CN111374731A - Medical anastomat - Google Patents

Abstract

The invention provides a medical stapler, comprising a stapler body, a nail push rod, a firing handle; an anvil assembly; Switch between the first state and the second state that can be linked, and the safety mechanism is provided with: a linkage assembly, and has a first position area where the firing handle and the push rod are located in the first state and a second position in the second state area; the transmission member is arranged between the anvil assembly and the linkage assembly, and during the movement of the anvil assembly to the proximal direction, the anvil assembly acts on the transmission member, and drives the linkage assembly from the first position area to the second position through the transmission member. The movement of the position area can effectively prevent the doctor from firing the staples and the cutter when the anvil assembly is not closed in place, resulting in poor staple formation and even medical accidents.

Description

medical stapler

technical field

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

Background technique

Medical stapler is a medical device that is often used for surgical suture cutting of esophagus, intestines and other digestive tracts and physiological tissues such as foreskin. During anastomosis, the two sections of tissue are restrained and an annular anastomotic ring is formed inside the tissue. The body bleeding produced during the process is expelled along with the contents, and the tissue is easier to heal after the operation.

Existing medical staplers for treating alimentary canal, excessive foreskin, 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 casing, a staple cartridge assembly arranged at the distal end of the casing and matched with the anvil assembly, and a staple push rod arranged in the casing and linked with the firing handle.

When the anvil assembly is closed in place, the medical stapler reaches a fireable state. In the prior art, the general operator judges whether the medical stapler has reached the fireable state by his own feeling, and fires the staples and the cutter after the medical stapler reaches the fireable state.

However, on the one hand, the operator makes a judgment based on his own feeling and experience, which is likely to cause the anvil assembly to not close properly, resulting in poor staple forming; When closed in place, the staples and the cutter are fired by mistake, resulting in poor staple formation and even medical accidents.

In view of this, it is necessary to provide a new medical stapler to solve the above problems.

SUMMARY OF THE INVENTION

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

In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions: a medical stapler, comprising:

a stapler body, comprising a casing, a nail push rod movably arranged in the casing, and a firing handle pivotally connected to the casing, the nail push rod can move along the axial direction of the stapler body;

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

A safety mechanism arranged in the stapler body is movable, and the safety mechanism switches between the firing handle and the push rod between a first state that is not linked and a second state that can be linked, and all The insurance institutions mentioned above have:

a linkage assembly, which is movably arranged in the casing and has a first position area in which the firing handle and the push rod are located in a first state and a second position area in a second state;

A transmission member is arranged between the anvil assembly and the linkage assembly, and during the movement of the anvil assembly to the proximal direction, the anvil assembly acts on the transmission member and is driven by the transmission member The linkage assembly moves from the first position area to the second position area.

As a further improved technical solution of the present invention, there is a vacant space between the firing handle and the nail push rod; when the linkage assembly is located in the second position area, at least part of the structure of the linkage assembly extends into the In the vacated space, the firing handle can act on the push rod through the linkage assembly.

As a further improved technical solution of the present invention, the first position area and the second position area are arranged along the transverse direction of the stapler body; the linkage assembly has a movably connected in the casing along the transverse direction. a base and a linkage part matched with the base, during the process of the anvil assembly moving towards the proximal direction, the anvil assembly acts on the transmission member, and the transmission member drives the base in the transverse direction In the movement, the base pushes the linkage member, so that at least a part of the structure of the linkage member extends into the clearance space.

As a further improved technical solution of the present invention, the linkage is movably connected to the base and can move along the axial direction of the stapler body.

As a further improved technical solution of the present invention, a guide structure for guiding the lateral movement of the base along the stapler body is provided between the base and the housing.

As a further improved technical solution of the present invention, the guiding mechanism is a sliding groove and a sliding block that cooperate with each other.

As a further improved technical solution of the present invention, the anvil assembly includes an anvil seat, an anvil shaft connected to the proximal end of the anvil seat, and a protrusion provided on the outer circumference of the anvil shaft, and the protrusion acts on the anvil shaft The transmission member moves the transmission member proximally.

As a further improved technical solution of the present invention, the transmission member includes a resisting part sleeved on the anvil shaft, a transmission rod extending from the resisting part to the proximal end, and the base is arranged on the transmission The proximal end of the rod; the protrusion acts on the abutting portion to drive the transmission rod to move toward the proximal end, and drive the linkage assembly to move from the first position area to the second position area.

As a further improved technical solution of the present invention, the stapler body further includes a staple cartridge assembly disposed at the distal end of the housing, and the staple cartridge assembly is provided with a guide groove penetrating in the axial direction; the transmission rod The movement is arranged in the guide groove.

As a further improved technical solution of the present invention, the distal end of the base is provided with a first guide structure, the proximal end of the transmission rod is provided with a second guide structure adapted to the first guide structure, and the first guide structure is provided at the proximal end of the transmission rod. A guide structure cooperates with the second guide structure, so that the transmission rod can drive the base to move laterally.

As a further improved technical solution of the present invention, the first guide structure is a first guide slope, and the distance between the first guide slope and the axis gradually decreases from the proximal end to the distal end; the second guide structure is the first guide slope. Two guide slopes, the distance between the second guide slope and the shaft center gradually decreases from the proximal end to the distal end.

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

As a further improved technical solution of the present invention, the first position area and the second position area are arranged along the transverse direction of the stapler body; the linkage assembly has a movably connected in the casing along the transverse direction. A base, a linkage member movably arranged on the base along the axial direction, and the reset mechanism connects the base and the casing.

As a further improved technical solution of the present invention, the reset mechanism is an elastic piece connecting the linkage assembly and the housing.

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.

The beneficial effect of the present invention is that: in the medical stapler of the present invention, by setting the safety mechanism, the safety mechanism can make the firing handle and the push rod in a linkable position only when the anvil assembly is closed in place. The second state can effectively prevent the doctor from firing the staples and the cutter when the anvil assembly is not closed in place, resulting in poor staple formation and even medical accidents.

Description of drawings

FIG. 1 is a schematic structural diagram of a medical stapler in the present invention.

FIG. 2 is a schematic structural diagram of the medical stapler shown in FIG. 1 from another angle.

FIG. 3 is a cross-sectional view along A-A of the medical stapler of FIG. 2 when the anvil assembly is not closed in place.

FIG. 4 is an enlarged view of B in FIG. 3 .

FIG. 5 is a schematic structural diagram of the insurance mechanism in FIG. 4 .

FIG. 6 is a schematic structural diagram of the medical stapler shown in FIG. 1 after removing the housing.

FIG. 7 is a schematic structural diagram of a push rod in the medical stapler shown in FIG. 1 .

FIG. 8 is a cross-sectional view of the medical stapler of FIG. 2 taken along A-A after the anvil assembly is closed and the handle is held.

FIG. 9 is a cross-sectional view of the medical stapler of FIG. 2 taken along A-A after the anvil assembly is closed in place.

Fig. 10 is a cross-sectional view of the medical stapler of Fig. 2, taken along A-A after the anvil assembly is closed in place and the handle is held.

Detailed ways

The present invention will be described in detail below with reference to the various embodiments shown in the accompanying drawings. Please refer to FIG. 1 to FIG. 10 , which are preferred embodiments of the present invention. However, it should be noted that these embodiments do not limit the present invention, and equivalent transformations or substitutions in functions, methods, or structures made by those of ordinary skill in the art according to these embodiments all fall within the protection scope of the present invention.

The words expressing position and direction described in the present invention are all based on the instrument operator, the end close to the instrument operator is the proximal end, and the end far from the instrument operator is the distal end; the axial direction in the present invention refers to the proximal end. The longitudinal direction of the component, 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 should not be construed as indicating or implying relative importance or implying the number of indicated technical features.

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

The medical stapler 100 in the embodiment of the present invention is a circular tube-type stapler, and a circumcision stapler for performing a circumcision operation is taken as an example for specific illustration, in order to apply a plurality of staples to the physiological tissue of the human body (here refers to the foreskin), while cutting the corresponding physiological tissue. However, it should be noted that the technical spirit involved in the following embodiments can be alternatively applied to other forms of staplers, such as a cylindrical stapler with double handles.

The circumcision stapler 100 includes a stapler body 1 , an anvil assembly 2 axially movably connected to the stapler body 1 , and a safety mechanism 3 movably provided in the stapler body 1 .

The stapler body 1 includes a casing 11 , a nail push rod 12 movably disposed in the casing 11 , a firing handle 13 pivotally connected to the casing 11 , and a distal end of the casing 11 . A staple cartridge assembly 14 at the end, a knob 15 provided at the proximal end of the housing 11 to drive the anvil assembly 2 to move in the axial direction of the stapler body 1, and the staple push rod 12 can move along the stapler The axial movement of the device body 1.

Preferably, the casing 11 is formed by splicing two sub casings.

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 push rod 12 , and a rotating portion 132 for the medical staff to operate. Operation unit 133 . When the firing handle 13 is rotated, the second engaging portion 132 directly or indirectly acts against the push rod 12 to drive the push rod 12 to move in the distal direction to realize the circumcision Firing of the stapler 100. It can be understood that, the linkage between the firing handle 13 and the nail push rod 12 is not limited to this.

Further, the firing handle 13 and the nail push rod 12 have a first state that is not linked and a second state that can be linked. It can be understood that, in the embodiment in which the push rod 12 is pushed against the second engaging portion 132 to perform the firing motion, the above-mentioned firing handle 13 and the push rod 12 are in the unlinked first position. A state means that during the process of holding the firing handle 13 to rotate the firing handle 13 , the second engaging portion 132 cannot directly or indirectly act on the nail push rod 12 , so that the nail push rod 12. The firing motion cannot be performed; correspondingly, the above-mentioned second state that can be linked means that when the firing handle 13 is held and the firing handle 13 is rotated, the second connecting portion 132 will act directly or indirectly On the nail push rod 12, the nail push rod 12 is made to perform a firing motion.

In a specific embodiment, the nail push rod 12 is provided with a first connecting portion 121 , and there is a space for space between the firing handle 13 and the nail push rod 12 , that is, the firing handle 13 and the The push rods 12 are arranged at intervals along the axial direction of the stapler body 1 , and it can be understood that the clearance space is located 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 the firing handle 13 is rotated, and the second engaging portion 132 moves within the clearance space , it is always impossible to directly or indirectly resist and act on the nail push rod 12, so that the nail push rod 12 cannot perform a firing motion. It can be understood that at this time, the firing handle 13 and the nail push rod 12 are in first state.

In addition, in this embodiment, the first engaging portion 121 is disposed at the proximal end of the push rod 12, of course, it is not limited to this, and the first engaging portion 121 can be disposed on the push rod 12 At any position in the axial direction of 12 , as long as the firing handle 13 and the push rod 12 are in the second state, the firing handle 3 can be rotated by acting on the first engaging portion 121 to drive the firing handle 3 . The push rod 12 can move to the distal end.

Further, a first return spring 16 is sleeved on the nail pushing rod 12, and is in a second state between the firing handle 13 and the nail pushing rod 12, holding the firing handle 13 to drive the During the movement of the push rod 12 in the distal direction, the first return spring 16 is gradually compressed. When the holding force exerted on the firing handle 13 is cancelled, the push rod 12 is returned to the initial position proximally under the driving of the biasing force of the first return spring 16 .

Specifically, a convex portion may be provided on the nail push rod 12 , the proximal end of the first return spring 16 abuts on the convex portion, and the distal end of the first return spring 16 abuts against the nail On the nail barrel of the cartridge assembly 14, of course, it is not limited to this, and the distal end of the first return spring 16 can also abut on the housing 11, as long as the distance of the first return spring 16 can be realized. end limit.

Preferably, the protruding portion is a part of the first engaging portion 121 to simplify the structure of the nail push rod 12 . At this time, the first engaging portion 121 (protruding portion) is provided on the push nail. In the embodiment of the proximal end of the rod 12, the push rod 12 is T-shaped in the direction from the proximal end to the distal end. Of course, it is not limited to this.

Further, a second reset elastic member 17 is disposed between the firing handle 13 and the housing 11 . During the process of holding the firing handle 13 and rotating the firing handle 13 , the second reset elastic member 17 is The member 17 is gradually compressed, and when the gripping force exerted on the firing handle 13 is cancelled, the firing handle 13 returns to the initial position under the action of the biasing force of the second restoring elastic member 17 .

In a specific embodiment, the second reset elastic member 17 is a spring, of course, it is not limited to this, and the second reset elastic member 17 can also be an elastic block.

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

Referring to FIG. 3 , the staple cartridge assembly 14 includes a staple barrel 141 provided at the distal end of the housing 11 , a staple push piece 142 provided in the staple barrel 141 , and a staple push piece provided on the staple barrel 141 . The cutter on 142 , and the staple cartridge 143 located at the distal end of the staple barrel 141 . The structures of the components in the staple cartridge assembly 14 and the matching relationship between them are all existing in the art, and will not be repeated here.

The proximal end of the nail pushing piece 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 piece 142 to move synchronously.

The anvil assembly 2 includes an anvil 21 matched with the staple cartridge assembly 14 , an anvil shaft 22 connected to the proximal end of the anvil 21 , and the anvil shaft 22 penetrates through 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 along the axial direction of the stapler body 1, so that the anvil 21 moves toward or away from the staple cartridge assembly 14. When the anvil assembly 2 is closed in place, the anvil 21 and the staple cartridge 143 clamp the physiological tissue, which is convenient for subsequent anastomosis and cutting, and can improve match effect.

In a specific embodiment, the anvil shaft 22 includes a segmented anvil shaft body 221 and a screw rod 222 , the anvil shaft body 221 is fixedly connected to the anvil 21 , and the screw rod 222 is connected to the The anvil shaft body 221 and the knob 15 . Of course, it is not limited to this, and the anvil shaft body 221 and the screw rod 222 may also be integrally provided.

It can be understood that, in the embodiment in which 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.

3-10, the safety mechanism 3 is movably arranged in the stapler body 1, and the safety mechanism 3 can make the firing handle 13 and the push rod 12 in the switching between the first state and the second state.

Further, as shown in FIGS. 4-5 , the safety mechanism 3 includes a linkage assembly 31 movably disposed in the housing 11 , and axially disposed between the anvil assembly 2 and the linkage assembly 31 . 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 linkage assembly 31 to move through the transmission member 32 .

The linkage assembly 31 can move between a first position area in which the firing handle 13 and the push rod 12 are located in the first state and a second position area in the second state. It can be understood that, in the embodiment in which the clearance space is provided, when the linkage assembly 31 is located in the first position area, the linkage assembly 31 is far away from the clearance space, so that the firing handle 13 is located in the first position area. In the empty firing state, that is, when the firing handle 13 is rotated, the second engaging portion 132 of the firing handle 13 cannot directly or indirectly act on the push rod 12, so that the stapler cannot be fired. When the firing handle 13 and the push rod 12 are in the first state; when the linkage assembly 31 is located in the second position area, at least a part of the structure of the linkage assembly 31 extends into the vacant space, The firing handle 13 can indirectly act on the nail push rod 12 through the linkage assembly 31. At this time, the firing handle 13 and the nail push rod 12 are in the second state. By rotating the firing handle 13 The push rod 12 can be driven in a distal direction to fire the stapler.

Further, the first location area and the second location area are arranged along the lateral direction of the stapler body 1 , and in this embodiment, the second location area is defined to be more precise than the first location area. Close to the axis of the stapler body 1 , that is, the second position area is closer to the push rod 12 than the first position area. Of course, it is not limited to this.

Specifically, the linkage assembly 31 has a base 311 movably connected to the housing 11 , and a linkage 312 matched with the base 311 , the base 311 can move in the lateral direction, and the anvil During the movement of the assembly 2 toward the proximal direction, the anvil assembly 2 acts on the transmission member 32 to drive the base 311 to move laterally, and the base 311 pushes the linkage member 312 to make the linkage At least a part of the structure of the piece 312 extends into the space for allowing the firing handle 13 and the nail push rod 12 to switch to the second state, which is convenient for subsequent firing.

4-5, the linkage 312 is movably connected to the base 311, and the linkage 312 can move along the axial direction of the stapler body 1. When the linkage assembly 31 is located in the second position area, at least a part of the structure of the linkage member 312 protrudes into the clearance space to engage the first engaging portion 121 and the second engaging portion 132 . Holding the firing handle 13, the firing handle 13 pushes the linkage 312 to move in the distal direction, and the linkage 312 drives the push rod 12 to move in the distal direction to fire the staples and and cutter.

Of course, it is not limited to this, and the linkage member 312 can also be movably connected to the nail push rod 12. It can be understood that the linkage member 312 only needs to be set to be able to move in the first position area and the second position in the lateral direction. It only needs to move between the two position regions, and can move in the distal direction synchronously with the push rod 12 .

Further, the stapler body 1 also has a guide channel 18 disposed between the first engaging portion 121 and the second engaging portion 132 , the guide channel 18 is located in the space for vacancy, and the linkage assembly When the 31 moves between the first position area and the second position area, the guide channel 18 guides the linkage member 312 to move laterally along the stapler body 1, and restricts the position of the linkage member 312, so that all The linkage member 312 is located between the first engaging portion 121 and the second engaging portion 132, so that when the linkage assembly 31 is located in the second position area, the firing handle 13 and the push rod 12 are in the second state ; When the linkage assembly 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 The linkage 312 shakes, so that the firing movement is more stable.

It can be understood that when the linkage assembly 31 is located in the first position area, the linkage member 312 is located outside the guide channel 18 , so that between the first engaging portion 121 and the second engaging portion 132 Spaced apart, the firing handle 13 and the push rod 12 are in the first state.

In the specific embodiment shown in FIG. 7 , the first engaging portion 121 has extension walls 122 located on opposite sides in the axial direction, and the extending walls 122 protrude toward the second engaging portion 132 along the circumferential direction. extending, the guide channel 18 is formed between the extending walls 122 . Of course, it is not limited to this.

Further, a lateral guide structure 4 is provided between the base 311 and the housing 11 to guide the lateral movement of the base 311 along the stapler body 1 so that the transmission member 32 can drive The linkage assembly 31 moves between the first position area and the second position area in the lateral direction.

Further, there are two lateral guide mechanisms 4 symmetrically disposed between the base 311 and the housing 11 to further enhance the stability of the base 311 along the lateral movement. Limited to this, the lateral guide mechanism 4 can also be provided only on one side of the base 311 .

In this embodiment, the lateral guide structure 4 is a sliding groove 41 and a sliding block 42 that cooperate with each other. The sliding groove 41 extends laterally of the stapler body 1 to guide the base 311 along the It is slidably connected to the casing 11 laterally. Of course, it is not limited to this, and it can be understood that the lateral guide structure 4 only needs to be configured to be capable of slidingly connecting the base 311 to the casing 11 in the lateral direction.

In an embodiment, the slider 42 is disposed on the base 311 , and the sliding slot 41 is disposed on the housing 11 . Of course, it is not limited to this. For example, the sliding block 42 may also be provided on the housing 11 , and in this case, the sliding slot 41 is provided on the base 311 .

It can be understood that, in the embodiment with two firing handles 13 , the circumcision stapler 100 has two safety mechanisms 3 that are respectively matched with the firing handles 13 , and the two safety mechanisms 3 are provided separately. The two safety mechanisms 3 are integrally disposed on opposite sides of the nail push rod 12 to enhance the effect of the safety mechanisms 3 . Of course, it is not limited to this, for example, the specific number of the insurance institutions 3 is not limited to the above two, and can be set according to specific conditions; or two of the insurance institutions 3 can be set separately.

The transmission member 32 is movably arranged in the stapler body 1. When the anvil assembly 2 moves toward the proximal direction, the anvil assembly 2 acts on the transmission member 32 to drive the transmission member 32 toward the proximal end. The transmission member 32 drives the linkage assembly 31 to move from the first position area to the second position area, converts the axial movement of the transmission member 32 into the lateral movement of the linkage 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 to realize the linkage between the firing handle 13 and the nail push rod 12, so that only when the 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 can be linked together. The circumcision stapler 100 is in a fireable state, which can effectively prevent the doctor from holding the firing handle 13 under the condition that the anvil assembly 2 is not closed in place to fire the staples and the cutter, resulting in poor staple formation, or even poor staple formation. lead to medical malpractice.

The above-mentioned firing state means that the anvil assembly 2 is closed in place, so that the staple cartridge assembly 14 and the foreskin to be cut by the anvil 21 have been clamped in place, and the firing handle 13 and the nail push rod are in place. 12 is also in the state when it is in the second state that can be linked.

Specifically, in the axial direction, the transmission member 32 is located between the anvil assembly 2 and the base 311. When the anvil assembly 2 moves toward the proximal direction, the anvil assembly 2 acts on the anvil assembly 2. The transmission member 32 drives the base 311 to move laterally to the second position area 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 protruding block 23 disposed on the outer periphery of the anvil shaft 22, and the transmission member 32 is disposed at the proximal end of the protruding block 23, when the anvil assembly 2 moves toward the proximal end , the protruding block 23 acts against the transmission member 32 to drive the transmission member 32 to move toward the proximal end.

In a specific embodiment, the transmission member 32 is sleeved on the anvil shaft 22 , and the protruding block 23 is annular so as to resist and act on the transmission member 32 . However, it is not limited to this, and the protrusions 23 may not be annular. It is understood that the protrusions 23 only need to be able to resist and act on the transmission member 32 .

In the embodiment in which the anvil shaft 22 has a segmented anvil shaft body 221 and the screw rod 222, the protrusions 23 may be provided on the outer circumference of the anvil shaft body 221, or may be provided on the wire rod Outer circumference of rod 222 .

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 . Therefore, in the embodiment in which the protrusions 23 are provided on the outer circumference of the anvil shaft body 221 , the The protrusion 23 can be 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 toward the proximal end, the anvil The proximal end of the shaft body 221 abuts on the transmission member 32, and pushes the transmission member 32 and the anvil assembly 2 to move in the proximal direction synchronously, so as to drive the linkage member 31 from the first position area to the proximal direction. The second position area moves. Of course, it is not limited to this, and the protrusions 23 can also be provided at other axial positions of the anvil shaft body 221 , as long as the protrusions 23 are located when the anvil assembly 2 moves toward the proximal direction. It only needs to be able to drive the transmission member 32 to move in the proximal direction synchronously.

Specifically, the transmission member 32 includes a resisting portion 321 sleeved on the anvil shaft 22 , and a transmission rod 322 extending proximally from the resisting portion 321 . The blocks 23 abut against each other. When the anvil assembly 2 moves toward the proximal end, the protrusions 23 push against the abutting portion 321 to drive the transmission rod 322 to move toward the proximal end and drive the linkage assembly. 31 moves from the first position area to the second position area.

Further, the staple cartridge assembly 14 is provided with a guide groove 144 disposed axially through it, and the transmission rod 322 enters the housing 11 from the inner side of the staple cartridge assembly 14 through the guide groove 144 , Matching with the base 311 , that is, the proximal end of the transmission rod 322 is abutted and matched with the base 311 .

In the present invention, the inner side of the staple cartridge assembly 14 refers to the side of the staple cartridge assembly 14 that is close to the axial center of the staple cartridge assembly 14 , and more specifically, refers to the nail pushing piece 142 that is close to the axial center of the staple cartridge assembly 14 side. It can be understood that the guide groove 144 penetrates the staple cartridge 141 and the staple pushing piece 142 at the same time, so that the transmission rod 322 can pass through the guide groove 144 from the inner side of the staple cartridge assembly 14 . into and out of the housing 11 .

During the movement of the transmission member 32 along the axial direction of 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 .

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

In this embodiment, the axial guide structure is a through groove 3221 and a guide block 1411 that cooperate with each other. When the transmission member 32 moves in the axial direction, the through groove 3221 moves along the guide block 1411 to Guide and limit the movement of the transmission member 32 .

In a specific embodiment, the through groove 3221 is provided on the transmission rod 322 and extends in the axial direction, the guide block 1411 is provided on the nail barrel 141 and is located in the guide groove 144, That is, the guide block 1411 divides the guide groove 144 into two independent guide grooves 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 guide and cooperate with the through groove 3221 .

Further, 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 to this, and the transmission rod 322 can also be fixedly connected with the abutting portion 321 .

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

Further, the linkage assembly 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 end moves, the first guide structure 313 cooperates with the second guide structure 323 to make the linkage assembly 31 move laterally to the second position area. Of course, it 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 can be understood that when the linkage assembly 31 moves to the first position in the lateral direction, the first guide structure 313 cooperates with the second guide structure 323 to drive the transmission member 32 to the distal end in the axial direction directional movement.

It can be understood that, in this embodiment, the first guide structure 313 is provided at the distal end of the base 311 , and the second guide structure is provided at the proximal end of the transmission rod 322 . Of course, it is not limited to this.

Please refer to the embodiment shown in FIG. 5 , the first guide structure 313 is a first guide slope, the second guide structure 323 is a second guide slope, that is, the base 311 and the transmission rod 322 The guiding inclined planes are used for cooperation between them, the structure is relatively simple, and the cooperation is stable. Of course, it is not limited to this.

Specifically, the distances between the first guide slope and the second guide slope from the shaft center gradually decrease from the proximal end to the distal end. When the transmission member 32 moves toward the proximal end, the linkage assembly can be driven. 31 moves from the first position area to the second position area closer to the axis.

Further, the staple cartridge assembly 14 further includes a limiting barrel 145 disposed in the staple barrel 141 . When the anvil assembly 2 moves in the axial direction of the stapler body 1 , the anvil assembly 2 moves along the axis of the stapler body 1 . The movement of the limiting cylinder 145 can guide the movement of the anvil assembly 2 to prevent the anvil assembly 2 from shaking during the movement.

The transmission member 32 is located at the proximal end of the limiting cylinder 145. In the embodiment in which the anvil shaft 22 has a segmented anvil shaft body 221 and a screw rod 222, in the proximal direction of the anvil assembly 2 During the movement, the proximal end of the anvil shaft body 221 penetrates from the proximal end of the limiting cylinder 145 and acts on the transmission member 32 to push the transmission member 32 to move synchronously with the anvil assembly 2 . The proximal direction moves to drive the linkage assembly 31 to move from the first position area to the second position area.

Further, the anvil shaft body 221 is provided with a first matching portion 223, and the limiting cylinder 145 is provided with a second matching portion 1451. When the anvil assembly 2 is closed in place, the first matching portion 223 and the The second matching portion 1451 cooperates to restrict the anvil assembly 2 from continuing to move in the proximal direction, preventing the closure from being too tight and preventing the foreskin tissue from being over-pressed.

In this embodiment, the first matching portion 223 is a stepped portion disposed at the distal end of the anvil shaft body 221 , and the second matching portion 1451 is the distal end surface of the limiting cylinder 145 . When the anvil assembly 2 is closed in place, the proximal end surface of the step portion abuts against the distal end surface of the limiting cylinder 145 to restrict the anvil assembly 2 from continuing to move toward the proximal end, preventing the anvil assembly 2 from being closed too tightly and preventing The foreskin tissue is over-pressed.

Of course, it is not limited to this, for example, the second matching portion 1451 can also be provided at the proximal end of the limiting cylinder 145 and formed to protrude toward the centerline 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 restrict 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. During the movement of the anvil assembly 2 in the distal direction, the reset mechanism 33 drives the linkage assembly 31 from the second position area to the first position area. The position area is moved to switch between the firing handle 13 and the nail push rod 12 to the first state to prevent false firing.

In the embodiment in which the linkage 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 in a lateral direction The movement of the first position area drives the linkage member 312 to move in a direction away from the guide channel 18 synchronously. But not limited to this, it can be understood that when the linkage member 312 is connected to the nail push rod 12 , the reset mechanism 33 can be disposed between the linkage member 312 and the nail push 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 pusher The nail rods 12 are switched to the first state to prevent false firing.

In this embodiment, the reset mechanism 33 is an elastic member connecting the base 311 and the housing 11 , preferably a tension spring, of course, it is not limited to this, the reset mechanism 33 can also be It is a structure such as an elastic block, as long as the linkage assembly 31 can be driven to move from the second position area to the first position area.

During the movement of the linkage assembly 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 is withdrawn The pressure applied to the linkage assembly 31, driven by the biasing force of the tension spring, the linkage assembly 31 moves from the second position area to the first position area, and at the same time, the linkage assembly 31 drives the The transmission member 32 moves in the distal direction.

Further, the safety mechanism 3 further includes a limiting structure 35 arranged in the stapler body 1 , when the linkage assembly 31 is located in the first position area, the limiting structure 35 is used to limit the transmission The transmission member 32 moves to the distal end to enhance the stability of the transmission member 32, so that the transmission member 32 can act on the linkage assembly 31 when the transmission member 32 moves towards the proximal end.

Specifically, the limiting structure 35 includes a first abutting surface disposed at the distal end of the housing 11 . When the linkage assembly 31 is located in the first position area, the transmission rod 322 abuts against the first abutting surface. An abutting surface restricts the movement of the transmission member 32 to the distal end.

In a specific embodiment, the transmission rod 322 is provided with a second abutting surface 3222 which is parallel to and opposite to the first abutting surface. When the linkage assembly 31 is located in the first position area, the The second abutting surface 3222 abuts against the first abutting surface, restricts the distal movement of the transmission member 32 , and at the same time enhances the stability of the transmission member 32 .

Further, the limiting mechanism 35 further includes a receiving portion 351 disposed at the proximal end of the nail barrel 145 . When the linkage assembly 31 is located in the first position area, at least part of the resisting portion 321 is structurally received. Inside the receiving portion 351 , the abutting portion 321 abuts against the proximal end of the nail barrel 145 , restricting the movement of the transmission member 32 to the distal end, and also restricting the rotation of the transmission member 32 .

Further, the insurance mechanism 3 is provided with a marking portion 34, and the casing 11 is provided with an observation port 111 for exposing the marking portion 35 to observe the position of the insurance mechanism 3, so that the medical staff can The position of the safety mechanism 3 can be visually identified through the observation port 111, so as to determine whether the anvil assembly 2 is closed in place.

In this embodiment, the marking portion 34 includes a first marking portion 341 arranged at intervals and a second marking portion 342 that is different from the first marking portion 341. When the linkage assembly 31 is located in the first position area, the The first marking portion 341 is exposed from the observation port 111; when the linkage assembly 31 is located in the second position area, the second marking portion 342 is exposed from the observation port 111, so that medical staff can pass through the observation port 111. The observation port 111 can intuitively identify the position of the safety mechanism 3 , thereby judging whether the anvil assembly 2 is closed in place.

In this embodiment, the marking portion 34 is provided on the base 311 , and the first marking portion 341 and the second marking portion 342 are provided on the base 311 at intervals in the lateral direction. When the seat 311 moves laterally, the first marking portion 341 or the second marking portion 342 can be exposed to the observation port 111 . Of course, it is not limited to this. For example, the marking portion 34 may also be provided on the transmission rod 322. In this case, the first marking portion 341 and the second marking portion 342 are arranged at intervals along the axial direction. Therefore, when the transmission rod 322 moves in the axial direction, the first marking portion 341 or the second marking portion 342 can be exposed from the observation port 111 .

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

Further, when the slider 42 is provided on the base 311 and the marking portion 34 is provided on the base 311 , the first marking portion 341 and the second marking portion 342 may be It is arranged on the slider 42 to simplify the structure of the base 311 .

Compared with the prior art, in the medical stapler 100 of the present invention, by setting the safety mechanism 3, only when the anvil assembly 2 is closed in place, the safety mechanism 3 will cause the firing handle 13 to interact with the pusher. The staple rod 12 is in the second state that can be linked, which can effectively prevent the doctor from firing the staples and the cutter when the anvil assembly 2 is not closed in place, resulting in poor staple formation and even medical accidents. .

It should be understood that although this specification is described in terms of embodiments, not every embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole, and each The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Changes should all be included within the protection 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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