CN209996394U

CN209996394U - Closing driving mechanism and medical anastomat comprising same

Info

Publication number: CN209996394U
Application number: CN201920473302.9U
Authority: CN
Inventors: 单腾
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-01-31
Anticipated expiration: 2029-04-09

Abstract

The utility model provides an kind of closed actuating mechanism and include its medical anastomat, closed actuating mechanism includes the activity handle, the slider, the holder, turn to the subassembly and closed driving piece, it connects between slider and closed driving piece to turn to the subassembly, be provided with the recess on the slider, under the initial condition, the slider is located the near-end side of holder, when gripping the activity handle, the activity handle promotes slider to the distal end side direction motion of anastomat, turn to the subassembly and convert the motion of slider to the distal end side direction of anastomat into the motion of closed driving piece to the near-end side direction of anastomat, the holder at least partially gets into in the recess of slider, in order to obstruct the motion of slider towards the near-end side of anastomat, through adopting the utility model discloses, the closed actuating mechanism's when closing position is injectd to the pin fin portion through the holder, closed to the distal end side direction motion of anastomat when avoiding the anastomat.

Description

Closing driving mechanism and medical anastomat comprising same

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to kinds of closed actuating mechanism reach medical anastomat including it.

Background

The digestive tract diseases are high-incidence diseases of human beings, and in the treatment process, a medical anastomat is often used for replacing the manual operation of a doctor to perform anastomosis on physiological tissues such as the digestive tract and the like, the medical anastomat is common surgical operation instruments, most of the medical anastomats adopt an axial internal stapling mode, end-to-end or end-to-side anastomosis is formed on the physiological tissues such as esophagus, stomach and intestinal tract during operation, two sections of tissues are contained in the medical anastomat in an astringing mode during anastomosis, a circular anastomotic stoma is formed on the tissues after the completion of percussion, and a human body channel is reconstructed.

In the prior art, the medical anastomat comprises a medical anastomat body, an operating handle movably connected with the medical anastomat body and a nail head matched with the medical anastomat body, wherein the nail head comprises a nail bin and a nail anvil which are arranged oppositely, the movable handle is firstly held during an operation, the closed pull piece of the nail head is pulled by a closed driving mechanism to move towards the near end side of the anastomat, so that the nail bin and the nail anvil are closed, the operating handle is held again, nails can be pushed to move towards tissues, and the tissues are anastomosed by forming of the anastomoses nails in the nail bin at the nail anvil component.

In the existing closing driving mechanism, the structure is complex, and in the process of firing the anastomat, the closing pull sheet may be displaced towards the direction of the far end side of the anastomat, so that the closing effect between the nail bin and the nail anvil is influenced, and the operation effect is adversely affected.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide kinds of closed actuating mechanism and including its medical anastomat, inject closed actuating mechanism's position when closing the pin fin portion through the holder, closed pulling-on piece is to the distal end side direction motion of anastomat when avoiding the anastomat percussion.

The embodiment of the utility model provides kinds of closed actuating mechanism for medical anastomat, closed actuating mechanism includes movable handle, slider, holder, turns to the subassembly and closed driving piece, turn to the subassembly connect in between slider and the closed driving piece, be provided with the recess on the slider, under the initial condition, the slider is located the proximal end side of holder, when gripping movable handle, movable handle promotes the distal end side direction motion of slider to the anastomat, turn to the subassembly with the motion of slider to the distal end side direction of anastomat converts the motion of closed driving piece to the proximal end side direction of anastomat, the holder at least part gets into in the recess of slider, with the motion of hindering the slider towards the proximal end side of anastomat.

Optionally, the steering assembly comprises a steering support beam and a pull rope, the steering support beam is positioned on the proximal end side of the th sliding block, the pull rope is sleeved outside the steering support beam, and the pull rope is connected between the th sliding block and the closing driving piece.

Optionally, the steering assembly comprises a steering support beam provided with a pulley, and the pull rope is provided on an outer surface of the pulley.

Optionally, the medical stapler includes a nail head and a closing pull-tab for closing the nail head, the closing driving member is sleeved outside the closing pull-tab, and the closing driving member is axially fixed to the closing pull-tab.

Optionally, the outside of the closing pull piece is further sleeved with an sleeve, the closing driving piece is sleeved outside the sleeve, a stroke groove extending along the axial direction of the anastomat is formed in the side face of the sleeve, a connecting pin is arranged in the closing driving piece and inserted into the stroke groove, and the connecting pin can move along the extending direction of the stroke groove.

Optionally, the proximal side of the closure drive is provided with biasing element that biases the closure drive in the direction of the distal side of the stapler.

Optionally, the movable handle is connected to link, when the movable handle is held, the distal side of the link pushes the th slider to move toward the distal side of the stapler.

Optionally, the closing drive mechanism further comprises an actuating rod, when the movable handle is held, the movable handle pushes the actuating rod to move towards the distal side of the anastomat, and the actuating rod presses the retaining piece downwards so that the retaining piece at least partially enters the groove of the th sliding block.

Optionally, the actuating rod is provided with a firing member on its distal side, and the firing member presses the holding member downward when moving in the distal direction of the stapler, so that the holding member enters at least partially into the recess of the th slider.

Optionally, the holder includes a second slider, and a protrusion is disposed on the side of the second slider, and enters the groove of the th slider when the movable handle is held.

Optionally, the holder further includes a third slider, and the third slider is provided with an accommodating groove for accommodating the second slider.

Optionally, a fifth inclined plane is arranged on the proximal end side of the third slider, an inclined table surface is arranged on the distal end side of the firing piece, and the fifth inclined plane and the inclined table surface are guided to each other.

Optionally, an th biasing member is disposed in the accommodating groove, and the th biasing member biases the second slider toward the lower side.

Optionally, a second biasing member is disposed below the third slider, and the second biasing member biases the third slider toward the upper direction.

Optionally, the side of the actuating lever is provided with a flange, and when the movable handle is held, the flange moves towards the distal side of the anastomat to be contacted with the top surface of the third slide block and presses the third slide block to drive the second slide block to move downwards.

Optionally, in a proximal side view of the stapler, the flange and the boss of the second slider block are located on both sides of the actuation rod, respectively.

Optionally, the distal side of the th slider is a th ramp, the th ramp is inclined upward from its distal side to its proximal side, and the proximal side of the tab is a second ramp that mates with the th ramp.

Optionally, the proximal side surface of the groove is a third inclined surface matched with the second inclined surface, and both the distal side surface of the groove and the distal side surface of the boss are perpendicular surfaces.

Optionally, the holding member includes resilient tab, the resilient tab includes a fixed end, a pressing portion and a movable end, the fixed end is fixed to the stapler, and the movable end enters the groove of the th sliding block when the actuating lever presses the pressing portion downward.

Optionally, the fixed end of the resilient tab is located at a distal end of the movable end, and the movable end is bent downward and toward a distal end of the stapler to form a fitting portion that fits the groove of the th slider.

Optionally, the distal side of the th slider is a th ramp, the th ramp is inclined upward from its distal side to its proximal side, and the proximal side of the mating portion is a fourth ramp that mates with the th ramp.

Optionally, the proximal side surface of the groove is a third inclined surface matched with the fourth inclined surface, the distal side surface of the groove is a vertical surface, and the movable end of the elastic piece is formed with a vertical surface matched with the distal side surface of the groove.

The embodiment of the utility model provides an kinds of medical anastomats still, including arbitrary item the closed actuating mechanism.

The utility model provides a closed actuating mechanism reaches medical anastomat including it has following advantage:

the utility model provides an kind are used for closed actuating mechanism of medical anastomat, inject closed actuating mechanism's position when closing the pin fin portion through the holder, closed pulling-on piece moves to the distal end side direction of anastomat when avoiding the anastomat percussion to guarantee the closed stability of pin fin portion among the anastomat percussion process, promote the operation effect.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic illustration of a closure drive mechanism of an embodiment of the present invention engaged with a housing;

FIG. 2 is a schematic illustration of a closure actuation mechanism according to embodiment of the present invention in cooperation with other components of a stapler;

FIG. 3 is a perspective view of a closure actuation mechanism of embodiment of the present invention in cooperation with other components of a stapler;

fig. 4 is a schematic structural view of a closing drive mechanism according to an embodiment of the present invention;

fig. 5 is a schematic view of an embodiment of the present invention showing the distal side of the closure drive mechanism;

FIG. 6 is a schematic view of the slider and retainer of an embodiment of the present invention at ;

fig. 7 is a schematic structural view of a holder according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a sliding block according to an embodiment of the present invention at ;

fig. 9 is a rear view of an actuator lever of an embodiment of the present invention;

figure 10 is a schematic view of a second embodiment of the closure drive mechanism of the present invention engaged with a housing;

FIG. 11 is a perspective view of a second embodiment closure actuation mechanism of the present invention in cooperation with other components of a stapler;

fig. 12 is a schematic structural view of a closure drive mechanism according to a second embodiment of the present invention;

fig. 13 is a schematic view of the holder of the second embodiment of the present invention engaged with an th slider.

Reference numerals:

1 compression spring of stapler body 61

11 second pressure spring for fixing handle 62

12 casing 7 spring plate

121 travel slot 71 fixed end

13 pull tab 72 pressing part

2 casing 73 pull rope passing groove

3 fourth inclined plane of movable handle 74

31 jaw 75 loose end

4 sixth incline of connecting rod 76

51 st slide block 8 actuating lever

511 st th notch 81 pushing tooth

512 second groove 82 rack

513 th slope 83 firing element

514 third inclined plane 831 inclined table surface

52 second slide 84 flange

521 boss 841 flange bevel

522 second inclined plane 91 pull rope

53 third slider 92 pulley

531 closing the container 93

532 top surface 94 third compression spring

535 fifth inclined plane 95 connecting pin

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

In order to solve the technical problems of the prior art, the present invention provides closure driving mechanisms for a medical stapler and a medical stapler including the staple cartridge, wherein the stapler includes a staple head and a stapler body, a closure pull tab for closing the staple head is provided in the stapler body, the closure driving mechanism is used for the medical stapler, the closure driving mechanism includes a movable handle, a slider, a holder, a steering assembly and a closure driving member, the steering assembly is connected between the slider and the closure driving member, a groove is provided on the slider, in an initial state, the slider is located at a proximal side of the holder, when the movable handle is held, the movable handle pushes the slider to move in a distal side direction of the stapler, the steering assembly converts a movement of the slider in a distal side direction of the stapler into a movement of the closure driving member in a proximal side direction of the stapler, the closure driving member pulls the closure driving member to move in a proximal side direction of the stapler, so that the staple head portion of the staple holding slider can be fired into the groove , and the distal slider can be fired again by a person holding the staple slider to check that the staple cartridge can be fired to the proximal side of the stapler body, and the staple cartridge can be fired again when the staple cartridge .

The structure of the closing driving mechanism and the medical stapler according to the embodiment of the present invention will be described with reference to fig. 1 to 13, wherein fig. 1 to 9 show the structure of the closing driving mechanism and the medical stapler according to the embodiment of the present invention, and fig. 10 to 13 show the structure of the closing driving mechanism and the medical stapler according to the second embodiment of the present invention, wherein the structures of the holding member according to the embodiment are different from those according to the second embodiment.

In an embodiment of the present invention according to , as shown in fig. 1 to 9, the stapler comprises a stapler body 1 and a staple head (not shown) at a distal side of the stapler body 1, the stapler body 1 comprises a housing 2 and a stationary handle 11, the stapler body 1 is further provided inside with a closing pull-tab 13 for closing and opening the staple head, the closing pull-tab 13 is externally sheathed with a sleeve 12, the closing drive mechanism comprises a movable handle 3 rotatably connected to the stapler body 1, a first slider 51 located inside the stapler body 1, a holder, a steering assembly, a firing member 83 and a closing drive member 93 connected to the closing pull-tab 13, the steering assembly is connected between the first slider 51 and the closing drive member 93, the first slider 8651 groove 511 is provided on the first slider 8651, the first slider 51 is located at a proximal side of the holder in an initial state, the movable slider 3 pushes the first slider slider 51 towards a distal side of the stapler, the proximal slider is provided to prevent the distal side closing slider 3851 from moving towards a proximal side of the proximal end of the stapler body, the proximal end of the staple head 9, the proximal end of the staple head is provided with a closing pull-holding slider , the proximal end of the movable slider 3813, the movable slider is not to prevent the proximal end of the staple head moving towards the proximal end of the staple cartridge 3851, the proximal end of the staple cartridge from moving towards the proximal end of the.

For example, in the perspective of FIG. 1, the distal side of the stapler body 1 is the end on the left side of the figure, and the right end of the stapler body 1 is the end on the right side of the figure.

In this embodiment, the steering assembly includes a steering support beam 92 and a pull rope 91, the steering support beam 92 is fixedly disposed on the housing 2, in the preferred embodiment, the steering support beam 92 is provided as a pulley 92 to reduce the resistance of the pull rope 91 when moving, the pulley 92 is disposed on the proximal end side of the sliding block 51, the pull rope 91 is disposed outside the pulley 92, and the pull rope 91 is connected between the sliding block 51 and the closing driving member 93, in the preferred embodiment, both ends of the pull rope 91 are respectively provided with a fixed end, the proximal end side of the sliding block 51 may be provided with a second groove 512, the fixed end of the pull rope 91 is detachably mounted in the second groove 387512, the other fixed end of the pull rope 91 is detachably connected to the closing driving member 93, and the movement of the sliding block 51 may be converted into a reverse driving force to the closing driving member 93 by the structure of the pull rope 91 and the pulley 92, so that the closing driving member 93 moves toward the proximal end.

In this embodiment, the closing driving member 93 is sleeves sleeved outside the closing pull tab 13, and the closing driving member 93 is axially fixed to the closing pull tab 13, where axial fixation means that there is no relative movement between the closing driving member 93 and the closing pull tab 13 along the axial direction of the stapler, if the closing driving member 93 moves axially toward the proximal side or the distal side of the stapler, the closing pull tab 13 is linked with the closing driving member 93, step , the closing driving member 93 is sleeved outside the sleeves 12, the side surface of the sleeves 12 is provided with a stroke groove 121 extending along the axial direction of the stapler, the closing driving member 93 is provided with a connecting pin 95 therein, the connecting pin 95 is inserted into the stroke groove 121, and the connecting pin 95 is movable along the extending direction of the stroke groove 121, the stroke groove 121 communicates the inner side surface and the outer side surface of the sleeves 12, and the connecting pin 95 is through pins, the closing driving member 93 is fixedly connected to the closing pull tab 13 by the connecting pin 95, and the axial movement of the connecting pin 95 in the stroke groove 12 of the sleeves 12 provides a guiding function for the axial movement of the closing driving member 93 along the closing pull tab 13, and the axial direction of the closing pull tab 93 is rotated around the axis.

The proximal side of the closure driver 93 is provided with a biasing member which biases the closure driver 93 in a direction towards the distal side of the stapler, in this embodiment the biasing member is a third compression spring 94. when the movable handle 3 is gripped to close the head of the staple, the closure driver 93 moves towards the proximal side of the staple to compress the third compression spring 94. when the staple is reset after firing is completed, the deforming restoring force of the third compression spring 94 can urge the closure driver 93 to move towards the distal side of the staple to return to the initial position and can open the head of the staple.

In this embodiment, the movable handle 3 is connected to connecting rod 4, and when the movable handle 3 is held, the distal end side of the connecting rod 4 pushes the th sliding block 51 to move toward the distal end side of the stapler.

As shown in FIG. 2, the closure drive mechanism further includes an actuating rod 8 for firing the stapler, the actuating rod 8 is provided with pushing teeth 81 on a distal side thereof, a rack 82 on a proximal side thereof is provided, a distal side of the pushing teeth 81 is movably connected to a firing member 83, the firing member 83 is rotatable 360 DEG relative to the rest of the actuating rod 8, the firing member 83 is sleeved on and fixedly connected to the sleeve 12, a sloped table 831 is circumferentially provided on a distal side of the firing member 83, jaws 31 are further provided on the movable handle 3. upon grasping the movable handle 3 at , the jaws 31 of the movable handle 3 push the pushing teeth 81 of the actuating rod 8 to move the actuating rod 8 in a direction toward the distal side of the stapler, the sloped table 831 of the firing member 83 gradually approaches and contacts the jaw retainer and presses the jaw retainer downward to cause the jaw retainer to enter at least partially into the

recess

511, 31 of the slider 51 at the time corresponding to the rack 82, to switch to a mode, and grasp the jaw retainer 82 again to push the actuating rod 8 to further fire the distal side of the actuating rod 8 to fire the stapling member, thereby pushing the distal end of the stapling rod 8 to continue the stapling motion.

As shown in fig. 4 to 7, in this embodiment, the retaining member includes a second slider 52, a boss 521 is disposed on an side of the second slider 52, when the movable handle 3 is held, the firing member moves to a distal side to be above the retaining member to press the retaining member downward, and at the same time, the second slider 51 moves to a distal side, at least a portion of the boss 521 is below the boss 521, so that the boss 521 enters the groove 511 of the second 1 of the second slider 51, and steps, the retaining member further includes a third slider 53, the third slider 53 defines a receiving groove 531 for receiving the second slider 52, a second biasing member is disposed in the receiving groove 531, a biasing member 894 biases the second slider 52 5 downward, a second biasing member is disposed below the third slider 53, the second biasing member biases the third slider 53 with a biasing force upward, in this embodiment, the second biasing member is a second slider 366 biasing force, the second biasing member is a second biasing member 638 biasing member, and the second biasing member is disposed in the second stabilizing hole , and the second biasing member is disposed near the second stabilizing hole , and the second biasing member 638 is disposed near the second stabilizing hole .

As shown in FIGS. 6 and 7, the projection 521 is illustrated as entering the recess 511 of the . in the case of the th grasping of the movable handle 3, the actuating rod 8 and the 0 slider 51 both move in the direction of the distal end of the stapler, the recess 511 of the of the 1 slider 51 moves below the projection 521. the firing rod 83 presses the third slider 53 downward and presses the second compression spring 62, the third slider 53 moves downward, the compression spring is compressed when the slider 51 lifts the second slider 52 upward, the projection 521 of the second slider 52 moves downward into the recess 511 of the , the second slider 52 is held in the recess 511 of the by the compression spring 61 after the firing of the stapler is completed, the actuating rod 8 moves back to the initial position to the side of the stapler, the third slider 53 is pressed by the firing member 83, the third slider 53 and the second slider 52 and the second slider 61 return to the initial position by the proximal end of the second compression spring and the second slider 61, and the third slider 53 returns to the initial position by the proximal end of the proximal compression spring 93 by the proximal end of the third compression spring when the stapler is reset after the firing of the stapler is completed, and the third slider 53 is moved back to the proximal end of the stapler by the proximal end of the driving member 93 by the proximal compression spring.

In this embodiment, the side of the actuating lever 8 may further be provided with a flange 84 at , and when the movable handle 3 is held, the flange 84 moves toward the distal side of the stapler to contact the top surface 532 of the third slider 53 and press the third slider 53 downward such that the projection 521 of the second slider 52 enters the groove 511 of the slider 51. the flange 84 presses the third slider 53 and the above-described firing member 83 against the third slider 53 may be two alternative embodiments. in the proximal side view of the stapler, the flange 84 and the projection 521 of the second slider 52 are respectively located on both sides of the actuating lever 8. in fig. 3, the flange 84 is located on the right side of the actuating lever 8 in the view seen in the axial direction from the right end surface, and the projection 521 is located on the left side of the actuating lever 8. in fig. 9, the lower end surface of the flange 84 is also provided with a flange inclined surface 841 cooperating with the fifth inclined surface 535 to guide the third slider 53 to each other.

In this embodiment, the distal side of the th slider 51 is the th ramp 513, the th ramp 513 is inclined upward from its distal side to its proximal side, and the proximal side of the 521 is the second ramp 522 that mates with the th ramp 513. the mating of the th ramp 513 and the second ramp 522 better guides the 521 into the th slider 51.

In this embodiment, the proximal side of the -th groove 511 is a third inclined surface 514 engaged with the second inclined surface 522, and the distal side of the -th groove 511 and the distal side of the tab 521 are both vertical surfaces, i.e., the -th groove 511 is a structure adapted to the shape of the tab 521. furthermore, by the engagement of the two vertical surfaces, the distal side of the -th groove 511 and the distal side of the tab 521, the tab 521 is prevented from being disengaged from the distal side of the -th slider 51 when the tab 521 is located in the -th groove 511.

As shown in FIGS. 10-13, the second embodiment of the present invention is a schematic structural view of a closing driving mechanism and a stapler, which is different from the embodiment, in that the structure of the holding member is different, in this embodiment, the holding member includes elastic sheet 7, the elastic sheet 7 includes a fixed end 71, a pressing portion 72 and a movable end 75, the fixed end 71 is fixed to the stapler, when time the movable handle 3 is held, the firing member 83 moves to the distal side direction of the stapler, the firing member 83 presses the pressing portion 72 downwards, the movable end 75 moves downwards to enter the th groove 511 of the th slider 51, the elastic sheet 7 deforms to block the movement of the th slider 51 to the proximal side direction of the stapler, after the stapler is fired, the firing member 8 moves to the proximal side of the stapler to return to the initial position, and the pressing portion 72 is no longer pressed by the pressing portion 72, the movable end 75 moves upwards to separate from the th groove 511, and the can move to the proximal side of the stapler to return to the initial position.

The matching position of the elastic sheet 7 and the pull rope 91 is also provided with a pull rope passing groove 73, and the pull rope 91 can pass through the pull rope passing groove 73 and axially move in the pull rope passing groove 73.

In this embodiment, the fixed end 71 of the resilient tab 7 is located at the distal side of the movable end 75, the movable end 75 is bent downward and toward the distal side of the stapler to form a mating portion that mates with the th notch 511 of the th slider 51. the distal side of the th slider 51 is the th ramp 513, the th ramp 513 is inclined upward from the distal side to the proximal side, the proximal side of the mating portion is the fourth ramp 74 that mates with the th ramp 513. the mating of the th ramp 513 and the fourth ramp 74 better guides the mating portion of the resilient tab 7 into the th notch 511. the sixth ramp 76 is also formed at the proximal side of the resilient tab 7 in correspondence with the ramp 831 of the firing member 83. this embodiment can also mate with the flange 84 shown in FIG. 9, i.e., the flange 841 and the sixth ramp 76 are guided.

In this embodiment, the proximal side of the -th notch 511 is a third inclined surface which is matched with the fourth inclined surface 74, the distal side of the -th notch 511 is a vertical surface, and the movable end 74 of the resilient tab 7 is formed with a vertical surface which is matched with the distal side of the -th notch 511. by matching the two vertical surfaces, i.e., the movable end 74 of the resilient tab 7 and the distal side of the -th notch 511, the movable end 74 can be prevented from being detached from the distal side of the -th notch 511 when the movable end 74 enters the -th notch 511.

It will be apparent to those skilled in the art that a number of simple inferences or substitutions can be made without departing from the spirit and scope of the invention and these should be construed as within the scope of the invention.

Claims

closure driving mechanism, used in medical stapler, comprising a movable handle, sliding block, a holding member, a steering component and a closure driving member, wherein the steering component is connected between the sliding block and the closure driving member, the sliding block is provided with a groove, and in initial state, the sliding block is located at the proximal side of the holding member;

when the movable handle is held, the movable handle pushes the th sliding block to move towards the far end side of the anastomat, the steering component converts the movement of the th sliding block towards the far end side of the anastomat into the movement of the closing driving piece towards the near end side of the anastomat, and the retaining piece at least partially enters the groove of the th sliding block to block the movement of the th sliding block towards the near end side of the anastomat.
2. The closure drive mechanism of claim 1, wherein the steering assembly includes a steering support beam located on a proximal side of the th slider and a pull cord that is sleeved on an outer portion of the steering support beam and that is connected between the th slider and the closure drive member.
3. A closure drive mechanism according to claim 2, wherein the steering assembly comprises a steering support beam provided with a pulley, the pull cord being provided on an outer surface of the pulley.
4. The closure driving mechanism according to claim 1, wherein the medical stapler comprises a nail head and a closure pull tab for closing the nail head, the closure driving member is sleeved outside the closure pull tab, and the closure driving member is axially fixed with the closure pull tab.
5. The closure driving mechanism as claimed in claim 4, wherein an sleeve is further sleeved on an outer portion of the closure pull tab, the closure driving member is sleeved on an outer portion of the sleeve, a stroke slot extending along an axial direction of the stapler is formed on a side surface of the sleeve, a connecting pin is disposed in the closure driving member, the connecting pin is inserted into the stroke slot, and the connecting pin is movable along an extending direction of the stroke slot.
6. The closure drive mechanism of claim 1, wherein a proximal side of the closure drive is provided with biasing elements that bias the closure drive in a direction toward a distal side of the stapler.
7. The closure driving mechanism as claimed in claim 1, wherein said movable handle is connected to link, when said movable handle is held, the distal side of said link pushes said th slider to move toward the distal side of said stapler.
8. The closure drive mechanism according to claim 1, further comprising an actuation lever, wherein when the actuation lever is grasped, the actuation lever pushes the actuation lever in a direction toward the distal side of the stapler, the actuation lever pressing the retainer downward such that the retainer at least partially enters the recess of the th slider.
9. The closure drive mechanism of claim 8, wherein the distal side of the actuation rod is provided with a firing member that, upon movement in a distal direction of the stapler, forces the retention member downward such that the retention member at least partially enters the recess of the th slider.
10. The closure drive mechanism of claim 8, wherein the retainer comprises a second slider having a protrusion disposed on side , the protrusion entering a recess of the th slider when the movable handle is grasped.
11. The closure drive mechanism of claim 10, wherein the retainer further comprises a third slider defining a receiving channel for receiving the second slider.
12. The closure drive mechanism of claim 11, wherein the actuation rod includes a firing member disposed on a distal side thereof, the firing member, when moved in a distal direction of the stapler, downwardly urges the retention member such that the retention member at least partially enters the recess of the th slider block, the third slider block includes a fifth ramp disposed on a proximal side thereof, the firing member includes a ramp surface disposed on a distal side thereof, and the fifth ramp and the ramp surface are oriented with respect to each other.
13. The closure drive mechanism of claim 11, wherein the receiving slot has an -th biasing element disposed therein, the -th biasing element biasing the second slider downwardly.
14. The closure drive mechanism of claim 11, wherein a second biasing member is disposed below the third slider and biases the third slider upward.
15. The closure drive mechanism according to claim 11, wherein the side of the actuation lever is provided with a flange that moves toward the distal side of the stapler to contact the top surface of the third slider and force the third slider to move downward when the movable handle is grasped.
16. The closure drive mechanism according to claim 15, wherein the flange and the boss of the second slider block are located on either side of the actuation rod in a proximal side view of the stapler.
17. The closure drive mechanism of claim 10, wherein the distal side of the slider is a ramp, the ramp is sloped upward from its distal side to its proximal side, and the proximal side of the tab is a second ramp that mates with the ramp.
18. The closure drive mechanism of claim 17, wherein the proximal side of the recess is a third ramp that mates with the second ramp, and wherein the distal side of the recess and the distal side of the boss are both vertical surfaces.
19. The closure actuation mechanism of claim 9, wherein the retaining member comprises an leaf spring, the leaf spring comprising a fixed end secured to the stapler, a pressing portion, and a movable end that enters the groove of the slider when the actuating lever presses the pressing portion downward.
20. The closure actuating mechanism of claim 19, wherein the fixed end of the resilient tab is located at a distal end of the movable end, and the movable end is bent downward and toward a distal end of the stapler to form a fitting portion that fits into the recess of the -th slider.
21. The closure drive mechanism of claim 20, wherein a distal side of the slider is a ramp, the ramp is sloped upward from its distal side to a proximal side, and a proximal side of the engagement portion is a fourth ramp that mates with the ramp.
22. The closure actuating mechanism of claim 21, wherein a proximal side of the recess is a third inclined surface that mates with the fourth inclined surface, a distal side of the recess is a vertical surface, and the movable end of the resilient tab is formed with a vertical surface that mates with the distal side of the recess.
23, A medical stapler, comprising a closure driving mechanism according to any of claims 1 to 22.