] FIG22 is a schematic diagram of the structure of the sixth embodiment of the present application when the transmission mechanism and the cutting knife in the firing position are fully engaged;

[0086] FIG23 is a schematic structural diagram of a sixth embodiment of the present application in which the transmission mechanism retracts and separates from the fired cutting blade;

[0087] Figure markings: 100, handle assembly; 110, fixed handle; 120, trigger; 200, barrel assembly; 210, transmission mechanism; 211, first unlocking part; 300, actuator assembly; 310, first jaw; 311, accommodating groove; 320, second jaw; 330, locking part; 400, nail magazine assembly; 410, mounting seat; 411, tissue bonding surface; 412, nail magazine plate; 4121, nail magazine top wall; 4122, nail magazine side wall; 413, protective plate; 414, knife blocking groove; 420, nail pushing member; 430, cutting knife; 431, second unlocking part; 500, knife blocking member; 510, elastic member; 520, knife blocking protrusion; 600, snap member; 700, snap-fitting part. Modes for Carrying Out the Invention

[0088] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0089] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0090] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0091] The stapler is a surgical instrument commonly used in minimally invasive surgery. Please refer to Figure 1. The stapler generally includes a handle assembly 100, a barrel assembly 200 and an actuator assembly 300. The barrel assembly 200 includes a closing transmission chain and a firing transmission chain. The handle assembly 100 includes a fixed handle 110 and at least one trigger 120.

[0092] To operate the stapler, the operator grasps the fixed handle 110 and inserts the actuator assembly 300 into the affected area within the human body via the elongated barrel assembly 200. The trigger 120 then triggers the closing transmission chain, causing the jaws of the actuator assembly 300 to close and clamp at a specific location near the affected area. The trigger 120 then triggers the firing transmission chain, causing the cutting blade 430 within the actuator assembly 300 to excise tissue and simultaneously staple the tissue within the actuator assembly 300. In other embodiments, the closing and firing operations can be implemented in other ways, such as using two triggers 120 to operate separately to perform closing and firing, or using an electric closing and firing mechanism.

[0093] In this embodiment, the "distal end" refers to the end of the surgical instrument that is away from the operator when operating the surgical instrument, and the "proximal end" refers to the end of the surgical instrument that is closer to the operator when operating the surgical instrument. In this embodiment, the "axial direction" refers to the direction of the line connecting the center of the distal end and the center of the proximal end, and the "radial direction" refers to the direction perpendicular to the axial direction.

[0094] Please refer to Figure 1-23. This embodiment provides a surgical instrument.

[0095] The surgical instrument includes a handle assembly 100, a barrel assembly 200, a staple cartridge assembly 400, an actuator assembly 300, and a blade stop 500. The proximal end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210. The distal end of the barrel assembly 200 is connected to the actuator assembly 300, which includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to close and open. A mounting cavity is formed between the first jaw 310 and the second jaw 320. The staple cartridge assembly 400 is intended to be disposed within the mounting cavity and includes a mounting base 410, a staple pusher 420, and a cutter 430. The mounting base 410 has a plurality of mounting positions for mounting staples. The staple pusher 420 and the cutter 430 are both movably disposed on the mounting base 410 and are capable of moving from the proximal end to the distal end of the mounting base 410. The proximal end of the mounting base 410 has a firing position. The blade stop 500 is capable of switching from a first state to a second state. In the first state, the blade stop 500 allows the cutter 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the blade stop 500 prevents the cutter 430 from moving to the firing position. The transmission mechanism 210 can cooperate with the cutting knife 430 located in the firing position. When the cutting knife 430 is located in the firing position, the transmission mechanism 210 is allowed to drive the cutting knife 430 located in the firing position to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410, and in the process of the cutting knife 430 moving from the proximal end to the distal end, the knife blocking member 500 is switched from the first state to the second state.

[0096] On the one hand, due to the addition of the blade stop 500, when the transmission mechanism 210 drives the cutting blade 430 from the proximal end to the distal end, the blade stop 500 switches from a first state to a second state, preventing the cutting blade 430 from returning to the firing position, thus preventing the cutting blade 430 from being fired a second time. Compared with traditional safety devices, there is no need for a complex safety latch to prevent the movement of the transmission mechanism 210. The blade stop 500 simply prevents the cutting blade 430 from returning to the firing position, thereby preventing the cutting blade 430 from being fired a second time. This reduces the number of moving parts, thereby improving the reliability of the surgical instrument and the staple cartridge assembly 400. On the other hand, when the staple cartridge assembly 400 is replaced, the cutting blade 430 in the staple cartridge assembly 400 can be replaced simultaneously, preventing the cutting blade 430 from being reused and causing a loss of sharpness, thereby improving surgical quality.

[0097] It should be noted that the firing position of the mounting base 410 refers to the initial position of the unfired cutting blade 430 on the mounting base 410 at the proximal end of the mounting base 410. The surgical instrument may or may not include the staple cartridge assembly 400. That is, when the surgical instrument includes the staple cartridge assembly 400, the staple cartridge assembly 400 is considered a part of the surgical instrument. When the surgical instrument does not include the staple cartridge assembly 400, the staple cartridge assembly 400 is considered an accessory or consumable of the surgical instrument.

[0098] On the other hand, this embodiment also provides a nail magazine assembly 400.

[0099] 2-8 , the staple cartridge assembly 400 includes a mounting base 410 , a staple pusher 420 , a cutting blade 430 , and a blade blocking member 500 .

[0100] The mounting base 410 has multiple mounting locations for staples, and the proximal end of the mounting base 410 has a firing position. A staple pusher 420 is movably mounted on the mounting base 410. A cutting blade 430 is movably mounted on the mounting base 410, and both the staple pusher 420 and the cutting blade 430 are movable from the proximal end to the distal end of the mounting base 410. A blade stopper 500 is switchable between a first state and a second state. In the first state, the blade stopper 500 allows the cutting blade 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the blade stopper 500 prevents the cutting blade 430 from moving to the firing position. When the cutting blade 430 is in the firing position, the transmission mechanism 210 of the surgical instrument allows the cutting blade 430, in the firing position, to move from the proximal end to the distal end of the mounting base 410. The blade stopper 500 switches from the first state to the second state during the cutting blade 430's movement from the proximal end to the distal end.

[0101] Please refer to Figures 5-8. In one embodiment, the knife blocking member 500 is configured as an elastic member 510. When the cutting knife 430 is in the firing position, the elastic member 510 can shrink to the first state under the pressure of the cutting knife 430 or the nail pushing member 420. After the transmission structure fires the cutting knife 430, the elastic member 510 can extend to the second state under the action of its own elastic force to prevent the cutting knife 430 from moving from the far end of the mounting seat 410 to the firing position.

[0102] When the blade stopper 500 utilizes the elastic member 510, the elastic member 510 switches between the first and second states by contracting under external force and expanding under its own elastic force. Specifically, in actual application scenarios, after the transmission mechanism 210 fires the cutting blade 430, the cutting blade 430 or the nail pusher 420 releases the pressure on the blade stopper 500 due to its own displacement, allowing the blade stopper 500 to automatically switch from the first state to the second state under the action of its own elastic force. This fully utilizes the elastic force of the blade stopper 500 to reduce the number of steps required to switch between the blade stopper 500 states.

[0103] It should be noted that the meanings of the first state and the second state of the knife stop member 500 are not limited to the extended state and the contracted state of the elastic member 510. In other implementations, the knife stop member 500 may not be the elastic member 510, but a movably arranged rigid member. The first state and the second state of the knife stop member 500 are defined by driving the rigid member to move to different positions or postures.

[0104] 5-8 , in one embodiment, the mounting seat 410 has a tissue-binding surface 411 , and the elastic member 510 can contract and stretch within a movable plane that is not parallel to the tissue-binding surface 411 to achieve switching between a first state and a second state.

[0105] Since the movable plane of the elastic member 510 is not parallel to the tissue bonding surface 411, the elastic member 510 changes the distance between the elastic member 510 and the cutting knife 430 and the nail pushing member 420 in a direction perpendicular to the tissue bonding surface 411 when it contracts and stretches, thereby realizing the switching of the elastic member 510 between a first state that allows the cutting knife 430 to retreat to a firing position and a second state that prevents the cutting knife 430 from retreating to the firing position.

[0106] It should be noted that the tissue engaging surface 411 of the mounting seat 410 refers to the side of the mounting seat 410 that contacts the clamped tissue when clamping the tissue. It is understandable that when suturing the tissue, the suture nail is pushed out from the tissue engaging surface 411 of the mounting seat 410 to achieve suturing of the tissue.

[0107] Please refer to Figures 5-8. In one embodiment, the movement plane of the elastic member 510 is perpendicular to the tissue-binding surface 411.

[0108] When the elastic member 510 is perpendicular to the tissue-engaging surface 411, the elastic member 510 can switch between the first state and the second state with minimal deformation. Of course, in other embodiments, the movement plane of the elastic member 510 can also be at an angle of 30°, 60°, or other suitable angles to the tissue-engaging surface 411.

[0109] 5-11 , in one embodiment, the elastic member 510 is connected to the mounting base 410 .

[0110] Since the elastic member 510 is connected to the mounting base 410, when the operator installs and removes the mounting base 410 from the actuator assembly 300, the elastic member 510 can be installed and removed at the same time, which is beneficial to reduce the structural complexity of the actuator assembly 300 and reduce the operator's disassembly steps.

[0111] Specifically, the elastic member 510 can be connected to various positions on the mounting base 410 .

[0112] For example, referring to Figures 5-8, in a first connection scheme, the elastic member 510 is connected to the top of the mounting base 410. The mounting base 410 includes a staple cartridge plate 412 and a protective plate 413. The staple cartridge plate 412 has a staple cartridge top wall 4121 and two staple cartridge side walls 4122. The mounting position is located on the staple cartridge top wall 4121. The two staple cartridge side walls 4122 are disposed on opposite sides of the staple cartridge top wall 4121 and extend axially along the mounting base 410. The protective plate 413 is connected to the staple cartridge side walls 4122 and is disposed opposite to the staple cartridge top wall 4121. The first end of the elastic member 510 is connected to the staple cartridge top wall 4121. The second end of the elastic member 510 contracts toward the staple cartridge top wall 4121 in a first state. The second end of the elastic member 510 extends toward the protective plate 413 in a second state.

[0113] When the cutting blade 430 is in the firing position, the second end of the elastic member 510 contracts toward the staple cartridge top wall 4121 under the pressure of the cutting blade 430 or the nail pusher 420, causing the elastic member 510 to switch to the first state. After the cutting blade 430 is fired, the second end of the elastic member 510 extends toward the protective plate 413 under its own elastic force, causing the elastic member 510 to switch to the second state. Specifically, in this embodiment, the elastic member 510 is a spring; in other embodiments, the elastic member 510 may also be a spring.

[0114] For another example, referring to Figures 9-11, in a second connection scheme, the elastic member 510 is connected to the bottom of the mounting base 410. The mounting base 410 includes a staple cartridge plate 412 and a protective plate 413. The staple cartridge plate 412 has a staple cartridge top wall 4121 and two staple cartridge bottoms, and is mounted on the staple cartridge top wall 4121. The two staple cartridge side walls 4122 are disposed on opposite sides of the staple cartridge top wall 4121 and extend axially along the mounting base 410. The protective plate 413 is connected to the staple cartridge side walls 4122 and is disposed opposite the staple cartridge top wall 4121. The first end of the elastic member 510 is connected to the protective plate 413. The second end of the elastic member 510 contracts toward the protective plate 413 in the first state, and extends toward the staple cartridge top wall 4121 in the second state.

[0115] When the cutting blade 430 is in the firing position, the second end of the elastic member 510 contracts toward the protective plate 413 under the pressure of the cutting blade 430 or the nail pusher 420, causing the elastic member 510 to switch to the first state. After the cutting blade 430 is fired, the second end of the elastic member 510 extends toward the staple cartridge top wall 4121 under its own elastic force, causing the elastic member 510 to switch to the second state. Specifically, in this embodiment, the elastic member 510 is a spring, and springs are provided on opposite sides of the proximal end of the protective plate.

[0116] For example, in the third connection scheme, the elastic member 510 is connected to the side of the mounting base 410. The mounting base 410 includes a staple cartridge plate 412 and a protective plate 413. The staple cartridge plate 412 has a staple cartridge top wall 4121 and two staple cartridge side walls 4122. The mounting position is located on the staple cartridge top wall 4121. The two staple cartridge side walls 4122 are disposed on opposite sides of the staple cartridge top wall 4121 and extend axially along the mounting base 410. The protective plate 413 is connected to the staple cartridge side walls 4122 and is disposed opposite the staple cartridge top wall 4121. The first end of the elastic member 510 is connected to one of the staple cartridge side walls 4122. The second end of the elastic member 510 contracts toward the staple cartridge side wall 4122 where the first end is located in the first state. The second end of the elastic member 510 extends toward the staple cartridge side wall 4122 away from the first end in the second state.

[0117] When the cutting blade 430 is in the firing position, the second end of the elastic member 510 contracts toward the staple cartridge sidewall 4122 where the first end is located under the pressure of the cutting blade 430 or the nail pushing member 420, causing the elastic member 510 to switch to the first state. When the cutting blade 430 is fired, the second end of the elastic member 510 extends toward the staple cartridge sidewall 4122 away from the first end under the action of its own elastic force, causing the elastic member 510 to switch to the second state.

[0118] Specifically, the connection between the elastic member 510 and the staple cartridge top wall 4121, staple cartridge side wall 4122, or protective plate 413 of the mounting base 410 can be adhesive, clamping, welding, threaded connection, or other suitable connection methods. The elastic member 510 can be a spring, a spring, an elastic block, or other suitable elastic structure.

[0119] Of course, in other embodiments, the elastic member 510 may not be connected to the mounting base 410 , but may be connected to the actuator assembly 300 , the cutting blade 430 , the nail pushing member 420 , or the like.

[0120] For example, referring to Figures 12 and 13, in one embodiment, the first end of the elastic member 510 is connected to the cutting knife 430, the second end of the elastic member 510 contracts toward the cutting knife 430 in the first state, and the second end of the elastic member 510 extends in a direction away from the cutting knife 430 in the second state.

[0121] When the cutting blade 430 is in the firing position, the second end of the elastic member 510 contracts toward the cutting blade 430 under the action of the compressive force, causing the elastic member 510 to switch to the first state. When the cutting blade 430 is fired, the second end of the elastic member 510 extends away from the cutting blade 430 under the action of its own elastic force, causing the elastic member 510 to switch to the second state. Specifically, when the cutting blade 430 is in the firing position, the elastic member 510 may maintain the first state due to the compressive force of the inner wall of the mounting base 410, or due to the compressive force of the actuator assembly 300 or other components.

[0122] For another example, referring to Figures 14 and 15, in one embodiment, the first end of the elastic member 510 is connected to the first jaw 310 or the second jaw 320 of the actuator assembly 300, and the second end of the elastic member 510 contracts toward the first jaw 310 or the second jaw 320 where the first end is located in the first state, and the second end of the elastic member 510 extends toward the mounting seat 410 in the second state.

[0123] When the cutting blade 430 is in the firing position, the second end of the elastic member 510 contracts toward the first jaw 310 or the second jaw 320 where the first end is located under the squeezing force of the cutting blade 430 or the nail pusher 420, causing the elastic member 510 to switch to the first state. When the cutting blade 430 is fired, the second end of the elastic member 510 extends toward the mounting base 410 under the action of its own elastic force, causing the elastic member 510 to switch to the second state.

[0124] Specifically, referring to Figures 14 and 15 , the first jaw 310 has a receiving slot 311, within which the elastic member 510 is disposed. Referring to Figure 14 , when the cutting blade 430 is in the firing position, the elastic member 510 contracts under the pressure of the nail pusher 420 and is retracted into the receiving slot 311, maintaining the first position. Referring to Figure 15 , after the cutting blade 430 is fired, the elastic member 510 extends out of the receiving slot 311 under its own elastic force, switching to the second position. Of course, in other embodiments, the elastic member 510 may also be connected to the second jaw 320.

[0125] It should be noted that the use of the elastic member 510 for the knife stopper 500 has the advantages of a simple structure and automatic state switching through its own elastic force. However, this does not mean that the knife stopper 500 can only use the elastic member 510. In other embodiments, the knife stopper 500 may not be the elastic member 510, but rather a movable rigid member. The knife stopper 500 can be switched between the first state and the second state by driving the rigid member to move to different positions or postures.

[0126] For example, please refer to Figures 16-19. In one embodiment, the knife block member 500 is rotatably arranged. When the transmission mechanism 210 drives the cutting knife 430 to move from the firing position to the distal end of the mounting seat 410, it can drive the knife block member 500 to rotate relative to the mounting seat 410, so that the knife block member 500 switches from the first state to the second state, and the state switching is achieved by the rotation of the knife block member 500.

[0127] 16-19 , in one embodiment, a blade stopper 500 is provided with a blade stopper protrusion 520 at one end, and a blade stopper recess 414 is provided on the mounting base 410 to engage with the blade stopper protrusion 520. When the cutting blade 430 is fired, the portion of the cutting blade 430 that contacts the blade stopper 500 drives the blade stopper 500 to rotate relative to the mounting base 410, causing the blade stopper protrusion 520 to engage with the blade stopper recess 414, thereby preventing the cutting blade 430 from retreating to the firing position via the other end of the blade stopper 500. In other embodiments, the engagement between the blade stopper 500 and the mounting base 410 is not limited to an engagement engagement; for example, the blade stopper 500 may be magnetically engaged with the mounting base 410 or adhesively bonded to the mounting base 410.

[0128] Of course, in other embodiments, the rigid member is not limited to a rotational setting. For example, the rigid member can also be set to slide along an inclined ramp, and the rigid member can be moved by sliding on the ramp to allow and prevent the cutting knife 430 from retreating to the firing position.

[0129] 2-4 , in one embodiment, the actuator assembly 300 includes a locking portion 330 that is configured to lock with the transmission mechanism 210 to prevent the transmission mechanism 210 from moving axially along the actuator assembly 300. The transmission mechanism 210 includes a first unlocking portion 211, and the cutting blade 430 includes a second unlocking portion 431. When the cutting blade 430 is in the firing position, the first unlocking portion 211 of the transmission mechanism 210 engages with the second unlocking portion 431 of the cutting blade 430 to unlock the locking portion 330 from the transmission mechanism 210.

[0130] On the one hand, when the locking portion 330 on the actuator assembly 300 is used to lock the transmission mechanism 210, compared to traditional technical solutions, the safety function can be achieved by simply adding features to existing parts, without adding a complex safety latch and spring drive structure. This helps improve the reliability of the safety function and avoids the risk of the safety latch falling into the human body after failure. On the other hand, when the cutting blade 430 is in the firing position, the first unlocking portion 211 on the transmission mechanism 210 and the second unlocking portion 431 on the staple cartridge assembly 400 are used to unlock the transmission mechanism 210, ensuring that the cutting blade 430 in the firing position can be fired by the transmission mechanism 210.

[0131] It is understandable that the time for the knife block 500 to switch from the first state to the second state may not be limited to the process of the cutting knife 430 moving from the proximal end to the distal end. As long as the cutting knife 430 leaves the firing position, the knife block 500 can switch from the first state to the second state.

[0132] For example, referring to Figures 1-8, this embodiment also provides a surgical instrument.

[0133] 1-8 , the surgical instrument includes a handle assembly 100 , a barrel assembly 200 , an actuator assembly 300 , a staple cartridge assembly 400 , a locking member 600 , and a knife block 500 .

[0134] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism 210. The distal end of the barrel assembly 200 is connected to the actuator assembly 300. The actuator assembly 300 includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to close and open. A mounting cavity is formed between the first jaw 310 and the second jaw 320. The staple cartridge assembly 400 is disposed within the mounting cavity and includes a mounting base 410, a staple pusher 420, and a cutter 430. The mounting base 410 has multiple mounting positions for suture staples. The staple pusher 420 and the cutter 430 are both movably mounted on the mounting base 410 and can move from the proximal end to the distal end of the mounting base 410. The proximal end of the mounting base 410 has a firing position. The fastener 600 has a connecting end and a free end. The connecting end of the fastener 600 is connected to one of the staple cartridge assembly 400 and the transmission mechanism 210. The other of the staple cartridge assembly 400 and the transmission mechanism 210 has a clamping portion 700. The free end of the fastener 600 can move toward and away from the plane where the tissue engaging surface 411 of the mounting seat 410 is located to achieve engagement and disengagement with the clamping portion 700.

[0135] The blade stopper 500 can be switched from a first state to a second state. In the first state, the blade stopper 500 allows the cutting blade 430 to move from the firing position toward the distal end of the mounting base 410. In the second state, the blade stopper 500 is used to prevent the cutting blade 430 from moving to the firing position. The transmission mechanism 210 can cooperate with the cutting blade 430 in the firing position. When the cutting blade 430 is in the firing position, the transmission mechanism 210 allows the cutting blade 430 in the firing position to move from the proximal end of the mounting base 410 to the distal end of the mounting base 410. After the cutting blade 430 leaves the firing position, the blade stopper 500 switches from the first state to the second state.

[0136] On the one hand, due to the addition of the fastener 600 and the clamping portion 700, the fastener 600 can be moved toward the plane where the tissue-engaging surface 411 on the mounting seat 410 is located to achieve clamping engagement with the clamping portion 700, thereby achieving clamping engagement between the staple cartridge assembly 400 and the transmission mechanism 210. The fastener 600 can be moved away from the plane where the tissue-engaging surface 411 on the mounting seat 410 is located to achieve disengagement from the clamping portion 700, thereby achieving disengagement between the staple cartridge assembly 400 and the transmission mechanism 210, thereby facilitating improved reliability of the engagement and disengagement between the staple cartridge assembly 400 and the transmission mechanism 210. On the other hand, the timing for the knife block member 500 to switch from the first state to the second state is not limited to when the cutting blade 430 moves from the proximal end to the distal end. For example, the knife block member 500 may also switch from the first state to the second state when the cutting blade 430 moves from the distal end to the proximal end and has not yet reached the firing position, as long as the cutting blade 430 leaves the firing position when the knife block member 500 changes state. This increases the flexibility of the timing for selecting the state change of the knife block member 500 and expands the number of possible implementation options for the specific structure of the knife block member 500.

[0137] Based on the above-mentioned surgical instrument with the fastener 600 and the clamping portion 700 , please refer to Figures 1-8 , this embodiment also provides a nail magazine assembly 400.

[0138] 1-8 , the staple cartridge assembly 400 includes a mounting base 410 , a staple pusher 420 , a cutting blade 430 , a locking member 600 , and a blade blocking member 500 .

[0139] The mounting base 410 has multiple mounting locations for suture staples. A staple pusher 420 is movably mounted on the mounting base 410, with a firing position at the proximal end of the mounting base 410. A cutting blade 430 is movably mounted on the mounting base 410, and both the staple pusher 420 and the cutting blade 430 are movable from the proximal end to the distal end of the mounting base 410. The latch 600 has a connecting end and a free end. The free end of the latch 600 is movable toward and away from the plane of the tissue-engaging surface 411 on the mounting base 410 to engage and disengage with the latching portion 700 of the transmission mechanism 210 on the surgical instrument.

[0140] The knife stopper 500 can be switched from a first state to a second state. In the first state, the knife stopper 500 allows the cutting blade 430 to move from the firing position toward the distal end of the mounting base 410. In the second state, the knife stopper 500 is used to prevent the cutting blade 430 from moving to the firing position. When the cutting blade 430 is in the firing position, the transmission mechanism 210 of the surgical instrument is allowed to drive the cutting blade 430 in the firing position to move from the proximal end of the mounting base 410 to the distal end of the mounting base 410. After the cutting blade 430 leaves the firing position, the knife stopper 500 switches from the first state to the second state.

[0141] It is understandable that, in some embodiments, the cutting knife 430 can be prevented from being fired a second time by preventing the cutting knife 430 from returning after leaving the firing position.

[0142] For example, referring to Figures 20-23, this embodiment also provides a surgical instrument.

[0143] 20-23 , the surgical instrument includes a handle assembly 100 , a barrel assembly 200 , an actuator assembly 300 , and a staple cartridge assembly 400 .

[0144] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism 210. The distal end of the barrel assembly 200 is connected to the actuator assembly 300. The actuator assembly 300 includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to close and open. A mounting cavity is formed between the first jaw 310 and the second jaw 320.

[0145] The staple cartridge assembly 400 is disposed within the mounting cavity and includes a mounting base 410, a staple pusher 420, and a cutter 430. The mounting base 410 has multiple mounting positions for suture staples. The staple pusher 420 and the cutter 430 are both movably mounted on the mounting base 410 and are capable of moving from the proximal end to the distal end of the mounting base 410. The transmission mechanism 210 is configured to cooperate with the cutter 430, and the transmission mechanism 210 is capable of applying a thrust to the cutter 430 only from the proximal end of the mounting base 410 toward the distal end of the mounting base 410 in the direction of the line connecting the proximal and distal ends of the mounting base 410.

[0146] Since the transmission mechanism 210 can only apply a thrust from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410 to the cutting knife 430 in the direction of the line connecting the proximal end and the distal end of the mounting seat 410, the transmission mechanism 210 can only drive the cutting knife 430 to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410, but cannot drive the cutting knife 430 to move from the distal end to the proximal end of the mounting seat 410, so that the cutting knife 430 cannot retreat to the firing position, thereby preventing the transmission mechanism 210 from firing the cutting knife 430 a second time.

[0147] For another example, please refer to Figures 20-23. This embodiment also provides a surgical instrument.

[0148] 20-23 , the surgical instrument includes a handle assembly 100 , a barrel assembly 200 , an actuator assembly 300 , and a staple cartridge assembly 400 .

[0149] The proximal end of the barrel assembly 200 is connected to the handle assembly 100. The barrel assembly 200 includes a transmission mechanism 210. The distal end of the barrel assembly 200 is connected to the actuator assembly 300. The actuator assembly 300 includes a first jaw 310 and a second jaw 320. The first jaw 310 and the second jaw 320 are movably connected and can move relative to each other to close and open. A mounting cavity is formed between the first jaw 310 and the second jaw 320. The staple cartridge assembly 400 is disposed within the mounting cavity and includes a mounting base 410, a staple pusher 420, and a cutting blade 430. The mounting base 410 has multiple mounting locations for suture staples. The staple pusher 420 and the cutting blade 430 are both movably mounted on the mounting base 410 and can move from the proximal end to the distal end of the mounting base 410.

[0150] The transmission mechanism 210 is movable between the proximal end and the distal end of the mounting seat 410. When the transmission mechanism 210 moves from the proximal end to the distal end of the mounting seat 410, the transmission mechanism 210 cooperates with the cutting blade 430 and drives the cutting blade 430 to move from the proximal end to the distal end of the mounting seat 410. When the transmission mechanism 210 moves from the distal end to the proximal end of the mounting seat 410, the transmission mechanism 210 separates from the cutting blade 430.

[0151] The transmission mechanism 210 can only drive the cutting knife 430 to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410. When the transmission mechanism 210 moves toward the proximal end of the mounting seat 410, the transmission mechanism 210 separates from the cutting knife 430 and cannot drive the cutting knife 430 to move toward the proximal end of the mounting seat 410.

[0152] 20-23 , it can be understood that the two solutions of limiting the direction of force applied by the transmission mechanism 210 to the cutting blade 430 and limiting the timing of cooperation and separation between the transmission mechanism 210 and the cutting blade 430 can be used alone or in combination.

[0153] For example, referring to Figures 20-23, when the above two solutions are used in combination, the transmission mechanism 210 has a first unlocking portion 211, and the cutting blade 430 has a second unlocking portion 431. Compared with Figures 4-8, it can be seen that the latching member 600 and the engaging portion 700 shown in Figures 4-8 are not provided between the transmission mechanism 210 and the cutting blade 430. When the transmission mechanism 210 moves from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410, the first unlocking portion 211 cooperates with the second unlocking portion 431, and the transmission mechanism 210 applies a thrust from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410 to the cutting blade 430, thereby driving the cutting blade 430 to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410. When the transmission mechanism 210 moves from the distal end of the mounting seat 410 to the proximal end of the mounting seat 410, the first unlocking portion 211 separates from the second unlocking portion 431, and the transmission mechanism 210 cannot apply a pulling force from the distal end of the mounting seat 410 to the proximal end of the mounting seat 410 to the cutting knife 430, so that the cutting knife 430 cannot retreat to the firing position.

[0154] It should be noted that the timing of the separation of the transmission mechanism 210 and the cutting blade 430 can be direct separation when the transmission mechanism 210 moves toward the proximal end of the mounting seat 410, or the transmission mechanism 210 can drive the cutting blade 430 to move a certain distance toward the proximal end of the mounting seat 410 and then separate from the cutting blade 430, as long as the cutting blade 430 is prevented from moving to the firing position. For example, the transmission mechanism 210 and the cutting blade 430 are connected by a retraction protrusion mechanism and a retraction groove. The retraction protrusion structure is made of a deformable material. When the transmission mechanism 210 moves toward the proximal end of the mounting seat 410, the retraction protrusion mechanism engages with the retraction groove to drive the cutting blade 430 to move a certain distance toward the proximal end of the mounting seat 410. In addition, because the retraction protrusion gradually deforms during the movement toward the proximal end of the mounting seat 410, the retraction protrusion eventually separates from the retraction groove, preventing the cutting blade 430 from continuing to move to the firing position.

[0155] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A surgical instrument, characterized in that: include: handle assembly; a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism; an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw; A staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife. The mounting seat has a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat, and the proximal end of the mounting seat having a firing position. and a knife blocking member, the knife blocking member being switchable from a first state to a second state, wherein the knife blocking member allows the cutting knife to move from the firing position toward the distal end of the mounting seat in the first state, and the knife blocking member is used to prevent the cutting knife from moving to the firing position in the second state; The transmission mechanism can cooperate with the cutting knife located in the firing position. When the cutting knife is located in the firing position, the transmission mechanism is allowed to drive the cutting knife located in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat, and in the process of the cutting knife moving from the proximal end to the distal end, the knife blocking member is switched from the first state to the second state.

2. The surgical instrument according to claim 1, wherein: The knife blocking member is configured as an elastic member. When the cutting knife is in the firing position, the elastic member can shrink to the first state under the pressure of the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can extend to the second state under the action of its own elastic force to prevent the cutting knife from moving from the far end of the mounting seat to the firing position.

3. The surgical instrument according to claim 2, wherein: The mounting seat has a tissue-binding surface, and the elastic member can shrink and stretch in a movable plane that is not parallel to the tissue-binding surface to achieve switching between the first state and the second state.

4. The surgical instrument according to claim 2, wherein: The elastic member is connected to the mounting seat.

5. The surgical instrument according to claim 3, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the protective plate, the second end of the elastic member contracts toward the protective plate in the first state, and the second end of the elastic member extends toward the nail magazine top wall in the second state.

6. The surgical instrument according to claim 3, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the nail magazine top wall, the second end of the elastic member contracts toward the nail magazine top wall in the first state, and the second end of the elastic member extends toward the protective plate in the second state.

7. The surgical instrument according to claim 3, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to one of the nail magazine side walls, the second end of the elastic member contracts toward the nail magazine side wall where the first end is located in the first state, and the second end of the elastic member extends toward the nail magazine side wall away from the first end in the second state.

8. The surgical instrument according to claim 2, wherein: The first end of the elastic member is connected to the cutting knife, the second end of the elastic member contracts toward the cutting knife in a first state, and the second end of the elastic member extends in a direction away from the cutting knife in a second state.

9. The surgical instrument according to claim 2, wherein: The first end of the elastic member is connected to the first jaw or the second jaw of the actuator assembly, the second end of the elastic member contracts toward the first jaw or the second jaw where the first end is located in the first state, and the second end of the elastic member extends toward the mounting seat in the second state.

10. The surgical instrument according to claim 2, wherein: The elastic member is configured as a spring or a spring.

11. The surgical instrument according to claim 1, wherein: The knife stop member is rotatably arranged, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting seat, it can drive the knife stop member to rotate relative to the mounting seat, so that the knife stop member switches from the first state to the second state.

12. The surgical instrument according to any one of claims 1 to 11, wherein: The actuator assembly has a locking portion, which is used to lock with the transmission mechanism to prevent the transmission mechanism from moving axially along the actuator assembly; the transmission mechanism has a first unlocking portion, and the cutting knife has a second unlocking portion; when the cutting knife is in a fireable position, the first unlocking portion of the transmission mechanism can cooperate with the second unlocking portion of the cutting knife to unlock the locking portion from the transmission mechanism.

13. A staple cartridge assembly, characterized in that: include: A mounting base having a plurality of mounting positions for mounting suture staples, wherein a proximal end of the mounting base has a firing position; A nail pushing member, the nail pushing member being movably arranged on the mounting seat; A cutting knife, the cutting knife being movably arranged on the mounting seat, the nail pushing member and the cutting knife being able to move from the proximal end to the distal end of the mounting seat; and a knife block member, which can be switched from a first state to a second state. In the first state, the knife block member allows the cutting knife to move from the firing position to the distal end of the mounting seat, and in the second state, the knife block member is used to prevent the cutting knife from moving to the firing position; when the cutting knife is in the firing position, the transmission mechanism of the surgical instrument is allowed to drive the cutting knife in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat, and the knife block member is switched from the first state to the second state during the movement of the cutting knife from the proximal end to the distal end.

14. The staple cartridge assembly according to claim 13, wherein: The knife blocking member is configured as an elastic member. When the cutting knife is in the firing position, the elastic member can shrink to the first state under the pressure of the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can extend to the second state under the action of its own elastic force to prevent the cutting knife from moving from the far end of the mounting seat to the firing position.

15. The staple cartridge assembly according to claim 14, wherein: The mounting seat has a tissue-binding surface, and the elastic member can shrink and stretch in a movable plane that is not parallel to the tissue-binding surface to achieve switching between the first state and the second state.

16. The staple cartridge assembly according to claim 14, wherein: The elastic member is connected to the mounting seat.

17. The staple cartridge assembly according to claim 16, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the protective plate, the second end of the elastic member contracts toward the protective plate in the first state, and the second end of the elastic member extends toward the nail magazine top wall in the second state.

18. The staple cartridge assembly according to claim 16, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to the nail magazine top wall, the second end of the elastic member contracts toward the nail magazine top wall in the first state, and the second end of the elastic member extends toward the protective plate in the second state.

19. The staple cartridge assembly according to claim 16, wherein: The mounting seat includes a nail magazine plate and a protective plate, the nail magazine plate having a nail magazine top wall and two nail magazine side walls, the mounting position is located on the nail magazine top wall, the two nail magazine side walls are arranged on opposite sides of the nail magazine top wall and extend along the axial direction of the mounting seat, the protective plate is connected to the nail magazine side walls and is arranged opposite to the nail magazine top wall; the first end of the elastic member is connected to one of the nail magazine side walls, the second end of the elastic member contracts toward the nail magazine side wall where the first end is located in the first state, and the second end of the elastic member extends toward the nail magazine side wall away from the first end in the second state.

20. The staple cartridge assembly according to claim 14, wherein: The first end of the elastic member is connected to the cutting knife, the second end of the elastic member contracts toward the cutting knife in a first state, and the second end of the elastic member extends in a direction away from the cutting knife in a second state.

21. The staple cartridge assembly according to claim 14, wherein: The elastic member is configured as a spring or a spring.

22. The staple cartridge assembly according to claim 13, wherein: The knife stop member is rotatably arranged, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting seat, it can drive the knife stop member to rotate relative to the mounting seat, so that the knife stop member switches from the first state to the second state.

23. A surgical instrument, characterized in that: include: handle assembly; a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism; an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw; A staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife. The mounting seat has a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat, and the proximal end of the mounting seat having a firing position. a fastener having a connecting end and a free end, the connecting end of the fastener being connected to one of the staple cartridge assembly and the transmission mechanism, the other of the staple cartridge assembly and the transmission mechanism having a clamping portion; the free end of the fastener being able to move toward and away from the plane of the tissue engaging surface on the mounting seat to achieve engagement and disengagement with the clamping portion; a knife block member, the knife block member being switchable from a first state to a second state, wherein the knife block member allows the cutting knife to move from the firing position toward the distal end of the mounting seat in the first state, and the knife block member is used to prevent the cutting knife from moving to the firing position in the second state; The transmission mechanism can cooperate with the cutting knife located in the firing position. When the cutting knife is located in the firing position, the transmission mechanism is allowed to drive the cutting knife located in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.

24. A staple cartridge assembly, characterized in that: include: A mounting seat, the mounting seat having a plurality of mounting positions for mounting suture staples; A nail pushing member, the nail pushing member is movably arranged on the mounting seat, and the proximal end of the mounting seat has a firing position; A cutting knife, the cutting knife being movably arranged on the mounting seat, the nail pushing member and the cutting knife being able to move from the proximal end to the distal end of the mounting seat; a latch having a connecting end and a free end, wherein the free end of the latch is movable toward and away from the plane of the tissue engaging surface on the mounting seat to engage and disengage the engaging portion of the transmission mechanism on the surgical instrument; And a knife block member, which can be switched from a first state to a second state. In the first state, the knife block member allows the cutting knife to move from the firing position to the distal end of the mounting seat, and in the second state, the knife block member is used to prevent the cutting knife from moving to the firing position; when the cutting knife is in the firing position, the transmission mechanism of the surgical instrument is allowed to drive the cutting knife in the firing position to move from the proximal end of the mounting seat to the distal end of the mounting seat; after the cutting knife leaves the firing position, the knife block member switches from the first state to the second state.

25. A surgical instrument, characterized in that: include: handle assembly; a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism; an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw; and a staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife, the mounting seat having a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, and both the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat; The transmission mechanism is used to cooperate with the cutting knife, and the transmission mechanism can only apply a thrust from the proximal end of the mounting seat to the distal end of the mounting seat to the cutting knife in the direction of the line connecting the proximal end and the distal end of the mounting seat.

26. A surgical instrument, characterized in that: include: handle assembly; a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism; an actuator assembly, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw and capable of relative movement to achieve closing and opening; and a mounting cavity being formed between the first jaw and the second jaw; and a staple cartridge assembly, the staple cartridge assembly being configured to be disposed within the mounting cavity, the staple cartridge assembly comprising a mounting seat, a staple pusher, and a cutting knife, the mounting seat having a plurality of mounting positions for mounting staples, the staple pusher and the cutting knife being movably disposed on the mounting seat, and both the staple pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat; The transmission mechanism can move between the proximal end of the mounting seat and the distal end of the mounting seat. When the transmission mechanism moves from the proximal end of the mounting seat to the distal end of the mounting seat, the transmission mechanism cooperates with the cutting knife and drives the cutting knife to move from the proximal end of the mounting seat to the distal end of the mounting seat; when the transmission mechanism moves from the distal end of the mounting seat to the proximal end of the mounting seat, the transmission mechanism separates from the cutting knife.

Images