An electric anal fistula endoscope anastomat

Abstract

The utility model relates to an anus fistula electric cavity kiss anastomat, it includes handle casing and nail bin subassembly, nail bin subassembly includes nail bin seat and stop nail board, is equipped with two rows of accommodating groove no.

Description

Technical Field

[0001] This utility model relates to the field of laparoscopic staplers, and in particular to an electric laparoscopic stapler for anal fistula. Background Technology

[0002] Anal fistula is a common anorectal disease, with its main symptom being recurrent perianal abscesses that form a fistula. Surgical methods for anal fistula mainly include incision and drainage, seton placement, and fistula excision. In clinical practice, doctors have found that traditional seton placement can easily lead to anal incontinence. To overcome this drawback, minimally invasive techniques have become increasingly popular in recent years, such as LIFT (Intersphincteric Fistula Ligation), which treats the intersphincteric fistula by suturing, aiming to reduce tissue damage and improve healing rates.

[0003] However, traditional ligation methods are prone to fistula dislodgement and failure. Therefore, some doctors and experts are trying to use existing laparoscopic staplers to replace traditional ligation in order to improve the success rate.

[0004] The conventional arrangement of staples in existing laparoscopic anastomotic devices is multiple rows on both sides (see reference). Figure 1 The suture opening is large, making it unsuitable for high-level anal fistulas and cases with multiple fistulas, resulting in a high postoperative leakage rate and slow recovery. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an electric endoscopic stapler for anal fistula.

[0006] The electric laparoscopic stapler for anal fistula provided in this application adopts the following technical solution: An electric laparoscopic stapler for anal fistula includes a handle housing and a staple cartridge assembly; The staple cartridge assembly includes a staple cartridge seat and a staple stop plate. The staple cartridge seat has two rows of receiving slots for receiving staples on the side near the staple stop plate. The staple stop plate has a receiving slot corresponding to and communicating with the receiving slots on the side near the staple cartridge seat. An extension tube is provided between the handle housing and the staple cartridge assembly. The extension tube is fixedly connected to the handle housing. A push rod for pushing staples is provided inside the extension tube. A pushing assembly for driving the push rod to slide is provided inside the handle housing. The push rod has a first inclined surface near the end of the staple. The first inclined surface slopes from bottom to top along the direction from near the staple to away from the staple. A push plate is provided below the staple. The push plates corresponding to two adjacent staples in the width direction of the staple cartridge seat are connected by a connecting plate. Each connecting plate has a second inclined surface that cooperates with the first inclined surface of the push rod on the side near the push rod. One end of the staple cartridge holder is connected to the extension tube via a connector. The staple cartridge holder and the connector are fixed together. The connector and the extension tube are oscillatingly connected. An oscillating component for driving the connector to oscillate is provided inside the extension tube. The anvil plate is rotatably connected to the nail cartridge seat, an outer sleeve is provided outside the extension tube, the outer sleeve is slidably connected to the extension tube, and a sliding component for driving the outer sleeve to slide is provided inside the handle housing.

[0007] Preferably, the two adjacent receiving slots in the width direction of the staple cartridge seat are staggered.

[0008] Preferably, the end of the staple cartridge seat away from the handle housing is provided with an auxiliary protrusion, and the end of the auxiliary protrusion away from the handle housing is provided with a clearance slope, which slopes downward in the direction from near the handle housing to away from the handle housing.

[0009] Preferably, the pushing assembly includes a trigger plate, a micro switch, a drive motor, a gear, a gear, a drive rack, and a drive rod. A connecting shaft is provided at the upper middle part of the trigger plate along its length. The connecting shaft is rotatably connected to the inner wall of the handle housing. A tension spring is provided at the top of the trigger plate. One end of the tension spring is connected to the trigger plate, and the other end of the tension spring is connected to the handle housing. The micro switch is located diagonally above the trigger plate. The tension spring pulls the top of the trigger plate away from the micro switch, and the trigger plate can rotate until its top contacts the micro switch. The handle housing is provided with a second micro switch, and the drive rack is provided with a contact element. When the drive rack slides toward the staple cartridge assembly until the push rod pushes all the staples out of the receiving slot, it indicates that the push rod has slid into place. At this time, the contact element contacts the second micro switch. Both micro switch one and micro switch two are electrically connected to the drive motor. Micro switch one controls the starting and direction of the drive motor. When the trigger plate contacts micro switch one, the drive motor starts and rotates forward. When the trigger plate loses contact with micro switch one, the drive motor starts and rotates in reverse. The second micro switch controls the shutdown of the drive motor; The first gear is connected to the output shaft of the drive motor, and the second gear is rotatably mounted in the handle housing via a rotating shaft. The bottom teeth of the second gear mesh with the first gear, and the top teeth of the second gear mesh with the drive rack. One end of the drive rod is fixedly connected to the drive rack, and the other end of the drive rod is fixedly connected to the push rod. The extension tube is provided with a sliding groove for the push rod and the drive rod to slide, and the staple cartridge seat is provided with a through groove for the push rod to pass through. The through groove is connected to the receiving groove one and the receiving groove two.

[0010] Preferably, the swing assembly includes a swing gear, a swing rack one, a swing rack two, a pull rod one, and a pull rod two. An auxiliary cover is provided outside the outer sleeve. The swing gear is rotatably disposed inside the auxiliary cover. The swing rack one and the swing rack two are respectively located on both sides of the swing gear in the radial direction and mesh with the auxiliary gear. The bottom of the swing rack one and the swing rack two extends into the extension tube. Both the outer sleeve and the extension tube are provided with clearance slots for the swing rack one and the swing rack two to move. The pull rod one is connected to the bottom end of the swing rack one, and the pull rod two is connected to the bottom end of the swing rack two. The pull rod one and the pull rod two slide on both sides of the drive rod in the radial direction. The extension tube is provided with a sliding groove two for the pull rod one and the pull rod two to slide. The end of the connector away from the staple cartridge seat is rotatably connected to the extension tube via a pin. The end of the pull rod one away from the swing rack one is provided with a pull hook one. The end of the pull rod two away from the swing rack two is provided with a pull hook two. The end of the connector away from the staple cartridge seat is provided with a snap-fit ​​hole one for the pull hook one to be engaged and a snap-fit ​​hole two for the pull hook two to be engaged. When the first swing rack slides toward the staple cartridge seat, the second swing rack slides away from the staple cartridge seat. At this time, the end of the first pull rod connected to the connector slides toward the staple cartridge seat, and the end of the second pull rod connected to the connector slides away from the staple cartridge seat, causing the connector to swing clockwise. When the first swing rack slides away from the staple cartridge seat, the second swing rack slides towards the staple cartridge seat. At this time, the end of the first pull rod connected to the connector slides away from the staple cartridge seat, and the end of the second pull rod connected to the connector slides towards the staple cartridge seat, causing the connector to swing counterclockwise.

[0011] Preferably, a knob is provided on the outside of the auxiliary cover, the knob is coaxially connected to the swing gear, a fixing plate is provided in the middle of the knob, the length of the fixing plate is greater than the length of the knob, and a circular groove is provided on the auxiliary cover for the knob to rotate.

[0012] Preferably, the sliding assembly includes an operation plate, a connecting rod, and a connecting shell. The operation plate includes a first plate and a second plate, which intersect to form a "7" shape. The first plate is located below the second plate. A fixing pin is provided at the connection between the first plate and the second plate. The fixing pin is rotatably connected to the handle shell. One end of the connecting rod is rotatably connected to the end of the second plate away from the first plate, and the other end of the connecting rod is rotatably connected to the connecting shell. The connecting shell is located outside the outer sleeve and is fixedly connected to the outer sleeve. The fixing pin is rotatably connected to the handle housing via a torsion spring. The torsion spring is mounted on the fixing pin. One end of the torsion spring is connected to the first plate, and the other end of the torsion spring is connected to the handle housing. The torsion spring applies a force to the first plate to cause the first plate to rotate away from the handle housing. The anvil plate is rotatably connected to the staple cartridge seat via a connecting pin. A second torsion spring is provided on the connecting pin. One end of the second torsion spring is connected to the staple cartridge seat, and the other end of the second torsion spring is connected to the anvil plate. The second torsion spring applies a force to the anvil plate, causing the anvil plate to rotate in a direction away from the staple cartridge seat. The anvil plate has a mating slope at one end near the connector. The mating slope slopes downward in the direction away from the connector and towards the connector. The outer sleeve contacts the lowest end of the mating slope and gradually presses the anvil plate down through the mating slope. After the first plate is rotated toward the handle housing, the end of the second plate away from the first plate rotates counterclockwise and drives the connecting rod to move toward the staple cartridge assembly, causing the connecting shell to drive the outer sleeve to move toward the staple cartridge assembly.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. The staple cartridge assembly is small in size, resulting in a small suture opening, reducing patient discomfort and lowering the risk of leakage and infection; 2. Two rows of sutures are used for safe suturing, resulting in good anastomosis and a low recurrence rate; 3. The auxiliary protrusions facilitate the hooking of tissue between the staple cartridge and the anvil plate. After the tissue is sutured with staples, the operation is simple and the operation time is shortened. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a staple cartridge component in existing technology.

[0015] Figure 2 This is a schematic diagram of the overall external structure of the electric endoscopic anal fistula stapler in the embodiments of this application.

[0016] Figure 3 This is a schematic diagram illustrating the internal structure of the handle housing and the outer sleeve in an embodiment of this application.

[0017] Figure 4 This is a structural schematic diagram used to illustrate the receiving groove in this embodiment of the application.

[0018] Figure 5 This is a schematic diagram illustrating the structure of the second receiving tank in this application embodiment.

[0019] Figure 6 This is a schematic diagram illustrating the structure of the pusher in the embodiments of this application.

[0020] Figure 7 This is a schematic diagram illustrating the structure of the pusher and the sew pin in the embodiments of this application.

[0021] Figure 8 This is a schematic diagram of the structure of the pushing component used in the embodiments of this application. From this perspective, the micro switch can be seen.

[0022] Figure 9 This is a schematic diagram of the structure of the pushing component in the embodiment of this application. The micro switch can be seen from this perspective.

[0023] Figure 10 This is a structural schematic diagram used to illustrate the swing component in an embodiment of this application.

[0024] Figure 11 This is a schematic diagram illustrating the structure of the sliding component in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Handle housing; 2. Staple cartridge assembly; 21. Staple cartridge seat; 211. Receiving groove one; 212. Auxiliary protrusion; 2121. Clearance slope; 22. Staple abutment plate; 221. Receiving groove two; 222. Mating slope; 23. Stitch; 24. Push plate; 241. Connecting plate; 242. Slope two; 3. Extension tube; 31. Push rod; 311. Slope one; 4. Connector; 41. Snap-fit ​​hole one; 42. Snap-fit ​​hole two; 43. Swing pin; 5. Outer sleeve; 51. Elastic part; 6. Push assembly; 61. Trigger plate; 62. Micro switch one; 6 3. Drive motor; 64. Gear 1; 65. Gear 2; 66. Drive rack; 661. Contact element; 67. Drive rod; 68. Tension spring; 69. Micro switch 2; 7. Swing assembly; 71. Swing gear; 72. Swing rack 1; 73. Swing rack 2; 74. Pull rod 1; 741. Pull hook 1; 75. Pull rod 2; 751. Pull hook 2; 76. Auxiliary cover; 77. Knob; 78. Fixing plate; 8. Sliding assembly; 81. Operation panel; 811. First plate; 812. Second plate; 813. Fixing pin; 82. Connecting rod; 83. Connecting shell. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 2-11 This application will be described in further detail.

[0027] This application discloses an electric laparoscopic stapler for anal fistula.

[0028] Reference Figure 2-11The electric endoscopic stapler for anal fistula includes a handle housing 1 and a staple cartridge assembly 2. The staple cartridge assembly 2 includes a staple cartridge seat 21 and an anvil plate 22. The staple cartridge seat 21 has two rows of receiving grooves 211 for receiving staples 23 on the side near the anvil plate 22. The staples 23 are U-shaped. The anvil plate 22 has a second receiving groove 221 on the side near the staple cartridge seat 21, which corresponds to and communicates with the first receiving groove 211. The two ends of the second receiving groove 221 are arc-shaped in the length direction. Adjacent receiving grooves 211 in the width direction of the staple cartridge seat 21 are staggered to improve the suturing effect.

[0029] An extension tube 3 is provided between the handle housing 1 and the staple cartridge assembly 2. The extension tube 3 is fixedly connected to the handle housing 1. A push rod 31 for pushing the staples 23 is provided inside the extension tube 3.

[0030] Reference Figure 2-7 The push rod 31 has a bevel 311 at one end near the staple 23. The bevel 311 slopes upward from bottom to top along the direction from near the staple 23 to away from the staple 23. Below the staples 23, a pusher 24 is provided, which is also located in the receiving groove 211. The pushers 24 corresponding to two adjacent staples 23 in the width direction of the staple cartridge 21 are connected by a connecting plate 241. Two adjacent receiving grooves 211 in the width direction of the staple cartridge 21 are partially connected, allowing the connecting plate 241 to move up and down. Each connecting plate 241 has a second inclined surface 242 on the side near the push rod 31 that cooperates with the inclined surface 311 of the push rod 31. After the push rod 31 moves away from the handle housing 1, the first inclined surface 311 contacts the second inclined surface 242 and pushes each staple 23 out of the receiving groove 211 in sequence, so that the two ends of the staple 23 pass through the tissue. Then, after the two ends of the staple 23 contact the arc-shaped inner wall of the receiving groove 221, the two ends of the staple 23 bend towards each other, thereby suturing the tissue. After the push rod 31 is reset, the pusher 24 naturally descends and resets under the action of gravity.

[0031] The staple cartridge 21 has an auxiliary protrusion 212 at the end away from the handle housing 1, and a clearance slope 2121 at the end of the auxiliary protrusion 212 away from the handle housing 1. The clearance slope 2121 slopes downwards from the direction close to the handle housing 1 to the direction away from the handle housing 1. When the staple cartridge assembly 2 is inserted into the anus, the clearance slope 2121 improves the smoothness of the staple cartridge assembly 2 entering the anus and improves patient comfort. The auxiliary protrusion 212 facilitates the hooking of tissue between the staple cartridge 21 and the anvil plate 22.

[0032] Reference Figure 8-9 The handle housing 1 is equipped with a push assembly 6 that drives the push rod 31 to slide.

[0033] One end of the staple cartridge seat 21 is connected to the extension tube 3 via the connector 4. The staple cartridge seat 21 is fixed to the connector 4. The connector 4 is oscillatingly connected to the extension tube 3 via the swing pin 43. The extension tube 3 is provided with a swing assembly 7 for driving the connector 4 to swing.

[0034] The outer tube 5 has an elastic part 51 at the position of the connector 4. The elastic part 51 is made of TPU material to ensure that the connector 4 can swing. Except for the elastic part 51, the outer tube 5 is made of rigid material to ensure the overall structural support of the outer tube 5.

[0035] The anvil plate 22 has a mating ramp 222 at one end near the connector 4. The mating ramp 222 slopes downward in the direction away from the connector 4 and towards the connector 4. The anvil plate 22 is rotatably connected to the staple cartridge seat 21. An outer sleeve 5 is provided outside the extension tube 3. The outer sleeve 5 is slidably connected to the extension tube 3. A sliding component 8 for driving the outer sleeve 5 to slide is provided inside the handle housing 1. When the outer sleeve 5 slides towards the staple cartridge assembly 2, the outer sleeve 5 contacts the lowest end of the mating ramp 222 and gradually presses the anvil plate 22 down through the mating ramp 222.

[0036] The actuating component 6 includes a trigger plate 61, a micro switch 62, a drive motor 63, a gear 64, a gear 65, a drive rack 66, and a drive rod 67. A connecting shaft is located at the upper middle part of the trigger plate 61 along its length. The connecting shaft is rotatably connected to the inner wall of the handle housing 1. A tension spring 68 is located on the top of the trigger plate 61. One end of the tension spring 68 is connected to the trigger plate 61, and the other end of the tension spring 68 is connected to the handle housing 1. The micro switch 62 is located diagonally above the trigger plate 61. The tension spring 68 pulls the top of the trigger plate 61 away from the micro switch 62, allowing the trigger plate 61 to rotate until its top contacts the micro switch 62.

[0037] A micro switch 69 is provided inside the handle housing 1, and a contact 661 is provided on the drive rack 66. When the drive rack 66 slides toward the staple cartridge assembly 2 until the push rod 31 pushes all the staples 23 out of the receiving groove 211, it indicates that the push rod 31 has slid into place. At this time, the contact 661 contacts the micro switch 69.

[0038] Micro switch 62 and micro switch 69 are both electrically connected to drive motor 63. Micro switch 62 controls the opening and rotation of drive motor 63. When trigger plate 61 contacts micro switch 62, drive motor 63 turns on and rotates forward. When trigger plate 61 loses contact with micro switch 62, drive motor 63 turns on and rotates in reverse.

[0039] Microswitch 2 69 controls the shutdown of drive motor 63.

[0040] Gear 1 64 is connected to the output shaft of drive motor 63. Gear 2 65 is rotatably mounted in handle housing 1 via a rotating shaft. The teeth at the bottom of gear 2 65 mesh with gear 1 64, and the teeth at the top of gear 2 65 mesh with drive rack 66. One end of drive rod 67 is fixedly connected to drive rack 66, and the other end of drive rod 67 is fixedly connected to push rod 31.

[0041] The extension tube 3 is provided with a sliding groove for the push rod 31 and the drive rod 67 to slide, and the nail cartridge seat 21 is provided with a through groove for the push rod 31 to pass through. The through groove is connected to the receiving groove 211 and the receiving groove 221.

[0042] Rotate the trigger plate 61 toward the handle housing 1 so that the top of the trigger plate 61 contacts the micro switch 62. The micro switch 62 controls the drive motor 63 to turn on and rotate forward. The drive motor 63 controls the gear 64 to rotate forward, so that the drive rack 66 slides toward the staple cartridge assembly 2. When the push rod 31 slides into place towards the staple cartridge assembly 2, the contact 661 contacts the micro switch 69, and the micro switch 69 controls the drive motor 63 to turn off. After the trigger plate 61 is released, the tension spring 68 pulls the top of the trigger plate 61 away from the micro switch 62, causing the top of the trigger plate 61 to disengage from the micro switch 62. The micro switch 62 controls the drive motor 63 to turn on and reverse. The drive motor 63 controls the gear 64 to reverse, causing the drive rack 66 to slide back to its original position away from the staple cartridge assembly 2.

[0043] Reference Figure 10 The swing assembly 7 includes a swing gear 71, a swing rack 72, a swing rack 73, a pull rod 74, and a pull rod 75. An auxiliary cover 76 is provided outside the outer sleeve 5. The swing gear 71 is rotatably disposed inside the auxiliary cover 76. The swing rack 72 and the swing rack 73 are located on both sides of the swing gear 71 in the radial direction and mesh with the auxiliary gear. The bottom of the swing rack 72 and the swing rack 73 extends into the extension tube 3. Both the outer sleeve 5 and the extension tube 3 are provided with clearance slots for the swing rack 72 and the swing rack 73 to move. The pull rod 74 is connected to the bottom end of the swing rack 72, and the pull rod 75 is connected to the bottom end of the swing rack 73. The pull rod 74 and the pull rod 75 slide on both sides of the drive rod 67 in the radial direction. The extension tube 3 is provided with a sliding groove 2 for the pull rod 74 and the pull rod 75 to slide.

[0044] The end of connector 4 away from staple cartridge seat 21 is rotatably connected to extension tube 3 via a pin. The end of pull rod 1 74 away from swing rack 1 72 is provided with hook 1 741. The end of pull rod 2 75 away from swing rack 2 73 is provided with hook 2 751. The end of connector 4 away from staple cartridge seat 21 is provided with snap-fit ​​hole 1 41 for snap-fit ​​hook 1 741 and snap-fit ​​hole 2 42 for snap-fit ​​hook 2 751.

[0045] When the first swing rack 72 slides towards the staple cartridge seat 21, the second swing rack 73 slides away from the staple cartridge seat 21. At this time, the end of the first pull rod 74 connected to the connector 4 slides towards the staple cartridge seat 21, and the end of the second pull rod 75 connected to the connector 4 slides away from the staple cartridge seat 21, causing the connector 4 to swing clockwise. In this embodiment, clockwise and counterclockwise are referenced to the position of the abutment plate 22 above the staple cartridge seat 21.

[0046] When the first swing rack 72 slides away from the staple cartridge seat 21, the second swing rack 73 slides towards the staple cartridge seat 21. At this time, the end of the first pull rod 74 connected to the connector 4 slides away from the staple cartridge seat 21, and the end of the second pull rod 75 connected to the connector 4 slides towards the staple cartridge seat 21, causing the connector 4 to swing counterclockwise.

[0047] A knob 77 is provided on the outside of the auxiliary cover 76. The knob 77 is coaxially connected to the swing gear 71. A fixing plate 78 is provided in the middle of the knob 77. The length of the fixing plate 78 is greater than the length of the knob 77. A circular groove for the knob 77 to rotate is provided on the auxiliary cover 76.

[0048] By turning knob 77, doctors can swing the staple cartridge assembly 2 to a suitable angle to operate the instrument, thereby increasing the usability of the stapler.

[0049] Reference Figure 11 The sliding assembly 8 includes an operation plate 81, a connecting rod 82, and a connecting shell 83. The operation plate 81 includes a first plate 811 and a second plate 812, which intersect to form a "7" shape. The first plate 811 is located below the second plate 812. A fixing pin 813 is provided at the connection between the first plate 811 and the second plate 812. The fixing pin 813 is rotatably connected to the handle shell 1. One end of the connecting rod 82 is rotatably connected to the end of the second plate 812 away from the first plate 811. The other end of the connecting rod 82 is rotatably connected to the connecting shell 83. The connecting shell 83 is located outside the outer sleeve 5 and is fixedly connected to the outer sleeve 5.

[0050] The fixing pin 813 is rotatably connected to the handle housing 1 via a torsion spring. The torsion spring is mounted on the fixing pin 813. One end of the torsion spring is connected to the first plate 811, and the other end of the torsion spring is connected to the handle housing 1. The torsion spring applies a force to the first plate 811, causing the first plate 811 to rotate away from the handle housing 1.

[0051] The anvil plate 22 is rotatably connected to the staple cartridge seat 21 via a connecting pin. A second torsion spring is provided on the connecting pin. One end of the second torsion spring is connected to the staple cartridge seat 21, and the other end of the second torsion spring is connected to the anvil plate 22. The second torsion spring applies a force to the anvil plate 22, causing the anvil plate 22 to rotate in a direction away from the staple cartridge seat 21.

[0052] After the first plate 811 is rotated toward the handle housing 1, the end of the second plate 812 away from the first plate 811 rotates counterclockwise and drives the connecting rod 82 toward the staple cartridge assembly 2, so that the connecting shell 83 drives the outer sleeve 5 toward the staple cartridge assembly 2.

[0053] The implementation principle of the electric laparoscopic stapler for anal fistula in this application embodiment is as follows: First, swing the staple cartridge assembly 2 to a suitable position, then align the staple cartridge seat 21 and the anvil plate 22 with the tissue, and then rotate the first plate 811 toward the direction of the handle housing 1, so that the connecting shell 83 drives the outer tube 5 to move toward the direction of the staple cartridge assembly 2. The outer tube 5 contacts the lowest end of the mating inclined surface 222 and gradually presses down the anvil plate 22 through the mating inclined surface 222, so that the staple cartridge seat 21 and the anvil plate 22 clamp the tissue. Then, the trigger plate 61 is rotated toward the handle housing 1 so that the top of the trigger plate 61 contacts the micro switch 62. The micro switch 62 controls the drive motor 63 to turn on, and the drive motor 63 controls the gear 64 to rotate, so that the drive rack 66 slides toward the staple cartridge assembly 2. Thus, the push rod 31 enters the staple cartridge seat 21 and pushes the staples 23 out of the receiving groove 211. The two ends of the staples 23 pass through the tissue. Then, after the two ends of the staples 23 contact the arc-shaped inner wall of the receiving groove 221, the two ends of the staples 23 bend toward each other, thereby suturing the tissue. When the push rod 31 slides into place towards the staple cartridge assembly 2, the contact 661 contacts the micro switch 69, and the micro switch 69 controls the drive motor 63 to turn off. After the trigger plate 61 is released, the tension spring 68 pulls the top of the trigger plate 61 away from the micro switch 62, causing the top of the trigger plate 61 to disengage from the micro switch 62. The micro switch 62 controls the drive motor 63 to turn on and reverse. The drive motor 63 controls the gear 64 to reverse, causing the drive rack 66 to slide back to its original position away from the staple cartridge assembly 2.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric laparoscopic stapler for anal fistula, characterized in that: Includes a handle housing (1) and a staple cartridge assembly (2); The staple cartridge assembly (2) includes a staple cartridge seat (21) and a staple plate (22). The staple cartridge seat (21) has two rows of receiving grooves (211) for receiving staples (23) on the side near the staple plate (22). The staple plate (22) has a receiving groove (221) that corresponds to and communicates with the receiving grooves (211) on the side near the staple cartridge seat (21). An extension tube (3) is provided between the handle housing (1) and the staple cartridge assembly (2). The extension tube (3) is fixedly connected to the handle housing (1). A push rod (31) for pushing the staples (23) is provided inside the extension tube (3). A push assembly (6) for driving the push rod (31) to slide is provided inside the handle housing (1). The push rod (31) has a first inclined surface (311) at one end near the staple (23). The first inclined surface (311) slopes upward from bottom to top along the direction from near the staple (23) to away from the staple (23). A push piece (24) is provided below the staple (23). The push pieces (24) corresponding to two adjacent staples (23) in the width direction of the staple cartridge (21) are connected by a connecting plate (241). Each connecting plate (241) has a second inclined surface (242) on the side near the push rod (31) that cooperates with the first inclined surface (311) of the push rod (31). One end of the staple cartridge seat (21) is connected to the extension tube (3) via a connector (4). The staple cartridge seat (21) is fixed to the connector (4). The connector (4) is oscillatingly connected to the extension tube (3). An oscillating component (7) for driving the connector (4) to oscillate is provided inside the extension tube (3). The anvil plate (22) is rotatably connected to the nail cartridge seat (21). An outer sleeve (5) is provided outside the extension tube (3). The outer sleeve (5) is slidably connected to the extension tube (3). A sliding component (8) for driving the outer sleeve (5) to slide is provided inside the handle housing (1).

2. The electric endoscopic stapler for anal fistula according to claim 1, characterized in that: The staple cartridge seat (21) has two adjacent receiving slots (211) staggered in the width direction.

3. The electric endoscopic stapler for anal fistula according to claim 1, characterized in that: The staple cartridge seat (21) is provided with an auxiliary protrusion (212) at one end away from the handle housing (1), and a clearance slope (2121) is provided at the other end of the auxiliary protrusion (212) away from the handle housing (1). The clearance slope (2121) is inclined downward in the direction from near the handle housing (1) to away from the handle housing (1).

4. The electric endoscopic stapler for anal fistula according to claim 1, characterized in that: The pushing assembly (6) includes a trigger plate (61), a micro switch (62), a drive motor (63), a gear (64), a gear (65), a drive rack (66), and a drive rod (67). A connecting shaft is provided at the upper part of the middle of the trigger plate (61) along its length. The connecting shaft is rotatably connected to the inner wall of the handle housing (1). A tension spring (68) is provided at the top of the trigger plate (61). One end of the tension spring (68) is connected to the trigger plate (61), and the other end of the tension spring (68) is connected to the handle housing (1). The micro switch (62) is located diagonally above the trigger plate (61). The tension spring (68) pulls the top of the trigger plate (61) away from the micro switch (62). The trigger plate (61) can rotate until the top of the trigger plate (61) contacts the micro switch (62). The handle housing (1) is provided with a micro switch (69), and the drive rack (66) is provided with a contact (661). When the drive rack (66) slides toward the staple cartridge assembly (2) until the push rod (31) pushes all the staples (23) out of the receiving groove (211), it indicates that the push rod (31) has slid into place. At this time, the contact (661) contacts the micro switch (69). Both micro switch one (62) and micro switch two (69) are electrically connected to the drive motor (63). Micro switch one (62) controls the opening and rotation of the drive motor (63). When the trigger plate (61) contacts micro switch one (62), the drive motor (63) turns on and rotates forward. When the trigger plate (61) disengages from micro switch one (62), the drive motor (63) turns on and rotates in reverse. The micro switch (69) controls the shut-off of the drive motor (63); The first gear (64) is connected to the output shaft of the drive motor (63), and the second gear (65) is rotatably mounted in the handle housing (1) via a rotating shaft. The bottom teeth of the second gear (65) mesh with the first gear (64), and the top teeth of the second gear (65) mesh with the drive rack (66). One end of the drive rod (67) is fixedly connected to the drive rack (66), and the other end of the drive rod (67) is fixedly connected to the push rod (31). The extension tube (3) is provided with a sliding groove for the push rod (31) and the drive rod (67) to slide, and the nail cartridge seat (21) is provided with a through groove for the push rod (31) to pass through, and the through groove is connected to the receiving groove one (211) and the receiving groove two (221).

5. The electric endoscopic stapler for anal fistula according to claim 4, characterized in that: The swing assembly (7) includes a swing gear (71), a swing rack one (72), a swing rack two (73), a pull rod one (74), and a pull rod two (75). An auxiliary cover (76) is provided outside the outer sleeve (5). The swing gear (71) is rotatably disposed inside the auxiliary cover (76). The swing rack one (72) and the swing rack two (73) are respectively located on both sides of the swing gear (71) in the radial direction and mesh with the auxiliary gear. The bottom of the swing rack one (72) and the swing rack two (73) extends outward. Inside the extension tube (3), both the outer tube (5) and the extension tube (3) are provided with clearance slots for the movement of the first swing rack (72) and the second swing rack (73). The first pull rod (74) is connected to the bottom end of the first swing rack (72), and the second pull rod (75) is connected to the bottom end of the second swing rack (73). The first pull rod (74) and the second pull rod (75) slide on both sides of the radial direction of the drive rod (67). The extension tube (3) is provided with a second sliding groove for the first pull rod (74) and the second pull rod (75) to slide. The end of the connector (4) away from the staple cartridge seat (21) is rotatably connected to the extension tube (3) by a pin. The end of the pull rod (74) away from the swing rack (72) is provided with a hook (741). The end of the pull rod (75) away from the swing rack (73) is provided with a hook (751). The end of the connector (4) away from the staple cartridge seat (21) is provided with a locking hole (41) for the hook (741) to be engaged and a locking hole (42) for the hook (751) to be engaged. When the first swing rack (72) slides toward the direction of the staple cartridge seat (21), the second swing rack (73) slides toward the direction of the direction of the staple cartridge seat (21). At this time, the end of the first pull rod (74) connected to the connector (4) slides toward the direction of the staple cartridge seat (21), and the end of the second pull rod (75) connected to the connector (4) slides toward the direction of the direction of the direction of the direction of the direction of the direction of the staple cartridge seat (21), so that the connector (4) swings clockwise. When the first swing rack (72) slides away from the staple cartridge seat (21), the second swing rack (73) slides towards the staple cartridge seat (21). At this time, the end of the first pull rod (74) connected to the connector (4) slides away from the staple cartridge seat (21), and the end of the second pull rod (75) connected to the connector (4) slides towards the staple cartridge seat (21), causing the connector (4) to swing counterclockwise.

6. The electric endoscopic stapler for anal fistula according to claim 5, characterized in that: A knob (77) is provided on the outside of the auxiliary cover (76). The knob (77) is coaxially connected to the swing gear (71). A fixing plate (78) is provided in the middle of the knob (77). The length of the fixing plate (78) is greater than the length of the knob (77). A circular groove for the knob (77) to rotate is provided on the auxiliary cover (76).

7. The electric endoscopic stapler for anal fistula according to claim 1, characterized in that: The sliding assembly (8) includes an operation plate (81), a connecting rod (82), and a connecting shell (83). The operation plate (81) includes a first plate (811) and a second plate (812). The first plate (811) and the second plate (812) intersect in a "7" shape. The first plate (811) is located below the second plate (812). A fixing pin (813) is provided at the connection between the first plate (811) and the second plate (812). The fixing pin (813) is rotatably connected to the handle housing (1). One end of the connecting rod (82) is rotatably connected to the end of the second plate (812) away from the first plate (811). The other end of the connecting rod (82) is rotatably connected to the connecting shell (83). The connecting shell (83) is located outside the outer sleeve (5) and is fixedly connected to the outer sleeve (5). The fixing pin (813) is rotatably connected to the handle housing (1) via a torsion spring. The torsion spring is fitted onto the fixing pin (813). One end of the torsion spring is connected to the first plate (811), and the other end of the torsion spring is connected to the handle housing (1). The torsion spring applies a force to the first plate (811) to cause the first plate (811) to rotate away from the handle housing (1). The anvil plate (22) is rotatably connected to the staple cartridge seat (21) via a connecting pin. A second torsion spring is provided on the connecting pin. One end of the second torsion spring is connected to the staple cartridge seat (21), and the other end of the second torsion spring is connected to the anvil plate (22). The second torsion spring applies a force to the anvil plate (22) to rotate it away from the staple cartridge seat (21). The anvil plate (22) is provided with a mating slope (222) at one end near the connector (4). The mating slope (222) slopes downward in the direction away from the connector (4) and closer to the connector (4). The outer sleeve (5) contacts the lowest end of the mating slope (222) and gradually presses the anvil plate (222) down through the mating slope (222). After the first plate (811) is rotated toward the handle housing (1), the end of the second plate (812) away from the first plate (811) rotates counterclockwise and drives the connecting rod (82) to move toward the staple cartridge assembly (2), so that the connecting shell (83) drives the outer tube (5) to move toward the staple cartridge assembly (2).

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