Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a closing driving mechanism and a medical stapler including the same, wherein the position of the closing driving member is limited when the nail head is closed by the jogging of the holding member and the first slider, and the holding member is separated from the first slider by the lifting action of the pushing block after the firing of the stapler is completed, so that the closing driving member can move to open the nail head.
The embodiment of the invention provides a closing driving mechanism which is used for a medical anastomat and comprises a first sliding block, a holding 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 jogged part, the holding piece comprises a second jogged part and a first lifting part which are connected, and the pushing block comprises a second lifting part positioned below the first lifting part;
When the nail head of the anastomat is closed, the first jogged part of the first sliding block is positioned below the second jogged part of the retainer, the first jogged part is jogged with the second jogged part, and 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 retainer upwards, and the second jogged part lifts upwards to be separated from the first jogged 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 part is located at the proximal end side of the second fitting part, and the closing drive mechanism further includes a movable handle and a pressing member, the initial position of the pressing member being located at the proximal end side of the holding member;
when the movable handle is held in an initial state, the first sliding block moves towards the distal end side of the anastomat, so that the first jogging part moves to the lower part of the second jogging part, the pressing piece moves towards the distal end side of the anastomat and presses the retaining piece downwards, so that the second jogging part moves downwards to jogge with the first jogging part, and the first sliding block drives the closing driving piece to move towards the proximal end side of the anastomat so as to close the nail head.
Optionally, the closing driving mechanism further comprises an actuating rod, the pressing piece is arranged on the distal end side of the actuating rod, and when the movable handle is held in an initial state, the movable handle drives the actuating rod to move towards the distal end side of the anastomat.
Optionally, the holding member 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 pushing block is lifted up 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 anastomat is closed, the second lifting part of the pushing block is not contacted with the first lifting part of the second sliding block, or,
When the nail head of the anastomat is closed, the second lifting part of the pushing block is in contact with the first lifting part of the retainer, but the acting force of the second lifting part on the second sliding block is insufficient to drive the first biasing piece to deform.
Optionally, a containing groove is formed in the third sliding block, and the second sliding block is arranged in the containing groove.
Optionally, a second biasing member is arranged between the push block and the housing of the anastomat, and the second biasing member provides a downward biasing force to the push block;
When the pushing block is lifted upwards, the second biasing member is deformed.
Optionally, a third biasing member is provided on the proximal side of the closure driving member, the third biasing member biasing the closure driving member in a direction towards the distal side of the stapler.
Optionally, the pushing block further comprises an operation part, and a first side of the operation part of the pushing block protrudes out of the outer side of the shell of the anastomat.
Optionally, the second lifting portion of the push block is a lifting arm protruding from the second side of the operating portion.
Optionally, a fourth biasing member is provided between the holding member and the housing of the stapler, the fourth biasing member biasing the holding member upward.
Optionally, the first jogged part is a boss and the second jogged part is a groove, or
The first jogged part is a groove, and the second jogged part is a boss.
The embodiment of the invention also provides a medical anastomat, which comprises the closing driving mechanism.
The closing driving mechanism and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a closing driving mechanism for a medical anastomat, which is characterized in that before the anastomat is triggered, after the head of a nail is pulled to be closed by a closing driving piece, the position of the closing driving piece is limited by the jogging of a retaining piece and a first sliding block, the closing pulling piece is prevented from moving towards the distal end side of the anastomat when the anastomat is triggered, and after the anastomat is triggered, a pushing block is lifted upwards when the nail head is required to be opened, the retaining piece is separated from the first sliding block through the lifting effect of the pushing block, the position of the closing driving piece is not limited any more, and the closing driving piece can return to the initial position, so that a nail bin and a nail anvil can be opened, and a cutter can be pulled back very smoothly.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.
FIG. 1 is a schematic view showing a partial structure of a stapler in an initial state according to a first embodiment of the present invention;
FIG. 2 is a schematic view of the stapler housing of FIG. 1 with the stapler housing removed;
FIG. 3 is a schematic view showing the positions of the first slider and the holder in an initial state according to the first embodiment of the present invention;
FIG. 4 is a perspective view of the first slider and the retainer in an initial state according to the first embodiment of the present invention;
FIG. 5 is a schematic view showing the cooperation of 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 part of the stapler when the head of the first embodiment of the present invention is closed;
FIG. 7 is a schematic view of the structure of the retainer of the first slider when the head of the first embodiment of the present invention is closed;
FIG. 8 is a perspective view of the closure driving mechanism of the first embodiment of the present invention when the head is closed;
FIG. 9 is a schematic view of the structure of the retainer when the head of the first embodiment of the present invention is closed;
FIG. 10 is a schematic view of the structure of the retainer, the pusher and the first slider when the head of the first embodiment of the present invention is closed;
FIG. 11 is a schematic view of the structure of the push block when the nail head is closed according to the first embodiment of the present invention;
FIG. 12 is a perspective view of the retainer and first slider engaged when lifting the push block in accordance with the first embodiment of the present invention;
fig. 13 is a schematic structural view of the retainer and the first slider in cooperation when lifting the push block according to the first embodiment of the present invention.
Reference numerals:
1. first groove of anastomat body 51
11. Second groove of fixed handle 52
12. First slider first inclined surface of pull tab 53
13. First slider second inclined surface of housing 54
2. First stop surface of actuating lever 55
21. Second slide of propulsion tooth 6
22. Rack 61 boss
23. Flange 62 boss ramp
24. Flange first ramp 63 second stop surface
25. First lifting part of firing part 64
3. Third slider of movable handle 7
31. Claw 71 accommodating groove
32. First inclined surface of third slide block of connecting rod 72
4. First compression spring of push block 74
41. Second lifting part 75 second compression spring
42. Operation part 81 pull rope
43. Third compression spring 82 steering support beam
44. The first guide 83 closes the driving member
5. The first slider 84 is a third compression spring
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
In order to solve the technical problems in the prior art, the invention provides a closing driving mechanism for a medical anastomat and the medical anastomat comprising the nail bin. The anastomat comprises a nail head part and an anastomat body, wherein a closing pull piece for closing the nail head part 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, the closing drive is defined to have a closed position in which the head is closed and an open position in which the head is open. The first slider is connected with the closing driving piece, the first slider comprises a first jogged part, the retaining piece comprises a second jogged part and a first lifting part which are connected, and the pushing block comprises a second lifting part positioned below the first lifting part.
When the nail head of the anastomat is closed, the first jogged part of the first sliding block is positioned below the second jogged part of the retainer, the first jogged part is jogged with the second jogged part, the closing driving piece is kept at the closing position under the action of the retainer, and the nail head is kept in the closing state and cannot be opened accidentally. After the anastomat is triggered, when the nail head needs to be opened, an operator lifts the push block upwards, the second lifting part of the push block lifts the first lifting part of the retainer upwards, and the first lifting part drives the second embedded part connected with the push block to lift upwards so as to be separated from the first embedded part, so that the retainer does not limit the position of the first slider, namely the position of the closed driving part connected with the first slider is not limited, the closed driving part loses the retaining effect of the retainer and can move to the opening position, and the nail head can be opened, and the cutter can be pulled back very smoothly at the moment.
The structure of the closing drive mechanism and the stapler according to the present invention in the embodiment will be specifically described with reference to fig. 1 to 13.
As shown in fig. 1 to 5, in a first embodiment of the present invention, the anastomat includes an anastomat body 1 and a nail head (not shown) located at a distal end side of the anastomat body 1, the anastomat body 1 includes a housing 13 and a fixed handle 11, a closing tab 12 for closing a nail head and opening the nail head is further provided in the interior of the anastomat body 1, the closing tab 12 is opened in an initial state, the nail head is closed when the closing tab 12 moves toward a proximal end side of the anastomat, and the nail head can be reopened when the closing tab 12 moves toward a distal end side of the anastomat. The closing drive mechanism comprises a first slider 5, a retaining member, a closing drive member 83 and a push block 4, wherein the first slider 5 is connected with the closing drive member 83, the first slider 5 comprises a first jogged part, the retaining member comprises a second jogged part and a first lifting part 64 which are connected, and the push block 4 comprises a second lifting part 41 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 nearer to the operator. For example, in the view 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 direction means, for the actuating lever 2, the direction toward the side facing away from the rack 22, and the downward and downward direction is opposite thereto, for example, in the view of fig. 2, the upward direction means the upper end in the drawing.
In this embodiment, the first engaging portion of the first slider 5 is a first groove 51, and the second engaging 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 will describe an example of the structure 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, the inside of the third slider 7 is provided with a receiving groove 71, 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 disposed 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 which gives the third slider 7 an upward biasing force. In this embodiment, the first biasing member is a first compression 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 compression 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 respectively 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 operation portion 42, and the second lifting portion 41 of the push block 4 is a lifting arm protruding from a second side of the operation portion 42. The first side of the operating part 42 of the push block 4 protrudes outside the housing of the anastomat, and a doctor can directly operate the operating part 42 of the push block 4 outside the instrument. A second biasing member is arranged between the push block 4 and the housing of the anastomat, and the second biasing member provides a downward biasing force for the push block 4. In this embodiment, the second biasing member is a third compression spring 43 disposed above the push block 4. However, the present invention is not limited thereto, and in other alternative embodiments, the second biasing member may also use other elastic structures such as a compression spring, a metal spring, and the like. As shown in fig. 10 and 11, the push 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) adapted thereto, and the first guiding portion 44 and the second guiding portion are mutually in a boss and groove structure, and the push block 4 is arranged along the direction of the third compression 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, i.e. the side facing 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, the proximal side of the closure driving member 83 is provided with a third biasing member which gives the closure driving member 83 a biasing force in the distal direction of the stapler. In this embodiment, the third biasing member is a third compression spring 84 disposed on the proximal side of the closing driving member 83, and in other alternative embodiments, the third biasing member may also use other elastic structures such as a tension spring, a metal spring plate, and the like.
The first slider 5 is connected to the closing drive 83 via a steering assembly. The steering assembly includes a steering support beam 82 and a stay 81, the steering support beam 82 is fixedly provided to the housing 13, and preferably, the steering support beam 82 is provided as a pulley to reduce resistance when the stay 81 moves. The pulley 82 is located at the proximal end side of the first slider 5, the pull rope 81 is sleeved outside the pulley 82, and the pull 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 fixed end. The proximal side of the first slider 5 may be provided with a second groove 52, and a fixed end of the pulling cord 81 is detachably mounted in the second groove 52. The other fixed end of the pulling string 81 is detachably connected to the closing driving means 83. By the structure of the pulling 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 piece 83.
In this embodiment, the closure driving mechanism further includes a movable handle 3 and a pressing piece, which is a flange 23 provided on the distal end side of the actuating lever 2. In the initial state, the initial position of the first groove 51 of the first slider 5 is located on the proximal end side of the boss 61 of the holder, and the initial position of the pressing member is located on the proximal end side of the holder.
As shown in fig. 6 to 11, when the movable handle 3 is held in the initial state, the rotational movement of the movable handle 3 drives the connecting rod 32 to move towards the distal end side of the stapler, so that the connecting rod 32 pushes the first slider 5 to move towards the distal end side of the stapler, and the first groove 51 moves below the boss 61. The steering assembly converts the movement of the first slider 5 in the distal direction of the stapler into the movement of the closure driving member 83 in the proximal direction of the stapler, so that the closure driving member 83 moves from the open position to the closed position, and then the closure tab 12 is pulled to move in the proximal direction of the stapler, thereby closing the staple head of the stapler. At this time, as shown in fig. 6, the third compression spring 84 is compressed and deformed by the force of the closing driver 83.
Meanwhile, when the movable handle 3 is held and rotated in the initial state, the claw 31 on the movable handle 3 is contacted with the pushing teeth 21 on the actuating rod 2 and pushes the pushing teeth 21 towards the distal end direction of the anastomat, so that the actuating rod 2 also moves towards the distal end side direction of the anastomat, the actuating rod 2 drives the flange 23 to move towards the distal end side direction of the anastomat, after contacting with the third slide block 7, the third slide block 7 is pressed downwards, the third slide block 7 drives the second slide block 6 to move downwards, the boss 61 of the second slide block 6 is jogged with the first groove 51 of the first slide block 5 so as to prevent the movement of the first slide block 5 towards the proximal end side of the anastomat, the closing driving piece 83 is kept at the closing position, and the stability of the closed nail head is kept. At this time, as shown in fig. 6 and 7, the third slider 7 compresses the second compression spring 75 downward due to the downward pressure of the flange 23 on the third slider 7, 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 groove 51 of the first slider 5, and at this time, a slight 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 is not in contact with the second lifting portion 41, but it is required to ensure that the push block 4 contacts and lifts the first lifting portion 64 during the upward movement, or that the first lifting portion 64 of the second slider 6 is slightly in contact with the second lifting portion 41 of the push block 4, but the second lifting portion 41 does not apply a sufficient force to generate compression deformation of the first lifting portion 64. The arrangement is such that the arrangement of the second lifting portion 41 does not hinder the boss 61 of the second slider 6 from being engaged with the first groove 51 of the first slider 5 when no pushing force is applied to the push block 4, ensuring stable closure.
As shown in fig. 8, the distal side of the flange 23 is a flange first slope 24 inclined upward from the proximal side to the distal side thereof, and the proximal side of the third slider 7 is a third slider first slope 72 that mates with the flange first slope 24. By the interaction of the flange first inclined surface 24 and the third slider first inclined surface 72, the flange 23 can more smoothly contact and press the third slider 7 when moving toward the distal end side of the stapler.
As shown in fig. 4 and 9, the distal side of the first slider 5 is a first slider first inclined surface 53 inclined upward from the distal side to the proximal side thereof, the first slider first inclined surface 53 is an inclined surface inclined downward from the proximal side to the distal side thereof, and the proximal side of the boss 61 of the second slider 6 is a boss inclined surface 62 engaged with the first slider first inclined surface 53. By the interaction of the first slider first ramp 53 and the boss ramp 62, the boss 61 of the second slider 6 can be better guided into the first groove 51 of the first slider 5. Further, the first groove 51 of the first slider 5 has a shape corresponding to the shape of the first boss 61, i.e., the proximal side of the first groove 51 is a first slider second inclined surface 54 inclined upward from the distal side to the proximal side thereof.
The distal side of the first groove 51 of the first slider 5 is formed as a first stop surface 55, and the distal 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. By the cooperation of the two perpendicular surfaces of the first stop surface 55 and the second stop surface 63, the first slider 5 is blocked from moving to the proximal side when the boss 61 is located in the first groove 51.
After the nail head is closed, when the movable handle 3 is held again in the state of the anastomat shown in fig. 6, the movable handle 3 is held to rotate, the claw 31 of the movable handle is contacted with the rack 22, and the actuating rod 2 is continuously pushed to move towards the distal end direction of the anastomat by pushing the rack 22, the actuating rod 2 is provided with the firing piece 25, and the firing piece 25 can fire the anastomat in the process of moving towards the distal end direction of the anastomat, so that the anastomat can anastomat and cut tissues. During the firing of the stapler, the boss 61 of the second slider 6 is always kept in the first groove 51 of the first slider 5 under the pressing action of the flange 23, so that the closing stability of the nail head is kept during the firing of the stapler.
At the completion of the stapler firing, if it is desired to open the staple head so that the staple cartridge and anvil are separated, it is desired to disengage the retainer from the first sled 5, i.e. in this embodiment, the boss 61 of the second sled 6 is disengaged from the first recess 51 of the first sled 5.
In the engaged state of the respective components of the closure driving mechanism when the nail head is closed shown in fig. 10, the doctor lifts the operation portion 42 of the push block 4 in the direction indicated by the arrow a in fig. 10, so that when the push block 4 moves upward, the second lifting portion 41 of the push block 4 lifts the first lifting portion 64 of the second slider 6 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 first slider 7 remains at a constant height 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 of the push block 4, the push block 4 compresses the third compression spring 43 to generate compression deformation, and the second slider 6 is lifted upward by the push block 4 to separate the boss 61 of the second slider 6 and the first groove 51 of the first slider 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 cord 81 to move toward the distal side of the stapler by the deformation restoring force of the third compression spring 84 toward the distal side of the stapler, and the movement of the closing driver 83 drives the second slider 6 to move toward the proximal side of the stapler by the steering action of the steering support beam 82. At this time, the closing driver 83 drives the closing tab 12 to move toward the distal end of the stapler, the head of the stapler can be opened, the anvil and the cartridge can be separated, and the tissue between the anvil and the cartridge can be released, thereby more smoothly pulling the cutter back.
Fig. 1 to 13 only show a specific structure of a closing driving mechanism according to an embodiment of the present invention, and are not intended to limit the scope of the present invention. In other alternative embodiments, various modifications may be made to the individual components thereof, all falling within the scope of the present invention. For example, the positional relationship between the second slider 6 and the third slider 7 is not limited to adopting a manner of a receiving groove, a guide groove may be formed on the third slider 7, 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 have an upward movement tendency relative to the first slider 7 at the same time. The structure of the second lifting part of the push block 4 is not limited to the lifting arm, and other structures such as a bump, a round table and the like can be adopted. The pressing member is not limited to the flange structure of the actuating lever 2, and the firing member 25 may be used to press the third slider 7, or other boss structure may be added as a pressing member that moves to the distal side when the movable handle 3 is held.
The closing driving mechanism and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a closing driving mechanism for a medical anastomat, which is characterized in that before the anastomat is triggered, after the head of a nail is pulled to be closed by a closing driving piece, the position of the closing driving piece is limited by the jogging of a retaining piece and a first sliding block, the closing pulling piece is prevented from moving towards the distal end side of the anastomat when the anastomat is triggered, and after the anastomat is triggered, a pushing block is lifted upwards when the nail head is required to be opened, the retaining piece is separated from the first sliding block through the lifting effect of the pushing block, the position of the closing driving piece is not limited any more, and the closing driving piece can return to the initial position, so that a nail bin and a nail anvil can be opened, and a cutter can be pulled back very smoothly.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.