Surgical instrument and manual reset unit for adapting a surgical instrument

Abstract

The application discloses a surgical instrument and a manual reset unit matched with the surgical instrument. The surgical instrument comprises a matched unit, a handle shell of the matched unit, a first plug interface arranged at a proximal end of the handle shell, a reusable power unit, a driving shell of the power unit, a driving assembly accommodated in the driving shell, a second plug interface arranged at a proximal end of the driving shell, and a manual reset unit which is detachably connected to the power unit along the first plug interface of the handle shell and the second plug interface of the driving shell. The manual reset unit comprises a reset transmission assembly, a transmission input end of the reset transmission assembly is operatively connected with a reset wrench transmission, and a transmission output end of the reset transmission assembly is operatively connected with the driving assembly transmission. The surgical instrument is safe and reliable in manual reset, and realizes sterile contact with the outside during the manual reset process.

Description

[0001] This case is a divisional application of patent application No. 202510084409.4, filed on January 20, 2025, entitled "A Surgical Instrument and a Manual Reset Unit Adapted to a Surgical Instrument". Technical Field

[0002] This invention relates to the field of surgical instruments, and particularly to a clamping, cutting, and anastomotic surgical instrument. Background Technology

[0003] Linear clamping, cutting, and anastomosing surgical instruments enable tissue clamping, suturing / anastomosis, and cutting during surgical procedures. With advancements in medical device technology, electrically powered surgical anastomosis instruments are evolving towards greater intelligence, leading to a significant increase in instrument costs. In recent years, to reduce the cost of surgical instruments, reusable surgical instruments with at least some reusable components have received increasing attention.

[0004] For partially reusable electrically powered surgical anastomosis instruments, the reusable or unsterilized portion is typically the handle assembly with a costly control and power unit, while the disposable or sterilized portion is usually the elongated body assembly and the end effector assembly. These instruments typically achieve aseptic isolation of the reusable portion by covering the reusable or unsterilized handle portion with a disposable or sterilized drive housing. Because fully electric anastomoses have a certain risk of motor and battery failure during use, they require corresponding emergency procedures. This usually requires the operator to manually reset the drive assembly to a position suitable for removal from the patient, such as resetting the end effector assembly to align with the extension direction of the elongated body assembly for easy removal, or resetting the firing mechanism to its initial position. For partially reusable electrically powered surgical anastomosis instruments, designing a manual reset structure that ensures safe and convenient engagement and disengagement while avoiding aseptic contact with disposable components during manual reset is a technical challenge faced by those skilled in the art. Summary of the Invention

[0005] Therefore, the present invention proposes a surgical instrument that is safe and reliable for manual repositioning and allows for sterile contact with the external environment during the manual repositioning process.

[0006] To address the aforementioned technical problems, the present invention provides the following technical solution: A surgical instrument includes: an adapter unit comprising a handle housing having a first insertion interface at its proximal end; a reusable power unit comprising a drive housing and a drive assembly housed within the drive housing, the drive assembly being adapted to provide driving force, the drive housing having a second insertion interface at its proximal end; and a manual reset unit detachably inserted into the first insertion interface of the handle housing and engaging with the power unit through the second insertion interface of the drive housing, the manual reset unit comprising a reset transmission assembly having a transmission input end operably engaged with a reset wrench and a transmission output end operably engaged with the drive assembly, the manual reset unit driving 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, the proximal end of which is adapted to drive engagement with the reset wrench, and the distal end of which is adapted to drive engagement with the drive assembly.

[0008] In some embodiments of the present invention, the manual reset unit includes a mounting housing, and the reset trigger rod is slidably accommodated within 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 engaged with the drive assembly; when the reset trigger rod is in the second position, the reset trigger rod is disengaged from the drive assembly.

[0009] In some embodiments of the present invention, the reset transmission assembly further includes a reset elastic element, which acts on the reset trigger rod and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

[0010] In some embodiments of the present invention, the drive assembly includes a drive output rod, a drive motor pulverizedly connected to the drive output rod, a drive gear set, and a lead screw and nut assembly; the drive gear set includes a driving gear and a driven gear meshing together; the lead screw and nut assembly includes a transmission lead screw connected to the driven gear and a transmission nut threadedly connected to the transmission lead screw, the drive output rod is connected to the transmission nut, and the distal end of the reset trigger rod is adapted to be pulverizedly connected to the transmission lead screw.

[0011] In some embodiments of the present invention, the proximal end of the transmission lead screw is provided with a plug-in groove, and when the manual reset unit is engaged with the power unit, the distal end of the reset trigger rod is adapted to the plug-in groove.

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

[0013] In some embodiments of the present invention, the reset transmission assembly further includes an adjusting member fixedly connected to the proximal end of the mounting housing, the proximal end of the adjusting member being adapted to engage with the reset wrench, the distal end of the adjusting member being connected to the reset trigger rod, and the reset elastic member being located between the adjusting member and the reset trigger rod.

[0014] In some embodiments of the present invention, the adjusting member is provided with a polygonal insertion through hole, the proximal end of the reset trigger rod is slidably inserted into the insertion through hole of the adjusting member, and the distal end of the insertion through hole is adapted to engage the reset wrench.

[0015] In some embodiments of the present invention, the driving assembly includes a firing driving assembly and a turning driving assembly, and the manual reset unit includes a firing reset transmission assembly and a turning reset transmission assembly. The firing reset transmission assembly is drivenly engaged with the firing driving assembly, and the turning reset transmission assembly is drivenly engaged with the turning driving assembly.

[0016] In some embodiments of the present invention, the power unit is further provided with a control button for controlling the start / stop of the drive motor, and the manual reset unit further includes a motor switch triggering part. When the manual reset unit is engaged with the power unit, the motor switch triggering part is adapted to trigger 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 insertion interface of the handle housing.

[0018] In some embodiments of the present invention, at least one positioning rib is provided in the middle region of the first insertion interface, and at least one limiting snap-fit ​​part is provided at the far end of the mounting shell of the manual reset unit. The limiting snap-fit ​​part 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 that is detachably connected to a first plug-in interface of the handle housing, and the protective cover closes the handle housing when the manual reset unit is not engaged with the power unit.

[0020] In some embodiments of the present invention, the adapter unit further includes an elongated body assembly connected to the distal end of the handle housing via a rotating head assembly, the elongated body assembly defining a longitudinal axis direction.

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

[0022] In some embodiments of the present invention, the reset transmission assembly includes a reset trigger rod, which is slidably accommodated within 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 engaged with the drive assembly; when the reset trigger rod is in the second position, the reset trigger rod is disengaged from the drive assembly.

[0023] In some embodiments of the present invention, the reset transmission assembly further includes a reset elastic element, which acts on the reset trigger rod and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

[0024] In some embodiments of the present invention, the reset transmission assembly further includes an adjusting member fixedly connected to the proximal end of the mounting housing, the proximal end of the adjusting member being adapted to engage with the reset wrench, the distal end of the adjusting member being connected to the reset trigger rod, and the reset elastic member being located between the adjusting member and the reset trigger rod.

[0025] In some embodiments of the present invention, a motor switch trigger unit is also included. When the manual reset unit is engaged with the power unit, the motor switch trigger unit is adapted to trigger the control button of the surgical instrument to turn off the drive motor of the drive assembly.

[0026] The technical effects of the present invention will be explained in detail in the section on specific embodiments. Attached Figure Description

[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 purpose and advantages of the present invention, wherein: Figure 1 This is a schematic diagram of the overall structure of a surgical instrument in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the adapter unit and the power unit in the coupled state in one embodiment of this application; Figure 3 This is an exploded view of the adapter unit in one embodiment of this application; Figure 4 This is a schematic diagram of the power unit structure in one embodiment of this application; Figure 5This is a schematic diagram of the power unit structure after removing the drive sleeve in one embodiment of this application; Figure 6 This is a diagram showing the positional relationship between the manual reset unit, the reset wrench, and the adapter unit in one embodiment of this application. Figure 7 This is a diagram showing the cooperation relationship between the manual reset unit, the reset wrench, and the power unit in one embodiment of this application; Figure 8 This is a cross-sectional view showing the interaction of the manual reset unit, reset wrench, and power unit in one embodiment of this application. Figure 9 This is a diagram showing the cooperation relationship between the manual reset unit, the reset wrench, and the power unit in one embodiment of this application; Figure 10 This is a schematic diagram of the structure of the manual reset unit in one embodiment of this application; Figure 11 This is a cross-sectional view of the manual reset unit in one embodiment of this application; Figure 12 This is an exploded view of the manual reset unit in one embodiment of this application; Figure 13 This is a diagram showing the positional relationship between the manual reset unit, the protective cover, and the adapter unit in one embodiment of this application. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, 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.

[0032] In various embodiments of the present invention, "distal / side" refers to the end of the surgical instrument that is far from the operator during operation, while "proximal / side" refers to the end / side of the surgical instrument that is close to the operator during operation.

[0033] The following is a specific embodiment of the surgical instrument. Generally, the surgical instruments described herein are endoscopic surgical cutting and anastomosis instruments. However, it should be noted that the surgical instruments can also be non-endoscopic surgical cutting and anastomosis instruments, such as open surgical instruments used in open surgery.

[0034] Specifically, Figure 1 This application illustrates a specific embodiment of the surgical instrument 100 provided. 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 manipulate tissue to perform specific surgical operations, such as tissue clamping, suturing / anastomosis, and cutting. The power unit 10 drives the end-effector assembly 30 to perform clamping, suturing / anastomosis, and cutting actions. The adapter unit 20 transmits the driving force of the power unit 10 to the end-effector assembly 30.

[0035] Reference Figure 1As shown, the end effector 30 includes a cartridge assembly 31 and an anvil assembly 32, which are movable relative to each other to close the jaws and grip tissue. In one specific embodiment, the anvil assembly 32 of the end effector 30 is operably pivoted toward the cartridge assembly 31 until the jaws of the end effector 30 are closed to grip tissue; the anvil assembly 32 is pivoted toward a direction away from the cartridge assembly 31 until the jaws of the end effector 30 are opened to release tissue. Alternatively, the cartridge assembly 31 of the end effector 30 may be operably pivoted toward the anvil assembly 32 until the jaws of the end effector 30 are closed to grip tissue; and the cartridge assembly 31 may be operably pivoted toward a direction away from the cartridge assembly 31 until the jaws of the end effector 30 are opened to release tissue. Furthermore, a movable firing member for performing surgical actions is provided within the end-effector 30. The firing member can be operatively reciprocated. 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 anastomosis of tissue.

[0036] 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 via a rotating head assembly 23. The handle housing 21 is generally T-shaped, including a main body extending along a longitudinal axis C and a gripping portion extending approximately perpendicular to or at an angle relative to the longitudinal axis C. The handle housing 21 forms an installation space for the power unit 10. An operating part 213 is provided on the handle housing 21, featuring a push-button and / or button structure. The user performs closing and / or firing actions by manipulating the push-button or button on the operating part 213. The handle housing 21 includes a handle body 211 with a receiving 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 a snap-fit ​​connection or other detachable connection method. When closed, they form a sterile shell to enclose the power unit 10 within it. 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 entirely located inside the handle housing 21, forming a sterile outer surface for the surgical instrument. Thus, the handle housing 21 creates a sterile barrier between the power unit 10 and the external environment, preventing the contaminated power unit 10 from being exposed to the surgical environment and causing contamination, enabling the reuse of the sterile power unit 10, and reducing surgical costs.

[0037] It is understandable that the handle housing 21 can also be implemented in other ways. For example, it can be formed by using two shielding housings that can be assembled and detached on the left and right or assembled and detached in the front and back to form an installation space for accommodating the power unit 10, which will not be elaborated here.

[0038] 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, while the distal end of the handle cover 212 is detachably connected to the distal end of the handle body 211 via a snap-fit ​​connection. This one-sided pivoting and one-sided snap-fit ​​connection prevents the handle cover 212 from separating from the handle body 211, thus avoiding the risk of bacterial contamination. It is understood that in other alternative embodiments, the pivoting and snap-fit ​​connections of the handle cover 212 and the handle body 211 can be different from... Figure 2 The embodiments shown are reversed or positioned in the left-right direction of the handle housing 21.

[0039] like Figure 2 , Figure 3 As shown, the elongated body assembly 22 is generally elongated tubular, including a tubular outer shell 223 that defines a longitudinal axis C. A transmission rod is disposed within the tubular outer shell 223 for transmitting the driving force of the power unit 10 to the end actuation assembly 30. In some embodiments, the adapter unit 20 includes two sets of transmission rods: a firing transmission rod 221 and a bending transmission rod 222. A rotating head assembly 23 is disposed proximally on the elongated body assembly 22, which can drive the elongated body assembly 22 to rotate relative to the power unit 10 about the longitudinal axis C. The rotating head assembly 23 includes a rotating head shell 231, on its proximity having an adapter engagement portion 24 for engaging with the power unit 10 to achieve a reliable transmission connection between the two parts. The proximally portion of the transmission rod in the adapter unit 20 extends outward from the proximal end face of the rotating head shell 231 to operably engage with the drive assembly within the power unit 10.

[0040] like Figure 4 , Figure 5As shown, the power unit 10 includes a drive section and an energy storage device 14 that supplies power to the drive section. The drive section includes a drive housing 11 and drive components and control components located within the drive housing 11. A mounting bracket 15 is provided inside the drive housing 11, and the drive components and control components are mounted on the mounting bracket 15. The energy storage device 14 is a rechargeable battery, detachably connected to the lower side of the drive housing 11 and electrically connected to the control components inside the drive housing. A power engagement portion 17 is provided at the distal end of the power unit 10. The power engagement portion 17 is used to cooperate with the adaptation engagement portion 24 of the adaptation unit 20, achieving a reliable connection between the housings of the power unit 10 and the adaptation unit 20, and engaging the drive output terminal within the power unit 10 with the transmission input terminal within the adaptation unit 20 to achieve a reliable transmission connection of the driving force.

[0041] like Figure 5 As shown, the driving assembly includes a firing driving assembly 12 and a bending driving assembly 13. The output end of the firing driving assembly 12 drives the firing transmission rod 221 of the elongated body assembly 22, which in turn drives the firing member of the end actuation assembly 30 to reciprocate, thereby realizing the closing and opening operation of the jaws of the end actuation assembly 30, as well as the cutting and anastomosis operation of the tissue clamped in the jaws. The output end of the bending driving assembly 13 drives the bending transmission rod 222 of the elongated body assembly 22, which in turn drives the bending member of the end actuation assembly 30 to reciprocate, thereby realizing the bending operation of the end actuation assembly 30 relative to the elongated body assembly 22.

[0042] The firing drive assembly 12 and the bending drive assembly 13 have basically the same structure, each including a drive output rod as the output component of the drive assembly, and a drive motor, a drive gear set, and a lead screw and nut assembly that are connected to the drive output rod. The drive gear set includes a driving gear and a driven gear that are meshed together. The lead screw and nut assembly includes a transmission screw connected to the driven gear and a transmission nut threaded onto the transmission screw. The drive output rod is connected to the transmission nut. The rotational power of the drive motor is converted into linear motion of the drive output rod along its axial direction through the drive gear set and the lead screw and nut assembly.

[0043] Specifically, such as Figure 5As shown, the firing drive assembly 12 includes a firing drive motor 122 and a firing drive gear set. The firing drive gear set includes a firing drive gear 123 that is driven by the output shaft of the firing drive motor 122 and a firing driven gear 124 that is driven by 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, forming a screw-nut mechanism. The firing drive output rod 121 is fixedly connected to the firing drive nut 126. The rotation of the firing drive motor 122 drives the firing drive gear 123 to rotate, and the meshing transmission of the firing drive gear set drives the firing drive screw 125 to rotate, so that the firing drive nut 126 located thereon moves along the axial 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. Similarly, the bending drive assembly 13 includes a bending drive motor 132 and a bending drive gear set. The bending drive gear set includes a bending drive gear 133 that is driven by the output shaft of the bending drive motor 132 and a bending driven gear 134 that is driven by the bending drive screw 135. The bending driven gear 134 is fixedly connected to the bending drive screw 135, and the bending drive screw 135 is provided with a bending drive nut 136, forming a screw-nut mechanism. The bending drive output rod 131 is fixedly connected to the bending drive nut 136. The rotation of the bending drive motor 132 can drive the bending drive gear 133 to rotate, and the meshing transmission of the bending drive gear set can drive the bending drive screw 135 to rotate, so that the bending drive nut 136 located thereon moves along the axial direction of the bending drive screw 135, thereby driving the bending drive output rod 131 to move in a direction parallel to the longitudinal axis.

[0044] It is understood that, in alternative embodiments, the drive assembly may include only one set of firing drive assembly 12 to provide the driving force to drive the surgical instrument to complete the closing, bending and retraction reset operations, while the bending operation of the surgical instrument is achieved by a driven manual bending mechanism.

[0045] Specifically, such as Figure 5As shown, the drive motor is fixedly connected to the mounting bracket 15. The output shaft of the drive motor extends towards the proximal end in a direction parallel to the longitudinal axis. The drive gear set is located in the proximal region of the drive housing 11. The transmission screw is rotatably connected to the mounting bracket 15 through a thrust bearing. The mounting bracket 15 is also provided with a limiting plate to restrict the rotation of the transmission nut. The limiting plate includes a firing limiting plate 128 for restricting the rotation of the firing transmission nut 126 and a bending limiting plate 138 for restricting the rotation of the bending transmission nut 136. The limiting plate extends in the same direction as the transmission screw. The transmission nut is provided with fins on both sides of the axis of the transmission screw. The fins of the transmission nut abut against the limiting plates on both sides of the transmission screw to allow the transmission nut to translate axially along the transmission screw.

[0046] 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 electrically connected to each other. The first circuit board 161, serving as the main control circuit board 16, is mounted on the upper side of the mounting bracket 15. The main controller 18 is mounted on the first circuit board 161. The second circuit board 162 is mounted on the lower side of the mounting bracket 15 and is electrically connected to the energy storage device 14. The second circuit board 162 is used to control and manage the energy storage device 14, such as boosting or buckling the voltage of the battery. The first circuit board 161 faces upward, and its upper surface is also provided with an instrument status display device 19 for displaying the current control status information of the surgical instrument, such as the magnitude of the striking force and the bending angle. It is understood that a portion 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 part 165 for controlling the operation of the drive component, such as a drive button, a bend drive button, a safety switch, etc. Since the second circuit board 162 is located on the lower side of the mounting bracket 15, it corresponds to the grip part of the handle housing 21, which is convenient for the operator to operate.

[0047] Since the surgical instrument 100 is driven by a motor, there is a certain risk of motor failure. To address this risk, refer to... Figures 6-9As shown, the surgical instrument 100 is also equipped with a manual reset unit 50 that allows the operator to manually return the surgical instrument 100 to a position where it can be safely removed from the human body. The manual reset unit 50 is adapted to shut down the drive motor and release the transmission connection between the drive motor and its transmission components in the event of a drive motor failure. Furthermore, the manual reset unit 50 is also used in conjunction with a reset wrench 60 to manually reset the transmission rod to its 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, the transmission rod in the elongated body assembly 22 can be manually returned to its initial position, adjusting the firing drive output rod 121 and the bending drive output rod 131 to their initial states. That is, in the end-effector assembly 30, the cutting blade controlled by the firing member is located at the closest end of the end-effector assembly 30, and the end-effector assembly 30 extends along the longitudinal axis.

[0048] like Figure 6 , Figure 4 As shown, the adapter unit 20 has a first insertion interface 214 at the proximal end of the handle housing 21, and the power unit 10 has a second insertion interface 112 at the proximal end of the drive housing 11. To achieve aseptic operation of the reset wrench 60, the manual reset unit 50 is a sterile disposable component. It is detachably connected to the power unit 10 along the first insertion interface 214 of the handle housing 21 and the second insertion interface 112 of the drive housing 11. That is, the manual reset unit 50 is detachably inserted into the first insertion interface 214 of the handle housing 21 and passes through the second insertion interface 112 of the drive housing 11 to engage with the power unit 10. The transmission input end of the manual reset unit 50 is operably engaged with the reset wrench 60, and the transmission output end of the manual reset unit 50 is operably engaged with the drive assembly. The manual reset unit 50 drives the drive assembly to reset by cooperating with the reset wrench 60. The use of a disposable manual reset unit 50 as a transition structure avoids the reset wrench 60 from directly acting on the power unit 10 inside the drive housing 11, thus achieving aseptic operation of the manual reset step.

[0049] Reference Figure 7 As shown, the manual reset unit 50 includes a mounting housing 51 and a reset transmission assembly mounted inside it. 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 adapted to the firing drive assembly 12 and a bending reset transmission assembly 53 matched to the bending drive assembly 13. Since the two have the same structure, the structure of the manual reset unit 50 will be described in detail below without distinguishing between the firing reset transmission assembly 52 and the bending reset transmission assembly 53.

[0050] like Figure 7As shown, the proximal end of the reset transmission assembly is adapted to cooperate with the reset wrench 60 to achieve a transmission connection, and the distal end of the reset transmission assembly is adapted to cooperate 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 on it is reset to its initial position along its axis.

[0051] Reference Figure 8 , Figures 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 the first reset trigger rod 521, the second reset trigger rod 531, the transmission screw, and the reset wrench 60 can be connected in various ways. For example, in an optional embodiment, the proximal end of the transmission screw extends to the proximal end face of the drive housing 11 and is sealed to the second insertion interface 112. The proximal end of the firing transmission screw 125 is provided with a first insertion groove 125a, and the proximal end of the bending transmission screw 135 is provided with a second insertion groove 135a. The distal end of the first reset trigger rod 521 is inserted into the first insertion groove 125a, and the distal end of the second reset trigger rod 531 is inserted into the second insertion groove 135a. To achieve the transmission connection between the first reset trigger rod 521, the second reset trigger rod 531 and the firing transmission screw 125 and the bending transmission screw 135, the first insertion groove 125a and the second insertion groove 135a are formed into polygonal grooves, for example, groove structures with a triangular cross-section. The distal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are correspondingly formed into polygonal rod structures, so that the first reset trigger rod 521 and the second reset trigger rod 531 drive the transmission screws 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 polygonal insertion grooves, suitable for cooperating with the polygonal rod of the reset wrench 60 to achieve a transmission connection. They can also achieve a transmission connection with the reset wrench 60 by cooperating with other components.

[0052] In other alternative embodiments, the distal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are formed into polygonal sleeve structures, and the proximal end of the transmission screw is correspondingly constructed as a polygonal rod body. The first reset trigger rod 521 and the second reset trigger rod 531 are then sleeved on the proximal polygonal rod body of the transmission screw. Simultaneously, the proximal ends of the first reset trigger rod 521 and the second reset trigger rod 531 are also formed into polygonal sleeve structures, and the end of the reset wrench 60 is formed into a polygonal rotating head structure suitable for insertion into the sleeve structure. By providing this transitional structure of the first reset trigger rod 521 and the second reset trigger rod 531, the reset wrench 60 can be prevented from directly acting on the transmission screw inside the drive housing 11, thus achieving aseptic operation of the manual reset step.

[0053] In one optional embodiment, the first reset trigger rod 521 and the second reset trigger rod 531 are slidably connected within the mounting cavity of the mounting housing 51. A through hole is provided on the distal end face of the mounting housing 51, through which the first reset trigger rod 521 and the second reset trigger rod 531 can extend to the outside of the mounting housing 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 in the first position, they are engaged with the driving assembly; when the first reset trigger rod 521 and the second reset trigger rod 531 are in the second position, they are disengaged from the driving assembly.

[0054] like Figure 8 , Figures 10-12 As shown, the reset transmission assembly further includes a first reset elastic element 522 and a second reset elastic element 532 disposed within the mounting housing 51. The first reset elastic element 522 acts on the first reset trigger rod 521, adapted to provide a biasing force to the first reset trigger rod 521 to hold it in a first position; the second reset elastic element 532 acts on the second reset trigger rod 531, adapted to provide a biasing force to the second reset trigger rod 531 to hold it in the first position. In the initial position, the first reset elastic element 522 and the second reset elastic element 532 hold the first reset trigger rod 521 and the second reset trigger rod 531 in a position that can cooperate with the transmission screw.

[0055] To improve the reliability of the transmission engagement between the first reset trigger rod 521, the second reset trigger rod 531, and the transmission lead screw, such as Figure 8 , Figures 10-12As shown, the reset transmission assembly further includes a first adjusting member 523 and a second adjusting member 533 fixedly disposed near the mounting housing 51. The proximal ends of the first adjusting member 523 and the second adjusting member 533 are adapted to engage with the reset wrench 60. The distal ends of the first adjusting member 523 and the second adjusting member 533 are respectively connected to 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, and the engagement end structures of the first reset trigger rod 521, the second reset trigger rod 531, and the transmission screw are misaligned circumferentially, that is, when the first reset trigger rod 521 and the second reset trigger rod 531 fail to be inserted into the first insertion slot 125a and the second insertion slot 135a of the transmission screw, the first reset trigger rod 521 and the second reset trigger rod 531, under the action of the near side of the transmission screw, overcome the elastic force of the first reset elastic element 522 and the second reset elastic element 532 and move towards the near end. 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 at a set angle. At this time, the first reset trigger rod 521 and the second reset trigger rod 531 are matched with the first insertion slot 125a and the second insertion slot 135a. Under the action of the first reset elastic member 522 and the second reset elastic member 532, they can move to the far side to the position where they engage with the transmission screw, so as to further realize the manual reset of the drive component.

[0056] The first adjusting member 523 and the second adjusting member 533 are provided with polygonal first insertion through hole 523a and second insertion through hole 533a. The proximal end of the first reset trigger rod 521 is slidably inserted into the first insertion through hole 523a of the first adjusting member 523, and the proximal end of the second reset trigger rod 531 is slidably inserted into the second insertion through hole 533a of the second adjusting member 533. The distal ends of the first insertion through hole 523a and the second insertion through hole 533a are adapted to engage the reset wrench 60, thereby realizing a reliable transmission connection between the reset wrench 60 and the first adjusting member 523 and the second adjusting member 533, as well as 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.

[0057] The first adjusting member 523, the second adjusting member 533, and the first reset trigger rod 521 and the second reset trigger rod 531 are all constructed as stepped shafts. The first reset elastic member 522 and the second reset elastic member 532 are compression springs, which are sleeved on the shafts with smaller outer diameters of the first adjusting member 523, the second adjusting member 533, and the first reset trigger rod 521 and the second reset trigger rod 531. One end of the spring abuts against the stepped surface of the first adjusting member 523 and the second adjusting member 533, and the other end abuts against the stepped surface of the first reset trigger rod 521 and the second reset trigger rod 531.

[0058] To shut down the drive motor in case of a drive component failure, so that the transmission components can still be manually reset, refer to... Figure 8 , Figure 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 power to both drive motors can be cut off simultaneously.

[0059] In one optional embodiment, the control button 164 is located near the drive housing 11 and exposed outside the drive housing 11, such as... Figure 8 , Figures 10-12 As shown, the manual reset unit 50 also includes a motor switch trigger part 54. When the manual reset unit 50 is engaged with the power unit 10, the motor switch trigger part 54 is adapted to trigger the control button 164 to turn off the drive motor. Specifically, the motor switch trigger part 54 is constructed as a protruding structure integrally formed on the distal side of the mounting housing 51. When the manual reset unit 50 is engaged with the power unit 10, pressing the control button 164 turns off the drive motor, allowing for further manual reset operations.

[0060] Specifically, in order to ensure that the manual reset unit 50 can be 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 insertion interface 214 of the handle shell 21. That is, the mounting shell 51 can be tightly inserted into the first insertion interface 214 of the handle shell 21, so that the operator does not need to hold the manual reset unit 50, making it convenient for the operator to perform manual reset operation.

[0061] Furthermore, in one specific implementation, referring to Figure 13 , Figure 11 and Figure 8As shown, the middle region of the first insertion interface 214 is provided with at least one positioning rib 214a, and the distal end of the mounting shell 51 of the manual reset unit 50 is provided with at least one limiting snap-fit ​​part 511. The limiting snap-fit ​​part 511 cooperates with the positioning rib 214a to connect the manual reset unit 50 to the handle shell 21. For example, the first insertion interface 214 is provided with two positioning ribs 214a extending in the width direction, the mounting shell 51 is made of a plastic material that can undergo partial elastic deformation, and the limiting snap-fit ​​part 511 is configured as a snap-fit ​​groove structure formed on the distal side of the mounting shell 51.

[0062] like Figure 13 As shown, in one specific embodiment of the surgical instrument 100, the adapter unit 20 further includes a protective cover 26 detachably connected to the first insertion 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 insertion interface 214 of the handle housing 21 during normal surgery, thus avoiding the risk of bacterial contamination.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A surgical instrument, characterized in that, include: An adapter unit includes a handle housing, the proximal end of which is provided with a first insertion interface; A reusable power unit includes a drive housing and a drive assembly housed within the drive housing, the drive assembly being adapted to provide driving force, and a second insertion interface being provided at the proximal end of the drive housing; A manual reset unit is detachably plugged into a first connector on the handle housing and connected to the power unit via a second connector on the drive housing. 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. The manual reset unit drives the drive assembly to reset by cooperating with the reset wrench.

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

3. The surgical instrument according to claim 2, characterized in that, The manual reset unit includes a mounting housing, and the reset trigger rod is slidably accommodated within 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 engaged with the drive assembly; when the reset trigger rod is in the second position, the reset trigger rod is disengaged from the drive assembly.

4. The surgical instrument according to claim 3, characterized in that, The reset transmission assembly further includes a reset elastic element that acts on the reset trigger rod and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

5. The surgical instrument according to claim 2, characterized in that, The drive assembly includes a drive output rod, a drive motor connected to the drive output rod, a drive gear set, and a lead screw and nut assembly; the drive gear set includes a driving gear and a driven gear meshing together; the lead screw and nut assembly includes a transmission lead screw connected to the driven gear and a transmission nut threaded onto the transmission lead screw, the drive output rod is connected to the transmission nut, and the distal end of the reset trigger rod is adapted to be connected to the transmission lead screw.

6. The surgical instrument according to claim 5, characterized in that, The near end of the transmission lead screw is provided with a plug slot. When the manual reset unit is engaged with the power unit, the far end of the reset trigger rod is adapted to the plug slot.

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

8. The surgical instrument according to claim 4, characterized in that, The reset transmission assembly further includes an adjusting member fixedly connected to the proximal end of the mounting housing. The proximal end of the adjusting member is adapted to engage with the reset wrench, and the distal end of the adjusting member is connected to the reset trigger rod. The reset elastic element is located between the adjusting member and the reset trigger rod.

9. The surgical instrument according to claim 8, characterized in that, The adjusting member has a polygonal insertion hole, the proximal end of the reset trigger rod is slidably inserted into the insertion hole of the adjusting member, and the distal end of the insertion hole is adapted to engage the reset wrench.

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

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

12. The surgical instrument according to claim 1, characterized in that, The middle area of ​​the first insertion interface is provided with at least one positioning rib, and the far end of the mounting shell of the manual reset unit is provided with at least one limiting snap-fit ​​part. The limiting snap-fit ​​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 that is detachably connected to a first connector on the handle housing, which closes the handle housing when the manual reset unit is not engaged with the power unit.

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

15. A manual reset unit adapted for surgical instruments, characterized in that, The device includes a mounting housing and a reset transmission assembly mounted thereon and extending along a first direction. 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 a drive assembly of a surgical instrument. The manual reset unit drives the drive assembly to reset by cooperating with the reset wrench.

16. The manual reset unit according to claim 15, characterized in that, The reset transmission assembly includes a reset trigger rod, which is slidably housed within a 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, it is engaged with the drive assembly. When the reset trigger rod is in the second position, it is disengaged from the drive assembly.

17. The manual reset unit according to claim 16, characterized in that, The reset transmission assembly further includes a reset elastic element that acts on the reset trigger rod and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

18. The manual reset unit according to claim 17, characterized in that, The reset transmission assembly further includes an adjusting member fixedly connected to the proximal end of the mounting housing. The proximal end of the adjusting member is adapted to engage with the reset wrench, and the distal end of the adjusting member is connected to the reset trigger rod. The reset elastic element is located between the adjusting member and the reset trigger rod.

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