CN111374731A - Medical anastomat - Google Patents

Abstract

The invention provides a medical anastomat, which comprises an anastomat body, a trigger handle and a nail pushing rod, wherein the nail pushing rod is arranged on the anastomat body; an anvil assembly; the safety mechanism in the anastomat body is located in the activity, and safety mechanism makes and switches between the first state that does not link and the second state that can link between percussion handle and the nail pushing rod, and safety mechanism is equipped with: the linkage assembly is provided with a first position area which enables the firing handle and the nail pushing rod to be located in a first state and a second position area which enables the firing handle and the nail pushing rod to be located in a second state; the transmission piece is arranged between the anvil component and the linkage component, and the anvil component acts on the transmission piece in the process that the anvil component moves towards the near end direction and drives the linkage component to move from the first position area to the second position area through the transmission piece; the utility model can effectively prevent the occurrence of medical accidents caused by poor staple formation and even the firing of the staple and the cutter when the anvil component is not closed in place.

Description

Medical anastomat

Technical Field

The invention relates to the field of medical instruments, in particular to a medical anastomat.

Background

The medical anastomat is a medical instrument frequently used for performing surgical suture cutting on physiological tissues such as esophagus, intestinal tract and the like and foreskin and the like, two sections of tissues are converged during anastomosis, an annular anastomosis ring is formed in the tissues, the medical anastomat can enable organism bleeding generated in the surgical process to be discharged along with contents, and the tissues are easy to heal after the surgery.

The existing medical anastomat for treating alimentary canal, redundant prepuce and the like generally comprises an anastomat body, a firing handle rotationally connected with the anastomat body, and an anvil component arranged at the far end of the anastomat body. The anastomat body comprises a shell, a nail bin assembly and a nail pushing rod, wherein the nail bin assembly is arranged at the far end of the shell and matched with the anvil assembly, and the nail pushing rod is arranged in the shell and linked with the firing handle.

When the anvil assembly is closed in place, the medical stapler reaches a cocked state. In the prior art, a general operator judges whether a medical anastomat reaches a cocked state or not according to the sense of the operator, and performs the cocking of an anastomosis nail and a cutter after the medical anastomat reaches the cocked state.

On one hand, however, an operator judges the shape completely according to his own feeling and experience, which easily causes the anvil component to be closed in place so as to cause poor staple forming; on the other hand, some careless or inexperienced doctors may accidentally fire the staples and the knife when the anvil assembly is not closed in place, resulting in poor staple formation and even medical accidents.

In view of the above, there is a need to provide a new medical stapler to solve the above problems.

Disclosure of Invention

The invention aims to provide a medical anastomat.

In order to achieve the purpose, the invention adopts the following technical scheme: a medical stapler, comprising:

the anastomat body comprises a shell, a nail pushing rod and a firing handle, wherein the nail pushing rod is movably arranged in the shell, the firing handle is pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the anastomat body;

an anvil assembly movable in an axial direction of the stapler body;

the activity is located the safety mechanism in the anastomat body, safety mechanism makes the percussion handle with switch between the second state that can link between the first state of non-linkage and the push pin pole, just safety mechanism is equipped with:

the linkage assembly is movably arranged in the shell and is provided with a first position area which enables the firing handle and the nail pushing rod to be located in a first state and a second position area which enables the firing handle and the nail pushing rod to be located in a second state;

the transmission piece is arranged between the anvil component and the linkage component, and in the process that the anvil component moves towards the near end direction, the anvil component acts on the transmission piece and drives the linkage component to move from the first position area to the second position area through the transmission piece.

As a further improved technical scheme of the invention, an abdicating space is arranged between the firing handle and the nail pushing rod; when the linkage assembly is located the second position region, at least part of the structure of the linkage assembly stretches into the abdicating space, so that the firing handle can act on the nail pushing rod through the linkage assembly.

As a further improved technical solution of the present invention, the first position region and the second position region are arranged along a transverse direction of the stapler body; the linkage assembly is provided with an edge, the linkage assembly is movably connected to the base in the shell and a linkage piece matched with the base, the anvil assembly acts on the transmission piece in the process of moving towards the near end direction, the base drives the base to move along the transverse direction through the transmission piece, and the base pushes the linkage piece to enable at least part of structure of the linkage piece to stretch into the abdicating space.

As a further improved technical scheme, the linkage piece is movably connected to the base and can move along the axial direction of the anastomat body.

As a further improved technical solution of the present invention, a guiding structure for guiding the base to move along the lateral direction of the stapler body is disposed between the base and the housing.

As a further improved technical scheme of the invention, the guide mechanism is a sliding groove and a sliding block which are matched with each other.

As a further improvement of the present invention, the anvil assembly includes an anvil, an anvil shaft connected to a proximal end of the anvil, and a protrusion disposed on an outer periphery of the anvil shaft, wherein the protrusion acts on the transmission member to move the transmission member proximally.

As a further improved technical scheme of the invention, the transmission member comprises a butting part sleeved on the anvil shaft and a transmission rod extending from the butting part to the near end, and the base is arranged at the near end of the transmission rod; the convex block acts on the abutting part to drive the transmission rod to move towards the near end, and the linkage assembly is driven to move from the first position area to the second position area.

As a further improved technical scheme of the invention, the anastomat body further comprises a nail bin assembly arranged at the far end of the shell, and a guide groove penetrating along the axial direction is formed in the nail bin assembly; the transmission rod is movably arranged in the guide groove.

As a further improved technical solution of the present invention, a distal end of the base is provided with a first guide structure, a proximal end of the transmission rod is provided with a second guide structure adapted to the first guide structure, and the first guide structure and the second guide structure are matched to enable the transmission rod to drive the base to move in a lateral direction.

As a further improved technical scheme of the present invention, the first guiding structure is a first guiding inclined plane, and a distance from the first guiding inclined plane to the axis is gradually reduced from a proximal end to a distal end; the second guide structure is a second guide inclined plane, and the distance from the second guide inclined plane to the axis is gradually reduced from the near end to the far end.

As a further improved technical solution of the present invention, the safety mechanism further includes a reset mechanism, and the reset mechanism is configured to drive the linkage assembly to move from the second position region to the first position region.

As a further improved technical solution of the present invention, the first position region and the second position region are arranged along a transverse direction of the stapler body; the linkage assembly is provided with a base which is transversely movably connected in the shell and a linkage piece which is axially movably arranged on the base, and the resetting mechanism is connected with the base and the shell.

As a further improved technical scheme of the invention, the reset mechanism is an elastic piece which connects the linkage assembly and the shell.

As a further improved technical scheme of the invention, the medical anastomat is a circumcision anastomat, and the far end of the anvil component is provided with a glans penis cavity for accommodating glans penis.

The invention has the beneficial effects that: according to the medical anastomat, the safety mechanism is arranged, so that the triggering handle and the nail pushing rod can be in the second linkage state only when the anvil component is closed in place, and the situation that a doctor triggers the anastomosis nails and the cutter under the condition that the anvil component is not closed in place, so that poor formation of the anastomosis nails and even medical accidents are caused can be effectively prevented.

Drawings

Fig. 1 is a schematic structural view of a medical stapler according to the present invention.

Fig. 2 is a schematic view of another angle of the medical stapler shown in fig. 1.

Fig. 3 is a cross-sectional view a-a of the medical stapler of fig. 2 without the anvil assembly closed in place.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is a schematic view of the safety mechanism of fig. 4.

Fig. 6 is a schematic structural view of the medical stapler shown in fig. 1 with a housing removed.

Fig. 7 is a schematic structural view of a staple pushing bar in the medical stapler shown in fig. 1.

Fig. 8 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed in place and the handle is grasped.

Fig. 9 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed into position.

Fig. 10 is a cross-sectional view a-a of the medical stapler of fig. 2 after the anvil assembly is closed in place and the handle is grasped.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings, and reference is made to fig. 1 to 10, which are preferred embodiments of the present invention. It should be noted that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make functional, methodical, or structural equivalents or substitutions according to these embodiments without departing from the scope of the present invention.

The words expressing the position and the direction described in the invention all take an instrument operator as reference, one end close to the instrument operator is a near end, and the other end far away from the instrument operator is a far end; in the present invention, the axial direction means the longitudinal direction of the member, and the lateral direction means the direction perpendicular to the axial direction. Moreover, the terms first, second, etc. in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any number of technical features indicated.

Referring to fig. 1 to 10, the present invention provides a medical stapler 100, wherein the medical stapler 100 is used for applying a plurality of staples to a physiological tissue of a human body and cutting the corresponding physiological tissue.

The medical stapler 100 according to the embodiment of the present invention is a circular tube type stapler, and is specifically described by taking a circumcision stapler for performing a circumcision as an example, so as to apply a plurality of staples to a physiological tissue (herein, foreskin) of a human body and simultaneously cut the corresponding physiological tissue. It should be noted that the technical spirit involved in the embodiments described below can be alternatively applied to other types of staplers, such as a circular tube-type stapler having a double handle.

The circumcision anastomat 100 comprises an anastomat body 1, an anvil component 2 which is axially movably connected to the anastomat body 1, and a safety mechanism 3 which is movably arranged in the anastomat body 1.

The stapler body 1 comprises a shell 11, a staple pushing rod 12 movably arranged in the shell 11, a firing handle 13 pivotally connected to the shell 11, a staple cartridge 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 along the stapler body 1 in the axial direction, wherein the staple pushing rod 12 can move along the stapler body 1 in the axial direction.

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

In this embodiment, the firing handle 13 includes a rotating portion 131 pivotally connected to the housing 11, a second engaging portion 132 for driving the staple pushing bar 12, and an operating portion 133 for operating by the medical staff. When the firing handle 13 rotates, the second engaging portion 132 directly or indirectly abuts against and acts on the staple pushing rod 12 to drive the staple pushing rod 12 to move towards the distal direction, so as to achieve the firing of the circumcision anastomat 100. It will be appreciated that the linkage between the firing handle 13 and the staple pusher bar 12 is not so limited.

Further, the firing handle 13 and the staple pushing rod 12 have an un-linked first state and a linked second state. It can be understood that, in the embodiment in which the second engaging portion 132 pushes the staple pushing bar 12 to perform the firing motion, the first state of the linkage between the firing handle 13 and the staple pushing bar 12 means that the second engaging portion 132 cannot directly or indirectly act on the staple pushing bar 12 all the time during the process of holding the firing handle 13 to rotate the firing handle 13, so that the staple pushing bar 12 cannot perform the firing motion; correspondingly, the above-mentioned second linkage state refers to that the firing handle 13 is held, and during the rotation of the firing handle 13, the second engagement portion 132 directly or indirectly acts on the staple pushing bar 12 to cause the staple pushing bar 12 to perform a firing motion.

In a specific embodiment, the first engaging portion 121 is disposed on the nail pushing rod 12, and an abdicating space is disposed between the trigger handle 13 and the nail pushing rod 12, that is, the trigger handle 13 and the nail pushing rod 12 are disposed along the axial direction of the stapler body 1 at an interval, it can be understood that the abdicating space is disposed between the first engaging portion 121 and the second engaging portion 132.

Referring to fig. 8, when the anvil assembly 2 is not closed in place, the firing handle 13 is held, and when the firing handle 13 rotates, the second engaging portion 132 moves in the abdicating space and cannot directly or indirectly abut against and act on the staple pushing rod 12, so that the staple pushing rod 12 cannot perform a firing motion, and it can be understood that, at this time, the firing handle 13 and the staple pushing rod 12 are in the first state.

In addition, in the present embodiment, the first engaging portion 121 is disposed at the proximal end of the nail pushing bar 12, but not limited thereto, the first engaging portion 121 may be disposed at any axial position of the nail pushing bar 12, and as long as the firing handle 3 is rotated when the firing handle 13 and the nail pushing bar 12 are in the second state, the first engaging portion 121 may actuate the nail pushing bar 12 to move towards the distal end.

Further, a first return spring 16 is sleeved on the nail pushing rod 12, and when the firing handle 13 and the nail pushing rod 12 are in a second state, the firing handle 13 is held to drive the nail pushing rod 12 to move towards the far end direction, the first return spring 16 is gradually compressed. When the holding force applied to the firing handle 13 is removed, the staple pushing bar 12 is reset to the initial position in the proximal direction under the driving of the biasing force of the first return spring 16.

Specifically, a convex portion may be disposed on the nail pushing rod 12, 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 barrel of the nail cartridge assembly 14, but not limited thereto, the distal end of the first return spring 16 may also abut against the housing 11, as long as the distal end of the first return spring 16 can be limited.

Preferably, the projection is a part of the first engagement portion 121 to simplify the structure of the nail pushing bar 12, and in this case, in an embodiment in which the first engagement portion 121 (projection) is provided at the proximal end of the nail pushing bar 12, the nail pushing bar 12 is T-shaped in a direction from the proximal end to the distal end. Of course, this is not a limitation.

Further, a second elastic return element 17 is disposed between the firing handle 13 and the housing 11, and when the firing handle 13 is held and the firing handle 13 is rotated, the second elastic return element 17 is gradually compressed, and when the holding force applied to the firing handle 13 is cancelled, the firing handle 13 is returned to the initial position under the biasing force of the second elastic return element 17.

In an embodiment, the second elastic return element 17 is a spring, but the second elastic return element 17 may also be an elastic block.

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

Referring to fig. 3, the nail magazine assembly 14 includes a nail barrel 141 disposed at a distal end of the housing 11, a nail pushing plate 142 disposed in the nail barrel 141, a cutter disposed on the nail pushing plate 142, and a nail magazine 143 disposed at a distal end of the nail barrel 141. The structures of the components in the staple cartridge assembly 14 and the matching relationship between the components are all existing in the field, and are not described herein again.

The proximal end of the nail pushing sheet 142 is connected with the distal end of the nail pushing rod 12, so that the nail pushing rod 12 can drive the nail pushing sheet 142 to move synchronously.

The anvil assembly 2 comprises an anvil 21 matched with the staple cartridge assembly 14 and an anvil shaft 22 connected to a proximal end of the anvil 21, the anvil shaft 22 is inserted into the stapler body 1, and a proximal end of the anvil shaft 22 is threadedly connected to the knob 15, and by rotating the knob 15, the anvil assembly 2 is driven to move along an axial direction of the stapler body 1, so that the anvil 21 moves towards or away from the staple cartridge assembly 14, and when the anvil assembly 2 is closed in place, the anvil 21 and the staple cartridge 143 clamp tissue, thereby facilitating subsequent anastomotic cutting and improving anastomosis effect.

In one embodiment, the anvil shaft 22 includes an anvil shaft body 221 and a lead screw 222, the anvil shaft body 221 is fixedly connected to the anvil 21, and the lead screw 222 connects the anvil shaft body 221 and the knob 15. Of course, the anvil shaft body 221 and the lead screw 222 may be integrally provided.

It will be appreciated that in embodiments where the medical stapler is a circumcision stapler, the distal end of the anvil assembly 2 is also provided with a glans cavity for receiving the glans.

Referring to fig. 3 to 10, the safety mechanism 3 is movably disposed in the stapler body 1, and the safety mechanism 3 can switch the firing handle 13 and the staple pushing bar 12 between the first state and the second state.

Further, referring to fig. 4-5, the safety mechanism 3 includes a linkage assembly 31 movably disposed in the housing 11, and a transmission member 32 axially disposed between the anvil assembly 2 and the linkage assembly 31, wherein during the proximal movement of the anvil assembly 2, the anvil assembly 2 acts on the transmission member 32, and the transmission member 32 drives the linkage assembly 31 to move.

The linkage assembly 31 is movable between a first position region in which the firing handle 13 and the staple pusher bar 12 are in a first state and a second position region in which the firing handle and the staple pusher bar 12 are in a second state. It is understood that, in the embodiment of providing the abdicating space, when the linkage assembly 31 is located at the first position region, the linkage assembly 31 is far away from the abdicating space, so that the firing handle 13 is in the idle firing state, that is, when the firing handle 13 is rotated, the second engagement portion 132 of the firing handle 13 cannot directly or indirectly act on the staple pushing rod 12 at all times, so that the stapler cannot be fired, and at this time, the firing handle 13 and the staple pushing rod 12 are in the first state; linkage subassembly 31 is located the second position when regional, linkage subassembly 31 at least partial structure stretches into in the space of stepping down, make firing handle 13 can pass through linkage subassembly 31 can indirectly act on push away the nail pole 12, this moment firing handle 13 with push away the nail pole 12 and be in the second state, through rotating firing handle 13 can drive push away the nail pole 12 towards distal end direction motion with the firing anastomat.

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 to be closer to the axial center of the stapler body 1 relative to the first position area, that is, the second position area is closer to the staple pushing rod 12 relative to the first position area. Of course, this is not a limitation.

Specifically, linkage assembly 31 have swing joint in base 311 in the casing 11, with base 311 matched with linkage 312, lateral motion can be followed to base 311 in the process of anvil subassembly 2 to the proximal direction motion, anvil subassembly 2 acts on driving medium 32, drive base 311 is along lateral motion, base 311 promotes linkage 312 makes at least part structure of linkage 312 stretches into in the space of stepping down, so that firing handle 13 with push away the nail pole 12 and switch to the second state, subsequent firing of being convenient for.

In the embodiment shown in fig. 4 to 5, the link 312 is movably connected to the base 311, and the link 312 can move along the axial direction of the stapler body 1, when the linkage assembly 31 is located at the second position region, at least a part of the structure of the link 312 extends into the abdicating space to engage with the first engagement portion 121 and the second engagement portion 132. The firing handle 13 is held, the firing handle 13 pushes the linkage piece 312 to move towards the far end direction, and the linkage piece 312 drives the staple pushing rod 12 to move towards the far end direction, so as to fire the staples and the cutter.

Of course, the linkage 312 is not limited to this, and the linkage 312 may also be movably connected to the nail pushing rod 12, and it should be understood that the linkage 312 only needs to be configured to move between the first position area and the second position area along the transverse direction and move in the distal direction synchronously with the nail pushing rod 12.

Further, the stapler body 1 further has a guide channel 18 disposed between the first joining portion 121 and the second joining portion 132, the guide channel 18 is located in the abdicating space, when the linkage assembly 31 moves between the first position area and the second position area, the guide channel 18 guides the transverse movement of the linkage member 312 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 joining portion 121 and the second joining portion 132, and thus, when the linkage assembly 31 is located in the second position area, the firing handle 13 and the staple pushing rod 12 are in the second state; when the linkage assembly 31 is located in the second position region, the guide channel 18 accommodates at least a portion of the linkage member 312, and during the rotation of the firing handle 13, the guide channel 18 can limit the linkage member 312 from shaking, so that the firing movement is more stable.

It will be appreciated that when the linkage assembly 31 is in the first position region, the linkage 312 is outside the guide channel 18 such that the first and second links 121, 132 are spaced apart and the firing handle 13 and the staple pusher bar 12 are in the first configuration.

In the embodiment shown in fig. 7, the first engaging portion 121 has extending walls 122 at opposite sides in the axial direction, the extending walls 122 project toward the second engaging portion 132 in the circumferential direction, and the guide passage 18 is formed between the extending walls 122. Of course, this is not a limitation.

Further, a transverse guiding structure 4 is disposed between the base 311 and the housing 11 to guide the base 311 to move along the stapler body 1, so that the transmission member 32 can drive the linkage assembly 31 to move along the transverse direction between the first position area and the second position area.

Further, the two lateral guide mechanisms 4 symmetrically disposed with respect to each other are disposed between the base 311 and the housing 11, so as to further enhance the stability of the base 311 in the lateral movement, but the present invention is not limited thereto, and the lateral guide mechanisms 4 may be disposed only on one side of the base 311.

In this embodiment, the transverse guiding structure 4 is a sliding slot 41 and a sliding block 42, which are engaged with each other, and the sliding slot 41 extends along the transverse direction of the stapler body 1 to slidably connect the base 311 to the housing 11 along the transverse direction. Of course, it is not limited thereto, and it should be understood that the transverse guiding structure 4 is only required to be configured to connect the base 311 to the housing 11 in a transverse sliding manner.

In one embodiment, the sliding block 42 is disposed on the base 311, and the sliding groove 41 is disposed on the housing 11. Of course, the present invention is not limited to this, and for example, the slider 42 may be provided on the housing 11, and in this case, the slide groove 41 may be provided on the base 311.

It can be understood that in the embodiment having two triggering handles 13, the circumcision stapler 100 has two safety mechanisms 3 respectively cooperating with the triggering handles 13, two safety mechanisms 3 are respectively disposed at two opposite sides of the staple pushing bar 12, and two safety mechanisms 3 are integrally disposed to enhance the effect of the safety mechanisms 3. Of course, the number of the safety mechanisms 3 is not limited to two, and may be set according to the specific situation; or two of the safety mechanisms 3 may be separately provided.

The transmission member 32 is movably disposed in the stapler body 1, when the anvil assembly 2 moves towards the proximal end direction, the anvil assembly 2 acts on the transmission member 32 to drive the transmission member 32 to move towards the proximal end, the transmission member 32 drives the linkage assembly 31 to move from the first position area to the second position area, the axial movement of the transmission member 32 is converted into the transverse movement of the linkage assembly 31, and when the anvil assembly 2 is closed to the proper position, at least a part of the structure of the linkage member 312 extends into the guide channel 18 to realize the linkage between the firing handle 13 and the staple pushing rod 12, so that only when the anvil assembly 2 is closed to the proper position, the firing handle 13 and the staple pushing rod 12 are in the second state, that is, the firing handle 13 and the staple pushing rod 12 can be linked, at this time, the circumcision stapler 100 is in the cocked state, the situation that a doctor holds the firing handle 13 under the condition that the anvil component 2 is not closed in place to fire the anastomosis nail and the cutter can be effectively prevented, so that poor formation of the anastomosis nail and even medical accidents are caused.

The above-mentioned cocked state is the state that the anvil assembly 2 is closed in place, so that the staple cartridge assembly 14 and the anvil 21 clamp the foreskin to be cut in place, and the firing handle 13 and the staple pushing bar 12 are in the second state of linkage.

Specifically, the transmission member 32 is located between the anvil assembly 2 and the base 311 in the axial direction, and when the anvil assembly 2 moves in the proximal direction, the anvil assembly 2 acts on the transmission member 32 to drive the base 311 to move in the transverse direction to the second position region through the transmission member 32, so as to drive the linkage member 312 to extend into the guide channel 18.

Further, the anvil assembly 2 further includes a protrusion 23 disposed on the outer periphery of the anvil shaft 22, the transmission member 32 is disposed at a proximal end of the protrusion 23, and when the anvil assembly 2 moves proximally, the protrusion 23 abuts against the transmission member 32 to drive the transmission member 32 to move proximally.

In one embodiment, the transmission member 32 is sleeved on the anvil shaft 22, and the protrusion 23 is annular to act on the transmission member 32. However, the present invention is not limited to this, and the projection 23 may not be provided in a ring shape, and it is understood that the projection 23 may be provided so as to be capable of acting against the transmission member 32.

In the embodiment where the anvil 22 has the anvil body 221 and the lead screw 222 arranged in segments, the projection 23 may be provided on the outer periphery of the anvil body 221 or the outer periphery of the lead screw 222.

It will be appreciated that the outer diameter of the anvil shaft body 221 is generally larger than the outer diameter of the lead screw 222, so that, in the embodiment where the protrusion 23 is disposed on the outer periphery of the anvil shaft body 221, the protrusion 23 may be a part of the anvil shaft body 221, for example, the protrusion 23 is a proximal end of the anvil shaft body 221, and during the proximal movement of the anvil assembly 2, the proximal end of the anvil shaft body 221 abuts against the transmission member 32, pushing the transmission member 32 to move in the proximal direction synchronously with the anvil assembly 2, so as to drive the linkage assembly 31 to move from the first position region to the second position region. Of course, the cam 23 may be disposed at other axial positions of the anvil shaft body 221, as long as the cam 23 can drive the transmission member 32 to move in the proximal direction when the anvil assembly 2 moves in the proximal direction.

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 to the proximal end, the supporting portion 321 is supported and matched with the protrusion 23, when the anvil assembly 2 moves to the proximal end, the protrusion 23 is supported and acted on the supporting portion 321 to drive the transmission rod 322 to move to the proximal end, and the linkage assembly 31 is driven to move from the first position area to the second position area.

Further, a guide groove 144 is axially arranged on the magazine assembly 14 in a penetrating manner, and the transmission rod 322 enters the housing 11 from the inner side of the magazine assembly 14 through the guide groove 144 and is matched with the base 311, that is, the proximal end of the transmission rod 322 abuts against and is matched with the base 311.

In the present invention, the inner side of the staple cartridge assembly 14 refers to a side of the staple cartridge assembly 14 close to the axial center of the staple cartridge assembly 14, and more specifically, refers to a side of the staple pushing plate 142 close to the axial center thereof. It is understood that the guide slot 144 extends through both the staple cartridge 141 and the staple pusher 142, so that the transmission rod 322 can pass through the guide slot 144 and out of the inside of the cartridge module 14 into the housing 11.

During the axial movement of the transmission member 32 along the medical stapler 100, the transmission rod 322 moves along the guide groove 144, and guides and limits the movement of the transmission member 32.

Further, an axial guiding structure is further disposed between the transmission member 32 and the stapler body 1 to guide the transmission member 32 to move along the stapler body in the axial direction.

In this embodiment, the axial guiding structure is a through groove 3221 and a guiding block 1411, which are matched with each other, and when the transmission member 32 moves along the axial direction, the through groove 3221 moves along the guiding block 1411 to guide and limit the movement of the transmission member 32.

In one embodiment, the through groove 3221 is disposed on the transmission rod 322 and extends along the axial direction, and the guiding block 1411 is disposed on the nail barrel 141 and located in the guiding groove 144, that is, the guiding block 1411 separates the guiding groove 144 into two independent guiding grooves for the transmission rod 322 to pass through. Of course, the invention is not limited thereto, and it should be understood that the guiding block 1411 may be disposed on the housing 11 as long as it can be guided and matched with the through groove 3221.

Further, the abutting portion 321 is detachably connected to the transmission rod 322, so as to assemble the transmission member 32 into the stapler body 1. Of course, the driving rod 322 is not limited to this, and may be fixedly connected to the abutting portion 321.

In the embodiment that the circumcision anastomat 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 two opposite ends of the abutting portion 321, when the anvil assembly 2 moves towards the proximal direction, the anvil assembly 2 acts on the abutting portion 321 to drive the two transmission rods 322 to move towards the proximal direction synchronously, and the corresponding linkage assembly 31 is driven to move towards the second position area synchronously. Of course, the present invention is not limited thereto, as long as the driving of the anvil assembly 2 can drive the two transmission members 32 to move synchronously in the proximal direction.

Further, a first guiding structure 313 is disposed on the linkage assembly 31, a second guiding structure 323 corresponding to the first guiding structure 313 is disposed on the transmission member 32, and when the transmission member 32 moves proximally, the first guiding structure 313 and the second guiding structure 323 cooperate to move the linkage assembly 31 laterally to the second position area. Of course, the present invention is not limited to this, and a guide structure may be provided only on the linkage assembly 31 or the transmission member 32, as long as the relative movement between the transmission member 32 and the linkage assembly 31 can be guided.

It will be appreciated that when the linkage assembly 31 is moved laterally to the first position, the first guide structure 313 and the second guide structure 323 cooperate to drive the transmission member 32 in an axial distal direction.

It is understood that in this embodiment, the first guiding structure 313 is disposed at the distal end of the base 311, and the second guiding structure is disposed at the proximal end of the transmission rod 322. Of course, this is not a limitation.

Referring to the embodiment shown in fig. 5, the first guiding structure 313 is a first guiding inclined surface, and the second guiding structure 323 is a second guiding inclined surface, that is, the base 311 and the transmission rod 322 are matched by using the guiding inclined surfaces, so that the structure is simple and the matching is stable. Of course, this is not a limitation.

Specifically, the distances from the first guiding inclined surface to the axis of the linkage assembly 31 and the distances from the second guiding inclined surface to the axis of the linkage assembly are gradually decreased from the proximal end to the distal end, and when the transmission member 32 moves towards the proximal end, the linkage assembly 31 can be driven to move from the first position area to the second position area closer to the axis of the linkage assembly.

Further, the staple cartridge assembly 14 further comprises a limiting cylinder 145 arranged in the staple cylinder 141, and 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, so that the movement of the anvil assembly 2 can be guided, and the anvil assembly 2 is prevented from shaking in the moving process.

In the embodiment where the anvil 22 has the anvil body 221 and the lead screw 222 arranged in segments, the proximal end of the anvil body 221 penetrates through the proximal end of the limiting cylinder 145 and acts on the transmission member 32 to push the transmission member 32 and the anvil 2 to move in the proximal direction synchronously, so as to drive the linkage assembly 31 to move from the first position region to the second position region.

Further, the anvil shaft body 221 is provided with a first matching portion 223, the limiting cylinder 145 is provided with a second matching portion 1451, and when the anvil assembly 2 is closed in place, the first matching portion 223 matches with the second matching portion 1451 to limit the anvil assembly 2 to continue moving towards the proximal direction, so as to prevent over-tight closing and prevent the foreskin tissue from being excessively squeezed.

In this embodiment, the first matching portion 223 is a step portion disposed at the distal end of the anvil shaft body 221, and the second matching portion 1451 is a distal end surface of the limiting cylinder 145, when the anvil assembly 2 is closed in place, a proximal end surface of the step portion abuts against the distal end surface of the limiting cylinder 145 to limit the anvil assembly 2 to continue moving in the proximal direction, so as to prevent over-tightening of the closure, and prevent the foreskin tissue from being excessively squeezed.

Of course, the present invention is not limited to this, for example, the second matching part 1451 may also be disposed at the proximal end of the limiting cylinder 145 and formed to protrude toward the center line of the limiting cylinder 145; it will be appreciated that the first mating portion 223 and the second mating portion 1451 are configured to limit the anvil assembly 2 from continuing to move in the proximal direction when the anvil assembly 2 is closed in place.

Further, the safety mechanism 3 further includes a reset mechanism 33, and in the process that the anvil assembly 2 moves towards the distal end direction, the reset mechanism 33 drives the linkage assembly 31 to move from the second position region to the first position region, so that the firing handle 13 and the staple pushing rod 12 are switched to the first state, and the accidental firing is prevented.

In the embodiment that 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 along the transverse direction to the first position region, and drive the linkage member 312 to move synchronously in the direction away from the guide channel 18. However, it should be understood that, when the linkage 312 is connected to the staple pushing bar 12, the reset mechanism 33 may be disposed between the linkage 312 and the staple pushing bar 12, so that when the base 311 removes the force applied to the linkage 312, the reset mechanism 33 can drive the linkage 312 away from the guide channel 18 to switch the firing handle 13 and the staple pushing bar 12 to the first state, thereby preventing the accidental firing.

In the present embodiment, the reset mechanism 33 is an elastic member, preferably a tension spring, connecting the base 311 and the housing 11, but not limited thereto, and the reset mechanism 33 may be an elastic block or the like as long as it can drive the linkage assembly 31 to move from the second position region to the first position region.

In the process of moving the linkage assembly 31 from the first position region to the second position region, 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 linkage assembly 31, and the linkage assembly 31 moves from the second position region to the first position region under the driving of the biasing force of the tension spring, and at the same time, the linkage assembly 31 drives the transmission member 32 to move in the distal direction.

Further, the safety mechanism 3 further includes a limiting structure 35 disposed in the stapler body 1, and when the linkage assembly 31 is located in the first position region, the limiting structure 35 is configured to limit the transmission member 32 to move distally, so as to enhance the stability of the transmission member 32, and when the transmission member 32 moves proximally, the limiting structure can act on the linkage assembly 31.

Specifically, the limiting structure 35 includes a first abutting surface disposed at the far end of the housing 11, and when the linkage assembly 31 is located in the first position region, the transmission rod 322 abuts against the first abutting surface to limit the transmission member 32 from moving to the far end.

In a specific embodiment, the transmission rod 322 is provided with a second abutting surface 3222 parallel to and opposite to the first abutting surface, when the linkage assembly 31 is located at the first position region, the second abutting surface 3222 abuts against and fits the first abutting surface, so as to limit the distal movement of the transmission member 32, and meanwhile, enhance the stability of the transmission member 32.

Further, the limiting mechanism 35 further includes an accommodating portion 351 disposed at a proximal end of the nail barrel 145, when the linkage assembly 31 is located in the first position region, at least a part of the structure of the abutting portion 321 is accommodated in the accommodating portion 351, and the abutting portion 321 abuts against the proximal end of the nail barrel 145, so as to limit the distal movement of the transmission member 32 and also limit the rotation of the transmission member 32.

Furthermore, a mark part 34 is arranged on the safety mechanism 3, and an observation port 111 through which the mark part 35 is exposed to observe the position of the safety mechanism 3 is arranged on the housing 11, so that medical staff can intuitively distinguish the position of the safety mechanism 3 through the observation port 111, and thus judge whether the anvil assembly 2 is closed in place.

In this embodiment, the marking portion 34 includes a first marking portion 341 and a second marking portion 342 different from the first marking portion 341, which are disposed at intervals, and when the linkage assembly 31 is located at the first position region, the first marking portion 341 is exposed from the observation port 111; when the linkage assembly 31 is located in the second position region, the second mark portion 342 is exposed from the observation port 111, so that the medical staff can visually identify the position of the safety mechanism 3 through the observation port 111, and judge whether the anvil assembly 2 is closed in place.

In this embodiment, the marking portion 34 is provided on the base 311, the first marking portion 341 and the second marking portion 342 are provided on the base 311 at intervals in the lateral direction, and the first marking portion 341 or the second marking portion 342 can be exposed to the observation port 111 when the base 311 moves in the lateral direction. Of course, the present invention is not limited to this, and for example, the mark portion 34 may be provided on the transmission lever 322, and in this case, the first mark portion 341 and the second mark portion 342 may be provided on the transmission lever 322 at an interval in the axial direction, so that the first mark portion 341 or the second mark portion 342 can be exposed from the observation port 111 when the transmission lever 322 moves in the axial direction.

In one embodiment, the first mark portion 341 is red, and the second mark portion 342 is green; of course, the first marking portion 341 and the second marking portion 342 may be distinguished by other colors or other means, such as patterns.

Further, when the slider 42 is disposed on the base 311 and the mark portion 34 is disposed on the base 311, the first mark portion 341 and the second mark portion 342 may be disposed on the slider 42, thereby simplifying the structure of the base 311.

Compared with the prior art, the medical anastomat 100 provided by the invention has the advantages that through the arrangement of the safety mechanism 3, only when the anvil component 2 is closed in place, the safety mechanism 3 can enable the triggering handle 13 and the nail pushing rod 12 to be in the second linkage state, so that a doctor can be effectively prevented from triggering the anastomotic nails and the cutter under the condition that the anvil component 2 is not closed in place, the forming of the anastomotic nails is poor, and even medical accidents are caused.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (15)

1. A medical stapler, comprising:

the anastomat body comprises a shell, a nail pushing rod and a firing handle, wherein the nail pushing rod is movably arranged in the shell, the firing handle is pivotally connected to the shell, and the nail pushing rod can move along the axial direction of the anastomat body;

an anvil assembly movable in an axial direction of the stapler body;

the medical anastomat is characterized by further comprising a safety mechanism movably arranged in the anastomat body, the safety mechanism enables the triggering handle and the nail pushing rod to be switched between an un-linked first state and a linked second state, and the safety mechanism is provided with:

the linkage assembly is movably arranged in the shell and is provided with a first position area which enables the firing handle and the nail pushing rod to be located in a first state and a second position area which enables the firing handle and the nail pushing rod to be located in a second state;

the transmission piece is arranged between the anvil component and the linkage component, and in the process that the anvil component moves towards the near end direction, the anvil component acts on the transmission piece and drives the linkage component to move from the first position area to the second position area through the transmission piece.

2. The medical stapler of claim 1, wherein: an abdicating space is formed between the firing handle and the nail pushing rod; when the linkage assembly is located the second position region, at least part of the structure of the linkage assembly stretches into the abdicating space, so that the firing handle can act on the nail pushing rod through the linkage assembly.

3. The medical stapler of claim 2, wherein: the first position area and the second position area are arranged along the transverse direction of the anastomat body; the linkage assembly is provided with an edge, the linkage assembly is movably connected to the base in the shell and a linkage piece matched with the base, the anvil assembly acts on the transmission piece in the process of moving towards the near end direction, the base drives the base to move along the transverse direction through the transmission piece, and the base pushes the linkage piece to enable at least part of structure of the linkage piece to stretch into the abdicating space.

4. The medical stapler of claim 3, wherein: the linkage piece is movably connected to the base and can move along the axial direction of the anastomat body.

5. The medical stapler of claim 3, wherein: and a guide structure for guiding the base to move along the transverse direction of the anastomat body is arranged between the base and the shell.

6. The medical stapler of claim 5, wherein: the guide mechanism is a sliding groove and a sliding block which are matched with each other.

7. The medical stapler of claim 3, wherein: the anvil assembly comprises an anvil, an anvil shaft connected to the proximal end of the anvil, and a projection arranged on the outer periphery of the anvil shaft, wherein the projection acts on the transmission piece to enable the transmission piece to move towards the proximal end.

8. The medical stapler of claim 7, wherein: the transmission part comprises a butting part sleeved on the anvil shaft and a transmission rod extending from the butting part to the near end, and the base is arranged at the near end of the transmission rod; the convex block acts on the abutting part to drive the transmission rod to move towards the near end, and the linkage assembly is driven to move from the first position area to the second position area.

9. The medical stapler of claim 8, wherein: the anastomat body further comprises a nail bin assembly arranged at the far end of the shell, and a guide groove penetrating along the axial direction is formed in the nail bin assembly; the transmission rod is movably arranged in the guide groove.

10. The medical stapler of claim 8, wherein: the far end of base is equipped with first guide structure, the near-end of transfer line is equipped with the second guide structure that first guide structure suits, first guide structure with the second guide structure cooperatees, so that the transfer line can drive the base is along lateral motion.

11. The medical stapler of claim 10, wherein: the first guide structure is a first guide inclined plane, and the distance from the first guide inclined plane to the axis is gradually reduced from the near end to the far end; the second guide structure is a second guide inclined plane, and the distance from the second guide inclined plane to the axis is gradually reduced from the near end to the far end.

12. The medical stapler of claim 1, wherein: the safety mechanism further comprises a reset mechanism, and the reset mechanism is used for driving the linkage assembly to move from the second position area to the first position area.

13. The medical stapler of claim 12, wherein: the first position area and the second position area are arranged along the transverse direction of the anastomat body; the linkage assembly is provided with a base which is transversely movably connected in the shell and a linkage piece which is axially movably arranged on the base, and the resetting mechanism is connected with the base and the shell.

14. The circumcision stapler according to claim 12 or 13, wherein: the reset mechanism is an elastic piece which is connected with the linkage assembly and the shell.

15. The medical stapler of claim 1, wherein: the medical anastomat is a circumcision anastomat, and the far end of the anvil component is provided with a glans penis cavity for accommodating glans penis.

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