A surgical instrument and a manual resetting unit adapted for the surgical instrument

Abstract

The present invention discloses a surgical instrument and a manual reset unit adapted for the surgical instrument. The surgical instrument comprises an adaptor unit, which comprises a handle housing, and a first plug interface is provided at the proximal end of the handle housing; a reusable power unit, which comprises a drive housing and a drive assembly accommodated in the drive housing, and a second plug interface is provided at the proximal end of the drive housing; a manual reset unit, which is detachably connected to the power unit along the first plug interface of the handle housing and the second plug interface of the drive housing, and the manual reset unit comprises a reset transmission assembly, and the transmission input end of the reset transmission assembly is operably connected to the reset wrench, and the transmission output end of the reset transmission assembly is operably connected to the drive assembly. The manual reset of the surgical instrument of the present invention is safe and reliable, and sterile contact with the outside world is achieved during the manual reset process.

Description

Technical Field

[0001] The present invention relates to the field of surgical instruments, and in particular to a clamping, cutting and anastomosis surgical instrument. Background Art

[0002] Linear clamping, cutting and stapling surgical instruments can clamp, suture / suturing and cut tissues during surgical operations. With the development of medical device technology, electric surgical stapling instruments are moving towards intelligence, resulting in an exponential increase in the cost of the instruments. In recent years, in order to reduce the cost of surgical instruments, surgical instruments that are at least partially reusable have received increasing attention.

[0003] For partially reusable electric surgical stapling instruments, the reusable part or the non-sterilized part is usually the handle assembly part with a relatively high cost control unit and power unit, and the disposable part or the sterilized part is usually the slender body assembly and the end actuator assembly part. This type of instrument usually achieves the sterile isolation of the reusable part by covering the reusable or non-sterilized handle part with a disposable or sterilized drive housing. Since the motor and battery of the fully electric stapler have a certain risk of failure during use, the electric stapler needs to provide a corresponding emergency method, which usually requires the instrument operator to manually reset the drive assembly to a state where it can be removed from the patient's body, such as resetting the end actuator assembly to a position consistent with the extension direction of the slender body assembly so that the instrument can be removed from the patient's body, or resetting the firing member to the initial position, etc. For partially reusable electric surgical stapling instruments, how to design a manual reset structure to achieve safe, convenient and quick clutch, while avoiding sterile contact with disposable components during the manual reset process is a technical problem faced by technicians in this field. Summary of the invention

[0004] To this end, the present invention provides a surgical instrument, which can be safely and reliably manually reset and can achieve sterile contact with the outside during the manual reset process.

[0005] In view of the above technical problems, the present invention provides the following technical solutions:

[0006] A surgical instrument comprises: an adapter unit, which includes a handle shell, and a first plug interface is provided at the proximal end of the handle shell; a reusable power unit, which includes a drive shell and a drive assembly accommodated in the drive shell, and the drive assembly is suitable for providing driving force, and a second plug interface is provided at the proximal end of the drive shell; a manual reset unit, which is detachably engaged with the power unit along the first plug interface of the handle shell and the second plug interface of the drive shell, and the manual reset unit includes a reset transmission assembly, the transmission input end of the reset transmission assembly is operably engaged with a reset wrench, and the transmission output end of the reset transmission assembly is operably engaged with the drive assembly, and the manual reset unit drives the drive assembly to reset by cooperating with the reset wrench.

[0007] In some embodiments of the present invention, the reset transmission assembly includes a reset trigger rod, a proximal end of the reset trigger rod is suitable for transmission engagement with the reset wrench, and a distal end of the reset trigger rod is suitable for transmission engagement with the drive assembly.

[0008] In some embodiments of the present invention, the manual reset unit includes a mounting shell, the reset trigger rod is slidably accommodated in the mounting shell, and can be driven to move between a first position and a second position; when the reset trigger rod is in the first position, the reset trigger rod is in transmission engagement with the drive assembly; when the reset trigger rod is in the second position, the reset trigger rod is separated from the drive assembly.

[0009] In some embodiments of the present invention, the reset transmission assembly further includes a reset elastic member, which acts on the reset trigger rod and is suitable for providing a biasing force to the reset trigger rod to keep it in the first position.

[0010] In some embodiments of the present invention, the drive assembly includes a drive output rod, a drive motor transmission-connected to the drive output rod, a drive gear set and a lead screw nut assembly; the drive gear set includes a driving gear and a driven gear meshingly connected; the lead screw nut assembly includes a transmission screw connected to the driven gear and a transmission nut threadedly connected to the transmission screw, the drive output rod is connected to the transmission nut, and the distal end of the reset trigger rod is suitable for transmission connection to the transmission screw.

[0011] In some embodiments of the present invention, a plug-in slot is provided at the proximal end of the transmission screw, and when the manual reset unit is coupled to the power unit, the distal end of the reset trigger rod is plugged into the plug-in slot.

[0012] In some embodiments of the present invention, the proximal end of the transmission screw extends to the proximal end surface of the drive housing and is sealed and connected to the second plug interface.

[0013] In some embodiments of the present invention, the reset transmission assembly also includes an adjusting member fixedly connected to the proximal end of the mounting shell, the proximal end of the adjusting member is suitable for transmission engagement with the reset wrench, the distal end of the adjusting member is transmission connected to the reset trigger rod, and the reset elastic member is located between the adjusting member and the reset trigger rod.

[0014] In some embodiments of the present invention, a polygonal plug-in hole is provided in the adjusting member, the proximal end of the reset trigger rod is slidably inserted into the plug-in hole of the adjusting member, and the distal end of the plug-in hole is suitable for engaging the reset wrench.

[0015] In some embodiments of the present invention, the drive assembly includes a firing drive assembly and a bending drive assembly, and the manual reset unit includes a firing reset transmission assembly and a bending reset transmission assembly, the firing reset transmission assembly is in transmission engagement with the firing drive assembly, and the bending reset transmission assembly is in transmission engagement with the bending drive assembly.

[0016] In some embodiments of the present invention, the power unit is also provided with a control button for controlling the start / shutdown of the drive motor, and the manual reset unit also includes a motor switch triggering part. When the manual reset unit is engaged with the power unit, the motor switch triggering part is suitable for triggering the control button to turn off the drive motor.

[0017] In some embodiments of the present invention, the outer contour of the mounting housing of the manual reset unit matches the shape of the first plug-in interface of the handle housing.

[0018] In some embodiments of the present invention, at least one positioning rib is provided in the middle area of ​​the first plug interface, and at least one limiting clamping portion is provided at the distal end of the mounting shell of the manual reset unit, and the limiting clamping portion cooperates with the positioning rib to realize the connection between the manual reset unit and the handle shell.

[0019] In some embodiments of the present invention, a protective cover is further included which is detachably connected to the first plug interface of the handle housing, and when the manual reset unit is not engaged with the power unit, the protective cover closes the handle housing.

[0020] In some embodiments of the present invention, the adapter unit further comprises a slender body assembly connected to the distal end of the handle housing via a rotating head assembly, and the slender body assembly defines a longitudinal axis direction.

[0021] The present invention also provides a manual reset unit adapted for surgical instruments, comprising a reset transmission assembly extending along a first direction, wherein a transmission input end of the reset transmission assembly is operably engaged with a reset wrench, and a transmission output end of the manual reset unit is operably engaged with a drive assembly of the surgical instrument. The manual reset unit cooperates with the reset wrench to drive the drive assembly to reset.

[0022] In some embodiments of the present invention, the reset transmission assembly includes a reset trigger rod, which is slidably accommodated in the mounting housing and can be driven to move between a first position and a second position; when the reset trigger rod is in the first position, the reset trigger rod is in transmission engagement with the drive assembly; when the reset trigger rod is in the second position, the reset trigger rod is separated from the drive assembly.

[0023] In some embodiments of the present invention, the reset transmission assembly further includes a reset elastic member, which acts on the reset trigger rod and is suitable for providing a biasing force to the reset trigger rod to keep it in the first position.

[0024] In some embodiments of the present invention, the reset transmission assembly also includes an adjusting member fixedly connected to the proximal end of the mounting shell, the proximal end of the adjusting member is suitable for transmission engagement with the reset wrench, the distal end of the adjusting member is transmission connected to the reset trigger rod, and the reset elastic member is located between the adjusting member and the reset trigger rod.

[0025] Some embodiments of the present invention further include a motor switch triggering portion. When the manual reset unit is engaged with the power unit, the motor switch triggering portion is suitable for triggering a control button of the surgical instrument to turn off the drive motor of the drive assembly.

[0026] The technical effects of the present invention are described in detail in the specific implementation method section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention, wherein:

[0028] Figure 1 It is a schematic diagram of the overall structure of a surgical instrument in one embodiment of the present invention;

[0029] Figure 2 This is a structural schematic diagram of an adapter unit and a power unit in an embodiment of the present application in a connected state;

[0030] Figure 3 An exploded diagram of an adaption unit in an embodiment of the present application;

[0031] Figure 4This is a schematic diagram of the structure of a power unit in one embodiment of the present application;

[0032] Figure 5 This is a schematic diagram of the structure of a power unit in one embodiment of the present application after the driving surgery is removed;

[0033] Figure 6 This is a positional relationship diagram of a manual reset unit, a reset wrench, and an adapter unit in an embodiment of the present application;

[0034] Figure 7 This is a diagram showing the coordination relationship between a manual reset unit, a reset wrench and a power unit in one embodiment of the present application;

[0035] Figure 8 This is a cross-sectional view of the cooperation between the manual reset unit, the reset wrench and the power unit in one embodiment of the present application;

[0036] Fig. 9 This is a diagram showing the coordination relationship between a manual reset unit, a reset wrench and a power unit in one embodiment of the present application;

[0037] Fig.10 This is a structural schematic diagram of a manual reset unit in an embodiment of the present application;

[0038] Fig.11 A cross-sectional view of a manual reset unit in one embodiment of the present application;

[0039] Fig.12 An exploded view of a manual reset unit in one embodiment of the present application;

[0040] Fig.13 This is a positional relationship diagram of a manual reset unit, a protective cover, and an adapter unit in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] In various embodiments of the present invention, the “distal end / side” refers to the end of the surgical instrument that is away from the operator when being operated, and the “proximal end / side” refers to the end / side of the surgical instrument that is close to the operator when being operated.

[0046] The following is a specific embodiment of the surgical instrument. Generally speaking, the embodiment of the surgical instrument described herein is an endoscopic surgical cutting and stapling instrument. However, it should be noted that the surgical instrument can also be a non-endoscopic surgical cutting and stapling instrument, such as an open surgical instrument for open surgery.

[0047] Specifically, Figure 1 A specific embodiment of the surgical instrument provided by the present application is shown, and the surgical instrument 100 includes an adapter unit 20, a disposable end effector assembly 30, and a reusable power unit 10. The end effector assembly 30 is used to operate tissue to perform specific surgical operations, such as clamping, suturing / anastomosis, cutting and other surgical operations on tissue; the power unit 10 is used to drive the end effector assembly 30 to perform clamping, suturing / anastomosis, cutting and other actions, and the adapter unit 20 is used to transmit the driving force of the power unit 10 to the end effector assembly 30.

[0048] Reference Figure 1As shown, the end effector assembly 30 includes a staple cartridge assembly 31 and a staple anvil assembly 32, and the staple cartridge assembly 31 and the staple anvil assembly 32 can move relative to each other to close the jaws and clamp the tissue jaws. In a specific embodiment, the staple anvil assembly 32 of the end effector assembly 30 can be operably pivoted toward the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are closed to clamp the tissue; the staple anvil assembly 32 is pivoted in a direction away from the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release the tissue. As an alternative embodiment, the staple cartridge assembly 31 of the end effector assembly 30 can be operably pivoted toward the staple anvil assembly 32 until the jaws of the end effector assembly 30 are closed to clamp the tissue; and the staple cartridge assembly 31 is operably pivoted in a direction away from the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release the tissue. Furthermore, a movable firing member for performing surgical actions is provided in the end execution assembly 30, and the firing member can be operated to perform reciprocating motion. For example, when the firing member is driven to move from the proximal end to the distal end, a corresponding surgical operation is performed, such as cutting and stapling tissue.

[0049] like Figure 2 As shown, the adapter unit 20 includes a handle housing 21 suitable for the operator to hold and an elongated body assembly 22 connected to the distal end of the handle housing 21 through a rotating head assembly 23. The handle housing 21 is generally T-shaped as a whole, including a main body extending along the longitudinal axis C and a gripping portion extending along a direction substantially perpendicular to the longitudinal axis C or inclined at a certain angle relative to the longitudinal axis C. The installation space of the power unit 10 is formed in the handle housing 21. An operating portion 213 is provided on the handle housing 21, and a push-twist and / or button structure is provided on the operating portion 213. The user performs the closing and / or firing action by operating the push-twist or button on the operating portion 213. The handle housing 21 includes a handle body 211 with a accommodating chamber and a handle cover 212 located on the upper side of the handle body 211. The handle cover 212 and the handle body 211 are connected by snap-fit ​​connection or other detachable connection methods. When the two are connected and closed, a sterile shell can be formed for enclosing the power unit 10 therein. The distal end of the handle housing 21 abuts against the proximal side of the rotating head assembly 23, so that the power unit 10 is located entirely inside the handle housing 21, so that the surgical instrument forms a sterile outer surface. In this way, through the arrangement of the handle housing 21, a sterile barrier can be arranged between the power unit 10 and the external environment, so as to prevent the contaminated power unit 10 from being exposed to the surgical environment and causing contamination, thereby achieving the reuse of the contaminated power unit 10 and reducing the surgical cost.

[0050] It is understandable that the handle housing 21 can also be implemented in many other ways. For example, two shielding shells that can be assembled and disassembled on the left and right or assembled and disassembled on the front and back can be used to form an installation space for accommodating the power unit 10, which will not be repeated here.

[0051] like Figure 2 , Figure 3 As shown, the proximal end of the handle cover 212 is pivotally connected to the proximal end of the handle body 211, and the distal end of the handle cover 212 is detachably connected to the distal end of the handle body 211 by means of a snap connection. The one-side pivot connection and the one-side snap connection can avoid the handle cover 212 from being separated from the handle body 211, thereby increasing the risk of bacteria. It is understandable that in other alternative embodiments, the pivot position and snap connection position of the handle cover 212 and the handle body 211 can be different. Figure 2 The illustrated embodiment is reversed or arranged in the left and right directions of the handle housing 21 .

[0052] like Figure 2 , Figure 3 As shown, the elongated body assembly 22 is in the shape of an elongated tube as a whole, and includes a tubular housing 223, which defines a longitudinal axis C; a transmission rod is arranged in the tubular housing 223, which is used to transmit the driving force of the power unit 10 to the end execution assembly 30. In some embodiments, the adapter unit 20 includes two sets of transmission rods, namely a firing transmission rod 221 and a bending transmission rod 222; a rotating head assembly 23 is arranged at the proximal side of the elongated body assembly 22, which can drive the elongated body assembly 22 to rotate relative to the power unit 10 around the longitudinal axis C, and the rotating head assembly 23 includes a rotating head housing 231, and an adapting joint 24 for engaging with the power unit 10 is arranged at the proximal side thereof, so as to realize a reliable transmission connection between the two parts. The proximal part of the transmission rod in the adapter unit 20 extends outward from the proximal end surface of the rotating head housing 231, so as to be operably engaged with the driving assembly in the power unit 10.

[0053] like Figure 4 , Figure 5As shown, the power unit 10 includes a driving part and a power storage device 14 for supplying power to the driving part. The driving part includes a driving housing 11 and a driving component and a control component located in the driving housing 11. A mounting bracket 15 is provided in the driving housing 11, and the driving component and the control component are both mounted on the mounting bracket 15. The power storage device 14 is a rechargeable battery, which is detachably connected to the lower side of the driving housing 11 and is electrically connected to the control component inside the driving housing. A power coupling portion 17 is provided at the far end of the power unit 10, and the power coupling portion 17 is used to cooperate with the adapter coupling portion 24 of the adapter unit 20, so as to realize a reliable connection between the power unit 10 and the housing of the adapter unit 20 on the one hand, and to make the drive output end in the power unit 10 engage with the transmission input end in the adapter unit 20 on the other hand, so as to realize a reliable transmission connection of the driving force.

[0054] like Figure 5 As shown, the drive assembly includes a firing drive assembly 12 and a bending drive assembly 13, wherein the output end of the firing drive assembly 12 drives the firing transmission rod 221 of the slender body assembly 22, thereby driving the firing member of the end actuator assembly 30 to perform reciprocating motion, thereby realizing the closing and opening operations of the jaws of the end actuator assembly 30, and the cutting and stapling operations of the tissue clamped in the jaws. The output end of the bending drive assembly 13 drives the bending transmission rod 222 of the slender body assembly 22, thereby driving the bending member of the end actuator assembly 30 to perform reciprocating motion, thereby realizing the bending operation of the end actuator assembly 30 relative to the slender body assembly 22.

[0055] The structures of the firing drive assembly 12 and the bending drive assembly 13 are basically the same, and they respectively include a driving output rod as the output component of the driving assembly and a driving motor, a driving gear set and a screw nut assembly that are transmission-connected to the driving output rod; the driving gear set includes a driving gear and a driven gear that are meshingly connected; the screw nut assembly includes a transmission screw connected to the driven gear and a transmission nut threadedly connected to the transmission screw, the driving output rod is connected to the transmission nut, and the rotational power of the driving motor is converted into a linear motion of the driving output rod along its axial direction through the driving gear set and the screw nut assembly.

[0056] Specifically, Figure 5As shown, the firing drive assembly 12 includes a firing drive motor 122 and a firing drive gear set, wherein the firing drive gear set includes a firing active gear 123 that is transmission-connected to the output shaft of the firing drive motor 122 and a firing driven gear 124 that is transmission-connected to the firing drive screw 125; the firing driven gear 124 is fixedly connected to the firing drive screw 125, and the firing drive screw 125 is provided with a firing drive nut 126 to form a screw nut mechanism, and the firing drive output rod 121 is fixedly connected to the firing drive nut 126. The firing drive motor 122 rotates to drive the firing active gear 123 to rotate, and the firing drive gear set meshes with the transmission to drive the firing drive screw 125 to rotate, so that the firing drive nut 126 located thereon moves along the axis direction of the firing drive screw 125, thereby driving the firing drive output rod 121 to move in a direction parallel to the longitudinal axis direction. Similarly, the bending drive assembly 13 includes a bending drive motor 132 and a bending drive gear set, wherein the bending drive gear set includes a bending driving gear 133 that is transmission-connected to the output shaft of the bending drive motor 132 and a bending driven gear 134 that is transmission-connected to the bending transmission screw 135; the bending driven gear 134 is fixedly connected to the bending transmission screw 135, and the bending transmission screw 135 is provided with a bending transmission nut 136 to form a screw nut mechanism, and the bending drive output rod 131 is fixedly connected to the bending transmission nut 136. The rotation of the bending drive motor 132 can drive the bending driving gear 133 to rotate, and the meshing transmission of the bending drive gear set drives the bending transmission screw 135 to rotate, so that the bending transmission nut 136 located thereon moves along the axial direction of the bending transmission screw 135, thereby driving the bending drive output rod 131 to move in a direction parallel to the longitudinal axial direction.

[0057] It is understandable that in an alternative embodiment, the drive assembly may only include a set of firing drive assemblies 12 to provide a driving force for driving the surgical instrument to complete closing, bending and retracting operations, and driving the surgical instrument to complete the bending operation is achieved through a manual bending mechanism of the transmission.

[0058] Specifically, Figure 5As shown, the drive motor is fixedly connected to the mounting bracket 15, and the output shaft of the drive motor extends toward the proximal end in a direction parallel to the longitudinal axis. The drive gear set is located in the proximal area of ​​the drive housing 11, and the transmission screw is rotatably connected to the mounting bracket 15 through a thrust bearing. The mounting bracket 15 is also provided with a limit plate for limiting the rotation of the transmission nut, and the limit plate includes a firing limit plate 128 for limiting the rotation of the firing transmission nut 126, and a bending limit plate 138 for limiting the rotation of the bending transmission nut 136; the limit plate extends in the same direction as the transmission screw, and the transmission nut is provided with fins on both sides of the axis of the transmission screw, and the fins of the transmission nut stop on the limit plates on both sides of the transmission screw to allow the transmission nut to translate axially along the transmission screw.

[0059] like Figure 7 As shown, the control assembly includes a main controller 18 and a control circuit board 16. The control circuit board 16 includes a first circuit board 161 and a second circuit board 162 which are electrically connected to each other. The first circuit board 161 is installed on the upper side of the mounting bracket 15 as the main control circuit board 16. The main controller 18 is installed on the first circuit board 161. The second circuit board 162 is installed on the lower side of the mounting bracket 15 and is electrically connected to the power storage device 14. The second circuit board 162 is used to control and manage the power storage device 14, such as boosting and reducing the voltage of the power storage battery. The first circuit board 161 faces upward, and a display device 19 of the instrument status is also provided on its upper surface, which is used to display the current control status information of the surgical instrument, such as the magnitude of the firing force, the bending angle and other information. It can be understood that the part of the area of ​​the drive housing 11 corresponding to the display device 19 is a transparent area. The second circuit board 162 is also provided with a control unit 165 for controlling the action of the driving component, such as a firing drive button, a bending drive button, a firing safety switch, etc. Since the second circuit board 162 is located on the lower side of the mounting bracket 15, it corresponds to the gripping portion of the handle housing 21, which is convenient for the operator to operate.

[0060] Since the surgical instrument 100 is driven by a motor, there is a certain risk of failure of the driving motor. In order to deal with the risk of motor failure, refer to Figure 6-Figure 9As shown, the surgical instrument 100 is also provided with a manual reset unit 50 that enables the operator to manually operate the surgical instrument 100 to return it to a state where it can be safely withdrawn from the human body. The manual reset unit 50 is suitable for shutting down the drive motor and releasing the transmission connection between the drive motor and its transmission assembly when the drive motor fails. Further, the manual reset unit 50 is also used to cooperate with the reset wrench 60 to manually reset the transmission rod to the initial state so that the surgical instrument 100 can be smoothly removed from the patient's body. For example, by operating the reset wrench 60 to operate the transmission rod in the slender body assembly 22 to return to the initial position, the firing drive output rod 121 and the bending drive output rod 131 are adjusted to the initial state, that is, in the end execution assembly 30, the cutting knife controlled by the firing member is at the most proximal end of the end execution assembly 30, and the end execution assembly 30 extends along the longitudinal axis direction.

[0061] like Figure 6 , Figure 4 As shown, the proximal end of the handle housing 21 of the adapter unit 20 is provided with a first plug interface 214, and the proximal end of the drive housing 11 of the power unit 10 is provided with a second plug interface 112. In order to realize the aseptic operation of the reset wrench 60, the manual reset unit 50 is a sterile disposable component, which is detachably connected to the power unit 10 along the first plug interface 214 of the handle housing 21 and the second plug interface 112 of the drive housing 11. The transmission input end of the manual reset unit 50 is operably connected to the reset wrench 60, and the transmission output end of the manual reset unit 50 is operably connected to the drive assembly. The manual reset unit 50 cooperates with the reset wrench 60 to drive the drive assembly to reset. The use of the disposable manual reset unit 50 as a transition structure can prevent the reset wrench 60 from directly acting on the power unit 10 inside the drive housing 11, and realize the aseptic operation of the manual reset step.

[0062] Reference Figure 7 As shown, the manual reset unit 50 includes a mounting shell 51 and a reset transmission assembly installed on the inner side thereof. In order to match the firing drive assembly 12 and the bending drive assembly 13, the manual reset unit 50 includes a firing reset transmission assembly 52 for matching with the firing drive assembly 12, and a bending reset transmission assembly 53 for matching with the bending drive assembly 13. Since the structures of the two are consistent, the structure of the manual reset unit 50 is described in detail below without distinguishing between the firing reset transmission assembly 52 and the bending reset transmission assembly 53.

[0063] like Figure 7As shown, the proximal end of the reset transmission assembly is suitable for cooperating with the reset wrench 60 to achieve a transmission connection, and the distal end of the reset transmission assembly is suitable for cooperating with the transmission screw to achieve a transmission connection, so as to transmit the torque applied by the operator to the reset wrench 60 to the transmission screw so that the transmission nut threaded thereon is reset to the initial position along its axis.

[0064] Reference Figure 8 , Figure 10-12 As shown, the reset transmission assembly includes a first reset trigger rod 521 and a second reset trigger rod 531. Specifically, it can be understood that a variety of transmission connection methods can be used between the first reset trigger rod 521, the second reset trigger rod 531, the transmission screw and the reset wrench 60. For example, in an optional embodiment, the proximal end of the transmission screw extends to the proximal end surface of the drive housing 11 and is sealed with the second plug interface 112. The proximal end of the firing transmission screw 125 is provided with a first plug groove 125a, and the proximal end of the bending transmission screw 135 is provided with a second plug groove 135a. The distal end of the first reset trigger rod 521 is plugged into the first plug groove 125a, and the distal end of the second reset trigger rod 531 is plugged into the second plug groove 135a. In order to realize the transmission connection between the first reset trigger rod 521, the second reset trigger rod 531 and the firing transmission screw 125, the bending transmission screw 135, the first plug-in slot 125a, the second plug-in slot 135a are formed into a polygonal slot body, for example, a slot body structure with a triangular cross section, and the distal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are correspondingly formed into a polygonal rod body structure, so that the first reset trigger rod 521 and the second reset trigger rod 531 drive the transmission screw to rotate. Similarly, the proximal sides of the first reset trigger rod 521 and the second reset trigger rod 531 can also be formed into a polygonal plug-in slot form, suitable for cooperating with the polygonal rod body of the reset wrench 60 to realize transmission connection, and can also realize transmission connection with the reset wrench 60 by cooperating with other components.

[0065] In other alternative embodiments, the distal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are formed into a polygonal sleeve structure, and the proximal end of the transmission screw is correspondingly constructed in the form of a polygonal rod body, and the first reset trigger rod 521 and the second reset trigger rod 531 are sleeved on the proximal polygonal rod body of the transmission screw. At the same time, the proximal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are also formed into a polygonal sleeve structure, and the end of the reset wrench 60 is formed into a polygonal rotating head structure suitable for being inserted into the sleeve structure. By providing the transition structure of the first reset trigger rod 521 and the second reset trigger rod 531, it is possible to prevent the reset wrench 60 from directly acting on the transmission screw inside the drive housing 11, thereby achieving aseptic operation of the manual reset step.

[0066] In an optional embodiment, the first reset trigger rod 521 and the second reset trigger rod 531 are slidably connected in the mounting cavity of the mounting shell 51. The distal end surface of the mounting shell 51 is provided with a through hole, and the first reset trigger rod 521 and the second reset trigger rod 531 can pass through the through hole to the outside of the mounting shell 51. The first reset trigger rod 521 and the second reset trigger rod 531 can be driven to move between a first position and a second position; when the first reset trigger rod 521 and the second reset trigger rod 531 are located in the first position, the first reset trigger rod 521 and the second reset trigger rod 531 are in transmission engagement with the drive assembly; when the first reset trigger rod 521 and the second reset trigger rod 531 are located in the second position, the first reset trigger rod 521 and the second reset trigger rod 531 are separated from the drive assembly.

[0067] like Figure 8 , Figure 10-12 As shown, the reset transmission assembly further includes a first reset elastic member 522 and a second reset elastic member 532 disposed in the mounting housing 51. The first reset elastic member 522 acts on the first reset trigger rod 521, and is suitable for providing a biasing force to keep the first reset trigger rod 521 in the first position; the second reset elastic member 532 acts on the second reset trigger rod 531, and is suitable for providing a biasing force to keep the second reset trigger rod 531 in the first position. In the initial position, the first reset elastic member 522 and the second reset elastic member 532 keep the first reset trigger rod 521 and the second reset trigger rod 531 in a position that can cooperate with the transmission screw.

[0068] In order to improve the transmission engagement reliability between the first reset trigger rod 521, the second reset trigger rod 531 and the transmission screw rod, as shown in FIG. Figure 8 , Figure 10-12As shown, the reset transmission assembly also includes a first adjusting member 523 and a second adjusting member 533 fixedly arranged at the proximal end of the mounting shell 51, the proximal ends of the first adjusting member 523 and the second adjusting member 533 are suitable for transmission engagement with the reset wrench 60, the distal ends of the first adjusting member 523 and the second adjusting member 533 are respectively transmission connected with the first reset trigger rod 521 and the second reset trigger rod 531, the first reset elastic member 522 is located between the first adjusting member 523 and the first reset trigger rod 521, and the second reset elastic member 532 is located between the second adjusting member 533 and the second reset trigger rod 531. When the manual reset unit 50 is engaged with the power unit 10, the first reset trigger rod 521, the second reset trigger rod 531 and the engaging end structure of the transmission screw are misaligned along the circumferential direction, that is, the first reset trigger rod 521, the second reset trigger rod 531 cannot be inserted into the first insertion groove 125a, the second insertion groove 135a of the transmission screw, the first reset trigger rod 521, the second reset trigger rod 531 overcomes the elastic force of the first reset elastic member 522, the second reset elastic member 532 and moves toward the proximal end under the action of the proximal side of the transmission screw. When the reset wrench 60 is inserted into the first adjusting member 523 and the second adjusting member 533 and drives them to rotate, the first reset trigger rod 521 and the second reset trigger rod 531 rotate to a set angle accordingly. At this time, the first reset trigger rod 521 and the second reset trigger rod 531 match the positions of the first plug-in slot 125a and the second plug-in slot 135a. Under the action of the first reset elastic member 522 and the second reset elastic member 532, they can move distally to a position engaged with the transmission screw to further realize manual reset of the drive assembly.

[0069] The first adjusting member 523 and the second adjusting member 533 are provided with a polygonal first plug-in hole 523a and a second plug-in hole 533a, the proximal end of the first reset trigger rod 521 can be slidably inserted into the first plug-in hole 523a of the first adjusting member 523, and the proximal end of the second reset trigger rod 531 can be slidably inserted into the second plug-in hole 533a of the second adjusting member 533, the distal ends of the first plug-in hole 523a and the second plug-in hole 533a are suitable for engaging the reset wrench 60, so as to realize reliable transmission connection between the reset wrench 60 and the first adjusting member 523 and the second adjusting member 533, and between the first adjusting member 523 and the second adjusting member 533 and the first reset trigger rod 521 and the second reset trigger rod 531.

[0070] The first adjusting member 523, the second adjusting member 533 and the first reset trigger rod 521, the second reset trigger rod 531 are all constructed in the form of a shaft with a step. The first reset elastic member 522, the second reset elastic member 532 is a compression spring, which is sleeved on the first adjusting member 523, the second adjusting member 533 and the shaft with a smaller outer diameter of the first reset trigger rod 521, the second reset trigger rod 531, and one end of it abuts against the step surface of the first adjusting member 523, the second adjusting member 533, and the other end abuts against the step surface of the first reset trigger rod 521, the second reset trigger rod 531.

[0071] In order to shut down the drive motor when a drive component fails so that the drive component can be reset manually, refer to Figure 8 , Fig. 9 As shown, the power unit 10 is also provided with a control button 164 for controlling the start / stop of the drive motor. By triggering the control button 164, for example, pressing the control button 164, the two sets of drive motors can be powered off at the same time.

[0072] In an optional embodiment, the control button 164 is disposed at the proximal end of the drive housing 11 and exposed from the drive housing 11. Figure 8 , Figure 10-12 As shown, the manual reset unit 50 further includes a motor switch triggering portion 54. When the manual reset unit 50 is coupled to the power unit 10, the motor switch triggering portion 54 is adapted to trigger the control button 164 to turn off the drive motor. Specifically, the motor switch triggering portion 54 is configured as a protruding structure integrally formed on the far side of the mounting housing 51. When the manual reset unit 50 is coupled to the power unit 10, the control button 164 is pressed to turn off the drive motor for further manual reset operations.

[0073] Specifically, in order to ensure that the manual reset unit 50 is reliably connected to the adapter unit 20 and then engaged with the power unit 10, the outer contour of the mounting shell 51 of the manual reset unit 50 matches the shape of the first plug-in interface 214 of the handle shell 21, that is, the mounting shell 51 can be tightly plugged into the first plug-in interface 214 of the handle shell 21, and the operator does not need to hold the manual reset unit 50, which facilitates the operator to perform manual reset operations.

[0074] Furthermore, in a specific implementation mode, referring to Fig.13 , Fig.11 and Figure 8As shown, at least one positioning rib 214a is provided in the middle area of ​​the first plug interface 214, and at least one limiting clamping portion 511 is correspondingly provided at the distal end of the mounting shell 51 of the manual reset unit 50, and the limiting clamping portion 511 cooperates with the positioning rib 214a to realize the connection between the manual reset unit 50 and the handle shell 21. For example, two positioning ribs 214a extending in the width direction are provided on the first plug interface 214, the mounting shell 51 is made of a plastic material capable of partial elastic deformation, and the limiting clamping portion 511 is configured as a clamping groove structure formed on the distal side of the mounting shell 51.

[0075] like Fig.13 As shown, in a specific embodiment of the surgical instrument 100, the adapter unit 20 also includes a protective cover 26 detachably connected to the first plug interface 214 of the handle housing 21. When the manual reset unit 50 is not engaged with the power unit 10, the protective cover 26 closes the handle housing 21, which can prevent the proximal end of the power unit 10 from being exposed to the first plug interface 214 of the handle housing 21 during normal surgery, posing a risk of bacterial contamination.

[0076] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that: include: An adapter unit, comprising a handle housing, wherein a first plug interface is provided at a proximal end of the handle housing; A reusable power unit comprises a drive housing and a drive assembly contained in the drive housing, wherein the drive assembly is adapted to provide a driving force, and a second plug interface is provided at a proximal end of the drive housing; A manual reset unit is detachably connected to the power unit along the first plug interface of the handle housing and the second plug interface of the drive housing. The manual reset unit includes a mounting housing and a reset transmission assembly mounted thereon. The transmission input end of the reset transmission assembly is operably connected to the reset wrench for transmission, and the transmission output end of the reset transmission assembly is operably connected to the drive assembly for transmission. The manual reset unit cooperates with the reset wrench to drive the drive assembly to reset. The driving assembly includes a driving motor, and the power unit is also provided with a control button for controlling the start / shutdown of the driving motor. The manual reset unit also includes a motor switch triggering part. When the manual reset unit is engaged with the power unit, the motor switch triggering part is suitable for triggering the control button to shut down the driving motor.

2. The surgical instrument according to claim 1, characterized in that The reset transmission assembly comprises a reset trigger rod, the proximal end of the reset trigger rod is suitable for transmission engagement with the reset wrench, and the distal end of the reset trigger rod is suitable for transmission engagement with the drive assembly.

3. The surgical instrument according to claim 2, characterized in that The reset trigger rod can be slidably accommodated in the mounting housing, and can be driven to move between a first position and a second position; when the reset trigger rod is located at the first position, the reset trigger rod is in transmission engagement with the drive assembly; when the reset trigger rod is located at the second position, the reset trigger rod is separated from the drive assembly.

4. The surgical instrument according to claim 3, characterized in that The reset transmission assembly also includes a reset elastic member, which acts on the reset trigger rod and is suitable for providing a biasing force to the reset trigger rod to keep it in the first position.

5. The surgical instrument according to claim 2, characterized in that: The driving assembly includes a driving output rod, a driving motor drivingly connected to the driving output rod, a driving gear set and a screw nut assembly; the driving gear set includes a driving gear and a driven gear in meshing connection; the screw nut assembly includes a transmission screw connected to the driven gear and a transmission nut threadedly connected to the transmission screw, the driving output rod is connected to the transmission nut, and the distal end of the reset trigger rod is suitable for being transmission-connected to the transmission screw.

6. The surgical instrument according to claim 5, characterized in that The proximal end of the transmission screw rod is provided with an inserting groove, and when the manual reset unit is coupled to the power unit, the distal end of the reset trigger rod is inserted into the inserting groove.

7. The surgical instrument according to claim 6, characterized in that The proximal end of the transmission screw extends to the proximal end surface of the drive housing and is sealed and connected to the second plug interface.

8. The surgical instrument according to claim 4, characterized in that The reset transmission assembly also includes an adjusting member fixedly connected to the proximal end of the mounting shell, the proximal end of the adjusting member is suitable for transmission engagement with the reset wrench, the distal end of the adjusting member is transmission connected to the reset trigger rod, and the reset elastic member is located between the adjusting member and the reset trigger rod.

9. The surgical instrument according to claim 8, characterized in that A polygonal plug-in through hole is arranged in the adjusting member, the proximal end of the reset trigger rod can be slidably plugged into the plug-in through hole of the adjusting member, and the distal end of the plug-in through hole is suitable for engaging the reset wrench.

10. The surgical instrument according to claim 1, characterized in that The drive assembly includes a firing drive assembly and a bending drive assembly, and the manual reset unit includes a firing reset transmission assembly and a bending reset transmission assembly. The firing reset transmission assembly is in transmission engagement with the firing drive assembly, and the bending reset transmission assembly is in transmission engagement with the bending drive assembly.

11. The surgical instrument according to claim 1, characterized in that The outer contour of the mounting shell of the manual reset unit matches the shape of the first plug-in interface of the handle shell.

12. The surgical instrument according to claim 11, characterized in that At least one positioning rib is provided in the middle area of ​​the first plug interface, and at least one limiting clamping part is provided at the distal end of the mounting shell of the manual reset unit, and the limiting clamping part cooperates with the positioning rib to realize the connection between the manual reset unit and the handle shell.

13. The surgical instrument according to claim 1, characterized in that It also includes a protective cover detachably connected to the first plug interface of the handle housing, and when the manual reset unit is not engaged with the power unit, the protective cover closes the handle housing.

14. The surgical instrument according to claim 1, characterized in that The adapter unit further comprises an elongated body assembly connected to the distal end of the handle housing via a rotating head assembly, wherein the elongated body assembly defines a longitudinal axis direction.

15. A manual resetting unit adapted for a surgical instrument, characterized in that: The manual reset unit comprises a mounting housing and a reset transmission assembly mounted thereon and extending along a first direction, wherein a transmission input end of the reset transmission assembly is operable to be in transmission engagement with a reset wrench, a transmission output end of the manual reset unit is operable to be in transmission engagement with a driving assembly of the surgical instrument, and the manual reset unit cooperates with the reset wrench to drive the driving assembly to reset; The manual reset unit further comprises a motor switch triggering portion. When the manual reset unit is engaged with the surgical instrument, the motor switch triggering portion is adapted to trigger a control button of the surgical instrument to turn off the driving motor of the driving assembly.

16. The manual reset unit according to claim 15, characterized in that: The reset transmission assembly includes a reset trigger rod, which is slidably accommodated in a mounting housing and can be driven to move between a first position and a second position; when the reset trigger rod is located at the first position, the reset trigger rod is in transmission engagement with the drive assembly; when the reset trigger rod is located at the second position, the reset trigger rod is separated from the drive assembly.

17. The manual reset unit according to claim 16, characterized in that: The reset transmission assembly also includes a reset elastic member, which acts on the reset trigger rod and is suitable for providing a biasing force to the reset trigger rod to keep it in the first position.

18. The manual reset unit according to claim 17, characterized in that: The reset transmission assembly also includes an adjusting member fixedly connected to the proximal end of the mounting shell, the proximal end of the adjusting member is suitable for transmission engagement with the reset wrench, the distal end of the adjusting member is transmission connected to the reset trigger rod, and the reset elastic member is located between the adjusting member and the reset trigger rod.

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