A rotatable continuous-firing anal fistula stapler

Abstract

The utility model relates to a rotatable and continuous firing anal fistula anastomat, which comprises an outer sleeve, a push tube, a handle assembly, anastomat nails and a plurality of guiding blocks. The push tube is arranged in the outer sleeve, the rear end of the push tube extends out of the outer sleeve and is provided with a bevel gear, and a flat groove is formed in the push tube. The handle assembly is provided with a trigger and a one-way clutch gear mechanism. The anastomat nails comprise a screw and a pair of guiding blocks, and the two guiding blocks are arranged on the rear side of the screw. A plurality of anastomat nails are arranged in the push tube. When the trigger is pulled to rotate forward, the trigger drives the push tube and each anastomat nail to rotate forward, and the anastomat nail moves forward along the spiral feeding channel through the guiding block. When the trigger is reset to rotate reversely, the trigger drives the one-way clutch gear mechanism to enter a separated state, so that the trigger cannot drive the bevel gear. The anastomat can be preloaded with a plurality of anastomat nails, the anastomat nails can be continuously fired, and one anastomat can treat and block a plurality of fistulas.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a rotatable, continuously firing anal fistula stapler. Background Technology

[0002] Currently, the main clinical treatment for anal fistulas is surgery, including fistula incision, fistula seton placement, and sphincter preservation. Surgical techniques are gradually shifting from more invasive open surgery to minimally invasive surgery, and from incision surgery to restorative surgery. However, for complex anal fistulas, there are still no good solutions or corresponding medical devices to address clinical challenges such as postoperative recurrence and slow healing.

[0003] Existing fistula occluders are not flexible enough in use, cannot be quickly aligned with the fistula opening, and can only deliver a occluding pin at a time. If a patient has several fistula openings, multiple fistula occluders may be required, which increases the complexity of the surgery.

[0004] Secondly, most of the sealing nails nowadays are made of non-absorbable materials. For example, when closing the internal opening of an anal fistula, stainless steel nails or titanium alloy nails are used to anastomose the internal opening of the anal fistula. After the operation, patients will experience a foreign body sensation when defecating, and a second operation is required to remove the closure device, which increases the patient's pain and surgical risks, and causes significant psychological trauma to the patient. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a rotatable and continuously firing anal fistula stapler, which solves the technical problems of the previous anal fistula occluder being inconvenient to operate and only able to output one occluder at a time, resulting in low surgical efficiency.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] First aspect:

[0008] A rotatable, continuously firing anal fistula stapler is provided, comprising:

[0009] The outer tube is connected to the handle assembly at its rear end and has a nail storage cavity at its front end, in which a spiral feeding channel is formed.

[0010] A push tube is inserted inside an outer tube. The rear end of the push tube extends from the outer tube and is equipped with a bevel gear. The front end of the push tube is provided with a push section, which is located inside the nail storage cavity. A flat square groove is formed on the push section.

[0011] A handle assembly, wherein a trigger and a one-way clutch gear mechanism are provided within the handle assembly, the trigger is configured to rotate, and an arc-shaped toothed portion is provided on the trigger, and the gear clutch mechanism is connected to the arc-shaped toothed portion and a bevel gear respectively;

[0012] An anastomotic stapler, comprising a screw and a pair of guide blocks, the two guide blocks being disposed on the rear side of the screw;

[0013] Multiple matching pins are placed inside the pushing section. Guide blocks on both sides of the matching pins extend from the flat square groove and are engaged in the spiral feeding channel. When the trigger is pulled to rotate forward, the arc-shaped teeth of the trigger drive the push tube and each matching pin to rotate forward via a one-way clutch gear mechanism and a bevel gear. The matching pins move towards the front end along the spiral feeding channel via the guide blocks. When the trigger rotates in the reverse direction to reset, the arc-shaped teeth of the trigger drive the one-way clutch gear mechanism to enter the disengaged state, so that the trigger cannot drive the bevel gear.

[0014] Furthermore, the one-way clutch gear mechanism includes

[0015] A rotating wheel is mounted within the handle assembly via a rotating shaft. The rotating wheel has axial movement space on the rotating shaft. A ring of transmission teeth is provided on one end face of the rotating wheel, and the transmission teeth mesh with a bevel gear. A positioning groove and an arc-shaped guide groove are formed on the end face of the rotating wheel. The bottom surface of the arc-shaped guide groove is an inclined surface, with its lower end connected to the positioning groove and its upper end connected to the end face of the rotating wheel. A ring of one-way teeth is provided on the other end face of the rotating wheel, and the one-way teeth cooperate with a spring plate.

[0016] An intermediate tooth is fitted onto a rotating shaft. The intermediate tooth includes a gear section, an end plate, and a locking block. The end plate is disposed on one side of the gear section, and the locking block is fixed on the end plate. The gear section engages with the arc-shaped tooth section of the trigger, and the locking block engages with the positioning groove.

[0017] A spring plate, one end of which is connected to the handle assembly, and the other end of which forms a spring plate, the spring plate engaging with a one-way tooth to restrict the wheel from rotating in the opposite direction;

[0018] When the trigger drives the intermediate tooth to rotate in the forward direction via the arc-shaped toothed part, the intermediate tooth drives the rotating wheel to rotate in the forward direction via the locking block, and the rotating wheel drives the push tube to rotate in the forward direction via the transmission tooth and bevel gear;

[0019] When the trigger drives the intermediate tooth to rotate in the opposite direction via the arc-shaped tooth, the locking block of the intermediate tooth moves along the arc-shaped guide groove to the end face of the rotating wheel, thereby driving the rotating wheel to move axially and compressing the spring piece axially. When the trigger reset ends, the locking block of the intermediate tooth rotates one revolution in the opposite direction along the end face of the rotating wheel and enters the positioning groove. At this time, the rotating wheel performs axial reset under the action of the spring piece's axial elastic force.

[0020] Furthermore, a threaded tube is provided inside the nail storage cavity, and a spiral feeding channel is formed inside the threaded tube;

[0021] An inner sleeve is provided inside the outer sleeve, and the inner sleeve is located behind the threaded tube.

[0022] Furthermore, the front end of the outer sleeve is bent at an angle of less than 15°;

[0023] The push tube is bent at the same angle inside the outer tube;

[0024] Sufficient radial clearance is provided between the push tube and the outer tube to allow the push tube to rotate within the outer tube.

[0025] Furthermore, a rotating head is provided at the front end of the handle assembly, and the outer sleeve is engaged with the rotating head so that the rotating head drives the outer sleeve to rotate.

[0026] Furthermore, the card block is provided with a guide slope, the guide slope faces the arc-shaped guide groove, and the card block slides from the positioning groove to the arc-shaped guide groove via the arc-shaped guide groove.

[0027] Furthermore, the spring sheet includes

[0028] The mounting plate and the spring are in the same plane. The mounting plate is fixedly connected to the handle assembly. One end of the spring is connected to the mounting plate, and the other end of the spring is bent to form a pressure plate. The pressure plate is adapted to abut against the one-way tooth.

[0029] Furthermore, the screw includes a nail body and a spiral blade, the nail body has a conical structure, the spiral blade is disposed on the nail body, and two guide blocks are installed at the large-diameter end of the nail body.

[0030] Furthermore, the staples are made of biodegradable materials and have a drug coating.

[0031] The second aspect:

[0032] A method for using an anal fistula stapler, employing the aforementioned rotatable, continuously firing anal fistula stapler, includes the following steps:

[0033] Pull the trigger handle to make it rotate forward. The trigger drives the middle tooth to rotate forward via the arc-shaped tooth. The middle tooth drives the rotating wheel to rotate forward via the locking block. The rotating wheel drives the bevel gear to rotate via the transmission tooth, thereby driving the push tube to rotate. The push tube drives the matching pin to rotate. The matching pin moves towards the front end along the spiral feeding channel via two guide blocks.

[0034] When the trigger is released, it rotates in the reverse direction to reset. The trigger drives the intermediate tooth and the locking block to rotate in the opposite direction. The locking block moves along the arc-shaped guide groove to the end face of the rotating wheel, thereby driving the rotating wheel to move axially and axially compressing the spring. When the trigger reset is finished, the locking block of the intermediate tooth has just rotated one revolution in the opposite direction along the end face of the rotating wheel and entered the positioning groove. At this time, the rotating wheel performs axial reset under the action of the spring force. The transmission teeth of the rotating wheel continue to mesh with the bevel gear. Pull the trigger again, so that the matching pin continues to move forward.

[0035] Repeat this process several times until the entire anastomotic staple is inserted into the internal opening of the anal fistula.

[0036] The beneficial effects of this utility model are:

[0037] This invention provides a rotatable, continuously firing anal fistula stapler and its method of use. The stapler can be pre-loaded with multiple staples, which can be fired continuously. One stapler can treat and seal multiple fistula openings.

[0038] The anastomosis device has an angled front end and can rotate 360 ​​degrees inside the anus, allowing for convenient, flexible, fast, and accurate treatment and sealing of fistulas in different locations.

[0039] The anastomotic staples are made of biodegradable and absorbable materials with a drug-coated finish. They exhibit excellent biodegradability and biocompatibility, completely degrading and disappearing from the body within 6 months of implantation, eliminating the need for a second surgery. The drug-coated staples improve microcirculation at the implantation site, reduce edema, accelerate tissue repair, decrease friction between the staples and tissues, reduce the patient's foreign body sensation, enhance the biocompatibility of the staples with human tissues, and reduce rejection reactions, thereby achieving the therapeutic goal of sealing the internal opening of the anal fistula. Attached Figure Description

[0040] The present invention will be further described below with reference to the accompanying drawings.

[0041] Figure 1 This is a top view of the rotatable, continuously firing anal fistula stapler of this utility model;

[0042] Figure 2 This is a front view of the rotatable, continuously firing anal fistula stapler of this utility model;

[0043] Figure 3 This is a schematic diagram of the push tube;

[0044] Figure 4 This is a schematic diagram of a one-way clutch gear mechanism;

[0045] Figure 5 This is a schematic diagram of the rotating wheel;

[0046] Figure 6 It is the middle tooth

[0047] Figure 7 It is a spring sheet

[0048] Figure 8 This is a structural diagram of the trigger and one-way clutch gear mechanism;

[0049] Figure 9 and Figure 10 This is a diagram of anastomotic staples;

[0050] Figure 11This is a diagram showing the operational state of the rotatable, continuously firing anal fistula stapler of this utility model;

[0051] in,

[0052] 1. Handle assembly; 11. Rotating head;

[0053] 2. Trigger; 21. Arc-shaped teeth;

[0054] 31. Outer sleeve; 32. Inner sleeve; 33. Threaded pipe;

[0055] 4. Push tube; 41. Flat square groove; 42. Bevel gear;

[0056] 5. Rotary wheel; 51. Transmission gear; 52. Positioning groove; 53. Arc-shaped guide groove; 54. One-way gear.

[0057] 6. Intermediate tooth; 61. Gear section; 62. End plate; 63. Locking block; 64. Guide slope;

[0058] 7. Spring sheet; 71. Mounting plate; 72. Spring piece; 73. Pressure plate;

[0059] 8. Anastomotic staples; 81. Screws; 82. Guide blocks. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] This application provides a rotatable, continuously firing anal fistula stapler, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0062] To address the technical problems of inconvenient operation and low surgical efficiency caused by the limited output of only one sealing pin in existing anal fistula occluders, one embodiment of this application provides a rotatable, continuously firing anal fistula stapler. This is described in detail below.

[0063] like Figures 1 to 10 As shown, a rotatable, continuously firing anal fistula stapler includes an outer sleeve 31, a push tube 4, a handle assembly 1, and a staple 8.

[0064] The rear end of the outer tube 31 is connected to the handle assembly 1, and its front end is provided with a nail storage cavity, in which a spiral feeding channel is formed;

[0065] The push tube 4 is inserted inside the outer tube 31. The rear end of the push tube 4 extends out of the outer tube 31 and is fitted with a bevel gear 42. The front end of the push tube 4 is provided with a pushing section. The pushing section is located inside the nail storage cavity. A flat square groove 41 is opened on the pushing section.

[0066] A handle assembly 1 is provided, wherein a trigger 2 and a one-way clutch gear mechanism are provided inside the handle assembly 1. The trigger 2 is configured to rotate and is provided with an arc-shaped toothed part 21. The gear clutch mechanism is connected to the arc-shaped toothed part 21 and the bevel gear 42 respectively.

[0067] The anastomotic staple 8 includes a screw 81 and a pair of guide blocks 82, with the two guide blocks 82 disposed on the rear side of the screw 81;

[0068] Multiple matching pins 8 can be pre-placed in the pushing section. Guide blocks 82 on both sides of the matching pins 8 extend from the flat groove 41 and are inserted into the spiral feeding channel. When the trigger 2 is pulled to rotate forward, the arc-shaped teeth 21 of the trigger 2 drives the push tube 4 and each matching pin 8 to rotate forward via the one-way clutch gear mechanism and the bevel gear 42. The matching pins 8 move towards the front end along the spiral feeding channel via the guide blocks 82. When the trigger 2 rotates in the reverse direction to reset, the arc-shaped teeth 21 of the trigger 2 drives the one-way clutch gear mechanism to enter the disengaged state, so that the trigger 2 cannot drive the bevel gear 42.

[0069] Specifically, a reset spring is provided between the trigger 2 and the handle assembly 1, and the reset spring drives the trigger 2 to perform a reset rotation.

[0070] In this embodiment, a ring groove is formed on the bevel gear 42, which engages with the handle assembly 1, so that the bevel gear 42 can rotate within the handle assembly 1 but cannot move axially, ensuring that it can only rotate within the outer sleeve 31 and cannot move axially.

[0071] When the bevel gear 42 is connected to the outer sleeve 31, the bevel gear 42 is connected to the outer sleeve 31 through a mounting rod. The mounting rod is inserted into the rear end of the outer sleeve 31 and is press-fitted with the outer sleeve 31. The bevel gear 42 is fixedly connected to the mounting rod, thereby causing the bevel gear 42 to drive the outer sleeve 31 to rotate through the mounting rod.

[0072] In this embodiment, the wrench part of the trigger 2 extends out of the handle assembly 1, making it convenient for medical staff to operate.

[0073] In this embodiment, the flat square groove 41 opened on the pushing section radially penetrates the pushing tube 4 and then opens axially. The flat square groove 41 extends to the front end of the pushing tube 4. The pushing tube 4 itself has a tube hole, which accommodates the matching nail 8. A pair of guide blocks 82 of the matching nail 8 extend radially from the pushing tube 4 and are inserted into the spiral feeding channel, so that the matching nail 8 can slowly move forward in the spiral feeding channel by rotation.

[0074] Specifically, as an optional implementation method in this embodiment, such as Figures 4 to 8 As shown, the one-way clutch gear mechanism includes

[0075] like Figure 4 Figure 5 The rotating wheel 5 shown is mounted inside the handle assembly 1 via a rotating shaft. The rotating wheel 5 has axial movement space on the rotating shaft. A ring of transmission teeth 51 is provided on one end face of the rotating wheel 5. The transmission teeth 51 mesh with the bevel gear 42. A positioning groove 52 and an arc-shaped guide groove 53 are formed on the end face of the rotating wheel 5. The bottom surface of the arc-shaped guide groove 53 is an inclined surface. Its lower end is connected to the positioning groove 52, and its upper end is connected to the end face of the rotating wheel 5. A ring of one-way teeth 54 is provided on the other end face of the rotating wheel 5. The one-way teeth 54 cooperate with the spring plate 7.

[0076] like Figure 6 The intermediate tooth 6 shown is sleeved on the rotating shaft. The intermediate tooth 6 includes a gear part 61, an end plate 62 and a locking block 63. The end plate 62 is disposed on one side of the gear part 61, and the locking block 63 is fixed on the end plate 62. The gear part 61 cooperates with the arc-shaped tooth part 21 of the trigger 2, and the locking block 63 cooperates with the positioning groove 52.

[0077] In this embodiment, the gear part 61, the end plate 62, and the locking block 63 are integrated into one structure.

[0078] In this embodiment, the positioning groove 52 is a circular hole, and the locking block 63 is a cylindrical block that is adapted to it.

[0079] like Figure 7 The spring plate 7 shown has one end connected to the handle assembly 1 and the other end forming a spring plate 72. The spring plate 72 engages with the one-way gear 54 to restrict the rotating wheel 5 from rotating in the opposite direction. If the rotating wheel 5 rotates in the opposite direction, the rotating wheel 5 will drive the push tube 4 to rotate in the opposite direction through the bevel gear 42, thereby moving the matching pin 8 backward. This is obviously not allowed to happen, so it is necessary to ensure that the rotating wheel 5 can only rotate in the forward direction.

[0080] Working principle of one-way clutch gear mechanism:

[0081] When the trigger 2 drives the intermediate tooth 6 to rotate forward via the arc-shaped tooth 21, the intermediate tooth 6 drives the rotating wheel 5 to rotate forward via the locking block 63, and the rotating wheel 5 drives the push tube 4 to rotate forward via the transmission tooth 51 and the bevel gear 42; the push tube 4 rotates forward with the anastomosis staple 8, so that the anastomosis staple 8 can move forward.

[0082] When the trigger 2 is pressed once, it needs to be released. During the process of releasing the trigger 2, the intermediate tooth 6 is rotated in the opposite direction by the arc-shaped tooth 21. The locking block 63 of the intermediate tooth 6 moves along the arc-shaped guide groove 53 to the end face of the rotating wheel 5, thereby driving the rotating wheel 5 to move axially and axially compress the spring piece 72. When the trigger 2 is reset, the locking block 63 of the intermediate tooth 6 rotates one revolution in the opposite direction along the end face of the rotating wheel 5 and enters the positioning groove 52. At this time, the rotating wheel 5 is axially reset under the action of the axial elastic force of the spring piece 72.

[0083] In addition to restricting the rotating wheel 5 from rotating in the opposite direction, the spring plate 72 can also provide axial elastic force for the rotating wheel 5. When the intermediate tooth 6 rotates in the opposite direction, the intermediate tooth 6 abuts against the rotating wheel 5 axially through the locking block 63. The transmission tooth 51 of the rotating wheel 5 is disengaged from the bevel gear 42. The advantage of disengagement is that it can completely prevent the rotating wheel 5 from rotating in the opposite direction and causing the push tube 4 to rotate in the opposite direction.

[0084] Specifically, as an optional implementation method in this embodiment, such as Figure 1 As shown, a threaded tube 33 is provided inside the nail storage cavity, and a spiral feeding channel is formed inside the threaded tube 33;

[0085] An inner sleeve 32 is provided inside the outer sleeve 31, and the inner sleeve 32 is located behind the threaded tube 33.

[0086] By directly installing the threaded tube 33 inside the outer sleeve 31, a spiral feeding channel is obtained inside the outer sleeve 31, which facilitates the processing of the spiral feeding channel. The threaded tube 33 is a mature product that can be purchased directly. The function of the inner sleeve 32 is simply to limit the position of the threaded tube 33 inside the outer sleeve 31. The inner sleeve 32 is fixed inside the outer sleeve 31, and then the push tube 4 passes through the inner sleeve 32 and extends into the threaded tube 33.

[0087] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, the front end of the outer sleeve 31 is bent, and the bending angle is less than 15°;

[0088] The push tube 4 is bent at the same angle inside the outer tube 31;

[0089] Sufficient radial clearance is provided between the push tube 4 and the outer sleeve 31 to allow the push tube 4 to rotate within the outer sleeve 31.

[0090] The bending angle at the front end of the outer sleeve 31 makes it easier for the doctor to screw the anal staple 8 into the fistula hole.

[0091] Specifically, as an optional implementation method in this embodiment, such as Figure 1 Figure 2 As shown, a rotating head 11 is provided at the front end of the handle assembly 1, and the outer sleeve 31 is engaged with the rotating head 11 so that the rotating head 11 drives the outer sleeve 31 to rotate.

[0092] Driven by the rotation of the rotating head 11, it can rotate 360 ​​degrees. This makes it easier, more accurate, and faster to locate the internal opening of the anal fistula when continuously firing the anastomotic staples 8.

[0093] In this embodiment, the snap-fit ​​structure between the rotating head 11 and the handle assembly 1 is a conventional structure, which will not be described in detail here. The rotating head 11 can rotate circumferentially after being installed on the handle assembly 1.

[0094] Specifically, as an optional implementation method in this embodiment, such as Figure 6 As shown, the card block 63 is provided with a guide slope 64, which faces the arc-shaped guide groove 53. The card block 63 slides from the positioning groove 52 onto the arc-shaped guide groove 53 via the arc-shaped guide groove 53.

[0095] Specifically, as an optional implementation of the spring sheet 7 in this embodiment, such as Figure 7 As shown, the spring sheet 7 includes a mounting plate 71 and a spring sheet 72. The spring sheet 72 and the mounting plate 71 are in the same plane. The mounting plate 71 is fixedly connected to the handle assembly 1. One end of the spring sheet 72 is connected to the mounting plate 71, and the other end of the spring sheet 72 is bent to form a pressure plate 73. The pressure plate 73 is adapted to abut against the one-way tooth 54.

[0096] The spring piece 72 can elastically deform relative to the mounting piece 71 in the direction of the shaft length. This deformation space can ensure that the rotating wheel 5 can rotate smoothly in the forward direction.

[0097] The bending angle of the tablet press 73 will not interfere with the forward rotation of the roller 5, but it can interfere with the reverse rotation of the roller 5.

[0098] Specifically, as an optional implementation method in this embodiment, such as Figure 9 and Figure 10 As shown, the screw 81 includes a screw body and a spiral blade. The screw body has a conical structure, the spiral blade is disposed on the screw body, and two guide blocks 82 are installed at the large diameter end of the screw body.

[0099] The guide block 82 is a sector-shaped block with some spiral angles. The spiral angles of the guide block 82 can be adapted to the spiral feeding channel.

[0100] Specifically, as an optional implementation method in this embodiment, such as Figure 9 and Figure 10 As shown, the anastomotic staple 8 is made of biodegradable material with a drug coating, which has good biodegradability and biocompatibility. It completely degrades and disappears after 6 months of implantation in the human body, and no secondary surgery is required to remove it.

[0101] The drug coating on the anastomosis staple 8 can improve microcirculation at the implantation site, eliminate edema, accelerate tissue repair, reduce friction between the implanted anastomosis staple 8 and the tissue, reduce the patient's foreign body sensation, improve the compatibility of the implanted anastomosis staple 8 with human tissue, and reduce rejection reaction, thereby achieving the purpose of treating and sealing the internal opening of the anal fistula.

[0102] The following is a method for using an anal fistula stapler, employing the aforementioned rotatable, continuously firing anal fistula stapler, including the following steps:

[0103] Each staple 8 is pre-installed inside the push tube 4, and a certain distance is maintained between each staple 8;

[0104] Pull the handle of trigger 2 to make it rotate forward. Trigger 2 drives the intermediate tooth 6 to rotate forward via the arc-shaped tooth 21. The intermediate tooth 6 drives the rotating wheel 5 to rotate forward via the locking block 63. The rotating wheel 5 drives the bevel gear 42 to rotate via the transmission tooth 51, thereby driving the push tube 4 to rotate. The push tube 4 drives the matching nail 8 to rotate. The matching nail 8 moves towards the front end along the spiral feeding channel via the two guide blocks 82.

[0105] Release trigger 2, trigger 2 will rotate in the reverse direction to reset, trigger 2 will drive the intermediate tooth 6 and the locking block 63 to rotate in the opposite direction, the locking block 63 will move along the arc-shaped guide groove 53 to the end face of the rotating wheel 5, thereby driving the rotating wheel 5 to move axially and axially compress the spring 72. When the trigger 2 is reset, the locking block 63 of the intermediate tooth 6 will rotate one revolution in the opposite direction along the end face of the rotating wheel 5 and enter the positioning groove 52. At this time, the rotating wheel 5 will be axially reset under the action of the axial elastic force of the spring 72. The transmission tooth 51 of the rotating wheel 5 will continue to mesh with the bevel gear 42. Pull the trigger 2 again, so that the matching nail 8 will continue to move forward.

[0106] like Figure 11 As shown, repeat this process multiple times until the entire anastomotic staple 8 is fully inserted into the internal opening of the anal fistula.

[0107] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0108] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0109] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0110] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0111] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0112] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0113] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rotatable, continuously firing anal fistula stapler, characterized in that, include The outer tube (31) is connected to the handle assembly (1) at its rear end and has a nail storage cavity at its front end, in which a spiral feeding channel is formed; A push tube (4) is inserted inside an outer tube (31). The rear end of the push tube (4) extends out from the outer tube (31) and is fitted with a bevel gear (42). The front end of the push tube (4) is provided with a push section, which is located inside the nail storage cavity. A flat square groove (41) is opened on the push section. Handle assembly (1), wherein a trigger (2) and a one-way clutch gear mechanism are provided in the handle assembly (1), the trigger (2) is configured to rotate, and an arc-shaped tooth (21) is provided on the trigger (2), and a gear clutch mechanism is connected between the arc-shaped tooth (21) and the bevel gear (42); The staple (8) includes a screw (81) and a pair of guide blocks (82), the two guide blocks (82) being disposed behind the screw (81); Multiple matching pins (8) are placed in the pushing section. The guide blocks (82) on both sides of the matching pins (8) extend from the flat groove (41) and are inserted into the spiral feeding channel. When the trigger (2) is pulled to rotate in the forward direction, the arc-shaped teeth (21) of the trigger (2) drive the push tube (4) and each matching pin (8) to rotate in the forward direction through the one-way clutch gear mechanism and the bevel gear (42). The matching pins (8) move towards the front end along the spiral feeding channel through the guide blocks (82). When the trigger (2) rotates in the reverse direction to reset, the arc-shaped teeth (21) of the trigger (2) drive the one-way clutch gear mechanism to enter the disengaged state so that the trigger (2) cannot drive the bevel gear (42).

2. The rotatable, continuously firing anal fistula stapler according to claim 1, characterized in that, The one-way clutch gear mechanism includes A rotating wheel (5) is mounted in the handle assembly (1) via a rotating shaft. The rotating wheel (5) has axial movement space on the rotating shaft. A ring of transmission teeth (51) is provided on one end face of the rotating wheel (5). The transmission teeth (51) mesh with a bevel gear (42). A positioning groove (52) and an arc-shaped guide groove (53) are provided on the side end face of the rotating wheel (5). The bottom surface of the arc-shaped guide groove (53) is an inclined surface. Its lower end is connected to the positioning groove (52), and its upper end is connected to the end face of the rotating wheel (5). A ring of one-way teeth (54) is provided on the other end face of the rotating wheel (5). The one-way teeth (54) cooperate with the spring plate (7). The intermediate tooth (6) is sleeved on the rotating shaft. The intermediate tooth (6) includes a gear part (61), an end plate (62), and a locking block (63). The end plate (62) is disposed on one side of the gear part (61), and the locking block (63) is fixed on the end plate (62). The gear part (61) cooperates with the arc-shaped tooth part (21) of the trigger (2), and the locking block (63) cooperates with the positioning groove (52). A spring plate (7) has one end connected to the handle assembly (1) and the other end forming a spring plate (72). The spring plate (72) engages with a one-way tooth (54) to restrict the wheel (5) from rotating in the opposite direction. When the trigger (2) drives the intermediate tooth (6) to rotate in the forward direction via the arc-shaped tooth (21), the intermediate tooth (6) drives the rotating wheel (5) to rotate in the forward direction via the locking block (63), and the rotating wheel (5) drives the push tube (4) to rotate in the forward direction via the transmission tooth (51) and the bevel gear (42); When the trigger (2) drives the intermediate tooth (6) to rotate in the opposite direction via the arc-shaped tooth (21), the locking block (63) of the intermediate tooth (6) moves along the arc-shaped guide groove (53) to the end face of the rotating wheel (5), thereby driving the rotating wheel (5) to move axially and compress the spring (72) axially. When the trigger (2) finishes resetting, the locking block (63) of the intermediate tooth (6) rotates one revolution in the opposite direction along the end face of the rotating wheel (5) and enters the positioning groove (52). At this time, the rotating wheel (5) is axially reset under the action of the axial elastic force of the spring (72).

3. The rotatable, continuously firing anal fistula stapler according to claim 1, characterized in that, A threaded tube (33) is provided inside the nail storage cavity, and a spiral feeding channel is formed inside the threaded tube (33); An inner sleeve (32) is provided inside the outer sleeve (31), and the inner sleeve (32) is located behind the threaded tube (33).

4. The rotatable, continuously firing anal fistula stapler according to claim 1, characterized in that, The front end of the outer sleeve (31) is bent, and the bending angle is less than 15°; The push tube (4) is bent at the same angle inside the outer tube (31); Sufficient radial clearance is left between the push tube (4) and the outer tube (31) to allow the push tube (4) to rotate inside the outer tube (31).

5. The rotatable, continuously firing anal fistula stapler according to claim 4, characterized in that, The handle assembly (1) has a rotating head (11) at its front end, and the outer tube (31) is engaged with the rotating head (11) so that the rotating head (11) drives the outer tube (31) to rotate.

6. The rotatable, continuously firing anal fistula stapler according to claim 2, characterized in that, The card block (63) is provided with a guide slope (64) facing the arc-shaped guide groove (53). The card block (63) slides from the positioning groove (52) onto the arc-shaped guide groove (53) via the arc-shaped guide groove (53).

7. The rotatable, continuously firing anal fistula stapler according to claim 2, characterized in that, The spring sheet (7) includes Mounting plate (71) and spring plate (72), the spring plate (72) and mounting plate (71) are in the same plane, the mounting plate (71) is fixedly connected to the handle assembly (1), one end of the spring plate (72) is connected to the mounting plate (71), the other end of the spring plate (72) is bent to form a pressure plate (73), the pressure plate (73) is adapted to abut against the one-way tooth (54).

8. The rotatable, continuously firing anal fistula stapler according to claim 1, characterized in that, The screw (81) includes a screw body and a spiral blade. The screw body has a conical structure, the spiral blade is disposed on the screw body, and two guide blocks (82) are installed on the large diameter end of the screw body.

9. The rotatable, continuously firing anal fistula stapler according to claim 1, characterized in that, The staples (8) are made of biodegradable material and have a drug coating.

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