A stapler

Abstract

The present invention provides a stapler, comprising a shell, a stapler bar, a stapler pusher bar, and a staple anvil bar, wherein the stapler bar is located between the stapler pusher bar and the staple anvil bar, and the front ends of the stapler bar, the stapler pusher bar, and the staple anvil bar are respectively provided with a stapler ring, a stapler pusher ring, and a staple anvil ring; at the rear end of the stapler bar, the stapler bar is provided with a stapler bar elastic flank, and the stapler bar elastic flank is opened backward; in front of the stapler bar elastic flank, the stapler bar is provided with an unlocking plate that can move forward and backward along the stapler bar; a slot that cooperates with the stapler bar elastic flank is provided inside the front end of the shell, and when the unlocking plate moves to the stapler bar elastic flank, the stapler bar elastic flank is retracted, and when the unlocking plate moves away from the stapler bar elastic flank, the stapler bar elastic flank engages with the slot. In the case where the anastomosis tissue alignment is not ideal, the present invention can realize the retraction of the stapler bar by retracting the elastic flank by the unlocking plate.

Description

Technical Field

[0001] The invention relates to the field of medical devices and in particular to a stapler. Background Art

[0002] With the development of modern science and technology, cutting staplers have been developed to replace traditional manual suturing. Cutting staplers have the advantages of rapid and reliable anastomosis and few postoperative complications. Its working principle is similar to that of a stapler, that is, the process of using titanium nails and blades to perform anastomosis and cutting of tissues and organs respectively. Existing cutting staplers are mainly used for cutting and anastomosis of the skin, digestive tract, blood vessels, lungs, etc., and can be applied to laparoscopic and open surgery. The repair and reconstruction of many tubular structures in the body (such as the urinary tract: including urethra, bladder urethra, ureteral bladder, ureter; intestines, blood vessels, etc.) currently rely mainly on manual wire anastomosis and the use of intracavitary circular staplers or multiple linear cutting staplers. Intracavitary circular staplers are suitable for end-to-end or end-to-side anastomosis, but they require an additional stoma, so the stoma needs to be anastomosed a second time, which artificially increases the difficulty of the operation, the cost of the operation, and the possibility of surgical complications; and the staples are located in the cavity of tissues and organs, which are not applicable to many tissues and organs that require eversion anastomosis (such as blood vessels, ureters, etc.); staples located in the cavity are also prone to cause many complications such as postoperative stenosis and obstruction; the use of multiple linear cutting staplers increases the difficulty of anastomosis surgery, and the junction of staples is prone to anastomotic tissue necrosis, anastomotic fistula, bleeding, or postoperative stenosis and obstruction. At the same time, the use of multiple anastomotic staplers greatly increases the cost of surgery.

[0003] The problems existing in the prior art are described in detail below with reference to the accompanying drawings.

[0004] like Figure 1 As shown, two sections of lumens to be sutured are formed during the operation, and the ends of the lumens need to be sutured together.

[0005] Combination Figure 2 , 3 5 is the commonly used inversion anastomosis surgery. First, an incision A1 is made on the right end of the lumen. Figure 3 The stapler with the bent end in the middle is inserted into the lumen, and the operating handle of the stapler is located outside the lumen. The two ends of the lumen are pulled between the circular anvil A8 and the circular stapler magazine A9, and the stapler pusher A11 is pushed to fire the staples in the circular stapler magazine A10, thereby staple the two ends of the lumen together, and the annular blade A9 removes the excess tissue, thereby forming a Figure 2 Then take the stapler out of the lumen through the incision A1 and use Figure 5The incision A1 is sutured with the stapler in the lumen. This suturing method has at least three defects: (1) The inverted anastomosis is used to form an inverted sutured lumen tissue A2 protruding from the inner wall of the lumen, which can easily cause stenosis, obstruction and many other complications after surgery. (2) An incision A1 needs to be opened on the lumen and anastomosed again. This incision is opened additionally due to surgical needs, which increases the difficulty of the surgery and causes unnecessary pain to the patient. (3) The use of multiple staplers greatly increases the cost of the surgery.

[0006] Combination Figure 4 , 5 This is the second matching method. Figure 1 Pull the right end of the lumen in the middle, place the two ends side by side, so that the outer walls of the two lumens stick together, and then use Figure 5 The linear stapler shown in the figure staples the two lumens together, that is, places the two lumens between the staple cartridge A6 and the staple anvil A7, fires the staples in the staple cartridge A6 to staple the two lumens together, then opens a fistula A3 at the stapled part, and finally staples the two lumens together. Figure 5 The two sections of the lumen are anastomosed with the linear stapler shown. The fistula opening A3 becomes the connecting opening of the two sections of the lumen. This anastomosis method has at least three defects: (1) Since the original direction of one section of the lumen needs to be changed and the lumen is pulled by external force, this method itself will cause damage to the lumen. (2) After the anastomosis, the flowing contents in the lumen move through the fistula opening A3, forming a 90-degree turn in the lumen, and the flow is not smooth enough and is easily blocked. (3) Two or more anastomoses are required, which greatly increases the cost and difficulty of the operation.

[0007] Figure 6 The figure shows the everted suture method, which turns the two broken ends outward and forms a circle of everted sutured lumen tissue A5 after suturing. The advantages of this method are obvious. The suture point is outside the lumen and will not cause complications such as postoperative stenosis and obstruction. However, in current surgeries, this method is limited to manual suturing and cannot use an anastomosis device. It can be combined with Figure 3To illustrate, if the two ends of the lumen are respectively turned outward on the circular anvil A8 and the circular stapler A10, and then sutured, there is no way to remove the stapler from the sutured lumen after suturing. In order to achieve the everted anastomosis of the stapler, the invention patent with application number 201510282427X provides a method for extraluminal anastomosis. After the lumen is sutured, the method uses scissors to cut the annular structure of the stapler and the base, thereby removing the stapler and the base. However, this method is only an idea and does not provide detailed structural features. There are at least four reasons why it cannot be used clinically: (1) The surgical space is very small, and it is difficult to insert another pair of scissors between the tissue and the anastomosis ring to cut the annular structure after suturing. (2) When using scissors to cut the annular structure, external force needs to be applied. If the operation is improper, it will cause secondary damage to the lumen tissue or even pull the lumen off. (3) The rigidity of the material that is easily cut and damaged by scissors is necessarily insufficient to form sufficient anastomotic traction force, which is also destructive to surgical scissors. (4) The anastomosis method of pulling the anvil ring of the stapler toward the proximal end is adopted. Because the distal end cannot be observed during the operation, it is easy to cause tissue and organ tearing. Summary of the invention

[0008] The object of the present invention is to provide a stapler, which can easily withdraw the stapler ring if a positioning problem is found during the anastomosis process, and then re-align the anastomotic tissues to improve the anastomosis success rate.

[0009] The stapler provided by the present invention comprises a housing, a stapler bar, a stapler pusher bar, and a staple anvil bar, wherein the stapler bar is located between the stapler pusher bar and the staple anvil bar, and the front ends of the stapler bar, the stapler pusher bar, and the staple anvil bar are respectively provided with a stapler ring, a stapler pusher bar, and a staple anvil ring, and the rear end of the staple anvil bar is fixedly installed in the housing, and the rear ends of the stapler pusher bar and the stapler bar are movably installed in the housing and can move forward and backward along the length direction of the rod body;

[0010] At the rear end of the nail magazine rod, the nail magazine rod is provided with elastic side wings of the nail magazine rod, and the elastic side wings of the nail magazine rod are opened rearwardly; in front of the elastic side wings of the nail magazine rod, the nail magazine rod is provided with an unlocking pressure plate that can move forward and backward along the nail magazine rod; the front end of the shell is internally provided with a slot that cooperates with the elastic side wings of the nail magazine rod, when the unlocking pressure plate moves to the elastic side wings of the nail magazine rod, the elastic side wings of the nail magazine rod are contracted, and when the unlocking pressure plate moves away from the elastic side wings of the nail magazine rod to the distal end, the elastic side wings of the nail magazine rod engage with the slot.

[0011] Preferably, a driving rod that can move forward and backward is provided in the shell, and the driving rod is connected to the rear end of the nail pushing rod; the front end of the driving rod is a double fork arm structure, and the rear end of the nail magazine rod has a convex-shaped rear end protrusion of the nail magazine rod, and the rear end protrusion of the nail magazine rod is located in the accommodating cavity of the double fork arm structure, and the rod body of the nail magazine rod passes through the gap between the upper protrusion and the lower protrusion of the double fork arm structure; the shell is also provided with a limit button moving groove extending along the length direction of the rod body and a limit button passing through the limit button moving groove; the limit button has a limit button end protrusion, and the limit button end protrusion extends into the accommodating cavity; the limit button can move along its length direction, and when the limit button end protrusion is located between the rear wall of the accommodating cavity and the rear end protrusion of the nail magazine rod, the driving rod can drive the nail magazine rod to move forward.

[0012] Preferably, the rear end of the nail pushing rod has a rear end protrusion of the nail pushing rod in a convex shape, the rear end protrusion of the nail pushing rod is located in the accommodating cavity and contacts the front wall and the rear wall of the accommodating cavity, and the rod body of the nail pushing rod passes through the gap between the upper protrusion and the lower protrusion of the double fork arm structure; the rear end protrusion of the nail pushing rod is provided with a through hole for the limit button to pass through.

[0013] Preferably, the limit button moving groove is provided with a scale.

[0014] Preferably, the nail pusher ring, nail magazine ring, and nail anvil ring each include a first half ring and a second half ring;

[0015] The hinged ends of the first half ring and the second half ring are rotatably connected, and the fixed ends of the second half rings of the nail pushing plate ring, the nail magazine ring and the nail anvil ring are respectively connected to the front ends of the nail pushing plate rod, the nail magazine rod and the nail anvil rod; the rear end of the nail anvil rod is fixedly installed in the shell, and the rear ends of the nail pushing plate rod and the nail magazine rod are movably installed in the shell and can move forward and backward along the length direction of the rod body; the nail pushing plate ring, the nail magazine ring and the nail anvil ring are all provided with a lock that locks the free end of the first half ring to the fixed end of the second half ring, and when the unlocking rod is pushed forward along the length direction of the rod body, the unlocking rod opens the lock; the rear end of the unlocking rod is connected to the unlocking pressure plate.

[0016] Preferably, the lock buckle comprises a male buckle and a female buckle, the male buckle is arranged on the free end of the first half ring, and the female buckle is arranged on the fixed end of the second half ring, and when the male buckle and the female buckle are locked together, an annular structure is formed; an unlocking column perpendicular to the length direction of the rod body is arranged in the second half ring;

[0017] The unlocking rod is located at the outside of the anvil rod, and the unlocking columns of the nail pushing ring, nail magazine ring and anvil ring respectively pass through the anvil rod and extend out of the anvil rod, or the unlocking rod is arranged in the anvil rod, and the rear end of the unlocking rod is located outside the anvil rod, and the unlocking columns of the nail pushing ring, nail magazine ring and anvil ring respectively extend into the anvil rod; the nail magazine rod is provided with an avoidance groove for the unlocking column of the nail pushing rod to move along the length direction of the rod body, and the anvil rod is provided with an avoidance groove for the unlocking columns of the nail pushing rod and the nail magazine rod to move along the length direction of the rod body; when the unlocking rod is pushed forward, the unlocking rod pushes the unlocking column to move in the direction away from the anvil rod, thereby opening the locking of the male buckle and the female buckle through the unlocking column.

[0018] Preferably, the male buckle is an elastic arm, the female buckle is a groove, and the unlocking column pushes the elastic arm out of the groove to open the lock.

[0019] Preferably, a male buckle groove is provided at the free end of the first half ring, the male buckle is a sphere, and the sphere is arranged in the male buckle groove through an outward push spring, the female buckle is a groove, and the unlocking column pushes the sphere out of the groove to open the lock.

[0020] Preferably, the male buckle and the female buckle are both hook-shaped, the hook-shaped male buckle is hooked with the hook-shaped female buckle to form a lock, and the unlocking column lifts the hook-shaped female buckle to open the lock.

[0021] Preferably, an unlocking spring is sleeved on the unlocking column.

[0022] Preferably, the housing is provided with an unlocking button moving groove extending along the length direction of the rod body, and also includes an unlocking button extending out of the housing from the unlocking button moving groove, and the inner end of the unlocking button is connected to the unlocking rod.

[0023] Preferably, it also includes a connecting rod, a guide column arranged along the length direction of the rod body is installed in the outer shell, the sliding seat at the rear end of the connecting rod can be slidably installed on the guide column, the front end of the connecting rod is connected to the rear end of the unlocking rod, and the inner end of the unlocking button is connected to the connecting rod.

[0024] Preferably, on both sides of the sliding seat, the guide column is respectively sleeved with a first unlocking lever spring and a second unlocking lever spring.

[0025] Preferably, the elastic side wings of the nail magazine rod are arranged on the upper and lower surfaces of the nail magazine rod, and the unlocking pressure plate is frame-shaped or "["-shaped.

[0026] The stapler provided by the present invention is designed with a retraction adjustment correction structure to address the situation that the stapler ring may not be fully aligned during the operation. The structure can realize the retreat of the stapler ring, separate the stapler ring from the stapler anvil ring, and realign them. After the anastomosis is successfully aligned, the elastic flanks and the card slots cooperate to prevent the stapler ring from moving. The present invention adopts a new concept of eversion anastomosis to ensure the smoothness of the lumen after the anastomosis, especially for situations such as blood vessels that require eversion and rapid anastomosis and there is no suitable stapler available clinically. It solves the shortcomings of the previous end-to-end anastomosis during the operation, which requires additional holes to be opened and additional anastomosis, which not only reduces clinical costs, but also reduces anastomosis-related complications and shortens the operation time. The external staplers are located outside the cavity after the anastomosis, which reduces stapler-related complications, such as anastomotic stenosis, stapler-related bleeding, stone formation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of two sections of lumens to be anastomosed;

[0028] Figure 2 This is a schematic diagram of varus anastomosis;

[0029] Figure 3 A schematic diagram of a stapler for varus anastomosis;

[0030] Figure 4 This is a schematic diagram of the second luminal anastomosis method;

[0031] Figure 5 A schematic diagram of a stapler for external anastomosis;

[0032] Figure 6 This is a schematic diagram of eversion anastomosis;

[0033] Figure 7 It is a stereogram of the present invention (left view);

[0034] Figure 8 It is a stereogram of the present invention (right view);

[0035] Fig. 9 It is a cross-sectional view of the present invention;

[0036] Fig.10 It is a partial enlarged view of the present invention (elastic side wings of the nail magazine rod and the housing slot);

[0037] Fig.11 It is a partial schematic diagram of the operating components of the present invention;

[0038] Fig.12 It is a schematic diagram of the coordination of the limit button, movable handle and driving rod;

[0039] Fig.13 It is a schematic diagram of the coordination of the limit button, the nail magazine rod, the nail pusher rod, and the unlocking rod;

[0040] Fig.14 It is a schematic diagram of the coordination of the driving rod, the limit button, the nail magazine rod, the nail pushing rod, and the unlocking rod;

[0041] Fig.15 An exploded diagram of the coordination relationship among the driving rod, the limit button, the nail magazine rod, the nail pusher rod, and the unlocking rod;

[0042] Fig.16 This is the exploded view of the drive rod, reset button, and gate;

[0043] Fig.17 Schematic diagram of extended components Figure 1 ;

[0044] Fig.18 Schematic diagram of extended components Figure 2 ;

[0045] Fig.19 This is a schematic diagram of the unlocking buckle in front of the unlocking lever;

[0046] Fig. 20 It is a schematic diagram of the opening of the nail anvil ring, nail magazine ring, and nail pusher ring;

[0047] Fig.21 It is a schematic diagram of the nail magazine ring and the lock buckle;

[0048] Fig. 22 This is the exploded view of the nail magazine rod;

[0049] Fig.23 It is an example of a male buckle and a female buckle;

[0050] Fig.24 Another example of a male buckle and a female buckle;

[0051] Fig.25 It is a schematic diagram of the connection of three unlocking columns;

[0052] Fig.26 The anvil ring, the magazine ring, and the pusher ring are closed. Figure 1 ;

[0053] Fig. 27 The anvil ring, the magazine ring, and the pusher ring are closed. Figure 2 ;

[0054] Fig.28 It is a schematic diagram of the push pin ring and the guard plate;

[0055] Fig.29 This is a partial schematic diagram of tissue eversion end-to-end anastomosis (taking intestinal tissue as an example);

[0056] Fig.30 for Fig.29 An overall schematic diagram of the example.

[0057] In the figure: A1-wound; A2-inversion suturing lumen tissue; A3-stoma; A4-end suturing lumen tissue; A5-exversion suturing lumen tissue; A6-nail magazine; A7-nail anvil; A8-circular nail anvil; A9-annular blade; A10-circular nail magazine; A11-nail pusher;

[0058] 1-anvil ring, 101-anvil guard plate, 102-connecting hinge, 103-first half ring, 104-second half ring;

[0059] 2- stapler ring, 201- anastomotic staples, 202- connecting hinge, 203- first half ring, 204- second half ring, 205- avoidance groove, 206- ring mounting seat;

[0060] 3-nail pusher ring, 301-annular blade, 302-nail pusher ring guard, 303-connecting hinge, 304-nail pusher;

[0061] 4-limit button, 401-limit button groove, 402-limit button operating part; 403-limit button end convex block;

[0062] 5-driving rod, 501-spike, 502-upper extension, 503-gate plate limiting column, 504-lower extension; 505-reset button mounting hole, 506-traction spring mounting column, 507-traction spring mounting cavity, 508-accommodating cavity, 510-mounting plate;

[0063] 6-gate; 601-waist-shaped hole; 602-gate mounting hole;

[0064] 7-reset button, 701-traction spring; 702-reset button shaft;

[0065] 8-movable handle, 802-fixing nut, 803-reset spring;

[0066] 9-anvil rod lock buckle, 901-male buckle, 902-female buckle, 903-unlocking spring, 904-unlocking column;

[0067] 10-nail magazine rod lock buckle, 1001-male buckle, 1002-female buckle, 1003-unlocking spring, 1004-unlocking column, 1005-external push spring, 1006-male buckle slot, 1007-rotating shaft hole;

[0068] 11-nail push rod lock buckle, 1101-male buckle, 1102-female buckle, 1103-unlocking spring, 1104-unlocking column;

[0069] 12-unlocking rod, 1201-unlocking pressure plate, 1202-connecting rod, 1203-sliding seat, 1204-first unlocking rod spring, 1205-guide column, 1206-second unlocking rod spring;

[0070] 13-unlock button, 1301-spring column, 1302-sliding seat, 1303-connecting rod; 14-pawl;

[0071] 15-nail pusher rod, 1501-protruding portion at the rear end of the nail pusher rod, 1502-avoidance hole;

[0072] 16- nail magazine rod, 1601- elastic side wing of nail magazine rod, 1602- rear end protrusion of nail magazine rod; 1603- pushing surface;

[0073] 17-anvil rod, 1701-hole for unlocking rod; 18-intestinal stump;

[0074] 19-housing, 1901-fixed handle, 1902-reset button moving slot, 1903-limit button moving slot, 1904-unlock button moving slot, 1905-card slot. DETAILED DESCRIPTION

[0075] Combine the following Figure 7-30 The technical solution of the present invention is described in detail.

[0076] For the sake of clarity, the directional terms we use in the accompanying drawings and the following description are relative to the operator's right hand holding the stapler handle horizontally, that is, the fixed handle is located in the base of the right hand, and the remaining four fingers except the thumb hold the movable handle. Specifically, the terms "near" and "back" refer to the position close to the operator, while the terms "far" and "front" refer to the position away from the operator. The term "left" refers to the operator's left side, while the term "right" refers to the operator's right side; "up" refers to the direction opposite to gravity, and "down" refers to the direction of gravity. Other directional terms can be understood based on the accompanying drawings and the following description.

[0077] The annular cutting stapler for extracavitary use provided by the present invention comprises an operating component, an extending component and an executing component.

[0078] The operating components include: anastomosis device body, a handle trigger component, and an opening and closing component.

[0079] like Figure 7 , 8 As shown in FIG. 9 , the stapler body mainly includes a shell 19, and a fixed handle 1901 is provided at the lower part of the shell 19. The stapler body is made of relatively light materials such as plastic. The stapler shell 19 is divided into two halves, which are fixed together by rivets and screws. The middle of the shell has a concave and convex surface for fixing and installing various components. The fixed handle 1901 is tilted backward and downward for the surgical operator to hold. According to the overall weight assessment of the stapler, a counterweight block can be appropriately added.

[0080] like Figure 7 , 8As shown in Figures 9, 11, 12, 14, and 15, the trigger assembly is located in front of the fixed handle 1901. The trigger assembly includes a movable handle 8 located in front of the fixed handle, and the movable handle 8 is installed on the stapler fixed handle 1901 through a fixing nut 802 and a corresponding bolt. When the fixed handle 1901 is held and the movable handle 8 is pulled, the movable handle can rotate around the installation point. A reset spring 803 is provided on the bolt. After the movable handle is pulled and released, the movable handle 8 can be reset and rebounded under the action of the reset spring; the reset spring 803 can generally use a torsion spring. A U-shaped groove is provided at the top of the movable handle, and a ratchet 14 is installed in the groove. The rear end of the pawl 14 is rotatably mounted in the groove of the movable handle 8. The pawl 14 is mounted by bolts and nuts. A reset spring (such as a torsion spring) is also provided on the bolt accordingly. The front end of the pawl 14 is pressed against the ratchet bar at the bottom of the driving rod 5 by the preload force of the reset spring. When an external force acts downward on the pawl 14, the front end of the pawl 14 is separated from the ratchet bar. Once the external force disappears, the front end of the pawl is pressed against the ratchet bar again under the action of the reset spring. Both sides of the pawl 14 extend outward so that the downward external force applied by the gate 6 acts on the pawl.

[0081] like Fig. 9 , 11, 12, 14, 15, and 16, the opening and closing assembly mainly includes: a driving rod 5, a gate plate 6, and a reset button 7. The driving rod 5 is installed in the housing 19 and can move forward and backward in the housing. The driving rod 5 is a long columnar structure with a thorn bar 501 at the bottom. Two gate plate limiting columns 503 are arranged on both sides of the driving rod 5, and the two gate plate limiting columns 503 on each side are respectively located at the two ends of the side of the driving rod 5. The gate plate limiting columns are integrally formed with the driving rod, and can also be designed as independent components installed on the driving rod. A traction spring mounting cavity 507 is arranged at the top of the driving rod 5, and a traction spring mounting column 506 is arranged at the front end of the traction spring mounting cavity 507. A double fork arm structure is arranged at the front end of the driving rod 5, including an upper protrusion 502 and a lower protrusion 504 facing each other at the front, and a cavity 508 is arranged in the middle. A reset button mounting hole 505 is arranged at the rear end of the driving rod 5. The two ends of the gate plate 6 are respectively provided with waist-shaped holes 601, which are inclined with the front being higher and the rear being lower. The rear end of the gate plate 6 is provided with a gate plate mounting hole 602. A gate plate 6 is respectively provided on both sides of the driving rod 5. The two sides of the housing 19 are provided with a reset button moving groove 1902, and the reset button shaft 702 passes through the left reset button moving groove, the left gate plate mounting hole, the reset button mounting hole 505, the right gate plate mounting hole, and the right reset button moving groove in sequence. The two reset buttons 7 are respectively installed at the two ends of the reset button shaft 702, and the traction spring 701 is placed in the traction spring mounting cavity 507, one end of which is installed on the traction spring mounting column 506, and the other end is installed at the front end of the mounting plate 510. The mounting plate 510 is also located in the traction spring mounting cavity. The rear end of the mounting plate 510 has a hole, and the middle part of the reset button shaft 702 is sleeved in the hole, so as to realize the connection between the mounting plate 510 and the reset button shaft 702. The two waist-shaped holes 601 of the gate plate 6 are respectively sleeved on the two gate plate limiting columns 503 on the side of the driving rod 5.

[0082] The following is a detailed description of the cooperation between the trigger assembly and the opening and closing assembly to realize the forward and backward movement of the driving rod 5. FIG9 shows the initial state, in which the reset button 7 is located at the rear end of the reset button moving groove 1902. At this time, under the action of the traction spring 701, the gate plate 6 is pulled on the driving rod 5, that is, the bottom end of the waist-shaped hole 601 of the gate plate 6 contacts the gate plate limiting column 503, the ratchet bar 501 is exposed outside, and the front end of the pawl 14 abuts against the ratchet teeth of the ratchet bar 501. Hold the handle and pull the movable handle 8, so that the pawl 14 pushes the driving rod 5 forward through the ratchet bar 501. When the movable handle 8 is released and the reset button 7 is pulled backward, the reset button 7 first overcomes the pulling force of the traction spring 701 and pulls down the gate plate 6, that is, the top of the waist-shaped hole 601 of the gate plate 6 contacts the gate plate limiting column 503, and the gate plate 6 moves downward a certain distance relative to the driving rod 5. On the one hand, the gate plate 6 covers the ratchet bar 501, and on the other hand, it also applies an external force downward on the pawl 14, so that the pawl 14 rotates counterclockwise, and the pawl 14 is out of contact with the ratchet bar 501. At this time, the reset button shaft 702 contacts the rear wall of the reset button mounting hole 505. Continuing to pull the reset button backward will drive the driving rod 5 to move backward. In this process, the gate plate 6 has been covering the ratchet bar 501 until the reset button is released. The gate plate 6 is reset under the action of the traction spring. After the external force acting on the ratchet 14 disappears, the ratchet 14 is reset and rests against the ratchet bar again.

[0083] The main function of the trigger assembly of this embodiment is to apply a force to drive the driving rod 5 to move forward, while the retreat of the driving rod 5 depends on pulling back the reset button 7. It can be reasonably foreseen that the present invention drives the nail pusher rod and the nail magazine rod to move forward and backward through the driving rod 5. As long as the driving assembly can realize the forward and backward movement of the driving rod, it can be applied to the present invention. For example, the trigger assembly is replaced with a motor, and the motor realizes the migration and retreat of the driving rod. This embodiment can facilitate the operation of the surgical operator through the cooperation of the pawl 14 and the ratchet bar, and is relatively stable and has a simple structure.

[0084] like Figure 7 , 8 As shown in Figures 9, 10, 12, 13, 14, and 15, the extension assembly includes: an anvil rod 17, a stapler rod 16, a stapler push rod 15, and an unlocking rod 12, the rear ends of which are all located in the stapler housing 19, and along the direction from the left side to the right side of the stapler, they are the stapler push rod 15, the stapler magazine rod 16, and the anvil rod 17 in sequence. The anvil rod 17, the stapler magazine rod 16, and the stapler push rod 15 are all in the shape of long strips, and each rod is made of a material with strong rigidity (such as metal). The rear end of the anvil rod 17 is installed at the front end of the stapler body and cannot be moved. The front ends of the stapler push rod 15, the stapler magazine rod 16, and the anvil rod 17 are connected to the stapler push ring 3, the stapler magazine ring 2, and the anvil ring 1, respectively.

[0085] like Fig.12 ,13 As shown in FIGS. 14 and 15 , the rear end of the nail pusher rod 15 is connected to the front end of the driving rod 5, and the driving rod 5 drives the nail pusher rod 15 to move forward or backward together. The nail magazine rod 16 is also driven by the driving rod 5 to move forward or backward, but it is different from the nail pusher rod 15 in that: when the nail magazine rod 16 drives the nail magazine ring 2 and the nail anvil ring 1 to abut in place, the movable handle 8 is pulled at this time, and the driving rod 5 continues to drive the nail pusher rod 15 forward, but the driving rod 5 must be out of contact with the nail magazine rod 16, so that even if the driving rod 5 continues to move forward, the nail magazine rod 16 will not be driven forward by the driving rod. The present invention is realized by the limit button 4. Specifically, the rear end protrusion 1602 of the nail magazine rod at the tail end of the nail magazine rod 16 is in a convex shape, and the rear end protrusion 1602 of the nail magazine rod is placed in the accommodating cavity 508 at the front end of the driving rod 5, and the rod body of the nail magazine rod 16 passes through the gap between the upper protrusion 502 and the lower protrusion 504 of the driving rod 5. The inner end of the limit button 4 has a limit button end protrusion 403. The left side of the housing 19 is provided with a limit button moving groove 1903, which is a straight groove parallel to the reset button moving groove 1902. The outer end of the limit button 4 extends out of the housing from the limit button moving groove 1903, and the limit button operating portion 402 at the outer end is for the surgical operator to hold and operate the limit button 4, and the limit button end protrusion 403 of the limit button 4 is located in the accommodating cavity 508. When the limit button end protrusion 403 is located at the rear end of the nail magazine rod 16 and contacts the rear end of the nail magazine rod, at this time, the limit button end protrusion 403 and the rear end protrusion 1602 of the nail magazine rod fill the accommodating cavity 508 together, and the driving rod 5 pushes the magazine top rod 16 to move forward together with the help of the limit button end protrusion 403. When the staple cartridge ring 2 abuts against the staple anvil ring 1, the limit button 4 is pulled outward or pushed inward, so that the end projection 403 of the limit button is separated from the rear end protrusion 1602 of the staple cartridge rod. At this time, the driving rod 5 can no longer push the staple cartridge rod 16. Specifically, there is a distance between the rear wall of the receiving cavity 508 of the driving rod and the rear end protrusion 1602 of the staple cartridge rod. When the driving rod 5 continues to move forward, the rear wall of the receiving cavity 508 will not contact the rear end protrusion 1602 of the staple cartridge rod, and the driving rod 5 can no longer push the staple cartridge rod forward. This distance is enough for the staple pusher rod to continue to move forward, so that the staple pusher ring 3 pushes out the staples in the staple cartridge ring to anastomose the tissue ends together. When it is necessary to drive the staple cartridge rod to move backward, the driving rod 5 is pulled backward, and the upper and lower protrusions of the driving rod 5 contact the front end wall of the rear end protrusion 1602 of the staple cartridge rod, so that the staple cartridge rod can be driven to retreat.

[0086] In order to allow the surgical operator to intuitively see the moving stroke of the nail magazine rod and the nail pusher rod and the position reached during the operation, the present invention can also indicate the moving stroke by the cooperation of the limit button 4 and the limit button moving groove 1903, and the limit button moving groove 1903 is provided with a scale. The present invention closes the left side of the accommodating cavity 508, opens a avoidance hole on the left side wall, and the limit button 4 passes through the avoidance hole and enters the accommodating cavity. In this design, when the driving rod 5 moves, the limit button can move with the driving rod.

[0087] The present invention also designs another solution to achieve the synchronous movement of the limit button 4. A avoidance hole 1502 is opened at the rear end of the push rod 15, and the limit button 4 passes through the avoidance hole. When the driving rod drives the push rod 15 to move, the limit button 4 will move together with the push rod 15. The surgical operator can intuitively know how far the push rod 15 has moved through the movement distance of the limit button 4, and then know how far the push ring 3 has moved. Fig.13 The rear end of the nail pushing rod 15 of the present invention has a rear end protrusion 1501 of the nail pushing rod. The protrusion has a large area, and the avoidance hole 1502 can be more conveniently set on the rear end protrusion 1501 of the nail pushing rod. At the same time, Fig.13 The nail pushing rod 15 shown is detachably connected to the driving rod 5, that is, the rear end protrusion 1501 of the nail pushing rod is placed in the accommodating cavity 508, and the rear end protrusion 1501 of the nail pushing rod is in a convex shape, and the rod body of the nail pushing rod 15 passes through the gap between the upper protrusion 502 and the lower protrusion 504 of the driving rod 5. The rear wall of the rear end protrusion 1501 of the nail pushing rod contacts the rear wall of the accommodating cavity 508, and the driving rod can directly push the nail pushing rod forward; the nail pushing rod is pulled backward by the upper protrusion, the lower protrusion and the rear end protrusion of the nail pushing rod.

[0088] Combine the following Fig. 9 , 10 12-15, 17, 19 illustrate the arrangement and function of the unlocking lever 12. The staple magazine lever 16 is provided with a staple magazine lever elastic side wing 1601, Fig.10 As shown in FIG. 1 , a nail magazine rod elastic side wing 1601 is provided on each of the upper and lower surfaces of the nail magazine rod. Accordingly, at the front end of the housing 19, the inner wall of the housing 19 is provided with upper and lower rows of slots 1905 ( Fig.10 The upper slot is not shown in the figure). The nail magazine rod 16 is also provided with an unlocking pressure plate 1201, which is connected to the unlocking rod 12. Figure 13-15 , 17, the anvil rod 17 has a long hole arranged along the length direction, the unlocking pressure rod is located in the long hole, the rear end of the unlocking rod passes through the unlocking rod through hole 1701 and is connected to the unlocking pressure plate 1201. Figure 8As shown, the right side of the housing 19 is provided with an unlock button moving slot 1904. After the unlock button 13 passes through the unlock button moving slot 1904, it is connected to the rear end of the unlock rod 12 inside the housing. By holding the unlock button 13, the unlock rod is pushed forward or backward in the direction of the nail anvil ring. Fig.14 , 15 For easy operation, the present invention sets the unlocking button 13 at the rear end of the connecting rod 1202. The connecting rod is L-shaped. The front end of the connecting rod 1202 is upturned and connected to the unlocking rod 12. The connecting rod 1202 is also provided with a sliding seat 1203 at the rear end. The sliding seat 1203 is sleeved on the guide column 1205 and can move forward and backward along the guide column. The guide column 1205 is installed in the housing. Through the guidance of the guide column, the operation is more stable. The sliding seat, the unlocking button, and the connecting rod can be made in one piece, or they can be assembled together in a split structure.

[0089] Combination Fig. 9 , 10 The elastic side wings 1601 of the nail magazine rod are opened toward the rear end. When the driving rod 5 drives the nail magazine rod to move forward and the elastic side wings 1601 of the nail magazine rod reach the slot area, a "click" sound can be heard, so that the surgical operator can know the position of the nail magazine ring through the sound until it abuts against the anvil ring and the elastic side wings of the nail magazine rod are stuck in the slot to achieve the positioning of the nail magazine rod. Even if the driving plate moves backward, it is difficult to drive the nail magazine rod to move backward. When the unlocking button 13 is held backward to drive the unlocking rod 12 to retreat, the unlocking pressure plate gradually retreats and presses the elastic side wing 1601 of the nail magazine rod to make it contract, and the elastic side wing 1601 of the nail magazine rod is separated from the slot 1905, so that the driving rod 5 can retreat with the nail magazine rod; when the nail magazine rod needs to move forward again, the unlocking rod 12 is pushed forward, and the unlocking pressure plate 1201 is gradually separated from the elastic side wing 1601 of the nail magazine rod, and the elastic side wing 1601 of the nail magazine rod bounces open after losing the pressure of the unlocking pressure plate 1201, and after pushing the nail magazine rod forward until it reaches the position, the elastic side wing of the nail magazine rod is stuck in the slot 1905.

[0090] like Fig.15As shown, in the present invention, at both ends of the sliding seat 1203, the guide column 1205 is respectively provided with a second unlocking rod spring 1206 and a first unlocking rod spring 1204. After the unlocking button is released, the unlocking rod spring (1204, 1206) can drive the unlocking rod 12 to return to the initial position (that is, the unlocking pressure plate 1201 is located in front of the elastic side wing 1601 of the nail magazine rod and does not squeeze the elastic side wing of the nail magazine rod) to avoid misoperation. The operation in this case is different. When the driving rod drives the nail magazine to move forward, the elastic side wings of the nail magazine rod are open, and the surgical operator can hear a "click" sound until the elastic side wings of the nail magazine rod are stuck in the slot after reaching the specified position. The difference is: when the nail magazine rod needs to move backward, the unlocking pressure plate 1201 is pulled by the unlocking button 13 to squeeze the elastic side wings 1601 of the nail magazine rod (maintaining the squeezed state), and the driving rod 5 drives the nail magazine rod to move backward to the specified position, and then the unlocking button 13 is released. Under the action of the second unlocking rod spring 1206, the unlocking pressure plate 1201 is reset, and the elastic side wings of the nail magazine rod are opened. At this time, the nail magazine rod can be directly driven forward without pulling the unlocking button 13 to make the unlocking pressure plate 1203 release the elastic side wings of the nail magazine rod.

[0091] Fig.15 The unlocking pressure plate is frame-shaped, and can also be made into other shapes such as "[" shape, as long as it can press the elastic side wings of the nail magazine rod to shrink it. The unlocking pressure plate can be designed as an independent structure and installed on the unlocking pressure rod, or it can be an integrated structure with the unlocking rod.

[0092] The nail magazine rod, the nail pushing piece rod and the nail anvil rod are in the shape of long strips, the unlocking rod is also in the shape of long strips as a whole, and the rear end of the unlocking rod is in the shape of an arc.

[0093] Combination Fig.17 , 18 , Fig.17 The unlocking rod shown in FIG. 1 is inserted into the long hole of the anvil rod 17, and the long hole plays a guiding role. Fig.18 The unlocking rod is arranged outside the nail anvil rod, which can also realize the role of the unlocking rod; in order to stabilize the movement, a guide ring (not shown in the figure) can be arranged outside the nail anvil rod, and the unlocking rod passes through the guide ring. In addition, preferably, the guide ring is arranged along the length direction of the unlocking rod, which not only plays a guiding role, but also plays a role similar to the nail anvil rod, that is, when the unlocking rod moves in a limited space, the forward force applied to the unlocking rod is more easily converted into a force perpendicular to the direction of the rod body, thereby more effectively pushing the unlocking column.

[0094] like Figure 20-24 As shown, the execution assembly includes: an anvil ring 1, a staple cartridge ring 2, a staple pusher ring 3, and an annular blade 301, and the staple cartridge ring 2 is provided with anastomotic staples.

[0095] The nail anvil ring 1, the nail magazine ring 2, and the nail pusher ring 3 are all in the shape of a ring. The present invention designs them into a structure composed of two half-ring structures to form a ring. Fig. 20 , 21 22 are used to illustrate the splicing method of the two half rings and how to achieve the closure and opening of the ring. The nail magazine ring 2 includes a first half ring 203 and a second half ring 204. The nail magazine ring 2 is located on one side of the front end of the nail magazine rod. One end of the second half ring 204 is connected to the front end of the nail magazine rod 16, and the other end of the second half ring 204 is connected to one end of the first half ring 203. The first half ring 203 can rotate relative to the connection point. Fig.21 The connecting hinge 202 is shown, and the first half ring and the second half ring are connected by the connecting hinge 202. It is foreseeable that the connecting hinge 202 can also be replaced by a rotating shaft, such as Fig. 22 As shown, the connecting ends of the two half rings are provided with a shaft hole 1007, and the shaft can be rotated by installing it in the shaft hole. The present invention is provided with a nail magazine rod lock buckle 10, specifically, at one end of the second half ring 204 connected to the nail magazine rod, a female buckle 1002 is provided on the second half ring 204, and a male buckle 1001 is provided at the corresponding end of the first half ring 203, and the first half ring and the second half ring can be assembled into a nail magazine ring by buckling the male buckle 1001 into the female buckle 1002, and the lock between the two half rings can be released by pushing the male buckle 1001 out of the female buckle. The present invention has a through hole at the end of the second half ring 204 and the nail magazine rod, and an unlocking column 1004 is inserted into the through hole. The unlocking column is perpendicular to the length direction of the nail magazine rod, and the unlocking column 1004 is pushed toward the male buckle 1001, and the male buckle is pushed away from the female buckle by the unlocking column. The unlocking post 1004 is sleeved with an unlocking spring 1003. When the external force applied to the unlocking post disappears, the unlocking post is reset under the action of the unlocking spring 1003. The male buckle 1001 is preferably an elastic arm made of elastic material. Fig.21 , 22 It can be seen that the staple cartridge ring is provided with inner and outer layers of staples 201. The ends of the two half rings are both L-shaped. In the splicing part, one half ring is thicker and the other is thinner, so that staples can be set in the thicker part, so that there are also staples in the splicing part, avoiding the problem of missing staples during anastomosis. The staples can have different heights and lengths, and can be non-absorbable metal staples or absorbable staples, which can be configured according to needs.

[0096] The end of the second half ring 204 can be integrally formed with the staple cartridge rod 16, or a split installation structure can be used. Fig. 22As shown, the end of the second half ring 204 is provided with a ring mounting seat 206, and the ring mounting seat 206 is inserted into the through hole on the stapler rod 16, and then fastened with a screw. The unlocking column is inserted into the through hole of the ring mounting seat 206. Since the operation has a high requirement for disinfection, the stapler is a disposable consumable device with a high cost. The present invention separates the stapler ring, the stapler pusher ring, and the stapler anvil ring from the stapler body (including the stapler rod, the stapler pusher rod, and the stapler anvil rod) by designing a split installation structure, and the stapler ring, the stapler pusher ring, and the stapler anvil ring are used as disposable consumable devices, and the others can continue to be disinfected and used, which greatly saves costs and reduces surgical costs.

[0097] Fig.23 Another structure of a male buckle and a female buckle is shown. A male buckle groove 1006 is provided at the end of the first half ring 203. The male buckle 1001 is a sphere, which is installed in the male buckle groove 1006 through an outward push spring 1005. A part of the sphere is exposed outside the male buckle groove. The exposed part of the sphere is buckled into the female buckle 1002 to achieve splicing and locking. The unlocking column 1004 is used to push the sphere out of the female buckle to achieve separation.

[0098] Fig.24 Another structure of male buckle and female buckle is shown. A hook-shaped male buckle 1001 is provided on the first half ring 203, and a hook-shaped female buckle 1002 is provided on the second half ring 204. The two hook-shaped structures are used to achieve locking, and the unlocking column is used to push the female buckle 1002 outward to achieve separation. The female buckle 1002 is preferably made of elastic material.

[0099] The above schematically illustrates three structural forms of male buckles and female buckles. Other applicable structural forms that realize the locking of two half rings and can be unlocked by means of an unlocking column can also be applied to the present invention. For example, the push-out spring and the ball shown in FIG. 23 are replaced with a latch, the latch is inserted into the female buckle to achieve locking, and the unlocking column pushes the latch out of the female buckle to unlock the locking.

[0100] The anvil ring and the nail pusher ring are also formed by two half rings. Except for the absence of staples, the other structures are basically the same as the staple magazine ring. They are provided with an anvil rod lock buckle 9 (including a male buckle 901 and a female buckle 902) and a nail pusher rod lock buckle 11 (including a male buckle 1101 and a female buckle 1102). One end of each half ring of the anvil ring and the nail pusher ring is connected to the anvil rod and the nail pusher rod respectively. Fig. 27 , the staple cartridge ring 2 is located between the staple 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 surgical operator), and the staple anvil ring 1 is located at the distal end (i.e., far from the surgical operator). The staple pusher ring 3 and the staple anvil ring 1 are respectively provided with staple pusher plates 304 and staple anvils (not shown in the figure) corresponding to the staples on the staple cartridge ring 2, and the staple pusher ring 3 is also provided with an annular blade 301, which is located at the outer edge of the staple pusher plate 304. The use of the staple pusher plate, the staple anvil and the staples is a conventional technique and will not be described in detail.

[0101] Combination Fig. 20 , 27 28. The second half ring 104 of the anvil ring 1 is connected to the anvil rod 17. An anvil guard plate 101 is provided at the end of the second half ring 104 or on the anvil rod 17. The anvil guard plate 101 is located on the outer side of the anvil ring (the inner side is close to the nail magazine ring). When the first half ring 103 and the second half ring 104 are spliced ​​and locked, the splicing part is blocked by the anvil guard plate 101. Fig. 20 , 26 At the connection between the push nail ring 3 and the push nail rod 15, a push nail ring guard plate 302 is provided at the end of the push nail ring or on the push nail rod. The push nail ring guard plate 302 is located on the outside of the push nail ring (the inner side is close to the nail magazine ring). When the two half rings are spliced ​​and locked, the splicing is blocked by the push nail ring guard plate 302. Fig.26 , 27 29. During the anastomosis operation, the intestinal ends are turned outward, the staple cartridge ring 2 abuts against the anvil ring 1, and then the staple pusher ring 3 is pushed. The staple pusher pushes the staples to anastomose the two intestinal ends. At the same time, the annular blade cuts off the excess tissue that is turned outward. Tissue grooves (not shown in the figure) are reserved in the anvil ring, the staple cartridge ring, and the nail cartridge rod near the anvil rod. The excised tissue falls into the tissue grooves. In the process of pushing the staple pusher ring, due to the presence of the staple pusher ring guard, the force applied to the staple pusher rod 17 can be transmitted to the first half ring (i.e., Fig. 20 The nail pusher ring is evenly stressed as a whole, thus avoiding the first half ring from having insufficient thrust. The nail anvil guard plate 101 blocks the joint of the nail anvil ring from the outside, thus avoiding the male buckle and the female buckle from being separated under the action of external force, thus ensuring the overall stress of the nail anvil ring. The guard plate can be made of metal or other hard materials.

[0102] Combine the following Fig.15 , 17 , 19 to illustrate how the present invention achieves unlocking of the lock catch through the unlocking rod 12. Since the unlocking rod is located in the anvil rod 17, the unlocking posts corresponding to the anvil ring, the magazine ring, and the nail pusher ring must pass through the corresponding rod bodies to enter the anvil rod. Specifically, the unlocking post on the anvil ring 1 passes through the hole on the anvil rod to enter the anvil rod, the unlocking post on the magazine ring 2 passes through the magazine rod and then passes through the avoidance groove on the anvil rod to enter the anvil rod, and the unlocking post of the nail pusher ring 3 passes through the nail pusher rod 15, passes through the avoidance groove 205 on the magazine rod 16, and then passes through the avoidance groove on the anvil rod to enter the anvil rod. Fig.17 The unlocking rod shown in the figure has not yet been pushed to the end of the nail anvil rod (the ring shown in the figure is open, which is actually the case during the surgical operation). Fig.26 When the unlocking lever is pushed to Fig.19In the position shown, the unlocking rod 12 pushes the unlocking posts of the nail pusher ring, the nail magazine ring, and the nail anvil ring from the nail anvil rod to the nail pusher rod, and the unlocking posts will unlock the male buckle and the female buckle in the manner described above. Fig.18 As shown, the unlocking rod 12 is entirely located outside the anvil rod. Accordingly, the unlocking posts corresponding to the anvil ring, the nail magazine ring, and the nail pusher ring must all pass through the anvil ring before they can be pushed by the unlocking rod 12.

[0103] Since there is relative displacement between the nail pusher rod and the nail magazine rod, and between the nail pusher rod, the nail magazine rod and the nail anvil rod along the length direction of the rod body, when the unlocking post of the nail pusher rod passes through the nail magazine rod, enters or passes through the nail anvil rod, and the unlocking post of the nail magazine rod enters or passes through the nail anvil rod, it is necessary to provide a avoiding groove (such as a groove) extending along the length direction of the rod body on the nail magazine rod and the nail anvil rod. Fig.15 The avoidance groove 205) in the nail pushing plate ring and the unlocking column of the nail magazine ring are not obstructed.

[0104] like Fig.25 As shown, from left to right are the unlocking columns corresponding to the nail pusher ring, the nail magazine ring, and the nail anvil ring. In order to facilitate the unlocking rod to be pushed to the end of each unlocking column smoothly, the present invention connects the three unlocking columns through a connecting plate 1702. The end of 1702 is provided with an inclined surface. The unlocking rod is inserted into the bottom of the connecting plate 1702 through the inclined surface, so that the unlocking column can be easily squeezed and pushed.

[0105] The unlocking lever of the present invention is used to open the lock on the nail magazine ring and the like on the one hand, and to drive the unlocking pressure plate to retract the elastic flank of the nail magazine rod on the other hand, so as to drive the nail magazine rod to retreat. Only one unlocking button is needed, and the structure is simple. Obviously, two unlocking buttons can also be provided, one of which is connected to the unlocking lever and the other is directly connected to the unlocking pressure plate, and the unlocking lever and the unlocking pressure plate are driven respectively by the two unlocking buttons.

[0106] In the above example, the nail pusher rod is on the left, the nail anvil rod is on the right, the limit button is on the left, and the unlocking button is on the right. This is just an example. The positions of the nail pusher rod, the nail anvil rod, the limit button, and the unlocking button can be adjusted. The limit button and the unlocking button can also be set on the same side. Technical personnel in this field can make adjustments as needed.

[0107] The following is a detailed description of the method of using the present invention.

[0108] When the stapler of the present invention is in an initial state, the anvil ring 1, the cartridge ring 2, and the staple pusher ring 3 are perpendicular to the corresponding rod body; the anvil ring 1, the cartridge ring 2, and the staple pusher ring 3 are all in an open-loop state, the anvil rod lock buckle 9, the cartridge rod lock buckle 10, and the staple pusher rod lock buckle 11 are not locked, and the male buckles 901, 1001, and 1101 are separated from the female buckles 902, 1002, and 1102 (such as Fig. 20As shown in the figure, the unlocking springs 903, 1003, 1103 are in the original straight state, so that the unlocking posts 904, 1004, 1104 are in the built-in pop-up state, and the end of the unlocking post is located in the anvil rod (if the unlocking rod is not set in the anvil rod, the end passes through the anvil rod). The nail magazine ring 2 and the nail pusher ring 3 are close together and keep a distance of 4-5cm from the anvil ring 1 (as shown in the figure). Fig. 9 ). The unlocking rod 12 is in a retracted state, and the unlocking button 13 is in the middle position of the unlocking button moving groove 1904. The limit button 4 is fixed to the proximal end of the limit button moving groove 1903 by a safety bolt (not shown in the figure), and the limit button end protrusion 403 of the limit button 4 abuts against the pushing surface 1603 of the nail magazine rod 16, and the driving rod 5 can drive the nail magazine rod and the nail pushing sheet rod at the same time. The reset button 7 is at the proximal end of the reset button moving groove 1902, and the traction spring pulls the gate plate 6. The ratchet 501 below the driving rod 5 is exposed to the outside, and the ratchet 14 is engaged with the ratchet 501.

[0109] The following is an example of intestinal anastomosis, but it is not limited to the intestine and can be applied to any hollow organ and scene that can be anastomosed externally. Remove the excess soft tissue around the two ends of the intestine, and suture 2-4 traction lines at the edges of the ends respectively; remove the stapler, the stapler is in the initial state, find a suitable surgical anastomosis site, insert the male buckles 901, 1001, and 1101 into the female buckles B902, 1002, and 1102 respectively to lock into a ring. The traction line of the distal end of the lifting stapler is inserted from the outside to the inside by the nail anvil ring 1, and the intestinal end at the distal end is everted, and it is fixed to the inside of the nail anvil ring 1; similarly, the traction line of the proximal end of the lifting stapler is inserted from the outside to the inside by the nail pusher ring 3 and the nail magazine ring 2 in turn, and the intestinal end at the proximal end is everted, and it is fixed to the inside of the nail magazine ring 2. After the two ends are aligned, the movable handle 8 is pulled, and the ratchet 14 pushes the ratchet 501 of the driving rod 5, thereby pushing the driving rod forward, and the driving rod 5 drives the nail magazine rod and the nail pushing piece rod to move forward together; at this time, the nail pushing piece rod 15 and the nail magazine rod 16 respectively drive the nail pushing piece ring 3, the annular blade 301 and the nail magazine ring 2 to move forward, and at the same time drive the intestinal end turned outward on the nail magazine ring to abut against the intestinal end turned outward on the nail anvil ring. During the process of the driving rod driving the staple cartridge rod and the staple pusher rod to move forward, when the elastic wing 1601 of the staple cartridge rod reaches the area where the slot is located, the two ends are close, and the elastic wing 1601 of the staple cartridge rod is buckled into the slot 1905 of the stapler body. The surgical operator can choose the distance to drive the staple cartridge rod 16 to continue moving forward according to the thickness of the tissue to be stapled. As the elastic wing 1601 of the staple cartridge rod moves, one or more "click" sounds can be heard at this time until the two sides are tightly attached (Note: The surgeon needs to control the tension and pressure of the stapled tissue according to the actual scene to prevent excessive tissue tension or pressure from causing necrosis of the anastomotic tissue, or insufficient subsequent cutting and staple effect due to excessive tissue distance). At this time, the limit button 4 indicates the distal end of the limit button moving slot 1903, and the surgical operator can also judge whether the tissue is in place according to the scale of the limit button moving slot 1903. After the tissue is in place, stop pressing the movable handle 8. Confirm that the two ends of the intestine are located between the anvil ring 1 and the stapler ring 2, and are well aligned and ready for anastomosis.

[0110] When checking the two ends of the intestine before anastomosis, if it is found that the tissue alignment between the anvil ring 1 and the staple cartridge ring 2 is poor or partially detached, it is necessary to readjust the tissue alignment. The specific operation is to pull the unlock button 13 back toward the proximal end to drive the unlock rod 12 to move toward the proximal end. When the unlock button 13 is pulled back to a certain range of scales corresponding to the unlock button moving slot 1904, the unlock rod 12 has driven the unlocking pressure plate 1201 to retreat to the elastic side wing 1601 of the staple cartridge rod, and the elastic side wing 1601 of the staple cartridge rod is compressed, and the elastic side wing 1601 of the staple cartridge rod is no longer engaged with the slot, and the restricted movement of the staple cartridge rod 16 is released. At this time, pull back the reset button 7, 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 501 below the drive rod 5, the pawl and the ratchet 501 are no longer engaged, continue to pull back the reset button 7 to drive the drive rod 5 to retreat, the drive rod 5 drives the nail pusher rod 15 and the nail magazine rod 16, and then drives the nail pusher ring 3 and the nail magazine ring 2 to move to the appropriate position proximally. Adjust the tissue alignment between the anvil ring 1 and the nail magazine ring 2, and when the two ends are perfectly aligned, release the unlocking button 13, and the unlocking rod 12 returns to its original position under the action of the second unlocking spring 1206 (at this time, the unlocking rod drives the unlocking pressure plate forward, and the unlocking pressure plate is disengaged from the elastic side wing of the nail magazine rod. If the second unlocking spring is not set, it is necessary to manually push the unlocking button 13 forward to drive the unlocking pressure plate to disengage from the elastic side wing of the nail magazine rod through the unlocking rod). Then pull the movable handle 8 until the two ends of the tissue are in place and wait for anastomosis.

[0111] When the staple cartridge ring and the staple anvil ring are in the state of waiting for anastomosis, the staple cartridge ring can no longer move (at the same time, the elastic flank of the staple cartridge rod is engaged with the slot, the staple cartridge rod is very stable, the relative position of the staple anvil ring 1 and the staple cartridge ring 2 is kept fixed, and the two opposing broken end tissues will not relax). Remove the safety bolt, push the limit button 4 inward, so that the end projection 403 of the limit button is disengaged from the push surface 1603 of the staple cartridge rod. At this time, the drive rod is disengaged from the staple cartridge rod, and the drive rod can no longer drive the staple cartridge rod forward when it moves forward. Then pull the movable handle 8, and the drive rod 5 drives the staple pusher rod 15 to move forward. The staple pusher rod 15 drives the staple pusher ring 3 and the annular blade 301 to move forward. At this time, the staple pusher ring guard plate 302 will ensure that the two half rings of the staple pusher ring 3 are in the same plane and enhance the anastomosis strength. The staple pusher on the staple pusher ring pushes the staple to move toward the anvil ring 1 and puncture the tissue, and the staple is formed. The anvil guard plate 101 ensures that the two half rings of the anvil ring 1 are in the same plane and strengthens the fit strength (such as Fig.28 As shown), the annular blade 301 removes excess tissue around the anastomosis.

[0112] Release the movable handle 8, push the unlock button 13 forward, drive the unlock rod 12 to move forward, the unlock rod 12 squeezes the unlock column 904, 1004, 1104, and the unlock column squeezes the male buckle 901, 1001, 1101 to separate it from the female buckle 902, 1002, 1102, so as to open the nail anvil ring, nail magazine ring, and nail pusher ring. By surgically rotating the rotatable half ring of the nail anvil ring 1, nail magazine ring 2, and nail pusher ring 3, the nail anvil ring, nail magazine ring, and nail pusher ring can be smoothly moved away from the connected intestine, and the stapler can be taken out from the anastomotic opening to complete the cutting and anastomosis.

Claims

1. A stapler, comprising a housing, characterized in that: It also includes a nail magazine rod, a nail pushing rod, and a nail anvil rod, wherein the nail magazine rod is located between the nail pushing rod and the nail anvil rod, and the front ends of the nail magazine rod, the nail pushing rod, and the nail anvil rod are respectively installed with a nail magazine ring, a nail pushing rod, and a nail anvil ring, and the rear end of the nail anvil rod is fixedly installed in the shell, and the rear ends of the nail pushing rod and the nail magazine rod are movably installed in the shell and can move forward and backward along the length direction of the rod body; At the rear end of the nail magazine rod, the nail magazine rod is provided with elastic side wings of the nail magazine rod, and the elastic side wings of the nail magazine rod are opened rearwardly; in front of the elastic side wings of the nail magazine rod, the nail magazine rod is provided with an unlocking pressure plate that can move forward and backward along the nail magazine rod; the front end of the shell is internally provided with a slot that cooperates with the elastic side wings of the nail magazine rod, when the unlocking pressure plate moves to the elastic side wings of the nail magazine rod, the elastic side wings of the nail magazine rod are contracted, and when the unlocking pressure plate moves away from the elastic side wings of the nail magazine rod to the distal end, the elastic side wings of the nail magazine rod engage with the slot.

2. The stapler according to claim 1, characterized in that: A driving rod that can move forward and backward is arranged in the shell, and the driving rod is connected to the rear end of the nail pushing rod; the front end of the driving rod is a double fork arm structure, and the rear end of the nail magazine rod has a convex-shaped rear end protrusion of the nail magazine rod, and the rear end protrusion of the nail magazine rod is located in the accommodating cavity of the double fork arm structure, and the rod body of the nail magazine rod passes through the gap between the upper protrusion and the lower protrusion of the double fork arm structure; a limit button is also arranged on the shell, and the limit button has a limit button end protrusion, and the limit button end protrusion extends into the accommodating cavity; the limit button can be moved along its length direction, and when the limit button end protrusion is located between the rear wall of the accommodating cavity and the rear end protrusion of the nail magazine rod, the driving rod can drive the nail magazine rod to move forward.

3. The stapler according to claim 2, characterized in that: The rear end of the nail pushing rod has a rear end protrusion of the nail pushing rod in a convex shape, the rear end protrusion of the nail pushing rod is located in the accommodating cavity and contacts the front wall and the rear wall of the accommodating cavity, and the rod body of the nail pushing rod passes through the gap between the upper protrusion and the lower protrusion of the double fork arm structure; the outer shell is provided with a limit button moving groove extending along the length direction of the rod body, and the end protrusion of the limit button passes through the limit button moving groove and the through hole on the rear end protrusion of the nail pushing rod to enter the accommodating cavity.

4. The stapler according to claim 3, characterized in that: The limit button moving groove is provided with a scale.

5. The stapler according to claim 1, characterized in that: The nail pushing ring, nail magazine ring and nail anvil ring all include a first half ring and a second half ring; the hinged ends of the first half ring and the second half ring are rotatably connected, and the fixed ends of the second half rings of the nail pushing ring, the nail magazine ring and the nail anvil ring are respectively connected to the front ends of the nail pushing rod, the nail magazine rod and the nail anvil rod; the rear end of the nail anvil rod is fixedly installed in the shell, and the rear ends of the nail pushing rod and the nail magazine rod are movably installed in the shell and can move forward and backward along the length direction of the rod body; the nail pushing ring, the nail magazine ring and the nail anvil ring are all provided with a lock that locks the free end of the first half ring to the fixed end of the second half ring, and also include an unlocking rod, when the unlocking rod is pushed forward along the length direction of the rod body, the unlocking rod opens the lock; the rear end of the unlocking rod is connected to the unlocking pressure plate.

6. The stapler according to claim 5, characterized in that: The lock buckle comprises a male buckle and a female buckle, a male buckle is arranged on the free end of the first half ring, and a female buckle is arranged on the fixed end of the second half ring, and a ring structure is formed when the male buckle and the female buckle are locked; an unlocking column perpendicular to the length direction of the rod body is arranged in the second half ring; the unlocking rod is located on the outer side of the anvil rod, and the unlocking columns of the nail pushing plate ring, the nail magazine ring and the nail anvil ring respectively pass through the nail anvil rod and extend out of the nail anvil rod, or the unlocking rod is arranged in the nail anvil rod, and the rear end of the unlocking rod is located outside the nail anvil rod, and the unlocking columns of the nail pushing plate ring, the nail magazine ring and the nail anvil ring respectively extend into the nail anvil rod; the nail magazine rod is provided with an avoidance groove for the unlocking column of the nail pushing plate rod to move along the length direction of the rod body, and the nail anvil rod is provided with an avoidance groove for the unlocking column of the nail pushing plate rod and the nail magazine rod to move along the length direction of the rod body; when the unlocking rod is pushed forward, the unlocking rod pushes the unlocking column to move in the direction away from the nail anvil rod, thereby opening the lock of the male buckle and the female buckle through the unlocking column.

7. The stapler according to claim 6, characterized in that: The male buckle is an elastic arm, the female buckle is a groove, and the unlocking column pushes the elastic arm out of the groove to open the lock.

8. The stapler according to claim 6, characterized in that: The free end of the first half ring is provided with a male buckle groove, the male buckle is a sphere, and the sphere is arranged in the male buckle groove through an outward push spring, the female buckle is a groove, and the unlocking column pushes the sphere out of the groove to open the lock.

9. The stapler according to claim 6, characterized in that: The male buckle and the female buckle are both hook-shaped, the hook-shaped male buckle is hooked with the hook-shaped female buckle to form a lock, and the unlocking column lifts the hook-shaped female buckle to open the lock.

10. The stapler according to claim 6, characterized in that: An unlocking spring is sleeved on the unlocking column.

11. The stapler according to any one of claims 5 to 10, characterized in that: The shell is provided with an unlocking button moving groove extending along the length direction of the rod body, and also includes an unlocking button extending out of the shell from the unlocking button moving groove, and the inner end of the unlocking button is connected to the unlocking rod.

12. The stapler according to claim 11, characterized in that: It also includes a connecting rod, a guide column arranged along the length direction of the rod body is installed in the outer shell, a sliding seat at the rear end of the connecting rod can be slidably installed on the guide column, the front end of the connecting rod is connected to the rear end of the unlocking rod, and the inner end of the unlocking button is connected to the connecting rod.

13. The stapler according to claim 12, characterized in that: On both sides of the sliding seat, the guide columns are respectively sleeved with a first unlocking lever spring and a second unlocking lever spring.

14. The stapler according to any one of claims 1 to 10, characterized in that: The elastic side wings of the nail magazine rod are arranged on the upper and lower surfaces of the nail magazine rod, and the unlocking pressure plate is frame-shaped or "["-shaped.

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