A stapler with auxiliary resetting mechanism

Abstract

The present invention belongs to the field of medical device technology, and in particular to an anastomosis device with an auxiliary resetting mechanism. In view of the problem in the prior art that when the device needs to be reset after firing and stapling, it is easy to get stuck due to circuit problems, resulting in unsmooth resetting, the following scheme is proposed, including a driving handle, the gun head end of the driving handle is fixed with a main support inner tube, and the circumferential outer wall of the main support inner tube is slidably sleeved with a push-on bite tube; an anti-twist slider is provided between the push-on bite tube and the main support inner tube, and an actuator is provided at the end of the main support inner tube away from the driving handle. When the present invention needs to control the lower jaw plate to form a bite, it only needs to push the push-on bite tube forward, and at this time, the roller will slowly become horizontal by contacting the drooping hinged ear plate from below, and then the lower jaw plate and the upper jaw splint will complete the fitting; when resetting is required, if the electric drive end is stuck, it only needs to pull the push-on bite tube backward to make the roller withdraw to the bottom of the steering block.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stapler with an auxiliary resetting mechanism. Background Art

[0002] The endoscopic cutting stapler and its actuator suitable for minimally invasive surgery is an instrument that can staple multiple staggered staples into human tissue in a straight line and simultaneously cut the tissue between the staple lines with a cutting knife. It is also one of the instruments widely used in minimally invasive surgery, mainly used for tissue resection, transection and anastomosis in open or endoscopic surgery in abdominal surgery, gynecology, pediatrics and thoracic surgery.

[0003] After searching, it is found that the staplers on the market nowadays need to be reset to an open state after being fully fired. The trigger needs to be released and the operator presses the release button with one hand. The release button adjusts the backstop plate, and the backstop plate no longer has a blocking effect on the drive rod. At the same time, the operator pulls back the reset button with the other hand to reset the drive rod and restore the instrument to its initial state. The various self-locking and push-pull mechanisms inside it can easily lead to an unrecoverable state due to circuit problems. At this time, a new reset mechanism that can be quickly reset manually and is not affected by circuit and electrical components is needed to improve the safety of the device. Summary of the invention

[0004] In view of the technical problem in the prior art that when the device needs to be reset after firing and binding, it is easy to get stuck due to circuit problems, resulting in unsmooth resetting, the present invention adopts the following technical solutions:

[0005] A stapler with an auxiliary resetting mechanism comprises a driving handle, a main support inner tube is fixed to the gun head end of the driving handle, and a push-on bite tube is slidably sleeved on the circumferential outer wall of the main support inner tube; an anti-twist slider is arranged between the push-on bite tube and the main support inner tube, which can only slide axially on the outer wall of the main support inner tube and cannot rotate; an actuator is arranged at the end of the main support inner tube away from the driving handle, and the actuator comprises a steering block rotatably connected to the tube mouth of the main support inner tube and can swing horizontally back and forth, and an upper jaw splint is welded and fixed to the side of the steering block away from the driving handle, a cutting guide groove 1 is opened in the middle of the upper jaw splint, and a plurality of staggered nail holes are respectively opened on both sides of the cutting guide groove 1 on the upper jaw splint, and a nail pressing mechanism is arranged on the upper jaw splint above the nail holes ; A longitudinal hinge groove is provided on the lower surface of the steering block, and a hinge ear plate is rotatably connected in the longitudinal hinge groove, and a lower jaw plate that forms an occlusion with the upper jaw splint is fixed on the end of the hinge ear plate away from the intersection point, and two symmetrical spring grooves are provided on the upper surface of the lower jaw plate close to the end of the hinge ear plate, and a return spring is fixed between the top of the two spring grooves and the lower surface of the upper jaw splint; in the initial state, the return spring can open the upper jaw splint and the lower jaw plate to form a V-shaped structure; a nail pressing and pushing knife mechanism is slidably connected above the cutting guide groove one, and the nail pressing and pushing knife mechanism moves horizontally along the cutting guide groove one; an extension support plate of an arc-shaped structure is reserved at one end of the propulsion occlusal tube close to the hinge ear plate, and a roller is arranged on the upper surface of the extension support plate close to the hinge ear plate.

[0006] A further configuration of the present invention is that a limiting clamp is fixed to the gun head end of the driving handle, and a knob pushing device is rotatably connected inside the limiting clamp, and the knob pushing device is an overall circular ring structure, and a self-locking thread is opened on one end of the circumferential outer wall of the pushing bite tube close to the knob pushing device.

[0007] A further configuration of the present invention is that an upper hatch cover is clamped and fixed on the upper surface of the upper jaw splint, an upper lip plate is fixed on the end of the upper hatch cover away from the steering block, and the lower jaw plate as a whole is a groove-shaped slide rail structure opening downward, and a lower lip block with an arc surface in the opposite direction of the upper lip plate is fixed on the end of the lower jaw plate away from the steering block; by setting two upper lip plates and lower lip blocks that are symmetrical in arc surface, the actuator of the device can be more convenient when biting the target tissue at the beginning, and has a larger opening, which makes it easier to complete the early precise biting of the target tissue in conjunction with an endoscope.

[0008] A further configuration of the present invention is that a transfer hole is reserved at one end of the main support inner tube close to the steering block, and wire loops are provided on both sides of the transfer hole, the two wire loops are symmetrically distributed, and tight steering wires are provided in the two wire loops; wire fixing positions are fixed on the front and rear sides of the steering block, and the ends of the two steering wires away from the driving handle are fixed on the corresponding wire fixing positions; by setting up two tight steering wires, when it is necessary to control the deflection of the cutting position, it is only necessary to pull the steering wire on that side and loosen the steering wire on the other side at the same time.

[0009] A further arrangement of the present invention is that an adapter block compatible with the adapter hole is welded on the side of the steering block close to the main support inner tube, and a push rod through hole is opened on the main support inner tube above the adapter block, the push rod through hole is located just above the axis of the main support inner tube, and a cutting push rod is slidably inserted in the push rod through hole; a propulsion mechanism for pushing the cutting push rod steadily forward is provided in the driving handle; and the nail pressing and knife pushing mechanism includes a horizontal push slider fixed to the end of the cutting push rod, a knife fixing rod is fixed to the middle part of the side of the horizontal push slider away from the cutting push rod, and a knife clamping groove is opened on the circumferential outer wall of the knife fixing rod near the bottom, a vertical cutting knife is fixed in the knife clamping groove, the cutting edge of the cutting knife is in the shape of a groove and the cutting edge faces the upper lip plate; triangular wing plates are respectively provided near the front and rear ends on the side of the horizontal push slider close to the cutting push rod; it is used to normally cross all arc-shaped pressure rods when controlling the withdrawal of the nail pressing and knife pushing mechanism.

[0010] The U-shaped notch is a rectangular notch that is arranged at the bottom of the cutting knife and has an opening that is in the same direction as the blade, and a rectangular mounting socket is arranged at the bottom of the groove of the U-shaped notch, in which a magnet is inserted; a cutting guide groove 2 is arranged in the middle of the lower jaw plate, which is adapted to the width and position of the cutting guide groove 1, and the U-shaped notch of the cutting knife just passes through the cutting guide groove 2 and is exposed under the lower jaw plate when the device is closed; an I-shaped slider is slidably connected in the sliding groove of the lower jaw plate, and a waist bar of iron material is reserved in the middle of the I-shaped slider, and the diameter of the waist bar is adapted to the inner diameter of the U-shaped notch. As the cutting knife moves forward, the U-shaped notch just hooks the waist bar of the I-shaped slider, and as the nail pressing and pushing knife mechanism slides all the way, the bottom end of the cutting knife always hooks the I-shaped slider, and then the lower jaw plate and the upper jaw clamp can be tightly fitted together, ensuring that the tissue is tightly clamped near the incision during binding, thereby ensuring the accuracy and effectiveness of the binding position.

[0011] A further configuration of the present invention is that a limit block is fixed in the slide groove of the lower jaw plate at one end close to the hinged ear plate, and the shape of the limit block is adapted to the shape of the I-shaped slider, and the limit block is made of magnetic material; by setting the magnetic limit block, the I-shaped slider can be tightly fixed at the limit block, i.e., the initial position, before the cutting knife is advanced, ensuring that the subsequent advancement can engage normally, thereby cooperating with the cutting knife to tighten the lower jaw plate all the way.

[0012] A further configuration of the present invention is that an upper hatch cover is clamped and fixed on the upper surface of the upper jaw splint, and the upper hatch cover is made of a transparent PS plastic plate; two strip-shaped grooves matching the corresponding return spring diameters are opened on the lower surface of the upper jaw splint near the steering block; before operation, it can be clearly observed whether there are any obstructions above the upper jaw splint, and whether the relevant linkage mechanism is intact and operating normally, thereby ensuring that it can operate normally after being inserted into the body, and also facilitating the cleaning and disinfection work after disassembly in the later stage.

[0013] The present invention is further configured in that the nail pressing mechanism comprises a shaft rod seat fixed to the upper surface of the upper jaw splint near the oblique side of the end of the nail hole, and a shaft rod is arranged on the side of the shaft rod seat near the top end, an arc-shaped pressure rod is sleeved and fixed on the shaft rod, and a spring baffle is fixed on the side of the arc-shaped pressure rod near the middle, and a compression spring is fixed between the lower surface of the spring baffle and the upper surface of the upper jaw splint; the thickness of the arc-shaped pressure rod is less than the aperture of the nail hole, and the width of the bow-shaped nail is equal to the thickness of the arc-shaped pressure rod, so as to ensure When the arc pressure rod is subjected to the pushing force of the flat push slider in the nail pressing and pushing knife mechanism, the bow-shaped nail can be quickly squeezed out to prevent the arc pressure rod and the bow-shaped nail from being stuck in the nail-out hole and unable to reset; a horizontal T-shaped groove is opened near one end of the inner wall of the nail-out hole, and a boss block is slidably connected in the T-shaped groove, and a tightening spring is fixed between the side of the boss block away from the bow-shaped nail and the bottom of the T-shaped groove; a recessed groove is opened on the side of the boss block close to the bow-shaped nail, and a rubber block is embedded in the recessed groove.

[0014] A further configuration of the present invention is that the upper surface of the lower jaw plate is provided with nail coiling grooves on both sides of the second cutting guide groove, and each group of nail coiling grooves includes two symmetrical arc-shaped grooves, and the positions of the nail coiling grooves correspond one by one to the positions of the nail holes above; reinforcing ribs are reserved on both sides of the extension support plate, and a rubber layer is provided on the circumferential outer wall of the roller. The reinforcing ribs can increase the bending strength of the extension support plate to avoid bending of the extension support plate after multiple supports, and the roller with a rubber layer wrapped on its outer wall can not only provide a certain pre-tightening thrust when pressing the lower jaw plate upward, but also reduce the wear caused by friction.

[0015] The beneficial effects of the present invention are:

[0016] 1. Through the extended support plate and the roller at its end, when it is necessary to control the lower jaw plate to form an engagement, it is only necessary to push the engagement tube forward. At this time, the roller will contact the drooping hinged ear plate from below and slowly become horizontal, so that the lower jaw plate and the upper jaw splint can be fitted together; when it is necessary to reset, if the electric drive end is stuck, it is only necessary to pull the engagement tube backward to make the roller withdraw to the bottom of the steering block.

[0017] 2. By setting up the knob propulsion device, when it is necessary to control the opening or biting of the lower jaw plate, it can also be adjusted by manually rotating the knob propulsion device. This adjustment method is simple and quick, without the need to disassemble any parts on the driving handle, and without the need to use other auxiliary parts, thereby improving the convenience of emergency operation.

[0018] 3. The tightening mechanism formed by the tightening spring and the boss tightening block can fix the bow nail tightly above the nail hole before firing, avoiding the misalignment or falling of the bow nail in the body due to frequent shaking operation, thereby ensuring the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a stapler with an auxiliary resetting mechanism proposed by the present invention when it is closed;

[0020] Figure 2 A schematic diagram of a half-section three-dimensional structure of an actuator of a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0021] Figure 3 This is a schematic structural diagram of a stapler actuator with an auxiliary resetting mechanism proposed by the present invention after removing the upper hatch;

[0022] Figure 4 This is a schematic structural diagram of an actuator in a stapler with an auxiliary resetting mechanism proposed by the present invention after being opened;

[0023] Figure 5 It is a schematic structural diagram of a stapler with an auxiliary resetting mechanism proposed by the present invention after the actuator is opened and the upper hatch is removed;

[0024] Figure 6 A side view of the housing structure of a stapler with an auxiliary resetting mechanism proposed by the present invention and a bottom view after the actuator is opened;

[0025] Figure 7 An exploded view of an actuator in a side view of a housing structure of a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0026] Figure 8This is a schematic diagram of the assembly structure of a lower jaw plate in a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0027] Fig. 9 A bottom view of an upper jaw splint of a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0028] Fig.10 This is a schematic diagram of the assembly structure of a stapler having an auxiliary resetting mechanism proposed by the present invention;

[0029] Fig.11 A top view of an upper jaw splint and a staple pressing mechanism in a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0030] Fig.12 This is a schematic diagram of the assembly structure of a steering block in a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0031] Fig.13 An exploded view of a stapler pressing and knife pushing mechanism in a stapler with an auxiliary resetting mechanism proposed by the present invention;

[0032] Fig.14 The present invention proposes a stapler with an auxiliary resetting mechanism Fig.10 A schematic diagram of the enlarged structure at B in the middle;

[0033] Fig.15 The present invention proposes a stapler with an auxiliary resetting mechanism Fig.11 Schematic diagram of the enlarged structure at point A in the middle.

[0034] In the figure: 1. driving handle; 2. knob push device; 3. limit clamp ring; 4. push bite tube; 5. main support inner tube; 6. steering block; 601. adapter block; 602. longitudinal hinge groove; 7. reset spring; 8. upper hatch; 9. upper lip plate; 10. lower lip block; 11. roller; 12. extension support plate; 13. steering wire; 14. upper jaw splint; 141. cutting guide groove 1; 142. nail hole; 143. strip sink groove; 144. T-shaped slide groove; 15. nail push Knife mechanism; 151, knife fixing rod; 152, triangular wing plate; 16, cutting knife; 161, rectangular mounting socket; 162, U-shaped notch; 17, shaft seat; 18, bow-shaped nail; 19, nail rolling groove; 20, lower jaw plate; 2001, spring slot; 2002, cutting guide groove II; 21, I-shaped slider; 22, limit block; 23, cutting push rod; 24, arc pressure rod; 241, spring baffle; 242, boss block; 243, tightening spring; 25, hinged ear plate. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In this embodiment, refer to Figure 1-14 A stapler with an auxiliary resetting mechanism comprises a driving handle 1, a main support inner tube 5 is fixed to the gun head end of the driving handle 1, and a push-on bite tube 4 is slidably sleeved on the circumferential outer wall of the main support inner tube 5; an anti-twist slider is arranged between the push-on bite tube 4 and the main support inner tube 5, which can only slide axially on the outer wall of the main support inner tube 5 and cannot rotate; an actuator is arranged at one end of the main support inner tube 5 away from the driving handle 1, and the actuator comprises a steering block 6 which is rotatably connected to the tube mouth of the main support inner tube 5 and can swing horizontally back and forth, and an upper jaw splint 14 is welded and fixed to the side of the steering block 6 away from the driving handle 1, and the upper jaw A cutting guide groove 141 is provided in the middle of the splint 14, and a plurality of staggered nail holes 142 are provided on both sides of the cutting guide groove 141 on the upper jaw splint 14, and a bow-shaped nail 18 with a notch facing downward is clamped in each of the nail holes 142. The bow-shaped nail 18 is clamped in place before use, and it is ensured that the tip of the bow-shaped nail 18 does not protrude from the plane where the lower surface of the upper jaw splint 14 is located; a nail pressing mechanism is provided above the nail hole 142 of the upper jaw splint 14; a longitudinal hinge groove 602 is provided on the lower surface of the steering block 6, and a hinged ear plate 25 is rotatably connected in the longitudinal hinge groove 602, and the hinged ear plate 25 is far away from the upper jaw splint 14. A lower jaw plate 20 that is engaged with the upper jaw splint 14 is fixed at one end away from the intersection point, and two symmetrical spring slots 2001 are opened on the upper surface of the lower jaw plate 20 near the end of the hinged ear plate 25, and a return spring 7 is fixed between the top of the two spring slots 2001 and the lower surface of the upper jaw splint 14; in the initial state, the return spring 7 can open the upper jaw splint 14 and the lower jaw plate 20 to form a V-shaped structure; a nail pressing and pushing knife mechanism 15 is slidably connected above the cutting guide groove 141, and the nail pressing and pushing knife mechanism 15 moves horizontally along the cutting guide groove 141; the occlusal tube 4 is pushed near the hinged ear plate 25. An extended support plate 12 with an arc-shaped plate-like structure is reserved at the end, and a roller 11 is arranged on the upper surface of one end of the extended support plate 12 close to the hinged ear plate 25; through the extended support plate 12 and the roller 11 at its end, when it is necessary to control the lower jaw plate 20 to form a bite, it is only necessary to push the bite tube 4 forward, and at this time, the roller 11 will contact the drooping hinged ear plate 25 from below and slowly become horizontal, thereby allowing the lower jaw plate 20 and the upper jaw clamp 14 to complete the fit; when resetting is required, if the electric drive end is stuck, it is only necessary to pull the bite tube 4 backward to make the roller 11 withdraw to the bottom of the steering block 6.

[0037] In the present invention, a limiting clamp 3 is fixed to the gun head end of the driving handle 1, and a knob pushing device 2 is rotatably connected inside the limiting clamp 3, and the knob pushing device 2 is an overall circular ring structure, and a self-locking thread is provided on the circumferential outer wall of the pushing and biting tube 4 close to one end of the knob pushing device 2; through the set knob pushing device 2, when it is necessary to control the opening or biting of the lower jaw plate 20, it can also be adjusted by manually rotating the knob pushing device 2, and this adjustment method is simple and quick, and there is no need to disassemble any components on the driving handle 1, and there is no need to use other auxiliary components, thereby improving the convenience of emergency operation.

[0038] Please refer to Figure 7 The upper surface of the upper jaw splint 14 is clamped and fixed with an upper hatch cover 8, and an upper lip plate 9 is fixed to the end of the upper hatch cover 8 away from the steering block 6, and the lower jaw plate 20 is generally in a groove-shaped slide rail structure with an opening downward, and a lower lip block 10 with an arc surface opposite to the upper lip plate 9 is fixed to the end of the lower jaw plate 20 away from the steering block 6; by setting two upper lip plates 9 and lower lip blocks 10 with symmetrical arc surfaces, the actuator of the device can be more convenient when biting the target tissue at the beginning, with a larger opening, and it is easier to complete the early precise biting of the target tissue with the help of an endoscope.

[0039] Please refer to Figure 7-8 A transfer hole is reserved at one end of the main support inner tube 5 close to the steering block 6, and wire loops are arranged on both sides of the transfer hole, the two wire loops are symmetrically distributed, and tight steering wires 13 are arranged in the two wire loops; wire fixing positions are fixed on the front and rear sides of the steering block 6, and the ends of the two steering wires 13 away from the driving handle 1 are fixed on the corresponding wire fixing positions; by setting up two tight steering wires 13, when it is necessary to control the deflection of the cutting position, it is only necessary to pull the steering wire 13 on that side and loosen the steering wire 13 on the other side at the same time.

[0040] Please refer to Figure 7-8 and Fig.13, a transfer block 601 matched with the transfer hole is welded on one side of the steering block 6 close to the main support inner tube 5, and a push rod through hole is opened on the main support inner tube 5 above the transfer block 601, the push rod through hole is located just above the axis of the main support inner tube 5, and a cutting push rod 23 is slidably inserted in the push rod through hole; a propulsion mechanism for pushing the cutting push rod 23 to move forward steadily is provided in the driving handle 1; and the nail pressing and pushing knife mechanism 15 includes a flat push slider fixed to the end of the cutting push rod 23 A knife fixing rod 151 is fixed to the middle part of the side of the horizontal push slider away from the cutting push rod 23, and a knife clamping groove is opened near the bottom of the circumferential outer wall of the knife fixing rod 151, in which a vertical cutting knife 16 is fixed, and the blade of the cutting knife 16 is groove-shaped and faces the upper lip plate 9; a triangular wing plate 152 is respectively arranged near the front and rear ends of the side of the horizontal push slider close to the cutting push rod 23; it is used to control the nail pressing knife pushing mechanism 15 to normally cross all the arc-shaped pressure rods 24 when withdrawing.

[0041] Please refer to Fig.13 The bottom end of the cutting knife 16 is reserved with a U-shaped notch 162 with an opening in the same direction as the blade, and a rectangular mounting socket 161 is opened at the bottom of the groove of the U-shaped notch 162, and a magnet is inserted in the rectangular mounting socket 161; a cutting guide groove 2002 matching the width and position of the cutting guide groove 1 141 is opened in the middle of the lower jaw plate 20, and the U-shaped notch 162 of the cutting knife 16 passes through the cutting guide groove 2002 when the device is closed and is exposed under the lower jaw plate 20; an I-shaped slider 21 is slidably connected in the slide groove of the lower jaw plate 20, and An iron waist bar is reserved in the middle of the I-shaped slider 21, and the diameter of the waist bar is adapted to the inner diameter of the U-shaped notch 162. As the cutting knife 16 moves forward, the U-shaped notch 162 just hooks the waist bar of the I-shaped slider 21, and as the nail pressing and pushing mechanism 15 slides all the way, the bottom end of the cutting knife 16 always hooks the I-shaped slider 21, and then the lower jaw plate 20 and the upper jaw splint 14 can be tightly fitted together, ensuring that the tissue is tightly clamped near the incision during binding, thereby ensuring the accuracy and effectiveness of the binding position.

[0042] Please refer to Figure 2 and Figure 4 A limit block 22 is fixed at one end of the slide groove of the lower jaw plate 20 near the hinged ear plate 25, and the shape of the limit block 22 is adapted to the shape of the I-shaped slider 21, and the limit block 22 is made of magnetic material; by setting the magnetic limit block 22, the I-shaped slider 21 can be tightly fixed at the limit block 22, that is, the initial position, before the cutting knife 16 is advanced, ensuring that the subsequent advancement can be normally engaged, thereby cooperating with the advancement of the cutting knife 16 to tighten the lower jaw plate 20 all the way.

[0043] Please refer to Figure 7 and Fig. 9The upper hatch 8 is made of a transparent PS plastic plate; the lower surface of the upper jaw splint 14 is provided with two strip-shaped sink grooves 143 matching the diameter of the corresponding return spring 7 near the steering block 6; before operation, it can be clearly observed whether there is any obstruction above the upper jaw splint 14, and whether the relevant linkage mechanism is intact and operating normally, so as to ensure that it can operate normally after being inserted into the body, and it is also convenient for cleaning and disinfection after disassembly in the later stage.

[0044] Please refer to Figure 8-14 The nail pressing mechanism includes a shaft rod seat 17 fixed to the upper surface of the upper jaw clamp plate 14 near the oblique side of the end of the nail hole 142, and a shaft rod is arranged on the side of the shaft rod seat 17 near the top, and an arc-shaped pressure rod 24 is sleeved and fixed on the shaft rod, and a spring baffle 241 is fixed on the side of the arc-shaped pressure rod 24 near the middle, and a compression spring is fixed between the lower surface of the spring baffle 241 and the upper surface of the upper jaw clamp plate 14; the thickness of the arc-shaped pressure rod 24 is less than the aperture of the nail hole 142, and the width of the bow-shaped nail 18 is equal to the thickness of the arc-shaped pressure rod 24, so as to ensure that the arc-shaped pressure rod 24 can quickly squeeze out the bow-shaped nail 18 when it is pushed by the flat push slider in the nail pressing knife mechanism 15, so as to prevent the arc-shaped pressure rod 24 and the bow-shaped nail 18 from being squeezed. It is stuck in the nail hole 142 and cannot be reset; a horizontal T-shaped slot 144 is opened on the inner wall of the nail hole 142 near one end, and a boss block 242 is slidably connected in the T-shaped slot 144, and a clamping spring 243 is fixed between the side of the boss block 242 away from the bow nail 18 and the bottom of the T-shaped slot 144; a recessed groove is opened on the side of the boss block 242 close to the bow nail 18, and a rubber block is embedded in the recessed groove. Through the clamping mechanism formed by the clamping spring 243 and the boss block 242, the bow nail 18 can be tightly fixed above the nail hole 142 before firing, avoiding the misalignment or falling of the bow nail 18 caused by frequent shaking operations, thereby ensuring the safety of the operation.

[0045] Please refer to Figure 5 and Figure 7 The upper surface of the lower jaw plate 20 is provided with nail coil grooves 19 on both sides of the cutting guide groove 2002, and each group of nail coil grooves 19 includes two symmetrical arc-shaped grooves, and the positions of the nail coil grooves 19 correspond one by one to the positions of the nail holes 142 above; reinforcing ribs are reserved on both sides of the extension support plate 12, and the circumferential outer wall of the roller 11 is provided with a rubber layer. The reinforcing ribs can increase the bending strength of the extension support plate 12 to avoid bending of the extension support plate 12 after multiple support, and the roller 11 with a rubber layer wrapped on its outer wall can not only provide a certain pre-tightening thrust when pressing the lower jaw plate 20 upward, but also reduce the wear caused by friction.

[0046] When the device is in use, the upper jaw clamp 14 and the lower jaw plate 20 in the actuator are first kept in a clamped closed state, and the entire actuator is in a straight line state; after the actuator enters the body through the guiding mechanism, the operation can be performed with the assistance of the endoscope; at this time, the relevant knobs in the driving handle 1 can be fine-tuned to pull the two steering wires 13 in the actuator to control the clamping angle; then the bite tube 4 is pulled back and the lower surface of the hinged ear plate 25 loses resistance and is in an open state under the action of the two reset springs 7. After finding the target, the bite tube 4 is controlled to be pushed forward, and the roller 11 will resist from below. The drooping hinged ear plate 25 slowly becomes horizontal, and then the lower jaw plate 20 and the upper jaw splint 14 are fitted together; then the propulsion mechanism in the driving handle 1 can be controlled to start and fire, and as the cutting knife 16 moves forward, the U-shaped notch 162 just hooks the waist of the I-shaped slider 21, and as the nail pressing and pushing mechanism 15 slides all the way, the bottom end of the cutting knife 16 always hooks the I-shaped slider 21, and then the lower jaw plate 20 and the upper jaw splint 14 are tightly fitted together, ensuring that the tissue is tightly clamped near the incision during stapling; after stapling is completed, the actuator is opened, and after the device leaves the target tissue, it can be reset and taken out.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stapler with an auxiliary resetting mechanism, comprising a driving handle (1), a main support inner tube (5) being fixed to the gun head end of the driving handle (1), and a push-on bite tube (4) being slidably sleeved on the circumferential outer wall of the main support inner tube (5); an anti-twist slider is provided between the push-on bite tube (4) and the main support inner tube (5), characterized in that: An actuator is provided at one end of the main support inner tube (5) away from the driving handle (1), and the actuator comprises a steering block (6) rotatably connected to the tube mouth of the main support inner tube (5) and capable of swinging horizontally forward and backward, and an upper jaw splint (14) is welded and fixed on one side of the steering block (6) away from the driving handle (1), a cutting guide groove (141) is provided in the middle of the upper jaw splint (14), and a plurality of staggered nail holes (142) are provided on both sides of the cutting guide groove (141) on the upper jaw splint (14), and the nail holes (142) are each clamped with an arched nail (18) with a notch facing downward, and a nail pressing mechanism is provided on the upper jaw splint (14) above the nail holes (142); a longitudinal hinge groove (602) is provided on the lower surface of the steering block (6), and a hinge is rotatably connected in the longitudinal hinge groove (602). An ear plate (25), wherein a lower jaw plate (20) that is engaged with the upper jaw splint (14) is fixed at one end of the hinged ear plate (25) away from the intersection, and two mutually symmetrical spring slots (2001) are formed on the upper surface of the lower jaw plate (20) near the hinged ear plate (25), and a return spring (7) is fixed between the top of the two spring slots (2001) and the lower surface of the upper jaw splint (14); a nail pressing and pushing knife mechanism (15) is slidably connected above the cutting guide groove (141), and the nail pressing and pushing knife mechanism (15) moves horizontally along the cutting guide groove (141); an extension support plate (12) of an arc-shaped plate-like structure is reserved at one end of the propulsion occlusal tube (4) near the hinged ear plate (25), and a roller (11) is provided on the upper surface of one end of the extension support plate (12) near the hinged ear plate (25); An adapter hole is reserved at one end of the main support inner tube (5) close to the steering connection block (6), and wire loops are arranged on both sides of the adapter hole, the two wire loops are symmetrically distributed, and tight steering wires (13) are arranged in the two wire loops; wire fixing positions are fixed on both the front and rear sides of the steering connection block (6), and the ends of the two steering wires (13) away from the driving handle (1) are fixed on the corresponding wire fixing positions; A transfer block (601) adapted to the transfer hole is welded to one side of the steering block (6) close to the main support inner tube (5), and a push rod through hole is opened above the transfer block (601) on the main support inner tube (5), the push rod through hole is located just above the axis of the main support inner tube (5), and a cutting push rod (23) is slidably inserted in the push rod through hole; a propulsion mechanism for pushing the cutting push rod (23) forward steadily is provided in the driving handle (1); and the nail pressing and knife pushing mechanism (15) comprises A horizontal push slider is fixed to the end of the cutting push rod (23), a knife fixing rod (151) is fixed to the middle of one side of the horizontal push slider away from the cutting push rod (23), and a knife clamping groove is formed near the bottom of the circumferential outer wall of the knife fixing rod (151), a vertical cutting knife (16) is fixed in the knife clamping groove, and the cutting edge of the cutting knife (16) is in a groove shape and faces the upper lip plate (9); a triangular wing plate (152) is respectively provided near the front and rear ends of one side of the horizontal push slider near the cutting push rod (23); The bottom end of the cutting knife (16) is reserved with a U-shaped notch (162) whose opening is in the same direction as the blade, and a rectangular mounting socket (161) is opened at the bottom of the groove of the U-shaped notch (162), and a magnet is inserted into the rectangular mounting socket (161); a second cutting guide groove (2002) is opened in the middle of the lower jaw plate (20) and is compatible with the width and position of the first cutting guide groove (141), and the U-shaped notch (162) of the cutting knife (16) passes through the second cutting guide groove (2002) when the device is closed and is exposed below the lower jaw plate (20); an I-shaped slider (21) is slidably connected in the sliding groove of the lower jaw plate (20), and a waist bar made of iron is reserved in the middle of the I-shaped slider (21), and the diameter of the waist bar is compatible with the inner diameter of the U-shaped notch (162); The nail pressing mechanism comprises a shaft rod seat (17) fixed to the upper surface of the upper jaw clamp (14) near the end of the nail hole (142), and a shaft rod is arranged on the side of the shaft rod seat (17) near the top, an arc-shaped pressure rod (24) is sleeved and fixed on the shaft rod, and a spring baffle (241) is fixed on the side of the arc-shaped pressure rod (24) near the middle, and a compression spring is fixed between the lower surface of the spring baffle (241) and the upper surface of the upper jaw clamp (14); the thickness of the arc-shaped pressure rod (24) is smaller than the hole diameter of the nail hole (142). , and the width of the bow-shaped nail (18) is equal to the thickness of the arc-shaped pressure rod (24); a horizontal T-shaped slide groove (144) is opened on the inner wall of the nail hole (142) near one end, and a boss block (242) is slidably connected in the T-shaped slide groove (144), and a tightening spring (243) is fixed between the side of the boss block (242) away from the bow-shaped nail (18) and the bottom of the T-shaped slide groove (144); a sink groove is opened on the side of the boss block (242) close to the bow-shaped nail (18), and a rubber block is embedded in the sink groove.

2. The stapler with auxiliary resetting mechanism according to claim 1, characterized in that: A limit clamp (3) is fixed to the gun head end of the driving handle (1), and a knob propulsion device (2) is rotatably connected inside the limit clamp (3), and the knob propulsion device (2) is an overall annular structure, and a self-locking thread is formed on the circumferential outer wall of the propulsion bite tube (4) at one end close to the knob propulsion device (2).

3. The stapler with auxiliary resetting mechanism according to claim 1, characterized in that: An upper hatch cover (8) is fixedly connected to the upper surface of the upper jaw clamp (14), an upper lip plate (9) is fixedly connected to the end of the upper hatch cover (8) away from the steering connection block (6), and the lower jaw plate (20) is generally in the form of a groove-shaped slide rail structure with an opening facing downward, and a lower lip block (10) with an arc surface in the opposite direction of the upper lip plate (9) is fixedly connected to the end of the lower jaw plate (20) away from the steering connection block (6).

4. The stapler with auxiliary resetting mechanism according to claim 3, characterized in that: A limit block (22) is fixed in the sliding groove of the lower jaw plate (20) at one end close to the hinged ear plate (25), and the shape of the limit block (22) matches the shape of the I-shaped slider (21), and the limit block (22) is made of a magnetic material.

5. The stapler with auxiliary resetting mechanism according to claim 3, characterized in that: The upper hatch cover (8) is made of a transparent PS plastic plate; the lower surface of the upper jaw clamp (14) is provided with two strip-shaped recessed grooves (143) matching the diameters of the corresponding return springs (7) near the steering block (6).

6. The stapler with auxiliary resetting mechanism according to claim 1, characterized in that: The upper surface of the lower jaw plate (20) is provided with nail coiling grooves (19) on both sides of the second cutting guide groove (2002), and each group of nail coiling grooves (19) includes two symmetrical arc-shaped grooves, and the positions of the nail coiling grooves (19) correspond one to one with the positions of the nail outlet holes (142) above; reinforcing ribs are reserved on both sides of the extended support plate (12), and a rubber layer is provided on the circumferential outer wall of the roller (11).

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