CN216060626U - Driving mechanism for anastomat - Google Patents

Abstract

The utility model provides a driving mechanism for an anastomat, which comprises a shell, wherein the rear end of the shell is provided with a fixed handle, a movable handle is rotatably arranged on the fixed handle, and the movable handle is positioned in front of the fixed handle; the front end of the driving rod is of a double-fork-arm structure and comprises an accommodating cavity, an upper extending part and a lower extending part, wherein the upper extending part and the lower extending part are positioned in front of the accommodating cavity, and a gap is formed between the upper extending part and the lower extending part; a pawl is rotatably arranged at the upper end of the movable handle, and the front end of the pawl is abutted against a ratchet strip at the bottom of the driving rod; the rear end of actuating lever installs the button that resets, be equipped with on the shell along the button moving groove that resets of actuating lever length direction extension, the button that resets passes the button moving groove that resets. The utility model has simple structure and can provide stable linear driving force.

Description

Driving mechanism for anastomat

Technical Field

The utility model relates to the field of medical instruments, in particular to a driving mechanism for an anastomat.

Background

Due to the development of modern science and technology, a cutting anastomat replacing the traditional manual suture is produced; the cutting anastomat has the advantages of rapid and reliable anastomosis, few postoperative complications and the like. The working principle of the stapler is similar to that of a stapler, namely, a process of performing anastomotic cutting on tissues and organs by using titanium nails and a blade respectively. The existing cutting anastomat is mainly used for cutting and anastomosing skin, alimentary canal, blood vessel, lung and the like, and can be suitable for laparoscope and open surgery. The restoration and reconstruction of many lumen-like internal structures (such as urinary tract: including urethra, urinary bladder urethra, uretero bladder, ureter; intestinal tract, blood vessel, etc.) currently relies clinically mainly on manual tape-and-wire anastomosis and anastomosis using an intraluminal circular stapler or a plurality of linear cutting staplers. The intracavity circular anastomat is suitable for end-end or end-side anastomosis, but needs additional stoma, so that secondary anastomosis needs to be carried out on the stoma, and the operation difficulty, the operation cost and the possibility of operation complications are artificially increased; the staples are positioned in the tissue organ cavities, and are not applicable to a plurality of tissue organs needing eversion anastomosis (such as blood vessels, ureters and the like); the anastomosis nail is positioned in the cavity, so that postoperative stenosis, obstruction and other complications are easily caused; the use of a plurality of linear type cutting anastomats increases the difficulty of anastomosis operation, the necrosis of anastomotic stoma tissue, anastomotic fistula, hemorrhage or postoperative stenosis obstruction easily appear after the anastomosis nail juncture, and the use of a plurality of anastomosis stapling bins greatly increases the operation cost.

The problems of the prior art will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, two sections of the lumen to be sutured are formed during the operation, and the end ends of the lumen are sutured together.

Referring to fig. 2, 3 and 5, a currently common inverted anastomosis operation is performed, firstly, a wound a1 is cut on a lumen at the right end, the anastomat with a bent end in fig. 3 is inserted into the lumen, an operating handle of the anastomat is positioned outside the lumen, two broken ends of the lumen are pulled to a position between a circular nail anvil A8 and a circular nail bin a9, a nail pushing seat a11 is pushed to fire nails in the circular nail bin a10, the two broken ends of the lumen are nailed together, and redundant tissues are cut off by an annular blade a9, so that a circle of inverted suture lumen tissue a2 in fig. 2 is formed. The stapler is then removed from the lumen through opening a1 and opening a1 is sutured using the stapler of fig. 5. This type of stitching has at least three drawbacks: (1) by adopting the inversion type anastomosis, the inversion suture lumen tissue A2 protruding out of the inner wall of the lumen is formed in the lumen, and a plurality of complications such as stenosis, obstruction and the like can be easily caused after the operation. (2) A wound A1 needs to be cut on the lumen and needs to be anastomosed again, which increases the difficulty of the operation and also causes unnecessary pain to the patient due to the extra cut required by the operation. (3) The use of multiple staplers greatly increases the cost of the procedure.

Referring to fig. 4 and 5, a second anastomosis method is to pull the lumen at the right end in fig. 1, place the two cut ends side by side, so that the outer walls of the two lumens are attached together, then use the linear anastomat shown in fig. 5 to anastomose the attached lumen sides, that is, put the two attached lumen walls between the staple cartridge a6 and the staple anvil a7, fire the staples in the staple cartridge a6 to anastomose the lumen walls of the two lumens together, then open an ostomy opening A3 at the anastomosed position, and finally anastomose the ends of the two lumens together by using the linear anastomat shown in fig. 5. The stoma A3 is the communicating port of the two sections of the tube cavity. This type of anastomosis has at least three drawbacks: (1) because the original trend of one section of the tube cavity needs to be changed, the tube cavity is pulled by external force, and the mode can cause damage to the tube cavity. (2) After anastomosis, the flowing contents in the lumen move through the stoma A3, a 90-degree turn is formed in the lumen, the flow is not smooth enough, and the blockage is easy. (3) Two or more anastomoses are required, greatly increasing the cost and difficulty of the operation.

Fig. 6 shows an outward-turning type suture mode, two broken ends are turned outwards, and a circle of outward-turning suture lumen tissue A5 is formed after the suture mode. However, in the current operation, the method is limited to manual suture, and a anastomat cannot be used. As can be explained by referring to FIG. 3, if the broken ends of the two lumens are respectively everted on the circular anvil A8 and the circular nail bin A10 and then sutured, there is no way to remove the stapler from the sutured lumen after suturing. To achieve the eversion type anastomosis of the anastomat, the utility model patent with application number 201510282427X provides an extraluminal anastomosis method, which is to cut off the annular structures of the nail bin and the base by scissors after the lumen is sutured, so as to remove the nail bin and the base. However, this method is only an idea and does not give detailed structural features, which cannot be clinically applied for at least four reasons: (1) the surgical space is very small and it is difficult to cut the ring structure by inserting a further scissors between the tissue and the anastomotic ring after the stapling. (2) When the annular structure is cut off by the scissors, external force needs to be applied, secondary damage can be caused to the lumen tissue if the operation is not proper, and even the lumen is pulled off. (3) The materials that scissors are prone to shearing damage are necessarily not rigid enough to create sufficient anastomotic traction force and are destructive to surgical scissors. (4) The anastomosis mode that the nail anvil ring is pulled to extrude the anastomosis nail towards the near end is adopted, and because the distal end can not be peened in the operation, the organ of the tissue is easy to tear.

Disclosure of Invention

The utility model aims to provide a driving mechanism for a anastomat, which has a simple structure and can provide stable linear driving force.

The utility model provides a driving mechanism for an anastomat, which comprises a shell, wherein a fixed handle is arranged at the rear end of the shell, a movable handle is rotatably arranged on the fixed handle, and the movable handle is positioned in front of the fixed handle; the front end of the driving rod is of a double-fork-arm structure and comprises an accommodating cavity, an upper extending part and a lower extending part, wherein the upper extending part and the lower extending part are positioned in front of the accommodating cavity, and a gap is formed between the upper extending part and the lower extending part; a pawl is rotatably arranged at the upper end of the movable handle, and the front end of the pawl is abutted against a ratchet strip at the bottom of the driving rod; the rear end of actuating lever installs the button that resets, be equipped with on the shell along the button moving groove that resets of actuating lever length direction extension, the button that resets passes the button moving groove that resets.

The utility model utilizes the matching of the pawl and the ratchet strip to convert the rotation of the movable handle into linear driving force, and has simple structure and stable driving.

Preferably, in order to facilitate the retraction operation of the reset button, the present invention provides a shutter, and the pawl is separated from the ratchet by depressing the pawl when the shutter is retracted. One side or two sides of the driving rod are provided with flashboard limiting columns, and the two flashboard limiting columns positioned on the same side are respectively arranged at two ends of the driving rod; the driving rod is provided with a driving plate, the driving plate is provided with a driving plate limiting column, and the driving plate is provided with a driving plate; the rear end of the flashboard is connected with the reset button, the front end of the traction spring is installed on the driving rod, and the rear end of the traction spring is connected with the reset button; under the action of the traction spring, the bottom end of the waist-shaped hole of the gate plate is in contact with the gate plate limiting column, the reset button is pulled backwards, the reset button pulls the gate plate firstly, when the top end of the waist-shaped hole of the gate plate is in contact with the gate plate limiting column, the gate plate acts on the pawl to separate the pawl from the ratchet bar, and the reset button pulls the gate plate and the driving rod to retreat together.

Preferably, a traction spring installation cavity is formed in the driving rod, a traction spring installation column is arranged at the front end of the traction spring installation cavity, the traction spring is arranged in the traction spring installation cavity, and the front end of the traction spring is installed on the traction spring installation column.

Preferably, the spring fixing device further comprises a mounting plate arranged in the spring mounting cavity, the rear end of the mounting plate is connected with the reset button, and the front end of the mounting plate is connected with the rear end of the traction spring.

Preferably, still include the button axle that resets, the button axle that resets pass the button shifting chute that resets the rear end of flashboard, the button mounting hole that resets of actuating lever rear end, two the button that resets is installed respectively the both ends of the button axle that resets, traction spring's rear end and the button axle that resets are connected.

Preferably, the reset button moving groove is provided with a scale.

Preferably, a torsion spring for resetting the movable handle is sleeved on the rotating shaft of the movable handle; and a torsion spring which enables the pawl to abut against the ratchet strip is sleeved on the rotating shaft of the pawl.

The utility model utilizes the support of the pawl on the movable handle and the ratchet bar of the driving rod, pulls the movable handle and pushes the driving rod to move forwards through the pawl, converts the rotation of the movable handle into linear driving force, and has very simple structure.

Drawings

FIG. 1 is a schematic view of two lumens to be anastomosed;

FIG. 2 is a schematic view of an inverted anastomosis;

FIG. 3 is a schematic view of an inverted anastomosis stapler;

FIG. 4 is a schematic view of a second lumen anastomosis;

FIG. 5 is a schematic view of a stapler for external anastomosis;

FIG. 6 is a schematic view of eversion anastomosis;

FIG. 7 is a perspective view (left side view) of the present invention;

FIG. 8 is a perspective view (right view) of the present invention;

FIG. 9 is a cross-sectional view of the present invention;

FIG. 10 is a partial enlarged view of the present invention (elastic side wing of the nail magazine bar and the housing slot);

FIG. 11 is a partial schematic view of the operative components of the present invention;

FIG. 12 is a schematic view showing the engagement of the position-limiting button, the movable handle and the driving rod;

FIG. 13 is a schematic view showing the combination of a limit button, a nail bin lever, a nail pushing plate lever and an unlocking lever;

FIG. 14 is a schematic view showing the combination of a driving lever, a limit button, a nail bin lever, a nail pushing plate lever and an unlocking lever;

FIG. 15 is an exploded view of the driving lever, limit button, staple cartridge lever, staple pusher lever, and unlocking lever in a mated relationship;

FIG. 16 is an exploded view of the drive rod, reset button, and shutter;

FIG. 17 is a first view of an extension assembly;

FIG. 18 is a second schematic view of an extension assembly;

FIG. 19 is a schematic view of the front release latch of the release lever;

FIG. 20 is a schematic view showing the anvil ring, the staple cartridge ring, and the staple pusher ring being opened;

FIG. 21 is a schematic view of the staple cartridge ring and the lock;

FIG. 22 is an exploded view of the cartridge rod;

fig. 23 is an example of a male and female buckle;

fig. 24 is another example of the male and female buckles;

FIG. 25 is a schematic view of three release post connections;

FIG. 26 is a first schematic view showing the closure of the nail anvil ring, the nail magazine ring, and the nail-pushing plate ring;

FIG. 27 is a second schematic view showing the closing of the anvil ring, the staple cartridge ring, and the staple pusher ring;

FIG. 28 is a schematic view of the nail-pushing ring and the guard plate;

FIG. 29 is a partial view of an everted end-to-end anastomosis of tissue (in intestinal tissue for example);

fig. 30 is an overall schematic view of the example of fig. 29.

In the figure: a1-wound; a2-invagination suture lumen tissue; a3-stoma; a 4-suturing luminal tissue at the end; a5-everting suture luminal tissue; a6-nail bin; a7-anvil; a8-round anvil; a 9-ring blade; a10-circular staple cartridge; a11-nail pushing seat;

1-an anvil ring, 101-an anvil guard plate, 102-a connecting hinge, 103-a first half ring and 104-a second half ring;

2-cartridge ring, 201-staple, 202-connecting hinge, 203-first half ring, 204-second half ring, 205-avoiding groove, 206-ring mounting seat;

3-nail-pushing ring, 301-annular blade, 302-nail-pushing ring guard plate, 303-connecting hinge, 304-nail-pushing sheet;

4-limit button, 401-limit button groove, 402-limit button operation part; 403-limit button end projection;

5-driving rod, 501-ratchet bar, 502-upper extension, 503-gate plate limit column, 504-lower extension; 505-a reset button mounting hole, 506-a traction spring mounting column, 507-a traction spring mounting cavity, 508-an accommodating cavity and 510-a mounting plate;

6-a gate plate; 601-kidney shaped hole; 602-a shutter mounting hole;

7-reset button, 701-traction spring; 702-a reset button shaft;

8-movable handle, 802-fixed nut, 803-reset spring;

9-anvil rod lock catch, 901-male buckle, 902-female buckle, 903-unlocking spring and 904-unlocking column;

10-a nail bin rod lock catch, 1001-a male buckle, 1002-a female buckle, 1003-an unlocking spring, 1004-an unlocking column, 1005-an outward pushing spring, 1006-a male buckle groove and 1007-a rotating shaft hole;

11-nail-pushing sheet bar lock catch 1101-male buckle 1102-female buckle 1103-unlocking spring 1104-unlocking column;

12-unlocking lever, 1201-unlocking pressure plate, 1202-connecting rod, 1203-sliding seat, 1204-first unlocking lever spring, 1205-guide post, 1206-second unlocking lever spring;

13-unlocking button, 1301-spring column, 1302-sliding seat, 1303-connecting rod; 14-a pawl;

15-nail pushing sheet rod, 1501-nail pushing sheet rod rear end projection, 1502-avoiding hole;

16-a nail bin rod, 1601-a nail bin rod elastic side wing and 1602-a nail bin rod rear end protruding part; 1603-pushing surface;

17-anvil rod, 1701-unlocking rod through hole; 18-intestinal tract stump;

19-housing, 1901-fixed handle, 1902-reset button moving groove, 1903-limit button moving groove, 1904-unlock button moving groove, 1905-card slot.

Detailed Description

The technical solution of the present invention is explained in detail below with reference to fig. 7 to 30.

For clarity of description, directional terminology we use in the drawings and the following description with respect to an operator's right hand holding the stapler handle horizontally, i.e., the fixed handle is in the jaw of the right hand and the remaining four fingers except the thumb hold the movable handle. Specifically, the terms "proximal" and "rear" refer to a location near the operator, while the terms "distal" and "front" refer to a location away from the operator. The term "left" refers to the left side of the operator, while the term "right" refers to the right side of the operator; "upper" refers to the direction opposite to gravity and "lower" refers to the direction of gravity. Other directional terminology may be understood from the accompanying drawings and the description below.

The utility model provides an extraluminal circular cutting stapler comprising: an operating component, an extending component and an executing component.

The operating assembly comprises: the anastomat body, the handle trigger assembly and the opening and closing assembly.

As shown in fig. 7, 8 and 9, the stapler body mainly includes a housing 19, a fixing handle 1901 is provided at a lower portion of the housing 19, and is made of a relatively lightweight material such as plastic. The anastomat shell 19 is divided into two parts which are fixedly inserted together by rivet screws, and the middle of the shell is provided with a concave-convex surface for fixedly installing each component. The fixed handle 1901 is inclined backward and downward for the operator to hold, and a weight member can be appropriately added according to the overall weight evaluation of the stapler.

As shown in fig. 7, 8, 9, 11, 12, 14, 15, forward of the fixed handle 1901 is a trigger assembly. The trigger assembly includes a movable handle 8 located in front of a fixed handle, the movable handle 8 being mounted to a stapler fixed handle 1901 by a fixed nut 802 and corresponding bolt. The fixed handle 1901 is grasped and the movable handle 8 is pulled so that the movable handle rotates about the mounting point. The bolt is provided with a return spring 803, and after the movable handle is pulled and loosened, the movable handle 8 can return and rebound under the action of the return spring; the return spring 803 may generally be a torsion spring. The top end of the movable handle is provided with a U-shaped groove, and a pawl 14 is arranged in the groove. The rear end of the pawl 14 is rotatably installed in a groove of the movable handle 8, the pawl 14 is installed through a bolt and a nut, a return spring (such as a torsion spring) is correspondingly arranged on the bolt, the front end of the pawl 14 abuts against a ratchet bar at the bottom of the driving rod 5 through the pretightening force of the return spring, when external force acts downwards on the pawl 14, the front end of the pawl 14 is separated from the ratchet bar, and once the external force disappears, the front end of the pawl abuts against the ratchet bar again under the action of the return spring. The pawls 14 extend outwardly on both sides thereof so that downward external force applied by the shutter 6 acts on the pawls.

As shown in fig. 9, 11, 12, 14, 15 and 16, the opening and closing assembly mainly includes: a driving rod 5, a flashboard 6 and a reset button 7. The drive rod 5 is mounted in a housing 19 for movement back and forth within the housing. The driving rod 5 is a long column structure, and the bottom of the driving rod is provided with a ratchet 501. The both sides of actuating lever 5 respectively are provided with the spacing post 503 of 2 flashboards, and the spacing post 503 of 2 flashboards of every side is located the both ends of this side of actuating lever 5 respectively, and spacing post of flashboard and actuating lever integrated into one piece also can design independent part and install on the actuating lever. The top of the driving rod 5 is provided with a traction spring installation cavity 507, and the front end of the traction spring installation cavity 507 is provided with a traction spring installation column 506. The front end of the driving rod 5 is provided with a double fork arm structure, which includes an upper extension 502 and a lower extension 504 facing each other at the front, and a receiving cavity 508 in the middle. The rear end of the drive lever 5 is provided with a reset button mounting hole 505. The two ends of the gate plate 6 are respectively provided with a waist-shaped hole 601, the waist-shaped holes 601 are arranged in an inclined manner with a high front part and a low rear part, and the rear end of the gate plate 6 is provided with a gate plate mounting hole 602. Two sides of the driving rod 5 are respectively provided with 1 flashboard 6. The both sides of shell 19 are provided with the button that resets removal groove 1902, the button that resets axle 702 passes the button removal groove that resets in the left side in proper order, the left side flashboard mounting hole, reset button mounting hole 505, the right side flashboard mounting hole, the button removal groove resets on the right side, 2 the both ends at button axle 702 that resets are installed respectively to the button 7 that resets, traction spring 701 is placed in traction spring mounting cavity 507, its one end is installed on traction spring erection column 506, the front end at mounting panel 510 is installed to the other end, mounting panel 510 also is located traction spring mounting cavity, the rear end of mounting panel 510 has the hole, the middle part cover of button axle 702 that resets is in this hole, thereby realize mounting panel 510 and the button axle 702 that resets and be connected. The 2 kidney-shaped holes 601 of the gate plate 6 are respectively sleeved on the 2 gate plate limiting columns 503 on the side surface of the driving rod 5.

The engagement of the trigger assembly with the opening and closing assembly to effect the forward and reverse movement of the drive rod 5 will now be described in detail. Fig. 9 shows an initial state in which the reset button 7 is located at the rear end of the reset button moving groove 1902, and at this time, the shutter 6 is pulled up on the drive rod 5 by the traction spring 701, that is, the bottom end of the kidney-shaped hole 601 of the shutter 6 contacts the shutter stopper post 503, the ratchet bar 501 is exposed, and the front end of the pawl 14 abuts against the ratchet of the ratchet bar 501. Holding the handle, the movable handle 8 is pulled, so that the pawl 14 pushes the driving rod 5 to move forward through the ratchet bar 501. When the movable handle 8 is released and the reset button 7 is pulled backwards, the reset button 7 overcomes the pulling force of the traction spring 701 firstly, the flashboard 6 is pulled down, that is, the top end of the kidney-shaped hole 601 of the shutter 6 is brought into contact with the shutter stopper post 503, the shutter 6 moves downward by a certain distance with respect to the drive lever 5, the shutter 6 covers the ratchet 501 on the one hand, and on the other hand, applies an external force downward to the ratchet 14, the pawl 14 is rotated counterclockwise, the pawl 14 is separated from the ratchet bar 501, at this time, the reset button shaft 702 contacts with the rear wall of the reset button installation hole 505, and the drive rod 5 is driven to move backward by pulling the reset button backward, in the process, the flashboard 6 covers the ratchet bar 501 until the flashboard 6 is reset under the action of the traction spring after the reset button is released, and after the external force acting on the pawl 14 disappears, the pawl 14 is reset and then abuts against the ratchet bar again.

The main function of the trigger assembly of this embodiment is to apply a force to drive the drive rod 5 forward, whereas the retraction of the drive rod 5 is effected by pulling the reset button 7 backwards. It is reasonable to foresee that the driving rod 5 of the present invention drives the nail-pushing rod and the nail bin rod to move forward and backward, and the driving component that can realize the forward and backward movement of the driving rod can be applied to the present invention, for example, the trigger component is replaced by a motor, and the driving rod is moved and retreated by the motor. In the present embodiment, the pawl 14 is engaged with the ratchet bar, so that the operation of the operator can be facilitated, the operation is stable, and the structure is simple.

As shown in fig. 7, 8, 9, 10, 12, 13, 14, 15, the extension assembly includes: the rear ends of the nail anvil rod 17, the nail bin rod 16, the nail pushing sheet rod 15 and the unlocking rod 12 are all positioned in the anastomat shell 19, and the nail pushing sheet rod 15, the nail bin rod 16 and the nail anvil rod 17 are sequentially arranged along the direction from the left side to the right side of the anastomat. The anvil rod 17, the nail bin rod 16 and the nail pushing sheet rod 15 are all in a strip shape, and each rod is made of a material with high rigidity (such as metal). The rear end of the anvil rod 17 is immovably attached to the front end of the stapler body. The front ends of the nail pushing sheet rod 15, the nail bin rod 16 and the nail anvil rod 17 are respectively connected with the nail pushing sheet ring 3, the nail bin ring 2 and the nail anvil ring 1.

As shown in fig. 12, 13, 14 and 15, the rear end of the staple pusher bar 15 is connected to the front end of the driving rod 5, and the driving rod 5 drives the staple pusher bar 15 to move forward or backward together. The nail bin rod 16 is also driven by the driving rod 5 to advance or retreat, but is different from the nail sheet pushing rod 15 in that: when the nail bin rod 16 drives the nail bin ring 2 to abut against the nail anvil ring 1 in place, the movable handle 8 is pulled at the moment, the driving rod 5 continues to drive the nail sheet pushing rod 15 to advance, however, the driving rod 5 is required to be separated from the nail bin rod 16, and therefore, even if the driving rod 5 continues to advance, the nail bin rod 16 cannot be driven by the driving rod to move forwards. The utility model is realized by a limit button 4, specifically, a protruding part 1602 at the rear end of the nail bin rod 16 is in a convex shape, the protruding part 1602 at the rear end of the nail bin rod is placed in an accommodating cavity 508 at the front end of a driving rod 5, and a rod body of the nail bin rod 16 penetrates out of a gap between an upper protruding part 502 and a lower protruding part 504 of the driving rod 5. The inner end of the limit button 4 has a limit button end projection 403. A limit button moving groove 1903 is provided on the left side of the housing 19, and the limit button moving groove 1903 is a linear groove parallel to the reset button moving groove 1902. The outer end of the limit button 4 extends out of the shell from the limit button moving groove 1903, the limit button operating part 402 at the outer end is used for the operator to hold and operate the limit button 4, and the limit button end part projection 403 of the limit button 4 is positioned in the accommodating cavity 508. When the end projection 403 of the stop button is located at the rear end of the cartridge rod 16 and contacts the rear end of the cartridge rod, the end projection 403 of the stop button and the rear projection 1602 of the cartridge rod fill the receiving cavity 508, and the drive rod 5 pushes the cartridge push rod 16 forward together by means of the end projection 403 of the stop button. When the nail bin ring 2 abuts against the nail bin ring 1, the limit button 4 is pulled outwards or the limit button 4 is pushed inwards, so that the bump 403 at the end part of the limit button is separated from the protruding part 1602 at the rear end of the nail bin rod, at the moment, the driving rod 5 cannot continuously push the nail bin rod 16, specifically, a distance is reserved between the rear wall of the accommodating cavity 508 of the driving rod and the protruding part 1602 at the rear end of the nail bin rod, in the process that the driving rod 5 continuously moves forwards, the rear wall of the accommodating cavity 508 cannot be in contact with the protruding part 1602 at the rear end of the nail bin rod, the driving rod 5 cannot push the nail bin rod to move forwards, the distance is enough for the nail pushing piece rod to continue to move forwards, and the nail pushing piece ring 3 pushes out the anastomotic nails in the nail bin ring so as to enable the tissue broken ends to be anastomosed together. When the nail bin rod is required to be driven to move backwards, the driving rod 5 is pulled backwards, and the upper extending portion and the lower extending portion of the driving rod 5 can be driven to retreat after being contacted with the front end wall of the protruding portion 1602 at the rear end of the nail bin rod.

In order to enable an operator to visually see the moving strokes of the nail bin rod and the nail pushing sheet rod and the position reached in the operation process, the utility model can also indicate the moving stroke through the matching of the limit button 4 and the limit button moving groove 1903, and the limit button moving groove 1903 is provided with scales. According to the utility model, the left side of the accommodating cavity 508 is sealed, the left side wall is provided with the avoiding hole, and the limit button 4 penetrates through the avoiding hole and enters the accommodating cavity, so that the limit button can move along with the driving rod when the driving rod 5 moves.

The utility model also designs another scheme for realizing the synchronous movement of the limit buttons 4. The spacing hole 1502 is formed in the rear end of the nail pushing sheet rod 15, the limiting button 4 penetrates through the spacing hole, when the driving rod drives the nail pushing sheet rod 15 to move, the limiting button 4 can move together with the nail pushing sheet rod 15, and an operator can visually know how far the nail pushing sheet rod 15 moves through the moving distance of the limiting button 4, and further know how far the nail pushing sheet ring 3 moves. Referring to fig. 13, the rear end of the nail-pushing rod 15 of the present invention has a nail-pushing rod rear end protrusion 1501, which has a larger area, so that the clearance hole 1502 can be more conveniently disposed on the nail-pushing rod rear end protrusion 1501, and the nail-pushing rod 15 shown in fig. 13 is detachably connected to the driving rod 5, that is, the nail-pushing rod rear end protrusion 1501 is disposed in the accommodating cavity 508, the nail-pushing rod rear end protrusion 1501 is in a convex structure, and the rod body of the nail-pushing rod 15 penetrates through the gap between the upper protrusion 502 and the lower protrusion 504 of the driving rod 5. The rear wall of the protruding part 1501 at the rear end of the nail-pushing sheet rod is contacted with the rear wall of the accommodating cavity 508, and the driving rod can directly push the nail-pushing sheet rod to move forwards; the upper extension part, the lower extension part and the projection part at the rear end of the nail-pushing sheet rod are matched to pull the nail-pushing sheet rod to retreat.

The arrangement and function of the lock release lever 12 will be described below with reference to fig. 9, 10, 12 to 15, 17, and 19. The magazine lever 16 is provided with a magazine lever elastic side wing 1601, fig. 10 shows that the magazine lever elastic side wings 1601 are provided on the upper and lower surfaces of the magazine lever, and correspondingly, the inner wall of the housing 19 is provided with upper and lower rows of engaging grooves 1905 (the upper row of engaging grooves is not shown in fig. 10) at the front end of the housing 19. The cartridge rod 16 is further provided with an unlocking pressing plate 1201, and the unlocking pressing plate is connected with the unlocking rod 12. Referring to fig. 13 to 15 and 17, the anvil rod 17 has a long hole formed therein in a longitudinal direction, the unlocking lever is located in the long hole, and the rear end of the unlocking lever is inserted through the unlocking lever insertion hole 1701 and connected to the unlocking pressure plate 1201. As shown in fig. 8, an unlock button moving groove 1904 is provided on the right side of the housing 19, and after the unlock button 13 passes through the unlock button moving groove 1904, the inside of the housing is connected to the rear end of the unlock lever 12, and the unlock lever is pushed forward or backward in the direction of the anvil ring by holding the unlock button 13 with a hand. As shown in fig. 14 and 15, for convenient operation, the unlocking button 13 is arranged at the rear end of the connecting rod 1202, the connecting rod is L-shaped, the front end of the connecting rod 1202 is tilted upwards and connected with the unlocking rod 12, the rear end of the connecting rod 1202 is further provided with a sliding seat 1203, the sliding seat 1203 is sleeved on the guide post 1205 and can move back and forth along the guide post, the guide post 1205 is installed in the housing, and the operation is more stable through the guidance of the guide post. The sliding seat, the unlocking button and the connecting rod can be integrally formed and can also be assembled together by adopting a split structure.

Combine fig. 9, 10, the open direction of nail storehouse pole elasticity flank 1601 is towards the rear end, drives nail storehouse pole forward movement when actuating lever 5, and nail storehouse pole elasticity flank 1601 can hear the sound of "clacking" after arriving the draw-in groove region for operation operator's accessible sound knows the position that the nail storehouse ring reachs, until supporting with nail storehouse ring and lean on, and nail storehouse pole elasticity flank card realizes the location of nail storehouse pole in the draw-in groove, even the drive plate moves backward also is difficult to drive the nail storehouse pole and retreats. When the unlocking button 13 is held and the unlocking rod 12 is driven backwards to retreat, the unlocking pressing plate gradually retreats and presses the elastic side wing 1601 of the nail bin rod to contract, the elastic side wing 1601 of the nail bin rod is separated from the clamping groove 1905, and therefore the driving rod 5 can drive the nail bin rod to retreat together; when the nail bin rod needs to move forward again, the unlocking rod 12 is pushed to move forward, the unlocking pressing plate 1201 is gradually separated from the nail bin rod elastic lateral wing 1601, the nail bin rod elastic lateral wing 1601 loses the pressure of the unlocking pressing plate 1201 and then springs open, the nail bin rod is pushed forward until the nail bin rod reaches the position, and the nail bin rod elastic lateral wing is clamped in the clamping groove 1905.

As shown in fig. 15, in the present invention, a second unlocking lever spring 1206 and a first unlocking lever spring 1204 are respectively sleeved on the guide posts 1205 at two ends of the sliding seat 1203, and after the unlocking button is released, the unlocking lever springs (1204, 1206) can drive the unlocking lever 12 to return to the initial position (that is, the unlocking pressing plate 1201 is located in front of the elastic lateral wing 1601 of the magazine bar, and does not press the elastic lateral wing of the magazine bar), so as to avoid misoperation. The operation under this condition changes to some extent, and when the actuating lever drove the nail storehouse and moved forward, nail storehouse pole elasticity flank was opened, and the operation operator can hear the sound of "kaka", and nail storehouse pole elasticity flank card is in the draw-in groove after reaching the assigned position, and the difference lies in: when the nail bin rod needs to retreat, the unlocking pressing plate 1201 is pulled through the unlocking button 13 to extrude the nail bin rod elastic side wing 1601 (keeping the extrusion state), the driving rod 5 drives the nail bin rod to retreat to a specified position, then the unlocking button 13 is loosened, the unlocking pressing plate 1201 is reset under the action of the second unlocking rod spring 1206, the nail bin rod elastic side wing is opened, at the moment, the nail bin rod is directly driven to advance, and the unlocking pressing plate 1203 is not required to be loosened through the unlocking button 13.

The unlocking pressing plate in fig. 15 is frame-shaped, and can be made into other shapes such as [ -shaped, etc., as long as the elastic side wing of the nail bin rod can be pressed to be contracted. The unlocking pressure plate can be designed into an independent structure, is arranged on the unlocking pressure rod, and can also be integrated with the unlocking rod.

The nail bin rod, the nail pushing sheet rod and the nail anvil rod are in a strip shape, the unlocking rod is also in a strip shape integrally, and the rear end of the unlocking rod is in an arc shape.

With reference to fig. 17 and 18, the unlocking lever shown in fig. 17 is inserted into a long hole of the anvil lever 17, and the long hole plays a guiding role, and the unlocking lever in fig. 18 is arranged outside the anvil lever, and can also realize the function of the unlocking lever; to stabilize the movement, a guide ring (not shown) may be provided outside the anvil rod, and the release rod may be passed through the guide ring. In addition, it is preferable that the guide ring is provided in one piece along the length direction of the lock release lever, which not only serves a guiding function, but also serves a function similar to that of the anvil lever, i.e., when the lock release lever moves in a limited space, a forward force applied to the lock release lever is more easily converted into a force perpendicular to the direction of the lever body, thereby more effectively pushing the lock release lever.

As shown in fig. 20-24, the execution component includes: the nail anvil comprises a nail anvil ring 1, a nail bin ring 2, a nail pushing sheet ring 3 and an annular knife blade 301, wherein the nail bin ring 2 is provided with anastomosis nails.

The nail anvil ring 1, the nail bin ring 2 and the nail pushing sheet ring 3 are all in the shape of circular rings, the nail anvil ring is designed into a structure of a circular ring formed by splicing two half ring structures, and the splicing mode of the two half rings and how to realize the closing and opening of the circular ring are mainly described below by combining the nail bin ring shown in figures 20, 21 and 22. The nail bin ring 2 comprises a first half ring 203 and a second half ring 204, the nail bin ring 2 is integrally positioned on one side of the front end of the nail bin rod, one end of the second half ring 204 is connected with the front end of the nail bin rod 16, the other end of the second half ring 204 is connected with one end of the first half ring 203, the first half ring 203 can rotate relative to a connecting point, fig. 21 shows a connecting hinge 202, the first half ring and the second half ring are connected through the connecting hinge 202, it is foreseeable that the connecting hinge 202 can be replaced by a rotating shaft, as shown in fig. 22, the connecting ends of the two half rings are provided with rotating shaft holes 1007, and the rotating shaft can be installed in the rotating shaft holes to realize rotation. The nail bin rod lock catch 10 is arranged, specifically, a female buckle 1002 is arranged on the second half ring 204 at one end of the second half ring 204 connected with the nail bin rod, a male buckle 1001 is arranged at the corresponding end of the first half ring 203, the nail bin ring formed by splicing the first half ring and the second half ring can be realized by buckling the male buckle 1001 into the female buckle 1002, and the locking between the two half rings can be released by ejecting the male buckle 1001 out of the female buckle. The end of the second half-ring 204 and the nail bin rod are provided with through holes, the unlocking column 1004 is inserted into the through holes, the unlocking column is vertical to the length direction of the nail bin rod, the unlocking column 1004 is pushed towards the male buckle 1001, and the male buckle is pushed away from the female buckle by the unlocking column. An unlocking spring 1003 is sleeved on the unlocking column 1004, and after external force applied to the unlocking column disappears, the unlocking column resets under the action of the unlocking spring 1003. The male buckle 1001 is preferably a resilient arm made of a resilient material. As can be seen from fig. 21 and 22, the cartridge ring is provided with inner and outer layers of staples 201. The end parts of the two half rings are L-shaped, one half ring is thicker and the other half ring is thinner at the splicing part, so that anastomotic nails can be arranged at the thicker part, the splicing part is also provided with anastomotic nails, and the problem of anastomotic omission caused by anastomosis is avoided. The nail height and the nail length of the anastomosis nail can be different, and the anastomosis nail can be a non-absorbable metal nail or an absorbable nail and can be configured as required.

The end of the second half-ring 204 may be integrally formed with the cartridge lever 16 or may be a split mounting arrangement. As shown in fig. 22, the ring mounting seat 206 is provided at the end of the second half ring 204, and the ring mounting seat 206 is inserted into the through hole of the magazine bar 16 and then fastened with a screw. The unlocking post is inserted in the through hole of the ring mount 206. Because the operation has high requirement on disinfection, the anastomat belongs to disposable loss equipment and has high cost, the utility model separates the nail bin ring, the nail pushing sheet ring and the nail anvil ring from the anastomat body (comprising the nail bin rod, the nail pushing sheet rod and the nail anvil rod) by designing the split type mounting structure, and takes the nail bin ring, the nail pushing sheet ring and the nail anvil ring as the disposable loss equipment, and the other parts can be continuously disinfected for use, thereby greatly saving the cost and reducing the operation cost.

Fig. 23 shows another structure of the male and female buttons. A male buckle groove 1006 is formed in the end of the first half ring 203, the male buckle 1001 is a ball, the ball is installed in the male buckle groove 1006 through an outward pushing spring 1005, a part of the ball is exposed out of the male buckle groove, the exposed part of the ball is buckled into the female buckle 1002 to realize splicing locking, and the ball is pushed out of the female buckle through an unlocking column 1004 to realize separation.

Fig. 24 shows another structure of the male and female buttons. The first half ring 203 is provided with a hook-shaped male buckle 1001, the second half ring 204 is provided with a hook-shaped female buckle 1002, the two hook-shaped structures are used for realizing locking, and the unlocking column is used for pushing the female buckle 1002 outwards to realize separation. The female button 1002 is preferably made of an elastic material.

The three structural forms of the male buckle and the female buckle are schematically described above, and other applicable structural forms which can realize the two half-ring locking and can be unlocked by the unlocking column can be applied to the utility model. For example, the outward pushing spring, ball shown in fig. 23 is replaced by a plug pin, the plug pin is inserted into the female buckle to achieve locking, and the unlocking column pushes the plug pin out of the female buckle to unlock the locking.

The nail anvil ring and the nail-pushing sheet ring are also formed by two half rings, other structures are basically the same as the nail bin ring except that no anastomotic nails are arranged, and a nail anvil rod lock catch 9 (comprising a public disclosure 901 and a female buckle 902) and a nail-pushing sheet rod lock catch 11 (comprising a male buckle 1101 and a female buckle 1102) are arranged. One end of one of the half rings of the nail anvil ring and the nail pushing sheet ring is respectively connected with the nail anvil rod and the nail pushing sheet rod. Referring to FIG. 27, the staple cartridge ring 2 is located between the anvil ring 1 and the staple pusher ring 3, the staple pusher ring 3 is located at the proximal end (i.e., close to the operator), and the anvil ring 1 is located at the distal end (i.e., away from the operator). The nail-pushing sheet ring 3 and the nail anvil ring 1 are respectively provided with a nail-pushing sheet 304 and a nail-abutting position (not shown in the figure) corresponding to the anastomotic nails on the nail bin ring 2, and the nail-pushing sheet ring 3 is also provided with an annular blade 301 which is positioned at the outer edge of the nail-pushing sheet 304. The cooperation of the nail pushing sheet, the nail pushing position and the anastomosis nail is a conventional technology and is not described in detail.

With reference to fig. 20, 27 and 28, the second half-ring 104 of the anvil ring 1 is connected to the anvil rod 17, an anvil guard plate 101 is disposed at an end of the second half-ring 104 or on the anvil rod 17, the anvil guard plate 101 is located at an outer side of the anvil ring (an inner side close to the staple cartridge ring), and when the first half-ring 103 and the second half-ring 104 are spliced and locked, a spliced position is shielded by the anvil guard plate 101. Referring to fig. 20 and 26, at the joint between the nail-pushing ring 3 and the nail-pushing rod 15, a nail-pushing ring guard 302 is disposed at the end of the nail-pushing ring or on the nail-pushing rod, the nail-pushing ring guard 302 is located outside the nail-pushing ring (inside the nail-pushing ring), and when the two half rings are spliced and locked, the spliced part is shielded by the nail-pushing ring guard 302. Referring to fig. 26, 27 and 29, during anastomosis operation, the cut ends of the intestinal tract are turned outwards, the nail bin ring 2 abuts against the nail anvil ring 1, then the nail pushing sheet ring 3 is pushed, the nail pushing sheet pushes the anastomosis nails to anastomosis the two cut ends of the intestinal tract, and meanwhile, the annular blade cuts off redundant turned-out tissues. Tissue grooves (not shown in the figure) are reserved at the positions of the nail anvil ring and the nail bin ring, which are close to the nail anvil rod and the nail bin rod, and the cut tissues fall into the tissue grooves. In the process of pushing the nail pushing ring, due to the existence of the nail pushing ring protection plate, the force applied on the nail pushing rod 17 can be transmitted to the first half ring (i.e. the half ring positioned above in the drawing 20) by means of the nail pushing ring protection plate, so that the whole nail pushing ring is uniformly stressed, and the insufficient thrust of the first half ring is avoided. Due to the existence of the nail anvil guard plate 101, the spliced part of the nail anvil ring is blocked from the outside, so that the male buckle and the female buckle are prevented from being separated under the action of external force, and the whole nail anvil ring is stably stressed. The guard plate can be made of metal or other hard materials.

How the unlocking of the lock catch by the unlocking lever 12 is realized by the present invention will be described with reference to fig. 15, 17 and 19. Because the unlocking rod is positioned in the anvil rod 17, the unlocking columns corresponding to the nail anvil ring, the nail bin ring and the nail-pushing sheet ring all penetrate through the corresponding rod bodies to enter the nail anvil rod, specifically, the unlocking column on the nail anvil ring 1 penetrates through a hole on the nail anvil rod to enter the nail anvil rod, the unlocking column on the nail bin ring 2 penetrates through the nail bin rod and then penetrates through the position-avoiding groove on the nail anvil rod to enter the nail anvil rod, and the unlocking column on the nail-pushing sheet ring 3 penetrates through the nail-pushing sheet rod 15, penetrates through the position-avoiding groove 205 on the nail bin rod 16 and then enters the nail anvil rod through the position-avoiding groove on the nail anvil rod. The release lever shown in fig. 17 is not yet pushed to the end of the anvil rod (the ring is shown open, and the locked state is actually shown in fig. 26 during the surgical operation), and when the release lever is pushed to the position shown in fig. 19, the release lever 12 pushes the unlocking posts of the ejector pin ring, the cartridge ring, and the anvil ring to move from the anvil rod to the ejector pin, and the unlocking posts unlock the male and female fasteners in the manner described above. As shown in fig. 18, the unlocking rod 12 is located outside the anvil rod, and accordingly, the unlocking posts corresponding to the anvil ring, the staple cartridge ring, and the staple pusher ring all penetrate through the anvil ring, and can be pushed by the unlocking rod 12.

Because there is relative displacement along the length direction of the rod body between the nail pushing sheet rod and the nail bin rod, and between the nail pushing sheet rod, the nail bin rod and the nail anvil rod, when the unlocking column of the nail pushing sheet rod passes through the nail bin rod, enters or passes through the nail anvil rod, and the unlocking column of the nail bin rod enters or passes through the nail anvil rod, a avoiding groove (such as the avoiding groove 205 in fig. 15) extending along the length direction of the rod body needs to be arranged on the nail bin rod and the nail anvil rod, so as to avoid blocking the unlocking column of the nail pushing sheet ring and the nail bin ring.

As shown in fig. 25, the unlocking columns corresponding to the nail pushing sheet ring, the nail bin ring and the nail anvil ring are arranged from left to right in sequence, so that in order to facilitate the unlocking rod to be smoothly pushed to the end of each unlocking column, the 3 unlocking columns are connected through a connecting plate 1702, the end of the 1702 is provided with an inclined surface, and the unlocking rod is inserted into the bottom of the connecting plate 1702 through the inclined surface, so that the unlocking columns can be conveniently pushed.

The unlocking rod is used for unlocking the lock catches on the nail bin ring and the like, and is used for driving the unlocking pressing plate to contract the elastic side wing of the nail bin rod, so that the nail bin rod can be driven to retreat, only one unlocking button is needed, and the structure is simple. Obviously, two unlocking buttons can be arranged, one of the two unlocking buttons is connected with the unlocking rod, the other unlocking button is directly connected with the unlocking pressing plate, and the unlocking rod and the unlocking pressing plate are respectively driven through the two unlocking buttons.

In the above example, the nail pushing sheet rod is on the left side, the anvil rod is on the right side, the limit button is on the left side, and the unlock button is on the right side, which is just an example, the positions of the nail pushing sheet rod, the anvil rod, the limit button, and the unlock button can be adjusted, and the limit button and the unlock button can also be arranged on the same side, and those skilled in the art can adjust the positions as required.

The method of use of the present invention is described in detail below.

When the anastomat is in an initial state, the nail anvil ring 1, the nail bin ring 2 and the nail pushing sheet ring 3 are perpendicular to the corresponding rod bodies; the anvil ring 1, the nail bin ring 2 and the nail-pushing sheet ring 3 are all in an open-loop state, the nail anvil rod lock 9, the nail bin rod lock 10 and the nail-pushing sheet rod lock 11 are not locked, the male buckles 901, 1001 and 1101 are separated from the female buckles 902, 1002 and 1102 (as shown in fig. 20), the unlocking springs 903, 1003 and 1103 are in an original extended state, so that the unlocking columns 904, 1004 and 1104 are in a built-in ejection state, and the tail ends of the unlocking columns are located in the nail anvil rod (if the unlocking rods are not arranged in the nail anvil rod, the tail ends penetrate out of the nail anvil rod). The nail box ring 2 and the nail-pushing sheet ring 3 are close together and keep a distance of 4-5cm with the nail anvil ring 1 (as shown in figure 9). The unlock lever 12 is in the retracted state, and the unlock button 13 is in the intermediate position of the unlock-button moving groove 1904. The limit button 4 is fixed to the proximal end of the limit button moving groove 1903 by a safety catch (not shown in the figure), the limit button end projection 403 of the limit button 4 abuts against the pushing surface 1603 of the magazine rod 16, and the driving rod 5 can drive the magazine rod and the nail sheet pushing rod simultaneously. The reset button 7 is located at the proximal end of the reset button moving groove 1902, the drag spring pulls the shutter 6, the ratchet bar 501 below the driving lever 5 is exposed, and the pawl 14 is engaged with the ratchet bar 501.

The intestinal anastomosis is described below as an example, but the intestinal anastomosis is not limited to the intestinal tract, and can be applied to any cavity organ and scene capable of being everted and anastomosed. Removing redundant soft tissues around two broken ends of the intestinal tract, and sewing 2-4 traction lines at the edges of the broken ends respectively; the anastomat is taken out, the anastomat is in an initial state, a position suitable for surgical anastomosis is found, and the male buckles 901, 1001 and 1101 are respectively inserted into the female buckles B902, 1002 and 1102 to be locked into a ring. A broken end traction wire at the far end of the lifting anastomat penetrates through the nail anvil ring 1 from outside to inside, turns over the broken end of the intestinal tract at the far end, and is fixed on the inner side of the nail anvil ring 1; similarly, a broken end traction wire at the near end of the lifting anastomat penetrates through the nail pushing sheet ring 3 and the nail bin ring 2 from outside to inside in sequence, turns over the broken end of the intestinal tract at the near end, and is fixed on the inner side of the nail bin ring 2. After the two broken ends are aligned, the movable handle 8 is pulled, the ratchet bar 14 pushes the ratchet bar 501 of the driving rod 5 to push the driving rod to move forward, and the driving rod 5 drives the nail bin rod and the nail sheet pushing rod to move forward together; at the moment, the nail-pushing piece rod 15 and the nail bin rod 16 respectively drive the nail-pushing piece ring 3, the annular blade 301 and the nail bin ring 2 to move forwards, and simultaneously drive the broken end of the intestinal tract which is outwards turned on the nail bin ring to be attached to the broken end of the intestinal tract which is outwards turned on the nail bin ring. In the process that the driving rod drives the nail bin rod and the nail pushing piece rod to move forwards, when the elastic side wing 1601 of the nail bin rod reaches the region where the clamping groove is located, the two broken ends are already close, the elastic side wing 1601 of the nail bin rod is buckled to the clamping groove 1905 of the anastomat body, an operator can select the distance for driving the nail bin rod 16 to move forwards continuously according to the thickness of the anastomotic tissue, and can hear one sound or continuous multiple sounds of 'clicking' along with the movement of the elastic side wing 1601 of the nail bin rod until the two parts are tightly attached (note that the operator needs to control the tension and pressure of the anastomotic tissue according to an actual scene to prevent necrosis of the anastomotic tissue caused by overlarge tissue tension or pressure or lack of the anastomosis effect of subsequent cutting caused by overlarge tissue distance). At this time, the stop button 4 indicates that the distal end of the stop button moving groove 1903 is approached, and the operator may also determine whether the tissue is in place according to the scale of the stop button moving groove 1903. After the joint is in place, the movable handle 8 is stopped being pressed. Confirming that the peripheries of two broken ends of the intestinal tract are respectively positioned between the nail anvil ring 1 and the nail bin ring 2, and the involution and the alignment are good to prepare for the anastomosis.

When two broken ends of the intestinal tract are inspected before anastomosis, if the tissue apposition alignment between the nail anvil ring 1 and the nail bin ring 2 is not good enough or partially falls off, the tissue apposition alignment condition needs to be adjusted again. Specifically, the unlocking button 13 is pulled back to the near end to drive the unlocking rod 12 to move towards the near end, and after the unlocking button 13 is pulled back to a certain range of scales corresponding to the unlocking button moving groove 1904, at this time, the unlocking rod 12 drives the unlocking pressing plate 1201 to retract only to the position of the nail bin rod elastic lateral wing 1601, the nail bin rod elastic lateral wing 1601 is pressed, the nail bin rod elastic lateral wing 1601 is no longer clamped with the clamping groove, and the movement limitation of the nail bin rod 16 is relieved. At this time, the reset button 7 is pulled back, the gate plate 6 moves backward and downward under the pull back of the reset button 7, the gate plate 6 pushes down the pawl 14 and covers the ratchet bar 501 below the driving rod 5, the pawl is not engaged with the ratchet bar 501, the reset button 7 is pulled back continuously to drive the driving rod 5 to retreat, the driving rod 5 drives the nail pushing piece rod 15 and the nail bin rod 16, and further drives the nail pushing piece ring 3 and the nail bin ring 2 to move to a proper position towards the near end. The tissue involution and contraposition condition between the nail anvil ring 1 and the nail bin ring 2 is adjusted, after the two broken ends are in perfect involution and contraposition, the unlocking button 13 is loosened, the unlocking rod 12 returns to the original position under the action of the second unlocking spring 1206 (at the moment, the unlocking rod drives the unlocking pressing plate to move forwards, the unlocking pressing plate is separated from the elastic flank of the nail bin rod, if the second unlocking spring is not arranged, the unlocking button 13 needs to be manually pushed forwards, and the unlocking pressing plate is driven to be separated from the elastic flank of the nail bin rod through the unlocking rod). Then the movable handle 8 is pulled until the two ends of the tissue are fit in place, and the anastomosis is waited.

When the stapler is in a state of waiting for anastomosis, the nail bin ring and the nail anvil ring are abutted, and the nail bin ring can not move any more (meanwhile, the elastic side wing of the nail bin rod is clamped with the clamping groove, the nail bin rod is very stable, the relative position of the nail anvil ring 1 and the nail bin ring 2 is kept fixed, and the tissues at two opposite broken ends cannot be loosened). The safety plug is pulled out, the limit button 4 is pushed inwards, so that the lug 403 at the end part of the limit button is separated from the pushing surface 1603 of the nail bin rod, at the moment, the driving rod is separated from the nail bin rod, and the nail bin rod cannot be driven to move forwards when the driving rod moves forwards. Then the movable handle 8 is pulled, and the driving rod 5 drives the nail-pushing sheet rod 15 to move forwards. The nail-pushing piece rod 15 drives the nail-pushing piece ring 3 and the annular blade 301 to move forward, and at the moment, the nail-pushing ring guard plate 302 ensures that two half rings of the nail-pushing piece ring 3 are in the same plane, and the anastomosis strength is enhanced. The nail-pushing sheet on the nail-pushing sheet ring pushes the anastomotic nail to move towards the nail anvil ring 1 and puncture the tissue, and the anastomotic nail is formed. The anvil guard plate 101 ensures that the two half rings of the anvil ring 1 are in the same plane, and enhances the anastomosis strength (as shown in fig. 28), and the annular blade 301 cuts off the redundant tissues at the periphery of the anastomosis.

The movable handle 8 is loosened, the unlocking button 13 is pushed forwards, the unlocking rod 12 is driven to move forwards, the unlocking rod 12 presses the unlocking columns 904, 1004 and 1104, the unlocking columns press the male buckles 901, 1001 and 1101 to be separated from the female buckles 902, 1002 and 1102, and therefore the nail anvil ring, the nail bin ring and the nail pushing sheet ring are opened. The nail anvil ring 1, the nail bin ring 2 and the nail-pushing sheet ring 3 can be smoothly moved away from the connected intestinal tract by rotating the rotatable half ring of the nail anvil ring 1, the nail bin ring 2 and the nail-pushing sheet ring 3 in the operation, and the anastomat is taken out from the anastomotic opening to finish the cutting anastomosis.

Claims (7)

1. A drive mechanism for a stapler, comprising a housing, characterized in that: the rear end of the shell is provided with a fixed handle, a movable handle is rotatably arranged on the fixed handle, and the movable handle is positioned in front of the fixed handle; the front end of the driving rod is of a double-fork-arm structure and comprises an accommodating cavity, an upper extending part and a lower extending part, wherein the upper extending part and the lower extending part are positioned in front of the accommodating cavity, and a gap is formed between the upper extending part and the lower extending part; a pawl is rotatably arranged at the upper end of the movable handle, and the front end of the pawl is abutted against a ratchet strip at the bottom of the driving rod; the rear end of actuating lever installs the button that resets, be equipped with on the shell along the button moving groove that resets of actuating lever length direction extension, the button that resets passes the button moving groove that resets.

2. The drive mechanism for a stapler according to claim 1, wherein: one side or two sides of the driving rod are provided with flashboard limiting columns, and the two flashboard limiting columns positioned on the same side are respectively arranged at two ends of the driving rod; the driving rod is provided with a driving plate, the driving plate is provided with a driving plate limiting column, and the driving plate is provided with a driving plate; the rear end of the flashboard is connected with the reset button, the front end of the traction spring is installed on the driving rod, and the rear end of the traction spring is connected with the reset button; under the action of the traction spring, the bottom end of the waist-shaped hole of the gate plate is in contact with the gate plate limiting column, the reset button is pulled backwards, the reset button pulls the gate plate firstly, when the top end of the waist-shaped hole of the gate plate is in contact with the gate plate limiting column, the gate plate acts on the pawl to separate the pawl from the ratchet bar, and the reset button pulls the gate plate and the driving rod to retreat together.

3. The drive mechanism for a stapler according to claim 2, wherein: the traction spring is characterized in that a traction spring mounting cavity is arranged on the driving rod, a traction spring mounting column is arranged at the front end of the traction spring mounting cavity, the traction spring is arranged in the traction spring mounting cavity, and the front end of the traction spring is mounted on the traction spring mounting column.

4. The drive mechanism for a stapler according to claim 3, wherein: still including setting up the mounting panel in the spring installation cavity, the rear end and the button that resets of mounting panel are connected, and its front end is connected with traction spring's rear end.

5. The drive mechanism for a stapler according to claim 2, wherein: still including the button axle that resets, the button axle that resets pass the button shifting chute that resets the rear end of flashboard, the button mounting hole that resets of actuating lever rear end, two the button that resets is installed respectively the both ends of the button axle that resets, traction spring's rear end and the button axle that resets are connected.

6. The driving mechanism for a stapler according to any one of claims 1-5, wherein: and scales are arranged on the reset button moving groove.

7. The driving mechanism for a stapler according to any one of claims 1-5, wherein: a torsion spring for resetting the movable handle is sleeved on the rotating shaft of the movable handle; and a torsion spring which enables the pawl to abut against the ratchet strip is sleeved on the rotating shaft of the pawl.

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