Medical stapler

Abstract

The present invention provides a medical stapler, comprising a stapler body, including a shell and a firing mechanism; an anvil assembly that can move along the axial direction of the stapler body; a safety mechanism that switches the firing mechanism between a non-firing state and a firing state, and the safety mechanism comprises: a safety assembly having a first position area that puts the firing mechanism in a non-firing state and a second position area that is in a firing state; a transmission member, during the process of the anvil assembly moving toward the proximal end, the anvil assembly acts on the transmission member, thereby driving the safety assembly to move from the first position area to the second position area; a transverse guide structure for guiding the transverse movement of the safety assembly along the stapler body; the doctor can be effectively prevented from firing staples and cutters when the anvil assembly is not fully closed, resulting in poor staple formation and even medical accidents; a transverse guide structure for guiding the transverse movement of the safety assembly is provided to enhance the stability of the movement of the safety assembly.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a medical stapler. Background Art

[0002] A medical stapler is a medical device that is often used during surgical sutures of the esophagus, intestines and other digestive tracts, as well as physiological tissues such as the foreskin. During the anastomosis, the two sections of tissue are retracted to form an annular anastomosis ring inside the tissue. The medical stapler can discharge the body's bleeding produced during the operation along with the contents, making it easier for the tissue to heal after the operation.

[0003] The existing medical staplers used for treating digestive tract, prepuce hyperplasia, etc. generally include a stapler body, a firing handle rotatably connected to the stapler body, and an anvil assembly disposed at the distal end of the stapler body. The stapler body includes a housing, a staple cartridge assembly disposed at the distal end of the housing and cooperating with the anvil assembly, and a staple push rod disposed in the housing and linked to the firing handle.

[0004] When the anvil assembly is closed in place, the medical stapler reaches a firing state. In the prior art, surgeons generally judge whether the medical stapler reaches the firing state by their own feelings, and fire the stapler and the cutter after the medical stapler reaches the firing state.

[0005] However, on the one hand, the surgeon completely relies on his or her own feeling and experience to judge, which may easily lead to the anvil assembly not being closed properly and causing poor staple formation; on the other hand, some careless or inexperienced doctors may mistakenly fire the staple and the cutter when the anvil assembly is not closed properly, resulting in poor staple formation and even medical accidents.

[0006] In view of this, it is necessary to provide a new medical stapler to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a medical stapler.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a medical stapler, comprising:

[0009] The stapler body comprises a shell and a firing mechanism arranged on the shell;

[0010] an anvil assembly, wherein the anvil assembly can move along the axial direction of the stapler body;

[0011] A safety mechanism movably disposed between the anvil assembly and the firing mechanism, the safety mechanism switches the firing mechanism between an unfireable state and a fireable state, and the safety mechanism has:

[0012] A safety assembly, movably disposed in the housing, and having a first position region for placing the firing mechanism in an unfireable state and a second position region for placing the firing mechanism in a fireable state;

[0013] A transmission member is provided between the anvil assembly and the safety assembly. When the anvil assembly moves toward the proximal direction, the anvil assembly acts on the transmission member to drive the transmission member to move, thereby driving the safety assembly to move from the first position area to the second position area.

[0014] The transverse guide structure is used to guide the safety component to move between the first position area and the second position area along the transverse direction of the stapler body.

[0015] As a further improved technical solution of the present invention, the lateral guide structure includes a first guide member arranged on the shell, and a second guide member arranged on the safety component. The first guide member cooperates with the second guide member to enable the safety component to move laterally along the anastomosis device body.

[0016] As a further improved technical solution of the present invention, the first guide member and the second guide member are a slide groove and a slider that cooperate with each other, the slide groove extends along the lateral direction of the stapler body, and the slider is arranged on the safety component.

[0017] As a further improved technical solution of the present invention, a marking portion is provided on the safety mechanism, and an observation port is provided on the housing for exposing the marking portion so as to observe the position of the safety mechanism.

[0018] As a further improved technical solution of the present invention, the marking portion includes a first marking portion arranged at intervals and a second marking portion different from the first marking portion, and when the safety mechanism is located in a first position area, the first marking portion is exposed from the observation port; when the safety mechanism is located in a second position area, the second marking portion is exposed from the observation port.

[0019] As a further improved technical solution of the present invention, the first marking portion is red and the second marking portion is green.

[0020] As a further improved technical solution of the present invention, the marking portion is arranged on the sliding block.

[0021] As a further improved technical solution of the present invention, the first position area is closer to the axis of the stapler body than the second position area; the safety component has a base and a locking part connected to the base to cooperate with the firing mechanism, when the safety component is located in the first position area, the locking part locks the firing mechanism, and when the safety component is located in the second position area, the locking part unlocks the firing mechanism.

[0022] As a further improved technical solution of the present invention, the firing mechanism includes a nail pushing rod movably arranged in the shell and a firing handle pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the stapler body; the second position area is closer to the axis of the stapler body than the first position area, and when the safety component is located in the first position area, the firing handle and the nail pushing rod cannot be linked to each other, and when the safety component is located in the second position area, the firing handle and the nail pushing rod can be linked to each other.

[0023] As a further improved technical solution of the present invention, the nail pushing rod and the firing handle are axially spaced and relatively arranged with a first connecting portion and a second connecting portion, and a guide channel is formed between the first connecting portion and the second connecting portion; when the safety component is located in the first position area, the safety component is not in the guide channel, and when the safety component is located in the second position area, at least part of the structure of the safety component enters the guide channel to connect the nail pushing rod and the firing handle.

[0024] As a further improved technical solution of the present invention, the safety component has a base movably connected to the shell, and the transverse guide structure is arranged on the base to guide the transverse movement of the base along the stapler body.

[0025] As a further improved technical solution of the present invention, the safety assembly also has a linkage member cooperating with the base, and the linkage member can move along the axial direction of the stapler body; during the process of the anvil assembly moving in the proximal direction, the anvil assembly acts on the transmission member, and the base is driven to move laterally through the transmission member, and the base pushes the linkage member so that at least part of the structure of the linkage member extends into the guide channel.

[0026] As a further improved technical solution of the present invention, the transmission member has a supporting portion cooperating with the anvil assembly and a transmission rod extending from the supporting portion to the proximal end, and the base cooperates with the inclined surface of the transmission rod to drive the base to move to the second position area.

[0027] As a further improved technical solution of the present invention, the safety mechanism further includes a reset mechanism, and the reset mechanism drives the safety component to move from the second position area to the first position area.

[0028] As a further improved technical solution of the present invention, the medical stapler is a circumcision stapler, and the distal end of the anvil assembly is provided with a glans cavity for accommodating the glans.

[0029] The beneficial effects of the present invention are as follows: the medical stapler of the present invention, by providing a safety mechanism, will enable the firing mechanism to be in a firing state only when the anvil assembly is closed in place, thereby effectively preventing the doctor from firing the staplers and the cutter when the anvil assembly is not closed in place, resulting in poor staple formation and even medical accidents; at the same time, a lateral guide structure is provided to guide the lateral movement of the safety component along the stapler body, thereby enhancing the stability of the movement of the safety component. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the medical stapler in the first embodiment of the present invention.

[0031] Figure 2 yes Figure 1 A schematic structural diagram of the medical stapler shown in FIG.

[0032] Figure 3 yes Figure 2 A cross-sectional view of the medical stapler taken along the AA axis when the anvil assembly is not closed into place.

[0033] Figure 4 yes Figure 3 Enlarged view of point B in FIG.

[0034] Figure 5 yes Figure 4 Schematic diagram of the structure of insurance institutions.

[0035] Figure 6 yes Figure 1 The schematic diagram of the structure of the medical stapler after removing the shell is shown.

[0036] Figure 7 yes Figure 1 A schematic structural diagram of a stapler push rod in a medical stapler is shown.

[0037] Figure 8 yes Figure 2 A cross-sectional view of the medical stapler taken along the AA direction after the anvil assembly is closed in place and the handle is grasped.

[0038] Fig. 9 yes Figure 2A cross-sectional view of the medical stapler taken along the AA axis after the anvil assembly is closed into place.

[0039] Fig.10 yes Figure 2 A cross-sectional view of the medical stapler taken along the AA direction after the anvil assembly is closed in place and the handle is grasped.

[0040] Fig.11 It is a schematic structural diagram of a medical stapler in the second embodiment of the present invention.

[0041] Fig.12 yes Fig.11 A cross-sectional view of the medical stapler taken along the CC axis when the anvil assembly is not closed into place.

[0042] Fig.13 yes Fig.12 Magnified view of point D in .

[0043] Fig.14 yes Fig.11 Schematic diagram of the structure of insurance institutions.

[0044] Fig.15 yes Fig.11 A cross-sectional view of the medical stapler taken along the CC axis when the anvil assembly is closed into place. DETAILED DESCRIPTION

[0045] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. Figures 1 to 15 It is shown as a preferred embodiment of the present invention. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformation or replacement of functions, methods, or structures made by ordinary technicians in the field according to these embodiments shall fall within the protection scope of the present invention.

[0046] The words expressing position and direction described in the present invention are all based on the instrument operator as a reference, the end close to the instrument operator is the proximal end, and the end away from the instrument operator is the distal end; the axial direction in the present invention refers to the length direction of the component, and the transverse direction refers to the direction perpendicular to the axial direction. In addition, the terms first, second, etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0047] Please refer to Figures 1 to 10 As shown, a medical stapler 100 in a first embodiment of the present invention is used to apply a plurality of staples to physiological tissues of a human body and cut corresponding physiological tissues at the same time.

[0048] The medical stapler 100 of the present invention is a circular tube stapler, and a circumcision stapler used for circumcision surgery is used to apply multiple staples to the physiological tissue of the human body (here, foreskin) and cut the corresponding physiological tissue at the same time. However, it should be noted that the technical spirit involved in the following embodiments can be replaced and applied to other forms of staplers, such as a circular tube stapler with double handles.

[0049] The circumcision stapler 100 comprises a stapler body 1 , an anvil assembly 2 axially movably connected to the stapler body 1 , and a safety mechanism 3 movably disposed in the stapler body 1 .

[0050] The stapler body 1 includes a shell 11, a firing mechanism arranged on the shell 11, a stapler assembly 14 arranged at the distal end of the shell 11, and a knob 15 arranged at the proximal end of the shell 11 to drive the anvil assembly 2 to move axially along the stapler body 1.

[0051] Preferably, the housing 11 is formed by splicing two sub-housings.

[0052] The firing mechanism includes a nail pushing rod 12 movably disposed in the shell 11 and a firing handle 13 pivotally connected to the shell 11. The nail pushing rod 12 can move axially along the stapler body 1 to act on the staple magazine assembly 14 to achieve the firing of the staples and / or cutter.

[0053] In the present embodiment, two firing handles 13 are symmetrically disposed on opposite sides of the housing 11 , but the present invention is not limited thereto, and only one firing handle 13 may also be disposed.

[0054] Please refer to Figure 3 As shown, the nail magazine assembly 14 includes a nail barrel 141 disposed at the distal end of the housing 11, a nail pushing piece 142 disposed in the nail barrel 141, a cutter disposed on the nail pushing piece 142, and a nail magazine 143 disposed at the distal end of the nail barrel 141. The structures of the various components in the nail magazine assembly 14 and the coordination relationship between them are all existing in the art, and are not described in detail here.

[0055] The proximal end of the nail pushing piece 142 is connected to the distal end of the nail pushing rod 12 , so that the nail pushing rod 12 can drive the nail pushing piece 142 to move synchronously.

[0056] Furthermore, the anvil assembly 2 includes an anvil 21 that cooperates with the stapler assembly 14, and an anvil shaft 22 connected to the proximal end of the anvil 21, the anvil shaft 22 is inserted into the stapler body 1, and the proximal end of the anvil shaft 22 is threadedly connected to the knob 15. By rotating the knob 15, the anvil assembly 2 is driven to move axially along the stapler body 1 so that the anvil 21 moves toward or away from the stapler assembly 14. When the anvil assembly 2 is closed in place, the anvil 21 and the stapler 143 clamp the physiological tissue to facilitate subsequent anastomosis cutting and improve the anastomosis effect.

[0057] In a specific embodiment, the anvil shaft 22 includes an anvil shaft body 221 and a screw rod 222 which are arranged in sections, wherein the anvil shaft body 221 is fixedly connected to the anvil seat 21, and the screw rod 222 connects the anvil shaft body 221 and the knob 15. Of course, this is not limited to the above, and the anvil shaft body 221 and the screw rod 222 can also be arranged in one piece.

[0058] It can be understood that in the embodiment where the medical stapler is a circumcision stapler, the distal end of the anvil assembly 2 is further provided with a glans cavity for accommodating the glans.

[0059] The safety mechanism 3 is axially arranged between the anvil assembly 2 and the firing mechanism. The safety mechanism 3 comprises a safety assembly 31 movably arranged in the housing 11 and a transmission member 32 axially arranged between the anvil assembly 2 and the safety assembly 31 .

[0060] The safety component 31 can move between a first position area and a second position area. When the safety component 31 is located in the first position area, the firing mechanism is in a non-firing state. When the safety component 31 is located in the second position area, the firing mechanism is in a firing state.

[0061] During the movement of the anvil assembly 2 in the proximal direction, the anvil assembly 2 acts on the transmission member 32, and drives the safety assembly 31 to move from the first position area to the second position area through the transmission member 32, so that when the anvil assembly 2 is closed in place, the safety assembly 31 moves to the second position area, so that the firing mechanism is in a firing state, which is convenient for subsequent anastomosis cutting. That is, only when the anvil assembly 2 is closed in place, the firing mechanism can perform the firing movement, which can effectively prevent the doctor from holding the firing handle 13 when the anvil assembly 2 is not closed in place, and firing the staples and the cutter, resulting in poor staple formation, and even causing medical accidents.

[0062] The first position area and the second position area are arranged laterally along the stapler body 1. When the anvil assembly 2 moves proximally, the transmission member 32 is driven to move axially proximally, and the safety assembly 31 is driven by the transmission member 32 to move laterally from the first position area to the second position area.

[0063] Furthermore, the safety mechanism 3 also includes a lateral guide structure 4 for guiding the lateral movement of the safety component 31 along the stapler body 1 , thereby enhancing the stability of the movement of the safety component 31 and enhancing the safety effect of the safety component 31 .

[0064] It can be understood that the transverse guide structure 4 is arranged between the safety component 31 and the shell 11, and the transverse guide structure 4 includes a first guide member arranged on the shell, and a second guide member arranged on the safety component 31, and the first guide member cooperates with the second guide member to enable the safety component 31 to move laterally along the anastomosis device body 1.

[0065] In a specific embodiment, two symmetrically arranged transverse guide structures 4 are provided between the safety component 31 and the shell 11 to further enhance the stability of the safety component 31 along the lateral movement. Of course, this is not limited to this, and the transverse guide structure 4 can also be provided on only one side of the safety component 31.

[0066] In a specific embodiment, the first guide member and the second guide member are a slide groove 41 and a slider 42 that cooperate with each other, and the slide groove 41 extends in the transverse direction of the stapler body 1 to connect the safety component 31 to the housing 11 in a lateral sliding manner. Of course, this is not limited to this, and it can be understood that the lateral guide structure 4 only needs to be configured to connect the safety component 31 to the housing 11 in a lateral sliding manner.

[0067] In this embodiment, the slider 42 is disposed on the safety component 31, and the slide groove 41 is disposed on the shell 11. Of course, this is not limited to this. For example, the slider 42 can be protruding from the shell 11. In this case, the slide groove 41 is disposed on the safety component 31.

[0068] Furthermore, the safety mechanism 3 is provided with a marking portion 34, and the shell 11 is provided with an observation port 111 for exposing the marking portion 34 to observe the position of the safety mechanism 3, so that medical personnel can intuitively identify the position of the safety mechanism 3 through the observation port 111, thereby determining whether the anvil assembly 2 is closed in place.

[0069] In this embodiment, the marking portion 34 includes a first marking portion 341 arranged at intervals and a second marking portion 342 different from the first marking portion 341. When the safety mechanism 3 is located in the first position area, the first marking portion 341 is exposed from the observation port 111; when the safety mechanism 3 is located in the second position area, the second marking portion 342 is exposed from the observation port 111. Therefore, medical staff can intuitively identify the position of the safety mechanism 3 through the observation port 111, thereby determining whether the anvil assembly 2 is closed in place.

[0070] In a specific embodiment, the first marking portion 341 is red and the second marking portion 342 is green; of course, it is not limited to this, and the first marking portion 341 and the second marking portion 342 can also be distinguished by other colors or other methods, such as patterns.

[0071] In this embodiment, the marking portion 34 is provided on the safety component 31. In this case, the first marking portion 341 and the second marking portion 342 are provided on the safety component 31 at intervals along the lateral direction. When the safety component 31 moves along the lateral direction, the first marking portion 341 or the second marking portion 342 can be exposed from the observation port 111. Of course, this is not limited to this. For example, the marking portion 34 can also be provided on the transmission member 32. In this case, the first marking portion 341 and the second marking portion 342 are provided on the transmission member 32 at intervals along the axial direction. Therefore, when the transmission member 32 moves along the axial direction, the first marking portion 341 or the second marking portion 342 can be exposed from the observation port 111.

[0072] Furthermore, the safety assembly 31 has a base 311 movably connected to the housing 11, and the base 311 can move laterally along the stapler body 1. The base 311 cooperates with the transmission member 32, and when the anvil assembly 2 moves toward the proximal end, the anvil assembly 2 drives the transmission member 32 to move toward the proximal end, and the transmission member 32 drives the base 311 to move laterally from the first position area to the second position area.

[0073] In a specific embodiment, the marking portion 34 is disposed on the base 311, and the first marking portion 341 and the second marking portion 342 are disposed on the base 311 at intervals along the lateral direction. Of course, this is not limited to the above, and it can be understood that the setting of the marking portion 34 is sufficient as long as the medical staff can intuitively identify the position of the safety mechanism 3 through the observation port 111.

[0074] In this embodiment, the transverse guide structure 4 is disposed between the base 311 and the housing 11 to guide the transverse movement of the base 311 along the stapler body 1, so that the transmission member 32 can drive the safety component 31 to move transversely between the first position area and the second position area. Of course, this is not limited to this, and it can be understood that the transverse guide structure can also be disposed at other parts of the safety component 31, as long as it can guide the safety component 31 to move transversely between the first position area and the second position area.

[0075] In a preferred embodiment, the slider 42 is disposed on the base 311, and the marking portion 34 is disposed on the slider 42. It can be understood that at this time, the first marking portion 341 and the second marking portion 342 are disposed on the slider 42 at intervals along the lateral direction to simplify the structure of the base 311.

[0076] In this embodiment, the firing handle 13 includes a rotating portion 131 pivotally connected to the housing 11, a second connecting portion 132 for driving the nail pushing rod 12, and an operating portion 133 for medical personnel to operate. When the anvil assembly 2 is closed in place, the firing handle 13 is held, and the second connecting portion 132 directly or indirectly abuts against the nail pushing rod 12 to drive the nail pushing rod 12 to move in the distal direction, thereby achieving the firing of the circumcision stapler 100. It is understandable that the linkage between the firing handle 13 and the nail pushing rod 12 is not limited to this.

[0077] In this embodiment, the second connecting portion 132 indirectly abuts against the nail pushing rod 12 , and the nail pushing rod 12 is provided with a first connecting portion 121 . The firing handle 13 and the nail pushing rod 12 have a first state of being uncoupled and a second state of being coupled. It can be understood that, in the embodiment in which the second connecting portion 132 is used to indirectly support and push the nail pushing rod 12 to perform a firing motion, when the above-mentioned firing mechanism is in a non-firing state, that is, the firing handle 13 and the nail pushing rod 12 are in a first state in which they are not linked. At this time, during the process of holding the firing handle 13 and rotating the firing handle 13, the second connecting portion 132 cannot directly or indirectly act on the nail pushing rod 12, so that the nail pushing rod 12 cannot perform a firing motion; accordingly, when the above-mentioned firing mechanism is in a firing state, that is, the firing handle 13 and the nail pushing rod 12 are in a second state in which they can be linked. At this time, during the process of holding the firing handle 13 and rotating the firing handle 13, the second connecting portion 132 will indirectly act on the nail pushing rod 12 to cause the nail pushing rod 12 to perform a firing motion.

[0078] Moreover, in the present embodiment, the first connecting portion 121 is disposed at the proximal end of the nail pushing rod 12. Of course, this is not limited to the above. The first connecting portion 121 can be disposed at any axial position of the nail pushing rod 12. As long as the firing handle 13 and the nail pushing rod 12 are in the second state, the firing handle 3 can be rotated to drive the nail pushing rod 12 to move toward the distal end by acting on the first connecting portion 121.

[0079] In a specific embodiment, there is a clearance space between the firing handle 13 and the nail pushing rod 12, that is, the firing handle 13 and the nail pushing rod 12 are arranged at an axial distance from each other along the stapler body 1. It can be understood that the clearance space is located between the first connecting portion 121 and the second connecting portion 132.

[0080] Please refer to Figure 8 As shown, when the anvil assembly 2 is not closed in place, when the firing handle 13 is held and rotated, the second connecting portion 132 moves in the clearance space and is unable to directly or indirectly resist and act on the nail pushing rod 12, so that the nail pushing rod 12 cannot perform the firing movement. It can be understood that, at this time, the firing handle 13 and the nail pushing rod 12 are in the first state.

[0081] In this embodiment, the safety component 31 is a linkage component capable of switching the firing handle 13 and the nail pushing rod 12 between a first state and a second state. It can be understood that, for the implementation scheme in which the clearance space is set, when the safety component 31 is located in the first position area, the safety component 31 is away from the clearance space, so that the firing handle 13 is in an empty firing state, that is, when the firing handle 13 is rotated, the second connecting portion 132 of the firing handle 13 is always unable to directly or indirectly act on the nail pushing rod 12, thereby failing to fire the stapler. At this time, the firing handle 13 and the nail pushing rod 12 are in the first state; when the safety component 31 is located in the second position area, at least part of the structure of the safety component 31 extends into the clearance space, so that the firing handle 13 can indirectly act on the nail pushing rod 12 through at least part of the structure of the safety component 31. At this time, the firing handle 13 and the nail pushing rod 12 are in the second state, and the nail pushing rod 12 can be driven to move toward the distal direction to fire the stapler by rotating the firing handle 13.

[0082] Further, the first position area and the second position area are arranged along the transverse direction of the stapler body 1, and in this embodiment, the second position area is defined as being closer to the axis of the stapler body 1 than the first position area, that is, the second position area is closer to the stapler push rod 12 than the first position area. Of course, this is not limited to this.

[0083] Specifically, the safety assembly 31 also has a linkage member 312 that cooperates with the base 311. During the movement of the anvil assembly 2 in the proximal direction, the anvil assembly 2 acts on the transmission member 32 to drive the base 311 to move laterally. The base 311 pushes the linkage member 312 to make at least part of the structure of the linkage member 312 extend into the clearance space, so that the firing handle 13 and the nail pushing rod 12 are switched to the second state, that is, the firing handle 13 can indirectly drive the nail pushing rod 12 to perform a firing movement through the linkage member 312, so as to facilitate subsequent firing.

[0084] Ginseng Figure 4-Figure 5 In a specific embodiment shown, the linkage member 312 is movably connected to the base 311, and the linkage member 312 can move along the axial direction of the stapler body 1. When the safety assembly 31 is located in the second position area, at least part of the structure of the linkage member 312 is located in the clearance space to connect the first connection portion 121 and the second connection portion 132. Holding the firing handle 13, the firing handle 13 pushes the linkage member 312 to move in the distal direction, and the linkage member 312 drives the nail pusher rod 12 to move in the distal direction to fire the staples and the cutter. Of course, it is not limited to this. The linkage member 312 can also be movably connected to the nail pusher rod 12. It can be understood that the linkage member 312 only needs to be configured to be able to move between the first position area and the second position area in the transverse direction, and can move synchronously with the nail pusher rod 12 in the distal direction.

[0085] Furthermore, a guide channel 18 is formed between the first connecting portion 121 and the second connecting portion 132, and the guide channel 18 is located in the make way space. When the safety component 31 moves between the first position area and the second position area, the guide channel 18 guides the linkage member 312 to move horizontally along the stapler body 1, and limits the position of the linkage member 312, so that the linkage member 312 is located between the first connecting portion 121 and the second connecting portion 132. Therefore, when the safety component 31 is located in the second position area, the firing handle 13 can act on the nail pushing rod 12 through the linkage member 312, that is, the firing handle 13 and the nail pushing rod 12 are in the second state; when the safety component 31 is located in the second position area, the guide channel 18 accommodates at least part of the linkage member 312, and in the process of rotating the firing handle 13, the guide channel 18 can limit the shaking of the linkage member 312, so that the firing movement is more stable.

[0086] It is understandable that when the safety assembly 31 is located in the first position area, the linkage member 312 is located outside the guide channel 18, so that the first connecting portion 121 and the second connecting portion 132 are spaced apart, and the firing handle 13 and the nail pushing rod 12 are in the first state.

[0087] Ginseng Figure 7 In the specific embodiment shown, the first connecting portion 121 has extension walls 122 located at two opposite sides of the circumferential direction, the extension walls 122 protrude axially toward the second connecting portion 132, and the guide channel 18 is formed between the extension walls 122. Of course, this is not limited thereto.

[0088] It is understandable that in the embodiment with two firing handles 13, the circumcision stapler 100 has two safety mechanisms 3 respectively matched with the firing handles 13, the two safety mechanisms 3 are respectively arranged on opposite sides of the nail pushing rod 12, and the two safety mechanisms 3 are integrally arranged to enhance the effect of the safety mechanisms 3. Of course, this is not limited to this, for example, the specific number of the safety mechanisms 3 is not limited to the above two, and can be set according to specific circumstances; or the two safety mechanisms 3 can be set separately.

[0089] Please refer to Figure 11-15As shown, a second embodiment of the medical stapler of the present invention is shown, and the difference between this embodiment and the first embodiment is that: the second connecting portion 132 directly abuts against the nail pushing rod 12, and when the safety component 31 is located in the first position area, the anvil component 2 is not closed in place, and at this time, the safety component 31 locks the firing mechanism, and at this time, the firing mechanism is in a non-firing state; when the safety component 31 is located in the second position area, the safety component 31 unlocks the firing mechanism, and at this time, the firing mechanism is in a fireable state.

[0090] In this embodiment, the first position area is defined as being closer to the axis of the stapler body 1 than the second position area, that is, the first position area is closer to the stapler pushing rod 12 than the second position area.

[0091] Furthermore, the safety assembly 31 also has a locking portion 314 protruding from the base 311 toward the firing mechanism.

[0092] In the present embodiment, when the safety assembly 31 is located in the first position area, the locking portion 314 locks the nail pushing rod 12 to limit the distal movement of the nail pushing rod 12. It can be understood that at this time, even if the firing handle 13 is held, the firing handle 13 that is supported on the nail pushing rod 12 cannot be rotated because the locking portion 314 limits the distal movement of the nail pushing rod 12.

[0093] Of course, it is not limited thereto. When the safety assembly 31 is located in the first position area, the locking portion 314 can also be configured to lock the firing handle 13 to limit the rotation of the firing handle 13, thereby indirectly preventing the nail push rod 12 from being fired.

[0094] In this embodiment, the nail pushing rod 12 also has a supporting block 123 that cooperates with the locking portion 314. During the closing process of the anvil assembly 2, the safety assembly 31 is located in the first position area, and the locking portion 314 is supported at the distal end of the supporting block 123, locking the nail pushing rod 12 and preventing the firing movement of the nail pushing rod 12.

[0095] Of course, it can be understood that the locking method of the locking portion 314 to lock the nail pushing rod 12 is not limited to this. For example, the locking portion 314 can be set to a groove. When the safety component 31 is located in the first position area, at least part of the structure of the supporting block 123 is accommodated in the locking portion 314 (groove) to lock the nail pushing rod 12; or a limiting groove is directly set on the nail pushing rod 12. When the safety component 31 is located in the first position, at least part of the structure of the locking portion 314 is limited in the limiting groove to lock the nail pushing rod 12.

[0096] In a specific embodiment, the abutment block 123 is provided at the proximal end of the nail pushing rod 12 and extends in the transverse direction, and the locking portion 314 is formed by extending from the base 311 in the proximal direction to cooperate with the abutment block 123. Of course, it is not limited thereto, and the abutment block 123 can also be connected to any other position in the longitudinal direction of the nail pushing rod 12, as long as it can cooperate with the locking portion 314 to lock the nail pushing rod 12 when the anvil assembly 2 is not closed in place.

[0097] When the safety assembly 31 is located in the second position area, the firing mechanism is unlocked, and the nail pusher rod 12 can be fired to fire the stapler and / or the cutter. It can be understood that when the safety assembly 31 is located in the second position area, the locking portion 314 is not on the movement path of the nail pusher rod 12, nor on the rotation path of the firing handle 13, so that the firing handle 13 can be rotated to drive the nail pusher rod 12 to perform the firing movement, thereby completing the firing of the medical stapler 100.

[0098] The second embodiment of the present invention is identical to the first embodiment except for the above differences, and thus will not be described in detail.

[0099] The medical stapler of the present invention will be described in detail below by taking the medical stapler in the first embodiment as an example.

[0100] Furthermore, the transmission member 32 is movably arranged in the stapler body 1. When the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the transmission member 32 to drive the transmission member 32 to move proximally. The transmission member 32 drives the safety assembly 31 to move from the first position area to the second position area, converting the axial movement of the transmission member 32 into the lateral movement of the safety assembly 31. When the anvil assembly 2 is closed in place, at least part of the structure of the linkage member 312 extends into the guide channel 18, so as to achieve The firing handle 13 and the nail pushing rod 12 are linked, so that only when the anvil assembly 2 is closed in place, the firing handle 13 and the nail pushing rod 12 are in the second state, that is, the firing handle 13 and the nail pushing rod 12 are linked. At this time, the circumcision stapler 100 is in a fireable state, which can effectively prevent the doctor from holding the firing handle 13 when the anvil assembly 2 is not closed in place, and firing the staples and the cutter, resulting in poor staple forming and even causing medical accidents.

[0101] The above-mentioned firing state means that the anvil assembly 2 is closed in place, so that the nail magazine assembly 14 and the anvil 21 have clamped the foreskin to be cut in place, and the firing handle 13 and the nail pushing rod 12 are also in the second state that can be linked.

[0102] Specifically, the transmission member 32 is located between the anvil assembly 2 and the base 311. When the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the transmission member 32, and the base 311 is driven to move laterally toward the second position area through the transmission member 32, so as to drive the linkage member 312 to extend into the guide channel 18.

[0103] Furthermore, the anvil assembly 2 also includes a protrusion 23 arranged on the outer periphery of the anvil shaft 22, and the transmission member 32 is arranged at the proximal end of the protrusion 32. When the anvil assembly 2 moves toward the proximal end, the protrusion 23 abuts against the transmission member 32 to drive the transmission member 32 to move toward the proximal end.

[0104] In a specific embodiment, the transmission member 32 is sleeved on the anvil shaft 22, and the protrusion 23 is annular to resist the transmission member 32. However, this is not limited to the embodiment, and the protrusion 23 may not be annular. It is understandable that the protrusion 23 only needs to be able to resist the transmission member 32.

[0105] In the embodiment where the anvil shaft 22 has an anvil shaft body 221 and a screw rod 222 that are arranged in sections, the protrusion 23 can be arranged on the outer periphery of the anvil shaft body 221 or on the outer periphery of the screw rod 222 .

[0106] It can be understood that the outer diameter of the anvil shaft body 221 is generally larger than the outer diameter of the screw rod 222, so that in the embodiment where the protrusion 23 is arranged on the outer periphery of the anvil shaft body 221, the protrusion 23 can be used as a part of the anvil shaft body 221. For example, the protrusion 23 is the proximal end of the anvil shaft body 221. During the movement of the anvil assembly 2 in the proximal direction, the proximal end of the anvil shaft body 221 abuts against the transmission member 32, pushing the transmission member 32 and the anvil assembly 2 to move in the proximal direction synchronously, so as to drive the safety assembly 31 to move from the first position area to the second position area. Of course, this is not limited to the above, and the protrusion 23 can also be arranged at other axial positions of the anvil shaft body 221, as long as the protrusion 23 can drive the transmission member 32 to move in the proximal direction synchronously when the anvil assembly 2 moves in the proximal direction.

[0107] Specifically, the transmission member 32 includes a supporting portion 321 sleeved on the anvil shaft 22 and a transmission rod 322 extending from the supporting portion 321 toward the proximal end, and the supporting portion 321 is in abutment with the protrusion 23. When the anvil assembly 2 moves toward the proximal end, the protrusion 23 abuts against the supporting portion 321, driving the transmission rod 322 to move toward the proximal end, thereby driving the safety assembly 31 to move from the first position area to the second position area.

[0108] Furthermore, the nail magazine assembly 14 is provided with a guide groove 144 which is axially penetrated, and the transmission rod 322 enters the shell 11 from the inner side of the nail magazine assembly 14 through the guide groove 144 and cooperates with the base 311, that is, the proximal end of the transmission rod 322 is abutted and cooperated with the base 311.

[0109] In the present invention, the inner side of the nail magazine assembly 14 refers to the side of the nail magazine assembly 14 close to the axis of the nail magazine assembly 14, more specifically, the side of the nail pushing piece 142 close to its axis. It can be understood that the guide groove 144 penetrates the nail barrel 141 and the nail pushing piece 142 at the same time, so that the transmission rod 322 can pass through the guide groove 144 and pass through the inner side of the nail magazine assembly 14 into the housing 11.

[0110] During the axial movement of the transmission member 32 along the medical stapler 100 , the transmission rod 322 moves along the guide groove 144 to guide and limit the movement of the transmission member 32 .

[0111] Furthermore, an axial guide structure is provided between the transmission member 32 and the stapler body 1 to guide the transmission member 32 to move along the axial direction of the stapler body.

[0112] In this embodiment, the axial guide structure is a through slot 3221 and a guide block 1411 that cooperate with each other. When the transmission member 32 moves axially, the through slot 3221 moves along the guide block 1411 to guide and limit the movement of the transmission member 32.

[0113] In a specific embodiment, the through slot 3221 is provided on the transmission rod 322 and extends in the axial direction, and the guide block 1411 is provided on the nail barrel 141 and is located in the guide slot 144, that is, the guide block 1411 divides the guide slot 144 into two independent guide slots for the transmission rod 322 to pass through. Of course, it is not limited to this, and it can be understood that the guide block 1411 can also be provided on the housing 11, as long as it can cooperate with the through slot 3221 for guidance.

[0114] Furthermore, the abutting portion 321 is detachably connected to the transmission rod 322, so as to facilitate the assembly of the transmission member 32 into the stapler body 1. Of course, it is not limited thereto, and the transmission rod 322 may also be fixedly connected to the abutting portion 321.

[0115] In the embodiment where the circumcision stapler 100 has two safety mechanisms 3, the two transmission members 32 share one abutting portion 321, the abutting portion 321 is sleeved on the anvil shaft 22, and the two transmission rods 322 are connected to opposite ends of the abutting portion 321. When the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the abutting portion 321 to drive the two transmission rods 322 to move in the proximal direction synchronously, and synchronously drive the corresponding safety assembly 31 to move to the second position area. Of course, it is not limited to this, as long as the two transmission members 32 can be driven to move in the proximal direction synchronously through the driving of the anvil assembly 2.

[0116] Furthermore, the safety component 31 is provided with a first guide structure 313, and the transmission member 32 is provided with a second guide structure 323 adapted to the first guide structure 313. When the transmission member 32 moves toward the proximal end, the first guide structure 313 cooperates with the second guide structure 323 to make the safety component 31 move laterally toward the second position area. Of course, it is not limited to this, and the guide structure can also be provided only on the safety component 31 or the transmission member 32, as long as it can guide the relative movement between the transmission member 32 and the safety component 31.

[0117] It can be understood that when the safety component 31 moves laterally toward the first position area, the first guide structure 313 cooperates with the second guide structure 323 to drive the transmission member 32 to move axially toward the distal direction.

[0118] It is understandable that, in this embodiment, the first guide structure 313 is disposed at the distal end of the base 311, and the second guide structure is disposed at the proximal end of the transmission rod 322. Of course, this is not limited thereto.

[0119] Please refer to Figure 5 In the embodiment shown, the first guide structure 313 is a first guide slope, and the second guide structure 323 is a second guide slope, that is, the base 311 and the transmission rod 322 are matched with guide slopes, which has a simple structure and stable matching. Of course, this is not limited to this.

[0120] Specifically, the distances between the first guide slope and the second guide slope and the axis center gradually decrease from the proximal end to the distal end. When the transmission member 32 moves toward the proximal end, it can drive the safety component 31 to move from the first position area to the second position area closer to the axis center.

[0121] It can be understood that in the second embodiment, the distances between the first guide bevel and the second guide bevel and the axis center gradually increase from the proximal end to the distal end, so that when the transmission member 32 moves toward the proximal end, the safety component 31 can be driven to move from the first position area to the second position area farther away from the axis center.

[0122] Furthermore, the nail magazine assembly 14 also includes a limiting cylinder 145 arranged in the nail tube 141. When the anvil assembly 2 moves along the axial direction of the stapler body 1, the anvil assembly 2 moves along the limiting cylinder 145, which can guide the movement of the anvil assembly 2 to prevent the anvil assembly 2 from shaking during the movement.

[0123] The transmission member 32 is located at the proximal end of the limiting cylinder 145. In an embodiment where the anvil shaft 22 has a segmented anvil shaft body 221 and a screw rod 222, during the movement of the anvil assembly 2 in the proximal direction, the proximal end of the anvil shaft body 221 passes through the proximal end of the limiting cylinder 145 and acts on the transmission member 32, pushing the transmission member 32 to move synchronously with the anvil assembly 2 in the proximal direction, so as to drive the safety assembly 31 to move from the first position area to the second position area.

[0124] Furthermore, a first matching portion 223 is provided on the anvil shaft body 221, and a second matching portion 1451 is provided on the limiting cylinder 145. When the anvil assembly 2 is closed in place, the first matching portion 223 cooperates with the second matching portion 1451 to limit the anvil assembly 2 from continuing to move in the proximal direction to prevent the closure from being too tight, which would cause the foreskin tissue to be over-squeezed.

[0125] In this embodiment, the first matching portion 223 is a step portion arranged at the distal end of the anvil shaft body 221, and the second matching portion 1451 is the distal surface of the limiting cylinder 145. When the anvil assembly 2 is closed in place, the proximal surface of the step portion abuts against the distal surface of the limiting cylinder 145 to limit the anvil assembly 2 from continuing to move in the proximal direction to prevent the closure from being too tight, which would cause the foreskin tissue to be excessively squeezed.

[0126] Of course, it is not limited to this. For example, the second matching portion 1451 can also be arranged at the proximal end of the limiting cylinder 145 and protrude toward the center line of the limiting cylinder 145. It can be understood that the first matching portion 223 and the second matching portion 1451 only need to be configured to limit the anvil assembly 2 from continuing to move in the proximal direction when the anvil assembly 2 is closed in place.

[0127] Furthermore, the safety mechanism 3 also includes a reset mechanism 33. When the anvil assembly 2 moves toward the distal direction, the reset mechanism 33 drives the safety assembly 31 to move from the second position area to the first position area, so that the firing handle 13 and the nail pushing rod 12 are switched to the first state to prevent accidental firing.

[0128] In the embodiment where the linkage member 312 is movably connected to the base 311, the reset mechanism 33 is located between the housing and the base 311, so as to drive the base 311 to move laterally toward the first position area, thereby driving the linkage member 312 to move synchronously in the direction away from the guide channel 18. However, it is not limited thereto, and it can be understood that when the linkage member 312 is connected to the nail pushing rod 12, the reset mechanism 33 can also be arranged between the linkage member 312 and the nail pushing rod 12, so that when the base 311 cancels the force applied to the linkage member 312, the reset mechanism 33 can drive the linkage member 312 away from the guide channel 18, so that the firing handle 13 and the nail pushing rod 12 are switched to the first state, thereby preventing accidental firing.

[0129] In this embodiment, the reset mechanism 33 is an elastic member connecting the base 311 and the shell 11, preferably, a tension spring. Of course, this is not limited to this. The reset mechanism 33 can also be a structure such as an elastic block, as long as it can drive the safety component 31 to move from the second position area to the first position area.

[0130] During the movement of the safety component 31 from the first position area to the second position area, the tension spring is gradually stretched, so that when the anvil assembly 2 moves in the distal direction, the transmission member 32 cancels the pressure applied to the safety component 31, and driven by the biasing force of the tension spring, the safety component 31 moves from the second position area to the first position area, and at the same time, the safety component 31 drives the transmission member 32 to move in the distal direction.

[0131] Furthermore, the safety mechanism 3 also includes a limiting structure 35 arranged in the stapler body 1. When the safety component 31 is located in the first position area, the limiting structure 35 is used to limit the distal movement of the transmission member 32 to enhance the stability of the transmission member 32, so that the transmission member 32 can act on the safety component 31 when it moves proximally.

[0132] Specifically, the limiting structure 35 includes a first abutting surface disposed at the distal end of the housing 11 . When the safety assembly 31 is located in the first position area, the transmission rod 322 abuts against the first abutting surface to limit the transmission member 32 from moving toward the distal end.

[0133] In a specific embodiment, a second supporting surface 3222 is provided on the transmission rod 322, which is parallel to and opposite to the first supporting surface. When the safety component 31 is located in the first position area, the second supporting surface 3222 is in contact with the first supporting surface to limit the distal movement of the transmission member 32 and, at the same time, enhance the stability of the transmission member 32.

[0134] Furthermore, the limiting mechanism 35 also includes a receiving portion 351 provided at the proximal end of the nail barrel 145. When the safety component 31 is located in the first position area, at least part of the structure of the abutting portion 321 is received in the receiving portion 351, and the abutting portion 321 abuts against the proximal end of the nail barrel 145, thereby limiting the distal movement of the transmission member 32 and also limiting the rotation of the transmission member 32.

[0135] Furthermore, a first return spring 16 is sleeved on the nail pushing rod 12. When the firing handle 13 and the nail pushing rod 12 are in the second state, the first return spring 16 is gradually compressed during the process of holding the firing handle 13 and driving the nail pushing rod 12 to move toward the distal direction. When the holding force applied to the firing handle 13 is canceled, the nail pushing rod 12 is driven by the biasing force of the first return spring 16 to return to the initial position toward the proximal end.

[0136] Specifically, a convex portion can be provided on the nail pushing rod 12, and the proximal end of the first return spring 16 abuts against the convex portion, and the distal end of the first return spring 16 abuts against the nail tube of the nail magazine assembly 14. Of course, this is not limited to the above. The distal end of the first return spring 16 can also abut against the shell 11, as long as the distal end of the first return spring 16 can be limited.

[0137] Preferably, the convex portion is a part of the first connecting portion 121 to simplify the structure of the nail pushing rod 12. In this case, in the embodiment where the first connecting portion 121 (convex portion) is disposed at the proximal end of the nail pushing rod 12, the nail pushing rod 12 is T-shaped. Of course, this is not limited thereto.

[0138] Furthermore, a second resetting elastic member 17 is provided between the firing handle 13 and the shell 11. When the firing handle 13 is held and rotated, the second resetting elastic member 17 is gradually compressed. When the holding force applied to the firing handle 13 is cancelled, the firing handle 13 is reset to its initial position under the driving force of the biasing force of the second resetting elastic member 17.

[0139] In a specific implementation, the second resetting elastic member 17 is a spring. Of course, the present invention is not limited thereto. The second resetting elastic member 17 may also be an elastic block.

[0140] Compared with the prior art, the medical stapler 100 of the present invention is provided with a safety mechanism 3. Only when the anvil assembly 2 is closed in place, the safety mechanism 3 will put the firing handle 13 and the stapler pusher 12 in the second state in which they can be linked. This can effectively prevent the doctor from firing the staplers and the cutter when the anvil assembly 2 is not closed in place, resulting in poor staple formation and even medical accidents. At the same time, a lateral guide structure 4 is provided to guide the lateral movement of the safety component 31 along the stapler body 1, so as to enhance the stability of the movement of the safety component 31.

[0141] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0142] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A medical stapler, comprising: The stapler body comprises a shell and a firing mechanism arranged on the shell; an anvil assembly, wherein the anvil assembly can move along the axial direction of the stapler body; The medical stapler further comprises: a safety mechanism movably arranged between the anvil assembly and the firing mechanism, the safety mechanism switches the firing mechanism between a non-firing state and a firing state, and the safety mechanism has: A safety assembly, movably disposed in the housing, and having a first position region for placing the firing mechanism in an unfireable state and a second position region for placing the firing mechanism in a fireable state; A transmission member is provided between the anvil assembly and the safety assembly, the transmission member comprises a supporting portion matched with the anvil assembly and a transmission rod extending from the supporting portion toward the proximal end, the safety assembly cooperates with the inclined surface of the transmission rod, and during the movement of the anvil assembly toward the proximal end, the anvil assembly acts on the transmission member, and drives the transmission member to move, thereby driving the safety assembly to move from the first position area to the second position area; A transverse guide structure, the transverse guide structure includes a first guide member arranged on the shell, and a second guide member arranged on the safety component, the first guide member cooperates with the second guide member to guide the safety component to move between a first position area and a second position area along the transverse direction of the anastomosis device body.

2. The medical stapler according to claim 1, characterized in that: The first guide member and the second guide member are a slide groove and a slider that cooperate with each other. The slide groove extends in the transverse direction of the stapler body, and the slider is arranged on the safety component.

3. The medical stapler according to claim 2, characterized in that: The safety mechanism is provided with a marking portion, and the housing is provided with an observation port for exposing the marking portion so as to observe the position of the safety mechanism.

4. The medical stapler according to claim 3, characterized in that: The marking portion includes a first marking portion arranged at intervals and a second marking portion different from the first marking portion. When the safety mechanism is located in a first position area, the first marking portion is exposed from the observation port; when the safety mechanism is located in a second position area, the second marking portion is exposed from the observation port.

5. The medical stapler according to claim 4, characterized in that: The first marking portion is red, and the second marking portion is green.

6. The medical stapler according to any one of claims 3, characterized in that: The marking portion is arranged on the sliding block.

7. The medical stapler according to claim 1, characterized in that: The first position area is closer to the axis of the stapler body than the second position area; the safety component has a base and a locking portion connected to the base to cooperate with the firing mechanism, when the safety component is located in the first position area, the locking portion locks the firing mechanism, and when the safety component is located in the second position area, the locking portion unlocks the firing mechanism.

8. The medical stapler according to claim 1, characterized in that: The firing mechanism includes a nail pushing rod movably arranged in the shell and a firing handle pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the stapler body; the second position area is closer to the axis of the stapler body than the first position area, and when the safety component is located in the first position area, the firing handle and the nail pushing rod cannot be linked to each other, and when the safety component is located in the second position area, the firing handle and the nail pushing rod can be linked to each other.

9. The medical stapler according to claim 8, characterized in that: The nail pushing rod and the firing handle are axially spaced and relatively arranged with a first connecting portion and a second connecting portion, and a guide channel is formed between the first connecting portion and the second connecting portion; when the safety component is located in the first position area, the safety component is not in the guide channel, and when the safety component is located in the second position area, at least part of the structure of the safety component enters the guide channel to connect the nail pushing rod and the firing handle.

10. The medical stapler according to claim 9, characterized in that: The safety component has a base movably connected to the shell, and the transverse guide structure is arranged on the base to guide the base to move transversely along the stapler body.

11. The medical stapler according to claim 10, characterized in that: The safety assembly also has a linkage member that cooperates with the base, and the linkage member can move along the axial direction of the stapler body; during the movement of the anvil assembly in the proximal direction, the anvil assembly acts on the transmission member, and the base is driven to move laterally through the transmission member, and the base pushes the linkage member so that at least part of the structure of the linkage member extends into the guide channel.

12. The medical stapler according to claim 10, characterized in that: The base cooperates with the inclined surface of the transmission rod to drive the base to move toward the second position area.

13. The medical stapler according to claim 1, characterized in that: The safety mechanism further comprises a reset mechanism, and the reset mechanism drives the safety component to move from the second position area to the first position area.

14. The medical stapler according to claim 1, characterized in that: The medical stapler is a circumcision stapler, and the distal end of the anvil assembly is provided with a glans cavity for accommodating the glans.

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