CN111374729A - Medical anastomat - Google Patents

Abstract

The invention provides a medical stapler, comprising a stapler body, a casing and a firing mechanism; an anvil assembly that can move along the axial direction of the stapler body; a safety mechanism for switching the firing mechanism between a non-fireable state and a fireable state mechanism, and the safety mechanism has: a safety assembly, which has a first position area that makes the firing mechanism in a non-fireable state and a second position area in a fireable state; a transmission member, in the process of the anvil assembly moving towards the proximal end, the anvil assembly Acting on the transmission element, and then driving the safety assembly to move from the first position area to the second position area; the lateral guide structure is used to guide the safety assembly to move laterally along the stapler body; it can effectively prevent the doctor from closing the anvil assembly in place. Under the circumstances, the staples and the cutter are fired, resulting in poor staple formation and even medical accidents; a lateral guide structure for guiding the lateral movement of the insurance component is provided to enhance the stability of the movement of the insurance component.

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 and a firing mechanism cooperating with the casing;

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

A safety mechanism provided between the anvil assembly and the firing mechanism is movable, the safety mechanism switches the firing mechanism between a non-fireable state and a fireable state, and the safety mechanism has:

a safety component, which is movably arranged in the casing, and has a first position area in which the firing mechanism is in a non-fireable state and a second position area in a fireable state;

A transmission member is arranged between the anvil assembly and the safety assembly. During the movement of the anvil assembly toward the proximal direction, the anvil assembly acts on the transmission member, and by driving the transmission member to move, further driving the safety component to move from the first position area to the second position area;

The lateral guide structure is used for guiding the safety component to move between the first position area and the second position area along the lateral direction of the stapler body.

As a further improved technical solution of the present invention, the lateral guide structure includes a first guide member disposed on the housing, and a second guide member disposed on the safety component, the first guide member A member cooperates with the second guide member to allow the safety assembly to move laterally of the stapler body.

As a further improved technical solution of the present invention, the first guide member and the second guide member are sliding grooves and sliding blocks that cooperate with each other, the sliding grooves extend along the transverse direction of the stapler body, and the The sliding block is arranged on the safety component.

As a further improved technical solution of the present invention, the insurance mechanism is provided with a marking portion, and the casing is provided with an observation port for exposing the marking portion to observe the position of the insurance mechanism.

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

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

As a further improved technical solution of the present invention, the marking portion is provided on the slider.

As a further improved technical solution of the present invention, the first position area is closer to the axis of the stapler body than the second position area; the safety component has a base, which is connected to the base to A locking portion matched with the firing mechanism, when the safety component is located in the first position area, the locking portion locks the firing mechanism, and when the safety component is located in the second position area, the locking portion part to unlock the firing mechanism.

As a further improved technical solution of the present invention, the firing mechanism includes a nail push rod movably arranged in the housing, and a firing handle pivotally connected to the housing, the nail push rod can move along the stapler Axial movement of the body; the second position area is closer to the axis of the stapler body than the first position area, and when the safety component is located in the first position area, the firing handle and the The nail push rods cannot be linked, and when the safety component is located in the second position area, the firing handle and the nail push rod can be linked.

As a further improved technical solution of the present invention, the nail push rod and the firing handle are axially spaced apart and oppositely provided with a first connecting portion and a second connecting portion, and a guide is formed between the first connecting portion and the second connecting portion. a channel; when the safety assembly is located in the first position area, the safety assembly is not in the guide channel, and when the safety assembly is located in the second position area, at least a part of the structure of the safety assembly enters the guide channel A guide channel is used to connect the push rod and the firing handle.

As a further improved technical solution of the present invention, the safety component has a base that is movably connected to the housing, and the slider is arranged on the base to guide the base along the direction of the stapler body. Lateral movement.

As a further improved technical solution of the present invention, the safety assembly further has a linkage member that cooperates with the base, and the linkage member can move along the axial direction of the stapler body; In the process of moving in the direction, the anvil assembly acts on the transmission member, and drives the base to move laterally through the transmission member, and the base pushes the linkage member to make at least part of the structure of the linkage member. into the guide channel.

As a further improved technical solution of the present invention, the transmission member has an abutting portion matched with the anvil assembly, a transmission rod extending proximally from the abutting portion, the base and the transmission rod The inclined surfaces cooperate to drive the base to move toward the second position area.

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

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 effects of the present invention are: in the medical stapler of the present invention, by setting a safety mechanism, the safety mechanism can make the firing mechanism in a fireable state only when the anvil assembly is closed in place, which can effectively prevent doctors from Under the condition that the anvil assembly is not closed in place, the staples and the cutter are fired, resulting in poor staple forming and even medical accidents; at the same time, the safety assembly is arranged to guide the safety assembly along the stapler body. The lateral guide structure for lateral movement enhances the movement stability of the safety component.

Description of drawings

FIG. 1 is a schematic structural diagram of a medical stapler in the first embodiment of 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.

11 is a schematic structural diagram of a medical stapler in the second embodiment of the present invention.

12 is a C-C cross-sectional view of the medical stapler of FIG. 11 when the anvil assembly is not closed in place.

FIG. 13 is an enlarged view of D in FIG. 12 .

FIG. 14 is a schematic structural diagram of the insurance mechanism in FIG. 11 .

15 is a C-C cross-sectional view of the medical stapler of FIG. 11 with the anvil assembly closed in place.

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. 15 , 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.

Please refer to FIG. 1 to FIG. 10 , which are the medical stapler 100 in the first embodiment of the present invention. The medical stapler 100 is used for applying a plurality of staples to the physiological tissues of the human body, and simultaneously cutting the corresponding physiological tissues. organize.

The medical stapler 100 in the present invention is a cylindrical stapler, and a circumcision stapler for performing a circumcision operation is taken as an example for specific illustration, and the circumcision stapler is used to apply a plurality of staples onto the physiological tissue of the human body (here refers to the foreskin), and at the same time cut 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 housing 11 , a firing mechanism arranged on the housing 11 , a staple cartridge assembly 14 arranged at the distal end of the housing 11 , and a proximal end of the housing 11 . The knob 15 is used to drive the anvil assembly 2 to move in the axial direction of the stapler body 1 .

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

The firing mechanism includes a nail push rod 12 movably arranged in the housing 11 , and a firing handle 13 pivotally connected to the housing 11 . Axial movement to act on the cartridge assembly 14 to effect firing of the staples and/or cutter.

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.

Further, 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 , the anvil shaft 22 passing through the stapler 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 in the axial direction of the stapler body 1, so that the 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 to facilitate subsequent anastomosis and cutting. And can improve the matching 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.

The safety mechanism 3 is axially disposed between the anvil assembly 2 and the firing mechanism. The safety mechanism 3 has a safety assembly 31 movably disposed in the housing 11 and axially disposed in the The transmission member 32 between the anvil assembly 2 and the safety assembly 31 .

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

During the movement of the anvil assembly 2 in the proximal direction, the anvil assembly 2 acts on the transmission member 32 and drives the safety assembly 31 from the first position area to the second position through the transmission member 32 The area moves, so that when the anvil assembly 2 is closed in place, the safety assembly 31 moves to the second position area, so that the firing mechanism is in a fireable state, which is convenient for subsequent anastomotic cutting. That is, only when the anvil assembly 2 is closed in place, the firing mechanism can perform the firing motion, which can effectively prevent the doctor from holding the firing handle 13 to perform staples and cutting operations when the anvil assembly 2 is not closed in place. The firing of the knife leads to poor staple forming and even medical malpractice.

The first position area and the second position area are arranged along the transverse direction of the stapler body 1 , and when the anvil assembly 2 moves toward the proximal end, the transmission member 32 is driven to move toward the proximal end in the axial direction , the safety component 31 is driven by the transmission member 32 to move from the first position area to the second position area in the lateral direction.

Further, the safety mechanism 3 further includes a lateral guide structure 4 for guiding the lateral movement of the safety component 31 along the stapler body 1 , enhancing the stability of the movement of the safety component 31 and enhancing the safety Insurance effect of component 31.

It can be understood that the lateral guide structure 4 is provided between the safety component 31 and the housing 11 , and the lateral guide structure 4 includes a first guide member provided on the housing , and a second guide member disposed on the safety component 31 , the first guide member cooperates with the second guide member, so that the safety component 31 can follow the direction of the stapler body 1 . Lateral movement.

In a specific embodiment, there are two lateral guide structures 4 symmetrically disposed between the safety component 31 and the housing 11 to further enhance the stability of the safety component 31 along the lateral movement. Of course, it is not limited to this, and the lateral guide structure 4 may also be provided only on one side of the safety assembly 31 .

In a specific embodiment, the first guide member and the second guide member are a sliding groove 41 and a sliding block 42 that cooperate with each other, and the sliding groove 41 extends along the lateral direction of the stapler body 1 , In order to connect the safety component 31 to the casing 11 along the lateral direction slidingly. 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 able to slidably connect the safety component 31 to the housing 11 in the lateral direction.

In this embodiment, the sliding block 42 is provided on the safety component 31, and the sliding slot 41 is provided on the housing 11. Of course, it is not limited to this. For example, the sliding block 42 can be The sliding slot 41 is set on the safety component 31 at this time.

Further, the insurance mechanism 3 is provided with a marking portion 34, and the housing 11 is provided with an observation port 111 for exposing the marking portion 34 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 different from the first marking portion 341. When the insurance mechanism 3 is located in the first position area, the The first marking portion 341 is exposed from the observation port 111; when the insurance mechanism 3 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 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 .

In this embodiment, the marking portion 34 is provided on the safety component 31 . At this time, the first marking portion 341 and the second marking portion 342 are arranged on the safety component 31 at intervals along the lateral direction. When the safety assembly 31 moves in the lateral direction, 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 member 32. In this case, the first marking portion 341 and the second marking portion 342 are arranged at intervals along the axial direction. On the transmission member 32 , when the transmission member 32 moves in the axial direction, the first marking portion 341 or the second marking portion 342 can be exposed from the observation port 111 .

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

In an embodiment, the marking portion 34 is disposed on the base 311 , and the first marking portion 341 and the second marking portion 342 are disposed on the base 311 at intervals along the lateral direction. Of course, it is not limited to this, and it can be understood that the setting of the marking part 34 only needs to enable the medical staff to intuitively identify the position of the insurance mechanism 3 through the observation port 111 .

In this embodiment, the 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 The element 32 can drive the safety assembly 31 to move in the transverse direction between the first position area and the second position area. Of course, it is not limited to this. It can be understood that the lateral guide structure can also be provided at other parts of the safety assembly 31, as long as the safety assembly 31 can be guided in the lateral direction in the first position area. It is enough to move between it and the second position area.

In a preferred embodiment, the sliding block 42 is provided on the base 311, and the marking portion 34 is provided on the sliding block 42. It can be understood that at this time, the first marking portion is 341 and the second marking portion 342 are disposed on the slider 42 at intervals along the lateral direction, which simplifies the structure of the base 311 .

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 anvil assembly 2 is closed in place, the firing handle 13 is held, and the second engaging portion 132 directly or indirectly acts against the push rod 12 to drive the push rod 12 to the distal end The directional movement realizes the firing of the circumcision 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.

In this embodiment, the second engaging portion 132 indirectly acts on the nail pushing rod 12 , the nail pushing rod 12 is provided with a first engaging portion 121 , the firing handle 13 and the nail pushing rod 12 has 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 indirectly pushed against the second engaging portion 132 to perform the firing motion, when the above-mentioned firing mechanism is in a non-firing state, it means that the firing handle 13 and the The nail push rods 12 are in a first state without linkage. At this time, during the process of holding the firing handle 13 to rotate the firing handle 13, the second connecting portion 132 cannot directly or indirectly act on the firing handle 13. The screw push rod 12 cannot be fired; accordingly, when the above-mentioned firing mechanism is in a fireable state, it means that the firing handle 13 is in a linkageable first position with the screw push rod 12. In the second state, at this time, when the firing handle 13 is held, during the rotation of the firing handle 13 , the second connecting portion 132 will indirectly act on the nail push rod 12 to make the nail push rod 12 move. Firing movement.

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 nail 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.

In a specific embodiment, a space is provided between the firing handle 13 and the push rod 12 , that is, the firing handle 13 and the push rod 12 are along the axial direction of the stapler body 1 . It is understood that the clearance space is located between the first connecting portion 121 and the second connecting 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 this embodiment, the safety component 31 is a linkage component capable of switching the firing handle 13 and the nail push rod 12 between a first state and a second state. It can be understood that, in the embodiment in which the escape space is provided, when the safety assembly 31 is located in the first position area, the safety assembly 31 is far away from the escape 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 safety component 31 is located in the second position area, at least part of the structure of the safety component 31 protrudes into the vacant space, The firing handle 13 can indirectly act on the nail push rod 12 through at least part of the structure of the safety assembly 31. At this time, the firing handle 13 and the nail push rod 12 are in the second state, and by rotating the The firing handle 13 can drive the push rod 12 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 safety assembly 31 also has a linkage 312 matched with the base 311 . During the movement of the anvil assembly 2 in the proximal direction, the anvil assembly 2 acts on the transmission member 32 , the base 311 is driven to move laterally, the base 311 pushes the linkage 312, so that at least part of the linkage 312 extends into the space, so that the firing handle 13 and the The nail push rod 12 is switched to the second state, that is, the firing handle 13 can indirectly drive the nail push rod 12 to perform a firing motion through the linkage member 312 to facilitate subsequent firing.

4-5, the linkage member 312 is movably connected to the base 311, and the linkage member 312 can move along the axial direction of the stapler body 1. When the safety component 31 is located in the second position area, at least a part of the structure of the linkage member 312 is located in the clearance space to engage with 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, a guide channel 18 is formed between the first engaging portion 121 and the second engaging portion 132 , the guide channel 18 is located in the vacant space, and the safety component 31 is located in the first position area and the second position When moving between regions, 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 the linkage member 312 is located at the first engaging portion 121 and the second engaging portion 132, so that when the safety component 31 is located in the second position area, the firing handle 13 can act on the nail push rod 12 through the linkage 312, that is, make the The firing handle 13 and the push rod 12 are in the second state; when the safety component 31 is located in the second position area, the guide channel 18 accommodates at least part of the linkage 312, and when the firing is rotated During the process of handling the handle 13, the guide channel 18 can limit the shaking of the linkage member 312, so that the firing movement is more stable.

It can be understood that, when the safety component 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 circumferential direction, and the extending walls 122 protrude toward the second engaging portion 132 in the axial direction , the guide channel 18 is formed between the extending walls 122 . Of course, it is not limited to this.

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.

Please refer to FIGS. 11-15 , which are the second embodiment of the medical stapler in the present invention. The difference between this embodiment and the first embodiment is that the second engaging portion 132 directly resists and acts on the pusher. The nail rod 12, when the safety assembly 31 is located in the first position area, the anvil assembly 2 is not closed in place, at this time, the safety assembly 31 locks the firing mechanism, at this time, the firing mechanism is in a non-firing state. state; when the safety assembly 31 is located in the second position area, the safety assembly 31 unlocks the firing mechanism, and at this time, the firing mechanism is in a fireable state.

In this embodiment, it is defined that the first location area is closer to the axis of the stapler body 1 than the second location area, that is, the first location area is closer to the second location area The nail push rod 12 .

Further, the safety component 31 also has a locking portion 314 protruding from the base 311 toward the firing mechanism.

In this embodiment, when the safety component 31 is located in the first position area, the locking portion 314 locks the push rod 12 to restrict the distal movement of the push rod 12. It can be understood that at this time, Even if the firing handle 13 is held, the locking portion 314 restricts the push rod 12 from moving in the distal direction, so the firing handle 13 against the push rod 12 cannot be rotated.

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

In this embodiment, the nail pushing rod 12 further has a resisting block 123 that cooperates with the locking portion 314. During the closing process of the anvil assembly 2, the safety assembly 31 is located in the first position area, and all the The locking portion 314 presses against the distal end of the resisting block 123 to lock the push rod 12 and prevent the push rod 12 from firing.

Of course, it can be understood that the locking manner of the locking portion 314 for locking the nail push rod 12 is not limited to this. For example, the locking portion 314 may be configured as a groove, when the safety component 31 is located at the first position At least part of the structure of the resisting block 123 is accommodated in the locking portion 314 (groove) to lock the nail push rod 12; When the safety component 31 is in the first position, at least a part of the locking portion 314 is limited in the limiting groove to lock the push rod 12 .

In an embodiment, the resisting block 123 is disposed at the proximal end of the push rod 12 and extends in the lateral direction, and the locking portion 314 is formed extending from the base 311 toward the proximal end, so as to Match with the resisting block 123 . Of course, it is not limited to this, and the abutting block 123 can also be connected to any other position in the longitudinal direction of the nail pushing rod 12, as long as the anvil assembly 2 is not closed in place, it can be connected with the locking portion 314 is matched, and the nail push rod 12 can be locked.

When the safety assembly 31 is located in the second position area, the firing mechanism is unlocked, and the push rod 12 can be fired for firing of staples and/or cutters. It can be understood that when the safety assembly 31 is located in the second position area, the locking portion 314 is not on the movement path of the nail push rod 12, nor is it on the rotation path of the firing handle 13, so that the The firing handle 13 can be rotated to drive the push rod 12 to perform firing motion, thereby completing the firing of the medical stapler 100 .

Except for the above differences, the other structures of the second embodiment of the present invention are the same as those of the first embodiment, and thus will not be repeated.

Hereinafter, the medical stapler in the present invention will be described in detail by taking the medical stapler in the first embodiment as an example.

Further, 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 moves toward the proximal end, the transmission member 32 drives the safety component 31 to move from the first position area to the second position area, and converts the axial movement of the transmission member 32 into the lateral movement of the safety component 31, And 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 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. When the circumcision stapler 100 is in a fireable state, it can effectively prevent the doctor from holding the firing handle 13 when the anvil assembly 2 is not closed in place to fire the staples and the cutter, resulting in the formation of the staples. Bad, and even 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, 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 transmission member 32, and the anvil assembly 2 acts on the transmission member 32 through The transmission member 32 drives the base 311 to move laterally toward the second position area, 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 32, 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 safety 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 can drive the anvil assembly 2 when the anvil assembly 2 moves in the proximal direction The transmission member 32 can 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 safety 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 arranged 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 direction synchronously, and to drive the corresponding safety components 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 safety 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 safety component 31 move to the second position area in the lateral direction. Of course, it is not limited to this, and a guide structure may be provided only on the safety component 31 or the transmission member 32 , as long as the relative movement between the transmission member 32 and the safety component 31 can be guided.

It can be understood that, when the safety assembly 31 moves to the first position area in the lateral direction, the first guide structure 313 cooperates with the second guide structure 323 to drive the transmission member 32 to move away in the axial direction. movement in the end direction.

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, and 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 safety component can be driven. 31 moves from the first position area to the second position area closer to the axis.

It can be understood that, in the second embodiment, the distances between the first guide inclined surface and the second guide inclined surface from the shaft center gradually increase from the proximal end to the distal end, so that when the transmission member 32 moves toward the axis, When the proximal end moves, the safety component 31 can be driven to move from the first position area to the second position area further away from 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 protrudes 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 safety component 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 foreskin tissue from being excessively compressed due to over-tight closure.

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 stepped portion abuts against the distal end surface of the limiting cylinder 145 to restrict the anvil assembly 2 from continuing to move in the proximal direction, preventing over-tightening, resulting in 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 safety 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 312 is connected to the push rod 12 , the reset mechanism 33 can also be provided on the linkage 312 and the push rod 12 so that when the base 311 withdraws 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 The nail push 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 safety component 31 can be driven to move from the second position area to the first position area.

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

Further, the safety mechanism 3 further includes a limit structure 35 arranged in the stapler body 1 , when the safety component 31 is located in the first position area, the limit 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 safety component 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 safety component 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 the first abutting surface and opposite to the first abutting surface. When the safety component 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 safety component 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, 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 canceled, 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 (protrusion) is provided on the push nail. In the embodiment of the proximal end of the rod 12, the push rod 12 is T-shaped. 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 holding force applied to the firing handle 13 is canceled, the firing handle 13 returns to the initial position under the drive 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.

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. At the same time, a lateral guide structure 4 for guiding the lateral movement of the safety component 31 along the stapler body 1 is provided to enhance the stability of the movement of the safety component 31 .

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: a stapler body, comprising a casing and a firing mechanism cooperating with the casing; an anvil assembly movable in the axial direction of the stapler body; It is characterized in that, the medical stapler further comprises: a safety mechanism movably arranged between the anvil assembly and the firing mechanism, the safety mechanism makes the firing mechanism switch between a non-fireable state and a fireable state , and the insurance institution has: a safety component, which is movably arranged in the casing, and has a first position area in which the firing mechanism is in a non-fireable state and a second position area in a fireable state; A transmission member is arranged between the anvil assembly and the safety assembly. During the movement of the anvil assembly toward the proximal direction, the anvil assembly acts on the transmission member, and by driving the transmission member to move, further driving the safety component to move from the first position area to the second position area; The lateral guide structure is used for guiding the safety component to move between the first position area and the second position area along the lateral direction of the stapler body. 2 . The medical stapler according to claim 1 , wherein the lateral guide structure comprises a first guide member provided on the housing, and a second guide member provided on the safety component. 3 . The first guide member cooperates with the second guide member, so that the safety assembly moves along the lateral direction of the stapler body. 3 . The medical stapler according to claim 2 , wherein the first guide member and the second guide member are sliding grooves and sliders that cooperate with each other, and the sliding grooves fit along the anastomoses. 4 . the lateral extension of the device body, and the sliding block is arranged on the safety component. 4 . The medical stapler according to claim 3 , wherein a marking portion is provided on the safety mechanism, and a marking portion is provided on the housing for exposing the marking portion to observe the position of the safety mechanism. 5 . observation port. 5 . The medical stapler according to claim 4 , wherein the marking part comprises a first marking part arranged at intervals and a second marking part which is different from the first marking part; When the first position area, the first marking portion is exposed from the viewing port; when the safety mechanism is located in the second position area, the second marking portion is exposed from the viewing port. 6 . The medical stapler of claim 5 , wherein the first marking portion is red, and the second marking portion is green. 7 . 7. The medical stapler according to any one of claims 3-6, wherein the marking portion is provided on the slider. 8. The medical stapler of claim 1, wherein the first position area is closer to the axis of the stapler body than the second position area; the safety component has a base a locking part connected to the base to cooperate with the firing mechanism, when the safety component is located in the first position area, the locking part locks the firing mechanism, and the safety component is located in the first position area In the second position area, the locking portion unlocks the firing mechanism. 9 . The medical stapler according to claim 1 , wherein the firing mechanism comprises a nail push rod movably arranged in the casing, a firing handle pivotally connected to the casing, and the push button 9 . The staple rod can move along the axial direction of the stapler body; the second position area is closer to the axis of the stapler body than the first position area, and the safety component is located at the first position When the firing handle is in the second position area, the firing handle and the nail push rod cannot be linked, and when the safety component is located in the second position zone, the firing handle and the nail push rod can be linked. 10 . The medical stapler according to claim 9 , wherein the push rod and the firing handle are axially spaced apart and oppositely provided with a first connecting portion and a second connecting portion, and the first connecting portion is connected with the first connecting portion. 11 . A guide channel is formed between the second joint parts; when the safety component is located in the first position area, the safety component is not in the guide channel, and when the safety component is located in the second position area, the safety component is not located in the guide channel At least part of the structure of the assembly enters the guide channel to engage the push rod and the firing handle. 11. The medical stapler of claim 10, wherein the safety component has a base movably connected to the housing, and the slider is arranged on the base to guide the base The seat moves laterally along the stapler body. 12 . The medical stapler according to claim 11 , wherein the safety component further has a linking member matched with the base, and the linking member can move along the axial direction of the stapler body; 12 . During the movement of the anvil assembly in the proximal direction, the anvil assembly acts on the transmission member, and drives the base to move laterally through the transmission member, and the base pushes the linkage member to make the transmission member move. At least part of the structure of the linkage extends into the guide channel. 13 . The medical stapler according to claim 11 , wherein the transmission member has a resisting portion matched with the anvil assembly, and a transmission rod extending proximally from the resisting portion, so the The base cooperates with the inclined surface of the transmission rod to drive the base to move to the second position area. 14. The medical stapler according to claim 1, wherein the safety mechanism further comprises a reset mechanism, and the reset mechanism drives the safety component to move from the second position area to the first position area. 15. The medical stapler according to claim 1, wherein the medical stapler is a circumcision stapler, and the distal end of the anvil assembly is provided with a glans cavity for accommodating the glans.

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