Electric surgical instrument

Abstract

The present invention discloses an electric surgical instrument. The handle assembly is operable to provide driving force to the end actuator assembly; the slender body assembly defines a longitudinal axis and transmits the driving force provided by the handle assembly. The transmission assembly is operably engaged with the slender body assembly to transmit the driving force; the power unit includes at least one set of driving mechanisms, which are operably engaged with the transmission assembly of the first part; the installation safety is suitable for cooperating with the distal end of the slender body assembly, so that the transmission assembly of the first part is in an initial state suitable for engaging with the driving mechanism of the power unit, and the installation safety includes an anti-disassembly structure, which limits the circumferential movement of the installation safety relative to the slender body assembly when the transmission assembly is not engaged with the driving mechanism of the power unit. The electric surgical instrument provided by the present invention cannot be removed by the operator before the instrument is installed on the handle, so as to maintain the position of the firing rod and the bending connecting rod, and ensure the smooth assembly between the disposable part and the handle assembly.

Description

Technical Field

[0001] The invention relates to a surgical instrument, in particular to an electric surgical instrument. Background Art

[0002] Linear clamping, cutting and stapling electric surgical instruments can clamp, suturing / anastomose, and cut tissues during surgical operations. At present, according to the use of reusable staplers, they can be divided into disposable staplers, partially reusable staplers, and completely or nearly completely reusable staplers. Disposable staplers have more advantages in safety and lightness; completely or nearly completely reusable staplers have more advantages in intelligence and single operation costs, 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 more and more attention from the medical device industry.

[0003] In some reusable electric surgical instruments, the reusable part is usually a high-cost power part set in the handle assembly, and the reusable part is connected to the disposable part for transmission. In order to ensure the reliability of power transmission after the two are assembled, the reusable part and the disposable part need to be in the initial setting position. Since the initial state of the reusable part can be set by the electric control of the power part, how to ensure the initial position of the disposable part has become a technical problem that technicians in this field need to solve.

[0004] Furthermore, the operator may make an error in operation during use, that is, before assembling the two, the safety button of the disposable part is removed. After the safety button is removed, the transmission assembly of the disposable part cannot be maintained in the initial set position, and the two may not be successfully assembled with the handle assembly, resulting in problems such as incomplete function and / or unusable surgical instruments. Summary of the invention

[0005] The purpose of the present invention is to provide an electric surgical instrument to solve the problems existing in the prior art. Before the disposable part is installed on the handle assembly, the operator cannot remove the installation safety to maintain the position of the firing rod and the bending connecting rod to ensure smooth assembly between the disposable part and the handle assembly.

[0006] In view of the above technical problems, the present invention provides the following technical solutions:

[0007] An electric surgical instrument comprises: a handle assembly, operable to provide a driving force to an end execution assembly; a slender body assembly, defining a longitudinal axis and transmitting the driving force provided by the handle assembly; the handle assembly comprises: a first part, wherein at least one transmission assembly is arranged in the first part, and the transmission assembly is operably engaged with the slender body assembly to transmit the driving force; a power unit, the power unit is detachably mounted on the first part of the handle assembly, and comprises at least one drive mechanism, and the drive mechanism is operably engaged with the transmission assembly of the first part; a mounting safety, suitable for cooperating with the distal end of the slender body assembly so that the transmission assembly of the first part is in an initial state suitable for engaging with the drive mechanism of the power unit, wherein the mounting safety also comprises an anti-disassembly structure, which limits the circumferential movement of the mounting safety relative to the slender body assembly when the transmission assembly is not engaged with the drive mechanism of the power unit.

[0008] In some embodiments of the present invention, the installation safety includes a main body, and the anti-disassembly structure includes a limiting groove arranged on the side wall of the main body; the limiting groove is suitable for accommodating a boss at the far end of the bending connecting rod arranged in the slender body assembly to limit the circumferential movement of the installation safety relative to the slender body assembly.

[0009] In some embodiments of the present invention, a damping protrusion is provided on the groove wall of the limiting groove, a damping groove is formed on the boss, and when the boss is inserted into the limiting groove, the damping protrusion is inserted into the damping groove.

[0010] In some embodiments of the present invention, the damping protrusion includes a damping surface located in the limiting groove, the damping surface is an arc surface, and the damping protrusion is inserted into the damping groove through the damping surface.

[0011] In some embodiments of the present invention, the groove bottom wall surface of the damping groove is a concave arc surface, and the arc surface fits the damping surface.

[0012] In some embodiments of the present invention, the two axial connections between the damping surface and the groove wall of the limiting groove are respectively the first damping point and the second damping point, and the first damping point and the second damping point are respectively abutted against two groove walls oppositely arranged on the damping groove.

[0013] In some embodiments of the present invention, an embedding groove is formed on the bending connecting rod, the boss is installed in the embedding groove, and two opposite side surfaces of one end of the boss respectively abut against two opposite groove walls of the embedding groove.

[0014] In some embodiments of the present invention, the embedding groove includes a guide groove wall, the guide groove wall is located at the distal end of the embedding groove, a top surface of the guide groove wall is provided with a guide slope, and the guide slope extends to the distal side surface of the guide groove wall.

[0015] In some embodiments of the present invention, the bending connecting rod further includes a hooking portion, which is located at the front end of the embedding groove and is used to hook on the bending actuator of the end actuator when the slender body assembly is connected to the end actuator assembly.

[0016] In some embodiments of the present invention, the handle assembly is detachably adapted to the power unit; when the handle assembly and the power unit are installed in place, the bending connecting rod is operated to move a certain distance proximally, so that the boss withdraws from the limiting groove, thereby releasing the circumferential rotation restriction of the slender body assembly on the installation safety, so that the installation safety can be removed.

[0017] The technical advantages of the technical solution of the present invention are described in detail in the specific implementation method section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the objects and advantages of the present invention, wherein:

[0019] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention;

[0020] Figure 2 It is a structural schematic diagram of an end execution assembly in a specific embodiment of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a nail magazine assembly of an end effector assembly in a specific embodiment of the present invention;

[0022] Figure 4 An exploded view of a part of the structure of a specific embodiment of the present invention;

[0023] Figure 5 An exploded view of a power unit and a handle assembly in a specific embodiment of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of a power unit in a specific embodiment of the present invention;

[0025] Figure 7 It is a partial exploded view of a power unit in a specific embodiment of the present invention;

[0026] Figure 8 It is a structural schematic diagram of a specific implementation mode of the first driving mechanism of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of a specific implementation mode of the second driving mechanism in the present invention;

[0028] Fig.10 It is a schematic diagram of the overall structure of a power unit in a specific embodiment of the present invention;

[0029] Fig.11 A partial cross-sectional view of a handle assembly portion in a specific embodiment of the present invention;

[0030] Fig.12 A partial cross-sectional view of the first part in a specific embodiment of the present invention;

[0031] Fig.13 It is a structural schematic diagram of the internal components of the first part in a specific implementation manner of the present invention;

[0032] Fig.14 It is a structural schematic diagram of the first part in a specific implementation manner of the present invention;

[0033] Fig.15 A transmission matching diagram of a first transmission assembly and a second transmission assembly in a specific implementation manner of the present invention;

[0034] Fig.16 Another transmission coordination diagram of the first transmission assembly and the second transmission assembly in a specific implementation manner of the present invention;

[0035] Fig.17 This is a schematic diagram of the structure of installing a fuse in a specific implementation manner of the present invention;

[0036] Fig.18a A front view of a fuse installed in a specific embodiment of the present invention;

[0037] Fig.18b A cross-sectional view of a fuse installed in a specific embodiment of the present invention;

[0038] Fig.19 It is a structural schematic diagram of an initial state of installing a safety inserting elongated body component in a specific embodiment of the present invention;

[0039] Fig. 20 It is a structural schematic diagram of a specific embodiment of the present invention after the fuse is installed and the slender body component is plugged into place;

[0040] Fig.21 It is a schematic structural diagram of the distal end of the elongated body in a specific embodiment of the present invention;

[0041] Fig. 22 It is a schematic diagram of the process of installing the fuse and plugging it into the far end of the elongated body in a specific embodiment of the present invention;

[0042] Fig.23 It is a structural schematic diagram of a specific embodiment of the present invention in which a safety device is installed and inserted into the distal end of the elongated body;

[0043] Fig.24 This is a schematic diagram of the structure of installing a fuse in a specific implementation manner of the present invention;

[0044] Fig.25 It is a structural schematic diagram of a specific embodiment of the present invention after the safety is installed and the bending connecting rod is clamped;

[0045] Fig.26 It is a structural schematic diagram of a specific implementation manner of the present invention before the safety and the bending connecting rod are installed and not locked;

[0046] Fig.27a It is a structural schematic diagram of a bending connecting rod in a specific embodiment of the present invention;

[0047] Figure 27b for Fig.27a A partial enlarged view of the middle AA;

[0048] Fig.28 It is a schematic structural diagram of the adaptation of the bending connecting rod and the end actuator assembly in a specific implementation manner of the present invention. DETAILED DESCRIPTION

[0049] 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.

[0050] 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", "third", etc., are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] 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.

[0052] 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.

[0053] In various embodiments of the present invention, the “distal end / side” refers to the end of the electric surgical instrument that is away from the operator when the electric surgical instrument is operated, and the “proximal end / side” refers to the end / side that is close to the operator when the electric surgical instrument is operated.

[0054] The following is a specific embodiment of the electric surgical instrument. Generally speaking, the embodiment of the electric surgical instrument described herein is an endoscopic surgical cutting and stapling instrument. However, it should be noted that the electric surgical instrument can also be a non-endoscopic surgical cutting and stapling instrument, such as an open electric surgical instrument for open surgery.

[0055] Specifically, Figure 1 The electric surgical instrument 100 shown includes a handle assembly 10, a rotating head assembly 40, an elongated body assembly 20, and an end effector assembly 30, which are sequentially connected from the proximal end to the distal end. The elongated body assembly 20 extends distally from the distal end of the rotating head assembly 40, and the user operates the rotating head assembly 40 to rotate the elongated body assembly 20 and the end effector assembly 30 together around the longitudinal axis defined by the elongated body assembly 20. The end effector assembly 30 is operably mounted at the distal end of the elongated body assembly 20, and is used to operate tissue to perform specific surgical operations, such as clamping, suturing / anastomosis, cutting, and other surgical operations on tissue.

[0056] Reference Figure 2 , Figure 3As shown, the end execution assembly 30 includes a proximal main body portion 30a and a distal execution portion 30b, and the proximal main body portion 30a and the distal execution portion 30b are pivotally connected by a joint assembly 30c. The distal execution portion 30b 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 to clamp the tissue jaws. In a specific embodiment, the staple anvil assembly 32 can be operated to pivot toward the staple cartridge assembly 31 until the jaws of the end execution assembly 30 are closed to clamp the tissue; the staple anvil assembly 32 pivots in a direction away from the staple cartridge assembly 31 until the jaws of the end execution assembly 30 are opened to release the tissue. As an alternative embodiment, the nail magazine assembly 31 of the end execution assembly 30 can be operated to pivot toward the anvil assembly 32 until the jaws of the end execution assembly 30 are closed to clamp the tissue; and the nail magazine assembly 31 is operated to pivot in a direction away from the nail magazine assembly 31 until the jaws of the end execution assembly 30 are opened to release the tissue.

[0057] Specifically, Figure 2 and Figure 3 As shown, the proximal main body part 30a of the end execution assembly 30 is detachably connected to the distal end of the slender body assembly 20, and the proximal main body part 30a includes a slender outer tube 33, an inner tube 34 placed in the outer tube 33, and a firing member 35 placed in the inner tube 34 and slidable; in the distal execution part 30b of the end execution assembly 30, the nail magazine assembly 31 includes a nail magazine 310, a nail magazine base 311, and a slider 312 placed in the nail magazine 310 and slidable along the longitudinal axis; the proximal end of the firing member 35 is connected to the firing rod 21 in the slender body assembly 20, and the distal end of the firing member 35 is in contact with the slider 312 and can slide / move in the longitudinal axis direction as a whole to perform the corresponding surgical operation. For example, when the firing member 35 is driven to move from the proximal end to the distal end, the tissue is cut and anastomosed.

[0058] Specifically, Figure 2 As shown, the joint assembly 30c includes a first joint component 37 and a second joint component 38; the first joint component 37 and the second joint component 38 are pivotally connected to the inner tube 34 through a pivot pin, and the nail magazine base 311 is fixedly connected to the first joint component 37 and the second joint component 38. The proximal main body portion 30a also includes a hinge link 36 slidably disposed in the inner tube 34, the proximal end of the hinge link 36 includes a hook portion 36a, which is combined with the bending link 22 in the slender body assembly 20 through the hook portion 36a, and the distal end of the hinge link 36 acts on the protrusion 37a on the joint component 37, and the protrusion 37a is spaced from the pivot axis. The linear movement of the hinge link 36 causes the joint assembly 30c to pivot around the pivot pin, thereby driving the distal execution portion 30b to bend relative to the proximal main body portion 30a.

[0059] Of course, for those skilled in the art, other forms of end effector assemblies can also be selected according to different types of surgical operations. Meanwhile, the end effector 30 can be selected to be detachably connected to the elongated body assembly 20, or to be non-detachably connected to the elongated body assembly 20.

[0060] like Figure 1 , Figure 4-Figure 5 As shown, in a specific embodiment of the electric surgical instrument 100 of the present invention, at least a portion of the handle assembly 10 is held by an operator. By means of push knobs, buttons, etc. provided on the handle assembly 10, the operator can control the end execution assembly 30 of the electric surgical instrument 100 to perform actions such as closing, firing, retracting and opening, thereby completing the clamping, anastomosis, cutting and release operations of the tissue (described in detail later).

[0061] like Figure 5 As shown, in a specific embodiment of the electric surgical instrument 100 of the present application, the handle assembly 10 includes a first part 11a and a second part 11b, and the first part 11a and the second part 11b define a storage space for the handle assembly 10. The power unit 60 can be detachably installed in the storage space to serve as a reusable component. In multiple surgeries, it can be used in conjunction with brand new or sterilized first part 11a and second part 11b, thereby allowing the more expensive power unit part of the electric surgical instrument to be reused. Moreover, since the power unit 60 is entirely located inside the first part 11a and the second part 11b, it is isolated from the outer space of the handle assembly 10 and will not contaminate the sterile environment of the operating room.

[0062] Specifically, in an optional embodiment, the first part 11a and the second part 11b are disposable and non-reusable parts that can be detachably connected by means of snap connections, fastener connections, etc., wherein the first part 11a is extended along the longitudinal axis to form the main body 10a of the handle assembly 10, and the slender body assembly 20 is rotatably connected to the distal end of the first part 11a through a rotating head assembly 40. The second part 11b is an inverted L-shape with an open structure as a whole, and a partial area thereof extends perpendicular to the longitudinal axis or extends at a certain angle relative to the longitudinal axis to form the gripping portion 10b of the handle assembly 10, and another partial area of ​​the second part 11b is formed as a connection transition zone that cooperates with the first part 11a. More specifically, as Figure 5As shown, at least one connection buckle is provided in the connection transition area of ​​the second part 11b, and at least one connection bayonet is correspondingly provided in the first part 11a, and the connection buckle cooperates with the connection bayonet to realize the clamping connection between the two. It can be understood that the first part 11a and the second part 11b can also be sterilized by a medical sterilization process (sterilization methods such as low-temperature plasma or high-temperature and high-pressure means) to achieve the reuse of the two parts.

[0063] In the first part 11a of the electric surgical instrument 100 described in the present application, at least one transmission assembly 13 is provided, and the transmission assembly is adapted to be operably engaged with at least one drive mechanism of the power unit 60 to perform a specific surgical operation of the electric surgical instrument 100. For example, Figure 4 As shown, in a specific embodiment of the electric surgical instrument 100 of the present invention, a first transmission assembly 13 (firing transmission assembly) is provided in the first part 11a, and the first transmission assembly 13 is suitable for performing closing, firing, retracting and opening operations on the end effector assembly 30 of the electric surgical instrument 100. Alternatively, in an alternative embodiment, a second transmission assembly 14 (bending transmission assembly) may be further provided in the first part 11a of the electric surgical instrument 100 of the present invention, and the second transmission assembly 14 is suitable for performing a bending operation on the end effector assembly 30 of the electric surgical instrument 100. The power unit 60 may also include corresponding drive mechanisms, for example, a first drive mechanism 610 (firing drive mechanism) and a second drive mechanism 620 (bending drive mechanism), and the first drive mechanism 610 and the second drive mechanism 620 are respectively mounted / accommodated on the mounting frame 630. The first drive mechanism 610 and the second drive mechanism 620 may be operably engaged with the first transmission assembly 13 and the second transmission assembly 14, respectively, so as to provide power for the movement of the first transmission assembly 13 and the second transmission assembly 14, respectively. Of course, it is understandable that in other alternative embodiments, the electric surgical instrument 100 may include only one set of transmission components and drive mechanisms, or multiple sets of corresponding transmission components and drive mechanisms to meet the requirements of different surgical operations for surgical instruments.

[0064] like Figure 4 As shown, the elongated body component 20 is formed into an elongated tubular shape, which includes an elongated external tube 23 defining a longitudinal axis and a support member 24, most of the area of ​​the support member 24 is located inside the elongated external tube 23, and the distal end of the support member 24 extends out of the distal end of the elongated external tube 23 and forms a tubular shell end with the same diameter as the elongated external tube 23; the elongated body component 20 is provided with a transmission rod group for triggering the end actuator component 30 to realize bending, jaw opening or closing, and firing or retracting. Specifically, as Figure 2 and Figure 4As shown, in one embodiment, a firing rod 21 is disposed in the elongated body assembly 20, the distal end of the firing rod 21 is operably connected to the firing member 35 of the end actuator assembly 30, and the proximal end of the firing rod 21 is engaged with the transmission assembly 13 of the first part 11a of the handle assembly 10. A bending link 22 is also disposed in the elongated body assembly 20, the distal end of the bending link 22 is operably engaged with the hinge link 36 of the end actuator assembly 30, and the proximal end of the bending link 22 is engaged with the transmission assembly 13 of the first part 11a of the handle assembly 10. The firing rod 21 and the bending link 22 are slidably supported on the support member 24, respectively. For example, specifically, the firing rod 21 is slidably connected to the internal sliding hole of the support member 24, and the bending connecting rod 22 is slidably connected to the outer sliding hole of the support member 24; the distal end of the firing rod 21 is located on the outside of the distal tubular shell end of the support member 24, and the bending connecting rod 22 is located on the inside of the distal tubular shell end of the support member 24.

[0065] The first transmission assembly 13 located in the first part 11a of the handle assembly 10 drives the firing rod 21 to make linear motion along the longitudinal axis, thereby driving the firing member 35 of the end actuator assembly 30 to make reciprocating motion, thereby realizing the closing and opening operations of the jaws of the end actuator assembly 30, and the anastomosis and cutting operations on the tissue clamped in the jaws. The second transmission assembly 14 located in the first part 11a of the handle assembly 10 drives the bending link 22 to make linear motion along the longitudinal axis, thereby driving the hinge link 36 of the end actuator assembly 30 to make reciprocating motion, and then causing the joint assembly 30c to pivot around the proximal main body 30a. More specifically, the inner wall of the end of the tubular shell of the support member 24 is provided with a first limiting groove 24a (such as Fig. 20 As shown in FIG. 1 , the proximal end of the inner tube 34 of the end actuator assembly 30 includes an engagement lug 34a, and the two cooperate to releasably engage with the elongated body assembly 20 in a bayonet connection manner. After the inner tube 34 is engaged with the elongated body assembly 20, the bending link 22 is snap-connected with the hinge link 36 in the end actuator assembly 30, and the firing rod 21 is snap-connected with the firing member 35 of the end actuator assembly 30.

[0066] Next, the specific structure of the driving mechanism 610, 620 in the power unit 60 will be described in detail with reference to the accompanying drawings. Figure 6-Figure 8 As shown, the first driving mechanism 610 includes a first motor 611 and a first driving assembly 612 engaged with the first motor 611 to convert the rotational motion output by the first motor 611 into a linear motion along the longitudinal axis. Figure 6 , Figure 7 As shown, the first motor 611 is installed on the first side of the mounting frame 630 ( Figure 6The first drive assembly 612 is located on the second side ( Figure 6 The first drive assembly 612 is at least partially mounted on the inner side of the mounting frame 630, so that the first drive assembly 612 is located at the junction of the gripping portion 10b and the main body 10a of the handle assembly 10. The first drive assembly 612 converts the rotational motion output by the first motor 611 into the linear motion of the rack parallel to the longitudinal axis in the form of a gear rack. Figure 7 , Figure 8 As shown, the first drive assembly 612 includes a first drive rack 613 slidably accommodated on the mounting frame 630, and the first drive rack 613 engages the output shaft of the first motor 611 through the first drive gear set 614. The first drive gear set 614 includes a gear 614a (first drive gear) rigidly connected to the output shaft of the first motor 611, and a gear 614b (second drive gear) mounted on a shaft 614d and meshed with the gear 614a and the first drive rack 613, respectively. In other alternative embodiments, the first drive assembly 612 converts the rotational motion output by the first motor 611 into the rotational motion of the reduction gear in a gear transmission manner, and then meshes with the gear transmission set in the first part.

[0067] Similarly, if Figure 7 and Fig. 9 As shown, the second driving mechanism 620 includes a second motor 621 and a second driving assembly 622 engaged with the second motor 621 to convert the rotational motion output by the second motor 621 into a linear motion along the longitudinal axis. Figure 6 As shown, the second motor 621 is mounted on the first side of the mounting frame 630 ( Figure 6 The second motor 621 is entirely accommodated inside the gripping portion 10b of the handle assembly 10; the second drive assembly 622 is located on the second side ( Figure 6 The second drive assembly 622 is at least partially mounted on the inner side of the mounting frame 630, so that the second drive assembly 622 is located at the portion where the grip portion 10b and the main body portion 10a of the handle assembly 10 meet. Similarly, the second drive assembly 622 converts the rotational motion of the second motor 621 into the linear motion of the rack parallel to the longitudinal axis in the manner of a gear rack. Fig. 9As shown, the second drive assembly 622 includes: a second drive rack 623 slidably accommodated on the mounting frame, and the second drive rack 623 engages the output shaft of the second motor 621 through a second drive gear set 624. The second drive gear set 624 includes a gear 624a (first drive gear) rigidly connected to the output shaft of the second motor 621, a gear 624b (second drive gear) engaged with the second drive rack 623, and a gear 624c (third drive gear) meshed with the gear 624a, and the gear 624b is coaxially connected with the gear 624c through a shaft 624d. Since the end effector assembly 30 of the electric surgical instrument 100 needs to maintain a smooth and slow movement when performing a bending operation, the second drive gear set 624 can be configured in the form of a reduction gear to control the longitudinal linear movement speed of the second drive rack 623. For example, the gear 624b and the gear 624c are combined into a reduction gear set, for example, the gear 624c having a greater number of teeth than the gear 624a and / or the gear 624b is selected. In other alternative embodiments, the second drive assembly 622 converts the rotational motion output by the second motor 621 into the rotational motion of the reduction gear in a gear transmission manner, and then meshes with the gear transmission set in the first part.

[0068] Accordingly, if Figure 13-Figure 17 As shown, the first part 11a of the electric surgical instrument 100 according to the embodiment of the present application includes a first transmission assembly 13, which includes a first transmission rack 132 rotatably engaged with the proximal end of the firing rod 21 of the slender body assembly 20, and the first transmission rack 132 is operably engaged with the first drive rack 613 of the first drive assembly 612 of the power unit 60 through a first transmission gear set 133. Specifically, the first transmission gear set 133 includes a coaxially connected gear 133a (first transmission gear) and a gear 133b (second transmission gear), and the gear 133b is operably meshed with the first transmission rack 132.

[0069] Similarly, the electric surgical instrument 100 according to the embodiment of the present invention further has a second transmission assembly 14 disposed in the first portion 11a, including a second transmission rack 142 engaged with the bending connecting rod 22 of the slender body assembly 20, and the second transmission rack 142 is operably engaged with the second drive rack 623 of the second drive assembly 622 of the power unit 60 through a second transmission gear set 143. Fig.16 As shown, the second transmission gear set 143 includes a coaxially connected gear 143a (first transmission gear) and a gear 143b (second transmission gear), wherein the gear 143b is operably engaged with the second transmission rack 142, and the gear 143a is operably engaged with the second drive rack 623 of the second drive assembly 620 of the power unit 60.

[0070] Furthermore, the bending link 22 is connected to the second transmission rack 142 of the second transmission assembly 14 through a transition assembly 18, so as to allow the bending link 22 to rotate relative to the second transmission assembly 14. Fig.13 , Fig.14 As shown, the transition assembly 18 includes a first transition rod 181 (proximal transition rod), a second transition rod 182 (distal transition rod) and a rotating bearing 183, the proximal end of the bending connecting rod 22 is fixedly connected to the second transition rod 182, the proximal end of the second transition rod 182 is fixedly connected to the inner ring of the rotating bearing 183, the distal end of the first transition rod 181 is fixedly connected to the outer ring of the rotating bearing 183, and the proximal end of the first transition rod 181 is connected to the second transmission rack 142. The above-mentioned transition assembly 18 allows the first transition rod 181 and the second transmission rack 142 to remain fixed when the rotating head 40 drives the slender body assembly 20 to rotate relative to the handle assembly 10, and the bending connecting rod 22 can rotate reliably.

[0071] Furthermore, a receiving groove is provided on the upper side of the mounting frame 630, and the side wall of the receiving groove is connected to a part of the driving rack of the driving mechanism, and is suitable for receiving at least a part of the transmission gear set 133 of the transmission assembly, such as the first transmission gear of the transmission gear set of the transmission assembly, when the power unit 60 is installed in the receiving space formed by the first part 11a and the second part 11b, so that it can be operably engaged with the driving rack of the driving assembly, thereby engaging the transmission assembly with the driving assembly. Figure 6 A first accommodating groove 631 is provided on the upper side of the mounting frame 630, and the side wall of the first accommodating groove 631 is communicated with a partial area of ​​the first driving rack 613. The first accommodating groove 631 is suitable for accommodating the gear 133a of the first transmission gear set 133 of the first transmission assembly 13 when the power unit 60 is installed in the accommodating space formed by the first part 11a and the second part 11b, so that the gear 133a is operably engaged with the first driving rack 613 of the first driving assembly 612, thereby engaging the first transmission assembly 13 with the first driving assembly 612. Similarly, a second accommodating groove 632 may also be provided on the upper side of the mounting frame 630, and the side wall of the second accommodating groove 632 is communicated with a partial area of ​​the second driving rack 623. When the power unit 60 is installed in the accommodating space formed by the first part 11a and the second part 11b, the second accommodating groove 632 accommodates the gear 143a of the second transmission gear set 143 of the second transmission assembly 14, so that the gear 143a is operably engaged with the second driving rack 623 of the second driving assembly 622, thereby engaging the second transmission assembly 14 with the second driving assembly 622.

[0072] Continue as Figure 6 As shown, the power unit 60 also includes a power supply unit 65 for providing electric energy to the motors 611, 621. The power supply unit 65 can be configured as a rechargeable power storage power supply unit or a power supply unit with a replaceable battery. The power supply unit 65 is mounted on a second circuit board 67, and the second circuit board 67 is mounted on the upper side of the mounting frame 630. The power unit 60 also includes a first circuit board 66 mounted on the second side of the mounting frame 630. The first circuit board 66 is arranged opposite to the power supply unit 65 at a distance. A first electrical connection unit 661 is arranged on the first circuit board 66. The first electrical connection unit 661 can be configured to include a first plug terminal mounted on the first circuit board 66. The first circuit board 66 serves as the main control circuit board of the electric surgical instrument 100, receives the detection electrical signal transmission from the first part 11a and the power unit 60 and controls the start and stop of the motors 611, 621. At the same time, it can also identify the number of uses / types / statuses of the first part 11a based on the electrical signals transmitted by electrical devices (such as position sensors, etc.) in the first part 11a, and prompt the user by issuing an alarm signal, etc., to prevent the reuse of disposable parts.

[0073] The mounting frame 630 is also provided with a first signal detection unit 671, as shown in FIG. Fig.15 As shown, the first signal detection unit 671 includes a first position sensor mounted on the second circuit board 67, and the first position sensor is used to detect the moving position of the first drive rack 613, and the moving position can be an absolute position or a relative position. For example, the first position sensor can be configured as a proximity switch, and when the first drive rack 613 reaches a first set position, and the first set position is, for example, the initial matching position of the first transmission assembly 13 and the first drive assembly 612, the proximity switch sends an electrical signal. When the power unit 60 is installed in the accommodation space, the power supply unit 65, the second electrical connection unit 690 and the first signal detection unit 671 are located in the area where the main body 10a of the handle assembly 10 is located.

[0074] like Fig.10As shown, the power unit 60 further includes a housing 64, the mounting frame 630 is mounted inside the housing 64, and the housing 64 has a first opening 641 in the area where the output ends of the driving mechanisms 610 and 620 are located, so that the gears 133a, 143a of the transmission gear sets 133, 143 of the transmission assemblies 13, 14 in the first part 11a are inserted into the accommodating grooves 631, 632 along the first opening 641. The housing 64 has a second opening 642 in the area where the first electrical connection portion 661 is located. The first part 11a of the electric surgical instrument 100 is further provided with a second electrical connection portion 690 for connecting to the first electrical connection portion 661 in the power unit 60, the second electrical connection portion 690 includes a second plug-in terminal mounted on the inner wall of the first part 11a, and when the power unit 60 is mounted in the accommodating space, the second electrical connection portion 690 extends into the housing 64 along the second opening 682 to be electrically connected to the first electrical connection portion 661.

[0075] Continue as Figure 6 As shown, the power unit 60 also includes a trigger signal receiving part 680 installed on the inner side of the housing 64, and the trigger signal receiving part 680 includes at least one push contact switch installed on the third circuit board 68, which is used to cooperate with at least one button or push-twist installed on the second part 11b to form a complete button switch to control the start or stop of the motor 611, 621 of the firing drive mechanism or the bending drive mechanism. The housing 64 is provided with a connecting hole for connecting the button and the push contact switch on the distal end surface facing the gripping part 10b.

[0076] Specifically, Fig.11 As shown, four buttons are arranged on the second part 11b, namely, a forward button 681 located on the upper side, a retract button 682 located on the lower side, a left turn button 683 located on the left side, and a right turn button 684 located on the right side. When the electric surgical instrument 100 is used for a turning operation, when the end effector assembly 30 of the electric surgical instrument 100 is kept in an open position, the user triggers the left turn button 683 or the right turn button 684, which can make the distal effector portion 30b of the end effector assembly 30 turn to a set angle relative to the proximal main body portion 30a. When the electric surgical instrument 100 is used for a closing and firing operation, the operator triggers the forward button 681 to close the jaws of the end effector assembly 30, and keeps it in a closed state for a first set time, for example, 15s-20s, and then triggers the forward button 681 again to realize the firing action. After the electric surgical instrument 100 completes the firing operation on the tissue, the user triggers the retract button 682 to perform the operation of retracting and opening the end effector assembly 30.

[0077] like Fig.15 , Fig.16 As shown, a second signal detection unit for detecting the moving position of the transmission rack 132, 142 is also provided in the first part 11a, and the second signal detection unit includes four groups of position sensors installed on the fourth circuit board 69, which are respectively used to detect the initial position of the first transmission rack 132 of the first transmission assembly 13 (corresponding to the initial position where the firing rod 21 does not move and the end execution assembly 30 is in the jaw open state), a second position sensor 693 for detecting the first set position of the first transmission rack 132 of the first transmission assembly 13 (corresponding to the initial position where the firing rod 21 is not moved and the end execution assembly 30 is in the jaw open state), and a second position sensor 694 for detecting the first set position of the first transmission rack 132 of the first transmission assembly 13 (corresponding to the initial position where the firing rod 21 is not moved and the end execution assembly 30 is in the jaw open state). The first circuit board 66 includes a third position sensor 694 for detecting the second set position of the first transmission rack 132 of the first transmission assembly 13 (corresponding to the firing position where the firing rod 21 is in the firing completion position and the end execution assembly 30 is in the jaw closed state), a fourth position sensor 695 for detecting the second set position of the first transmission rack 132 of the first transmission assembly 13 (corresponding to the firing position where the firing rod 21 is in the firing completion position and the end execution assembly 30 is in the jaw closed state), and a fifth position sensor 696 for detecting the initial position of the second transmission rack 142 of the second transmission assembly 14 (the position where the extension direction of the end execution assembly 30 is the same as the extension direction of the elongated body assembly 20). The sensors 693, 694, 695, 696 are electrically connected to the second electrical connection portion 690, and transmit their detection signals to the first circuit board 66 through the second electrical connection portion 690.

[0078] In a specific embodiment of the electric surgical instrument 100 of the present application, Fig.17 , Fig.18a , 18b As shown, it also includes an installation safety 50, which is used to cooperate with the distal end of the slender body assembly 20 before loading the end execution assembly 30, so that the first transmission assembly 13 in the first part 11a is maintained in an initial set position, in which the firing rod 21 is located in an unfired initial position, and the bending connecting rod 22 is in a position (non-bending position) that allows the end execution assembly 30 to extend along the longitudinal axis direction.

[0079] like Fig.17 , Fig.18a , 18bAs shown, the installation safety 50 comprises: a main body 51 which can be inserted into the tubular housing end of the support member 24, and a plugging hole 52 suitable for the firing rod 21 to be plugged in is arranged inside the main body 51 of the installation safety 50; a first limiting structure for limiting the axial installation position of the main body 51 is arranged between the main body 51 and the support member 24, and a second limiting structure for limiting the axial relative position between the main body 51 and the firing rod 21 is arranged between the main body 51 and the firing rod 21. Before loading the end actuator 30, by inserting the installation safety 50 into the distal end of the elongated body assembly 20, that is, after mating with the tubular housing of the support member 24, the first limiting structure limits the axial plugging position of the installation safety 50, and after mating, the installation safety 50 is mated with the firing rod 21 through the second limiting structure, so that the firing rod 21 moves axially to the first set position, so that the first transmission assembly 13 in the first part 11a is located at a position capable of mating with the first driving mechanism 610 in the power unit 60.

[0080] Specifically, Fig. 20 , Fig.21 As shown, the first limiting structure includes at least one first limiting protrusion 511 arranged on the outer peripheral surface of the middle area of ​​the main body 51 of the installation safety 50, and a first limiting groove 24a correspondingly arranged on the inner wall of the tubular shell of the support member 24; the inner wall of the tubular shell of the support member 24 is provided with a second limiting groove 24b between the distal end surface and the first limiting groove 24a, and the first limiting protrusion 511 on the main body 51 axially slides along the second limiting groove 24b and is inserted into the first limiting groove 24a to achieve its axial limiting. The first limiting groove 24a extends along the circumferential direction at a set angle, and the main body 51 of the installation safety 50 is rotated to set an angle so that it abuts against the side wall of the first limiting groove 24a extending along the circumferential direction, so as to achieve the fixing of the circumferential position of the main body 51 and the support member 24.

[0081] like Fig. 20 , Figure 21-23 As shown, the distal end of the firing rod 21 has a necked section 21a, and the firing rod 21 is provided with a rotating convex edge 21b on the distal side of the necked section 21a, and the rotating convex edge 21b has a notch structure. A second limiting protrusion 512 is correspondingly provided on the inner wall surface of the main body 51. When the main body 51 is inserted into the distal end of the slender body assembly 20, the second limiting protrusion 512 enters the necked section 21a along the notch portion of the rotating convex edge 21b, and abuts against the proximal end surface of the necked section 21a, thereby limiting the axial position of the main body 51 and the firing rod 21. When the firing rod 21 deviates from the initial position, the second limiting protrusion 512 of the main body 51 pushes the firing rod 21 to move toward the handle assembly 10 until it moves to the initial position of the firing rod 21.

[0082] In order to facilitate the rotation of the main body 51 , the installation safety 50 is provided with a lever handle 53 on its distal outer side wall. The lever handle 53 is integrally formed with the main body 51 and is formed as a sheet structure extending radially along the main body 51 .

[0083] On the basis of the above embodiment, the installation safety 50 further includes an anti-disassembly structure, so that before the transmission assembly 13 is assembled with the drive mechanism of the power unit 60, the installation safety 50 cannot be disassembled, thereby ensuring that the transmission assembly 13 is kept in the initial setting position when assembled with the drive mechanism. In the initial setting position, the transmission assembly 13 is in an initial state suitable for engaging with the drive mechanism of the power unit 60.

[0084] Specific as Figure 24-28 As shown, the anti-disassembly structure of the installation safety 50 includes a limiting groove 510, which is arranged on the side wall of the main body 51, extends to the proximal end surface of the main body 51 and defines an opening on the proximal end surface of the main body 51. Further, the anti-disassembly mechanism also includes a boss 220 arranged at the distal end of the bending link 22, and the boss 220 protrudes from the side of the bending link 22. The limiting groove 510 is suitable for accommodating the boss 220 to limit the circumferential movement of the installation safety 50 relative to the slender body assembly 20.

[0085] Next, the assembly process of the installation safety 50 and the handle assembly 10 described in the embodiment of the present invention will be described in detail. The installation safety 50 is installed at the distal end of the slender body assembly 20 of the handle assembly 10 in a manner of insertion and rotation. When the installation safety 50 is inserted into the distal end of the slender body assembly 20, the installation safety 50 is rotated, and the firing rod 21 is engaged with the plug-in hole 52 of the installation safety 50 through the second limiting structure. At this time, the boss 220 on the bending connecting rod 22 is aligned with the limiting groove 510 on the installation safety 50 to facilitate matching. Subsequently, the bending connecting rod 22 moves axially distally so that the boss 220 slides from the opening on the end face of the main body 51 to the limiting groove 510. The boss 220 is engaged in the limiting groove 510 to circumferentially limit the installation safety 50 to prevent the installation safety 50 from rotating. The assembled installation safety 50 and the bending connecting rod 22 are as shown in FIG. Fig.25 shown.

[0086] The embodiment of the present invention can effectively prevent the installation safety 50 from rotating by engaging the boss 220 on the bending connecting rod 22 into the anti-rotation groove 510. If the installation safety 50 cannot rotate, the firing rod 21 cannot be rotated away from the installation safety 50, thereby ensuring that before the power unit 60 is installed on the handle assembly 10, the operator cannot remove the installation safety 50, thereby keeping the firing rod 21 and the bending connecting rod 22 in their initial positions, thereby ensuring smooth assembly between the power unit 60 and the handle assembly 10.

[0087] When the handle assembly 10 and the power unit 60 are installed in place, the bending link 22 is operated to move a certain distance proximally, so that the boss 220 withdraws from the limiting groove 510, releasing the rotation restriction on the installation safety 50 to allow the user to remove the installation safety 50 from the handle assembly 10.

[0088] As an optional embodiment, a damping protrusion 514 is provided on the groove wall of the limiting groove 510, and a damping groove 221 is provided on the boss 220. When the boss 220 is inserted into the limiting groove 510, the damping protrusion 514 is inserted into the damping groove 221. Fig.24 As shown, by inserting the damping protrusion 514 into the damping groove 221, the force required for the boss 220 to be separated from the limiting groove 510 can be increased, thereby preventing the boss 220 from being separated from the limiting groove 510 in an abnormal state, and increasing the stability of the connection between the installation safety 50 and the bending connecting rod 22. As an optional embodiment, Fig.24 As shown, the damping protrusion 514 includes a damping surface located in the limiting groove 510, and the damping surface is an arc surface, through which the damping protrusion 514 is inserted into the damping groove 221. The present invention sets the damping surface as an arc surface, which is conducive to reducing the resistance encountered when the damping protrusion 514 is inserted into the damping groove 221, and facilitates the damping protrusion 514 to be separated from the damping groove 221 when the bending connecting rod 22 retreats.

[0089] As an optional embodiment, Fig.25 , 27b As shown, the bottom wall of the damping groove 221 is a concave arc surface, and the arc surface fits the damping surface. The embodiment of the present invention is conducive to increasing the contact area between the damping protrusion 514 and the damping groove 221 and the fit at the contact position, so as to improve the stability of the damping protrusion 514 in the damping groove 221.

[0090] As an optional embodiment, the two connection points of the damping surface along the axial direction with the groove wall of the limiting groove 510 are respectively the first damping point 515 and the second damping point 516, and the first damping point 515 and the second damping point 516 are respectively abutted against the first damping groove wall and the second damping groove wall which are arranged oppositely on the damping groove 221. The first damping point 515 and the second damping point 516 are respectively abutted against the first damping groove wall and the second damping groove wall on the damping groove 221, and the first damping point 515 and the second damping point 516 are respectively abutted against the first damping groove wall and the second damping groove wall to increase the stability of the damping protrusion 514 when it is limited in the damping groove 221, thereby improving the stability of the boss 220 arranged in the limiting groove 510.

[0091] As an optional embodiment, the bending connecting rod 22 is provided with an embedding groove 222, and the boss 220 is installed in the embedding groove 222. Figure 27b As shown, the embedded groove 222 provides local limiting and installation functions for the boss 220, increases the structural stability of the boss 220 set on the bending link 22, and at the same time avoids the boss 220 and the bending link 22 from occupying additional space at the connection, thereby improving the compactness of the structure.

[0092] As an optional embodiment, the embedding groove 222 includes a guide groove wall 223, the guide groove wall 223 is located at the distal end of the embedding groove 222, and a guide slope 224 is formed on the top surface of the guide groove wall 223, and the guide slope 224 extends to the distal side surface of the guide groove wall 223. Figure 27b As shown, the guide slope 224 can play a guiding role when the bending link 22 is inserted into the installation safety 50 or the end execution assembly 30, and is also conducive to the precise assembly of the bending link 22 and the installation safety 50 or the end execution assembly 30.

[0093] As an optional embodiment, Fig.26 , 27b As shown in Figures 28 and 28, the bending connecting rod 22 further includes a hooking portion 22a, which is located at the front end of the embedding groove 222 and is used to be hooked on the bending actuator of the end actuator 30 when the slender body assembly 20 is connected to the end actuator 30. In the embodiment of the present invention, the hooking portion 22a is hooked on the bending actuator to drive the bending actuator to bend, and the embedding groove 222 located behind the hooking portion 22a avoids the bending actuator to prevent position interference.

[0094] As an optional embodiment, the handle assembly 10 and the power unit 60 are detachably adapted; when the handle assembly 10 and the power unit 60 are installed in place, the bending link 22 is operated to move a distance proximally, so that the boss 220 withdraws from the limiting groove 510, and the circumferential rotation restriction of the slender body assembly 20 on the installation safety 50 is released, so that the installation safety 50 can be removed. In the embodiment of the present application, when the handle assembly 10 and the power unit 60 are installed in place, the bending link 22 is operated to move a distance proximally to drive the boss 220 to withdraw from the limiting groove 510, so that the installation safety 50 can be rotated and removed, and the removal process is simple and reliable.

[0095] 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. An electric surgical instrument, comprising: a handle assembly operable to provide a driving force to the end effector assembly; an elongated body assembly defining a longitudinal axis and transmitting actuation forces provided by the handle assembly; Characterized in that the handle assembly comprises: a first portion, wherein at least one transmission assembly is disposed within the first portion and the transmission assembly is operably engaged with the elongated body assembly to transmit a driving force; a power unit, the power unit being detachably mounted on the first portion of the handle assembly, and comprising at least one set of drive mechanisms, the drive mechanisms being operably engaged with the transmission assembly of the first portion; A mounting safety adapted to cooperate with the distal end of the elongated body assembly so that the transmission assembly of the first portion is in an initial state adapted to engage with the drive mechanism of the power unit, wherein the mounting safety further comprises an anti-disassembly structure for limiting the circumferential movement of the mounting safety relative to the elongated body assembly when the transmission assembly is not engaged with the drive mechanism of the power unit; The installation safety device includes a main body, and the anti-disassembly structure includes a limiting groove arranged on the side wall of the main body; the limiting groove is suitable for accommodating a boss at the far end of the bending connecting rod arranged in the slender body component to limit the circumferential movement of the installation safety device relative to the slender body component.

2. The electric surgical instrument according to claim 1, characterized in that: A damping protrusion is arranged on the groove wall of the limiting groove, and a damping groove is opened on the boss. When the boss is inserted into the limiting groove, the damping protrusion is inserted into the damping groove.

3. The electric surgical instrument according to claim 2, characterized in that: The damping protrusion comprises a damping surface located in the limiting groove, the damping surface is an arc surface, and the damping protrusion is inserted into the damping groove through the damping surface.

4. The electric surgical instrument according to claim 3, characterized in that: The groove bottom wall surface of the damping groove is a concave arc surface, and the arc surface is in contact with the damping surface.

5. The electric surgical instrument according to claim 3, characterized in that: Two connection points of the damping surface along the axial direction with the groove wall of the limiting groove are respectively the first damping point and the second damping point, and the first damping point and the second damping point are respectively abutted against two groove walls arranged oppositely on the damping groove.

6. The electric surgical instrument according to claim 1, characterized in that: The bending connecting rod is provided with an embedding groove, the boss is installed in the embedding groove, and two side surfaces oppositely arranged at one end of the boss are respectively abutted against two groove walls oppositely arranged at the embedding groove.

7. The electric surgical instrument according to claim 6, characterized in that: The embedding groove comprises a guide groove wall, the guide groove wall is located at the distal end of the embedding groove, a guide slope is formed on the top surface of the guide groove wall, and the guide slope extends to the distal side surface of the guide groove wall.

8. The electric surgical instrument according to claim 6, characterized in that: The bending connecting rod also includes a hooking portion, which is located at the front end of the embedding groove and is used to hook on the bending actuator of the end actuator when the slender body component is connected to the end actuator.

9. The electric surgical instrument according to any one of claims 1 to 8, characterized in that: The handle assembly is detachably adapted to the power unit; when the handle assembly and the power unit are installed in place, the bending connecting rod is operated to move a certain distance proximally, so that the boss withdraws from the limiting groove, thereby releasing the circumferential rotation restriction of the slender body assembly on the installation safety, so that the installation safety can be removed.

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