CN219207114U - Nail bin assembly and surgical anastomat - Google Patents

Abstract

The application provides a nail storehouse subassembly and surgical stapler, nail storehouse subassembly includes: a staple cartridge holder; at least one stop mechanism mounted to a proximal side of the cartridge housing and at least partially movable relative to the cartridge housing in a longitudinal direction of the stapler, the stop mechanism including a first stop; the firing mechanism comprises a second stop part; when the stopping mechanism is in a first state, the first stopping part is positioned on a path of the second stopping part moving towards the far end side, the firing mechanism cannot move towards the far end side beyond the stopping mechanism, so that false firing of the anastomat is avoided, when the stopping mechanism is driven to move at least partially along a first direction parallel to the longitudinal direction relative to the nail cartridge frame, the first stopping part is separated from the path of the second stopping part moving towards the far end side, and the stopping mechanism enters a second state, and can drive the firing mechanism to move towards the far end side at the moment, so that the anastomat can be fired normally.

Description

Nail bin assembly and surgical anastomat

Technical Field

The application relates to the technical field of medical instruments, in particular to a nail bin assembly and a surgical stapler.

Background

In the prior art, a surgical stapler comprises a stapler body, an operating handle movably connected with the stapler body, and a nail head matched with the stapler body. The inside of the anastomat body is provided with a transmission mechanism. The head includes oppositely disposed cartridge and anvil assemblies and a cutter movable in the head. In the operation process, tissues are placed between an anvil of an anvil assembly and a staple cartridge of a staple cartridge assembly, the distance between the anvil and the staple cartridge is adjusted to gradually clamp the tissues, then an operation handle is held, a cutter is driven to move towards the distal side by a transmission mechanism, and the cutter drives a firing block to move so that the staples are pushed out and formed on the anvil, and meanwhile, the cutter cuts the tissues to complete anastomosis and cutting of the tissues.

After one firing, the existing anastomat has all the anastomat nails in the nail bin are nailed on the tissues, and the nail bin needs to be replaced to perform the next firing. At this time, if the doctor holds the operation handle again due to unskilled or careless, the cutter is driven to move in the distal direction again by the transmission mechanism, and only the tissue is cut without suturing, resulting in failure of the operation. Therefore, it is desirable to provide a structure that avoids a secondary false firing after one firing of the stapler without replacing the staple cartridge.

Disclosure of Invention

An object of the present application is to provide a cartridge assembly and a surgical stapler, wherein the cartridge assembly and the surgical stapler can move at least partially in a longitudinal direction relative to a cartridge frame, and the stop mechanism can stop the firing mechanism from moving in a distal direction when in a first state, so that the erroneous firing of the stapler is avoided, and the stop mechanism can be driven to stop the firing mechanism when moving in a first direction parallel to the longitudinal direction relative to the cartridge frame, so that the stapler can be fired normally.

Embodiments of the present application provide a staple cartridge assembly comprising:

a staple cartridge holder;

at least one stop mechanism mounted to a proximal side of the cartridge housing and at least partially movable relative to the cartridge housing in a longitudinal direction of the stapler, the stop mechanism including a first stop;

the firing mechanism comprises a second stop part;

the first stop portion is located on a path along which the second stop portion moves in a distal direction when the stop mechanism is in the first state, the stop mechanism is driven to move at least partially relative to the cartridge frame in a first direction parallel to the longitudinal direction, the first stop portion is disengaged from the path along which the second stop portion moves in the distal direction, and the stop mechanism enters the second state.

In some embodiments, the cartridge bay includes a feed slot in which the firing mechanism is at least partially threaded;

each stop mechanism comprises a stop piece, the stop piece comprises the first stop part, and the stop piece is positioned on one side of the feed groove.

In some embodiments, the second stop of the firing mechanism protrudes outside the bottom wall of the cartridge frame, the first direction being a direction from the bottom wall of the cartridge frame toward the interior of the cartridge frame;

when the stop mechanism is in the first state, the stop piece is positioned at a first position, and the first stop part at least partially protrudes out of the outer side of the bottom wall of the nail bin frame; when the stop mechanism enters the second state from the first state, the stop piece moves along the first direction to reach a second position, and the lowest point height of the first stop part is higher than the highest point height of the second stop part.

In some embodiments, the first driver includes a first driver that drives the stop mechanism to move in the first direction and the stop mechanism enters the second state when the stop mechanism is in the first state and the first driver is on the proximal side of the cartridge housing.

In some embodiments, each of the stop mechanisms further includes a second driver located on a distal side of the stop, the second driver including a second driver and a third driver;

when the stopping mechanism is in the first state and the first driving part is positioned at the proximal end side of the nail cartridge frame, the first driving part drives the second driving part to enable the second driving part to move towards the proximal end side, and the third driving part drives the stopping part to enable the stopping part to move along the first direction.

In some embodiments, the inner side of the bottom wall of the cartridge bay is provided with a mounting portion for mounting the second driver;

the driver includes a first arm, and the mounting portion includes a guide portion that cooperates with the first arm to define axial movement of the driver along the stapler.

In some embodiments, the mounting portion further comprises a receiving slot and a first stop portion, the driving member further comprises a second arm mounted to the receiving slot, and the first stop portion limits movement of the second arm in the longitudinal direction.

An opening is formed in one side, away from the bottom wall of the nail bin frame, of the accommodating groove, the transverse width of the opening is smaller than that of the second arm, and the transverse width of the opening is larger than or equal to the longitudinal height of the second arm.

In some embodiments, the proximal end of the third drive portion includes a sloped first guide surface and the stop includes a second guide surface opposite the first guide surface and sloped to drive the stop in the first direction when the third drive portion is moved in a proximal direction.

In some embodiments, the first driving portion protrudes from a proximal end of the first driving member, the proximal end of the first driving portion includes a fourth inclined guide surface, and the stopper includes a second inclined guide surface opposite to the first driving portion such that when the first driving portion moves in a proximal direction, the stopper is driven to move in the first direction.

In some embodiments, the stopper includes a fourth driving portion opposite the first driving portion, the fourth driving portion includes a first sub-driving portion including the second guide surface and a second sub-driving portion located on a lateral side of the first driving portion when the fourth guide surface abuts against the second guide surface.

In some embodiments, the stop mechanism further comprises a resilient member configured to apply a biasing force to the stop member that moves the stop member in a second direction, the second direction being opposite the first direction.

In some embodiments, the elastic member includes a first mating portion that abuts the stop, a second mating portion that abuts the cartridge frame, and a third mating portion that abuts the anvil assembly of the stapler when the cartridge assembly is closed relative to the anvil assembly, and the elastic member is configured to apply a biasing force to the cartridge assembly that biases it away from the anvil assembly.

In some embodiments, the inner side surface of the bottom wall of the cartridge rack further comprises a third limiting part, the stop piece further comprises a fourth limiting part, and when the stop mechanism is in the first state, the bottom surface of the fourth limiting part is propped against the third limiting part;

the first matching part of the elastic piece is propped against one side surface of the fourth limiting part, which is away from the bottom wall of the nail bin frame.

In some embodiments, the elastic element comprises a first matching part propped against the stop element, a second matching part propped against the nail cartridge frame and a fourth matching part oppositely arranged on the first driving part, the stop mechanism is in the first state, when the first driving element is positioned at the proximal end side of the nail cartridge frame, the first driving part drives the fourth matching part, and the stop element is driven by the elastic element to move along the first direction, and the stop mechanism enters the second state.

In some embodiments, at least one side of the feed slot is provided with a mounting hole, the stop piece is arranged in the mounting hole in a penetrating way, and the distal end side and/or the proximal end side of the mounting hole are respectively provided with a second limiting part; and/or the number of the groups of groups,

the inner side surface of the bottom wall of the nail bin frame further comprises a third limiting part, the stop piece further comprises a fourth limiting part, and when the stop mechanism is in the first state, the bottom surface of the fourth limiting part abuts against the third limiting part.

In some embodiments, the distal end of the first stop includes an angled third guide surface, and when the firing mechanism moves from the distal end side of the stop to the proximal end side, the firing mechanism drives the stop in the first direction, causing the stop to move from the first position to the second position.

The embodiment of the application also provides a surgical stapler comprising the nail bin assembly.

The nail bin assembly and the surgical stapler provided by the application have the following advantages:

the application provides a stop mechanism that can be at least partly for the nail storehouse frame along longitudinal movement, stop mechanism is in the first state stop firing mechanism moves to distal end side direction, even give firing mechanism one and move towards distal end side direction's drive power this moment, firing mechanism still can't cross stop mechanism and move to distal end side direction to avoid the mistake of anastomat to fire, stop mechanism is driven and when moving and entering the second state along being on a parallel with longitudinal first direction for the nail storehouse frame, stop mechanism no longer stops firing mechanism, can drive firing mechanism and move to distal end side direction this moment, thereby can normally fire the anastomat.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

FIG. 1 is a schematic view of the structure of a nail head according to a first embodiment of the present application;

FIG. 2 is a schematic structural view of a staple cartridge assembly of a first embodiment of the present application;

FIG. 3 is a partial schematic view of a staple cartridge assembly of a first embodiment of the present application;

FIGS. 4 and 5 are partial schematic views of a cartridge assembly of a first embodiment of the present application omitting a cartridge;

FIGS. 6 and 7 are partial schematic views of a cartridge bay of a first embodiment of the present application;

fig. 8 is a schematic structural view of a second driving member according to the first embodiment of the present application;

FIG. 9 is a schematic illustration of the second driver of the first embodiment of the present application as installed;

FIG. 10 is a front view of the stop mechanism of the first embodiment of the present application in a first state engaged with a cutter;

FIG. 11 is a perspective view of the stop mechanism of the first embodiment of the present application in a first state engaged with a cutter;

FIG. 12 is a schematic view of the cooperation of the stopper and the elastic member of the first embodiment of the present application;

FIG. 13 is a schematic illustration of the first and second drive members of the first embodiment of the present application mated;

Figure 14 is a front view of the stop mechanism of the first embodiment of the present application in a second state engaged with a cutter;

figure 15 is a front view of the stop mechanism of the second embodiment of the present application in a first state engaged with a cutter;

figure 16 is a front view of the stop mechanism of the second embodiment of the present application in a second state engaged with a cutter;

FIG. 17 is a schematic view of the stop mechanism of the third embodiment of the present application in a first state engaged with a cutter;

fig. 18 is a front view of the stop mechanism of the third embodiment of the present application in a first state engaged with a cutter;

figure 19 is a front view of the stop mechanism of the third embodiment of the present application in a second state engaged with a cutter;

fig. 20 is a front view of a first driver of a fourth embodiment of the present application;

figure 21 is a front view of the stop mechanism of the fourth embodiment of the present application in a second state engaged with a cutter;

fig. 22 is a schematic structural view of a first driving member of a fourth embodiment of the present application;

figure 23 is a front view of the stop mechanism of the fifth embodiment of the present application in a second state engaged with a cutter;

FIG. 24 is a schematic view of a stop member and resilient member of a sixth embodiment of the present application;

FIG. 25 is a schematic view of a stop mechanism according to a seventh embodiment of the present application mated with a first drive member and a cutter;

FIG. 26 is a schematic view of the engagement of the stop mechanism and the first driver of the eighth embodiment of the present application;

fig. 27 is a schematic structural view of a stopper of an eighth embodiment of the present application.

Reference numerals:

1. cartridge assembly 52 stop

11. Fourth driving part of nail cabin 521

12. Second guide surface of cartridge bay 5211

121. First sub-driving part of mounting part 5212

1211. Accommodating groove 5213 second sub-driving part

1212. First stop of guide 522

1213. Third guide surface of first stopper 5221

1214. Fourth limit part of opening 523

122. Fifth limit part of mounting hole 524

123. Second limiting part 53 elastic piece (examples 1 and 4)

124. First matching part of feed groove 531

125. Second fitting portion of elastic member fixing portion 532

126. Third spacing portion 54 elastic member (examples 2, 5, 6)

2. First mating portion of anvil assembly 541

3. Second mating portion of connector 542

4. Third matching part of first driving piece 543

41. First drive portion 55 elastic member (example 3)

411. The fourth guiding surface 551 is a first mating portion

5. Second mating portion of stop mechanism 552

51. Fourth mating portion of second driving piece 554

511. First arm 6 cutter

5111. Second drive portion 61 first beam

512. Third drive part 62 connection part

5121. First guide surface 63 second beam

513. Second arm 631 second stop

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. "or", "or" in the specification may each mean "and" or ". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe various example features and elements of the present application, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure to fall within the scope of this application. Although the terms "first" or "second" etc. may be used herein to describe certain features, these features should be interpreted in a descriptive sense only and not for purposes of limitation as to the number and importance of the particular features.

The application provides a nail bin assembly and a surgical anastomat. The anastomat comprises an anastomat body, an operating handle and a nail head part, wherein the nail head part comprises a nail bin assembly and a nail anvil assembly which are oppositely arranged. The cartridge assembly includes: a staple cartridge holder; at least one stop mechanism mounted to a proximal side of the cartridge housing and at least partially movable relative to the cartridge housing in a longitudinal direction of the stapler, the stop mechanism including a first stop; the firing mechanism comprises a second stop part; when the stopping mechanism is in a first state, the first stopping part is positioned on a path of the second stopping part moving towards the far-end side direction, the firing mechanism cannot move towards the far-end side direction beyond the stopping mechanism, so that false firing of the anastomat is avoided, when the stopping mechanism is driven to move at least partially along a first direction parallel to the longitudinal direction relative to the nail cartridge frame, the first stopping part is separated from the path of the second stopping part moving towards the far-end side direction, and the stopping mechanism enters a second state, and can drive the firing mechanism to move towards the far-end side direction at the moment, so that the anastomat can be fired normally.

The structure of the cartridge assembly of the various embodiments of the present application will be described in detail below with reference to the accompanying drawings, it being understood that the various embodiments are not limiting of the scope of the present application.

Fig. 1 to 14 show the structure of a cartridge assembly 1 according to a first embodiment of the present application. As shown in fig. 1, the cartridge assembly 1 is disposed opposite to the anvil assembly 2, and a jaw is formed between the cartridge assembly 1 and the anvil assembly 2, which are rotatably connected by a connector 3 on a proximal end side, so that the cartridge assembly 1 and the anvil assembly 2 have two states of opening and closing the jaw. As shown in fig. 2 to 4, the cartridge assembly 1 includes a cartridge housing 12, a cartridge 11 positioned inside the cartridge housing 12, and a firing mechanism. The cartridge holder 12 includes a bottom wall and two side walls on both sides, and the bottom wall of the cartridge holder 12 is provided with a feed slot 124 extending in the axial direction of the stapler. In this embodiment, the firing mechanism includes a cutter 6. The cutter 6 includes a first beam 61, a connecting portion 62 (fig. 10), and a second beam 63, which are disposed in this order from top to bottom. The connecting portion 62 is at least partially disposed through the feed slot 124, and the second cross member 63 protrudes outside the bottom wall of the cartridge frame 12. The cutter 6 is movable in the extending direction of the feed groove 124.

In the present application, the distal side and the proximal side are the proximal side with respect to the operator, the side closer to the operator, the side farther from the operator, i.e. the side closer to the surgical site, the distal side, the direction along the axis of the stapler being the axial direction, i.e. the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. In fig. 1, the S0 direction is the axial direction of the stapler. The direction S1 in fig. 1 is defined as a direction from the distal end side to the proximal end side, and the direction S1 or a direction opposite to S1 is defined as an axial direction. The S2 direction in fig. 7 is defined as the lateral direction, i.e., the width direction. The S3 direction in fig. 10 is defined as the longitudinal direction, i.e., the height direction. The S3 direction is a first direction, i.e., a direction from bottom to top in the view of fig. 10, and the direction opposite to S3 is a second direction, i.e., a direction from top to bottom in the view of fig. 10. For one component, the inner side and the outer side are the inner side with respect to the axis S0 of the stapler, and the side far from the axis S0 is the outer side.

As shown in fig. 4, the cartridge assembly 1 further comprises at least one stop mechanism 5 mounted to the proximal side of the cartridge housing 12. In this embodiment, a stop mechanism 5 is provided on each side of the feed slot 124. In other embodiments, only one stop mechanism 5 may be provided on one side of the feed slot 124. The stop mechanism 5 comprises a stop 52, the stop 52 being movable relative to the cartridge frame 12 in the longitudinal direction of the stapler, the stop 52 comprising a first stop 522. The second cross member 63 of the cutter 6 forms a second stop.

The stop mechanism 5 is switchable between a first state and a second state, such that the stop 52 is movable in the longitudinal direction between a first position and a second position. As shown in fig. 10, when the stopping mechanism 5 is in the first state, the stopping member 52 is in a first position relatively lower, the first stopping portion 522 protrudes from the outer surface of the bottom wall of the cartridge frame 12, the first stopping portion 522 is located on the path of the second beam 63 moving in the distal direction, at this time, if the operating handle is held, a driving force is given to the cutter 6 moving in the distal direction, and under the blocking action of the first stopping portion 522, the cutter 6 cannot move in the distal direction, so that the stapler cannot be fired, and false firing when the firing condition of the stapler is not satisfied is effectively avoided.

When the stapler is driven to move to a second position relatively upward relative to the cartridge frame 12 in the first direction after the firing condition is satisfied, the first stopper 522 is lifted up to at least partially enter the inside of the cartridge frame 12, so that the lowest point height of the first stopper 522 is higher than the highest point height of the second cross member 63, the first stopper 522 is separated from the path of the movement of the second cross member 63 in the distal direction, and the stopper mechanism 5 enters the second state shown in fig. 14. At this time, if the operation handle is held, the cutter 6 is driven to move in the distal direction to fire the stapler. The first direction is a direction from the bottom wall of the cartridge holder 12 toward the inside of the cartridge holder 12, and corresponds to the telescopic movement of the stopper 52 with respect to the cartridge holder 12.

As shown in fig. 7 and 11, at least one side of the feed slot 124 is provided with a mounting hole 122, the stop member 52 is disposed in the mounting hole 122 in a penetrating manner, and the distal end side and the proximal end side of the mounting hole 122 are respectively provided with a second limiting portion 123, so as to limit the stop member 52 to have a smaller movable range in the axial direction. The inner side surface of the bottom wall of the cartridge frame 12 further includes a third limit portion 126, the stop member 52 further includes a fourth limit portion 523, and the fourth limit portion 523 is a boss disposed on the stop member 52. When the stop mechanism 5 is in the first state, the stop member 52 is in the first position, and the bottom surface of the fourth limiting portion 523 abuts against the third limiting portion 126, so as to prevent the stop member 52 from falling off the cartridge holder 12 in the first state.

In this embodiment, the switching of the stop mechanism 5 from the first state to the second state is effected by the driving of the first driver 4. As shown in fig. 13, the first driving member 4 is a firing block provided in the staple cartridge 11, and a first driving portion 41 is provided at a proximal end of the first driving member 4. The stop mechanism 5 further comprises a second driver 51, the second driver 51 comprising a second driver 5111 opposite the first driver 41 and a third driver 512 opposite the stop 52. The stop 52 includes a fourth drive 521 opposite the third drive 512, the fourth drive 521 being located inside the cartridge bay 12. The second driving member 51 is mounted to a mounting portion 121 on the inner side of the bottom wall of the cartridge frame 12, and is movable relative to the cartridge frame 12 in the axial direction of the stapler. When the stop mechanism 5 is in the first state and the first driver 4 is located at the proximal end side of the cartridge holder 12, the first driver 41 drives the second driver 5111 to move the second driver 51 in the axial direction toward the proximal end side, and the third driver 512 drives the fourth driver 521 of the stop member 52 to move the stop member 52 in the first direction, that is, the second driver 51 lifts the stop member 52 upward.

As shown in fig. 4 to 9, the second driving member 51 includes a first arm 511 and a second arm 513, the first arm 511 extends substantially in the longitudinal direction, the second arm 513 extends substantially in the axial direction, the first arm 511 is disposed toward the first driving member 4, a portion of the first arm 511 opposite to the first driving portion 41 forms a second driving portion 5111, the second arm 513 is disposed toward the stopper 52, and a proximal portion of the second arm 513 forms a third driving portion 512. The mounting portion 121 includes a receiving groove 1211, a guide portion 1212, and a first stopper portion 1213. The guide portion 1212 is a groove extending along the axial direction, and the end portion of the first arm 511 is embedded in the groove and can be limited by the groove to move along the axial direction of the anastomat. The second driving member 51 is movable between a third position and a fourth position when the first arm 511 moves along the groove, the third position being located on the distal side of the fourth position. An opening 1214 is provided at the upper end of the receiving groove 1211. The first limiting portion 1213 is two side arms of the upper opening 1214 of the receiving slot 1211. As shown in fig. 6 and 7, the lateral width a1 of the opening 1214 is smaller than the lateral width a2 of the second arm 513, so that the second arm 513 is blocked from moving in the longitudinal direction by the first stopper 1213 after being mounted in the receiving groove 1211. The receiving groove 1211 may be provided as a circular hole having no opening at an upper end, and an upper wall of the circular hole may serve as a first stopper portion, and may also restrict the movement of the second arm 513 in the longitudinal direction.

As shown in fig. 7 and 8, the lateral width a1 of the opening 1214 is greater than or equal to the longitudinal height a3 of the second arm 513, so that the stopper 52 can be easily mounted to the mounting part 121. The lateral and longitudinal directions of the stopper 52 refer to directions of the stopper 52 in the use state as shown in fig. 5, and the stopper 52 is disposed vertically as a whole in the use state. Fig. 9 shows a process of mounting the stopper 52 on the mounting portion 121, first, the stopper 52 is turned to be placed horizontally, after the second arm 513 of the stopper 52 is turned, the longitudinal edge of the stopper 52 is aligned with the opening 1214, and since the longitudinal height a3 of the stopper 52 is smaller than the lateral width a1 of the opening 1214, the second arm 513 may be placed in the receiving groove 1211, and then the stopper 52 is turned to be placed vertically again, so that the end of the first arm 511 enters the guide portion 1212, and the mounting of the stopper 52 is completed.

As shown in fig. 8 to 14, the distal end of the second driving part 5111 and the proximal end of the first driving part 41 are respectively substantially vertical surfaces, so that the second driving part 5111 is driven to move in the proximal direction when the first driving member 4 is moved in the proximal direction. The proximal end of the third driving part 512 includes a first inclined guiding surface 5121, and the stopper 52 includes a second inclined guiding surface 5211 opposite to the first guiding surface 5121, so that the stopper 52 is driven to move in the first direction when the third driving part 512 moves in the proximal direction. Thus, when the cartridge 11 is loaded in the cartridge holder 12, the first driver 4 at the proximal end of the cartridge 11 drives the second driver 51 in the proximal direction from the third position to the fourth position, and the second driver 51 lifts the stopper 52, moving the stopper 52 from the first position to the second position, so that the stopper mechanism 5 enters the second state. Thus, when the stopper mechanism 5 is in the first state, the second driver 51 is in the third position, the stopper 52 is in the first position, the first stopper 522 is located on the path of the distal movement of the second beam 63 of the cutter 6, and when the stopper mechanism 5 is in the second state, the second driver 51 is in the fourth position, the stopper 52 is in the second position, and the first stopper 522 is located above the path of the distal movement of the second beam 63.

As shown in fig. 7, 11 and 12, the stop mechanism 5 further includes an elastic member 53, and the elastic member 53 is configured to apply a biasing force to the stop member 52 to move in a second direction, which is opposite to the first direction. In this embodiment, the elastic member 53 is a spring plate, the elastic member 53 includes a first mating portion 531 connected to the stopper 52 and a second mating portion 532 connected to the cartridge frame 12, and the inner surface of the bottom wall of the cartridge frame 12 is provided with an elastic member fixing portion 125 connected to the second mating portion 532. In other alternative embodiments, the elastic member 53 may be a tension spring, a compression spring, an elastic pad, or other elastic structures.

The working principle of the stop mechanism 5 in this embodiment will be described in detail with reference to fig. 3 to 14.

As shown in fig. 3 to 5 and 10, when no cartridge 11 is mounted in the cartridge holder 12, the stopper mechanism 5 is in a first state, wherein the stopper 52 is in a first position under the biasing force of the elastic member 53, the first stopper 522 protrudes at least partially outside the bottom wall of the cartridge holder 12, the first stopper 522 is located on the distal side of the second beam 63 of the cutter 6 and on the path of movement of the second beam 63 in the distal direction, and the fourth driving portion 521 presses the third driving portion 512 to hold the second driving member 51 in a third position. After the staple cartridge 11 is loaded into the staple cartridge holder 12, the first driving member 4 at the proximal end of the staple cartridge 11 drives the second driving member 51 to move from the third position to the fourth position in the proximal direction, the second driving member 51 drives the stopper 52 to move upward, the stopper 52 drives the elastic member 53 to elastically deform, the stopper 52 moves upward to the second position, the first stopper 522 no longer blocks the path of the movement of the second beam 63 in the distal direction, and the stopper mechanism 5 enters the second state as shown in fig. 14. At this time, if the operation handle is held, the cutter 6 is driven to move in the distal direction, and the cutter 6 passes over the stopper mechanism 5 to reach the distal side of the cartridge 11, thereby completing the firing of the stapler. After the second driver 51 loses the force of the first driver 4, the stopper 52 moves downward in the second direction under the elastic deformation restoring force of the elastic member 53 to return to the first position, so that the first stopper 522 returns again to the axial movement path of the second cross member 63, and the fourth driver 521 of the stopper 52 drives the third driver 512 of the second driver 51 under the action between the first guide surface 5121 and the second guide surface 5211, so that the second driver 51 returns again from the fourth position to the third position, and the stopper mechanism 5 returns again to the first state.

As shown in fig. 10, the distal end of the first stop 522 includes an angled third guide surface 5221. After the stapler is fired, the cutter 6 is returned to the proximal side of the cartridge frame 12 by the reset mechanism, and the first driver 4 is left at the distal end of the cartridge 11. When the cutter 6 moves to the proximal direction of the cartridge frame 12 until the second cross member 63 abuts against the third guide surface 5221, the second cross member 63 drives the third guide surface 5221 in the proximal direction, the stopper 52 is lifted up again, the stopper 52 moves from the first position to the second position, the first stopper 522 moves above the path along which the second cross member 63 moves in the axial direction, the elastic member 53 is driven again to elastically deform, and the cutter 6 can return to the proximal side of the stopper mechanism 5. After the second beam 63 of the cutter 6 no longer abuts against the third guide surface 5221, the stopper 52 moves downward to the first position under the elastic deformation restoring force of the elastic member 53, the first stopper 522 moves again to the path along which the second beam 63 moves in the distal direction, and the stopper mechanism 5 is in the first state as shown in fig. 10. At this time, if the operating handle is not carefully held again, even if a force is applied to the cutter 6 to move in the distal direction, the cutter 6 cannot move in the distal direction beyond the stop mechanism 5 under the blocking action of the first stop portion 522 on the second cross member 63, and thus the stapler cannot be fired, so that the secondary false firing when the staple cartridge 11 is not replaced after the firing of the stapler is avoided.

Fig. 15 and 16 show a structure in which the stopper mechanism 5 and the cutter 6 of the second embodiment of the present application are engaged. Wherein fig. 15 shows the cooperation of the stop mechanism 5 with the cutter 6 in the first state. Figure 16 shows the cooperation of the stop mechanism 5 with the cutter 6 in the second state. In this embodiment, an elastic member 54 is provided, the elastic member 54 includes a first mating portion 541 and a second mating portion 542, the first mating portion 541 is connected to the stopper 52, the second mating portion 542 is connected to the cartridge frame 12, and the elastic member 54 applies a biasing force to the stopper 52 to move in the second direction. Therefore, the elastic member 54 can drive the stopper 52 to move along the second direction after the firing of the stapler is completed, so that the stopper 5 reaches the first position, the stopper mechanism 5 returns to the first state, and the first stopper 522 blocks the path along which the cutter 6 moves in the distal direction.

After the anastomat is completely fired, when the cutter 6 moves towards the proximal side under the action of the reset mechanism, the jaw of the anastomat is opened again to release tissues. However, in the conventional anastomat, an unsmooth opening of the jaw may occur. The elastic member 54 of this embodiment is different from the elastic member 54 of the first embodiment in that: the elastic member 54 further includes a third mating portion 543, wherein when the cartridge assembly 1 is closed relative to the anvil assembly 2 of the stapler, the third mating portion 543 abuts against the anvil assembly 2, and the elastic member 54 is configured to apply a biasing force to the cartridge assembly 1 away from the anvil assembly 2. When the jaw of the nail head of the anastomat is opened, the nail bin assembly 1 is far away from the nail anvil assembly 2, and the jaw of the nail head is gradually closed by driving the cutter 6 to move towards the distal end side, the nail bin assembly 1 rotates to gradually approach the nail anvil assembly 2 or the nail anvil assembly 5 rotates to gradually approach the nail bin assembly 1, after the jaw of the nail head is closed, the second matching part 542 and the third matching part 543 respectively prop against the nail bin assembly 1 and the nail anvil assembly 2, and the elastic piece 54 is elastically deformed to a certain degree. After the anastomat is completely fired, the jaw is more easily opened under the abutting action of the second matching part 542 and the third matching part 543 and the elastic deformation restoring force of the elastic piece 54. The elastic member 54 is provided at a non-anastomotic portion (i.e., a portion where no staples are provided at the proximal end) of the cartridge module 1, and when the jaws of the head are opened, the elastic member 54 is stopped to prevent tissue from entering the non-anastomotic portion. In addition, after the first driver 4 moves to the distal end of the cartridge assembly 1 and the jaws of the stapler are closed again, due to the pressing action of the anvil assembly 2 on the elastic member 54, the elastic member 54 is elastically deformed to a certain extent, so that the biasing force of the first mating portion 541 of the elastic member 54 acting on the stopper 52 is increased, which is more beneficial to keep the first stopper 522 in a position blocking the second beam 63, and keep the stopper 52 in the first position more stably.

Fig. 17 to 19 show the structure in which the stopper mechanism 5 and the cutter 6 of the third embodiment of the present application are engaged. This embodiment differs from the first embodiment in that: the stopper 52 is not provided with the fourth driving portion 521. The elastic member 55 includes a fourth engagement portion 554 provided opposite to the first driving portion 41, in addition to the first engagement portion 551 and the second engagement portion 552. Fig. 18 shows a configuration in which the stopper mechanism 5 is engaged with the cutter 6 in the first state. When the stop mechanism 5 is in the first state and the first driving member 4 is located at the proximal end side of the cartridge holder 12, the first driving portion 41 drives the fourth engaging portion 554 to lift the fourth engaging portion 554 of the elastic member 55 upward, and the elastic member 55 further drives the stop member 52 to move from the first position to the second position along the first direction, and the stop mechanism 5 enters the second state shown in fig. 19.

In this third embodiment, the first driving portion 41 of the first driving member 4 is directly in abutting engagement with the fourth engagement portion 554. In a further alternative embodiment, a second drive element 51 as described in the first example can also be provided between the first drive element 4 and the fourth mating part 554. When the stopping mechanism 5 is in the first state and the first driving member 4 is located at the proximal end side of the cartridge frame 12, the first driving member 4 drives the second driving member 51 to move in the proximal end side direction, the third driving portion 512 of the second driving member 51 abuts against the fourth engaging portion 554 of the elastic member 55 and drives the fourth engaging portion 554 of the elastic member 55 to move upwards, so as to drive the stopping member 52 to move to the second position along the first direction, and the stopping mechanism 5 enters the second state. In yet another alternative embodiment, the elastic member 55 of the third embodiment may further comprise a third mating portion as in the second embodiment, wherein the third mating portion abuts against the anvil assembly 2 when the cartridge assembly 1 is closed relative to the anvil assembly 2 of the stapler, and wherein the elastic member 55 is configured to apply a biasing force to the cartridge assembly 1 away from the anvil assembly 2.

Fig. 20 to 22 show the structure of the stopper mechanism 5 according to the fourth embodiment of the present application. This embodiment differs from the first embodiment in that: the second driving member 51 is not provided, the first driving portion 41 protrudes from the proximal end of the first driving member 4, the proximal end of the first driving portion 41 includes a fourth inclined guiding surface 411, the stopper 52 includes a second inclined guiding surface 5211 opposite to the first driving portion 41, so that when the first driving portion 41 moves in the proximal direction, the stopper 52 is driven to move in the first direction by cooperation of the fourth guiding surface 411 and the second guiding surface 5211. Thus, when the stopper mechanism 5 is in the first state and the first driver 4 is located at the proximal end side of the cartridge holder 12, the first driver 41 directly drives the fourth driver 521 of the stopper 52, lifting the stopper 52 upward, moving the stopper 52 from the first position to the second position, and bringing the stopper mechanism 5 into the second state as shown in fig. 21.

In the first embodiment, compared with the fourth embodiment, a separate second driving portion 5111 is provided between the first driving member 4 and the stopper 52, so that the first driving portion 41 does not need to protrude from the proximal end of the first driving member 4, and accidental distal movement of the first driving member 4 due to accidental touching of the first driving portion 41 caused by the first driving portion 41 protruding from the proximal end of the first driving member 4 is avoided.

Fig. 23 shows the structure of the stopper mechanism 5 of the fifth embodiment of the present application. This embodiment differs from the first embodiment in that: the second driver 51 is not provided, the first driver 41 is disposed protruding from the proximal end of the first driver 4, the proximal end of the first driver 41 includes an inclined fourth guide surface 411, and the stopper 52 includes a second guide surface 5211 opposite to the first driver 41 and inclined so as to drive the stopper 52 to move in the first direction when the first driver 41 moves in the proximal direction; meanwhile, the elastic member 54 includes a first mating portion 541, a second mating portion 542, and a third mating portion 543, where the first mating portion 541 is connected to the stopper 52, the second mating portion 542 is connected to the cartridge frame 12, and the elastic member 54 applies a biasing force to the stopper 52 to move in the second direction. Thus, the elastic member 54 can drive the stopper 52 to move in the second direction after the completion of the firing of the stapler, so that the stopper mechanism 5 returns to the first state, and the first stopper 522 blocks the path along which the cutter 6 moves in the distal direction. When the cartridge assembly 1 is closed relative to the anvil assembly 2 of the stapler, the third fitting portion 543 abuts against the anvil assembly 2, and the elastic member 54 is configured to apply a biasing force to the cartridge assembly 1 away from the anvil assembly 2. The technical effects of the third mating portion are as described in the second embodiment, and are not described herein. The fifth embodiment may also be combined with the third embodiment, that is, a fourth mating portion is disposed at the distal end of the elastic member, where the function and technical effect of the fourth mating portion are as described in the third embodiment, and are not repeated herein.

Fig. 24 shows a schematic view of the cooperation of the stopper and the elastic member according to the sixth embodiment of the present application. The stopper structure of this embodiment may replace the stopper structure of the second or fifth embodiment described above, resulting in a new embodiment. The stopper of this embodiment differs from the stopper of the second and fifth embodiments in that: the first engaging portion 541 of the elastic member 54 abuts against the fourth limiting portion 523 of the stopper 52. Therefore, the fourth limiting portion 523 may cooperate with the elastic member 54 to enable the elastic member 54 to apply a downward biasing force to the stopper 52 while cooperating with the third limiting portion 126 to prevent the stopper 52 from falling out of the mounting hole 122. The stopper 52 of this embodiment has a simpler structure and is simpler and more convenient to produce. Further, when the first engaging portion 541 of the elastic member 54 abuts against the inner side of the fourth limiting portion 523, a fifth limiting portion 524 is further disposed on the inner side of the fourth limiting portion 523, so as to avoid the first engaging portion 541 of the elastic member 54 from being laterally offset with respect to the fourth limiting portion 523 and not abutting against the fourth limiting portion 523. In other alternative embodiments, the first engaging portion 541 of the elastic member 54 may also abut against an outer side or a proximal side upper surface of the fourth limiting portion 523.

Fig. 25 shows a structure in which a stopper mechanism of the seventh embodiment of the present application is engaged with a first driving portion. This embodiment differs from the fourth embodiment in that: the inclination angle of the fourth guiding surface 411 of the first driving portion 41 of the first driving member 4 is different, and the angle between the fourth guiding surface 411 and the bottom surface of the first driving portion 41 in the seventh embodiment is smaller than the angle between the fourth guiding surface 411 and the bottom surface of the first driving portion 41 in the fourth embodiment. In different embodiments, the angle between the fourth guiding surface 411 and the bottom surface of the first driving portion 41 may be selected to be different, for example, in the range of 0 ° to 90 °, preferably 15 ° to 70 °. The second guide surface 5211 of the stop 52 is substantially parallel to the fourth guide surface 411.

When the angle between the fourth guiding surface 411 and the bottom surface of the first driving portion 41 is small, the axial stroke of the first driving portion 41 is long and the state transition of the stopper 52 is long in the process that the stopper 52 is driven from the first state to the second state by the first driving portion 41, and the reaction force of the fourth driving portion 521 to the first driving portion 41 is small, so that the first driving member 4 does not move in the distal direction due to the reaction force of the fourth driving portion 521. When the angle between the fourth guiding surface 411 and the bottom surface of the first driving portion 41 is large, the axial stroke of the first driving portion 41 is short and the state transition of the stopper 52 is accelerated in the process that the stopper 52 is driven from the first state to the second state by the first driving portion 41, but the reaction force of the fourth driving portion 521 to the first driving portion 41 is large, and the first driving member 4 may tend to move in the distal direction due to the reaction force of the fourth driving portion 521. Therefore, an appropriate angle value may be selected according to actual needs, and the reaction force of the fourth driving portion 521 to the first driving portion 41 is not excessively large while satisfying that the stroke of the first driving portion 41 is not excessively long.

Fig. 26 and 27 show a structure in which the stopper mechanism of the eighth embodiment of the present application is engaged with the first driving portion, and one stopper 52 and one elastic member 54 are exemplarily shown in fig. 26. The stopper in this embodiment differs from the stopper of the sixth embodiment in that: the fourth driving portion 521 of the stopper 52 includes a first sub-driving portion 5212 and a second sub-driving portion 5213, and the first sub-driving portion 5212 includes a second guiding surface 5211, i.e., a surface that mates with the fourth guiding surface 411 of the first driving portion 41 of the first driver 4. And the second sub-driving part 5213 is a part having no inclined surface. When the first driving unit 41 abuts against the first sub driving unit 5212, the inner surface of the first driving unit 41 faces the side surface of the second sub driving unit 5213. The second sub-driving portion 5213 can prevent the first driver 4 and the fourth driving portion 521 from being displaced relative to each other in the lateral direction, and is advantageous for further improving the structural strength of the fourth driving portion 521. In this embodiment, the first sub-driving unit 5212 is located outside the second sub-driving unit 5213, and in another embodiment, the first sub-driving unit 5212 may be located inside the second sub-driving unit 5213. The stopper 52 of this embodiment replaces the stopper 52 of any of the first to seventh embodiments described above, resulting in a new embodiment. In the eighth embodiment, the first engaging portion 541 of the elastic member 54 abuts against the outer side of the fourth limiting portion 523. The mating structure of the elastic member 54 and the stopper 52 can also replace the corresponding structure in the second embodiment or the fifth embodiment, resulting in a new embodiment.

The foregoing is a further detailed description of the present application in connection with the specific preferred embodiments, and it is not intended that the practice of the present application be limited to such description. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims (18)

1. A staple cartridge assembly for a surgical stapler, the staple cartridge assembly comprising:

a staple cartridge holder;

at least one stop mechanism mounted to a proximal side of the cartridge housing and at least partially movable relative to the cartridge housing in a longitudinal direction of the stapler, the stop mechanism including a first stop;

the firing mechanism comprises a second stop part;

the first stop portion is located on a path along which the second stop portion moves in a distal direction when the stop mechanism is in the first state, the stop mechanism is driven to move at least partially relative to the cartridge frame in a first direction parallel to the longitudinal direction, the first stop portion is disengaged from the path along which the second stop portion moves in the distal direction, and the stop mechanism enters the second state.

2. The staple cartridge assembly of claim 1 wherein said staple cartridge frame comprises a feed slot, said firing mechanism being at least partially disposed through said feed slot;

each stop mechanism comprises a stop piece, the stop piece comprises the first stop part, and the stop piece is positioned on one side of the feed groove.

3. The staple cartridge assembly of claim 2 wherein the second stop of the firing mechanism protrudes outside of the bottom wall of the staple cartridge frame, the first direction being a direction from the bottom wall of the staple cartridge frame toward the interior of the staple cartridge frame;

when the stop mechanism is in the first state, the stop piece is positioned at a first position, and the first stop part at least partially protrudes out of the outer side of the bottom wall of the nail bin frame; when the stop mechanism enters the second state from the first state, the stop piece moves along the first direction to reach a second position, and the lowest point height of the first stop part is higher than the highest point height of the second stop part.

4. The staple cartridge assembly of claim 3, further comprising a first driver portion;

When the stop mechanism is in the first state and the first driving part is positioned at the proximal end side of the cartridge frame, the first driving part drives the stop mechanism to enable the stop member to move along the first direction, and the stop mechanism enters the second state.

5. The staple cartridge assembly of claim 4 wherein each of said stop mechanisms further comprises a second driver on a distal side of said stop, said second driver comprising a second driver and a third driver;

when the stopping mechanism is in the first state and the first driving part is positioned at the proximal end side of the nail cartridge frame, the first driving part drives the second driving part to enable the second driving part to move towards the proximal end side, and the third driving part drives the stopping part to enable the stopping part to move along the first direction.

6. The staple cartridge assembly of claim 5 wherein an inner side of a bottom wall of said staple cartridge frame is provided with a mounting portion for mounting said second driver;

the driver includes a first arm, and the mounting portion includes a guide portion that cooperates with the first arm to define axial movement of the driver along the stapler.

7. The staple cartridge assembly of claim 6 wherein said mounting portion further comprises a receiving slot and a first stop, said driver further comprises a second arm, said second arm is mounted to said receiving slot, and said first stop limits movement of said second arm in said longitudinal direction.

8. The staple cartridge assembly of claim 7 wherein a side of the receiving slot facing away from the bottom wall of the staple cartridge frame is provided with an opening having a lateral width that is less than a lateral width of the second arm and a lateral width that is greater than or equal to a longitudinal height of the second arm.

9. The staple cartridge assembly of claim 5 wherein the proximal end of the third drive portion comprises a sloped first guide surface and the stop comprises a sloped second guide surface opposite the first guide surface such that when the third drive portion is moved in a proximal direction, the stop is driven in the first direction.

10. The staple cartridge assembly of claim 4 wherein said first drive portion is disposed in a protruding proximal end of said first drive member, said proximal end of said first drive portion comprising an angled fourth guide surface, said stop member comprising a second guide surface opposite said first drive portion and angled such that when said first drive portion is moved in a proximal direction, said stop member is driven in said first direction.

11. The staple cartridge assembly of claim 10 wherein said stop comprises a fourth drive portion opposite said first drive portion, said fourth drive portion comprising a first sub-drive portion and a second sub-drive portion, said first sub-drive portion comprising said second guide surface, and said second sub-drive portion being located laterally to one side of said first drive portion when said fourth guide surface abuts said second guide surface.

12. The staple cartridge assembly of claim 4, wherein the stop mechanism further comprises a resilient member configured to apply a biasing force to the stop member that moves it in a second direction, the second direction being opposite the first direction.

13. The staple cartridge assembly of claim 12, wherein the resilient member comprises a first mating portion that abuts the stop member, a second mating portion that abuts the staple cartridge frame, and a third mating portion that abuts the anvil assembly of the stapler when the staple cartridge assembly is closed relative to the anvil assembly, and wherein the resilient member is configured to apply a biasing force to the staple cartridge assembly away from the anvil assembly.

14. The staple cartridge assembly of claim 13 wherein the bottom wall interior side of the staple cartridge frame further comprises a third stop portion, the stop further comprises a fourth stop portion, and wherein a bottom surface of the fourth stop portion abuts against the third stop portion when the stop mechanism is in the first state;

the first matching part of the elastic piece is propped against one side surface of the fourth limiting part, which is away from the bottom wall of the nail bin frame.

15. The staple cartridge assembly of claim 12 wherein said elastic member comprises a first mating portion that abuts said stop member, a second mating portion that abuts said staple cartridge frame, and a fourth mating portion that is disposed opposite said first driving portion, said stop mechanism being in said first state, and said first driving member being located on a proximal side of said staple cartridge frame, said first driving portion driving said fourth mating portion, and said stop member being driven by said elastic member to move in said first direction, said stop mechanism entering said second state.

16. The nail cartridge assembly according to claim 3, wherein at least one side of the feed groove is provided with a mounting hole, the stop piece is arranged in the mounting hole in a penetrating manner, and a distal end side and/or a proximal end side of the mounting hole are respectively provided with a second limiting part; and/or the number of the groups of groups,

The inner side surface of the bottom wall of the nail bin frame further comprises a third limiting part, the stop piece further comprises a fourth limiting part, and when the stop mechanism is in the first state, the bottom surface of the fourth limiting part abuts against the third limiting part.

17. The staple cartridge assembly of claim 3 wherein a distal end of the first stop comprises an angled third guide surface, the firing mechanism driving the stop in the first direction as the firing mechanism moves from the distal end side of the stop to the proximal side, causing the stop to move from the first position to the second position.

18. A surgical stapler comprising the cartridge assembly of any one of claims 1 to 17.

Images