WO2024011915A1 - Surgical instrument and staple cartridge assembly - Google Patents

Abstract

The present application discloses a surgical instrument and a staple cartridge assembly. The surgical instrument comprises a handle assembly, a shaft assembly, a staple cartridge assembly, an actuator assembly and a blade blocking member. The staple cartridge assembly comprises a mounting seat, a staple pushing member and a cutting blade; the mounting seat is provided with a plurality of mounting positions used for mounting suturing staples; the staple pushing member and the cutting blade are both movably arranged on the mounting seat; the staple pushing member and the cutting blade can both move from the proximal end to the distal end of the mounting seat; and the proximal end of the mounting seat is provided with a firing position. The blade blocking member can be switched from a first state to a second state; in the first state, the blade blocking member allows the cutting blade to move from the firing position to the distal end of the mounting seat; and in the second state, the blade blocking member is used for preventing the cutting blade from moving to the firing position. The blade blocking member is additionally arranged; in the process that a transmission mechanism drives the cutting blade to move from the proximal end to the distal end, the blade blocking member is switched from the first state to the second state so as to prevent the cutting blade from returning to the firing position, such that the cutting blade cannot be fired again.

Description

A surgical instrument and nail cartridge assembly Technical field

This application relates to the technical field of medical devices, specifically to a surgical instrument and a nail cartridge assembly.

Background technique

At present, minimally invasive surgery occupies an important position in surgical operations, and staplers are commonly used surgical instruments in minimally invasive surgery. The working principle of the stapler is to clamp the jaws of the distal actuator at a specific position near the lesion, resect the tissue through the cutting knife of the distal actuator, and pass the staples of the distal actuator while resecting. The compartment components are sewn together.

In existing staplers, the cutting knife of the distal actuator is usually fixedly connected to the driving part. Therefore, the cutting knife cannot be replaced when the nail cartridge assembly is replaced. Repeated use of the cutting knife will reduce the sharpness of the cutting knife. This reduces the quality of surgery and brings certain medical risks. On the other hand, the remote actuator usually uses a disposable nail cartridge assembly. However, there is no safety device inside the existing nail cartridge assembly to prevent the nail cartridge assembly from being triggered a second time by the triggering device. The fired nail cartridge assembly may be triggered by a second time. Secondary firing poses serious medical risks. At the same time, existing safety devices usually require the installation of insurance clips with complex structures on the movement path of the transmission mechanism. There are many parts involved in the movement, and there are high requirements for the strength of the safety clips, which results in the reliability of the safety device. decline.

technical problem

The main purpose of the present invention is to provide a nail cartridge assembly with higher reliability and the ability to replace the cutting blade, and a surgical instrument with the nail cartridge assembly.

Technical solutions

In a first aspect, an embodiment provides a surgical instrument, including:

handle assembly;

A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

A nail cartridge assembly, which is used to be disposed in the installation cavity. The nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife. The mounting base has a plurality of mounting positions for installing suture staples. , the nail pusher and the cutting knife are movably arranged on the mounting base, the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base, and the proximal end of the mounting base has Firing position;

and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component 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 from the proximal end of the mounting base. Move to the distal end of the mounting base, and switch the blade blocking member from the first state to the second state during the movement of the cutting blade from the proximal end to the distal end.

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 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 distal end of the mounting base to the firing position.

In one embodiment, the mounting base has a tissue bonding surface, and the elastic member can contract and extend in a movable plane that is not parallel to the tissue bonding surface to achieve a state between the first state and the second state. switch between.

In one embodiment, the elastic member is connected to the mounting base.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to the protective plate member, the second end of the elastic member shrinks toward the protective plate member in the first state, and the second end of the elastic member shrinks toward the protective plate member. The end extends toward the top wall of the nail bin in the second state.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to the top wall of the nail bin, the second end of the elastic member shrinks toward the top wall of the nail bin in the first state, and the elastic member The second end extends toward the protective plate in the second state.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to one of the side walls of the nail bin, and the second end of the elastic member shrinks toward the side wall of the nail bin where the first end is located in the first state. , the second end of the elastic member extends toward the side wall of the nail bin away from the first end in the second state.

In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member shrinks toward the cutting knife in the first state, and the second end of the elastic member is in the second state and extend in a direction away from the cutting blade.

In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member shrinks toward the cutting knife in the first state, and the second end of the elastic member is in the second state, extending in a direction away from the cutting blade.

In one embodiment, the elastic member is configured as a spring or an elastic piece.

In one embodiment, the knife blocking member is rotated, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting base, it can drive the knife blocking member to rotate relative to the mounting base, so that the knife blocking member The object switches from the first state to the second state.

In one embodiment, the actuator assembly has a locking portion, and the locking portion is used to lock with the transmission mechanism to prevent the transmission mechanism from moving in the axial direction of the actuator assembly; the transmission mechanism has a first unlocking part, the cutting knife has a second unlocking part; when the cutting knife is in the firing position, the first unlocking part of the transmission mechanism can cooperate with the second unlocking part of the cutting knife, so that the The locking part and the transmission mechanism are unlocked.

In a second aspect, an embodiment provides a nail cartridge assembly, including:

A mounting base, the mounting base has a plurality of mounting positions for installing suture staples, and the proximal end of the mounting base has a firing position;

A nail pusher, which is movably arranged on the mounting base;

A cutting knife, the cutting knife is movably arranged on the mounting base, and both the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base;

and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component is used to prevent the cutting knife from moving to the firing position in the second state; 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 from the mounting base. The proximal end moves to the distal end of the mounting base, and during the movement of the cutting blade from the proximal end to the distal end, the blade blocking member is switched from the first state to the second state.

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 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 distal end of the mounting base to the firing position.

In one embodiment, the mounting base has a tissue bonding surface, and the elastic member can contract and extend in a movable plane that is not parallel to the tissue bonding surface to achieve a state between the first state and the second state. switch between.

In one embodiment, the elastic member is connected to the mounting base.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to the protective plate member, the second end of the elastic member shrinks toward the protective plate member in the first state, and the second end of the elastic member shrinks toward the protective plate member. The end extends toward the top wall of the nail bin in the second state.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to the top wall of the nail bin, the second end of the elastic member shrinks toward the top wall of the nail bin in the first state, and the elastic member The second end extends toward the protective plate in the second state.

In one embodiment, the mounting base includes a nail bin plate and a protective plate. The nail bin plate has a top wall of the nail bin and two side walls of the nail bin. The installation position is located on the top wall of the nail bin. , the two side walls of the nail bin are arranged on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the side walls of the nail bin and is connected to the side walls of the nail bin. The top walls of the nail bin are arranged oppositely; the first end of the elastic member is connected to one of the side walls of the nail bin, and the second end of the elastic member shrinks toward the side wall of the nail bin where the first end is located in the first state. , the second end of the elastic member extends toward the side wall of the nail bin away from the first end in the second state.

In one embodiment, the first end of the elastic member is connected to the cutting knife, the second end of the elastic member shrinks toward the cutting knife in the first state, and the second end of the elastic member is in the second state and extend in a direction away from the cutting blade.

In one embodiment, the elastic member is configured as a spring or an elastic piece.

In one embodiment, the knife blocking member is rotated, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting base, it can drive the knife blocking member to rotate relative to the mounting base, so that the knife blocking member The object switches from the first state to the second state.

In a third aspect, an embodiment provides a surgical instrument, including:

handle assembly;

A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

A nail cartridge assembly, which is used to be disposed in the installation cavity. The nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife. The mounting base has a plurality of mounting positions for installing suture staples. , the nail pusher and the cutting knife are movably arranged on the mounting base, the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base, and the proximal end of the mounting base has Firing position;

The buckle has a connecting end and a free end. The connecting end of the buckle is connected to one of the nail bin assembly and the transmission mechanism. The other of the nail bin assembly and the transmission mechanism has a clip. The connecting portion; the free end of the buckle can move close to and away from the plane where the tissue binding surface on the mounting base is located, so as to realize the snap connection and release of the snap connection with the snap joint portion;

The knife blocking member is capable of switching from a first state to a second state. In the first state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base. The knife blocking member In the second state, it is used to prevent the cutting knife from moving to the firing position;

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 from the proximal end of the mounting base. Move to the far end of the mounting base; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.

In a fourth aspect, an embodiment provides a nail cartridge assembly, including:

A mounting base, the mounting base has a plurality of mounting positions for installing suture staples;

A nail pusher, which is movably arranged on the mounting base, and the proximal end of the mounting base has a firing position;

A cutting knife, the cutting knife is movably arranged on the mounting base, and both the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base;

The buckle has a connecting end and a free end. The free end of the buckle can move close to and away from the plane where the tissue joint surface on the mounting base is located, so as to realize the connection with the transmission mechanism on the surgical instrument. The clamping and releasing of the clamping part;

and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component is used to prevent the cutting knife from moving to the firing position in the second state; 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 from the mounting base. The proximal end moves to the distal end of the mounting base; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.

In a fifth aspect, an embodiment provides a surgical instrument, including:

handle assembly;

A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

And a nail cartridge assembly, the nail cartridge assembly is used to be arranged in the installation cavity, the nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife, the mounting base has a plurality of mounting holes for installing suture staples. position, the nail pusher and the cutting knife are movably arranged on the mounting base, and the nail pusher and the cutting knife can move from the proximal end to the distal end of the mounting base;

The transmission mechanism is used to cooperate with the cutting blade, and the transmission mechanism can only exert force on the cutting blade from the proximal end of the mounting base to the distal end of the mounting base in the direction of the line connecting the proximal end and the distal end of the mounting base. thrust.

In a sixth aspect, an embodiment provides a surgical instrument, including:

handle assembly;

A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

And a nail cartridge assembly, the nail cartridge assembly is used to be arranged in the installation cavity, the nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife, the mounting base has a plurality of mounting holes for installing suture staples. position, the nail pusher and the cutting knife are movably arranged on the mounting base, and the nail pusher and the cutting knife can move from the proximal end to the distal end of the mounting base;

The transmission mechanism can move between the proximal end of the mounting base and the distal end of the mounting base. When the transmission mechanism moves from the proximal end of the mounting base to the distal end of the mounting base, the transmission mechanism cooperates with the cutting blade, and The cutting blade is driven to move from the proximal end of the mounting base to the distal end of the mounting base; when the transmission mechanism moves from the distal end of the mounting base to the proximal end of the mounting base, the transmission mechanism is separated from the cutting blade.

beneficial effects

According to the surgical instrument and staple cartridge assembly of the above embodiment, the surgical instrument includes a handle assembly, a barrel assembly, a staple cartridge assembly, an actuator assembly and a knife blocking member. 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. The actuator assembly includes a first jaw and a second jaw. The first jaw and the second jaw are movably connected. The first jaw and the second jaw can move relative to each other. to achieve closing and opening. An installation cavity is formed between the first jaw and the second jaw. The nail cartridge assembly is used to be arranged in the installation cavity. The nail cartridge assembly includes a mounting base, a nail pushing piece and a cutting knife. The mounting base has multiple mounting positions for installing suture staples. The nail pushing piece and the cutting knife are both movably set in the installation cavity. On the base, both the pusher member and the cutting knife can move from the proximal end of the mounting base to the distal end, and the proximal end of the mounting base has a firing position. The knife blocking member can be switched from a first state to a second state. In the first state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base. In the second state, the knife blocking member is used to prevent the cutting knife. Move to firing position. The transmission mechanism can cooperate with the cutting knife in the firing position. When the cutting knife is in the firing position, the transmission mechanism is allowed to drive the cutting knife in the firing position to move from the proximal end of the mounting base to the far end of the mounting base, and when the cutting knife is in the firing position During the movement from the proximal end to the distal end, the blade blocking member is switched from the first state to the second state. On the one hand, due to the addition of the knife blocking member, when the transmission mechanism drives the cutting knife to move from the proximal end to the distal end, the knife blocking member switches from the first state to the second state to prevent the cutting knife from returning to the firing position. This makes the cutting knife unable to be fired a second time. Compared with the traditional safety device, there is no need to use a complex insurance clip to prevent the movement of the transmission mechanism. The function of preventing the cutting knife from being fired a second time can be realized only by using the knife block to prevent the cutting knife from returning to the firing position. Fewer moving parts improve the reliability of the surgical instrument and cartridge assembly. On the other hand, when replacing the nail cartridge assembly, the cutting knife in the nail cartridge assembly can be replaced simultaneously to avoid a reduction in the sharpness of the cutting knife caused by repeated use, thus helping to improve the quality of surgery.

Description of drawings

Figure 1 is a schematic structural diagram of a surgical instrument in an embodiment of the present application;

Figure 2 is a schematic structural diagram of the actuator assembly, nail cartridge assembly and transmission mechanism in one embodiment of the present application;

Figure 3 is a cross-sectional view of the actuator assembly, nail cartridge assembly and transmission mechanism in one embodiment of the present application;

Figure 4 is an enlarged view of position A in Figure 3 of the present application;

Figure 5 is a schematic structural diagram of the nail cartridge assembly in an embodiment of the present application;

Figure 6 is an exploded view of the nail cartridge assembly in one embodiment of the present application;

Figure 7 is a cross-sectional view of the proximal end of the staple cartridge assembly in the first state of the knife blocking member in one embodiment of the present application;

Figure 8 is a cross-sectional view of the proximal end of the staple cartridge assembly in the second state of the knife blocking member in one embodiment of the present application;

Figure 9 is a schematic structural diagram of the nail cartridge assembly in the first state of the knife blocking member in the second embodiment of the present application;

Figure 10 is a schematic structural diagram of the nail cartridge assembly in the second state of the knife blocking member in the second embodiment of the present application;

Figure 11 is a schematic structural diagram of the protective plate and the blade blocking member in the second embodiment of the present application;

Figure 12 is a cross-sectional view of the actuator assembly and the proximal end of the staple cartridge assembly in the first state of the blade blocking member in the third embodiment of the present application;

Figure 13 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly in the second state of the knife blocking member in the third embodiment of the present application;

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

Figure 15 is a cross-sectional view of the actuator assembly and the proximal end of the staple cartridge assembly in the second state of the blade blocking member in the fourth embodiment of the present application;

Figure 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 in the fifth embodiment of the present application;

Figure 17 is a cross-sectional view of the proximal end of the actuator assembly and the nail cartridge assembly when the cutting blade is fired and contacts the blade blocking member in the fifth embodiment of the present application;

Figure 18 is a cross-sectional view of the proximal end of the actuator assembly and the staple cartridge assembly when the cutting blade pushes the blade blocking member to switch to the second state in the fifth embodiment of the present application;

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

Figure 20 is a schematic structural diagram of a cutting blade and a nail pusher that does not include a fastener in the sixth embodiment of the present application;

Figure 21 is a schematic structural diagram 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;

Figure 22 is a schematic structural diagram of the transmission mechanism and the cutting knife in the firing position in the sixth embodiment of the present application when they are fully matched;

Figure 23 is a schematic structural diagram of the transmission mechanism retracting and separating from the fired cutting knife in the sixth embodiment of the present application;

Reference signs: 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 , accommodation groove; 320, second jaw; 330, locking part; 400, nail bin assembly; 410, mounting seat; 411, tissue joint surface; 412, nail bin plate; 4121, nail bin top wall; 4122, nail Chamber side wall; 413, protective plate; 414, knife blocking groove; 420, nail pusher; 430, cutting knife; 431, second unlocking part; 500, knife blocking piece; 510, elastic member; 520, knife blocking Protrusion; 600, snap fastener; 700, snap joint.

Embodiments of the invention

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments use associated similar element numbers. In the following embodiments, many details are described in order to make the present application better understood. However, those skilled in the art can readily recognize that some of the features may be omitted in different situations, or may be replaced by other elements, materials, and 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 part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is difficult to describe these in detail. The relevant operations are not necessary, and they can fully understand the relevant operations based on the descriptions in the instructions and general technical knowledge in the field.

Additionally, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, each step or action in the method description can also be sequentially exchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the description and drawings are only for clearly describing a certain embodiment, and do not imply a necessary sequence, unless otherwise stated that a certain sequence must be followed.

The serial numbers assigned to components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "connection" mentioned in this application include direct and indirect connections (connections) unless otherwise specified.

The stapler is a commonly used surgical instrument in minimally invasive surgery. Please refer to Figure 1. The stapler usually 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.

When operating the stapler, the operator can hold the fixed handle 110 and extend the actuator assembly 300 into the lesion site in the human body through the slender barrel assembly 200. The trigger 120 is then used to trigger the closed transmission chain, so that the jaws of the actuator assembly 300 are closed and clamped at a specific position near the lesion. Then, the trigger 120 is used to trigger the firing transmission chain, so that the cutting knife 430 in the actuator assembly 300 can cut off the tissue, and at the same time, the tissue can be sutured through the suture staples in the actuator assembly 300. In other embodiments, the operation mode of closing and firing may have other solutions, for example, two triggers 120 are operated respectively to perform closing and firing; or, an electric closing and firing solution.

In this embodiment, the “distal end” refers to the end far away from the operator when operating the surgical instrument, and the “proximal end” refers to the end close to the operator when operating the surgical instrument. In this embodiment, "axial direction" refers to the direction of the line connecting the center of the distal end and the center of the proximal end, and "radial direction" refers to the direction perpendicular to the axial direction.

Please refer to Figures 1-23. This embodiment provides a surgical instrument.

The surgical instrument includes a handle assembly 100, a barrel assembly 200, a nail cartridge assembly 400, an actuator assembly 300 and a knife blocking member 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. 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. The first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening. An installation cavity is formed between the first jaw 310 and the second jaw 320 . The nail cartridge assembly 400 is used to be arranged in the installation cavity. The nail cartridge assembly 400 includes a mounting base 410, a nail pusher 420 and a cutting knife 430. The mounting base 410 has a plurality of installation positions for installing suture staples. The nail pusher 420 and The cutting blades 430 are movably arranged on the mounting base 410. The nail pushing member 420 and the cutting blade 430 can both 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 knife blocking member 500 can switch from a first state to a second state. In the first state, the knife blocking member 500 allows the cutting knife 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the knife blocking member 500 allows Used to prevent the cutting knife 430 from moving to the firing position. The transmission mechanism 210 can cooperate with the cutting knife 430 in the firing position. When the cutting knife 430 is in the firing position, the transmission mechanism 210 is allowed to drive the cutting knife 430 in the firing position to move from the proximal end of the mounting base 410 to the mounting base 410. distal end, and during the movement of the cutting blade 430 from the proximal end to the distal end, the blade blocking member 500 is switched from the first state to the second state.

On the one hand, due to the addition of the knife blocking member 500, when the transmission mechanism 210 drives the cutting knife 430 to move from the proximal end to the distal end, the knife blocking member 500 switches from the first state to the second state to prevent the cutting knife 430 from moving. Return to the firing position so that the cutting knife 430 cannot be fired a second time. Compared with the traditional safety device, there is no need to prevent the movement of the transmission mechanism 210 through a complex insurance clip. Only the knife block 500 prevents the cutting knife 430 from returning to the firing position, thereby preventing the cutting knife 430 from being fired a second time. function, fewer parts are involved in movement, thereby improving the reliability of the surgical instrument and staple cartridge assembly 400 . On the other hand, when the nail cartridge assembly 400 is replaced, the cutting knife 430 in the nail cartridge assembly 400 can be replaced simultaneously to avoid the reduction of the sharpness of the cutting knife 430 caused by repeated use, thereby improving the quality of surgery.

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 cartridge assembly 400 , that is, when the surgical instrument includes the cartridge assembly 400 , the cartridge assembly 400 is considered part of the surgical instrument. When the surgical instrument does not include the staple cartridge assembly 400, the staple cartridge assembly 400 is regarded as an accessory or consumable of the surgical instrument.

On the other hand, this embodiment also provides a nail cartridge assembly 400.

Please refer to Figures 2-8. The nail cartridge assembly 400 includes a mounting base 410, a nail pushing member 420, a cutting blade 430 and a blade blocking member 500.

The mounting base 410 has a plurality of mounting positions for installing staples, and the proximal end of the mounting base 410 has a firing position. The nail pusher 420 is movably mounted on the mounting base 410 . The cutting knife 430 is movably arranged on the mounting base 410, and both the nail pusher 420 and the cutting knife 430 can move from the proximal end to the distal end of the mounting base 410. The knife blocking member 500 can switch from a first state to a second state. In the first state, the knife blocking member 500 allows the cutting knife 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the knife blocking member 500 allows Used to prevent the cutting knife 430 from moving to the firing position. When the cutting knife 430 is in the firing position, the transmission mechanism 210 of the surgical instrument is allowed to drive the cutting knife 430 in the firing position from the proximal end of the mounting base 410 to the distal end of the mounting base 410, and when the cutting knife 430 moves from the proximal end During the movement toward the distal end, the blade blocking member 500 is switched from the first state to the second state.

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 be pressed by the cutting knife 430 or the nail pushing member 420. After contracting to the first state and the transmission structure firing the cutting knife 430, the elastic member 510 can extend to the second state under its own elastic force to prevent the cutting knife 430 from moving from the distal end of the mounting base 410 to the firing position.

When the elastic member 510 is selected as the knife blocking member 500, the elastic member 510 can be switched between the first state and the second state through contraction of the elastic member 510 under the action of external force and expansion under the action of its own elastic force. Specifically, in an actual application scenario, after the transmission mechanism 210 fires the cutting knife 430, the cutting knife 430 or the push pin member 420 releases the pressure on the knife blocking member 500 due to its own displacement, so that the knife blocking member 500 can elastically Automatically switches from the first state to the second state under the action of force, making full use of the elastic force of the knife blocking member 500 itself to reduce the operating steps required for the knife blocking member 500 to switch states.

It should be noted that the meaning of the first state and the second state of the knife blocking member 500 is not limited to the extended state and the contracted state of the elastic member 510. In other implementations, the knife blocking member 500 may not be the elastic member 510, but may be movable. The rigid component is provided to define the first state and the second state of the blade blocking member 500 by driving the rigid component to move to different positions or postures.

Please refer to Figures 5-8. In one embodiment, the mounting base 410 has a tissue binding surface 411, and the elastic member 510 can contract and extend in an active plane that is not parallel to the tissue binding surface 411 to achieve the first state and Switch between the second state.

Since the active 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, the cutting knife 430 and the push pin member 420 in the direction perpendicular to the tissue bonding surface 411 when contracting and extending. Then, the elastic member 510 is switched between a first state that allows the cutting knife 430 to return to the firing position and a second state that prevents the cutting knife 430 from returning to the firing position.

It should be noted that the tissue binding surface 411 of the mounting base 410 refers to the surface of the mounting base 410 that contacts the clamped tissue when clamping tissue. It can be understood that when suturing tissue, the suture staples are pushed out from the tissue binding surface 411 of the mounting base 410 to achieve suturing of the tissue.

Please refer to FIGS. 5-8 . In one embodiment, the movement plane of the elastic member 510 is perpendicular to the tissue combining surface 411 .

When the elastic member 510 is perpendicular to the tissue bonding 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 may also be at 30°, 60°, or other suitable angles with the tissue combining surface 411 .

Please refer to Figures 5-11. In one embodiment, the elastic member 510 is connected to the mounting base 410.

Since the elastic member 510 is connected to the mounting base 410, when the operator installs and disassembles the mounting base 410 from the actuator assembly 300, the elastic member 510 can be installed and disassembled at the same time, which is beneficial to reducing the load of the actuator assembly 300. Structural complexity and reduction of disassembly and assembly steps for operators.

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

For example, please refer to Figures 5-8. In the first connection scheme, the elastic member 510 is connected to the top of the mounting base 410. The mounting base 410 includes a nail bin plate 412 and a protective plate 413. The nail bin plate 412 has a nail bin. The installation position is located on the top wall 4121 of the nail bin 4121 and the two side walls 4122 of the nail bin. The two side walls 4122 are provided on opposite sides of the top wall 4121 of the nail bin and extend along the axial direction of the mounting base 410 , the protective plate 413 is connected to the side wall 4122 of the nail bin, and is opposite to the top wall 4121 of the nail bin. The first end of the elastic member 510 is connected to the top wall 4121 of the nail bin. The second end of the elastic member 510 contracts toward the top wall 4121 of the nail bin in the first state. The second end of the elastic member 510 contracts toward the protective plate in the second state. Piece 413 stretches.

When the cutting knife 430 is in the firing position, the second end of the elastic member 510 contracts toward the top wall 4121 of the nail bin under the pressure of the cutting knife 430 or the nail pushing member 420, so that the elastic member 510 switches to the first state. When the cutting knife 430 is fired, the second end of the elastic member 510 stretches toward the protection plate 413 under the action of its own elastic force, so that the elastic member 510 switches 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 piece.

For another example, please refer to Figures 9-11. In the second connection scheme, the elastic member 510 is connected to the bottom of the mounting base 410. The mounting base 410 includes a nail bin plate 412 and a protection plate 413. The nail bin plate 412 has The top wall 4121 of the nail bin and the bottom of the two nail bins are installed at the top wall 4121 of the nail bin. The two side walls 4122 are provided on opposite sides of the top wall 4121 of the nail bin and extend along the axial direction of the mounting base 410. The protective plate 413 is connected to the side wall 4122 of the nail cartridge and is opposite to the top wall 4121 of the nail cartridge. The first end of the elastic member 510 is connected to the protective plate member 413. The second end of the elastic member 510 contracts toward the protective plate member 413 in the first state. The second end of the elastic member 510 contracts toward the top wall of the nail bin in the second state. 4121Stretch.

When the cutting knife 430 is in the firing position, the second end of the elastic member 510 contracts toward the protection plate 413 under the pressure of the cutting knife 430 or the pusher member 420, so that the elastic member 510 switches to the first state. When the cutting knife 430 is fired, the second end of the elastic member 510 stretches toward the top wall 4121 of the nail bin under its own elastic force, causing the elastic member 510 to switch to the second state. Specifically, in this implementation, the elastic member 510 is an elastic piece, and elastic pieces are provided on opposite sides of the proximal end of the protection plate.

For example, in the third connection solution, the elastic member 510 is connected to the side of the mounting base 410. The mounting base 410 includes a nail bin plate 412 and a protective plate 413. The nail bin plate 412 has a nail bin top wall 4121 and a protective plate 413. The two nail bin side walls 4122 are installed on the nail bin top wall 4121. The two nail bin side walls 4122 are provided on opposite sides of the nail bin top wall 4121 and extend along the axial direction of the mounting base 410 to protect the plate 413. It is connected to the side wall 4122 of the nail bin and is opposite to the top wall 4121 of the nail bin. The first end of the elastic member 510 is connected to a nail bin side wall 4122. The second end of the elastic member 510 contracts toward the nail bin side wall 4122 where the first end is located in the first state. In the second state, it extends toward the side wall 4122 of the nail bin away from the first end.

When the cutting knife 430 is in the firing position, the second end of the elastic member 510 contracts toward the side wall 4122 of the nail bin where the first end is located under the pressure of the cutting knife 430 or the nail pushing member 420, so that the elastic member 510 switches to the second position. One state. When the cutting knife 430 is fired, the second end of the elastic member 510 stretches toward the side wall 4122 of the nail bin away from the first end under the action of its own elastic force, so that the elastic member 510 switches to the second state.

Specifically, the connection method between the elastic member 510 and the nail bin top wall 4121, the nail bin side wall 4122 or the protective plate 413 of the mounting base 410 can be bonding, snapping, welding, threaded connection or other suitable connection methods. . The elastic member 510 can be a spring, a spring piece, an elastic block or other suitable elastic structures.

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 or the nail pushing member 420, etc.

For example, please refer to Figures 12 and 13. In one embodiment, the first end of the elastic member 510 is connected to the cutting knife 430, and the second end of the elastic member 510 contracts toward the cutting knife 430 in the first state. The elastic member 510 The second end extends in the direction away from the cutting blade 430 in the second state.

When the cutting knife 430 is in the firing position, the second end of the elastic member 510 contracts toward the cutting knife 430 under the action of the extrusion force, so that the elastic member 510 switches to the first state. When the cutting knife 430 is fired, the second end of the elastic member 510 stretches in a direction away from the cutting knife 430 under the action of its own elastic force, so that the elastic member 510 switches to the second state. Specifically, when the cutting knife 430 is in the firing position, the elastic member 510 may maintain the first state under the extrusion force of the inner wall of the mounting base 410, or may be in the first state under the extrusion force of the actuator assembly 300 or other components. maintain the first state under the influence of

For another example, please refer 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 In the first state, it contracts toward the first jaw 310 or the second jaw 320 where the first end is located, and the second end of the elastic member 510 extends toward the mounting base 410 in the second state.

When the cutting knife 430 is in the firing position, the second end of the elastic member 510 moves toward the first jaw 310 or the second jaw 320 where the first end is located under the extrusion force of the cutting knife 430 or the pusher 420 . Contraction causes the elastic member 510 to switch to the first state. When the cutting knife 430 is fired, the second end of the elastic member 510 stretches toward the mounting base 410 under the action of its own elastic force, so that the elastic member 510 switches to the second state.

Specifically, please refer to Figures 14 and 15. The first jaw 310 has a receiving groove 311, and the elastic member 510 is disposed in the receiving groove 311. Please refer to Figure 14, when the cutting knife 430 is in the firing position, the elastic member 510 is in the firing position. The push pin component 420 contracts under the pressure and is received in the receiving groove 311 to maintain the first state. Please refer to Figure 15. When the cutting knife 430 is fired, the elastic member 510 stretches out of the receiving groove 311 under the action of its own elastic force to switch to the second state. Of course, in other embodiments, the elastic member 510 can also be connected to the second jaw 320 .

It should be noted that the elastic member 510 used for the knife blocking member 500 has the advantages of simple structure and automatic switching of states through its own elastic force, but it does not mean that only the elastic member 510 can be used for the knife blocking member 500 . In other embodiments, the knife blocking member 500 may not be the elastic member 510 , but may be a movable rigid member. By driving the rigid member to move to different positions or postures, the knife blocking member 500 can be in the first state and the second state. Switch between states.

For example, please refer to Figures 16-19. In one embodiment, the knife blocking member 500 is rotated, and when the transmission mechanism 210 drives the cutting knife 430 to move from the firing position to the far end of the mounting base 410, it can drive the knife blocking member 500. The relative mounting base 410 is rotated to switch the knife blocking member 500 from the first state to the second state, and the state switching is realized by the rotation of the knife blocking member 500 .

Please refer to Figures 16-19. In one embodiment, the knife blocking member 500 is provided with a knife blocking protrusion 520 at one end thereof, and the mounting base 410 is provided with a knife blocking groove 414 that cooperates with the knife blocking protrusion 520. When the cutting knife 430 is fired, the part of the cutting knife 430 that is in contact with the knife blocking member 500 drives the knife blocking member 500 to rotate relative to the mounting base 410, so that the knife blocking protrusion 520 engages with the knife blocking groove 414, thereby passing through the knife blocking member. The other end of 500 prevents the cutting knife 430 from retreating to the firing position. In other embodiments, the cooperation method between the knife blocking member 500 and the mounting base 410 is not limited to snap-fitting. For example, the knife blocking member 500 may also be magnetically coupled or bonded with the mounting base 410 .

Of course, in other embodiments, the rigid member is not limited to a rotational arrangement. For example, the rigid member may also be slidingly disposed along an inclined ramp, and the sliding displacement of the rigid member on the ramp allows and prevents the cutting blade 430 from retreating to a position where it can The status of the firing position.

Please refer to FIGS. 2-4 . In one embodiment, the actuator assembly 300 has a locking portion 330 . The locking portion 330 is used to lock with the transmission mechanism 210 to prevent the transmission mechanism 210 from moving in the axial direction of the actuator assembly 300 . The transmission mechanism 210 has a first unlocking part 211 , and the cutting blade 430 has a second unlocking part 431 . When the cutting knife 430 is in the firing position, the first unlocking portion 211 of the transmission mechanism 210 can cooperate with the second unlocking portion 431 of the cutting knife 430 to unlock the locking portion 330 and the transmission mechanism 210 .

On the one hand, when the locking portion 330 on the actuator assembly 300 is used to lock the transmission mechanism 210, compared with traditional technical solutions, the safety function can be achieved by only adding features to existing parts without increasing structural complexity. The unique insurance clip and spring-driven structure help improve the reliability of the insurance function and avoid the risk of the insurance clip falling into the human body after failure. On the other hand, when the cutting knife 430 is in the firing position, the first unlocking part 211 on the transmission mechanism 210 and the second unlocking part 431 on the nail cartridge assembly 400 are used to unlock the transmission mechanism 210 to ensure that it is in the firing position. The cutting knife 430 can be fired by the transmission mechanism 210.

It can be understood that the time when the knife blocking member 500 switches from the first state to the second state is not 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 blocking knife It is sufficient that the component 500 can switch from the first state to the second state.

For example, please refer to Figures 1-8. This embodiment also provides a surgical instrument.

Please refer to Figures 1-8. The surgical instrument includes a handle assembly 100, a barrel assembly 200, an actuator assembly 300, a nail cartridge assembly 400, a buckle 600 and a knife block 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. 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. The first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening. An installation cavity is formed between the first jaw 310 and the second jaw 320 . The nail cartridge assembly 400 is used to be arranged in the installation cavity. The nail cartridge assembly 400 includes a mounting base 410, a nail pusher 420 and a cutting knife 430. The mounting base 410 has a plurality of installation positions for installing suture staples. The nail pusher 420 and The cutting blades 430 are movably arranged on the mounting base 410. The nail pushing member 420 and the cutting blade 430 can both 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 buckle part 600 has a connecting end and a free end. The connecting end of the buckle part 600 is connected to one of the nail cartridge assembly 400 and the transmission mechanism 210 . The other of the nail cartridge assembly 400 and the transmission mechanism 210 has a clipping part 700 . The free end of the buckle part 600 can move closer to and away from the plane where the tissue combining surface 411 on the mounting base 410 is located, so as to realize the buckling and unlocking with the buckling part 700 .

The knife blocking member 500 can switch from a first state to a second state. In the first state, the knife blocking member 500 allows the cutting knife 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the knife blocking member 500 allows Used to prevent the cutting knife 430 from moving to the firing position. The transmission mechanism 210 can cooperate with the cutting knife 430 in the firing position. When the cutting knife 430 is in the firing position, the transmission mechanism 210 is allowed to drive the cutting knife 430 in the firing position to move from the proximal end of the mounting base 410 to the mounting base 410. remote. After the cutting knife 430 leaves the firing position, the knife blocking member 500 switches from the first state to the second state.

On the one hand, due to the addition of the buckle part 600 and the buckle part 700, the buckle part 600 can be moved to a plane close to the tissue binding surface 411 on the mounting base 410 to realize the buckle connection with the buckle part 700. Then, the snap fit between the nail cartridge assembly 400 and the transmission mechanism 210 is achieved. By moving the buckle 600 toward a plane away from the tissue binding surface 411 on the mounting base 410, the buckle 600 is released from the locking portion 700, and then the nail cartridge assembly 400 is released from the transmission mechanism 210. It is beneficial to improve the reliability of the combination and separation between the nail cartridge assembly 400 and the transmission mechanism 210. On the other hand, the timing when the blade blocking member 500 switches from the first state to the second state is not limited to the process of the cutting blade 430 moving from the proximal end to the distal end. For example, the timing when the status of the knife blocking member 500 changes can also be during cutting. When the knife 430 moves from the distal end to the proximal end and does not reach the firing position, it is only necessary to ensure that the cutting knife 430 leaves the firing position when the state of the knife blocking member 500 changes. This is not only conducive to increasing the flexibility in selecting the timing of the state change of the cutter retaining member 500, but also is conducive to expanding the number of implementable solutions for the specific structure of the cutter retaining member 500.

Based on the above-mentioned surgical instrument with the buckle 600 and the buckle part 700, please refer to Figures 1-8. This embodiment also provides a staple cartridge assembly 400.

Please refer to FIGS. 1-8 . The nail cartridge assembly 400 includes a mounting base 410 , a nail pusher 420 , a cutting knife 430 , a buckle 600 and a knife blocking member 500 .

The mounting base 410 has a plurality of mounting positions for mounting staples. The nail pushing member 420 is movably arranged on the mounting base 410, and the proximal end of the mounting base 410 has a firing position. The cutting knife 430 is movably arranged on the mounting base 410, and both the nail pusher 420 and the cutting knife 430 can move from the proximal end to the distal end of the mounting base 410. The buckle 600 has a connecting end and a free end. The free end of the buckle 600 can move close to and away from the plane where the tissue binding surface 411 on the mounting base 410 is located, so as to realize the buckle with the transmission mechanism 210 on the surgical instrument. 700 card connection and release card connection.

The knife blocking member 500 can switch from a first state to a second state. In the first state, the knife blocking member 500 allows the cutting knife 430 to move from the firing position to the distal end of the mounting base 410. In the second state, the knife blocking member 500 allows Used to prevent the cutting knife 430 from moving to the firing position. When the cutting knife 430 is in the firing position, the transmission mechanism 210 of the surgical instrument is allowed to drive the cutting knife 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 knife 430 leaves the firing position, the knife blocking member 500 switches from the first state to the second state.

It can be understood that in some embodiments, the cutting knife 430 can also be prevented from being fired a second time by making it impossible to retreat after the cutting knife 430 leaves the firing position.

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

Please refer to Figures 20-23. The surgical instrument includes a handle assembly 100, a barrel assembly 200, an actuator assembly 300 and a staple cartridge assembly 400.

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. 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. The first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening. An installation cavity is formed between the first jaw 310 and the second jaw 320 .

The nail cartridge assembly 400 is used to be arranged in the installation cavity. The nail cartridge assembly 400 includes a mounting base 410, a nail pusher 420 and a cutting knife 430. The mounting base 410 has a plurality of installation positions for installing suture staples. The nail pusher 420 and The cutting blade 430 is movably mounted on the mounting base 410 , and both the nail pusher 420 and the cutting blade 430 can move from the proximal end to the distal end of the mounting base 410 . The transmission mechanism 210 is used to cooperate with the cutting blade 430, and the transmission mechanism 210 can only exert a force on the cutting blade 430 from the proximal end of the mounting base 410 to the distal end of the mounting base 410 in the direction of the line connecting the proximal end and the distal end of the mounting base 410. end thrust.

Since the transmission mechanism 210 can only apply a thrust force from the proximal end of the installation base 410 to the distal end of the installation base 410 to the cutting blade 430 in the direction connecting the proximal end and the distal end of the installation base 410, the transmission mechanism 210 can only drive The cutting blade 430 moves from the proximal end of the mounting base 410 to the distal end of the mounting base 410, but cannot drive the cutting blade 430 to move from the distal end of the mounting base 410 to the proximal end, so that the cutting blade 430 cannot retreat to the firing position, thus This prevents the transmission mechanism 210 from firing the cutting knife 430 a second time.

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

Please refer to Figures 20-23. The surgical instrument includes a handle assembly 100, a barrel assembly 200, an actuator assembly 300 and a staple cartridge assembly 400.

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. 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. The first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening. An installation cavity is formed between the first jaw 310 and the second jaw 320 . The nail cartridge assembly 400 is used to be arranged in the installation cavity. The nail cartridge assembly 400 includes a mounting base 410, a nail pusher 420 and a cutting knife 430. The mounting base 410 has a plurality of installation positions for installing suture staples. The nail pusher 420 and The cutting blade 430 is movably mounted on the mounting base 410 , and both the nail pusher 420 and the cutting blade 430 can move from the proximal end to the distal end of the mounting base 410 .

The transmission mechanism 210 can move between the proximal end of the mounting base 410 and the distal end of the mounting base 410. When the transmission mechanism 210 moves from the proximal end of the mounting base 410 to the distal end of the mounting base 410, the transmission mechanism 210 cooperates with the cutting blade 430. , and drive the cutting knife 430 to move from the proximal end of the mounting base 410 to the distal end of the mounting base 410 . When the transmission mechanism 210 moves from the distal end of the mounting base 410 to the proximal end of the mounting base 410, the transmission mechanism 210 is separated from the cutting blade 430.

The transmission mechanism 210 can only drive the cutting blade 430 to move from the proximal end of the mounting base 410 to the distal end of the mounting base 410. When the transmission mechanism 210 moves toward the proximal end of the mounting base 410, the transmission mechanism 210 is separated from the cutting blade 430. The cutting blade 430 cannot be driven to move toward the proximal end of the mounting base 410 .

Please refer to Figures 20-23. It can be understood that the above two solutions of limiting the force direction of the transmission mechanism 210 to the cutting knife 430 and limiting the timing of cooperation and separation between the transmission mechanism 210 and the cutting knife 430 can be used alone or in combination.

For example, please refer to Figures 20-23. When the above two solutions are used in combination, the transmission mechanism 210 has a first unlocking part 211, and the cutting knife 430 has a second unlocking part 431. Comparing with Figures 4-8, it can be seen that the buckle 600 and the buckle portion 700 in Figure 4-8 are not provided between the transmission mechanism 210 and the cutting knife 430. When the transmission mechanism 210 moves from the proximal end of the mounting base 410 to the distal end of the mounting base 410, the first unlocking part 211 cooperates with the second unlocking part 431, and the transmission mechanism 210 exerts a force on the cutting blade 430 from the proximal end of the mounting base 410. The pushing force of the distal end of the mounting base 410 drives the cutting blade 430 to move from the proximal end of the mounting base 410 to the distal end of the mounting base 410 . When the transmission mechanism 210 moves from the distal end of the mounting base 410 to the proximal end of the mounting base 410 , the first unlocking part 211 and the second unlocking part 431 are separated, and the transmission mechanism 210 cannot exert force on the cutting blade 430 from the distal end of the mounting base 410 . The pulling force toward the proximal end of the mounting base 410 prevents the cutting blade 430 from retreating to the firing position.

It should be noted that the timing of separation of the transmission mechanism 210 and the cutting blade 430 may be directly when the transmission mechanism 210 moves toward the proximal end of the mounting base 410 , or the transmission mechanism 210 may drive the cutting blade 430 toward the proximal end of the mounting base 410 After moving for a certain distance, it is separated from the cutting knife 430, as long as it is ensured that the cutting knife 430 does not move to the firing position. For example, the transmission mechanism 210 and the cutting blade 430 are connected through a pull-back protrusion mechanism and a pull-back groove. The pull-back protrusion structure is made of a material that is prone to deformation. When the transmission mechanism 210 moves toward the proximal end of the mounting base 410 At this time, the pull-back protruding mechanism engages with the pull-back groove to drive the cutting blade 430 to move a certain distance toward the proximal end of the mounting base 410 . And because the pull-back protrusion gradually deforms during the movement toward the proximal end of the mounting base 410, the pull-back protrusion and the pull-back groove are eventually separated, so that the cutting knife 430 cannot continue to move to the firing position.

The above specific 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. For those skilled in the technical field to which the present invention belongs, several simple deductions, modifications or substitutions can be made based on the ideas of the present invention.

Claims (26)

1. A surgical instrument, which is characterized in that it includes:

   handle assembly;

   A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

   an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

   A nail cartridge assembly, which is used to be disposed in the installation cavity. The nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife. The mounting base has a plurality of mounting positions for installing suture staples. , the nail pusher and the cutting knife are movably arranged on the mounting base, the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base, and the proximal end of the mounting base has Firing position;

   and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component 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 from the proximal end of the mounting base. Move to the distal end of the mounting base, and switch the blade blocking member from the first state to the second state during the movement of the cutting blade from the proximal end to the distal end.
2. The surgical instrument according to claim 1, wherein the knife blocking member is configured as an elastic member, and when the cutting knife is in the firing position, the elastic member can be pressed by the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can stretch 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 base to the firing position. sports.
3. The surgical instrument according to claim 2, wherein the mounting base has a tissue bonding surface, and the elastic member can contract and extend in a movable plane that is not parallel to the tissue bonding surface to achieve the desired position. Switch 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 base.
5. The surgical instrument according to claim 3, wherein the mounting base includes a nail bin plate and a protective plate, the nail bin plate has a top wall of the nail bin and two side walls of the nail bin, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to the protective plate member, and the second end of the elastic member moves toward the protective plate member in the first state. Contraction, the second end of the elastic member extends toward the top wall of the nail bin in the second state.
6. The surgical instrument according to claim 3, wherein the mounting base includes a nail bin plate and a protective plate, the nail bin plate has a top wall of the nail bin and two side walls of the nail bin, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to the top wall of the nail bin, and the second end of the elastic member moves toward the nail bin in the first state. The top wall contracts, and the second end of the elastic member extends toward the protective plate member in the second state.
7. The surgical instrument according to claim 3, wherein the mounting base includes a nail bin plate and a protective plate, the nail bin plate has a top wall of the nail bin and two side walls of the nail bin, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to one of the side walls of the nail bin, and the second end of the elastic member moves toward the third nail bin in the first state. The side wall of the nail bin where one end is located shrinks, and the second end of the elastic member extends toward the side wall of the nail bin 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, and the second end of the elastic member shrinks toward the cutting knife in the first state, and the The second end of the elastic member extends in a direction away from the cutting knife in the 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, and the second end of the elastic member is at In the first state, it shrinks toward the first jaw or the second jaw where the first end is located, and in the second state, the second end of the elastic member extends toward the mounting base.
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 blocking member is rotated, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting base, it can drive the knife blocking member. Rotate relative to the mounting base to switch the knife blocking member from the first state to the second state.
12. The surgical instrument according to any one of claims 1-11, wherein the actuator assembly has a locking portion, the locking portion is used to lock with the transmission mechanism to prevent the transmission mechanism from moving along the desired direction. The axial movement of the actuator assembly; the transmission mechanism has a first unlocking part, and the cutting knife has a second unlocking part; when the cutting knife is in the firing position, the first unlocking part of the transmission mechanism It can cooperate with the second unlocking part of the cutting blade to unlock the locking part and the transmission mechanism.
13. A nail cartridge assembly, which is characterized by including:

    A mounting base, the mounting base has a plurality of mounting positions for installing suture staples, and the proximal end of the mounting base has a firing position;

    A nail pusher, which is movably arranged on the mounting base;

    A cutting knife, the cutting knife is movably arranged on the mounting base, and both the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base;

    and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component is used to prevent the cutting knife from moving to the firing position in the second state; 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 from the mounting base. The proximal end moves to the distal end of the mounting base, and during the movement of the cutting blade from the proximal end to the distal end, the blade blocking member is switched from the first state to the second state.
14. The nail cartridge assembly according to claim 13, wherein the knife blocking member is configured as an elastic member, and when the cutting knife is in the firing position, the elastic member can act under the pressure of the cutting knife or the nail pushing member. After the transmission structure fires the cutting knife, the elastic member can stretch 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 base to the firing position. sports.​
15. The nail cartridge assembly according to claim 14, wherein the mounting base has a tissue binding surface, and the elastic member can contract and extend in a movable plane that is not parallel to the tissue binding surface to achieve the desired position. Switch between the first state and the second state.
16. The nail cartridge assembly of claim 14, wherein the elastic member is connected to the mounting base.
17. The nail cartridge assembly according to claim 16, wherein the mounting base includes a nail cartridge plate and a protective plate, the nail cartridge plate has a top wall of the nail cartridge and two side walls of the nail cartridge, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to the protective plate member, and the second end of the elastic member moves toward the protective plate member in the first state. Contraction, the second end of the elastic member extends toward the top wall of the nail bin in the second state.
18. The nail cartridge assembly according to claim 16, wherein the mounting base includes a nail cartridge plate and a protective plate, the nail cartridge plate has a top wall of the nail cartridge and two side walls of the nail cartridge, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to the top wall of the nail bin, and the second end of the elastic member moves toward the nail bin in the first state. The top wall contracts, and the second end of the elastic member extends toward the protective plate member in the second state.
19. The nail cartridge assembly according to claim 16, wherein the mounting base includes a nail cartridge plate and a protective plate, the nail cartridge plate has a top wall of the nail cartridge and two side walls of the nail cartridge, and the The installation position is located on the top wall of the nail bin. The two side walls of the nail bin are disposed on opposite sides of the top wall of the nail bin and extend along the axial direction of the mounting base. The protective plate is connected to the The side wall of the nail bin is arranged opposite to the top wall of the nail bin; the first end of the elastic member is connected to one of the side walls of the nail bin, and the second end of the elastic member moves toward the third nail bin in the first state. The side wall of the nail bin where one end is located shrinks, and the second end of the elastic member extends toward the side wall of the nail bin away from the first end in the second state.
20. The nail cartridge assembly of claim 14, wherein the first end of the elastic member is connected to the cutting knife, and the second end of the elastic member shrinks toward the cutting knife in the first state, and the The second end of the elastic member extends in a direction away from the cutting knife in the second state.
21. The nail cartridge assembly according to claim 14, wherein the elastic member is configured as a spring or a spring.
22. The nail cartridge assembly according to claim 13, wherein the knife blocking member is rotated, and when the transmission mechanism drives the cutting knife to move from the firing position to the distal end of the mounting base, it can drive the knife blocking member. Rotate relative to the mounting base to switch the knife blocking member from the first state to the second state.
23. A surgical instrument, characterized in that it includes:

    handle assembly;

    A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

    an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

    A nail cartridge assembly, which is used to be disposed in the installation cavity. The nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife. The mounting base has a plurality of mounting positions for installing suture staples. , the nail pusher and the cutting knife are movably arranged on the mounting base, the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base, and the proximal end of the mounting base has Firing position;

    The buckle has a connecting end and a free end. The connecting end of the buckle is connected to one of the nail bin assembly and the transmission mechanism. The other of the nail bin assembly and the transmission mechanism has a clip. The connecting portion; the free end of the buckle can move close to and away from the plane where the tissue binding surface on the mounting base is located, so as to realize the snap connection and release of the snap connection with the snap joint portion;

    The knife blocking member is capable of switching from a first state to a second state. In the first state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base. The knife blocking member In the second state, it is used to prevent the cutting knife from moving to the firing position;

    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 from the proximal end of the mounting base. Move to the far end of the mounting base; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.
24. A nail cartridge assembly, which is characterized by including:

    A mounting base, the mounting base has a plurality of mounting positions for installing suture staples;

    A nail pusher, which is movably arranged on the mounting base, and the proximal end of the mounting base has a firing position;

    A cutting knife, the cutting knife is movably arranged on the mounting base, and both the nail pushing member and the cutting knife can move from the proximal end to the distal end of the mounting base;

    The buckle has a connecting end and a free end. The free end of the buckle can move close to and away from the plane where the tissue joint surface on the mounting base is located, so as to realize the connection with the transmission mechanism on the surgical instrument. The clamping and releasing of the clamping part;

    and a knife blocking member, the knife blocking member can be switched from a first state to a second state, the knife blocking member allows the cutting knife to move from the firing position to the distal end of the mounting base in the first state, the knife blocking member The component is used to prevent the cutting knife from moving to the firing position in the second state; 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 from the mounting base. The proximal end moves to the distal end of the mounting base; after the cutting knife leaves the firing position, the knife blocking member switches from the first state to the second state.
25. A surgical instrument, characterized in that it includes:

    handle assembly;

    A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

    an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

    And a nail cartridge assembly, the nail cartridge assembly is used to be arranged in the installation cavity, the nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife, the mounting base has a plurality of mounting holes for installing suture staples. position, the nail pusher and the cutting knife are movably arranged on the mounting base, and the nail pusher and the cutting knife can move from the proximal end to the distal end of the mounting base;

    The transmission mechanism is used to cooperate with the cutting blade, and the transmission mechanism can only exert force on the cutting blade from the proximal end of the mounting base to the distal end of the mounting base in the direction of the line connecting the proximal end and the distal end of the mounting base. thrust.
26. A surgical instrument, characterized by including:

    handle assembly;

    A barrel assembly, the proximal end of the barrel assembly is connected to the handle assembly, the barrel assembly includes a transmission mechanism;

    an actuator assembly, the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw is movably connected to the second jaw, The first jaw and the second jaw can move relative to each other to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw;

    And a nail cartridge assembly, the nail cartridge assembly is used to be arranged in the installation cavity, the nail cartridge assembly includes a mounting base, a nail pusher and a cutting knife, the mounting base has a plurality of mounting holes for installing suture staples. position, the nail pusher and the cutting knife are movably arranged on the mounting base, and the nail pusher and the cutting knife can move from the proximal end to the distal end of the mounting base;

    The transmission mechanism can move between the proximal end of the mounting base and the distal end of the mounting base. When the transmission mechanism moves from the proximal end of the mounting base to the distal end of the mounting base, the transmission mechanism cooperates with the cutting blade, and The cutting blade is driven to move from the proximal end of the mounting base to the distal end of the mounting base; when the transmission mechanism moves from the distal end of the mounting base to the proximal end of the mounting base, the transmission mechanism is separated from the cutting blade