Continuous stress application type anastomat with adjustable clamping thickness

Abstract

The utility model relates to an anastomat, in particular to a continuous stress application type anastomat with adjustable clamping thickness, which comprises a nail propping framework, a nail bin, a nail pushing sheet, a thickness adjusting component, a continuous stress application component and a resetting component, suturing nails are loaded in the nail bin; the nail pushing piece is used for pushing the suturing nails out of the nail bin from the output surface; the thickness adjusting assembly is used for adjusting the clamping distance; the continuous stress application assembly is used for pushing the nail pushing piece to move towards the nail bin; and the resetting assembly is used for resetting the anastomat. Compared with the prior art, the novel anastomat solves the problems that in the prior art, tissues with different thicknesses cannot be accurately clamped, and the handle needs to be continuously pressed to keep the clamping state, the novel anastomat achieves accurate clamping of the tissues with different thicknesses, and a doctor does not need to continuously press the handle to keep the clamping state.

Description

Technical Field

[0001] The utility model relates to a stapler, in particular to a continuously force - applying stapler with adjustable clamping thickness. Background Art

[0002] Traditional suture surgeries require manual suturing, which is a complex process and may have some complications after surgery. With the development of modern technology and technological improvements, the staplers used clinically are convenient to operate, fast in suturing, and rarely produce surgical complications. These advantages also enable the resection of tumors that could not be removed in the past. With the continuous deepening of globalization, staplers, as an efficient and accurate tissue - handling tool, are being used by more and more medical staff.

[0003] Currently, many efforts have been made to improve staplers, and remarkable results have been achieved. Various structural solutions have been designed and approved for national patents, such as "disposable stapler with automatic safety device" (CN100518669C), "disposable arc - shaped cutting and suturing device" (CN201179083Y), "a disposable stapler" (CN219516414U), etc., which have innovations in different aspects of the handle; the limited - position structure in "disposable stapler with anti - secondary - firing mechanism" (CN102772234B) can prevent the stapler from firing twice. Although the existing technology helps medical workers in different working environments to a certain extent, as a commonly used surgical instrument in vascular surgeries, gastrointestinal surgeries, etc., and one of the essential surgical instruments for specific surgeries, it still has deficiencies and needs further improvement.

[0004] For example, during the stapler surgery, medical staff first need to clamp the human tissue to be sutured before pulling the movable handle, but often encounter the problem that the tissue thickness does not match the clamping distance, which may cause an adverse effect on the anastomosis effect due to over - clamping or under - clamping. The clamping distance of the current popular linear stapler cannot be adjusted, so it cannot accurately adapt to the clamping tightness required for different clamping thicknesses of different human tissues.

[0005] In addition, "a linear stapler with a safety mechanism (CN113367752A)" mentions that after the staple is fired, it is necessary to wait for a period of time. During this period, medical staff need to keep pressing the movable handle with an appropriate force, which is inconvenient to use other surgical instruments such as needle holders and forceps with suturing thread. This makes the surgical process time - consuming and laborious, the surgical operation time is long, the surgical effect is difficult to guarantee, and it also increases the technical level and experience required for doctors to operate the instruments.

[0006] How to design a new type of stapler to accurately clamp tissues of different thicknesses, reduce the difficulty of operation, and eliminate the time-consuming and laborious problem of doctors relying on experience and feel to continuously press the handle to maintain the clamping state for tissues of different thicknesses, thereby shortening the operation time, improving operation efficiency, reducing operation risks and reducing the occurrence of postoperative complications, and ultimately improving the operation effect and patient treatment effect has become a technical problem that needs to be solved urgently. Utility Model Content

[0007] The purpose of the present utility model is to provide a continuous force-applying stapler with adjustable clamping thickness in order to solve at least one of the above problems, so as to solve the problem in the prior art that tissues of different thicknesses cannot be accurately clamped and the handle needs to be continuously pressed to maintain the clamping state. The new stapler proposed in this scheme can accurately clamp tissues of different thicknesses, reduce the difficulty of operation, and does not require doctors to rely on experience and hand feel to continuously press the handle to maintain the clamping state for tissues of different thicknesses, which is time-consuming and laborious. This shortens the operation time, improves the operation efficiency, reduces the operation risk and reduces the occurrence of postoperative complications, and ultimately improves the operation effect and the patient's treatment effect.

[0008] The purpose of the utility model is achieved through the following technical solutions:

[0009] The utility model discloses a continuous force-adding stapler with adjustable clamping thickness, comprising a staple support frame, a staple cartridge, a staple pusher, a thickness adjustment component, a continuous force-adding component and a reset component;

[0010] The staple cartridge is loaded with suture staples, and the output surface of the staple cartridge is arranged opposite to the front end of the staple support frame;

[0011] The front end of the nail pushing piece extends into the nail magazine and abuts against the suture nail, and the rear end of the nail pushing piece is movably connected to the nail abutment frame. The nail pushing piece is used to push the suture nail out of the nail magazine from the output surface;

[0012] The thickness adjustment assembly includes a reduced shaft end in front of the partition, a threaded screw, a reamer end in the rear of the partition, a dial, an active hinge crank and a driven hinge connecting rod, and the thickness adjustment assembly is used to adjust the clamping distance between the output surface of the nail magazine and the nail support frame;

[0013] The dial is driven by a gear set and a threaded screw;

[0014] The threaded lead screw is threadedly connected to the contracted end in front of the partition, and the threaded lead screw is rotatably connected to the expanded end in the rear of the partition;

[0015] The front shrinkage end of the partition is connected to the nail magazine;

[0016] The rear expanded hole end of the partition is rotatably connected to the driven hinge connecting rod;

[0017] The front shrinking end of the partition and the rear expanding end of the partition are located on the same straight line, and the rear expanding end of the partition is provided with an opening for accommodating the front shrinking end of the partition on one side facing the front shrinking end of the partition;

[0018] The driven hinge connecting rod is rotationally connected to the active hinge crank;

[0019] The active hinge crank is rotatably connected to the anvil frame;

[0020] The continuous force-adding component is arranged through the nail-pushing piece connecting rod and the nail-pushing piece transmission, and the continuous force-adding component includes a movable handle, a connecting rod, a claw reset torsion spring, a claw and a ratchet, and the continuous force-adding component is used to push the nail-pushing piece to move toward the nail magazine;

[0021] The ratchet is rotatably connected with the nail support frame and the nail pusher connecting rod, and ratchet teeth are also arranged on the ratchet, and the ratchet teeth are meshed with the pawl;

[0022] The linkage rod is arranged through a connecting rod and a ratchet transmission (the connection position between the connecting rod and the ratchet and the connection position between the nail pusher connecting rod and the ratchet should be arranged to ensure that when the ratchet is rotated by the movable handle, the nail pusher connecting rod can be driven to push the nail pusher forward);

[0023] The linkage rod and the claw are rotatably connected to the movable handle via a claw fixing rod;

[0024] The claw reset torsion spring is sleeved on the claw fixing rod, the fixed end of the claw reset torsion spring is assembled on the movable handle, and the movable end of the claw reset torsion spring is pressed toward the claw;

[0025] The resetting component is movably connected to the rear end of the anvil frame, and is used for resetting the stapler.

[0026] Preferably, the thickness adjustment assembly further comprises a retaining spring, which is sleeved on the threaded screw, and one side surface of the retaining spring abuts against the outer wall surface of the rear expansion hole end of the partition.

[0027] Preferably, the continuous force component also includes a linkage rod reset torsion spring sleeved on the claw fixing rod; the fixed end of the linkage rod reset torsion spring is assembled on the movable handle, and the movable end of the linkage rod reset torsion spring is pressed toward the linkage rod.

[0028] Preferably, the ratchet is rotatably connected to the anvil frame through a ratchet connecting screw, the ratchet connecting screw passes through the ratchet setting and is connected to a ratchet connecting nut at the end; a left ratchet compression spring is sleeved between the ratchet connecting screw and the ratchet, and a right ratchet compression spring is sleeved between the ratchet connecting nut and the ratchet, and the left ratchet compression spring and the right ratchet compression spring are used to press the ratchet together.

[0029] Preferably, the reset assembly comprises a reset twist, a reset pressure rod, a reset spring, a right reset sheet and a left reset sheet;

[0030] The reset torsion is rotatably connected to the rear end of the nail support frame, and the reset torsion is arranged through the reset pressure rod and the active hinge crank transmission;

[0031] The right reset piece and the left reset piece are movably connected to the anvil frame, and the right reset piece and the left reset piece are respectively located on both sides of the reset pressure rod;

[0032] The right reset plate and the left reset plate are also connected to the anvil frame through a reset spring.

[0033] Preferably, the stapler further comprises a staple-pushing torsion spring, one end of which is connected to the ratchet wheel, and the other end of which is pressed toward the staple-pushing plate connecting rod.

[0034] Preferably, the stapler further comprises a positioning assembly, and the positioning assembly comprises a push rod, a slot, a left positioning push knob and a right positioning push knob;

[0035] A positioning pin is also provided inside the nail magazine;

[0036] The front end of the push rod extends into the interior of the nail magazine and abuts against the positioning pin, a U-shaped groove is provided in the middle of the push rod, and an axisymmetric short pin is provided at the rear end of the push rod; the push rod is arranged between the front end of the partition and the nail pushing piece, and the push rod is connected to the nail pushing piece;

[0037] The clamping slot is rotatably connected to the anvil frame, and a push shaft is provided on the clamping slot, and the push shaft is embedded in the U-shaped slot;

[0038] The left positioning push knob and the right positioning push knob are respectively connected to the short pins on both sides of the push rod;

[0039] The positioning assembly is used to push the positioning pin out of the nail magazine from the output surface.

[0040] Preferably, the positioning pin is also sleeved with a positioning pin return spring.

[0041] Preferably, the stapler further comprises a housing;

[0042] The shell is coated on the rear part of the nail support frame, so that the thickness adjustment component, the continuous force component and the reset component are located in the coating area of the shell;

[0043] The housing is movably connected to the reset component;

[0044] The rear end of the shell is arranged as a fixed handle.

[0045] Preferably, an opening is provided on the top surface of the shell, the dial extends out of the shell from the opening, and a digital scale mark is provided on the dial;

[0046] The fixed handle is provided with anti-slip stripes;

[0047] The movable handle is provided with anti-skid leather texture.

[0048] The second aspect of the utility model discloses a method for using the continuous force-applying stapler with adjustable clamping thickness as described above, comprising the following steps:

[0049] When the stapler is not activated, there is an angle between the driven hinge connecting rod and the active hinge crank, the nail pushing piece connecting rod is located below the nail pushing piece, and the nail pushing piece connecting rod cannot push the nail pushing piece;

[0050] The clamping distance between the staple cartridge and the staple frame is pre-adjusted by turning the dial, and the movable handle is repeatedly pulled to push the active hinge crank through the ratchet, so that the driven hinge connecting rod and the active hinge crank are located on the same straight line, and the ratchet is locked with the help of the claw. At the same time, the stapler is pushed forward and the stapler enters the excitation state;

[0051] Pulling the movable handle back to reset the movable handle, the claw locks the ratchet wheel through the restoring force of the claw reset torsion spring, so that the nail pushing piece connecting rod moves to the rear end of the nail pushing piece;

[0052] The movable handle is repeatedly pulled again to drive the ratchet wheel to rotate, so that the nail-pushing piece connecting rod pushes the nail-pushing piece, and the nail-pushing piece pushes the suture nail out of the nail bin;

[0053] Pressing the reset component resets the moving components in the stapler (including the staple cartridge, the staple pushing piece, the thickness adjustment component, the staple pushing piece connecting rod, the staple pushing torsion spring, and the continuous force application component).

[0054] The working principle of the utility model is:

[0055] By turning the dial, the gear set can drive the threaded screw to rotate, and then the shrinking shaft end in front of the partition will move relative to the expanding hole end behind the partition, so as to achieve fine adjustment of the clamping distance between the nail magazine (connected to the shrinking shaft end in front of the partition) and the nail support frame (the nail support frame does not move);

[0056] During the process of repeatedly pulling the movable handle, each time the movable handle is pulled, the claw will rotate by a certain amplitude under the drive of the movable handle (claw return torsion spring) to release its lock with the ratchet. At this time, the linkage rod (driven by the movable handle (linkage rod return torsion spring)) will push the ratchet to rotate, and the claw will engage with the ratchet teeth, preventing the ratchet from reversing while not affecting the forward rotation of the ratchet (achieved through the one-way setting of the ratchet teeth); when the movable handle is released and pulled back to its initial position, under the drive of the claw return torsion spring, the claw will quickly reset and disengage from the ratchet, causing the ratchet to quickly reset.

[0057] Compared with the prior art, the present utility model has the following beneficial effects:

[0058] The present utility model adopts a thickness adjustment component to change the clamping position between the staple cartridge and the anvil frame, thereby realizing the adjustment of the clamping thickness of the tissue to be sutured; at the same time, the ratchet and claw in the continuous force application component can also achieve the purpose of saving effort, avoiding continuous pressing, so as to reduce the hand force intensity of medical staff when using the stapler, realizing slow pushing and clamping of the staples, avoiding damage to the skin tissue to be sutured caused by rapid force application, enabling the present utility model to not only meet the needs of different tissues of patients for suture thickness, but also reduce the hand force intensity of medical staff and prevent hand fatigue. Brief Description of the Drawings

[0059] Figure 1 It is a schematic side view (partial perspective) structure diagram of the stapler of the present utility model;

[0060] Figure 2 It is a schematic structure diagram of the positioning component of the present utility model on the stapler;

[0061] Figure 3 It is a schematic structure diagram of the positioning component (separation of the push rod and the card slot) of the present utility model;

[0062] Figure 4 It is a schematic structure diagram of the push rod in the positioning component of the present utility model;

[0063] Figure 5 It is a schematic structure diagram of the card slot in the positioning component of the present utility model;

[0064] Figure 6 It is a schematic side sectional view structure diagram of the staple cartridge of the present utility model;

[0065] Figure 7 It is a schematic structure diagram of the thickness adjustment component of the present utility model on the stapler;

[0066] Figure 8 It is a schematic structure diagram of the staple cartridge and the front end of the reduced shaft of the partition of the present utility model;

[0067] Figure 9 Schematic diagram of the thickness adjustment assembly (excluding the driven hinge link and the active hinge crank) of the present utility model;

[0068] Figure 10 Schematic diagram of the lead screw in the thickness adjustment assembly of the present utility model;

[0069] Figure 11 Schematic diagram of the continuous force application assembly of the present utility model on the stapler;

[0070] Figure 12 Schematic diagram of the linkage rod in the continuous force application assembly of the present utility model;

[0071] Figure 13 Schematic diagram of the claw and ratchet in the continuous force application assembly of the present utility model;

[0072] Figure 14 Schematic diagram of the linkage rod, connecting rod and ratchet in the continuous force application assembly of the present utility model;

[0073] Figure 15 Schematic diagram of the transmission mode of the continuous force application assembly and the thickness adjustment assembly of the present utility model;

[0074] Figure 16 Schematic diagram of the staple pusher link and the staple pusher torsion spring of the present utility model;

[0075] Figure 17 Schematic diagram of the stapler of the present utility model in the unactivated state;

[0076] Figure 18 Schematic diagram of the stapler of the present utility model in the activated state;

[0077] Figure 19 Schematic diagram of the reset assembly of the present utility model on the stapler;

[0078] Figure 20 Schematic diagram of the reset spring in the reset assembly of the present utility model;

[0079] Figure 21 Schematic diagram of the reset assembly (excluding the right reset piece, the left reset piece and the reset spring) of the present utility model;

[0080] Figure 22 Schematic diagram of the staple cartridge on the stapler of the present utility model;

[0081] Figure 23 Schematic diagram of the opening in the housing of the present utility model;

[0082] Figure 24Structural schematic diagram of the fixed handle in the housing of the present utility model;

[0083] Figure 25 Structural schematic diagram of the dial in the thickness adjustment component of the present utility model;

[0084] Figure 26 Structural schematic diagram of the movable handle in the continuous force application component of the present utility model;

[0085] In the figure:

[0086] 1 - Rivet skeleton;

[0087] 2 - Staple cartridge; 201 - Positioning pin; 202 - Positioning pin return spring;

[0088] 3 - Suture staple;

[0089] 4 - Pusher;

[0090] 5 - Thickness adjustment component; 501 - Shaft end with reduced diameter in front of the partition; 502 - Threaded lead screw; 503 - Bore end with enlarged diameter behind the partition; 504 - Snap ring; 505 - Small gear; 506 - Coupling shaft; 507 - Large gear; 508 - Dial; 5081 - Digital scale mark; 509 - Active hinge crank; 5091 - Shaft behind the active hinge crank; 510 - Driven hinge connecting rod;

[0091] 6 - Housing; 6001 - Fixed handle; 6002 - Anti-slip stripes; 6003 - Opening;

[0092] 7 - Pusher connecting rod;

[0093] 8 - Pusher torsion spring;

[0094] 9 - Continuous force application component; 901 - Movable handle; 9011 - Anti-slip leather pattern; 902 - Ratchet connection nut; 903 - Right ratchet compression spring; 904 - Link return torsion spring; 905 - Claw fixing rod; 906 - Link; 907 - Claw return torsion spring; 908 - Link fixing part; 909 - Claw; 910 - Connecting rod; 911 - Ratchet fixing part; 912 - Ratchet connection screw; 913 - Left ratchet compression spring; 914 - Ratchet;

[0095] 10 - Positioning component; 101 - Push rod; 102 - Card slot; 103 - Left positioning push torsion; 104 - Right positioning push torsion;

[0096] 11 - Reset component; 111 - Reset torsion; 112 - Reset pressure rod; 113 - Reset spring; 114 - Right reset piece; 115 - Left reset piece. Detailed implementation method

[0097] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0098] Embodiment 1

[0099] A continuously force - applying stapler with adjustable clamping thickness, as Figure 1-26 shown, includes an anvil skeleton 1, a staple cartridge 2, a pusher plate 4, a thickness - adjusting assembly 5, a continuously force - applying assembly 9, and a reset assembly 11;

[0100] The staple cartridge 2 is internally loaded with staples 3, and the output surface of the staple cartridge 2 is oppositely arranged with the front end of the anvil skeleton 1;

[0101] The front end of the pusher plate 4 extends into the staple cartridge 2 and abuts against the staples 3, and the rear end of the pusher plate 4 is movably connected to the anvil skeleton 1. The pusher plate 4 is used to push the staples 3 out of the staple cartridge 2 from the output surface;

[0102] The thickness - adjusting assembly 5 includes a reduced - diameter end 501 in front of the partition, a threaded lead screw 502, an enlarged - hole end 503 behind the partition, a dial 508, an active hinge crank 509, and a driven hinge link 510. The thickness - adjusting assembly 5 is used to adjust the clamping distance between the output surface of the staple cartridge 2 and the anvil skeleton 1;

[0103] The dial 508 is drivingly arranged with the threaded lead screw 502 through a gear set;

[0104] The threaded lead screw 502 is threadedly connected to the reduced - diameter end 501 in front of the partition and rotatably connected to the enlarged - hole end 503 behind the partition;

[0105] The reduced - diameter end 501 in front of the partition is connected to the staple cartridge 2;

[0106] The enlarged - hole end 503 behind the partition is rotatably connected to the driven hinge link 510;

[0107] The reduced - diameter end 501 in front of the partition and the enlarged - hole end 503 behind the partition are on the same straight line, and an opening for accommodating the reduced - diameter end 501 in front of the partition to retract is formed on one side of the enlarged - hole end 503 facing the reduced - diameter end 501 in front of the partition;

[0108] The driven hinge link 510 is rotatably connected to the active hinge crank 509;

[0109] The active hinge crank 509 is rotatably connected to the anvil skeleton 1;

[0110] The continuously force - applying assembly 9 is drivingly arranged with the pusher plate 4 through a pusher plate link 7. The continuously force - applying assembly 9 includes a movable handle 901, a linkage rod 906, a pawl return torsion spring 907, a pawl 909, and a ratchet 914. The continuously force - applying assembly 9 is used to push the pusher plate 4 towards the staple cartridge 2;

[0111] The ratchet wheel 914 is rotatably connected to the nail support frame 1 and the nail pusher connecting rod 7. The ratchet wheel 914 is also provided with ratchet teeth, and the ratchet teeth are meshed with the pawl 909.

[0112] The linkage rod 906 is arranged through the transmission of the connecting rod 910 and the ratchet 914, and the connection position between the connecting rod 910 and the ratchet 914 and the connection position between the nail pusher connecting rod 7 and the ratchet 914 are located on both sides of the connection position between the ratchet 914 and the nail support frame 1;

[0113] The linkage rod 906 and the claw 909 are rotatably connected to the movable handle 901 via the claw fixing rod 905;

[0114] The claw reset torsion spring 907 is sleeved on the claw fixing rod 905, the fixed end of the claw reset torsion spring 907 is assembled on the movable handle 901, and the movable end of the claw reset torsion spring 907 is pressed toward the claw 909;

[0115] The resetting component 11 is movably connected to the rear end of the anvil frame 1, and the resetting component 11 is used for resetting the stapler.

[0116] A method for using the above-mentioned continuous force-applying stapler with adjustable clamping thickness comprises the following steps:

[0117] When the stapler is not activated, there is an angle between the driven hinge connecting rod 510 and the active hinge crank 509, and the nail pushing piece connecting rod 7 is located below the nail pushing piece 4, so the nail pushing piece connecting rod 7 cannot push the nail pushing piece 4;

[0118] The clamping distance between the staple cartridge 2 and the staple support frame 1 is pre-adjusted by turning the dial 508, and the movable handle 901 is repeatedly turned to push the active hinge crank 509 through the ratchet 914, so that the driven hinge connecting rod 510 and the active hinge crank 509 are located on the same straight line, and the ratchet 914 is locked by the claw 909. At this time, the staple pusher 4 moves forward, and the stapler enters the excitation state;

[0119] Pulling the movable handle 901 back to reset it, the claw 909 is released from locking the ratchet 914 by the restoring force of the claw reset torsion spring 907, so that the nail pushing piece connecting rod 7 moves to the rear end of the nail pushing piece 4;

[0120] The movable handle 901 is repeatedly pulled again to drive the ratchet wheel 914 to rotate, so that the nail-pushing piece connecting rod 7 pushes the nail-pushing piece 4, and the nail-pushing piece 4 pushes the suture nail 3 out of the nail magazine 2;

[0121] Pressing the resetting component 11 resets the moving components in the stapler.

[0122] More specifically, in this embodiment:

[0123] See Figure 1 , a continuously force - applying stapler with adjustable clamping thickness, comprising a pusher plate 4, a positioning assembly 10, staples 3, a staple cartridge 2, a thickness - adjusting assembly 5, an anvil frame 1, a pusher torsion spring 8, a pusher - plate connecting rod 7, a continuously force - applying assembly 9, a housing 6, and a reset assembly 11. The pusher plate 4 is located inside the positioning assembly 10 and is connected to the positioning assembly 10. The front end of the pusher plate 4 extends into the staple cartridge 2 containing the staples 3, and the rear end of the pusher plate 4 is connected to the anvil frame 1 through a spring; the front end of the positioning assembly 10 extends into the staple cartridge 2, the thickness - adjusting assembly 5 is arranged in the middle of the positioning assembly 10, the rear end of the positioning assembly 10 is movably connected to the reset assembly 11, and the positioning assembly 10 itself is movably connected to the anvil frame 1; the thickness - adjusting assembly 5 is movably connected to the anvil frame 1; the pusher torsion spring 8 and the pusher - plate connecting rod 7 are installed on the continuously force - applying assembly 9; the continuously force - applying assembly 9 is movably installed at a position near the rear end of the anvil frame 1; the housing 6 covers the outside of the rear end of the anvil frame 1, so that the positioning assembly 10, the thickness - adjusting assembly 5, the pusher torsion spring 8, the pusher - plate connecting rod 7, the continuously force - applying assembly 9, and the reset assembly 11 are partially or entirely located inside the housing 6; the reset assembly 11 is movably connected to both the anvil frame 1 and the housing 6.

[0124] See Figure 1-5 、 Figure 8 , the positioning assembly 10 is composed of a card slot 102, a push rod 101, a left - hand positioning push torsion 103, and a right - hand positioning push torsion 104. Among them, the card slot 102 is between the thickness - adjusting assembly 5 and the reset assembly 11. The card slot 102 is an axisymmetric structure, with a push shaft (for connecting the push rod 101) arranged above it, a connecting shaft (for rotatably connecting the anvil frame 1) arranged below it, and a short shaft (for rotatably connecting the enlarged hole end 503 behind the partition of the thickness - adjusting assembly 5) arranged in the middle; the push rod 101 is an axisymmetric structure, the front end of the push rod 101 extends into the staple cartridge 2, the pusher plate 4 is arranged inside the push rod 101, a U - shaped groove is arranged in the middle of the push rod 101 (the connection between the push rod 101 and the card slot 102 is realized by embedding the push shaft into the U - shaped groove), the rear end of the push rod 101 is divided into two symmetrically left - and - right parts and short pins are symmetrically arranged at the ends, and the left - hand positioning push torsion 103 and the right - hand positioning push torsion 104 are respectively installed on the short pins. The pusher plate 4 is located inside the push rod 101, and a protrusion capable of hooking the push rod 101 is arranged at the front end of the pusher plate 4, so that the pusher plate 4 is connected to the push rod 101, and thus the pusher plate 4 can be driven to move together when the push rod 101 moves forward.

[0125] See Figure 1 、 6, a positioning pin 201 is embedded in the upper part of the staple cartridge 2, and a positioning pin return spring 202 is also wound around the positioning pin 201. After the stapler is assembled, the front end of the push rod 101 abuts against the rear end of the positioning pin 201. Then, by pushing the push rod 101, the positioning pin 201 can be pushed out of the staple cartridge 2 to position the tissue to be sutured. After the push rod 101 is retracted, the positioning pin 201 will automatically retract into the staple cartridge 2 under the elastic force of the positioning pin return spring 202. There are also staple 3 on the front end face of the staple cartridge 2, and the staple 3 is pushed by the pusher 4 to suture the tissue to be sutured. The front end face of the staple cartridge 2 is arranged opposite to the front end of the anvil frame 1, and the gap between the two is the position for clamping the tissue to be sutured.

[0126] See Figure 1-5 , before the suture starts, the left positioning push knob 103 or the right positioning push knob 104 can be toggled forward to drive the push rod 101 to move forward, so that the front end of the push rod 101 extends into the staple cartridge 2 to drive the positioning pin 201 out of the staple cartridge 2, and finally the tissue to be sutured is positioned. Then operate the thickness adjustment assembly 5 to pre-adjust the clamping thickness, and then operate the continuous force application assembly 9 to suture the tissue to be sutured. After the suture is completed, toggle the left positioning push knob 103 or the right positioning push knob 104 backward. At this time, the positioning pin 201 is driven to move backward under the restoring force of the positioning pin return spring 202, and finally withdraws from the sutured tissue and retracts into the staple cartridge 2.

[0127] See Figure 1 , Figure 7 , 9, 10, the thickness adjustment assembly 5 is composed of a dial 508, a large gear 507, a connecting shaft 506, a small gear 505, a threaded screw 502, an expanded hole end 503 at the rear of the partition, a reduced shaft end 501 at the front of the partition and a retaining spring 504, an active hinge crank 509, and a driven hinge connecting rod 510. Among them, the large gear 507 and the dial 508 are concentrically connected to the connecting shaft 506, and both are key-connected to the connecting shaft 506. The rear part (smooth section) of the threaded screw 502 is concentrically connected to the small gear 505. Further, the small gear 505 and the large gear 507 are also meshed with each other to realize transmission, and then the threaded screw 502 can be driven to rotate by turning the dial 508; the threaded screw 502 is rotatably connected to the expanded hole end 503 behind the partition in the middle part (smooth section), and the front part (threaded section, with threads) of the threaded screw 502 is threadedly connected to the reduced shaft end 501 in front of the partition; on the threaded screw 502, against the outer wall surface of the expanded hole end 503 behind the partition, a retaining spring 504 is also provided to limit the axial movement of the threaded screw 502 relative to the expanded hole end 503 behind the partition; the end of the reduced shaft end 501 in front of the partition A semicircular groove is provided, which can be assembled and connected with a nail magazine 2; the front retracted shaft end 501 of the partition and the rear reamed end 503 of the partition are on the same straight line, and the rear reamed end 503 of the partition is open to one side of the front retracted shaft end 501 of the partition, forming a cavity that can accommodate the front retracted shaft end 501 of the partition, and the relative distance between the front retracted shaft end 501 of the partition and the rear reamed end 503 of the partition can be adjusted by turning the dial 508 to drive the rotation of the threaded screw 502, thereby realizing fine adjustment of the distance between the nail magazine 2 and the nail support frame 1; the rear end of the rear reamed end 503 of the partition is also rotatably connected to the driven hinge connecting rod 510, and the driven hinge connecting rod 510 is further rotatably connected to the active hinge crank 509, and the active hinge crank 509 is further rotatably connected to the nail support frame 1 through the rear shaft 5091 of the active hinge crank. At the position of the nail pushing piece 4, multiple layers are symmetrically stacked in sequence from the inside to the outside, specifically: the nail pushing piece 4 is in the center, and outward are the push rod 101, the expanded hole end 503 at the rear of the partition / the retracted shaft end 501 at the front of the partition, and the nail support skeleton 1, wherein the nail pushing piece 4 and the push rod 101 extend into the interior of the nail magazine 2, respectively abutting the suture nail 3 and the positioning needle 201 (respectively used to push out the suture nail 3 and the positioning needle 201), the retracted shaft end 501 in front of the partition is integrally assembled and connected to the nail magazine 2 (used to push and pull the nail magazine 2 to fine-tune the distance between the nail magazine 2 and the nail support skeleton 1), and the nail support skeleton 1 extends to the front of the output face of the nail magazine 2 (used to cooperate with the nail magazine 2 to form a gap for clamping the tissue to be sutured).

[0128] Reference Figure 7 , Figure 9, rotating the dial 508 can drive the large gear 507 to rotate, the large gear 507 rotates to drive the small gear 505 meshing with it to rotate, the small gear 505 drives the threaded screw 502 to rotate, and the front and rear movement of the contraction shaft end 501 of the partition can be realized, thereby slightly changing the front and rear position of the nail magazine 2, and finally changing the clamping thickness. The advantage of using the thickness adjustment component 5 is that the front and rear position of the contraction shaft end 501 of the partition can be adjusted by turning the dial 508, thereby changing the clamping thickness of the tissue.

[0129] In addition to adjusting the clamping distance by the thickness adjustment component 5 (usually as a pre-adjustment of the spacing), the clamping distance can also be adjusted (clamping adjustment during operation) by the transmission of the thickness adjustment component 5 (driven hinge connecting rod 510 and active hinge crank 509) by the continuous force component 9. The adjustment is specifically as follows: by moving the continuous force component 9 (the rear end of the ratchet 914 is upward (such as Figure 18 The active hinge crank 509 is rotated counterclockwise (the direction shown is counterclockwise), which resists and drives the active hinge crank 509 to rotate around the rear axis 5091 of the active hinge crank, thereby driving the driven hinge connecting rod 510 to move to the same straight line as the active hinge crank 509 (at this time, the distance is the longest after being fully straightened), thereby pushing the thickness adjustment component 5 to move forward as a whole, and finally driving the staple cartridge 2 to clamp the tissue to be sutured.

[0130] See also Figure 1 , Figure 11-14, the continuous force - adding component 9 includes a claw 909, a claw fixing rod 905, a claw return torsion spring 907, a linkage rod 906, a linkage rod return torsion spring 904, a movable handle 901, a ratchet 914, a connecting rod 910, a ratchet fixing part 911, a linkage rod fixing part 908, a ratchet connecting screw 912, a left - hand ratchet pressing spring 913, a right - hand ratchet pressing spring 903, and a ratchet connecting nut 902. The claw 909 is rotatably connected to the movable handle 901 through the claw fixing rod 905; the claw return torsion spring 907 is sleeved on the claw fixing rod 905, and one end of it is installed on the movable handle 901, and the other end (the movable end) is pressed against the claw 909; the linkage rod 906 is also rotatably connected to the movable handle 901 through the claw fixing rod 905, the linkage rod return torsion spring 904 is also sleeved on the claw fixing rod 905, and one end of it is installed on the movable handle 901, and the other end (the movable end) is pressed against the linkage rod 906; one end of the connecting rod 910 is rotatably connected to the linkage rod 906 through the linkage rod fixing part 908, and the other end of the connecting rod 910 is rotatably connected to the ratchet 914 through the ratchet fixing part 911; the ratchet 914 is provided with ratchet teeth, and when the ratchet teeth are in contact with the claw 909, they mesh with each other; the ratchet 914 is rotatably connected and installed on the nail - holding frame 1 through the ratchet connecting screw 912. The end (the free end) of the ratchet connecting screw 912 is thread - connected with the ratchet connecting nut 902. A left - hand ratchet pressing spring 913 is sleeved between the head end of the ratchet connecting screw 912 and the ratchet 914, and a right - hand ratchet pressing spring 903 is sleeved between the ratchet connecting nut 902 and the ratchet 914. Thus, the left - hand ratchet pressing spring 913 and the right - hand ratchet pressing spring 903 jointly press the ratchet 914 inward (towards the center), so as to realize the lateral positioning of the ratchet 914; at the same time, when the ratchet 914 rotates, the left - hand ratchet pressing spring 913 and the right - hand ratchet pressing spring 903 will synchronously undergo a small amount of deformation under the action of friction. Therefore, after releasing the ratchet 914, the left - hand ratchet pressing spring 913 and the right - hand ratchet pressing spring 903 can also assist the ratchet 914 to return to its original position and rotate back.

[0131] See Figure 15 , Figure 16, pull the movable handle 901 backward to make it rotate counterclockwise around the claw fixing rod 905, thereby driving the link rod 910 to move through the linkage rod 906, and then driving the ratchet wheel 914 to rotate counterclockwise by a certain angle around the ratchet wheel connecting screw 912. At this time, the claw 909 tightly abuts against the ratchet teeth of the ratchet wheel 914 under the action of the claw return torsion spring 907 to prevent the ratchet wheel 914 from rotating reversely; pulling the movable handle 901 again can drive the ratchet wheel 914 to continue rotating counterclockwise by the same angle. Repeating this way, through multiple small pulling processes, the purpose of continuously driving the ratchet wheel 914 to rotate counterclockwise by repeatedly pulling the movable handle 901 is finally achieved. The automatic anti-reverse structural design formed between the claw 909 and the ratchet wheel 914 does not require the doctor to continuously press. During this period, the pulling of the movable handle 901 can be temporarily paused and then continued. If the movable handle 901 is pulled forward to make it rotate clockwise, the claw return torsion spring 907 is released and the claw 909 rotates to no longer abut against the ratchet teeth of the ratchet wheel 914. At this time, the ratchet wheel 914 returns to its initial position.

[0132] The advantage of adopting the continuous force application component 9 is that by repeatedly pulling the movable handle 901 to intermittently drive the ratchet wheel 914 to rotate, a continuous force is provided for the clamping of the tissue to be sutured. Finally, a large clamping force can be achieved by using a small hand gripping force (single time) to drive, and there is no need for the doctor to continuously press the stapler.

[0133] See Figure 16 , one end of the pusher link 7 is movably connected to the ratchet wheel 914, and the connection position of the pusher link 7 and the ratchet wheel 914 and the connection position of the link rod 910 and the ratchet wheel 914 are on both sides of the connection position of the ratchet wheel connecting screw 912 and the ratchet wheel 914. When the link rod 910 is used to drive the ratchet wheel 914 to rotate counterclockwise, the pusher link 7 can push the pusher 4 forward; the other end (free end) of the pusher link 7 is arranged towards the pusher 4. According to different states, its position is different. Specifically: in the unactivated state, the end of the free end of the pusher link 7 is located below the pusher 4 and cannot push the pusher 4 forward; in the activated state, the free end of the pusher link 7 abuts against the recess at the rear end of the pusher 4, and then the pusher 4 can be pushed forward under the movement of the pusher link 7. The pusher torsion spring 8 is sleeved on the connecting shaft for connecting the pusher link 7 and the ratchet wheel 914, and the pusher torsion spring 8 is located outside the ratchet wheel 914. One end of it is connected to the ratchet wheel 914, and the other end is pressed against the pusher link 7.

[0134] See Figure 17, the working principle of the staple pusher link 7 is as follows: When it is not in the firing state, the staple pusher 4 is in the initial position at the rear (at this time, there is an angle between the driven hinge link 510 and the active hinge crank 509 and they are not fully extended). The staple pusher link 7 cannot resist against the rear of the staple pusher 4 but can only be located below the staple pusher 4. At this time, even if the movable handle 901 is pulled, the staple pusher 4 cannot be pushed forward, and the staple pusher link 7 can only slide frictionally relative to the staple pusher 4. Refer to Figure 18 , when the thickness adjustment assembly 5 (the driven hinge link 510 and the active hinge crank 509) enters the firing state, at this time the staple pusher 4 is pushed forward to a position closer to the front by the fully extended driven hinge link 510 and the active hinge crank 509. When the movable handle 901 is pulled forward, the elastic force accumulated during the process of the staple pushing torsion spring 8 changing from the non-firing state to the firing state will be released under the drive of the rotation of the ratchet 914. Then, under the action of the elastic force, the staple pusher link 7 will pop up and the staple pusher link 7 will resist against the rear concave opening of the staple pusher 4. When the movable handle 901 is pulled back and forth again, the counterclockwise rotation of the ratchet 914 will drive the staple pusher link 7 to move and then drive the staple pusher 4 to translate forward and press against the staple 3 in the staple cartridge 2. Finally, the staple 3 pierces the tissue to be sutured held and sutures the tissue.

[0135] Refer to Figure 18-21 , the reset assembly 11 includes a reset torsion spring 111, a reset pressure rod 112, a reset spring 113, a left reset piece 115, and a right reset piece 114. The reset torsion spring 111 is movably connected to the rear of the anvil frame 1 through the shaft 5091 behind the active hinge crank; the reset pressure rod 112 is located below the reset torsion spring 111 and its rear end abuts against the lower wall surface of the reset torsion spring 111. The reset pressure rod 112 is also movably connected inside the housing 6. The reset pressure rod 112 is in a T-shaped structure, and its lower end faces (and can resist against) the active hinge crank 509 (near the position where the active hinge crank 509 is connected to the driven hinge link 510). Thus, when the reset torsion spring 111 is pressed down, the reset pressure rod 112 can be synchronously pressed down to enable the active hinge crank 509 and the driven hinge link 510 to return from the straight state to the folded state again, that is, to exit the firing state; the left reset piece 115 and the right reset piece 114 are located on both sides of the reset pressure rod 112 (and the active hinge crank 509) and are respectively movably connected to the anvil frame 1 (hemispherical grooves are provided on the anvil frame 1, and the left reset piece 115 and the right reset piece 114 are assembled in the hemispherical grooves and can rotate). The front parts of the left reset piece 115 and the right reset piece 114 are hung with the reset spring 113 and the front end of the reset spring 113 is hooked at the rear position of the anvil frame 1.

[0136] Press the reset button 111 to push the reset pressure rod 112 in contact with it downward. After that, the reset pressure rod 112 presses down the active hinge crank 509 and drives the driven hinge link 510, thereby pulling other components of the thickness adjustment assembly 5 and driving the staple cartridge 2 to move backward, finally realizing the reset of the thickness adjustment assembly 5. At this time, the left reset piece 115 and the right reset piece 114 will be simultaneously pressed down by the reset button 111, and the reset spring 113 will be simultaneously stretched. Refer to Figure 20 , one end of the reset spring 113 is hooked on the anvil skeleton 1, and the other end is hooked on the left reset piece 115 / right reset piece 114. Therefore, after the reset assembly 11 completes the reset of the stapler and removes the downward pressure applied on the reset button 111, under the action of the reset spring 113, the reset button 111 rebounds and resets under the rebound drive of the left reset piece 115 and the right reset piece 114.

[0137] See Figure 23 、 Figure 24 , an oval opening 6003 is provided above the front end of the housing 6, reserving space for the dial 508 to extend out of the housing 6; the rear part of the housing 6 is a fixed handle 6001, which cooperates with the movable handle 901 to facilitate the doctor to hold the stapler and pull the movable handle 901; the rear end face of the fixed handle 6001 (the contact surface with the hand when holding) is provided with anti-slip stripes 6002 to increase friction and improve the stability of hand operation. See Figure 25 , the dial 508 is also provided with digital scale marks 5081, which is convenient for performing appropriate pre-adjustment on the thickness adjustment assembly 5 when clamping the tissue to be sutured. See Figure 26 , the front end face of the movable handle 901 (the contact surface with the hand when holding) is provided with anti-slip leather grains 9011, which can increase friction and improve the stability of hand operation.

[0138] The specific usage method of this stapler is as follows:

[0139] 1. Remove the staple cartridge 2, turn the head of the staple cartridge 2 upward (at this time, the surface with the staple 3 faces forward and is opposite to the front end of the anvil skeleton 1), and adjust the positions of the left positioning push button and the right positioning push button. Then, clamp the two protruding cylindrical structures on the left and right outer walls of the staple cartridge 2 at the semi-circular grooves opened at the reduced shaft end 501 in front of the partition, and make the front end of the push rod 101 in the positioning assembly 10 and the pusher 4 inside it embed into the staple cartridge 2 to complete the assembly of the staple cartridge 2.

[0140] 2. Adjust the dial 508 above the housing 6 to pre-adjust the clamping thickness (the distance between the front end face (output surface) of the staple cartridge 2 and the anvil skeleton 1).

[0141] 3. Clamp the tissue to be sutured between the staple cartridge 2 and the staple support frame 1, repeatedly pull the movable handle 901 to fully extend the thickness adjustment component 4 to clamp the tissue to be sutured, push the positioning component 10 forward to extend the positioning needle 201 to position the tissue to be sutured, and the positioning component 10 simultaneously drives the staple pusher 4 forward, then pull the movable handle 901 back forward to make the staple pusher connecting rod 7 bounce up, until a "click" sound is heard, indicating that the stapler has entered the activated state.

[0142] 4. Press the movable handle 901 again and again, and under the common transmission of all components, the staple pusher 4 pushes the suture staple 3 out of the staple cartridge 2 and into the tissue to be sutured, and the suture staple 3 in the staple cartridge 2 pierces the human tissue and sutures the tissue.

[0143] 5. Press the reset button 111. Under the transmission of various components, the stapler automatically resets and retracts the positioning needle 201 and the stapler cartridge 2, releasing the tissue to be sutured.

[0144] 6. Remove the stapler and complete the operation.

[0145] During operation, the specific movements of each component are as follows:

[0146] First, when the stapler is not activated (the active hinge crank 509 and the driven hinge connecting rod 510 are broken lines), adjust the thickness adjustment component 5: according to the thickness of the tissue to be sutured and the digital scale mark 5081, turn the dial 508 to adjust the relative distance between the front end of the partition 501 and the rear end of the partition 503, so as to change the clamping distance between the front end surface of the staple cartridge 2 and the front end of the staple support frame 1;

[0147] Then, the stapler is adjusted from the unactivated state to the activated state (the active hinge crank 509 and the driven hinge connecting rod 510 are in a straight line): by repeatedly pulling the movable handle 901, the movable handle 901 rotates counterclockwise around the claw fixing rod 905 to push the connecting rod 906 upward and then push the connecting rod 910 upward, and the ratchet 914, under the push of the connecting rod 910, intermittently moves counterclockwise around the ratchet connecting screw 912, so that the rear end of the ratchet 914 pushes the active hinge crank 509 to rotate clockwise around the rear axis 5091 of the active hinge crank until the active hinge crank 509 and the driven hinge connecting rod 510 are in a straight line; at this time, the stapler enters the activated state, the staple cartridge 2 is pushed to the farthest end and clamps the tissue to be sutured together with the front end of the stapler frame 1;

[0148] Then, the positioning needle 201 is pushed out to position the tissue to be sutured: by pushing the left positioning push knob 103 and / or the right positioning push knob 104 forward, the push rod 101 is driven forward to push the positioning needle 201 out of the staple cartridge 2 and inserted into the tissue to be sutured for positioning, and at the same time, the staple pusher 4 moves forward following the push rod 101;

[0149] Then, the staples 3 are pushed out to suture the tissue to be sutured: By moving the movable handle 901 forward (in the clockwise direction around the jaw fixing rod 905), the elastic forces of the jaw return torsion spring 907 and the linkage rod return torsion spring 904 are released, and the pressure applied to the jaw 909 and the linkage rod 906 is removed to release the locking of the ratchet 914, causing the ratchet 914 to quickly return to its original position. Furthermore, the pusher spring 8 releases its elastic force to push the pusher plate linkage 7 upward, so that the free end of the pusher plate linkage 7 abuts against the rear notch of the pusher plate 4; The movable handle 901 is repeatedly moved again to make the movable handle 901 rotate counterclockwise around the jaw fixing rod 905. By pushing the linkage rod 906 and the upper push of the linkage rod 910, the ratchet 914 is driven to intermittently rotate counterclockwise. The front end of the ratchet 914 will move forward during the rotation process, and at the same time drive the pusher plate linkage 7 connected to the front end of the ratchet 914 to push forward. Furthermore, the pusher plate linkage 7 is pushed forward by the pusher plate 4 at the rear end of the pusher plate 4, so that the pusher plate 4 further pushes the staples 3 in the staple cartridge 2 out from the front end face, realizing the suture on the tissue to be sutured;

[0150] Finally, the stapler is reset: Move the movable handle 901 forward (in the clockwise direction around the jaw fixing rod 905) to reset the ratchet 914 and the pusher plate linkage 7. After losing the pressure of the pusher plate linkage 7, under the elastic force of the spring connected to the rear end of the pusher plate 4, the pusher plate 4 is reset; Subsequently, pull back the left positioning push button 103 and / or the right positioning push button 104 backward to release the pressure applied to the positioning needle 201. Under the elastic force of the positioning needle return spring 202, the positioning needle 201 retracts into the staple cartridge 2 and releases the positioning of the tissue to be sutured; Then press the reset button 111 to press down the reset lever 112 and the left reset piece 115 and the right reset piece 114. The reset lever 112 further presses down the active hinge crank 509 to make the active hinge crank 509 rotate counterclockwise around the rear shaft 5091 of the active hinge crank, and then the active hinge crank 509 pulls back the driven hinge linkage 510 to make the active hinge crank 509 and the driven hinge linkage 510 return to the folded line state. The driven hinge linkage 510 further pulls back the thickness adjustment assembly 5 and the staple cartridge 2 to reset all components of the stapler except the reset assembly 11. At the same time, the left reset piece 115 and the right reset piece 114 press down and stretch the return spring 113; Finally, release the pressure applied to the reset button 111, and the return spring 113 pulls back to make the left reset piece 115 and the right reset piece 114 push upward and prompt the reset lever 112 and the reset button 111 to reset. Thus, the stapler is completely reset.

[0151] In summary, the present utility model uses the thickness adjustment assembly 5 to change the tissue clamping thickness to meet the requirements of the surgical process when suturing tissues of different thicknesses; By using the continuous force application assembly 9, the hand force intensity of medical staff and the fatigue of long-term holding are reduced.

[0152] The above description of the embodiments is provided to enable those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A continuously force-applying stapler with adjustable clamping thickness, characterized in that, It includes a staple cartridge holder (1), a staple cartridge (2), a pusher plate (4), a thickness adjustment component (5), a continuous force application component (9), and a reset component (11); The inside of the staple cartridge (2) is loaded with suturing staples (3), and the output surface of the staple cartridge (2) is disposed opposite to the front end of the staple cartridge holder (1); The front end of the pusher plate (4) extends into the inside of the staple cartridge (2) and abuts against the suturing staples (3). The rear end of the pusher plate (4) is movably connected to the staple cartridge holder (1). The pusher plate (4) is used to push the suturing staples (3) out of the staple cartridge (2) from the output surface; The thickness adjustment component (5) includes a reduced shaft end (501) in front of the partition, a threaded lead screw (502), an enlarged hole end (503) behind the partition, a dial (508), a driving hinge crank (509), and a driven hinge connecting rod (510). The thickness adjustment component (5) is used to adjust the clamping distance between the output surface of the staple cartridge (2) and the staple cartridge holder (1); The dial (508) is drivingly arranged with the threaded lead screw (502) through a gear set; The threaded lead screw (502) is threadedly connected to the reduced shaft end (501) in front of the partition, and the threaded lead screw (502) is rotatably connected to the enlarged hole end (503) behind the partition; The reduced shaft end (501) in front of the partition is connected to the staple cartridge (2); The enlarged hole end (503) behind the partition is rotatably connected to the driven hinge connecting rod (510); The reduced shaft end (501) in front of the partition and the enlarged hole end (503) behind the partition are on the same straight line, and an opening for receiving the reduced shaft end (501) in front of the partition to retract is formed on one side of the enlarged hole end (503) behind the partition facing the reduced shaft end (501) in front of the partition; The driven hinge connecting rod (510) is rotatably connected to the driving hinge crank (509); The driving hinge crank (509) is rotatably connected to the staple cartridge holder (1); The continuous force application component (9) is drivingly arranged with the pusher plate (4) through a pusher plate connecting rod (7). The continuous force application component (9) includes a movable handle (901), a linkage rod (906), a pawl return torsion spring (907), a pawl (909), and a ratchet wheel (914). The continuous force application component (9) is used to push the pusher plate (4) to move towards the staple cartridge (2); The ratchet wheel (914) is rotatably connected to the staple cartridge holder (1) and the pusher plate connecting rod (7). The ratchet wheel (914) is also provided with ratchet teeth, and the ratchet teeth are engaged with the pawl (909); The linkage rod (906) is drivingly arranged with the ratchet wheel (914) through a connecting rod (910); The linkage rod (906) and the pawl (909) are rotatably connected to the movable handle (901) through a pawl fixing rod (905); The pawl return torsion spring (907) is sleeved on the pawl fixing rod (905). The fixed end of the pawl return torsion spring (907) is assembled on the movable handle (901), and the movable end of the pawl return torsion spring (907) presses against the pawl (909); The reset component (11) is movably connected to the rear end of the staple cartridge holder (1), and the reset component is used for the reset of the stapler.

2. The continuous force - applying stapler with adjustable clamping thickness according to claim 1, wherein, The thickness adjustment component (5) further comprises a retaining spring (504), wherein the retaining spring (504) is sleeved on the threaded screw (502), and a side surface of the retaining spring (504) abuts against an outer wall surface of the rear expansion hole end (503) of the partition.

3. The continuous force - applying stapler with adjustable clamping thickness according to claim 1, wherein, The continuous force-applying component (9) further comprises a linkage rod reset torsion spring (904) sleeved on the claw fixing rod (905); the fixed end of the linkage rod reset torsion spring (904) is assembled on the movable handle (901), and the movable end of the linkage rod reset torsion spring (904) is pressed toward the linkage rod (906).

4. A continuously force-applying stapler with adjustable clamping thickness according to claim 1, characterized in that, The ratchet (914) is rotatably connected to the anvil frame (1) via a ratchet connecting screw (912); the ratchet connecting screw (912) is arranged through the ratchet (914) and is connected to the ratchet connecting nut (902) at the end; a left ratchet compression spring (913) is sleeved between the ratchet connecting screw (912) and the ratchet (914); a right ratchet compression spring (903) is sleeved between the ratchet connecting nut (902) and the ratchet (914); the left ratchet compression spring (913) and the right ratchet compression spring (903) are used to press the ratchet (914).

5. A continuously force-applying stapler with adjustable clamping thickness according to claim 1, characterized in that The reset assembly (11) comprises a reset twist (111), a reset pressure rod (112), a reset spring (113), a right reset plate (114) and a left reset plate (115); The reset twist (111) is rotatably connected to the rear end of the nail support frame (1), and the reset twist (111) is arranged to be driven by the reset pressure rod (112) and the active hinge crank (509); The right reset plate (114) and the left reset plate (115) are movably connected to the anvil frame (1), and the right reset plate (114) and the left reset plate (115) are respectively located on both sides of the reset pressure rod (112); The right reset plate (114) and the left reset plate (115) are also connected to the anvil frame (1) via a reset spring (113).

6. The continuous force - applying stapler with adjustable clamping thickness according to claim 1, wherein The stapler further comprises a stapler-pushing torsion spring (8), one end of which is connected to the ratchet wheel (914), and the other end of which is pressed toward the stapler-pushing connecting rod (7).

7. A continuously force-applying stapler with adjustable clamping thickness according to claim 1, characterized in that, The stapler further comprises a positioning assembly (10), wherein the positioning assembly (10) comprises a push rod (101), a clamping slot (102), a left positioning push knob (103) and a right positioning push knob (104); A positioning pin (201) is also provided inside the nail magazine (2); The front end of the push rod (101) extends into the interior of the nail magazine (2) and abuts against the positioning pin (201), a U-shaped groove is provided in the middle of the push rod (101), and an axisymmetric short pin is provided at the rear end of the push rod (101); the push rod (101) is arranged between the front retracted end (501) of the partition and the nail pushing plate (4), and the push rod (101) is connected to the nail pushing plate (4); The clamping slot (102) is rotatably connected to the anvil frame (1), and a push shaft is provided on the clamping slot (102), and the push shaft is embedded in the U-shaped slot; The left positioning push button (103) and the right positioning push button (104) are respectively connected to short pins on both sides of the push rod (101); The positioning assembly (10) is used to push the positioning needle (201) out of the cartridge (2) from the output surface.

8. A continuously force-applying stapler with adjustable clamping thickness according to claim 7, characterized in that A positioning needle return spring (202) is also sleeved on the positioning needle (201).

9. A continuously force-applying stapler with adjustable clamping thickness according to claim 1, characterized in that, The stapler further includes a housing (6); The housing (6) covers the rear part of the anvil frame (1), so that the thickness adjustment assembly (5), the continuous force application assembly (9) and the reset assembly (11) are located within the covered area of the housing (6); The housing (6) is movably connected to the reset assembly (11); The rear end of the housing (6) is provided with a fixed handle (6001).

10. A continuously force-applying stapler with adjustable clamping thickness according to claim 9, characterized in that, An opening (6003) is formed on the top surface of the housing (6), the dial (508) extends out of the housing (6) from the opening (6003), and a digital scale mark (5081) is provided on the dial (508); Anti-slip stripes (6002) are provided on the fixed handle (6001); Anti-slip leather grains (9011) are provided on the movable handle (901).

Images