An electric stapler with an automatic retraction device

Abstract

The present invention relates to the technical field of electric staplers, and discloses an electric stapler with an automatic retraction device. When there is a height difference in the human tissues clamped on both sides of a certain position of the anastomosis line, the position movement of the soft rod drives the forward limiting plate to rotate, so as to connect the power shaft with the reverse pushing screw rod, causing the push block to move backward. After the soft rod moves away from the height difference position during the backward movement and the soft rod resets and no longer drives the forward limiting plate to rotate, the power shaft is reconnected with the forward pushing screw rod, and the push block moves forward again to form an automatic retraction. During the automatic retraction, the warning light on the stapler will light up. At this time, the medical staff can stop using the stapler and repair the place where the thicker tissue appears due to extrusion, ensuring stability during anastomosis of the diseased tissue and improving the anastomosis quality, and avoiding the situation where the staples cannot be fully stapled due to the generation of height difference.

Description

Technical Field

[0001] The present invention relates to the technical field of electric staplers, and in particular to an electric stapler with an automatic retraction device. Background Art

[0002] Laparoscopic staplers are used for suturing, cutting and severing tissues and organs during laparoscopic and open surgery. They cut and suture tissues by moving forward steadily and at a uniform speed; the rotary motion connection mechanism of its micro-motor is converted into forward and backward motion, and the cutting and pushing of titanium nails into shape will not be fast or slow at times, and the forming force applied to the titanium nails is consistent. The titanium nail forming state is also more stable and the consistency is better, which can greatly reduce the problem of poor titanium nail forming and can effectively reduce the occurrence of medical accidents such as anastomotic bleeding and anastomotic leakage.

[0003] As disclosed in publication number CN110693558A, by providing a clutch device, the motor can drive the lead screw to operate when the motor is operating normally, and the output shaft can be clutched from the lead screw when the power supply is in an abnormal state, thereby preventing accidents; and by providing components such as a clutch handle and a first bevel gear, the first bevel gear can be clutched from the output shaft by pulling the handle, and the bevel gear can be retracted by the first elastic element during normal operation to drive the lead screw to operate, and the operation is simple and fast; at the same time, by providing a retraction device, the first bevel gear in the clutch state is engaged with the second bevel gear, and the state is switched to manual mode, and the retraction handle is turned to reverse the lead screw, and the bevel gear is disengaged during normal operation, and the retraction handle fails, making automatic and manual switching convenient, and by providing a pawl and a ratchet, the retraction handle can only drive the lead screw nut to retract backward, so as to remove the instrument from the patient in case of an abnormality.

[0004] However, there are still the following problems: during anastomosis, since the unit capacity of human tissue in various positions is different, the stapler and the stapler magazine clamp the lesion tissue irregularly and asymmetrically, that is, there is a thicker area at the anastomosis on one side, which forms a height difference with the corresponding anastomosis on the other side, which may easily lead to the thicker side being unable to be completely anastomosed during anastomosis, that is, the staples cannot be completely stapled when the thicker side is nailed into the staplers, causing pain to the patient after the anastomosis or affecting wound healing. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides an electric stapler with an automatic retraction device, which has the advantages of retraction when a height difference is detected on both sides of the current anastomosis to facilitate the handling of the height difference on both sides of the clamping, thereby solving the problem that the anastomosis staples cannot be completely stapled due to the height difference.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: An electric stapler with an automatic retraction device, including an elongate body, a staple cartridge rotatably fitted on the elongate body, a forward limiting plate rotatably fitted in the elongate body, a reverse limiting plate rotatably fitted in the elongate body, the forward limiting plate abutting against the reverse limiting plate for adaptive limitation, a power shaft provided in the elongate body, a forward pushing screw rotatably fitted in the staple cartridge, a reverse pushing screw rotatably fitted in the staple cartridge, a push block slidably fitted in the staple cartridge, a soft rod provided on the push block, and both ends of the soft rod extending outside the bottom surface of the staple cartridge;

[0009] Ensure that when the soft rod detects the height difference on both sides of the anastomotic line, the soft rod drives the forward limiting plate to rotate, so that the reverse limiting plate abuts against the forward limiting plate for adaptive limitation, so as to switch the forward pushing screw driven by the power shaft to drive the reverse pushing screw, and make the forward pushing screw drive the push block to move forward and convert to the reverse pushing screw to drive the push block to move backward.

[0010] Preferably, a plurality of fixing members are fixedly installed in the elongate body, the fixing members are distributed on both sides of the power shaft, a rotating rod is rotatably fitted on each of the fixing members, one side of the rotating rod is fixedly installed with the forward limiting plate, the other side of the rotating rod is fixedly installed with the reverse limiting plate, a torsion spring is sleeved on the rotating rod on the other side, one end of the torsion spring is connected to the fixing member, and the other end of the torsion spring is connected to the reverse limiting plate.

[0011] Preferably, a connecting piece is rotatably fitted on both the forward limiting plate and the reverse limiting plate, a connecting cylinder is fixedly installed on the connecting piece on the other side, a sliding piece is slidably fitted in the connecting cylinder, a connecting rod is fixedly installed on the connecting piece on one side, the connecting rod extends into the connecting cylinder and is fixedly connected to the sliding piece, a spring is sleeved on the connecting rod, the spring is located in the connecting cylinder, one end of the spring is connected to the sliding piece, and the other end of the spring is connected to the connecting cylinder.

[0012] Preferably, a conversion frame is fixedly installed on both the forward limiting plate and the reverse limiting plate, a shaft rod is rotatably fitted on each of the conversion frames, a forward transmission screw is fixedly installed on one side of the shaft rod, and a reverse transmission screw is fixedly installed on the other side of the shaft rod.

[0013] Preferably, a linkage frame is rotatably fitted on both sides of the conversion frame, a linkage rod is rotatably fitted on each of the linkage frames, a forward output screw is fixedly installed on one side of the linkage rod, a reverse output screw is fixedly installed on the other side of the linkage rod, and a belt is tensioned between the shaft rod and the linkage rod.

[0014] Preferably, a partition is fixedly installed in the staple cartridge. An opening is formed in the middle of the partition. The forward pushing screw rod and the reverse pushing screw rod are located above the partition. A moving member is slidably engaged with the partition. The moving member is in screw fit with the forward pushing screw rod and in screw fit with the reverse pushing screw rod. The upper end of the push block penetrates through the opening in the partition, and the upper end of the push block is fixedly installed with the moving member.

[0015] Preferably, a guiding groove is formed at the bottom end of the push block. Both ends and the middle of the guiding groove are open ports. The soft rod is arranged in the guiding groove. Through holes are formed on both sides of the bottom surface of the staple cartridge. Guiding frames are fixedly installed on both sides of the push block. The guiding frames extend into the through holes. Both ends of the soft rod penetrate through the guiding frames on both sides respectively and extend outside the staple cartridge.

[0016] Preferably, a driven plate is slidably engaged in the staple cartridge. The driven plate penetrates through the middle of the soft rod and the middle of the guiding groove. A limiting ring is fixedly installed inside the staple cartridge. A pulling rope is fixedly installed on the driven plate. The pulling rope penetrates through the limiting ring, so that when the driven plate slides, it passes through the pulling rope to drive the forward limiting plate to rotate.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an electric stapler with an automatic retraction device, which has the following beneficial effects:

[0019] When there is a height difference between the human tissues clamped on both sides of a certain position of the anastomosis line by the electric stapler with an automatic retraction device, one end of the soft rod will move inward at the thick part, and the other end of the soft rod will move outward at the thin part, so that the position movement of the soft rod drives the forward limiting plate to rotate, and the reverse limiting plate abuts against the forward limiting plate for adaptive limitation, so as to connect the power shaft with the reverse pushing screw rod, and the push block moves backward. After the soft rod moves away from the height difference position when moving backward, the soft rod resets, and the soft rod no longer drives the forward limiting plate to rotate, so that the forward limiting plate resets and abuts against the reverse limiting plate for adaptive limitation, so as to reconnect the power shaft with the forward pushing screw rod, and the push block moves forward again, so as to form an automatic retraction. And when automatically retracting, the warning light on the stapler will light up. At this time, the medical staff can stop using the stapler, repair the place where the thicker tissue appears due to extrusion, and then continue to use the stapler. The stapler can continue to anastomose at the anastomosis position when it stops, ensuring the stability when anastomosing the diseased tissue and improving the anastomosis quality, and avoiding the situation that the staple cannot be fully stapled due to the generation of height difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the internal structure of the anastomosis end of the present invention;

[0021] Figure 2 Rear view schematic diagram of the internal structure of the anastomosis end of the present invention;

[0022] Figure 3 Schematic diagram of the internal structure of the slender body of the present invention;

[0023] Figure 4 is Figure 3 Enlarged structure schematic diagram at position A in

[0024] Figure 5 Schematic diagram of the structural distribution at the forward limiting plate of the present invention;

[0025] Figure 6 Schematic diagram of the structural distribution at the forward output screw of the present invention;

[0026] Figure 7 Rear view schematic diagram of the structural distribution at the push block of the present invention;

[0027] Figure 8 Front view schematic diagram of the structural distribution at the push block of the present invention;

[0028] Figure 9 Schematic diagram of the bottom surface structure of the push block of the present invention;

[0029] Figure 10 Schematic diagram of the bottom surface structure of the staple cartridge of the present invention

[0030] Figure 11 Schematic diagram of the overall structure of the present invention.

[0031] In the figure: 1. Slender body; 2. Staple cartridge; 31. Fixing member; 32. Rotating rod; 33. Forward limiting plate; 34. Reverse limiting plate; 35. Torsion spring; 36. Connecting piece; 37. Connecting cylinder; 38. Slide piece; 39. Link rod; 310. Spring; 41. Conversion frame; 42. Shaft rod; 43. Forward transmission screw; 44. Reverse transmission screw; 45. Linkage frame; 4501. Limiting groove; 4502. Limiting block; 46. Linking rod; 47. Forward output screw; 48. Reverse output screw; 49. Belt; 410. Power shaft; 51. Forward pushing screw; 52. Reverse pushing screw; 53. Partition board; 54. Moving part; 55. Push block; 61. Guide groove; 62. Soft rod; 63. Through hole; 64. Guide frame; 65. Driven plate; 6501. Side plate; 66. Limiting ring; 67. Pulling rope; 68. First gear; 69. End rod; 610. Conversion rod; 611. Second gear; 612. Soft pad; 613. Detection strip; 7. Staple base; 8. Machine body. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an electric stapler with an automatic retraction device.

[0034] In a typical embodiment of the present application, as Figure 1-2 shown, an electric stapler with an automatic retraction device includes a slender body 1, a staple cartridge 2 rotatably fitted on the slender body 1, a forward limiting plate 33 rotatably fitted in the slender body 1, a reverse limiting plate 34 rotatably fitted in the slender body 1, the forward limiting plate 33 abuts against the reverse limiting plate 34 for adaptive limitation, a power shaft 410 is arranged in the slender body 1, a forward pushing screw 51 is rotatably fitted in the staple cartridge 2, a reverse pushing screw 52 is rotatably fitted in the staple cartridge 2, a push block 55 is slidably fitted in the staple cartridge 2, a soft rod 62 is arranged on the push block 55, and both ends of the soft rod 62 extend outside the bottom surface of the staple cartridge 2;

[0035] It is ensured that when the soft rod 62 detects the height difference on both sides of the anastomotic line, the soft rod 62 drives the forward limiting plate 33 to rotate, so that the reverse limiting plate 34 abuts against the forward limiting plate 33 for adaptive limitation, so as to switch the driving of the forward pushing screw 51 by the power shaft 410 to driving the reverse pushing screw 52, and the forward movement of the push block 55 driven by the forward pushing screw 51 is converted to the reverse movement of the push block 55 driven by the reverse pushing screw 52.

[0036] Furthermore, the power shaft 410 is connected to an output motor in the electric stapler to provide power for the rotation of the power shaft 410.

[0037] Furthermore, both ends of the soft rod 62 are located in front of the push block 55.

[0038] When using the present invention:

[0039] In the initial state, the power shaft 410 is connected to the forward pushing screw 51 by means of the forward limiting plate 33 abutting against the reverse limiting plate 34 for adaptation and limitation. The power shaft 410 drives the forward pushing screw 51 to rotate. The forward pushing screw 51 drives the push block 55 to move forward, so as to push out the staple for stapling. When the push block 55 moves, it drives the soft rod 62 to move together. When there is a height difference between the human tissues clamped on both sides of a certain position of the anastomosis line, one end of the soft rod 62 will move inward at the thick part, and the other end of the soft rod 62 will move outward at the thin part (i.e., the liquid levels in the U-shaped tube are level), so that when the soft rod 62 detects the height difference, it itself forms a position movement relative to the push block 55. The position movement of the soft rod 62 drives the forward limiting plate 33 to rotate, so that the reverse limiting plate 34 abuts against the forward limiting plate 33 for adaptation and limitation, so as to connect the power shaft 410 to the reverse pushing screw 52. The power shaft 410 drives the reverse pushing screw 52 to rotate. The reverse pushing screw 52 drives the push block 55 to move backward. After moving backward to move the soft rod 62 away from the height difference position, the soft rod 62 resets, and the soft rod 62 no longer drives the forward limiting plate 33 to rotate, so that the forward limiting plate 33 resets to abut against the reverse limiting plate 34 for adaptation and limitation, so as to reconnect the power shaft 410 to the forward pushing screw 51, and make the push block 55 move forward again, so as to form an automatic retraction to ensure the stability when anastomosing the diseased tissue and improve the anastomosis quality;

[0040] And during the automatic retraction, the warning light on the stapler will light up. At this time, the medical staff can stop using the stapler, repair the place where the thicker tissue is extruded, and then can continue to use the stapler. The stapler can continue to anastomose at the anastomosis position when it stopped.

[0041] Furthermore, as Figure 3 shown, a plurality of fixing members 31 are fixedly installed inside the slender body 1. The fixing members 31 are distributed on both sides of the power shaft 410. Rotating rods 32 are rotatably fitted on the fixing members 31. The rotating rod 32 on one side is fixedly installed with the forward limiting plate 33, and the rotating rod 32 on the other side is fixedly installed with the reverse limiting plate 34. A torsion spring 35 is sleeved on the rotating rod 32 on the other side. One end of the torsion spring 35 is connected to the fixing member 31, and the other end of the torsion spring 35 is connected to the reverse limiting plate 34.

[0042] Further, the contact portions between the forward limiting plate 33 and the reverse limiting plate 34 are all raised blocks. The top surface of the raised block of the forward limiting plate 33 is an arc top, the right side is an arc-shaped notch, and the bottom end of the notch is a raised limiting clamping platform. The top surface of the raised block of the reverse limiting plate 34 is an arc top, the left side is an arc-shaped notch, and the bottom end of the notch is a raised limiting clamping platform. When the forward limiting plate 33 abuts against the reverse limiting plate 34 for fitting and limiting, the arc top of the forward limiting plate 33 is fitted in the arc-shaped notch of the reverse limiting plate 34 and abuts against the limiting clamping platform of the reverse limiting plate 34. When the reverse limiting plate 34 abuts against the forward limiting plate 33 for fitting and limiting, the arc top of the reverse limiting plate 34 is fitted in the arc-shaped notch of the forward limiting plate 33 and abuts against the limiting clamping platform of the forward limiting plate 33.

[0043] Furthermore, as Figure 5 shown, connecting pieces 36 are rotatably fitted on both the forward limiting plate 33 and the reverse limiting plate 34. A connecting cylinder 37 is fixedly installed on the other connecting piece 36. A sliding piece 38 is slidably fitted in the connecting cylinder 37. A connecting rod 39 is fixedly installed on one connecting piece 36. The connecting rod 39 extends into the connecting cylinder 37 and is fixedly connected to the sliding piece 38. A spring 310 is sleeved on the connecting rod 39. The spring 310 is located inside the connecting cylinder 37. One end of the spring 310 is connected to the sliding piece 38, and the other end of the spring 310 is connected to the connecting cylinder 37.

[0044] Among them, by applying a rotational force to the forward limiting plate 33, the forward limiting plate 33 rotates. The arc top on the forward limiting plate 33 rotates out of the arc-shaped notch on the reverse limiting plate 34 through rotation. The forward limiting plate 33 drives the connecting piece 36 on one side to move. The connecting piece 36 on one side drives the connecting rod 39 to move. The connecting rod 39 drives the sliding piece 38 to move. The movement of the sliding piece 38 compresses the spring 310. Then, the restoring force of the spring 310 drives the connecting cylinder 37 to move. The connecting cylinder 37 drives the connecting piece 36 on the other side to move. The connecting piece 36 on the other side drives the reverse limiting plate 34 to rotate, so that the arc top on the reverse limiting plate 34 rotates into the arc-shaped notch on the forward limiting plate 33, so as to switch the abutting relationship between the forward limiting plate 33 and the reverse limiting plate 34. At the same time, the rotation of the reverse limiting plate 34 compresses the torsion spring 35. After the rotational force applied to the forward limiting plate 33 disappears, the restoring force of the torsion spring 35 causes the reverse limiting plate 34 to rotate to compress the spring 310. The restoring force of the spring 310 drives the arc top on the forward limiting plate 33 to rotate into the arc-shaped notch on the reverse limiting plate 34 again, so as to reset and switch the abutting relationship back. Through the switching of the abutting relationship, the connection between the power shaft 410 and the forward pushing screw 51 and the reverse pushing screw 52 is stably changed, ensuring the stable operation of the automatic retraction.

[0045] Furthermore, as Figure 3As shown, conversion brackets 41 are fixedly installed on both the forward limiting plate 33 and the reverse limiting plate 34. Shaft rods 42 are rotatably fitted on the conversion brackets 41. A forward driving screw rod 43 is fixedly installed on one side of the shaft rod 42, and a reverse driving screw rod 44 is fixedly installed on the shaft rod 42 on the other side.

[0046] Furthermore, when the forward driving screw rod 43 is connected to the power shaft 410, the rotation directions of the forward driving screw rod 43 and the power shaft 410 are the same. When the reverse driving screw rod 44 is connected to the power shaft 410, the rotation directions of the reverse driving screw rod 44 and the power shaft 410 are opposite.

[0047] Among them, the conversion brackets 41 are driven to rotate by the forward limiting plate 33 and the reverse limiting plate 34. The conversion brackets 41 drive the shaft rods 42 to move, and the shaft rods 42 drive the forward driving screw rod 43 and the reverse driving screw rod 44 to move. When the forward limiting plate 33 abuts against the reverse limiting plate 34 for fitting and limiting, the forward driving screw rod 43 meshes with the power shaft 410. When the reverse limiting plate 34 abuts against the forward limiting plate 33 for fitting and limiting, the reverse driving screw rod 44 meshes with the power shaft 410, so that when the abutting relationship between the forward limiting plate 33 and the reverse limiting plate 34 is switched, the power shaft 410 is connected to different driving screw rods.

[0048] Furthermore, as Figure 5-6 shown, linkage brackets 45 are rotatably fitted on both sides of the conversion brackets 41. Linkage rods 46 are rotatably fitted on the linkage brackets 45. A forward output screw rod 47 is fixedly installed on one side of the linkage rod 46, and a reverse output screw rod 48 is fixedly installed on the linkage rod 46 on the other side. A belt 49 is tensioned between the shaft rod 42 and the linkage rod 46.

[0049] Furthermore, the rotation directions of the forward output screw rod 47 and the forward pushing screw rod 51 are the same after connection, and the rotation directions of the reverse output screw rod 48 and the reverse pushing screw rod 52 are the same after connection.

[0050] Preferably, as Figure 4 shown, limiting grooves 4501 are formed on the conversion brackets 41, and limiting blocks 4502 are fixedly installed on the linkage brackets 45. The limiting blocks 4502 extend into the limiting grooves 4501.

[0051] Preferably, the belt 49 is made of rubber material with elastic deformation.

[0052] Among them, the rotation of the shaft rod 42 drives the rotation of the belt 49, the belt 49 drives the rotation of the linkage rod 46, the linkage rod 46 drives the rotation of the forward output screw 47 or the reverse output screw 48, and when the forward limiting plate 33 abuts against the reverse limiting plate 34 for fitting and limiting, the forward output screw 47 meshes with the forward pushing screw 51, and when the reverse limiting plate 34 abuts against the forward limiting plate 33 for fitting and limiting, the reverse output screw 48 meshes with the reverse pushing screw 52, so that the power shaft 410 drives the forward pushing screw 51 or the reverse pushing screw 52 to rotate.

[0053] Specifically, when the forward limiting plate 33 drives the forward transmission screw 43 and the forward output screw 47 to simultaneously mesh with the power shaft 410 and the forward pushing screw 51, since there is no rotation before the forward pushing screw 51 and the forward output screw 47 mesh, there is a situation where direct meshing cannot be achieved during meshing. And when the forward transmission screw 43 can mesh with the power shaft 410, there is also a situation where the forward transmission screw 43 and the power shaft 410 cannot mesh together due to the inability of the forward pushing screw 51 and the forward output screw 47 to directly mesh (similarly, when the reverse limiting plate 34 drives the reverse transmission screw 44 and the reverse output screw 48 to simultaneously mesh with the power shaft 410 and the reverse pushing screw 52, the above problems also exist). After the forward transmission screw 43 meshes with the power shaft 410 and the forward output screw 47 and the forward pushing screw 51 cannot mesh, at this time, under the extrusion force of the forward output screw 47 and the forward pushing screw 51, the linkage frame 45 rotates, and at the same time, the rotation of the linkage frame 45 is restricted by the rotation angle of the limit block 4502 in the limit groove 4501, so that the forward output screw 47 first gives an initial rotation speed to the forward pushing screw 51, and then when the forward output screw 47 and the forward pushing screw 51 can mesh, through the restoring force of the elastic deformation of the belt 49, the forward output screw 47 and the forward pushing screw 51 mesh (similarly, when the reverse limiting plate 34 drives the reverse transmission screw 44 and the reverse output screw 48 to simultaneously mesh with the power shaft 410 and the reverse pushing screw 52, the reverse output screw 48 and the reverse pushing screw 52 mesh), so that the switching of the abutting relationship between the forward limiting plate 33 and the reverse limiting plate 34 can be stably executed.

[0054] Further, as Figure 7-8 shown, a partition plate 53 is fixedly installed in the staple cartridge 2, an opening is formed in the middle of the partition plate 53, the forward pushing screw 51 and the reverse pushing screw 52 are located above the partition plate 53, a moving member 54 is slidably fitted on the partition plate 53, the moving member 54 is in screw fit with the forward pushing screw 51, the moving member 54 is in screw fit with the reverse pushing screw 52, the upper end of the push block 55 penetrates through the opening in the partition plate 53, and the upper end of the push block 55 is fixedly installed with the moving member 54.

[0055] Among them, the forward movement of the screw rod 51 drives the moving part 54 to move forward on the partition plate 53, the moving part 54 drives the pushing block 55 to move forward, the reverse movement of the screw rod 52 drives the moving part 54 to move backward on the partition plate 53, and the moving part 54 drives the pushing block 55 to move backward.

[0056] Further, as Figure 9 shown, a guiding groove 61 is formed at the bottom end of the pushing block 55. Both ends and the middle of the guiding groove 61 are open openings. A flexible rod 62 is arranged in the guiding groove 61. Through openings 63 are formed on both sides of the bottom surface of the staple cartridge 2. Guiding frames 64 are fixedly installed on both sides of the pushing block 55. The guiding frames 64 extend into the through openings 63. Both ends of the flexible rod 62 respectively penetrate through the guiding frames 64 on both sides and extend to the outside of the staple cartridge 2.

[0057] Specifically, when both ends of the flexible rod 62 come into contact with the height difference positions on the clamp, one end of the flexible rod 62 at the contact thick part moves into the guiding frame 64. The flexible rod 62 moves in the guiding groove 61, and the other end of the flexible rod 62 extends out, making it form a principle similar to the water level in a U-shaped tube being flat, so that the flexible rod 62 moves in the guiding groove 61.

[0058] Further, as Figure 7 、 Figure 9 shown, a driven plate 65 is slidably fitted in the staple cartridge 2. The driven plate 65 penetrates through the middle of the flexible rod 62 and the middle of the guiding groove 61. A limiting ring 66 is fixedly installed inside the staple cartridge 2. A pull rope 67 is fixedly installed on the driven plate 65. The pull rope 67 penetrates through the limiting ring 66, so that when the driven plate 65 slides, it passes through the pull rope 67 to drive the forward limiting plate 33 to rotate.

[0059] Preferably, as Figure 7 、 Figure 9 shown, side plates 6501 are fixedly installed on both sides inside the staple cartridge 2. The side plates 6501 are opposite to the middle open openings of the guiding groove 61. The driven plate 65 penetrates between the side plates 6501, so that the side plates 6501 limit the movement of the driven plate 65.

[0060] Further, as Figure 6-7 shown, a first gear 68 is rotatably fitted in the staple cartridge 2. The first gear 68 is opposite to the limiting ring 66. An end rod 69 is rotatably fitted on the first gear 68. One end of the pull rope 67 is fixedly installed on the end rod 69. A conversion rod 610 is rotatably fitted on the fixing member 31. The conversion rod 610 is fixedly connected to one of the rotating rods 32. A second gear 611 is fixedly installed on the conversion rod 610. The second gear 611 meshes with the first gear 68. The size of the second gear 611 is smaller than the size of the first gear 68.

[0061] Among them, when the driven plate 65 moves along with the flexible rod 62, the driven plate 65 drives the pull rope 67 to move. The pull rope 67 is restricted by the limiting ring 66, so that the pull rope 67 pulls the end rod 69 to move. The end rod 69 drives the first gear 68 to rotate. The first gear 68 drives the second gear 611 to rotate. The second gear 611 drives the conversion rod 610 to rotate. The conversion rod 610 drives the rotating rod 32 on one side to rotate. The rotating rod 32 on one side drives the forward limiting plate 33 to rotate, so that when the flexible rod 62 detects a height difference and moves, the forward limiting plate 33 is driven to rotate.

[0062] Furthermore, as Figure 10 shown, a plurality of soft pads 612 are fixedly installed on the bottom surface of the staple cartridge 2. The soft pads 612 are distributed at both ends of the through hole 63. Detection strips 613 are fixedly installed on the soft pads 612. The detection strips 613 are opposite to the through hole 63 respectively. When the flexible rod 62 moves along with the push block 55, both ends of the flexible rod 62 move between the detection strips 613 and the staple cartridge 2, preventing both ends of the flexible rod 62 from pressing against human tissues and causing the device to malfunction.

[0063] Furthermore, as Figure 11 shown, a staple base 7 is rotatably fitted on the staple cartridge 2, and the slender body 1 is rotatably fitted on the body 8.

[0064] The present invention has the following technical effects:

[0065] When there is a height difference between the human tissues clamped on both sides of a certain part of the anastomosis line, one end of the flexible rod will move inward at the thick part, and the other end of the flexible rod will move outward at the thin part, so that the position movement of the flexible rod drives the forward limiting plate to rotate, causing the reverse limiting plate to abut against the forward limiting plate for adaptive restriction, connecting the power shaft to the reverse push screw rod, and making the push block move backward. After the flexible rod moves away from the height difference position during the backward movement, the flexible rod resets, and the flexible rod no longer drives the forward limiting plate to rotate, causing the forward limiting plate to reset and abut against the reverse limiting plate for adaptive restriction, reconnecting the power shaft to the forward push screw rod, and making the push block move forward again, so as to form an automatic retraction. During the automatic retraction, the warning light on the stapler will light up. At this time, the medical staff can stop using the stapler, repair the thicker tissue that has been squeezed out, and then continue to use the stapler. The stapler can continue to anastomose at the anastomosis position when it stopped, ensuring the stability when anastomosing the diseased tissue and improving the anastomosis quality, and avoiding the situation where the staples cannot be fully stapled due to the generation of height differences.

[0066] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric stapler with an automatic retraction device, comprising an elongate body (1) and a staple cartridge (2) rotatably fitted on the elongate body (1). Characterized in that: A forward limiting plate (33) is rotatably fitted in the elongate body (1), a reverse limiting plate (34) is rotatably fitted in the elongate body (1), the forward limiting plate (33) abuts against the reverse limiting plate (34) for adaptive limitation, a power shaft (410) is arranged in the elongate body (1), a forward pushing screw (51) is rotatably fitted in the staple cartridge (2), a reverse pushing screw (52) is rotatably fitted in the staple cartridge (2), a push block (55) is slidably fitted in the staple cartridge (2), a flexible rod (62) is arranged on the push block (55), and both ends of the flexible rod (62) extend outside the bottom surface of the staple cartridge (2). It is ensured that when the flexible rod (62) detects the height difference on both sides of the anastomotic line, the flexible rod (62) drives the forward limiting plate (33) to rotate, so that the reverse limiting plate (34) abuts against the forward limiting plate (33) for adaptive limitation, so as to switch the driving of the forward pushing screw (51) by the power shaft (410) to the driving of the reverse pushing screw (52), and make the forward movement of the push block (55) driven by the forward pushing screw (51) be converted to the reverse movement of the push block (55) driven by the reverse pushing screw (52). In the initial state, the forward limiting plate (33) abuts against the reverse limiting plate (34) for adaptive limitation, so that the power shaft (410) is connected to the forward pushing screw (51). The power shaft (410) drives the forward pushing screw (51) to rotate, and the forward pushing screw (51) drives the push block (55) to move forward, so that the push block (55) pushes out the staples for stapling. When the push block (55) moves, it drives the flexible rod (62) to move together. When there is a height difference in the human tissues clamped on both sides of a certain part of the anastomotic line, one end of the flexible rod (62) will move inward at the thick part, and the other end of the flexible rod (62) will move outward at the thin part, so that the flexible rod (62) forms a position movement relative to the push block (55) when detecting the height difference. The position movement of the flexible rod (62) drives the forward limiting plate (33) to rotate, so that the reverse limiting plate (34) abuts against the forward limiting plate (33) for adaptive limitation, so as to connect the power shaft (410) to the reverse pushing screw (52). The power shaft (410) drives the reverse pushing screw (52) to rotate, and the reverse pushing screw (52) drives the push block (55) to move backward.

2. An electric stapler with an automatic retraction device according to claim 1, Characterized in that: A plurality of fixing members (31) are fixedly installed inside the slender body (1). The fixing members (31) are distributed on both sides of the power shaft (410). Rotating rods (32) are rotatably fitted on the fixing members (31). The rotating rod (32) on one side is fixedly installed with the forward limiting plate (33), and the rotating rod (32) on the other side is fixedly installed with the reverse limiting plate (34). A torsion spring (35) is sleeved on the rotating rod (32) on the other side. One end of the torsion spring (35) is connected to the fixing member (31), and the other end of the torsion spring (35) is connected to the reverse limiting plate (34).

3. The electric stapler with an automatic retraction device according to claim 2, characterized in that: Rotating connecting pieces (36) are rotatably fitted on both the forward limiting plate (33) and the reverse limiting plate (34). A connecting cylinder (37) is fixedly installed on the connecting piece (36) on the other side. A sliding piece (38) is slidably fitted inside the connecting cylinder (37). A connecting rod (39) is fixedly installed on the connecting piece (36) on one side. The connecting rod (39) extends into the connecting cylinder (37) and is fixedly connected to the sliding piece (38). A spring (310) is sleeved on the connecting rod (39). The spring (310) is located inside the connecting cylinder (37). One end of the spring (310) is connected to the sliding piece (38), and the other end of the spring (310) is connected to the connecting cylinder (37); The contact portions between the forward limiting plate (33) and the reverse limiting plate (34) are both raised blocks. The top surface of the raised block of the forward limiting plate (33) is an arc top, the right side is an arc-shaped notch, and the bottom end of the notch is a raised limiting platform. The top surface of the raised block of the reverse limiting plate (34) is an arc top, the left side is an arc-shaped notch, and the bottom end of the notch is a raised limiting platform. When the forward limiting plate (33) abuts against the reverse limiting plate (34) for fitting and limiting, the arc top of the forward limiting plate (33) is fitted in the arc-shaped notch of the reverse limiting plate (34) and abuts against the limiting platform of the reverse limiting plate (34). When the reverse limiting plate (34) abuts against the forward limiting plate (33) for fitting and limiting, the arc top of the reverse limiting plate (34) is fitted in the arc-shaped notch of the forward limiting plate (33) and abuts against the limiting platform of the forward limiting plate (33).

4. The electric stapler with an automatic retraction device according to claim 3, characterized in that: Conversion frames (41) are fixedly installed on both the forward limiting plate (33) and the reverse limiting plate (34). Shaft rods (42) are rotatably fitted on the conversion frames (41). A forward transmission screw rod (43) is fixedly installed on the shaft rod (42) on one side, and a reverse transmission screw rod (44) is fixedly installed on the shaft rod (42) on the other side.

5. The electric stapler with an automatic retraction device according to claim 4, characterized in that: Linkage frames (45) are rotatably fitted on the conversion frames (41) on both sides, linkage rods (46) are rotatably fitted on the linkage frames (45), a forward output screw rod (47) is fixedly installed on one of the linkage rods (46), a reverse output screw rod (48) is fixedly installed on the other linkage rod (46), and a belt (49) is tensioned between the shaft rod (42) and the linkage rod (46); The conversion frame (41) is driven to rotate by the forward limiting plate (33) and the reverse limiting plate (34). The conversion frame (41) drives the shaft rod (42) to move. The shaft rod (42) drives the forward transmission screw rod (43) and the reverse transmission screw rod (44) to move. When the forward limiting plate (33) abuts against the reverse limiting plate (34) for adaptation and limitation, the forward transmission screw rod (43) meshes with the power shaft (410). When the reverse limiting plate (34) abuts against the forward limiting plate (33) for adaptation and limitation, the reverse transmission screw rod (44) meshes with the power shaft (410), so that when the abutting relationship between the forward limiting plate (33) and the reverse limiting plate (34) is switched, the power shaft (410) is connected to different transmission screw rods.

6. An electric stapler with an automatic retraction device according to claim 5, characterized in that: A partition plate (53) is fixedly installed in the staple cartridge (2). An opening is formed in the middle of the partition plate (53). The forward pushing screw rod (51) and the reverse pushing screw rod (52) are located above the partition plate (53). A moving member (54) is slidably fitted on the partition plate (53). The moving member (54) is in screw fit with the forward pushing screw rod (51). The moving member (54) is in screw fit with the reverse pushing screw rod (52). The upper end of the pushing block (55) penetrates through the opening in the partition plate (53), and the upper end of the pushing block (55) is fixedly installed with the moving member (54).

7. An electric stapler with an automatic retraction device according to claim 6, characterized in that: A guiding groove (61) is formed at the bottom end of the pushing block (55). Both ends and the middle of the guiding groove (61) are open ports. A soft rod (62) is arranged in the guiding groove (61). Through openings (63) are formed on both sides of the bottom surface of the staple cartridge (2). Guiding frames (64) are fixedly installed on both sides of the pushing block (55). The guiding frames (64) extend into the through openings (63). Both ends of the soft rod (62) penetrate through the guiding frames (64) on both sides and extend to the outside of the staple cartridge (2).

8. An electric stapler with an automatic retraction device according to claim 7, characterized in that: A driven plate (65) is slidably fitted in the staple cartridge (2). The driven plate (65) penetrates through the middle of the flexible rod (62), and the driven plate (65) penetrates through the middle of the guiding groove (61). A limiting ring (66) is fixedly installed inside the staple cartridge (2). A pull rope (67) is fixedly installed on the driven plate (65). The pull rope (67) penetrates through the limiting ring (66), so that when the driven plate (65) slides, it passes through the pull rope (67) to drive the forward limiting plate (33) to rotate.

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