Suturing device

Abstract

Disclosed is a suturing device, comprising an operating mechanism and a suturing mechanism. The operating mechanism is connected to the suturing mechanism and is configured to drive the movement of the suturing mechanism. The operating mechanism comprises a drive member (10), and the suturing mechanism comprises a flap (20). The flap (20) comprises a first gear (21) and a locking structure (22). The drive member (10) comprises a first toothed portion (11). The first gear (21) is in meshing connection with the first toothed portion (11). In response to the operating mechanism performing a first movement, the drive member (10) drives the flap (20) to move from a closed position to an open position, and subsequently, the locking structure (22) comes into contact with the drive member (10) to lock the flap (20) and maintain the flap in the open position. The contact between the locking structure (22) and the drive member (10) is a surface-to-surface contact, thereby solving the problem of the flap easily jamming during the retraction of the suturing device.

Description

stapler

[0001] This application claims priority to Chinese Patent Application No. 202311452164.3 filed on November 2, 2023, and the contents of the above-mentioned Chinese patent application disclosure are hereby cited in their entirety as a part of this application. Technical Field

[0002] Embodiments of the present disclosure relate to a stapler. Background Art

[0003] In minimally invasive surgery, staplers, as a commonly used medical device in surgical operations, are a device that can replace manual suturing.

[0004] Summary of the Invention

[0005] The embodiments of the present disclosure aim to provide a stapler that solves the problem that the fins are easily stuck when the stapler is recovered.

[0006] The present disclosure is achieved through the following technical solutions:

[0007] A suturing device includes an operating mechanism and a suturing mechanism, the operating mechanism is used to drive the suturing mechanism to move; the operating mechanism includes a driving member, the suturing mechanism includes a wing, the wing includes a first gear and a locking structure, the driving member includes a first tooth portion, the first gear is meshed with the first tooth portion, in response to the operating mechanism performing a first movement, after the driving member drives the wing to move from a closed position to an open position, the locking structure contacts the driving member to lock the wing to keep it in the open position, and the contact between the locking structure and the driving member is surface-to-surface contact.

[0008] Furthermore, the wing includes a first side and a second side, the first gear is located on the first side, and there is at least one locking structure, and at least one locking structure is arranged on the first gear and / or the second side.

[0009] Furthermore, the locking structure is the first tooth of the first gear, the first tooth includes a tooth top surface and a proximal side tooth surface, there is a transition surface between the tooth top surface and the proximal side tooth surface, the tooth top surface, the transition surface and / or the proximal side tooth surface are in contact with the contact surface of the driving member to lock the wing, and the contact is surface-to-surface contact.

[0010] Furthermore, the tooth top surface, the proximal tooth surface and the transition surface are smoothly connected.

[0011] Furthermore, the tooth top surface, transition surface and proximal tooth surface are arc-shaped surfaces as a whole.

[0012] Furthermore, the contact surface between the locking structure and the driving member is an arcuate surface, or the contact surface between the driving member and the locking structure is a plane.

[0013] Furthermore, the locking structure includes a cam, which is arranged on one side of the first tooth of the first gear. The top surface of the cam is higher than the tooth top surface of the first tooth and contacts the driving member.

[0014] Furthermore, the top end surface of the cam is located between the first tooth and the adjacent second tooth.

[0015] Furthermore, the first tooth portion has an avoidance groove adapted to the cam; when the first gear meshes with the first tooth portion and rotates, the cam is accommodated in the avoidance groove.

[0016] Furthermore, the locking structure is provided on the first gear and is close to the distal teeth relative to the proximal teeth of the first gear.

[0017] Furthermore, the locking structure includes a roller, which is rotatably disposed on the first tooth of the first gear, and a rolling surface of the roller is higher than a tooth top of the first tooth.

[0018] Furthermore, the first tooth is a proximal tooth of the first gear.

[0019] Furthermore, the locking structure also includes a rotating shaft, the first tooth has a groove, at least a portion of the roller is accommodated in the groove, both ends of the first tooth have through holes, the rotating shaft passes through the roller and the two ends are respectively accommodated in the two through holes.

[0020] Furthermore, the suturing device also includes a suturing needle, which includes a second gear, which is coaxially arranged with the first gear. The driving member also includes a second tooth portion located proximal to the first tooth portion, and the second gear is meshed with the second tooth portion. In response to the operating mechanism performing the second movement, the driving member drives the suturing needle to move.

[0021] The beneficial effect of the stapler provided by the embodiment of the present disclosure is that: by arranging a locking structure on the wing, after the driving member drives the wing to move from the closed position to the open position, the locking structure contacts the driving member and locks the wing. Since the contact between the locking structure and the driving member is surface-to-surface contact, the stress on the contact surface of the driving member can be reduced, so that when the driving member is retracted, the friction force on the driving member at the locking contact is reduced, thereby preventing the wing from being locked and stuck, ensuring the normal recovery of the stapler, and avoiding the surgical hidden danger caused by the stapler being unable to be separated from the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is an exploded view of a suturing mechanism in a first embodiment of the present disclosure;

[0023] FIG2 is a schematic structural diagram of a flap opened and unlocked at an angle in the first embodiment of the present disclosure;

[0024] FIG3 is a schematic structural diagram of another angle at which the wing is opened and unlocked in the first embodiment of the present disclosure;

[0025] FIG4 is a schematic structural diagram of an angle at which the fins are opened and locked in the first embodiment of the present disclosure;

[0026] FIG5 is a schematic structural diagram of another angle at which the wings are opened and locked in the first embodiment of the present disclosure;

[0027] FIG6 is a schematic structural diagram of the wing in the first embodiment of the present disclosure;

[0028] FIG7 is a schematic structural diagram of a driving member in the first embodiment of the present disclosure;

[0029] FIG8 is a schematic structural diagram of a stapler in a specific embodiment of the present disclosure;

[0030] FIG9 is an exploded view of the suturing mechanism in the second embodiment of the present disclosure;

[0031] FIG10 is a schematic structural diagram of a second embodiment of the present disclosure in which the wing is opened and unlocked at an angle;

[0032] FIG11 is a schematic structural diagram of another angle at which the wing is opened and unlocked in the second embodiment of the present disclosure;

[0033] FIG12 is a schematic structural diagram of an angle at which the wings are opened and locked in the second embodiment of the present disclosure;

[0034] FIG13 is a schematic structural diagram of another angle at which the wings are opened and locked in the second embodiment of the present disclosure;

[0035] FIG14 is a schematic structural diagram of a wing in a second embodiment of the present disclosure;

[0036] FIG15 is an exploded view of the suturing mechanism in the third embodiment of the present disclosure;

[0037] FIG16 is a schematic structural diagram of the flaps in the third embodiment of the present disclosure, which are opened and unlocked at one angle;

[0038] FIG17 is a schematic structural diagram of another angle at which the fins are opened and unlocked in the third embodiment of the present disclosure;

[0039] FIG18 is a schematic structural diagram of an angle at which the wings are opened and locked in the third embodiment of the present disclosure;

[0040] FIG19 is a schematic structural diagram of another angle of the flaps opened and locked in the third embodiment of the present disclosure;

[0041] FIG20 is a schematic structural diagram of the wing in the third embodiment of the present disclosure;

[0042] FIG21 is a partial enlarged view of point A in FIG20;

[0043] FIG22 is a schematic diagram of the forces acting on the wing and the driving member in a specific embodiment of the present disclosure.

[0044] The above drawings include the following reference numerals:

[0045] 10. Driving member; 11. First tooth portion; 111. Avoidance groove; 12. Second tooth portion; 13. First driving part; 14. Second driving part; 20. Wing; 21. First gear; 211. First tooth; 2111. Tooth top surface; 2112. Transition surface; 2113. Proximal tooth surface; 212. Second tooth; 22. Locking structure; 221. Cam; 222. Roller; 223. Rotating shaft; 23. Matching part; 30. Rotating pin; 40. Suture needle; 41. Second gear; 50. Storage part; 60. Base; 70. Connecting part; 80. Push-pull button; 90. Core rod assembly. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0047] It should be understood that the terms "proximal end" and "distal end" used in this article refer to the relative positions of the stapler and the user. Specifically, the end closer to the user is the "proximal end" and the end away from the stapler is the "distal end".

[0048] In the present disclosure, unless otherwise clearly stipulated and limited, the terms such as "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movably connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements or an interactive relationship between two elements such as abutment. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. It should be noted that when there are qualifiers before "connected" and "connection", they have the meaning defined by the corresponding qualifiers, and only exclude situations that obviously need to be excluded, and do not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, and does not include integration, but movably connected, etc. are not excluded.

[0049] The main principle of the stapler is that the doctor first makes a small incision in the patient's abdomen, the stapler enters the human body through the small incision, and then drives the positioning wings to open through the rack. The positioning wings are supported at the opening of the human body to ensure the stability of the stapler. The doctor then operates the mechanism to drive the suture needle out of the needle. The suture needle is a hook-shaped structure. The suture needle passes through the human tissue from the inside to the outside and reaches the predetermined position of the core rod assembly to accurately suture the patient. After the wings are opened, a locking structure is required to keep the wings in the open position. However, when the rack is retracted, the friction generated at the force contact point between some locking structures and the rack is large, which can easily cause the wings and the rack to enter a stuck state, resulting in the stapler being unable to be separated from the human body, causing surgical hazards.

[0050] Example 1

[0051] Referring to Figures 1 to 7, the stapler includes an operating mechanism and a suturing mechanism, wherein the operating mechanism is used to drive the suturing mechanism to move. The operating mechanism includes a driving member 10, and the suturing mechanism includes a wing 20. The wing 20 includes a first gear 21 and a locking structure 22. The driving member 10 includes a first tooth portion 11, and the first gear 21 is meshed with the first tooth portion 11. In response to the operating mechanism performing a first movement, after the driving member 10 drives the wing 20 to move from the closed position to the open position, the locking structure 22 contacts the driving member 10 and locks the wing 20 to maintain it in the open position. The contact between the locking structure 22 and the driving member 10 is surface-to-surface contact.

[0052] By providing a locking structure 22 on the wing 20, after the driving member 10 drives the wing 20 to move from the closed position to the open position, the locking structure 22 contacts the driving member 10 and locks the wing 20. Since the contact between the locking structure 22 and the driving member 10 is surface-to-surface contact, the stress on the contact surface of the driving member 10 can be reduced, so that when the driving member 10 is recovered (that is, the driving wing 20 is driven to move from the open position to the closed position), the friction force on the driving member 10 at the locking contact is reduced, thereby preventing the wing 20 from being locked and stuck, ensuring the normal recovery of the stapler, and avoiding the surgical hidden danger caused by the stapler being unable to be separated from the human body.

[0053] In this embodiment, the contact surface between the locking structure 22 and the driver 10 can be an arcuate surface or a flat surface, without limitation. For example, the contact surface between the locking structure 22 and the driver 10 is an arcuate surface. This allows the contact between the wing 20 and the driver 10 to be a "arc-plane" contact, thereby more effectively reducing the stress on the contact surface of the driver 10 and further reducing the friction of the driver 10 at the locking contact point when the driver 10 is retracted, preventing the wing 20 from being locked and stuck, thereby ensuring normal retraction of the stapler.

[0054] In this embodiment, the first tooth portion 11 is located at the distal end of the driver 10, and the proximal side of the first tooth portion 11 forms a contact surface for contacting the locking structure 22. In response to the operating mechanism performing a first movement, i.e., the driver 10 moves distally, the first gear 21 of the wing 20 first contacts and engages with the first tooth portion 11. Driven by the first tooth portion 11, the wing 20 rotates and opens. After the wing 20 opens, the driver 10 continues to move distally, and the locking structure 22 contacts the contact surface of the driver 10 and locks the wing 20.

[0055] In this embodiment, please refer to Figure 6. The two sides of the central axis of the wing 20 are the first side and the second side, which are the rotation support parts of the wing 20. The rotating pin 30 of the suturing mechanism passes through the first side and the second side in sequence, thereby driving the wing 20 to rotate. The first gear 21 is located on the first side of the wing 20.

[0056] Furthermore, there is at least one locking structure 22. When there is one locking structure 22, the locking structure 22 is arranged on the second side of the first gear 21 or the wing 20. When there are two or more locking structures 22, at least two locking structures 22 are symmetrically arranged on the second side of the first gear 21 and the wing 20. In other words, a locking structure 22 is also correspondingly provided on the second side of the wing 20, and the projections of the two locking structures 22 along the rotation axis direction of the first gear 21 coincide. When the wing 20 is opened, the two locking structures 22 on both sides of the wing 20 contact the driving member 10 at the same time and lock the wing 20. In this way, the locking contact positions on both sides of the wing 20 are the same. Under actual load conditions, both sides are in a locked stress state, and the load force on the locking structures 22 on both sides of the wing 20 is evenly distributed, and the stress is better. Further, please refer to Figure 6. In order to ensure that the load force at the locking structure 22 on both sides of the wing 20 is evenly distributed, the second side of the wing 20 has a matching portion 23. The matching portion 23 and the first gear 21 are also arranged correspondingly along the central axis direction of the first gear 21, and the locking structure 22 is arranged on the matching portion 23.

[0057] Please refer to Figures 2 to 6. In this embodiment, the locking structure 22 includes a cam 221. The cam 221 is located at the first tooth 211 of the first gear 21. The cam 221 is arranged on one side of the first tooth 211. The cam 221 and the first tooth 211 can be adjacent to each other or can be arranged at intervals. The top surface of the cam 221 is higher than the tooth top surface of the first tooth 211 and contacts the driving member 10. In other words, the top of the cam 221 has an arc-shaped surface. Through the above arrangement, the first gear 21 has an engaging function, and the locking structure 22 has a locking function. The two respectively realize different functions, so that the locking angle accuracy of the wing 20 is improved and the locking reliability is increased.

[0058] Referring to Figure 6 , in this embodiment, the top surface of the cam 221 is located between the first tooth 211 and the adjacent second tooth 212. Specifically, the proximal portion of the cam 221 is formed by expanding a portion of the first tooth 211 outward, and the distal portion extends from the proximal portion toward the adjacent second tooth 212. The top surface of the cam 221 is located between the proximal and distal portions. This divides the first tooth 211 into two parts, one portion occupied by the cam 221 and the other portion still used to mesh with the first tooth portion 11. Furthermore, referring to Figure 7 , to prevent interference with the meshing of the first gear 21 and the first tooth portion 11, the first tooth portion 11 has an escape groove 111 adapted to fit the cam 221. When the first gear 21 meshes and rotates with the first tooth portion 11, the cam 221 is accommodated within the escape groove 111.

[0059] Please refer to Figure 22, where F1 is the load force applied to the wing 20, L1 is the force arm of the load force applied to the wing 20, F2 is the force applied to the wing 20 by the driver 10, L2 is the force arm of the force applied to the wing 20 by the driver 10, and Finput is the driving force of the driver 10. According to the moment balance, F1*L1=F2*L2. To prevent the wing 20 from being locked and stuck, the driving force of the driver 10 needs to be greater than the friction force at the locking contact point during locking, that is, Finput ≥ μF2, where μ is the coefficient of friction between the wing 20 and the driver 10. As can be seen from the above, the larger L2 is, the smaller the driving force Finput of the driver 10 is required, making it easier to operate the stapler. Therefore, the force arm L2 of the force applied to the wing 20 by the driver 10 should be increased as much as possible.

[0060] In this embodiment, the first tooth 211 is a proximal tooth, that is, a tooth located at the proximal end of the first gear 21. For example, the top end of the cam 221 is closer to the second tooth 212 relative to the tooth tip of the first tooth 211. In other words, the top end of the cam 221 with the arcuate surface does not protrude from the tooth tip of the first tooth 211 along the center line of the first tooth 211, but is closer to the second tooth 212 relative to the first tooth 211, that is, located between the first tooth 211 and the second tooth 212. This can increase the force arm L2 of the support force exerted by the driver 10 on the wing 20, reduce the friction at the locking contact during locking, and further reduce the required driving force of the driver 10.

[0061] Furthermore, to increase the force arm L2 of the support force exerted by the driver 10 on the wing 20, the first tooth 211 can be configured as a non-proximal tooth, that is, a tooth located away from the proximal tooth, such as the distal tooth of the first gear 21 or a tooth between two proximal and distal teeth. In other words, the locking structure is positioned closer to the distal tooth relative to the proximal tooth of the first gear 21. In this case, the top surface of the cam 221 is slightly higher than the tooth top surface of the first tooth 211 compared to when it is configured as a proximal tooth, and the depth of the avoidance groove 111 adapted to the cam 221 also needs to be deepened accordingly.

[0062] In this embodiment, there are two flaps 20, positioned opposite each other on either side of the driver 10. The first gear 21 of one flap 20 corresponds to the mating portion 23 of the other flap 20. There are also two first teeth 11, and the two flaps 20 mesh with the two first teeth 11 of the driver 10, respectively, allowing them to open simultaneously under the influence of the driver 10. This arrangement ensures more even force distribution between the two flaps 20, allowing for better contact and locking with the driver 10.

[0063] Please refer to Figures 1 to 6. The suturing mechanism also includes a suturing needle 40. The suturing needle 40 includes a second gear 41, a transmission rod and a suturing arm. The suturing arm is arc-shaped. The second gear 41 is arranged at one end of the transmission rod. The other end of the transmission rod is connected to the suturing arm at an angle. The end of the suturing arm away from the transmission rod is a suturing needle. The second gear 41 is coaxially arranged with the first gear 21. Specifically, the second gear 41 is located between the first gear 21 and the matching portion 23. The driving member 10 also includes a second tooth portion 12 located proximal to the first tooth portion 11, which is used to drive the suturing needle. The second gear 41 is meshed and connected with the second tooth portion 12. In response to the operating mechanism performing the second movement, the driving member 10 drives the suturing needle 40 to move, thereby driving the suturing arm to rotate along an arc-shaped trajectory. In this embodiment, there are also two suturing needles 40, and the two suturing needles 40 are arranged opposite to each other. Please refer to Figure 7. The driving member 10 includes a first driving part 13 and a second driving part 14. The first drive unit 13 and the second drive unit 14 are arranged at intervals, and the first drive unit 13 is used to drive the wing 20 to move, and the second drive unit 14 is used to drive the suture needle 40 to move. Specifically, there are two first drive units 13, and the second drive unit 14 is located in the middle position of the two first drive units 13. It can be understood that the cams 221 of the two wings 20 are respectively locked in contact with the contact planes of the two first drive units 13. The first tooth portion 11 is located on the first drive unit 13, and the second tooth portion 12 is located on the second drive unit 14, and the second tooth portion 12 is located at the proximal end of the first tooth portion 11, so that when the driving member 10 moves toward the distal end, the first tooth portion 11 first engages with the first gear 21, and then the second tooth portion 12 engages with the second gear 41, so that the driving member 10 first drives the wing 20 to open, and then drives the suture needle 40 to be ejected.

[0064] Referring to Figures 1 and 9, the suturing mechanism further includes a storage member 50 and a base 60. The storage member 50 is used to store sutures. The ends of the sutures extend from the storage member 50 and are respectively connected to the suture needles of the two suture needles 40. The operating mechanism further includes a core rod assembly 90. The ends of the base 60 are respectively connected to the core rod assembly 90 and the storage member 50. Specifically, there are two bases 60, which are snap-fitted together to form an installation space. The wing 20, the suture needle 40, and at least a portion of the driving member 10 are all accommodated in the installation space. Avoidance gaps are respectively provided on both sides of the base 60 to allow the wing 20 and the suture needle 40 to extend out of the base 60 through the avoidance gaps. The suturing mechanism also includes two rotating pins 30, one located on either side of the driving member 10. The base 60 has a first mounting hole, allowing the rotating pins 30 to be inserted into the base 60. The rotating pins 30 sequentially pass through the first gear 21, the second gear 41, and the mating portion 23, allowing the flap 20 and the suturing needle 40 to rotate coaxially. Furthermore, the suturing mechanism also includes a connecting member 70. The base 60 has a second mounting hole, and the receiving member 50 has a corresponding through hole. The connecting member 70 sequentially passes through one second mounting hole, the through hole, and another second mounting hole, connecting the receiving member 50 to the distal end of the base 60. In this embodiment, the connecting member 70 is a pin.

[0065] Referring to Figure 8 , the operating mechanism further includes a push-pull button 80. The driver 10 is movably disposed within the core rod assembly 90, with its proximal end drivingly connected to the push-pull button 80. The base 60 has a needle exit port, i.e., the aforementioned avoidance notch, and the distal end of the core rod assembly 90 has a needle retention port. When using the stapler for suturing, the push-pull button 80 is first pushed distally, thereby driving the driver 10 distally, first driving the flaps 20 from a closed position to an open position, thereby supporting the human tissue, and then driving the suturing needle 40 to perform the needle removal operation.

[0066] As can be seen from the above, the push-pull button 80 drives the wing 20 and the suture needle 40 to move through the driver 10. Specifically, when the push-pull button 80 is pushed to perform a first movement along the axial direction of the core rod assembly 90 to drive the driver 10 to move, the first driving part 13 cooperates with the first gear 21 of the wing 20 to drive the wing 20 from the closed position to the open position; when the wing 20 is in the open position, the push-pull button 80 is continued to be pushed to perform a second movement along the axial direction of the core rod assembly 90 to drive the driver 10 to move, the second driving part 14 cooperates with the second gear 41 of the suture needle 40 to drive the suture needle 40 to perform a needle-out movement, and the suture needle 40 drives the suture thread to be released through the thread head. Subsequently, the suture needle 40 can drive the suture thread to pass through the abdominal wall tissue of the human body to suture the puncture hole. For more detailed structure and installation of components such as the driver 10, the wing 20 and the suture needle 40, please refer to the conventional structure, which will not be repeated here.

[0067] In this embodiment, the suturing arm of the suture needle 40 is detachably connected to the suture needle. Specifically, the transmission rod is a cylinder extending along the length of the suture arm, and its outer diameter is smaller than the outer diameter of the suture arm. The thread end of the suture thread is connected to the suture needle. The suture needle 40 passes through the hole wall of the puncture hole and enters the core rod assembly 90 through the needle retention port. A needle receiver is provided in the core rod assembly 90, and the needle receiver is located in the needle retention port. After the suture needle enters the needle retention port, it is fixedly connected to the needle receiver. Specifically, the needle receiver includes a receiving portion, a clamping portion, and a receiving plate. The clamping portion is located on both sides of the receiving portion, and the receiving plate is located in the center of the receiving portion. The receiving portion and the clamping portion are integrally formed. The clamping portion has a bent shape, and the receiving plate is an elastic mesh sheet or an elastic hollow sheet with a hollow structure, which is used to clamp the suture needle. The receiving piece is located in the needle retention port. After the suture needle passes through the wall of the puncture hole, it enters the needle retention port and is retained by the receiving piece. The suture needle of the other suture needle 40 is synchronously retained by the receiving piece of the needle receiver in the same manner, thereby receiving the suture needle. The specific structure of the needle receiver and the method of receiving the needle can be referred to the conventional structure and will not be described in detail here.

[0068] When the push-pull button 80 is pulled, the suture needle 40 is driven to retract; when the suture needle 40 retracts, the suture needle head is disengaged from the suture arm so that the suture needle head remains in the core rod assembly 90, and the suture arm retreats through the needle outlet to the installation space of the base 60.

[0069] Furthermore, when the push-pull button 80 is further pulled, the wing 20 is driven to retract, that is, the wing 20 moves from the open position to the closed position. Since the top of the cam 221 is an arcuate surface, the wing 20 and the driving member 10 will not get stuck. The first gear 21 moves from the contact plane of the driving member 10 to the first tooth portion 11 and meshes with the first tooth portion 11. Under reverse driving, the wing 20 is retracted into the installation space of the base 60.

[0070] Example 2

[0071] The difference between the second embodiment and the first embodiment is that the specific structure of the locking structure 22 is different from that of the first embodiment.

[0072] 10 to 14 , the locking structure 22 includes a roller 222 rotatably mounted on the first tooth 211 of the first gear 21, and the rolling surface of the roller 222 is higher than the tooth tip of the first tooth 211. With the above arrangement, after the driver 10 drives the flap 20 from the closed position to the open position, the roller 222 replaces the first tooth 211 to contact the driver 10 and lock the flap 20. Because the contact surface between the roller 222 and the driver 10 is an arcuate surface, the contact between the flap 20 and the driver 10 is also a "arc-plane" contact, and the sliding friction at the locking contact is converted to rolling friction, reducing the friction coefficient. Therefore, when the driver 10 is retracted, the friction force on the driver 10 at the locking contact is reduced, further preventing the flap 20 from being locked and stuck, ensuring the normal recovery of the stapler and avoiding surgical hazards caused by the stapler being unable to be removed from the human body.

[0073] Please refer to Figure 14, the locking structure 22 also includes a rotating shaft 223, the first tooth 211 has a groove, at least a portion of the roller 222 is accommodated in the groove, the two ends of the first tooth 211 respectively have through holes, the rotating shaft 223 is passed through the roller 222 and the two ends are respectively accommodated in the two through holes, so that the roller 222 can roll relative to the rotating shaft 223.

[0074] In an alternative embodiment, the locking mechanism further includes a bracket and a rotating shaft 223. Two brackets are provided, one at each end of the first tooth 211. The brackets have through-holes, and the rotating shaft 223 extends through the roller 222, with its ends respectively received within the two through-holes. In other words, the roller 222 is located outside the first tooth 211 and is enabled to roll by the bracket and rotating shaft 223. Of course, the first tooth 211 may also have a groove, allowing a portion of the roller 222 to be accommodated within the groove, thereby saving space.

[0075] In this embodiment, the mating portion 23 of the flap 20 is optionally provided with a roller 222, arranged in the same manner as the first gear 21, with the two rollers 222 being coaxially arranged. When the flap 20 is opened, the two rollers 222 on either side of the flap 20 simultaneously contact the driver 10 and lock the flap 20. This ensures that the locking contact points on both sides of the flap 20 are in the same position. Under actual load conditions, both sides are in a locked and stressed state, and the load force on the rollers 222 on both sides of the flap 20 is evenly distributed, providing better stress resistance.

[0076] Example 3

[0077] The difference between the third embodiment and the first embodiment is that the specific structure of the locking structure 22 is different from that of the first embodiment.

[0078] Referring to Figures 15 to 21 , the locking structure 22 is a first tooth 211 of the first gear 21. A transition surface 2112 is provided between the top surface 2111 of the first tooth 211 and the proximal tooth surface 2113. The top surface 2111, the transition surface 2112, and / or the proximal tooth surface 2113 contact the contact surface of the driver 10 to lock the tab 20. This contact is surface-to-surface. In other words, the locking structure 22 in this embodiment is not an additional component, but is provided in addition to the first tooth 211. The tooth thickness of the first tooth 211 is increased compared to the tooth thickness of the other teeth of the first gear 21. Accordingly, the tooth groove of the first tooth portion 11 that mates with the first tooth 211 is also enlarged to accommodate the first tooth 211.

[0079] In this embodiment, the tooth top surface 2111, the transition surface 2112, and the proximal tooth surface 2113 are smoothly connected. This arrangement can improve the smoothness of the surface-to-surface contact between the wing 20 and the driver 10, thereby reducing the stress on the contact surface of the driver 10 and further reducing the friction force on the driver 10 at the locking contact when the driver 10 is retracted.

[0080] Furthermore, the tooth top surface 2111, the transition surface 2112, and the proximal tooth surface 2113 are all arcuate surfaces. This allows the contact between the wing 20 and the driver 10 to be a "arc-surface-flat" contact, thereby more effectively reducing the stress on the contact surface of the driver 10 and further reducing the friction of the driver 10 at the locking contact point when the driver 10 is retracted, preventing the wing 20 from being locked and ensuring the normal retraction of the stapler.

[0081] In this embodiment, the first tooth 211 is a proximal tooth of the first gear 21. This ensures that when the driver 10 drives the wing 20 to fully open, the locking structure 22 is located at the portion of the first gear 21 closest to the driver 10, thereby being in full contact with the driver 10 and ensuring a locking effect.

[0082] To sum up, by providing a locking structure 22 on the wing 20, after the driving member 10 drives the wing 20 to move from the closed position to the open position, the locking structure 22 contacts the driving member 10 and locks the wing 20. Since the contact between the locking structure 22 and the driving member 10 is surface-to-surface contact, the stress on the contact surface of the driving member 10 can be reduced, so that when the driving member 10 is recovered, the friction force on the driving member 10 at the locking contact is reduced, thereby further preventing the wing 20 from being locked and stuck, ensuring the normal recovery of the stapler, and avoiding the surgical hidden danger caused by the stapler being unable to be separated from the human body.

[0083] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the scope of protection of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A stapler, comprising: An operating mechanism and a suturing mechanism, wherein the operating mechanism is used to drive the suturing mechanism to move; the operating mechanism includes a driving member, the suturing mechanism includes a wing, the wing includes a first gear and a locking structure, the driving member includes a first tooth portion, the first gear is meshed and connected with the first tooth portion, in response to the operating mechanism performing a first movement, after the driving member drives the wing to move from a closed position to an open position, the locking structure contacts the driving member to lock the wing to keep it in the open position, and the contact between the locking structure and the driving member is surface-to-surface contact.

2. The stapler according to claim 1, wherein: The wing comprises a first side and a second side, the first gear is located on the first side, and there is at least one locking structure, which is arranged on the first gear and / or the second side.

3. The stapler according to claim 1 or 2, wherein: The locking structure is the first tooth of the first gear, the first tooth includes a tooth top surface and a proximal side tooth surface, a transition surface is provided between the tooth top surface and the proximal side tooth surface, the tooth top surface, the transition surface and / or the proximal side tooth surface are in contact with the contact surface of the driving member to lock the wing, and the contact is surface-to-surface contact.

4. The stapler according to claim 3, wherein: The tooth top surface, the proximal side tooth surface and the transition surface are smoothly connected.

5. The stapler according to claim 4, wherein: The tooth top surface, the transition surface and the proximal tooth surface are arc-shaped surfaces as a whole.

6. The stapler according to any one of claims 1 to 5, wherein: The contact surface between the locking structure and the driving member is an arc-shaped surface, or the contact surface between the driving member and the locking structure is a plane.

7. The stapler according to claim 1, wherein: The locking structure comprises a cam, which is arranged on one side of the first tooth of the first gear. The top end surface of the cam is higher than the tooth top surface of the first tooth and contacts the driving member.

8. The stapler according to claim 7, wherein: The top end surface of the cam is located between the first tooth and an adjacent second tooth.

9. The stapler according to claim 7 or 8, wherein: The first tooth portion has an avoidance groove matched with the cam; when the first gear meshes and rotates with the first tooth portion, the cam is accommodated in the avoidance groove.

10. The stapler according to any one of claims 7 to 9, wherein: The locking structure is disposed on the first gear and is close to the distal teeth relative to the proximal teeth of the first gear.

11. The stapler according to claim 1, wherein: The locking structure comprises a roller, which is rotatably disposed on the first tooth of the first gear, and a rolling surface of the roller is higher than a tooth top of the first tooth.

12. The stapler according to any one of claims 3-5, 7-11, wherein: The first tooth is a proximal tooth of the first gear.

13. The stapler according to claim 11, wherein: The locking structure also includes a rotating shaft, the first tooth has a groove, at least a portion of the roller is accommodated in the groove, both ends of the first tooth have through holes respectively, the rotating shaft passes through the roller and both ends are respectively accommodated in the two through holes.

14. The stapler according to any one of claims 1 to 13, further comprising a suturing needle, wherein: The suturing needle includes a second gear, which is coaxially arranged with the first gear. The driving member also includes a second tooth portion located proximal to the first tooth portion. The second gear is meshingly connected with the second tooth portion. In response to the operating mechanism performing a second movement, the driving member drives the suturing needle to move.

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