Staple cartridge assembly and medical stapler

Abstract

The present application provides a kind of staple cartridge assembly and medical anastomat, for medical anastomat, staple cartridge assembly includes: staple cartridge frame, it is provided with tool groove in staple cartridge frame, at least one elastic member of the proximal end side of staple cartridge frame extends along the axial direction of tool groove, and the elastic member includes stop portion;And firing block and cutter, firing block includes firing block drive part, and cutter includes cutter drive part;Wherein, when elastic member is in first state, the stop portion of elastic member is at least partially located on the path of cutter from the proximal end side of staple cartridge frame to the distal end side movement;When firing block drive part is located on the proximal end side of the staple cartridge frame and drives the stop portion of elastic member to move to the outside direction of tool groove, elastic member enters second state from first state, and the stop portion of elastic member is separated from the path of cutter from the proximal end side of staple cartridge frame to the distal end side movement.The present application can simply and effectively prevent the secondary firing of anastomat when not replacing the staple cartridge assembly that has been fired.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a cartridge assembly and a medical stapler. BACKGROUND

[0002] In the prior art, a medical stapler generally comprises a device platform, a firing handle movably connected to the device platform, and a staple head mounted on the device platform. The staple head can pass through a small incision on the body through a puncture device to access the surgical site to perform surgery. The staple head comprises a cartridge assembly and an anvil oppositely arranged. The cartridge assembly generally comprises a cartridge, a cartridge holder, and a firing block, a cutter and a pusher rod arranged in sequence from the distal side to the proximal side of the stapler, wherein the pusher rod is located in a housing. When the stapler is fired, the cutter is driven by the pusher rod to move towards the distal side, and the cutter moves to close the cartridge assembly and the anvil, cut the tissue between the cartridge assembly and the anvil, and drive the anastomosis staples out of the cartridge and staple them on the tissue.

[0003] After the operator completes the above-mentioned cutting and stapling action, the stapler needs to be reset, and then the cartridge assembly needs to be replaced, so that the medical stapler can perform the next cutting and stapling operation. However, during the operation, the operator may perform another firing without replacing the fired cartridge, or may fire without installing the cartridge assembly, which may cause adverse consequences.

[0004] In the present application, the distal side and the proximal side are relative to the operator, 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. SUMMARY

[0005] In view of the problems in the prior art, the present application aims to provide a cartridge assembly and a medical stapler, which can simply and effectively prevent the stapler from being fired again without replacing the fired cartridge assembly.

[0006] The present application provides a cartridge assembly for a medical stapler, which comprises:

[0007] a cartridge holder, wherein a knife groove is arranged in the cartridge holder, and at least one elastic member extending in the axial direction of the knife groove is arranged at the proximal side of the cartridge holder, the elastic member comprises a stop portion, and the elastic member comprises a first state and a second state; and

[0008] a firing block and a cutter, wherein the firing block comprises a firing block driving portion, and the cutter comprises a cutter driving portion;

[0009] When the elastic member is in the first state, the stop portion of the elastic member is at least partially located in the path of the cutter driving portion moving from the proximal side to the distal side of the cartridge holder.

[0010] When the firing block driving portion is located on the proximal end side of the cartridge holder and drives the stop portion of the elastic member to move in the direction of the outside of the tool travel groove, the elastic member enters the second state from the first state, and the stop portion of the elastic member is separated from the path of the cutting knife driving portion moving from the proximal end side to the distal end side of the cartridge holder.

[0011] In some embodiments, the stop portion includes a first surface and a second surface, when the elastic member is in the first state, the first surface abuts against the cutting knife driving portion to hinder the cutting knife from moving in the distal end side; when the elastic member is in the second state, the second surface abuts against the side wall of the firing block driving portion to not hinder the cutting knife from moving in the distal end side.

[0012] In some embodiments, the two inner side walls of the tool travel groove are respectively provided with one elastic member, and the distance between the second surfaces of the two elastic members is smaller than the distance between the side walls of the cutting knife driving portion in the first state.

[0013] In some embodiments, the distance between the two side walls of the firing block driving portion is greater than or equal to the distance between the two side walls of the cutting knife driving portion.

[0014] In some embodiments, the cartridge assembly further includes a cartridge accommodated in the cartridge holder, and the stapler further includes an anvil provided opposite to the cartridge, the anvil having a third state of being open relative to the cartridge and a fourth state of being closed relative to the cartridge;

[0015] The cutting knife includes a first position and a second position on the proximal end side of the cartridge holder, the first position being located on the proximal end side of the second position; when the cutting knife is in the first position, the anvil is in the third state, and when the cutting knife moves from the first position to the second position, the cutting knife drives the anvil to enter the fourth state.

[0016] When the elastic member is in the first state and the anvil is in the fourth state, the first surface abuts against the cutting knife driving portion.

[0017] In some embodiments, the inner side wall of the tool travel groove of the cartridge holder is provided with a first installation groove, and the free end of the elastic member at least partially enters the first installation groove, the width of the corresponding first installation groove at the free end of the elastic member when the elastic member is in the first state being greater than the width of the corresponding first installation groove at the free end of the elastic member when the elastic member is in the second state.

[0018] In some embodiments, the elastic member is a strip-shaped elastic piece, the elastic piece further comprises a connecting portion and a body portion, the body portion is located between the connecting portion and the stop portion, and the connecting portion is connected to the inner side wall of the tool travel groove.

[0019] In some embodiments, the connecting portion and the stop portion of the elastic piece are respectively arranged at the distal end side and the proximal end side of the elastic piece, or the connecting portion and the stop portion of the elastic piece are respectively arranged at the proximal end side and the distal end side of the elastic piece.

[0020] In some embodiments, the connecting portion and the stop portion of the elastic piece are respectively arranged at the distal end side and the proximal end side of the elastic piece, the proximal end side surface of the stop portion comprises the first surface, and the first surface is perpendicular to the axial direction of the anastomat when the elastic piece is in the first state.

[0021] In some embodiments, the connecting portion and the stop portion of the elastic piece are respectively arranged at the proximal end side and the distal end side of the elastic piece, the proximal end side of the stop portion comprises the first surface, and the first surface is perpendicular to the axial direction of the anastomat when the elastic piece is in the first state.

[0022] In some embodiments, the elastic piece is integrally formed with the cartridge frame.

[0023] In some embodiments, the side wall of the tool travel groove is provided with a second mounting groove, and the connecting portion of the elastic piece is embedded in the second mounting groove.

[0024] In some embodiments, the body portion is arranged in a wave shape along the axial direction of the tool travel groove.

[0025] In some embodiments, the cartridge assembly further comprises a cartridge accommodated in the cartridge frame, one side surface of the cartridge is a cartridge surface, and the firing block driving portion is a protrusion arranged on the side surface of the firing block away from the cartridge surface.

[0026] The elastic member is arranged on the inner side wall of the tool travel groove, and the elastic member enters the second state when the firing block driving portion is located at the proximal end side of the cartridge frame and at least partially enters the tool travel groove.

[0027] In some embodiments, the proximal end side wall of the protrusion is provided with a guide surface.

[0028] In some embodiments, the elastic member is arranged on the inner side surface of the bottom plate of the cartridge frame, and the firing block driving portion is an extension portion extending from the proximal end side of the firing block to the proximal end side direction of the anastomat.

[0029] In some embodiments, the cutting knife is an I-shaped cutting knife comprising an upper beam and a lower beam, a blade is arranged between the upper beam and the lower beam, and the firing block driving portion is located between the blade and the lower beam.

[0030] The embodiment of the present application also provides a medical anastomat comprising the above nail cartridge assembly.

[0031] The nail cartridge assembly and the medical anastomat provided by the present application have the following advantages.

[0032] The present application provides a nail cartridge assembly for a medical anastomat, wherein an elastic member is arranged in a nail cartridge frame, the elastic member has a first state and a second state, the elastic member is in the first state when not subjected to external force, after the nail cartridge is installed, the firing block driving portion is located at the proximal end side of the nail cartridge frame and expands the elastic member outward, so that the elastic member enters the second state, at this time, the movement of the cutting knife to the distal end side is not blocked, the anastomat can be fired, when the anastomat is fired, the firing block is left at the distal end side of the nail cartridge assembly, the elastic member returns to the first state, and the movement of the cutting knife to the distal end side is blocked by the blocking portion, at this time, the anastomat cannot be fired, and the situation that the anastomat is fired again without replacing the fired nail cartridge is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0033] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings.

[0034] Figure 1 is a structure schematic view of a nail head of the first embodiment of the present application;

[0035] Figure 2 is a structure schematic view of a nail cartridge assembly of the first embodiment of the present application;

[0036] Figure 3 is a bottom view of the nail cartridge assembly of the first embodiment of the present application, wherein the cutting knife is in the first position and the elastic member is in the second state;

[0037] Figure 4 is a bottom view of the nail cartridge assembly of the first embodiment of the present application, wherein the cutting knife is in the second position and the elastic member is in the second state;

[0038] Figure 5 is Figure 4 an enlarged view of A1 in FIG. 8;

[0039] Figure 6 is Figure 4 a sectional view of B1-B1 direction in FIG. 8;

[0040] Figure 7 is a structure schematic view of the cooperation between the cutting knife and the firing block of the first embodiment of the present application;

[0041] Figure 8 is a perspective view of the staple cartridge assembly of the first embodiment of the present application with the knife in the second position and the resilient member in the first state;

[0042] Figure 9 is Figure 8 is an enlarged view of area A2 in FIG. 8;

[0043] Figure 10 is a bottom view of the staple cartridge assembly of the first embodiment of the present application with the knife in the second position and the resilient member in the first state;

[0044] Figure 11 is Figure 10 is an enlarged view of area A3 in FIG. 9;

[0045] Figure 12 is Figure 10 is a cross-sectional view taken along lines B2-B2 in FIG. 10;

[0046] Figure 13 is a partial view from the bottom of the staple cartridge holder of the second embodiment of the present application;

[0047] Figure 14 is a partial view from the bottom of the staple cartridge assembly of the second embodiment of the present application with the knife in the second position and the resilient member in the second state;

[0048] Figure 15 is a partial view from the bottom of the staple cartridge assembly of the second embodiment of the present application with the knife in the second position and the resilient member in the first state;

[0049] Figure 16 is a partial view from the bottom of the staple cartridge holder of the third embodiment of the present application;

[0050] Figure 17 is a partial view from the bottom of the staple cartridge assembly of the third embodiment of the present application with the knife in the second position and the resilient member in the second state;

[0051] Figure 18 is a partial view from the bottom of the staple cartridge assembly of the third embodiment of the present application with the knife in the second position and the resilient member in the first state;

[0052] Figure 19 is a partial view from the bottom of the staple cartridge assembly of the fourth embodiment of the present application with the knife in the second position and the resilient member in the second state;

[0053] Figure 20 is a partial view from the bottom of the staple cartridge assembly of the fourth embodiment of the present application with the knife in the second position and the resilient member in the first state;

[0054] Figure 21 is a partial view of the bottom direction of the cartridge assembly of the fifth embodiment of the present application, in which the cutter is in the second position and the elastic member is in the second state;

[0055] Figure 22 is a partial view of the bottom direction of the cartridge assembly of the fifth embodiment of the present application, in which the cutter is in the second position and the elastic member is in the first state;

[0056] Figure 23 is a partial view of the top direction of the cartridge assembly of the sixth embodiment of the present application, in which the cutter is in the second position and the elastic member is in the second state;

[0057] Figure 24 is a partial view of the top direction of the cartridge assembly of the sixth embodiment of the present application, in which the cutter is in the second position and the elastic member is in the first state;

[0058] Figure 25 is a structural schematic view of the firing block and the cutter of the sixth embodiment of the present application.

[0059] Reference Signs:

[0060] 1 cartridge 322 second surface

[0061] 11 cartridge face 33 body portion

[0062] 2 cartridge holder 4 firing block

[0063] 21 distal side of cartridge holder 41 firing block driving portion

[0064] 22 proximal side of cartridge holder 42 guide surface

[0065] 23 cutter slot 5 cutter

[0066] 24 first mounting slot 51 cutter driving portion

[0067] 25 second mounting slot 52 upper cross beam

[0068] 3 spring 53 lower cross beam

[0069] 31 connecting portion 54 cutting edge

[0070] 32 stop portion 6 anvil

[0071] 321 first surface DETAILED DESCRIPTION

[0072] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals in different drawings identify like or similar elements, and the duplication of the description of these elements will be omitted.

[0073] The present application provides a staple cartridge assembly for a surgical stapler and a surgical stapler comprising the same, the surgical stapler comprising a device platform, a firing handle movably connected to the device platform, and a staple head mounted to the device platform, the staple head comprising oppositely arranged staple cartridge assembly and anvil. The staple cartridge assembly comprises a staple cartridge frame, a firing block and a knife, the staple cartridge frame is provided with a knife travel groove extending along the axial direction of the surgical stapler, the knife at least partially enters the knife travel groove and is movable along the extension direction of the knife travel groove.

[0074] In order to prevent the secondary firing of the surgical stapler when the fired staple cartridge assembly is not replaced, at least one elastic member extending along the axial direction of the knife travel groove is arranged on the proximal side of the staple cartridge frame, the elastic member comprises a stop portion, the elastic member comprises a first state and a second state, the firing block comprises a firing block driving portion, and the knife comprises a knife driving portion. When the elastic member is in the first state, the stop portion of the elastic member is at least partially located on the path of the movement of the knife driving portion from the proximal side to the distal side of the staple cartridge frame. When the firing block driving portion is located on the proximal side of the staple cartridge frame and drives the stop portion of the elastic member to move to the outside of the knife travel groove, the elastic member changes from the first state to the second state, and the stop portion of the elastic member is out of the path of the movement of the knife driving portion from the proximal side to the distal side of the staple cartridge frame.

[0075] In the initial state, the firing block and the knife are both located on the proximal side of the staple cartridge frame. The firing block driving portion drives the stop portion of the elastic member to move to the outside of the knife travel groove, so that the stop portion of the elastic member is out of the path of the movement of the knife driving portion from the proximal side to the distal side of the staple cartridge frame, i.e. the elastic member is in the second state, and the movement of the knife to the distal side is not blocked. At this time, by holding the firing handle, the knife can be driven to move to the distal side of the staple cartridge frame, the knife drives the firing block to move to the distal side to push out the surgical staples, and the knife cuts the tissue to realize the firing of the surgical stapler.

[0076] After the anastomat is fired, the firing block remains on the distal side of the cartridge holder, and the knife is returned to the proximal side of the cartridge holder under the action of the reset mechanism. At this time, the stop portion of the elastic member loses the driving effect of the firing block and returns to the first state, that is, the stop portion of the elastic member is at least partially located on the path of the movement of the knife driving portion from the proximal side to the distal side of the cartridge holder. When the cartridge assembly is not installed to the cartridge holder, the stop portion of the elastic member is also not driven by the firing block, and the elastic member is also in the first state. At this time, even if the firing handle is held to move the knife to the distal side, the knife will be stopped by the stop portion of the elastic member when it moves to the stop portion of the elastic member, and cannot be further moved to the distal side, so that the anastomat cannot be fired, thereby avoiding the situation that the anastomat is fired again without replacing the fired cartridge.

[0077] The structure of the cartridge assembly of each embodiment of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that each embodiment is not a limitation on the protection scope of the present application.

[0078] Figures 1-12 The structure of the cartridge assembly of the first embodiment of the present application is shown in the figure. In the first embodiment of the present application, a cartridge assembly for a medical anastomat and a medical anastomat comprising the same are provided, the medical anastomat comprising an instrument platform (not shown in the figure), a firing handle (not shown in the figure) movably connected to the instrument platform, and a cartridge head mounted on the instrument platform. As shown in the figure, Figure 1 The cartridge head comprises a cartridge assembly and an anvil 6 arranged oppositely, and the anvil 6 has a third state of being opened relative to the cartridge assembly and a fourth state of being closed relative to the cartridge assembly, Figure 1 The third state of the anvil 6 is shown in the figure. As shown in the figure, Figure 2 The cartridge assembly comprises a cartridge holder 2, a cartridge 1 contained in the cartridge holder 2, and a knife 5, the cartridge 1 is used to contain anastomat staples, the upper surface of the cartridge 1 is a cartridge surface 11, and a plurality of staple holes are arranged on the cartridge surface 11. As shown in the figure, Figures 3-7As shown, the cartridge assembly further comprises a firing block 4, the cartridge frame 2 is provided with a tool travel groove 23 extending along the axial direction of the stapler, the cutter 5 at least partially enters the tool travel groove 23 and can move along the extension direction of the tool travel groove 23. The initial position of the firing block 4 and the initial position of the cutter 5 are both located on the proximal side of the cartridge frame 2. The cutter 5 comprises a first position and a second position on the proximal side 22 of the cartridge frame 2, the first position is located on the proximal side of the second position, and the first position and the second position are both located on the proximal side of the initial position of the firing block 4. In the initial state, the anvil 6 is in the open state, the firing block 4 is located on the proximal side 22 of the cartridge frame 2, the cutter 5 is located in the first position, and the anvil 6 is in the third state. When the cutter 5 moves from the first position to the second position, the cutter 5 drives the anvil 6 to enter the fourth state from the third state, so that the anvil 6 is closed relative to the cartridge assembly.

[0079] In the present application, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, the end farther away from the operator, i.e. the end closer to the surgical position is the distal side, the direction along the axis of the stapler is the axial direction, i.e. the direction from the distal side of the stapler to the proximal side, or the direction from the proximal side of the stapler to the distal side. For example, in the perspective of Figure 1 of the stapler, the distal side 21 of the cartridge frame 2 is the left side thereof, and the proximal side 22 thereof is the right side thereof. In the perspective of Figure 1 of the stapler, the S1 direction is the direction from the proximal side of the stapler to the distal side, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler. It is defined that Figure 1 the S2 direction shown is the height direction, Figure 3 the S3 direction shown is the width direction. In the present application, for a component, the inner side and the outer side are relative to the axis of the stapler, the side close to the axis is the inner side, and the side away from the axis is the outer side.

[0080] As shown in Figures 3-7As shown, at least one elastic member is disposed on the proximal sidewall of the cutting groove 23. In this embodiment, the elastic member is a strip-shaped spring 3 extending substantially along the axial direction of the stapler. One spring 3 is disposed on each of the proximal sidewalls of the cutting groove 23, and the two spring 3 are positioned opposite each other. The spring 3 comprises a connecting portion 31, a main body 33, and a stopper 32. The main body 33 is located between the connecting portion 31 and the stopper 32. The spring 3 is connected to the sidewall of the cutting groove 23 via the connecting portion 31. At least the main body 33 of the spring 3 is elastic. Preferably, each sidewall of the cutting groove 23 defines a first mounting groove 24, with the free end of the spring 3 at least partially inserted into the first mounting groove 24. In this embodiment, the free end of the spring 3 is the end of the spring 3 that can move relative to the cutting groove 23 toward or away from the sidewall. In this embodiment, the spring piece 3 is an integral structure, that is, the connecting portion 31, the main body portion 33 and the stop portion 32 are integrally formed. In other alternative embodiments, the connecting portion 31, the main body portion 33 and the stop portion 32 may also be separately formed components, fixedly connected to each other. In this embodiment, the spring piece 3 and the nail magazine rack 2 are integrally formed, and after the nail magazine rack 2 is prepared, the spring piece 3 may be further cut out on the side wall of the tool groove 23 of the nail magazine rack 2. In other alternative embodiments, the spring piece 3 and the nail magazine rack 2 may also be separately formed components, and the spring piece 3 is fixedly connected to the side wall of the tool groove 23 by welding or riveting the connecting portion 31.

[0081] like Figure 5 As shown, in this embodiment, the connecting portion 31 of the elastic sheet 3 is located at the distal end of the elastic sheet 3, the stopping portion 32 of the elastic sheet 3 is located at the proximal end of the elastic sheet 3, the proximal end of the stopping portion 32 includes a first surface 321, and the inner side of the stopping portion 32 includes a second surface 322. Figure 7 As shown, the firing block 4 includes a firing block driving portion 41, and the cutter 5 includes a cutter driving portion 51. In this embodiment, the firing block driving portion 41 is a protrusion provided on the side surface of the firing block 4 away from the nail magazine surface 11. Figure 7 From the perspective of FIG, the protrusion is provided on the lower surface of the firing block 4. Preferably, a guide surface 41 is provided on the distal end of the protrusion. The guide surface 41 is a circular arc surface, which facilitates the firing block 4 to enter between the spring pieces 3 during assembly. The cutter 5 is an I-shaped cutter 5 including an upper crossbeam 52 and a lower crossbeam 53. A cutting edge 54 is provided between the upper crossbeam 52 and the lower crossbeam 53. The firing block driving unit 41 is located between the cutting edge 54 and the lower crossbeam 53.

[0082] The spring piece 3 includes a first state and a second state. When the spring piece 3 is not subjected to the force of the firing block, it is in the first state. At this time, the stop portion 32 of the spring piece 3 is at least partially located on the path of the cutter driving unit 51 moving from the proximal side 22 to the distal side 21 of the stapler frame 2. In this state, when the cutter 5 moves toward the distal side 21 of the stapler frame 2 and reaches the stop portion 32 of the spring piece 3, the first surface 321 of the stop portion 32 abuts against the cutter driving unit 51. The cutter driving unit 51 is stopped by the stop portion 32, preventing the cutter 5 from continuing to move toward the distal side 21 of the stapler frame 2, thereby preventing the stapler from firing. Therefore, the first state of the spring piece 3 is the stop state, which serves as a firing safety for the stapler. When the firing block driving part 41 at least partially enters the tool groove 23 and drives the stop part 32 of the spring piece 3 to move toward the outside of the tool groove 23, the spring piece 3 enters the second state from the first state. At this time, the second surface 322 of the stop part 32 abuts against the side wall of the firing block driving part 41, and the stop part 32 of the spring piece 3 disengages from the path of the cutter driving part 51 moving from the proximal side 22 to the distal side 21 of the nail magazine rack 2, instead of just blocking the movement of the cutter 5 to the distal side. In this state, the cutter 5 can move from the proximal side 22 to the distal side 21 of the nail magazine rack 2 and fire the stapler normally. Therefore, the second state of the spring piece 3 is the avoidance state.

[0083] The following combination Figures 3-12 The structure of the nail magazine assembly of the present invention in different states is described in detail. Figure 3 As shown, in the initial state, the firing block 4 and the cutter 5 are both located at the proximal side 22 of the nail magazine rack 2. The firing block driving portion 41 at least partially enters the cutting groove 23 and drives the stopper 32 of the spring piece 3 to move toward the outside of the cutting groove 23. The second surface 322 of the stopper 32 abuts against the side wall of the firing block driving portion 41, so that the stopper 32 of the spring piece 3 is separated from the path of the cutter driving portion 51 moving from the proximal side 22 to the distal side 21 of the nail magazine rack 2, that is, the spring piece 3 is in the second state. Figure 3 From the perspective of , the movement of the stopper 32 of the spring piece 3 toward the outside of the tool groove 23 means that the stopper 32 of the spring piece 3 located on the upper side moves upward relative to the position in the first state, and the stopper 32 of the spring piece 3 located on the lower side moves downward relative to the position in the first state. Figure 3 As shown, the cutter 5 is in the first position, and the anvil 6 is in the third position, open relative to the magazine assembly. At this time, the stopper 32 of the spring plate 3 is driven by the cutter driving unit 51 to move closer to the outside of the magazine frame 2, thus departing from the movement path of the cutter 5. Therefore, the stopper 32 of the spring plate 3 does not block the movement of the cutter 5 toward the distal end 21 of the magazine frame 2.

[0084] In Figure 3 the state, holding the firing knob of the stapler, the cutting knife 5 can be driven by the firing assembly inside the instrument platform and the knife bar to move to the second position, i.e. to the Figure 4 position of the stapler. In the process of moving the cutting knife 5 from the first position to the second position, the anvil 6 is driven by the cutting knife 5 to enter the fourth state closed relative to the cartridge assembly. In Figures 4-6 the state, under the action of the firing block driving part 41, the spring sheet 3 is in the second state, and the distance between the second surfaces 322 of the two stop parts 32 in the S3 direction is greater than or equal to the distance between the two side walls of the cutting knife driving part 51 in the S3 direction. In Figure 5 , in order to clearly show the positional relationship between the cutting knife 5 and the stop part 32, the cutting knife driving part 51 is referred to as a box, and the other parts of the cutting knife 5 are omitted. At this time, continue to hold the firing knob, the cutting knife driving part 51 can continue to move to the distal side between the two stop parts 32, the cutting knife 5 drives the firing block 4 to move to the distal side to push out the anastomosis needle to suture the tissue, and the cutting knife 5 cuts the tissue to realize the firing of the stapler.

[0085] In this embodiment, in order to realize that the spring sheet 3 does not block the movement of the cutting knife 5 to the distal side 21 of the cartridge holder 2 in the second state, it is necessary to make the distance between the two side walls of the firing block driving part 41 in the S3 direction greater than or equal to the distance between the two side walls of the cutting knife driving part 51 in the S3 direction, so as to ensure that when the stop parts 32 of the spring sheet 3 are stretched, the distance between the second surfaces 322 of the two stop parts 32 in the S3 direction is greater than or equal to the distance between the two side walls of the cutting knife driving part 51 in the S3 direction.

[0086] After the stapler is fired, the firing block 4 remains on the distal side 21 of the cartridge holder 2, and the cutting knife 5 returns to the proximal side 22 of the cartridge holder 2 under the action of the reset mechanism, i.e. enters Figures 8-12 the state. As shown in Figure 9 and Figure 11 , the stop parts 32 of the spring sheet 3 lose the driving action of the firing block 4 and return to the first state, i.e. the stop parts 32 of the spring sheet 3 are at least partially located on the path of the cutting knife driving part 51 moving from the proximal side 22 to the distal side of the cartridge holder 2. As shown in Figure 11 , when the spring sheet 3 is in the first state, the width of the first mounting groove 24 corresponding to the free end of the spring sheet 3 is greater than the width of the first mounting groove 24 corresponding to the free end of the spring sheet 3 when the spring sheet 3 is in the second state. In Figure 11In order to clearly illustrate the positional relationship between the cutter 5 and the stopper 32, the lower crossbeam 53 is omitted, and the cutter drive unit 51 is represented by a box. At this point, even if the firing handle is gripped to cause the cutter 5 to move distally, when the cutter 5 reaches the stopper 32 of the spring clip 3, the cutter drive unit 51 abuts against the first surface 321 of the stopper 32. The cutter 5 is stopped by the stopper 32 of the spring clip 3 and cannot move further distally, thus preventing the stapler from being fired again. This prevents the stapler from being fired again without replacing the fired cartridge assembly or installing the cartridge assembly. Therefore, the first state of the spring clip 3 is a stop state, which serves as a firing safety. Preferably, when the spring clip 3 is in the first state, the first surface 321 is a vertical surface perpendicular to the axial direction of the stapler. When the cutter drive unit 51 abuts against the first surface 321, the vertical surface can better stop the cutter drive unit 51, preventing the safety from failing.

[0087] Figures 13-15 FIG. 1 is a partial structural diagram of a staple cartridge assembly according to a second embodiment of the present invention. Figure 13 As shown, the difference between this embodiment and the first embodiment is that the connecting portion 31 and the stop portion 32 of the spring piece 3 are respectively arranged on the proximal side and the distal side of the spring piece 3, and the proximal side of the stop portion 32 includes a first surface 321, and the first surface 321 extends toward the center line of the nail magazine rack 2 relative to the main body portion 33 of the spring piece 3. Figure 14 The figure shows the state when the anvil 6 is closed relative to the stapler assembly but the stapler is not fired, wherein the firing block drive unit 41 and the cutter drive unit 51 are replaced by boxes to illustrate their positional relationship with the stopper 32. Figure 14 As shown, the firing block driving part 41 enters between the stop parts 32 of the two spring pieces 3, and pushes the stop parts 32 of the two spring pieces 3 outward, so that the distance between the second surfaces 322 of the two stop parts 32 is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, and the spring piece 3 is in the second state, and the second surface 322 of the stop part 32 is abutted against the firing block driving part 51, and the stop part 32 will not stop the cutter driving part 51, and the cutter 5 moves toward the distal side 21 of the nail magazine rack 2 to realize the firing of the anastomosis device.

[0088] Figure 15The state of the cutter 5 returning to the proximal side 22 of the cartridge holder 2 after the anastomat firing is shown. At this time, the firing block 4 remains on the distal side 21 of the cartridge holder 2, the spring 3 returns to the first state, the distance between the second surfaces 322 of the two stop portions 32 is less than the distance of the two side walls of the cutter driving portion 51 in the S3 direction, and the stop portion 32 will stop the movement of the cutter 5 to the distal side 21 of the cartridge holder 2. The distal end face of the cutter driving portion 51 will abut against the first surface 321 of the stop portion 32, and cannot continue to move to the distal side 21 of the cartridge holder 2, thereby avoiding the case of firing again without replacing the fired cartridge assembly or firing without installing the cartridge assembly, so that the first state of the spring 3 is the stop state. Preferably, when the spring 3 is in the first state, the first surface 321 is a vertical surface perpendicular to the axial direction of the anastomat, which can better stop the cutter driving portion 51 and avoid the failure of the safety.

[0089] Figures 16-18 The partial structure diagram of the cartridge assembly of the third embodiment of the present application is shown. As shown in Figure 16 and Figure 17 The difference between this embodiment and the second embodiment is that the spring 3 and the cartridge holder 2 are independent components, the second mounting groove 25 is arranged on the side wall of the cutter groove 23, and the connecting portion 31 of the spring 3 is embedded in the second mounting groove 25. In other alternative embodiments, the connecting portion 31 of the spring 3 can also be connected to the side wall of the cutter groove 23 by welding, riveting, fastener connection, etc. In this third embodiment, the body portion 32 of the spring 3 is arranged in a wave shape along the axial direction of the cutter groove 23. Figure 17 The state of the anvil 6 closing relative to the cartridge assembly but the anastomat not firing is shown, wherein the firing block driving portion 41 and the cutter driving portion 51 are replaced by a box to illustrate their positional relationship with the stop portion 32. As shown in Figure 17 The firing block driving portion 41 enters between the stop portions 32 of the two springs 3, and the stop portions 32 of the two springs 3 are pried outward, so that the distance between the second surfaces 322 of the two stop portions 32 is greater than or equal to the distance of the two side walls of the cutter driving portion 51 in the S3 direction, the spring 3 is in the second state, the second surface 322 of the stop portion 32 abuts against the firing block driving portion 51, the stop portion 32 does not stop the cutter driving portion 51, and the movement of the cutter 5 to the distal side 21 of the cartridge holder 2 can realize the firing of the anastomat.

[0090] Figure 18The state is shown that the cutter 5 returns to the proximal side 22 of the cartridge holder 2 after the anastomat is fired. At this time, the firing block 4 remains on the distal side 21 of the cartridge holder 2, the spring 3 returns to the first state, the distance between the second surfaces 322 of the two stoppers 32 is less than the distance of the two side walls of the cutter driving part 51 in the S3 direction, and the stopper 32 will stop the movement of the cutter 5 to the distal side 21 of the cartridge holder 2. The distal end face of the cutter driving part 51 will abut against the first surface 321 of the stopper 32, so that the cutter 5 cannot continue to move to the distal side 21 of the cartridge holder 2, thereby avoiding the situation that the anastomat is fired again without replacing the fired cartridge assembly or the anastomat is fired without installing the cartridge assembly, so that the first state of the spring 3 is the stop state. Preferably, when the spring 3 is in the first state, the first surface 321 is a vertical surface perpendicular to the axial direction of the anastomat, which can better stop the cutter driving part 51 and avoid the failure of the safety device. Preferably, the second mounting groove 25 is in communication with the first mounting groove 24, and the second mounting groove 25 extends in the axial direction of the anastomat, but the present application is not limited thereto.

[0091] The structure of this embodiment can also be combined with the first embodiment, that is, the connecting part 31 and the stopper 32 of the spring 3 are respectively arranged on the distal side and the proximal side of the spring 3, and the connecting part 31 of the spring 3 is fixed into the side wall of the cutter groove 23 by embedding in the second mounting groove 25, welding, fastener connection or the like, which also belongs to the protection scope of the present application.

[0092] Figure 19 And Figure 20 It is a partial structure diagram of the cartridge assembly of the fourth embodiment of the present application, in which the firing block driving part 41 and the cutter driving part 51 are replaced by a block to illustrate the positional relationship with the stopper 32. The difference between this embodiment and the third embodiment is that only one first mounting groove 24 is arranged on one side wall of the cutter groove 23. Figure 19 The state is shown that the anvil 6 is closed relative to the cartridge assembly but the anastomat is not fired, in which the firing block driving part 41 and the cutter driving part 51 are replaced by a block to illustrate the positional relationship with the stopper 32. As Figure 19As shown, the firing block driving part 41 enters between the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3, so that the stop portion 32 of the spring piece 3 moves to the outside of the tool path groove 23, to increase the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3. At this time, the spring piece 3 is in the second state, the distance between the two side walls of the firing block driving part 41 in the S3 direction is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3 is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the stop portion 32 of the spring piece 3 does not stop the cutter driving part 51, and the cutter 5 moves to the far end side 21 of the cartridge holder 2, which can realize the firing of the stapler.

[0093] Figure 20 As shown, the firing block driving part 41 enters between the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3, so that the stop portion 32 of the spring piece 3 moves to the outside of the tool path groove 23, to increase the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3. At this time, the spring piece 3 is in the second state, the distance between the two side walls of the firing block driving part 41 in the S3 direction is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3 is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the stop portion 32 of the spring piece 3 does not stop the cutter driving part 51, and the cutter 5 moves to the far end side 21 of the cartridge holder 2, which can realize the firing of the stapler.

[0094] Figure 21 and Figure 22 As shown, the firing block driving part 41 enters between the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3, so that the stop portion 32 of the spring piece 3 moves to the outside of the tool path groove 23, to increase the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3. At this time, the spring piece 3 is in the second state, the distance between the two side walls of the firing block driving part 41 in the S3 direction is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the distance between the second surface 322 of the stop portion 32 of the spring piece 3 and the side wall of the tool path groove 23 which is not provided with the spring piece 3 is greater than or equal to the distance between the two side walls of the cutter driving part 51 in the S3 direction, so that the stop portion 32 of the spring piece 3 does not stop the cutter driving part 51, and the cutter 5 moves to the far end side 21 of the cartridge holder 2, which can realize the firing of the stapler. Figure 21As shown, when the stapler is not fired, the firing block driving part 41 enters between the stop part 32 and the side wall of the feed groove 23 where the spring piece 3 is not provided, and the second surface 322 of the stop part 32 abuts against the side wall of the firing block driving part 41. At this time, the distance between the second surface 322 and the side wall of the feed groove 23 where the spring piece 3 is not provided is greater than the distance between the two side walls of the cutter driving part 51 in the S3 direction, and the spring piece 3 is in the second state. When the stapler is fired, the cutter driving part 51 can move toward the distal side to fire the stapler. After the stapler is fired, the firing block driving part 41 remains on the distal side of the stapler magazine rack 2, and the spring piece 3 returns to the first state, that is, Figure 22 In the state shown, the distance between the second surface 322 of the stop portion 32 and the side wall of the tool groove 23 where the spring piece 3 is not provided is smaller than the distance between the two side walls of the cutter drive portion 51 in the S3 direction, and the spring piece 3 is in the first state. At this time, when the cutter drive portion 51 moves toward the distal side, the first surface 321 of the spring piece 3 abuts against the cutter drive portion 51 to prevent the cutter from moving toward the distal side.

[0095] Figure 21 and Figure 22 The structure of the fifth embodiment shown can also be combined with the second embodiment. For example, replacing one of the spring pieces 3 of the fifth embodiment with the spring piece 3 of the second embodiment, or replacing the spring piece 3 of the fifth embodiment with an elastic member of another structure, all fall within the scope of protection of the present invention. The above embodiments are described using the elastic member as a strip-shaped spring piece 3 as an example. In other alternative embodiments, the elastic member can also be a spring piece of other shapes, such as a round or square shape, or other elastic structures can be used instead of a spring piece, all of which fall within the scope of protection of the present invention.

[0096] Figures 23-25 The structure of the staple cartridge assembly according to the sixth embodiment of the present invention is shown. Figure 23 and Figure 24 In the figure, the cutter drive unit 51 is replaced by a box to illustrate its positional relationship with the stopper 32. This embodiment differs from the first embodiment in that the spring piece 3 is disposed on the inner surface of the bottom plate of the magazine frame 2, the connecting portion 31 of the spring piece 3 is located on the proximal side of the spring piece 3, and the stopper 32 of the spring piece 3 is located on the distal side of the spring piece 3. The firing block drive unit 41 is an extension extending from the proximal side of the firing block 4 toward the proximal side of the stapler.

[0097] like Figure 23As shown, when the firing block driving part 41 is located at the proximal end side 22 of the cartridge holder 2, the firing block driving part 41 drives the stop portion 32 of the spring 3 to move outward, the spring 3 is deformed, at this time, the second surface 322 of the stop portion 32 of the spring 3 is in abutment with the side wall of the firing block driving part 41, and the spring 3 is in the second state. The stop portion 32 does not stop the movement of the cutter driving part 51 to the distal end side, and the anastomat can be fired. As shown in FIG. 6, when the firing block driving part 41 is not located at the proximal end side 22 of the cartridge holder 2, the spring 3 returns to the first state, the first surface 321 of the stop portion 32 of the spring 3 is in axial alignment with the cutter driving part 51, and when the cutter 5 moves to the stop portion 32, the first surface 321 of the stop portion 32 is in abutment with the cutter driving part 51, thereby stopping the cutter 5 from moving to the distal end side, and the anastomat cannot be fired. Figure 24 As shown, when the firing block driving part 41 is located at the proximal end side 22 of the cartridge holder 2, the firing block driving part 41 drives the stop portion 32 of the spring 3 to move outward, the spring 3 is deformed, at this time, the second surface 322 of the stop portion 32 of the spring 3 is in abutment with the side wall of the firing block driving part 41, and the spring 3 is in the second state. The stop portion 32 does not stop the movement of the cutter driving part 51 to the distal end side, and the anastomat can be fired. As shown in FIG. 6, when the firing block driving part 41 is not located at the proximal end side 22 of the cartridge holder 2, the spring 3 returns to the first state, the first surface 321 of the stop portion 32 of the spring 3 is in axial alignment with the cutter driving part 51, and when the cutter 5 moves to the stop portion 32, the first surface 321 of the stop portion 32 is in abutment with the cutter driving part 51, thereby stopping the cutter 5 from moving to the distal end side, and the anastomat cannot be fired.

[0098] The sixth embodiment can also be combined with the features of the above embodiments to produce other variations. For example, the connecting portion 31 of the spring 3 of the sixth embodiment is arranged at the distal end side of the spring 3, and the stop portion 32 is arranged at the proximal end side of the spring 3, or the inner surface of the bottom plate of the cartridge holder 2 is provided with two springs 3, and the two springs 3 are symmetrically arranged relative to the cutter groove 2, which all belong to the protection scope of the present application.

[0099] The staple cartridge assembly and the medical anastomat provided by the present application have the following advantages:

[0100] The present application provides a staple cartridge assembly for a medical anastomat, which is provided with an elastic member in a cutter groove of a cartridge holder. The elastic member has a first state and a second state. The elastic member is in the first state when it is not subjected to external force. After the staple cartridge is installed, a firing block driving part is located at the proximal end side of the cutter groove and expands the elastic member outward, so that the elastic member enters the second state, and at this time, the movement of a cutter to the distal end side is not blocked, and the anastomat can be fired. When the anastomat is fired, the firing block is left at the distal end side of the staple cartridge assembly, the elastic member returns to the first state, and the movement of the cutter to the distal end side is blocked by a blocking portion, and at this time, the anastomat cannot be fired, thereby avoiding the situation that the anastomat is fired again without replacing the fired staple cartridge.

[0101] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be regarded as belonging to the protection scope of the present application.

Claims

1. A staple cartridge assembly, characterized in that: For a medical stapler, the staple cartridge assembly comprises: A nail magazine frame, wherein a cutting groove is provided in the nail magazine frame, and elastic members extending along the axial direction of the cutting groove are respectively provided on two inner side walls of the cutting groove on the proximal end side of the nail magazine frame, wherein the elastic members are spring sheets, the elastic members include a stop portion, and the elastic members include a first state and a second state; and a firing block and a cutter, wherein the firing block includes a firing block drive portion, and the cutter includes a cutter drive portion; Wherein, when the elastic member is in the first state, the stop portion of the elastic member is at least partially located on a path of the cutter driving portion moving from the proximal side to the distal side of the staple magazine frame; When the firing block driving portion is located on the proximal side of the nail magazine rack and drives the stop portion of the elastic member to move toward the outer side of the cutting groove, the elastic member enters the second state from the first state, and the stop portion of the elastic member disengages from the path of the cutter driving portion moving from the proximal side to the distal side of the nail magazine rack.

2. The staple cartridge assembly of Claim 1, wherein, The stop portion includes a first surface and a second surface. When the elastic member is in the first state, the first surface abuts against the cutter drive portion, hindering the cutter from moving toward the distal side; when the elastic member is in the second state, the second surface abuts against the side wall of the firing block drive portion, and does not hinder the cutter from moving toward the distal side.

3. The cartridge assembly of Claim 2, wherein, In the first state, the distance between the second surfaces of the two elastic members is smaller than the distance between the side walls of the cutter driving portion.

4. The cartridge assembly of Claim 1, wherein, The distance between the two side walls of the firing block driving portion is greater than or equal to the distance between the two side walls of the cutter driving portion.

5. The cartridge assembly of Claim 2, wherein, The stapler assembly further includes a stapler accommodated in the stapler frame, and the stapler further includes an anvil disposed opposite to the stapler, the anvil having a third state of being open relative to the stapler and a fourth state of being closed relative to the stapler; The cutter includes a first position and a second position located on the proximal side of the staple cartridge frame, wherein the first position is located on the proximal side of the second position; When the cutter is in the first position, the anvil is in the third state; when the cutter moves from the first position to the second position, the cutter drives the anvil to enter the fourth state; When the elastic member is in the first state and the anvil is in the fourth state, the first surface abuts against the cutter driving portion.

6. The cartridge assembly of Claim 1, wherein, A first mounting groove is provided on the inner side wall of the tool feeding groove of the nail magazine rack, and the free end of the elastic member at least partially enters the first mounting groove. When the elastic member is in the first state, the width of the first mounting groove corresponding to the free end of the elastic member is greater than the width of the first mounting groove corresponding to the free end of the elastic member when the elastic member is in the second state.

7. The cartridge assembly of Claim 2, wherein, The elastic member is a strip-shaped spring sheet, which further includes a connecting portion and a main body portion. The main body portion is located between the connecting portion and the stop portion, and the connecting portion is connected to the inner side wall of the tool groove.

8. The cartridge assembly of Claim 7, wherein, The connecting portion and the stopping portion of the elastic sheet are respectively arranged on the distal side and the proximal side of the elastic sheet, or the connecting portion and the stopping portion of the elastic sheet are respectively arranged on the proximal side and the distal side of the elastic sheet.

9. The cartridge assembly of Claim 8, wherein, The connecting portion and the stop portion of the elastic sheet are arranged at the distal end side and the proximal end side of the elastic sheet respectively, the proximal end side surface of the stop portion comprises the first surface, and the first surface is perpendicular to the axial direction of the stapler when the elastic sheet is in the first state.

10. The cartridge assembly of Claim 8, wherein, The connecting portion and the stop portion of the elastic sheet are arranged at the proximal end side and the distal end side of the elastic sheet respectively, the proximal end side of the stop portion comprises the first surface, and the first surface is perpendicular to the axial direction of the stapler when the elastic sheet is in the first state.

11. The cartridge assembly of Claim 7, wherein, The elastic sheet is integrally formed with the cartridge holder.

12. The cartridge assembly of Claim 7, wherein, The side wall of the tool travel groove is provided with a second mounting groove, and the connecting portion of the elastic sheet is embedded in the second mounting groove.

13. The cartridge assembly of Claim 7, wherein, The body portion is arranged in a wave shape along the axial direction of the tool travel groove.

14. The cartridge assembly of Claim 1, wherein, The cartridge assembly further comprises a cartridge accommodated in the cartridge holder, one side surface of the cartridge is a cartridge surface, and the firing block driving portion is a protrusion arranged on the side surface of the firing block away from the cartridge surface. The elastic member is arranged on the inner side wall of the tool travel groove, and the elastic member enters the second state when the firing block driving portion is at least partially arranged in the tool travel groove and located at the proximal end side of the cartridge holder.

15. The cartridge assembly of Claim 14, wherein, The proximal end side wall of the protrusion is provided with a guide surface.

16. The cartridge assembly of Claim 1, wherein, The elastic member is arranged on the inner side surface of the bottom plate of the cartridge holder, and the firing block driving portion is an extension portion extending from the proximal end side of the firing block to the proximal end side of the stapler.

17. The cartridge assembly of Claim 1, wherein, The cutter is an I-shaped cutter comprising an upper cross beam and a lower cross beam, and a blade edge is arranged between the upper cross beam and the lower cross beam, and the firing block driving portion is located between the blade edge and the lower cross beam.

18. A surgical stapler comprising: The cartridge assembly comprises any one of the staplers according to claims 1 to 17.

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