Stitching instrument capable of preventing nail from being stuck and using method

Abstract

The invention discloses an anti-staple-jamming stitching instrument and a using method. The anti-staple-jamming stitching instrument comprises a fixed handle, an operating handle, a frame assembly, a staple pushing assembly and a forming plate, and the staple pushing assembly at least pushes a current stitching staple to a forming area; an extrusion plate is arranged in the frame assembly or the fixed handle, is actuated by the operation handle and slides relative to the forming plate in the forming area; the nail pushing assembly comprises a guide seat, a suturing nail, a nail pushing plate and a spring, and a supporting plate is arranged on the guide seat in a sliding mode; the operating handle keeps the nail pushing assembly at the initial position and keeps the supporting plate at the stretching-out position, the supporting plate stretches out of the inner side of the suturing nail at the stretching-out position, the operating handle releases the nail pushing assembly in the actuating stroke, the guiding base drives the supporting plate to the retracting position under the action of the spring, and the supporting plate is retracted into the forming area at the retracting position. And the extrusion plate extrudes the suturing nail to be bent, so that the suturing nail is enabled to be triggered in an expected posture and a nail outlet direction.

Description

Technical Field

[0001] The present invention relates to the technical field of medical staplers, and in particular to an anti-stitch stapler and a use method thereof. Background Art

[0002] Medical manual staplers are widely used in the field of surgery, including general surgery, orthopedics, obstetrics and gynecology, etc. The market demand continues to grow, benefiting from the growing demand for surgical operations and the popularization of medical technology, and also benefiting from the patients' increasing requirements for surgical results and suture quality.

[0003] In the prior art, the Chinese utility model patent with publication number CN204542259U manually actuates the handle to push out the internal suture staples through the handle and the action part thereon, and a forming tongue is also provided in the output path of the suture staple to squeeze the suture staple into a desired shape. A spring-actuated pushing mechanism is also provided at the rear of the current suture staple, and the pushing mechanism pushes the suture staple toward the outlet when the handle is in the initial state. When the handle is pressed by the medical staff, the spring pushes the pushing mechanism away from the outlet. At this time, the suture staple at the outlet loses support behind, and there is a hidden danger of the suture staple tilting backwards during the deformation process, resulting in poor deformation quality of the suture staple, and even the suture staple is stuck. On the other hand, if the medical staff fails to actuate the handle into place in one operation during the operation, the suture staple has already undergone local deformation, and the handle returns to its position, which will cause the staple to be stuck the next time it is used, and it cannot be used normally. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the present invention is to provide a stapler that prevents staples from being stuck.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A staple-preventing suture device, comprising: A fixed handle and an operating handle that rotates relative to the fixed handle, a frame assembly disposed in the fixed handle, and a nail pushing assembly in the frame assembly, wherein a molding area is disposed at the end of the frame assembly, a molding plate is disposed in the molding area, and the nail pushing assembly at least pushes the current suture nail to the molding area; A pressing plate is provided in the frame assembly or the fixed handle, the pressing plate is actuated by the operating handle and slides relative to the forming plate in the forming area; The pin pushing assembly comprises a guide seat slidably arranged on the frame assembly, a suture pin and a pin pushing plate slidably arranged on the guide seat, and a spring abutting between the pin pushing plate and the guide seat, and a support plate slidably arranged on the guide seat; The operating handle has an initial position where it is not operated, and an actuating stroke where it is operated to rotate; The operating handle holds the nail pushing assembly in the initial position and holds the support plate in the extended position. The support plate is located in the molding area and is held between the extrusion plate and the molding plate in the extended position and extends out of the inner side of the suture nail. The operating handle releases the nail pushing assembly during the actuation stroke, and the guide seat drives the support plate to the retracted position under the action of the spring. The support plate is retracted into the molding area in the retracted position and supported on the back of the suture nail, and the extrusion plate slides toward the molding area and extrudes the suture nail to bend. The operating handle is also provided with a rotatable locking block, which cooperates with the frame assembly during the actuation stroke and keeps the operating handle and the extrusion plate in the current position. An actuating portion protrudes from the end of the frame assembly. The locking block abuts against the actuating portion at the end of the actuation stroke and deflects to disengage from the frame assembly. At the same time, the locking block is retained on the operating handle due to the deflection. During the return stroke of the operating handle, the abutting portion protruding on the locking block abuts against the actuating portion, thereby deflecting the locking block to the locked position again.

[0006] Furthermore, the suture staple has a force-bearing edge, the force-bearing edge includes a main body portion, and portions to be bent located on both sides of the main body portion, and the portions to be bent are provided with hook portions; In the initial position, the support plate is located at the connection between the main body and the part to be bent on the extension line of the extrusion direction, the extrusion plate is provided with an extrusion end facing the part to be bent, and the forming plate is supported on the main body.

[0007] Furthermore, during the actuation stroke, the support plate defines a retracted stroke between the extended position and the retracted position, and the support plate abuts against the inner side of the suture staple during the retracted stroke, and is retracted and supported on the back of the suture staple as the suture staple abuts against the forming plate.

[0008] Furthermore, the fixed handle and / or the frame assembly define an extrusion channel, and the extrusion plate is slidably disposed in the extrusion channel; the forming plate and the frame assembly define a support channel, and the support plate is slidably disposed in the support channel; The frame assembly defines a pin-pushing channel through the pin-pushing assembly, and the extrusion channel and the support channel are both arranged obliquely with respect to the pin-pushing channel and intersect in the forming area.

[0009] Furthermore, a slide groove is provided at the end of the guide seat, and an inclined portion is provided on the support plate, and the inclined portion is arranged in the slide groove; The guide seat is provided with a transmission end at the rear portion, and the operating handle is provided with a limit end, which abuts against the transmission end in the initial position and provides a force for the nail pushing assembly to move toward the forming area.

[0010] Furthermore, the extrusion plate and the forming plate are provided with first molding surfaces arranged opposite to each other corresponding to the main body part, and second molding surfaces arranged opposite to each other corresponding to the bending edge. The support plate is arranged to slide between the second molding surfaces, and the support plate is located between the first molding surfaces in the initial position.

[0011] Furthermore, a locking portion is provided on the locking block, and a locking surface is provided on the frame assembly. The locking portion and the locking surface cooperate with each other during the actuation stroke. An actuating portion is provided at the end of the locking surface. The actuating portion actuates the locking block to swing to an unlocking position at the end of the actuating stroke; and the actuating portion abuts against the locking block in the return stroke and swings the locking block to the locking position.

[0012] Furthermore, the operating handle also includes a return stroke opposite to the actuating stroke; a deformable retaining block is provided on the operating handle, and a shift block is provided on the locking block, the shift block abuts against one side of the free end of the retaining block in the initial position, and constrains the locking block on the locking surface within the actuating stroke, the shift block swings with the locking block at the end of the actuating stroke and overcomes the retaining block, and the retaining block holds the shift block in the unlocked position in a deformed posture.

[0013] Further, the actuating portion is provided with a first guide surface in the actuating stroke, the locking portion is provided with a second guide surface opposite to the first guide surface, the first guide surface and the second guide surface abut against each other at the end of the actuating stroke, and the actuating locking block is deflected to the unlocking position, the locking portion is away from the locking surface in the unlocking position, and the operating handle is allowed to return to its original position; The actuating portion also includes a first stop surface in the return stroke, the locking block is provided with an abutting portion, and the abutting portion is provided with a second stop surface. The first stop surface abuts the second stop surface in the return stroke and forces the locking block to swing so that the locking portion cooperates with the locking surface.

[0014] The present invention also provides a method for using a stapler for preventing staple jams, comprising the following steps: S1. In the initial state, the operating handle is in the initial position without being actuated, the locking block and the frame assembly cooperate in the locking position and allow the operating handle to perform the actuation stroke, the staple pusher assembly is constrained in a position close to the molding area, and the support plate is kept in the extended position, and the staple pusher plate pushes the staples to the molding area; S2, the operating handle is actuated and enters the actuation stroke. The locking block rotates synchronously with the operating handle during the actuation stroke and cooperates with the locking surface. The extrusion plate is actuated and pushes the suture nail toward the forming plate. At this time, the nail pushing assembly loses the limit of the operating handle, the spring releases the force and drives the guide seat away from the forming area, the support plate is driven to move toward the collection position, and abuts against the inner side of the suture nail during the collection stroke. S3, during the actuation stroke or at the end of the actuation stroke, the locking block abuts against the actuating portion and deflects to the unlocking position, and the shifting block overcomes the holding block, so that the holding block is warped and deformed and abuts against the shifting block, so that the locking block is kept in the unlocking position, at which time the extrusion plate abuts the suture nail against the forming plate, and the part of the suture nail to be bent is squeezed and deformed on both sides of the extrusion plate and the forming plate, thereby forming a bending edge, and the support plate slides to the retracted position and abuts against the back of the suture nail; S4. During the return stroke, the operating handle drives the locking block to return, and the locking block abuts against the actuating portion during the return stroke, forcing the locking block to deflect and slide to abut against the retaining block, and then remain in the locked position again; At the same time, the operating handle abuts against the nail pushing assembly again, and forces the support plate to extend again, and the nail pushing plate moves toward the forming area under the action of the spring, and finally outputs the formed suture nail.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: In the present invention, a support plate is provided in the forming area for sliding. The support plate is in an extended position when the operating handle is in the initial position, and is retracted in real time during the actuation stroke of the operating handle. At the same time, the suture nail is abutted against the forming plate under the action of the extrusion plate, so that the support plate can be supported on the back of the suture nail during the forming process, thereby providing reliable support during the bending and extrusion process to prevent the suture nail from being skewed under the action of the extrusion plate, and ensure that the suture nail is fired in the expected posture and nail-out direction. In the present invention, a rotatable locking block is provided on the movable operating handle, and a locking surface is provided on the fixed frame assembly. During the actuation stroke of the operating handle, the locking portion on the locking block cooperates with the locking surface, so that when the current actuation operation is not completely completed, the suture nail and the forming plate are kept in the current position, and the suture nail is prevented from being stuck due to incomplete deformation, so as to ensure that the current suture nail is fired after being fully pressed into place, thereby reducing the operating error rate of medical staff and having a high fault tolerance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention in an initial state; Figure 2 It is an internal schematic diagram of the present invention in an initial state; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the overall structure of the suture staple of the present invention after deformation; Figure 5 is an internal schematic diagram of the suture staple of the present invention after deformation; Figure 6 for Figure 5 The enlarged view of point B in the middle; Figure 7 It is a schematic diagram of the local structure of the suture staple after deformation of the present invention; Figure 8 It is a schematic diagram of the positions of the extrusion plate and the support plate when the suture staple of the present invention is deformed; Fig. 9 The figure is a schematic diagram of the position of the support plate of the present invention during the retraction process; Fig.10 It is a schematic structural diagram of the extrusion plate and the support plate when the suture staple of the present invention is deformed; Fig.11 It is a schematic diagram of another position of the extrusion plate and the support plate when the suture staple of the present invention is deformed; Fig.12 It is a structural schematic diagram of the pin push assembly of the present invention; Fig.13 is a cross-sectional view of the initial state of the present invention; Fig.14 It is a schematic diagram of a state in which the transposition block of the present invention abuts against the first matching surface; Fig.15 It is a schematic diagram of a state in which a transposition block and a second matching surface abut against each other in one embodiment of the present invention; Fig.16 It is a schematic diagram of a state in which the transposition block and the second matching surface are against each other in another embodiment of the present invention; Fig.17 It is a schematic diagram of the state when the second stop portion abuts against the first stop portion in the return stroke of the present invention; Fig.18 It is a schematic diagram of the states of the transposition block and the holding block in the actuation stroke of the present invention; Fig.19 It is a schematic diagram of the state of the locking surface and the locking portion in the actuation stroke of the present invention; In the figure: 1.Fix the handle; 2. Frame assembly; 2.1. Locking surface; 2.2. Actuating portion; 2.21. First guide surface; 2.22. First stop surface; 2.3, cabin; 2.31, first limited space; 2.32, second limited space; 3. Operating handle; 3.1. Holding block; 3.11. First mating surface; 3.12. Second mating surface; 3.13. Fixed end; 3.14. Free end; 3.15. Sliding surface; 3.2. Driving end; 3.3. Limiting end; 3.4. Travel channel; 4. Push pin assembly; 4.1. Push pin channel; 4.2. Forming plate; 4.21. Forming end; 4.3. Support plate; 4.31. Oblique pull part; 4.4. Spring; 4.5. Guide seat; 4.51. Slide groove; 4.6. Push pin plate; 4.7. Transmission end; 5. Suture staples; 5.1. Bending edge; 5.2. Stress-bearing edge; 5.21. Part to be bent; 5.22. Main body; 6. Locking block; 6.1. Locking portion; 6.11. Second guide surface; 6.2. Abutment portion; 6.21. Second stop surface; 6.3. Transposition block; 7. Extrusion plate; 7.1. Extrusion channel; 7.2. Extrusion end; 8. Molding area; 9. Support channel; 10. Pin pushing channel; 11. First molding surface; 12. Second molding surface; DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0019] like Figure 1-19 As shown, a staple-preventing stapler comprises: A fixed handle 1 and an operating handle 3 that rotates relative to the fixed handle 1, a frame assembly 2 disposed in the fixed handle 1, and a staple pusher assembly 4 in the frame assembly 2, a molding area 8 disposed at the end of the frame assembly 2, a molding plate 4.2 disposed in the molding area 8, the staple pusher assembly 4 at least pushes the current staple 5 to the molding area 8, the operating handle 3 actuates the squeezing plate 7 so that the squeezing plate 7 squeezes the staple 5 in the molding area 8 to the molding plate 4.2, and squeezes and deforms the staple 5 into a desired final posture, for example, from Figure 10 to Figure 11 It can be seen that the suture nail 5 changes from the initial posture to the final posture; A squeezing plate 7 is provided in the frame assembly 2 or the fixed handle 1. The squeezing plate 7 has a squeezing end 7.2 facing the forming area 8. The squeezing plate 7 is actuated by the operating handle 3 and slides relative to the forming plate 4.2 in the forming area 8. The squeezing plate 7 is used to transmit the actuating force during the suturing operation and exert a bending and deformation force on the current suturing nail 5. The operating handle 3 has a driving end 3.2 for actuating the squeezing plate 7. The pin pusher assembly 4 comprises a guide seat 4.5 slidably arranged on the frame assembly 2, a suture pin 5 and a pin pusher plate 4.6 slidably arranged on the guide seat 4.5, and a spring 4.4 abutting between the pin pusher plate 4.6 and the guide seat 4.5. A support plate 4.3 is slidably arranged on the guide seat 4.5, and the support plate 4.3 and the guide seat 4.5 are arranged at an angle with each other in the sliding direction, so that the support plate 4.3 is driven by the sliding of the guide seat 4.5, and the support plate 4.3 slides relatively on the guide seat 4.5, that is, the support plate 4.3 has an extended position and a retracted position relative to the molding area 8; The operating handle 3 has an initial position where it is not operated, an actuating stroke that is rotated by the actuating operation of medical personnel, and a return stroke for returning to rotation, wherein a compression spring is provided between the operating handle 3 and the fixed handle 1 or the frame assembly 2, and the compression spring is used to provide an actuating force for the operating handle 3 in the return stroke.

[0020] Optionally, the extrusion plate 7 is L-shaped, with one part used to press against the suture nail 5 and the other part used to receive the compression spring and the driving end 3.2 of the operating handle 3, so as to actuate the resetting action of the extrusion plate 7 and the operating handle 3 in the return stroke through the compression spring.

[0021] The operating handle 3 abuts against and holds the push nail assembly 4 in the initial position, and keeps the support plate 4.3 in the extended position. The support plate 4.3 is located in the forming area 8 in the extended position and is maintained between the extrusion plate 7 and the forming plate 4.2, and extends out to the inner side of the suture nail 5 to provide a limit for the inner side of the suture nail 5; the support plate 4.3 is supported on the inner side of the force-bearing edge 5.2 corresponding to the bending edge 5.1 during the extrusion stroke. Since the force-bearing edge 5.2 is bent after reaching the forming plate 4.2, the support plate 4.3 plays a certain retaining role during the extrusion stroke, so that the suture nail 5 begins to bend in the expected posture.

[0022] The operating handle 3 releases the nail pushing assembly 4 during the actuation stroke. The operating handle 3 is actuated by the medical staff to rotate and release the nail pushing assembly 4. At this time, the spring 4.4 acts on the nail pushing assembly 4 to make the nail pushing assembly 4 retreat, so that the guide seat 4.5 drives the support plate 4.3 to slide to the retracted position. The support plate 4.3 is retracted into the forming area 8 at the retracted position and supported on the back of the suture nail 5, thereby providing support for the back of the suture nail 5 during the bending stroke, preventing the suture nail 5 from deviating from the expected output direction under the action of the oblique extrusion plate 7, for example, tilting toward the inner side of the nail pushing channel 104.1, and the extrusion plate 7 slides toward the forming area 8 and squeezes the suture nail 5 to bend; Specifically, in the actuation stroke, the support plate 4.3 defines a retracted stroke between the extended position and the retracted position, and the support plate 4.3 abuts against the inner side of the suture staple 5 in the retracted stroke, and is retracted and supported on the back of the suture staple 5 as the suture staple 5 abuts against the forming plate 4.2.

[0023] like Fig. 9 As shown, in other embodiments, the inward sliding movement of the support plate 4.3 is preferably performed under the premise of abutting against the force-bearing edge 5.2, so that the suture nail 5 provides a certain holding force when being pushed and squeezed toward the forming plate 4.2.

[0024] That is to say, when the extrusion plate 7 pushes the suture nail 5 toward the forming plate 4.2, the support plate 4.3 gradually slides from the initial position to the inner side of the forming area 8 and maintains a posture of abutting against one side of the output side of the suture nail 5. When the extrusion plate 7 pushes the suture nail 5 to the forming plate 4.2 and is ready to bend, the support plate 4.3 slides in and is located at the back of the force-bearing edge 5.2 of the suture nail 5, so as to provide reliable support for the suture nail 5 during the bending process and ensure the forming posture of the suture nail 5.

[0025] Among them, the support plate 4.3 is supported on the back of the force-bearing edge 5.2 and / or the bent edge 5.1 in the retracted position. The support plate 4.3 provides stable support for the force-bearing edge 5.2 and prevents the force-bearing edge 5.2 from deforming inward under the extrusion of both sides to a certain extent. The support plate 4.3 provides stable support for the bent edge 5.1 to further provide reliable posture support for the suture nail 5 in the final posture. The support plate 4.3 can also be correspondingly arranged at the connecting position between the force-bearing edge 5.2 and the bent edge 5.1 of the suture nail 5 to provide support for the above two positions.

[0026] In this embodiment, a non-return assembly is further provided between the operating handle 3 and the frame assembly 2. The non-return assembly includes a locking block 6 rotatably arranged on the operating handle 3. The locking block 6 cooperates with the frame assembly 2 during the actuation stroke. When the actuation of the operating handle 3 is stopped, the non-return assembly keeps the operating handle 3 and the extrusion plate 7 at the current position, and allows the operating handle 3 to continue to move along the actuation stroke. If the actuation operation returns to its original position during incomplete operation, the staple pusher assembly 4 pushes the subsequent suture staple 5 toward the molding area 8, and the preceding suture staple 5 will be stuck with the subsequent suture staple 5 under incomplete deformation. The non-return assembly is used to maintain the current actuation position of the operating handle 3, the molding plate 4.2 and the staple pusher assembly 4 in real time during the actuation stroke, thereby preventing the suture staple 5 from being stuck due to incomplete actuation operation.

[0027] Among them, an actuating portion 2.2 protrudes from the end of the frame assembly 2, and the locking block 6 abuts against the actuating portion 2.2 at the end of the actuating stroke and deflects to disengage from the frame assembly 2. At the same time, the locking block 6 is retained on the operating handle 3 due to the deflection. In the return stroke of the operating handle 3, the abutting portion 6.2 protruding on the locking block 6 abuts against the actuating portion 2.2, thereby deflecting the locking block 6 to the locking position again.

[0028] The locking block 6 cooperates with the locking surface 2.1 in the locked position, and is separated from the locking surface 2.1 in the unlocked position, allowing the operating handle 3 to perform a return stroke.

[0029] (Suture staple 5) In the initial posture, the suture staple 5 has a linear force-bearing edge 5.2, with hook portions provided at both ends of the force-bearing edge 5.2, and the force-bearing edge 5.2 is perpendicular to the moving direction of the extrusion plate 7; wherein the force-bearing edge 5.2 includes a main body portion 5.22, and portions 5.21 to be bent located on both sides of the main body portion 5.22, and the hook portions are provided at the ends of the portions 5.21 to be bent.

[0030] In the final posture, the force-bearing part of the suture nail 5 is abutted by the extrusion end 7.2 and bent and deformed into Fig.10 and Fig.11 The posture shown in.

[0031] Reference Figure 8 , Fig.10 and Fig.11 The suture nail 5 is located at the initial end of the extrusion stroke, the forming plate 4.2 is located at the terminal end of the extrusion stroke, the support plate 4.3 is located between the forming plate 4.2 and the force-bearing edge 5.2 of the suture nail 5 along the extrusion direction, and the support plate 4.3 is located between the forming plate 4.2 and the edge 5.1 to be bent of the suture nail 5 along the bending direction. The bending direction is perpendicular to the extrusion direction, so that the support plate 4.3 provides a support point for the suture nail 5 during the extrusion stroke and supports the back of the suture nail 5 during the extrusion and bending process, thereby ensuring that the suture nail 5 is bent and formed in an expected posture.

[0032] Among them, after being bent and formed, the suture staple 5 receives the actuating force from the staple pusher assembly 4 through the force-bearing edge 5.2 and is fully output. On the other hand, the support plate 4.3 that is reset from the retracted position to the extended position can also output the actuating force to the formed suture staple 5 to facilitate the output of the current suture staple 5.

[0033] (Extrusion plate 7, forming plate 4.2 and support plate 4.3) from Figure 3 and Figure 6As can be seen in the figure, as a further explanation of the extrusion plate 7 and the forming plate 4.2, the fixed handle 1 and / or the frame assembly 2 define an extrusion channel 7.1, and the extrusion plate 7 is slidably arranged in the extrusion channel 7.1; the forming plate 4.2 and the frame assembly 2 define a support channel 9, and the support plate 4.3 is slidably arranged in the support channel 9; The frame assembly 2 defines a push pin channel 104.1 through the push pin assembly 4. The extrusion channel 7.1 and the support channel 9 are both inclined relative to the push pin channel 104.1 and intersect at the molding area 8. The support channel 9 is located below the push pin channel 104.1 and the extrusion channel 7.1 is located above the push pin channel 104.1.

[0034] In the initial position, the portion where the main part 5.22 and the portion to be bent 5.21 are connected defines a connection portion, the support plate 4.3 is located on the extension line of the connection portion in the extrusion direction, the extrusion plate 7 is provided with an extrusion end 7.2 facing the portion to be bent 5.21, and the forming plate 4.2 is supported on the main part 5.22.

[0035] There are two extrusion ends 7.2, the forming plate 4.2 has a forming end 4.21 located between the two extrusion ends 7.2, and the support plate 4.3 has two support ends placed between the forming end 4.21 and the extrusion end 7.2.

[0036] Reference Fig.10 As shown, specifically, the extrusion plate 7 and the forming plate 4.2 are provided with first molding surfaces 11 arranged opposite to each other corresponding to the main body 5.22, and second molding surfaces 12 arranged opposite to the bending edge 5.1, that is, the two first molding surfaces 11 are arranged relative to the extrusion direction, and the two second molding surfaces 12 are arranged perpendicular to the extrusion direction. After the extrusion plate 7 is actuated into place, the main body 5.22 of the suture nail 5 is abutted between the first molding surfaces 11, and the bending edge 5.1 of the suture nail 5 after being bent is abutted between the extrusion end 7.2 and the second molding surface 12 on the opposite side of the forming plate 4.2. Under the premise of the back support of the support plate 4.3, the bending molding quality of the suture nail 5 is further guaranteed.

[0037] Specifically, the support plate 4.3 is arranged to slide between the second molding surfaces 12, and the support plate 4.3 is located between the first molding surfaces 11 in the initial position.

[0038] (Push pin assembly 4) like Figure 3 , Figure 6 and Fig.12As shown, as a further implementation of the pin pusher assembly 4, the frame assembly 2 also includes an upper frame and a cabin 2.3, the pin pusher assembly 4 is arranged in the cabin 2.3, and the guide seat 4.5 is slidably set in the cabin 2.3, wherein one end of the pin pusher plate 4.6 abuts the suture pin 5, and the other end of the pin pusher plate 4.6 abuts the spring 4.4 in a compressed posture against the rear end of the guide seat 4.5; in the initial state, the spring 4.4 maintains a compressed posture to apply a force to the guide seat 4.5 away from the molding area 8, and the force is released when the medical staff actuates the operating handle 3; the support plate 4.3 is inserted into the end of the guide seat 4.5, and slides following the sliding of the guide seat 4.5.

[0039] As an example, the compression and release of the spring 4.4 can be achieved by the sliding of the nail pushing assembly 4. In the initial unstressed state, the operating handle 3 abuts the guide seat 4.5 in the nail-out direction. At this time, the spring 4.4 is compressed, and the support plate 4.3 is located in the initial position extending out of the forming area 8. When the operating handle 3 is actuated to perform the actuation stroke, the guide seat 4.5 loses the limit of the operating handle 3, and the spring 4.4 is released and drives the guide seat 4.5 away from the nail-out direction, so that the subsequent suture nail 5 will not affect the bending action of the current suture nail 5. At this time, the support plate 4.3 is driven and slides inward from the extended position to the retracted position, wherein, with the return operation of the operating handle 3, the guide seat 4.5 is pressed again. At this time, the spring 4.4 is compressed again and outputs an actuating force in the nail-out direction. The support plate 4.3 slides from the retracted position to the initial position again and extends out, and under the action of the nail pushing plate 4.6, the bent and formed suture nail 5 is pushed out.

[0040] like Figure 3 As shown, specifically, a first limit space 2.31 and a second limit space 2.32 are provided in the cabin 2.3, and a sliding portion placed in the first limit space 2.31 is provided at the bottom of the front end of the guide seat 4.5, so that the guide seat 4.5 is constrained to slide in the first limit space 2.31 during the actuation stroke, and the support plate 4.3 is constrained to slide in the second limit space 2.32 during the actuation stroke. Through the above improvements, excessive displacement of the guide seat 4.5 during the actuation stroke of the operating handle 3 is avoided, which affects the position stability of the support plate 4.3 when returning.

[0041] As an implementation method of transmission between the guide seat 4.5 and the support plate 4.3, a slide groove 4.51 is provided at the end of the guide seat 4.5, and an inclined portion 4.31 is provided on the support plate 4.3. The inclined portion 4.31 and the support plate 4.3 together form a "7"-shaped profile, and the support plate 4.3 is in an inclined posture so that the inclined portion 4.31 is arranged in the slide groove 4.51, and the support plate 4.3 is obliquely arranged in the support channel 9. The second limiting space 2.32 is defined between the support channel 9 and the slide groove 4.51, so as to limit the support plate 4.3. Through the above improvements, the stable and smooth movement of the nail pushing assembly 4 and the support plate 4.3 is achieved, and the position deviation of the suture nail 5 during bending and nailing is reduced.

[0042] Specifically, the cabin 2.3 and the forming plate 4.2 together define a supporting surface, which extends from the forming area 8 toward the nail-out direction and is supported in the nail-out trajectory of the suture nail 5. Through the above improvements, the bent suture nail 5 is further limited by the supporting surface to stabilize the nail-out posture of the suture nail 5.

[0043] Further references Figure 3 and Figure 6 As a further implementation of the cooperation between the operating handle 3 and the guide seat 4.5, a transmission end 4.7 is provided at the rear of the guide seat 4.5, and a limit end 3.3 is provided on the operating handle 3. The limit end 3.3 abuts against the transmission end 4.7 in the initial position and provides a force for the push pin assembly 4 to move toward the forming area 8.

[0044] The transmission end 4.7 is specifically arranged at the rear end of the guide seat 4.5. The limit end 3.3 presses and retracts the transmission end 4.7 into the cabin 2.3 in the initial state without force, and keeps the support plate 4.3 in the initial position. At this time, the spring 4.4 is compressed, and the rear end of the guide seat 4.5 is fixed under the action of the spring 4.4. The nail pusher plate 4.6 pushes the current suture nail 5 to the molding area 8 under the action of the spring 4.4; in the actuation stroke of the operating handle 3, the transmission end 4.7 extends out of the cabin 2.3, specifically in the return stroke of the operating handle 3, so as to actuate the nail pusher assembly 4 toward the molding area 8 through the again abutment between the limit end 3.3 and the transmission end 4.7, so that the support plate 4.3 and the nail pusher plate 4.6 extend toward the molding area 8 again.

[0045] (Check assembly) like Figures 13 to 19 As shown, as a further implementation of the check assembly, a locking portion 6.1 is provided on the locking block 6, and a locking surface 2.1 is provided on the frame assembly 2. The locking portion 6.1 cooperates with the locking surface 2.1 during the actuation stroke, and the current actuation positions of the operating handle 3, the forming plate 4.2 and the staple pusher assembly 4 are maintained in real time during the actuation stroke, thereby preventing the suture staple 5 from being stuck due to an incomplete actuation operation.

[0046] In this embodiment, the locking surface 2.1 is meshed with the locking portion 6.1 through teeth, and the teeth have an inclined surface facing the actuation stroke direction, so that the locking portion 6.1 can be disengaged from the teeth on the locking surface 2.1 one by one during the actuation stroke, and prevented from returning to the original position in the locked state. The teeth are specifically in an oblique upward posture conforming to the actuation direction, thereby allowing the operating handle 3 to continue to operate in the actuation direction. When returning to the original position when the actuation is incomplete, the cooperation between the locking surface 2.1 and the locking portion 6.1 plays a role in preventing the return.

[0047] Specifically, an actuating portion 2.2 is provided at the end of the locking surface 2.1. The actuating portion 2.2 is specifically located above the locking surface 2.1 and protrudes from the locking surface 2.1 within the actuating stroke. The actuating portion 2.2 actuates the locking block 6 to swing to the unlocking position at the end of the actuating stroke; and the actuating portion 2.2 abuts against the locking block 6 in the return stroke and swings the locking block 6 to the locking position, wherein the upper end of the locking block 6 has an abutting portion 6.2 protruding relative to the locking portion 6.1, and the abutting portion 6.2 abuts against the locking block 6 in the return stroke and swings the locking block 6 to the locking position.

[0048] Reference Fig.15 , wherein a first guiding surface 2.21 is provided on the actuating portion 2.2 in the actuating stroke, and the first guiding surface 2.21 is an inclined surface inclined in the direction of the actuating stroke, and can also be an arc surface, which protrudes from the locking surface 2.1 in the actuating stroke so that the locking portion 6.1 can abut against it, so that the locking block 6 produces relative rotation, and under the guidance of the first guiding surface 2.21, the locking portion 6.1 moves away from the locking surface 2.1.

[0049] Furthermore, the locking portion 6.1 is provided with a second guide surface 6.11 opposite to the first guide surface 2.21. The second guide surface 6.11 is an inclined surface connecting the locking portion 6.1 and the main body of the locking block 6, and can also be an arc surface. The first guide surface 2.21 and the second guide surface 6.11 abut against each other during the actuation stroke and force the locking block 6 to swing to an unlocked state. At this time, the transposition block 6.3 on the locking block 6 is forced to move from the first position to the second position.

[0050] Specifically, the operating handle 3 also includes a return stroke opposite to the actuation stroke; a deformable holding block 3.1 is provided on the operating handle 3, and a transposition block 6.3 is provided on the locking block 6. The transposition block 6.3 abuts against one side of the free end 3.14 of the holding block 3.1 in the initial position, thereby defining a first position of the transposition block 6.3. When the transposition block 6.3 is in the first position, the locking block 6 is constrained on the locking surface 2.1 within the actuation stroke, that is, the locking block 6 is in the locked position, and the transposition block 6.3 moves with the locking block at the end of the actuation stroke. 6 deflects and overcomes the holding block 3.1, and forces the holding block 3.1 to deform, so that the transposition block 6.3 can slide to the other side of the free end 3.14 of the holding block 3.1. At this time, the holding block 3.1 holds the transposition block 6.3 in the unlocked position in a deformed posture, and defines the second position of the transposition block 6.3. In the second position, since the holding block 3.1 is in a deformed posture, its force toward the transposition block 6.3 is conducive to keeping the transposition block 6.3 in the second position, that is, at this time, the locking block 6 is in the unlocked position.

[0051] It should be pointed out that the locking portion is away from the locking surface 2.1 in the unlocking position and allows the operating handle 3 to perform a return stroke. When the operating handle 3 is ready to reach the initial position, the abutment portion 6.2 on the locking block 6 abuts against the actuation portion 2.2 and swings the locking block 6 back to the locking position. At this time, the transposition block 6.3 follows the locking block 6 to deflect to the second position, and the holding block 3.1 is reset and abuts against the transposition block 6.3.

[0052] In this embodiment, as a further implementation of the locking block 6 and the retaining block 3.1, a first mating surface 3.11 and a second mating surface 3.12 are provided on the retaining block 3.1. The first mating surface 3.11 and the second mating surface 3.12 are preferably arranged at the end of the retaining block 3.1. The transposition block 6.3 is arranged in a triangular shape, having two adjacent inclined surfaces and a pointed convex portion between the two inclined surfaces. The transposition block 6.3 abuts against the first mating surface 3.11 in the initial state and the actuation stroke. At this time, the locking surface 2.1 remains locked with the locking portion, and at the end of the actuation stroke, overcomes the first mating surface 3.11 and moves and abuts against the second mating surface 3.12. At this time, the locking block 6 swings and causes the locking surface 2.1 to disengage from the locking portion.

[0053] Specifically, the retaining block 3.1 is deformably arranged to adapt to the locking block 6 in the unlocked state. In this way, when the transposition block 6.3 swings between the first mating surface 3.11 and the second mating surface 3.12, the retaining block 3.1 is pressed and deformed to adapt to the movement of the transposition block 6.3.

[0054] like Fig.15As shown in the figure, as an implementation method of the transposition block 6.3 and the retaining block 3.1 in the unlocked state, the second mating surface 3.12 is adjacent to the first mating surface 3.11, that is, the first mating surface 3.11 is connected to the second mating surface 3.12 and forms a step end. The transposition block 6.3 needs to overcome a certain resistance to move from the first mating surface 3.11 to the second mating surface 3.12. In this embodiment, the transposition block 6.3 follows the swing of the locking block 6 and slides directly from the first mating surface 3.11 to the second mating surface 3.12. During the return stroke, the retaining block 3.1 is pressed by the displacement block 6.3 and deformed upward, preferably, the pointed convex part of the displacement block 6.3 contacts the second mating surface 3.12. At this time, due to the restoring force of the retaining block 3.1 itself, the displacement block 6.3 and the retaining block 3.1 are in a relatively unstable abutment state, so that when the operating handle 3 moves to the end of the return stroke, under the abutment action of the first stop surface 2.22 and the second stop surface 6.21, the locking block 6 can easily swing back from the second mating surface 3.12 to the second mating surface 3.12.

[0055] like Fig.16 As shown, as another embodiment of the transposition block 6.3 and the retaining block 3.1 in the unlocked state, the second mating surface 3.12 is arranged at intervals from the first mating surface 3.11, that is, the first mating surface 3.11 and the second mating surface 3.12 are two opposite profiles on the end of the retaining block 3.1, and a sliding surface 3.15 connected to each other is arranged between the first mating surface 3.11 and the second mating surface 3.12, and the first mating surface 3.11 is connected to the second mating surface 3.12 and the sliding surface 3.15. In this process, The transposition block 6.3 follows the swing of the locking block 6. The transposition block 6.3 needs to overcome the first mating surface 3.11 and slide on the sliding surface 3.15. During this process, the retaining block 3.1 is pressed by the transposition block 6.3 and deforms and warps upward until the transposition block 6.3 slides to the second mating surface 3.12. At this time, the retaining block 3.1 returns and positions the transposition block 6.3 on the second mating surface 3.12 to keep the locking block 6 in the unlocked state and prevent the locking block 6 from returning to the locked state. In this embodiment, the stability of the unlocked state can be ensured during the return stroke.

[0056] As a further explanation of the retaining block 3.1, the retaining block 3.1 has a fixed end 3.13 connected to the operating handle 3, and a free end 3.14 movable relative to the operating handle 3. The retaining block 3.1 is specifically an arm extending from an end away from the locking block 6 toward the locking block 6, so that the retaining block 3.1 is lifted up under the abutment of the transposition block 6.3, and a travel channel 3.4 for the locking block 6 to slide therein is spaced between the retaining block 3.1 and the operating handle 3. The first mating surface 3.11 and the second mating surface 3.12 are located in the travel channel 3.4. The travel channel 3.4 is specifically L-shaped, the transposition block 6.3 is constrained to slide in the travel channel 3.4, and the transposition block 6.3 extends into the travel channel 3.4, so that the operating handle 3 can drive the locking block 6 to move synchronously when it rotates. At the same time, the slider is provided with a shaft portion passing through the operating handle 3.

[0057] The first mating surface 3.11 and the second mating surface 3.12, or the first mating surface 3.11, the second mating surface 3.12 and the sliding surface 3.15 are all arranged on the free end 3.14, and the travel channel 3.4 is defined between the free end 3.14 and the fixed end 3.13.

[0058] from Fig.18 It can be seen that in the above embodiment, the portion of the transposition block 6.3 extending into the travel channel 3.4 is defined as an extension portion, a first limiting plane arranged in a plane is provided in the travel channel 3.4, and a second limiting plane is provided at the bottom of the extension portion. In the unlocked state, the first limiting plane is against the second limiting plane, and at this time, the retaining block 3.1 applies a downward force to the transposition block 6.3 in a tilted posture, thereby improving the position reliability of the locking block 6 in the unlocked state.

[0059] The actuating portion 2.2 further includes a first stop surface 2.22 in the return stroke. The abutting portion 6.2 is specifically located at the upper end of the locking block 6 and protrudes from the locking portion 6.1 in the direction toward the actuating portion 2.2. A second stop surface 6.21 is provided on the abutting portion 6.2. The first stop surface 2.22 abuts against the second stop surface 6.21 in the return stroke and forces the locking block 6 to swing so that the locking portion 6.1 cooperates with the locking surface 2.1.

[0060] Preferably, in order to ensure that the abutting portion 6.2 on the locking block 6 and the actuating portion 2.2 on the frame assembly 2 can reliably abut against each other during the return stroke to cause the locking block 6 to return to the locked state, the first stop surface 2.22 and the second stop surface 6.21 are set to be planes, such as Fig.17 As shown, during the return stroke, the second stop surface 6.21 gradually switches from a posture of forming an angle with the first stop surface 2.22 to a posture of plane contact with each other as the second stop surface 6.21 swings as the return stroke occurs.

[0061] In the above embodiment, during the actuation stroke, the locking portion 6.1 of the locking block 6 cooperates with the locking surface 2.1 of the frame assembly 2 to prevent the operating handle 3 from returning to its original position. At the end of the actuation stroke, the first guide surface 2.21 on the actuating portion 2.2 abuts against the second guide surface 6.11 on the locking block 6, and forces the locking block 6 to deflect. At this time, the locking block 6 rotates to the unlocked state, that is, the locking surface 2.1 and the locking portion 6.1 move away from each other, and the transposition block 6.3 on the locking block 6 presses the retaining block 3.1, and the transposition block 6.3 moves from the first mating surface 3.11 to the second mating surface 3.12, and the retaining block 3.1 is locked. .1 is tilted and exerts a force to keep the shift block 6.3 in the unlocked state, and then the operating handle 3 is reset. In the return stroke, the second stop surface 6.21 on the locking block 6 abuts against the first stop surface 2.22 on the actuating block, and forces the locking block 6 to return and rotate to the locked state. At this time, the shift block 6.3 presses the retaining block 3.1 in the opposite direction and abuts against the first matching surface 3.11 again. At this time, the operating handle 3 returns to its position, thereby realizing non-return in the actuating stroke of the operating handle 3, and after completing the actuating operation, the operating handle 3 is kept in a stable unlocked state and returned, with smooth operation and simple structure.

[0062] The present invention also provides a method for using a stapler for preventing staple jams, comprising the following steps: S1. In the initial state, the operating handle 3 is in the initial position without being actuated, the locking block 6 cooperates with the frame assembly 2 in the locking position and allows the operating handle 3 to perform the actuation stroke, the staple pusher assembly 4 is constrained in a position close to the molding area 8, and the support plate 4.3 is kept in the extended position, and the staple pusher plate 4.6 pushes the suture staple 5 to the molding area 8; S2, the operating handle 3 is actuated and enters the actuation stroke. The locking block 6 rotates synchronously with the operating handle 3 during the actuation stroke and cooperates with the locking surface 2.1. The extrusion plate 7 is actuated and pushes the suture nail 5 toward the forming plate 4.2. At this time, the nail pushing assembly 4 loses the limit of the operating handle 3, the spring 4.4 releases the force and drives the guide seat 4.5 away from the forming area 8, and the support plate 4.3 is driven to move toward the collection position and abuts against the inner side of the suture nail 5 during the collection stroke. S3, during the actuation stroke or at the end of the actuation stroke, the locking block 6 abuts against the actuating portion 2.2 and deflects to the unlocking position, and the displacement block 6.3 overcomes the holding block 3.1, so that the holding block 3.1 is warped and abuts against the displacement block 6.3, so that the locking block 6 is kept in the unlocking position, at which time the extrusion plate 7 abuts the suture nail 5 against the forming plate 4.2, and the portion 5.21 to be bent of the suture nail 5 is squeezed and deformed on both sides of the extrusion plate 7 and the forming plate 4.2, thereby forming a bent edge 5.1, and the support plate 4.3 slides to the retracted position and abuts against the back of the suture nail 5; S4. In the return stroke, the operating handle 3 drives the locking block 6 to return, and the locking block 6 abuts against the actuating portion 2.2 in the return stroke, and forces the locking block 6 to deflect and slide to abut against the retaining block 3.1, and remain in the locked position again; At the same time, the operating handle 3 abuts against the staple pusher assembly 4 again, and forces the support plate 4.3 to extend again, and the staple pusher plate 4.6 moves toward the forming area 8 under the action of the spring 4.4, and finally outputs the formed suture staples 5.

[0063] In step S1: The extrusion plate 7 is spaced apart from the suture nails 5 in the current forming area 8, and the support plate 4.3 is spaced apart from the forming plate 4.2 and the suture nails 5 in the extended position, and the suture nails 5 are supported on the support plate 4.3; The limiting end 3.3 on the operating handle 3 abuts against the limiting end 3.3 on the guide seat 4.5 and enters into the cabin 2.3; The locking portion 6.1 on the locking block 6 is meshed with the locking surface 2.1 of the frame assembly 2 through teeth, and the displacement block 6.3 abuts against the first matching surface 3.11 on the retaining block 3.1.

[0064] In step S2: The limiting end 3.3 on the operating handle 3 is away from the limiting end 3.3 on the guide seat 4.5, so that the spring 4.4 is released and the guide seat 4.5 is actuated in a direction away from the molding area 8, and the support plate 4.3 slides from the extended position to the retracted position; The second guide surface 6.11 on the locking portion 6.1 abuts against the first guide surface 2.21 on the actuating portion 2.2, and the locking block 6 begins to swing toward the unlocking position, and the displacement block 6.3 abuts against the first matching surface 3.11 and forces the retaining block 3.1 to warp.

[0065] In step S3: The first guide surface 2.21 is disengaged from the second guide surface, the locking block 6 is located in the unlocking position, and the displacement block 6.3 forces the retaining block 3.1 to tilt and slide to the second position of the second matching surface 3.12. At this time, the locking block 6 is maintained in the unlocking position, allowing the operating handle 3 to perform the return stroke; The bent edge 5.1 of the suture staple 5 is abutted between the two second shaping surfaces 12, and the force-bearing edge 5.2 of the suture staple 5 is abutted between the two first shaping surfaces 11, so that the suture staple 5 is squeezed into a final posture.

[0066] In step S4: The second stop surface 6.21 on the abutting portion 6.2 follows the rotation of the operating handle 3 and abuts against the first stop surface 2.22 on the actuating portion 2.2. As the operating handle 3 continues to return, the locking block 6 is forced to return and swing toward the locking position under the condition that the first stop surface 2.22 abuts against the second stop surface 6.21, until the locking portion 6.1 is engaged with the initial end of the locking surface 2.1. At this time, the transposition block 6.3 slides toward the first matching surface 3.11, and under the reset force of the retaining block 3.1, the transposition block 6.3 abuts against the first matching surface 3.11 again; The limit end 3.3 on the operating handle 3 abuts the limit end 3.3 on the guide seat 4.5 into the cabin 2.3 again, the support plate 4.3 slides to the extended position and abuts against the formed suture nail 5, and the nail pushing plate 4.6 abuts toward the suture nail 5 under the action of the spring 4.4, and the formed suture nail 5 is pushed out under the joint action of the nail pushing plate 4.6 and the support plate 4.3, and the subsequent suture nail 5 is pushed to the forming area 8.

[0067] In step S1 to step S3, if the medical staff lets go before the actuation operation is completely completed, the operating handle 3 is ready to return under the action of the compression spring. At this time, the locking portion 6.1 is engaged with the teeth of the locking surface 2.1, and the transposition block 6.3 is abutted against the first matching surface 3.11 of the retaining block 3.1 to prevent the operating handle 3 from returning, so that the suture staple 5 and the forming plate 4.2 maintain the current position, avoiding the suture staple 5 from being stuck due to incomplete deformation. At the same time, the medical staff can actuate the operating handle 3 again at the current position to continue the current operation of the suture staple 5.

[0068] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A stapler that prevents staples from getting stuck, characterized in that: include: A fixed handle (1) and an operating handle (3) that rotates relative to the fixed handle (1), a frame assembly (2) arranged in the fixed handle (1), and a nail pushing assembly (4) in the frame assembly (2), wherein a molding area (8) is provided at the end of the frame assembly (2), a molding plate (4.2) is provided in the molding area (8), and the nail pushing assembly (4) at least pushes the current suture nail (5) to the molding area (8); A pressing plate (7) is provided in the frame assembly (2) or the fixed handle (1), wherein the pressing plate (7) is actuated by the operating handle (3) and slides relative to the forming plate (4.2) in the forming area (8); The pin pushing assembly (4) comprises a guide seat (4.5) slidably arranged on the frame assembly (2), a suture pin (5) and a pin pushing plate (4.6) slidably arranged on the guide seat (4.5), and a spring (4.4) abutting between the pin pushing plate (4.6) and the guide seat (4.5); a support plate (4.3) is slidably arranged on the guide seat (4.5); The operating handle (3) has an initial position where it is not operated, and an actuating stroke where it is operated to rotate; The operating handle (3) holds the push-pin assembly (4) in the initial position and holds the support plate (4.3) in the extended position. The support plate (4.3) is located in the molding area (8) and is held between the extrusion plate (7) and the molding plate (4.2) in the extended position and extends out from the inner side of the suture pin (5). The operating handle (3) releases the push-pin assembly (4) during the actuation stroke, and the guide seat (4.5) drives the support plate (4.3) to the retracted position under the action of the spring (4.4). The support plate (4.3) is retracted into the molding area (8) in the retracted position and is supported on the back of the suture pin (5). The extrusion plate (7) slides toward the molding area (8) and extrudes the suture pin (5) to bend. The operating handle (3) is also provided with a rotatable locking block (6), which cooperates with the frame assembly (2) during the actuation stroke and keeps the operating handle (3) and the extrusion plate (7) at the current position.

2. The anti-stapling stapler according to claim 1, characterized in that: The suture staple (5) has a force-bearing edge (5.2), the force-bearing edge (5.2) comprises a main body portion (5.22), and portions to be bent (5.21) located on both sides of the main body portion (5.22), and the portions to be bent (5.21) are provided with hook portions; In the initial position, the support plate (4.3) is located at the connection portion between the main part (5.22) and the part to be bent (5.21) on the extension line of the extrusion direction, the extrusion plate (7) is provided with an extrusion end (7.2) facing the part to be bent (5.21), and the forming plate (4.2) is supported on the main part (5.22).

3. The anti-stitching stapler according to claim 1, characterized in that: During the actuation stroke, the support plate (4.3) defines a retracted stroke between the extended position and the retracted position, and the support plate (4.3) abuts against the inner side edge of the suture staple (5) during the retracted stroke, and is retracted and supported on the back of the suture staple (5) as the suture staple (5) abuts against the forming plate (4.2).

4. The anti-stitching stapler according to claim 1, characterized in that: The fixed handle (1) and / or the frame assembly (2) define an extrusion channel (7.1), and the extrusion plate (7) is slidably arranged in the extrusion channel (7.1); the forming plate (4.2) and the frame assembly (2) define a support channel (9), and the support plate (4.3) is slidably arranged in the support channel (9); The frame assembly (2) defines a pin pushing channel (10) (4.1) through the pin pushing assembly (4), and the extrusion channel (7.1) and the support channel (9) are both arranged obliquely with respect to the pin pushing channel (10) (4.1) and intersect at the molding area (8).

5. The anti-stapling stapler according to claim 1, characterized in that: The end of the guide seat (4.5) is provided with a slide groove (4.51), the support plate (4.3) is provided with an inclined portion (4.31), and the inclined portion (4.31) is arranged in the slide groove (4.51); The guide seat (4.5) is provided with a transmission end (4.7) at the rear, and the operating handle (3) is provided with a limit end (3.3). The limit end (3.3) abuts against the transmission end (4.7) in the initial position and provides a force for the nail pushing assembly (4) to move toward the molding area (8).

6. The anti-stitching stapler according to claim 1, characterized in that: The extrusion plate (7) and the forming plate (4.2) are provided with first molding surfaces (11) arranged opposite to each other corresponding to the main body portion (5.22), and second molding surfaces (12) arranged opposite to each other corresponding to the bending edge (5.1); the support plate (4.3) is arranged to slide between the second molding surfaces (12), and the support plate (4.3) is located between the first molding surfaces (11) in an initial position.

7. The anti-stitching stapler according to claim 1, characterized in that: The locking block (6) is provided with a locking portion (6.1), the frame assembly (2) is provided with a locking surface (2.1), the locking portion (6.1) and the locking surface (2.1) cooperate with each other in an actuation stroke, an actuating portion (2.2) is provided at the end of the locking surface (2.1), the actuating portion (2.2) actuates the locking block (6) to swing to an unlocking position at the end of the actuating stroke; and the actuating portion (2.2) abuts against the locking block (6) in a return stroke and swings the locking block (6) to a locking position.

8. The anti-stitching stapler according to claim 7, characterized in that: The operating handle (3) also includes a return stroke opposite to the actuation stroke; a deformable retaining block (3.1) is provided on the operating handle (3); a displacement block (6.3) is provided on the locking block (6); the displacement block (6.3) abuts against one side of a free end (3.14) of the retaining block (3.1) in an initial position and constrains the locking block (6) on a locking surface (2.1) within the actuation stroke; the displacement block (6.3) swings with the locking block (6) at the end of the actuation stroke and overcomes the retaining block (3.1); the retaining block (3.1) retains the displacement block (6.3) in an unlocked position in a deformed posture.

9. The anti-stitching stapler according to claim 8, characterized in that: The actuating portion (2.2) is provided with a first guide surface (2.21) in the actuating stroke, and the locking portion (6.1) is provided with a second guide surface (6.11) opposite to the first guide surface (2.21); the first guide surface (2.21) and the second guide surface (6.11) abut against each other at the end of the actuating stroke, and actuate the locking block (6) to swing to an unlocking position; the locking portion is away from the locking surface (2.1) in the unlocking position, and allows the operating handle (3) to return to its original position; The actuating portion (2.2) further comprises a first stop surface (2.22) in the return stroke, the locking block (6) is provided with an abutting portion (6.2), the abutting portion (6.2) is provided with a second stop surface (6.21), the first stop surface (2.22) and the second stop surface (6.21) abut against each other in the return stroke and force the locking block (6) to swing, so that the locking portion (6.1) cooperates with the locking surface (2.1).

10. A method for using the anti-stitching stapler according to any one of claims 8 to 9, characterized in that: The following steps are involved: S1. In the initial state, the operating handle (3) is in an initial position that is not actuated, the locking block (6) cooperates with the frame assembly (2) in a locked position and allows the operating handle (3) to perform an actuation stroke, the staple pusher assembly (4) is constrained in a position close to the molding area (8), and the support plate (4.3) is kept in an extended position, and the staple pusher plate (4.6) pushes the suture staples (5) to the molding area (8); S2, the operating handle (3) is actuated and enters the actuation stroke. The locking block (6) rotates synchronously with the operating handle (3) during the actuation stroke and cooperates with the locking surface (2.1). The extrusion plate (7) is actuated and pushes the suture nail (5) toward the forming plate (4.2). At this time, the nail pushing assembly (4) loses the limit of the operating handle (3). The spring (4.4) releases the force and drives the guide seat (4.5) away from the forming area (8). The support plate (4.3) is driven to move toward the collection position and abuts against the inner side of the suture nail (5) during the collection stroke. S3, during the actuation stroke or at the end of the actuation stroke, the locking block (6) abuts against the actuating portion (2.2) and swings to the unlocking position, and the displacement block (6.3) overcomes the retaining block (3.1), so that the retaining block (3.1) is warped and abuts against the displacement block (6.3), so that the locking block (6) is maintained in the unlocking position, at which time the extrusion plate (7) abuts the suture nail (5) against the forming plate (4.2), and the portion (5.21) to be bent of the suture nail (5) is extruded and deformed on both sides of the extrusion plate (7) and the forming plate (4.2), thereby forming a bent edge (5.1), and the support plate (4.3) slides to the retracted position and abuts against the back of the suture nail (5); S4. During the return stroke, the operating handle (3) drives the locking block (6) to return, and the locking block (6) abuts against the actuating portion (2.2) during the return stroke, and forces the locking block (6) to deflect and slide to abut against the retaining block (3.1), and is retained in the locked position again; At the same time, the operating handle (3) abuts against the staple pusher assembly (4) again, and forces the support plate (4.3) to extend again, while the staple pusher plate (4.6) moves toward the forming area (8) under the action of the spring (4.4), and finally outputs the formed suture staple (5).

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