WO2024011470A1 - Surgical instrument, anastomotic device and staple bin assembly - Google Patents

Abstract

Disclosed in the present application are a surgical instrument, an anastomotic device and a staple bin assembly. The surgical instrument comprises a handle assembly, a tube assembly, a staple bin assembly, a fastener and an effector assembly. The tube assembly comprises a transmission mechanism. The staple bin assembly comprises a mounting seat, a staple-pushing member and a cutter, wherein the mounting seat is provided with a tissue binding face for coming into contact with tissue, the staple-pushing member is movably arranged on the mounting seat, and the cutter is movably connected to the mounting seat. The fastener has a connection end and a free end, wherein the connection end of the fastener is connected to one of the staple bin assembly and the transmission mechanism, and the other one of the staple bin assembly and the transmission mechanism is provided with an engagement part. The transmission mechanism can drive the staple-pushing member and the cutter to move between a proximal end and a distal end of the mounting seat. The free end of the fastener can move close to and away from the plane where the tissue binding face is located on the mounting seat, so as to engage with and disengage from the engagement part, which is beneficial for improving the reliability of combination and separation between the staple bin assembly and the transmission mechanism.

Description

Surgical instrument, stapler and nail cartridge assembly Technical field

This application relates to the technical field of medical devices, specifically to a surgical instrument, stapler and staple 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.

technical problem

The main technical problem solved by the present invention is that the existing stapler cannot replace the cutting knife when the nail cartridge assembly is replaced. Repeated use of the cutting knife will reduce the sharpness of the cutting knife, thereby reducing the quality of surgery.

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;

Nail cartridge assembly, 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 mounting base has a tissue binding surface for contacting with tissue. , the nail pushing member is movably arranged on the mounting base, the cutting knife is movably connected to the mounting base, and the nail pushing member and the cutting knife can move between the proximal end and the distal end of the mounting base. ;

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. connecting part;

and 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 relatively to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw, and the nail cartridge assembly is arranged in the installation cavity Inside the body, the distal end of the transmission mechanism extends into the installation cavity;

The transmission mechanism can drive the nail pusher and the cutting knife to move between the proximal end and the distal end of the mounting base; the free end of the buckle can move close to and away from the plane where the tissue joining surface on the mounting base is located. , so as to realize the locking and releasing of the locking part.

In one embodiment, the connecting end of the buckle is connected to the cutting knife.

In one embodiment, the cutting blade and the buckle are of an integrated structure.

In one embodiment, the connecting end of the buckle component is connected to the nail push component.

In one embodiment, the push pin part and the buckle part are of an integrated structure.

In one embodiment, at least part of the buckle is an elastic structure, the first jaw has a snap guide surface, and the transmission mechanism drives the nail pusher and the cutting knife along the snap guide surface. When the distal end of the actuator assembly moves, the clamping guide surface conflicts with the buckle piece, so that the buckle piece deforms and drives the free end of the buckle piece close to the mounting base. The plane where the tissue joint surface is located moves to realize the clamping with the clamping portion; when the transmission mechanism drives the nail pusher and the cutting knife to move along the clamping guide toward the proximal end of the actuator assembly, Under the action of the elastic restoring force of the elastic structure, the free end of the buckle component drives the free end of the buckle component to move away from the plane where the tissue binding surface on the mounting base is located, so as to achieve release from the snap connection part.

In one embodiment, the entire buckle is made of elastic material.

In one embodiment, the snap-in portion is configured as a snap-in groove, the free end of the snap-in piece has a snap-in portion, the snap-in slot includes a positioning portion and a guide portion, and the snap-in portion can move along any direction. The guide part moves to embed or disengage from the positioning part.

In one embodiment, the proximal end of the mounting base has a disengagement guide surface. When the transmission mechanism drives the nail pusher and the cutting knife to move toward the proximal end of the actuator assembly, the disengagement guide surface can be connected with the proximal end of the actuator assembly. The buckle part resists to drive the buckle part to separate from the positioning part.

In one embodiment, the free end of the buckle moves closer to and away from the plane where the tissue joining surface is located in a direction perpendicular to the tissue joining surface.

In one embodiment, the mounting base has a movable cavity arranged along its axial direction, and the nail pushing member and the cutting knife are movably arranged in the movable cavity.

In one embodiment, the mounting base has a supporting portion located on a side of the movable cavity away from the mounting position for supporting the nail pusher and the cutting knife.

In one embodiment, the proximal end of the mounting base has a limiting portion, and the limiting portion is used to prevent the pusher member and the cutting knife from being separated from the movable cavity from the proximal end of the mounting base.

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 nail cartridge assembly has a second unlocking part. When the nail cartridge assembly is installed in the installation cavity, the first unlocking part cooperates with the second unlocking part so that the locking part The locking part and the transmission mechanism are unlocked; when the locking part and the transmission mechanism are unlocked, the transmission mechanism can drive the nail pusher and the cutting knife to move from the proximal end to the distal end of the mounting base.

In one embodiment, the locking portion conflicts with the distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the nail cartridge assembly is correctly installed in the installation cavity, the first unlocking The second unlocking part contacts the second unlocking part to drive the distal end of the transmission mechanism to disengage from the locking part, thereby realizing unlocking of the transmission mechanism.

In one embodiment, the first unlocking portion is configured as a protruding portion extending toward the nail cartridge assembly, the second unlocking portion is configured as an unlocking groove, the protruding portion has a first unlocking guide surface, and the unlocking portion The groove has a second unlocking guide surface; when the protruding portion is embedded in the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism to disengage from the locking portion.

In a second aspect, an embodiment provides a stapler, 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;

and 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 achieve closing and opening; an installation cavity for installing the nail cartridge assembly is formed between the first jaw and the second jaw, and the transmission mechanism Extend into the installation cavity;

The transmission mechanism is used to drive the nail pusher and the cutting knife of the nail cartridge assembly to move between the proximal end and the distal end of the mounting base; the transmission mechanism has a snap-in portion, and the snap-in portion is used to connect with the nail cartridge assembly. The buckle engages and releases the engagement along a movement path close to and away from the plane where the tissue binding surface on the mounting base is located.

In one embodiment, the engaging portion is configured as a engaging groove, and the engaging groove includes a positioning portion and a guide portion, and the guide portion is used to guide the engaging portion at the free end of the buckle to be inserted into or disengaged from the positioning portion.

In a third 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 mounting base has a tissue binding surface for contacting with tissue;

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

A cutting knife, the cutting knife is connected to the mounting base, the pusher member and the cutting knife are movable between the proximal end and the distal end of the mounting base; and

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 achieve the connection with the buckle of the transmission mechanism. Detaching and detaching.

In one embodiment, the connecting end of the buckle is connected to the cutting knife.

In one embodiment, the cutting blade and the buckle are of an integrated structure.

In one embodiment, the connecting end of the buckle component is connected to the nail push component.

In one embodiment, the push pin part and the buckle part are of an integrated structure.

In one embodiment, at least part of the buckle is an elastic structure, the first jaw has a buckle guide surface, and the transmission mechanism drives the nail pusher and the cutting knife along the buckle guide surface. When the distal end of the actuator assembly moves, the clamping guide surface conflicts with the buckle piece, so that the buckle piece deforms and drives the free end of the buckle piece to be close to the tissue on the mounting base. The plane of the surface moves to achieve snap-in connection with the snap-in part; when the transmission mechanism drives the nail pusher and the cutting knife to move along the snap-in guide toward the proximal end of the actuator assembly, the The buckle component recovers its deformation under the elastic restoring force of the elastic structure, and drives the free end of the buckle component to move away from the plane where the tissue bonding surface on the mounting base is located, so as to release the snap connection with the snap connection part.

In one embodiment, the entire buckle is made of elastic material.

In one embodiment, the proximal end of the mounting base has a detachment guide surface, and one end of the buckle facing the transmission mechanism has a buckling portion, and the transmission mechanism drives the nail pusher and the cutting knife toward the When the proximal end of the actuator assembly moves, the disengagement guide surface conflicts with the buckle part to drive the buckle part to disengage from the buckle part of the transmission mechanism.

In one embodiment, the free end of the buckle moves closer to and away from the plane where the tissue joining surface is located in a direction perpendicular to the tissue joining surface.

In one embodiment, the mounting base has a movable cavity arranged along the axial direction, and the nail pushing member and the cutting knife are movably arranged in the movable cavity.

In one embodiment, the mounting base has a supporting portion located on a side of the movable cavity away from the mounting position for supporting the nail pusher and the cutting knife.

In one embodiment, the proximal end of the mounting base has a limiting portion, and the limiting portion is used to prevent the pusher member and the cutting knife from being separated from the movable cavity from the proximal end of the mounting base.

In a fourth aspect, an embodiment provides a stapler, 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;

and 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 achieve closing and opening; an installation cavity for installing the nail cartridge assembly is formed between the first jaw and the second jaw, and the transmission mechanism Extending into the mounting cavity; the drive mechanism nail pushing member and the cutting blade move between the proximal end and the distal end of the mounting base; and

The buckle has a connecting end and a free end, and the connecting end of the buckle is arranged on the transmission mechanism; the free end of the buckle can be close to and away from the tissue joint surface on the mounting base. Planar movement to achieve engagement and release of engagement with the engagement portion of the nail cartridge assembly.

In one embodiment, the connecting end of the buckle is connected to the distal end of the transmission mechanism.

In one embodiment, the buckle and the transmission mechanism are of an integrated structure.

In a fifth 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 mounting base has a tissue binding surface for contacting with tissue;

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

A cutting knife, the cutting knife is connected to the mounting base, the pusher member and the cutting knife are movable between the proximal end and the distal end of the mounting base; and

The clamping part is provided on the nail pusher or the cutting knife. The clamping part is used to move with the clamping part of the stapler along a plane close to and away from the tissue joining surface on the mounting base. Path carding and unbuckling.

In one embodiment, the clamping portion is connected to the cutting blade.

In one embodiment, the clamping portion and the cutting blade are of an integrated structure.

In one embodiment, the clamping portion is connected to the nail pusher.

In one embodiment, the clamping portion and the nail pushing member are of an integrated structure.

beneficial effects

Surgical instruments, staplers and staple cartridge assemblies according to the above embodiments. On the one hand, since the cutting knife is arranged on the mounting base of the nail cartridge assembly, each time the nail cartridge assembly is replaced, the cutting knife is replaced simultaneously, thereby helping to avoid medical risks caused by reduced sharpness of the cutting blade. On the other hand, due to the addition of the buckle part and the buckle part, the buckle part can be moved toward a plane close to the tissue binding surface on the mounting base to realize the snap connection with the buckle part, thereby realizing the nail cartridge assembly. Snap fit with the transmission mechanism. By moving the buckle to a plane away from the tissue bonding surface on the mounting base, the buckle is released from the buckling portion, thereby unlocking the nail cartridge assembly and the transmission mechanism, thereby facilitating the lifting of the nail cartridge assembly. Reliability of combination and separation with the transmission mechanism.

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 cross-sectional view of the nail cartridge assembly in an embodiment of the present application;

Figure 3 is a schematic diagram of a three-dimensional view of the nail cartridge assembly in an embodiment of the present application;

Figure 4 is a schematic structural diagram of the actuator assembly and driving mechanism in an embodiment of the present application;

Figure 5 is a schematic structural diagram of the transmission mechanism and the cutting knife preparing to cooperate and unlock in an embodiment of the present application;

Figure 6 is an enlarged view of position A in Figure 5 of the present application;

Figure 7 is a schematic structural diagram of the equipment firing after the transmission mechanism and the cutting knife are unlocked in cooperation with one embodiment of the present application;

Figure 8 is an enlarged view of B in Figure 7 of the present application;

Figure 9 is a schematic structural diagram of the transmission mechanism and the cutting knife preparing to separate after retracting in an embodiment of the present application;

Figure 10 is an enlarged view of C in Figure 9 of the present application;

Figure 11 is a schematic structural diagram of the transmission mechanism and the locking part locked in an embodiment of the present application;

Figure 12 is an enlarged view of D in Figure 11 of this application;

Figure 13 is a schematic structural diagram of the transmission mechanism and the cutting knife continuing to move toward the proximal end after separation in an embodiment of the present application;

Figure 14 is an enlarged view of E in Figure 13 of the present application;

Figure 15 is a schematic cross-sectional view showing the nail cartridge assembly disengaging from the guide surface in an embodiment of the present application;

Figure 16 is an enlarged view of F in Figure 15 of the present application;

Figure 17 is a schematic cross-sectional view of the fastener of the nail cartridge assembly in contact with the detachment guide surface in an embodiment of the present application;

Figure 18 is an enlarged view of G in Figure 17 of the present application;

Figure 19 is a cross-sectional view of the actuator assembly and driving mechanism in another embodiment of the present application;

Figure 20 is an enlarged view of position H in Figure 19 of the present application;

Reference signs: 100. Handle assembly; 110. Fixed handle; 120. Movable handle; 200. Barrel assembly; 210. Transmission mechanism; 211. First unlocking part; 2111. Protruding part; 2112 First unlocking guide surface; 212. Fitting groove; 213. Fitting part; 214. Driving part; 215. Protruding structure; 216. Snapping part; 2161. Snapping groove; 2162. Positioning part; 2163. Guide part; 300. Actuator assembly; 310 , first jaw; 320, second jaw; 330, locking part; 340, locking shrapnel; 400, nail bin assembly; 410, mounting base; 411, clamping guide surface; 412, tissue binding surface; 413, movable Cavity; 414, supporting part; 415, limiting part; 416, escape guide surface; 420, push pin; 430, cutting knife; 440, second unlocking part; 441, unlocking groove; 442, second unlocking guide surface; 450, fastener; 451, fastening part.

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 movable handle 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 closing transmission chain is then triggered through the movable handle 120, so that the jaws of the actuator assembly 300 are closed and clamped at a specific position near the lesion. Then, the firing transmission chain is triggered by the movable handle 120, so that the cutting knife 430 in the actuator assembly 300 cuts off the tissue, and at the same time, the tissue is sutured through the suture staples in the actuator assembly 300.

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.

This embodiment provides a surgical instrument.

Please refer to Figures 1-14. The surgical instrument includes a handle assembly 100, a barrel assembly 200, a staple cartridge assembly 400, a buckle 450 and an actuator assembly 300.

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 staple 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 mounting positions for installing suture staples. The mounting base 410 has a tissue binding surface 412 for contacting with tissue. The nail pusher 410 The member 420 is movably arranged on the mounting base 410, the cutting blade 430 is movably connected with the mounting base 410, and the push pin member 420 and the cutting blade 430 can move between the proximal end and the distal end of the mounting base 410. The buckle piece 450 has a connecting end and a free end. The connecting end of the buckle piece 450 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 clamping portion 216 .

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 disposed in the installation cavity, and the distal end of the transmission mechanism 210 extends into the installation cavity.

The transmission mechanism 210 can drive the nail pushing member 420 and the cutting blade 430 to move between the proximal end and the distal end of the mounting base 410 . The free end of the buckle 450 can move closer to and away from the plane where the tissue combining surface 412 on the mounting base 410 is located, so as to realize the buckling and unlocking with the buckling portion 216 .

It should be noted that the tissue binding surface 412 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 412 of the mounting base 410 to achieve suturing of the tissue.

On the one hand, since the cutting knife 430 is disposed on the mounting seat 410 of the nail cartridge assembly 400, each time the nail cartridge assembly 400 is replaced, the cutting knife 430 is replaced simultaneously, thereby helping to avoid the decrease in the sharpness of the cutting knife 430. medical risks. On the other hand, due to the addition of the buckling part 450 and the buckling part 216, the buckling part 450 can be moved to a plane close to the tissue binding surface 412 on the mounting base 410 to achieve the buckling part 216. , thereby realizing the snap fit between the nail cartridge assembly 400 and the transmission mechanism 210 . By moving the buckle 450 toward a plane away from the tissue coupling surface 412 on the mounting base 410, the buckle 450 is released from the locking portion 216, and then the nail cartridge assembly 400 and the transmission mechanism 210 are released from the locking. It is beneficial to improve the reliability of the combination and separation between the nail cartridge assembly 400 and the transmission mechanism 210.

Please refer to Figure 4-12. In an actual application scenario, after the nail cartridge assembly 400 is installed into the installation cavity, there is a certain gap between the first unlocking part 211 on the transmission mechanism 210 and the second unlocking part 440 on the cutting blade 430. distance. Please refer to Figures 6 and 8. After the operator performs the firing operation, the transmission mechanism 210 moves to the distal end, so that the first unlocking part 211 cooperates with the second unlocking part 440, the buckle 450 snaps with the buckle part 216, and the transmission mechanism 210 pushes the cutting knife 430 and the pusher member 420 to move toward the distal end to complete firing. After the firing is completed, the transmission mechanism 210 drives the cutting knife 430 to move proximally. When it reaches the position shown in Figure 10, the buckle 450 separates from the clamping portion 216 under the action of its own elastic force. The transmission mechanism 210 separates from the cutting knife 430, and the transmission mechanism 210 separates from the cutting knife 430. Mechanism 210 continues movement to the position in Figure 14. As shown in Figure 12, when the nail cartridge assembly 400 is not installed in the installation cavity, or the cutting knife 430 of the nail cartridge assembly 400 is not in its initial position, if the operator performs the firing operation again, the transmission mechanism 210 will move to the distal end. At this time, the first unlocking part 211 and the second unlocking part 440 do not cooperate. Under the elastic force of the locking elastic piece 340, the transmission mechanism 210 conflicts with the locking part 330, and the insurance takes effect.

It should be noted that the nail cartridge assembly 400 can be regarded as a part of the actuator assembly 300. For example, the nail cartridge assembly 400 can be fixedly connected to the first jaw 310 or the second jaw 320 or form an integrated structure. The nail cartridge assembly 400 can also be regarded as a component independent of the actuator assembly 300. For example, the nail cartridge assembly 400 can be detachably installed on the first jaw 310 or the second jaw 320, so that the nail cartridge assembly 400 can be regarded as an application. consumables for the actuator assembly 300.

It can be understood that when the staple cartridge assembly 400 is regarded as a consumable material applied to the actuator assembly 300 and the buckle 450 is located in the staple cartridge assembly 400, this embodiment provides a stapler.

Please refer to Figures 4-12. The stapler includes a handle assembly 100, a barrel assembly 200 and an actuator assembly 300.

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 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 for installing the nail cartridge assembly 400 is formed between the first jaw 310 and the second jaw 320 , and the transmission mechanism 210 extends into the installation cavity.

The transmission mechanism 210 is used to drive the nail pusher 420 and the cutting blade 430 of the nail cartridge assembly 400 to move between the proximal end and the distal end of the mounting base 410 . The transmission mechanism 210 has a clamping portion 216, which is used to engage with the buckle 450 of the nail cartridge assembly 400 along a movement path close to and away from the plane where the tissue binding surface 412 on the mounting base 410 is located. and release the card connection.

This embodiment also provides a nail cartridge assembly 400.

Please refer to Figures 1-3, 7 and 8. The nail cartridge assembly 400 includes a mounting base 410, a nail pusher 420, a cutting blade 430 and a buckle 450.

The mounting base 410 has a plurality of mounting positions for installing suture staples, and the mounting base 410 has a tissue combining surface 412 for contacting tissue. The nail pushing member 420 is movably arranged on the mounting base 410, the cutting blade 430 is connected to the mounting base 410, and the nail pushing member 420 and the cutting blade 430 can be positioned at the proximal end of the mounting base 410 and the cutting blade 430. movement between distal ends. The buckle 450 has a connecting end and a free end. The free end of the buckle 450 can move close to and away from the plane where the tissue binding surface 412 on the mounting base 410 is located, so as to realize the buckle with the transmission mechanism 210. 216 card connection and release card connection.

Please refer to FIGS. 1-6 . In one embodiment, the connecting end of the buckle 450 is connected to the cutting blade 430 .

Since the connection end of the buckle 450 is connected to the cutting blade 430, when the buckle 450 is clamped with the clamping portion 216, the cutting blade 430 can be closely matched with the transmission mechanism 210, so that the transmission mechanism 210 can drive cutting more stably. The movement of the knife 430 is beneficial to improving the reliability of the cutting action of the cutting knife 430 . When the buckle 450 is released from the buckling portion 216, the transmission mechanism 210 can be separated from the cutting knife 430 to complete the retracting action of the cutting knife 430. In other embodiments, the connecting end of the buckle component 450 can also be connected to the push pin component 420 .

Please refer to Figures 1-6. In one embodiment, the cutting blade 430 and the buckle 450 are of an integrated structure.

On the one hand, by designing the cutting blade 430 and the buckle 450 into an integrated structure, the assembly steps of the cutting blade 430 and the buckle 450 are reduced, thereby simplifying the assembly steps of the surgical instrument. On the other hand, the risk of the buckle 450 detaching from the cutting knife 430 due to insufficient connection between the buckle 450 and the cutting blade 430 is avoided. In other embodiments, the buckle part 450 and the push pin part 420 may also be an integral structure.

Please refer to Figures 7 and 8. In one embodiment, at least part of the buckle 450 is an elastic structure, the first jaw 310 has a buckle guide surface 411, and the transmission mechanism 210 drives the nail pusher 420 and the cutting knife 430 along the When the snap-in guide surface 411 moves toward the distal end of the actuator assembly 300, the snap-in guide surface 411 conflicts with the snap-in part 450, so that the snap-in part 450 deforms and drives the free end of the snap-in part 450 to approach the mounting base 410. The plane on which the tissue combining surface 412 is located moves to realize the engagement with the engaging portion 216 . When the transmission mechanism 210 drives the nail pusher 420 and the cutting knife 430 to move toward the proximal end of the actuator assembly 300 along the clamping guide surface 411, the buckle 450 drives the free end of the buckle 450 under the elastic restoring force of the elastic structure. Move away from the plane where the tissue binding surface 412 on the mounting base 410 is located, so as to release the engagement with the engagement portion 216 .

The operator does not need to perform additional operations. The transmission mechanism 210 only drives the nail pusher 420 and the cutting knife 430 to move toward the distal and proximal ends of the actuator assembly 300, and the locking member 450 and the locking portion 216 can be automatically connected. Snapping and unlocking, thus simplifying the operator's operations. Specifically, the buckle 450 can be made of elastic material as a whole.

In other embodiments, the buckle 450 may also be a rigid structure. For example, the buckle 450 is a rigid rod, and the connecting end of the buckle 450 is rotationally connected to the cutting blade 430. When the buckle guide surface 411 collides with the buckle 450, the free end of the buckle 450 is driven close to the mounting base 410. The plane where the tissue combining surface 412 is located rotates to achieve the locking connection with the locking portion 216 . A torsion spring can be provided at one end of the fastening member 450 that is rotationally connected to the cutting blade 430. The torsion spring drives the free end of the fastening member 450 to rotate away from the plane where the tissue binding surface 412 on the mounting base 410 is located, so as to realize the connection with the fastening portion. 216 to release the stuck connection.

Please refer to Figures 1-3, 7 and 8. In one embodiment, the snap portion 216 is configured as a snap slot 2161. The free end of the snap piece 450 has a snap portion 451. The snap slot 2161 includes a positioning portion 2162. and the guide portion 2163. The buckle portion 451 can move along the guide portion 2163 to embed or disengage from the positioning portion 2162.

On the one hand, the latching portion 216 adopts a latching groove 2161, and the latching and releasing of the latching member 450 can be achieved through a simple structure. And the snap-in groove 2161 can be directly provided on existing components. For example, the snap-in groove 2161 can be provided on the transmission mechanism 210 without adding additional parts. On the other hand, the guide portion 2163 of the engaging groove 2161 guides the engaging portion 451 of the engaging element 450 to embed or disengage from the positioning portion 2162, which facilitates the process of engaging and releasing the engaging element 450 with the engaging groove 2161. reliability. In other embodiments, various hole structures and recessed structures can also be used to replace the snap-in groove 2161.

Please refer to Figures 15-18. In one embodiment, the proximal end of the mounting base 410 has a disengagement guide surface 416. When the transmission mechanism 210 drives the nail pusher 420 and the cutting knife 430 to move toward the proximal end of the actuator assembly 300, the disengagement guide surface 416 is disengaged. The guide surface 416 can conflict with the buckle 450 to drive the free end of the buckle 450 away from the buckle portion 216 .

The disengagement guide surface 416 can be used as insurance for the latch 450 to disengage from the latch portion 216. Specifically, when the nail pusher 420 and the cutting knife 430 move toward the proximal end of the actuator assembly 300, they first pass through the above-mentioned latch guide surface 411. , and then move to break away from the guide surface 416. The meaning that the escape guide surface 416 "can" conflict with the buckle 450 is that when the pusher 420 and the cutting knife 430 move toward the proximal end of the actuator assembly 300 to the buckle guide surface 411 first, if the buckle 450 can Under the action of its own elastic restoring force, the free end of the buckle 450 is driven away from the buckle 216 , so that the separation guide surface 416 will not conflict with the buckle 450 . If the elastic structure of the buckle 450 fails or the elastic force is insufficient and cannot drive the free end of the buckle 450 away from the clamping portion 216, then when the nail pusher 420 and the cutting knife 430 pass through the separation guide surface 416, they will break away from the guide surface 416. It collides with the buckle 450 and drives the free end of the buckle 450 away from the buckle 216 .

Please refer to FIGS. 1-3 , 7 and 8 . In one embodiment, the free end of the buckle 450 moves closer to and away from the plane where the tissue joining surface 412 is located in a direction perpendicular to the tissue joining surface 412 . Since the movement direction of the free end of the buckle 450 is perpendicular to the tissue joining surface 412 on the mounting base 410, the movement of the buckle 450 will not interfere with the pusher 420 and the cutting blade 430 at the proximal and distal ends of the mounting base 410. movement between.

Please refer to FIGS. 1-3 . In one embodiment, the mounting base 410 has a movable cavity 413 disposed along its axial direction, and the nail pushing member 420 and the cutting blade 430 are movably disposed in the movable cavity 413 . The movement direction of the pusher member 420 and the cutting blade 430 is defined by the movable cavity 413 to ensure that the pusher member and the cutting member can move between the proximal end and the distal end of the mounting base 410 along the axial direction of the swivel base.

Please refer to Figures 1-3. In one embodiment, the mounting base 410 has a supporting portion 414. The supporting portion 414 is located on the side of the movable cavity 413 away from the installation position to support the push pin member 420 and the cutting knife. 430. The supporting portion 414 prevents the pusher 420 and the cutting blade 430 from being separated from the movable cavity 413 from the side of the mounting base 410 away from the mounting position.

Please refer to Figures 1-3. In one embodiment, the proximal end of the mounting base 410 has a limiting portion 415. The limiting portion 415 is used to prevent the push pin 420 and the cutting knife 430 from disengaging from the proximal end of the mounting base 410. Cavity 413. The limiting portion 415 prevents the pusher and the cutting blade 430 from being separated from the movable cavity 413 from the proximal end of the mounting base 410 .

Please refer to Figures 4-6 and 9-14. 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 along the axis of the actuator assembly 300. towards movement. The transmission mechanism 210 has a first unlocking part 211, and the nail cartridge assembly 400 has a second unlocking part 440. When the nail cartridge assembly 400 is installed in the installation cavity, the first unlocking part 211 cooperates with the second unlocking part 440, so that the locking part 330 Unlock the transmission mechanism 210 . When the locking part 330 and the transmission mechanism 210 are unlocked, the transmission mechanism 210 can drive the nail pusher 420 and the cutting blade 430 to move from the proximal end to the distal end of the mounting base 410 .

Since the locking portion 330 on the actuator assembly 300 is used to lock the transmission mechanism 210, and the first unlocking portion 211 on the transmission mechanism 210 and the second unlocking portion 440 on the nail cartridge assembly 400 are used to unlock the transmission mechanism 210, The insurance function can be realized by just adding features to existing parts without adding complex insurance clips and spring drive structures, which helps improve the reliability of the insurance function and prevents the insurance clip from falling into the human body after failure. risks of.

Please refer to FIGS. 4-6 and 9-14 . In one embodiment, the locking portion 330 conflicts with the distal end of the transmission mechanism 210 to achieve locking with the transmission mechanism 210 . When the nail cartridge assembly 400 is correctly installed in the installation cavity, the first unlocking part 211 contacts the second unlocking part 440 to drive the distal end of the transmission mechanism 210 to disengage from the locking part 330, thereby unlocking the transmission mechanism 210.

By the locking part 330 colliding with or disengaging from the distal end of the transmission mechanism 210 , the locking part 330 and the transmission mechanism 210 are locked or unlocked. The advantage of using this locking method is that since the locking method is relatively simple and direct, it is conducive to designing the locking part 330 and the transmission mechanism 210 to be simpler, and there is no need to add additional components with complex structures, thereby increasing the number of locking and unlocking steps. Process reliability. Of course, in other embodiments, the locking method in this embodiment can also be replaced by damping locking, electromagnetic locking or other suitable locking methods.

Referring to Figures 11-14, in one embodiment, the locking portion 330 extends in a direction perpendicular to a line connecting the distal end and the proximal end of the actuator assembly 300.

By moving the transmission mechanism 210 in a direction perpendicular to the line connecting the distal end and the proximal end of the actuator assembly 300, the friction and disengagement from the locking portion 330 can be achieved. Since the locking and unlocking movement direction of the transmission mechanism 210 is perpendicular to the direction in which the transmission mechanism 210 fires the cutting knife 430, the locking and unlocking actions of the transmission mechanism 210 will not interfere with the firing action of the transmission mechanism 210.

Please refer to Figures 5-8. In one embodiment, the actuator assembly 300 further includes a locking elastic piece 340. The locking elastic piece 340 is located on the movement path of the transmission mechanism 210. The elastic restoring force of the locking elastic piece 340 is used to drive the transmission mechanism 210 to move. to lock with the locking part 330 .

When the proximal end of the actuator assembly 300 moves to the position where the locking part 330 is located, the elastic restoring force of the locking elastic piece 340 can drive the transmission mechanism 210 to move to lock with the locking part 330. Specifically, in this embodiment, the elastic restoring force of the locking spring piece 340 can be set perpendicular to the direction of the connection between the distal end and the proximal end of the actuator assembly 300. In other embodiments, springs, elastic blocks or other suitable elastic components may also be used to replace the locking spring piece 340 .

Please refer to Figures 5-8. In one embodiment, the transmission mechanism 210 includes a fitting part 213 and a driving part 214. The first unlocking part 211 is located on the side of the fitting part 213 facing the nail cartridge assembly 400. The driving part 214 and the fitting part 214 213 is connected, the driving member 214 has a protruding structure 215 extending away from the mating member 213, and the locking elastic piece 340 can conflict with the protruding structure 215.

The fitting part 213 is used to cooperate with the nail cartridge assembly 400 or the locking part 330, and the driving part 214 pushes the fitting part 213 to move from the proximal end to the distal end of the actuator assembly 300. The elastic restoring force of the locking elastic piece 340 acts on the protruding structure 215 to drive the driving member 214 to move, and then drives the matching member 213 to conflict with the locking portion 330 through the driving member 214 . Specifically, in this embodiment, the elastic restoring force of the locking spring piece 340 can be set perpendicular to the direction of the connection between the distal end and the proximal end of the actuator assembly 300.

Please refer to Figures 4-6. In one embodiment, the first unlocking portion 211 is configured as a protruding portion 2111 extending toward the nail cartridge assembly 400, the second unlocking portion 440 is configured as an unlocking groove 441, and the protruding portion 2111 has a third An unlocking guide surface 2112, the unlocking groove 441 has a second unlocking guide surface 442. When the protruding portion 2111 is inserted into the unlocking groove 441 , the first unlocking guide surface 2112 contacts the second unlocking guide surface 442 to drive the transmission mechanism 210 to disengage from the locking portion 330 .

When the user installs the nail cartridge assembly 400 into the installation cavity, the protruding portion 2111 is driven to engage in the unlocking groove 441, and the first unlocking guide surface 2112 is in contact with the second unlocking guide surface 442, thereby driving the transmission mechanism 210 to disengage from the locking portion. 330. The structure of the protruding portion 2111 and the unlocking groove 441 is simple, and can be easily combined with the staple cartridge assembly 400 and the transmission mechanism 210 into an integrated structure, thus helping to reduce assembly complexity and system risk factors caused by additional parts. In other embodiments, the protruding portion 2111 and the unlocking groove 441 can also be simply replaced and deformed. For example, the positions of the protruding portion 2111 and the unlocking groove 441 can be replaced, and the protruding portion 2111 can be disposed on the nail cartridge assembly 400 , the unlocking groove 441 is provided on the transmission mechanism 210 .

In one embodiment, the positions of the buckle 450 and the buckle portion 216 can also be simply exchanged. For example, please refer to Figures 19 and 20. When the buckle 450 is located at the transmission mechanism 210, this embodiment provides a matching device.

The stapler includes a handle assembly 100, a barrel assembly 200 and an actuator assembly 300.

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 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 for installing the nail cartridge assembly 400 is formed between the first jaw 310 and the second jaw 320 , and the transmission mechanism 210 extends into the installation cavity. The driving mechanism 210 moves the nail pushing member 420 and the cutting blade 430 between the proximal end and the distal end of the mounting base 410 .

The buckle 450 has a connecting end and a free end, and the connecting end of the buckle 450 is provided on the transmission mechanism 210 . The free end of the buckle 450 can move closer to and away from the plane where the tissue binding surface 412 on the mounting base 410 is located, so as to achieve engagement and release with the engagement portion 216 of the nail cartridge assembly 400 .

Optionally, the connecting end of the buckle 450 can be connected to the distal end of the transmission mechanism 210 , or the buckle 450 and the transmission mechanism 210 can also be an integral structure.

Please refer to Figures 19 and 20. When the buckle 450 is located at the transmission mechanism 210, this embodiment also provides a nail cartridge assembly 400.

The nail cartridge assembly 400 includes a mounting base 410 , a nail pusher 420 , a cutting blade 430 and a clamping portion 216 .

The mounting base 410 has a plurality of mounting positions for installing suture staples, and the mounting base 410 has a tissue combining surface 412 for contacting tissue. The nail pushing member 420 is movably arranged on the mounting base 410, the cutting blade 430 is connected to the mounting base 410, and the nail pushing member 420 and the cutting blade 430 can be positioned at the proximal end of the mounting base 410 and the cutting blade 430. movement between distal ends. The clamping portion 216 is provided on the pusher 420 or the cutting knife 430, and the clamping portion 216 is used to engage with the clamping member 450 of the stapler along a direction close to and away from the tissue joining surface 412 on the mounting base 410. Planar movement paths engage and unengage.

Optionally, the clamping part 216 may be connected to the cutting blade 430 , and the clamping part 216 may also be an integral structure with the cutting blade 430 . The clamping portion 216 can be connected to the nail pusher 420 , and the clamping portion 216 can also be an integral structure with the nail pusher 420 .

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 (38)

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; Nail cartridge assembly, 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 mounting base has a tissue binding surface for contacting with tissue. , the nail pushing member is movably arranged on the mounting base, the cutting knife is movably connected to the mounting base, and the nail pushing member and the cutting knife can move between the proximal end and the distal end of the mounting base. ; 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. connecting part; and 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 relatively to achieve closing and opening; an installation cavity is formed between the first jaw and the second jaw, and the nail cartridge assembly is arranged in the installation cavity Inside the body, the distal end of the transmission mechanism extends into the installation cavity; The transmission mechanism can drive the nail pusher and the cutting knife to move between the proximal end and the distal end of the mounting base; the free end of the buckle can move close to and away from the plane where the tissue joining surface on the mounting base is located. , so as to realize the locking and releasing of the locking part. as claimed 1 The surgical instrument is characterized in that the connecting end of the buckle is connected to the cutting blade. as claimed 1 The surgical instrument is characterized in that the cutting knife and the buckle are of an integrated structure. as claimed 1 The surgical instrument is characterized in that the connecting end of the buckle is connected to the pusher. as claimed 1 The surgical instrument is characterized in that the pusher part and the buckle part are of an integrated structure. as claimed 1 The surgical instrument is characterized in that at least part of the buckle has an elastic structure, the first jaw has a buckling guide surface, and the transmission mechanism drives the pusher and the cutting blade edge. When the snap-in guide moves towards the distal end of the actuator assembly, the snap-in guide surface conflicts with the snap-in part, so that the snap-in part is deformed and drives the free end of the snap-in part Move close to the plane where the tissue bonding surface on the mounting base is located to achieve snap-in connection with the snap-in part; the transmission mechanism drives the nail pusher and the cutting knife along the snap-in guide toward the actuator assembly. When the proximal end moves, the buckle component drives the free end of the buckle component away from the plane where the tissue bonding surface on the mounting base is located under the elastic restoring force of the elastic structure to achieve release from the buckle portion. Card access. as claimed 6 The surgical instrument is characterized in that the entire buckle is made of elastic material. as claimed 1 The surgical instrument is characterized in that the buckle part is configured as a buckle groove, the free end of the buckle piece has a buckle part, the buckle groove includes a positioning part and a guide part, and the buckle The joint part can move along the guide part to embed or disengage from the positioning part. as claimed 1 The surgical instrument is characterized in that the proximal end of the mounting seat has a detachment guide surface, and when the transmission mechanism drives the nail pusher and the cutting knife to move toward the proximal end of the actuator assembly, the The detachment guide surface can conflict with the buckle part to drive the free end of the buckle part to break away from the buckle part. as claimed 1 The surgical instrument is characterized in that the free end of the buckle moves closer to and away from the plane where the tissue joining surface is located in a direction perpendicular to the tissue joining surface. as claimed 1 The surgical instrument is characterized in that the mounting base has a movable cavity arranged along its axial direction, and the nail pushing member and the cutting knife are movably arranged in the movable cavity. as claimed 11 The surgical instrument is characterized in that the mounting base has a supporting portion, the supporting portion is located on the side of the movable cavity away from the mounting position, and is used to support the nail pushing member and the cutting knife. as claimed 11 The surgical instrument is characterized in that the proximal end of the mounting base has a limiting portion, and the limiting portion is used to prevent the nail pusher and the cutting knife from detaching from the proximal end of the mounting base. Active cavity. as claimed 1-13 The surgical instrument according to any one of the preceding paragraphs, wherein the actuator assembly has a locking portion for locking with the transmission mechanism to prevent the transmission mechanism from moving along the axis of the actuator assembly. movement; the transmission mechanism has a first unlocking part, and the nail cartridge assembly has a second unlocking part. When the nail cartridge assembly is installed in the installation cavity, the first unlocking part and the second unlocking part The locking part and the transmission mechanism are unlocked; when the locking part and the transmission mechanism are unlocked, the transmission mechanism can drive the nail pusher and the cutting knife to move from the proximal end to the distal end of the mounting base. . as claimed 14 The surgical instrument is characterized in that the locking part conflicts with the distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the nail cartridge assembly is correctly installed in the installation cavity, The first unlocking part contacts the second unlocking part to drive the distal end of the transmission mechanism to disengage from the locking part, thereby realizing unlocking from the transmission mechanism. as claimed 14 The surgical instrument is characterized in that the first unlocking part is configured as a protruding part extending toward the staple cartridge assembly, the second unlocking part is configured as an unlocking groove, and the protruding part has a first unlocking guide. surface, the unlocking groove has a second unlocking guide surface; when the protrusion is embedded in the unlocking groove, the first unlocking guide surface contacts with the second unlocking guide surface to drive the transmission mechanism away from the Locking Department. A stapler, 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; and 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 achieve closing and opening; an installation cavity for installing the nail cartridge assembly is formed between the first jaw and the second jaw, and the transmission mechanism Extend into the installation cavity; The transmission mechanism is used to drive the nail pusher and the cutting knife of the nail cartridge assembly to move between the proximal end and the distal end of the mounting base; the transmission mechanism has a snap-in portion, and the snap-in portion is used to connect with the nail cartridge assembly. The buckle engages and releases the engagement along a movement path close to and away from the plane where the tissue binding surface on the mounting base is located. as claimed 17 The stapler is characterized in that the engaging part is configured as a engaging groove, and the engaging groove includes a positioning part and a guide part, and the guide part is used to guide the engaging part of the free end of the engaging element to be inserted into or Detach from the positioning part. 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 mounting base has a tissue binding surface for contacting with tissue; a nail pusher, which is movably arranged on the mounting base; and A cutting knife, the cutting knife is connected to the mounting base, the pusher member and the cutting knife are movable between the proximal end and the distal end of the mounting base; and 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 achieve the connection with the buckle of the transmission mechanism. Detaching and detaching. as claimed 19 The nail cartridge assembly is characterized in that the connecting end of the buckle is connected to the cutting knife. as claimed 19 The nail cartridge assembly is characterized in that the cutting knife and the fastener are an integrated structure. as claimed 19 The nail cartridge assembly is characterized in that the connecting end of the buckle is connected to the nail pusher. as claimed 19 The nail cartridge assembly is characterized in that the nail pusher and the buckle are of an integrated structure. as claimed 19 The nail cartridge assembly is characterized in that at least part of the buckle has an elastic structure, the first jaw has a buckling guide surface, and the transmission mechanism drives the nail pusher and the cutting blade along the clip. When the connecting guide surface moves toward the distal end of the actuator assembly, the clamping guide surface conflicts with the buckle piece, so that the buckle piece deforms and drives the free end of the buckle piece closer to the installation The plane where the tissue binding surface on the seat is located moves to achieve snap-in connection with the snap-in part; the transmission mechanism drives the nail pusher and the cutting knife to face the proximal end of the actuator assembly along the snap-in guide. When moving, the buckle recovers its deformation under the elastic restoring force of the elastic structure, and drives the free end of the buckle to move away from the plane where the tissue bonding surface on the mounting base is located, so as to achieve connection with the buckle. Partially release the card connection. as claimed twenty four The nail cartridge assembly is characterized in that the entire buckle is made of elastic material. as claimed 19 The nail cartridge assembly is characterized in that the proximal end of the mounting base has a detachment guide surface, and one end of the buckle facing the transmission mechanism has a buckling portion, and the transmission mechanism drives the push nail. When the component and the cutting knife move toward the proximal end of the actuator assembly, the disengagement guide surface conflicts with the buckle part to drive the buckle part to disengage from the buckle part of the transmission mechanism. as claimed 19 The nail cartridge assembly is characterized in that the free end of the buckle moves closer to and away from the plane where the tissue joining surface is located in a direction perpendicular to the tissue joining surface. as claimed 19 The nail cartridge assembly is characterized in that the mounting base has a movable cavity arranged along the axial direction, and the nail pusher and the cutting knife are movably arranged in the movable cavity. as claimed 28 The nail cartridge assembly is characterized in that the mounting seat has a supporting portion located on a side of the movable cavity away from the mounting position for supporting the nail pushing member and the cutting knife. as claimed 28 The nail cartridge assembly is characterized in that the proximal end of the mounting base has a limiting portion, and the limiting portion is used to prevent the nail pushing member and the cutting knife from detaching from the proximal end of the mounting base. Active cavity. A stapler, 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; and 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 achieve closing and opening; an installation cavity for installing the nail cartridge assembly is formed between the first jaw and the second jaw, and the transmission mechanism Extending into the mounting cavity; the drive mechanism nail pushing member and the cutting blade move between the proximal end and the distal end of the mounting base; and The buckle has a connecting end and a free end, and the connecting end of the buckle is arranged on the transmission mechanism; the free end of the buckle can be close to and away from the tissue joint surface on the mounting base. Planar movement to achieve engagement and release of engagement with the engagement portion of the nail cartridge assembly. as claimed 31 The stapler is characterized in that the connecting end of the buckle is connected to the distal end of the transmission mechanism. as claimed 31 The stapler is characterized in that the buckle and the transmission mechanism are of an integrated structure. 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 mounting base has a tissue binding surface for contacting with tissue; a nail pusher, which is movably arranged on the mounting base; and A cutting knife, the cutting knife is connected to the mounting base, the pusher member and the cutting knife are movable between the proximal end and the distal end of the mounting base; and The clamping part is provided on the nail pusher or the cutting knife. The clamping part is used to move with the clamping part of the stapler along a plane close to and away from the tissue joining surface on the mounting base. Path carding and unbuckling. as claimed 34 The nail cartridge assembly is characterized in that the clamping part is connected to the cutting knife. as claimed 34 The nail cartridge assembly is characterized in that the clamping part and the cutting blade are of an integrated structure. as claimed 34 The nail cartridge assembly is characterized in that the clamping portion is connected to the nail pusher. as claimed 34 The nail cartridge assembly is characterized in that the clamping portion and the nail pushing member are of an integrated structure.