CN210990510U

CN210990510U - Closing driving mechanism and medical anastomat comprising same

Info

Publication number: CN210990510U
Application number: CN201921425066.XU
Authority: CN
Inventors: 单腾
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Touchstone International Medical Science Co Ltd; Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-07-14
Anticipated expiration: 2029-08-29

Abstract

The utility model provides a closed actuating mechanism reaches medical anastomat including it, closed actuating mechanism includes first slider, holding member, closed driving piece and ejector pad, and first slider is connected with the closed driving piece, and first slider includes first gomphosis portion, and the holding member lifts the portion including the second gomphosis portion that is connected and first, and the ejector pad lifts the portion including the second that is located first portion below that lifts. When the nail head of the anastomat is closed, the first embedding part of the first sliding block is positioned below the second embedding part of the holding piece, the first embedding part is embedded with the second embedding part, the closing driving piece is kept at the closing position under the action of the holding piece, after the anastomat is fired, the pushing block is lifted upwards, the second lifting part of the pushing block lifts the first lifting part of the holding piece upwards, the second embedding part lifts upwards to be separated from the first embedding part, and the closing driving piece loses the holding effect of the holding piece and can move towards the far end side, so that the nail head is opened.

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 closed actuating mechanism reaches medical anastomat including it.

Background

Digestive tract diseases are one of the high-incidence diseases of human beings, and in the treatment process, a medical anastomat is often used for performing anastomosis on physiological tissues such as the digestive tract and the like instead of manual operation of a doctor. The medical anastomat is a common surgical operation instrument, an axial internal stapling mode is mostly adopted, physiological tissues such as esophagus, stomach and intestinal tract are anastomosed end to end or end to side in an operation, two sections of tissues are contained in the medical anastomat in an inwards converging mode in an anastomosing process, a circular anastomotic stoma is formed on the tissues after the completion of the anastomosis, and a human body channel is rebuilt.

In the prior art, a medical stapler includes a medical stapler body, an operating handle movably connected to the medical stapler body, and a staple head portion engaged with the medical stapler body. The nail head comprises a nail bin and a nail anvil which are oppositely arranged. During operation, the movable handle is held firstly, the closing pull piece of the nail head part is pulled by the closing driving mechanism to move towards the near end side of the anastomat, so that after the nail bin and the nail anvil are closed, the operating handle is held again, the anastomosis nails can be pushed to move towards tissues, the tissues are anastomosed by forming the anastomosis nails in the nail bin at the nail anvil assembly, and meanwhile, the cutter moves from the near end side to the far end side of the anastomat to cut the tissues. The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side.

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. In addition, in the existing closing driving mechanism, after the stapler is fired, the nail bin and the nail anvil are still closed, after a doctor operates the stapler, the doctor needs to pull back the push cutter rod, so that the cutter returns to the initial position along the cutter groove, and in the process of pulling back the cutter, if the nail bin and the nail anvil are still closed, the cutter can be subjected to the resistance of the tissue between the nail bin and the nail anvil and cannot smoothly return to the initial position.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a closed actuating mechanism reaches medical anastomat including it, the gomphosis through keeper and first slider is injectd the position of closed driving piece when the pin fin is closed to after the anastomat percussion is accomplished, make the keeper break away from with first slider through the lifting effect of ejector pad, closed driving piece can move in order to open the pin fin.

The embodiment of the utility model provides a closed driving mechanism for medical anastomat, closed driving mechanism includes first slider, keeper, closed driving piece and ejector pad, first slider with closed driving piece is connected, first slider includes first gomphosis portion, the keeper includes second gomphosis portion and the first portion of lifting that is connected, the ejector pad includes the second portion of lifting that is located first portion of lifting;

when the nail head of the anastomat is closed, the first embedding part of the first sliding block is positioned below the second embedding part of the holding piece, the first embedding part is embedded with the second embedding part, when the pushing block is lifted upwards in the state, the second lifting part of the pushing block lifts the first lifting part of the holding piece upwards, and the second embedding part lifts upwards to be separated from the first embedding part.

Optionally, in the initial state, the second lifting portion of the push block is not in contact with the first lifting portion of the holder.

Optionally, the initial position of the first fitting portion is located on a proximal end side of the second fitting portion, the closure drive mechanism further includes a movable handle and a pressing piece, and the initial position of the pressing piece is located on a proximal end side of the holder;

when the movable handle is held in an initial state, the first sliding block moves towards the far end side direction of the anastomat, so that the first embedding part moves to the position below the second embedding part, the pressing piece moves towards the far end side direction of the anastomat and presses the holding piece downwards, so that the second embedding part moves downwards to be embedded with the first embedding part, and the first sliding block drives the closing driving piece to move towards the near end side of the anastomat to close the nail head.

Optionally, the closing driving mechanism further includes an actuating lever, the pressing member is disposed at a distal end side of the actuating lever, and the movable handle drives the actuating lever to move toward the distal end side of the stapler when the movable handle is gripped in an initial state.

Optionally, the holder includes a second slider and a third slider, the second slider includes the second engaging portion and the first lifting portion, and when the movable handle is held in the initial state, the pressing member presses the third slider downward, so that the third slider drives the second slider to move downward.

Optionally, a first biasing member is disposed between the second slider and the third slider, and the first biasing member provides a downward biasing force to the second slider;

when the push block is lifted upward in a state where the first fitting portion and the second fitting portion are fitted, the second slider moves upward relative to the third slider, and the first biasing member is deformed.

Optionally, when the nail head of the stapler is closed, the second lifting part of the push block is not in contact with the first lifting part of the second slide block; or the like, or, alternatively,

when the nail head of the anastomat is closed, the second lifting part of the push block is in contact with the first lifting part of the holding piece, but the acting force of the second lifting part on the second slide block is not enough to drive the first biasing piece to deform.

Optionally, an accommodating groove is formed in the third slider, and the second slider is disposed in the accommodating groove.

Optionally, a second biasing member is arranged between the pushing block and the housing of the anastomat, and the second biasing member provides a downward biasing force for the pushing block;

when the push block is lifted upwards, the second biasing piece deforms.

Optionally, a third biasing member is disposed on a proximal side of the closure drive member, the third biasing member biasing the closure drive member in a direction toward a distal side of the stapler.

Optionally, the pushing block further comprises an operating part, and a first side of the operating part of the pushing block protrudes out of the outer side of the housing of the anastomat.

Optionally, the second lifting portion of the pushing block is a lifting arm protruding from the second side of the operating portion.

Optionally, a fourth biasing member is disposed between the retainer and the housing of the stapler, the fourth biasing member biasing the retainer in an upward direction.

Optionally, the first embedding part is a boss, and the second embedding part is a groove; or

The first embedding part is a groove, and the second embedding part is a boss.

The embodiment of the utility model provides a medical anastomat is still provided, include closed actuating mechanism.

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

the utility model provides a closed actuating mechanism for medical anastomat, before the anastomat percussion, after through closed driving piece pulling pin head closure, the gomphosis through keeper and first slider is injectd the position of closed driving piece, closed pulling-on piece is to the distal end side direction motion of anastomat when avoiding the anastomat percussion, and after the anastomat percussion is accomplished, when needing to open the pin head, upwards lift the ejector pad, make keeper and first slider break away from through the lifting effect of ejector pad, and no longer restrict the position of closed driving piece, initial position can be returned to the closed driving piece, thereby make nail storehouse and nail anvil can open, can very smoothly pull back the cutter.

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 partial structural schematic view of an anastomat in an initial state according to a first embodiment of the invention;

FIG. 2 is a schematic view of the stapler of FIG. 1 with the stapler housing removed;

fig. 3 is a schematic position diagram of the first slider and the holder in the initial state according to the first embodiment of the present invention;

fig. 4 is a perspective view of the first slider and the holder in an initial state according to the first embodiment of the present invention;

fig. 5 is a schematic structural view of the matching between the retainer and the push block in the initial state according to the first embodiment of the present invention;

FIG. 6 is a schematic view of a partial structure of the stapler with the closed staple head according to the first embodiment of the present invention;

fig. 7 is a schematic structural view of the holder of the first slider when the nail head of the first embodiment of the present invention is closed;

FIG. 8 is a perspective view of the closure drive mechanism with the head closed according to the first embodiment of the present invention;

FIG. 9 is a schematic view of the retainer with the head closed according to the first embodiment of the present invention;

FIG. 10 is a schematic view of the structure of the retaining member engaged with the pushing block and the first sliding block when the head of the nail of the first embodiment of the present invention is closed;

FIG. 11 is a schematic structural view of the pushing block when the nail head of the first embodiment of the present invention is closed;

fig. 12 is a perspective view showing the engagement of the holder and the first slide block when the push block according to the first embodiment of the present invention is lifted;

fig. 13 is a schematic structural view illustrating the cooperation of the retainer and the first slider when the push block is lifted according to the first embodiment of the present invention.

Reference numerals:

1 stapler body 51 first recess

11 second groove of fixed handle 52

12 pull tab 53 first slider first ramp

13 housing 54 first slide second incline

2 actuating lever 55 first stop surface

21 pushing teeth 6 second slide block

22 rack 61 boss

23 flange 62 boss ramp

24 flange first ramp 63 second stop surface

25 firing member 64 first lift

3 movable handle 7 third slide block

31 claw 71 containing groove

32 link 72 third slide first incline

4 pushing block 74 first pressure spring

41 second pressure spring of second lifting part 75

42 operation part 81 pull cord

43 third compression spring 82 steering support beam

44 first guide 83 closure drive

5 first slide 84 third compression spring

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 problem in the prior art, the utility model provides a medical anastomat that is used for the closed actuating mechanism of medical anastomat and includes this nail storehouse. The anastomat comprises a nail head and an anastomat body, wherein a closing pull piece used for closing the nail head is arranged in the anastomat body. The closing driving mechanism is used for the medical anastomat and comprises a first sliding block, a retaining piece, a closing driving piece and a pushing block, wherein the closing driving piece is connected with the closing pulling piece and can drive the nail head to be opened and closed. In particular, it is defined that the closure drive has a closed position, in which the head is closed, and an open position, in which the head is open. The first sliding block is connected with the closed driving piece, the first sliding block comprises a first embedding part, the retaining piece comprises a second embedding part and a first lifting part which are connected, and the pushing block comprises a second lifting part located below the first lifting part.

When the nail head of the anastomat is closed, the first embedding part of the first sliding block is positioned below the second embedding part of the holding piece, the first embedding part is embedded with the second embedding part, the closing driving piece is kept at the closing position under the action of the holding piece, and the nail head is kept in the closing state and cannot be opened accidentally. After the anastomat is fired, when the nail head needs to be opened, an operator upwards lifts the push block, the second lifting portion of the push block upwards lifts the first lifting portion of the retaining piece, the first lifting portion drives the second embedding portion connected with the first lifting portion to upwards lift and separate from the first embedding portion, therefore, the retaining piece does not limit the position of the first sliding block any more, the position of the closing driving piece connected with the first sliding block cannot be limited, the closing driving piece loses the retaining effect of the retaining piece and can move to the opening position, the nail head is opened, and the cutter can be pulled back very smoothly.

The structure of the closing driving mechanism and the stapler according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 13.

As shown in fig. 1-5, in the first embodiment of the present invention, the anastomat includes anastomat body 1 and the nail head (not shown in the figure) that is located the distal end side of anastomat body 1, anastomat body 1 includes casing 13 and fixed handle 11, the inside of anastomat body 1 still is provided with the closed pulling-on piece 12 that is used for closed nail head and opens the nail head, closed pulling-on piece 12 is when initial condition, the nail head is opened, when closed pulling-on piece 12 moves to the anastomat near-end side, the nail head is closed, when closed pulling-on piece 12 moves to the anastomat distal end side again, the nail head can be reopened. The closing driving mechanism comprises a first sliding block 5, a retaining piece, a closing driving piece 83 and a pushing block 4, the first sliding block 5 is connected with the closing driving piece 83, the first sliding block 5 comprises a first embedding part, the retaining piece comprises a second embedding part and a first lifting part 64 which are connected, and the pushing block 4 comprises a second lifting part 41 which is positioned below the first lifting part 64.

In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator and the proximal side refers to the end closer to the operator. For example, in the perspective views of fig. 1 and 2, the distal end side of the stapler body 1 is the left end in the drawing, the right end side of the stapler body 1 is the right end in the drawing, the distal end side of the actuating lever 2 is the left end in the drawing, and the proximal end side of the actuating lever 2 is the right end in the drawing. Further, in the present invention, the upward and upward directions refer to the side facing away from the rack 22 for the actuating lever 2, and the downward and downward directions are opposite thereto, for example, in the perspective of fig. 2, the upward direction refers to the upper end in the figure.

In this embodiment, the first fitting portion of the first slider 5 is a first groove 51, and the second fitting portion of the holder is a boss 61. In other alternative embodiments, the first engaging portion may be a boss, and the second engaging portion may be a groove. The following description will be given taking as an example the configuration of the first fitting portion and the second fitting portion of this embodiment.

As shown in fig. 3 and 4, in this embodiment, the holder includes a second slider 6 and a third slider 7, a receiving groove 71 is disposed inside the third slider 7, and the second slider 6 is disposed in the receiving groove 71. The second slider 6 includes the boss 61 and the first raised portion 64. A first biasing member is arranged between the second slider 6 and the third slider 7, and the first biasing member provides a downward biasing force to the second slider 6. The third slider 7 and the housing of the stapler are directly provided with a fourth biasing member, and the fourth biasing member biases the third slider 7 upward. In this embodiment, the first biasing member is a first compressed spring 74 disposed between the inner wall of the accommodating groove 71 and the second slider 6, and the fourth biasing member is a second compressed spring 75 disposed at the bottom of the third slider 7. However, the present invention is not limited thereto, and in other alternative embodiments, the first biasing member and the fourth biasing member may also adopt other elastic structures such as a tension spring and a metal spring.

As shown in fig. 5, the push block 4 further includes an operating portion 42, and the second lifting portion 41 of the push block 4 is a lifting arm protruding from a second side of the operating portion 42. The first side of the operating part 42 of the push block 4 protrudes outside the housing of the stapler, so that the surgeon can directly operate the operating part 42 of the push block 4 outside the instrument. A second biasing member is arranged between the pushing block 4 and the housing of the anastomat, and the second biasing member provides a downward biasing force for the pushing block 4. In this embodiment, the second biasing member is a third compression spring 43 disposed above the pushing block 4. However, the present invention is not limited thereto, and in other alternative embodiments, the second biasing member may also adopt other elastic structures such as a compressed spring, a metal spring, etc. As shown in fig. 10 and 11, the pushing block 4 is provided with a first guiding portion 44, and the housing 13 (the housing 13 is shown in fig. 1) is provided with a second guiding portion (not shown) in a matching manner, and the first guiding portion 44 and the second guiding portion are of a boss and groove structure, and the pushing block 4 is arranged along the direction of the third pressing spring 43. That is, as shown in fig. 10, the push block 4 can move in the direction a or the direction opposite to the direction a in the drawing due to the guiding action of the first guide portion 44 and the second guide portion. The bottom of the push block 4, that is, the side away from the third compression spring 43, abuts against the housing 13, so that the push block 4 is not separated from the housing.

Further, a third biasing member is provided on the proximal side of the closure drive 83, which third biasing member biases the closure drive 83 in the direction of the distal side of the stapler. In this embodiment, the third biasing member is a third compression spring 84 disposed at the proximal end side of the closing driving member 83, and in other alternative embodiments, the third biasing member may also adopt other elastic structures such as a tension spring, a metal spring, and the like.

The first slider 5 is connected to the closing drive 83 via a steering assembly. The steering assembly comprises a steering support beam 82 and a pull rope 81, the steering support beam 82 is fixedly arranged on the shell 13, and the steering support beam 82 is preferably provided with a pulley so as to reduce resistance when the pull rope 81 moves. The pulley 82 is located at a proximal end side of the first slider 5, the pulling rope 81 is sleeved outside the pulley 82, and the pulling rope 81 is connected between the first slider 5 and the closing driving member 83. Preferably, both ends of the pulling rope 81 are respectively provided with a fixing end. The proximal end side of the first slider 5 may be provided with a second recess 52, and a fixed end of the pulling rope 81 is detachably mounted in the second recess 52. The other fixed end of the pulling rope 81 is detachably connected to the closing actuator 83. By the configuration of the rope 81 and the pulley 82, the movement of the first slider 5 can be converted into a reverse driving force to be transmitted to the closing driving member 83.

In this embodiment, the closure drive mechanism further comprises a movable handle 3 and a pressing piece, which is a flange 23 provided on the distal side of the actuating rod 2. In the initial state, the initial position of the first groove 51 of the first slider 5 is located on the proximal side of the boss 61 of the holder, and the initial position of the pressing member is located on the proximal side of the holder.

As shown in fig. 6 to 11, when the movable handle 3 is held in the initial state, the rotation of the movable handle 3 drives the connecting rod 32 to move toward the distal end of the stapler, so that the connecting rod 32 pushes the first slider 5 to move toward the distal end of the stapler, and the first recess 51 moves below the boss 61. The turning component converts the movement of the first slider 5 towards the far end side direction of the anastomat into the movement of the closing driving piece 83 towards the near end side direction of the anastomat, so that the closing driving piece 83 moves from the opening position to the closing position, and then the closing pull sheet 12 is pulled to move towards the near end side of the anastomat, and the nail head of the anastomat is closed. As shown in fig. 6, at this time, the third compression spring 84 is compressed and deformed by the urging force of the closing drive member 83.

Meanwhile, when the movable handle 3 is held and rotated in the initial state, the claw 31 on the movable handle 3 contacts with the pushing tooth 21 on the actuating rod 2 and pushes the pushing tooth 21 towards the distal direction of the stapler, so that the actuating rod 2 also moves towards the distal direction of the stapler, the actuating rod 2 drives the flange 23 to move towards the distal direction of the stapler until the actuating rod contacts with the third slider 7, the third slider 7 is pressed downwards, the third slider 7 drives the second slider 6 to move downwards, the boss 61 of the second slider 6 is embedded with the first groove 51 of the first slider 5, so as to block the movement of the first slider 5 towards the proximal side of the stapler, the closing driving piece 83 is kept at the closing position, and the stability of the nail head closing is kept. As shown in fig. 6 and 7, at this time, due to the downward pressure of the flange 23 on the third slider 7, the third slider 7 compresses the second compression spring 75 downward, so that the second compression spring 75 is compressively deformed. Preferably, in the initial state, a certain distance is provided between the first lifting portion 64 of the second slider 6 and the second lifting portion 41 of the push block 4, that is, the first lifting portion 64 of the second slider 6 is not in contact with the second lifting portion 41 of the push block 4; as shown in fig. 10 and 11, when the movable handle 3 is held to keep the nail head closed, the boss 61 of the second slider 6 is engaged with the first recess 51 of the first slider 5, and at this time, a slight distance is provided between the first raised portion 64 of the second slider 6 and the second raised portion 41 of the push block 4, that is, the first raised portion 64 is not in contact with the second raised portion 41, but when the push block 4 is raised upward, the push block 4 contacts and raises the first raised portion 64 during the upward movement, or the first raised portion 64 of the second slider 6 slightly contacts the second raised portion 41 of the push block 4, but the acting force of the second raised portion 41 on the first raised portion 64 is not enough to compress the first compression spring 74 and deform. The arrangement is such that when no pushing force is applied to the push block 4, the arrangement of the second raised portion 41 does not prevent the boss 61 of the second slider 6 from being fitted into the first recess 51 of the first slider 5, ensuring stable closure.

As shown in fig. 8, the distal side surface of the flange 23 is a flange first inclined surface 24 inclined upward from the proximal side edge to the distal side edge thereof, and the proximal side surface of the third slider 7 is a third slider first inclined surface 72 that cooperates with the flange first inclined surface 24. By the guiding interaction of the first inclined surface 24 of the flange and the first inclined surface 72 of the third slider, the flange 23 can contact and press the third slider 7 more smoothly when moving to the distal side of the stapler.

As shown in fig. 4 and 9, the distal end side surface of the first slider 5 is a first slider first inclined surface 53 inclined upward from the distal end side edge to the proximal end side edge thereof, the first slider first inclined surface 53 is an inclined surface inclined downward from the proximal end side edge to the distal end side edge thereof, and the proximal end side surface of the boss 61 of the second slider 6 is a boss inclined surface 62 engaged with the first slider first inclined surface 53. The projection 61 of the second slider 6 can be better guided into the first recess 51 of the first slider 5 by the interaction of the first slider first inclined surface 53 and the projection inclined surface 62. Further, the first groove 51 of the first slider 5 has a shape corresponding to the shape of the first projection 61, i.e., the proximal side of the first groove 51 is a first slider second slope 54 that slopes upward from the distal side to the proximal side thereof.

The distal end side of the first groove 51 of the first slider 5 is formed as a first stop surface 55, and correspondingly, the distal end side of the boss 61 of the second slider 6 is formed as a second stop surface 63, and the first stop surface 55 and the second stop surface 63 are both vertical surfaces. In the initial position, the first stop surface 55 is spaced apart from the second stop surface 63. When the boss 61 is located in the first groove 51, the first slider 5 is blocked from moving to the proximal side by the engagement of the two vertical surfaces of the first stop surface 55 and the second stop surface 63.

After closing of the staple head, when the movable handle 3 is gripped again in the state of the stapler shown in fig. 6, the movable handle 3 is gripped and rotated, the jaws 31 thereof are brought into contact with the rack 22 and the actuating rod 2 is pushed further in the distal direction of the stapler by pushing the rack 22, the actuating rod 2 is provided with a firing member 25, and the firing member 25 can fire the stapler during the movement in the distal direction of the stapler, so that the stapler staples and cuts tissue. During the firing of the stapler, the boss 61 of the second slider 6 is always kept in the first recess 51 of the first slider 5 by the pressing action of the flange 23, so that the stability of closing the nail head during the firing of the stapler is maintained.

At the completion of the stapler firing, if it is desired to open the staple head, so that the cartridge and the anvil are separated, it is necessary to disengage the retainer from the first slider 5, i.e. in this embodiment, the boss 61 of the second slider 6 from the first recess 51 of the first slider 5.

In the engaged state of the respective parts of the closing drive mechanism at the closing of the nail head shown in fig. 10, the doctor lifts the operating portion 42 of the push block 4 in the direction shown by the arrow a in fig. 10 so that the second lift portion 41 of the push block 4 lifts the first lift portion 64 of the second slider 6 upward when the push block 4 moves upward, so that the second slider 6 moves upward. As shown in fig. 12 and 13, when the second slider 6 is lifted up by the push block 4, since the height of the first slider 7 remains unchanged even under the pressing of the flange 23, the second slider 6 has a tendency to move upward with respect to the first slider 7 to compress the first compression spring 74 to deform, and the boss 61 of the second slider 6 moves upward to be separated from the first groove 51 of the first slider 5. Meanwhile, during the lifting process of the push block 4, the push block 4 compresses the third compression spring 43 to generate compression deformation, and the second slide block 6 is lifted upwards by the push block 4 to separate the boss 61 of the second slide block 6 from the first groove 51 of the first slide block 5. As shown in fig. 13, after the second slider 6 no longer defines the position of the first slider 5, the closing driver 83 pulls the pull rope 81 toward the distal end side of the stapler by the deformation restoring force of the third compression spring 84 toward the distal end side of the stapler, and the second slider 6 is driven toward the proximal end side of the stapler by the movement of the closing driver 83 by the steering action of the steering support beam 82. At this time, the closing driving component 83 drives the closing pull-tab 12 to move towards the far end side of the anastomat, the nail head of the anastomat can be opened, the nail anvil and the nail bin are separated, the tissue between the nail anvil and the nail bin can be released, and the cutting knife can be pulled back more smoothly.

Fig. 1 to 13 only show the specific structure of the closing driving mechanism according to one specific embodiment of the present invention, and do not limit the protection scope of the present invention. In other alternative embodiments, various modifications of the components can be made, and are within the scope of the present invention. For example, the position relationship between the second slider 6 and the third slider 7 is not limited to the manner of using the receiving groove, the third slider 7 may be provided with a guide groove, the second slider 6 may be embedded in the guide groove, and an elastic member may be disposed in the guide groove, so that the first slider 7 drives the second slider 6 to move downward when moving downward, and when the first slider 7 is fixed, the second slider 6 may move upward relative to the first slider 7. The structure of the second lifting portion of the push block 4 is not limited to the lifting arm, and other structures such as a bump and a circular truncated cone may be used. The pressing member is not limited to the flange structure of the actuating rod 2, and the firing member 25 may be used to press the third slider 7, or another boss structure that moves to the distal side when the movable handle 3 is held may be added as the pressing member, and so on.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A closing driving mechanism is characterized by being used for a medical anastomat and comprising a first sliding block, a retaining piece, a closing driving piece and a pushing block, wherein the first sliding block is connected with the closing driving piece and comprises a first embedding part, the retaining piece comprises a second embedding part and a first lifting part which are connected, and the pushing block comprises a second lifting part which is positioned below the first lifting part;

2. The closure drive mechanism of claim 1, wherein in an initial state, the second raised portion of the push block is not in contact with the first raised portion of the retainer.

3. The closure drive mechanism of claim 1, wherein the initial position of the first engagement portion is on a proximal side of the second engagement portion, the closure drive mechanism further comprising a movable handle and a pusher, the initial position of the pusher being on a proximal side of the holder;

4. The closure driving mechanism according to claim 3, further comprising an actuating lever, wherein the pressing piece is provided on a distal end side of the actuating lever, and the movable handle drives the actuating lever to move toward a distal end side of the stapler when the movable handle is gripped in an initial state.

5. The closure driving mechanism according to claim 3, wherein the holder includes a second slider and a third slider, the second slider includes the second fitting portion and the first raised portion, and the pressing member presses the third slider downward when the movable handle is gripped in the initial state, so that the third slider moves the second slider downward.

6. The closure drive mechanism of claim 5, wherein a first biasing member is disposed between the second slider and the third slider, the first biasing member biasing the second slider downwardly;

7. The closure driving mechanism according to claim 6, wherein when the nail head of the stapler is closed, the second lifting portion of the push block is not in contact with the first lifting portion of the second slider; or the like, or, alternatively,

8. The closure driving mechanism as claimed in claim 5, wherein a receiving slot is disposed inside the third slider, and the second slider is disposed in the receiving slot.

9. The closure driving mechanism according to claim 3, wherein a second biasing member is disposed between the pushing block and the housing of the stapler, the second biasing member providing a downward biasing force to the pushing block;

when the push block is lifted upwards, the second biasing piece deforms.

10. The closure drive mechanism of claim 3, wherein a proximal side of the closure drive is provided with a third biasing member that biases the closure drive in a direction toward a distal side of the stapler.

11. The closure driving mechanism according to claim 1, wherein the push block further comprises an operating portion, and a first side of the operating portion of the push block protrudes outside the housing of the stapler.

12. The closure drive mechanism of claim 11, wherein the second lift portion of the push block is a lift arm protruding from the second side of the operating portion.

13. The closure driving mechanism according to claim 1, wherein a fourth biasing member is provided between the retainer and the housing of the stapler, the fourth biasing member biasing the retainer in an upward direction.

14. The closure drive mechanism of claim 1, wherein the first engaging portion is a boss and the second engaging portion is a recess; or

The first embedding part is a groove, and the second embedding part is a boss.

15. A medical stapler, characterized in that it comprises a closure driving mechanism according to any one of claims 1 to 14.