Driving mechanism and medical anastomat

Abstract

The application provides a driving mechanism and a medical anastomat, and the driving mechanism comprises a firing handle, a driving member is arranged on the firing handle, the firing handle can be rotated in a first direction, an actuating rod is provided with a rack on one side of the firing handle, a stopper is provided with a stopper part, the stopper part is movably arranged on the side of the actuating rod provided with the rack, and the stopper part can move between a first position area and a second position area; when the stopper part is located in the first position area and the firing handle is rotated in the first direction, the driving member abuts against the stopper part, so that the driving member does not drive the rack to move. According to the application, the stopper part is arranged, when the firing handle is held to be closed, the driving member of the firing handle cannot be matched with the rack due to the stoppage of the stopper part, the rack cannot be driven to move to the distal end side, and the anastomat cannot be fired.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a driving mechanism and a medical anastomat. BACKGROUND

[0002] The medical anastomat comprises a medical anastomat body, a firing handle movably connected to the medical anastomat body, and a staple head cooperating with the body. The staple head comprises a staple cartridge assembly and an anvil oppositely arranged. During surgery, the operator first holds the firing handle, pulls the closure tab to the proximal side of the anastomat through the closure switching mechanism, so as to close the staple cartridge assembly and the anvil, i.e. the closure of the staple head. Then, the operator holds the firing handle again, can push the anastomat staples to the tissue, form the anastomat staples in the anvil through the anastomat staples in the staple cartridge assembly, anastomat the tissue, at the same time, the cutting knife moves to the distal side and cuts the tissue, so as to realize the firing of the anastomat.

[0003] However, in the existing anastomat, the closure of the staple head and the firing of the anastomat are realized by the operator holding the firing handle. During the closure of the staple head by the firing handle, it is expected that the firing driving mechanism of the anastomat can be stably kept in the initial position and the initial state, so as to avoid the misfiring of the anastomat during the closure of the staple head.

[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 away from the operator, i.e. the end closer to the surgical position, is the distal side. SUMMARY

[0005] In view of the problems in the prior art, the present application aims to provide a driving mechanism and a medical anastomat. When the firing handle is held to close the staple head, the firing handle cannot fire the anastomat due to the action of the stopper.

[0006] The present application provides a driving mechanism for a medical anastomat, which comprises:

[0007] The firing handle comprises a driving member, and the firing handle can be rotated in a first direction;

[0008] The actuating rod is provided with a rack on one side of the firing handle;

[0009] The stopper comprises a stopper part, which is movably arranged on the side of the actuating rod provided with the rack, and the stopper part can move between a first position area and a second position area;

[0010] The stop portion is located in the first position region, and when the firing handle is rotated in the first direction, the driving member abuts against the stop portion, so that the driving member does not drive the rack to move.

[0011] In some embodiments, the stop portion at least partially protrudes outside the rack and is axially movable relative to the rack, or the rack is provided with a relief portion on a side facing the firing handle, the stop portion at least partially enters the relief portion and is axially movable relative to the relief portion.

[0012] In some embodiments, the relief portion is a groove provided in a middle portion of the rack and recessed in a direction away from the firing handle.

[0013] In some embodiments, a side surface of the stop portion facing the firing handle is flush with a side surface of the rack facing the firing handle, or a side surface of the stop portion facing the firing handle protrudes from a side surface of the rack facing the firing handle.

[0014] In some embodiments, the first position region is located on a distal side of the second position region, when the stop portion is located in the first position region, the stop portion is located on a distal side of the driving member facing the rack, and when the stop portion is located in the second position region, the stop portion is located on a proximal side of the distal side of the driving member.

[0015] The stop portion is located in the second position region, and when the firing handle is rotated in the first direction, the driving member of the firing handle cooperates with the rack to drive the actuating rod to move in a direction away from a distal end of the anastomat.

[0016] In some embodiments, the stopper further comprises a stopper body and a connecting arm, the stopper body is connected with the stop portion through the connecting arm, and the stopper body is axially movable relative to a housing of the anastomat body.

[0017] In some embodiments, the stopper body is provided with a sliding groove extending in an axial direction, the housing of the anastomat body is provided with a guide block, or the housing of the anastomat body is provided with a sliding groove extending in an axial direction, and the stopper body is provided with a guide block.

[0018] The guide block at least partially enters the sliding groove and is movable along an extension direction of the sliding groove.

[0019] In some embodiments, a switching knob is further included, the switching knob comprises a first cooperating portion and a second cooperating portion, and the switching knob is axially fixed with the housing of the anastomat body.

[0020] The first matching part of the switch knob matches with the stopper body, and the second matching part of the switch knob matches with the stopper body, and the switch knob drives the stopper to move towards the proximal side, so that the stopper part of the stopper enters the second position area.

[0021] In some embodiments, the first matching part has a smaller axial width than the second matching part, and the first matching part and the second matching part are arranged in a transverse direction.

[0022] The first matching part of the switch knob matches with the stopper body, and the second matching part of the switch knob matches with the stopper body, and the switch knob drives the stopper to move towards the proximal side, so that the stopper part of the stopper enters the second position area.

[0023] In some embodiments, the stopper body comprises a receiving cavity comprising oppositely arranged first and second inner walls, and the switch knob comprises first and second sides.

[0024] The first side of the switch knob matches with the first inner wall of the receiving cavity.

[0025] In some embodiments, a spring is arranged between the second side of the switch knob and the second inner wall of the receiving cavity, and the spring allows the stopper part to stay in the first position area or the second position area.

[0026] In some embodiments, the second side of the switch knob is a transversely extending plane, and the first side of the second matching part protrudes towards the proximal side relative to the first side of the first matching part.

[0027] In some embodiments, the first side of the switch knob is provided with a guide surface connected between the first side of the first matching part and the first side of the second matching part.

[0028] In some embodiments, the switch knob is provided with one first matching part and two second matching parts arranged on both sides of the first matching part in the transverse direction.

[0029] In some embodiments, the second matching part is arranged outside the first matching part, and the switch knob further comprises a button part arranged outside the second matching part and at least partially exposed outside the housing of the anastomat.

[0030] In some embodiments, the housing of the anastomat body is provided with a support protruding towards the inside, the stopper body is arranged at the support, and the stopper body can move axially along the support.

[0031] In some embodiments, the stopper body is located at the distal end side of the driving member, the connecting arm comprises a first arm and a second arm connected with each other, the stopper body is connected with the stopper through the second arm and the first arm in sequence, and the stopper is arranged at the proximal end side of the second arm.

[0032] In some embodiments, the second arm extends longitudinally, the first arm extends axially, and the stopper is a protrusion protruding from the proximal end side of the first arm towards the side surface of the firing handle.

[0033] In some embodiments, the proximal end side of the first arm at least partially enters the avoiding part, and the proximal end side of the first arm does not protrude from the side surface of the rack towards the side surface of the firing handle.

[0034] In some embodiments, the side surface of the stopper towards the firing handle is a plane parallel to the axial direction.

[0035] The embodiment of the present application also provides a medical anastomat comprising the above driving mechanism.

[0036] The driving mechanism and the medical anastomat provided by the present application have the following advantages:

[0037] The present application provides a driving mechanism for a medical anastomat. By arranging a stopper, when the firing handle is held to be closed, the driving member of the firing handle cannot be matched with the rack due to the stoppage of the stopper, the rack cannot be driven to move to the distal end side, and the anastomat cannot be fired, thereby improving the safety and effectiveness of the anastomat. BRIEF DESCRIPTION OF DRAWINGS

[0038] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, with reference to the attached drawings.

[0039] Figure 1 FIG. 1 is a structural schematic diagram of an anastomat according to an embodiment of the present application;

[0040] Figure 2 FIG. 2 is a schematic diagram of the anastomat body of the anastomat of FIG. 1 after removing a side shell;

[0041] Figure 3 FIG. 3 is a structural schematic diagram of the cooperation between the shell and the switching assembly of the anastomat of FIG. 1 in an initial state;

[0042] Figure 4 FIG. 4 is a structural schematic diagram of a driving mechanism according to an embodiment of the present application;

[0043] Figure 5Figure 7 is a schematic view of the switching assembly cooperating with the actuating rod in an embodiment of the present application, the stop portion being located in the first position region;

[0044] Figure 6 Figure 8 is a schematic view of the structure of the switching assembly in an embodiment of the present application;

[0045] Figure 7 Figure 9 is a schematic view of the structure of the stop cooperating with the actuating rod in an embodiment of the present application;

[0046] Figure 8 Figure 10 is a schematic view of the structure of the switching assembly in an embodiment of the present application, the stop portion being located in the first position region;

[0047] Figure 9 Figure 11 is a schematic view of the structure of the switching knob in an embodiment of the present application;

[0048] Figure 10 Figure 12 is a schematic view of the structure of the driving assembly when the firing handle is held in an embodiment of the present application;

[0049] Figure 11 Figure 13 is a schematic view of the structure of the driving assembly when the staple head is closed in an embodiment of the present application;

[0050] Figure 12 Figure 14 is a schematic view of the structure of the switching assembly in an embodiment of the present application, the stop portion being located in the second position region;

[0051] Figure 13 Figure 15 is a schematic view of the structure of the switching assembly cooperating with the housing in an embodiment of the present application;

[0052] Figure 14 Figure 16 is a schematic view of the pawl of the firing handle cooperating with the stop in an embodiment of the present application, the stop portion being located in the second position region;

[0053] Figure 15 Figure 17 is a schematic view of the structure of the driving assembly in an embodiment of the present application, the stop portion being located in the second position region.

[0054] Reference signs:

[0055] 1 anastomat body 45 third pin shaft

[0056] 11 fixed handle 5 closure pull rod assembly

[0057] 13 housing 51 outer sleeve portion

[0058] 14 support 52 second driving portion

[0059] 15 handle return spring 7 switching knob

[0060] 16 button hole 71 first cooperating portion

[0061] 17 guide block 72 second engaging portion

[0062] 18 connecting rod 73 connecting portion

[0063] 2 actuating rod 731 guide surface

[0064] 21 rack 74 button portion

[0065] 211 avoidance portion 8 stopper

[0066] 212 tooth 81 stopper body

[0067] 3 trigger 811 sliding groove

[0068] 31 driver 812 accommodating cavity

[0069] 32 first driving portion 82 connecting arm

[0070] 4 linkage assembly 821 first arm

[0071] 41 first rod 822 second arm

[0072] 412 first pivot portion 83 stop portion

[0073] 413 third pivot portion 84 compression spring

[0074] 42 second rod 9 peg head portion

[0075] 422 second pivot portion 91 anvil

[0076] 423 fourth pivot portion 911 first engaging groove

[0077] 43 first pin 92 nail cartridge assembly

[0078] 44 second pin 921 second engaging groove DETAILED DESCRIPTION

[0079] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can 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 embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and description thereof will not be repeated.

[0080] The application provides a driving mechanism for a medical anastomat and a medical anastomat comprising the same. The anastomat further comprises a staple head and an anastomat body, and the staple head is arranged at the distal end side of the anastomat body. The driving mechanism comprises a firing handle comprising a driving member, the firing handle being rotatable in a first direction; an actuating rod, the actuating rod being provided with a rack on one side of the firing handle; and a stopper comprising a stopper part, the stopper part being movably arranged on the side of the actuating rod provided with the rack, and the stopper part being movable between a first position region and a second position region. When it is required to close the staple head, the stopper part is located in the first position region. At this time, the firing handle is operated to rotate the firing handle in the first direction, the driving member abuts against the stopper part to separate the driving member from the rack, the driving member does not drive the rack to move, and thus the driving member cannot drive the rack to move in the distal end side direction, and the anastomat cannot be fired.

[0081] The structure of the driving mechanism of each specific embodiment of the application will be described in detail below with reference to the drawings. It should be understood that each specific embodiment is not a limitation on the protection scope of the application.

[0082] As shown in Figures 1-15 , an embodiment of the application provides a closure switching mechanism for a medical anastomat and a medical anastomat comprising the same. As shown in Figure 1 , the anastomat further comprises a staple head 9, an anastomat body 1, and a firing handle 3, the firing handle 3 being movably connected to the anastomat body 1, and the staple head 9 being arranged at the distal end side of the anastomat body 1. The anastomat body 1 comprises a housing 13, and one side of the housing 13 is provided with a fixed handle 11. The inside of the housing 13 is provided with a connecting rod 18, and the inside of the connecting rod 18 is provided with a closure pull tab (not shown in the figure) for closing the staple head 9, and the distal end side of the closure pull tab is connected to the staple head 9.

[0083] In the application, the distal end side and the proximal end side are relative to the operator, the end closer to the operator is the proximal end side, the end farther from the operator, i.e., the end closer to the surgical position is the distal end side, and the direction along the axis of the anastomat is the axial direction, i.e., the direction from the distal end side of the anastomat to the proximal end side, or the direction from the proximal end side of the anastomat to the distal end side. For example, in the perspective view of Figure 1 , the distal end side of the anastomat is the left side, and the proximal end side is the right side. Figure 1 In the S1 direction in , the direction from the proximal end side of the anastomat to the distal end side is defined. The S1 direction and / or the direction opposite to the S1 direction is defined as the axial direction of the anastomat. The S2 direction in Figure 3 is defined as the longitudinal direction, i.e., the height direction. The S2 direction and / or the direction opposite to the S2 direction is defined as the transverse direction of the anastomat. Figure 3In this context, S3 is the horizontal direction, i.e., the width direction.

[0084] like Figure 1 As shown, the nail head 9 includes an anvil 91 and a nail cartridge assembly 92 disposed opposite to each other. The proximal end of the anvil 91 is rotatably connected to the proximal end of the nail cartridge assembly 92, allowing the anvil 91 to be in an open state and a closed state relative to the nail cartridge assembly 92. Specifically, the proximal end of the anvil 91 is provided with a first mating groove 911, and the proximal end of the nail cartridge assembly 92 is provided with an axially extending second mating groove 921. A closing pin passes through the first mating groove 911, the second mating groove 921, and the distal end of the closing tab. When the closing tab moves towards the proximal end, the closing pin also moves towards the proximal end, causing the anvil 91 to move toward the nail cartridge assembly 92 and close the nail head 9. When the closing tab moves towards the distal end, the closing pin also moves towards the distal end, causing the anvil 91 to move away from the nail cartridge assembly 92 and open the nail head 9.

[0085] like Figure 2 As shown, in this embodiment, the driving mechanism includes a firing handle 3, a braking lever 2, and a stop 9. The firing handle 3 includes a driving member 31, which is pivotally connected to the housing of the stapler body 1 and can rotate relative to the stapler body 1 in a first direction. The actuating rod 2 has a rack 21 on the side facing the firing handle 3. The stop 8 includes a stop portion 83, which is at least partially movable on the side of the actuating rod 2 where the rack 21 is located. The stop portion 83 can move between a first position region and a second position region. When it is necessary to close the staple head 9, the stop portion 83 is located in the first position region. At this time, operating the firing handle 3 causes it to rotate in the first direction, and the driving member 31 abuts against the stop portion 83, so that the driving member 31 is separated from the rack 21. Therefore, the driving member 31 cannot drive the rack 21 to move in the distal direction, and thus the stapler cannot be fired.

[0086] Furthermore, in this embodiment, the stop portion 83 further includes a second position region located proximal to the first position region. For example, Figure 4 and Figure 5The stop portion 83 shown is in the first position region. When the stop portion 83 is in the first position region, it is located on the side of the drive member 31 facing the rack 21 at its distal end. The surface of the stop portion 83 facing the firing handle 3 is flush with the surface of the rack 21 facing the firing handle 3, or the surface of the stop portion 83 facing the firing handle 3 protrudes beyond the surface of the rack 21 facing the firing handle 3. This ensures that the drive member 31 cannot enter between the teeth 212 of the rack 21 due to the stopping effect of the stop portion 83. At this time, operating the firing handle 3 causes it to rotate in the first direction. The drive member 31 abuts against the stop portion 83. Due to the stopping effect of the stop portion 83, the drive member 31 separates from the rack 21 and cannot engage with the teeth 212 of the rack 21, thus preventing the engagement of the stapler. Figure 14 and Figure 15 The stop portion 83 shown is located in the second position region, where it is positioned proximal to the distal end of the drive member 31. When the firing handle 3 is operated to rotate in the first direction, the drive member 31 of the firing handle 3 is no longer stopped by the stop portion 83 and can engage with the teeth 212 of the rack 21, driving the actuator 2 towards the distal end of the stapler, thus firing the stapler.

[0087] like Figures 1-3 As shown, in this embodiment, the driving mechanism further includes a switching button 7, which controls the axial movement of the stop portion 83, enabling the stop portion 83 to switch positions between a first position region and a second position region. The switching button 7 and the stop portion 8 form a switching assembly. The switching button 7 includes a button portion 74, a first mating portion 71, and a second mating portion 72. The housing 13 is provided with a button hole 16, and the button portion 74 of the switching button 7 passes through the button hole 16 and at least partially protrudes outside the housing 13 of the stapler body 1. Therefore, the switching button 7 is axially fixed to the housing 13 of the stapler body 1, meaning that the switching button 7 will not move axially relative to the stapler body 1. When the first mating portion 71 of the switching button 7 engages with the stop portion 81, the stop portion 83 is located in the first position region; when the second mating portion 72 of the switching button 7 engages with the stop portion 81, the stop portion 83 is located in the second position region. The specific structure and operation of the switching assembly will be described in detail below.

[0088] The driving mechanism of the present application can be used in combination with various closure mechanisms. In this embodiment, the closure mechanism comprises a link assembly 4 and a closure pull rod assembly 5. It should be understood that the present application is not limited thereto, and other structures that can be driven by the firing handle 3 to close the staple head 9 can also be used in combination with the driving mechanism of the present application. As shown in Figure 4 In this embodiment, the closure mechanism comprises the link assembly 4 and the closure pull rod assembly 5. The link assembly 4 comprises a first rod 41 and a second rod 42, the second rod 42 is located on the proximal end side of the first rod 41, the first rod 41 comprises a first pivot joint 412 and a third pivot joint 413, and the second rod 42 comprises a second pivot joint 422 and a fourth pivot joint 423. The first pivot joint 412 is pivotally connected to the housing 13 of the stapler body 1 by a first pin shaft 43, so that the first pivot joint 412 is relatively fixed with the housing 13 of the stapler body 1 in the axial direction. The third pivot joint 413 is pivotally connected to the fourth pivot joint 423 by a second pin shaft 44, and the second pivot joint 422 is pivotally connected to the closure pull rod assembly 5 by a third pin shaft 45, so that the second pivot joint 422 is relatively fixed with the closure pull rod assembly 5 in the axial direction. The closure pull rod assembly 5 is fixedly connected to the proximal end side of the closure pull tab, so that the axial movement of the closure pull rod assembly 5 can drive the axial movement of the closure pull tab. The closure pull rod assembly 5 comprises an outer sleeve 51 sleeved on the outside of the connecting rod 18 and a second driving part 52 pivotally connected to the second pivot joint 422.

[0089] In this embodiment, the link assembly 4 comprises a first state and a second state, both of which are relatively balanced states. As shown in Figure 4 In the initial state, the link assembly 4 is in the first state, and the link assembly 4 is in a relatively compact state, i.e. the axial distance between the first pivot joint 412 and the second pivot joint 422 is small. By holding the firing handle 3, the link assembly 4 can be driven from the first state to the second state. As shown in Figure 8 and Figure 9 When the link assembly 4 enters the second state, the link assembly 4 enters a relatively expanded state, the axial distance between the first pivot joint 412 and the second pivot joint 422 increases, the second pivot joint 422 drives the closure pull rod assembly 5 to move in the proximal end direction, and the closure pull rod assembly 5 drives the closure pull tab to move in the proximal end direction to close the staple head 9.

[0090] The specific structure and working process of the driving mechanism and the closure mechanism of this embodiment will be described in detail below. Figures 2-15 Figures 2-9 ​The structure of the driving mechanism and the closing mechanism in the initial state is shown. In this embodiment, the rack 21 is provided with a relief portion 211 on the side facing the firing handle 3, the stop portion 83 at least partially enters the relief portion 211 and can axially move relative to the relief portion 211. In this embodiment, the relief portion 211 is a groove provided on the middle portion of the rack 21 and recessed in the direction away from the firing handle 3. In another alternative embodiment, the stop portion 83 can be provided on the outer side of the rack 21 and can axially move relative to the rack 21.

[0091] As shown in the drawings, Figures 2-4 In this embodiment, the stopper body 81 is provided with a sliding groove 811 extending in the axial direction, the housing 13 of the anastomat body 1 is provided with a guide block 17, the guide block 17 at least partially enters the sliding groove 811 and can move along the extension direction of the sliding groove 811, so as to realize that the stopper body 81 can axially move relative to the housing 13 of the anastomat body 1, and limit that the stopper body 81 cannot longitudinally move relative to the housing 13 of the anastomat body 1. The sliding groove 811 includes a first segment and a second segment, and the first segment is located on the proximal side of the second segment. In the initial state, the guide block 17 is located in the first segment of the sliding groove 811, when the stopper 8 moves in the proximal direction, the sliding groove 811 moves in the proximal direction relative to the guide block 17, so that the guide block 17 enters the second segment of the sliding groove 811. In another alternative embodiment, the housing 13 of the anastomat body 1 can be provided with a sliding groove extending in the axial direction, and the stopper body 81 is provided with a guide block which at least partially enters the sliding groove and can move along the extension direction of the sliding groove. The firing handle 3 includes a driving member 31 and a first driving portion 32, the driving member 31 is a jaw rotatably connected to the firing handle 3, and the first driving portion 32 is oppositely arranged with the first rod 41 of the linkage assembly 4. A handle return spring 15 is arranged between the firing handle 3 and the housing 13 of the anastomat body 1, which can be a tension spring, but the present application is not limited thereto. The housing 13 of the anastomat body 1 is provided with a support 14 protruding inwardly, the stopper body 81 is arranged at the support 14, and the stopper body 81 can axially move along the support 14.

[0092] As shown in the drawings, Figures 4-7As shown, the stopper 8 further comprises a stopper body 81 and a connecting arm 82, the stopper body 81 is connected with the stopper portion 83 through the connecting arm 82, and the stopper body 81 is axially movable relative to the housing 13 of the stapler body 1. The stopper body 81 is located at the distal end side of the driving member 31. The connecting arm 82 comprises a first arm 821 and a second arm 822 connected with each other, the stopper body 81 is connected with the stopper portion 83 in sequence through the second arm 822 and the first arm 821, and the stopper portion 83 is a protruding block protruding from the proximal end side of the first arm 821 towards the direction of the firing knob 3. In this embodiment, the second arm 822 extends longitudinally, and the first arm 821 extends axially, but the present application is not limited thereto, and the connecting arm 82 can also adopt other structures, as long as the axial movement of the stopper body 81 can drive the axial movement of the stopper portion 83. The stopper portion 83 can be integrally provided with the connecting arm 82, or can be two separately formed pieces fixedly connected with each other.

[0093] As shown in Figure 4 and Figure 5 , in the initial state, the stopper portion 83 is located in the first position region, and the stopper portion 83 is located on the side of the distal end of the driving member 31 facing the rack 21, and the side surface of the stopper portion 83 facing the firing knob 3 (i.e. the lower surface of the stopper portion 83 in the perspective view of Figure 4 ) is flush with the side surface of the rack 21 facing the firing knob 3 (i.e. the lower surface of the rack 21 in the perspective view of Figure 4 ), or the side surface of the stopper portion 83 facing the firing knob 3 protrudes from the side surface of the rack 21 facing the firing knob 3. The distal end of the driving member 31 abuts against the side surface of the stopper portion 83 facing the firing knob 3, and under the stop action of the stopper portion 83, the distal end of the driving member 31 cannot enter the middle of the teeth 212 of the rack 21. In this embodiment, the side surface of the stopper portion 83 facing the firing knob 3 is a plane parallel to the axial direction.

[0094] As shown in Figures 5-9 , the switching knob 7 comprises a first matching portion 71 and a second matching portion 72, and the switching knob 7 is axially fixed with the housing 13 of the stapler body 1. The axial width of the first matching portion 71 is smaller than the axial width of the second matching portion 72, and the first matching portion 71 and the second matching portion 72 are arranged in the transverse direction. The stopper body 81 comprises a receiving cavity 812 comprising a first inner wall and a second inner wall arranged opposite to each other, and in the perspective view of Figure 6 , the first inner wall of the receiving cavity 812 is the right inner wall, and the second inner wall is the left inner wall.

[0095] like Figures 5-9 As shown, the switch button 7 includes a first side and a second side, in Figure 6 From the perspective of [the viewpoint], the first side of the switch button 7 is the right side, and the second side is the left side. The second side of the switch button 7 is generally a plane extending laterally. The first side of the second mating part 72 of the switch button 7 protrudes towards the proximal end relative to the first side of the first mating part 71, such that the axial width of the first mating part 71 is smaller than the axial width of the second mating part 72. The switch button 7 at least partially enters the receiving cavity 812. The first side of the switch button 7 mates with the first inner wall of the receiving cavity 812, and an elastic element is provided between the second side of the switch button 7 and the second inner wall of the receiving cavity 812. The elastic element can maintain the state of the switch button 7 to keep the stop part 83 in the first position region or the second position region. When the first mating part 71 of the switch button 7 mates with the first inner wall of the receiving cavity 812, the elastic element can provide a biasing force to the second side of the switch button 7, so that when no external force is applied, the stop part 83 stays in the first position region. In this embodiment, a compression spring 84 is used as an example of the elastic element. However, the invention is not limited to this. In other alternative embodiments, the elastic element can also be a spring sheet, an elastic block, or other types of elastic elements, or a tension spring located in another position. The second mating part 72 and the first mating part 71 of the switching button 7 are arranged laterally. Therefore, by driving the switching button 7 to move laterally, different mating parts of the switching button 7 can be mated with the stop body 81. In this embodiment, the second mating part 72 is located outside the first mating part 71, and the button part 74 is located outside the second mating part 72. By pressing the button part 74, the lateral movement of the switching button 7 can be controlled. Specifically, when the first mating part 71 of the switching button 7 is mated with the first inner wall of the receiving cavity 812, the guide block 17 is located in the first section of the slide groove 811. By pressing the button 74, the switch button 7 moves laterally until the second mating part 72 of the switch button 7 mates with the first inner wall of the accommodating cavity 812. The switch button 7 then drives the stop member 8 to move towards the proximal side, causing the stop part 83 of the stop member 8 to enter the second position area.

[0096] like Figure 8 and Figure 9As shown, in this embodiment, a guide surface 731 is provided on the first side of the switching button 7. The guide surface 731 connects the first side of the first mating part 71 and the first side of the second mating part 72. The guide surface 731 is an inclined surface for transition between the first mating part 71 and the second mating part 72. The portion between the first mating part 71 and the second mating part 72 with the guide surface 731 is defined as the connecting part 73. This makes the movement of the stop body 81 towards the proximal side smoother. In this embodiment, the switching button 7 is provided with one first mating part 71, two second mating parts 72, and two button parts 74. The two second mating parts 72 are provided on both sides of the first mating part 71 in the lateral direction, and the two button parts 74 are respectively provided on the outer side of the two second mating parts 72. The switching button 7 is symmetrical with respect to the center line of the first mating part 71. In another alternative embodiment, only one second mating part 72 may be provided.

[0097] exist Figure 4 In this state, the stop part 83 is located in the first position area, and the operator holds the firing handle 3, such that the firing handle 3 moves along the first direction ( Figure 4 When the handle rotates in the R1 direction, the return spring 15 of the handle undergoes elastic deformation, the distal end of the drive member 31 abuts against the stop portion 83, and moves along the lower surface of the stop portion 83 without driving the rack 21 to move. During this process, the first drive part 32 of the firing handle 3 drives the first rod 41 of the linkage assembly 4 to rotate counterclockwise around the first pivot portion 412, and the second rod 42 rotates clockwise, entering the... Figure 10 The linkage assembly 4 enters the second state. The second pivot portion 422 moves towards the proximal end, thereby driving the second drive portion 52 of the closing lever assembly 5 to move towards the proximal end. The outer sleeve portion 51 of the closing lever assembly 5 drives the closing tab to move towards the proximal end, while closing the pin head 9. At this time, the linkage assembly 4 is in a relatively stable second state. Even if the operator releases the firing handle 3, the firing handle 3 moves along the handle return spring 15 under the force of the return spring. Figure 10 The stapling rotates in the R2 direction to return to its initial position. The connecting rod assembly 4 remains in the second state, and the closing pull rod assembly 5 remains in the position where the staple head 9 is closed, i.e., the stapler enters... Figure 11 The state shown. Figure 11 As shown, at this time, the distal end of the drive member 31 is still abutting against the stop part 83 and cannot enter between the teeth 212 of the rack 21. Even if the firing handle 3 is grasped again at this time, the stapler cannot be fired.

[0098] like Figure 12 and Figure 13As shown, after the stapler head 9 closes, the operator presses the button 74, causing the switching knob 7 to move laterally. Guided by the guide surface 731, the switching knob 7 moves laterally relative to the stop body 81, causing the first side of the second mating part 72 of the switching knob 7 to mate with the first inner wall of the receiving cavity 812 of the stop body 81. Driven by the switching knob 7, the stop body 81 moves proximally, and the slide 811 moves proximally relative to the guide block 17 of the housing 13, with the guide block 17 entering the second section of the slide 811. The stop body 81, through the connecting arm 82, drives the stop part 83 to move proximally, causing the stop part 83 to move to the second position region, i.e. Figure 14 and Figure 15 The area where the stop 83 is located is shown. Meanwhile, as... Figures 12-14 As shown, when the stop portion 83 is in the second position region, the stop body 81 and the switch button 7 compress the spring 84, causing the spring 84 to elastically deform. The spring 84 provides the switch button 7 with a biasing force towards the proximal side. Under the action of this biasing force, the second mating portion 72 of the switch button 7 can also maintain a tight fit between the first inner wall of the receiving cavity 812, keeping the stop portion 83 in the second position region. Figure 14 and Figure 15 As shown, when the stop portion 83 is located in the second position region, the stop portion 83 is located on the proximal side of the drive member 31 and no longer obstructs the distal end of the drive member 31. The distal end of the drive member 31 at least partially enters between the teeth 212 of the rack 21. The proximal side of the first arm 821 of the stop member 8 also at least partially enters the clearance portion 211, and the proximal side of the first arm 821 facing the firing handle 3 does not protrude from the side surface of the rack 21 facing the firing handle 3, nor does it obstruct the distal end of the drive member 31 from entering between the teeth 212 of the rack 21. Therefore, in Figure 15 In this state, grip the firing handle 3 again and let it move along Figure 15 When rotated in the R1 direction, the driving member 31 of the firing handle 3 cooperates with the rack 21, driving the rack 21 to move towards the distal end of the stapler. The rack 21 drives the entire actuator rod 2 to move towards the distal end, thereby firing the stapler.

[0099] After the anastomosis device fires, the switching component is in [position / state]. Figure 12 In the shown state, press the switch button 7 on the other side of the button 74. Figure 12When the button part 74) on the middle right is pressed, under the guidance of the guide surface 731, the switching knob 7 moves horizontally to the first matching part 71 matches with the first inner wall of the accommodating cavity 812, at this time, the switching assembly returns to the original position again Figure 9 The state shown, that is, the stopper body 81 moves to the distal end side, the stopper body 81 drives the stopper 83 to move to the distal end side through the connecting arm 82, and the stopper 83 is located on the side of the driving part 31 towards the rack 21 again, and the driving part 31 and the lower surface of the stopper 83 abut.

[0100] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application 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 shall be considered as falling within the protection scope of the present application.

Claims

1. A driving mechanism, characterized in that, For use in medical staplers, the drive mechanism includes: A firing handle, including a drive component, wherein the firing handle is rotatable in a first direction; An actuator rod, wherein a rack is provided on the side of the actuator rod facing the firing handle; A stop member includes a stop portion, which is at least partially movably disposed on the side of the actuating rod on which a rack is provided, and the stop portion is movable between a first position region and a second position region; A switching button, the switching button including a first mating part and a second mating part, wherein when the first mating part of the switching button mates with the stop member, the stop member is located in the first position region, and when the second mating part of the switching button mates with the stop member, the stop member is located in the second position region; Wherein, the stop portion is located in the first position region, and when the firing handle rotates along the first direction, the driving member abuts against the stop portion, so that the driving member does not drive the rack to move.

2. The driving mechanism according to claim 1, characterized in that, The stop portion protrudes at least partially from the outside of the rack and is axially movable relative to the rack; alternatively, the rack has a clearance portion on the side facing the firing handle, the stop portion at least partially enters the clearance portion, and is axially movable relative to the clearance portion.

3. The driving mechanism according to claim 2, characterized in that, The clearance portion is a recessed groove located in the middle of the rack, facing away from the firing handle.

4. The driving mechanism according to claim 2, characterized in that, The side surface of the stop portion facing the firing handle is flush with the side surface of the rack facing the firing handle, or the side surface of the stop portion facing the firing handle protrudes beyond the side surface of the rack facing the firing handle.

5. The driving mechanism according to claim 4, characterized in that, The first position region is located on the distal side of the second position region. When the stop portion is located in the first position region, the stop portion is located on the side of the distal end of the drive member facing the rack. When the stop portion is located in the second position region, the stop portion is located on the proximal side of the distal end of the drive member. When the stop portion is located in the second position region and the firing handle rotates along the first direction, the driving member of the firing handle engages with the rack to drive the actuator rod to move toward the distal end of the anastomosis device.

6. The driving mechanism according to claim 5, characterized in that, The stop also includes a stop body and a connecting arm. The stop body is connected to the stop portion via the connecting arm. The stop body can move axially relative to the housing of the anastomosis device body.

7. The driving mechanism according to claim 6, characterized in that, The stop body is provided with an axially extending groove, and the housing of the stapler body is provided with a guide block; or, the housing of the stapler body is provided with an axially extending groove, and the stop body is provided with a guide block. The guide block enters at least partially into the slide groove and is movable along the extension direction of the slide groove.

8. The driving mechanism according to claim 6, characterized in that, The switching knob is axially fixed to the housing of the anastomosis device body; When the first mating part of the switch button mates with the stop body, the stop part is located in the first position area; when the second mating part of the switch button mates with the stop body, the stop part is located in the second position area.

9. The driving mechanism according to claim 8, characterized in that, The width of the first mating part along the axial direction is smaller than the width of the second mating part along the axial direction, and the first mating part and the second mating part are arranged in the transverse direction; When the first mating part of the switching button engages with the body of the stop member, and the switching button moves laterally until the second mating part of the switching button engages with the body of the stop member, the switching button drives the stop member to move towards the proximal side, so that the stop part of the stop member enters the second position region.

10. The driving mechanism according to claim 9, characterized in that, The stop body includes a receiving cavity, the receiving cavity includes a first inner wall and a second inner wall disposed opposite to each other, and the switching button includes a first side and a second side; The switching button is at least partially inserted into the receiving cavity, and the first side of the switching button mates with the first inner wall of the receiving cavity.

11. The driving mechanism according to claim 10, characterized in that, An elastic element is provided between the second side of the switching button and the second inner wall of the accommodating cavity, and the elastic element causes the stop portion to remain in the first position area or the second position area.

12. The driving mechanism according to claim 10, characterized in that, The second side of the switch button is a plane extending laterally, and the first side of the second mating part of the switch button protrudes towards the proximal side relative to the first side of the first mating part.

13. The driving mechanism according to claim 12, characterized in that, The first side of the switching button is provided with a guide surface, which is connected between the first side of the first mating part and the first side of the second mating part.

14. The driving mechanism according to claim 9, characterized in that, The switching button is provided with a first mating part and two second mating parts, with the two second mating parts located on both sides of the first mating part along the lateral direction.

15. The driving mechanism according to claim 9, characterized in that, The second mating part is disposed outside the first mating part, and the switching button also includes a button part located outside the second mating part, the button part being at least partially exposed outside the housing of the stapler.

16. The driving mechanism according to claim 9, characterized in that, The housing of the stapler body is provided with an inwardly protruding support member, and the stop member body is disposed at the support member, and the stop member body can move axially along the support member.

17. The driving mechanism according to claim 6, characterized in that, The stop body is located on the distal end of the drive member. The connecting arm includes a first arm and a second arm connected to each other. The stop body is connected to the stop portion in sequence through the second arm and the first arm. The stop portion is located on the proximal end of the second arm.

18. The driving mechanism according to claim 17, characterized in that, The second arm extends longitudinally, the first arm extends axially, and the stop is a protrusion that protrudes from the proximal end of the first arm toward the firing handle.

19. The driving mechanism according to claim 18, characterized in that, The proximal side of the first arm is at least partially inserted into the clearance portion, and the proximal side of the first arm facing the firing handle does not protrude from the rack facing the firing handle.

20. The driving mechanism according to claim 1, characterized in that, The surface of the stop portion facing the firing handle is a plane parallel to the axial direction.

21. A medical stapler, characterized in that, Includes the drive mechanism according to any one of claims 1 to 20.

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