Surgical suturing instrument

Abstract

The invention relates to a surgical suturing instrument, a handle of the surgical suturing instrument comprises a handle shell, a support, a transmission rack and a percussion assembly, and the support is fixedly arranged in the handle shell; the transmission rack is slidably connected with the support along the longitudinal axis. First transmission teeth are arranged on one side face of the transmission rack in the longitudinal axis direction. The percussion assembly comprises a motor and a transmission gear; the transmission gear and the motor have a connection state and a disconnection state, and when the transmission gear is in the connection state, the transmission gear is in transmission connection with the motor; in the disengagement state, the transmission gear is disengaged from the motor; and the transmission gear is in meshing transmission with the first transmission teeth in both the connection state and the disconnection state. When the surgical suturing instrument breaks down, the transmission gear and the motor can be switched from a connection state to a disconnection state, at the moment, transmission of the transmission gear and the motor is disengaged, that is, when the transmission gear is not limited by the self-locking performance of the motor and drives the transmission rack to retreat, the jaw can be opened to release tissue.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to surgical suturing devices. Background Art

[0002] Currently, staplers can be divided into pure manual staplers and electric staplers. Manual staplers use manual control to activate the stapler assembly to suture tissue. During use, the trigger handle needs to be manually gripped multiple times, and the stapler assembly is pushed to close and form through the mechanical transmission mechanism of the stapler. Improper operation can easily cause pulling and tearing of the sutured tissue. Electric staplers, on the other hand, are a combination of a DC motor, a circuit board, and traditional mechanical components. Under electric control, all the action functions of a laparoscopic stapler are fully realized. The operation is simple, the activation saves time and effort, and the edges of the sutured tissue are continuous and smooth, which is more conducive to wound recovery and can reduce the probability of medical accidents.

[0003] In an electric stapler, the motor drives the rack through the active gear, which drives the stapler assembly to move and suture tissue. As the primary drive mechanism, the motor is subject to inevitable malfunctions. For example, during use, if the motor fails, the jaws of the stapler may be clamped on tissue, requiring the jaws to open and release the tissue. Alternatively, a non-motor mechanical failure may cause the transmission to become stuck, rendering the motor inoperable. In these cases, the self-locking nature of the motor makes it difficult to retract the rack when it is connected to the motor transmission, preventing the jaws from opening to release tissue and potentially harming the patient. Alternatively, if the jaws are open at the time of the malfunction, the self-locking nature of the motor may prevent the jaws from closing, making it difficult to remove the stapler from the body. Summary of the Invention

[0004] Based on this, it is necessary to provide a surgical suturing instrument to address the problem that the rack cannot move back or forward due to motor failure or other non-motor mechanical failures during use of the electric stapler.

[0005] A surgical suturing instrument, comprising:

[0006] handle;

[0007] a shaft assembly extending from the handle and defining a longitudinal axis;

[0008] an end effector connected to an end of the shaft assembly away from the handle, the end effector comprising a cartridge seat and an anvil, the cartridge seat being rotatably connected to the anvil and movable between an open position and a closed position;

[0009] The handle comprises:

[0010] handle housing;

[0011] a bracket, the bracket being fixedly disposed in the handle housing;

[0012] a transmission rack, slidably connected to the bracket along the longitudinal axis, and a first transmission tooth is provided on a side surface of the transmission rack along the longitudinal axis;

[0013] The firing assembly includes a motor and a transmission gear; the transmission gear and the motor have a connected state and a disengaged state. When in the connected state, the transmission gear is in transmission connection with the motor; when in the disengaged state, the transmission gear and the motor are disengaged from each other.

[0014] Wherein, the transmission gear is meshed with the first transmission tooth for transmission in both the connected state and the disengaged state.

[0015] In one embodiment, the transmission gear has an axial hole along the rotation center, and at least a portion of the axial hole is provided with a first locking structure, which is used to cooperate with a rotating shaft passing through the axial hole so that the transmission gear and the rotating shaft rotate synchronously.

[0016] In one embodiment, the motor includes the rotating shaft, the rotating shaft is provided with a second locking structure, and the transmission gear is sleeved on the rotating shaft, wherein, when in the connected state, the first locking structure and the second locking structure cooperate and engage with each other, so that the transmission gear is connected to the rotating shaft in transmission; when in the disengaged state, the transmission gear moves along the rotating shaft, so that the first locking structure and the second locking structure are disengaged from each other, thereby disengaging the transmission gear from the rotating shaft.

[0017] In one embodiment, the firing assembly further includes a driving gear, a driven gear, and a rotating shaft; the driving gear is fixedly connected to the output shaft of the motor, the rotating shaft includes a second latching structure, the driven gear has a third latching structure, and the transmission gear and the driven gear are both sleeved on the rotating shaft;

[0018] Wherein, when in the connected state, the driving gear is meshed with the driven gear, the first latching structure and the second latching structure are engaged with each other, and the third latching structure and the second latching structure are engaged with each other, so that the transmission gear and the driven gear are both in transmission connection with the rotating shaft;

[0019] When in the disengaged state, the first locking structure and the second locking structure are disengaged from each other along the axial direction of the rotating shaft, so that the transmission gear is disengaged from the rotating shaft, and / or the third locking structure and the second locking structure are disengaged from each other along the axial direction of the rotating shaft, so that the driven gear is disengaged from the rotating shaft.

[0020] In one embodiment, the firing assembly further includes a driving gear and a guide shaft;

[0021] The transmission gear is rotatably sleeved on the guide shaft, and the transmission gear includes a first gear and a second gear coaxially fixedly connected, and the second gear is meshed with the first transmission gear for transmission;

[0022] In the connected state, the first gear is meshed with the driving gear for transmission;

[0023] In the disengaged state, the transmission gear moves along the guide shaft, so that the first gear is disengaged from the meshing transmission with the driving gear.

[0024] In one embodiment, the distance between the first gear and the second gear is greater than or equal to the thickness of the driving gear. When the transmission gear moves along the rotating shaft so that the first gear is disengaged from the driving gear, the driving gear is located between the first gear and the second gear.

[0025] In one embodiment, the handle further includes a retractable unlocking member having a locking position and an unlocking position. When the retractable unlocking member moves from the locking position to the unlocking position, the connection state is switched to the disconnection state.

[0026] In one embodiment, the firing assembly further includes an elastic member, which is sleeved on the rotating shaft and is used to maintain the transmission gear or the rotating shaft in a state corresponding to the connection state.

[0027] In one embodiment, a first non-circular groove is provided at the center of one end of the transmission gear, and the first non-circular groove is used to cooperate with a rotating trigger to drive the transmission gear to rotate.

[0028] In one embodiment, the rack further includes a second transmission tooth arranged along the longitudinal axis, and the handle further includes a pawl, and the pawl is used to abut against the second transmission tooth to control the retraction direction of the transmission rack.

[0029] The above-mentioned surgical suturing instrument, when the surgical suturing instrument is in normal use, is in a connected state between the transmission gear and the motor. At this time, the transmission gear is connected to the motor, and at the same time, the transmission gear is meshed with the first transmission tooth for transmission, that is, the motor can drive the transmission rack to move through the transmission gear, so as to realize the opening and closing of the jaws and the knife-pushing anastomosis function. When the surgical suturing instrument fails, the transmission gear and the motor can be switched from the connected state to the disengaged state. At this time, the transmission gear and the motor are disengaged from the transmission, that is, the motor cannot drive the transmission gear and rotate, that is, in the event of a failure, it is not limited by the self-locking property of the motor, and the jaws can be opened or closed by driving the transmission rack back or forward, so as to solve the problem that the jaws need to be opened when clamping tissue, and the jaws need to be closed when the jaws fail to open when the jaws are in the body and the jaws are open. In addition, since the transmission gear is engaged with the first transmission tooth in both the connected state and the disengaged state, when the transmission gear is disconnected from the motor, the transmission rack can be driven back or forward by driving the transmission gear, thereby opening or closing the jaws; this design simplifies the structure and improves the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the handle and the rotary wrench in one embodiment.

[0031] Figure 2 Schematic diagram of the connection structure of the firing mechanism, the retractable unlocking member and the rotary wrench in one embodiment.

[0032] Figure 3 for Figure 2 Schematic diagram of the transmission gear and motor in the connected state.

[0033] Figure 4 for Figure 2 Schematic diagram of the middle transmission gear and motor in the disengaged state.

[0034] Figure 5 for Figure 2 Schematic diagram of the structure of the firing mechanism when using the rotating wrench to retract.

[0035] Figure 6 for Figure 2 Schematic diagram of the transmission gear structure.

[0036] Figure 7 for Figure 2 Schematic diagram of the structure of the rotary wrench.

[0037] Figure 8 Schematic diagram of the connection structure of the firing mechanism, the retractable unlocking member and the rotary wrench in one embodiment.

[0038] Figure 9 for Figure 8Schematic diagram of the structure when the transmission gear and motor are in the connected state.

[0039] Figure 10 for Figure 8 Schematic diagram of the structure when the transmission gear and motor are disengaged.

[0040] Figure 11 for Figure 8 Schematic diagram of the structure in which the rotating shaft and the rotating nut abut each other.

[0041] Figure 12 for Figure 8 Schematic diagram of the structure of the front and back sides of the middle transmission gear.

[0042] Figure 13 Schematic diagram of the structure of the bracket.

[0043] Figure 14 Schematic diagram of the connection structure between the firing mechanism and the retractable unlocking member in one embodiment.

[0044] Figure 15 for Figure 14 Schematic diagram of the transmission gear and motor in the connected state.

[0045] Figure 16 for Figure 14 Schematic diagram of the middle transmission gear and motor in the disengaged state.

[0046] Figure 17 for Figure 14 Schematic diagram of the structure of the rotating nut.

[0047] Figure 18 for Figure 14 Schematic diagram of the structure of the transmission gear.

[0048] Figure 19 Schematic diagram of the connection structure of the firing mechanism, the retractable unlocking member and the rotary wrench in one embodiment.

[0049] Figure 20 for Figure 19 Schematic diagram of the transmission gear and motor in the connected state.

[0050] Figure 21 for Figure 19 Schematic diagram of the middle transmission gear and motor in the disengaged state.

[0051] Figure 22 Schematic diagram of the pawl disengaging from the second transmission tooth in one embodiment.

[0052] Figure 23 Schematic diagram of the pawl disengaging from the abutment of the second transmission tooth in one embodiment.

[0053] Reference numerals: 10, handle housing; 100, motor; 110, rotating shaft; 111, second latching structure; 210, transmission gear; 211, first latching structure; 212, first non-circular groove; 214, idle groove; 215, second retracting tooth; 216, circular hole; 220, driven gear; 221, third latching structure; 230, rotating shaft; 231, second latching structure; 232, cylindrical structure; 300, transmission gear; 310, first gear; 320, second gear; 330, guide shaft; 340. First non-circular groove; 400. Driving gear; 510. Rotating nut; 511. Second non-circular groove; 512. First retracting tooth; 513. Elastic member; 514. Abutment portion; 520. Cam assembly; 521. Connecting section; 522. Cam section; 600. Rack; 610. First transmission tooth; 620. Second transmission tooth; 700. Rotating trigger; 710. First rotating shaft; 720. Second rotating shaft; 800. Bracket; 810. Threaded hole; 820. Unthreaded hole; 900. Pawl. DETAILED DESCRIPTION

[0054] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0055] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0056] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0057] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0058] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0059] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0060] See Figures 1-21One embodiment of the present application discloses a surgical stapling instrument comprising a handle, a shaft assembly, and an end effector. The shaft assembly extends from the handle and defines a longitudinal axis. The end effector is connected to an end of the shaft assembly distal from the handle. The end effector comprises a staple cartridge seat and an anvil. The staple cartridge seat and the anvil are rotatably connected and movable between an open position and a closed position. The handle includes a handle housing 10, a bracket 800, a transmission rack 600 and a firing assembly; the bracket 800 is fixedly arranged in the handle housing 10; the transmission rack 600 is slidingly connected to the bracket 800 along the longitudinal axis, and a first transmission tooth 610 is provided on one side of the transmission rack 600 along the longitudinal axis direction; the firing assembly includes a motor 100, transmission gears 210, 300; the transmission gears 210, 300 and the motor 100 have a connected state and a disengaged state. When in the connected state, the transmission gears 210, 300 are connected to the motor 100 for transmission; when in the disengaged state, the transmission gears 210, 300 are disengaged from the motor 100 for transmission; wherein, the transmission gears 210, 300 are engaged with the first transmission tooth 610 for transmission in both the connected state and the disengaged state.

[0061] The handle is connected to the end effector through an axis assembly. An excitation assembly is provided in the handle, and the excitation assembly is connected to the end effector through a transmission rack 600. When the rack 600 moves, the nail magazine seat and the nail anvil can move between the open position and the closed position, that is, the jaws are opened or closed.

[0062] In this embodiment, when the surgical suturing instrument is used normally, the transmission gears 210, 300 are in a connected state with the motor 100. At this time, the transmission gears 210, 300 are in transmission connection with the motor 100. At the same time, the transmission gears 210, 300 are engaged with the first transmission teeth 610 for transmission, that is, the motor 100 can drive the transmission rack 600 to move through the transmission gears 210, 300 to realize the opening and closing of the jaws. When the surgical suturing instrument fails, the transmission gears 210, 300 and the motor 100 can be switched from a connected state to a disengaged state. At this time, the transmission gears 210, 300 are disengaged from the motor 100, that is, the motor cannot drive the transmission gears 210, 300 to rotate, that is, in the event of a failure, it is not restricted by the self-locking property of the motor 100, and the jaws can be opened or closed by driving the transmission rack 600 back or forward, so as to solve the problem that the jaws need to be opened when clamping tissue, and the jaws need to be closed when the jaws fail to open when clamping tissue, and the jaws need to be closed when the jaws fail to open when the jaws are open inside the body.

[0063] In addition, since the transmission gears 210 and 300 are engaged and transmitted with the first transmission tooth 610 in both the connected state and the disengaged state, when the transmission gears 210 and 300 are disconnected from the motor 100, the transmission rack 600 can be driven back or forward by driving the transmission gears 210 and 300, thereby opening or closing the jaws; this design simplifies the structure and improves the convenience of operation.

[0064] Combine Figure 2-Figure 12 In some embodiments, the transmission gear 210 has an axial hole along the rotation center, and at least a portion of the axial hole is provided with a first locking structure 211. The first locking structure 211 is used to cooperate with the rotating shaft 110, 230 passing through the axial hole to enable the transmission gear 210 to rotate synchronously with the rotating shaft 110, 230.

[0065] In this embodiment, when the first latching structure 211 is engaged with the rotating shafts 110 and 230, the motor 100 can drive the transmission gear 210 to rotate through the rotating shafts 110 and 230 to ensure normal use of the surgical suturing instrument. When the first latching structure 211 is disconnected from the rotating shafts 110 and 230, the rotating shafts 110 and 230 cannot transmit the rotation of the motor 100 to the transmission gear 210, that is, the motor cannot drive the transmission gear 210 to rotate, and is not limited by the self-locking property of the motor 100, so that the rack 600 can be driven to retract.

[0066] Combine Figure 2-Figure 7 In some embodiments, the motor 100 includes a rotating shaft 110, which is provided with a second locking structure 111, and the transmission gear 210 is sleeved on the rotating shaft 110, wherein, when in a connected state, the first locking structure 211 and the second locking structure 111 cooperate and engage with each other, so that the transmission gear 210 is connected to the rotating shaft 110 in transmission; when in a disengaged state, the transmission gear 210 moves along the rotating shaft 110, so that the first locking structure 211 and the second locking structure 111 are disengaged from each other, thereby disengaging the transmission gear 210 from the rotating shaft 110.

[0067] In this embodiment, the transmission gear 210 can move axially along the output shaft of the motor 100. When the transmission gear 210 moves to the point where the first locking structure 211 is engaged with the second locking structure 111, the transmission gear 210 and the motor 100 are in a connected state. When the transmission gear 210 moves to the point where the first locking structure 211 is disengaged from the second locking structure 111, the transmission gear 210 and the motor 100 are in a disengaged state.

[0068] Of course, the output shaft of the motor 100 may also move relative to the transmission gear 210 so that the first locking structure 211 is engaged with or disengaged from the second locking structure 111 .

[0069] Among them, one of the first locking structure 211 and the second locking structure 111 is a key slot, and the other is a key. When the key is located in the key slot, the first locking structure 211 cooperates with the second locking structure 111. When the key is out of the key slot, the first locking structure 211 and the second locking structure 111 disengage from each other.

[0070] Combine Figure 6 Specifically, the first latching structure 211 is a keyway defined within the transmission gear 210. The transmission gear 210 also has an idle groove 214 defined therein. The idle groove 214 is located on one side of the keyway along the axial direction of the transmission gear 210. When the key on the output shaft of the motor 100 is located within the keyway, the motor 100 can drive the transmission gear 210 to rotate. When the transmission gear 210 moves axially until the key on the output shaft of the motor 100 is located within the idle groove 214, the motor 100 idles, meaning it cannot drive the transmission gear 210 to rotate.

[0071] Combine Figures 8-12 In some other embodiments, the firing assembly further includes a driving gear 400, a driven gear 220, and a rotating shaft 230; the driving gear 400 is fixedly connected to the output shaft of the motor 100, the rotating shaft 230 includes a second latching structure 231, the driven gear 220 has a third latching structure 221, and the transmission gear 210 and the driven gear 220 are both sleeved on the rotating shaft 230; wherein, when in the connected state, combined with Figure 9 , the driving gear 400 is meshed with the driven gear 220, the first latching structure 211 and the second latching structure 231 are engaged with each other, and the third latching structure 221 and the second latching structure 231 are engaged with each other, so that the transmission gear 210 and the driven gear 220 are both connected to the rotating shaft 230; when in the disengaged state, the combination Figure 10 The first locking structure 211 and the second locking structure 231 are disengaged from each other along the axial direction of the rotating shaft 230, so that the transmission gear 210 and the rotating shaft 230 are disengaged from each other, and / or the third locking structure 221 and the second locking structure 231 are disengaged from each other along the axial direction of the rotating shaft 230, so that the driven gear 220 and the rotating shaft 230 are disengaged from each other.

[0072] In this embodiment, both the driven gear 220 and the transmission gear 210 are sleeved on the rotating shaft 230 and are able to slide axially on the rotating shaft 230. The second latching structure 231 is a non-circular column provided on the rotating shaft 230, such as a rectangular column or a triangular column, or the second latching structure 231 is a guide key provided on the rotating shaft 230. Correspondingly, the first latching structure 211 and the third latching structure 221 are both grooves that cooperate with the second latching structure 231.

[0073] When the driven gear 220 is engaged with the second engaging structure 231 on the rotating shaft 230 via the third engaging structure 221, and the transmission gear 210 is engaged with the second engaging structure 231 on the rotating shaft 230 via the first engaging structure 211, the rotating shaft 230, the transmission gear 210, and the driven gear 220 rotate synchronously. At the same time, since the driving gear 400 is engaged with the driven gear 220, the motor 100 can drive the rack 600 to move sequentially through the driving gear 400, the driven gear 220, the rotating shaft 230, and the transmission gear 210. When the first engaging structure 211 on the transmission gear 210 is disengaged from the second engaging structure 231 on the rotating shaft 230, and / or the third engaging structure 221 on the driven gear 220 is disengaged from the second engaging structure 231 on the rotating shaft 230, the motor 100 cannot drive the transmission gear 210 to rotate, i.e., the transmission gear 210 is out of the self-locking state of the motor 100.

[0074] Further, combined Figure 11 The rotating shaft 230 includes a cylindrical structure 232 and a square cylindrical structure provided at one end of the cylindrical structure. The square cylindrical structure is a second locking structure 231. The driven gear 220 is fixedly connected to the square cylindrical structure. The rotating shaft 230 can move axially relative to the transmission gear 210 so that the transmission gear 210 switches between cooperating with the cylindrical structure or cooperating with the square cylindrical structure. Correspondingly, combined with Figure 12 A circular hole 216 and a square hole that are interconnected are provided in the transmission gear 210. The square hole serves as a first locking structure 211. When the transmission gear 210 moves to the square cylindrical structure, the square hole cooperates with the square cylindrical structure, and the transmission gear 210 and the motor 100 are in a connected state; when the transmission gear 210 moves to the cylindrical structure, the circular hole cooperates with the cylindrical structure, and the transmission gear 210 and the motor 100 are in a disengaged state.

[0075] Of course, the transmission gear 210 may also slide axially relative to the rotating shaft 230 so that the transmission gear 210 switches between cooperating with the cylindrical structure or cooperating with the square column structure.

[0076] Combine Figures 14-21 In some embodiments, the firing assembly further includes a driving gear 400 and a guide shaft 330; the transmission gear 210 is rotatably sleeved on the guide shaft 330, and the transmission gear 210 includes a first gear 310 and a second gear 320 coaxially fixedly connected, and the second gear 320 is meshed with the first transmission tooth 610 for transmission; in the connected state, the first gear 310 is meshed with the driving gear 400 for transmission; in the disengaged state, the transmission gear 210 moves along the guide shaft 330, so that the first gear 310 is disengaged from the meshing transmission with the driving gear 400.

[0077] In this embodiment, when in the connected state, the first gear 310 meshes with the driving gear 400 for transmission. Simultaneously, since the first gear 310 and the second gear 320 are fixedly connected, and the second gear 320 meshes with the first transmission teeth 610 for transmission, the driving gear 400 can sequentially drive the transmission rack 600 via the first gear 310, the second gear 320, and the first transmission teeth 610. When it is necessary to disengage the motor 100 from the transmission gear 300, the transmission gear 300 is moved along the guide shaft 330 so that the first gear 310 disengages from the meshing transmission with the driving gear 400, thereby disconnecting the transmission gear 300 from the motor 100.

[0078] Furthermore, the distance between the first gear 310 and the second gear 320 is greater than or equal to the thickness of the driving gear 400. When the transmission gear 300 moves along the guide shaft 330, causing the first gear 310 to disengage from the driving gear 400, the driving gear 400 is located between the first gear 310 and the second gear 320. In a specific embodiment, it is preferred that the distance between the first gear 310 and the second gear 320 is greater than the thickness of the driving gear 400 to ensure accuracy and stability when switching to the disengaged state, thereby reducing control precision and difficulty.

[0079] In this embodiment, when it is necessary to switch the transmission gear 300 and the motor 100 from a connected state to a disconnected state, the second gear 320 can be directly pushed so that the driving gear 400 is located between the first gear 310 and the second gear 320, that is, the first gear 310 and the driving gear 400 are disengaged from the transmission.

[0080] In some embodiments, the handle further includes a retractable unlocking member having a locked position and an unlocked position. When the retractable unlocking member moves from the locked position to the unlocked position, the connected state is switched to the disconnected state. The retractable unlocking member abuts against one end of the transmission gear 300 or the rotating shaft 230. The specific structure of the retractable unlocking member includes, but is not limited to, the following embodiments.

[0081] In some embodiments, combined Figure 14-17 The retractable unlocking member is a rotating nut 510, which is located at one end of the rotating shaft portion of the transmission gears 210, 300. The rotating nut 510 is threadedly connected to the bracket 800. A second non-circular groove 511 is defined at the end of the rotating nut 510 away from the transmission gears 210, 300. The second non-circular groove 511 is configured to cooperate with the first rotating shaft 710 of the rotary trigger 700 to drive the rotating nut 510 to rotate. When the rotating nut 510 is in the locked position, the transmission gears 210, 300 are connected to the motor 100. When the rotating nut 510 rotates relative to the bracket to move axially until the transmission gears 210, 300 are disengaged from the motor 100, the rotating nut 510 is in the unlocked position.

[0082] In actual use, when the motor 100 of the surgical suturing instrument fails or other mechanical failures cause the transmission to be stuck, resulting in the motor 100 being unable to drive, the first rotating shaft 710 of the rotating trigger 700 can be first inserted into the second non-circular groove 511 of the rotating nut 510, and then the rotating trigger 700 is used to drive the rotating nut 510 to rotate relative to the bracket 800, thereby causing the rotating nut 510 to move axially to squeeze the transmission gears 210 and 300, thereby causing the transmission gears 210 and 300 to be disconnected from the motor 100.

[0083] In other embodiments, similarly, the retraction unlocking member is a rotating nut 510, and one end of the rotating shaft of the transmission gear 210, 300 is provided with a rotating nut 510, and the rotating nut 510 is threadedly connected to the bracket 800. The end of the rotating nut 510 away from the transmission gear 210, 300 is provided with a second non-circular groove 511, and the second non-circular groove 511 is used to cooperate with the rotating trigger 700 to drive the rotating nut 510 to rotate. Different from the previous embodiment, Figures 8-11 An abutment portion 514 is provided at one end of the rotating nut 510 close to the transmission gears 210 and 300 . The abutment portion 514 is used to extend into the transmission gear 210 to abut against one end of the rotating shaft 230 .

[0084] In actual use, when the motor 100 of the surgical suturing instrument fails or other mechanical failures cause the transmission to be stuck, resulting in the motor 100 being unable to drive, the rotating trigger 700 can be first inserted into the second non-circular groove 511 of the rotating nut 510, and the rotating trigger 700 can be used to drive the rotating nut 510 to rotate relative to the bracket 800, thereby causing the rotating nut 510 to move axially to squeeze the rotating shaft 230, so that the second locking structure 231 on the rotating shaft 230 disengages from the first locking structure 211 of the transmission gear 210.

[0085] In some other embodiments, there is no need to set a retractable unlocking member. A first non-circular groove 340 is provided at the center position of one end of the transmission gear 300. The first non-circular groove 340 is used to cooperate with the rotating trigger 700. The transmission gear 300 can be directly squeezed and moved axially by rotating the trigger 700.

[0086] In actual use, when the motor 100 of the surgical suturing instrument fails or other mechanical failures cause the transmission to be stuck, resulting in the motor 100 being unable to drive, the rotary trigger 700 is inserted into the first non-circular groove 340 of the transmission gear 300, and the transmission gear 300 is pushed axially, thereby disconnecting the transmission gear 300 from the motor 100.

[0087] Furthermore, in the above embodiments, an operating port is provided on the handle housing 10 corresponding to the first non-circular groove 340 or the second non-circular groove 511, wherein the operating port is used for the wrench 700 to pass through, and the second non-circular groove 511 is used to cooperate with the wrench 700 to drive the rotating nut 510 to rotate, and a first operating port can be provided accordingly, and the first non-circular groove 340 is used to cooperate with the wrench 700 to drive the transmission gear 300 to rotate, and a second operating port can be provided accordingly. In some embodiments, the operating port is provided with a cover plate rotatably connected to the handle housing 10; in the event of a fault, the cover plate can be opened to simultaneously expose the first non-circular groove 340 and the second non-circular groove 511, and then the rotating trigger 700 can be inserted into the first non-circular groove 340 or the second non-circular groove 511 to perform the corresponding operation.

[0088] In some other embodiments, combined Figure 2-Figure 4 The retractable unlocking member is a cam assembly 520, which is disposed on the end of the bracket 800 near the operating port. The cam assembly 520 includes a connecting segment 521 and a cam segment 522, which are connected to each other. The cam segment 522 abuts the transmission gear 210. The connecting segment 521 has a socket, which is used to cooperate with the rotating trigger 700 to drive the cam assembly 520 to rotate, thereby driving the transmission gear 210 to move axially. The cam assembly 520 can be rotated from a locked position to an unlocked position. When the cam assembly 520 is in the locked position, the transmission assembly is connected to the motor 100, and the surgical stapling instrument can now operate normally.

[0089] The plug-in hole may be a circular or non-circular structure, as long as the rotary trigger 700 is inserted into the plug-in hole, the cam assembly 520 can be driven to rotate.

[0090] In actual use, when the motor 100 of the surgical suturing instrument fails or other mechanical failures cause the transmission to be stuck, making the motor 100 unable to drive, the rotary trigger 700 can be first inserted into the plug hole of the connecting section 521, and the cam assembly 520 can be driven to rotate relative to the bracket 800 by rotating the trigger 700, so that the cam section 522 squeezes the transmission gear 210 to move axially, so as to rotate from the locked position to the unlocked position, thereby disconnecting the transmission gear 210 from the motor 100.

[0091] In some embodiments, the firing assembly also includes an elastic member 513, which is sleeved on the rotating shaft 230. When the retracted unlocking member is restored from the unlocked position to the locked position, the elastic member 513 is used to restore the transmission gear 300 or the rotating shaft 230 to a state corresponding to the connection state.

[0092] In this embodiment, the transmission gear 300 is arranged in the bracket 800, and the elastic member 513 is arranged between the transmission gears 210, 300 and the bracket 800. When the retracting unlocking member switches from the locked position to the unlocked position, the elastic member 513 is compressed to store energy. When the retracting unlocking member switches from the unlocked position to the locked position, the elastic member 513 restores the transmission gears 210, 300 or the rotating shaft 230 to a state corresponding to the connection state through its own elastic deformation.

[0093] The number of the elastic members 513 can be multiple, for example, Figure 9 and Figure 10 When the firing assembly includes the transmission gear 300, the driven gear 220, and the driving gear 400, and the driven gear 220 is fixedly connected to the rotating shaft 230, an elastic member 513 is also provided between the driven gear 220 and the bracket 800. The elastic member 513 is used to push the driven gear 220 to move and mesh with the driving gear 400. At the same time, the elastic member 513 is provided between the transmission gear 300 and the driven gear 220 to ensure that the transmission gear 300 always remains in mesh with the first transmission teeth 610.

[0094] The elastic member 513 may be a spring, a spring sheet, or an extrudable elastic body.

[0095] It should be noted that, since the transmission gears 210 and 300 are still connected to the transmission rack 600 after being disconnected from the motor 100, the rack 600 can be driven to retreat by the transmission gears 210 and 300. The specific retreat method includes but is not limited to the following embodiments.

[0096] In some embodiments, combined Figure 5-Figure 7 The transmission gear 210 is provided with a first non-circular groove 211, and the first non-circular groove 211 is used to cooperate with the rotating shaft of the rotary trigger 700. Specifically, the first non-circular groove 340 can be a key groove.

[0097] Or, combined Figures 14-21 The transmission gear 300 is provided with a first non-circular groove 340, which is used to cooperate with the rotating shaft of the rotary trigger 700. When in use, simply inserting the rotating shaft of the rotary trigger 700 into the first non-circular groove 340 can drive the transmission gear 300 to rotate, thereby driving the transmission rack 600 to retract.

[0098] In other embodiments, combined Figures 14-18 A second non-circular groove 511 is provided on the rotating nut 510, and the second non-circular groove 511 is connected to the first non-circular groove 340. The size of the second non-circular groove 511 is larger than the size of the first non-circular groove 340. The first non-circular groove 340 is used to cooperate with the second rotating shaft 720 of the rotating trigger 700.

[0099] Specifically, the shape of the non-circular groove can be a polygon such as a triangle or a quadrilateral, or an irregular shape. The corresponding rotary trigger 700 has a rotation axis that is compatible with the shape of the non-circular groove.

[0100] The rotary trigger 700 includes a first rotary shaft 710 and a second rotary shaft 720. The diameter of the first rotary shaft 710 is larger than that of the second rotary shaft 720. In actual use, the first rotary shaft 710 is first inserted into the second non-circular groove 511 of the rotary nut 510. The first rotary shaft 710 then drives the rotary nut 510 to rotate, causing the rotary nut 510 to move downward within the bracket 800 until the transmission gear 300 is disconnected from the motor 100. Next, the first rotary shaft 710 is removed, and the second rotary shaft 720 is inserted through the rotary nut 510 into the first non-circular groove 340 of the second gear 320. The trigger 700 is then rotated to rotate the second gear 320, thereby driving the rack 600 to retract.

[0101] It should be noted that an indicator arrow may be provided on the bracket 800 or the rotary trigger 700 to indicate the rotation direction of the second rotating shaft 720 to prevent the rack 600 from moving forward due to reverse rotation, thereby causing harm to the patient.

[0102] In some other embodiments, combined Figures 8-13 A non-threaded hole 820 is provided on the bracket 800, and the non-threaded hole 820 is located on the side of the threaded hole 810 close to the transmission gear 210, and the rotating nut 510 can be rotated from the threaded hole 810 to the non-threaded hole 820; a first retraction tooth 512 is provided on the end surface of the transmission gear 210 close to the rotating nut 510, and a second retraction tooth 215 is provided on the end surface of the rotating nut 510 close to the transmission gear 210; when the rotating nut 510 is located in the non-threaded hole 820, the first retraction tooth 512 cooperates with the second retraction tooth 215.

[0103] In actual use, when the motor 100 of the surgical suturing instrument fails or other mechanical failures cause the transmission to be stuck, making the motor 100 unable to drive, first rotate the rotating nut 510, and the rotating nut 510 rotates and descends in the threaded hole 810, while pushing the transmission gear 210 or the rotating shaft 230 to move until the rotating nut 510 moves into the unthreaded hole 820. At this time, the transmission gear 210 is disengaged from the motor 100; at the same time, the first retracting tooth 512 cooperates with the second retracting tooth 215. When the rotating nut 510 continues to be rotated, the rotating nut 510 will drive the transmission gear 210 to rotate through the cooperation of the first retracting tooth 512 and the second retracting tooth 215, and then drive the transmission rack 600 to retract.

[0104] Specifically, the first retraction tooth 512 and the second retraction tooth 215 are both ratchet teeth. The ratchet teeth provide one-way transmission, which means that the transmission gear 210 can only be driven to rotate when the rotating nut 510 is rotated in the retraction direction of the rack 600. Otherwise, the rotating nut 510 cannot drive the transmission gear 210 to rotate, preventing the transmission rack 600 from advancing when the rotating nut 510 is rotated in the forward direction, thereby preventing the patient from being injured.

[0105] In some embodiments, combined Figure 22 and Figure 23 The rack 600 also includes a second transmission tooth 620 arranged along the longitudinal axis direction. The second transmission tooth 620 and the first transmission tooth 610 are arranged on different sides of the transmission rack 600. The handle also includes a pawl 900. The pawl 900 is used to abut against the second transmission tooth 620 to control the retreat direction of the transmission rack 600 to prevent the transmission rack 600 from moving forward due to erroneous operation during the fault retreat process, thereby causing further harm to the patient.

[0106] Specifically, the pawl 900 can be kinematically coupled to the retraction unlocking member. When the retraction unlocking member is in the unlocked position, the pawl 900 abuts against the second transmission tooth 620, controlling the transmission rack 600 to move only in the retraction direction. When the retraction unlocking member is in the locked position, the pawl 900 disengages from the second transmission tooth 620. At this point, the pawl 900 cannot control the movement direction of the transmission rack 600, and the transmission rack 600 can move forward or backward normally.

[0107] Furthermore, the transmission rack 600 has a first position. In the first position, the staple magazine seat and the anvil are in a closed position before the stapling firing, wherein the stapling firing indicates that the transmission rack 600 moves to drive the push knife to push the wedge block of the staple magazine installed in the staple magazine seat to push the staples and suturing. The first position is the position of the rack 600 when the staple magazine seat and the anvil are in a closed state but the stapling firing has not started; when the transmission rack 600 is in the first position, the pawl 900 has an abutment position with the transmission rack 600, and the distal ends of the plurality of second transmission teeth 620 do not exceed the abutment position.

[0108] It should be noted that when the magazine seat and the anvil are in the closed position, the corresponding jaws are closed, and the transmission rack 600 is in the first position. When the magazine seat and the anvil are in the open position, that is, the jaws are open, the transmission rack 600 is defined as being in the zero position. When the jaws switch from the open state to the closed state, the transmission rack 600 needs to advance to move from the zero position to the first position; conversely, when the jaws switch from the closed state to the open state, the transmission rack 600 needs to retreat to return from the first position to the zero position. In this embodiment, the distal ends of the plurality of second transmission teeth 620 do not exceed the abutment position. That is, when the transmission rack 600 moves from the zero position to the first position, the pawl 900 cannot engage with the plurality of second transmission teeth 620. That is, the pawl 900 cannot be used to limit the movement of the transmission rack 600 in the forward direction.

[0109] In one embodiment, when the jaws are clamped with tissue and a mechanical or motor 100 failure occurs in the surgical suturing instrument, resulting in the inability to rely on the motor 100 to retract and open the jaws, it is necessary to manually disengage the driven gear 220 from the second transmission teeth 620, and then retract the transmission rack 600 through the retraction gear. However, since the transmission rack 600 can only open the jaws when it retracts, and the opened jaws cannot be closed, the opened jaws are difficult to remove from the patient's body. At this time, since the distal ends of the multiple second transmission teeth 620 do not exceed the abutment position, the pawl 900 cannot be used to limit the movement direction of the transmission rack 600, and the transmission rack 600 can be driven forward by the retraction gear, so that after the jaws are closed, or because the rack 600 is not restricted at this time, the open jaws are pressed by external force and can be passively closed, so that the instrument can be removed from the patient's body.

[0110] In another embodiment, when the jaws of the end effector are open but have not yet clamped the tissue (i.e., the transmission rack 600 is at the zero position), the motor 100 fails and the motor 100 cannot drive the transmission rack 600 forward. When the transmission rack 600 is constrained by the motor 100 and cannot be driven, since the distal ends of the plurality of second transmission teeth 620 do not exceed the abutment position, the pawl 900 cannot be used to limit the moving direction of the transmission rack 600. Therefore, the driven gear 220 can be manually disengaged from the distal end of the second transmission teeth 620, and then the transmission rack 600 can be advanced by retracting the gear, thereby closing the jaws. Alternatively, because the rack 600 is not restricted at this time, the open jaws can be passively closed by external force.

[0111] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A surgical suturing instrument, characterized in that: include: handle; a shaft assembly extending from the handle and defining a longitudinal axis; an end effector connected to an end of the shaft assembly away from the handle, the end effector comprising a cartridge seat and an anvil, the cartridge seat being rotatably connected to the anvil and movable between an open position and a closed position; The handle comprises: handle housing (10), a bracket (800), the bracket (800) being fixedly disposed in the handle housing (10); A transmission rack (600) is slidably connected to the bracket (800) along the longitudinal axis, and a first transmission tooth (610) is provided on one side of the transmission rack (600) along the longitudinal axis direction; A firing assembly comprises a motor (100) and a transmission gear (210, 300); the transmission gear (210, 300) and the motor (100) have a connected state and a disconnected state. When in the connected state, the transmission gear (210, 300) is in transmission connection with the motor (100); when in the disconnected state, the transmission gear (210, 300) and the motor (100) are disconnected from transmission. The transmission gears (210, 300) are meshed and transmitted with the first transmission teeth (610) in both the connected state and the disconnected state.

2. The surgical suturing instrument according to claim 1, characterized in that: The transmission gear (210) has an axial hole along the rotation center, and at least a portion of the axial hole is provided with a first latching structure (211). The first latching structure (211) is used to cooperate with a rotating shaft (110, 230) passing through the axial hole to enable the transmission gear (210) and the rotating shaft (110, 230) to rotate synchronously.

3. The surgical suturing instrument according to claim 2, characterized in that: The motor (100) includes the rotating shaft (110), the rotating shaft (110) is provided with a second latching structure (111), and the transmission gear (210) is sleeved on the rotating shaft (110), wherein, when in the connected state, the first latching structure (211) and the second latching structure (111) cooperate and engage with each other, so that the transmission gear (210) and the rotating shaft (110) are connected in transmission; when in the disengaged state, the transmission gear (210) moves along the rotating shaft (110), so that the first latching structure (211) and the second latching structure (111) are disengaged from each other, thereby disengaging the transmission gear (210) from the rotating shaft (110).

4. The surgical suturing instrument according to claim 2, characterized in that: The firing assembly further comprises a driving gear (400), a driven gear (220) and a rotating shaft (230); the driving gear (400) is fixedly connected to the output shaft of the motor (100); the rotating shaft (230) comprises a second latching structure (231); the driven gear (220) has a third latching structure (221); the transmission gear (210) and the driven gear (220) are both sleeved on the rotating shaft (230); Wherein, when in the connected state, the driving gear (400) is meshed with the driven gear (220), the first latching structure (211) and the second latching structure (231) are engaged with each other, and the third latching structure (221) and the second latching structure (231) are engaged with each other, so that the transmission gear (210) and the driven gear (220) are both in transmission connection with the rotating shaft (230); When in the disengaged state, the first latching structure (211) and the second latching structure (231) are disengaged from each other along the axial direction of the rotating shaft (230), so that the transmission gear (210) and the rotating shaft (230) are disengaged from each other, and / or the third latching structure (221) and the second latching structure (231) are disengaged from each other along the axial direction of the rotating shaft (230), so that the driven gear (220) and the rotating shaft (230) are disengaged from each other.

5. The surgical suturing instrument according to claim 1, characterized in that: The firing assembly further includes a driving gear (400) and a guide shaft (330); The transmission gear (300) is rotatably sleeved on the guide shaft (330), and the transmission gear (300) includes a first gear (310) and a second gear (320) coaxially fixedly connected, and the second gear (320) is meshed with the first transmission gear (610) for transmission; In the connected state, the first gear (310) and the driving gear (400) are meshed and transmitted; In the disengaged state, the transmission gear (300) moves along the guide shaft (330), so that the first gear (310) is disengaged from the meshing transmission with the driving gear (400).

6. The surgical suturing instrument according to claim 5, characterized in that: The distance between the first gear (310) and the second gear (320) is greater than or equal to the thickness of the driving gear (400); when the transmission gear (300) moves along the guide shaft (330) so that the first gear (310) and the driving gear (400) are disengaged, the driving gear (400) is located between the first gear (310) and the second gear (320).

7. The surgical suturing instrument according to any one of claims 3 to 6, characterized in that: The handle further comprises a retractable unlocking member having a locking position and an unlocking position. When the retractable unlocking member moves from the locking position to the unlocking position, the connection state is switched to the disconnection state.

8. The surgical suturing instrument according to any one of claims 3 to 6, characterized in that: The firing assembly further comprises an elastic member (513), wherein the elastic member (513) is sleeved on the rotating shaft (230) and is used to maintain the transmission gear (210, 300) or the rotating shaft (230) in a state corresponding to the connection state.

9. The surgical suturing instrument according to any one of claims 1 to 6, characterized in that: A first non-circular groove (211, 340) is provided at the center of one end of the transmission gear (210, 300), and the first non-circular groove (340) is used to cooperate with a rotating trigger (700) to drive the transmission gear (300) to rotate.

10. The surgical suturing instrument according to any one of claims 1 to 6, characterized in that: The transmission rack (600) further includes a second transmission tooth (620) arranged along the longitudinal axis direction, and the handle further includes a pawl (900), wherein the pawl (900) is used to abut against the second transmission tooth (620) to control the retraction direction of the transmission rack (600).

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