CN216167631U - Nail bin assembly and medical anastomat - Google Patents

Abstract

The utility model provides a nail bin assembly and a medical anastomat, wherein the nail bin assembly comprises a nail bin and a firing block, the nail bin comprises at least one accommodating groove extending along the axial direction of the anastomat, the accommodating groove comprises a first proximal end part and a first distal end part, at least one side wall of the first proximal end part of the accommodating groove is provided with a first avoiding part, and at least one side wall of the first distal end part of the accommodating groove is provided with a second avoiding part. The firing block comprises at least one nail pushing part, the nail pushing part enters the accommodating groove, and the nail pushing part can move in the accommodating groove along the axial direction. When the firing block is positioned at the near end side of the nail bin, a first avoidance space is formed between the side wall of the accommodating groove, which is provided with a first avoidance part, and the nail pushing part; when the percussion block is located at the far end side of the nail bin, a second avoidance space is formed between the side wall provided with the second avoidance part and the nail pushing part of the accommodating groove. The nail bin assembly can be conveniently assembled and disassembled.

Description

Nail bin assembly and medical anastomat

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a nail bin assembly and a medical anastomat.

Background

The medical anastomat comprises a medical anastomat body, a firing handle movably connected with the medical anastomat body and a nail head matched with the medical anastomat body. The nail head comprises a nail bin assembly and a nail anvil which are oppositely arranged. During operation, the trigger handle is firstly held, the closing pull piece is pulled to move towards the near end side of the anastomat through the closing driving mechanism, so that after the nail bin assembly and the nail anvil are closed, the trigger handle is held again, the anastomotic nails can be pushed to move towards tissues, the tissues are anastomosed through the forming of the anastomotic nails in the nail bin assembly at the nail anvil, and meanwhile, the cutter moves towards the far end side to cut the tissues. In the present invention, the distal side and the proximal side are relative to the operator, and the end closer to the operator is the proximal side, and the end farther from the operator, i.e., the end closer to the surgical site is the distal side.

The nail bin assembly comprises a nail bin frame and a nail bin positioned in the nail bin frame, and the nail bin frame are detachable. When the nail bin is installed, the firing block is firstly placed on the near end side of the nail bin, the near end side of the nail bin is propped open outwards by the firing block due to the close fit with the firing block, so that the near end side of the nail bin transversely expands outwards to increase the width relative to the situation that the firing block is not installed, and the nail bin with the firing block installed is difficult to install in the nail bin frame and needs a large acting force. After the anastomat is fired, the firing block is located on the far end side of the nail bin, at the moment, the far end side of the nail bin is propped open outwards by the firing block due to the fact that the far end side of the nail bin is tightly matched with the firing block, the far end side of the nail bin transversely expands outwards to increase the width, and at the moment, the nail bin is difficult to take out of the nail bin frame. Therefore, the conventional magazine assembly has a problem that it is difficult to attach and detach the magazine assembly.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a nail bin assembly and a medical anastomat, and solves the problem that the nail bin assembly in the prior art is difficult to assemble and disassemble.

The embodiment of the utility model provides a nail bin assembly for a medical anastomat, which comprises: the nail bin comprises at least one accommodating groove extending along the axial direction of the anastomat, the accommodating groove comprises a first proximal end part and a first distal end part, at least one side wall of the first proximal end part of the accommodating groove is provided with a first avoiding part, and at least one side wall of the first distal end part of the accommodating groove is provided with a second avoiding part; and the firing block comprises at least one nail pushing part, the nail pushing part enters the accommodating groove, and the nail pushing part can move in the accommodating groove along the axial direction. When the firing block is positioned at the proximal end side of the nail bin, a first avoidance space is formed between the side wall of the accommodating groove, provided with the first avoidance part, and the nail pushing part; when the firing block is positioned at the far end side of the nail bin, a second avoidance space is formed between the side wall of the second avoidance part and the nail pushing part, wherein the second avoidance space is arranged in the accommodating groove.

In some embodiments, the first avoiding portion is a first groove, and the second avoiding portion is a second groove. When the firing block is positioned at the near end side of the nail bin, the projection of the nail pushing part on the plane where the first groove is positioned is completely positioned in the coverage range of the first groove; when the firing block is positioned at the far end side of the nail bin, the projection of the nail pushing part on the plane where the second groove is positioned is completely positioned in the coverage range of the second groove.

In some embodiments, the shape of the first groove is adapted to the shape of the side wall of the nail pushing portion, and the shape of the second groove is adapted to the shape of the side wall of the nail pushing portion.

In some embodiments, the receiving groove further includes a first connecting portion located between the first distal end portion and the first proximal end portion, and when the firing block is located at the first connecting portion, two side walls of the staple pushing portion respectively abut against two side walls of the first connecting portion.

In some embodiments, the outer sidewall of the first proximal portion of the receiving groove is formed with the first relief and the outer sidewall of the first distal portion of the receiving groove is formed with the second relief.

In some embodiments, the staple cartridge further comprises a knife path comprising a second distal end portion and a second proximal end portion, at least one sidewall of the second proximal end portion of the knife path being formed with a third relief, and at least one sidewall of the second distal end portion of the knife path being formed with a fourth relief. The firing block further comprises a guide portion entering the chute. When the firing block is positioned at the near end side of the nail bin, a third avoidance space is formed between the side wall of the cutter path provided with the third avoidance part and the guide part; when the firing block is positioned at the far end side of the nail bin, a fourth avoidance space is formed between the side wall of the walking groove, which is provided with the fourth avoidance part, and the guide part.

In some embodiments, the third avoiding portion is a third groove, and the fourth avoiding portion is a fourth groove. When the firing block is positioned at the proximal end side of the nail bin, the projection of the guide part on the plane where the third groove is positioned is completely positioned in the coverage range of the third groove; when the firing block is positioned at the far end side of the nail bin, the projection of the guide part on the plane where the fourth groove is positioned is completely positioned in the coverage range of the fourth groove.

In some embodiments, the third groove is shaped to conform to the shape of the side wall of the guide portion, and the fourth groove is shaped to conform to the shape of the side wall of the guide portion.

In some embodiments, both sidewalls of the second proximal end portion of the sipe are formed with the third relief portion, and both sidewalls of the second distal end portion of the sipe are formed with the fourth relief portion.

In some embodiments, the channel further comprises a second connecting portion between the second distal portion and the second proximal portion, wherein when the firing block is positioned at the second connecting portion, two sidewalls of the guide portion engage two sidewalls of the channel.

In some embodiments, the lateral width of the proximal side of the staple cartridge is less than the lateral width of the distal side of the staple cartridge.

In some embodiments, the staple cartridge further comprises a cartridge cover containing the staple cartridge, the cartridge cover comprises a bottom surface and two side walls, the two side walls of the cartridge cover are attached to the two outer side walls of the staple cartridge, and the lateral distance between the proximal ends of the two side walls of the cartridge cover is smaller than the lateral width of the distal ends of the two side walls of the cartridge cover.

The embodiment of the utility model also provides a medical anastomat which comprises the nail bin assembly.

The nail bin assembly and the medical anastomat provided by the utility model have the following advantages:

the utility model provides a nail bin assembly for a medical anastomat, which is characterized in that avoidance parts are additionally arranged on the near-end side and the far-end side of a nail bin, an avoidance space is formed between the near-end side and the far-end side of the nail bin and a firing block, the nail bin is not tightly matched with the firing block on the near-end side and the far-end side, and the transverse widths of the near-end side and the far-end side of the nail bin cannot be increased due to the matching of the nail bin and the firing block, so that the problem of difficulty in assembling and disassembling in the prior art is solved, the structure is simple, and the assembly and disassembly are easy.

Drawings

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

FIG. 1 is a schematic structural view of a staple cartridge assembly according to one embodiment of the present invention;

FIG. 2 is an exploded view of a staple cartridge assembly according to one embodiment of the present invention;

FIG. 3 is a top view of a staple cartridge assembly according to one embodiment of the present invention;

FIG. 4 is a sectional view taken in the direction of P1-P1 in FIG. 3;

FIG. 5 is a sectional view taken in the direction of P2-P2 in FIG. 3;

FIG. 6 is a schematic structural view of a staple cartridge assembly according to one embodiment of the present invention;

FIG. 7 is a right side view of a staple cartridge assembly of one embodiment of the present invention;

FIG. 8 is a front view of a staple cartridge assembly of one embodiment of the present invention;

FIG. 9 is a sectional view taken in the direction A1-A1 of FIG. 8;

FIG. 10 is a sectional view taken in the direction A2-A2 in FIG. 8.

Reference numerals:

1 the fourth escape part of the staple cartridge 182

11 proximal 19 trough of the magazine

12 distal end side 191 second proximal end of the staple cartridge

13 staple cartridge wall 192 second distal end

14 receiving groove 193 second connecting part

141 first proximal end 2 cartridge cover

142 first distal end 21 cartridge cover proximal side

143 first connection 22 staple cartridge cover distal side

15 first escape part 23 convex part

16 second avoiding part 3 firing block

17 nail hole 1731 nail pushing part

181 third escape part 32 guide part

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The utility model provides a nail bin assembly for a medical anastomat and the medical anastomat comprising the nail bin assembly. The medical anastomat comprises an anastomat head and an anastomat body, wherein the nail head is arranged on the far end side of the anastomat body, and the nail head comprises a nail bin assembly and a nail anvil arranged opposite to the nail bin assembly. The staple cartridge assembly includes a staple cartridge and a firing block. The nail storehouse includes at least one along the axially extending holding tank of anastomat, the holding tank includes first proximal end portion and first distal end portion, at least a lateral wall of the first proximal end portion of holding tank is provided with first dodge portion, at least a lateral wall of the first distal end portion of holding tank is provided with the second dodge portion. The firing block comprises at least one staple pushing portion, the staple pushing portion enters the accommodating groove, and the staple pushing portion can move axially in the accommodating groove. When the firing block is located on the proximal end side of the nail bin, a first avoidance space is formed between the side wall of the first avoidance part and the nail pushing part, wherein the first avoidance space is arranged in the accommodating groove. Therefore, the near end side of the nail bin is not tightly matched with the firing block, the near end side of the nail bin is not outwards spread due to the fact that the firing block is installed, and the difficulty that the nail bin is installed in the nail bin frame is not increased. When the firing block is positioned at the far end side of the nail bin, a second avoidance space is formed between the side wall of the second avoidance part and the nail pushing part, wherein the second avoidance space is arranged in the accommodating groove. Therefore, the distal end side of the nail bin is not tightly matched with the firing block, the proximal end side of the nail bin is not outwards spread due to the fact that the firing block is arranged in the nail bin, the difficulty that the nail bin is installed in the nail bin frame is not increased, and the nail bin assembly provided by the utility model has the advantages of being simple in structure and easy to assemble and disassemble.

The structure of the staple cartridge assembly according to the embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the embodiments are not intended to limit the scope of the present invention.

Fig. 1 to 10 show structural schematic views of a nail bin assembly according to an embodiment of the utility model. As shown in fig. 1 and 2, the cartridge assembly comprises a cartridge 1 and a firing block 3, wherein the firing block 3 at least partially enters the interior of the cartridge 1. The upper surface of the nail bin 1 is a nail bin surface, and a plurality of nail holes 17 are distributed on the nail bin surface. The cartridge 1 comprises a plurality of cartridge walls 13, the cartridge walls 13 defining at least one receiving slot 14, the receiving slot 14 for receiving staples. In this embodiment, two magazine walls 13 of the magazine 1 closest to the central axis define a channel 19 therebetween, and two receiving grooves 14 are respectively provided on both sides of the channel 19. In other alternative embodiments, the number and distribution of receiving slots 14 and the distribution of nail holes 17 may be different from that of the embodiment, for example, further increasing the number of receiving slots 14 or decreasing the number of receiving slots 14, and all fall within the protection scope of the present invention. As shown in fig. 2, the firing block 3 includes a staple pushing portion 31 corresponding to the receiving groove 14 and a guiding portion 32 corresponding to the knife channel 19. The staple pushing part 31 enters the corresponding receiving groove 14, the guiding part 32 enters the channel 19, the firing block 3 can move along the axial direction of the stapler, so that the staple pushing part 31 moves axially in the receiving groove 14, and the guiding part 32 moves axially in the channel 19.

In the present invention, the distal end side and the proximal end side are, with respect to the operator, the end closer to the operator is the proximal end side, the end farther from the operator, that is, the end closer to the surgical site is the distal end side, and the direction along the axial center of the stapler is the axial direction, that is, the direction from the distal end side to the proximal end side of the stapler, or the direction from the proximal end side to the distal end side of the stapler. For example, in the view of FIG. 1, proximal side 11 is the right side and distal side 12 is the left side for cartridge 1, and proximal side 21 is the right side and distal side 22 is the left side for cartridge cover 2. The direction S1 in fig. 1 is the direction from the distal side 12 to the proximal side 11 of the staple cartridge 1, the direction S1 and/or the direction opposite to the direction S1 is defined as the axial direction of the stapler, the direction S2 in fig. 3 is defined as the lateral direction of the stapler, i.e. the width direction, and the direction S3 in fig. 4 is defined as the longitudinal direction of the stapler, i.e. the height direction. In the present invention, in the cartridge assembly, the inner side and the outer side are relative to the channel 19, the side near the channel 19 is the inner side, and the side away from the channel 19 is the outer side, for example, for each receiving groove 14, it has two side walls, one side wall is closer to the channel 19 relative to the other side wall, the side wall near the channel 19 is the inner side wall, and the side wall away from the channel 19 is the outer side wall.

As shown in fig. 2, a magazine cover 2 is further disposed outside the magazine 1, the magazine cover 2 includes a bottom wall and two side walls, the bottom wall of the magazine cover 2 is opposite to the bottom surface of the magazine 1, and the two side walls of the magazine cover 2 are attached to the two side walls of the magazine 1. The side wall of the magazine lid 2 is provided with at least one protrusion 23. The nail bin assembly may further include a nail bin frame (not shown in the figures), when the nail bin assembly needs to be assembled, after the firing block 3 is installed on the proximal end side 11 of the nail bin 1, the firing block 3, the nail bin 1 and the nail bin cover 2 may be installed in the nail bin frame together, and the protruding portion 23 of the nail bin cover 2 is in interference fit with the nail bin frame to well maintain the nail bin 1 in the nail bin frame. During stapler firing, the firing block 3 is driven towards the distal side 12 of the cartridge 1 to push out staples inside the cartridge 1 through the staple holes 17. After the stapler is fired, the firing block 3 moves to the distal end side 12 of the staple cartridge 1, at this time, the firing block 3, the staple cartridge 1 and the staple cartridge cover 2 can be taken out of the staple cartridge rack together, so that the fired staple cartridge 1 can be disassembled, and a new unfired staple cartridge 1 can be replaced in the staple cartridge rack.

As shown in fig. 3, in this embodiment the proximal side 11 of the cartridge 1 has a smaller transverse width than the distal side 12 of the cartridge 1. The nail bin 1 can be placed in the nail bin rack, and the nail bin 1 can be taken out of the nail bin rack more conveniently. The shape of the nail bin cover 2 is also adapted to the shape of the nail bin 1, namely, the transverse distance between the two side walls of the nail bin cover 2 at the near end side is also smaller than the transverse distance between the two side walls of the nail bin cover 2 at the far end side, so that after the nail bin 1 and the nail bin cover 2 are combined, the transverse width of the whole near end side is smaller than the transverse width of the far end side. However, the utility model is not limited thereto, and in alternative embodiments, the lateral width of the proximal side 11 of the cartridge 1 may be equal to or greater than the lateral width of the distal side 12 of the cartridge 1, according to different design requirements.

Fig. 4 is a sectional view taken in the direction of P1-P1 in fig. 3, showing the sectional structure of one accommodation groove 14. The receiving groove 14 includes a first proximal portion 141, a first connecting portion 143, and a first distal portion 142, which are arranged in this order from the proximal end to the distal end, and the first connecting portion 143 is used to receive staples. At least one side wall of the first proximal portion 141 of the receiving groove 14 is provided with a first relief 15, and at least one side wall of the first distal portion 142 of the receiving groove 14 is provided with a second relief 16. The state of the firing block 3 when located on the proximal and distal sides 11, 12 of the cartridge 1, respectively, is exemplarily shown in fig. 4. When the firing block 3 is located at the proximal end side 11 of the staple cartridge 1, the staple pushing portion 31 of the firing block 3 is matched with the first avoiding portion 15. As shown in fig. 6 and 7, when the firing block 3 is located at the proximal end side 11 of the staple cartridge 1, a first avoidance space is formed between the side wall of the receiving groove 14 provided with the first avoidance portion 15 and the staple pushing portion 31, and the transverse width of the first avoidance space is d 1. Therefore, a non-close fit is formed between the proximal end side 11 of the staple cartridge 1 and the firing block 3, so that the proximal end side 11 of the staple cartridge 1 is not spread outward due to the installation of the firing block 3, and even if the firing block 3 is located at the proximal end side 11 of the staple cartridge 1, the proximal end side 11 of the staple cartridge 1 can still keep the initial transverse width from increasing, i.e., when the staple cartridge 1 is installed in the stapler, i.e., when the staple cartridge is installed in a staple cartridge rack, a space for avoiding the first avoiding portion 15 is formed under the action of the staple cartridge rack, so that the difficulty in installing the staple cartridge 1 in the staple cartridge rack is not increased.

As shown in fig. 4, when the firing block 3 is located at the distal end side 12 of the staple cartridge 1, the staple pushing portion 31 of the firing block 3 is engaged with the second avoiding portion 16. As shown in fig. 8 and 10, when the firing block 3 is located at the distal end side 12 of the staple cartridge 1, a second avoiding space is formed between the side wall of the receiving groove 14 provided with the second avoiding portion 16 and the staple pushing portion 31, the transverse width of the second avoiding space is d2, and the width d2 may be the same as or different from the transverse width d1 of the first avoiding space. Therefore, a non-tight fit is formed between the distal end side 12 of the staple cartridge 1 and the firing block 3, so that the distal end side 12 of the staple cartridge 1 is not spread outwards due to the movement of the firing block 3 to the distal end side 12, and even if the firing block 3 is positioned on the distal end side 12 of the staple cartridge 1, the distal end side 12 of the staple cartridge 1 can still keep the initial transverse width and cannot be increased, and the difficulty in detaching the staple cartridge 1 from the staple cartridge rack cannot be increased.

Fig. 5 shows a sectional structure of the gate 19. The state of the firing block 3 when located on the proximal and distal sides 11, 12 of the cartridge 1, respectively, is exemplarily shown in fig. 5. The sipe 19 includes a second proximal portion 191, a second connecting portion 193, and a second distal portion 192, which are arranged in this order from the proximal end to the distal end. At least one sidewall of the second proximal portion 191 of the gate 19 is provided with a third escape portion 181, and at least one sidewall of the second distal portion 192 of the gate 19 is provided with a fourth escape portion 182. When the firing block 3 is located at the proximal end side 11 of the staple cartridge 1, the guide portion 32 of the firing block 3 is matched with the third avoiding portion 181, and when the firing block 3 is located at the distal end side 12 of the staple cartridge 1, the guide portion 32 of the firing block 3 is matched with the fourth avoiding portion 182. As shown in fig. 7, when the firing block 3 is located at the proximal end side 11 of the staple cartridge 1, a third escape space is formed between the side wall of the knife path 19 provided with the third escape portion 181 and the guide portion 32. Therefore, the guide portion 32 is not closely fitted to the proximal end side of the knife path 19, and it is further ensured that the proximal end side 11 of the magazine 1 is not spread outward after the firing block 3 is attached. As shown in fig. 10, when the firing block 3 is located at the distal end side 12 of the staple cartridge 1, a fourth escape space is formed between the side wall of the knife channel 19 provided with the fourth escape portion 182 and the guide portion 32. Therefore, the guiding portion 32 is not tightly fitted with the distal end side of the knife path 19, and further ensures that the distal end side 12 of the nail bin 1 is not spread outwards after the firing block 3 moves to the distal end side. Therefore, the cartridge assembly of the embodiment has a simple structure, and the cartridge 1 can be conveniently and simply mounted and dismounted in the cartridge rack.

As shown in fig. 4, 7 and 9, the first avoidance portion 15 is a first groove. Preferably, the first escape portion 15 is provided on an outer side wall of the proximal end side of the receiving groove 14, and the first escape space is formed between an outer side wall of the nail pushing portion 31 and an outer side wall of the receiving groove 14. As shown in fig. 4, when the firing block 3 is located at the proximal end side 11 of the nail magazine 1, the projection of the nail pushing portion 31 on the plane of the first groove is completely located within the coverage of the first groove, so as to ensure that when the nail pushing portion 31 is located at the proximal end side 11 of the nail magazine 1, the outer side wall of the nail pushing portion 31 does not contact with the outer side wall of the receiving groove 14, and thus, no outward expansion force is applied to the outer side wall of the receiving groove 14. In this embodiment, the shape of the first groove is adapted to the shape of the side wall of the staple pushing part 31, that is, the distal end side of the first groove has an inclined surface adapted to the distal end side of the staple pushing part 31.

As shown in fig. 4 and 10, the second escape portion 16 is a second groove. Preferably, the second escape part 16 is disposed on an outer side wall of a distal end side of the receiving groove 14, and the second escape space is formed between an outer side wall of the staple pushing part 31 and an outer side wall of the receiving groove 14. As shown in fig. 4, when the firing block 3 is located on the distal end side 12 of the staple cartridge 1, the projection of the staple pushing portion 31 on the plane of the second recess is completely located within the coverage of the second recess, so as to ensure that when the staple pushing portion 31 is located on the proximal end side 11 of the staple cartridge 1, the outer sidewall of the staple pushing portion 31 does not contact with the outer sidewall of the receiving groove 14, and thus, no outward expansion force is applied to the outer sidewall of the receiving groove 14. In this embodiment, the shape of the second groove is adapted to the shape of the side wall of the staple pushing portion 31, that is, the distal end side of the second groove has an inclined surface adapted to the distal end side of the staple pushing portion 31.

In this embodiment, the first groove and the second groove are not disposed on the side wall of the first connecting portion 143 of the receiving groove 14, and when the firing block 3 is located at the first connecting portion 143, the two side walls of the staple pushing portion 31 are respectively attached to the two side walls of the first connecting portion 143, so that when the firing block 3 pushes out staples, the staple pushing portion 31 can be ensured to stably move in the axial direction without any lateral deflection, and the firing stability of the stapler is improved.

As shown in fig. 5 and 7, in this embodiment, the third avoidance portion 181 is a third groove. Preferably, the third avoidance portion 181 is formed on each of both side walls of the second proximal portion 191 of the trough 19. As shown in fig. 5, when the firing block 3 is located at the proximal end side 11 of the nail cartridge 1, the projection of the guide portion 32 on the plane of the third groove is completely located within the coverage of the third groove, so as to ensure that when the guide portion 32 is located at the proximal end side 11 of the nail cartridge 1, the outer side wall of the guide portion 32 does not contact with the two side walls of the trough 19, and thus, the outer side wall of the trough 19 does not exert outward expansion force on the two side walls of the trough 19. The shape of the third groove is adapted to the shape of the side wall of the guide portion 32, i.e., the distal end side of the third groove is formed with an inclined surface adapted to the distal end side of the guide portion 32.

As shown in fig. 5 and 10, in this embodiment, the fourth relief 182 is a fourth groove. Preferably, both side walls of the second distal end portion 192 of the sipe 19 are formed with the fourth escape portion 182, respectively. As shown in fig. 5, when the firing block 3 is located on the distal end side 12 of the staple cartridge 1, the projection of the guide portion 32 on the plane of the fourth groove is completely located within the coverage of the fourth groove, so as to ensure that when the guide portion 32 is located on the distal end side 12 of the staple cartridge 1, the outer side wall of the guide portion 32 does not contact with the two side walls of the trough 19, and thus, no outward expansion force is applied to the two side walls of the trough 19. The shape of the fourth groove is adapted to the shape of the side wall of the guide portion 32, i.e., the distal end side of the fourth groove is formed with an inclined surface adapted to the distal end side of the guide portion 32.

In this embodiment, the second connecting portion 193 of the sipe 19 is not provided with the third and fourth grooves. When the trigger block 3 is located at the second connecting portion 193, two side walls of the guide portion 32 are attached to two side walls of the knife slot 19, so that when the trigger block 3 pushes out staples, the guide portion 32 can be ensured to stably move in the axial direction without any transverse deflection, and the triggering stability of the stapler is further improved.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims (13)

1. A staple cartridge assembly for a medical stapler, said staple cartridge assembly comprising:

the nail bin comprises at least one accommodating groove extending along the axial direction of the anastomat, the accommodating groove comprises a first proximal end part and a first distal end part, at least one side wall of the first proximal end part of the accommodating groove is provided with a first avoiding part, and at least one side wall of the first distal end part of the accommodating groove is provided with a second avoiding part; and

the firing block comprises at least one nail pushing part, the nail pushing part enters the accommodating groove, and the nail pushing part can move in the accommodating groove along the axial direction;

when the firing block is positioned at the proximal end side of the nail bin, a first avoidance space is formed between the side wall of the accommodating groove, provided with the first avoidance part, and the nail pushing part; when the firing block is positioned at the far end side of the nail bin, a second avoidance space is formed between the side wall of the second avoidance part and the nail pushing part, wherein the second avoidance space is arranged in the accommodating groove.

2. The staple cartridge assembly of claim 1, wherein said first relief is a first groove and said second relief is a second groove;

when the firing block is positioned at the near end side of the nail bin, the projection of the nail pushing part on the plane where the first groove is positioned is completely positioned in the coverage range of the first groove;

when the firing block is positioned at the far end side of the nail bin, the projection of the nail pushing part on the plane where the second groove is positioned is completely positioned in the coverage range of the second groove.

3. The staple cartridge assembly of claim 2, wherein said first recess is shaped to conform to a shape of a sidewall of said staple pusher and said second recess is shaped to conform to a shape of a sidewall of said staple pusher.

4. The staple cartridge assembly of claim 2, wherein said receiving slot further comprises a first connection between said first distal end portion and said first proximal end portion, wherein when said firing block is positioned at said first connection, two sidewalls of said staple pusher respectively engage two sidewalls of said first connection.

5. The staple cartridge assembly of claim 1, wherein an outer sidewall of said first proximal end portion of said receiving channel is formed with said first relief and an outer sidewall of said first distal end portion of said receiving channel is formed with said second relief.

6. The staple cartridge assembly of claim 1, wherein said staple cartridge further comprises a knife path comprising a second distal end portion and a second proximal end portion, at least one sidewall of said second proximal end portion of said knife path being formed with a third relief, at least one sidewall of said second distal end portion of said knife path being formed with a fourth relief;

the firing block further comprises a guide part which enters the chute;

when the firing block is positioned at the near end side of the nail bin, a third avoidance space is formed between the side wall of the cutter path provided with the third avoidance part and the guide part; when the firing block is positioned at the far end side of the nail bin, a fourth avoidance space is formed between the side wall of the walking groove, which is provided with the fourth avoidance part, and the guide part.

7. The staple cartridge assembly of claim 6, wherein said third relief is a third groove and said fourth relief is a fourth groove;

when the firing block is positioned at the proximal end side of the nail bin, the projection of the guide part on the plane where the third groove is positioned is completely positioned in the coverage range of the third groove;

when the firing block is positioned at the far end side of the nail bin, the projection of the guide part on the plane where the fourth groove is positioned is completely positioned in the coverage range of the fourth groove.

8. The staple cartridge assembly of claim 7, wherein said third groove is shaped to conform to the shape of the side walls of said guide portion and said fourth groove is shaped to conform to the shape of the side walls of said guide portion.

9. The staple cartridge assembly of claim 6, wherein said third relief is formed on each of two side walls of said second proximal portion of said channel and said fourth relief is formed on each of two side walls of said second distal portion of said channel.

10. The staple cartridge assembly of claim 6, wherein said channel further comprises a second connecting portion between said second distal portion and said second proximal portion, wherein when said firing block is positioned at said second connecting portion, two sidewalls of said guide portion engage two sidewalls of said channel.

11. The staple cartridge assembly of claim 1, wherein a lateral width of a proximal side of said staple cartridge is less than a lateral width of a distal side of said staple cartridge.

12. The staple cartridge assembly of claim 11, further comprising a cartridge cover containing said staple cartridge, said cartridge cover comprising a bottom surface and two side walls, said two side walls of said cartridge cover abutting two outer side walls of said staple cartridge, and said two side walls of said cartridge cover having a lateral distance on their proximal sides that is less than the lateral width on their distal sides.

13. A medical stapler comprising a cartridge assembly according to any one of claims 1 to 12.

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