Emergency device and surgical instrument

Abstract

The application provides an emergency device and a surgical instrument. The surgical instrument comprises a transmission mechanism, a connecting mechanism connected with the transmission mechanism, and an electric mechanism. The connecting mechanism comprises a first gear. The connecting mechanism is disconnected with the electric mechanism by disconnecting the first gear from the electric mechanism. The emergency device comprises a movable shaft movably arranged in the first gear. When the movable shaft and the first gear are in a first matching state, the first gear can rotate around the movable shaft. When the movable shaft and the first gear are in a second matching state, the first gear is limited to rotate around the movable shaft. The first gear can be driven to move by the movement of the movable shaft to disconnect with the electric mechanism. The movement direction of the movable shaft is consistent with the movement direction of the first gear. The application can realize the manual reset of the transmission mechanism after the anastomat is fired, which is beneficial to the convenient operation of the doctor in the emergency environment and ensures the smooth operation of the surgery.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to an emergency device and a surgical instrument. Background Technology

[0002] In existing technologies, some surgical instruments require the surgeon to operate a firing mechanism proximally to drive a transmission shaft distally, thereby driving a distal actuator to perform the corresponding surgical procedure. Taking a surgical stapler as an example, a conventional surgical stapler includes a stapler body, a firing handle movably connected to the stapler body, and an end effector that cooperates with the stapler body. The stapler body includes a drive assembly. The end effector includes an anvil assembly and a staple cartridge assembly arranged opposite each other. During surgery, tissue is placed between the anvil of the anvil assembly and the staple cartridge of the staple cartridge assembly. The distance between the anvil and the staple cartridge is adjusted to gradually clamp the tissue. Then, by operating the firing handle, the drive assembly moves distally, causing the staples to be formed on the anvil, completing the tissue anastomosis.

[0003] During operation, surgeons often need to apply considerable force to the firing mechanism (such as the firing handle) to complete the surgery, which is quite inconvenient. Therefore, electrically driven surgical instruments were developed. The surgeon simply starts the motor, causing the output shaft to rotate in a specific direction, which moves the drive mechanism distally. After the surgery, the motor output shaft can be rotated in the opposite direction, moving the drive mechanism proximally to reset the instrument. However, when the motor and related mechanical and electronic components malfunction, the electric retraction function may fail, preventing the instrument from resetting to open the end effector jaws and hindering the surgery.

[0004] In this application, the distal side and proximal side are relative to the operator. The end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical position, is the distal side. Summary of the Invention

[0005] To address the problems in the prior art, the purpose of this application is to provide an emergency device and surgical instrument that allows for manual reset of the transmission mechanism when it cannot be reset by an electric mechanism after the stapler is fired.

[0006] This application provides an emergency device for surgical instruments. The surgical instruments include a transmission mechanism that can be driven to move towards or away from the actuating end of the surgical instruments, a connecting mechanism connected to the transmission mechanism, and an electric mechanism connected to the connecting mechanism and driving the connecting mechanism to move the transmission mechanism. The connecting mechanism includes a first gear, and the connecting mechanism is disengaged from the electric mechanism by means of the first gear. The emergency device includes:

[0007] A movable shaft is movably inserted into the first gear. When the movable shaft and the first gear are in a first engagement state, the first gear can rotate around the movable shaft. When the movable shaft and the first gear are in a second engagement state, the first gear is restricted from rotating around the movable shaft, and the first gear can be driven to move by the movement of the movable shaft to disengage from the electric mechanism. The direction of movement of the movable shaft is consistent with the direction of movement of the first gear.

[0008] In some embodiments, when the movable shaft and the first gear are in a first relative position, the movable shaft and the first gear are in the first engagement state;

[0009] When the movable shaft and the first gear are in a second relative position, the movable shaft and the first gear are in a second engagement state;

[0010] The movable shaft moves along a first direction, thereby changing the movable shaft and the first gear from a first relative position to a second relative position. The first direction is perpendicular to the direction in which the transmission mechanism moves toward or away from the actuating end of the surgical instrument.

[0011] In some embodiments, the movable shaft includes a first mating part, a second mating part, and a third mating part, and the first gear includes a fourth mating part and a fifth mating part;

[0012] When the movable shaft and the first gear are in the first engagement state, the first engagement part engages with the fourth engagement part to allow the first gear to rotate around the movable shaft;

[0013] When the movable shaft and the first gear are in the second engagement state, the second engagement part engages with the fourth engagement part to restrict the first gear from rotating around the movable shaft;

[0014] When the movable shaft is driven to move, the third mating part and the fifth mating part cooperate to drive the first gear to move, so that the first gear is disengaged from the electric mechanism.

[0015] In some embodiments, the first gear includes a shaft hole, the movable shaft passes through the shaft hole of the first gear, and the movable shaft is provided with a first threaded portion;

[0016] The emergency device also includes a drive component, which has a second threaded portion that mates with the first threaded portion. When the drive component rotates, it drives the movable shaft to move.

[0017] In some embodiments, the two ends of the movable shaft protrude beyond the two end faces of the first gear, the first threaded portion is provided at the first end of the movable shaft, the third mating portion is provided at the second end of the movable shaft, and the outer diameter of the third mating portion is larger than the inner diameter of the shaft hole of the first gear.

[0018] In some embodiments, the first mating portion of the movable shaft is located between the first threaded portion and the second mating portion, and the outer diameter of the first mating portion is less than or equal to the inner diameter of the shaft hole of the first gear.

[0019] In some embodiments, after the first gear is disengaged from the electric mechanism, when the movable shaft is driven to rotate by the rotation of the drive member, the first gear is driven to rotate through the engagement of the second mating part and the fourth mating part.

[0020] In some embodiments, an elastic element is further included, the elastic element being configured to apply a biasing force to the first gear in a second direction opposite to the first direction.

[0021] In some embodiments, the first threaded portion is an external thread distributed on the outer surface of the movable shaft, the drive member is at least partially sleeved on the outside of the first threaded portion, and the second threaded portion is an internal thread provided on the inside of the drive member.

[0022] In some embodiments, a first operating lever is further included, wherein the first end of the first operating lever is provided with the driving element.

[0023] In some embodiments, the first end of the first operating lever is provided with a mating hole or a mating groove, and the driving member is at least partially embedded in the mating hole or the mating groove.

[0024] In some embodiments, the outer surface of the drive member engages with the inner surface of the mating hole or the mating groove to form a connection that cannot be rotated relative to each other.

[0025] In some embodiments, the drive element is detachably connected to the first end of the first operating lever.

[0026] In some embodiments, a second operating lever is further included, which is connected to a second end of the first operating lever.

[0027] In some embodiments, an outer support is also included, wherein the first gear and the movable shaft are at least partially located inside the outer support;

[0028] The outer support has a receiving groove on one side, and the second operating rod can be at least partially located in the receiving groove.

[0029] In some embodiments, the electric mechanism includes a motor and a motor gear set, the output shaft of the motor being capable of driving the motor gear set to rotate, the motor gear set being at least partially located on one side of the first gear along a second direction, the second direction being opposite to the first direction, the motor gear set including a second gear, and when the electric mechanism is connected to the connecting mechanism, the first gear meshes with the second gear, and the output shaft of the motor is parallel to the first direction.

[0030] In some embodiments, the motor gear set includes a first motor gear and a second motor gear, and the axes of the first motor gear and the second motor gear are intersected. The output shaft of the motor is parallel to the first direction, or the output shaft of the motor has an angle with the first direction.

[0031] This application also provides a surgical instrument, including the emergency device described above.

[0032] The emergency device and surgical instruments provided in this application have the following advantages:

[0033] By adopting this application, when the transmission mechanism cannot be reset by the electric mechanism after the instrument is fired, the first gear can be driven by the movable shaft to disengage from the electric mechanism, and the transmission mechanism can be reset by driving the first gear to rotate by the movable shaft. This enables emergency manual reset of the transmission mechanism, which is beneficial for doctors to operate conveniently in emergency environments, thereby ensuring the smooth progress of the operation.

[0034] In addition, since the first end of the first operating lever is provided with a driving component, and the driving component is provided with a second threaded part that mates with the first threaded part of the movable shaft, when the driving component rotates, it drives the movable shaft to move. This ensures that the first operating lever remains connected to the movable shaft and does not fall off during the operation of the emergency device by the doctor, thereby smoothly realizing the emergency manual reset transmission mechanism. This avoids the inability to smoothly realize the emergency manual reset transmission mechanism due to the first operating lever falling off the movable shaft, which would further increase the doctor's tension in the emergency environment and affect the surgical outcome. Attached Figure Description

[0035] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0036] Figures 1-3 This is a schematic diagram of the emergency device and other components of the instrument according to the first embodiment of this application.

[0037] Figure 4 This is a schematic diagram of the structure of the external support according to the first embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the emergency device after omitting the external support and its cooperation with other components of the instrument according to the first embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the emergency device after omitting the external and internal supports, and its coordination with other components of the device, according to the first embodiment of this application.

[0040] Figure 7 This is a front view of the emergency device and other components of the instrument after omitting the outer and inner supports according to the first embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the interaction between the movable shaft and other components of the instrument according to the first embodiment of this application;

[0042] Figure 9 This is a schematic diagram of the structure of the operating mechanism and driving component in the first embodiment of this application.

[0043] Figure 10 This is a schematic diagram of the structure of the movable shaft and the first gear in the first embodiment of this application;

[0044] Figure 11 and Figure 12 This is a schematic diagram of the movable shaft disengaging from the first gear according to the first embodiment of this application;

[0045] Figure 13 This is a schematic diagram showing the emergency device cooperating with other components of the device after the first gear of the first embodiment of this application is disengaged from the electric mechanism;

[0046] Figure 14 This is a schematic diagram of the emergency device and other components of the apparatus in accordance with the second embodiment of this application;

[0047] Figure 15 This is a schematic diagram of the emergency device (omitting the external support) of the second embodiment of this application in conjunction with other components of the device;

[0048] Figure 16 This is a front view of the emergency device and other components of the instrument after omitting the outer and inner supports, according to the second embodiment of this application.

[0049] Figure 17 This is a schematic diagram of the emergency device after omitting the external and internal supports, and its coordination with other components of the device, according to the second embodiment of this application.

[0050] Figure 18 This is a bottom view of the movable axis and other components of the instrument in accordance with the second embodiment of this application;

[0051] Figure 19 This is a schematic diagram showing the emergency device and other components of the device cooperating when the first gear and the second motor gear of the second embodiment of this application are not disengaged;

[0052] Figure 20 This is a schematic diagram showing the emergency device and other components of the device after the first gear and the second motor gear of the second embodiment of this application have disengaged;

[0053] Figure 21 This is a front view of the emergency device and other components of the apparatus in accordance with the third embodiment of this application;

[0054] Figure 22 This is a schematic diagram of the emergency device and other components of the apparatus in accordance with the third embodiment of this application;

[0055] Figure 23 This is a front view of the emergency device and other components of the instrument after the first gear of the third embodiment of this application has disengaged from the electric mechanism;

[0056] Figure 24 This is a schematic diagram of the operating mechanism according to the third embodiment of this application.

[0057] Figure label:

[0058] 1. External bracket 431 First threaded part

[0059] 12 Receiving groove 43 Movable shaft

[0060] 2. Operating Mechanism 432 Second Coordination Unit

[0061] 21 First operating lever 433 Third mating part

[0062] 211 Mating Hole 434 First Mating Part

[0063] 212 Mating groove 5 Electric mechanism

[0064] 22 Second operating lever 51 Motor

[0065] 23 Pivot 52 Second Gear

[0066] 3. Drive components 53. Motor gear set

[0067] 31 Second threaded part 531 First motor gear

[0068] 32 Mating Surface 532 Second Motor Gear

[0069] 4. Connecting Mechanism 5321 First Tooth

[0070] 41 First gear 5322 Second tooth

[0071] 411 Fourth mating part 6 Transmission mechanism

[0072] 412 Fifth mating part 61 Tooth surface

[0073] 413 Shaft Hole 7 Inner Support

[0074] 42 Elastic element 71 Limiting part Detailed Implementation

[0075] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”. Although the terms “upper,” “lower,” “between,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although “first” to “fifth,” etc., are used in this specification to denote certain features, they are only for indication of function and not as a limitation on the number or importance of specific features.

[0076] This application provides an emergency device for surgical instruments and a surgical instrument including the emergency device. The surgical instrument includes an instrument body and an actuating end located at the distal end of the instrument body. The instrument body includes a transmission mechanism that can be driven to move towards or away from the actuating end of the surgical instrument, a connecting mechanism connected to the transmission mechanism, and an electric mechanism connected to the connecting mechanism and driving the connecting mechanism to move the transmission mechanism. The connecting mechanism includes a first gear, and the connecting mechanism is disengaged from the electric mechanism by means of the first gear. The surgical instrument may be, for example, a surgical stapler or other types of surgical instruments.

[0077] The emergency device includes a movable shaft that is movably mounted in the first gear. When the movable shaft and the first gear are in a first engagement state, the first gear can rotate around the movable shaft. When the movable shaft and the first gear are in a second engagement state, the first gear is restricted from rotating around the movable shaft, and the rotation of the movable shaft can drive the first gear to rotate. The first gear can be driven to move by the movement of the movable shaft to disengage from the electric mechanism, wherein the direction of movement of the movable shaft is the same as the direction of movement of the first gear. Therefore, when the transmission mechanism cannot be reset by the electric mechanism after the device is fired, the first gear can be driven to disengage from the electric mechanism by the movable shaft, and the transmission mechanism can be reset by driving the first gear to rotate by the movable shaft, thereby realizing emergency manual reset of the transmission mechanism.

[0078] The structure of the emergency device and surgical instrument of various specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the various specific embodiments are not intended to limit the scope of protection of this application.

[0079] In a first embodiment of this application, the surgical instrument includes an instrument body and an actuator located at the distal end of the instrument body, and the emergency device is located on the instrument body. In this embodiment, a surgical stapler is used as an example of the surgical instrument, and the actuator is an end effector that performs suturing and cutting actions. Figures 1-13 The diagram illustrates the working structure of the emergency device and other components of the apparatus according to the first embodiment. These other components include, but are not limited to, the transmission mechanism 6, the connecting mechanism 4, and the electric mechanism 5.

[0080] like Figures 1-8As shown, the instrument body includes a transmission mechanism 6 that can be driven to move towards or away from the execution end of the surgical instrument, a connecting mechanism 4 connected to the transmission mechanism 6, and an electric mechanism 5 connected to the connecting mechanism 4 and driving the connecting mechanism 4 to move the transmission mechanism 6. The transmission mechanism 6 has a toothed surface 61 on its surface facing the connecting mechanism 4. The connecting mechanism 4 includes a first gear 41 that meshes with the toothed surface 61 of the transmission mechanism 6. The connecting mechanism 4 disengages from the electric mechanism 5 by disengaging the first gear 41. The electric mechanism 5 includes a motor 51 and a motor gear set, the motor gear set including a second gear 52 located at the output shaft of the motor 51. In the initial state, the first gear 41 and the second gear 52 are engaged, and the motor 51 can drive the transmission mechanism 6 to move towards the distal or proximal end via the first gear 41 and the second gear 52. When the first gear 41 disengages from the second gear 52, the connecting mechanism 4 disengages from the electric mechanism 5. The electric mechanism 5 cannot drive the movement of the transmission mechanism 6. The output shaft of the motor 51, the axial direction of the second gear 52, and the axial direction of the first gear 41 are all parallel to the first direction. In other embodiments, the connecting mechanism 4 may further include a plurality of first gears 41, and / or the motor gear set may include a plurality of second gears 52. One or more first gears 41 mesh with one or more second gears 52 to transmit power from the motor 51 to the transmission mechanism 6. After the previously meshed first gears 41 and second gears 52 disengage, the connecting mechanism 4 and the electric mechanism 5 disengage.

[0081] In this application, the distal side and proximal side are relative to the operator. The side closer to the operator is the proximal side, and the side farther from the operator, i.e., closer to the surgical position, is the distal side. The direction along the axis of the stapler is the axial direction, i.e., the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in Figure 1 From this perspective, the S1 direction is from the far end to the near end. Definition Figure 1 In the S2 direction, the longitudinal direction is defined as the height direction. Figure 1 In the S3 direction, the direction is transverse, i.e., the width direction. In this application, for a component, the inner and outer sides are relative to the center of the component; the side closer to the center is the inner side, and the side farther from the center is the outer side.

[0082] like Figures 1-8As shown, the emergency device includes an outer support 1, an inner support 7, and a movable shaft 43. The outer support 1 is sleeved outside the first gear 41 and the transmission mechanism 6. The inner support 7 is located inside the outer support 1. The movable shaft 43 is movably inserted into the shaft hole 413 of the first gear 41. The movable shaft 43 and the first gear 41 have two engagement states. When the movable shaft 43 and the first gear 41 are in a first relative position, the movable shaft 43 and the first gear 41 are in a first engagement state (…). Figure 6 In the second relative position, the first gear 41 can rotate around the movable shaft 43. When the movable shaft 43 and the first gear 41 are in a second engagement state, the movable shaft 43 and the first gear 41 are in a second engagement state. Figure 13 In this state, the first gear 41 is restricted to rotate around the movable shaft 43. Rotation of the movable shaft 43 drives the first gear 41 to rotate. Furthermore, when the movable shaft 43 moves along a first direction, it can cause the first gear 41 to move along the first direction and disengage from the electric mechanism 5. Specifically, the second gear 52 is at least partially located on one side of the first gear 41 along a second direction, which is opposite to the first direction. When the movable shaft 43 drives the first gear 41 to move along the first direction, the first gear 41 and the second gear 52 no longer mesh and disengage from the electric mechanism 5.

[0083] When the anastomosis device fails to reset the transmission mechanism 6 via the electric mechanism 5 after firing, it is achieved through two main steps: Step 1: The movable shaft 43 is driven to move along the first direction, while the first gear 41 remains stationary, causing the movable shaft 43 and the first gear 41 to change from the first relative position to the second relative position, thus transitioning them from the first engagement state to the second engagement state. Then, the movable shaft 43 continues to be driven to move along the first direction, causing the first gear 41 to move along the first direction and disengage from the electric mechanism 5 (e.g., ...). Figure 13 (as shown in the diagram); Step 2: The movable shaft 43 is driven to rotate, causing the first gear 41 in the second engagement state to rotate. The first gear 41 engages with the tooth surface 61 of the transmission mechanism 6, driving the transmission mechanism 6 to move towards the proximal end direction. In this embodiment, the first direction is... Figure 6 The upward direction S1 (parallel to) Figure 1 The direction of motion of the transmission mechanism 6 is perpendicular to the direction of motion of the transmission mechanism 6 (direction S1 or the direction opposite to S1).

[0084] Therefore, the movable shaft 43 is primarily driven in two modes of motion: in step one, it is driven to move linearly along a first direction, and in step two, it is driven to rotate. In this embodiment, the emergency device also includes an operating mechanism 2 and a driving component 3 for driving the movable shaft 43 to perform these two modes of motion. Figures 2-6 As shown, the operating mechanism 2 includes a first operating lever 21 and a second operating lever 22. The driving member 3 is disposed at the first end of the first operating lever 21, and the second end of the first operating lever 21 and the second operating lever 22 are connected by a pivot 23. The operating mechanism 2 has two states. When the operating mechanism 2 is not in use, it is operated as follows: Figure 2 and Figure 3 The second operating lever 22 is at least partially inserted into one side of the outer bracket 1 and stored in a manner that allows it to be stored in the outer bracket 1. Figure 4 The outer support 1 shows a receiving groove 12. When the operating mechanism 2 is needed, the driving member 3 located at the first operating lever 21 of the operating mechanism 2 engages with the top of the movable shaft 43, so that when the user operates the second operating lever 22 of the operating mechanism 2, the movement of the movable shaft 43 is driven sequentially through the transmission of the first operating lever 21 and the driving member 3. The inner support 7 is provided with a limiting part 71, which is sleeved on the top of the movable shaft 43 and located below the driving member 3, limiting the engagement position of the first operating lever 21 and the movable shaft 43. In this embodiment, the first end of the first operating lever 21 is provided with a mating hole 211, and the driving member 3 is at least partially embedded in the mating hole 211. The first operating lever 21 and the driving member 3 may be fixedly connected. Alternatively, the driving member 3 may be removed from the mating hole 211 when not in use. The outer surface of the driving component 3 mates with the inner surface of the mating hole 211 to form a non-rotatable connection. In this embodiment, both the outer surface of the driving component 3 and the inner surface of the mating hole 211 are polygonal surfaces. In other embodiments, the driving component 3 and the first operating lever 21 can be directly formed as an integral structure or fixedly connected by a fastener.

[0085] like Figures 6-12As shown, the movable shaft 43 includes a first threaded portion 431, a first mating portion 434, a second mating portion 432, and a third mating portion 433 arranged sequentially along the axial direction of the movable shaft 43. Both ends of the movable shaft 43 protrude beyond the two end faces of the first gear 41. The first threaded portion 431 is located at the first end of the movable shaft 43, and the third mating portion 433 is a stepped portion located at the second end of the movable shaft 43. The driving member 3 has a second threaded portion 31. In this embodiment, the first threaded portion 431 is an external thread, and the second threaded portion 31 is an internal thread. The outer diameter of the first mating portion 434 is equal to or slightly larger than the maximum outer diameter of the first threaded portion 431. The second threaded portion 31 and the first threaded portion 431 can form a threaded engagement. When the second threaded portion 31 engages with the first threaded portion 431, the rotation of the driving member 3 can drive the movable shaft 43 to move linearly in a first direction. When the movable shaft 43 moves to the point where the first mating part 434 engages with the second threaded part 31, the second threaded part 31 and the first mating part 434 form a non-rotatable connection, and the rotation of the driving member 3 can drive the movable shaft 43 to rotate in the same direction.

[0086] like Figure 11 and Figure 12 As shown, the first mating part 434 is the optical axis part of the movable shaft 43, and the outer surface of the second mating part 432 is provided with a first anti-rotation structure. The first gear 41 includes a fourth mating part 411 and a fifth mating part 412. The fourth mating part 411 is provided with a second anti-rotation structure. The fifth mating part 412 is the lower end face of the first gear 41. The first anti-rotation structure and the second anti-rotation structure are respectively adapted polygonal surfaces.

[0087] The outer diameter of the first mating part 434 is smaller than the minimum inner diameter of the fourth mating part 411. Therefore, when the movable shaft 43 and the first gear 41 are in the first mating state, the first mating part 434 engages with the fourth mating part 411 to allow the first gear 41 to rotate around the movable shaft 43. The outer diameter of the third mating part 433 is larger than the inner diameter of the shaft hole 413 of the first gear 41. When the movable shaft 43 is driven to move in the first direction, the third mating part 433 will not enter the interior of the first gear 41. The third mating part 433 abuts against and engages with the fifth mating part 412 to drive the first gear 41 to move in the first direction, so that the first gear 41 disengages from the electric mechanism 5. After the first gear 41 is disengaged from the electric mechanism 5, the movable shaft 43 and the first gear 41 are in the second engagement state. The second engagement part 432 engages with the fourth engagement part 411, and the first anti-rotation structure engages with the second anti-rotation structure to restrict the first gear 41 from rotating around the movable shaft 43. At this time, the movable shaft 43 can drive the first gear 41 to rotate in the same direction.

[0088] like Figure 11 and Figure 12 As shown, the emergency device further includes an elastic element 42, which is configured to apply a biasing force to the first gear 41 in a second direction, opposite to the first direction. In this embodiment, the elastic element 42 is a compression spring disposed above the first gear 41. In other alternative embodiments, the elastic element 42 may also be an elastic pad, elastic sheet, etc. disposed above the first gear 41, or a tension spring, etc. disposed below the first gear 41.

[0089] The following is combined Figure 6 and Figure 13 This section provides a detailed description of how the emergency device works.

[0090] In the initial state, before the stapler is fired, the first gear 41 simultaneously meshes with the second gear 52 and the rack of the transmission mechanism 6. The movable shaft 43 is in a first relative position with the first gear 41, and the first mating part 434 of the movable shaft 43 meshes with the fourth mating part 411 of the first gear 41. Therefore, the movable shaft 43 and the first gear 41 are in a first mating state. When the stapler is fired, the motor 51 is started, causing the motor 51 to drive the first gear 41 to rotate through the second gear 52, which in turn drives the transmission mechanism 6 to move towards the distal end, driving the distal end actuator to perform the cutting action. During this process, since the first gear 41 and the movable shaft 43 are in a relatively rotatable first mating state, the movable shaft 43 will not rotate.

[0091] After the stapler is fired, the status of the emergency device is as follows: Figure 6 As shown. The first gear 41 meshes with the tooth surface 61 at the proximal position of the transmission mechanism 6. When the transmission mechanism 6 needs to be manually reset, firstly, the second threaded portion 31 of the driving member 3 is engaged with the first threaded portion 431 at the top of the movable shaft 43. The second operating lever 22 is rotated, and the driving member 3 is driven to rotate through the first operating lever 21, thereby driving the movable shaft 43 to move along the first direction. The movable shaft 43 and the first gear 41 enter the second relative position. The second mating portion 432 of the movable shaft 43 enters the fourth mating portion 411 of the first gear 41 and forms a non-rotatable engagement with the first gear 41. The movable shaft 43 and the first gear 41 enter the second engagement state. Furthermore, the third mating part 433 of the movable shaft 43 abuts against the fifth mating part 413 of the first gear 41, and the movable shaft 43 continues to move along the first direction. The movable shaft 43 drives the first gear 41 to move along the first direction through the cooperation of the third mating part 433 and the fifth mating part 413. The first gear 41 disengages from the second gear 52, thereby disengaging the connecting mechanism 4 from the motor 51 mechanism, and compresses the elastic element 42 to cause elastic deformation, and the emergency device enters. Figure 13 The state shown is as follows. The elastic element 42 can assist the movable shaft 43 in better aligning with the first gear 41, making the process of the second mating part 432 entering the fourth mating part 411 smoother.

[0092] After the connecting mechanism 4 disengages from the motor 51, the second threaded portion 31 engages with the first mating portion 434 of the movable shaft 43. Therefore, the length of the first threaded portion 431 is equal to the travel distance of the movable shaft 43 from its initial position to the position where the first gear 41 disengages from the second gear 52. Continuing to rotate the second operating lever 22 drives the second threaded portion 31 to rotate via the first operating lever 21. The second threaded portion 31 then drives the first gear 41 to rotate in the same direction via the movable shaft 43. The first gear 41 drives the transmission mechanism 6, which meshes with it, causing the transmission mechanism 6 to move along the axial direction of the anastomosis device towards the proximal end, thereby resetting the transmission mechanism 6. This emergency device has a simple structure and is easy to operate, effectively enabling manual resetting of the transmission mechanism 6 when the electric mechanism 5 fails to reset.

[0093] Figures 14-20 The diagram illustrates the cooperation structure between the emergency device and other components of the apparatus according to the second embodiment of this application. The difference between this embodiment and the first embodiment is that in the first embodiment, the operating mechanism 2 drives the movable shaft 43 to move from the top of the outer support 1, while in the second embodiment, the operating mechanism 2 drives the movable shaft 43 to move from one side of the outer support 1. Figure 15As shown, the inner bracket 7 serves to support and fix the first gear 41 and the movable shaft 43. The movable shaft 43 passes through the inner bracket 7, and the first threaded portion 431 protrudes from the inner bracket 7 to cooperate with the drive member 3 of the operating mechanism 2. Figures 16-18 As shown, in this embodiment, the motor gear set 53 includes a first motor gear 531 and a second motor gear 532, and the axes of the first motor gear 531 and the second motor gear 532 are arranged intersecting. Figure 17 As shown, the axis of the first motor gear 531 is shown as X1, which is the same as the axis of the output shaft of the motor 51. The axis of the second motor gear 532 is shown as X2. From Figure 17 As can be seen, X1 and X2 are arranged in an intersecting manner. The first motor gear 531 is mounted on the output shaft of the motor 51, and the output shaft of the motor 51 forms an angle with the first direction. The second motor gear 532 includes a first tooth portion 5321 and a second tooth portion 5322. In the initial state, the first tooth portion 5321 meshes with the first motor gear 531, and the second tooth portion 5322 meshes with the first gear 41. When the motor 51 is started, the motor 51 drives the first gear 41 to rotate sequentially through the first motor gear 531 and the second motor gear 532.

[0094] like Figures 18-20 As shown, the first direction D2 (parallel to) Figure 18 The direction of motion of the transmission mechanism 6 is perpendicular to the direction of motion of the transmission mechanism 6 (S3 direction). Figure 1 (In the S1 direction). In the initial state, the second tooth 5322 of the second motor gear 532 meshes with the first gear 41. Figure 18 In this state, by rotating the second operating lever 22, the movable shaft 43 can be driven to move along the first direction D2. This drives the first gear 41 to move along the first direction, causing the first gear 41 to disengage from the second tooth 5322 of the second motor gear 532. Figure 19 The outer diameter of the first tooth 5321 is smaller than the outer diameter of the second tooth 5322, therefore, the first tooth 5321 will not interfere with the first gear 41. At this time, the movable shaft 43 and the first gear 41 form a second engagement state, and the transmission mechanism 6 can be reset by driving the movable shaft 43 and the first gear 41 to rotate through the driving member 3.

[0095] Figures 21-24The diagram illustrates the structure of the emergency device and other components of the apparatus according to a third embodiment of this application. This embodiment differs from the first embodiment in that the driving member 3 is detachably connected to the first end of the first operating lever 21. The first end of the first operating lever 21 has a mating groove 212, and the driving member 3 is at least partially embedded in the mating groove 212. Figure 24 As shown, the outer surface of the driving member 3 serves as a mating surface 32, which mates with the inner surface of the mating groove 212, forming a non-rotatable connection. In this embodiment, both the mating surface 32 of the driving member 3 and the inner surface of the mating groove 212 are polygonal surfaces. When the operating mechanism 2 is not in use and is stored away, the driving member 3 can remain at the top of the movable shaft 43, keeping the second threaded portion 31 engaged with the first threaded portion 431. In the initial state, the second gear 52 meshes with the first gear 41. Figure 22 In this state, by rotating the second operating lever 22, the movable shaft 43 can be driven to move along the first direction D3. This drives the first gear 41 to move along the first direction, causing the first gear 41 to disengage from the second gear 52. Figure 23 The state is as follows. At this time, the movable shaft 43 and the first gear 41 form a second engagement state. The transmission mechanism 6 can be reset by driving the movable shaft 43 and the first gear 41 to rotate through the driving member 3.

[0096] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. An emergency device for a surgical instrument, the surgical instrument comprising a transmission mechanism (6) capable of being driven to move toward or away from the actuating end of the surgical instrument, a connecting mechanism (4) connected to the transmission mechanism (6), and an electric mechanism (5) connected to the connecting mechanism (4) and driving the connecting mechanism (4) to move the transmission mechanism (6), wherein, The connecting mechanism (4) includes a first gear (41), and the connecting mechanism (4) is disengaged from the electric mechanism (5) by means of the first gear (41), characterized in that the emergency device includes: A movable shaft (43) is movably inserted into the first gear (41). When the movable shaft (43) and the first gear (41) are in a first engagement state, the first gear (41) can rotate around the movable shaft (43). When the movable shaft (43) and the first gear (41) are in a second engagement state, the first gear (41) is restricted from rotating around the movable shaft (43), and the first gear (41) can be driven to move by the movement of the movable shaft (43) to disengage from the electric mechanism (5). The direction of movement of the movable shaft (43) is consistent with the direction of movement of the first gear (41). The movable shaft (43) includes a third mating part (433), and the first gear (41) includes a fifth mating part (412); the third mating part (433) is located at the second end of the movable shaft (43) and protrudes beyond the side end face of the first gear (41) where the fifth mating part (412) is located; the outer diameter of the third mating part (433) is larger than the inner diameter of the shaft hole (413) of the first gear (41); When the movable shaft (43) is driven to move in a straight line, the third mating part (433) and the fifth mating part (412) cooperate to drive the first gear (41) to move, so that the first gear (41) disengages from the electric mechanism (5).

2. The emergency device according to claim 1, characterized in that: When the movable shaft (43) and the first gear (41) are in the first relative position, the movable shaft (43) and the first gear (41) are in the first engagement state; When the movable shaft (43) and the first gear (41) are in the second relative position, the movable shaft (43) and the first gear (41) are in the second engagement state; In this process, the movable shaft (43) moves along a first direction, thereby changing the movable shaft (43) and the first gear (41) from the first relative position to the second relative position. Furthermore, the first direction is perpendicular to the direction in which the transmission mechanism (6) moves toward or away from the execution end of the surgical instrument.

3. The emergency device according to claim 2, characterized in that: The movable shaft (43) further includes a first mating part (434) and a second mating part (432), and the first gear (41) further includes a fourth mating part (411). When the movable shaft (43) and the first gear (41) are in the first engagement state, the first engagement part (434) engages with the fourth engagement part (411) to allow the first gear (41) to rotate around the movable shaft (43); When the movable shaft (43) and the first gear (41) are in the second engagement state, the second engagement part (432) engages with the fourth engagement part (411) to restrict the first gear (41) from rotating around the movable shaft (43).

4. The emergency device according to claim 3, characterized in that, The first gear (41) includes a shaft hole (413), and the movable shaft (43) passes through the shaft hole (413) of the first gear (41). The movable shaft (43) is provided with a first threaded portion (431). The emergency device also includes a drive component (3), which has a second threaded portion (31) that mates with the first threaded portion (431). When the drive component (3) rotates, it drives the movable shaft (43) to move.

5. The emergency device according to claim 4, characterized in that, The first threaded portion (431) is located at the first end of the movable shaft (43) and protrudes beyond one side end face of the first gear (41).

6. The emergency device according to claim 5, characterized in that, The first mating part (434) of the movable shaft (43) is located between the first threaded part (431) and the second mating part (432), and the outer diameter of the first mating part (434) is less than or equal to the inner diameter of the shaft hole (413) of the first gear (41).

7. The emergency device according to claim 6, characterized in that, After the first gear (41) is disengaged from the electric mechanism (5), when the movable shaft (43) is driven to rotate by the rotation of the drive member (3), the first gear (41) is driven to rotate by the second mating part (432) and the fourth mating part (411).

8. The emergency device according to claim 4, characterized in that, It also includes an elastic element (42) configured to apply a biasing force to the first gear (41) in a second direction opposite to the first direction.

9. The emergency device according to claim 4, characterized in that, The first threaded portion (431) is an external thread distributed on the outer surface of the movable shaft (43), the driving member (3) is at least partially sleeved on the outside of the first threaded portion (431), and the second threaded portion (31) is an internal thread provided on the inside of the driving member (3).

10. The emergency device according to claim 9, characterized in that, It also includes a first operating lever (21), the first end of which is provided with the driving element (3).

11. The emergency device according to claim 10, characterized in that, The first end of the first operating lever (21) is provided with a mating hole (211) or a mating groove (212), and the driving member (3) is at least partially embedded in the mating hole (211) or the mating groove (212).

12. The emergency device according to claim 11, characterized in that, The outer surface of the drive member (3) engages with the inner surface of the mating hole (211) or the mating groove (212) to form a connection that cannot be rotated relative to each other.

13. The emergency device according to claim 11, characterized in that, The drive unit (3) is detachably connected to the first end of the first operating lever (21).

14. The emergency device according to claim 10, characterized in that, It also includes a second operating lever (22), which is connected to the second end of the first operating lever (21).

15. The emergency device according to claim 14, characterized in that, It also includes an outer bracket (1), wherein the first gear (41) and the movable shaft (43) are at least partially located inside the outer bracket (1); The outer support (1) has a receiving groove (12) on one side, and the second operating rod (22) is at least partially located in the receiving groove (12).

16. The emergency device according to claim 4, characterized in that, The electric mechanism (5) includes a motor (51) and a motor gear set (53). The output shaft of the motor (51) can drive the motor gear set (53) to rotate. The motor gear set (53) is at least partially located on one side of the first gear (41) along a second direction, which is opposite to the first direction. The motor gear set (53) includes a second gear (52). When the electric mechanism (5) is connected to the connecting mechanism (4), the first gear (41) meshes with the second gear (52), and the output shaft of the motor (51) is parallel to the first direction.

17. The emergency device according to claim 16, characterized in that, The motor gear set (53) includes a first motor gear (531) and a second motor gear (532), and the axes of the first motor gear (531) and the second motor gear (532) are intersected. The output shaft of the motor (51) is parallel to the first direction, or the output shaft of the motor (51) has an angle with the first direction.

18. A surgical instrument, characterized in that, The emergency device includes any one of claims 1 to 17.

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