End execution assembly matched with surgical instrument and surgical instrument

Abstract

The utility model discloses an end executing assembly matched with a surgical instrument and the surgical instrument, and belongs to the field of medical instruments. The end effector assembly includes a proximal body portion defining a longitudinal axis, including a turning member; the far-side executing part comprises a nail bin assembly and a nail anvil assembly which are used for clamping tissue, the far-side executing part is pivotally connected with the near-side main body part through a joint assembly, and the joint assembly comprises a near-side connecting piece fixedly connected to the far end of the near-side main body part; and the far-side connecting piece is fixedly connected to the near end of the far-side executing part, the far-side connecting piece is in meshed connection with the near-side connecting piece, a driving bending part is arranged on the far-side connecting piece, and the bending component operably drives the driving bending part to move so that the far-side executing part can be bent relative to the near-side main body part. The surgical instrument provided by the utility model can be adapted to the surgical operation in a narrow space.

Description

Technical Field

[0001] The utility model relates to the field of surgical instruments, in particular to a clamping, cutting and anastomosis surgical instrument and an end execution component thereof. Background Art

[0002] Surgical anastomosis instruments are used to perform tissue anastomosis and cutting operations and typically include a handle assembly, an elongated body, and an end effector assembly. During intraoperative use, the surgeon manipulates the handle assembly to bend the end effector assembly relative to the elongated body assembly to a certain angle to accommodate different tissue cutting and anastomosis positions. In certain surgical environments, it is often necessary for the end effector assembly to provide a larger bending angle to achieve a smaller incision and fewer staple locations, thereby reducing the probability of anastomotic leakage.

[0003] In order to increase the bending angle of the end effector assembly, the existing design uses double joints or even multiple joints to achieve large-angle bending of the end effector assembly. Although it can provide a larger bending angle due to the progressive bending of multiple pivot axes, it also increases the length of the joint part and the bending radius of the end effector assembly, and it still cannot adapt to narrow surgical environments such as the pelvic cavity. Utility Model Content

[0004] To this end, the present invention proposes an end execution assembly adapted for a surgical instrument and a surgical instrument. The end execution assembly has a small bending radius and can adapt to a narrow operating space.

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

[0006] 14. The invention relates to an end execution assembly adapted for a surgical instrument, comprising: a proximal main body portion, the proximal main body portion defining a longitudinal axis and including a bending member; a distal execution portion comprising a nail magazine assembly and a nail anvil assembly for clamping tissue, the distal execution portion being pivotally connected to the proximal main body portion via a joint assembly, and characterized in that the joint assembly comprises: a proximal connecting member fixedly connected to the distal end of the proximal main body portion; a distal connecting member fixedly connected to the proximal end of the distal execution portion, the distal connecting member being meshedly connected to the proximal connecting member, a driving bending portion being provided on the distal connecting member, and the bending member being operably driven to move the driving bending portion so as to cause the distal execution portion to bend relative to the proximal main body portion.

[0007] In some embodiments of the present invention, the engaging position of the distal connecting member and the proximal connecting member forms a pivot point, the pivot point defines a pivot axis, the distal actuator bends around the pivot axis relative to the proximal main body, the thickness direction of the distal area of ​​the bending member is perpendicular to the pivot axis, the width direction of the distal area of ​​the bending member is parallel to the pivot axis, and the thickness of the bending member is less than the width.

[0008] In some embodiments of the present invention, the bending member includes a fixed pull tab and a deformable pull tab, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab and can slide a first set distance relative to it along the longitudinal axis, and the distal end of the deformable pull tab is fixedly connected to the driving bending portion of the distal connecting member.

[0009] In some embodiments of the present invention, the engaging position of the distal connecting member and the proximal connecting member forms a pivot point, the pivot point defines a pivot axis, the distal actuator portion bends around the pivot axis relative to the proximal main body portion, the width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is less than the width.

[0010] In some embodiments of the present invention, the driving bending portion includes a socket formed on the distal connecting piece, and the distal end of the deformable pull tab has a hooking protrusion, which is plugged into and fits with the socket.

[0011] In some embodiments of the present invention, the end of the hooking protrusion has an extension edge, and when the hooking protrusion is inserted into the insertion hole, the extension edge of the hooking protrusion is located outside the upper edge of the insertion hole.

[0012] In some embodiments of the present invention, the proximal end of the deformable pull tab and the distal end of the fixed pull tab are slidably plugged into each other, comprising a sliding slot provided on one of the deformable pull tab and the fixed pull tab, the sliding slot extending along the longitudinal axis, and a sliding protrusion provided on the other of the deformable pull tab and the fixed pull tab, the sliding protrusion being plugged into the sliding slot and having a sliding gap of a first set distance between the two along the longitudinal axis.

[0013] In some implementations of the present invention, the length of the free end portion of the sliding protrusion located outside the sliding slot is greater than the length of the sliding slot.

[0014] In some embodiments of the present invention, the proximal main body includes an outer sleeve and a support body located inside the outer sleeve, and the bending member is installed on the support body.

[0015] In some embodiments of the present invention, the support body has a notch extending substantially along the longitudinal axis in a partial area close to the proximal connector, and the deformable pull tab is installed in the notch.

[0016] In some embodiments of the present invention, the supporting body is provided with a limiting protrusion in the notch area, and the limiting protrusion is parallel to the side wall of the notch. When the distal executive portion bends relative to the proximal main body portion, at least one side surface of the deformable pull tab abuts against the limiting protrusion or the side wall of the notch.

[0017] In some embodiments of the present invention, the notch includes a first area, a transition area and a second area from the proximal end to the distal end, the width of the first area is smaller than the width of the second area, and the limiting protrusion is arranged parallel to and opposite to part of the side wall of the second area of ​​the notch.

[0018] In some embodiments of the present invention, the proximal main body portion further includes a firing member, and the joint assembly further includes a retaining member, which is pivotally connected to the proximal connecting member and the distal connecting member respectively, and the retaining member has a retaining channel for accommodating the firing member.

[0019] In some embodiments of the present invention, a proximal pivot axis and a distal pivot axis are respectively provided on the retaining member; the proximal pivot axis of the retaining member is pivotally engaged with the proximal pivot hole of the proximal connecting member, and the distal pivot axis of the retaining member is pivotally engaged with the distal pivot hole of the distal connecting member.

[0020] In some embodiments of the present invention, the joint assembly also includes a first connecting plate, which is provided with two connecting holes. The proximal pivot axis and the distal pivot axis of the retaining member respectively pass through the proximal pivot hole of the proximal connecting member and the distal pivot hole of the distal connecting member and are riveted to the connecting holes of the first connecting plate.

[0021] In some embodiments of the present invention, when the end actuator is in the loading position, the distal actuator has an angle with the longitudinal axis that is not 0°; when the end actuator is in the loading position, the bending member is operably moved from the distal side to the proximal side to drive the drive bending member to move, so that the bending angle of the distal actuator becomes larger; the bending member is operably moved from the proximal side to the distal side to drive the drive bending member to move, so that the bending angle of the distal actuator becomes smaller, until it is extended along the longitudinal axis.

[0022] In some embodiments of the present invention, when the end execution assembly is in the loading position, the distal execution portion extends along the longitudinal axis; when the distal execution portion is arranged along the longitudinal axis, the bending member is operably moved from the distal side to the proximal side to drive the drive bending portion to move, so that the distal execution portion deviates from the longitudinal axis and bends in a first direction; the bending member is operably moved from the proximal side to the distal side to drive the drive bending portion to move, so that the distal execution portion deviates from the longitudinal axis and bends in a second direction.

[0023] In some embodiments of the present invention, when the end actuator is in the loading position, the distal actuator extends along the longitudinal axis; when the distal actuator is set along the longitudinal axis, the bending member is operable to move from the distal side to the proximal side, so as to drive the bending portion to move and increase the bending angle of the distal actuator; when the distal actuator is in a bent state, the bending member is operable to move from the proximal side to the distal side, so as to drive the bending portion to move and decrease the bending angle of the distal actuator until it is extended along the longitudinal axis.

[0024] In some embodiments of the present invention, the proximal main body also includes a locking member rotatably mounted on its proximal side, and the locking member includes a first locking portion. When the end execution assembly is in the loading position, the first locking portion cooperates with the bending member to lock the bending member.

[0025] Some embodiments of the present invention also provide an end execution assembly adapted for a surgical instrument, comprising: a distal execution portion, comprising a nail magazine assembly and a nail anvil assembly for clamping tissue; a proximal main body portion, the proximal main body portion defining a longitudinal axis, comprising a support body and a bending member mounted on the support body, the bending member being slidable and retractable relative to the support body along the longitudinal axis by a first set distance; and a joint assembly located between the distal execution portion and the proximal main body portion, the joint assembly comprising: a proximal connector fixedly connected to the distal end of the proximal main body portion; a distal connector fixedly connected to the proximal end of the distal execution portion, the distal connector being engaged with the proximal connector, a driving bending portion being provided on the distal connector, the bending member being operably driven to drive the driving bending portion to move so that the distal execution portion is bent relative to the proximal main body portion around a position at which the two are engaged.

[0026] In some embodiments of the present invention, the bending member includes a fixed pull tab and a deformable pull tab, the fixed pull tab is fixedly connected to the supporting body, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab and can slide a first set distance relative to it along the longitudinal axis direction, and the distal end of the deformable pull tab is fixedly connected to the driving bending portion of the distal connecting member.

[0027] In some embodiments of the present invention, the joining position of the distal connecting member and the proximal connecting member forms a pivot point, the pivot point defines a pivot axis, the distal execution portion bends around the pivot axis relative to the proximal main body portion, the width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is less than the width.

[0028] Some embodiments of the present invention also provide an end effector assembly adapted for a surgical instrument, comprising: a distal effector portion including a staple cartridge assembly and a staple anvil assembly for clamping tissue; a proximal body portion defining a longitudinal axis and comprising a support body and a bending member mounted on the support body; and a joint assembly located between the distal effector portion and the proximal body portion, the joint assembly comprising: a proximal connector fixedly connected to the distal end of the proximal body portion; a distal connector fixedly connected to the proximal end of the distal effector portion, the distal connector being engaged with the proximal connector, and a joint portion formed at the engagement portion thereof, the pivot portion defining a pivot axis, a driving bending portion being provided on the distal connector, the bending member being operable to drive the driving bending portion to move so as to cause the distal effector portion to bend relative to the proximal body portion about the pivot axis, the thickness direction of the distal end region of the bending member being perpendicular to the pivot axis, the width direction of the distal end region of the bending member being parallel to the pivot axis, and the thickness of the bending member being less than the width.

[0029] In some embodiments of the present invention, the bending member includes a fixed pull tab and a deformable pull tab, the fixed pull tab is fixedly connected to the supporting body, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab, the width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is smaller than the width.

[0030] The utility model also provides a surgical instrument, comprising a handle assembly, a slender body assembly and the above-mentioned end execution assembly which are sequentially connected from the proximal end to the distal end.

[0031] The technical solution of the utility model has the following technical effects compared with the existing technology:

[0032] In the surgical instrument and its end effector assembly provided by the present invention, a joint assembly forms a distal actuator pivot point through the intermeshing of a proximal connector and a distal connector, enabling large-angle bending with a small bending radius. Furthermore, a driving bending portion is provided on the distal connector, spaced apart from the pivot point. This reduces the driving force for bending under the same bending torque, making it easier to achieve actuated bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 This is a structural schematic diagram of a specific embodiment of the surgical instrument of the present utility model;

[0035] Figure 2 This is a structural diagram of a specific embodiment of the end effector assembly of the present utility model;

[0036] Figure 3 An exploded view of a specific embodiment of the end effector assembly of the present invention;

[0037] Figure 4 An exploded view of a portion of the structure of a specific embodiment of the end effector assembly of the present invention;

[0038] Figure 5 This is a schematic structural diagram of the distal end connector of the surgical instrument of the present invention;

[0039] Figure 6 This is a schematic diagram of a specific embodiment of a bending member in a surgical instrument of the present invention;

[0040] Figure 7 This is a schematic diagram of a specific embodiment of the second half support body of the surgical instrument of the present invention;

[0041] Figure 8 This is a schematic diagram of a specific embodiment of the first half support body of the surgical instrument of the present invention;

[0042] Figure 9 This is a schematic diagram of a distal actuator extending along the longitudinal axis in a specific embodiment of the end actuator assembly of the present invention;

[0043] Figure 10 It is a schematic diagram of a portion of the joint assembly when the distal actuator of the present invention is along the longitudinal axis;

[0044] Figure 11A This is a schematic diagram of the distal actuator of the surgical instrument of the present invention when bent to the maximum bending angle;

[0045] Figure 11B This is a schematic diagram of the distal actuator of the surgical instrument of the present invention when bent to the maximum bending angle;

[0046] Figure 12 Another schematic diagram of a portion of the joint assembly of the distal actuator of the present invention at the maximum bending angle;

[0047] Figure 13A This is a structural diagram of the end effector assembly of the present invention in an unloaded state;

[0048] Figure 13B This is another structural schematic diagram of the end effector assembly of the present invention in an unloaded state;

[0049] Figure 14 It is a schematic diagram of a portion of the joint assembly of the end effector assembly of the present invention in an unloaded state;

[0050] Figure 15 This is a schematic diagram of another embodiment of the end effector assembly of the present invention, wherein the distal effector portion extends along the longitudinal axis;

[0051] Figure 16 for Figure 15 A magnified view of some structures;

[0052] Figure 17 This is a schematic diagram of the connection between the end execution assembly and the slender body assembly of the present invention;

[0053] Figure 18 This is a schematic structural diagram of the locking member of the end actuator assembly of the present invention;

[0054] Figure 19 This is a structural schematic diagram of the locking member of the end actuator assembly of the present invention in the locked position;

[0055] Figure 20 This is a structural schematic diagram of the locking member of the end execution assembly of the present invention in the unlocked position. DETAILED DESCRIPTION

[0056] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0057] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0059] 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.

[0060] 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 that is close to the operator when the surgical instrument is operated.

[0061] The following is a specific embodiment of a surgical instrument. Generally speaking, the embodiment of the surgical instrument described herein is an endoscopic surgical cutting and stapling instrument. However, it should be noted that the surgical instrument can also be a non-endoscopic surgical cutting and stapling instrument, such as an open surgical instrument used in open surgery.

[0062] Figure 1 The present invention shows a specific embodiment of a surgical instrument 100, which includes a handle assembly 10, an elongated body assembly 20, and an end effector assembly 30. The handle assembly 10 is adapted to allow an operator to manipulate the surgical instrument 100. The handle assembly 10 can control the movement of the end effector assembly 30 via the elongated body assembly 20 to perform surgical operations, such as clamping / closing, suturing / anastomosis, and cutting tissue.

[0063] The handle assembly 10 includes a handle housing 11 that can be gripped by a user in a conventional manner. In one embodiment, the surgical instrument 100 uses a trigger to control the closing and firing of the end effector assembly 30. In another embodiment, the surgical instrument 100 can also use a push button or other means provided on the handle to control the closing and firing of the end effector assembly 30, so that the end effector assembly 30 performs cutting and suturing operations. In other alternative embodiments, the surgical instrument 100 can also use a trigger, push button or other means provided on the handle assembly 10 to control the opening of the jaws of the end effector assembly 30 to release tissue. The handle housing 11 is generally T-shaped and includes a main body extending along a longitudinal axis C and a grip portion extending in a direction generally perpendicular to the longitudinal axis C or at an angle relative to the longitudinal axis C. The main body and grip portion define a mounting space for the drive mechanism.

[0064] The elongated body assembly 20 includes a tubular housing defining a longitudinal axis C; a transmission rod assembly (not shown) is disposed within the tubular housing, the proximal end of the transmission rod assembly being connected to the output end of the drive mechanism within the handle assembly 10, as shown in FIG. Figure 3 As shown, its distal end is connected to the firing member 35 and the bending member 36 of the end effector 30, and is used to transmit the driving force of the drive mechanism to the end effector 30. Specifically, the transmission rod assembly includes a firing rod and a bending drive rod. The firing rod is used to transmit the driving force of the firing drive to the firing member 35 of the end effector 30, thereby achieving the firing operation of the end effector 30. The bending drive rod is used to transmit the driving force of the bending drive assembly to the bending member 36 of the end effector 30, thereby achieving the bending of the end effector 30.

[0065] like Figure 1 As shown, the surgical instrument 100 described in the embodiment of the present invention also includes a rotating head 13, which is installed on the distal side of the handle assembly 10 and is provided at the proximal end of the slender body assembly 20. When the rotating head 13 is operated to rotate around the longitudinal axis C of the surgical instrument 100, it can drive the slender body assembly 20 and the end execution assembly 30 to rotate together.

[0066] The end effector assembly 30 is used to operate tissue to perform specific surgical operations, such as clamping, suturing / anastomosis, cutting, etc. In order to achieve the bending angle of the end effector assembly 30 relative to the longitudinal axis C of the elongated body assembly 20, as shown in FIG. Figure 2 As shown, the end effector assembly 30 includes a proximal body portion 30a and a distal effector portion 30b, which are pivotally connected via a joint assembly 38. Accordingly, the surgical instrument 100 further includes a bending drive assembly for driving the joint assembly 38 to bend, and a bending transmission assembly, the bending transmission assembly including a bending member 36, which is operably connected to the bending drive assembly. Figure 1 As shown, the bending drive assembly includes a bending knob 12 mounted on a rotating head 13 and a bending drive rod (not shown) located within the elongated body assembly 20. The bending drive rod is connected to the bending member 36. The operator rotates the bending knob 12 to drive the bending drive rod to move. Specifically, when the bending knob 12 is rotated clockwise from its initial position, the bending drive rod drives the bending member 36 toward the distal end; when the bending knob 12 is rotated counterclockwise from its initial position, the bending drive rod drives the bending member 36 toward the proximal end; and vice versa.

[0067] The following combination Figure 2 、 Figure 3A specific embodiment of the end effector assembly 30 of the surgical instrument 100 of the present invention is described in detail. The end effector assembly 30 is removably mounted on the distal end of the elongated body assembly 20 of the surgical instrument 100. For example, the proximal body portion 30a of the end effector assembly 30 can be inserted into the elongated body assembly 20 and rotated relative to the housing of the elongated body assembly 20 to lock the end effector 30 thereto. The distal effector portion 30b includes a cartridge assembly 31 and an anvil assembly 32. The cartridge assembly 31 and the anvil assembly 32 are movable relative to each other to close the jaws and thereby clamp tissue. The opposing surfaces of the cartridge assembly 31 and the anvil assembly 32 form a clamping surface for clamping tissue. In one specific embodiment, the anvil assembly 32 is operable to pivot toward the cartridge assembly 31 to close the jaws of the end effector 30 to clamp tissue; and then pivot away from the cartridge assembly 31 to open the jaws of the end effector 30 to release tissue. As an alternative embodiment, the staple cartridge assembly 31 of the end effector assembly 30 can be operated to pivot toward the anvil assembly 32 until the jaws of the end effector assembly 30 are closed to clamp tissue; and the staple cartridge assembly 31 can be operated to pivot away from the staple cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release tissue.

[0068] Reference Figure 3 As shown, in the distal actuator portion 30b of the end effector assembly 30, the staple cartridge assembly 31 includes a staple cartridge 312, a staple cartridge base 311, and a staple pusher slide 313 disposed within a cavity between the staple cartridge 312 and the staple cartridge base 311. The proximal end of the firing member 35 located within the proximal body portion 30a is connected to the firing rod within the elongated body assembly 20, while the distal end of the firing member 35 abuts against the staple pusher slide 313 and can slide / move integrally along the longitudinal axis to perform the corresponding surgical operation. The staple cartridge assembly 31 also includes a staple pusher 314 and staples 315 located within the staple cartridge 312. When the firing member 35 is driven from the proximal end to the distal end, it pushes the staple pusher slide 313 to move. The staple pusher slide 313 acts on the staple pusher 314 to push the staples 315 out of the staple cartridge 312, thereby completing the tissue anastomosis operation. The anvil assembly 32 includes an anvil shell 321 and a stapler seat body located inside the anvil shell 321. The stapler seat body cooperates with the staple magazine 312 to realize the bending operation of the suture staple 315. The surface of the stapler seat body is provided with a plurality of staple buds, and the staple buds correspond one-to-one to the positions of the staple holes on the staple magazine 312. When tissue is anastomosed, the suture staple 315 in the staple hole abuts against the staple buds.

[0069] Specifically, if Figure 2 and Figure 3As shown, the proximal main body portion 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 portion 30a includes a slender outer tube 33, a support body 34 disposed in the outer tube 33, a firing member 35 slidably disposed in the support body 34, and a bending member 36; wherein the outer tube 33 has a longitudinal axis C extending in the same direction as the tubular outer shell of the slender body assembly 20; the support body 34 includes a first half support body 34a and a second half support body 34b, and the relative surfaces of the first half support body 34a and the second half support body 34b are arranged parallel to the clamping surface, and the proximal end of the second half support body 34b includes a coupling portion 34c for connecting to the slender body assembly 20, and a coupling lug is provided on the coupling portion 34c for releasably coupling to the slender body assembly 20 in a snap-on connection manner. Specifically, a connecting piece 36a is provided at the proximal end of the bending member 36 of the end execution assembly 30, which cooperates with the hook at the distal end of the bending drive rod located inside the slender body assembly 20. A firing connecting piece 353 is provided at the proximal end of the firing member 35 in the end execution assembly 30, which cooperates with the distal end of the firing rod of the slender body assembly 20, thereby realizing the rotational connection and locking of the end execution assembly 30 and the slender body assembly 20.

[0070] The firing member 35 includes an elongated firing beam 351, which can be constructed from a single sheet of material or from multiple stacked sheets. The working portion 352 of the firing member 35 is shaped like an I-beam, a portion of which contacts the staple pusher slider 313 and can slide integrally toward the distal end of the staple cartridge assembly 31 to perform a corresponding surgical procedure. For example, when the firing member 35 is driven from the proximal end to the distal end, a portion of the working portion 352 of the firing member 35 pushes the staple pusher slider 313 distally. The staple pusher slider 313 acts on the staple driver to push the staples out of the staple cartridge assembly 31, completing the tissue anastomosis. Simultaneously, the cutting blades on the working portion 352 cut the tissue. The proximal end of the firing beam 351 is hooked and connected to the firing connector 353. Specifically, the proximal end of the firing connector 353 is provided with an aperture configured to receive the distal end of the firing rod when the proximal end of the end effector assembly 30 is engaged with the elongated body assembly 20.

[0071] Furthermore, in the end effector assembly 30 according to the embodiment of the present invention, a guide groove 341 for slidably receiving the firing member 35 is defined between the first half support body 34a and the second half support body 34b (see Figure 7 、 Figure 8The firing member 35 includes an elongated firing beam 351 that is slidably connected to the guide slot 341. The guide slot 341 extends along the longitudinal axis and penetrates the extended area of ​​the first half support body 34a and the second half support body 34b, so that both the proximal and distal ends of the support body 34 can limit the firing beam 351.

[0072] Reference Figure 3 、 Figure 4 As shown, the joint assembly 38 includes proximal connectors 381a and 381b fixedly connected to the distal end of the proximal main body 30a, and distal connectors 382a and 382b fixedly connected to the distal actuator 30b. Specifically, the proximal connectors 381a and 381b are integrally formed with the support body 34 by processes such as welding and injection molding. Alternatively, in an alternative embodiment, the proximal connectors 381a and 381b can be fixedly connected to the support body 34 by a matching structure of a positioning protrusion and a positioning slot. The distal connectors 382a and 382b are fixedly connected to the distal actuator 30b by a positioning pin. Figure 4 As shown, the distal ends of the proximal connecting members 381a, 381b and the proximal ends of the distal connecting members 382a, 382b have toothed structures that are meshed with each other, and the meshing position of the two forms a pivot point A of the distal actuator 30b, wherein the pivot point A defines a pivot axis B, and the distal actuator 30b can swing around the pivot axis B relative to the proximal main body 30a, and the position of the pivot axis B changes with the meshing position of the proximal connecting members 381a, 381b and the distal connecting members 382a, 382b, but the pivot axis B is always perpendicular to the longitudinal axis C. The distal connecting members 382a and 382b are provided with at least one driving bending portion 383 connected to the bending member 36. When the bending member 36 slides relative to the support body 34, it can directly or indirectly act on the driving bending portion 383 of the distal connecting member 382a, so that the distal connecting member 382a can swing around the meshing position (i.e., the pivot axis B) between the proximal connecting members 381a and 381b and the distal connecting members 382a and 382b under the action of the meshing teeth, thereby realizing the bending of the distal actuator 30b relative to the proximal main body 30a. When the distal actuator 30b extends along the longitudinal axis C (refer to Figure 4 As shown), the driving bend portion 383 is spaced apart from the longitudinal axis C and is located at the distal end of the pivot point A, that is, the driving bend portion 383 does not coincide with the longitudinal axis C.

[0073] Other joint connection methods can also be used between the proximal connecting members 381a, 381b and the distal connecting members 382a, 382b to achieve the bending or swinging of the distal connecting members 382a, 382b around the proximal connecting members 381a, 381b. At the same time, the two can provide relatively stable support, so that the joint is in the process of firing the surgical instrument and the shaking caused by the bending or swinging is reduced to avoid pulling and damaging the tissue. In a specific embodiment, referring to Figure 15 、 Figure 16 As shown, the areas opposite to the proximal connecting members 381a, 381b and the distal connecting members 382a, 382b are respectively provided with coupling parts, and the coupling parts are friction wheels with relatively large friction force. The proximal connecting members 381a, 381b and the distal connecting members 382a, 382b are connected through a connecting piece 385' having a groove / crack, and the connecting piece 385' is constructed in the form of a spring sheet with a certain amount of elastic deformation, which can expand or shrink its groove / crack under the action of external force to achieve elastic deformation. The connecting piece 385' is provided with two connecting holes, which are respectively connected to the proximal connecting parts 381a, 381b and the distal connecting parts 382a, 382b through pins. In the initial state, the distance between the two connecting holes of the connecting piece 385' is slightly smaller than the axial spacing between the proximal connecting parts 381a, 381b and the distal connecting parts 382a, 382b. After the connecting piece 385' is connected to the proximal connecting parts 381a, 381b and the distal connecting parts 382a, 382b respectively, the connecting piece 385' is stretched and deformed, and the contraction tension force is applied to the proximal connecting parts 381a, 381b and the distal connecting parts 382a, 382b, so that the proximal connecting parts 381a, 381b are in close contact with the distal connecting parts 382a, 382b, so as to increase the relative friction and ensure the positioning of the bending position of the distal connecting parts 382a, 382b.

[0074] In order to ensure the stability of the firing member 35 moving toward the distal end after the distal actuator 30b is bent relative to the proximal main body 30a, it is avoided that the bending force of the firing member 35 (i.e., the biasing force that bends and deforms the firing member 35) is too large, causing the problem of part of the sheet-like firing beam 351 popping out or stacking, such as Figure 3 、 Figure 4As shown, the joint assembly 38 also includes a retaining member 384 for accommodating the bending position of the firing member 35, and the retaining member 384 is connected to the mutually cooperating proximal connecting members 381a, 381b and distal connecting members 382a, 382b through two pivot shafts. The retaining member 384 is connected to the proximal pivot hole 51 of the proximal connecting members 381a, 381b through the proximal pivot shaft 41, and is connected to the distal pivot hole 52 of the distal connecting members 382a, 382b through the distal pivot shaft 42, so that it can pivot and swing relative to the proximal connecting members 381a, 381b around the proximal pivot shaft 41 along with the distal connecting members 382a, 382b. The joint assembly 38 also includes a first connecting plate 385, and the pivot shaft of the retaining member 384 and the end of the pivot shaft are riveted to the first connecting plate 385. Specifically, Figure 4 As shown, the first connecting piece 385 is provided with two connecting holes, and the ends of the proximal pivot axis 41 and the distal pivot axis 42 of the retaining member 384 are riveted to the connecting holes of the first connecting piece 385. The retaining member 384 has a retaining channel, and the axis connecting the proximal pivot axis 41 and the distal pivot axis 42 is located within the retaining channel. The retaining channel is suitable for accommodating at least a portion of the firing beam 351 of the firing member 35, so that the firing beam 351 is disposed within the retaining channel and can move along the extending direction thereof. The retaining channel of the retaining member 384 is constructed as an arc-shaped structure, with one side support wall of the retaining channel mating with the outer curved surface of the firing beam 351 at maximum bending, and the other side support wall is suitable for mating with the inner curved surface of the firing beam 351 at maximum bending.

[0075] The end effector assembly 30 described in this embodiment of the present invention features a joint assembly 38, wherein the proximal connectors 381a, 381b mesh with the distal connectors 382a, 382b to form a pivot point A for the distal effector 30b. This allows for large-angle bending while maintaining a relatively small bending radius. Furthermore, the distal connectors 382a, 382b are provided with a driving bending portion 383, which allows for a larger spacing between the meshing points (pivot point A) of the proximal connectors 381a, 381b and the distal connectors 382a, 382b. This allows for a smaller driving force for bending under the same bending torque, making it easier to achieve a driving bending motion.

[0076] like Figure 5As shown, the driving bending portion 383 is plugged into and mated with the bending member 36. In one embodiment, the driving bending portion 383 is configured as a socket structure, and the distal end of the bending member 36 has a hooking protrusion 3622 structure that mates with the socket. The distal end of the hooking protrusion 3622 has an extended edge. When the hooking protrusion 3622 is plugged into the socket, the extended edge of the hooking protrusion 3622 is located outside the upper edge of the socket. As an alternative embodiment, the driving bending portion 383 of the distal connecting members 382a and 382b is configured as a pivot structure with an axial direction perpendicular to the clamping surface, and the distal end of the bending member 36 is configured as a socket or slot structure.

[0077] The thickness of the distal end of the bending member 36 is perpendicular to the pivot axis, while its width is parallel to the pivot axis. The thickness of the bending member 36 is smaller than its width. Thus, when the distal actuator 30b bends relative to the proximal body 30a, the bending member 36 only needs to bend and deform in the thickness direction of its distal end, reducing the radial space required for bending.

[0078] Specifically, in one embodiment, the bending member 36 is an integral structure formed by one part, which can be constructed as a deformable sheet member with the entire plate surface parallel to the pivot axis, or as a deformable sheet member with the proximal plate surface perpendicular to the pivot axis and the distal plate surface parallel to the pivot axis. The sheet member is a structure with a length and width much greater than its thickness. In another embodiment, as Figure 6 As shown, the bending member 36 is a detachable, split structure comprising a proximal fixed tab 361 and a distal deformable tab 362. Both the fixed tab 361 and the deformable tab 362 are sheet structures whose length and width are much greater than their thickness. The proximal ends of the fixed tab 361 and the deformable tab 362 are connected to the distal end of the fixed tab 361, and the distal end of the deformable tab 362 is fixedly connected to the driving bending portion 383 of the distal connector. The width of the deformable tab 362 is parallel to the pivot axis, while the thickness of the deformable tab 362 is perpendicular to the pivot axis. The width of the fixed tab 361 is perpendicular to the pivot axis, while the thickness of the fixed tab 361 is parallel to the pivot axis. When the distal execution portion 30b bends relative to the proximal main body portion 30a, the deformable pull tab 362 bends and deforms in the thickness direction, reducing the radial movement space required during bending, thereby reducing the length of the joint assembly 38 and being able to adapt to a narrow surgical environment.

[0079] Since the end effector assembly 30 described in the embodiment of the present invention is operated to bend a large angle toward one side of the longitudinal axis C, for example, the maximum bending angle can reach 90°. In order to enable the distal effector 30b to move smoothly relative to the proximal main body 30a during the bending process, in one embodiment, the bending member 36 can be slidably extended and retracted by a first set distance along the longitudinal axis relative to the support body 34, wherein the first set distance is ≤2mm; in this way, when the bending member 36 is operated to move distally or proximally to drive the distal effector 30b to bend around the pivot point (the junction between the proximal connector and the distal connector), the bending member 36 can slide a certain distance relative to the support body 34, thereby avoiding the problem of excessive deformation of the bending member 36 causing interference with other components and thus affecting the smoothness of the bending.

[0080] In a specific embodiment, Figure 6 As shown, the proximal end of the deformable pull tab 362 is connected to the distal end of the fixed pull tab 361 and can slide relative thereto for a first set distance along the longitudinal axis, wherein the proximal end of the deformable pull tab 362 and the distal end of the fixed pull tab 361 are slidably plugged in and matched, the deformable pull tab 362 is provided with a sliding slot 3621 extending along the longitudinal axis, the fixed pull tab 361 is provided with a sliding protrusion 3611, the sliding protrusion 3611 is plugged into the sliding slot 3621, and a sliding gap a of a first set distance is provided between the two along the longitudinal axis. In other alternative embodiments, the above-mentioned slidable plug-in matching structure can also adopt a method in which the deformable pull tab 362 is provided with a sliding protrusion and the fixed pull tab 361 is provided with a sliding slot. Figure 6 As shown, in order to achieve reliable connection and fixation between the deformable pull tab 362 and the fixed pull tab 361, and prevent the deformable pull tab 362 from radially escaping from the fixed pull tab 361 during the bending process, the length of the free end of the sliding protrusion 3611 arranged on the fixed pull tab 361 and located on the outside of the sliding slot 3621 is greater than the length of the sliding slot 3621. When the sliding protrusion 3611 is engaged with the sliding slot 3621, its free end can prevent the deformable pull tab 362 from radially escaping from the fixed pull tab 361, thereby achieving reliable connection between the fixed pull tab 361 and the deformable pull tab 362.

[0081] like Figure 3As shown, the deformable pull tab 362 and the fixed pull tab 361 are plugged into the support body 34. Specifically, the deformable pull tab 362 and the fixed pull tab 361 are respectively installed on the surfaces of the first half support body 34 and the second half support body 34 that are opposite to each other, wherein the two side surfaces of the fixed pull tab 361 are respectively in contact with the opposite surfaces of the first half support body 34a and the second half support body 34, and the first half support body 34 and the second half support body 34 respectively have a notch 342 extending roughly along the longitudinal axis in a partial area close to the proximal connecting parts 381a and 381b, and the deformable pull tab 362 is plugged into the notch 342.

[0082] In order to limit the radial position of the deformable pull tab 362, the first half support body 34 and the second half support body 34 are respectively provided with a limiting protrusion 343 in the notch 342 area, and the limiting protrusion 343 is parallel to the side wall of the notch 342. When the distal executive part 30b is bent relative to the proximal main body part 30a, at least one side surface of the deformable pull tab 362 abuts against the limiting protrusion 343 or the side wall of the notch 342.

[0083] Since the deformable pull tab 362 is deformed during the bending of the distal actuator 30b, in order to provide it with deformation space, the width of the distal side of the notch 342 of the support body 34 is greater than the width of the proximal side. More specifically, as shown in FIG. Figure 8 As shown, the notch 342 includes a first area A1, a transition area A3 and a second area A2 from the proximal end to the distal end. The width of the first area A1 is slightly larger than the thickness of the deformable pull tab 362, and the width of the second area A2 is larger than the width of the first area A1. The limiting protrusion 343 is arranged parallel to and opposite to part of the side wall of the second area A2 of the notch 342. When the deformable pull tab 362 is deformed, both side surfaces can provide friction for the deformable pull tab 362, thereby increasing the stability of the bending of the distal actuator 30b.

[0084] Figures 9-14 FIG. 3 shows the joint motion process of the end effector assembly 30 provided by the embodiment of the present utility model. Figure 9 、 Figure 10 As shown, at this time, the distal effector 30b extends along the longitudinal axis C, that is, when the distal effector 30b and the proximal body portion 30a extend in the same direction, the angle between the distal effector 30b and the longitudinal axis C is 0° or approximately 0°, and the driving bending portion 383 of the distal connecting member 382a is located distal to the pivot point A. Operating the bending knob 12 of the surgical instrument 100 causes the bending member 36 to move proximally, driving the driving bending portion 383 to pivot about the pivot point A, causing the distal effector 30b to bend gradually away from the longitudinal axis C and eventually reach a position with a maximum unilateral bending angle, as shown in Figures 11 and 12. Figure 12 It is understood that, during the bending of the distal actuator 30b relative to the proximal body 30a, the meshing position (i.e., the pivot point A) of the proximal connecting member 381a and the distal connecting member 382a does not remain fixed, but changes with the position of the meshing teeth.

[0085] In one embodiment, the joint assembly 38 can be implemented by a proximal connecting member 381a, 381b and a distal connecting member 382a, 382b to achieve the bending motion of the distal actuator 30b; as an alternative embodiment, refer to Figure 3 、 Figure 4 Two proximal connectors 381a and 381b are provided, namely an upper proximal connector 381a and a lower proximal connector 381b. Two distal connectors 382a and 382b are also provided, namely an upper distal connector 382a and a lower distal connector 382b. In this embodiment, the upper proximal connector 381a extends distally from the distal end of the first half support body 34a and is fixedly connected by means of, for example, a slot and a snap-on protrusion. Similarly, the lower proximal connector 381ab extends distally from the distal end of the second half support body 34b. The lower proximal connector 381b is fixedly connected to the second half support body 34b by means of a slot and a snap-on protrusion. The upper distal connector 382a is connected to the staple cartridge assembly 31, and the lower distal connector 382b is connected to the anvil assembly 32. The bending stability of the distal actuator 30b can be further improved by providing two groups of proximal connecting members 381a and 381b and two groups of distal connecting members.

[0086] Specifically, the upper distal connecting member 382a is connected to the staple cartridge base 311 via a positioning pin, thereby ensuring a fixed and non-rotatable connection between the upper distal connecting member 382a and the staple cartridge base 311. The lower distal connecting member 382b is connected to the anvil housing 321 via a positioning pin, thereby ensuring a fixed and non-rotatable connection between the lower distal connecting member 382b and the anvil housing 321. In addition, the upper distal connecting member 382a and the lower distal connecting member 382b are connected via a positioning pin, thereby ensuring a fixed connection between the upper distal connecting member 382a and the lower distal connecting member 382b, thereby driving the staple cartridge assembly 31 and the anvil assembly 32 to achieve synchronous bending. It is understood that the upper distal connector 382a and the lower distal connector 382b are fixedly connected to the staple cartridge assembly 31 and the anvil assembly 32 in a non-bendable manner, while the staple cartridge assembly 31 and / or the anvil assembly 32 can pivot relative to the upper distal connector 382a and the lower distal connector 382b in closing and opening directions. The provision of upper and lower proximal connectors 381a, 381b and distal connectors 382a, 382b, respectively, allows for better synchronization of the bending of the anvil assembly 32 and the staple cartridge assembly 31 of the distal actuator 30b, more uniform bending positions, and smoother bending. Of course, it is understandable that the proximal connecting members 381a, 381b and the distal connecting members 382a, 382b can also be provided one each, which can also enable the distal actuator 30b to bend around the pivot point A formed by the proximal connecting members 381a, 381b and the distal connecting members 382a, 382b.

[0087] Furthermore, in this embodiment, the retaining member 384 is accommodated in the installation space formed by the area between the upper and lower distal connecting members 382a, 382b and the upper and lower proximal connecting members 381a, 381b, so as to avoid being exposed to the outside, thereby ensuring the movement stability of the firing member 35. Specifically, as Figure 10 As shown, the upper proximal connecting member 381a is provided with a proximal pivot hole 51, and the upper distal connecting member 382a is provided with a distal pivot hole 52. The proximal pivot shaft 41 of the retaining member 384 passes through the proximal pivot hole 51 of the upper proximal connecting member 381a, and the distal pivot shaft 42 of the retaining member 384 passes through the distal pivot hole 52 of the upper distal connecting member 382a. The pivot shaft and the ends of the pivot shaft are riveted to the first connecting piece 385. The first connecting piece 385 is provided with two connecting holes, and the ends of the proximal pivot shaft 41 and the distal pivot shaft 42 of the retaining member 384 are riveted to the connecting holes of the first connecting piece 385.

[0088] The joint assembly 38 further includes a second connecting piece 386, such as Figure 3As shown, the lower proximal connecting member 381b and the lower distal connecting member 382b are riveted to the second connecting piece 386 via a rotating shaft. The second connecting piece 386 is provided with two connecting holes, and the ends of the rotating shafts on the lower proximal connecting member 381b and the lower distal connecting member 382b are riveted to the connecting holes of the second connecting piece 386.

[0089] In order to enable the end effector assembly 30 of the embodiment of the present invention to be adapted to the main body of the surgical instrument 100 in the prior art (including the handle assembly 10 and the slender body assembly 20), that is, the end effector assembly 30 of the embodiment of the present invention can be adapted to the main body of the same surgical instrument 100 as the end effector assembly of the same specification and size in the existing design, in an alternative embodiment, the end effector assembly 30 is preset to a certain bending angle when it is not initially loaded on the surgical instrument. For example, as shown in FIG. 13, Figure 14 As shown, when the end effector assembly 30 is in the ready-to-load position, the distal effector 30 b forms a set first angle α1 with the longitudinal axis C.

[0090] Specifically, after the end effector assembly 30 in the loading position is mounted on the elongated body assembly 20 of the surgical instrument 100, the bending knob 12 of the handle assembly 10 is operated to move the bending member 36 proximally by a first distance. Accordingly, the distal effector 30b of the end effector assembly 30 is further bent away from the longitudinal axis C to a second angle α2 on the basis of having been bent at the first angle α1, as shown in FIG. Figure 12 Similarly, after the end effector assembly 30 in the loading position is mounted on the elongated body assembly 20 of the surgical instrument 100, the bending knob 12 of the handle assembly 10 is operated to move the bending member 36 distally by a second distance. Accordingly, the distal effector portion 30b of the end effector assembly 30, having been bent at the first angle α1, is further pivoted toward the direction close to the longitudinal axis C and finally forms 0° or substantially 0° with the longitudinal axis C, as shown in FIG. Figure 9 、 Figure 10 The first distance and the second distance may be the same or different.

[0091] When the end effector assembly 30 of the present embodiment is adapted to a conventional surgical instrument 100, the first distance may correspond to the distance the bending member 36 moves when the end effector 30 is bent to the right to its maximum angle; the second distance may correspond to the distance the bending member 36 moves when the end effector 30 is bent to the left to its maximum angle. This configuration of the end effector 30 further enhances the versatility and adaptability of the end effector assembly of the present embodiment.

[0092] In an alternative embodiment, when the end effector assembly 30 is in the loading position, the distal effector extends along the longitudinal axis; after the end effector assembly 30 in the loading position is installed on the slender body assembly 20 of the surgical instrument 100, the bending knob 12 of the handle assembly 10 is operated to move the bending member 36 proximally by a first distance, so as to drive the driving bending portion 383 to move, so that the distal effector 30b deviates from the longitudinal axis C and bends in the first direction to a maximum angle; after the end effector assembly 30 in the loading position is installed on the slender body assembly 20 of the surgical instrument 100, the bending knob 12 of the handle assembly 10 is operated to move the bending member 36 distally by a second distance, wherein the first distance and the second distance may be equal or unequal, so as to drive the driving bending portion 383 to move, so that the distal effector 30b deviates from the longitudinal axis C and bends in the second direction to a maximum bending angle, thereby realizing bidirectional bending of the end effector 30.

[0093] In another alternative embodiment, when the end effector assembly is in the ready-to-load position, the distal effector portion extends along the longitudinal axis;

[0094] When the distal actuator is arranged along the longitudinal axis, after the end actuator assembly 30 in the loading position is installed on the slender body assembly 20 of the surgical instrument 100, the bending knob 12 of the operating handle assembly 10 is used to operate the bending member 36 to move proximally for a first distance, and the driving bending portion 383 is moved to gradually increase the bending angle of the distal actuator 30b until it reaches the maximum bending angle; when the distal actuator 30b is at the maximum bending angle, the bending knob 12 of the operating handle assembly 10 is used to operate the bending member 36 to move distally for a second distance, and the driving bending portion 383 is moved to gradually decrease the bending angle of the distal actuator 30b until the distal actuator 30b is extended along the longitudinal axis C, so as to realize the bidirectional bending of the end actuator 30.

[0095] Reference Figure 17 As shown, the proximal main body portion 30a further includes a locking member 37 for positioning the bending member 36 and the firing member 35 in the initial position when the end execution assembly 30 is in the loading position. Specifically, as shown in FIG. Figure 18 As shown, the locking member 37 includes a first locking portion 371 and a second locking portion 372. When the end execution assembly 30 is in the loading position, the first locking portion 371 cooperates with the bending member 36 to achieve the locking of the bending member 36, and the second locking portion 372 cooperates with the firing member 35 to achieve the locking of the firing member 35. The locking member 37 can be used to simultaneously achieve the locking of the bending member 36 and the firing member 35.

[0096] The locking member 37 is rotatably mounted on the engaging portion 34c located near the supporting body 34 and can be switched between a locked position and an unlocked position. When the locking member 37 is rotated to the locked position, the locking member 37 is locked. Figure 19 As shown, the first locking portion 371 is locked with the bending member 36, and the second locking portion 372 is locked with the firing member 35. At this time, the end execution assembly 30 is in the ready-to-load position; when the locking member 37 is rotated to the unlocking position, as shown Figure 20 As shown, the first locking portion 371 is disengaged from the bending member 36 , the second locking portion 372 is disengaged from the firing member 35 , and the bending member 36 is unlocked from the firing member 35 and can slide relative to the support body 34 .

[0097] The locking member 37 is locked with the bending member 36 and the firing member 35 by means of rotational plugging. Figure 18 As shown, the locking member 37 is configured as a semi-annular sleeve with a notch, and the semi-annular sleeve has a first wall 374 and a second wall 375 that are arranged opposite to each other and form the notch. The first locking portion 371 is configured as a first protrusion extending circumferentially along the side wall (i.e., the first wall 374 or the second wall 375) of the notch formed by the locking member 37, and the second locking portion 372 is configured as a second protrusion extending inwardly along the inner wall of the locking member 37; correspondingly, as shown in FIG. Figure 18 As shown, the bending member 36 is provided with a bending locking groove 36b. When the locking member 37 is rotated to the locking position, the first protrusion of the locking member 37 is inserted into the bending locking groove 36b of the bending member 36, thereby achieving the locking of the bending member 36; the firing beam 351 is provided with a firing locking groove. When the locking member 37 is rotated to the locking position, the second protrusion of the locking member 37 is inserted into the firing locking groove of the firing member 35, thereby achieving the locking of the firing member 35.

[0098] like Figures 18-20 As shown, the locking member 37 further includes an unlocking drive portion 373. When the end effector assembly 30 is in the loading position, the unlocking drive portion 373 is acted upon by the circumferential force of the driving protrusion within the slender body assembly 20, thereby driving the locking member 37 to rotate about the support body 34 and disengage from the bending member 36 and the firing member 35. The unlocking drive portion 373 is configured as an extension piece extending proximally along the proximal end surface of the semi-annular sleeve. To improve the rotational stability of the locking member 37, two unlocking drive portions 373 are symmetrically provided on the locking member 37 along the circumferential direction. Correspondingly, two driving protrusions for driving the unlocking drive portion 373 are provided on the inner wall of the slender body of the slender body assembly 20.

[0099] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An end effector assembly adapted for a surgical instrument, comprising: a proximal body portion defining a longitudinal axis and including a bending member; The distal actuator comprises a staple cartridge assembly and an anvil assembly for clamping tissue, wherein the distal actuator is pivotally connected to the proximal main body via a joint assembly, wherein the joint assembly comprises: a proximal connecting member, fixedly connected to the distal end of the proximal main body; The distal connecting member is fixedly connected to the proximal end of the distal implementing portion, the distal connecting member is meshedly connected to the proximal connecting member, and the distal connecting member is provided with a driving bending portion, and the bending member can operably drive the driving bending portion to move so that the distal implementing portion bends relative to the proximal main body.

2. The end effector assembly according to claim 1, wherein: The engaging position of the distal connecting member and the proximal connecting member forms a pivot point, and the pivot point defines a pivot axis. The distal actuator bends around the pivot axis relative to the proximal main body. The thickness direction of the distal area of ​​the bending member is perpendicular to the pivot axis, the width direction of the distal area of ​​the bending member is parallel to the pivot axis, and the thickness of the bending member is less than the width.

3. The end effector assembly according to claim 2, wherein: The bending member includes a fixed pull tab and a deformable pull tab, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab and can slide a first set distance relative to it along the longitudinal axis, and the distal end of the deformable pull tab is fixedly connected to the driving bending portion of the distal connecting member.

4. The end effector assembly according to claim 3, wherein: The width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is smaller than the width.

5. The end effector assembly according to claim 3, wherein: The driving bending portion includes a socket formed on the distal connecting piece, and the distal end of the deformable pull tab has a hooking protrusion, and the hooking protrusion is plugged into and matched with the socket.

6. The end effector assembly according to claim 5, wherein: The end of the hooking protrusion has an extension edge. When the hooking protrusion is plugged into the insertion hole, the extension edge of the hooking protrusion is located outside the upper edge of the insertion hole.

7. The end effector assembly according to claim 3, wherein: The proximal end of the deformable pull tab and the distal end of the fixed pull tab are slidably engaged with each other, and include a sliding slot hole provided on one of the deformable pull tab and the fixed pull tab, wherein the sliding slot hole extends along the longitudinal axis direction, and a sliding protrusion provided on the other of the deformable pull tab and the fixed pull tab, wherein the sliding protrusion is inserted into the sliding slot hole and a sliding gap of a first set distance is provided between the two along the longitudinal axis direction.

8. The end effector assembly according to claim 7, wherein: The length of the free end portion of the sliding protrusion located outside the sliding slot is greater than the length of the sliding slot.

9. The end effector assembly according to claim 3, wherein: The proximal main body portion includes an outer sleeve and a support body located in the outer sleeve, and the bending member is installed on the support body.

10. The end effector assembly according to claim 9, wherein: The support body has a notch extending substantially along the longitudinal axis in a partial area close to the proximal connecting piece, and the deformable pull tab is installed in the notch.

11. The end effector assembly according to claim 10, wherein: The support body is provided with a limiting protrusion in the notch area, and the limiting protrusion is parallel to the side wall of the notch. When the distal execution part bends relative to the proximal main body, at least one side surface of the deformable pull tab abuts against the limiting protrusion or the side wall of the notch.

12. The end effector assembly according to claim 11, wherein: The notch includes a first area, a transition area and a second area from the proximal end to the distal end. The width of the first area is smaller than that of the second area. The limiting protrusion is arranged parallel to and opposite to a portion of the side wall of the second area of ​​the notch.

13. The end effector assembly according to claim 1, wherein: The proximal main body portion further includes a firing member, and the joint assembly further includes a retaining member pivotally connected to the proximal connecting member and the distal connecting member, respectively, and the retaining member has a retaining channel for accommodating the firing member.

14. The end effector assembly according to claim 13, wherein: The retaining member is respectively provided with a proximal pivot shaft and a distal pivot shaft; the proximal pivot shaft of the retaining member is pivotally matched with the proximal pivot hole of the proximal connecting member, and the distal pivot shaft of the retaining member is pivotally matched with the distal pivot hole of the distal connecting member.

15. The end effector assembly according to claim 14, wherein: The joint assembly also includes a first connecting plate, which is provided with two connecting holes. The proximal pivot axis and the distal pivot axis of the retaining member respectively pass through the proximal pivot hole of the proximal connecting member and the distal pivot hole of the distal connecting member and are riveted to the connecting holes of the first connecting plate.

16. The end effector assembly according to claim 1, wherein: When the end effector assembly is in the ready-to-load position, the distal effector portion and the longitudinal axis have an angle that is not 0°; When the end execution assembly is in the loading position, the bending member can be operably moved from the distal side to the proximal side to drive the driving bending part to move, so that the bending angle of the distal execution part becomes larger; the bending member can be operably moved from the proximal side to the distal side to drive the driving bending part to move, so that the bending angle of the distal execution part becomes smaller, until it is extended along the longitudinal axis.

17. The end effector assembly according to claim 1, wherein: When the end effector assembly is in the ready-to-load position, the distal effector extends along the longitudinal axis; When the distal actuator is arranged along the longitudinal axis, the bending member is operable to move from the distal side to the proximal side to drive the driving bending portion to move, so that the distal actuator deviates from the longitudinal axis and bends in a first direction; the bending member is operable to move from the proximal side to the distal side to drive the driving bending portion to move, so that the distal actuator deviates from the longitudinal axis and bends in a second direction.

18. The end effector assembly according to claim 1, wherein: When the end effector assembly is in the ready-to-load position, the distal effector extends along the longitudinal axis; When the distal actuator is arranged along the longitudinal axis, the bending member is operable to move from the distal side to the proximal side, so as to drive the bending portion to move and increase the bending angle of the distal actuator; when the distal actuator is in a bent state, the bending member is operable to move from the proximal side to the distal side, so as to drive the bending portion to move and decrease the bending angle of the distal actuator until it is extended along the longitudinal axis.

19. The end effector assembly according to any one of claims 16 to 18, characterized in that: The proximal main body also includes a locking member rotatably mounted on its proximal side, and the locking member includes a first locking portion. When the end execution assembly is in the loading position, the first locking portion cooperates with the bending member to lock the bending member.

20. An end effector assembly adapted for a surgical instrument, characterized in that: include: The distal execution part includes a nail cartridge assembly and a nail anvil assembly for clamping tissue; a proximal body portion defining a longitudinal axis, comprising a support body and a bending member mounted on the support body, the bending member being slidable and retractable relative to the support body along the longitudinal axis by a first set distance; and a joint assembly located between the distal actuator and the proximal body, the joint assembly comprising: a proximal connecting member, fixedly connected to the distal end of the proximal main body; The distal connecting member is fixedly connected to the proximal end of the distal actuator, and the distal connecting member is engaged with the proximal connecting member. The distal connecting member is provided with a driving bending portion, and the bending member can operably drive the driving bending portion to move so that the distal actuator is bent relative to the proximal main body around the engagement position of the two.

21. The end effector assembly according to claim 20, wherein: The bending member includes a fixed pull tab and a deformable pull tab, the fixed pull tab is fixedly connected to the supporting body, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab and can slide a first set distance relative to it along the longitudinal axis direction, and the distal end of the deformable pull tab is fixedly connected to the driving bending portion of the distal connecting member.

22. The end effector assembly according to claim 21, wherein: The engaging position of the distal connecting member and the proximal connecting member forms a pivot point, and the pivot point defines a pivot axis. The distal actuator bends around the pivot axis relative to the proximal main body. The width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is less than the width.

23. An end effector assembly adapted for a surgical instrument, characterized in that: include: The distal execution part includes a nail cartridge assembly and a nail anvil assembly for clamping tissue; a proximal body portion defining a longitudinal axis and comprising a support body and a bending member mounted on the support body; and a joint assembly located between the distal actuator and the proximal body, the joint assembly comprising: a proximal connecting member, fixedly connected to the distal end of the proximal main body; The distal connecting member is fixedly connected to the proximal end of the distal actuator, and the distal connecting member is engaged with the proximal connecting member, and the engagement position of the two forms a pivot point, and the pivot point defines a pivot axis. The distal connecting member is provided with a driving bending portion, and the bending member can operably drive the driving bending portion to move so that the distal actuator is bent around the pivot axis relative to the proximal main body. The thickness direction of the distal end area of ​​the bending member is perpendicular to the pivot axis, the width direction of the distal end area of ​​the bending member is parallel to the pivot axis, and the thickness of the bending member is less than the width.

24. The end effector assembly according to claim 23, wherein: The bending member includes a fixed pull tab and a deformable pull tab, the fixed pull tab is fixedly connected to the supporting body, the proximal end of the deformable pull tab is connected to the distal end of the fixed pull tab, the width direction of the deformable pull tab is parallel to the pivot axis, the thickness direction of the deformable pull tab is perpendicular to the pivot axis, and the thickness of the deformable pull tab is smaller than the width.

25. A surgical instrument comprising a handle assembly, an elongated body assembly, and an end effector assembly connected in sequence from a proximal end to a distal end, characterized in that: The end execution assembly adopts any one of the end execution assembly described in claims 1-24.

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