Emergency equipment and surgical instruments

Abstract

The present disclosure provides an emergency device and surgical instrument. The surgical instrument includes a transmission mechanism, a coupling mechanism connected to the transmission mechanism, and an electric mechanism. The coupling mechanism includes a first gear, and the coupling mechanism can be disengaged from the electric mechanism by disengaging the first gear from the electric mechanism. The emergency device includes a movable shaft movably inserted into the first gear, and when the movable shaft and the first gear are in a first engagement state, the first gear can rotate about the movable shaft, and when the movable shaft and the first gear are in a second engagement state, the first gear cannot rotate about the movable shaft, and the first gear can move and disengage from the electric mechanism by movement of the movable shaft, the direction of movement of the movable shaft being the same as the direction of movement of the first gear. The present disclosure enables manual resetting of the transmission mechanism after the anastomosis instrument is triggered, facilitating operation by the surgeon in an emergency and ensuring the smooth progress of the surgery.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular, to emergency devices and surgical instruments.

Background Art

[0002] In the prior art, some surgical instruments need to drive the transmission shaft to move to the distal end by an operator operating the trigger mechanism at the proximal end during use, so as to perform a predetermined surgical operation on the working mechanism at the distal end. Taking a surgical stapler as an example, a conventional surgical stapler includes a stapler body, a trigger mechanism (for example, a trigger handle) movably connected to the stapler body, and an end effector attached to the body. The stapler body includes a drive assembly. The end effector includes an anvil and a staple cartridge provided opposite to each other. During the operation, the tissue is placed between the anvil and the staple cartridge, the distance between the anvil and the staple cartridge is adjusted to gradually clamp the tissue, and then the trigger mechanism is operated to drive the drive assembly to move to the distal end, form staples on the anvil, and complete the anastomosis of the tissue.

[0003] During use, an operator usually needs to apply a large force to the trigger mechanism to complete the operation, which is very inconvenient to use. For this reason, a motor-driven surgical instrument has been newly developed. If an operator activates the motor and rotates the motor output shaft in a predetermined direction, the motor can drive the transmission mechanism to move to the distal end. After the operation is completed, the motor output shaft can be rotated in the reverse direction, and the transmission mechanism can be driven to move to the proximal end by an electric return function to reset the entire device. However, when the motor and related devices or electronic components fail, the electric return function fails, and the device cannot be reset to open the jaws of the end effector, so the operation cannot proceed smoothly.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the limitations of the prior art, the purpose of this disclosure is to provide an emergency device and surgical instrument that enables manual resetting of the transmission mechanism when it is not possible to reset the transmission mechanism by an electric reset mechanism after the anastomosis device has been triggered. [Means for solving the problem]

[0005] Embodiments of the present disclosure provide an emergency device for use in a surgical instrument, the surgical instrument including a transmission mechanism that is movable toward or away from the working end of the surgical instrument when driven, a coupling mechanism connected to the transmission mechanism, and an electric mechanism connected to the coupling mechanism and driving the coupling mechanism to move the transmission mechanism. The coupling mechanism includes a first gear, and the coupling mechanism detaches from the electric mechanism by disengaging the first gear from the electric mechanism. The emergency device includes a movable shaft movably inserted into the first gear, the first gear being rotatable around the movable shaft when the movable shaft and the first gear are in a first engagement state, the first gear being restricted from rotating around the movable shaft when the movable shaft and the first gear are in a second engagement state, and the first gear moving with the movement of the movable shaft to detach from the electric mechanism, wherein the direction of motion of the movable shaft coincides with the direction of motion of the first gear.

[0006] 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 engaged state, and when the movable shaft and the first gear are in a second relative position, the movable shaft and the first gear are in the second engaged state. As the movable shaft moves in a first direction, the movable shaft and the first gear move from the first relative position to the second relative position, the first direction being perpendicular to the direction in which the transmission mechanism approaches or moves away from the working end of the surgical instrument.

[0007] In some embodiments, the movable shaft includes a first engaging portion, a second engaging portion, and a third engaging portion, and the first gear includes a fourth engaging portion and a fifth engaging portion. When the movable shaft and the first gear are in the first engaged state, the first engaging portion engages with the fourth engaging portion, allowing the first gear to rotate around the movable shaft. When the movable shaft and the first gear are in the second engaged state, the second engaging portion engages with the fourth engaging portion, restricting the first gear from rotating around the movable shaft. When the movable shaft is driven and moves, the engagement of the third and fifth engaging portions causes the first gear to move, and the first gear disengages from the electric mechanism.

[0008] In some embodiments, the first gear includes a shaft hole, the movable shaft is inserted into the shaft hole of the first gear, and the movable shaft is provided with a first threaded portion. The emergency device further includes a drive member, the drive member is provided with a second threaded portion that engages with the first threaded portion, and the drive member drives the movable shaft to move when rotated.

[0009] In some embodiments, both ends of the movable shaft protrude from the side end faces of the first gear, the first threaded portion is provided at the first end of the movable shaft, the third engaging portion is provided at the second end of the movable shaft, and the outer diameter of the third engaging portion is larger than the inner diameter of the shaft hole of the first gear.

[0010] In some embodiments, the first engaging portion of the movable shaft is located between the first threaded portion and the second engaging portion, and the outer diameter of the first engaging portion is less than or equal to the inner diameter of the shaft hole of the first gear.

[0011] In some embodiments, after the first gear has disengaged from the electric mechanism, if the movable shaft is rotationally driven by the rotation of the drive member, the engagement between the second engagement portion and the fourth engagement portion drives the first gear to rotation.

[0012] In some embodiments, the emergency device further includes an elastic member configured to impart a biasing force along a second direction to the first gear, the second direction being opposite to the first direction.

[0013] In some embodiments, the first threaded portion is a male thread provided on the outer surface of the movable shaft, the drive member is fitted to the outside of the first threaded portion at least in part, and the second threaded portion is a female thread provided on the inside of the drive member.

[0014] In some embodiments, the emergency device further includes a first operating lever, the first end of which is provided with the drive member.

[0015] In some embodiments, the first end of the first operating lever is provided with an engagement hole or engagement groove, and at least a portion of the drive member is fitted into the engagement hole or engagement groove.

[0016] In some embodiments, the outer surface of the drive member engages with the inner surface of the engagement hole or engagement groove to form a connection that is not rotatable relative to it.

[0017] In some embodiments, the drive member is detachably connected to the first end of the first operating lever.

[0018] In some embodiments, the emergency device further includes a second operating lever, the second operating lever being connected to a second end of the first operating lever.

[0019] In some embodiments, the emergency device further includes an outer holder, the first gear and the movable shaft being at least partially located inside the outer holder, a housing groove provided on one side of the outer holder, and the second operating lever being at least partially configurable within the housing groove.

[0020] In some embodiments, the electric mechanism includes a motor and a motor gear train, the output shaft of the motor is capable of rotationally driving the motor gear train, at least a portion of the motor gear train is located on one side of the first gear in a second direction, the second direction being opposite to the first direction, the motor gear train includes a second gear, and when the electric mechanism is connected to the coupling mechanism, the first gear and the second gear mesh together, and the output shaft of the motor is parallel to the first direction.

[0021] In some embodiments, the motor gear train includes a first motor gear and a second motor gear, the first motor gear and the second motor gear are arranged with their axes intersecting, and the output shaft of the motor is parallel to the first direction or has an angle between it and the first direction.

[0022] Embodiments of this disclosure further provide surgical instruments including the emergency device described above. [Effects of the Invention]

[0023] The emergency devices and surgical instruments relating to this disclosure have the following advantages.

[0024] According to this disclosure, if the transmission mechanism cannot be reset by the electric mechanism after the device is triggered, the first gear can be driven by the movable shaft to detach it from the electric mechanism, and the transmission mechanism can be reset by rotating the first gear with the movable shaft. This enables manual resetting of the transmission mechanism in emergencies, facilitating emergency operation by physicians and ensuring the smooth progress of surgery.

[0025] In addition, a drive member is provided at the first end of the first operation lever, and the drive member is provided with a second threaded portion that engages with the first threaded portion of the movable shaft. Therefore, the drive member drives the movable shaft to move when rotating. As a result, in the process of a doctor operating the emergency device, the first operation lever is always connected to the movable shaft without falling off, and the manual reset of the transmission mechanism in an emergency can be smoothly realized, avoiding the situation where the first operation lever and the movable shaft fall off and the manual reset of the transmission mechanism in an emergency cannot be smoothly realized, and further avoiding the doctor being more nervous and the surgical effect being affected in an emergency.

Brief Description of the Drawings

[0026] Other configurations, objectives, and advantages of the present disclosure will become clearer by explaining exemplary embodiments in detail while referring to the following drawings. [Figure 1] It is a schematic diagram of the emergency device according to the first embodiment of the present disclosure engaged with other parts of the device. [Figure 2] It is a schematic diagram of the emergency device according to the first embodiment of the present disclosure engaged with other parts of the device. [Figure 3] It is a schematic diagram of the emergency device according to the first embodiment of the present disclosure engaged with other parts of the device. [Figure 4] It is a schematic structural diagram of the outer holder according to the first embodiment of the present disclosure. [Figure 5] It is a schematic diagram of the emergency device according to the first embodiment of the present disclosure without an outer holder engaged with other parts of the device. [Figure 6] It is a schematic diagram of the emergency device according to the first embodiment of the present disclosure without an outer holder and an inner holder engaged with other parts of the device. [Figure 7] It is a front view of the emergency device according to the first embodiment of the present disclosure without an outer holder and an inner holder engaged with other parts of the device. [Figure 8] It is a schematic diagram of the movable shaft according to the first embodiment of the present disclosure engaged with other parts of the device. [Figure 9] It is a schematic structural diagram of the operating mechanism according to the first embodiment of the present disclosure engaged with the drive member. [Figure 10] This is a schematic diagram of a structure in which a movable shaft engages with a first gear according to the first embodiment of the present disclosure. [Figure 11] This is a schematic diagram showing the movable shaft detached from the first gear according to the first embodiment of the present disclosure. [Figure 12] This is a schematic diagram showing the movable shaft detached from the first gear according to the first embodiment of the present disclosure. [Figure 13] This is a schematic diagram illustrating the engagement of the emergency device with other components of the equipment when the first gear detaches from the electric mechanism, according to the first embodiment of the present disclosure. [Figure 14] This is a schematic diagram illustrating an emergency device in a second embodiment of the present disclosure, in which the emergency device is engaged with other components of the equipment. [Figure 15] This is a schematic diagram showing an emergency device according to a second embodiment of the present disclosure, in which the external holder is omitted and the device is engaged with other parts of the equipment. [Figure 16] This is a front view showing an emergency device according to a second embodiment of the present invention, in which the outer holder and inner holder are omitted, and which is engaged with other parts of the equipment. [Figure 17] This is a schematic diagram showing an emergency device according to a second embodiment of the present disclosure, in which the outer holder and inner holder are omitted, and which engages with other parts of the equipment. [Figure 18] This is a bottom view of a second embodiment of the present disclosure, showing the movable shaft engaged with other parts of the device. [Figure 19] This is a schematic diagram illustrating the engagement of the emergency device with other components of the equipment when the first gear is not detached from the second motor gear, according to a second embodiment of the present disclosure. [Figure 20] This is a schematic diagram illustrating the engagement of the emergency device with other components of the equipment when the first gear detaches from the second motor gear, according to a second embodiment of the present disclosure. [Figure 21] This is a front view of a third embodiment of the present disclosure, showing the emergency device engaged with other components of the equipment. [Figure 22] This is a schematic diagram illustrating an emergency device according to a third embodiment of the present disclosure, in which the emergency device is engaged with other components of the equipment. [Figure 23] This is a front view of the third embodiment of the present disclosure, showing the emergency device engaged with other parts of the equipment when the first gear detaches from the electric mechanism. [Figure 24] This is a schematic diagram of the structure of the operating mechanism according to the third embodiment of this disclosure. [Modes for carrying out the invention]

[0027] The embodiments will be described in more detail below with reference to the drawings. The embodiments can be implemented in various forms and are not limited to those described herein. These embodiments are provided to fully convey the technical concept of the embodiments to those skilled in the art, in order to make this disclosure complete and comprehensive. In the drawings, identical or similar components are indicated by the same reference numerals, and redundant descriptions are omitted. In this specification, "or" and "or" may mean "and" or "or". In this specification, terms such as "up," "down," and "between" are used for convenience to describe different exemplary configurations and elements of this disclosure, for example, based on exemplary directions shown in the drawings. Nothing described herein requires a specific three-dimensional orientation of a structure to fall within the scope of this disclosure. In this specification, "first" to "fifth," etc., are used to indicate certain features and are not limitations on the number and importance of specific configurations.

[0028] This disclosure provides an emergency device for use in surgical instruments and a surgical instrument including said emergency device. The surgical instrument includes an instrument body and a working end located at the distal end of the instrument body. The instrument body includes a transmission mechanism that is movable toward or away from the working end of the surgical instrument when driven, a coupling mechanism connected to the transmission mechanism, and an electric mechanism connected to the coupling mechanism and driving the coupling mechanism to move the transmission mechanism, wherein the coupling mechanism includes a first gear, and the coupling mechanism detaches from the electric mechanism by detaching the first gear from the electric mechanism. The surgical instrument may be, for example, a surgical anastomosis device or other surgical instruments.

[0029] The emergency device includes a movable shaft movably inserted into the first gear. When the movable shaft and the first gear are in a first engagement state, the first gear is rotatable 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 rotate-drive the first gear. The first gear moves in accordance with the movement of the movable shaft and can be disengaged from the electric mechanism. Here, the direction of motion of the movable shaft coincides with the direction of motion of the first gear. Therefore, if the transmission mechanism cannot be reset by the electric mechanism after the device is triggered, the first gear can be driven by the movable shaft to disengage it from the electric mechanism, and the transmission mechanism can be reset by rotating the first gear by the movable shaft. This enables manual reset of the transmission mechanism in an emergency.

[0030] The structures of emergency devices and surgical instruments relating to each embodiment of this disclosure will be described in detail below with reference to the drawings, but each embodiment is not a limitation on the scope of protection of this disclosure.

[0031] In the first embodiment of this disclosure, the surgical instrument includes a main body and a working end located at the distal end of the main body, and the emergency device is provided on the main body. In this embodiment, a surgical anastomosis device is described as an example, and the working end is an end effector that performs suturing and cutting operations. Figures 1 to 13 show the structure in which the emergency device according to the first embodiment engages with other parts of the instrument. Other parts of the instrument include, but are not limited to, a transmission mechanism 6, a coupling mechanism 4, and an electric mechanism 5.

[0032] As shown in Figures 1 to 8, the main body of the device includes a transmission mechanism 6 that can move closer to or away from the working end of the surgical instrument when driven, a coupling mechanism 4 connected to the transmission mechanism 6, and an electric mechanism 5. The electric mechanism is connected to the coupling mechanism 4 and is configured to drive the coupling mechanism 4 to move, thereby moving the transmission mechanism 6. The transmission mechanism 6 has a toothed surface 61 on the side facing the coupling mechanism 4. The coupling mechanism 4 includes a first gear 41, and the toothed surface 61 of the transmission mechanism 6 meshes with the first gear 41. The coupling mechanism 4 detaches from the electric mechanism 5 when the first gear 41 detaches from the electric mechanism 5. The electric mechanism 5 includes a motor 51 and a motor gear train, the motor gear train includes a second gear 52, and the second gear 52 is provided on the output shaft of the motor 51. In the initial state, the first gear 41 and the second gear 52 mesh, and the motor 51 can drive the transmission mechanism 6 to move toward the distal or proximal end via the second gear 52 and the first gear 41. When the first gear 41 disengages from the second gear 52, the engagement between the coupling mechanism 4 and the electric motor 5 is released, and the electric motor 5 cannot drive the transmission mechanism 6 to move. 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 coupling mechanism 4 may include a plurality of first gears 41 and / or 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 meshed first gears 41 and second gears 52 disengage, the engagement between the coupling mechanism 4 and the electric motor 5 is released.

[0033] In this disclosure, the distal and proximal sides are defined relative to the operator, with the side closer to the operator being the proximal side and the side further from the operator, i.e., closer to the surgical site, being the distal end. The axial direction is the direction along the axis of the anastomotic device, i.e., the direction from the distal end to the proximal end of the anastomotic device, or the direction from the proximal side to the distal end of the anastomotic device. For example, in the viewing angle of Figure 1, direction S1 is the direction from the distal end to the proximal end, and the transmission mechanism 6 can move in the direction of S1 or the opposite direction of S1. Direction S2 in Figure 1 is defined as the vertical direction, i.e., the height direction. Direction S3 in Figure 1 is defined as the horizontal direction, i.e., the width direction. In this disclosure, in a single component, the inner and outer sides are defined relative to the center of the component, with the side closer to the center being the inner side and the side further from the center being the outer side.

[0034] As shown in Figures 1 to 8, the emergency device includes an outer holder 1, an inner holder 7, and a movable shaft 43. The outer holder 1 is fitted externally to the first gear 41 and the transmission mechanism 6. The inner holder 7 is located inside the outer holder 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, they are in a first engagement state (state in Figure 6), and 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 relative position, they are in a second engagement state (state in Figure 13), and the first gear 41 is restricted and cannot rotate around the movable shaft 43. The rotation of the movable shaft 43 can rotate the first gear 41. Furthermore, when the movable shaft 43 moves in the first direction, the first gear 41 can be moved in the first direction and disengaged from the electric mechanism 5. Specifically, at least a portion of the second gear 52 is located on one side of the first gear 41 in the second direction, and the second direction is opposite to the first direction. When the movable shaft 43 moves the first gear 41 in the first direction, the first gear 41 disengages from the second gear 52 and disengages from the electric mechanism 5.

[0035] If the transmission mechanism 6 cannot be reset by the electric mechanism 5 after the anastomosis device is triggered, a manual reset of the transmission mechanism 6 is mainly achieved in the following two steps. In step 1, the movable shaft 43 is driven to move in the first direction while the first gear 41 does not move, thus moving the movable shaft 43 and the first gear 41 from the first relative position to the second relative position, thereby moving the movable shaft 43 and the first gear 41 from the first engaged state to the second engaged state. Then, the movable shaft 43 is driven to continue moving in the first direction, moving the first gear 41 in the first direction and disengaging it from the electric mechanism 5 (the state shown in Figure 13). In step 2, the movable shaft 43 is rotationally driven to rotate the first gear 41 in the second engaged state, and the first gear 41 engages with the tooth surface 61 of the transmission mechanism 6 and drives the transmission mechanism 6 to move in the proximal direction. In this embodiment, the first direction is the upward direction D1 in Figure 6 (parallel to the direction S2 in Figure 1) and is perpendicular to the direction of motion of the transmission mechanism 6 (direction S1 or the opposite direction of S1).

[0036] Accordingly, the movable shaft 43 has two motion modes: a motion mode in which it is driven to move linearly in a first direction in step 1, and a motion mode in which it is driven to rotate in step 2. In this embodiment, the emergency device further includes an operating mechanism 2 and a drive member 3 that drive the movable shaft 43 to perform these two motion modes. As shown in Figures 2 to 6, the operating mechanism 2 includes a first operating lever 21 and a second operating lever 22, the drive member 3 is provided at the first end of the first operating lever 21, and the second end of the first operating lever 21 is connected to the second operating lever 22 via a pivot 23. The operating mechanism 2 has two states. When the operating mechanism 2 is not needed, it is housed on one side of the outer holder 1 as shown in Figures 2 and 3, and at least a portion of the second operating lever 22 enters the housing groove 12 of the outer holder 1 as shown in Figure 4. When it is necessary to use the operating mechanism 2, the drive member 3 provided on the first operating lever 21 of the operating mechanism 2 is engaged with the top of the movable shaft 43. When the user operates the second operating lever 22 of the operating mechanism 2, the movement of the movable shaft 43 is driven by transmission sequentially through the first operating lever 21 and the drive member 3. The internal holder 7 is provided with a position limiting portion 71, which is fitted onto the tip of the movable shaft 43 and located below the drive member 3, limiting the engagement position between 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 an engagement hole 211, and at least a portion of the drive member 3 is fitted into the engagement hole 211. The first operating lever 21 may be fixedly connected to the drive member 3. Alternatively, the drive member 3 may be removed from the engagement hole 211 when not in use. The outer surface of the drive member 3 engages with the inner surface of the engagement hole 211 to form a connection that is not rotatable relative to it, and in this embodiment, both the outer surface of the drive member 3 and the inner surface of the engagement hole 211 are polygonal surfaces. In other embodiments, the drive member 3 and the first operating lever 21 may be integrally molded or fixedly connected via a fixing member.

[0037] As shown in Figures 6 to 12, the movable shaft 43 includes a first threaded portion 431, a first engaging portion 434, a second engaging portion 432, and a third engaging portion 433, which are arranged in order along the axial direction of the movable shaft 43. Both ends of the movable shaft 43 protrude from the end faces on both sides of the first gear 41, the first threaded portion 431 is provided at the first end of the movable shaft 43, and the third engaging portion 433 is a stepped portion provided at the second end of the movable shaft 43. The drive member 3 is provided with a second threaded portion 31. In this embodiment, the first threaded portion 431 is a male thread, and the second threaded portion 31 is a female thread. The outer diameter of the first engaging portion 434 is equal to or slightly larger than the maximum outer diameter of the first threaded portion 431. The second threaded portion 31 can be screwed into the first threaded portion 431. When the second threaded portion 31 engages with the first threaded portion 431, the rotation of the drive member 3 can drive the movable shaft 43 to move linearly in the first direction. When the movable shaft 43 moves until the first engaging portion 434 engages with the second threaded portion 31, the second threaded portion 31 forms a connection with the first engaging portion 434 that is not rotatable relative to it, and the rotation of the drive member 3 can drive the movable shaft 43 to rotate in the same direction.

[0038] As shown in Figures 11 and 12, the first engaging portion 434 is the bare shaft portion of the movable shaft 43, and a first rotation-stopping structure is provided on the outer surface of the second engaging portion 432. The first gear 41 includes a fourth engaging portion 411 and a fifth engaging portion 412. The fourth engaging portion 411 is provided with a second rotation-stopping structure. The fifth engaging portion 412 is the lower end surface of the first gear 41. The first rotation-stopping structure and the second rotation-stopping structure are each polygonal surfaces that are compatible with each other.

[0039] The outer diameter of the first engaging portion 434 is smaller than the minimum inner diameter of the fourth engaging portion 411. Therefore, when the movable shaft 43 and the first gear 41 are in the first engaged state, the first engaging portion 434 engages with the fourth engaging portion 411, allowing the first gear 41 to rotate around the movable shaft 43. The outer diameter of the third engaging portion 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 engaging portion 433 does not enter the interior of the first gear 41, but instead abuts against and engages with the fifth engaging portion 412, driving the first gear 41 to move in the first direction and disengaging the first gear 41 from the electric mechanism 5. After the first gear 41 disengages from the electric mechanism 5, the movable shaft 43 and the first gear 41 are in the second engagement state, the second engagement portion 432 engages with the fourth engagement portion 411, and the first rotation-stopping structure engages with the second rotation-stopping structure, so that the first gear 41 is restricted and cannot rotate around the movable shaft 43. In this case, the movable shaft 43 can rotate the first gear 41 in the same direction.

[0040] As shown in Figures 11 and 12, the emergency device further includes an elastic member 42 configured to apply a biasing force to the first gear 41 along a second direction, the second direction being opposite to the first direction. In this embodiment, the elastic member 42 is a compression spring located above the first gear 41. In other alternative embodiments, the elastic member 42 may be an elastic mat, elastic plate located above the first gear 41, or a tension spring located below the first gear 41.

[0041] The operation process of the emergency device will be explained in detail below with reference to Figures 6 and 13.

[0042] In the initial state, when the anastomotic device is not triggered, the first gear 41 simultaneously meshes with the second gear 52 and the rack of the transmission mechanism 6. The movable shaft 43 and the first gear 41 are in a first relative position, and the first engaging portion 434 of the movable shaft 43 engages with the fourth engaging portion 411 of the first gear 41, so the first gear 41 and the movable shaft 43 are in a first engaged state in which they can rotate relative to each other. Therefore, the movable shaft 43 and the first gear 41 are in a first engaged state. When the anastomotic device is triggered, the motor 51 is activated, which rotates the first gear 41 via the second gear 52, causing the transmission mechanism 6 to move distally, driving the distal end effector to perform suturing and cutting operations. During this process, the movable shaft 43 does not rotate because the first gear 41 and the movable shaft 43 are in a first engaged state in which they can rotate relative to each other.

[0043] After the anastomosis device is triggered, the state of the emergency device is shown in Figure 6. The first gear 41 is meshed with the tooth surface 61 at the proximal end of the transmission mechanism 6. If the electric mechanism or related mechanical structure fails and it is necessary to manually reset the transmission mechanism 6, this is achieved by steps 1 and 2 described above. Specifically, in step 1, first, the second threaded portion 31 of the drive member 3 is engaged with the first threaded portion 431 at the tip of the movable shaft 43, the second operating lever 22 is rotated, and the drive member 3 is rotationally driven via the first operating lever 21 to move the movable shaft 43 in a first direction, moving the movable shaft 43 and the first gear 41 to a second relative position, the second engaging portion 432 of the movable shaft 43 enters the fourth engaging portion 411 of the first gear 41, forming a non-rotatable engagement with the first gear 41, and moving the movable shaft 43 and the first gear 41 to a second engaged state. Furthermore, the third engaging portion 433 of the movable shaft 43 contacts the fifth engaging portion 412 of the first gear 41, and the movable shaft 43 continues to move in the first direction. The engagement of the third engaging portion 433 and the fifth engaging portion 412 drives the first gear 41 to move in the first direction, causing the first gear 41 to disengage from the second gear 52 and the coupling mechanism 4 to... Electric mechanism 5The elastic member 42 is then detached and compressed to cause elastic deformation, causing the emergency device to transition to the state shown in Figure 13. The elastic member 42 assists in better alignment between the movable shaft 43 and the first gear 41, allowing the second engaging portion 432 to enter the fourth engaging portion 411 more smoothly.

[0044] The aforementioned coupling mechanism 4 Electric mechanism 5 After disengaging, the second threaded portion 31 engages with the first engaging portion 434 of the movable shaft 43. Thus, the length of the first threaded portion 431 is equal to the stroke of the movable shaft 43 from its initial position to the position where the first gear 41 disengages from the second gear 52. Step 2 is then performed, and the second operating lever 22 is rotated, which rotates the second threaded portion 31 by the first operating lever 21. The second threaded portion 31 rotates the first gear 41 in the same direction via the movable shaft 43. The first gear 41 drives the transmission mechanism 6 that meshes with it, causing the transmission mechanism 6 to move proximal to the end along the axial direction of the anastomosis device, thereby resetting the transmission mechanism 6. The emergency device has a simple structure, is easy to operate, and reliably enables manual resetting of the transmission mechanism 6 in the event of a reset failure of the electric mechanism 5.

[0045] Figures 14 to 20 show the structure of an emergency device according to a second embodiment of the present disclosure, in which it engages with other parts of the equipment. This embodiment differs from the first embodiment in that the operating mechanism 2 of the first embodiment drives the movable shaft 43 to move at the top of the outer holder 1, while the operating mechanism 2 of the second embodiment drives the movable shaft 43 to move at one side of the outer holder 1. As shown in Figure 15, the inner holder 7 supports and fixes the first gear 41 and the movable shaft 43. The movable shaft 43 is inserted into the inner holder 7, and the first threaded portion 431 protrudes to the outside of the inner holder 7 and engages with the drive member 3 of the operating mechanism 2. As shown in Figures 16 to 18, in this embodiment, the motor gear train 53 includes a first motor gear 531 and a second motor gear 532, and the first motor gear 531 and the second motor gear 532 are provided with their axes intersecting. As shown in Figure 17, the axis of the first motor gear 531 is indicated by 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 indicated by X2. As shown in Figure 17, X1 and X2 are arranged to intersect. The first motor gear 531 is mounted on the output shaft of the motor 51, and there is an angle between the output shaft of the motor 51 and 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 operating, the motor 51 rotates the first gear 41 via the first motor gear 531 and the second motor gear 532 in sequence.

[0046] As shown in Figures 18 to 20, the first direction D2 (parallel to the S3 direction in Figure 18) is perpendicular to the direction of motion of the transmission mechanism 6 (the S1 direction in Figure 1). In the initial state, the second tooth portion 5322 of the second motor gear 532 is meshed with the first gear 41. In the state shown in Figure 18, by rotating the second operating lever 22, the movable shaft 43 is driven to move in the first direction D2, causing the first gear 41 to move in the first direction, disengaging the first gear 41 from the second tooth portion 5322 of the second motor gear 532, resulting in the state shown in Figure 19. Since the outer diameter of the first tooth portion 5321 is smaller than the outer diameter of the second tooth portion 5322, the first tooth portion 5321 does not interfere with the first gear 41. In this case, the movable shaft 43 and the first gear 41 form a second engagement state, and the drive member 3 rotates the movable shaft 43 and the first gear 41 to reset the transmission mechanism 6.

[0047] Figures 21 to 24 show the structure of an emergency device according to a third embodiment of the present disclosure, in which it engages with other parts of the equipment. This embodiment differs from the first embodiment in that the drive member 3 is detachably connected to the first end of the first operating lever 21. An engagement groove 212 is provided at the first end of the first operating lever 21, and at least a portion of the drive member 3 fits into the engagement groove 212. As shown in Figure 24, the outer surface of the drive member 3 is an engagement surface 32, and the engagement surface 32 engages with the inner surface of the engagement groove 212 to form a connection that is not rotatable relative to the drive member 3. In this embodiment, both the engagement surface 32 of the drive member 3 and the inner surface of the engagement groove 212 are polygonal surfaces. When the operating mechanism 2 is housed without using the operating mechanism 2, the drive member 3 may remain positioned at the tip of the movable shaft 43, thereby maintaining the state in which the second threaded portion on the inside of the drive member 3 engages with the first threaded portion 431. In the initial state, the second gear 52 is meshed with the first gear 41. In the state shown in Figure 22, rotating the second operating lever 22 drives the movable shaft 43 to move in the first direction D3, causing the first gear 41 to move in the first direction, disengaging the first gear 41 from the second gear 52, resulting in the state shown in Figure 23. In this case, the movable shaft 43 and the first gear 41 form a second engagement state, and the drive member 3 rotates the movable shaft 43 and the first gear 41 to reset the transmission mechanism 6.

[0048] The foregoing is a further detailed description of the Disclosure with reference to specific preferred embodiments, and specific embodiments of the Disclosure are not limited to those described herein. Those skilled in the art can make several simple modifications or substitutions without departing from the concept of the Disclosure, all of which fall within the scope of the Disclosure. [Explanation of symbols]

[0049] 1. External holder 12 storage grooves 2 Operating mechanism 21. First operating lever 211 Engagement hole 212 Engagement groove 22. Second operating lever 23 Axis 3. Driving member 31 Second threaded section 32 Engagement surface 4 Connection mechanism 41 First gear 411 Fourth engagement part 412 Fifth engaging part 413 Shaft hole 42 Elastic members 43 Movable axis 431 First threaded section 432 Second engaging part 433 Third engaging part 434 First engagement part 5 Electric mechanism 51 Motor 52 Second gear 53 Motor gear train 531 First motor gear 532 Second motor gear 5321 1st tooth part 5322 2nd tooth part 6. Transmission mechanism 61 Tooth surface 7 Internal holder 71 Position restriction section

Claims

1. An emergency device used in surgical instruments, The surgical instrument includes a transmission mechanism (6) that can move closer to or away from the working end of the surgical instrument when driven, a coupling mechanism (4) connected to the transmission mechanism (6), and an electric mechanism (5) connected to the coupling mechanism (4) that drives the coupling mechanism (4) to move, thereby moving the transmission mechanism (6). The coupling mechanism (4) includes a first gear (41), and the coupling mechanism (4) detaches from the electric motor (5) when the first gear (41) detaches from the electric motor (5). The emergency device includes a movable shaft (43) that 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) is rotatable around the movable shaft (43), and when the movable shaft (43) and the first gear (41) are in a second engagement state, the first gear (41) is restricted and unable to rotate around the movable shaft (43), and the first gear (41) moves in accordance with the movement of the movable shaft (43) and can be disengaged from the electric mechanism (5). The direction of motion of the movable shaft (43) coincides with the direction of motion of the first gear (41). An emergency device characterized by the following features.

2. 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 engaged 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. As the movable shaft (43) moves in the first direction, the movable shaft (43) and the first gear (41) move from the first relative position to the second relative position, and the first direction is perpendicular to the direction in which the transmission mechanism (6) approaches or moves away from the working end of the surgical instrument. The emergency device according to feature 1.

3. The movable shaft (43) includes a first engaging portion (434), a second engaging portion (432), and a third engaging portion (433), and the first gear (41) includes a fourth engaging portion (411) and a fifth engaging portion (412), When the movable shaft (43) and the first gear (41) are in the first engagement state, the first engagement portion (434) engages with the fourth engagement portion (411), allowing 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 portion (432) engages with the fourth engagement portion (411), restricting the first gear (41) from rotating around the movable shaft (43). When the movable shaft (43) is driven and moves, the engagement of the third engaging portion (433) and the fifth engaging portion (412) causes the first gear (41) to move, and the first gear (41) disengages from the electric mechanism (5). The emergency device according to feature 2.

4. The first gear (41) includes a shaft hole (413), the movable shaft (43) is inserted into the shaft hole (413) of the first gear (41), and the movable shaft (43) is provided with a first threaded portion (431). The emergency device further includes a drive member (3), the drive member (3) is provided with a second screw portion (31) that engages with the first screw portion (431), and the drive member (3) drives the movable shaft (43) to move when it rotates. The emergency device according to feature 3.

5. Both ends of the movable shaft (43) protrude from both end faces of the first gear (41), the first threaded portion (431) is provided at the first end of the movable shaft (43), the third engaging portion (433) is provided at the second end of the movable shaft (43), and the outer diameter of the third engaging portion (433) is larger than the inner diameter of the shaft hole (413) of the first gear (41). The emergency device according to feature 4.

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

7. After the first gear (41) is disengaged from the electric mechanism (5), the movable shaft (43) is rotationally driven by the rotation of the drive member (3), and the engagement of the second engaging portion (432) and the fourth engaging portion (411) rotates the first gear (41). The emergency device according to feature 6.

8. The emergency device further includes an elastic member (42), the elastic member (42) configured to apply a biasing force to the first gear (41) along a second direction, the second direction being opposite to the first direction. The emergency device according to feature 4.

9. The first threaded portion (431) is a male thread provided on the outer surface of the movable shaft (43), the drive member (3) is fitted to the outside of the first threaded portion (431) at least in part, and the second threaded portion (31) is a female thread provided on the inside of the drive member (3). The emergency device according to feature 4.

10. The emergency device further includes a first operating lever (21), and the first end of the first operating lever (21) is provided with the drive member (3). The emergency device according to feature 9.

11. The electric mechanism (5) includes a motor (51) and a motor gear train (53), the output shaft of the motor (51) is capable of rotationally driving the motor gear train (53), at least a portion of the motor gear train (53) is located on one side of the first gear (41) in a second direction, the second direction is opposite to the first direction, the motor gear train (53) includes a second gear (52), and when the electric mechanism (5) is connected to the coupling mechanism (4), the first gear (41) and the second gear (52) mesh, and the output shaft of the motor (51) is parallel to the first direction. The emergency device according to feature 4.

12. The motor gear train (53) includes a first motor gear (531) and a second motor gear (532), wherein the first motor gear (531) and the second motor gear (532) are arranged so that their axes intersect, and the output shaft of the motor (51) is parallel to the first direction, or the output shaft of the motor (51) has an angle between it and the first direction. The emergency device according to feature 11.

13. An emergency device including the one described in any one of claims 1 to 12, A surgical instrument characterized by the following features.

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