Surgical instrument and manual reset unit adapted to surgical instrument

Abstract

Disclosed are a surgical instrument and a manual reset unit adapted to the surgical instrument. The surgical instrument (100) comprises: an adaptation unit (20), comprising a handle housing, wherein a proximal end of the handle housing is provided with a first insertion interface; a reusable power unit (10), comprising a drive housing and a drive assembly (12, 13) accommodated in the drive housing, wherein a proximal end of the drive housing is provided with a second insertion interface; and a manual reset unit (50) detachably engaged with the power unit along the first insertion interface of the handle housing and the second insertion interface of the drive housing, the manual reset unit comprising a reset transmission assembly (52, 53), wherein a transmission input end of the reset transmission assembly is operatively in transmission engagement with a reset wrench (60), and a transmission output end of the reset transmission assembly is operatively in transmission engagement with the drive assembly (12, 13). The manual reset unit of the surgical instrument of the present invention is safe and reliable and enables germ-free contact with the external environment during a manual reset.

Description

A surgical instrument and a manual reset unit adapted to the surgical instrument.

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application No. 202510084409.4, filed on January 20, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of surgical instruments, and particularly to a clamping, cutting, and anastomotic surgical instrument. Background Technology

[0004] 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.

[0005] 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 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

[0006] 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.

[0007] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0008] 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 engaged with the power unit along the first insertion interface of the handle housing and 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] In some embodiments of the present invention, the drive assembly includes a drive motor, a drive gear set, and a lead screw and nut assembly that are pulverizedly 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 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 pulverizedly connected to the transmission lead screw.

[0013] In some embodiments of the present invention, the proximal end of the transmission lead screw is provided with a insertion groove, and when the manual reset unit is engaged with the power unit, the distal end of the reset trigger rod is inserted into the insertion groove.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The technical effects of the present invention will be explained in detail in the section on specific embodiments. Attached Figure Description

[0029] 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:

[0030] Figure 1 is a schematic diagram of the overall structure of a surgical instrument in one embodiment of the present invention;

[0031] Figure 2 is a structural schematic diagram of the adapter unit and the power unit in the coupled state in one embodiment of this application;

[0032] Figure 3 is an exploded view of the adapter unit in one embodiment of this application;

[0033] Figure 4 is a schematic diagram of the power unit in one embodiment of this application;

[0034] Figure 5 is a schematic diagram of the power unit after removing the drive sleeve in one embodiment of this application;

[0035] Figure 6 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.

[0036] Figure 7 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;

[0037] Figure 8 is a cross-sectional view of the manual reset unit, reset wrench and power unit in one embodiment of this application;

[0038] Figure 9 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;

[0039] Figure 10 is a schematic diagram of the structure of the manual reset unit in one embodiment of this application;

[0040] Figure 11 is a cross-sectional view of a manual reset unit in one embodiment of this application;

[0041] Figure 12 is an exploded view of the manual reset unit in one embodiment of this application;

[0042] Figure 13 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

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In various embodiments of the present invention, "distal / side" refers to the end / side of the surgical instrument that is away 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.

[0048] 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.

[0049] Specifically, Figure 1 illustrates a specific embodiment of the surgical instrument provided in this application. 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.

[0050] Referring to FIG1, 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.

[0051] As shown in Figure 2, 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 the longitudinal axis C and a gripping part 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.

[0052] It is understandable that the handle housing 21 can also be implemented in other ways. For example, it can be formed by two detachable shielding housings on the left and right or by front and rear detachable splicing to form an installation space for accommodating the power unit 10, which will not be elaborated here.

[0053] As shown in Figures 2 and 3, 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 pivot connection 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 ​​positions of the handle cover 212 and handle body 211 can be interchanged with those shown in Figure 2 or positioned in the left-right direction of the handle housing 21.

[0054] As shown in Figures 2 and 3, the elongated body assembly 22 is generally elongated tubular, including a tubular outer shell 223 that defines the longitudinal axis C. A transmission rod 221 / 222 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 221 / 222, namely 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 the proximally of which is an adapter engagement portion 24 for engaging with the power unit 10, thereby achieving a reliable transmission connection between the two parts. The proximally portion of the transmission rods 221 / 222 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.

[0055] As shown in Figures 4 and 5, 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, drive components 12 / 13, and a control component located within the drive housing 11. A mounting bracket 15 is provided inside the drive housing 11, and the drive components 12 / 13 and the control component are all 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 component 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.

[0056] As shown in Figure 5, the drive assembly 12 / 13 includes a firing drive assembly 12 and a bending drive assembly 13. The output end of the firing drive 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 enabling the closing and opening of the jaws of the end actuation assembly 30, and the cutting and merging of the tissue held in the jaws. The output end of the bending drive assembly 13 drives the bending transmission rods 221 / 222 of the elongated body assembly 22, which in turn drives the bending member of the end actuation assembly 30 to reciprocate, thereby enabling the bending operation of the end actuation assembly 30 relative to the elongated body assembly 22.

[0057] As shown in Figure 5, the drive assembly 12 / 13 includes a firing drive assembly 12 and a bending drive assembly 13. The output end of the firing drive 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 enabling the closing and opening of the jaws of the end actuation assembly 30, and the cutting and merging of tissue held in the jaws. The output end of the bending drive 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 enabling the bending operation of the end actuation assembly 30 relative to the elongated body assembly 22.

[0058] The firing drive assembly 12 and the bending drive assembly 13 have the same structure, each including a drive output rod 121 / 131 as the output component of the drive assembly, a drive motor 122 / 132, a drive gear set, and a lead screw and nut assembly that are connected to the drive output rod 121 / 131. The drive gear set includes a driving gear 123 / 133 and a driven gear 124 / 134 that are meshed together. The lead screw and nut assembly includes a transmission lead screw 125 / 135 connected to the driven gear 124 / 134 and a transmission nut 126 / 136 threaded onto the transmission lead screw 125 / 135. The drive output rod 121 / 131 is connected to the transmission nut 126 / 136. The rotational power of the drive motor 122 / 132 is converted into linear motion of the drive output rod 121 / 131 along its axial direction through the drive gear set and the lead screw and nut assembly.

[0059] Specifically, as shown in Figure 5, 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 134 that is driven by the firing drive screw 125. The firing driven gear 134 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 can drive 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.

[0060] 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.

[0061] Specifically, as shown in Figure 5, the drive motors 122 / 132 are fixedly connected to the mounting bracket 15. The output shafts of the drive motors 122 / 132 extend 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 screws 125 / 135 are rotatably connected to the mounting bracket 15 via thrust bearings 127 / 137. The mounting bracket 15 is also provided with a function to restrict the rotation of the transmission nut 126 / 136. The limiting plates 128 / 138 extend in the same direction as the transmission screw 125 / 135. The transmission nut 126 / 136 has fins on both sides of the axis of the transmission screw 125 / 135. The fins of the transmission nut 126 / 136 abut against the limiting plates 128 / 138 on both sides of the transmission screw 125 / 135, so that the transmission nut 126 / 136 can translate axially along the transmission screw 125 / 135.

[0062] As shown in Figure 7, 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 control buttons 164 for controlling the operation of the drive component, such as a trigger drive button, a bend drive button, and a trigger safety switch. 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.

[0063] Since the surgical instrument 100 is driven by a motor, the drive motor 122 / 132 has a certain risk of failure. To address this risk, as shown in Figures 6-9, 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 body. The manual reset unit 50 is adapted to shut down the drive motor 122 / 132 and release the transmission connection between the drive motor 122 / 132 and its transmission components when the drive motor 122 / 132 fails. Furthermore, the manual reset unit 50 is also used in conjunction with the reset wrench 60 to manually reset the transmission rod 221 / 222 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 rods 221 / 222 in the elongated body assembly 22 are operated back to their initial positions, so that the firing drive output rod 121 and the bending drive output rod 131 are adjusted to their initial states. That is, in the end actuation assembly 30, the cutting blade controlled by the firing member is at the closest end of the end actuation assembly 30, and the end actuation assembly 30 extends along the longitudinal axis direction.

[0064] As shown in Figures 6 and 4, the proximal end of the handle housing 21 of the adapter unit 20 is provided with a first insertion interface 214, and the proximal end of the drive housing 11 of the power unit 10 is provided with a second insertion interface 112. 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. 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. Using the disposable manual reset unit 50 as a transitional structure avoids the reset wrench 60 directly acting on the power unit 10 inside the drive housing 11, thus achieving aseptic operation of the manual reset step.

[0065] Referring to FIG7, the manual reset unit 50 includes a mounting housing 51 and a reset transmission assembly 52 / 53 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 with 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.

[0066] As shown in Figure 7, the proximal end of the reset transmission assembly 52 / 53 is adapted to cooperate with the reset wrench 60 to achieve a transmission connection, and the distal end of the reset transmission assembly 52 / 53 is adapted to cooperate with the transmission screw 125 / 135 to achieve a transmission connection, so as to transmit the torque applied by the operator to the reset wrench 60 to the transmission screw 125 / 135 so that the transmission nut 126 / 136 threaded on it is reset to its initial position along its axis.

[0067] Referring to Figures 8 and 10-12, the reset transmission assembly 52 / 53 includes a reset trigger rod 521 / 531. Specifically, it can be understood that the reset trigger rod 521 / 531 can be connected to the transmission screw 125 / 135 and the reset wrench 60 in various ways. For example, in an optional embodiment, the proximal end of the transmission screw 125 / 135 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 transmission screw 125 / 135 is provided with an insertion groove 125a / 135a. The distal end of the reset trigger rod 521 / 531 is inserted into the insertion groove 125a / 135a. To achieve the transmission connection between the reset trigger rod 521 / 531 and the transmission screw 125 / 135, the insertion slot 125a / 135a is formed as a polygonal groove, for example, a groove structure with a triangular cross-section. The distal end of the reset trigger rod 521 / 531 is correspondingly formed as a polygonal rod structure, so that the reset trigger rod 521 / 531 drives the transmission screw 125 / 135 to rotate. Similarly, the proximal side of the reset trigger rod 521 / 531 can also be formed as a polygonal insertion slot, suitable for cooperating with the polygonal rod of the reset wrench 60 to achieve a transmission connection. It can also achieve a transmission connection with the reset wrench 60 by cooperating with other components.

[0068] In other alternative embodiments, the distal end of the reset trigger rod 521 / 531 is formed into a polygonal sleeve structure, and the proximal end of the transmission screw 125 / 135 is correspondingly constructed as a polygonal rod body. The reset trigger rod 521 / 531 is then sleeved onto the proximal polygonal rod body of the transmission screw 125 / 135. Simultaneously, the proximal end of the reset trigger rod 521 / 531 is 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 insertion into the sleeve structure. By providing this transitional structure of the reset trigger rod 521 / 531, the reset wrench 60 is prevented from directly acting on the transmission screw 125 / 135 inside the drive housing 11, thus achieving aseptic operation of the manual reset step.

[0069] In one optional embodiment, the reset trigger rod 521 / 531 is 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 reset trigger rod 521 / 531 can extend to the outside of the mounting housing 51. The reset trigger rod 521 / 531 can be driven to move between a first position and a second position; when the reset trigger rod 521 / 531 is in the first position, it is engaged with the drive assembly; when the reset trigger rod 521 / 531 is in the second position, it is disengaged from the drive assembly.

[0070] As shown in Figures 8 and 10-12, the reset transmission assembly 52 / 53 further includes a reset elastic element 522 / 532 disposed within the mounting housing 51. The reset elastic element 522 / 532 acts on the reset trigger rod 521 / 531, and is adapted to provide a biasing force to the reset trigger rod 521 / 531 to hold it in a first position. In the initial position, the reset elastic element 522 / 532 holds the reset trigger rod 521 / 531 in a position that allows it to engage with the transmission screw 125 / 135.

[0071] To improve the reliability of the transmission engagement between the reset trigger rod 521 / 531 and the transmission screw 125 / 135, as shown in Figures 8 and 10-12, the reset transmission assembly 52 / 53 further includes an adjusting member 523 / 533 fixedly disposed near the mounting housing 51. The near end of the adjusting member 523 / 533 is adapted to engage with the reset wrench 60, and the far end of the adjusting member 523 / 533 is connected to the reset trigger rod 521 / 531. The reset elastic member 522 / 532 is located between the adjusting member 523 / 533 and the reset trigger rod 521 / 531. When the manual reset unit 50 is engaged with the power unit 10, and the engagement end structure of the reset trigger rod 521 / 531 and the transmission lead screw 125 / 135 is misaligned circumferentially, that is, when the reset trigger rod 521 / 531 fails to be inserted into the insertion groove 125a / 135a of the transmission lead screw 125 / 135, the reset trigger rod 521 / 531 overcomes the elastic force of the reset elastic element 522 / 532 under the action of the near side of the transmission lead screw 125 / 135. Sliding towards the proximal end, when the reset wrench 60 is inserted into the adjusting member 523 / 533 and drives it to rotate, the reset trigger rod 521 / 531 rotates at a set angle. At this time, the reset trigger rod 521 / 531 is matched with the insertion slot 125a / 135a. Under the action of the reset elastic member 522 / 532, it can move to the distal side to the position where it engages with the transmission screw 125 / 135, so as to further realize the manual reset of the drive assembly 12 / 13.

[0072] The adjusting member 523 / 533 is provided with a polygonal insertion through hole 523a / 533a. The proximal end of the reset trigger rod 521 / 531 is slidably inserted into the insertion through hole 523a / 533a of the adjusting member 523 / 533. The distal end of the insertion through hole 523a / 533a is adapted to engage the reset wrench 60, thereby realizing a reliable transmission connection between the reset wrench 60 and the adjusting member 523 / 533, and between the adjusting member 523 / 533 and the reset trigger rod 521 / 531.

[0073] Both the adjusting member 523 / 533 and the reset trigger rod 521 / 531 are constructed as stepped shafts. The reset elastic member 522 / 532 is a compression spring, which is sleeved on the shaft with the smaller outer diameter of the adjusting member 523 / 533 and the reset trigger rod 521 / 531. One end of the spring abuts against the stepped surface of the adjusting member 523 / 533, and the other end abuts against the stepped surface of the reset trigger rod 521 / 531.

[0074] In order to shut down the drive motors 122 / 132 in the event of a failure in the drive assembly 12 / 13, so that the transmission assembly can be manually reset, as shown in Figures 8 and 9, the power unit 10 is also provided with a control button 164 for controlling the start / stop of the drive motors 122 / 132. By triggering the control button 164, for example by pressing the control button 164, the power to both sets of drive motors 122 / 132 can be cut off simultaneously.

[0075] In one optional embodiment, the control button 164 is located near the drive housing 11 and exposed thereout, as shown in Figures 8 and 10-12. The manual reset unit 50 further 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 shut down the drive motors 122 / 132. 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 shuts down the drive motors 122 / 132, facilitating further manual reset operations.

[0076] 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.

[0077] Furthermore, in one specific embodiment, referring to Figures 13, 11, and 8, 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 housing 51 of the manual reset unit 50 is provided with at least one limiting snap-fit ​​portion 511. The limiting snap-fit ​​portion 511 cooperates with the positioning rib 214a to connect the manual reset unit 50 to the handle housing 21. For example, the first insertion interface 214 is provided with two positioning ribs 214a extending in the width direction, the mounting housing 51 is made of a plastic material capable of partial elastic deformation, and the limiting snap-fit ​​portion 511 is configured as a snap-fit ​​groove structure formed on the distal side of the mounting housing 51.

[0078] As shown in Figure 13, in one 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.

[0079] 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 (100), characterized in that, include: The adapter unit (20) includes a handle housing (21) with a first insertion interface (214) at the proximal end of the handle housing; The reusable power unit (10) includes a drive housing (11) and a drive assembly (12, 13) housed within the drive housing, the drive assembly being adapted to provide driving force, and a second insertion interface (112) being provided at the proximal end of the drive housing. A manual reset unit (50) is detachably connected to the power unit (10) along the first connector (214) of the handle housing (21) and the second connector (112) of the drive housing (11). The manual reset unit includes a reset transmission assembly (52, 53). The transmission input end of the reset transmission assembly is operably engaged with a reset wrench (60), and the transmission output end of the reset transmission assembly is operably engaged with the drive assembly (12, 13). The manual reset unit (50) drives the drive assembly (12, 13) to reset by cooperating with the reset wrench (60).

2. The surgical instrument (100) according to claim 1, characterized in that, The manual reset unit (50) includes a mounting housing (51) on which the reset transmission assembly (52, 53) is mounted.

3. The surgical instrument (100) according to claim 1 or 2, characterized in that, The drive components (12, 13) include drive motors (122, 132).

4. The surgical instrument (100) according to claim 3, characterized in that, The output component of the drive assembly (12, 13) is configured as a drive output rod (121, 131), and the drive motor (122, 132) is connected to the drive output rod (121, 131) in a transmission connection.

5. The surgical instrument (100) according to any one of claims 1 to 4, characterized in that, The reset transmission assembly (52, 53) includes a reset trigger rod (521, 531), the proximal end of which is adapted to drive engagement with the reset wrench (60), and the distal end of which is adapted to drive engagement with the drive assembly (12, 13).

6. The surgical instrument (100) according to claim 5, characterized in that, The manual reset unit (50) includes a mounting housing or the mounting housing (51), and the reset trigger rod (521, 531) 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 (521, 531) is engaged with the drive assembly (12, 13); when the reset trigger rod is in the second position, the reset trigger rod (521, 531) is disengaged from the drive assembly (12, 13).

7. The surgical instrument (100) according to claim 6, characterized in that, The reset transmission assembly (52, 53) further includes a reset elastic element (522, 532) that acts on the reset trigger rod (521, 531) and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

8. The surgical instrument (100) according to any one of claims 5 to 7, characterized in that, The drive assembly (12, 13) includes a drive motor (122, 132), a drive gear set, and a lead screw and nut assembly that are drivenly connected to its output components, particularly the drive output rod (121, 131); the drive gear set includes a driving gear (123, 133) and a driven gear (124, 134) that are meshed together; the lead screw and nut assembly includes a transmission lead screw (125, 135) connected to the driven gear and a transmission nut (126, 136) threaded onto the transmission lead screw; the drive output rod (121, 131) is connected to the transmission nut (126, 136); and the distal end of the reset trigger rod (521, 531) is adapted to be drivenly connected to the transmission lead screw (125, 135).

9. The surgical instrument (100) according to claim 8, characterized in that, The near end of the transmission screw (125, 135) is provided with a insertion groove (125a, 135a). When the manual reset unit (50) is engaged with the power unit (10), the far end of the reset trigger rod (521, 531) is inserted into the insertion groove (125a, 135a).

10. The surgical instrument (100) according to claim 8 or 9, characterized in that, The proximal end of the drive screw (125, 135) extends to the proximal end face of the drive housing (11) and is sealed to the second insertion interface (112).

11. The surgical instrument (100) according to any one of claims 7 to 10, characterized in that, The reset transmission assembly (52, 53) further includes an adjusting member (523, 533) fixedly connected to the proximal end of the mounting housing (51), the proximal end of the adjusting member being adapted to engage with the reset wrench (60) in a transmission manner, the distal end of the adjusting member being in a transmission manner connected with the reset trigger rod (521, 531), and the reset elastic member (522, 532) being located between the adjusting member (523, 533) and the reset trigger rod (521, 531).

12. The surgical instrument (100) according to claim 11, characterized in that, The adjusting member (523, 533) is provided with polygonal insertion holes (523a, 533a), the proximal end of the reset trigger rod (521, 531) is slidably inserted into the insertion holes (523a, 533a) of the adjusting member, and the distal end of the insertion holes (523a, 533a) is adapted to engage the reset wrench (60).

13. The surgical instrument (100) according to any one of claims 1 to 12, characterized in that, The drive assembly includes a firing drive assembly (12) and a turning drive assembly (13). The manual reset unit (50) includes a firing reset transmission assembly (52) and a turning reset transmission assembly (53). The firing reset transmission assembly (52) is driven to engage with the firing drive assembly (12), and the turning reset transmission assembly (53) is driven to engage with the turning drive assembly (13).

14. The surgical instrument (100) according to any one of claims 1 to 13, characterized in that, The power unit (10) is also provided with a control button (164) for controlling the start / stop of a drive motor or the drive motor (122, 132). 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 (122, 132).

15. The surgical instrument (100) according to any one of claims 1 to 14, characterized in that, The outer contour of the mounting housing (51) of the manual reset unit (50) matches the shape of the first insertion interface (214) of the handle housing (21).

16. The surgical instrument (100) according to claim 15, characterized in that, The first insertion interface (214) has at least one positioning rib (214a) in the middle area, and the manual reset unit (50) has at least one limiting snap-fit ​​part (511) at the far end of the mounting shell (51). The limiting snap-fit ​​part cooperates with the positioning rib to realize the connection between the manual reset unit (50) and the handle shell (21).

17. The surgical instrument (100) according to any one of claims 1 to 16, characterized in that, It also includes a protective cover (26) detachably connected to a first connector (214) on the handle housing (21), which closes the handle housing (21) when the manual reset unit (50) is not engaged with the power unit (10).

18. The surgical instrument (100) according to any one of claims 1 to 17, characterized in that, The adapter unit (20) further includes an elongated body assembly (22) connected to the distal end of the handle housing (21) via a rotating head assembly (23), the elongated body assembly defining the longitudinal axis direction.

19. A manual reset unit (50) adapted to a surgical instrument, preferably adapted to a surgical instrument (100) according to any one of claims 1 to 18, characterized in that, The manual reset unit includes a reset transmission assembly (52, 53) extending along a first direction. The transmission input end of the reset transmission assembly is operably engaged with a reset wrench (60), and the transmission output end of the manual reset unit (50) is operably engaged with a drive assembly (12, 13) of a surgical instrument. The manual reset unit (50) drives the drive assembly (12, 13) to reset by cooperating with the reset wrench (60).

20. The manual reset unit (50) according to claim 19, characterized in that, The reset transmission assembly (52, 53) includes a reset trigger rod (521, 531), which is slidably housed within the mounting housing (51) 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 (521, 531) is engaged with the drive assembly (12, 13). When the reset trigger rod is in the second position, the reset trigger rod (521, 531) is disengaged from the drive assembly (12, 13).

21. The manual reset unit (50) according to claim 20, characterized in that, The reset transmission assembly (52, 53) further includes a reset elastic element (522, 532) that acts on the reset trigger rod (521, 531) and is adapted to provide a biasing force to the reset trigger rod to hold it in a first position.

22. The manual reset unit (50) according to claim 21, characterized in that, The reset transmission assembly (52, 53) further includes an adjusting member (523, 533) fixedly connected to the proximal end of the mounting housing (51), the proximal end of the adjusting member being adapted to engage with the reset wrench (60) in a transmission manner, the distal end of the adjusting member being in a transmission manner connected with the reset trigger rod (521, 531), and the reset elastic member (522, 532) being located between the adjusting member (523, 533) and the reset trigger rod (521, 531).

23. The manual reset unit (50) according to any one of claims 19 to 22, characterized in that, It also includes a motor switch trigger unit (54), which is adapted to trigger the control button (164) of the surgical instrument when the manual reset unit (50) is engaged with the power unit (10) to turn off the drive motor (122, 132) of the drive assembly (12, 13).

24. A surgical instrument (100) comprising, in particular, a reusable power unit (10), and including a manual reset unit (50) according to any one of claims 19 to 23 for performing a reset operation on the drive components (12, 13) of the power unit (10).

Images