Emergency and surgical equipment

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] FIELD OF THE DISCLOSURE The present disclosure relates to the field of medical equipment, and more particularly to emergency and surgical equipment. [Background technology]

[0002] In the prior art, some surgical instruments require a surgeon to operate a trigger mechanism at a proximal end to drive a transmission shaft toward the distal end and cause a working mechanism at the distal end to perform a predetermined surgical operation. Taking a surgical stapler as an example, a conventional surgical stapler includes an stapler body, a trigger mechanism (e.g., 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 disposed opposite each other. During surgery, tissue is placed between the anvil and the staple cartridge, and the distance between the anvil and the staple cartridge is adjusted to gradually clamp the tissue. Thereafter, the surgeon operates the trigger mechanism to drive the drive assembly toward the distal end, thereby forming staples on the anvil and completing the anastomosis of the tissue.

[0003] During use, surgeons typically need to apply a large amount of force to the trigger mechanism to complete the procedure, which is extremely inconvenient. For this reason, motor-driven surgical instruments have been newly developed. By operating the motor, the surgeon rotates the motor output shaft in a predetermined direction, which then drives the transmission mechanism to move toward the distal end. After completing the procedure, the surgeon can rotate the motor output shaft in the opposite direction, which activates the power return function to drive the transmission mechanism toward the proximal end, thereby resetting the entire instrument. However, if the motor, related equipment, or electronic components fail, the power return function will no longer function, making it impossible to reset the instrument and open the end effector forceps port, disrupting the smooth operation of the surgical procedure. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the problems in the prior art, an object of the present disclosure is to provide an emergency device and surgical instrument that allows manual resetting of the transmission mechanism when the powered return mechanism cannot reset the transmission mechanism after the anastomosis instrument is triggered. [Means for solving the problem]

[0005] An embodiment of the present disclosure provides an emergency device for use with a surgical instrument, the surgical instrument including: a transmission mechanism that can move toward or away from a 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 disengages from the electric mechanism when the first gear disengages from the electric mechanism. The emergency device includes a movable shaft movably inserted into the first gear, such that when the movable shaft and the first gear are in a first engagement state, the first gear is rotatable about the movable shaft, and when the movable shaft and the first gear are in a second engagement state, the first gear is restricted and cannot rotate about the movable shaft, and the first gear moves with the movement of the movable shaft to disengage from the electric mechanism. Here, the direction of movement of the movable shaft coincides with the direction of movement 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 state of engagement, 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 state of engagement. Movement of the movable shaft in a first direction causes the movable shaft and the first gear to transition from the first relative position to the second relative position, the first direction being perpendicular to the direction in which the transmission mechanism moves toward or away from the working end of the surgical instrument.

[0007] In some embodiments, the movable shaft includes a first engagement portion, a second engagement portion, and a third engagement portion, and the first gear includes a fourth engagement portion and a fifth engagement portion. When the movable shaft and the first gear are in the first engagement state, the first engagement portion engages with the fourth engagement portion, allowing the first gear to rotate around the movable shaft. When the movable shaft and the first gear are in the second engagement state, the second engagement portion engages with the fourth engagement portion, restricting the first gear so that it cannot rotate around the movable shaft. When the movable shaft is driven to move, the first gear moves due to the engagement between the third engagement portion and the fifth engagement portion, 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 thread portion. The emergency device further includes a drive member, the drive member is provided with a second thread portion that engages with the first thread 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 both side end surfaces of the first gear, the first threaded portion is provided on a first end of the movable shaft, the third engagement portion is provided on a second end of the movable shaft, and the outer diameter of the third engagement portion is larger than the inner diameter of the shaft hole of the first gear.

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

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

[0012] In some embodiments, the emergency device further includes an elastic member configured to apply a biasing force to the first gear along a second direction, 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, at least a portion of the drive member is externally fitted onto the outside of the first threaded portion, 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, and the drive member is provided at a first end of the first operating lever.

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

[0016] In some embodiments, an outer surface of the drive member engages with an inner surface of the engagement hole or engagement groove to form a non-rotatable connection.

[0017] In some embodiments, the drive member is removably coupled to a first end of a first operating lever.

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

[0019] In some embodiments, the emergency device further includes an outer holder, wherein the first gear and the movable shaft are at least partially located inside the outer holder, and an accommodating groove is provided on one side of the outer holder, and at least a portion of the second operating lever can be positioned within the accommodating groove.

[0020] In some embodiments, the electric mechanism includes a motor and a motor gear train, an output shaft of the motor is capable of rotatably 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 is opposite to the first direction, the motor gear train includes a second gear, and when the electric mechanism is connected to the connecting mechanism, the first gear and the second gear mesh with each other, 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 intersecting axes, and the output shaft of the motor is parallel to a first direction or has an included angle with the first direction.

[0022] An embodiment of the present disclosure further provides a surgical instrument including the emergency device described above. [Effects of the Invention]

[0023] The emergency device and surgical instrument according to the present disclosure have the following advantages.

[0024] According to the present disclosure, if the electric mechanism cannot reset the transmission mechanism after the instrument is triggered, the movable shaft can drive the first gear to disengage from the electric mechanism, and the movable shaft can rotate the first gear to reset the transmission mechanism, thereby realizing manual resetting of the transmission mechanism in an emergency, facilitating operation by the surgeon in an emergency and ensuring the smooth progress of surgery.

[0025] In addition, a drive member is provided at a first end of the first operating lever, and the drive member is provided with a second threaded portion that engages with the first threaded portion of the movable shaft, so that the drive member drives the movable shaft to move when rotated. As a result, when the surgeon operates the emergency device, the first operating lever is always connected to the movable shaft without falling off, allowing for smooth manual resetting of the transmission mechanism in an emergency. This prevents the first operating lever and the movable shaft from falling off, making it difficult to smoothly reset the transmission mechanism in an emergency, and avoids the surgeon becoming more nervous in an emergency, which could affect the effectiveness of the surgery. [Brief explanation of the drawings]

[0026] Other features, objects, and advantages of the present disclosure will become more apparent from the detailed description of exemplary embodiments given below with reference to the drawings. [Figure 1] 1 is a schematic diagram showing an emergency device according to a first embodiment of the present disclosure engaged with other components of equipment. [Figure 2] 1 is a schematic diagram showing an emergency device according to a first embodiment of the present disclosure engaged with other components of equipment. [Figure 3] 1 is a schematic diagram showing an emergency device according to a first embodiment of the present disclosure engaged with other components of equipment. [Figure 4] FIG. 2 is a structural schematic diagram of an outer holder according to the first embodiment of the present disclosure. [Figure 5] 1 is a schematic diagram showing an emergency device according to a first embodiment of the present disclosure, with the outer holder omitted, engaged with other components of the device. FIG. [Figure 6] 1 is a schematic diagram showing an emergency device according to a first embodiment of the present disclosure, with the outer holder and inner holder omitted, engaged with other components of the device. FIG. [Figure 7] 1 is a front view of an emergency device according to a first embodiment of the present disclosure, with the outer holder and inner holder omitted, engaged with other components of the device. FIG. [Figure 8] FIG. 1 is a schematic diagram illustrating a state in which a movable shaft is engaged with another component of a device according to the first embodiment of the present disclosure. [Figure 9] FIG. 10 is a structural schematic diagram showing the operation mechanism engaged with the drive member according to the first embodiment of the present disclosure. [Figure 10] FIG. 10 is a structural schematic diagram showing a state in which a movable shaft is engaged with a first gear according to the first embodiment of the present disclosure. [Figure 11] FIG. 10 is a schematic diagram illustrating a state in which the movable shaft is separated from the first gear according to the first embodiment of the present disclosure. [Figure 12] FIG. 10 is a schematic diagram illustrating a state in which the movable shaft is separated from the first gear according to the first embodiment of the present disclosure. [Figure 13] FIG. 10 is a schematic diagram illustrating an emergency device engaged with other components of the device when a first gear is disengaged from an electric mechanism according to the first embodiment of the present disclosure. [Figure 14] FIG. 10 is a schematic diagram of an emergency device engaged with other components of equipment according to a second embodiment of the present disclosure. [Figure 15] FIG. 10 is a schematic diagram showing an emergency device according to a second embodiment of the present disclosure, with the outer holder omitted, engaged with other components of the device. [Figure 16] FIG. 10 is a front view of an emergency device according to a second embodiment of the present invention, in which the outer holder and the inner holder are omitted, engaged with other components of the device. [Figure 17] FIG. 10 is a schematic diagram showing an emergency device according to a second embodiment of the present disclosure, with the outer holder and inner holder omitted, engaged with other components of the device. [Figure 18] FIG. 10 is a bottom view of the second embodiment of the present disclosure, showing the movable shaft engaged with other components of the device. [Figure 19] FIG. 10 is a schematic diagram illustrating an emergency device engaged with other components of the equipment when the first gear is not disengaged from the second motor gear according to the second embodiment of the present disclosure. [Figure 20] FIG. 10 is a schematic diagram illustrating an emergency device engaged with other components of the equipment when the first gear is disengaged from the second motor gear according to the second embodiment of the present disclosure. [Figure 21] FIG. 10 is a front view of an emergency device engaged with other pieces of equipment according to a third embodiment of the present disclosure. [Figure 22] FIG. 10 is a schematic diagram of an emergency device engaged with other components of equipment according to a third embodiment of the present disclosure. [Figure 23] FIG. 11 is a front view of the emergency device engaged with other components of the device when the first gear is disengaged from the electric mechanism according to the third embodiment of the present disclosure. [Figure 24] FIG. 10 is a structural schematic diagram of an operation mechanism according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present embodiment will be described in more detail below with reference to the drawings. Note that the embodiments may be implemented in various forms and are not limited to the embodiments described herein. These embodiments are provided for the purpose of fully conveying the technical concepts of the embodiments to those skilled in the art, so that this disclosure will be complete and comprehensive. In the drawings, identical or similar components are designated by the same reference numerals, and redundant descriptions will be omitted. In the specification, "or" can mean "and" or "or." Terms such as "above," "below," and "between" are used herein for convenience to describe different exemplary components and elements of the present disclosure, for example, based on the exemplary directions shown in the drawings. Nothing described herein requires a specific three-dimensional orientation of a structure to fall within the scope of the present disclosure. In the specification, terms such as "first," "second," "third," "sixth," etc. are used to indicate several features and are not intended to limit the number or importance of specific components.

[0028] The present disclosure provides an emergency device for use with a surgical instrument, and a surgical instrument including the 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 can move toward or away from the working end of the surgical instrument when driven, a linkage mechanism connected to the transmission mechanism, and an electric mechanism connected to the linkage mechanism and driving the linkage mechanism to move the transmission mechanism, the linkage mechanism including a first gear, and the linkage mechanism disengaging from the electric mechanism upon disengagement of the first gear from the electric mechanism. The surgical instrument may be, for example, a surgical anastomosis instrument or other surgical instrument.

[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 and cannot rotate around the movable shaft, and rotation of the movable shaft can rotate and drive the first gear. The first gear moves along with the movement of the movable shaft and can be disengaged from the electric mechanism. Here, the direction of movement of the movable shaft is the same as the direction of movement of the first gear. Therefore, if the electric mechanism cannot reset the transmission mechanism after the device is triggered, the movable shaft can drive the first gear to disengage from the electric mechanism, and the movable shaft can rotate and drive the first gear to reset the transmission mechanism. This allows manual resetting of the transmission mechanism in an emergency.

[0030] Hereinafter, the structures of the emergency device and surgical instrument according to each embodiment of the present disclosure will be described in detail with reference to the drawings, but each embodiment does not limit the scope of protection of the present disclosure.

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

[0032] As shown in FIGS. 1 to 8 , the instrument body includes a transmission mechanism 6 that can move toward or away from the working end of the surgical instrument when driven, a connecting mechanism 4 connected to the transmission mechanism 6, and an electric mechanism 5. The electric mechanism is connected to the connecting mechanism 4 and is configured to drive the connecting mechanism 4 to move the transmission mechanism 6. The transmission mechanism 6 has a toothed surface 61 on the side facing the connecting mechanism 4. The connecting mechanism 4 includes a first gear 41, and the first gear 41 meshes with the toothed surface 61 of the transmission mechanism 6. The connecting mechanism 4 disengages from the electric mechanism 5 when the first gear 41 disengages from the electric mechanism 5. The electric mechanism 5 includes a motor 51 and a motor gear train, and 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 an initial state, the first gear 41 and the second gear 52 mesh with each other, and the motor 51 can drive the transmission mechanism 6 to move toward the distal end or the proximal end via the second gear 52 and the first gear 41. When the first gear 41 disengages from the second gear 52, the coupling mechanism 4 and the electric mechanism 5 are disengaged, and the electric mechanism 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 another embodiment, 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 gear 41 and second gear 52 disengage, the coupling mechanism 4 and the electric mechanism 5 are disengaged.

[0033] In this disclosure, the distal side and proximal side are defined relative to the operator, with the side closest to the operator being the proximal side, and the side farther from the operator, i.e., the side closest to the surgical location, being the distal end. The axial direction is the direction along the axis of the anastomosis instrument, i.e., the direction from the distal end to the proximal end of the anastomosis instrument, or the direction from the proximal side to the distal end of the anastomosis instrument. For example, in the perspective of FIG. 1, the S1 direction is the direction from the distal end to the proximal end, and the transmission mechanism 6 can move in the S1 direction or the direction opposite to the S1 direction. The S2 direction in FIG. 1 is defined as the vertical direction, i.e., the height direction. The S3 direction in FIG. 1 is defined as the horizontal direction, i.e., the width direction. In this disclosure, the inside and outside of a part are defined relative to the center of the part, with the side closer to the center being the inside and the side farther from the center being the outside.

[0034] As shown in FIGS. 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 onto the outside of 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 a 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 (state of FIG. 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, the movable shaft 43 and the first gear 41 are in a second engagement state (state of FIG. 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 a first direction, the first gear 41 can be moved in the first direction to disengage 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 no longer meshes with 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 instrument is triggered, manual resetting 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 a first direction while the first gear 41 does not move, thus transitioning the movable shaft 43 and the first gear 41 from the first relative position to the second relative position, thereby transitioning the movable shaft 43 and the first gear 41 from the first engaged state to the second engaged state. Thereafter, the movable shaft 43 continues to be driven to move 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 FIG. 13 ). In step 2, the movable shaft 43 is driven to rotate, rotating 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 to drive the transmission mechanism 6 to move in the proximal direction. In this embodiment, the first direction is an upward direction D1 in FIG. 6 (parallel to the S2 direction in FIG. 1) and perpendicular to the movement direction of the transmission mechanism 6 (the S1 direction or the opposite direction to S1).

[0036] Therefore, the movable shaft 43 has two main 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 operation mechanism 2 and a drive member 3 that drive the movable shaft 43 to execute these two motion modes. As shown in FIGS. 2 to 6, the operation mechanism 2 includes a first operation lever 21 and a second operation lever 22, and the drive member 3 is provided at a first end of the first operation lever 21, and a second end of the first operation lever 21 is connected to the second operation lever 22 via a pivot 23. The operation mechanism 2 has two states. When the operation mechanism 2 does not need to be used, it is accommodated on one side of the outer holder 1 as shown in FIGS. 2 and 3, and at least a portion of the second operation lever 22 is inserted into the accommodation groove 12 of the outer holder 1 as shown in FIG. 4. When the operating mechanism 2 needs to be used, the driving 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 via the first operating lever 21 and the driving member 3 in sequence. The inner 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 driving member 3 to limit the engagement position between the first operating lever 21 and the movable shaft 43. In this embodiment, an engagement hole 211 is provided at a first end of the first operating lever 21, and at least a portion of the driving member 3 is fitted into the engagement hole 211. The first operating lever 21 may be fixedly connected to the driving member 3. Alternatively, the driving member 3 may be removed from the engagement hole 211 when not in use. The outer surface of the driving member 3 engages with the inner surface of the engagement hole 211 to form a connection that prevents relative rotation, and in this embodiment, the outer surface of the driving member 3 and the inner surface of the engagement hole 211 are both polygonal surfaces. In other embodiments, the driving member 3 and the first operating lever 21 may be integrally molded or fixedly connected via a fixing member.

[0037] As shown in FIGS. 6 to 12, the movable shaft 43 includes a first threaded portion 431, a first engagement portion 434, a second engagement portion 432, and a third engagement portion 433, which are provided in this order along the axial direction of the movable shaft 43. Both ends of the movable shaft 43 protrude from both end surfaces of the first gear 41, respectively. The first threaded portion 431 is provided at the first end of the movable shaft 43, and the third engagement 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 engagement 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 threadedly engaged with the first threaded portion 431. When the second threaded portion 31 engages with the first threaded portion 431, rotation of the driving member 3 can drive the movable shaft 43 to linearly move in a 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 cannot rotate relative to it, and rotation of the driving member 3 can drive the movable shaft 43 to rotate in the same direction.

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

[0039] The outer diameter of the first engagement portion 434 is smaller than the minimum inner diameter of the fourth engagement portion 411. Therefore, 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. The outer diameter of the third engagement 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 engagement portion 433 does not enter the inside of the first gear 41, but abuts and engages with the fifth engagement 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, the first rotation stop structure engages with the second rotation stop structure, and 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] 11 and 12 , the emergency device further includes an elastic member 42, which is 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 provided above the first gear 41. In other alternative embodiments, the elastic member 42 may be an elastic mat or an elastic plate provided above the first gear 41, or a tension spring provided below the first gear 41, etc.

[0041] Hereinafter, the operation process of the emergency device will be described in detail with reference to FIGS.

[0042] In an initial state, when the anastomosis instrument 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 engagement portion 434 of the movable shaft 43 engages with the fourth engagement portion 411 of the first gear 41, so the first gear 41 and the movable shaft 43 are in a first engagement state in which they can rotate relative to each other. Therefore, the movable shaft 43 and the first gear 41 are in a first engagement state. When the anastomosis instrument is triggered, the motor 51 is operated, and the motor 51 rotates the first gear 41 via the second gear 52, moving the transmission mechanism 6 in the distal direction and driving the end effector at the distal end to perform a suturing or cutting operation. During this process, the movable shaft 43 does not rotate because the first gear 41 and the movable shaft 43 are in the first engagement state in which they can rotate relative to each other.

[0043] After the anastomosis instrument is triggered, the state of the emergency device is as shown in Figure 6. The first gear 41 is engaged with the tooth surface 61 at the proximal end of the transmission mechanism 6. If the electric mechanism or related mechanical structures fail and the transmission mechanism 6 needs to be manually reset, this can be achieved by following steps 1 and 2 described above. Specifically, in step 1, the second threaded portion 31 of the drive member 3 is first 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, moving the movable shaft 43 in a first direction and shifting 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 and engages with the first gear 41 to prevent relative rotation, shifting the movable shaft 43 and the first gear 41 to a second engaged state. Furthermore, the third engagement portion 433 of the movable shaft 43 abuts against the fifth engagement portion 412 of the first gear 41, the movable shaft 43 continues to move in the first direction, the movable shaft 43 drives the first gear 41 to move in the first direction due to the engagement between the third engagement portion 433 and the fifth engagement portion 412, the first gear 41 disengages from the second gear 52, disengages the connecting mechanism 4 from the motor 51 mechanism, and further compresses the elastic member 42 to elastically deform, and the emergency device transitions to the state shown in Fig. 13. The elastic member 42 assists in better alignment between the movable shaft 43 and the first gear 41, and the second engagement portion 432 enters the fourth engagement portion 411 more smoothly.

[0044] After the connecting mechanism 4 disengages from the motor 51 mechanism, the second threaded portion 31 engages with the first engagement portion 434 of the movable shaft 43. Therefore, 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 at which the first gear 41 disengages from the second gear 52. Now, perform step 2 by continuing to rotate the second operating lever 22, which rotates the second threaded portion 31 via the first operating lever 21. The second threaded portion 31 rotates the first gear 41 in the same direction via the movable shaft 43, and the first gear 41 drives the transmission mechanism 6 that meshes with it, moving the transmission mechanism 6 toward the proximal end along the axial direction of the anastomosis instrument and resetting the transmission mechanism 6. This emergency device has a simple structure, is easy to operate, and can reliably reset the transmission mechanism 6 manually in the event of a reset failure of the electric mechanism 5.

[0045] 14 to 20 show a structure in which an emergency device according to a second embodiment of the present disclosure is engaged with other components of equipment. This embodiment differs from the first embodiment in that, while the operating mechanism 2 of the first embodiment drives the movable shaft 43 to move at the top of the outer holder 1, the operating mechanism 2 of the second embodiment drives the movable shaft 43 to move on one side of the outer holder 1. As shown in FIG. 15, the inner holder 7 serves to support and fix 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 outside the inner holder 7 and engages with the drive member 3 of the operating mechanism 2. As shown in FIGS. 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 arranged with their axes intersecting. As shown in FIG. 17, the axis of the first motor gear 531 is indicated by X1 and 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 FIG. 17, X1 and X2 intersect. The first motor gear 531 is mounted on the output shaft of the motor 51, and an included angle is formed 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 an 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 operated, the motor 51 rotates the first gear 41 via the first motor gear 531 and the second motor gear 532 in that order.

[0046] 18 to 20, the first direction D2 (parallel to the S3 direction in FIG. 18) is perpendicular to the movement direction of the transmission mechanism 6 (the S1 direction in FIG. 1). In an initial state, the second teeth portion 5322 of the second motor gear 532 meshes with the first gear 41. In the state of FIG. 18, by rotating the second operating lever 22, the movable shaft 43 is driven to move in the first direction D2, and the first gear 41 is moved in the first direction, causing the first gear 41 to disengage from the second teeth portion 5322 of the second motor gear 532, resulting in the state of FIG. 19. Because the outer diameter of the first teeth portion 5321 is smaller than the outer diameter of the second teeth portion 5322, the first teeth 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 driving member 3 rotates the movable shaft 43 and the first gear 41, thereby resetting the transmission mechanism 6.

[0047] 21 to 24 show a structure in which an emergency device according to a third embodiment of the present disclosure is engaged with other components of the device. This embodiment differs from the first embodiment in that the drive member 3 is detachably coupled to a 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 FIG. 24, the outer surface of the drive member 3 is an engagement surface 32, which engages with the inner surface of the engagement groove 212 to form a connection that prevents relative rotation. 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 a state in which the second threaded portion on the inner side of the drive member 3 is engaged with the first threaded portion 431. In an initial state, the second gear 52 is engaged with the first gear 41. In the state of Fig. 22, by rotating the second operating lever 22, the movable shaft 43 is driven to move in the first direction D3, and the first gear 41 is moved in the first direction, causing the first gear 41 to disengage from the second gear 52, resulting in the state of Fig. 23. In this case, the movable shaft 43 and the first gear 41 form a second engaged state, and the movable shaft 43 and the first gear 41 are rotationally driven by the driving member 3, thereby resetting the transmission mechanism 6.

[0048] The above is a further detailed description of the present disclosure with reference to specific preferred embodiments, and the specific embodiments of the present disclosure are not limited to these descriptions. Those skilled in the art can make some simple modifications or substitutions without departing from the concept of the present disclosure, all of which fall within the protection scope of the present disclosure. [Explanation of symbols]

[0049] 1 Outer holder 12 Receiving groove 2 Operating mechanism 21 First operating lever 211 Engagement hole 212 Engagement groove 22 Second operating lever 23 Axis 3 Driving member 31 Second screw section 32 Engagement surface 4 Connection mechanism 41 First Gear 411 Fourth engagement part 412 Fifth engagement part 413 Shaft hole 42 Elastic member 43 Movable axis 431 First screw part 432 Second engagement part 433 Third engagement 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 Inner holder 71 Position restriction section

Claims

1. 1. An emergency device for use with a surgical instrument, comprising: The surgical instrument includes a transmission mechanism (6) that can move toward or away from a working end of the surgical instrument when driven, a linkage mechanism (4) connected to the transmission mechanism (6), and an electric mechanism (5) connected to the linkage mechanism (4) and driving the linkage mechanism (4) to move the transmission mechanism (6), The coupling mechanism (4) includes a first gear (41), and the coupling mechanism (4) is disengaged from the electric mechanism (5) when the first gear (41) is disengaged from the electric mechanism (5); The emergency device includes a movable shaft (43) 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 cannot rotate around the movable shaft (43), and the first gear (41) moves along with the movement of the movable shaft (43) and can be disengaged from the electric mechanism (5); The moving direction of the movable shaft (43) coincides with the moving direction of the first gear (41). An emergency device characterized by:

2. 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 the first engagement state; When the movable shaft (43) and the first gear (41) are in a second relative position, the movable shaft (43) and the first gear (41) are in the second engagement state; When the movable shaft (43) moves in a 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) moves toward or away from the working end of the surgical instrument.

2. An emergency device according to claim 1.

3. The movable shaft (43) includes a first engagement portion (434), a second engagement portion (432) and a third engagement portion (433), and the first gear (41) includes a fourth engagement portion (411) and a fifth engagement 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) 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 portion (432) engages with the fourth engagement portion (411) to restrict the first gear (41) so that it cannot rotate around the movable shaft (43); When the movable shaft (43) is driven to move, the first gear (41) moves due to the engagement between the third engagement portion (433) and the fifth engagement portion (412), and the first gear (41) disengages from the electric mechanism (5).

3. An emergency device according to claim 2.

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

4. An emergency device according to claim 3.

5. Both ends of the movable shaft (43) protrude from both side end surfaces of the first gear (41), the first threaded portion (431) is provided at a first end of the movable shaft (43), the third engaging portion (433) is provided at a 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).

5. An emergency device according to claim 4.

6. The first engagement portion (434) of the movable shaft (43) is located between the first threaded portion (431) and the second engagement portion (432), and the outer diameter of the first engagement portion (434) is equal to or smaller than the inner diameter of the shaft hole (413) of the first gear (41).

6. An emergency device according to claim 5.

7. After the first gear (41) is disengaged from the electric mechanism (5), when the movable shaft (43) is rotationally driven by the rotation of the drive member (3), the second engaging portion (432) and the fourth engaging portion (411) engage with each other to rotate the first gear (41).

7. An emergency device according to claim 6.

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

5. An emergency device according to claim 4.

9. The first screw portion (431) is a male screw provided on the outer surface of the movable shaft (43), at least a portion of the driving member (3) is externally fitted onto the outside of the first screw portion (431), and the second screw portion (31) is a female screw provided on the inside of the driving member (3).

5. An emergency device according to claim 4.

10. The emergency device further includes a first operating lever (21), and the driving member (3) is provided at a first end of the first operating lever (21).

10. An emergency device according to claim 9.

11. An engagement hole (211) or an engagement groove (212) is provided at a first end of the first operating lever (21), and at least a portion of the driving member (3) is fitted into the engagement hole (211) or the engagement groove (212).

11. An emergency device according to claim 10.

12. The outer surface of the driving member (3) engages with the inner surface of the engagement hole (211) or the engagement groove (212) to form a connection that is non-rotatable relative to the driving member (3).

12. An emergency device according to claim 11.

13. The drive member (3) is detachably connected to a first end of the first operating lever (21).

12. An emergency device according to claim 11.

14. The emergency device further includes a second operating lever (22), the second operating lever (22) being connected to a second end of the first operating lever (21).

11. An emergency device according to claim 10.

15. The emergency device further includes an outer holder (1), and the first gear (41) and the movable shaft (43) are at least partially located inside the outer holder (1); A receiving groove (12) is provided on one side of the outer holder (1), and at least a portion of the second operating lever (22) can be placed in the receiving groove (12).

15. An emergency device according to claim 14.

16. The electric mechanism (5) includes a motor (51) and a motor gear train (53), an output shaft of the motor (51) is capable of rotating 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), when the electric mechanism (5) is connected to the connecting mechanism (4), the first gear (41) and the second gear (52) mesh with each other, and the output shaft of the motor (51) is parallel to the first direction.

5. An emergency device according to claim 4.

17. The motor gear train (53) includes a first motor gear (531) and a second motor gear (532), the first motor gear (531) and the second motor gear (532) are arranged with their axes intersecting, and the output shaft of the motor (51) is parallel to the first direction or has an included angle with the first direction.

17. An emergency device according to claim 16.

18. An emergency device according to any one of claims 1 to 17, A surgical instrument characterized by:

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