Surgical suturing instrument
By designing a switchable connection between the transmission gear and the motor in the surgical suturing instrument, the problem of the jaws being unable to open or close due to motor failure was solved, enabling free operation of the jaws and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN UNITED IMAGING HEALTHCARE SURGICAL TECH CO LTD
- Filing Date
- 2024-07-31
- Publication Date
- 2026-07-21
AI Technical Summary
If a motor malfunctions or other mechanical failures occur during the use of an electric stapler, the rack may not be able to retract or advance, causing the jaws to be unable to open or close, which may harm the patient.
A surgical suturing instrument was designed to ensure that the jaws can open or close freely in case of failure by switching between the connection and disconnection states of the transmission gear and the motor. This includes a locking structure between the transmission gear and the motor and a retraction unlocking component, enabling free operation of the jaws.
The simplified structure improves ease of operation and avoids the problem of the jaws failing to open or close due to motor failure, thus ensuring the safety and operability of the surgery.
Smart Images
Figure CN120436707B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to surgical suture instruments. Background Technology
[0002] Currently, staplers can be divided into manual staplers and electric staplers. Manual staplers are controlled manually to activate the staple cartridge assembly for suturing tissue. During use, the firing handle must be manually squeezed multiple times, and the mechanical transmission mechanism of the stapler pushes the staple cartridge assembly to close and form the suture. Improper operation can easily cause traction and tearing of the sutured tissue. Electric staplers, on the other hand, combine a DC motor, circuit board, and mechanical components. Under electric control, they fully realize all the functions of a laparoscopic stapler. The operation is simple, activation is time-saving and labor-saving, and the edges of the sutured tissue are continuous and smooth, which is more conducive to wound healing and can reduce the probability of medical accidents.
[0003] In an electric stapler, a motor drives a rack via a drive gear, which in turn moves the staple cartridge assembly to suture the tissue. As the primary drive unit, the motor is prone to malfunctions. For example, if the motor fails during use, the stapler's jaws may be clamping tissue, requiring the jaws to open and release it. Alternatively, a mechanical malfunction other than the motor may cause the transmission to jam, preventing the motor from driving. In these cases, due to the motor's self-locking property, it's difficult to drive the rack back when it's connected to the motor, preventing the jaws from opening to release the tissue and potentially harming the patient. Conversely, if the jaws are open during a malfunction, the motor's self-locking property may prevent them from closing, making it difficult to remove the stapler from the body. Summary of the Invention
[0004] Therefore, it is necessary to provide a surgical suturing instrument to address the problem of the rack being unable to retract or advance due to motor failure or other non-motor mechanical failures during the use of an electric stapler.
[0005] A surgical suturing instrument, characterized in that it comprises:
[0006] handle;
[0007] A shaft assembly extends from the handle and defines a longitudinal axis;
[0008] An end effector is connected to the end of the shaft assembly away from the handle. The end effector includes a staple cartridge seat and a staple anvil. The staple cartridge seat is rotatably connected to the staple anvil and is movable between an open position and a closed position.
[0009] The handle includes:
[0010] Handle housing;
[0011] A bracket, which is fixedly disposed inside the handle housing;
[0012] A transmission rack is slidably connected to the bracket along the longitudinal axis, and a first transmission tooth is provided on one side 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 disconnected state. When in the connected state, the transmission gear is connected to the motor; when in the disconnected state, the transmission gear is disconnected from the motor.
[0014] In both the connected state and the disengaged state, the transmission gear meshes with the first transmission gear for transmission.
[0015] In one embodiment, the transmission gear has a shaft hole along the rotation center, and at least a portion of the shaft hole is provided with a first locking structure, which is used to cooperate with a rotating shaft passing through the shaft hole to make the transmission gear rotate synchronously with the rotating shaft.
[0016] In one embodiment, the motor includes a rotating shaft with a second locking structure. The transmission gear is sleeved on the rotating shaft. When in the connected state, the first locking structure and the second locking structure engage with each other, thereby connecting the transmission gear to the rotating shaft. When in the disengaged state, the transmission gear moves along the rotating shaft, causing the first locking structure and the second locking structure to disengage, thus disengaging the transmission gear from the rotating shaft.
[0017] In one embodiment, the firing assembly further includes a drive gear, a driven gear, and a rotating shaft; the drive gear is fixedly connected to the output shaft of the motor, the rotating shaft includes a second locking structure, the driven gear has a third locking structure, and both the transmission gear and the driven gear are sleeved on the rotating shaft;
[0018] When in the connected state, the driving gear meshes with the driven gear, the first locking structure and the second locking structure cooperate to engage with each other, and the third locking structure and the second locking structure cooperate to engage with each other, so that the transmission gear and the driven gear are both connected to the rotating shaft for transmission.
[0019] When in the disengaged state, the first locking structure and the second locking structure disengage from each other along the axial direction of the rotating shaft, thereby disengaging the transmission gear from the rotating shaft, and / or the third locking structure and the second locking structure disengage from each other along the axial direction of the rotating shaft, thereby disengaging the driven gear from the rotating shaft.
[0020] In one embodiment, the firing assembly further includes a drive 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 that are coaxially fixedly connected, with the second gear meshing with the first transmission gear for transmission.
[0022] In the connected state, the first gear meshes with the driving gear for transmission;
[0023] In the disengaged state, the transmission gear moves along the guide shaft, causing the first gear to disengage from the drive 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, and when the transmission gear moves along the shaft such that the first gear disengages 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 retraction unlocking member having a locked position and an unlocked position, wherein when the retraction unlocking member moves from the locked position to the unlocked position, the connection state is switched to a disengaged state.
[0026] In one embodiment, the firing assembly further includes an elastic element sleeved on the shaft to maintain the transmission gear or the 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 disposed along the longitudinal axis, and the handle further includes a pawl for abutting against the second transmission tooth to control the retraction direction of the transmission rack.
[0029] In the aforementioned surgical suturing instrument, when in normal use, the transmission gear and motor are connected. Simultaneously, the transmission gear meshes with the first transmission gear, allowing the motor to drive the transmission rack via the transmission gear, thus enabling the opening and closing of the jaws and the push-scalpel anastomosis function. When the surgical suturing instrument malfunctions, the transmission gear and motor can be switched from the connected state to the disconnected state. In this state, the transmission gear and motor are disengaged, meaning the motor cannot drive the transmission gear or rotate. Therefore, in the event of a malfunction, the motor's self-locking property does not restrict its operation, allowing the jaws to open or close by driving the transmission rack backward or forward. This addresses the issues of jaw malfunction requiring opening when gripping tissue, and jaw malfunction requiring closing to remove tissue from the body when the jaws are open. Furthermore, since the transmission gear meshes with the first transmission gear in both the connected and disconnected states, when the transmission gear is disconnected from the motor, it can drive the transmission rack to retract or advance, thereby opening or closing the jaws. This design simplifies the structure and improves the ease of operation. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the handle and rotary wrench in one embodiment.
[0031] Figure 2 This is a schematic diagram of the connection structure of the firing mechanism, the retraction unlocking component, and the rotary wrench in one embodiment.
[0032] Figure 3 for Figure 2 A schematic diagram of the intermediate transmission gear and the motor in the connected state.
[0033] Figure 4 for Figure 2 A schematic diagram of the transmission gear and the motor in the disengaged state.
[0034] Figure 5 for Figure 2 A schematic diagram of the firing mechanism when the rotary wrench is retracted.
[0035] Figure 6 for Figure 2 A schematic diagram of the transmission gear in the diagram.
[0036] Figure 7 for Figure 2 A schematic diagram of the rotary wrench.
[0037] Figure 8 This is a schematic diagram of the connection structure of the firing mechanism, the retraction unlocking component, and the rotary wrench in one embodiment.
[0038] Figure 9 for Figure 8A schematic diagram of the transmission gear and motor in the connected state.
[0039] Figure 10 for Figure 8 A schematic diagram of the transmission gears in the motor when they are disengaged.
[0040] Figure 11 for Figure 8 A schematic diagram of the structure in which the rotating shaft abuts against the rotating nut.
[0041] Figure 12 for Figure 8 A schematic diagram of the front and back sides of the transmission gear.
[0042] Figure 13 This is a schematic diagram of the support structure.
[0043] Figure 14 This is a schematic diagram of the connection structure between the firing mechanism and the retraction unlocking component in one embodiment.
[0044] Figure 15 for Figure 14 A schematic diagram of the intermediate transmission gear and the motor in the connected state.
[0045] Figure 16 for Figure 14 A schematic diagram of the transmission gear and the motor in the disengaged state.
[0046] Figure 17 for Figure 14 A schematic diagram of the structure of the rotating nut.
[0047] Figure 18 for Figure 14 A schematic diagram of the transmission gear.
[0048] Figure 19 This is a schematic diagram of the connection structure of the firing mechanism, the retraction unlocking component, and the rotary wrench in one embodiment.
[0049] Figure 20 for Figure 19 A schematic diagram of the intermediate transmission gear and the motor in the connected state.
[0050] Figure 21 for Figure 19 A schematic diagram of the transmission gear and the motor in the disengaged state.
[0051] Figure 22 This is a schematic diagram of the pawl disengaging from the second transmission tooth in one embodiment.
[0052] Figure 23 This is a schematic diagram of the pawl disengaging from the second transmission tooth in one embodiment.
[0053] Reference numerals: 10, Handle housing; 100, Motor; 110, Rotating shaft; 111, Second locking structure; 210, Transmission gear; 211, First locking structure; 212, First non-circular groove; 214, Idle groove; 215, Second return gear; 216, Circular hole; 220, Driven gear; 221, Third locking structure; 230, Rotating shaft; 231, Second locking structure; 232, Cylindrical structure; 300, Transmission gear; 310, First gear; 320, Second gear; 330, Guide shaft; 340, First non-circular groove; 400, Drive gear; 510, Rotating nut; 511, Second non-circular groove; 512, First retraction tooth; 513, Elastic element; 514, Abutment part; 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 Implementation
[0054] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0055] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0056] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0058] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0059] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, 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 possible implementation.
[0060] See Figures 1-21One embodiment of this application discloses a surgical suturing instrument, which includes 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 the end of the shaft assembly away from the handle, and the end effector includes a staple cartridge seat and an anvil, the staple cartridge seat and the anvil being 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 installed inside the handle housing 10. The 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. The firing assembly includes a motor 100 and transmission gears 210 and 300. The transmission gears 210 and 300 have a connected state and a disconnected state with the motor 100. When in the connected state, the transmission gears 210 and 300 are connected to the motor 100. When in the disconnected state, the transmission gears 210 and 300 are disengaged from the motor 100. In both the connected and disconnected states, the transmission gears 210 and 300 are engaged with the first transmission tooth 610.
[0061] The handle is connected to the end effector via a shaft assembly. An actuation assembly is installed inside the handle. The actuation assembly is connected to the end effector via a transmission rack 600. When the rack 600 moves, it enables the staple cartridge seat and the anvil to move between the open and closed positions, i.e., the jaws open or close.
[0062] In this embodiment, when the surgical suture instrument is in normal use, the transmission gears 210 and 300 are connected to the motor 100. At this time, the transmission gears 210 and 300 are connected to the motor 100 in a transmission manner. At the same time, the transmission gears 210 and 300 mesh with the first transmission gear 610, that is, the motor 100 can drive the transmission rack 600 to move through the transmission gears 210 and 300 to realize the opening and closing of the jaws. When the surgical suture instrument malfunctions, the transmission gears 210 and 300 can be switched from the connected state to the disconnected state with the motor 100. At this time, the transmission gears 210 and 300 are disengaged from the motor 100, that is, the motor cannot drive the transmission gears 210 and 300 to rotate. In other words, in the event of a malfunction, it is not limited by the self-locking property of the motor 100, and the jaws can be opened or closed by driving the transmission rack 600 to retract or advance. This solves the problem of jaws needing to be opened when they malfunction while clamping tissue, and the problem of jaws needing to be closed to be pulled out of the body when they malfunction while the jaws are open in the body.
[0063] Furthermore, since the transmission gears 210 and 300 are engaged with the first transmission gear 610 in both the connected and disconnected states, when the transmission gears 210 and 300 are disconnected from the motor 100, the transmission rack 600 can be driven to retract or advance by driving the transmission gears 210 and 300, thereby opening or closing the jaws. This design simplifies the structure and improves the ease of operation.
[0064] Combination Figures 2-12 In some embodiments, the transmission gear 210 has a shaft hole along the rotation center, and at least a portion of the shaft hole is provided with a first locking structure 211. The first locking structure 211 is used to cooperate with the rotating shafts 110 and 230 passing through the shaft hole so that the transmission gear 210 rotates synchronously with the rotating shafts 110 and 230.
[0065] In this embodiment, when the first locking structure 211 engages with the rotating shafts 110 and 230, the motor 100 can drive the transmission gear 210 to rotate via the rotating shafts 110 and 230, ensuring the normal use of the surgical suture instrument. When the first locking structure 211 disengages 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, meaning the motor cannot drive the transmission gear 210 to rotate, and is therefore not subject to the self-locking property of the motor 100, thus allowing the drive rack 600 to retract.
[0066] Combination Figures 2-7 In some embodiments, the motor 100 includes a rotating shaft 110, which is provided with a second locking structure 111. A transmission gear 210 is sleeved on the rotating shaft 110. When in a connected state, the first locking structure 211 and the second locking structure 111 engage with each other, so that the transmission gear 210 is connected to the rotating shaft 110 in a transmission connection. 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 disengage 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 and the second locking structure 111 engage, 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 disengages 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 can also move relative to the transmission gear 210, so that the first locking structure 211 can engage or disengage from the second locking structure 111.
[0069] In this structure, one of the first locking structure 211 and the second locking structure 111 is a keyway, and the other is a key. When the key is located in the keyway, the first locking structure 211 and the second locking structure 111 cooperate. When the key is disengaged from the keyway, the first locking structure 211 and the second locking structure 111 disengage from each other.
[0070] Combination Figure 6 Specifically, the first locking structure 211 is a keyway formed within the transmission gear 210. The transmission gear 210 also has a free-spinning groove 214 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 to the point where the key on the output shaft of the motor 100 is located within the free-spinning groove 214, the motor 100 idles, meaning it cannot drive the transmission gear 210 to rotate.
[0071] Combination 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 locking structure 231, the driven gear 220 has a third locking structure 221, and both the transmission gear 210 and the driven gear 220 are sleeved on the rotating shaft 230; wherein, when in the connected state, the engagement... Figure 9 The driving gear 400 meshes with the driven gear 220. The first locking structure 211 and the second locking structure 231 engage with each other, and the third locking structure 221 engages with the second locking structure 231, so that both the transmission gear 210 and the driven gear 220 are connected to the rotating shaft 230 for transmission. When in the disengaged state, the engagement... Figure 10 The first locking structure 211 and the second locking structure 231 disengage from each other along the axial direction of the rotating shaft 230, thereby disengaging the transmission gear 210 from the rotating shaft 230, and / or the third locking structure 221 and the second locking structure 231 disengage from each other along the axial direction of the rotating shaft 230, thereby disengaging the driven gear 220 from the rotating shaft 230.
[0072] In this embodiment, both the driven gear 220 and the transmission gear 210 are sleeved on the rotating shaft 230 and can slide axially on the rotating shaft 230. The second locking structure 231 is a non-circular column, such as a rectangular column or a triangular column, provided on the rotating shaft 230, or the second locking structure 231 is a guide key provided on the rotating shaft 230. Correspondingly, the first locking structure 211 and the third locking structure 221 are both grooves that mate with the second locking structure 231.
[0073] When the driven gear 220 engages with the second locking structure 231 on the rotating shaft 230 via the third locking structure 221, and the transmission gear 210 engages with the second locking structure 231 on the rotating shaft 230 via the first locking structure 211, the rotating shaft 230 rotates synchronously with the transmission gear 210 and the driven gear 220. Simultaneously, because the driving gear 400 meshes with the driven gear 220, the motor 100 can sequentially drive the rack 600 to move via the driving gear 400, the driven gear 220, the rotating shaft 230, and the transmission gear 210. When the first locking structure 211 on the transmission gear 210 disengages from the second locking structure 231 on the rotating shaft 230, and / or when the third locking structure 221 on the driven gear 220 disengages from the second locking structure 231 on the rotating shaft 230, the motor 100 cannot drive the transmission gear 210 to rotate; that is, the transmission gear 210 disengages from the self-locking mechanism of the motor 100.
[0074] Furthermore, in combination Figure 11 The rotating shaft 230 includes a cylindrical structure 232 and a square column structure disposed at one end of the cylindrical structure. The square column structure serves as a second locking structure 231. The driven gear 220 is fixedly connected to the square column structure. The rotating shaft 230 can move axially relative to the transmission gear 210, allowing the transmission gear 210 to switch between engaging with the cylindrical structure and engaging with the square column structure. Correspondingly, combined with... Figure 12 The transmission gear 210 has a circular hole 216 and a square hole that are interconnected. The square hole serves as the first locking structure 211. When the transmission gear 210 moves onto the square column structure, the square hole engages with the square column structure, and the transmission gear 210 is connected to the motor 100. When the transmission gear 210 moves onto the cylindrical structure, the circular hole engages with the cylindrical structure, and the transmission gear 210 is disengaged from the motor 100.
[0075] Of course, the transmission gear 210 can also slide axially relative to the rotating shaft 230, so that the transmission gear 210 can switch between cooperating with the cylindrical structure or cooperating with the square column structure.
[0076] Combination Figures 14-21 In some embodiments, the firing assembly further includes a drive gear 400 and a guide shaft 330; a 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, the second gear 320 meshing with the first transmission gear 610; in the connected state, the first gear 310 meshes with the drive gear 400; in the disengaged state, the transmission gear 210 moves along the guide shaft 330, causing the first gear 310 to disengage from the drive gear 400.
[0077] In this embodiment, when connected, 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 gear 610 for transmission, the driving gear 400 can sequentially drive the transmission rack 600 to move via the first gear 310, the second gear 320, and the first transmission gear 610. When it is necessary to disengage the motor 100 from the transmission gear 300, the transmission gear 300 moves along the guide shaft 330, so that the first gear 310 disengages from the driving gear 400, i.e., the transmission gear 300 is disengaged 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 positioned between the first gear 310 and the second gear 320. In a specific embodiment, it is preferable 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 the accuracy and stability of 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 the connected state to the 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 retraction unlocking member having a locked position and an unlocked position. When the retraction unlocking member moves from the locked position to the unlocked position, the connection state is switched to a disengaged state. The retraction unlocking member abuts against one end of the transmission gear 300 or the rotating shaft 230. The specific structure of the retraction unlocking member includes, but is not limited to, the following embodiments.
[0081] In some embodiments, combined Figures 14-17 The retraction unlocking component is a rotating nut 510, located at one end of the rotating shaft of the transmission gears 210 and 300. The rotating nut 510 is threadedly connected to the bracket 800. A second non-circular groove 511 is provided at the end of the rotating nut 510 away from the transmission gears 210 and 300. The second non-circular groove 511 is used to cooperate with the first rotating shaft 710 of the rotating trigger 700 to drive the rotating nut 510 to rotate. When the rotating nut 510 is in the locked position, the transmission gears 210 and 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 and 300 disengage from the motor 100, the rotating nut 510 is in the unlocked position.
[0082] In actual use, when the surgical suture instrument malfunctions due to a motor 100 failure or other mechanical failure causing the transmission to jam and preventing the motor 100 from being driven, the first rotating shaft 710 of the rotating trigger 700 can be inserted into the second non-circular groove 511 of the rotating nut 510. Then, the rotating trigger 700 drives 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 disengaging the transmission gears 210 and 300 from the motor 100.
[0083] In other embodiments, similarly, the retraction unlocking component is a rotating nut 510. A rotating nut 510 is provided at one end of the rotating shaft of the transmission gears 210 and 300. The rotating nut 510 is threadedly connected to the bracket 800. A second non-circular groove 511 is provided at the end of the rotating nut 510 away from the transmission gears 210 and 300. The second non-circular groove 511 is used to cooperate with the rotating trigger 700 to drive the rotating nut 510 to rotate. Unlike the previous embodiment, in combination with… Figures 8-11 The rotating nut 510 has an abutment portion 514 at one end near 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 surgical suture instrument malfunctions due to a motor 100 failure or other mechanical failure causing the transmission to jam and the motor 100 to be unable to drive, the rotating trigger 700 can be inserted into the second non-circular groove 511 of the rotating nut 510. The rotating trigger 700 drives the rotating nut 510 to rotate relative to the bracket 800, thereby causing the rotating nut 510 to move axially to press the rotating shaft 230, thereby causing the second locking structure 231 on the rotating shaft 230 to disengage from the first locking structure 211 of the transmission gear 210.
[0085] In some other embodiments, there is no need to set a retraction unlocking device. A first non-circular groove 340 is provided at the center 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 moved axially by directly pressing the rotating trigger 700.
[0086] In actual use, when the surgical suture instrument malfunctions due to a motor 100 failure or other mechanical failure causing the transmission to jam and the motor 100 to be unable to drive, the rotating trigger 700 is inserted into the first non-circular groove 340 of the transmission gear 300 and pushed axially along the transmission gear 300, thereby disengaging the transmission gear 300 from the motor 100.
[0087] Furthermore, in the above embodiments, the handle housing 10 is provided with an operating port corresponding to the first non-circular groove 340 or the second non-circular groove 511. The operating port is 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. The first operating port can be correspondingly provided, and the first non-circular groove 340 is used to cooperate with the wrench 700 to drive the transmission gear 300 to rotate. The second operating port can also be correspondingly provided. In some embodiments, the operating port is provided with a cover plate rotatably connected to the handle housing 10. In case of a malfunction, 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 Figures 2-4 The retraction unlocking mechanism is a cam assembly 520, which is located on the support 800 near the operating port. The cam assembly 520 includes a connecting section 521 and a cam section 522 connected to each other. The cam section 522 abuts against the transmission gear 210. The connecting section 521 has a insertion hole for engaging with the rotary trigger 700 to rotate the cam assembly 520, thereby driving the transmission gear 210 to move axially. The cam assembly 520 can rotate from a locked position to an unlocked position. When the cam assembly 520 is in the locked position, the transmission component is connected to the motor 100, at which point the surgical suture instrument can operate normally.
[0089] The insertion hole can be circular or non-circular, as long as the rotating trigger 700 is inserted into the insertion hole and can drive the cam assembly 520 to rotate.
[0090] In actual use, when the surgical suture instrument malfunctions due to a motor 100 failure or other mechanical failure causing the transmission to jam and the motor 100 to be unable to drive, the rotating trigger 700 can be inserted into the insertion hole of the connecting section 521. By rotating the trigger 700, the cam assembly 520 is driven to rotate relative to the bracket 800, which in turn causes the cam section 522 to press the transmission gear 210 to move axially, so as to rotate from the locked position to the unlocked position, thereby disengaging the transmission gear 210 from the motor 100.
[0091] In some embodiments, the firing assembly further includes an elastic element 513, which is sleeved on the rotating shaft 230. When the retraction unlocking member returns from the unlocked position to the locked position, the elastic element 513 is used to restore the transmission gear 300 or the rotating shaft 230 to the state corresponding to the connection state.
[0092] In this embodiment, the transmission gear 300 is disposed within the bracket 800, and the elastic element 513 is disposed between the transmission gears 210 and 300 and the bracket 800. When the retraction unlocking member switches from the locked position to the unlocked position, the elastic element 513 is compressed and stores energy. When the retraction unlocking member switches from the unlocked position to the locked position, the elastic element 513 causes the transmission gears 210 and 300 or the rotating shaft 230 to return to the state corresponding to the connection state through its own elastic deformation.
[0093] The number of elastic elements 513 can be multiple, for example, combined with Figure 9 and Figure 10 When the firing assembly includes a drive gear 300, a driven gear 220, and a driving gear 400, and the driven gear 220 is fixedly connected to the rotating shaft 230, an elastic element 513 is also provided between the driven gear 220 and the bracket 800. This elastic element 513 is used to push the driven gear 220 to move and engage with the driving gear 400. At the same time, an elastic element 513 is provided between the drive gear 300 and the driven gear 220, which is used to ensure that the drive gear 300 always remains engaged with the first drive gear 610.
[0094] The elastic element 513 can be a spring, a sheet, or a compressible elastic body.
[0095] It should be noted that, since the transmission gears 210 and 300 remain connected to the transmission rack 600 after they are disconnected from the motor 100, the rack 600 can be driven to retract by the transmission gears 210 and 300. The specific retraction methods include, but are not limited to, the following embodiments.
[0096] In some embodiments, combined with Figures 5-7 The transmission gear 210 has a first non-circular groove 211, which is used to mate with the rotating shaft of the rotary trigger 700. Specifically, the first non-circular groove 340 can be a keyway.
[0097] Or, combine Figures 14-21 The transmission gear 300 has a first non-circular groove 340, which is used to engage with the rotating shaft of the rotary trigger 700. In use, the rotating shaft of the rotary trigger 700 is directly inserted into the first non-circular groove 340, which drives the transmission gear 300 to rotate, thereby driving the transmission rack 600 to retract.
[0098] In other embodiments, combined with Figures 14-18 The rotating nut 510 has a second non-circular groove 511, which is connected to the first non-circular groove 340. The size of the second non-circular groove 511 is larger than that 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 triangle, a quadrilateral, or other polygonal or irregular shape. The corresponding rotary trigger 700 has a rotary shaft adapted to the shape of the non-circular groove.
[0100] The rotary trigger 700 includes a first rotating shaft 710 and a second rotating shaft 720, with the diameter of the first rotating shaft 710 being larger than that of the second rotating shaft 720. In actual use, the first rotating shaft 710 is first inserted into the second non-circular groove 511 of the rotating nut 510. Then, the first rotating shaft 710 drives the rotating nut 510 to rotate, causing it to move downward within the bracket 800 until the transmission gear 300 disengages from the motor 100. Next, the first rotating shaft 710 is pulled out, and the second rotating shaft 720 is inserted through the rotating nut 510 into the first non-circular groove 340 of the second gear 320. The rotary trigger 700 drives the second gear 320 to rotate, which in turn drives the rack 600 to retract.
[0101] It should be noted that an indicator arrow can be provided on the bracket 800 or the rotating trigger 700 to indicate the rotation direction of the second rotating shaft 720, preventing the rack 600 from moving forward due to reverse rotation, which could cause injury to the patient.
[0102] In yet other embodiments, combined with Figures 8-13 The bracket 800 has a threadless hole 820 located on the side of the threaded hole 810 near the transmission gear 210. The rotating nut 510 can rotate from the threaded hole 810 to the threadless hole 820. The end face of the transmission gear 210 near the rotating nut 510 is provided with a first retraction tooth 512 and the end face of the rotating nut 510 near the transmission gear 210 is provided with a second retraction tooth 215. When the rotating nut 510 is located in the threadless hole 820, the first retraction tooth 512 and the second retraction tooth 215 cooperate.
[0103] In actual use, when the surgical suture instrument experiences a motor 100 malfunction or other mechanical failure that causes the transmission to jam, preventing the motor 100 from being driven, first rotate the rotating nut 510. The rotating nut 510 rotates and descends in the threaded hole 810, simultaneously 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 point, the transmission gear 210 disengages from the motor 100. At the same time, the first return tooth 512 and the second return tooth 215 engage. When the rotating nut 510 is rotated further, the rotating nut 510 will drive the transmission gear 210 to rotate through the engagement of the first return tooth 512 and the second return tooth 215, thereby driving the transmission rack 600 to retract.
[0104] Specifically, both the first retraction tooth 512 and the second retraction tooth 215 are ratchet teeth. Through the unidirectional transmission action of the ratchet teeth, the transmission gear 210 can only be driven to rotate when the rotating nut 510 rotates in the retraction direction of the rack 600; otherwise, the rotating nut 510 cannot drive the transmission gear 210 to rotate. This prevents the transmission rack 600 from advancing when the rotating nut 510 rotates in the forward direction, thus avoiding injury to the patient.
[0105] In some embodiments, combined with Figure 22 and Figure 23 The rack 600 also includes a second transmission tooth 620 arranged along the longitudinal axis. The second transmission tooth 620 and the first transmission tooth 610 are arranged on different sides of the rack 600. The handle also includes a pawl 900, which is used to abut against the second transmission tooth 620 to control the retraction direction of the rack 600, so as to prevent the rack 600 from moving forward due to misoperation during the retraction process and further causing injury to the patient.
[0106] Specifically, the pawl 900 can be motion-coupled with the retraction unlocking mechanism. When the retraction unlocking mechanism 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 mechanism is in the locked position, the pawl 900 disengages from the second transmission tooth 620. At this time, the pawl 900 cannot be used to 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 which the staple cartridge seat and the anvil are in a closed position before engagement firing. Engagement firing means that the transmission rack 600 moves to drive the pusher to push the wedge block of the staple cartridge installed in the staple cartridge seat for staple pushing and sewing. The first position is the position of the rack 600 when the staple cartridge seat and the anvil are in a closed state but engagement firing has not started. When the transmission rack 600 is in the first position, the pawl 900 has an abutting position with the transmission rack 600, and the distal ends of the plurality of second transmission teeth 620 do not exceed the abutting position.
[0108] It should be noted that when the staple cartridge holder and anvil are in the closed position, the corresponding jaws are closed, and the drive rack 600 is in the first position. When the staple cartridge holder and anvil are in the open position, i.e., the jaws are open, the drive rack 600 is defined as being in the zero position. When the jaws switch from the open state to the closed state, the drive rack 600 needs to move forward to move from the zero position to the first position; conversely, when the jaws switch from the closed state to the open state, the drive rack 600 needs to move backward to return from the first position to the zero position. In this embodiment, the distal ends of the plurality of second drive teeth 620 do not exceed the abutment position, that is, when the drive rack 600 moves from the zero position to the first position, the pawl 900 cannot engage with the plurality of second drive teeth 620, i.e., the pawl 900 cannot be used to restrict the movement of the drive rack 600 in the forward direction.
[0109] In one embodiment, if the clamps are gripping tissue and the surgical suture instrument malfunctions (either mechanically or via motor 100), preventing the clamps from opening by motor 100 retraction, the driven gear 220 needs to be manually disengaged from the second transmission gear 620. Then, the transmission rack 600 is retracted via the retraction gear. However, since the retraction of the transmission rack 600 only opens the clamps but cannot close them, the open clamps are difficult to remove from the patient. At this point, because the distal ends of the multiple second transmission gears 620 do not extend beyond the contact position, the pawl 900 cannot be used to limit the movement direction of the transmission rack 600. The retraction gear can then drive the transmission rack 600 forward, allowing the clamps to close. Alternatively, because the rack 600 is not restricted at this time, the open clamps may be passively closed by external pressure, allowing the instrument to be removed from the patient.
[0110] In another embodiment, when the jaws of the end effector are open but have not yet gripped any tissue (i.e., the drive rack 600 is at the zero point), and a malfunction occurs in the motor 100 causing it to be unable to drive the drive rack 600 forward, and the drive rack 600 is constrained by the motor 100 and cannot be driven, since the distal ends of the multiple second drive teeth 620 do not exceed the contact position, i.e., the pawl 900 cannot be used to limit the direction of movement of the drive rack 600, the driven gear 220 can be manually disengaged from the distal ends of the second drive teeth 620 first, and then the drive rack 600 can be moved forward by retracting the gear, thereby causing the jaws to close, or because the rack 600 is not constrained at this time, the open jaws can be passively closed by external pressure.
[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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 embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A surgical suturing instrument, characterized in that, include: handle; A shaft assembly extends from the handle and defines a longitudinal axis; An end effector is connected to the end of the shaft assembly away from the handle. The end effector includes a staple cartridge seat and a staple anvil. The staple cartridge seat is rotatably connected to the staple anvil and is movable between an open position and a closed position. The handle includes: Handle housing (10), A bracket (800) is fixedly disposed inside 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. The firing assembly includes a motor (100) and transmission gears (210, 300); the transmission gears (210, 300) and the motor (100) have a connected state and a disconnected state. When in the connected state, the transmission gears (210, 300) are connected to the motor (100); when in the disconnected state, the transmission gears (210, 300) are disconnected from the motor (100). In both the connected state and the disengaged state, the transmission gears (210, 300) mesh with the first transmission gear (610) for transmission. The firing assembly also includes a drive 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) that are coaxially fixedly connected, and the second gear (320) meshes with the first transmission gear (310) for transmission. In the connected state, the first gear (310) meshes with the driving gear (400) for transmission; In the disengaged state, the transmission gear (300) moves along the guide shaft (330), causing the first gear (310) to disengage from the drive gear (400); 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) such that the first gear (310) disengages from the driving gear (400), the driving gear (400) is located between the first gear (310) and the second gear (320).
2. The surgical suturing instrument according to claim 1, characterized in that, The handle also includes a retraction unlocking component, which has a locked position and an unlocked position. When the retraction unlocking component moves from the locked position to the unlocked position, the connection state is switched to the disengaged state.
3. The surgical suturing instrument according to claim 1, characterized in that, The firing assembly further includes an elastic element (513) sleeved on the rotating shaft (230) for maintaining the transmission gear (210, 300) or the rotating shaft (230) in a state corresponding to the connection state.
4. The surgical suturing instrument according to claim 1, characterized in that, The transmission gear (210, 300) has a first non-circular groove (211, 340) at the center of one end. The first non-circular groove (340) is used to cooperate with the rotary trigger (700) to drive the transmission gear (300) to rotate.
5. The surgical suturing instrument according to claim 1, characterized in that, The transmission rack (600) further includes a second transmission tooth (620) arranged along the longitudinal axis, and the handle further includes a pawl (900) for abutting against the second transmission tooth (620) to control the retraction direction of the transmission rack (600).