Surgical instrument

Abstract

The invention discloses a surgical instrument, and belongs to the field of surgical instruments. The invention relates to a handle assembly comprising an adapter unit comprising a handle housing and an elongated body assembly connected to a distal end of the handle housing by a swivel head assembly, the elongated body assembly defining a longitudinal axis, the handle housing comprising a handle body having a receiving chamber and a handle cover on an upper side of the handle body, the near side of the rotating head assembly is provided with an adaptive joint part; the reusable power unit comprises a driving shell and a driving assembly contained in the driving shell, the driving assembly is suitable for providing driving force, the far end of the power unit is provided with a power joint part, and the power joint part comprises a sliding locking piece capable of being operated to slide relative to the driving shell. The sliding locking piece is suitable for being connected with the adaptive connecting part in an operable mode so that the power unit can be installed in the handle body. According to the surgical instrument, the connection reliability of the disposable part and the reusable part is high, and the power transmission precision is high.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments, and in particular to a surgical instrument and an adaptable joint structure thereof. Background Art

[0002] Surgical instruments, especially electric surgical instruments with linear clamping, cutting and anastomosis functions, can perform clamping, suturing / anastomosis and cutting operations during surgical operations. According to the reusability of use, the existing staplers can be divided into disposable staplers, partially reusable staplers and completely or nearly completely reusable staplers. Disposable staplers have advantages in terms of safety and portability; completely or nearly completely reusable staplers have advantages in terms of intelligence and single-operation cost, but the instruments need to be partially or completely sterilized; and partially reusable staplers take into account the cost advantages and safety advantages of disposable staplers and completely or nearly completely reusable staplers, and are receiving increasing attention from the medical device industry.

[0003] For partially reusable electric surgical stapling instruments, the reused part is usually the power unit part with a relatively high-cost control module and power module. High-temperature and high-pressure sterilization or plasma sterilization may damage the core components of the power unit part and make it ineffective. Therefore, it is necessary to study a reusable power unit that does not require disinfection and sterilization. The sterile handle shell is connected to the slender body component to form an adapter unit. The adapter unit can be disposable or disinfected. By installing the reusable power unit in the handle shell of the adapter unit, a transmission connection with the slender body component is achieved. In order to achieve accurate transmission of power, the design of the joint part between the reusable power unit and the adapter unit becomes a technical issue that technicians in this field need to consider. Summary of the invention

[0004] The purpose of the present application is to provide a partially reusable surgical instrument to improve the connection reliability between the reused power unit and the adapter unit and to improve the accuracy of power transmission.

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

[0006] A surgical instrument comprises: an adapter unit, which includes a handle shell and a slender body assembly connected to the distal end of the handle shell through a rotating head assembly, the slender body assembly defines a longitudinal axis, the handle shell includes a handle body with a accommodating chamber and a handle cover body located on the upper side of the handle body, and an adapter joint portion is arranged on the proximal side of the rotating head assembly; a reusable power unit, which comprises a drive shell and a drive assembly accommodated in the drive shell, the drive assembly is suitable for providing a driving force, a power joint portion is arranged at the distal end of the power unit, the power joint portion comprises a sliding locking member which can be operated to slide relative to the drive shell, and the sliding locking member is suitable for operably engaging with the adapter joint portion to install the power unit in the handle body.

[0007] In some embodiments of the present invention, the sliding locking member can be driven to move between a first position and a second position in a direction orthogonal to the longitudinal axis, and when the sliding locking member is in the first position, the adapter joint can be operably engaged with the power unit, and when the sliding locking member is in the second position, the adapter joint is separated from the power unit.

[0008] In some embodiments of the present invention, the dynamic coupling portion further comprises a first elastic member, which is mounted on a distal end surface of the drive housing and acts on the sliding locking member, and is suitable for providing a biasing force to the sliding locking member to keep it in the first position.

[0009] In some embodiments of the present invention, the power engaging portion further comprises an unlocking member, the unlocking member cooperates with the wedge surface of the sliding locking member, and the unlocking member moves along the first direction to push the sliding locking member to move to the second position.

[0010] In some embodiments of the present invention, the adapting engagement portion includes an adapting snap-fit ​​groove disposed on the proximal end surface of the rotating head assembly, and when the sliding locking member is in the first position, at least a portion of the sliding locking member is located in the adapting snap-fit ​​groove.

[0011] In some embodiments of the present invention, the drive assembly includes a drive output rod, the adapter unit includes a transmission rod, the power coupling portion also includes a plug-in notch arranged on the distal side of the drive output rod, and the adapter coupling portion also includes an annular plug-in groove arranged on the proximal side of the transmission rod, and when the power unit is engaged with the adapter unit, the plug-in notch cooperates with the annular plug-in groove to limit the relative movement between the transmission rod and the drive output rod along the longitudinal axis direction.

[0012] In some embodiments of the present invention, the rotating head assembly also includes an initial position retaining member that defines an initial position of the transmission rod, and when the power unit and the adapter unit are not engaged, the initial position retaining member cooperates with the annular plug-in groove of the transmission rod; when the power unit and the adapter unit are engaged, the initial position retaining member can be operably disengaged from the transmission rod.

[0013] In some embodiments of the present invention, a unlocking rod cooperating with the initial position retaining member is provided at the distal end of the power unit, and when the power unit is engaged with the adapter unit, the unlocking rod triggers the initial position retaining member to move in a direction away from the transmission rod.

[0014] In some embodiments of the present invention, a guide structure is provided between the proximal side of the rotating head assembly and the distal side of the driving housing, and the guide structure has a guide slide extending along a first direction.

[0015] In some embodiments of the present invention, a first electrical connection portion is provided on the proximal side of the rotating head assembly, a second electrical connection portion is provided on the distal end of the power unit, the power unit also includes a main controller, the second electrical connection portion is electrically connected to the main controller, and when the adapter unit and the power unit are adapted and engaged in place, the second electrical connection portion is electrically connected to the first electrical connection portion to form a conductive circuit, providing a signal to the main controller that the adapter unit and the handle assembly are engaged in place.

[0016] In some embodiments of the present invention, the proximal surface of the rotating head assembly includes a first surface located on the upper side and a second surface located on the lower side, the first surface and the second surface are transitioned by a first step surface facing upward, and the first step surface is provided with the first electrical connection portion; the distal surface of the drive housing includes a third surface located on the upper side and a fourth surface located on the lower side, the third surface and the fourth surface are transitioned by a second step surface facing downward, and the second step surface is provided with the second electrical connection portion, and when the power unit is engaged with the adapter unit, the second electrical connection portion cooperates with the first electrical connection portion.

[0017] In some embodiments of the present invention, the proximal side of the transmission rod is located in an area where a first step surface is located close to the proximal end surface of the rotating head assembly, and the proximal end of the transmission rod extends to the outside of the first surface and extends to a position close to the second surface; the distal side of the drive output rod is located in an area where a second step surface is located close to the distal end surface of the drive housing, and the distal end of the drive output rod extends to the outside of the third surface of the drive housing and extends to a position close to the fourth surface.

[0018] In some embodiments of the present invention, the drive assembly includes a drive motor, a drive gear set and a screw-nut assembly that are transmission-connected to the drive output rod; the drive gear set includes a driving gear and a driven gear that are meshingly connected; the screw-nut assembly includes a transmission screw connected to the driven gear and a transmission nut threadedly connected to the transmission screw, the drive output rod is connected to the transmission nut, and the rotational power of the drive motor is converted into linear motion of the drive output rod along the longitudinal axis direction through the drive gear set and the screw-nut assembly.

[0019] In some embodiments of the present invention, a mounting bracket is provided in the drive housing, the drive motor is fixedly connected to the mounting bracket, the transmission screw is rotatably connected to the mounting bracket via a thrust bearing, and the transmission screw is provided with a force sensor for detecting the transmission force.

[0020] In some embodiments of the present invention, the mounting bracket is further provided with a limit plate for limiting the rotation of the transmission nut, and the transmission nut is provided with fins on both sides of the axis of the transmission screw, and the fins of the transmission nut stop on the limit plates on both sides of the transmission screw.

[0021] In some embodiments of the present invention, the power unit further includes an electric storage device, and the electric storage device is detachably connected to the lower side of the drive housing.

[0022] In some embodiments of the present invention, the power unit includes a first circuit board and a second circuit board electrically connected to each other, a mounting bracket is provided in the drive housing, the first circuit board is mounted on the upper side of the mounting bracket, the second circuit board is mounted on the lower side of the mounting bracket, the main controller is mounted on the first circuit board, and the power storage device is electrically connected to the second circuit board.

[0023] In some embodiments of the present invention, one end of the handle cover is pivotally connected to the handle body, and the other end is snap-fitted with the handle body.

[0024] In some embodiments of the present invention, a sensing component is further provided between the handle cover and the power unit, and the sensing component senses the connection state between the handle cover and the handle body and sends a sensing signal to the main controller.

[0025] In some embodiments of the present invention, the sensing component includes a magnetic sensor installed on the inner side of the drive housing, and a magnetic trigger component installed on the inner wall of the handle cover body. After the handle cover body is connected to the handle body, the magnetic trigger component triggers the magnetic sensor to send an induction signal.

[0026] In some embodiments of the present invention, an insertion guide is further included, which is suitable for cooperating with the opening area of ​​the handle body and the rotating head assembly when the handle cover is in the open state, so as to isolate the power unit from the handle body and the rotating head assembly during the process of installing the power unit into the handle body.

[0027] In some embodiments of the present invention, the insertion guide is constructed as a frame that matches the shape of the opening area of ​​the handle body, and the frame is formed by an opening frame body that cooperates with the handle body and an arc-shaped connecting plate located on the far side and cooperates with the rotating head housing. The opening frame body is constructed in a U shape, and at least a part of its bottom area is provided with an insertion interface that covers the side wall of the handle body.

[0028] The technical solution of the present invention has the following technical effects compared with the prior art:

[0029] The surgical instrument provided by the present invention can quickly and reliably engage the transmission rod in the adapter unit and the driving assembly of the handle assembly when the adapter unit is assembled and engaged with the handle assembly, thereby improving the connection strength between the handle and the adapter and increasing the power transmission accuracy. Furthermore, when the adapter unit is disassembled from the handle assembly, the transmission rod in the adapter unit and the driving assembly of the handle assembly can also be easily disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 This is a structural schematic diagram of an adapter unit and a power unit in an embodiment of the present application in a connected state;

[0032] Figure 3 An exploded diagram of an adaption unit in an embodiment of the present application;

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

[0034] Figure 5 An exploded diagram of a power unit in one embodiment of the present application;

[0035] Figure 6 This is a schematic diagram of the structure of a power unit in one embodiment of the present application after the driving surgery is removed;

[0036] Figure 7 This is a schematic diagram of the structure of a driving component in one embodiment of the present application;

[0037] Figure 8 This is a schematic structural diagram of a power joint portion of a power unit in one embodiment of the present application;

[0038] Fig. 9 This is a structural schematic diagram of an adapting joint portion of an adapting unit in an embodiment of the present application;

[0039] Fig.10 This is a structural schematic diagram of the adapter joint portion of the adapter unit after the handle housing is removed in one embodiment of the present application;

[0040] Fig.11 This is a schematic diagram of a preparation process for installing a power unit by inserting a guide member in an embodiment of the present application;

[0041] Fig.12 This is a schematic diagram of the installation completion of the power unit by inserting a guide member in one embodiment of the present application;

[0042] Fig.13 This is a schematic diagram of the structure of an insertion guide in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] In various embodiments of the present invention, the "distal end / side" refers to the end of the surgical instrument that is away from the operator when the surgical instrument is operated, and the "proximal end / side" refers to the end / side of the surgical instrument that is close to the operator when the surgical instrument is operated. The following is a specific embodiment of the surgical instrument.

[0048] Generally speaking, the embodiments of the surgical instruments described herein are endoscopic surgical cutting and stapling instruments. However, it should be noted that the surgical instruments can also be applied to non-endoscopic surgical cutting and stapling instruments, such as open electric surgical instruments for open surgery.

[0049] Specifically, Figure 1 An embodiment of a surgical instrument 100 provided by the present application is shown, and the surgical instrument 100 includes an adapter unit 20, a disposable end effector assembly 30, and a reusable power unit 10 (the power unit 10 is hidden inside the adapter unit 20). The end effector assembly 30 is used to operate tissue to perform specific surgical operations, such as clamping, suturing / anastomosis, cutting, and other surgical operations on tissue; the power unit 10 is used to drive the end effector assembly 30 to perform clamping, suturing / anastomosis, cutting, and other actions, and the adapter unit 20 is used to transmit the driving force of the power unit 10 to the end effector assembly 30.

[0050] Reference Figure 1 As shown, the end effector assembly 30 includes a staple cartridge assembly 31 and a staple anvil assembly 32, and the staple cartridge assembly 31 and the staple anvil assembly 32 can move relative to each other to close the jaws and clamp the tissue jaws. In a specific embodiment, the staple anvil assembly 32 of the end effector assembly 30 can be operably pivoted toward the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are closed to clamp the tissue; the staple anvil assembly 32 is pivoted in a direction away from the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release the tissue. As an alternative embodiment, the staple cartridge assembly 31 of the end effector assembly 30 can be operably pivoted toward the staple anvil assembly 32 until the jaws of the end effector assembly 30 are closed to clamp the tissue; and the staple cartridge assembly 31 is operably pivoted in a direction away from the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release the tissue. Furthermore, a movable firing member for performing surgical actions is provided in the end execution assembly 30, and the firing member can be operated to perform reciprocating motion. For example, when the firing member is driven to move from the proximal end to the distal end, a corresponding surgical operation is performed, such as cutting and stapling tissue.

[0051] like Figure 2As shown, the adapter unit 20 includes a handle housing 21 suitable for the operator to hold and an elongated body assembly 22 connected to the distal end of the handle housing 21 through a rotating head assembly 23. The handle housing 21 is generally T-shaped as a whole, including a main body extending along the longitudinal axis C and a gripping portion extending along a direction substantially perpendicular to the longitudinal axis C or inclined at a certain angle relative to the longitudinal axis C. The installation space of the power unit 10 is formed in the handle housing 21. An operating portion 213 is provided on the handle housing 21, and a push-twist and / or button structure is provided on the operating portion 213. The user performs the closing and / or firing action by operating the push-twist or button on the operating portion 213. The handle housing 21 includes a handle body 211 with a accommodating chamber and a handle cover 212 located on the upper side of the handle body 211. The handle cover 212 and the handle body 211 are connected by snap-fit ​​connection or other detachable connection methods. When the two are connected and closed, a sterile shell can be formed for enclosing the power unit 10 therein. The distal end of the handle housing 21 abuts against the proximal side of the rotating head assembly 23, so that the power unit 10 is located entirely inside the handle housing 21, so that the surgical instrument forms a sterile outer surface. In this way, through the arrangement of the handle housing 21, a sterile barrier can be arranged between the power unit 10 and the external environment, so as to prevent the contaminated power unit 10 from being exposed to the surgical environment and causing contamination, thereby achieving the reuse of the contaminated power unit 10 and reducing the surgical cost.

[0052] It is understandable that the handle housing 21 can also be implemented in many other ways. For example, two shielding shells that can be assembled and disassembled on the left and right or assembled and disassembled on the front and back can be used to form an installation space for accommodating the power unit 10, which will not be repeated here.

[0053] like Figure 2 , Figure 3 As shown, the proximal end of the handle cover 212 is pivotally connected to the proximal end of the handle body 211, and the distal end of the handle cover 212 is detachably connected to the distal end of the handle body 211 by means of a snap connection. The one-side pivot connection and the one-side snap connection can avoid the handle cover 212 from being separated from the handle body 211, thereby increasing the risk of bacteria. It is understandable that in other alternative embodiments, the pivot position and snap connection position of the handle cover 212 and the handle body 211 can be different. Figure 2 The illustrated embodiment is reversed or arranged in the left and right directions of the handle housing 21 .

[0054] like Figure 2 , Figure 3As shown, the elongated body assembly 22 is in the shape of an elongated tube as a whole, and includes a tubular housing 223, which defines a longitudinal axis C; a transmission rod 221 / 222 is arranged in the tubular housing 223, which is used to transmit the driving force of the power unit 10 to the end execution assembly 30. In some embodiments, the adapter unit 20 includes two sets of transmission rods 221 / 222, namely a firing transmission rod 221 and a bending transmission rod 222; a rotating head assembly 23 is arranged at the proximal side of the elongated body assembly 22, which can drive the elongated body assembly 22 to rotate relative to the power unit 10 around the longitudinal axis C, and the rotating head assembly 23 includes a rotating head housing 231, and an adapting joint portion 24 for engaging with the power unit 10 is arranged at the proximal side thereof, so as to realize a reliable transmission connection between the two parts. The proximal part of the transmission rod 221 / 222 in the adapter unit 20 extends outward from the proximal end surface of the rotating head housing 231, so as to be operably engaged with the driving assembly in the power unit 10.

[0055] like Figure 4 , Figure 5 As shown, the power unit 10 includes a driving part and a power storage device 14 for supplying power to the driving part. The driving part includes a driving housing 11 and a driving component and a control component located in the driving housing 11. The driving housing 11 is composed of an upper half shell 11a and a lower half shell 11b that are detachably spliced, and a mounting bracket 15 is provided therein, and the driving component and the control component are both mounted on the mounting bracket 15. The power storage device 14 is a rechargeable battery, which is detachably connected to the lower side of the driving housing 11 and is electrically connected to the control component inside the driving housing.

[0056] like Figure 6 , Figure 7 As shown, the drive assembly includes a firing drive assembly 12 and a bending drive assembly 13, wherein the output end of the firing drive assembly 12 drives the firing transmission rod 221 of the slender body assembly 22, thereby driving the firing member of the end actuator assembly 30 to perform reciprocating motion, thereby realizing the closing and opening operations of the jaws of the end actuator assembly 30, and the cutting and stapling operations of the tissue clamped in the jaws. The output end of the bending drive assembly 13 drives the bending transmission rod 222 of the slender body assembly 22, thereby driving the bending member of the end actuator assembly 30 to perform reciprocating motion, thereby realizing the bending operation of the end actuator assembly 30 relative to the slender body assembly 22.

[0057] The firing drive assembly 12 has the same structure as the bending drive assembly 13, and respectively includes a driving output rod 121 / 131 as the output component of the driving assembly, and a driving motor 122 / 132, a driving gear set and a screw nut assembly that are transmission-connected to the driving output rod 121 / 131; the driving gear set includes a driving gear 123 / 133 and a driven gear 124 / 134 that are meshingly connected; the screw nut assembly includes a transmission screw 125 / 135 connected to the driven gear 124 / 134 and a transmission nut 126 / 136 threadedly connected to the transmission screw 125 / 135, the driving output rod 121 / 131 is connected to the transmission nut 126 / 136, and the rotational power of the driving motor 122 / 132 is converted into a linear motion of the driving output rod 121 / 131 along its axial direction through the driving gear set and the screw nut assembly.

[0058] Specifically, if Figure 7 As shown, the firing drive assembly 12 includes a firing drive motor 122 and a firing drive gear set, wherein the firing drive gear set includes a firing active gear 123 that is transmission-connected to the output shaft of the firing drive motor 122 and a firing driven gear 124 that is transmission-connected to the firing drive screw 125; the firing driven gear 124 is fixedly connected to the firing drive screw 125, and the firing drive screw 125 is provided with a firing drive nut 126 to form a screw nut mechanism, and the firing drive output rod 121 is fixedly connected to the firing drive nut 126. The firing drive motor 122 rotates to drive the firing active gear 123 to rotate, and the firing drive gear set meshes with the transmission to drive the firing drive screw 125 to rotate, so that the firing drive nut 126 located thereon moves along the axis direction of the firing drive screw 125, thereby driving the firing drive output rod 121 to move in a direction parallel to the longitudinal axis direction. Similarly, the bending drive assembly 13 includes a bending drive motor 132 and a bending drive gear set, wherein the bending drive gear set includes a bending driving gear 133 that is transmission-connected to the output shaft of the bending drive motor 132 and a bending driven gear 134 that is transmission-connected to the bending transmission screw 135; the bending driven gear 134 is fixedly connected to the bending transmission screw 135, and the bending transmission screw 135 is provided with a bending transmission nut 136 to form a screw nut mechanism, and the bending drive output rod 131 is fixedly connected to the bending transmission nut 136. The rotation of the bending drive motor 132 can drive the bending driving gear 133 to rotate, and the meshing transmission of the bending drive gear set drives the bending transmission screw 135 to rotate, so that the bending transmission nut 136 located thereon moves along the axial direction of the bending transmission screw 135, thereby driving the bending drive output rod 131 to move in a direction parallel to the longitudinal axial direction.

[0059] It is understandable that in an alternative embodiment, the drive assembly may only include a set of firing drive assemblies 12 to provide a driving force for driving the surgical instrument to complete closing, bending and retracting operations, and driving the surgical instrument to complete the bending operation is achieved through a manual bending mechanism of the transmission.

[0060] Specifically, Figure 6 , Figure 7 As shown, the drive motor 122 / 132 is fixedly connected to the mounting bracket 15, and the output shaft of the drive motor 122 / 132 extends toward the proximal end in a direction parallel to the longitudinal axis. The drive gear set is located in the proximal area of ​​the drive housing 11. The transmission screw 125 / 135 is rotatably connected to the mounting bracket 15 through a thrust bearing 127 / 137. The mounting bracket 15 is also provided with a limit plate for limiting the rotation of the transmission nut 126 / 136. The limit plate includes The firing limit plate 151 and the bending limit plate 152, the limit plates 151 / 152 extend in the same direction as the transmission screw 125 / 135, the transmission nut 126 / 136 is provided with fins on both sides of the axis of the transmission screw 125 / 135, the fins of the transmission nut 126 / 136 stop on the limit plates 151 / 152 on both sides of the transmission screw 125 / 135, so that the transmission nut 126 / 136 can be translated axially along the transmission screw 125 / 135.

[0061] like Figure 7 As shown, the firing transmission screw rod 125 is provided with a firing force sensor 129 for detecting the transmission force. Fig. 9 As shown, the firing force sensor 129 is used to detect the force acting on the firing transmission screw 125 when the firing transmission nut 126 moves; the firing force sensor 129 is located at the proximal end of the firing transmission screw 125 and at a partial area of ​​the distal end of the driven wheel, one end face of which abuts against the mounting bracket 15, and the other end face abuts against the firing thrust bearing 127 sleeved on the firing transmission screw 125. The distal end of the firing thrust bearing 127 is provided with a firing rolling bearing. The above-mentioned setting of the firing rolling bearing and the firing thrust bearing 127 can prevent the circumferential force from affecting the detection sensitivity of the firing force sensor 129. Similarly, for the bending transmission system, in order to detect the size of the bending transmission force, a bending force sensor can also be provided on the bending transmission screw 135. Its installation method and working principle are consistent with those of the firing force sensor 129, and will not be repeated here.

[0062] like Figure 6As shown, the control component includes a main controller 18 and a control circuit board 16. The control circuit board 16 includes a first circuit board 161 and a second circuit board 162 which are electrically connected to each other. The first circuit board 161 is installed on the upper side of the mounting bracket 15 as the main control circuit board 16. The main controller 18 is installed on the first circuit board 161. The second circuit board 162 is installed on the lower side of the mounting bracket 15 and is electrically connected to the power storage device 14. Specifically, the upper surface of the power storage device 14 is provided with an electrical connection plug interface 14a, and the lower side of the second circuit board 162 is provided with an electrical connection plug connector 162a. The two are plugged together to realize the power supply connection between the power storage device 14 and the drive component. The second circuit board 162 is used to control and manage the power storage device 14, for example, to boost or reduce the voltage of the storage battery. The first circuit board 161 faces upward, and an instrument status display device 19 is also provided on its upper surface for displaying the current control status information of the surgical instrument, such as the firing force, the bending angle, etc. It can be understood that the part 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 for controlling the action of the drive assembly, such as a firing drive button, a bending drive button, a firing safety switch, etc. Since the second circuit board 162 is located on the lower side of the mounting bracket 15, it corresponds to the gripping portion of the handle housing 21, which is convenient for the operator to operate.

[0063] like Figure 8 As shown, the distal end of the power unit 10 is provided with a power coupling portion 17, and the power coupling portion 17 is used to cooperate with the adapter coupling portion 24 of the adapter unit 20, so as to realize a reliable connection between the housings of the power unit 10 and the adapter unit 20 on the one hand, and to make the drive output end in the power unit 10 engage with the transmission input end in the adapter unit 20 on the other hand, so as to realize a reliable transmission connection of the driving force. The following part describes in detail the coupling structure of the power unit 10 and the adapter unit 20.

[0064] like Figure 8As shown, the power engagement portion 17 of the power unit 10 includes a sliding locking member 171 that can be operated to slide relative to the drive housing 11, and the sliding locking member 171 is suitable for being operably engaged with the adapting engagement portion 24 to install the power unit 10 in the handle body 211. Specifically, in an optional embodiment, a guide support seat 172 for slidingly supporting the sliding locking member 171 is provided on the distal end surface of the drive housing 11, and the guide support seat 172 extends in the horizontal direction. The sliding locking member 171 can be driven to move between a first position and a second position along the upper surface of the guide support seat 172. When the sliding locking member 171 is in the first position, the adapting engagement portion 24 is operably engaged with the power unit 10, and when the sliding locking member 171 is in the second position, the adapting engagement portion 24 is separated from the power unit 10. A first elastic member 173 is disposed between the guide support seat 172 and the sliding locking member 171 . The first elastic member 173 acts on the sliding locking member 171 and is suitable for providing a biasing force to keep the sliding locking member 171 in the first position.

[0065] like Fig. 9 , Fig.10 As shown, the adapter joint portion 24 of the adapter unit 20 includes an adapter snap-in groove 241 provided on the proximal end face of the rotating head housing 231, the opening of the adapter snap-in groove 241 faces the horizontal direction, and when the sliding locking member 171 is in the first position, at least a partial area of ​​the sliding locking member 171 is located in the adapter snap-in groove 241. Specifically, a coupling protrusion 232 extending in the vertical direction is provided on the proximal end face of the rotating head housing 231, and the adapter snap-in groove 241 is formed on the inner side face of the coupling protrusion 232, and the upper surface of the coupling protrusion 232 has an inclined portion, and the side of the sliding locking member 171 close to the adapter snap-in groove 241 is constructed as a wedge surface structure, and when the power unit 10 moves downward to the inner side of the handle housing 21, the sliding locking member 171 first engages with the proximal end face of the rotating head housing 231. The engaging protrusion 232 on the surface contacts, that is, the wedge surface structure of the sliding locking member 171 contacts and cooperates with the inclined portion of the engaging protrusion 232, and the sliding locking member 171 overcomes the movement of the first elastic member 173 toward the second position under the action of the engaging protrusion 232; when the power unit 10 continues to move downward, the sliding locking member 171 enters the adapter card slot 241 under the action of the first elastic member 173, thereby realizing the engagement of the power unit 10 with the adapter unit 20.

[0066] In order to release the engagement between the power unit 10 and the adapter unit 20, as Figure 8As shown, the power joint 17 further includes an unlocking member 174, the unlocking member 174 cooperates with the wedge surface of the sliding locking member 171, and the unlocking member 174 moves in the first direction to push the sliding locking member 171 to move in the second position direction. Specifically, the unlocking member 174 is slidably connected to the distal end surface of the drive housing 11 in the first direction and is located on the upper side of the sliding locking member 171. The lower end of the unlocking member 174 is provided with a wedge surface structure to cooperate with the wedge surface of the sliding locking member 171. When the unlocking member 174 is operated to move downward, the sliding unlocking member 174 can be pushed to move in the second position direction to the outside of the adapter card slot 241. At this time, the power unit 10 can be moved upward to move the power unit 10 out of the outside of the handle body 211 of the adapter unit 20.

[0067] In order to realize the transmission connection between the driving output rod 121 / 131 (including the firing driving output rod 121 and the bending driving output rod 131) in the power unit 10 and the transmission rod 221 / 222 (including the firing transmission rod 221 and the bending transmission rod 222) in the adapter unit 20, as shown in FIG. Figure 8-Figure 10 As shown, the power joint part 17 also includes a plug-in notch 121a / 131a disposed on the far side of the drive output rod 121 / 131, and the adapter joint part 24 also includes an annular plug-in groove 221a / 222a disposed on the near side of the transmission rod 221 / 222. When the power unit 10 is engaged with the adapter unit 20, the plug-in notch 121a / 131a cooperates with the annular plug-in groove 221a / 222a to limit the relative movement between the transmission rod 221 / 222 and the drive output rod 121 / 131 along the longitudinal axis direction. Since the plug-in notch 121a / 131a and the annular plug-in groove 221a / 222a can achieve surface contact between the drive output rod 121 / 131 and the transmission rod 221 / 222 along most of the circumferential area, the transmission connection strength between the two can be guaranteed, and the transmission reliability is high.

[0068] In order to ensure that the transmission rod 221 / 222 in the adapter unit 20 is in a position capable of engaging with the drive output end in the power unit 10 in the initial state without the power unit 10, as shown in FIG. Fig. 9 , Fig.10 As shown, the rotating head assembly 23 also includes an initial position retaining member 233 that defines the initial position of the transmission rod 221 / 222. When the power unit 10 and the adapter unit 20 are not engaged, the initial position retaining member 233 cooperates with the annular plug-in groove 221a / 222a of the transmission rod 221 / 222 to limit the movement of the transmission rod 221 / 222 along the axial direction; when the power unit 10 and the adapter unit 20 are engaged, the initial position retaining member 233 can be operably disengaged from the transmission rod 221 / 222.

[0069] In an optional embodiment, the initial position retaining member 233 is used to simultaneously maintain the initial positions of the firing transmission rod 221 and the bending transmission rod 222. The initial position retaining member 233 is constructed to have two arc-shaped grooves arranged at intervals on the upper surface, which are respectively used to accommodate the areas of the firing transmission rod 221 and the bending transmission rod 222 located outside the proximal end of the rotating head shell 231. A second elastic member 234 is also provided between the initial position retaining member 233 and the rotating head shell 231, and the second elastic member 234 acts on the initial position retaining member 233, and is suitable for providing a biasing force to the initial position retaining member 233 to maintain the initial position retaining member 233 in the matching position with the transmission rod 221 / 222. When the power unit 10 and the adapter unit 20 are not engaged, the initial position retaining member 233 cooperates with the annular plug-in groove 221a / 222a of the transmission rod 221 / 222 under the action of the second elastic member 234 to limit the movement of the transmission rod 221 / 222 along the axial direction.

[0070] like Figure 8 As shown, the far end of the power unit 10 is provided with an unlocking rod 175 that cooperates with the initial position retaining member 233. When the power unit 10 is engaged with the adapter unit 20, the unlocking rod 175 triggers the initial position retaining member 233 to move away from the transmission rod 221 / 222. Specifically, the unlocking rod 175 is installed on the far side of the drive housing 11 and extends in the vertical direction. The end of the unlocking rod 175 cooperates with the upper surface of the initial position retaining member 233. When the power unit 10 moves downward, the unlocking rod 175 first contacts the initial position retaining member 233, so that it overcomes the force of the second elastic member 234 and moves downward to disengage from the transmission rod 221 / 222. The plug-in notch 121a / 131a on the drive output rod 121 / 131 can be in the annular plug-in groove 221a / 222a on the transmission rod 221 / 222, so as to realize the transmission connection between the power unit 10 and the adapter unit 20.

[0071] A guide structure is further provided between the proximal side of the rotating head housing 231 and the distal side of the driving housing 11. The guide structure has a first direction ( Figure 8 The guide slideway extending from the drive housing 11 to the rotating head housing 231 is arranged to align the engagement position of the drive housing 11 with the rotating head housing 231, thereby avoiding the problem of poor engagement effect caused by shaking between the two during engagement. Fig. 9 , Fig.10 As shown, a first slide groove 235 extending along a first direction is provided on the proximal side of the rotating head housing 231. Figure 8As shown, a second slide groove 111 extending along the second direction is provided on the far side of the driving housing 11, the upper side of the first slide groove 235 is in the form of a notch, and the lower side of the second slide groove 111 is in the form of a notch. When the power unit 10 is coupled to the adapter unit 20 from top to bottom, the first slide groove 235 of the driving housing 11 is inserted along the second slide groove 111 of the rotating head housing 231 to realize the installation guide of the power unit 10.

[0072] The proximal surface of the rotating head assembly 23 includes a first surface located on the upper side and a second surface located on the lower side, and the first surface and the second surface are transitioned through a first step surface facing upward, that is, the second surface is located proximal to the first surface; the distal surface of the driving housing 11 includes a third surface located on the upper side and a fourth surface located on the lower side, and the third surface and the fourth surface are transitioned through a second step surface facing downward, that is, the fourth surface is located proximal to the third surface; a first electrical connection portion 242 is provided on the first step surface, and a second electrical connection portion 176 is provided on the second step surface, and when the power unit 10 is engaged with the adapter unit 20, the second electrical connection portion 176 cooperates with the first electrical connection portion 242 to achieve electrical connection.

[0073] The second electrical connection part 176 is electrically connected to the main controller 18 via a transmission line. When the adapter unit 20 and the power unit 10 are adapted and engaged into place, the second electrical connection part 176, the first electrical connection part 242 and the transmission line form a conductive loop to provide a signal to the main controller 18 indicating that the adapter unit 20 and the handle assembly are engaged into place.

[0074] The proximal side of the transmission rod 221 / 222 is located in the area where the first step surface is close to the proximal end surface of the rotating head housing 231, and the proximal end of the transmission rod 221 / 222 extends to the outside of the first surface and extends to a position close to the second surface, that is, the proximal end surface of the transmission rod 221 / 222 is located on the distal side of the second surface of the rotating head housing 231, thereby avoiding the risk of damage to the transmission rod 221 / 222 due to excessive length; the distal side of the drive output rod 121 / 131 is located in the area where the second step surface is close to the distal end surface of the drive housing 11, and the distal end of the drive output rod 121 / 131 extends to the outside of the third surface and extends to a position close to the fourth surface, that is, the distal end surface of the drive output rod 121 / 131 is located on the proximal side of the fourth surface of the drive housing 11, thereby avoiding the risk of damage to the drive output rod 121 / 131 due to excessive length.

[0075] Specifically, in order to improve the safety of using the surgical instrument, that is, after the power unit 10 is installed on the handle body 211, the handle cover 212 is connected to the handle body 211 before performing the surgical operation. A sensing component is also provided between the handle cover 212 and the power unit 10. The sensing component senses the connection status between the handle cover 212 and the handle body 211 and sends a sensing signal to the main controller 18.

[0076] like Figure 6 , Figure 2 As shown, the sensing component includes a magnetic sensor 163 installed on the first circuit board 161 inside the drive housing 11, and a magnetic trigger component 25 installed on the inner wall of the handle cover 212. When the handle cover 212 is connected to the handle body 211, the magnetic trigger component 25 moves with the handle cover 212 to the sensing range of the magnetic sensor 163, triggering the magnetic sensor 163 to send a sensing signal.

[0077] Since the reusable power unit 10 is in a sterile environment, when installing the power unit 10, it is prevented that the power unit 10 touches the disposable adapter unit 20 in a sterile state, especially the relevant area of ​​the handle body 211 and the insertion port of the rotating head housing 231. The surgical instrument also includes an insertion guide 40, such as Fig.11 , Fig.12 As shown, the insertion guide 40 is adapted to cooperate with the opening area of ​​the handle body 211 when the handle cover 212 is in the open state, so as to isolate the power unit 10 from the handle body 211 / rotating head assembly 23 during the process of the power unit 10 being installed into the handle body 211 .

[0078] like Fig.13 As shown, the insertion guide 40 is constructed as a frame that matches the shape of the opening area of ​​the handle body 211, and the frame is formed by an opening frame body 41 that cooperates with the handle body 211 and an arc-shaped connecting plate 42 located on the far side and cooperates with the rotating head shell 231, and the arc-shaped connecting plate 42 is covered on the upper surface of the rotating head shell 231, and the opening frame body 41 is constructed as a U-shape that matches the shape of the handle body 211, and at least a part of its bottom area is provided with an insertion interface that covers the side wall of the handle body 211.

[0079] More specifically, the insertion guide 40 is constructed in the form of a frame that gradually expands upward, so that the operator can avoid or minimize contact with the power unit 10 when inserting it into the inner side. At the same time, the insertion guide 40 is also provided with a hand-held portion 421 on the upper side of the arc-shaped connecting plate 42 for the operator to disassemble and assemble the insertion guide 40. The hand-held portion 421 is constructed as two parallel and oppositely arranged plates integrally formed on the upper side of the arc-shaped connecting plate 42.

[0080] The assembly process of the power unit 10 and the adapter unit 20 is as follows: Figure 11-Figure 12 As shown, the handle cover 212 of the adapter unit 20 is opened, the insertion guide 40 is plugged into the handle body 211, and the power unit 10 is loaded into the inner side of the handle body 211 along the surrounding frame of the insertion guide 40 until the power joint 17 of the power unit 10 is matched with the adapter joint 24 of the adapter unit 20 to achieve the engagement of the power unit 10 with the adapter unit 20; since the insertion guide 40 is covered on the upper side of the handle body 211 and the rotating head housing 231, it can completely isolate the power unit 10 from the handle body 211 to avoid bacterial contamination; after the power unit 10 is engaged with the adapter unit 20, the insertion guide 40 is removed, and the handle cover 212 is clamped on the handle body 211, so that the loading of the surgical instrument 100 is achieved. At this time, the main controller 18 receives the assembly in place signal sent by the magnetic sensor 163, and the display device 19 displays the relevant signal of the installation completion. When the operation is completed, the handle cover 212 can be opened first, and then the unlocking member 174 can be pressed downward to move the sliding unlocking member 174 to the outside of the adapter slot 241; the power unit 10 can be pulled upward to move the power unit 10 out of the handle body 211 of the adapter unit 20.

[0081] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that: include: An adaptor unit, comprising a handle housing and an elongated body assembly connected to a distal end of the handle housing through a rotating head assembly, wherein the elongated body assembly defines a longitudinal axis, the handle housing comprises a handle body having a receiving chamber and a handle cover body located on an upper side of the handle body, and an adaptor joint portion is disposed on a proximal side of the rotating head assembly; A reusable power unit comprises a drive housing and a drive assembly housed in the drive housing, wherein the drive assembly is suitable for providing a driving force, a power coupling portion is provided at the distal end of the power unit, and the power coupling portion comprises a sliding locking member operable to slide relative to the drive housing, and the sliding locking member is suitable for operably engaging with the adapting coupling portion to install the power unit in the handle body.

2. The surgical instrument according to claim 1, characterized in that The sliding locking member can be driven to move between a first position and a second position along a direction orthogonal to the longitudinal axis. When the sliding locking member is in the first position, the adapter joint can be operably engaged with the power unit. When the sliding locking member is in the second position, the adapter joint is separated from the power unit.

3. The surgical instrument according to claim 2, characterized in that The power engaging portion further comprises a first elastic member, which is mounted on the distal end surface of the drive housing and acts on the sliding locking member, and is suitable for providing a biasing force to the sliding locking member to keep the sliding locking member in the first position.

4. The surgical instrument according to claim 3, characterized in that The dynamic engagement portion further comprises an unlocking member, wherein the unlocking member cooperates with the wedge surface of the sliding locking member, and the unlocking member moves along the first direction and is suitable for pushing the sliding locking member to move toward the second position.

5. The surgical instrument according to claim 2, characterized in that: The adapting engagement portion comprises an adapting snap-fitting groove arranged on the proximal end surface of the rotating head assembly. When the sliding locking member is in the first position, at least a partial area of ​​the sliding locking member is located in the adapting snap-fitting groove.

6. The surgical instrument according to claim 1, characterized in that The drive assembly includes a drive output rod, the adapter unit includes a transmission rod, the power engagement portion also includes a plug-in notch arranged on the distal side of the drive output rod, and the adapter engagement portion also includes an annular plug-in groove arranged on the proximal side of the transmission rod. When the power unit is engaged with the adapter unit, the plug-in notch cooperates with the annular plug-in groove to limit the relative movement between the transmission rod and the drive output rod along the longitudinal axis direction.

7. The surgical instrument according to claim 6, characterized in that The rotating head assembly also includes an initial position retaining member that defines an initial position of the transmission rod. When the power unit is not engaged with the adapter unit, the initial position retaining member cooperates with the annular plug-in groove of the transmission rod; when the power unit is engaged with the adapter unit, the initial position retaining member can be operably disengaged from the transmission rod.

8. The surgical instrument according to claim 7, characterized in that The far end of the power unit is provided with an unlocking rod matched with the initial position retaining member. When the power unit is engaged with the adapter unit, the unlocking rod triggers the initial position retaining member to move in a direction away from the transmission rod.

9. The surgical instrument according to claim 6, characterized in that: A guide structure is provided between the proximal side of the rotating head assembly and the distal side of the driving housing, and the guide structure has a guide slideway extending along a first direction.

10. The surgical instrument according to claim 1, characterized in that A first electrical connection part is arranged on the proximal side of the rotating head assembly, a second electrical connection part is arranged on the distal end of the power unit, the power unit further comprises a main controller, the second electrical connection part is electrically connected to the main controller, when the adapter unit and the power unit are adapted and engaged into place, the second electrical connection part is electrically connected to the first electrical connection part to form a conductive loop, and a signal is provided to the main controller indicating that the adapter unit and the handle assembly are engaged into place.

11. The surgical instrument according to claim 10, characterized in that The proximal surface of the rotating head assembly includes a first surface located on the upper side and a second surface located on the lower side, the first surface and the second surface are transitioned by a first step surface facing upward, and the first step surface is provided with the first electrical connection portion; the distal surface of the drive housing includes a third surface located on the upper side and a fourth surface located on the lower side, the third surface and the fourth surface are transitioned by a second step surface facing downward, and the second step surface is provided with the second electrical connection portion, and when the power unit is engaged with the adapter unit, the second electrical connection portion cooperates with the first electrical connection portion.

12. The surgical instrument according to claim 11, characterized in that The proximal side of the transmission rod is located in an area where a first step surface is located close to the proximal end surface of the rotating head assembly, and the proximal end of the transmission rod extends to the outside of the first surface and extends to a position close to the second surface; the distal side of the drive output rod is located in an area where a second step surface is located close to the distal end surface of the drive housing, and the distal end of the drive output rod extends to the outside of the third surface of the drive housing and extends to a position close to the fourth surface.

13. The surgical instrument according to claim 1, characterized in that The driving assembly includes a driving motor, a driving gear set and a lead screw nut assembly that are transmission-connected to the driving output rod; the driving gear set includes a driving gear and a driven gear that are meshingly connected; the lead screw nut assembly includes a transmission screw connected to the driven gear and a transmission nut threadedly connected to the transmission screw, the driving output rod is connected to the transmission nut, and the rotational power of the driving motor is converted into a linear motion of the driving output rod along the longitudinal axis direction through the driving gear set and the lead screw nut assembly.

14. The surgical instrument according to claim 13, characterized in that A mounting bracket is provided in the driving housing, the driving motor is fixedly connected to the mounting bracket, the transmission screw is rotatably connected to the mounting bracket via a thrust bearing, and a force sensor for detecting transmission force is provided on the transmission screw.

15. The surgical instrument according to claim 14, characterized in that The mounting bracket is also provided with a limit plate for limiting the rotation of the transmission nut. The transmission nut is provided with fins on both sides of the axis of the transmission screw. The fins of the transmission nut are stopped at the limit plates on both sides of the transmission screw.

16. The surgical instrument according to claim 1, characterized in that The power unit further includes an electric storage device which is detachably connected to the lower side of the drive housing.

17. The surgical instrument according to claim 16, characterized in that The power unit includes a first circuit board and a second circuit board which are electrically connected to each other. A mounting bracket is provided in the drive housing. The first circuit board is mounted on the upper side of the mounting bracket, and the second circuit board is mounted on the lower side of the mounting bracket. The main controller is mounted on the first circuit board, and the power storage device is electrically connected to the second circuit board.

18. The surgical instrument according to claim 1, wherein: One end of the handle cover is pivotally connected to the handle body, and the other end is snap-fitted with the handle body.

19. The surgical instrument according to claim 10, characterized in that A sensing component is also provided between the handle cover and the power unit, and the sensing component senses the connection state between the handle cover and the handle body and sends a sensing signal to the main controller.

20. The surgical instrument according to claim 19, characterized in that The induction component includes a magnetic sensor installed on the inner side of the drive housing, and a magnetic triggering member installed on the inner wall of the handle cover. After the handle cover is connected to the handle body, the magnetic triggering member triggers the magnetic sensor to send an induction signal.

21. The surgical instrument according to claim 1, characterized in that It also includes an insertion guide, which is suitable for cooperating with the opening area of ​​the handle body and the rotating head assembly when the handle cover is open, so as to isolate the power unit from the handle body and the rotating head assembly during the process of installing the power unit into the handle body.

22. The surgical instrument according to claim 1, characterized in that The insertion guide is constructed as a frame that matches the shape of the opening area of ​​the handle body. The frame is formed by an opening frame body that cooperates with the handle body and an arc-shaped connecting plate located on the far side and cooperates with the rotating head housing. The opening frame body is constructed in a U shape, and at least a part of its bottom area is provided with an insertion interface that covers the side wall of the handle body.

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